/* roulang page: index */
:root {
            --color-primary: #0F4C81;
            --color-primary-dark: #0A3A62;
            --color-primary-light: #EAF1F8;
            --color-secondary: #2E7D32;
            --color-secondary-light: #E8F5E9;
            --color-gold: #C8A44D;
            --color-gold-dark: #B8943A;
            --color-bg: #F7F9FC;
            --color-white: #FFFFFF;
            --color-bg-alt: #EEF2F7;
            --color-bg-dark: #0D2B45;
            --color-footer: #0B1F33;
            --color-text-title: #0B1F33;
            --color-text-body: #1C304A;
            --color-text-muted: #5B6B7C;
            --color-text-light: #8B98A8;
            --color-border: #E3E9F0;
            --color-focus: #C8A44D;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 4px 16px rgba(15, 76, 129, 0.06);
            --shadow-md: 0 10px 28px rgba(15, 76, 129, 0.12);
            --shadow-lg: 0 16px 40px rgba(15, 76, 129, 0.18);
            --transition: 0.25s ease;
            --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', 'Roboto', 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --gutter: 24px;
            --section-space: 88px;
            --section-space-mobile: 60px;
            --header-height: 76px;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }

        a:hover {
            color: var(--color-primary-dark);
        }

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul, ol {
            list-style: none;
        }

        strong, b {
            font-weight: 700;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--color-text-title);
            font-weight: 700;
            line-height: 1.3;
        }

        h1 {
            font-size: clamp(26px, 4vw, 40px);
            letter-spacing: -0.01em;
        }

        h2 {
            font-size: clamp(24px, 3vw, 32px);
            letter-spacing: -0.005em;
        }

        h3 {
            font-size: clamp(18px, 2vw, 22px);
            font-weight: 600;
        }

        h4 {
            font-size: 18px;
            font-weight: 600;
        }

        p {
            margin-bottom: 1em;
            color: var(--color-text-body);
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding-left: var(--gutter);
            padding-right: var(--gutter);
        }

        .section {
            padding-top: var(--section-space);
            padding-bottom: var(--section-space);
        }

        .section--white {
            background-color: var(--color-white);
        }

        .section--alt {
            background-color: var(--color-bg-alt);
        }

        .section--dark {
            background-color: var(--color-bg-dark);
        }

        .section--footer {
            background-color: var(--color-footer);
        }

        .section__header {
            max-width: 680px;
            margin-bottom: 48px;
        }

        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section__tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-secondary);
            background-color: var(--color-secondary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .section__title {
            margin-bottom: 16px;
            color: var(--color-text-title);
        }

        .section__desc {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 0;
        }

        .section__title--white,
        .section--dark .section__title,
        .section--footer .section__title {
            color: var(--color-white);
        }

        .section--dark .section__desc,
        .section--footer .section__desc {
            color: rgba(255, 255, 255, 0.75);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            min-height: 44px;
            text-decoration: none;
            white-space: nowrap;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 2px solid var(--color-focus);
            outline-offset: 3px;
        }

        .btn--primary {
            background-color: var(--color-primary);
            color: var(--color-white);
            border: 1px solid var(--color-primary);
        }

        .btn--primary:hover {
            background-color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn--primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn--secondary {
            background-color: var(--color-white);
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
        }

        .btn--secondary:hover {
            background-color: var(--color-primary-light);
            color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn--secondary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn--gold {
            background-color: var(--color-gold);
            color: var(--color-text-title);
            border: 1px solid var(--color-gold);
        }

        .btn--gold:hover {
            background-color: var(--color-gold-dark);
            border-color: var(--color-gold-dark);
            color: var(--color-text-title);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn--white-outline {
            background-color: transparent;
            color: var(--color-white);
            border: 1px solid rgba(255, 255, 255, 0.6);
        }

        .btn--white-outline:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: var(--color-white);
            color: var(--color-white);
            transform: translateY(-2px);
        }

        .btn--sm {
            font-size: 14px;
            padding: 8px 18px;
            min-height: 36px;
        }

        .btn--lg {
            font-size: 16px;
            padding: 16px 36px;
            min-height: 52px;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 76, 129, 0.08);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text-title);
            letter-spacing: -0.01em;
            text-decoration: none;
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--color-primary);
        }

        .logo__icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background-color: var(--color-primary);
            color: var(--color-white);
            border-radius: 8px;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav__list {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav__link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-body);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .main-nav__link:hover {
            color: var(--color-primary);
            background-color: var(--color-primary-light);
        }

        .main-nav__link.active {
            color: var(--color-primary);
            background-color: var(--color-primary-light);
            font-weight: 600;
        }

        .lang-switch {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            height: 36px;
            padding: 0 4px;
            border: 1px solid var(--color-border);
            border-radius: 20px;
            background-color: var(--color-white);
            flex-shrink: 0;
            margin-left: 12px;
        }

        .lang-switch__item {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 4px 12px;
            font-size: 13px;
            font-weight: 600;
            border-radius: 16px;
            color: var(--color-text-muted);
            transition: all var(--transition);
            min-height: 28px;
        }

        .lang-switch__item:hover {
            color: var(--color-primary);
        }

        .lang-switch__item.active {
            background-color: var(--color-primary);
            color: var(--color-white);
        }

        .header-cta {
            margin-left: 12px;
            flex-shrink: 0;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
            border-radius: 4px;
        }

        .hamburger__bar {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--color-text-title);
            border-radius: 2px;
            transition: all 0.3s ease;
            transform-origin: center;
        }

        .hamburger.open .hamburger__bar:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.open .hamburger__bar:nth-child(2) {
            opacity: 0;
        }
        .hamburger.open .hamburger__bar:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(180deg, #F0F5FB 0%, #F7F9FC 55%, var(--color-bg) 100%);
            padding-top: calc(var(--header-height) + 48px);
            padding-bottom: 48px;
            border-bottom: 1px solid var(--color-border);
        }

        .hero__inner {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 48px;
            align-items: center;
            min-height: 360px;
        }

        .hero__title {
            font-size: clamp(28px, 3.8vw, 40px);
            font-weight: 800;
            color: var(--color-text-title);
            margin-bottom: 18px;
            letter-spacing: -0.02em;
            line-height: 1.25;
        }

        .hero__title .highlight {
            color: var(--color-primary);
            position: relative;
        }

        .hero__subtitle {
            font-size: 16px;
            line-height: 1.9;
            color: var(--color-text-muted);
            margin-bottom: 28px;
            max-width: 520px;
        }

        .hero__actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero__data-row {
            display: flex;
            gap: 24px;
            margin-top: 32px;
            border-top: 1px solid var(--color-border);
            padding-top: 24px;
            flex-wrap: wrap;
        }

        .hero__data-item {
            display: flex;
            flex-direction: column;
        }

        .hero__data-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
        }

        .hero__data-label {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: 4px;
        }

        .hero__visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background-color: var(--color-bg-dark);
            aspect-ratio: 16/10;
        }

        .hero__visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
        }

        .hero__visual-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(0deg, rgba(11, 31, 51, 0.85) 0%, rgba(11, 31, 51, 0) 100%);
            padding: 40px 24px 20px;
            color: var(--color-white);
            font-size: 14px;
            font-weight: 500;
        }

        .hero__visual-overlay strong {
            color: var(--color-gold);
            font-weight: 700;
        }

        /* Pain Point Section */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .pain-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .pain-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(15, 76, 129, 0.25);
        }

        .pain-card__icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background-color: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 20px;
            margin-bottom: 18px;
        }

        .pain-card__title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 10px;
        }

        .pain-card__text {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Solution Section */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .solution-step {
            background-color: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition);
            position: relative;
        }

        .solution-step:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: rgba(200, 164, 77, 0.5);
        }

        .solution-step__num {
            font-size: 40px;
            font-weight: 800;
            color: var(--color-gold);
            line-height: 1;
            margin-bottom: 14px;
            opacity: 0.85;
        }

        .solution-step__title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 10px;
        }

        .solution-step__text {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Result / Data Section */
        .result-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .result-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: center;
        }

        .result-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .result-card__num {
            font-size: 42px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.1;
            margin-bottom: 6px;
        }

        .result-card__num span {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-gold);
        }

        .result-card__label {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-title);
            margin-bottom: 6px;
        }

        .result-card__desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Testimonial Section */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .testimonial-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }

        .testimonial-card__quote {
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text-body);
            margin-bottom: 20px;
            font-style: italic;
        }

        .testimonial-card__user {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--color-border);
            padding-top: 18px;
        }

        .testimonial-card__avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background-color: var(--color-primary-light);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
        }

        .testimonial-card__name {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-title);
        }

        .testimonial-card__source {
            font-size: 13px;
            color: var(--color-secondary);
            font-weight: 500;
        }

        /* Brand Section */
        .brand-section {
            background-color: var(--color-white);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .brand-grid {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 48px;
            align-items: center;
        }

        .brand-visual {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 4/3;
        }

        .brand-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .brand-content__title {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 18px;
        }

        .brand-content__text {
            font-size: 16px;
            line-height: 2;
            color: var(--color-text-body);
            margin-bottom: 12px;
        }

        .brand-content__text:last-child {
            margin-bottom: 0;
        }

        /* News Section */
        .news-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }

        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 24px;
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 22px 26px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .news-item:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(15, 76, 129, 0.25);
            transform: translateX(4px);
        }

        .news-item__date {
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-width: 64px;
            padding: 10px 12px;
            background-color: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            font-weight: 700;
            line-height: 1.2;
        }

        .news-item__date .day {
            font-size: 22px;
        }

        .news-item__date .month {
            font-size: 12px;
            opacity: 0.85;
            margin-top: 2px;
        }

        .news-item__body {
            flex: 1;
            min-width: 0;
        }

        .news-item__title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .news-item__excerpt {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .news-item__link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
        }

        .news-item__link:hover {
            color: var(--color-primary-dark);
        }

        .news-item__link i {
            margin-left: 4px;
            transition: transform var(--transition);
        }

        .news-item__link:hover i {
            transform: translateX(4px);
        }

        /* Deep Content Section */
        .deep-content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .deep-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .deep-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .deep-card__tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-secondary);
            background-color: var(--color-secondary-light);
            padding: 4px 12px;
            border-radius: 16px;
            margin-bottom: 14px;
        }

        .deep-card__title {
            font-size: 19px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 12px;
            line-height: 1.5;
        }

        .deep-card__text {
            font-size: 15px;
            line-height: 1.9;
            color: var(--color-text-body);
            margin-bottom: 0;
        }

        /* Focus Topics Section */
        .focus-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 18px;
        }

        .focus-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            display: block;
            text-decoration: none;
        }

        .focus-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(15, 76, 129, 0.3);
        }

        .focus-card__icon {
            font-size: 28px;
            color: var(--color-primary);
            margin-bottom: 12px;
        }

        .focus-card__title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-title);
            margin-bottom: 4px;
        }

        .focus-card__sub {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        /* Evaluation Wall Section */
        .eval-summary {
            display: grid;
            grid-template-columns: 0.8fr 2.2fr;
            gap: 36px;
            align-items: start;
        }

        .eval-score {
            background-color: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }

        .eval-score__num {
            font-size: 56px;
            font-weight: 800;
            color: var(--color-gold);
            line-height: 1;
        }

        .eval-score__label {
            font-size: 16px;
            font-weight: 600;
            margin-top: 8px;
        }

        .eval-score__count {
            font-size: 13px;
            opacity: 0.8;
            margin-top: 4px;
        }

        .eval-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 14px;
        }

        .eval-item {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            box-shadow: var(--shadow-sm);
        }

        .eval-item__stars {
            color: var(--color-gold);
            font-size: 14px;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .eval-item__text {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .eval-item__user {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text-title);
            flex-shrink: 0;
            white-space: nowrap;
        }

        /* FAQ Section */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .faq-item.open {
            border-color: var(--color-primary);
            background-color: var(--color-primary-light);
            box-shadow: var(--shadow-md);
        }

        .faq-item__question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            border: none;
            background: none;
            width: 100%;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-title);
            border-left: 4px solid var(--color-primary);
            transition: all var(--transition);
        }

        .faq-item__question i {
            font-size: 16px;
            color: var(--color-primary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-item__question i {
            transform: rotate(180deg);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-item__answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        .faq-item__answer p {
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text-body);
            margin-bottom: 0;
        }

        /* CTA Section */
        .cta-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .cta-content__title {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 14px;
        }

        .cta-content__text {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.85;
            margin-bottom: 0;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .cta-form input[type="email"],
        .cta-form input[type="text"] {
            flex: 1;
            min-width: 240px;
            padding: 14px 18px;
            border: 2px solid transparent;
            border-radius: var(--radius-sm);
            font-size: 15px;
            color: var(--color-text-title);
            background-color: var(--color-white);
            transition: border-color var(--transition);
            outline: none;
        }

        .cta-form input:focus {
            border-color: var(--color-gold);
        }

        .cta-form .btn {
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-footer);
            color: var(--color-text-light);
            padding: 56px 0 28px;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            color: var(--color-white);
            font-size: 20px;
            margin-bottom: 14px;
        }

        .footer-brand .logo .logo__icon {
            background-color: var(--color-gold);
            color: var(--color-text-title);
        }

        .footer-brand__desc {
            font-size: 13px;
            color: var(--color-text-light);
            line-height: 1.8;
            margin-bottom: 0;
            max-width: 280px;
        }

        .footer-col__title {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 16px;
        }

        .footer-col__link {
            display: block;
            font-size: 13px;
            color: var(--color-text-light);
            margin-bottom: 10px;
            transition: color var(--transition);
        }

        .footer-col__link:hover {
            color: var(--color-white);
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--color-text-light);
        }

        .footer-bottom a {
            color: var(--color-text-light);
            font-size: 12px;
        }

        .footer-bottom a:hover {
            color: var(--color-white);
        }

        .footer-bottom__links {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1200px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .solution-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .focus-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 992px) {
            :root {
                --section-space: 64px;
            }
            .hero__inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero__visual {
                aspect-ratio: 16/8;
            }
            .pain-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .result-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .brand-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .deep-content-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .eval-summary {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --gutter: 16px;
                --section-space: 52px;
            }

            .hamburger {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                bottom: 0;
                background-color: var(--color-white);
                flex-direction: column;
                align-items: stretch;
                justify-content: flex-start;
                padding: 24px 20px;
                transform: translateX(100%);
                transition: transform 0.35s ease;
                overflow-y: auto;
                z-index: 999;
                box-shadow: 0 20px 40px rgba(15, 76, 129, 0.12);
            }

            .main-nav.open {
                transform: translateX(0);
            }

            .main-nav__list {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                width: 100%;
            }

            .main-nav__link {
                padding: 14px 16px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }

            .lang-switch {
                margin-left: 0;
                margin-top: 16px;
                align-self: flex-start;
            }

            .header-cta {
                margin-left: 16px;
            }

            .header-cta .btn {
                padding: 10px 18px;
                font-size: 14px;
            }

            .hero {
                padding-top: calc(var(--header-height) + 28px);
                padding-bottom: 32px;
            }

            .hero__actions {
                flex-direction: column;
            }

            .hero__data-row {
                gap: 16px;
                flex-wrap: wrap;
            }

            .solution-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .result-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .focus-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .news-item {
                flex-direction: column;
                gap: 12px;
                padding: 18px;
            }

            .news-item__date {
                flex-direction: row;
                gap: 6px;
                min-width: auto;
                border-radius: 4px;
                padding: 6px 12px;
                font-size: 13px;
            }

            .news-item__date .day {
                font-size: 14px;
            }

            .cta-form {
                flex-direction: column;
            }

            .cta-form input[type="email"],
            .cta-form input[type="text"] {
                min-width: 100%;
            }

            .cta-form .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            h1 {
                font-size: 24px;
            }
            h2 {
                font-size: 22px;
            }
            .section__header {
                margin-bottom: 32px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 14px;
                min-height: 42px;
            }
            .hero__visual {
                aspect-ratio: 16/10;
            }
            .focus-grid {
                grid-template-columns: 1fr 1fr;
            }
            .eval-item {
                flex-direction: column;
                gap: 8px;
            }
            .eval-item__user {
                align-self: flex-end;
            }
        }

/* roulang page: category2 */
:root {
  --color-primary: #0F4C81;
  --color-primary-dark: #0A3A62;
  --color-primary-light: #EAF1F8;
  --color-secondary: #2E7D32;
  --color-secondary-light: #E8F5E9;
  --color-gold: #C8A44D;
  --color-gold-dark: #B8943A;
  --color-bg: #F7F9FC;
  --color-white: #FFFFFF;
  --color-bg-alt: #EEF2F7;
  --color-bg-dark: #0D2B45;
  --color-footer: #0B1F33;
  --color-text-title: #0B1F33;
  --color-text-body: #1C304A;
  --color-text-muted: #5B6B7C;
  --color-text-light: #8B98A8;
  --color-border: #E3E9F0;
  --color-focus: #C8A44D;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 4px 16px rgba(15,76,129,0.06);
  --shadow-md: 0 10px 28px rgba(15,76,129,0.12);
  --shadow-lg: 0 16px 40px rgba(15,76,129,0.18);
  --transition: 0.25s ease;
  --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', 'Roboto', 'Helvetica Neue', sans-serif;
  --container: 1200px;
  --gutter: 24px;
  --section-space: 80px;
  --section-space-mobile: 56px;
  --header-height: 76px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  color: var(--color-text-body);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section {
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

.section--white {
  background-color: var(--color-white);
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section--dark {
  background-color: var(--color-bg-dark);
}

.section--footer {
  background-color: var(--color-footer);
}

.section__header {
  max-width: 680px;
  margin-bottom: 48px;
}

.section__header--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section__tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-secondary);
  background-color: var(--color-secondary-light);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.section__title {
  margin-bottom: 16px;
  color: var(--color-text-title);
  font-weight: 700;
  line-height: 1.3;
}

.section__desc {
  font-size: 16px;
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 0;
}

.section__title--white,
.section--dark .section__title,
.section--footer .section__title {
  color: var(--color-white);
}

.section--dark .section__desc,
.section--footer .section__desc {
  color: rgba(255,255,255,0.75);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  min-height: 44px;
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
}

.btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn--secondary:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn--gold {
  background-color: var(--color-gold);
  color: var(--color-text-title);
  border: 1px solid var(--color-gold);
}

.btn--gold:hover {
  background-color: var(--color-gold-dark);
  border-color: var(--color-gold-dark);
  color: var(--color-text-title);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn--sm {
  padding: 8px 18px;
  min-height: 36px;
  font-size: 14px;
}

/* header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text-title);
  letter-spacing: -0.02em;
}

.logo__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 8px;
  font-weight: 800;
  font-size: 18px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  margin-left: 40px;
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.main-nav__list li {
  display: inline-flex;
}

.main-nav__link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-body);
  border-radius: 6px;
  position: relative;
}

.main-nav__link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.main-nav__link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.main-nav__link.active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 2px;
  gap: 2px;
  margin-left: 16px;
}

.lang-switch__item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 32px;
  border-radius: 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all var(--transition);
}

.lang-switch__item.active {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.lang-switch__item:not(.active):hover {
  background-color: var(--color-bg-alt);
  color: var(--color-text-title);
}

.header-cta {
  margin-left: 16px;
  white-space: nowrap;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  padding: 6px;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text-title);
  border-radius: 2px;
  transition: all var(--transition);
}

/* category hero */
.category-hero {
  background: linear-gradient(135deg, #F7F9FC 0%, #EAF1F8 100%);
  padding: 64px 0 72px;
  overflow: hidden;
}

.category-hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--color-text-muted);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb .separator {
  color: var(--color-text-light);
}

.category-hero__title {
  font-size: 38px;
  font-weight: 800;
  color: var(--color-text-title);
  line-height: 1.25;
  margin-bottom: 18px;
}

.category-hero__subtitle {
  font-size: 18px;
  color: var(--color-text-body);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 560px;
}

.category-hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.category-hero__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.category-hero__image img {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
}

/* feature split blocks */
.feature-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 64px;
}

.feature-split:last-child {
  margin-bottom: 0;
}

.feature-split--reverse {
  direction: rtl;
}

.feature-split--reverse > * {
  direction: ltr;
}

.feature-split__content,
.feature-split__media {
  direction: ltr;
}

.feature-split__tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-secondary);
  background-color: var(--color-secondary-light);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.feature-split__title {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text-title);
  margin-bottom: 16px;
}

.feature-split__desc {
  font-size: 16px;
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 20px;
}

.feature-split__media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
}

/* stat strip */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.stat-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.stat-card__number {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-card__label {
  font-size: 14px;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* scenario cards */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
}

.scenario-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.scenario-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}

.scenario-card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-title);
  margin-bottom: 12px;
}

.scenario-card__desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* timeline / process */
.process-timeline {
  counter-reset: step;
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.process-step {
  display: flex;
  gap: 20px;
  margin-bottom: 32px;
  position: relative;
}

.process-step::before {
  counter-increment: step;
  content: counter(step);
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

.process-step__content {
  padding-top: 4px;
}

.process-step__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-title);
  margin-bottom: 8px;
}

.process-step__desc {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-title);
  cursor: pointer;
  background: none;
  width: 100%;
  text-align: left;
  gap: 16px;
}

.faq-question i {
  transition: transform var(--transition);
  color: var(--color-primary);
}

.faq-item.open .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* CTA */
.cta-block {
  background-color: var(--color-bg-dark);
  padding: 64px 0;
  text-align: center;
}

.cta-block__title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.cta-block__desc {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.cta-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
}

.cta-form input[type="email"] {
  flex: 1;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background-color: var(--color-white);
  font-size: 15px;
  outline: none;
}

.cta-form input[type="email"]:focus {
  border-color: var(--color-gold);
}

/* footer */
.site-footer {
  background-color: var(--color-footer);
  color: var(--color-text-light);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-brand__desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-light);
  max-width: 260px;
}

.footer-col__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-col__link {
  display: block;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 10px;
  text-decoration: none;
}

.footer-col__link:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--color-text-light);
}

.footer-bottom__links a {
  color: var(--color-text-light);
  text-decoration: none;
  margin: 0 4px;
}

.footer-bottom__links a:hover {
  color: var(--color-white);
}

.footer-bottom__links span {
  margin: 0 2px;
}

/* responsive */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .category-hero__grid {
    grid-template-columns: 1fr;
  }
  .feature-split {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .feature-split--reverse {
    direction: ltr;
  }
  .stat-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenario-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
  }
  .main-nav {
    order: 3;
    width: 100%;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    margin-left: 0;
    padding: 16px 0;
    border-top: 1px solid var(--color-border);
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav__list {
    flex-direction: column;
    width: 100%;
    align-items: flex-start;
    gap: 6px;
  }
  .main-nav__link {
    display: block;
    width: 100%;
  }
  .lang-switch {
    margin-left: auto;
    margin-right: 8px;
  }
  .header-cta {
    margin-left: 8px;
  }
  .mobile-toggle {
    display: flex;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .scenario-grid {
    grid-template-columns: 1fr;
  }
  .stat-strip {
    grid-template-columns: 1fr 1fr;
  }
  .cta-form {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  :root {
    --section-space: 48px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .stat-strip {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* roulang page: category1 */
:root {
            --color-primary: #0F4C81;
            --color-primary-dark: #0A3A62;
            --color-primary-light: #EAF1F8;
            --color-secondary: #2E7D32;
            --color-secondary-light: #E8F5E9;
            --color-gold: #C8A44D;
            --color-gold-dark: #B8943A;
            --color-bg: #F7F9FC;
            --color-white: #FFFFFF;
            --color-bg-alt: #EEF2F7;
            --color-bg-dark: #0D2B45;
            --color-footer: #0B1F33;
            --color-text-title: #0B1F33;
            --color-text-body: #1C304A;
            --color-text-muted: #5B6B7C;
            --color-text-light: #8B98A8;
            --color-border: #E3E9F0;
            --color-focus: #C8A44D;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 4px 16px rgba(15, 76, 129, 0.06);
            --shadow-md: 0 10px 28px rgba(15, 76, 129, 0.12);
            --shadow-lg: 0 16px 40px rgba(15, 76, 129, 0.18);
            --transition: 0.25s ease;
            --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', 'Roboto', 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --gutter: 24px;
            --section-space: 72px;
            --section-space-mobile: 52px;
            --header-height: 70px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--color-text-title);
            font-weight: 700;
            line-height: 1.35;
            margin: 0 0 1rem;
        }

        h1 {
            font-size: 2.35rem;
        }
        h2 {
            font-size: 1.85rem;
        }
        h3 {
            font-size: 1.3rem;
        }
        p {
            margin: 0 0 1.2rem;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding-left: var(--gutter);
            padding-right: var(--gutter);
        }

        .section {
            padding-top: var(--section-space);
            padding-bottom: var(--section-space);
        }
        .section--white {
            background-color: var(--color-white);
        }
        .section--alt {
            background-color: var(--color-bg-alt);
        }
        .section--dark {
            background-color: var(--color-bg-dark);
        }
        .section--footer {
            background-color: var(--color-footer);
            padding-top: 48px;
            padding-bottom: 28px;
        }

        .section__header {
            max-width: 720px;
            margin-bottom: 44px;
        }
        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section__tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-secondary);
            background-color: var(--color-secondary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
        }
        .section__title {
            margin-bottom: 14px;
            color: var(--color-text-title);
        }
        .section__desc {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 0;
        }

        .section--dark .section__title,
        .section--footer .section__title {
            color: var(--color-white);
        }
        .section--dark .section__desc,
        .section--footer .section__desc {
            color: rgba(255, 255, 255, 0.78);
        }
        .section--dark .section__tag {
            background-color: rgba(255, 255, 255, 0.12);
            color: #C8A44D;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            min-height: 46px;
            text-decoration: none;
            white-space: nowrap;
            line-height: 1.4;
            border: 1px solid transparent;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-focus);
            outline-offset: 3px;
        }
        .btn--primary {
            background-color: var(--color-primary);
            color: var(--color-white);
            border-color: var(--color-primary);
        }
        .btn--primary:hover {
            background-color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn--secondary {
            background-color: transparent;
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .btn--secondary:hover {
            background-color: var(--color-primary-light);
            transform: translateY(-2px);
        }
        .btn--gold {
            background-color: var(--color-gold);
            color: var(--color-text-title);
            border-color: var(--color-gold);
            font-weight: 700;
        }
        .btn--gold:hover {
            background-color: var(--color-gold-dark);
            border-color: var(--color-gold-dark);
            color: var(--color-text-title);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .btn--sm {
            padding: 8px 18px;
            min-height: 38px;
            font-size: 14px;
        }
        .btn--lg {
            padding: 15px 36px;
            font-size: 16px;
            min-height: 52px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            box-shadow: 0 2px 12px rgba(15, 76, 129, 0.04);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-text-title);
            white-space: nowrap;
        }
        .logo:hover {
            color: var(--color-primary);
        }
        .logo__icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background-color: var(--color-primary);
            color: var(--color-white);
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .main-nav__list {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .main-nav__link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: all var(--transition);
            position: relative;
        }
        .main-nav__link:hover {
            color: var(--color-primary);
            background-color: var(--color-primary-light);
        }
        .main-nav__link.active {
            color: var(--color-primary);
            background-color: var(--color-primary-light);
            font-weight: 600;
        }
        .main-nav__link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 3px;
            background-color: var(--color-gold);
            border-radius: 2px;
        }

        .lang-switch {
            display: inline-flex;
            align-items: center;
            gap: 2px;
            border: 1px solid var(--color-border);
            border-radius: 24px;
            padding: 3px;
            background-color: var(--color-bg);
            flex-shrink: 0;
        }
        .lang-switch__item {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 4px 12px;
            font-size: 13px;
            font-weight: 600;
            border-radius: 20px;
            color: var(--color-text-muted);
            transition: all var(--transition);
        }
        .lang-switch__item:hover {
            color: var(--color-primary);
        }
        .lang-switch__item.active {
            background-color: var(--color-primary);
            color: var(--color-white);
        }

        .header-cta {
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background-color: var(--color-text-title);
            border-radius: 2px;
            transition: all var(--transition);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb span {
            color: var(--color-text-light);
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* Category Hero */
        .category-hero {
            background: linear-gradient(135deg, #F0F5FA 0%, #FFFFFF 55%, #EAF1F8 100%);
            padding-top: 48px;
            padding-bottom: 60px;
            border-bottom: 1px solid var(--color-border);
        }
        .category-hero__grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .category-hero__content h1 {
            font-size: 2.5rem;
            margin-bottom: 20px;
            line-height: 1.3;
        }
        .category-hero__content h1 .highlight {
            color: var(--color-primary);
            border-bottom: 3px solid var(--color-gold);
            padding-bottom: 2px;
        }
        .category-hero__desc {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 24px;
            max-width: 520px;
        }
        .hero-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 20px;
        }
        .hero-form input {
            flex: 1;
            min-width: 240px;
            padding: 14px 18px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            background-color: var(--color-white);
            font-size: 15px;
            outline: none;
            transition: all var(--transition);
        }
        .hero-form input:focus {
            border-color: var(--color-focus);
            box-shadow: 0 0 0 3px rgba(200, 164, 77, 0.18);
        }
        .category-hero__image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 4/3;
        }
        .category-hero__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .category-hero__image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 43, 69, 0) 60%, rgba(13, 43, 69, 0.35) 100%);
            pointer-events: none;
        }
        .hero-image-label {
            position: absolute;
            bottom: 16px;
            left: 16px;
            right: 16px;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--color-white);
            font-size: 13px;
            font-weight: 500;
        }
        .hero-image-label span {
            background-color: rgba(11, 31, 51, 0.75);
            padding: 6px 14px;
            border-radius: 20px;
            backdrop-filter: blur(6px);
        }

        /* Depth Content */
        .depth-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .depth-text h3 {
            font-size: 1.4rem;
            margin-bottom: 16px;
            color: var(--color-text-title);
        }
        .depth-text p {
            color: var(--color-text-body);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .depth-text .highlight-box {
            background-color: var(--color-primary-light);
            border-left: 4px solid var(--color-primary);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin-bottom: 16px;
        }
        .depth-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .depth-image img {
            width: 100%;
            aspect-ratio: 3/2;
            object-fit: cover;
        }

        /* Metric Cards */
        .metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 16px;
        }
        .metric-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .metric-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .metric-card__icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background-color: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 1.3rem;
            margin-bottom: 14px;
        }
        .metric-card__number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--color-text-title);
            letter-spacing: -0.02em;
            margin-bottom: 6px;
        }
        .metric-card__label {
            font-size: 14px;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
        }
        .step-item {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px 20px 22px;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .step-item::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background-color: var(--color-primary);
            color: var(--color-white);
            border-radius: 50%;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: var(--color-text-title);
        }
        .step-item p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Tags */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-item {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-muted);
            transition: all var(--transition);
            cursor: default;
        }
        .tag-item:hover {
            color: var(--color-primary);
            border-color: var(--color-primary);
            background-color: var(--color-primary-light);
        }
        .tag-item--active {
            background-color: var(--color-primary);
            color: var(--color-white);
            border-color: var(--color-primary);
        }

        /* Related Category Cards */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 22px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(15, 76, 129, 0.3);
        }
        .related-card__icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background-color: var(--color-secondary-light);
            color: var(--color-secondary);
            font-size: 1.1rem;
            margin-bottom: 12px;
        }
        .related-card h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: var(--color-text-title);
        }
        .related-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .related-card a {
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-card a i {
            transition: transform var(--transition);
        }
        .related-card a:hover i {
            transform: translateX(4px);
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(15, 76, 129, 0.3);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-title);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 12px;
            transition: all var(--transition);
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background-color: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 13px;
            transition: transform var(--transition);
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
            background-color: var(--color-primary);
            color: var(--color-white);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
            border-top: 1px solid var(--color-border);
            padding-top: 14px;
        }

        /* CTA */
        .cta-box {
            background-color: var(--color-bg-dark);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(200, 164, 77, 0.15) 0%, transparent 65%);
            pointer-events: none;
        }
        .cta-box h2 {
            color: var(--color-white);
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.78);
            max-width: 540px;
            margin: 0 auto 28px;
            font-size: 15px;
            line-height: 1.8;
        }
        .cta-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            max-width: 520px;
            margin: 0 auto;
        }
        .cta-form input {
            flex: 1;
            min-width: 220px;
            padding: 14px 18px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--radius-sm);
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--color-white);
            font-size: 15px;
            outline: none;
            transition: all var(--transition);
        }
        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .cta-form input:focus {
            border-color: var(--color-gold);
            box-shadow: 0 0 0 3px rgba(200, 164, 77, 0.2);
        }

        /* Footer */
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            color: var(--color-white);
            font-size: 1.3rem;
            margin-bottom: 12px;
            display: inline-flex;
        }
        .footer-brand .logo__icon {
            background-color: var(--color-gold);
            color: var(--color-text-title);
        }
        .footer-brand .logo:hover {
            color: var(--color-gold);
        }
        .footer-brand__desc {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 260px;
            margin-bottom: 0;
        }
        .footer-col h3 {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 14px;
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }
        .footer-col__link {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 8px;
            transition: color var(--transition);
            line-height: 1.6;
        }
        .footer-col__link:hover {
            color: var(--color-gold);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: 22px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom__links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-bottom__links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 12px;
        }
        .footer-bottom__links a:hover {
            color: var(--color-white);
        }
        .footer-bottom__links span {
            color: rgba(255, 255, 255, 0.3);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-space: 56px;
            }
            .metric-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
                gap: 24px;
            }
            .category-hero__grid {
                gap: 28px;
            }
        }

        @media (max-width: 900px) {
            .main-nav__list {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .header-inner {
                flex-wrap: nowrap;
            }
            .main-nav.mobile-open .main-nav__list {
                display: flex;
                flex-direction: column;
                align-items: flex-start;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background-color: var(--color-white);
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-md);
                padding: 16px 24px;
                gap: 4px;
                z-index: 99;
            }
            .main-nav.mobile-open {
                display: block;
                flex: none;
            }
            .lang-switch {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .category-hero__grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .category-hero__image {
                aspect-ratio: 16/9;
            }
            .depth-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-space: 48px;
                --header-height: 60px;
                --gutter: 16px;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.45rem;
            }
            .category-hero__content h1 {
                font-size: 1.75rem;
            }
            .metric-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .cta-box {
                padding: 32px 22px;
            }
            .hero-form {
                flex-direction: column;
            }
            .hero-form input {
                min-width: auto;
                width: 100%;
            }
            .hero-form .btn {
                width: 100%;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form input {
                min-width: auto;
                width: 100%;
            }
            .cta-form .btn {
                width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .metric-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .breadcrumb {
                font-size: 12px;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #0F4C81;
            --color-primary-dark: #0A3A62;
            --color-primary-light: #EAF1F8;
            --color-secondary: #2E7D32;
            --color-secondary-light: #E8F5E9;
            --color-gold: #C8A44D;
            --color-gold-dark: #B8943A;
            --color-bg: #F7F9FC;
            --color-white: #FFFFFF;
            --color-bg-alt: #EEF2F7;
            --color-bg-dark: #0D2B45;
            --color-footer: #0B1F33;
            --color-text-title: #0B1F33;
            --color-text-body: #1C304A;
            --color-text-muted: #5B6B7C;
            --color-text-light: #8B98A8;
            --color-border: #E3E9F0;
            --color-focus: #C8A44D;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 4px 16px rgba(15, 76, 129, 0.06);
            --shadow-md: 0 10px 28px rgba(15, 76, 129, 0.12);
            --shadow-lg: 0 16px 40px rgba(15, 76, 129, 0.18);
            --transition: 0.25s ease;
            --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', 'Roboto', 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --gutter: 24px;
            --section-space: 88px;
            --section-space-mobile: 60px;
            --header-height: 76px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }

        a:hover {
            color: var(--color-primary-dark);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--color-text-title);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 0.5em;
        }

        h1 {
            font-size: 38px;
            letter-spacing: -0.01em;
        }

        h2 {
            font-size: 30px;
            letter-spacing: -0.005em;
        }

        h3 {
            font-size: 22px;
            font-weight: 600;
        }

        h4 {
            font-size: 18px;
            font-weight: 600;
        }

        p {
            margin-bottom: 1.2em;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding-left: var(--gutter);
            padding-right: var(--gutter);
        }

        .section {
            padding-top: var(--section-space);
            padding-bottom: var(--section-space);
        }

        .section--white {
            background-color: var(--color-white);
        }

        .section--alt {
            background-color: var(--color-bg-alt);
        }

        .section--dark {
            background-color: var(--color-bg-dark);
        }

        .section--footer {
            background-color: var(--color-footer);
        }

        .section__header {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section__tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-secondary);
            background-color: var(--color-secondary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .section__title {
            margin-bottom: 16px;
            color: var(--color-text-title);
        }

        .section__desc {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 0;
        }

        .section--dark .section__title,
        .section--footer .section__title {
            color: var(--color-white);
        }

        .section--dark .section__desc,
        .section--footer .section__desc {
            color: rgba(255, 255, 255, 0.75);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            min-height: 44px;
            text-decoration: none;
            white-space: nowrap;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 2px solid var(--color-focus);
            outline-offset: 3px;
        }

        .btn--primary {
            background-color: var(--color-primary);
            color: var(--color-white);
            border: 1px solid var(--color-primary);
        }

        .btn--primary:hover {
            background-color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn--primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn--secondary {
            background-color: var(--color-white);
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
        }

        .btn--secondary:hover {
            background-color: var(--color-primary-light);
            color: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn--gold {
            background-color: var(--color-gold);
            color: var(--color-text-title);
            border: 1px solid var(--color-gold);
        }

        .btn--gold:hover {
            background-color: var(--color-gold-dark);
            border-color: var(--color-gold-dark);
            color: var(--color-text-title);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn--sm {
            padding: 8px 18px;
            font-size: 14px;
            min-height: 36px;
        }

        .btn--lg {
            padding: 16px 36px;
            font-size: 16px;
            min-height: 52px;
        }

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            z-index: 1000;
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(15, 76, 129, 0.08);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text-title);
            text-decoration: none;
            flex-shrink: 0;
        }

        .logo__icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: var(--color-primary);
            color: var(--color-white);
            border-radius: 8px;
            font-size: 15px;
            font-weight: 700;
            letter-spacing: -0.02em;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
            justify-content: center;
        }

        .main-nav__list {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .main-nav__link {
            display: block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-body);
            text-decoration: none;
            border-radius: 6px;
            transition: all var(--transition);
            position: relative;
        }

        .main-nav__link:hover {
            color: var(--color-primary);
            background-color: var(--color-primary-light);
        }

        .main-nav__link.active {
            color: var(--color-primary);
            font-weight: 600;
            background-color: var(--color-primary-light);
        }

        .main-nav__link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 2px;
        }

        .lang-switch {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px;
            border: 1px solid var(--color-border);
            border-radius: 20px;
            height: 36px;
            background-color: var(--color-bg);
        }

        .lang-switch__item {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0 12px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: 16px;
            text-decoration: none;
            transition: all var(--transition);
            height: 28px;
            line-height: 1;
        }

        .lang-switch__item:hover {
            color: var(--color-text-body);
        }

        .lang-switch__item.active {
            background-color: var(--color-primary);
            color: var(--color-white);
            font-weight: 600;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 8px;
            background: none;
            border: 1px solid var(--color-border);
            border-radius: 6px;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--color-text-title);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
        }

        .breadcrumb .separator {
            color: var(--color-text-light);
        }

        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* Category Hero */
        .cat-hero {
            background-color: var(--color-primary-light);
            border-bottom: 1px solid var(--color-border);
            padding: 48px 0 56px;
        }

        .cat-hero__content {
            max-width: 720px;
        }

        .cat-hero__title {
            font-size: 38px;
            margin-bottom: 16px;
            color: var(--color-text-title);
        }

        .cat-hero__desc {
            font-size: 17px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 24px;
        }

        .cat-hero__img {
            width: 100%;
            height: 320px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            margin-top: 32px;
        }

        .cat-hero__img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Recovery Process */
        .recovery-process {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .recovery-process__step {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            position: relative;
        }

        .recovery-process__step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--color-primary);
        }

        .recovery-process__step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: var(--color-primary);
            color: var(--color-white);
            font-weight: 700;
            font-size: 16px;
            border-radius: 50%;
            margin-bottom: 16px;
        }

        .recovery-process__step h3 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--color-text-title);
        }

        .recovery-process__step p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* Scenario Cards */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .scenario-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--color-secondary);
        }

        .scenario-card__icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background-color: var(--color-secondary-light);
            color: var(--color-secondary);
            font-size: 22px;
            border-radius: 10px;
            margin-bottom: 16px;
        }

        .scenario-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--color-text-title);
        }

        .scenario-card p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* Metrics */
        .metrics-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .metric-item {
            text-align: center;
            padding: 24px 16px;
            background-color: var(--color-primary-light);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
        }

        .metric-item__value {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .metric-item__label {
            font-size: 14px;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* Article Blocks */
        .article-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 64px;
        }

        .article-block:last-child {
            margin-bottom: 0;
        }

        .article-block--reverse {
            direction: rtl;
        }

        .article-block--reverse>* {
            direction: ltr;
        }

        .article-block__img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 4/3;
        }

        .article-block__img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .article-block__text h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--color-text-title);
        }

        .article-block__text p {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .article-block__text strong {
            color: var(--color-text-title);
        }

        /* Checklist */
        .checklist {
            list-style: none;
            padding: 0;
            margin: 20px 0;
        }

        .checklist li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 16px;
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
            font-size: 15px;
            color: var(--color-text-body);
            transition: all var(--transition);
        }

        .checklist li:hover {
            border-color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
        }

        .checklist li i {
            color: var(--color-secondary);
            font-size: 16px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-left: 4px solid var(--color-primary);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }

        .faq-item__question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-title);
            user-select: none;
            transition: all var(--transition);
        }

        .faq-item__question:hover {
            background-color: var(--color-primary-light);
        }

        .faq-item__question i {
            font-size: 14px;
            color: var(--color-text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-item__question {
            background-color: var(--color-primary-light);
        }

        .faq-item.open .faq-item__question i {
            transform: rotate(180deg);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px;
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        .faq-item.open .faq-item__answer {
            max-height: 400px;
            padding: 0 20px 20px;
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--color-bg-dark);
            padding: 72px 0;
            text-align: center;
        }

        .cta-section h2 {
            color: var(--color-white);
            font-size: 32px;
            margin-bottom: 16px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 17px;
            max-width: 560px;
            margin: 0 auto 40px;
            line-height: 1.8;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 560px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form input[type="email"] {
            flex: 1;
            min-width: 260px;
            padding: 14px 20px;
            border: 2px solid transparent;
            border-radius: var(--radius-sm);
            font-size: 15px;
            background-color: var(--color-white);
            color: var(--color-text-body);
            transition: all var(--transition);
            outline: none;
        }

        .cta-form input[type="email"]:focus {
            border-color: var(--color-gold);
            box-shadow: 0 0 0 2px rgba(200, 164, 77, 0.3);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-footer);
            padding: 64px 0 0;
            font-size: 14px;
            color: var(--color-text-light);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: var(--color-white);
            margin-bottom: 16px;
        }

        .footer-brand__desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            max-width: 300px;
            margin-bottom: 0;
        }

        .footer-col__title {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-white);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 18px;
        }

        .footer-col__link {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            padding: 6px 0;
            font-size: 14px;
            transition: all var(--transition);
        }

        .footer-col__link:hover {
            color: var(--color-white);
            padding-left: 4px;
        }

        .footer-bottom {
            padding: 24px 0 32px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 40px;
        }

        .footer-bottom__links {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
        }

        .footer-bottom__links a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-bottom__links a:hover {
            color: var(--color-white);
        }

        .footer-bottom__links span {
            color: rgba(255, 255, 255, 0.3);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --header-height: 64px;
                --gutter: 20px;
                --section-space: 64px;
            }

            h1 {
                font-size: 32px;
            }

            h2 {
                font-size: 26px;
            }

            .recovery-process {
                grid-template-columns: repeat(2, 1fr);
            }

            .metrics-row {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --gutter: 16px;
                --section-space: 52px;
            }

            h1 {
                font-size: 28px;
            }

            h2 {
                font-size: 24px;
            }

            body {
                padding-top: var(--header-height);
            }

            .main-nav {
                display: none;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                bottom: 0;
                background-color: var(--color-white);
                flex-direction: column;
                padding: 24px;
                gap: 28px;
                align-items: stretch;
                overflow-y: auto;
                z-index: 999;
                border-top: 1px solid var(--color-border);
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav__list {
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
            }

            .main-nav__link {
                padding: 14px 16px;
                font-size: 16px;
            }

            .lang-switch {
                align-self: center;
            }

            .header-cta {
                margin-top: auto;
            }

            .nav-toggle {
                display: flex;
            }

            .cat-hero__title {
                font-size: 28px;
            }

            .cat-hero__desc {
                font-size: 15px;
            }

            .cat-hero__img {
                height: 220px;
            }

            .recovery-process {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .metrics-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .metric-item__value {
                font-size: 28px;
            }

            .article-block {
                grid-template-columns: 1fr;
                gap: 24px;
                margin-bottom: 48px;
            }

            .article-block--reverse {
                direction: ltr;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .footer-bottom__links {
                margin-left: 0;
                flex-wrap: wrap;
            }

            .cta-form {
                flex-direction: column;
            }

            .cta-form input[type="email"] {
                min-width: auto;
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .metrics-row {
                grid-template-columns: 1fr;
            }

            .btn--lg {
                padding: 14px 24px;
                font-size: 15px;
            }

            .section__header {
                margin-bottom: 32px;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #0F4C81;
            --color-primary-dark: #0A3A62;
            --color-primary-light: #EAF1F8;
            --color-secondary: #2E7D32;
            --color-secondary-light: #E8F5E9;
            --color-gold: #C8A44D;
            --color-gold-dark: #B8943A;
            --color-bg: #F7F9FC;
            --color-white: #FFFFFF;
            --color-bg-alt: #EEF2F7;
            --color-bg-dark: #0D2B45;
            --color-footer: #0B1F33;
            --color-text-title: #0B1F33;
            --color-text-body: #1C304A;
            --color-text-muted: #5B6B7C;
            --color-text-light: #8B98A8;
            --color-border: #E3E9F0;
            --color-focus: #C8A44D;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 4px 16px rgba(15, 76, 129, 0.06);
            --shadow-md: 0 10px 28px rgba(15, 76, 129, 0.12);
            --shadow-lg: 0 16px 40px rgba(15, 76, 129, 0.18);
            --transition: 0.25s ease;
            --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', 'Roboto', 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --gutter: 24px;
            --section-space: 80px;
            --section-space-mobile: 56px;
            --header-height: 76px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition), transform var(--transition);
        }
        a:hover {
            color: var(--color-primary-dark);
        }

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text-title);
        }
        h1 { font-size: 38px; }
        h2 { font-size: 30px; }
        h3 { font-size: 22px; }
        h4 { font-size: 18px; }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding-left: var(--gutter);
            padding-right: var(--gutter);
        }

        .section {
            padding-top: var(--section-space);
            padding-bottom: var(--section-space);
        }
        .section--white { background-color: var(--color-white); }
        .section--alt { background-color: var(--color-bg-alt); }
        .section--dark { background-color: var(--color-bg-dark); }
        .section--footer { background-color: var(--color-footer); }

        .section__header {
            max-width: 720px;
            margin-bottom: 48px;
        }
        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section__tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-secondary);
            background-color: var(--color-secondary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }
        .section__title {
            margin-bottom: 16px;
            color: var(--color-text-title);
        }
        .section__desc {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 0;
        }
        .section--dark .section__title,
        .section--footer .section__title {
            color: var(--color-white);
        }
        .section--dark .section__desc,
        .section--footer .section__desc {
            color: rgba(255, 255, 255, 0.75);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            min-height: 44px;
            text-decoration: none;
            white-space: nowrap;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-focus);
            outline-offset: 3px;
        }
        .btn--primary {
            background-color: var(--color-primary);
            color: var(--color-white);
            border: 1px solid var(--color-primary);
        }
        .btn--primary:hover {
            background-color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn--secondary {
            background-color: var(--color-white);
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
        }
        .btn--secondary:hover {
            background-color: var(--color-primary-light);
            color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
        }
        .btn--gold {
            background-color: var(--color-gold);
            color: var(--color-text-title);
            border: 1px solid var(--color-gold);
        }
        .btn--gold:hover {
            background-color: var(--color-gold-dark);
            border-color: var(--color-gold-dark);
            color: var(--color-text-title);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .btn--sm {
            padding: 8px 20px;
            font-size: 14px;
            min-height: 36px;
        }
        .btn--lg {
            padding: 16px 36px;
            font-size: 16px;
            min-height: 52px;
        }

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text-title);
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--color-primary);
        }
        .logo__icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: var(--color-primary);
            color: var(--color-white);
            font-size: 14px;
            font-weight: 700;
            border-radius: var(--radius-sm);
            letter-spacing: -0.02em;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
            justify-content: center;
        }
        .main-nav__list {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 8px;
            margin: 0;
            padding: 0;
        }
        .main-nav__link {
            display: inline-block;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-body);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .main-nav__link:hover {
            color: var(--color-primary);
            background-color: var(--color-primary-light);
        }
        .main-nav__link.active {
            color: var(--color-primary);
            background-color: var(--color-primary-light);
            font-weight: 600;
        }
        .main-nav__link.active::after {
            content: '';
            display: block;
            width: 100%;
            height: 2px;
            background-color: var(--color-primary);
            margin-top: 2px;
            border-radius: 1px;
        }
        .lang-switch {
            display: inline-flex;
            align-items: center;
            gap: 0;
            border: 1px solid var(--color-border);
            border-radius: 20px;
            padding: 2px;
            flex-shrink: 0;
        }
        .lang-switch__item {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 18px;
            color: var(--color-text-muted);
            transition: all var(--transition);
        }
        .lang-switch__item:hover {
            color: var(--color-primary);
        }
        .lang-switch__item.active {
            background-color: var(--color-primary);
            color: var(--color-white);
        }
        .header-cta {
            flex-shrink: 0;
        }
        .header-cta .btn {
            min-height: 38px;
            padding: 8px 18px;
            font-size: 14px;
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--color-text-title);
            border-radius: 1px;
            transition: all var(--transition);
        }

        /* Breadcrumb */
        .breadcrumb-section {
            padding-top: calc(var(--header-height) + 32px);
            padding-bottom: 0;
            background-color: var(--color-bg);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-muted);
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb li + li::before {
            content: '/';
            color: var(--color-text-light);
            margin-right: 8px;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* Category Hero */
        .category-hero {
            padding-top: 40px;
            padding-bottom: 56px;
            background-color: var(--color-bg);
        }
        .category-hero .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .category-hero__content h1 {
            font-size: 40px;
            margin-bottom: 20px;
            color: var(--color-text-title);
        }
        .category-hero__content h1 .highlight {
            color: var(--color-primary);
            border-bottom: 3px solid var(--color-gold);
            display: inline-block;
            line-height: 1.2;
        }
        .category-hero__desc {
            font-size: 17px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 28px;
        }
        .category-hero__actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .category-hero__image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .category-hero__image img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        .category-hero__badge {
            position: absolute;
            top: 20px;
            right: 20px;
            background-color: var(--color-gold);
            color: var(--color-text-title);
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 20px;
        }

        /* Review Cards */
        .review-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .review-card {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 28px;
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .review-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: #D0DCE8;
        }
        .review-card__image {
            border-radius: var(--radius-sm);
            overflow: hidden;
            height: 100%;
            min-height: 180px;
            background-color: var(--color-bg-alt);
        }
        .review-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 1/1;
        }
        .review-card__body {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .review-card__meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .review-card__tag {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background-color: var(--color-primary-light);
            padding: 3px 12px;
            border-radius: 14px;
        }
        .review-card__date {
            font-size: 13px;
            color: var(--color-text-light);
        }
        .review-card__title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--color-text-title);
        }
        .review-card__summary {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .review-card__score {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .score-item {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--color-text-muted);
        }
        .score-item i {
            color: var(--color-gold);
            font-size: 14px;
        }
        .score-item .score-value {
            font-weight: 700;
            color: var(--color-text-title);
            font-size: 16px;
        }
        .review-card__action {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        /* Methodology */
        .methodology-list {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }
        .methodology-item {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .methodology-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--color-primary);
        }
        .methodology-item__icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            background-color: var(--color-primary-light);
            color: var(--color-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
        }
        .methodology-item h4 {
            font-size: 16px;
            margin-bottom: 8px;
        }
        .methodology-item p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* Top Picks */
        .picks-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .pick-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .pick-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .pick-card__image {
            position: relative;
            height: 200px;
            background-color: var(--color-bg-alt);
            overflow: hidden;
        }
        .pick-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .pick-card__rank {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: var(--color-primary);
            color: var(--color-white);
            font-size: 13px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 14px;
        }
        .pick-card__body {
            padding: 20px 24px 24px;
        }
        .pick-card__body h3 {
            font-size: 17px;
            margin-bottom: 8px;
        }
        .pick-card__body p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .pick-card__score {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            color: var(--color-gold);
        }
        .pick-card__score span {
            color: var(--color-text-muted);
            margin-right: 8px;
        }

        /* Buying Guide Steps */
        .steps-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-primary-light);
        }
        .step-item__number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: var(--color-primary);
            color: var(--color-white);
            font-size: 16px;
            font-weight: 700;
            border-radius: 50%;
            margin-bottom: 16px;
        }
        .step-item h4 {
            font-size: 16px;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }
        .testimonial-card__stars {
            color: var(--color-gold);
            font-size: 15px;
            margin-bottom: 12px;
        }
        .testimonial-card__text {
            font-size: 15px;
            color: var(--color-text-body);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .testimonial-card__author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-card__avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 16px;
            font-weight: 700;
        }
        .testimonial-card__name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-title);
        }
        .testimonial-card__meta {
            font-size: 13px;
            color: var(--color-text-light);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item.open {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }
        .faq-item__question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-title);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            border-left: 4px solid transparent;
            transition: all var(--transition);
        }
        .faq-item__question:hover {
            background-color: var(--color-primary-light);
        }
        .faq-item.open .faq-item__question {
            border-left-color: var(--color-primary);
            background-color: var(--color-primary-light);
        }
        .faq-item__question i {
            font-size: 14px;
            color: var(--color-text-muted);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-item__question i {
            transform: rotate(180deg);
            color: var(--color-primary);
        }
        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
            padding: 0 24px;
        }
        .faq-item.open .faq-item__answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-item__answer p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--color-bg-dark);
            padding-top: var(--section-space);
            padding-bottom: var(--section-space);
        }
        .cta-section .container {
            text-align: center;
        }
        .cta-section h2 {
            color: var(--color-white);
            margin-bottom: 16px;
            font-size: 32px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-form input[type="email"] {
            flex: 1;
            min-width: 260px;
            padding: 14px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            background-color: var(--color-white);
            font-size: 15px;
            color: var(--color-text-body);
            outline: none;
            transition: all var(--transition);
        }
        .cta-form input[type="email"]:focus {
            border-color: var(--color-gold);
            box-shadow: 0 0 0 3px rgba(200, 164, 77, 0.3);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-footer);
            color: var(--color-text-light);
            padding-top: 56px;
            padding-bottom: 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: var(--color-white);
            margin-bottom: 16px;
        }
        .footer-brand .logo:hover {
            color: var(--color-gold);
        }
        .footer-brand__desc {
            font-size: 14px;
            color: var(--color-text-light);
            line-height: 1.8;
        }
        .footer-col__title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 16px;
        }
        .footer-col__link {
            display: block;
            font-size: 14px;
            color: var(--color-text-light);
            margin-bottom: 10px;
            transition: color var(--transition);
        }
        .footer-col__link:hover {
            color: var(--color-white);
        }
        .footer-bottom {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            font-size: 13px;
            color: var(--color-text-light);
        }
        .footer-bottom__links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .footer-bottom__links a {
            color: var(--color-text-light);
            font-size: 13px;
        }
        .footer-bottom__links a:hover {
            color: var(--color-white);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
            .methodology-list { grid-template-columns: repeat(3, 1fr); }
            .picks-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-flow { grid-template-columns: repeat(2, 1fr); }
            .category-hero .container { grid-template-columns: 1fr; }
            .category-hero__image { max-height: 320px; }
            .review-card { grid-template-columns: 220px 1fr; }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --section-space: 56px;
                --gutter: 16px;
            }
            h1 { font-size: 28px; }
            h2 { font-size: 24px; }
            h3 { font-size: 20px; }

            .mobile-toggle {
                display: flex;
            }
            .main-nav {
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background-color: var(--color-white);
                border-bottom: 1px solid var(--color-border);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 12px;
                display: none;
                box-shadow: var(--shadow-md);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav__list {
                flex-direction: column;
                width: 100%;
                gap: 4px;
            }
            .main-nav__link {
                display: block;
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }
            .lang-switch {
                align-self: flex-start;
            }
            .header-cta {
                width: 100%;
            }
            .header-cta .btn {
                width: 100%;
                justify-content: center;
            }

            .section {
                padding-top: var(--section-space);
                padding-bottom: var(--section-space);
            }
            .section__header {
                margin-bottom: 32px;
            }
            .section__title {
                font-size: 24px;
            }

            .category-hero { padding-top: 24px; }
            .category-hero__content h1 { font-size: 28px; }
            .category-hero .container { gap: 24px; }

            .review-card { grid-template-columns: 1fr; }
            .review-card__image { min-height: 200px; }

            .methodology-list { grid-template-columns: 1fr 1fr; gap: 14px; }
            .methodology-item { padding: 18px 14px; }

            .picks-grid { grid-template-columns: 1fr; }
            .steps-flow { grid-template-columns: 1fr; }
            .testimonial-grid { grid-template-columns: 1fr; }

            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; align-items: flex-start; }
        }

        @media (max-width: 520px) {
            .category-hero__actions { flex-direction: column; }
            .category-hero__actions .btn { width: 100%; }
            .cta-form { flex-direction: column; }
            .cta-form input[type="email"] { width: 100%; min-width: 0; }
            .cta-form .btn { width: 100%; }
            .methodology-list { grid-template-columns: 1fr; }
            .review-card__score { flex-direction: column; align-items: flex-start; gap: 8px; }
            .review-card__action { flex-direction: column; align-items: flex-start; }
        }

        /* Accessibility skip link */
        .skip-link {
            position: absolute;
            top: -100px;
            left: 16px;
            background-color: var(--color-primary);
            color: var(--color-white);
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            z-index: 2000;
            transition: top var(--transition);
        }
        .skip-link:focus {
            top: 16px;
            color: var(--color-white);
        }

/* roulang page: category6 */
:root {
        --color-primary: #0F4C81;
        --color-primary-dark: #0A3A62;
        --color-primary-light: #EAF1F8;
        --color-secondary: #2E7D32;
        --color-secondary-light: #E8F5E9;
        --color-gold: #C8A44D;
        --color-gold-dark: #B8943A;
        --color-bg: #F7F9FC;
        --color-white: #FFFFFF;
        --color-bg-alt: #EEF2F7;
        --color-bg-dark: #0D2B45;
        --color-footer: #0B1F33;
        --color-text-title: #0B1F33;
        --color-text-body: #1C304A;
        --color-text-muted: #5B6B7C;
        --color-text-light: #8B98A8;
        --color-border: #E3E9F0;
        --color-focus: #C8A44D;
        --radius-sm: 8px;
        --radius-md: 12px;
        --radius-lg: 16px;
        --shadow-sm: 0 4px 16px rgba(15, 76, 129, 0.06);
        --shadow-md: 0 10px 28px rgba(15, 76, 129, 0.12);
        --shadow-lg: 0 16px 40px rgba(15, 76, 129, 0.18);
        --transition: 0.25s ease;
        --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', 'Roboto', 'Helvetica Neue', sans-serif;
        --container: 1200px;
        --gutter: 24px;
        --section-space: 88px;
        --section-space-mobile: 60px;
        --header-height: 76px;
    }

    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
        text-size-adjust: 100%;
    }

    *, *::before, *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.85;
        color: var(--color-text-body);
        background-color: var(--color-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
        border: 0;
    }

    a {
        color: var(--color-primary);
        text-decoration: none;
        transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
    }
    a:hover {
        color: var(--color-primary-dark);
    }

    button, input, select, textarea {
        font-family: inherit;
        font-size: inherit;
        line-height: inherit;
        color: inherit;
    }
    button {
        cursor: pointer;
        border: none;
        background: none;
    }

    .container {
        width: 100%;
        max-width: var(--container);
        margin: 0 auto;
        padding-left: var(--gutter);
        padding-right: var(--gutter);
    }

    .section {
        padding-top: var(--section-space);
        padding-bottom: var(--section-space);
    }
    .section--white { background-color: var(--color-white); }
    .section--alt { background-color: var(--color-bg-alt); }
    .section--dark { background-color: var(--color-bg-dark); }
    .section--footer { background-color: var(--color-footer); }

    .section__header {
        max-width: 680px;
        margin-bottom: 48px;
    }
    .section__header--center {
        margin-left: auto;
        margin-right: auto;
        text-align: center;
    }
    .section__tag {
        display: inline-block;
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--color-secondary);
        background-color: var(--color-secondary-light);
        padding: 4px 14px;
        border-radius: 20px;
        margin-bottom: 16px;
    }
    .section__title {
        font-size: 2.25rem;
        font-weight: 700;
        line-height: 1.35;
        margin-bottom: 16px;
        color: var(--color-text-title);
    }
    .section__desc {
        font-size: 16px;
        color: var(--color-text-muted);
        line-height: 1.9;
        margin-bottom: 0;
    }
    .section--dark .section__title,
    .section--footer .section__title { color: var(--color-white); }
    .section--dark .section__desc,
    .section--footer .section__desc { color: rgba(255, 255, 255, 0.75); }
    .section--dark .section__tag { background-color: rgba(200, 164, 77, 0.15); color: var(--color-gold); }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-size: 15px;
        font-weight: 600;
        padding: 12px 28px;
        border-radius: var(--radius-sm);
        transition: all var(--transition);
        min-height: 44px;
        text-decoration: none;
        white-space: nowrap;
        line-height: 1.4;
    }
    .btn:focus-visible {
        outline: 2px solid var(--color-focus);
        outline-offset: 3px;
    }
    .btn--primary {
        background-color: var(--color-primary);
        color: var(--color-white);
        border: 1px solid var(--color-primary);
    }
    .btn--primary:hover {
        background-color: var(--color-primary-dark);
        border-color: var(--color-primary-dark);
        color: var(--color-white);
        transform: translateY(-2px);
        box-shadow: var(--shadow-sm);
    }
    .btn--primary:active { transform: translateY(0); box-shadow: none; }
    .btn--secondary {
        background-color: var(--color-white);
        color: var(--color-primary);
        border: 1px solid var(--color-primary);
    }
    .btn--secondary:hover {
        background-color: var(--color-primary-light);
        color: var(--color-primary-dark);
        border-color: var(--color-primary);
        transform: translateY(-2px);
    }
    .btn--gold {
        background-color: var(--color-gold);
        color: var(--color-text-title);
        border: 1px solid var(--color-gold);
    }
    .btn--gold:hover {
        background-color: var(--color-gold-dark);
        border-color: var(--color-gold-dark);
        color: var(--color-text-title);
        transform: translateY(-2px);
        box-shadow: var(--shadow-sm);
    }
    .btn--sm {
        padding: 8px 18px;
        font-size: 14px;
        min-height: 36px;
    }

    /* Header */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background-color: var(--color-white);
        border-bottom: 1px solid var(--color-border);
        height: var(--header-height);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: var(--header-height);
        gap: 20px;
    }
    .logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--color-text-title);
        line-height: 1;
    }
    .logo__icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        background-color: var(--color-primary);
        color: var(--color-white);
        border-radius: 10px;
        font-size: 16px;
        font-weight: 800;
        letter-spacing: 0.03em;
    }
    .logo:hover { color: var(--color-text-title); }

    .main-nav__list {
        display: flex;
        align-items: center;
        gap: 6px;
        list-style: none;
    }
    .main-nav__link {
        display: inline-block;
        padding: 8px 14px;
        font-size: 15px;
        font-weight: 500;
        color: var(--color-text-body);
        border-radius: var(--radius-sm);
        transition: all var(--transition);
        white-space: nowrap;
    }
    .main-nav__link:hover {
        color: var(--color-primary);
        background-color: var(--color-primary-light);
    }
    .main-nav__link.active {
        color: var(--color-primary);
        background-color: var(--color-primary-light);
        font-weight: 600;
    }
    .lang-switch {
        display: inline-flex;
        align-items: center;
        height: 36px;
        border: 1px solid var(--color-border);
        border-radius: 20px;
        padding: 2px;
        background-color: var(--color-bg);
    }
    .lang-switch__item {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        height: 30px;
        padding: 0 14px;
        font-size: 14px;
        font-weight: 500;
        color: var(--color-text-muted);
        border-radius: 18px;
        transition: all var(--transition);
    }
    .lang-switch__item.active {
        background-color: var(--color-primary);
        color: var(--color-white);
    }
    .lang-switch__item:not(.active):hover {
        color: var(--color-primary);
        background-color: var(--color-primary-light);
    }
    .header-cta {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        width: 44px;
        height: 44px;
        background: none;
        border: none;
        padding: 8px;
        cursor: pointer;
    }
    .nav-toggle span {
        display: block;
        width: 100%;
        height: 2px;
        background-color: var(--color-text-title);
        border-radius: 2px;
        transition: all var(--transition);
    }

    /* Hero */
    .hero {
        background: linear-gradient(180deg, var(--color-white) 0%, var(--color-bg) 100%);
        padding: 72px 0 64px;
        border-bottom: 1px solid var(--color-border);
    }
    .hero-inner {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        align-items: center;
    }
    .hero__title {
        font-size: 2.75rem;
        font-weight: 800;
        line-height: 1.3;
        color: var(--color-text-title);
        margin-bottom: 20px;
    }
    .hero__subtitle {
        font-size: 18px;
        color: var(--color-text-muted);
        line-height: 1.9;
        margin-bottom: 28px;
        max-width: 540px;
    }
    .hero__actions {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
        margin-bottom: 24px;
    }
    .hero-icon-matrix {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }
    .hero-icon-item {
        background-color: var(--color-white);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: 18px 16px;
        display: flex;
        align-items: center;
        gap: 12px;
        box-shadow: var(--shadow-sm);
        transition: all var(--transition);
    }
    .hero-icon-item:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-2px);
        border-color: #d0dce6;
    }
    .hero-icon-item i {
        font-size: 1.8rem;
        color: var(--color-primary);
        width: 40px;
        text-align: center;
    }
    .hero-icon-item span {
        font-size: 15px;
        font-weight: 600;
        color: var(--color-text-body);
    }
    .hero-status-bar {
        background-color: var(--color-white);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: 22px 24px;
        box-shadow: var(--shadow-sm);
    }
    .hero-status-bar__title {
        font-size: 14px;
        font-weight: 600;
        color: var(--color-text-muted);
        margin-bottom: 14px;
        letter-spacing: 0.04em;
    }
    .hero-status-bar__list {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .hero-status-bar__item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 15px;
        color: var(--color-text-body);
    }
    .hero-status-bar__item strong {
        font-size: 18px;
        font-weight: 700;
        color: var(--color-primary);
    }
    .hero-status-bar__item .fa-arrow-up {
        color: var(--color-secondary);
        margin-left: 6px;
        font-size: 13px;
    }

    /* Pain point section */
    .pain-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        margin-top: 32px;
    }
    .pain-card {
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: var(--radius-md);
        padding: 24px 20px;
        text-align: center;
        color: var(--color-white);
    }
    .pain-card i {
        font-size: 2rem;
        margin-bottom: 14px;
        color: var(--color-gold);
    }
    .pain-card h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 10px;
        color: var(--color-white);
    }
    .pain-card p {
        font-size: 15px;
        line-height: 1.8;
        color: rgba(255, 255, 255, 0.75);
    }

    /* Solution steps */
    .steps-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        margin-top: 32px;
    }
    .step-card {
        background-color: var(--color-white);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: 28px 22px;
        box-shadow: var(--shadow-sm);
        transition: all var(--transition);
        position: relative;
    }
    .step-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-3px);
    }
    .step-card__num {
        font-size: 2.5rem;
        font-weight: 800;
        color: var(--color-primary-light);
        line-height: 1;
        margin-bottom: 14px;
        display: block;
    }
    .step-card h3 {
        font-size: 19px;
        font-weight: 700;
        color: var(--color-text-title);
        margin-bottom: 10px;
    }
    .step-card p {
        font-size: 15px;
        color: var(--color-text-muted);
        line-height: 1.85;
    }

    /* Results data cards */
    .data-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        margin-top: 32px;
    }
    .data-card {
        background-color: var(--color-white);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: 24px 20px;
        text-align: center;
        box-shadow: var(--shadow-sm);
    }
    .data-card .data-number {
        font-size: 2rem;
        font-weight: 800;
        color: var(--color-primary);
        line-height: 1.2;
    }
    .data-card .data-label {
        font-size: 14px;
        color: var(--color-text-muted);
        margin-top: 6px;
    }
    .data-card .data-trend {
        display: inline-block;
        font-size: 12px;
        font-weight: 600;
        color: var(--color-secondary);
        background-color: var(--color-secondary-light);
        padding: 2px 8px;
        border-radius: 12px;
        margin-top: 8px;
    }

    /* Venue cards */
    .venue-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
        margin-top: 32px;
    }
    .venue-card {
        background-color: var(--color-white);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: all var(--transition);
        display: flex;
        flex-direction: column;
    }
    .venue-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-3px);
    }
    .venue-card img {
        width: 100%;
        height: 220px;
        object-fit: cover;
    }
    .venue-card__body {
        padding: 22px 24px 24px;
        display: flex;
        flex-direction: column;
        flex: 1;
    }
    .venue-card__title {
        font-size: 20px;
        font-weight: 700;
        color: var(--color-text-title);
        margin-bottom: 10px;
    }
    .venue-card__meta {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-bottom: 12px;
    }
    .venue-card__meta span {
        font-size: 13px;
        color: var(--color-text-muted);
        background-color: var(--color-bg-alt);
        padding: 4px 12px;
        border-radius: 14px;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .venue-card__desc {
        font-size: 15px;
        color: var(--color-text-muted);
        line-height: 1.85;
        margin-bottom: 16px;
    }
    .venue-card__actions {
        margin-top: auto;
        display: flex;
        gap: 10px;
    }

    /* Activity timeline */
    .activity-list {
        margin-top: 32px;
        display: flex;
        flex-direction: column;
        gap: 18px;
    }
    .activity-item {
        background-color: var(--color-white);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: 20px 24px;
        display: grid;
        grid-template-columns: 90px 1fr auto;
        gap: 18px;
        align-items: center;
        box-shadow: var(--shadow-sm);
        transition: all var(--transition);
    }
    .activity-item:hover {
        box-shadow: var(--shadow-md);
    }
    .activity-item__date {
        text-align: center;
        font-weight: 700;
        color: var(--color-primary);
        line-height: 1.4;
    }
    .activity-item__date .month {
        display: block;
        font-size: 14px;
        font-weight: 600;
        color: var(--color-text-muted);
    }
    .activity-item__date .day {
        font-size: 24px;
    }
    .activity-item__info h4 {
        font-size: 18px;
        font-weight: 600;
        color: var(--color-text-title);
        margin-bottom: 6px;
    }
    .activity-item__info p {
        font-size: 14px;
        color: var(--color-text-muted);
    }
    .activity-item .btn {
        white-space: nowrap;
    }

    /* Testimonials */
    .testimonial-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
        margin-top: 32px;
    }
    .testimonial-card {
        background-color: var(--color-white);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: 24px;
        box-shadow: var(--shadow-sm);
    }
    .testimonial-card__text {
        font-size: 15px;
        line-height: 1.85;
        color: var(--color-text-body);
        margin-bottom: 16px;
        position: relative;
        padding-left: 18px;
    }
    .testimonial-card__text::before {
        content: "“";
        position: absolute;
        left: 0;
        top: -2px;
        font-size: 28px;
        color: var(--color-gold);
        font-weight: 700;
    }
    .testimonial-card__author {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        color: var(--color-text-muted);
    }
    .testimonial-card__avatar {
        width: 38px;
        height: 38px;
        border-radius: 50%;
        background-color: var(--color-primary-light);
        color: var(--color-primary);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        font-size: 15px;
    }

    /* FAQ */
    .faq-list {
        max-width: 800px;
        margin: 32px auto 0;
    }
    .faq-item {
        background-color: var(--color-white);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        margin-bottom: 14px;
        overflow: hidden;
        box-shadow: var(--shadow-sm);
    }
    .faq-item__question {
        padding: 18px 24px;
        font-size: 16px;
        font-weight: 600;
        color: var(--color-text-title);
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: space-between;
        background-color: var(--color-white);
        border-left: 4px solid var(--color-primary);
        transition: all var(--transition);
    }
    .faq-item__question:hover {
        background-color: var(--color-primary-light);
    }
    .faq-item__question i {
        transition: transform var(--transition);
        color: var(--color-primary);
    }
    .faq-item.open .faq-item__question i {
        transform: rotate(180deg);
    }
    .faq-item__answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition), padding var(--transition);
        background-color: var(--color-white);
        padding: 0 24px;
    }
    .faq-item.open .faq-item__answer {
        max-height: 400px;
        padding: 0 24px 20px;
    }
    .faq-item__answer p {
        font-size: 15px;
        color: var(--color-text-muted);
        line-height: 1.85;
        padding-top: 12px;
    }

    /* CTA */
    .cta-inner {
        text-align: center;
        max-width: 720px;
        margin: 0 auto;
    }
    .cta-inner .section__title {
        color: var(--color-white);
        margin-bottom: 16px;
    }
    .cta-inner .section__desc {
        color: rgba(255, 255, 255, 0.75);
        margin-bottom: 28px;
    }
    .cta-form {
        display: flex;
        gap: 12px;
        max-width: 520px;
        margin: 0 auto;
    }
    .cta-form input[type="email"] {
        flex: 1;
        padding: 12px 18px;
        border-radius: var(--radius-sm);
        border: 1px solid transparent;
        font-size: 15px;
        background-color: var(--color-white);
        color: var(--color-text-body);
        min-height: 48px;
    }
    .cta-form input[type="email"]:focus {
        outline: none;
        border-color: var(--color-gold);
        box-shadow: 0 0 0 2px rgba(200, 164, 77, 0.35);
    }

    /* Footer */
    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr 1fr 1.3fr;
        gap: 32px;
        padding: 56px 0 40px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand .logo {
        color: var(--color-white);
        margin-bottom: 16px;
    }
    .footer-brand .logo:hover { color: var(--color-white); }
    .footer-brand__desc {
        font-size: 14px;
        line-height: 1.8;
        color: var(--color-text-light);
        max-width: 280px;
    }
    .footer-col__title {
        font-size: 15px;
        font-weight: 600;
        color: var(--color-white);
        margin-bottom: 16px;
    }
    .footer-col__link {
        display: block;
        font-size: 14px;
        color: var(--color-text-light);
        margin-bottom: 10px;
        transition: color var(--transition);
    }
    .footer-col__link:hover {
        color: var(--color-white);
    }
    .footer-bottom {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 16px;
        padding: 20px 0;
        font-size: 13px;
        color: var(--color-text-light);
    }
    .footer-bottom__links {
        margin-left: auto;
        display: flex;
        gap: 10px;
        align-items: center;
    }
    .footer-bottom__links a {
        color: var(--color-text-light);
        font-size: 13px;
    }
    .footer-bottom__links a:hover {
        color: var(--color-white);
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .hero-inner { grid-template-columns: 1fr; }
        .hero__title { font-size: 2.25rem; }
        .data-grid { grid-template-columns: repeat(2, 1fr); }
        .testimonial-grid { grid-template-columns: 1fr 1fr; }
        .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
    }
    @media (max-width: 768px) {
        :root {
            --header-height: 64px;
            --gutter: 16px;
            --section-space: 52px;
        }
        .header-inner { flex-wrap: wrap; }
        .main-nav {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            padding: 16px 24px;
            z-index: 100;
        }
        .main-nav.open { display: block; }
        .main-nav__list {
            flex-direction: column;
            gap: 4px;
        }
        .main-nav__link {
            display: block;
            padding: 10px 14px;
            font-size: 16px;
        }
        .lang-switch { display: none; }
        .header-cta { display: none; }
        .nav-toggle { display: flex; }
        .hero { padding: 48px 0 40px; }
        .hero__title { font-size: 1.9rem; }
        .hero-icon-matrix { grid-template-columns: 1fr 1fr; }
        .pain-grid { grid-template-columns: 1fr; }
        .steps-grid { grid-template-columns: 1fr; }
        .venue-grid { grid-template-columns: 1fr; }
        .activity-item { grid-template-columns: 1fr; text-align: center; }
        .activity-item .btn { justify-content: center; }
        .testimonial-grid { grid-template-columns: 1fr; }
        .data-grid { grid-template-columns: 1fr 1fr; }
        .cta-form { flex-direction: column; }
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
        .footer-bottom { flex-direction: column; align-items: flex-start; }
        .footer-bottom__links { margin-left: 0; }
        .footer-brand { grid-column: 1 / -1; }
    }
    @media (max-width: 520px) {
        .hero-icon-matrix { grid-template-columns: 1fr; }
        .data-grid { grid-template-columns: 1fr; }
        .footer-grid { grid-template-columns: 1fr; }
        .section__title { font-size: 1.8rem; }
        .hero__title { font-size: 1.7rem; }
    }

/* roulang page: category5 */
:root {
            --color-primary: #0F4C81;
            --color-primary-dark: #0A3A62;
            --color-primary-light: #EAF1F8;
            --color-secondary: #2E7D32;
            --color-secondary-light: #E8F5E9;
            --color-gold: #C8A44D;
            --color-gold-dark: #B8943A;
            --color-bg: #F7F9FC;
            --color-white: #FFFFFF;
            --color-bg-alt: #EEF2F7;
            --color-bg-dark: #0D2B45;
            --color-footer: #0B1F33;
            --color-text-title: #0B1F33;
            --color-text-body: #1C304A;
            --color-text-muted: #5B6B7C;
            --color-text-light: #8B98A8;
            --color-border: #E3E9F0;
            --color-focus: #C8A44D;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 4px 16px rgba(15, 76, 129, 0.06);
            --shadow-md: 0 10px 28px rgba(15, 76, 129, 0.12);
            --shadow-lg: 0 16px 40px rgba(15, 76, 129, 0.18);
            --transition: 0.25s ease;
            --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', 'Roboto', 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --gutter: 24px;
            --section-space: 80px;
            --section-space-mobile: 56px;
            --header-height: 76px;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0 0 16px 0;
            font-weight: 700;
            line-height: 1.45;
            color: var(--color-text-title);
        }
        h1 {
            font-size: 38px;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        h2 {
            font-size: 30px;
            font-weight: 700;
        }
        h3 {
            font-size: 22px;
            font-weight: 600;
        }
        h4 {
            font-size: 18px;
            font-weight: 600;
        }
        p {
            margin: 0 0 16px 0;
        }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding-left: var(--gutter);
            padding-right: var(--gutter);
        }
        .section {
            padding-top: var(--section-space);
            padding-bottom: var(--section-space);
        }
        .section--white {
            background-color: var(--color-white);
        }
        .section--alt {
            background-color: var(--color-bg-alt);
        }
        .section--dark {
            background-color: var(--color-bg-dark);
        }
        .section--footer {
            background-color: var(--color-footer);
        }
        .section__header {
            max-width: 680px;
            margin-bottom: 40px;
        }
        .section__header--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section__tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-secondary);
            background-color: var(--color-secondary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }
        .section__title {
            margin-bottom: 16px;
            color: var(--color-text-title);
        }
        .section__desc {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 0;
        }
        .section--dark .section__title,
        .section--footer .section__title {
            color: var(--color-white);
        }
        .section--dark .section__desc,
        .section--footer .section__desc {
            color: rgba(255, 255, 255, 0.75);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            min-height: 44px;
            text-decoration: none;
            white-space: nowrap;
            line-height: 1.4;
            border: 1px solid transparent;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-focus);
            outline-offset: 3px;
        }
        .btn--primary {
            background-color: var(--color-primary);
            color: var(--color-white);
            border-color: var(--color-primary);
        }
        .btn--primary:hover {
            background-color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn--secondary {
            background-color: var(--color-white);
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
        }
        .btn--secondary:hover {
            background-color: var(--color-primary-light);
            color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
        }
        .btn--gold {
            background-color: var(--color-gold);
            color: var(--color-text-title);
            border-color: var(--color-gold);
        }
        .btn--gold:hover {
            background-color: var(--color-gold-dark);
            border-color: var(--color-gold-dark);
            color: var(--color-text-title);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .btn--sm {
            padding: 8px 18px;
            font-size: 14px;
            min-height: 38px;
        }
        .btn--lg {
            padding: 14px 34px;
            font-size: 16px;
            min-height: 52px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 100%;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 22px;
            color: var(--color-text-title);
            white-space: nowrap;
        }
        .logo:hover {
            color: var(--color-primary);
        }
        .logo__icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 700;
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 24px;
            flex: 1;
            justify-content: center;
        }
        .main-nav__list {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .main-nav__link {
            display: inline-block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .main-nav__link:hover {
            color: var(--color-primary);
            background-color: var(--color-primary-light);
        }
        .main-nav__link.active {
            color: var(--color-primary);
            font-weight: 600;
            background-color: var(--color-primary-light);
        }
        .lang-switch {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px;
            border: 1px solid var(--color-border);
            border-radius: 20px;
            height: 38px;
            background-color: var(--color-bg);
        }
        .lang-switch__item {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0 14px;
            height: 28px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text-muted);
            border-radius: 16px;
            white-space: nowrap;
        }
        .lang-switch__item:hover {
            color: var(--color-primary);
        }
        .lang-switch__item.active {
            background-color: var(--color-primary);
            color: var(--color-white);
        }
        .header-cta {
            display: flex;
            align-items: center;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--color-text-title);
            border-radius: 2px;
            transition: transform var(--transition);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            padding: 14px 0;
        }
        .breadcrumb-bar .breadcrumb {
            margin: 0;
            font-size: 14px;
        }
        .breadcrumb-bar .breadcrumb-item a {
            color: var(--color-text-muted);
        }
        .breadcrumb-bar .breadcrumb-item a:hover {
            color: var(--color-primary);
        }
        .breadcrumb-bar .breadcrumb-item.active {
            color: var(--color-text-body);
            font-weight: 500;
        }

        /* Hero - Coupon Wall */
        .hero-coupon {
            background: linear-gradient(165deg, #F7F9FC 0%, #EAF1F8 45%, #E3EDF6 100%);
            padding: 56px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .hero-coupon::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: rgba(15, 76, 129, 0.05);
            pointer-events: none;
        }
        .hero-coupon::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -100px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(46, 125, 50, 0.04);
            pointer-events: none;
        }
        .hero-coupon .container {
            position: relative;
            z-index: 1;
        }
        .hero-coupon__head {
            max-width: 720px;
            margin-bottom: 36px;
        }
        .hero-coupon__tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 18px;
        }
        .hero-coupon__title {
            font-size: 38px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .hero-coupon__desc {
            font-size: 17px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 24px;
            max-width: 600px;
        }
        .hero-coupon__actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .coupon-wall {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
            margin-top: 8px;
        }
        .coupon-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 22px;
            position: relative;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }
        .coupon-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(15, 76, 129, 0.3);
        }
        .coupon-card--featured {
            grid-column: span 2;
            background: linear-gradient(135deg, #0F4C81 0%, #0A3A62 100%);
            border-color: var(--color-primary);
            color: var(--color-white);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .coupon-card--featured .coupon-card__value {
            color: var(--color-gold);
            font-size: 42px;
        }
        .coupon-card--featured .coupon-card__title {
            color: var(--color-white);
            font-size: 22px;
        }
        .coupon-card--featured .coupon-card__desc {
            color: rgba(255, 255, 255, 0.8);
        }
        .coupon-card--featured .btn--gold {
            align-self: flex-start;
        }
        .coupon-card__badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: var(--color-secondary);
            background-color: var(--color-secondary-light);
            padding: 2px 10px;
            border-radius: 12px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .coupon-card--featured .coupon-card__badge {
            background-color: rgba(255, 255, 255, 0.18);
            color: var(--color-gold);
        }
        .coupon-card__value {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 4px;
            line-height: 1.2;
        }
        .coupon-card__title {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text-title);
            margin-bottom: 8px;
        }
        .coupon-card__desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .coupon-card__link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .coupon-card__link:hover {
            color: var(--color-primary-dark);
            text-decoration: underline;
        }
        .coupon-card--featured .coupon-card__link {
            color: var(--color-gold);
        }

        /* Intro section */
        .intro-section {
            background-color: var(--color-white);
            border-bottom: 1px solid var(--color-border);
        }
        .intro-section__inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .intro-section__text .section__title {
            font-size: 28px;
            margin-bottom: 16px;
        }
        .intro-section__text p {
            color: var(--color-text-muted);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 12px;
        }
        .intro-section__image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .intro-section__image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        /* Age timeline */
        .age-timeline {
            position: relative;
        }
        .age-timeline::before {
            content: '';
            position: absolute;
            left: 28px;
            top: 0;
            bottom: 0;
            width: 2px;
            background-color: var(--color-border);
            border-radius: 2px;
        }
        .age-timeline__item {
            position: relative;
            padding-left: 72px;
            margin-bottom: 32px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--color-border);
        }
        .age-timeline__item:last-child {
            margin-bottom: 0;
            border-bottom: none;
        }
        .age-timeline__dot {
            position: absolute;
            left: 16px;
            top: 4px;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background-color: var(--color-primary);
            border: 4px solid var(--color-primary-light);
            box-shadow: 0 0 0 4px var(--color-white);
            z-index: 1;
        }
        .age-timeline__age {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.05em;
            color: var(--color-secondary);
            background-color: var(--color-secondary-light);
            padding: 3px 12px;
            border-radius: 12px;
            margin-bottom: 8px;
            text-transform: uppercase;
        }
        .age-timeline__title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .age-timeline__desc {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.85;
            margin-bottom: 0;
        }

        /* Assessment cards */
        .assessment-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
            height: 100%;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .assessment-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(15, 76, 129, 0.25);
        }
        .assessment-card__icon {
            width: 48px;
            height: 48px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-primary-light);
            border-radius: var(--radius-md);
            color: var(--color-primary);
            font-size: 20px;
            margin-bottom: 16px;
        }
        .assessment-card__title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .assessment-card__desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin-bottom: 14px;
        }
        .assessment-card__list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .assessment-card__list li {
            font-size: 13px;
            color: var(--color-text-body);
            padding: 6px 0;
            border-bottom: 1px dashed var(--color-border);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .assessment-card__list li:last-child {
            border-bottom: none;
        }
        .assessment-card__list li i {
            color: var(--color-secondary);
            font-size: 12px;
        }

        /* Safety section with image */
        .safety-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .safety-block__image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .safety-block__image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .safety-block__content h2 {
            font-size: 28px;
            margin-bottom: 16px;
        }
        .safety-block__content p {
            color: var(--color-text-muted);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 14px;
        }
        .safety-list {
            list-style: none;
            margin: 16px 0 0;
            padding: 0;
        }
        .safety-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border);
            font-size: 14px;
            color: var(--color-text-body);
        }
        .safety-list li:last-child {
            border-bottom: none;
        }
        .safety-list li i {
            color: var(--color-secondary);
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* FAQ */
        .faq-accordion .accordion-item {
            border: 1px solid var(--color-border);
            border-left: 4px solid var(--color-primary);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            background-color: var(--color-white);
        }
        .faq-accordion .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-title);
            padding: 18px 22px;
            border-radius: var(--radius-sm);
            background-color: var(--color-white);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background-color: var(--color-primary-light);
            color: var(--color-primary-dark);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--color-focus);
            outline-offset: 2px;
        }
        .faq-accordion .accordion-body {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.85;
            padding: 16px 22px 22px;
        }

        /* Stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        .stat-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            transition: all var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-card__number {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 4px;
            line-height: 1.2;
        }
        .stat-card__label {
            font-size: 14px;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* CTA */
        .cta-section {
            background-color: var(--color-bg-dark);
            text-align: center;
        }
        .cta-section__title {
            font-size: 30px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 16px;
        }
        .cta-section__desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.9;
        }
        .cta-form {
            max-width: 520px;
            margin: 0 auto;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-form input[type="email"] {
            flex: 1;
            min-width: 240px;
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: var(--color-white);
            color: var(--color-text-title);
            font-size: 15px;
            min-height: 44px;
            transition: border-color var(--transition);
        }
        .cta-form input[type="email"]:focus {
            outline: none;
            border-color: var(--color-gold);
            box-shadow: 0 0 0 2px rgba(200, 164, 77, 0.3);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-footer);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr 1.2fr;
            gap: 28px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            color: var(--color-white);
            margin-bottom: 12px;
        }
        .footer-brand .logo:hover {
            color: var(--color-gold);
        }
        .footer-brand__desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.8;
            margin-bottom: 0;
        }
        .footer-col__title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 14px;
        }
        .footer-col__link {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 5px 0;
            transition: color var(--transition);
        }
        .footer-col__link:hover {
            color: var(--color-white);
            text-decoration: underline;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom__links {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: auto;
        }
        .footer-bottom__links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
        }
        .footer-bottom__links a:hover {
            color: var(--color-white);
            text-decoration: underline;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .main-nav {
                gap: 12px;
            }
            .main-nav__list {
                gap: 2px;
            }
            .main-nav__link {
                padding: 8px 12px;
                font-size: 14px;
            }
            .intro-section__inner,
            .safety-block {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .coupon-card--featured {
                grid-column: span 2;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --gutter: 16px;
                --section-space: 52px;
            }
            h1 {
                font-size: 28px;
            }
            h2 {
                font-size: 24px;
            }
            h3 {
                font-size: 19px;
            }
            .site-header {
                height: var(--header-height);
            }
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                bottom: 0;
                background-color: var(--color-white);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 16px;
                transform: translateX(-100%);
                transition: transform var(--transition);
                z-index: 999;
                justify-content: flex-start;
            }
            .main-nav.open {
                transform: translateX(0);
            }
            .main-nav__list {
                flex-direction: column;
                width: 100%;
                gap: 4px;
            }
            .main-nav__link {
                display: block;
                padding: 12px 16px;
                font-size: 16px;
                width: 100%;
            }
            .lang-switch {
                margin-top: 16px;
            }
            .header-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-toggle span.open:nth-child(1) {
                transform: translateY(7px) rotate(45deg);
            }
            .nav-toggle span.open:nth-child(2) {
                opacity: 0;
            }
            .nav-toggle span.open:nth-child(3) {
                transform: translateY(-7px) rotate(-45deg);
            }
            .hero-coupon {
                padding: 36px 0 44px;
            }
            .hero-coupon__title {
                font-size: 28px;
            }
            .hero-coupon__desc {
                font-size: 15px;
            }
            .coupon-wall {
                grid-template-columns: 1fr;
            }
            .coupon-card--featured {
                grid-column: span 1;
            }
            .age-timeline::before {
                left: 16px;
            }
            .age-timeline__item {
                padding-left: 48px;
            }
            .age-timeline__dot {
                left: 8px;
                width: 18px;
                height: 18px;
                border-width: 3px;
            }
            .cta-section__title {
                font-size: 24px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form input[type="email"] {
                min-width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-bottom__links {
                margin-left: 0;
            }
            .section {
                padding-top: var(--section-space-mobile);
                padding-bottom: var(--section-space-mobile);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .coupon-card {
                padding: 18px;
            }
            .coupon-card--featured .coupon-card__value {
                font-size: 32px;
            }
            .intro-section__text .section__title {
                font-size: 22px;
            }
            .safety-block__content h2 {
                font-size: 22px;
            }
        }