/* roulang page: index */
:root {
            --primary: #1d3a5f;
            --primary-light: #2e6a9a;
            --accent: #0e8a78;
            --accent-soft: #e5f4f1;
            --bg: #ffffff;
            --bg-soft: #f4f7fb;
            --bg-deep: #0f1f33;
            --text: #22303f;
            --text-weak: #5d6b7e;
            --border: #dfe6ee;
            --radius: 12px;
            --radius-lg: 22px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(16, 35, 60, .06);
            --shadow: 0 10px 32px rgba(16, 35, 60, .08);
            --shadow-lg: 0 22px 60px rgba(16, 35, 60, .12);
            --container: 1200px;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            width: min(var(--container), 92%);
            margin: 0 auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(255, 255, 255, .94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(223, 230, 238, .8);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: .5px;
            flex-shrink: 0;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(145deg, #215f96, #142a4a);
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(20, 42, 74, .25);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 9px 16px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            transition: all .2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary-light);
            background: var(--bg-soft);
        }

        .nav-link.is-active {
            color: var(--primary);
            background: var(--accent-soft);
            font-weight: 600;
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 18px;
            border-radius: 40px;
            transition: all .2s ease;
            flex-shrink: 0;
            box-shadow: 0 6px 16px rgba(29, 58, 95, .22);
        }

        .header-cta:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            background: var(--bg-soft);
            flex-shrink: 0;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all .3s ease;
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

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

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            color: #fff;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url("/assets/images/backpic/back-1.webp");
            background-size: cover;
            background-position: center 70%;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(118deg, rgba(8, 22, 42, .88) 0%, rgba(10, 28, 52, .72) 55%, rgba(13, 42, 82, .55) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 90px 0 70px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .18);
            padding: 7px 16px;
            border-radius: 40px;
            font-size: 13px;
            letter-spacing: .4px;
            backdrop-filter: blur(6px);
            margin-bottom: 24px;
        }

        .hero-badge i {
            color: #7fd4c4;
        }

        .hero h1 {
            font-size: clamp(30px, 4.8vw, 52px);
            font-weight: 800;
            line-height: 1.18;
            max-width: 720px;
            letter-spacing: .5px;
            margin-bottom: 20px;
        }

        .hero-lead {
            font-size: 17px;
            line-height: 1.8;
            max-width: 650px;
            color: rgba(255, 255, 255, .88);
            margin-bottom: 34px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 52px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 40px;
            padding: 13px 26px;
            transition: all .25s ease;
            border: 1px solid transparent;
            line-height: 1;
        }

        .btn-primary {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .12);
        }

        .btn-primary:hover {
            background: #f0f6fb;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, .18);
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, .6);
            color: #fff;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
        }

        .hero-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 0;
            border-top: 1px solid rgba(255, 255, 255, .18);
            max-width: 720px;
        }

        .metric {
            flex: 1 1 150px;
            padding: 24px 20px 4px 0;
            margin-right: 34px;
        }

        .metric:last-child {
            margin-right: 0;
        }

        .metric-num {
            display: block;
            font-size: 28px;
            font-weight: 800;
            color: #bde3db;
            line-height: 1.2;
        }

        .metric-label {
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
        }

        .section {
            padding: 90px 0;
        }

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

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

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

        .section-eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 1.2px;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-head h2 {
            font-size: clamp(26px, 3vw, 38px);
            line-height: 1.25;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 14px;
            letter-spacing: .3px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-weak);
            line-height: 1.75;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 34px 28px;
            box-shadow: var(--shadow-sm);
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
        }

        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 16px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 22px;
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .feature-card p {
            font-size: 14.5px;
            line-height: 1.8;
            color: var(--text-weak);
        }

        .category-section {
            background: var(--bg-soft);
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 360px;
            display: block;
            isolation: isolate;
            box-shadow: var(--shadow-sm);
        }

        .category-card__img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .category-card::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(9, 20, 38, .92) 10%, rgba(9, 20, 38, .42) 55%, rgba(9, 20, 38, .15) 100%);
            transition: opacity .3s ease;
        }

        .category-card:hover .category-card__img {
            transform: scale(1.06);
        }

        .category-card__body {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 28px;
            color: #fff;
            z-index: 2;
        }

        .category-card__index {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            color: #a9dcd0;
            display: block;
            margin-bottom: 8px;
        }

        .category-card__body h3 {
            font-size: 23px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .category-card__body p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, .82);
            margin-bottom: 16px;
            max-width: 320px;
        }

        .category-card__link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 14px;
            font-weight: 600;
            padding: 9px 18px;
            border-radius: 40px;
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .24);
            backdrop-filter: blur(8px);
            color: #fff;
            transition: all .2s ease;
        }

        .category-card__link:hover {
            background: #fff;
            color: var(--primary);
        }

        .news {
            background: #fff;
        }

        .news-inner {
            display: grid;
            grid-template-columns: 340px 1fr;
            gap: 50px;
            align-items: start;
        }

        .news-heading {
            position: sticky;
            top: 110px;
        }

        .news-heading .section-eyebrow {
            margin-top: 0;
        }

        .news-heading h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            margin: 8px 0 14px;
        }

        .news-heading p {
            color: var(--text-weak);
            font-size: 15px;
            margin-bottom: 22px;
        }

        .news-note {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-soft);
            color: var(--text-weak);
            font-size: 13px;
            border-radius: 40px;
            padding: 8px 14px;
        }

        .news-list-wrap {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .news-item {
            display: block;
            background: var(--bg-soft);
            border: 1px solid #edf1f7;
            border-radius: 16px;
            padding: 20px 22px;
            transition: all .25s ease;
        }

        .news-item:hover {
            background: #fff;
            border-color: #cfdae6;
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .news-item__meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .news-item__category {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-soft);
            border-radius: 20px;
            padding: 3px 12px;
        }

        .news-item__date {
            font-size: 12px;
            color: var(--text-weak);
        }

        .news-item__title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .news-item__excerpt {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }

        .news-item__more {
            font-size: 13px;
            color: var(--primary-light);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-empty {
            padding: 40px;
            text-align: center;
            background: var(--bg-soft);
            border-radius: 16px;
            color: var(--text-weak);
        }

        .steps {
            background: var(--bg-deep);
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .steps::before {
            content: "";
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(46, 106, 154, .35), transparent 70%);
            right: -80px;
            top: -80px;
            pointer-events: none;
        }

        .steps .section-head h2 {
            color: #fff;
        }

        .steps .section-head p {
            color: rgba(255, 255, 255, .7);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            position: relative;
            z-index: 1;
        }

        .step-card {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 20px;
            padding: 32px 26px;
            backdrop-filter: blur(8px);
            transition: all .3s ease;
        }

        .step-card:hover {
            background: rgba(255, 255, 255, .1);
            transform: translateY(-4px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: linear-gradient(145deg, #2e6a9a, #142a4a);
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 18px;
        }

        .step-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }

        .step-card p {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, .72);
        }

        .prep-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .prep-illustration {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .prep-illustration img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .checklist {
            margin-top: 28px;
            display: grid;
            gap: 18px;
        }

        .check-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .check-icon {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            margin-top: 4px;
        }

        .check-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 3px;
        }

        .check-item p {
            font-size: 14px;
            color: var(--text-weak);
        }

        .faq {
            background: var(--bg-soft);
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow .2s ease;
        }

        .faq-item[open] {
            box-shadow: var(--shadow-sm);
            border-color: #c8d6e2;
        }

        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            transition: background .2s ease;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            background: var(--bg-soft);
        }

        .faq-item summary .faq-toggle {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-soft);
            color: var(--primary);
            font-size: 13px;
            transition: all .25s ease;
        }

        .faq-item[open] summary .faq-toggle {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-content {
            padding: 0 24px 22px;
            color: var(--text-weak);
            font-size: 14.5px;
            line-height: 1.8;
        }

        .cta {
            position: relative;
            background-image: url("/assets/images/backpic/back-3.webp");
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            padding: 100px 0;
        }

        .cta-overlay {
            position: absolute;
            inset: 0;
            background: rgba(10, 23, 42, .9);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta h2 {
            font-size: clamp(26px, 3.4vw, 38px);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cta p {
            font-size: 16px;
            color: rgba(255, 255, 255, .8);
            margin-bottom: 32px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
        }

        .cta .btn-outline {
            border-color: rgba(255, 255, 255, .7);
        }

        .site-footer {
            background: #0d1c2e;
            color: rgba(255, 255, 255, .74);
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding: 60px 0 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .footer-logo .logo-mark {
            background: linear-gradient(145deg, #2e6a9a, #12233a);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: .5px;
        }

        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
            transition: color .2s ease;
        }

        .footer-col a:hover {
            color: #8fd6c8;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 20px 0;
        }

        .footer-bottom-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, .44);
        }

        @media (max-width: 1024px) {
            .feature-grid,
            .category-grid {
                gap: 20px;
            }
            .news-inner {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .news-heading {
                position: static;
            }
            .prep-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 860px) {
            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 16px 20px;
                gap: 4px;
                box-shadow: 0 16px 30px rgba(0, 0, 0, .1);
                transform: translateY(-110%);
                opacity: 0;
                visibility: hidden;
                transition: all .3s ease;
                border-radius: 0 0 18px 18px;
                z-index: 40;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-link {
                padding: 12px 16px;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .header-cta {
                display: none;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
                max-width: 500px;
                margin: 0 auto;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                max-width: 480px;
                margin: 0 auto;
            }
            .section {
                padding: 64px 0;
            }
            .hero {
                min-height: 0;
            }
            .hero-content {
                padding: 70px 0;
            }
        }

        @media (max-width: 560px) {
            .header-inner {
                height: 64px;
            }
            .main-nav {
                top: 64px;
            }
            .logo {
                font-size: 19px;
            }
            .hero h1 {
                font-size: 30px;
            }
            .hero-lead {
                font-size: 15px;
            }
            .hero-actions .btn {
                flex: 1 1 100%;
                justify-content: center;
            }
            .hero-metrics {
                display: block;
            }
            .metric {
                margin-right: 0;
            }
            .section {
                padding: 54px 0;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .section-head h2 {
                font-size: 27px;
            }
            .feature-card {
                padding: 26px 20px;
            }
            .category-card {
                min-height: 320px;
            }
            .news-item {
                padding: 16px;
            }
            .faq-item summary {
                padding: 16px;
                font-size: 15px;
            }
            .faq-content {
                padding: 0 16px 18px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
                padding: 44px 0 24px;
            }
            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: article */
:root {
            --c-bg: #f5f1ec;
            --c-bg-soft: #fbf8f4;
            --c-card: #ffffff;
            --c-text: #26343b;
            --c-text-light: #5c6b73;
            --c-heading: #1b2b32;
            --c-primary: #315661;
            --c-primary-dark: #22404a;
            --c-accent: #aa7d58;
            --c-accent-light: #f0e4d8;
            --c-line: #e2d9d1;
            --c-grad: linear-gradient(120deg, rgba(251, 248, 244, 0.94), rgba(235, 229, 222, 0.78));
            --radius: 20px;
            --radius-sm: 14px;
            --shadow: 0 12px 34px rgba(36, 46, 54, 0.07);
            --shadow-hover: 0 18px 40px rgba(36, 46, 54, 0.12);
            --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
            --font-head: "Noto Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-body);
            background: var(--c-bg);
            color: var(--c-text);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

        body.nav-open {
            overflow: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease, background .25s ease, border-color .25s ease;
        }

        button,
        input,
        textarea {
            font: inherit;
        }

        p,
        h1,
        h2,
        h3,
        h4,
        ul,
        ol {
            margin: 0;
        }

        ul,
        ol {
            padding: 0;
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4 {
            color: var(--c-heading);
            line-height: 1.35;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 68px 0;
        }

        .section-head {
            max-width: 700px;
            margin-bottom: 36px;
        }

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

        .eyebrow {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 99px;
            background: var(--c-accent-light);
            color: #8a5a35;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .08em;
        }

        .section-head h2 {
            font-family: var(--font-head);
            font-size: 34px;
            font-weight: 700;
            margin: 14px 0 10px;
        }

        .section-head p {
            color: var(--c-text-light);
            font-size: 16px;
        }

        /* ---------- Header ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 80;
            background: rgba(250, 247, 243, 0.86);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 217, 209, 0.7);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            min-height: 74px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 21px;
            font-weight: 800;
            color: var(--c-heading);
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .logo-mark {
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px 4px 12px 4px;
            background: var(--c-primary);
            color: #fff;
            font-size: 19px;
            font-weight: 800;
            text-transform: uppercase;
            box-shadow: 0 5px 14px rgba(49, 86, 97, .3);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 9px 17px;
            border-radius: 99px;
            font-weight: 600;
            font-size: 15px;
            color: var(--c-text-light);
            transition: background .25s, color .25s;
        }

        .nav-link:hover {
            background: rgba(49, 86, 97, .08);
            color: var(--c-heading);
        }

        .nav-link.is-active {
            background: var(--c-primary);
            color: #fff;
            box-shadow: 0 5px 14px rgba(49, 86, 97, .22);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 99px;
            background: var(--c-primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background .25s, transform .25s, box-shadow .25s;
        }

        .header-cta:hover {
            background: var(--c-primary-dark);
            box-shadow: 0 8px 20px rgba(49, 86, 97, .28);
            transform: translateY(-2px);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            border: 1px solid var(--c-line);
            border-radius: 12px;
            background: transparent;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--c-heading);
            transition: transform .3s, opacity .3s;
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ---------- Page Hero ---------- */
        .page-hero {
            position: relative;
            padding: 78px 0 70px;
            background: linear-gradient(135deg, rgba(250, 247, 243, .96) 0, rgba(240, 233, 226, .88) 100%), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            border-bottom: 1px solid var(--c-line);
        }

        .page-hero-inner {
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
        }

        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 16px;
            border-radius: 99px;
            background: rgba(255, 255, 255, .72);
            border: 1px solid var(--c-line);
            color: #7d5940;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: .04em;
        }

        .hero-kicker i {
            color: var(--c-accent);
        }

        .page-hero h1 {
            font-family: var(--font-head);
            font-size: clamp(28px, 4.4vw, 44px);
            font-weight: 700;
            line-height: 1.45;
            margin: 20px 0 16px;
        }

        .page-hero-tip {
            color: var(--c-text-light);
            font-size: 16px;
            max-width: 640px;
            margin: 0 auto 22px;
        }

        .hero-meta {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px 22px;
            font-size: 14px;
            color: var(--c-text-light);
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 5px 12px;
            background: rgba(255, 255, 255, .6);
            border: 1px solid var(--c-line);
            border-radius: 99px;
        }

        .meta-item i {
            color: var(--c-accent);
        }

        .article-no-title {
            font-family: var(--font-head);
            font-size: 34px;
            margin: 14px 0 8px;
        }

        /* ---------- Article Main Section ---------- */
        .article-main {
            padding: 52px 0 64px;
            background: var(--c-bg);
        }

        .article-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 34px;
            align-items: start;
        }

        .article-card {
            background: var(--c-card);
            border: 1px solid var(--c-line);
            border-radius: 26px;
            box-shadow: var(--shadow);
            padding: 42px 46px;
            overflow: hidden;
        }

        .article-card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding-bottom: 18px;
            margin-bottom: 24px;
            border-bottom: 1px dashed #ddd4ca;
        }

        .article-card-top .tagline {
            font-size: 14px;
            color: var(--c-text-light);
        }

        .official-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 13px;
            border-radius: 99px;
            background: var(--c-accent-light);
            color: #7c5638;
            font-size: 13px;
            font-weight: 600;
        }

        .article-content {
            font-size: 16.5px;
            color: #34434b;
        }

        .article-content p {
            margin-bottom: 1.4em;
            line-height: 2;
        }

        .article-content h2 {
            font-family: var(--font-head);
            font-size: 25px;
            margin: 1.6em 0 .6em;
            padding-left: 12px;
            border-left: 4px solid var(--c-accent);
        }

        .article-content h3 {
            font-family: var(--font-head);
            font-size: 21px;
            margin: 1.5em 0 .4em;
        }

        .article-content h4 {
            font-size: 17px;
            margin: 1.4em 0 .3em;
        }

        .article-content ul,
        .article-content ol {
            margin: 1em 0 1.5em;
            padding-left: 4px;
        }

        .article-content li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 8px;
            line-height: 1.9;
        }

        .article-content ul li::before {
            content: "";
            position: absolute;
            left: 4px;
            top: 13px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--c-accent);
        }

        .article-content ol {
            counter-reset: article-list;
        }

        .article-content ol li {
            counter-increment: article-list;
        }

        .article-content ol li::before {
            content: counter(article-list) ".";
            position: absolute;
            left: 2px;
            top: 0;
            font-weight: 700;
            color: var(--c-accent);
        }

        .article-content blockquote {
            margin: 1.8em 0;
            padding: 18px 22px;
            border-radius: 0 16px 16px 0;
            border-left: 4px solid var(--c-accent);
            background: #faf5ef;
            color: #5c4635;
            font-size: 16px;
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content img {
            border-radius: 16px;
            margin: 1.6em auto;
            box-shadow: 0 10px 26px rgba(34, 42, 48, .1);
        }

        .article-content a {
            color: var(--c-primary);
            border-bottom: 1px solid rgba(49, 86, 97, .35);
            font-weight: 600;
        }

        .article-content a:hover {
            border-bottom-color: var(--c-primary);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            border-radius: 12px;
            overflow: hidden;
            font-size: 15px;
        }

        .article-content table th,
        .article-content table td {
            padding: 12px 14px;
            border-bottom: 1px solid var(--c-line);
            text-align: left;
        }

        .article-content table th {
            background: #f1ece5;
            font-weight: 700;
            color: var(--c-heading);
        }

        .article-content table tr:last-child td {
            border-bottom: none;
        }

        .article-empty {
            text-align: center;
            padding: 46px 20px 52px;
        }

        .article-empty i {
            font-size: 44px;
            color: #cbb9a8;
            margin-bottom: 18px;
        }

        .article-empty h2 {
            font-family: var(--font-head);
            font-size: 28px;
            margin-bottom: 10px;
        }

        .article-empty p {
            color: var(--c-text-light);
            margin-bottom: 24px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 12px 24px;
            border-radius: 99px;
            background: var(--c-primary);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            transition: background .25s, transform .25s, box-shadow .25s;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--c-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(49, 86, 97, .25);
        }

        /* ---------- Article Aside ---------- */
        .article-aside {
            display: flex;
            flex-direction: column;
            gap: 18px;
            position: sticky;
            top: 96px;
        }

        .aside-card {
            background: var(--c-card);
            border: 1px solid var(--c-line);
            border-radius: 20px;
            box-shadow: 0 6px 24px rgba(33, 42, 49, .05);
            padding: 24px 22px;
        }

        .aside-card h3 {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: 18px;
            margin-bottom: 16px;
        }

        .aside-card h3 i {
            color: var(--c-accent);
        }

        .aside-quick-links a {
            display: flex;
            align-items: center;
            gap: 13px;
            padding: 12px 13px;
            border: 1px solid var(--c-line);
            border-radius: 14px;
            margin-bottom: 9px;
            transition: border-color .25s, background .25s, transform .25s;
        }

        .aside-quick-links a:hover {
            border-color: #bfb0a2;
            background: var(--c-bg-soft);
            transform: translateX(3px);
        }

        .side-icon {
            width: 36px;
            height: 36px;
            border-radius: 11px;
            display: grid;
            place-items: center;
            background: var(--c-accent-light);
            color: #8a5a35;
            font-size: 15px;
        }

        .aside-quick-links strong {
            display: block;
            font-size: 15px;
            color: var(--c-heading);
        }

        .aside-quick-links em {
            display: block;
            font-size: 13px;
            font-style: normal;
            color: var(--c-text-light);
        }

        .aside-tip-list li {
            display: flex;
            gap: 9px;
            padding: 9px 0;
            border-bottom: 1px dashed #eee5dc;
            font-size: 14.5px;
            color: #4f5e66;
        }

        .aside-tip-list li:last-child {
            border-bottom: 0;
        }

        .aside-tip-list i {
            color: var(--c-accent);
            margin-top: 5px;
            font-size: 13px;
        }

        .aside-help {
            background: linear-gradient(145deg, var(--c-primary), #406671);
            border: none;
            color: #fff;
        }

        .aside-help h3 {
            color: #fff;
        }

        .aside-help p {
            color: rgba(255, 255, 255, .8);
            font-size: 14px;
            margin-bottom: 16px;
        }

        .aside-help .btn-primary {
            background: #fff;
            color: var(--c-primary);
            font-size: 14px;
            padding: 10px 16px;
            box-shadow: 0 6px 16px rgba(0, 0, 0, .12);
        }

        .aside-help .btn-primary:hover {
            background: var(--c-accent-light);
            color: #6b4c37;
        }

        /* ---------- Explore Section ---------- */
        .explore-section {
            background: var(--c-bg-soft);
            border-top: 1px solid var(--c-line);
        }

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

        .explore-card {
            background: var(--c-card);
            border: 1px solid var(--c-line);
            border-radius: 22px;
            overflow: hidden;
            box-shadow: 0 8px 26px rgba(33, 42, 49, .05);
            transition: transform .3s, box-shadow .3s;
        }

        .explore-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .explore-card-thumb {
            height: 170px;
            overflow: hidden;
            background: #eadfd4;
        }

        .explore-card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s;
        }

        .explore-card:hover .explore-card-thumb img {
            transform: scale(1.05);
        }

        .explore-card-body {
            padding: 22px 22px 26px;
        }

        .explore-card-body h3 {
            font-size: 20px;
            font-family: var(--font-head);
            margin-bottom: 8px;
        }

        .explore-card-body p {
            font-size: 14.5px;
            color: var(--c-text-light);
            margin-bottom: 16px;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 14px;
            font-weight: 700;
            color: var(--c-primary);
        }

        .text-link i {
            transition: transform .25s;
        }

        .text-link:hover {
            color: var(--c-accent);
        }

        .text-link:hover i {
            transform: translateX(4px);
        }

        /* ---------- FAQ ---------- */
        .faq-section {
            background: var(--c-bg);
        }

        .faq-wrap {
            max-width: 850px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--c-card);
            border: 1px solid var(--c-line);
            border-radius: 18px;
            margin-bottom: 13px;
            box-shadow: 0 4px 18px rgba(33, 42, 49, .04);
            transition: box-shadow .25s;
        }

        .faq-item:hover {
            box-shadow: 0 8px 22px rgba(33, 42, 49, .08);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 18px;
            width: 100%;
            padding: 19px 22px;
            border: none;
            background: transparent;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--c-heading);
            text-align: left;
        }

        .faq-question i {
            color: var(--c-accent);
            transition: transform .3s;
        }

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

        .faq-answer {
            display: none;
            padding: 4px 22px 20px;
            color: var(--c-text-light);
            font-size: 15px;
            line-height: 2;
        }

        .faq-item.is-open .faq-answer {
            display: block;
        }

        /* ---------- CTA ---------- */
        .cta-section {
            padding: 30px 0 80px;
            background: var(--c-bg-soft);
        }

        .cta-panel {
            position: relative;
            border-radius: 28px;
            color: #fff;
            overflow: hidden;
            background: linear-gradient(120deg, rgba(29, 51, 60, .95) 0, rgba(55, 78, 86, .83) 100%), url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
            padding: 50px 42px;
            text-align: center;
            box-shadow: 0 16px 40px rgba(31, 49, 58, .25);
        }

        .cta-panel h2 {
            color: #fff;
            font-family: var(--font-head);
            font-size: 30px;
            margin-bottom: 10px;
        }

        .cta-panel p {
            color: rgba(255, 255, 255, .82);
            max-width: 500px;
            margin: 0 auto 24px;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .btn-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 99px;
            background: #fff;
            color: var(--c-primary);
            font-weight: 700;
            font-size: 15px;
            transition: transform .25s, background .25s;
            border: none;
            cursor: pointer;
        }

        .btn-light:hover {
            transform: translateY(-2px);
            background: var(--c-accent-light);
        }

        .btn-ghost-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 99px;
            border: 1px solid rgba(255, 255, 255, .55);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            transition: background .25s, transform .25s;
        }

        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, .16);
            transform: translateY(-2px);
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: #1f2b30;
            color: #9eacb1;
            font-size: 14.5px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 38px;
            padding: 54px 0 40px;
        }

        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
        }

        .footer-logo .logo-mark {
            background: rgba(255, 255, 255, .14);
            box-shadow: none;
        }

        .footer-brand p {
            margin-top: 16px;
            max-width: 360px;
            line-height: 1.9;
            color: #a8b5ba;
        }

        .footer-col {
            display: flex;
            flex-direction: column;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 14px;
            letter-spacing: .03em;
        }

        .footer-col a {
            color: #9eacb1;
            padding: 4px 0;
            transition: color .25s, padding-left .25s;
        }

        .footer-col a:hover {
            color: #ffffff;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 18px 0;
            font-size: 13px;
            color: #778b91;
        }

        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 1080px) {
            .article-grid {
                grid-template-columns: minmax(0, 1fr);
            }

            .article-aside {
                position: static;
                display: grid;
                grid-template-columns: repeat(3, 1fr);
                gap: 14px;
            }

            .explore-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 860px) {
            .main-nav {
                position: fixed;
                inset: 74px 16px auto 16px;
                background: #fffdfb;
                border: 1px solid var(--c-line);
                border-radius: 20px;
                box-shadow: 0 18px 44px rgba(29, 42, 50, .2);
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 14px;
                display: none;
            }

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

            .nav-link {
                padding: 13px 16px;
                border-radius: 12px;
            }

            .header-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .explore-grid {
                grid-template-columns: 1fr;
                max-width: 520px;
                margin-left: auto;
                margin-right: auto;
            }

            .article-aside {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 640px) {
            .section {
                padding: 52px 0;
            }

            .page-hero {
                padding: 58px 0 50px;
            }

            .article-card {
                padding: 28px 22px;
                border-radius: 18px;
            }

            .article-card-top {
                flex-direction: column;
                align-items: flex-start;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 26px;
                padding: 42px 0 30px;
            }

            .cta-panel {
                padding: 36px 24px;
            }

            .section-head h2 {
                font-size: 28px;
            }

            .page-hero-inner h1 {
                font-size: 28px;
            }

            .footer-bottom-inner {
                flex-direction: column;
            }
        }

        @media (max-width: 400px) {
            .container {
                padding: 0 18px;
            }

            .article-content {
                font-size: 15.5px;
            }

            .article-content p {
                line-height: 1.95;
            }

            .cta-actions .btn-light,
            .cta-actions .btn-ghost-light {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category1 */
:root {
            --teal-700: #176b63;
            --teal-600: #1d7f74;
            --teal-500: #269387;
            --teal-soft: #e1f1ec;
            --teal-deep: #0e403d;
            --ink: #18312f;
            --muted: #5f6f70;
            --paper: #ffffff;
            --canvas: #f2f7f5;
            --line: #e3ebe8;
            --shadow-sm: 0 6px 18px rgba(16, 42, 67, .06);
            --shadow-md: 0 16px 40px rgba(16, 42, 67, .09);
            --shadow-lg: 0 32px 66px rgba(16, 42, 67, .12);
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 28px;
            --transition: .25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body,
        h1,
        h2,
        h3,
        h4,
        p,
        ul,
        ol,
        figure,
        blockquote {
            margin: 0;
        }

        ul,
        ol {
            padding: 0;
            list-style: none;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--paper);
            color: var(--ink);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        img {
            display: block;
            max-width: 100%;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font: inherit;
            color: inherit;
            background: none;
            border: 0;
            cursor: pointer;
        }

        details summary {
            list-style: none;
        }

        details summary::-webkit-details-marker {
            display: none;
        }

        .container {
            width: 100%;
            max-width: 1180px;
            margin-inline: auto;
            padding-inline: 24px;
        }

        .section {
            padding: 96px 0;
        }

        .section-soft {
            background: var(--canvas);
        }

        .section-head {
            max-width: 720px;
            margin: 0 auto 52px;
            text-align: center;
        }

        .section-head.left {
            margin-left: 0;
            text-align: left;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
            padding: 8px 16px;
            border-radius: 999px;
            background: var(--teal-soft);
            color: var(--teal-700);
            font-size: 13px;
            font-weight: 800;
            letter-spacing: .04em;
        }

        .section-tag.light {
            background: rgba(255, 255, 255, .14);
            color: #eafffa;
        }

        .section-head h2 {
            font-size: clamp(28px, 3.4vw, 42px);
            line-height: 1.25;
            letter-spacing: -.02em;
            margin-bottom: 16px;
        }

        .section-head p {
            color: var(--muted);
            font-size: clamp(15px, 1.6vw, 17px);
        }

        .site-header {
            position: sticky;
            top: 0;
            left: 0;
            right: 0;
            z-index: 60;
            background: rgba(255, 255, 255, .88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: border-color .25s, box-shadow .25s;
        }

        .site-header.is-scrolled {
            border-color: var(--line);
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 26px;
            min-height: 76px;
        }

        .logo,
        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 900;
            letter-spacing: -.01em;
            color: var(--ink);
        }

        .logo-mark {
            display: grid;
            place-items: center;
            width: 40px;
            height: 40px;
            border-radius: 14px;
            font-size: 20px;
            font-weight: 900;
            background: var(--teal-700);
            color: #fff;
            box-shadow: 0 8px 20px rgba(23, 107, 99, .26);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 14px;
            color: var(--muted);
            transition: color .2s, background .2s, transform .2s;
        }

        .nav-link:hover {
            color: var(--teal-700);
            background: var(--teal-soft);
        }

        .nav-link.is-active {
            color: var(--teal-700);
            background: var(--teal-soft);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            min-height: 42px;
            padding: 0 18px;
            border-radius: 999px;
            background: var(--teal-700);
            color: #fff;
            font-size: 13px;
            font-weight: 800;
            box-shadow: 0 8px 20px rgba(23, 107, 99, .2);
            transition: background .2s, transform .2s, box-shadow .2s;
        }

        .header-cta:hover {
            background: var(--teal-deep);
            transform: translateY(-2px);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: 14px;
            margin-left: auto;
            background: var(--teal-soft);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--ink);
            border-radius: 99px;
            transition: transform .25s, opacity .25s;
        }

        .site-header.is-open .nav-toggle span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

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

        .site-header.is-open .nav-toggle span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            min-height: 50px;
            padding: 0 25px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 800;
            line-height: 1;
            transition: transform .25s, box-shadow .25s, background .25s, color .25s, border-color .25s;
        }

        .btn-primary {
            background: var(--teal-700);
            color: #fff;
            box-shadow: 0 12px 30px rgba(23, 107, 99, .24);
        }

        .btn-primary:hover {
            background: var(--teal-deep);
            transform: translateY(-2px);
            box-shadow: 0 16px 36px rgba(23, 107, 99, .3);
        }

        .btn-outline {
            border: 1.5px solid rgba(255, 255, 255, .6);
            color: #fff;
            background: rgba(255, 255, 255, .08);
            backdrop-filter: blur(8px);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, .18);
            transform: translateY(-2px);
        }

        .btn-light {
            background: #fff;
            color: var(--teal-700);
            box-shadow: 0 10px 24px rgba(0, 0, 0, .12);
        }

        .btn-light:hover {
            background: #f4fffb;
            transform: translateY(-2px);
            box-shadow: 0 16px 34px rgba(0, 0, 0, .16);
        }

        .btn-ghost-light {
            border: 1.5px solid rgba(255, 255, 255, .55);
            color: #fff;
            background: rgba(255, 255, 255, .06);
        }

        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, .16);
            transform: translateY(-2px);
        }

        .entry-hero {
            position: relative;
            overflow: hidden;
            padding: 112px 0 152px;
            background-color: var(--teal-deep);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
        }

        .entry-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(78deg, rgba(10, 37, 42, .96) 0%, rgba(13, 54, 54, .88) 48%, rgba(18, 92, 80, .72) 100%);
            z-index: 1;
        }

        .entry-hero .container {
            position: relative;
            z-index: 2;
        }

        .crumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, .72);
            margin-bottom: 36px;
        }

        .crumb a {
            color: rgba(255, 255, 255, .8);
            transition: color .2s;
        }

        .crumb a:hover {
            color: #fff;
        }

        .crumb em {
            font-style: normal;
            opacity: .5;
        }

        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 18px;
            padding: 9px 16px;
            border-radius: 999px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .16);
            color: #eaffe9;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: .04em;
        }

        .hero-kicker::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #7fe7cd;
            box-shadow: 0 0 0 5px rgba(127, 231, 205, .18);
        }

        .hero-title {
            max-width: 760px;
            font-size: clamp(36px, 5.2vw, 62px);
            line-height: 1.14;
            letter-spacing: -.03em;
            color: #fff;
            margin-bottom: 20px;
            text-wrap: balance;
        }

        .hero-lead {
            max-width: 680px;
            font-size: clamp(16px, 1.8vw, 18px);
            color: rgba(255, 255, 255, .88);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 46px;
        }

        .hero-points {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .hero-points li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 15px;
            border-radius: 999px;
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .16);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
        }

        .hero-wave {
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            line-height: 0;
            z-index: 2;
        }

        .hero-wave svg {
            width: 100%;
            height: 82px;
            display: block;
        }

        .hero-wave .wave-fill {
            fill: var(--paper);
        }

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

        .benefit-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 30px;
            transition: transform .28s, box-shadow .28s, border-color .28s;
        }

        .benefit-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(23, 107, 99, .24);
        }

        .benefit-icon {
            display: grid;
            place-items: center;
            width: 58px;
            height: 58px;
            border-radius: 18px;
            background: var(--teal-soft);
            color: var(--teal-700);
            font-size: 23px;
            margin-bottom: 22px;
        }

        .benefit-card h3 {
            font-size: 19px;
            margin-bottom: 10px;
        }

        .benefit-card p {
            color: var(--muted);
            font-size: 15px;
        }

        .access-section {
            background: var(--canvas);
        }

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

        .access-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 30px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            transition: transform .28s, box-shadow .28s;
        }

        .access-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .access-top {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 16px;
        }

        .access-icon {
            display: grid;
            place-items: center;
            width: 50px;
            height: 50px;
            border-radius: 16px;
            background: var(--teal-deep);
            color: #a7f3e2;
            font-size: 20px;
        }

        .access-card h3 {
            font-size: 19px;
        }

        .access-card p {
            color: var(--muted);
            font-size: 14.5px;
            flex: 1;
        }

        .pill {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 6px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 700;
            white-space: nowrap;
        }

        .pill-good {
            background: #e5f6e9;
            color: #177a42;
        }

        .pill-soft {
            background: #ecf2ff;
            color: #3c64bc;
        }

        .pill-warn {
            background: #fff3e2;
            color: #b56a11;
        }

        .pill-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: currentColor;
        }

        .card-link,
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--teal-700);
            font-weight: 800;
            font-size: 14px;
            transition: gap .2s, color .2s;
        }

        .card-link:hover,
        .text-link:hover {
            gap: 12px;
            color: var(--teal-deep);
        }

        .scene-section {
            background: #123338;
            color: #fff;
        }

        .scene-section .section-head p {
            color: rgba(255, 255, 255, .68);
        }

        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .scene-card {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: 24px;
            padding: 26px 22px;
            transition: background .25s, transform .25s, border-color .25s;
        }

        .scene-card:hover {
            background: rgba(255, 255, 255, .1);
            transform: translateY(-5px);
            border-color: rgba(255, 255, 255, .22);
        }

        .scene-index {
            display: block;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: .08em;
            color: #9ef0dc;
            margin-bottom: 18px;
        }

        .scene-card h3 {
            font-size: 17px;
            margin-bottom: 10px;
        }

        .scene-card p {
            color: rgba(255, 255, 255, .72);
            font-size: 14px;
            line-height: 1.75;
        }

        .process-section {
            background: var(--canvas);
        }

        .process-wrap {
            max-width: 760px;
            margin: 0 auto;
        }

        .process-list {
            display: grid;
            gap: 18px;
        }

        .process-item {
            display: grid;
            grid-template-columns: auto 1fr;
            gap: 22px;
            padding: 26px 28px;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 24px;
            transition: box-shadow .25s, transform .25s;
        }

        .process-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }

        .process-step {
            display: grid;
            place-items: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--teal-700);
            color: #fff;
            font-weight: 900;
            font-size: 15px;
            box-shadow: 0 8px 20px rgba(23, 107, 99, .24);
        }

        .process-item h3 {
            font-size: 18px;
            margin-bottom: 6px;
        }

        .process-item p {
            color: var(--muted);
            font-size: 15px;
        }

        .split-section {
            background: var(--paper);
        }

        .split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            align-items: center;
            gap: 52px;
        }

        .split-media {
            border-radius: 32px;
            overflow: hidden;
            background: var(--canvas);
            box-shadow: var(--shadow-lg);
            transform: rotate(-1deg);
        }

        .split-media img {
            width: 100%;
            height: 100%;
            min-height: 360px;
            object-fit: cover;
        }

        .split-content .section-tag {
            margin-bottom: 14px;
        }

        .split-content h2 {
            font-size: clamp(26px, 3vw, 38px);
            line-height: 1.3;
            margin-bottom: 24px;
        }

        .note-list {
            display: grid;
            gap: 20px;
        }

        .note-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }

        .note-check {
            display: grid;
            flex: 0 0 auto;
            place-items: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--teal-soft);
            color: var(--teal-700);
            font-size: 13px;
            margin-top: 4px;
        }

        .note-item strong {
            display: block;
            margin-bottom: 5px;
            font-size: 16px;
        }

        .note-item p {
            color: var(--muted);
            font-size: 15px;
        }

        .quote-strip {
            background: #f8f6f1;
            padding: 70px 0;
        }

        .quote-card {
            max-width: 840px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            padding: 14px 18px;
        }

        .quote-card i {
            font-size: 44px;
            color: var(--teal-500);
            opacity: .25;
            margin-bottom: 18px;
        }

        .quote-card blockquote {
            font-size: clamp(18px, 2.2vw, 24px);
            line-height: 1.8;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 20px;
        }

        .quote-source {
            font-size: 14px;
            color: var(--muted);
            font-weight: 600;
        }

        .faq-section {
            background: var(--canvas);
        }

        .faq-list {
            max-width: 880px;
            margin: 0 auto;
            display: grid;
            gap: 14px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: 0;
            transition: border-color .25s, box-shadow .25s;
        }

        .faq-item[open] {
            border-color: rgba(23, 107, 99, .22);
            box-shadow: var(--shadow-sm);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 23px 26px;
            cursor: pointer;
            font-weight: 800;
            font-size: 16px;
            line-height: 1.6;
        }

        .faq-item summary i {
            flex: 0 0 auto;
            font-size: 15px;
            color: var(--teal-700);
            transition: transform .25s;
        }

        .faq-item[open] summary i {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 26px 24px;
            color: var(--muted);
            font-size: 15px;
            border-top: 1px solid var(--line);
            margin-top: 0;
        }

        .faq-answer p {
            padding-top: 18px;
        }

        .cta-section {
            padding: 90px 0;
        }

        .cta-card {
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            padding: 48px 52px;
            border-radius: 36px;
            color: #fff;
            background-color: var(--teal-deep);
            background-image: linear-gradient(110deg, rgba(9, 43, 47, .96), rgba(16, 82, 74, .9)), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            box-shadow: var(--shadow-lg);
        }

        .cta-card::after {
            content: "";
            position: absolute;
            width: 220px;
            height: 220px;
            right: -70px;
            top: -100px;
            border: 34px solid rgba(255, 255, 255, .08);
            border-radius: 50%;
        }

        .cta-info,
        .cta-actions {
            position: relative;
            z-index: 2;
        }

        .cta-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: .05em;
            color: #a9f0de;
            margin-bottom: 12px;
        }

        .cta-card h2 {
            font-size: clamp(23px, 3vw, 34px);
            line-height: 1.35;
            margin-bottom: 12px;
        }

        .cta-card p {
            color: rgba(255, 255, 255, .76);
            max-width: 530px;
        }

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

        .site-footer {
            background: #142a2b;
            color: #9cb0b1;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding: 62px 24px 42px;
        }

        .site-footer .footer-logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: #9cb0b1;
            max-width: 360px;
            line-height: 1.85;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 800;
            margin-bottom: 18px;
            letter-spacing: .03em;
        }

        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            font-size: 14px;
            color: #9cb0b1;
            transition: color .2s, transform .2s;
        }

        .footer-col a:hover {
            color: #fff;
            transform: translateX(4px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .09);
            padding: 22px 0;
        }

        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            flex-wrap: wrap;
        }

        .footer-bottom-inner p {
            color: #7f9899;
            font-size: 13px;
        }

        .footer-bottom-inner a {
            color: #7f9899;
        }

        .footer-bottom-inner a:hover {
            color: #fff;
        }

        @media (max-width: 1100px) {
            .benefit-grid,
            .access-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

        @media (max-width: 920px) {
            .header-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: absolute;
                top: calc(100% + 10px);
                left: 20px;
                right: 20px;
                display: flex;
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                padding: 18px;
                background: #fff;
                border: 1px solid var(--line);
                border-radius: 24px;
                box-shadow: var(--shadow-lg);
                opacity: 0;
                visibility: hidden;
                transform: translateY(-10px);
                pointer-events: none;
                transition: opacity .28s, transform .28s, visibility .28s;
            }

            .site-header.is-open .main-nav {
                opacity: 1;
                visibility: visible;
                transform: none;
                pointer-events: auto;
            }

            .main-nav .nav-link {
                display: flex;
                justify-content: center;
                padding: 13px 16px;
                font-size: 14px;
            }

            .split-grid {
                grid-template-columns: 1fr;
                gap: 38px;
            }

            .cta-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 40px 34px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 70px 0;
            }

            .entry-hero {
                padding: 88px 0 132px;
            }

            .hero-points li {
                padding: 7px 11px;
                font-size: 12px;
            }

            .hero-actions {
                margin-bottom: 36px;
            }

            .scene-grid {
                grid-template-columns: 1fr;
            }

            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
                padding: 48px 24px 32px;
            }

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

        @media (max-width: 560px) {
            .container {
                padding-inline: 18px;
            }

            .benefit-grid,
            .access-grid {
                grid-template-columns: 1fr;
            }

            .hero-title {
                font-size: 32px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .access-card,
            .benefit-card {
                padding: 24px;
            }

            .process-item {
                grid-template-columns: 1fr;
                gap: 12px;
                padding: 24px;
            }

            .split-media img {
                min-height: 250px;
            }

            .quote-strip,
            .cta-section {
                padding: 60px 0;
            }

            .cta-card {
                border-radius: 28px;
                padding: 32px 24px;
            }

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

            .footer-top {
                grid-template-columns: 1fr;
            }

            .footer-brand {
                grid-column: auto;
            }

            .footer-bottom-inner {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        .card-link:focus-visible,
        .text-link:focus-visible,
        .site-header a:focus-visible,
        .footer-col a:focus-visible,
        .faq-item summary:focus-visible,
        .crumb a:focus-visible {
            outline: 3px solid rgba(23, 107, 99, .35);
            outline-offset: 3px;
            border-radius: 10px;
        }

/* roulang page: category2 */
:root {
            --primary: #1e514b;
            --primary-deep: #143f3a;
            --primary-soft: #e4efea;
            --accent: #c1935a;
            --accent-deep: #a97a43;
            --accent-soft: #f4ead9;
            --bg: #f8f7f3;
            --surface: #ffffff;
            --ink: #1e2c2a;
            --muted: #61726e;
            --line: #e7e3db;
            --soft: #f0ede6;
            --radius-lg: 26px;
            --radius-md: 18px;
            --radius-sm: 12px;
            --shadow-sm: 0 8px 22px rgba(25, 50, 46, 0.06);
            --shadow-md: 0 18px 44px rgba(25, 50, 46, 0.09);
            --shadow-lg: 0 32px 70px rgba(25, 50, 46, 0.14);
            --container: 1200px;
            --header-h: 78px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            font-size: 17px;
            line-height: 1.85;
            background: var(--bg);
            color: var(--ink);
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        h1,
        h2,
        h3 {
            line-height: 1.3;
            margin: 0 0 0.6em;
            font-weight: 800;
            letter-spacing: -0.025em;
            color: var(--ink);
        }

        h1 {
            font-size: clamp(2.35rem, 5vw, 4rem);
        }

        h2 {
            font-size: clamp(1.9rem, 3.4vw, 2.75rem);
        }

        h3 {
            font-size: 1.25rem;
            margin-bottom: 0.5rem;
        }

        p {
            margin: 0 0 1em;
            line-height: 1.9;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        img {
            max-width: 100%;
            display: block;
        }

        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        details summary {
            list-style: none;
            cursor: pointer;
        }

        details summary::-webkit-details-marker {
            display: none;
        }

        .container {
            width: min(100% - 48px, var(--container));
            margin-inline: auto;
        }

        .section {
            padding: 110px 0;
        }

        .section-head {
            max-width: 780px;
            margin-bottom: 54px;
        }

        .section-head.centered {
            margin-inline: auto;
            text-align: center;
        }

        .section-head .eyebrow {
            margin-bottom: 16px;
        }

        .section-head p {
            font-size: 1.07rem;
            color: var(--muted);
            margin-top: 6px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-deep);
            background: var(--accent-soft);
            border: 1px solid rgba(193, 147, 90, 0.22);
            padding: 7px 16px;
            border-radius: 999px;
        }

        .eyebrow-light {
            color: #e8c99c;
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.18);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.55rem;
            padding: 0.9rem 1.65rem;
            border-radius: 999px;
            font-weight: 700;
            font-size: 1rem;
            line-height: 1.2;
            border: 1px solid transparent;
            transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
            will-change: transform;
        }

        .btn i {
            font-size: 0.95rem;
        }

        .btn:hover {
            transform: translateY(-2px);
        }

        .btn:active {
            transform: translateY(0);
        }

        .btn-light {
            background: #ffffff;
            color: var(--primary);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.12);
        }

        .btn-light:hover {
            background: #f2f7f4;
            box-shadow: 0 16px 36px rgba(0, 0, 0, 0.16);
        }

        .btn-ghost-light {
            background: rgba(255, 255, 255, 0.06);
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.5);
            backdrop-filter: blur(6px);
        }

        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, 0.16);
            border-color: #fff;
        }

        .btn-primary {
            background: var(--accent);
            color: #1d2a28;
            box-shadow: 0 14px 30px rgba(0, 0, 0, 0.16);
        }

        .btn-primary:hover {
            background: #c99e63;
            box-shadow: 0 18px 38px rgba(0, 0, 0, 0.2);
        }

        .btn-outline-light {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            min-height: var(--header-h);
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(230, 225, 215, 0.9);
        }

        .header-inner {
            display: flex;
            align-items: center;
            min-height: var(--header-h);
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            color: var(--primary);
            white-space: nowrap;
        }

        .logo-mark {
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 13px;
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #fff;
            font-weight: 900;
            font-size: 1.2rem;
            box-shadow: 0 10px 22px rgba(25, 75, 68, 0.25);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.6rem 1.1rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--muted);
            border: 1px solid transparent;
            transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

        .nav-link.is-active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 10px 24px rgba(30, 81, 75, 0.24);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.62rem 1.3rem;
            border-radius: 999px;
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-soft);
            border: 1px solid rgba(30, 81, 75, 0.1);
            transition: background 0.25s ease, transform 0.25s ease;
        }

        .header-cta:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }

        .header-cta i {
            font-size: 0.95rem;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 0;
            border-radius: 14px;
            background: var(--primary-soft);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            margin-left: auto;
            cursor: pointer;
            transition: background 0.25s ease;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 4px;
            background: var(--primary);
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        body.nav-open .nav-toggle span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

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

        body.nav-open .nav-toggle span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .usage-hero {
            position: relative;
            overflow: hidden;
            color: #fff;
            background-image:
                linear-gradient(108deg, rgba(17, 47, 44, 0.97) 0%, rgba(17, 47, 44, 0.87) 48%, rgba(25, 70, 64, 0.74) 100%),
                url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 128px 0 126px;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 64px;
            align-items: center;
        }

        .hero-copy h1 {
            color: #fff;
            margin-bottom: 22px;
        }

        .hero-accent {
            display: block;
            color: #f2d7ad;
            font-size: clamp(1.1rem, 2.4vw, 1.6rem);
            font-weight: 600;
            letter-spacing: -0.01em;
            margin-top: 10px;
        }

        .hero-lead {
            color: rgba(255, 255, 255, 0.86);
            font-size: 1.1rem;
            max-width: 660px;
            margin-bottom: 34px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .hero-note {
            display: grid;
            gap: 14px;
        }

        .quick-note-card {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px 22px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.16);
            border-radius: 20px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: background 0.3s ease, transform 0.3s ease;
        }

        .quick-note-card:hover {
            background: rgba(255, 255, 255, 0.17);
            transform: translateX(-4px);
        }

        .note-icon {
            flex: 0 0 46px;
            width: 46px;
            height: 46px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 15px;
            background: rgba(255, 255, 255, 0.16);
            color: #f3dcb7;
            font-size: 1.15rem;
        }

        .quick-note-card strong {
            display: block;
            color: #fff;
            font-size: 1rem;
            margin-bottom: 2px;
        }

        .quick-note-card p {
            margin: 0;
            color: rgba(255, 255, 255, 0.72);
            font-size: 0.93rem;
            line-height: 1.65;
        }

        .hero-wave {
            position: absolute;
            left: 0;
            bottom: -1px;
            width: 100%;
            height: 74px;
            z-index: 1;
            display: block;
            fill: #f8f7f3;
            pointer-events: none;
        }

        .steps-section {
            padding-top: 100px;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .step-card {
            position: relative;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 40px 32px 34px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .step-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-md);
            border-color: rgba(30, 81, 75, 0.18);
        }

        .step-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
        }

        .step-num {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1;
            color: var(--primary);
            opacity: 0.14;
            letter-spacing: -0.04em;
        }

        .step-head i {
            width: 54px;
            height: 54px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 17px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 1.35rem;
        }

        .step-card h3 {
            font-size: 1.35rem;
            margin-bottom: 14px;
        }

        .step-card p {
            color: var(--muted);
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .step-card a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--primary);
            transition: gap 0.25s ease, color 0.25s ease;
        }

        .step-card a:hover {
            color: var(--accent-deep);
            gap: 12px;
        }

        .step-card .tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 4px;
            margin-bottom: 18px;
        }

        .tag-row span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-soft);
            border-radius: 999px;
            padding: 5px 13px;
        }

        .usage-section {
            background:
                radial-gradient(circle at 96% 4%, rgba(193, 147, 90, 0.08), transparent 22%),
                radial-gradient(circle at 4% 96%, rgba(30, 81, 75, 0.07), transparent 24%),
                var(--surface);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
            align-items: stretch;
        }

        .scenario-card {
            display: flex;
            flex-direction: column;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .scenario-card:hover {
            transform: translateY(-7px);
            box-shadow: var(--shadow-md);
        }

        .scenario-media {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--soft);
        }

        .scenario-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .scenario-card:hover .scenario-media img {
            transform: scale(1.05);
        }

        .scenario-content {
            padding: 28px 28px 32px;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            flex: 1;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 999px;
            background: var(--accent-soft);
            color: var(--accent-deep);
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .scenario-card p {
            color: var(--muted);
            margin-bottom: 6px;
        }

        .scenario-card.scenario-solid {
            background: linear-gradient(150deg, var(--primary), var(--primary-deep));
            border-color: transparent;
            color: #fff;
            padding: 38px 30px;
            justify-content: flex-start;
        }

        .scenario-solid .chip {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .scenario-solid h3 {
            color: #fff;
            font-size: 1.45rem;
        }

        .scenario-solid p {
            color: rgba(255, 255, 255, 0.8);
        }

        .solid-icon {
            width: 58px;
            height: 58px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 18px;
            background: rgba(255, 255, 255, 0.16);
            color: #f3dcb7;
            font-size: 1.5rem;
            margin-bottom: 24px;
        }

        .check-list {
            margin-top: 16px;
            display: grid;
            gap: 10px;
        }

        .check-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.9);
            font-weight: 500;
        }

        .check-list li i {
            color: #f3dcb7;
            font-size: 0.9rem;
        }

        .troubleshooting-section {
            position: relative;
            color: #fff;
            background-image:
                linear-gradient(105deg, rgba(15, 42, 39, 0.96), rgba(18, 55, 50, 0.9)),
                url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 120px 0;
        }

        .trouble-wrap {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 72px;
            align-items: center;
        }

        .trouble-copy h2 {
            color: #fff;
            margin-bottom: 18px;
        }

        .trouble-copy p {
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 30px;
            font-size: 1.06rem;
        }

        .trouble-list li {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.14);
        }

        .trouble-list li:last-child {
            border-bottom: 0;
        }

        .trouble-list li > span {
            flex: none;
            font-weight: 900;
            color: #e8c99c;
            letter-spacing: 0.02em;
            font-size: 0.95rem;
            padding-top: 4px;
        }

        .trouble-list strong {
            display: block;
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 4px;
        }

        .trouble-list p {
            color: rgba(255, 255, 255, 0.72);
            margin: 0;
            font-size: 0.97rem;
        }

        .faq-section {
            padding-bottom: 100px;
        }

        .faq-list {
            max-width: 920px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .faq-item[open] {
            border-color: rgba(30, 81, 75, 0.18);
            box-shadow: var(--shadow-md);
        }

        .faq-item > summary {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 22px 26px;
            font-weight: 700;
            font-size: 1.07rem;
            color: var(--ink);
            transition: background 0.25s ease;
        }

        .faq-item > summary:hover {
            background: #fbfaf7;
        }

        .faq-item > summary i {
            margin-left: auto;
            color: var(--accent);
            transition: transform 0.3s ease;
        }

        .faq-item[open] > summary i {
            transform: rotate(180deg);
        }

        .faq-body {
            padding: 0 28px 26px;
            color: var(--muted);
        }

        .faq-body p {
            margin-bottom: 0;
        }

        .cta-section {
            padding-top: 0;
        }

        .cta-box {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            background:
                radial-gradient(circle at 90% 15%, rgba(255, 255, 255, 0.16), transparent 28%),
                linear-gradient(115deg, var(--primary), var(--primary-deep));
            border-radius: clamp(24px, 4vw, 44px);
            padding: 56px 58px;
            color: #fff;
            box-shadow: var(--shadow-lg);
            flex-wrap: wrap;
        }

        .cta-text {
            flex: 1 1 420px;
        }

        .cta-text h2 {
            color: #fff;
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 14px;
        }

        .cta-text p {
            color: rgba(255, 255, 255, 0.8);
            margin: 0;
            max-width: 620px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .site-footer {
            background: #122b28;
            color: #c9d8d3;
            margin-top: 110px;
            padding-top: 74px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.9fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand .footer-logo {
            font-size: 1.35rem;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, 0.62);
            font-size: 0.95rem;
            max-width: 420px;
            margin-bottom: 0;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1.02rem;
            margin-bottom: 16px;
            font-weight: 700;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.64);
            padding: 6px 0;
            font-size: 0.95rem;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .footer-col a:hover {
            color: #f0d7ae;
            padding-left: 6px;
        }

        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 900;
            letter-spacing: -0.02em;
        }

        .footer-logo .logo-mark {
            box-shadow: none;
            background: rgba(255, 255, 255, 0.16);
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 22px 0;
        }

        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
        }

        .footer-bottom p {
            margin: 0;
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        .header-cta:focus-visible,
        .footer-col a:focus-visible,
        .faq-item > summary:focus-visible {
            outline: 3px solid rgba(200, 154, 98, 0.55);
            outline-offset: 3px;
            border-radius: 10px;
        }

        @media (max-width: 1100px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 50px;
            }

            .hero-note {
                grid-template-columns: repeat(3, 1fr);
            }

            .quick-note-card {
                flex-direction: column;
            }

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

            .scenario-card.scenario-solid {
                min-height: 320px;
            }

            .trouble-wrap {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .cta-box {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 1024px) {
            .main-nav {
                position: absolute;
                top: calc(var(--header-h) - 1px);
                left: 0;
                right: 0;
                display: none;
                flex-direction: column;
                align-items: stretch;
                background: #fff;
                border-bottom: 1px solid var(--line);
                padding: 16px 22px 22px;
                gap: 8px;
                box-shadow: 0 28px 44px rgba(25, 50, 46, 0.12);
            }

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

            .main-nav .nav-link {
                justify-content: flex-start;
                padding: 0.9rem 1.1rem;
                border-radius: 16px;
                font-size: 1.02rem;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .header-cta {
                display: none;
            }

            .section {
                padding: 88px 0;
            }

            .troubleshooting-section {
                padding: 90px 0;
            }
        }

        @media (max-width: 768px) {
            body {
                font-size: 16px;
            }

            .container {
                width: min(100% - 32px, var(--container));
            }

            .usage-hero {
                padding: 90px 0 98px;
            }

            .hero-inner {
                gap: 38px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .hero-note {
                grid-template-columns: 1fr;
            }

            .steps-grid,
            .scenario-grid {
                grid-template-columns: 1fr;
            }

            .steps-section {
                padding-top: 84px;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom-inner {
                justify-content: center;
                text-align: center;
            }

            .cta-box {
                padding: 40px 28px;
            }

            .cta-actions {
                width: 100%;
            }

            .cta-actions .btn {
                flex: 1 1 100%;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: 70px 0;
            }

            .usage-hero {
                padding: 78px 0 88px;
            }

            .logo {
                font-size: 1.18rem;
            }

            .logo-mark {
                width: 34px;
                height: 34px;
                border-radius: 11px;
            }

            .step-card {
                padding: 32px 24px;
            }

            .scenario-content {
                padding: 24px 22px;
            }

            .faq-item > summary {
                padding: 18px 20px;
                font-size: 1rem;
            }

            .faq-body {
                padding: 0 20px 20px;
            }

            .hero-wave {
                height: 44px;
            }

            .hero-lead {
                font-size: 1rem;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation: none !important;
                transition: none !important;
            }

            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category3 */
:root {
            --c-primary: #123f3a;
            --c-primary-light: #285b54;
            --c-gold: #d39b4a;
            --c-bg: #fbfaf7;
            --c-surface: #ffffff;
            --c-soft: #f3f2ec;
            --c-deep: #0d2523;
            --c-text: #1f272b;
            --c-muted: #647177;
            --c-border: #e7e3da;
            --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --radius: 18px;
            --radius-lg: 28px;
            --shadow-sm: 0 2px 10px rgba(40, 45, 48, .05);
            --shadow-md: 0 18px 50px rgba(40, 45, 48, .10);
            --transition: .22s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-base);
            background: var(--c-bg);
            color: var(--c-text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        p,
        ul,
        ol,
        figure {
            margin: 0;
            padding: 0;
        }

        ul,
        ol {
            list-style: none;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input,
        textarea {
            font-family: inherit;
        }

        ::selection {
            background: rgba(211, 155, 74, .25);
        }

        .skip-link {
            position: absolute;
            left: -9999px;
            top: 0;
            z-index: 100;
            padding: 10px 16px;
            background: var(--c-deep);
            color: #fff;
            border-radius: 0 0 12px 0;
        }

        .skip-link:focus {
            left: 0;
        }

        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
        }

        section {
            scroll-margin-top: 80px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(255, 255, 255, .88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--c-border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 22px;
            height: 74px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: .01em;
            color: var(--c-primary);
            flex-shrink: 0;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--c-primary), #27635b);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 6px 16px rgba(18, 63, 58, .2);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 2px;
            margin-left: auto;
        }

        .main-nav .nav-link {
            padding: 10px 18px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 15px;
            color: var(--c-text);
            transition: background var(--transition), color var(--transition);
        }

        .main-nav .nav-link:hover {
            background: rgba(18, 63, 58, .08);
            color: var(--c-primary);
        }

        .main-nav .nav-link.is-active {
            background: var(--c-primary);
            color: #fff;
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 19px;
            border-radius: 999px;
            background: rgba(211, 155, 74, .15);
            color: var(--c-primary);
            font-weight: 700;
            font-size: 14px;
            white-space: nowrap;
            transition: background var(--transition), color var(--transition);
        }

        .header-cta:hover {
            background: var(--c-gold);
            color: #fff;
        }

        .header-cta i {
            font-size: 16px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            border: 1px solid var(--c-border);
            background: var(--c-surface);
            align-items: center;
        }

        .nav-toggle span {
            width: 19px;
            height: 2px;
            border-radius: 4px;
            background: var(--c-primary);
            transition: transform var(--transition), opacity var(--transition);
        }

        .site-header.nav-open .nav-toggle span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

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

        .site-header.nav-open .nav-toggle span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .category-hero {
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #f4f0e7 0%, #eef4ef 55%, #e5ede8 100%);
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-position: center 30%;
            background-size: cover;
            opacity: .09;
            z-index: 0;
            pointer-events: none;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            bottom: -110px;
            left: 10%;
            width: 520px;
            height: 220px;
            background: rgba(255, 255, 255, .35);
            filter: blur(60px);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.04fr .96fr;
            align-items: center;
            gap: 56px;
            padding-top: 92px;
            padding-bottom: 92px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 15px;
            border-radius: 999px;
            background: rgba(18, 63, 58, .1);
            color: var(--c-primary);
            font-weight: 700;
            font-size: 14px;
            letter-spacing: .04em;
        }

        .hero-title {
            font-size: clamp(32px, 4.4vw, 50px);
            line-height: 1.2;
            margin-top: 22px;
            color: var(--c-deep);
            font-weight: 800;
            letter-spacing: -.02em;
        }

        .hero-subtitle {
            margin-top: 20px;
            font-size: 17px;
            color: var(--c-muted);
            max-width: 580px;
            line-height: 1.9;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 32px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 700;
            line-height: 1.2;
            border: 1px solid transparent;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
        }

        .btn:active {
            transform: translateY(1px) scale(.99);
        }

        .btn-primary {
            background: var(--c-primary);
            color: #fff;
            box-shadow: 0 12px 26px rgba(18, 63, 58, .22);
        }

        .btn-primary:hover {
            background: #0b302d;
            transform: translateY(-2px);
            box-shadow: 0 16px 34px rgba(18, 63, 58, .3);
        }

        .btn-outline {
            background: rgba(255, 255, 255, .7);
            color: var(--c-primary);
            border-color: rgba(18, 63, 58, .3);
        }

        .btn-outline:hover {
            background: var(--c-surface);
            border-color: var(--c-primary);
            transform: translateY(-2px);
        }

        .btn-light {
            background: #fff;
            color: var(--c-primary);
        }

        .btn-light:hover {
            background: var(--c-gold);
            color: #fff;
            transform: translateY(-2px);
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 34px;
            color: var(--c-text);
            font-size: 14px;
            font-weight: 600;
        }

        .hero-tags li {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .hero-tags i {
            color: var(--c-gold);
        }

        .hero-visual {
            position: relative;
        }

        .hero-photo-card {
            background: var(--c-surface);
            padding: 12px;
            border: 1px solid rgba(255, 255, 255, .8);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            transform: rotate(1.6deg);
            transition: transform .4s ease;
        }

        .hero-visual:hover .hero-photo-card {
            transform: rotate(0deg) translateY(-4px);
        }

        .hero-photo-card img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            border-radius: 20px;
        }

        .hero-note {
            position: absolute;
            left: -12px;
            bottom: 30px;
            right: -12px;
            margin: 0;
            padding: 18px 22px;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, .9);
            border-radius: 18px;
            font-size: 14px;
            color: var(--c-muted);
            box-shadow: 0 16px 40px rgba(28, 32, 36, .14);
            line-height: 1.7;
        }

        .hero-note strong {
            display: block;
            color: var(--c-primary);
            font-size: 15px;
            margin-bottom: 2px;
        }

        .section {
            padding: 96px 0;
        }

        .section-alt {
            background: var(--c-soft);
        }

        .section-head {
            max-width: 760px;
            margin-bottom: 50px;
        }

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

        .section-title {
            font-size: clamp(29px, 3vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--c-deep);
            margin-top: 14px;
            letter-spacing: -.015em;
        }

        .section-desc {
            margin-top: 16px;
            color: var(--c-muted);
            font-size: 17px;
            line-height: 1.9;
        }

        .cat-card-grid {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 22px;
        }

        .cat-card {
            background: var(--c-surface);
            padding: 30px 24px;
            border: 1px solid var(--c-border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(18, 63, 58, .22);
        }

        .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            border-radius: 14px;
            background: linear-gradient(145deg, rgba(18, 63, 58, .1), rgba(211, 155, 74, .12));
            color: var(--c-primary);
            font-size: 19px;
        }

        .cat-card h3 {
            font-size: 20px;
            margin: 20px 0 10px;
            color: var(--c-primary);
            line-height: 1.35;
        }

        .cat-card p {
            color: var(--c-muted);
            font-size: 14.5px;
            line-height: 1.8;
        }

        .card-list {
            margin-top: 16px;
            display: grid;
            gap: 7px;
        }

        .card-list li {
            position: relative;
            color: var(--c-text);
            font-size: 14px;
            padding-left: 20px;
        }

        .card-list li::before {
            content: "·";
            position: absolute;
            left: 4px;
            color: var(--c-gold);
            font-size: 18px;
            top: -2px;
        }

        .process-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }

        .process-item {
            background: var(--c-surface);
            padding: 28px 22px 24px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--c-border);
            position: relative;
            counter-increment: step;
            transition: box-shadow var(--transition), transform var(--transition);
        }

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

        .process-item::after {
            content: "0" counter(step);
            position: absolute;
            right: 20px;
            top: 14px;
            font-size: 46px;
            font-weight: 800;
            color: rgba(18, 63, 58, .07);
            line-height: 1;
            letter-spacing: -.04em;
        }

        .process-item h3 {
            font-size: 18px;
            color: var(--c-text);
            margin-bottom: 10px;
            padding-right: 40px;
            line-height: 1.4;
        }

        .process-item p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.85;
        }

        .scene-section {
            background: linear-gradient(120deg, #eef4f0, #f7f3ea 75%);
        }

        .scene-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .scene-media {
            position: relative;
        }

        .scene-media img {
            width: 100%;
            height: 440px;
            object-fit: cover;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }

        .scene-media-tag {
            position: absolute;
            left: 22px;
            right: 22px;
            bottom: 22px;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(8px);
            padding: 14px 18px;
            border-radius: 16px;
            font-size: 14px;
            color: var(--c-muted);
            box-shadow: 0 12px 28px rgba(22, 24, 26, .15);
        }

        .scene-media-tag strong {
            color: var(--c-primary);
            display: block;
        }

        .scene-list {
            margin-top: 26px;
            display: grid;
            gap: 16px;
        }

        .scene-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: rgba(255, 255, 255, .7);
            border: 1px solid rgba(255, 255, 255, .8);
            padding: 15px 17px;
            border-radius: 16px;
            font-size: 15px;
            line-height: 1.7;
        }

        .scene-list i {
            color: var(--c-gold);
            font-size: 17px;
            margin-top: 5px;
        }

        .faq-section {
            background: var(--c-surface);
        }

        .faq-layout {
            max-width: 880px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--c-bg);
            border: 1px solid var(--c-border);
            border-radius: 20px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
        }

        .faq-item[open] {
            background: var(--c-surface);
            border-color: rgba(18, 63, 58, .22);
            box-shadow: var(--shadow-sm);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 22px 26px;
            font-weight: 800;
            font-size: 16.5px;
            color: var(--c-text);
            cursor: pointer;
            list-style: none;
            line-height: 1.5;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--c-primary);
        }

        .faq-icon {
            flex: 0 0 auto;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(18, 63, 58, .1);
            color: var(--c-primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: transform var(--transition), background var(--transition);
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
            background: var(--c-primary);
            color: #fff;
        }

        .faq-answer {
            padding: 0 26px 24px;
            color: var(--c-muted);
            font-size: 15.5px;
            line-height: 1.9;
            border-top: 1px dashed rgba(18, 63, 58, .12);
            margin: 0 26px 0 26px;
            padding: 18px 0 20px;
        }

        .cta-panel {
            position: relative;
            overflow: hidden;
            border-radius: 32px;
            padding: 72px 60px;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            isolation: isolate;
            text-align: center;
        }

        .cta-panel::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(13, 37, 35, .96), rgba(18, 63, 58, .86));
            z-index: -1;
        }

        .cta-panel .cta-inner {
            position: relative;
            z-index: 1;
            color: #fff;
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-panel h2 {
            font-size: clamp(27px, 3vw, 38px);
            font-weight: 800;
            line-height: 1.25;
        }

        .cta-panel p {
            margin-top: 16px;
            color: rgba(255, 255, 255, .86);
            font-size: 16px;
            line-height: 1.9;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            margin-top: 32px;
        }

        .cta-actions .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .4);
        }

        .cta-actions .btn-outline:hover {
            background: #fff;
            color: var(--c-primary);
            border-color: #fff;
        }

        .site-footer {
            background: var(--c-deep);
            color: rgba(255, 255, 255, .78);
            margin-top: 96px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-top: 70px;
            padding-bottom: 54px;
        }

        .footer-brand .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            font-size: 24px;
            font-weight: 800;
            color: #fff;
        }

        .footer-brand .logo-mark {
            background: linear-gradient(135deg, #fff, var(--c-gold));
            color: var(--c-primary);
        }

        .footer-brand p {
            max-width: 360px;
            margin-top: 18px;
            font-size: 14.5px;
            color: rgba(255, 255, 255, .62);
            line-height: 1.9;
        }

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

        .footer-col h4 {
            color: #fff;
            font-size: 17px;
            margin-bottom: 8px;
        }

        .footer-col a {
            font-size: 14.5px;
            color: rgba(255, 255, 255, .68);
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--c-gold);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 22px 0;
        }

        .footer-bottom-inner {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
        }

        @media (max-width: 1024px) {
            .hero-inner {
                gap: 34px;
                padding-top: 72px;
                padding-bottom: 72px;
            }

            .hero-title {
                font-size: 40px;
            }

            .cat-card-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }

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

            .scene-wrap {
                gap: 40px;
            }

            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 920px) {
            .main-nav {
                position: fixed;
                top: 74px;
                left: 0;
                right: 0;
                margin: 0;
                background: var(--c-surface);
                flex-direction: column;
                align-items: stretch;
                padding: 18px 24px 26px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, .07);
                border-bottom: 1px solid var(--c-border);
                opacity: 0;
                pointer-events: none;
                transform: translateY(-10px);
                transition: opacity var(--transition), transform var(--transition);
                z-index: -1;
            }

            .site-header.nav-open .main-nav {
                opacity: 1;
                pointer-events: auto;
                transform: translateY(0);
            }

            .main-nav .nav-link {
                padding: 14px 18px;
                border-radius: 14px;
            }

            .nav-toggle {
                display: flex;
            }

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

        @media (max-width: 768px) {
            .section {
                padding: 74px 0;
            }

            .hero-inner,
            .scene-wrap {
                grid-template-columns: 1fr;
                gap: 48px;
            }

            .hero-inner {
                padding-top: 60px;
                padding-bottom: 66px;
            }

            .hero-photo-card img {
                height: 320px;
            }

            .cat-card-grid,
            .process-wrap {
                grid-template-columns: 1fr;
            }

            .section-head {
                margin-bottom: 38px;
            }

            .cta-panel {
                padding: 54px 26px;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 34px;
                padding-top: 54px;
            }
        }

        @media (max-width: 540px) {
            .container {
                padding: 0 18px;
            }

            .header-inner {
                gap: 10px;
            }

            .header-cta {
                display: none;
            }

            .nav-toggle {
                margin-left: auto;
            }

            .logo {
                font-size: 21px;
            }

            .logo-mark {
                width: 32px;
                height: 32px;
                border-radius: 10px;
                font-size: 16px;
            }

            .hero-title {
                font-size: 32px;
            }

            .hero-subtitle {
                font-size: 16px;
            }

            .hero-actions,
            .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero-actions .btn,
            .cta-actions .btn {
                width: 100%;
            }

            .hero-note {
                position: static;
                margin-top: 18px;
            }

            .hero-photo-card img {
                height: 250px;
            }

            .scene-list li {
                padding: 12px 14px;
                font-size: 14px;
            }

            .cta-panel {
                border-radius: 22px;
                padding: 44px 20px;
            }

            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }