/* roulang page: index */
:root {
            --primary: #0F766E;
            --primary-hover: #0B5D56;
            --accent: #D97706;
            --accent-hover: #B45309;
            --darkbg: #16211F;
            --lightbg: #F7F5F1;
            --border: #E7E5E0;
            --textmain: #33302C;
            --textsub: #6B6660;
            --success: #10B981;
            --radius-lg: 1rem;
            --radius-2xl: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-card: 0 12px 30px rgba(0,0,0,0.08);
            --shadow-hover: 0 20px 40px rgba(0,0,0,0.12);
            --transition: all 0.3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html,
        body {
            font-family: 'Noto Sans SC', system-ui, -apple-system, BlinkMacSystemFont, 'Microsoft YaHei', sans-serif;
            color: var(--textmain);
            background: var(--lightbg);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img,
        svg {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin: 0 0 0.5em;
        }
        .container-main {
            max-width: 80rem;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) {
            .container-main {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .container-main {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }
        .text-muted {
            color: var(--textsub);
        }
        .section-padding {
            padding: 4rem 0;
        }
        @media (min-width: 768px) {
            .section-padding {
                padding: 6rem 0;
            }
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            border-radius: 0.75rem;
            padding: 0.875rem 2rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            font-size: 1rem;
            line-height: 1.2;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(15, 118, 110, 0.4);
            outline-offset: 2px;
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            border-radius: 0.75rem;
            padding: 0.875rem 2rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            font-size: 1rem;
            line-height: 1.2;
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }
        .btn-accent:focus-visible {
            outline: 3px solid rgba(217, 119, 6, 0.4);
            outline-offset: 2px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            border-radius: 0.75rem;
            padding: 0.875rem 2rem;
            border: 1.5px solid var(--primary);
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
            line-height: 1.2;
        }
        .btn-outline:hover {
            background: rgba(15, 118, 110, 0.06);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }
        .btn-outline:focus-visible {
            outline: 3px solid rgba(15, 118, 110, 0.3);
            outline-offset: 2px;
        }
        .badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            line-height: 1.4;
            letter-spacing: 0.02em;
            background: rgba(15, 118, 110, 0.1);
            color: var(--primary);
        }
        .badge-accent {
            background: rgba(217, 119, 6, 0.12);
            color: var(--accent);
        }
        .badge-dark {
            background: rgba(22, 33, 31, 0.08);
            color: var(--darkbg);
        }
        .card-base {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-2xl);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .card-base:hover {
            box-shadow: var(--shadow-card);
            border-color: #D6D3CF;
            transform: translateY(-4px);
        }
        .stat-number {
            font-variant-numeric: tabular-nums;
            font-weight: 700;
            letter-spacing: -0.02em;
        }
        .bg-grid-pattern {
            background-image: linear-gradient(rgba(51, 48, 44, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(51, 48, 44, 0.04) 1px, transparent 1px);
            background-size: 32px 32px;
        }
        .bg-radial-decor {
            background: radial-gradient(circle at 75% 20%, rgba(15, 118, 110, 0.08) 0%, transparent 35%);
        }
        .bg-dark-pattern {
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 28px 28px;
        }
        .nav-link {
            position: relative;
            font-weight: 500;
            padding: 0.5rem 0.25rem;
            color: var(--textmain);
            transition: color 0.2s;
            border-bottom: 2px solid transparent;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-icon {
            transition: transform 0.3s ease;
        }
        .lock-overlay {
            background: rgba(255, 255, 255, 0.55);
            backdrop-filter: blur(2px);
        }
        .table-scroll {
            overflow-x: auto;
        }
        @media (max-width: 768px) {
            .table-scroll {
                -webkit-overflow-scrolling: touch;
            }
        }
        .mobile-menu {
            transition: transform 0.3s ease;
            transform: translateX(100%);
        }
        .mobile-menu.open {
            transform: translateX(0);
        }
        .footer-link {
            color: rgba(255, 255, 255, 0.72);
            transition: color 0.2s;
            font-size: 0.9375rem;
        }
        .footer-link:hover {
            color: #fff;
        }
        .list-check {
            list-style: none;
            padding-left: 0;
            margin: 0;
        }
        .list-check li {
            padding: 0.35rem 0;
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            font-size: 0.9375rem;
            color: var(--textmain);
        }
        .list-check li::before {
            content: "✓";
            color: var(--success);
            font-weight: 700;
            flex-shrink: 0;
            line-height: 1.5;
        }
        .list-cross li {
            padding: 0.35rem 0;
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            font-size: 0.9375rem;
            color: var(--textsub);
        }
        .list-cross li::before {
            content: "×";
            color: #DC2626;
            font-weight: 700;
            flex-shrink: 0;
            line-height: 1.5;
        }
        .fade-in {
            opacity: 0;
            animation: fadeInUp 0.8s ease forwards;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .delay-100 {
            animation-delay: 0.1s;
        }
        .delay-200 {
            animation-delay: 0.2s;
        }
        .delay-300 {
            animation-delay: 0.3s;
        }
        @media (max-width: 1024px) {
            .desktop-nav {
                display: none;
            }
            .mobile-menu-button {
                display: flex;
            }
        }
        @media (min-width: 1025px) {
            .desktop-nav {
                display: flex;
            }
            .mobile-menu-button {
                display: none;
            }
        }
        .content-card img {
            transition: transform 0.4s ease;
        }
        .content-card:hover img {
            transform: scale(1.04);
        }
        .step-card {
            border: 1px solid var(--border);
            border-radius: var(--radius-2xl);
            background: #fff;
            transition: var(--transition);
        }
        .step-card:hover {
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
            border-color: #D6D3CF;
        }
        .timeline-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
            margin-top: 0.5rem;
            box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.15);
        }
        .quote-block {
            border-left: 4px solid var(--accent);
            background: rgba(217, 119, 6, 0.05);
            border-radius: 0 1rem 1rem 0;
            padding: 1.5rem 1.75rem;
        }
        @media (max-width: 640px) {
            .hero-title {
                font-size: 2rem !important;
                line-height: 1.25 !important;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .container-main {
                padding-left: 1.25rem;
                padding-right: 1.25rem;
            }
            .btn-primary,
            .btn-accent,
            .btn-outline {
                padding: 0.75rem 1.5rem;
                font-size: 0.95rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0F766E;
            --primary-dark: #0B5D56;
            --accent: #D97706;
            --accent-light: #F59E0B;
            --bg-light: #F7F5F1;
            --bg-dark: #16211F;
            --border: #E7E5E0;
            --text-main: #33302C;
            --text-sub: #6B6660;
            --radius: 1rem;
            --radius-lg: 1.25rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-card: 0 12px 30px rgba(0,0,0,0.08);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            color: var(--text-main);
            background-color: #fff;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 640px) {
            .container-main {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container-main {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* ===== Header Navigation ===== */
        .desktop-nav {
            display: none;
            align-items: center;
            gap: 2rem;
            font-size: 0.95rem;
        }

        @media (min-width: 1024px) {
            .desktop-nav {
                display: flex;
            }
        }

        .nav-link {
            font-weight: 500;
            color: var(--text-main);
            padding: 0.5rem 0;
            position: relative;
            transition: color 0.2s ease;
        }

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

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--primary);
            color: #fff;
            font-weight: 600;
            border-radius: 0.75rem;
            padding: 0.75rem 1.5rem;
            transition: all 0.2s ease;
            border: none;
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-card);
        }

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

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--accent);
            color: #fff;
            font-weight: 600;
            border-radius: 0.75rem;
            padding: 0.75rem 1.5rem;
            transition: all 0.2s ease;
            border: none;
        }

        .btn-accent:hover {
            background-color: #B45309;
            transform: translateY(-1px);
            box-shadow: var(--shadow-card);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: transparent;
            color: var(--text-main);
            font-weight: 500;
            border-radius: 0.75rem;
            padding: 0.75rem 1.5rem;
            border: 1px solid var(--border);
            transition: all 0.2s ease;
        }

        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: rgba(15, 118, 110, 0.04);
        }

        /* ===== Mobile Menu ===== */
        .mobile-menu-button {
            display: flex;
        }

        @media (min-width: 1024px) {
            .mobile-menu-button {
                display: none;
            }
        }

        .mobile-menu {
            position: fixed;
            top: 0;
            right: 0;
            width: 300px;
            height: 100vh;
            background: #fff;
            z-index: 1000;
            padding: 2rem 1.5rem;
            box-shadow: -8px 0 30px rgba(0, 0, 0, 0.12);
            transform: translateX(100%);
            transition: transform 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 1rem;
            overflow-y: auto;
        }

        .mobile-menu.open {
            transform: translateX(0);
        }

        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.35);
            z-index: 999;
            display: none;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .mobile-menu-overlay.open {
            display: block;
            opacity: 1;
        }

        .mobile-menu-link {
            font-weight: 500;
            color: var(--text-main);
            padding: 0.75rem 0.5rem;
            border-radius: 0.5rem;
            transition: all 0.2s ease;
            font-size: 1.05rem;
        }

        .mobile-menu-link:hover {
            background-color: rgba(15, 118, 110, 0.05);
            color: var(--primary);
        }

        .mobile-menu-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .mobile-menu-close {
            position: absolute;
            top: 1rem;
            right: 1rem;
            width: 2rem;
            height: 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.5rem;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text-main);
            font-size: 1.25rem;
            transition: all 0.2s ease;
        }

        .mobile-menu-close:hover {
            background-color: var(--bg-light);
        }

        /* ===== Hero Section ===== */
        .hero-section {
            background-color: var(--bg-light);
            background-image:
                linear-gradient(rgba(15, 118, 110, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(15, 118, 110, 0.04) 1px, transparent 1px);
            background-size: 40px 40px;
            position: relative;
            overflow: hidden;
            padding: 5rem 0 4rem;
        }

        @media (min-width: 768px) {
            .hero-section {
                padding: 7rem 0 5rem;
            }
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(15, 118, 110, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background-color: rgba(15, 118, 110, 0.08);
            border: 1px solid rgba(15, 118, 110, 0.2);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.85rem;
            padding: 0.375rem 0.875rem;
            border-radius: 9999px;
            letter-spacing: 0.02em;
        }

        .hero-stat {
            padding: 1rem 1.5rem;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            text-align: center;
        }

        .hero-stat .stat-num {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }

        .hero-stat .stat-label {
            font-size: 0.875rem;
            color: var(--text-sub);
            margin-top: 0.25rem;
        }

        .hero-image-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            min-height: 320px;
            display: flex;
            align-items: flex-end;
        }

        .hero-image-wrap::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(22, 33, 31, 0.6) 0%, transparent 60%);
        }

        .hero-image-caption {
            position: relative;
            z-index: 1;
            padding: 1.5rem;
            color: #fff;
        }

        .hero-image-caption .tag {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.6rem;
            border-radius: 0.375rem;
            letter-spacing: 0.03em;
            margin-bottom: 0.5rem;
        }

        .hero-image-caption p {
            font-size: 0.95rem;
            opacity: 0.9;
            max-width: 300px;
        }

        /* ===== Section Headings ===== */
        .section-tag {
            display: inline-block;
            background-color: rgba(15, 118, 110, 0.08);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 1.875rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin-top: 0.75rem;
        }

        .section-subtitle {
            color: var(--text-sub);
            font-size: 1rem;
            max-width: 560px;
            line-height: 1.7;
        }

        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
        }

        /* ===== Benefit Cards ===== */
        .benefit-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.75rem;
            transition: all 0.25s ease;
        }

        .benefit-card:hover {
            border-color: #d6d3ce;
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }

        .benefit-card .icon-wrap {
            width: 3rem;
            height: 3rem;
            border-radius: 0.875rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.25rem;
        }

        .benefit-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 0.5rem;
        }

        .benefit-card p {
            font-size: 0.95rem;
            color: var(--text-sub);
            line-height: 1.65;
        }

        /* ===== Levels Section ===== */
        .levels-section {
            background-color: var(--bg-dark);
            background-image: repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.015) 0px, rgba(255, 255, 255, 0.015) 1px, transparent 1px, transparent 14px);
            padding: 4rem 0;
        }

        @media (min-width: 768px) {
            .levels-section {
                padding: 5rem 0;
            }
        }

        .level-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 2rem;
            color: #fff;
            transition: all 0.3s ease;
            position: relative;
        }

        .level-card:hover {
            border-color: rgba(217, 119, 6, 0.5);
            transform: translateY(-4px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        }

        .level-card.recommended {
            background: rgba(15, 118, 110, 0.25);
            border-color: rgba(15, 118, 110, 0.4);
        }

        .level-card .level-name {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 0.375rem;
        }

        .level-card .level-desc {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            margin-bottom: 1.25rem;
        }

        .level-card .level-price {
            font-size: 2rem;
            font-weight: 700;
            font-variant-numeric: tabular-nums;
            margin-bottom: 1.25rem;
            color: #fff;
        }

        .level-card .level-price span {
            font-size: 0.9rem;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.5);
        }

        .level-card ul {
            list-style: none;
            margin: 0;
            padding: 0;
            space-y: 0.5rem;
        }

        .level-card ul li {
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.8);
            padding: 0.35rem 0;
        }

        .level-card ul li .check {
            color: var(--success);
            flex-shrink: 0;
        }

        .level-card ul li.dim {
            color: rgba(255, 255, 255, 0.35);
        }

        .level-badge {
            position: absolute;
            top: -12px;
            right: 1.5rem;
            background: var(--accent);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.875rem;
            border-radius: 9999px;
            letter-spacing: 0.04em;
            box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
        }

        .level-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-weight: 500;
            border-radius: 0.75rem;
            padding: 0.75rem 1rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: all 0.2s ease;
            margin-top: 1.5rem;
        }

        .level-btn:hover {
            background: var(--accent);
            border-color: var(--accent);
        }

        .level-btn.primary {
            background: var(--primary);
            border-color: var(--primary);
        }

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

        /* ===== Scene Cards ===== */
        .scene-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all 0.25s ease;
        }

        .scene-card:hover {
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
            border-color: #d6d3ce;
        }

        .scene-card .scene-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .scene-card .scene-body {
            padding: 1.5rem;
        }

        .scene-card .scene-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 0.5rem;
        }

        .scene-card .scene-body p {
            font-size: 0.95rem;
            color: var(--text-sub);
            line-height: 1.65;
        }

        /* ===== Flow Steps ===== */
        .flow-step {
            position: relative;
            padding-left: 3.5rem;
            padding-bottom: 2.5rem;
        }

        .flow-step:last-child {
            padding-bottom: 0;
        }

        .flow-step::before {
            content: '';
            position: absolute;
            left: 1.25rem;
            top: 2.75rem;
            width: 2px;
            height: calc(100% - 3.5rem);
            background: var(--border);
        }

        .flow-step:last-child::before {
            display: none;
        }

        .flow-step .step-num {
            position: absolute;
            left: 0;
            top: 0;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 9999px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            font-variant-numeric: tabular-nums;
            box-shadow: 0 4px 12px rgba(15, 118, 110, 0.2);
        }

        .flow-step h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 0.35rem;
        }

        .flow-step p {
            font-size: 0.95rem;
            color: var(--text-sub);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.25rem 0;
            background: none;
            border: none;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            transition: color 0.2s ease;
        }

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

        .faq-question .icon {
            width: 1.5rem;
            height: 1.5rem;
            border-radius: 9999px;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 0.875rem;
            color: var(--text-sub);
            transition: all 0.3s ease;
        }

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

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

        .faq-answer-inner {
            padding-bottom: 1.25rem;
            font-size: 0.95rem;
            color: var(--text-sub);
            line-height: 1.7;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background-color: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(22, 33, 31, 0.85);
        }

        .cta-section .container-main {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.05rem;
            max-width: 520px;
            margin: 1rem auto 0;
        }

        /* ===== Footer ===== */
        .footer-link {
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.2s ease;
            font-size: 0.95rem;
        }

        .footer-link:hover {
            color: #fff;
        }

        /* ===== Responsive Nuance ===== */
        @media (max-width: 767px) {
            .hero-image-wrap {
                min-height: 240px;
                margin-top: 2rem;
            }

            .section-title {
                font-size: 1.625rem;
            }

            .level-card {
                padding: 1.5rem;
            }

            .level-card .level-price {
                font-size: 1.5rem;
            }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            .hero-image-wrap {
                min-height: 280px;
            }
        }

/* roulang page: article */
:root {
    --primary: #0F766E;
    --primary-dark: #0B5D56;
    --accent: #D97706;
    --dark-bg: #16211F;
    --light-bg: #F7F5F1;
    --border-light: #E7E5E0;
    --text-main: #33302C;
    --text-muted: #6B6660;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-hover: 0 12px 30px rgba(0,0,0,0.08);
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    background: #fff;
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
.container-main {
    max-width: 80rem;
    margin: 0 auto;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
}
@media (min-width: 640px) {
    .container-main { padding-left: 1.5rem; padding-right: 1.5rem; }
}
@media (min-width: 1024px) {
    .container-main { padding-left: 2rem; padding-right: 2rem; }
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(15, 118, 110, 0.18);
    white-space: nowrap;
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}
.btn-primary:focus-visible {
    outline: 3px solid rgba(15, 118, 110, 0.3);
    outline-offset: 2px;
}
.btn-accent {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: #fff;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
    box-shadow: 0 4px 16px rgba(217, 119, 6, 0.25);
    white-space: nowrap;
}
.btn-accent:hover {
    background: #b86606;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(217, 119, 6, 0.3);
}
.btn-accent:focus-visible {
    outline: 3px solid rgba(217, 119, 6, 0.3);
    outline-offset: 2px;
}
.btn-outline-light {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255,255,255,0.35);
    color: #fff;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.btn-outline-light:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.08);
    transform: translateY(-2px);
}
.nav-link {
    position: relative;
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.2s;
    padding: 0.25rem 0;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -3px;
    height: 2px;
    background: var(--primary);
    border-radius: var(--radius-full);
}
.desktop-nav {
    display: none;
    align-items: center;
    gap: 2rem;
}
@media (min-width: 1024px) {
    .desktop-nav { display: flex; }
}
.mobile-menu-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    color: var(--text-main);
    transition: all 0.2s;
}
.mobile-menu-button:hover { border-color: var(--primary); color: var(--primary); }
@media (min-width: 1024px) {
    .mobile-menu-button { display: none; }
}
.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-top: 1px solid var(--border-light);
    box-shadow: var(--shadow-hover);
    padding: 1rem;
    z-index: 40;
}
.mobile-menu.open { display: block; }
@media (min-width: 1024px) {
    .mobile-menu { display: none !important; }
}
.mobile-menu .nav-link {
    padding: 0.75rem 0;
    font-size: 1rem;
    border-bottom: 1px solid #f0eeea;
}
.footer-link {
    color: rgba(255,255,255,0.6);
    font-size: 0.875rem;
    transition: color 0.2s;
    display: inline-block;
}
.footer-link:hover { color: #fff; }
.article-content {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-main);
    word-break: break-word;
}
.article-content p {
    margin-bottom: 1.5rem;
    letter-spacing: 0.01em;
}
.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 2.25rem;
    margin-bottom: 1rem;
    color: var(--text-main);
    letter-spacing: -0.01em;
}
.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}
.article-content ul,
.article-content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 0.5rem; }
.article-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.article-content a:hover { color: var(--primary-dark); }
.article-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 0.75rem 1.5rem;
    background: var(--light-bg);
    border-radius: 0 0.75rem 0.75rem 0;
    margin-bottom: 1.5rem;
    color: var(--text-muted);
    font-style: normal;
}
.article-content img {
    border-radius: var(--radius-lg);
    margin: 1.75rem 0;
    width: 100%;
    height: auto;
    object-fit: cover;
    box-shadow: var(--shadow-card);
}
.article-content strong {
    font-weight: 700;
    color: var(--text-main);
}
.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.faq-item { transition: background-color 0.2s; }
.faq-item:hover { background: rgba(247, 245, 241, 0.6); }
.faq-item .faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.3s ease;
}
.faq-item.open .faq-content {
    padding-top: 0;
    padding-bottom: 1.25rem;
}
.faq-toggle:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: -2px;
    border-radius: 0.5rem;
}

/* roulang page: category2 */
:root {
            --primary: #0F766E;
            --primary-hover: #0B5D56;
            --accent: #D97706;
            --accent-hover: #B45309;
            --dark-bg: #16211F;
            --light-bg: #F7F5F1;
            --border: #E7E5E0;
            --text-main: #33302C;
            --text-sub: #6B6660;
            --white: #ffffff;
            --radius-lg: 1rem;
            --radius-md: 0.75rem;
            --shadow-card: 0 12px 30px rgba(0, 0, 0, 0.08);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background-color: var(--light-bg);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            display: block;
            max-width: 100%;
            height: auto;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        .container-main {
            max-width: 80rem;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) {
            .container-main {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-main {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        .desktop-nav {
            display: none;
        }
        @media (min-width: 1024px) {
            .desktop-nav {
                display: flex;
            }
        }
        .nav-link {
            position: relative;
            font-weight: 500;
            color: var(--text-sub);
            padding: 0.25rem 0;
            transition: color .2s;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active:after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            border-radius: 2px;
            background-color: var(--primary);
        }
        .btn-primary,
        .btn-accent,
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.375rem;
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 0.6875rem 1.375rem;
            border-radius: 9999px;
            transition: all .25s ease;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(15, 118, 110, 0.25);
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            box-shadow: 0 6px 18px rgba(15, 118, 110, 0.3);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(15, 118, 110, 0.2);
        }
        .btn-accent {
            background-color: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(217, 119, 6, 0.25);
        }
        .btn-accent:hover {
            background-color: var(--accent-hover);
            box-shadow: 0 6px 18px rgba(217, 119, 6, 0.3);
            transform: translateY(-1px);
        }
        .btn-accent:active {
            transform: translateY(0);
        }
        .btn-outline {
            border: 1.5px solid var(--border);
            color: var(--text-main);
            background: transparent;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(15, 118, 110, 0.04);
        }
        .mobile-menu {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 1000;
            padding: 2rem 1.5rem;
            box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
            transition: right 0.35s ease;
        }
        .mobile-menu.open {
            right: 0;
        }
        .mobile-menu .menu-close-btn {
            align-self: flex-end;
            width: 2.25rem;
            height: 2.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.5rem;
            border: 1px solid var(--border);
            color: var(--text-main);
            margin-bottom: 1.25rem;
        }
        .mobile-menu-link {
            padding: 0.75rem 0.875rem;
            border-radius: 0.625rem;
            font-weight: 500;
            color: var(--text-sub);
            border-bottom: 1px solid rgba(231, 229, 224, 0.5);
            transition: background .2s, color .2s;
        }
        .mobile-menu-link:hover {
            background: rgba(15, 118, 110, 0.06);
            color: var(--primary);
        }
        .mobile-menu-link.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(15, 118, 110, 0.06);
        }
        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(22, 33, 31, 0.5);
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transition: opacity .3s;
        }
        .mobile-menu-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }
        .footer-link {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
            transition: color .2s;
        }
        .footer-link:hover {
            color: #fff;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.25rem 0;
            font-size: 1.0625rem;
            font-weight: 600;
            color: var(--text-main);
            background: transparent;
            text-align: left;
            gap: 1rem;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 1.75rem;
            height: 1.75rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 9999px;
            border: 1px solid var(--border);
            color: var(--primary);
            font-size: 1.125rem;
            transition: transform .3s, background .3s, color .3s;
            font-weight: 400;
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .35s ease;
            color: var(--text-sub);
            line-height: 1.75;
            padding: 0;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 1.25rem;
        }
        .card-hover {
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: #d8d5cc;
        }
        .section-padding {
            padding-top: 4rem;
            padding-bottom: 4rem;
        }
        @media (min-width: 768px) {
            .section-padding {
                padding-top: 5.5rem;
                padding-bottom: 5.5rem;
            }
        }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8125rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 0.75rem;
        }
        .eyebrow span {
            width: 1.5rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .dark-section {
            background-color: var(--dark-bg);
            color: #fff;
        }
        .hero-banner {
            position: relative;
            background-image: linear-gradient(90deg,
                    rgba(22, 33, 31, 0.88) 0%,
                    rgba(22, 33, 31, 0.72) 55%,
                    rgba(22, 33, 31, 0.45) 100%),
                url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            padding-top: 5rem;
            padding-bottom: 5rem;
        }
        @media (min-width: 768px) {
            .hero-banner {
                padding-top: 6.5rem;
                padding-bottom: 6.5rem;
            }
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 9999px;
            padding: 0.375rem 0.875rem;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(4px);
        }
        .quote-card {
            position: relative;
            border-left: 4px solid var(--accent);
            background: #fff;
            border-radius: 0.75rem;
            padding: 1.5rem 2rem;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.04);
        }
        .timeline-item {
            position: relative;
            padding-left: 2.5rem;
            padding-bottom: 2.25rem;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: 0.6875rem;
            top: 1.75rem;
            bottom: 0;
            width: 1px;
            background: var(--border);
        }
        .timeline-item:last-child:before {
            display: none;
        }
        .timeline-dot {
            position: absolute;
            left: 0;
            top: 0.25rem;
            width: 1.5rem;
            height: 1.5rem;
            border-radius: 9999px;
            background: #fff;
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1;
        }
        .timeline-dot span {
            width: 0.375rem;
            height: 0.375rem;
            border-radius: 9999px;
            background: var(--primary);
        }
        .timeline-item:last-child .timeline-dot {
            border-color: var(--accent);
        }
        .timeline-item:last-child .timeline-dot span {
            background: var(--accent);
        }
        .stat-number {
            font-size: 2.25rem;
            font-weight: 700;
            line-height: 1.1;
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.02em;
        }
        @media (min-width: 768px) {
            .stat-number {
                font-size: 2.75rem;
            }
        }
        .img-wrap {
            overflow: hidden;
            border-radius: 0.75rem;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
        }
        .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .img-wrap:hover img {
            transform: scale(1.03);
        }
        .service-item:nth-child(even) .service-content-row {
            flex-direction: row-reverse;
        }
        @media (max-width: 1023px) {
            .service-item:nth-child(even) .service-content-row {
                flex-direction: column;
            }
        }
        .service-content-row {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        @media (max-width: 1023px) {
            .service-content-row {
                flex-direction: column;
                align-items: stretch;
            }
        }
        .cta-section {
            background-color: var(--dark-bg);
            background-image: radial-gradient(circle at 20% 30%, rgba(15, 118, 110, 0.25) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, rgba(217, 119, 6, 0.16) 0%, transparent 40%);
            color: #fff;
        }
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        @media (max-width: 640px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-padding {
                padding-top: 3rem;
                padding-bottom: 3rem;
            }
            .hero-banner {
                padding-top: 3.5rem;
                padding-bottom: 3.5rem;
            }
            .timeline-item {
                padding-left: 2rem;
            }
        }