/* roulang page: index */
:root {
            --brand-primary: #c9a84c;
            --brand-secondary: #1a248f;
            --brand-dark: #2c2416;
            --brand-light: #f8f6f0;
            --text-primary: #1a1a1a;
            --text-secondary: #555555;
            --text-muted: #888888;
            --border-light: #e8e5dc;
            --border-medium: #d5d0c5;
            --bg-page: #fdfdfc;
            --bg-card: #ffffff;
            --bg-warm: #faf9f5;
            --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 2px 16px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.14);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-2xl: 1.5rem;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.45s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--brand-primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* Container */
        .container-custom {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 768px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Sticky Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: #ffffff;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-normal);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.10);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 62px;
            gap: 20px;
        }
        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--brand-dark);
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #c9a84c 0%, #e5c76b 50%, #b8922f 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 900;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: nowrap;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--brand-primary);
            background: #fdf8ee;
        }
        .nav-links a.active {
            color: #ffffff;
            background: var(--brand-primary);
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(201, 168, 76, 0.35);
        }
        .nav-links a.active:hover {
            color: #ffffff;
            background: #b8922f;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            padding: 9px 20px;
            background: var(--brand-primary);
            color: #fff;
            border-radius: 25px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(201, 168, 76, 0.3);
        }
        .btn-nav-cta:hover {
            background: #b8922f;
            box-shadow: 0 4px 16px rgba(201, 168, 76, 0.45);
            transform: translateY(-1px);
            color: #fff;
        }

        /* Mobile menu toggle */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            z-index: 101;
        }
        .mobile-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--brand-dark);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Mobile nav panel */
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 62px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #fff;
            z-index: 99;
            flex-direction: column;
            padding: 24px 20px;
            gap: 6px;
            overflow-y: auto;
            border-top: 1px solid var(--border-light);
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel a {
            display: block;
            padding: 14px 18px;
            border-radius: 10px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }
        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            background: #fdf8ee;
            color: var(--brand-primary);
            font-weight: 600;
        }
        .mobile-nav-panel .btn-nav-cta {
            margin-top: 12px;
            text-align: center;
            justify-content: center;
            border-radius: 28px;
            padding: 13px 24px;
            font-size: 1rem;
        }

        @media (max-width: 920px) {
            .nav-links {
                display: none;
            }
            .nav-actions .btn-nav-cta {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .nav-inner {
                height: 56px;
            }
            .mobile-nav-panel {
                top: 56px;
            }
        }
        @media (min-width: 921px) {
            .mobile-nav-panel {
                display: none !important;
            }
            .mobile-toggle {
                display: none !important;
            }
        }

        /* Section spacing */
        .section {
            padding: 64px 0;
        }
        .section-sm {
            padding: 40px 0;
        }
        .section-lg {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 40px 0;
            }
            .section-lg {
                padding: 52px 0;
            }
            .section-sm {
                padding: 28px 0;
            }
        }

        /* Section titles */
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--brand-primary);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--brand-dark);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.55rem;
            }
            .section-desc {
                font-size: 0.95rem;
            }
        }

        /* Cards */
        .card-base {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            transition: all var(--transition-normal);
            overflow: hidden;
        }
        .card-base:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: #d5cfc2;
        }
        .card-clickable {
            cursor: pointer;
        }
        .card-clickable:focus-visible {
            outline: 3px solid var(--brand-primary);
            outline-offset: 2px;
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: var(--brand-primary);
            color: #fff;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-fast);
            box-shadow: 0 3px 14px rgba(201, 168, 76, 0.32);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: #b8922f;
            box-shadow: 0 6px 22px rgba(201, 168, 76, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:focus-visible {
            outline: 3px solid #b8922f;
            outline-offset: 3px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border: 2px solid var(--brand-primary);
            color: var(--brand-primary);
            border-radius: 28px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            background: transparent;
        }
        .btn-outline:hover {
            background: #fdf8ee;
            border-color: #b8922f;
            color: #b8922f;
            transform: translateY(-1px);
        }
        .btn-outline:focus-visible {
            outline: 3px solid #b8922f;
            outline-offset: 3px;
        }

        /* Tag / Badge */
        .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 500;
            background: #fdf8ee;
            color: #b8922f;
            letter-spacing: 0.03em;
        }
        .tag-highlight {
            background: var(--brand-primary);
            color: #fff;
            font-weight: 600;
        }

        /* Stat number */
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--brand-dark);
            line-height: 1.1;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Hero */
        .hero-section {
            position: relative;
            padding: 72px 0 80px;
            background: linear-gradient(170deg, #fdfbf4 0%, #f8f3e6 30%, #fefdfa 60%, #faf7ef 100%);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -120px;
            width: 520px;
            height: 520px;
            background: radial-gradient(circle, rgba(201, 168, 76, 0.10) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-bg-img {
            position: absolute;
            right: 0;
            top: 0;
            width: 48%;
            height: 100%;
            object-fit: cover;
            opacity: 0.18;
            pointer-events: none;
            mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.5) 0%, transparent 100%);
            -webkit-mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.5) 0%, transparent 100%);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 44px 0 52px;
            }
            .hero-bg-img {
                width: 100%;
                opacity: 0.10;
                mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.3) 0%, transparent 100%);
                -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.3) 0%, transparent 100%);
            }
            .hero-section::before {
                width: 300px;
                height: 300px;
                right: -60px;
                top: -30px;
            }
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 18px 0;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border-light);
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--brand-dark);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition-fast);
        }
        .faq-item:hover .faq-question {
            color: var(--brand-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-fast);
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 600px;
            padding-top: 10px;
        }
        .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition-fast);
            font-size: 1.3rem;
            color: var(--brand-primary);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }

        /* Footer */
        .site-footer {
            background: #1c1a16;
            color: #c5c0b8;
            padding: 48px 0 28px;
        }
        .site-footer a {
            color: #c5c0b8;
            transition: color var(--transition-fast);
        }
        .site-footer a:hover {
            color: var(--brand-primary);
        }
        .footer-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: #f0ebe0;
        }

        /* Image card overlay */
        .img-card-overlay {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
        }
        .img-card-overlay img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .img-card-overlay:hover img {
            transform: scale(1.04);
        }
        .img-card-overlay .overlay-content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px;
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.75));
            color: #fff;
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #f5f5f0;
        }
        ::-webkit-scrollbar-thumb {
            background: #d5cfc2;
            border-radius: 3px;
        }

        /* Focus visible */
        :focus-visible {
            outline: 2px solid var(--brand-primary);
            outline-offset: 2px;
        }

        /* Partner logo placeholder */
        .partner-item {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px 28px;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            font-weight: 600;
            color: var(--text-muted);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            min-height: 72px;
        }
        .partner-item:hover {
            border-color: var(--brand-primary);
            color: var(--brand-primary);
            box-shadow: var(--shadow-md);
        }

/* roulang page: category1 */
:root {
      --primary: #0a1f3f;
      --primary-light: #132d56;
      --accent: #c8a45c;
      --accent-hover: #b8943c;
      --bg: #f5f3ee;
      --bg-white: #ffffff;
      --text: #1e1e1e;
      --text-soft: #5c5c5c;
      --text-muted: #8a857d;
      --border: #e0dcd5;
      --border-light: #ece8e0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
      --shadow: 0 4px 12px rgba(0,0,0,0.06);
      --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);
      --radius-sm: 8px;
      --radius: 14px;
      --radius-lg: 20px;
      --transition: 0.2s ease;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      line-height: 1.6;
      color: var(--text);
      background: var(--bg);
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    button, input { font-family: inherit; }
    .container-custom {
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    @media (max-width: 768px) {
      .container-custom { padding-left: 16px; padding-right: 16px; }
    }

    /* HEADER / NAV */
    .site-header {
      background: var(--bg-white);
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: var(--shadow-sm);
      backdrop-filter: blur(8px);
      background: rgba(255,255,255,0.96);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      padding-top: 12px;
      padding-bottom: 12px;
    }
    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 0.02em;
      white-space: nowrap;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i { color: var(--accent); font-size: 1.6rem; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
      flex-wrap: wrap;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text);
      padding: 6px 0;
      border-bottom: 2px solid transparent;
      transition: color var(--transition), border-color var(--transition);
      white-space: nowrap;
    }
    .nav-links a:hover { color: var(--accent); }
    .nav-links a.active {
      color: var(--primary);
      border-bottom-color: var(--accent);
      font-weight: 600;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--primary);
      cursor: pointer;
      padding: 4px 8px;
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0.5rem;
        margin-top: 10px;
      }
      .nav-links.open { display: flex; }
      .mobile-toggle { display: block; }
    }

    /* HERO BANNER */
    .section-hero {
      background: linear-gradient(135deg, #0a1f3f 0%, #162d50 100%);
      color: #fff;
      padding: 60px 0 64px;
      position: relative;
      overflow: hidden;
    }
    .section-hero::after {
      content: '';
      position: absolute;
      top: -40px;
      right: -60px;
      width: 320px;
      height: 320px;
      background: radial-gradient(circle, rgba(200,164,92,0.2) 0%, transparent 70%);
      border-radius: 50%;
    }
    .hero-content { position: relative; z-index: 2; }
    .hero-badge {
      display: inline-block;
      background: rgba(200,164,92,0.15);
      color: var(--accent);
      font-size: 0.8rem;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 20px;
      letter-spacing: 0.03em;
      margin-bottom: 16px;
    }
    .hero-title { font-size: 2.4rem; font-weight: 700; line-height: 1.3; margin-bottom: 14px; }
    .hero-desc { font-size: 1.05rem; color: #c0c8d4; max-width: 640px; line-height: 1.7; }
    @media (max-width: 768px) {
      .hero-title { font-size: 1.7rem; }
      .section-hero { padding: 40px 0 44px; }
    }

    /* MAIN LAYOUT */
    .main-content { padding: 48px 0 60px; }
    .grid-2col { display: grid; grid-template-columns: 1fr 320px; gap: 32px; align-items: start; }
    @media (max-width: 1024px) {
      .grid-2col { grid-template-columns: 1fr; }
    }

    /* CARDS */
    .card {
      background: var(--bg-white);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 24px;
      transition: box-shadow var(--transition), transform var(--transition);
      border: 1px solid var(--border-light);
    }
    .card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
    .card-img { border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 14px; }
    .card-tag {
      display: inline-block;
      background: #eef2f8;
      color: var(--primary);
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 14px;
      margin-bottom: 8px;
    }
    .card-title { font-size: 1.15rem; font-weight: 650; margin-bottom: 6px; color: var(--primary); }
    .card-text { font-size: 0.9rem; color: var(--text-soft); line-height: 1.5; }
    .card-meta { font-size: 0.8rem; color: var(--text-muted); margin-top: 8px; }

    /* SIDEBAR */
    .sidebar-card {
      background: var(--bg-white);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 20px;
      border: 1px solid var(--border-light);
      margin-bottom: 24px;
    }
    .sidebar-title {
      font-size: 1rem;
      font-weight: 650;
      color: var(--primary);
      margin-bottom: 12px;
      border-left: 4px solid var(--accent);
      padding-left: 12px;
    }
    .list-item {
      padding: 10px 0;
      border-bottom: 1px dashed var(--border-light);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
    }
    .list-item:last-child { border-bottom: none; }
    .hot-badge {
      background: #fef3e0;
      color: #b85c1e;
      font-size: 0.7rem;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: 10px;
    }

    /* BUTTONS */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      font-weight: 600;
      padding: 10px 20px;
      border-radius: 30px;
      transition: all var(--transition);
      cursor: pointer;
      font-size: 0.9rem;
      border: none;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: var(--shadow-sm);
    }
    .btn-primary:hover { background: var(--primary-light); box-shadow: var(--shadow); }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover { background: var(--primary); color: #fff; }
    .btn-accent {
      background: var(--accent);
      color: #1e1e1e;
    }
    .btn-accent:hover { background: var(--accent-hover); }

    /* FOOTER */
    .site-footer {
      background: var(--primary);
      color: #c0c8d4;
      padding: 40px 0 24px;
      font-size: 0.9rem;
    }
    .footer-brand { font-size: 1.3rem; font-weight: 700; color: #fff; }
    .site-footer a { color: #c0c8d4; transition: color var(--transition); }
    .site-footer a:hover { color: var(--accent); }

    /* PAGINATION */
    .pagination { display: flex; justify-content: center; gap: 8px; margin-top: 28px; }
    .page-item {
      width: 36px; height: 36px;
      display: flex; align-items: center; justify-content: center;
      border-radius: 8px; background: #fff; border: 1px solid var(--border);
      font-weight: 500; font-size: 0.9rem; transition: all var(--transition);
    }
    .page-item.active { background: var(--primary); color: #fff; border-color: var(--primary); }
    .page-item:hover:not(.active) { border-color: var(--accent); color: var(--accent); }

    .divider { height: 1px; background: var(--border-light); margin: 32px 0; }
    .section-title {
      font-size: 1.6rem; font-weight: 700; color: var(--primary);
      margin-bottom: 24px; display: flex; align-items: center; gap: 10px;
    }
    .section-title i { color: var(--accent); }

/* roulang page: category2 */
:root {
            --color-brand-900: #1B3A5C;
            --color-brand-800: #1f4268;
            --color-brand-700: #234b75;
            --color-accent-500: #C8A45C;
            --color-accent-400: #d4b87a;
            --color-surface: #F5F4F1;
            --color-muted: #8a857d;
            --color-text-soft: #6b6560;
            --color-text: #1a1a1a;
            --color-border: #e5e2dc;
            --radius-xl: 1rem;
            --radius-2xl: 1.25rem;
            --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.06), 0 0 0 1px rgba(0, 0, 0, 0.03);
            --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.10), 0 2px 8px rgba(0, 0, 0, 0.05);
            --transition-smooth: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            line-height: 1.7;
            color: #1a1a1a;
            background-color: #ffffff;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-smooth);
        }

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

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

        input {
            font-family: inherit;
        }

        .container-custom {
            max-width: 1220px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: #ffffff;
            border-bottom: 1px solid #e8e5df;
            box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
            transition: box-shadow var(--transition-smooth);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 62px;
            gap: 1.5rem;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.25rem;
            color: #1B3A5C;
            white-space: nowrap;
            letter-spacing: 0.02em;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: linear-gradient(135deg, #1B3A5C 0%, #234b75 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 0.25rem;
            align-items: center;
            flex-wrap: nowrap;
        }
        .nav-links li a {
            display: block;
            padding: 0.5rem 0.9rem;
            font-size: 0.925rem;
            font-weight: 500;
            color: #4a4540;
            border-radius: 0.5rem;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.01em;
        }
        .nav-links li a:hover {
            color: #1B3A5C;
            background: #f7f5f0;
        }
        .nav-links li a.active {
            color: #1B3A5C;
            font-weight: 600;
            background: #eef2f7;
        }
        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: #C8A45C;
            border-radius: 3px;
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            padding: 0.5rem;
            color: #1B3A5C;
            font-size: 1.5rem;
            line-height: 1;
        }
        .nav-search-sm {
            display: none;
        }

        /* Footer */
        .site-footer {
            background: #1B3A5C;
            color: #d5d2cb;
            padding: 3rem 0 1.5rem;
            font-size: 0.925rem;
        }
        .site-footer a {
            color: #d5d2cb;
            transition: color var(--transition-smooth);
        }
        .site-footer a:hover {
            color: #C8A45C;
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1.2rem;
            color: #e0dcd5;
        }

        /* Hero Banner */
        .hero-banner {
            position: relative;
            background: #1B3A5C;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 380px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27, 58, 92, 0.88) 0%, rgba(27, 58, 92, 0.72) 40%, rgba(15, 34, 56, 0.65) 100%);
            z-index: 1;
        }
        .hero-banner .hero-content {
            position: relative;
            z-index: 2;
            color: #fff;
            padding: 3rem 0;
        }

        /* Cards */
        .card-query {
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            overflow: hidden;
            border: 1px solid #eae7e0;
        }
        .card-query:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: #d9d3c4;
        }
        .card-query .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #f0ede7;
        }
        .card-query .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .card-query:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .card-query .card-body {
            padding: 1.25rem 1.25rem 1.5rem;
        }

        /* Stat card */
        .stat-card {
            background: #fff;
            border-radius: var(--radius-xl);
            padding: 1.75rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid #eae7e0;
            transition: all var(--transition-smooth);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: #C8A45C;
        }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: #1B3A5C;
            line-height: 1.1;
            letter-spacing: -0.02em;
        }
        .stat-label {
            color: #6b6560;
            font-size: 0.9rem;
            margin-top: 0.35rem;
            font-weight: 500;
        }

        /* Step */
        .step-item {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            padding: 1.25rem 0;
            border-bottom: 1px solid #ebe7df;
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #1B3A5C;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid #e5e2dc;
            border-radius: var(--radius-xl);
            margin-bottom: 0.75rem;
            overflow: hidden;
            background: #fff;
            transition: all var(--transition-smooth);
        }
        .faq-item:hover {
            border-color: #d0cbc0;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .faq-question {
            padding: 1.1rem 1.5rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #1B3A5C;
            font-size: 1rem;
            user-select: none;
            background: #fafaf8;
            transition: background var(--transition-smooth);
        }
        .faq-question:hover {
            background: #f3f1ec;
        }
        .faq-answer {
            padding: 0 1.5rem 1.25rem;
            color: #4a4540;
            line-height: 1.8;
            font-size: 0.95rem;
        }
        .faq-toggle-icon {
            transition: transform var(--transition-smooth);
            font-size: 0.8rem;
            color: #8a857d;
            flex-shrink: 0;
        }
        .faq-item.open .faq-toggle-icon {
            transform: rotate(180deg);
            color: #C8A45C;
        }

        /* CTA block */
        .cta-block {
            background: linear-gradient(135deg, #1B3A5C 0%, #1f4268 40%, #234b75 100%);
            border-radius: var(--radius-2xl);
            padding: 3rem 2rem;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(200, 164, 92, 0.12);
            pointer-events: none;
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: #C8A45C;
            color: #fff;
            font-weight: 600;
            padding: 0.7rem 1.6rem;
            border-radius: 0.6rem;
            border: none;
            transition: all var(--transition-smooth);
            font-size: 0.95rem;
            letter-spacing: 0.01em;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: #b89245;
            box-shadow: 0 4px 16px rgba(200, 164, 92, 0.35);
            transform: translateY(-1px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: transparent;
            color: #1B3A5C;
            font-weight: 600;
            padding: 0.65rem 1.5rem;
            border-radius: 0.6rem;
            border: 1.5px solid #1B3A5C;
            transition: all var(--transition-smooth);
            font-size: 0.95rem;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: #1B3A5C;
            color: #fff;
        }
        .btn-light {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: #fff;
            color: #1B3A5C;
            font-weight: 600;
            padding: 0.7rem 1.6rem;
            border-radius: 0.6rem;
            border: none;
            transition: all var(--transition-smooth);
            font-size: 0.95rem;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-light:hover {
            box-shadow: 0 4px 20px rgba(255, 255, 255, 0.3);
            transform: translateY(-1px);
        }

        /* Tag */
        .tag {
            display: inline-block;
            padding: 0.2rem 0.65rem;
            font-size: 0.78rem;
            font-weight: 500;
            border-radius: 1rem;
            background: #eef2f7;
            color: #1B3A5C;
            letter-spacing: 0.02em;
        }
        .tag-accent {
            background: #fdf6e8;
            color: #8a6d2b;
        }

        /* Section titles */
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: #1a1a1a;
            letter-spacing: 0.01em;
            margin-bottom: 0.5rem;
        }
        .section-subtitle {
            color: #6b6560;
            font-size: 1rem;
            font-weight: 400;
            max-width: 600px;
            line-height: 1.6;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: #C8A45C;
            margin-bottom: 0.5rem;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container-custom {
                padding-left: 1.25rem;
                padding-right: 1.25rem;
            }
            .nav-links li a {
                padding: 0.45rem 0.6rem;
                font-size: 0.85rem;
            }
            .hero-banner {
                min-height: 300px;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .stat-number {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 56px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 56px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 1rem 1.25rem;
                border-bottom: 2px solid #e8e5df;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
                gap: 0.3rem;
                z-index: 99;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                padding: 0.7rem 1rem;
                font-size: 0.95rem;
                border-radius: 0.5rem;
                width: 100%;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .hero-banner {
                min-height: 260px;
            }
            .hero-banner .hero-content {
                padding: 2rem 0;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .cta-block {
                padding: 2rem 1.25rem;
                border-radius: 1rem;
            }
            .stat-card {
                padding: 1.25rem 1rem;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .card-query .card-body {
                padding: 1rem;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding-left: 0.9rem;
                padding-right: 0.9rem;
            }
            .hero-banner {
                min-height: 220px;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .btn-primary,
            .btn-outline,
            .btn-light {
                padding: 0.55rem 1.1rem;
                font-size: 0.85rem;
            }
            .faq-question {
                padding: 0.9rem 1rem;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 1rem 1rem;
                font-size: 0.85rem;
            }
            .logo-link {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
                border-radius: 6px;
            }
        }

/* roulang page: category4 */
:root {
            --color-brand-600: #1a3a5c;
            --color-brand-700: #152f4a;
            --color-brand-800: #0f2438;
            --color-gold-400: #dbb04e;
            --color-gold-500: #c9a03a;
            --color-gold-600: #b0882d;
            --color-warm-100: #f5f2ed;
            --color-warm-200: #ebe4d8;
            --color-warm-300: #dcd1bd;
            --color-text-primary: #1c1917;
            --color-text-secondary: #57534e;
            --color-text-muted: #8a857d;
            --color-bg-cream: #fafaf8;
            --color-bg-warm: #f5f2ed;
            --color-border-light: #e7e0d5;
            --color-border-strong: #d5ccc0;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.09), 0 4px 10px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 14px 40px rgba(0, 0, 0, 0.11), 0 6px 16px rgba(0, 0, 0, 0.06);
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.28s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            color: var(--color-text-primary);
            background-color: #fdfdfc;
            margin: 0;
            padding: 0;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }

        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        @media (min-width: 640px) {
            .container-custom {
                padding-left: 1.75rem;
                padding-right: 1.75rem;
            }
        }
        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 2.25rem;
                padding-right: 2.25rem;
            }
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: #fff;
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-smooth);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-top-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.7rem 0;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .header-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--color-brand-600);
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .header-brand .brand-icon {
            width: 2rem;
            height: 2rem;
            background: var(--color-brand-600);
            color: #fff;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .header-brand:hover {
            color: var(--color-brand-700);
        }
        .nav-links {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 0.15rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-links li a {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 0.9rem;
            border-radius: var(--radius-sm);
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-links li a:hover {
            color: var(--color-brand-600);
            background-color: #f5f2ed;
        }
        .nav-links li a.active {
            color: var(--color-brand-600);
            background-color: #eef3f7;
            font-weight: 600;
        }
        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0.9rem;
            right: 0.9rem;
            height: 2.5px;
            background: var(--color-gold-500);
            border-radius: 2px 2px 0 0;
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: 1px solid var(--color-border-strong);
            border-radius: var(--radius-sm);
            padding: 0.5rem 0.65rem;
            cursor: pointer;
            color: var(--color-text-secondary);
            font-size: 1.35rem;
            line-height: 1;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }
        .mobile-menu-toggle:hover {
            background: #f5f2ed;
            color: var(--color-brand-600);
        }
        .mobile-menu-toggle:focus-visible {
            outline: 2px solid var(--color-brand-600);
            outline-offset: 2px;
        }
        @media (max-width: 1023px) {
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                border-top: 1px solid var(--color-border-light);
                padding: 0.5rem 0;
                gap: 0;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                box-shadow: var(--shadow-md);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                z-index: 99;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                padding: 0.7rem 1.5rem;
                border-radius: 0;
                width: 100%;
            }
            .nav-links li a.active::after {
                display: none;
            }
            .nav-links li a.active {
                border-left: 4px solid var(--color-gold-500);
                background-color: #eef3f7;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .header-top-row {
                position: relative;
            }
        }

        /* Footer */
        .site-footer {
            background-color: #1c1917;
            color: #d6d0c8;
            padding: 3rem 1.25rem 1.5rem;
            margin-top: 4rem;
        }
        .site-footer .footer-brand {
            font-weight: 700;
            font-size: 1.2rem;
            color: #e0dcd5;
            letter-spacing: 0.03em;
        }
        .site-footer a {
            color: #c4beb4;
            transition: color var(--transition-fast);
        }
        .site-footer a:hover {
            color: #e8d9b0;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 0.4rem;
        }

        /* Article card hover */
        .article-card {
            transition: all var(--transition-smooth);
        }
        .article-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }
        .article-card:hover .article-card-img img {
            transform: scale(1.04);
        }
        .article-card-img {
            overflow: hidden;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .article-card-img img {
            transition: transform 0.4s ease;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Featured article large */
        .featured-article:hover .featured-img img {
            transform: scale(1.03);
        }
        .featured-img {
            overflow: hidden;
            border-radius: var(--radius-lg);
        }
        .featured-img img {
            transition: transform 0.45s ease;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Tag / Badge */
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.7rem;
            border-radius: 9999px;
            font-size: 0.78rem;
            font-weight: 500;
            letter-spacing: 0.01em;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .tag-pill:hover {
            opacity: 0.85;
        }

        /* Stat card */
        .stat-card {
            transition: all var(--transition-smooth);
        }
        .stat-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* FAQ item */
        .faq-item {
            border-bottom: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }
        .faq-item summary {
            cursor: pointer;
            padding: 1.1rem 0;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text-primary);
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            transition: color var(--transition-fast);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            color: var(--color-brand-600);
        }
        .faq-item summary .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition-fast);
            font-size: 0.85rem;
            color: var(--color-text-muted);
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
            color: var(--color-gold-500);
        }
        .faq-item .faq-answer {
            padding-bottom: 1.1rem;
            color: var(--color-text-secondary);
            line-height: 1.75;
            font-size: 0.95rem;
        }

        /* Newsletter CTA */
        .newsletter-cta {
            background: linear-gradient(135deg, #1a3a5c 0%, #152f4a 40%, #0f2438 100%);
            border-radius: var(--radius-xl);
            overflow: hidden;
            position: relative;
        }
        .newsletter-cta::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(219, 176, 78, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .newsletter-input {
            border: 1px solid rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border-radius: var(--radius-md);
            padding: 0.7rem 1rem;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            width: 100%;
            outline: none;
        }
        .newsletter-input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .newsletter-input:focus {
            border-color: var(--color-gold-400);
            background: rgba(255, 255, 255, 0.14);
            box-shadow: 0 0 0 3px rgba(219, 176, 78, 0.15);
        }

        /* Scrollbar subtle */
        ::-webkit-scrollbar {
            width: 7px;
        }
        ::-webkit-scrollbar-track {
            background: #f5f2ed;
        }
        ::-webkit-scrollbar-thumb {
            background: #c8b89a;
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #b5a07a;
        }

        /* Focus visible */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--color-brand-600);
            outline-offset: 2px;
            border-radius: 2px;
        }

        @media (max-width: 640px) {
            .header-brand {
                font-size: 1.1rem;
            }
            .header-brand .brand-icon {
                width: 1.6rem;
                height: 1.6rem;
                font-size: 0.8rem;
            }
            .mobile-menu-toggle {
                font-size: 1.2rem;
                padding: 0.4rem 0.55rem;
            }
        }

/* roulang page: category3 */
:root {
            --color-brand-500: #1a3c5e;
            --color-brand-600: #16304d;
            --color-brand-700: #12273d;
            --color-gold-400: #d4a83a;
            --color-gold-500: #b8891f;
            --color-surface: #f8f7f4;
            --color-warmgray: #6b6560;
            --color-softdark: #2c2825;
            --color-border: #e5e1da;
            --radius-card: 0.85rem;
            --radius-xl: 1.1rem;
            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 2px 8px rgba(0, 0, 0, 0.09), 0 8px 28px rgba(0, 0, 0, 0.06);
            --transition-base: 220ms cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #1a1816;
            background-color: #ffffff;
            min-height: 100vh;
            -webkit-tap-highlight-color: transparent;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-base);
        }

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

        input {
            font-family: inherit;
        }

        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: #ffffff;
            border-bottom: 1px solid #ece8e0;
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.03);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08), 0 8px 20px rgba(0, 0, 0, 0.05);
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        @media (min-width: 768px) {
            .container-custom {
                padding: 0 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container-custom {
                padding: 0 2.5rem;
            }
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 56px;
        }

        @media (min-width: 768px) {
            .header-inner {
                height: 62px;
            }
        }

        .header-logo {
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--color-brand-500);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        @media (min-width: 768px) {
            .header-logo {
                font-size: 1.35rem;
            }
        }

        .header-logo i {
            color: var(--color-gold-400);
            margin-right: 0.35em;
            font-size: 0.9em;
        }

        .nav-links {
            display: none;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 0.15rem;
        }

        @media (min-width: 768px) {
            .nav-links {
                display: flex;
                align-items: center;
            }
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 0.45rem 0.9rem;
            border-radius: 0.5rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: #4a4540;
            transition: all var(--transition-base);
            white-space: nowrap;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--color-brand-500);
            background: #f5f2ed;
        }

        .nav-links a.active {
            color: var(--color-brand-500);
            font-weight: 600;
            background: #eef3f8;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 6px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 2.5px;
            border-radius: 2px;
            background: var(--color-gold-400);
        }

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 0.5rem;
            color: #4a4540;
            font-size: 1.3rem;
            transition: all var(--transition-base);
        }

        .mobile-menu-btn:hover {
            background: #f5f2ed;
            color: var(--color-brand-500);
        }

        @media (min-width: 768px) {
            .mobile-menu-btn {
                display: none;
            }
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #ffffff;
            z-index: 99;
            padding: 1rem 1.25rem;
            flex-direction: column;
            gap: 0.3rem;
            overflow-y: auto;
            border-top: 1px solid #ece8e0;
        }

        .mobile-nav-panel.open {
            display: flex;
        }

        @media (min-width: 768px) {
            .mobile-nav-panel {
                display: none !important;
            }
        }

        .mobile-nav-panel a {
            display: block;
            padding: 0.8rem 1rem;
            border-radius: 0.6rem;
            font-size: 1rem;
            font-weight: 500;
            color: #4a4540;
            transition: all var(--transition-base);
        }

        .mobile-nav-panel a:hover {
            background: #f5f2ed;
            color: var(--color-brand-500);
        }

        .mobile-nav-panel a.active {
            background: #eef3f8;
            color: var(--color-brand-500);
            font-weight: 600;
        }

        /* Hero */
        .page-hero {
            position: relative;
            background: linear-gradient(135deg, #1a3c5e 0%, #0e2438 40%, #12273d 100%);
            padding: 3rem 0;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }

        @media (min-width: 768px) {
            .page-hero {
                padding: 4.5rem 0;
                min-height: 340px;
            }
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            pointer-events: none;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, rgba(255, 255, 255, 0.04), transparent);
            pointer-events: none;
        }

        .page-hero-content {
            position: relative;
            z-index: 2;
            color: #ffffff;
        }

        .page-hero-badge {
            display: inline-block;
            background: rgba(212, 168, 58, 0.2);
            border: 1px solid rgba(212, 168, 58, 0.35);
            color: #f0d68a;
            padding: 0.35rem 1rem;
            border-radius: 2rem;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 1rem;
        }

        .page-hero h1 {
            font-size: 1.8rem;
            font-weight: 800;
            margin: 0 0 0.6rem;
            letter-spacing: -0.01em;
            line-height: 1.25;
        }

        @media (min-width: 768px) {
            .page-hero h1 {
                font-size: 2.5rem;
            }
        }

        @media (min-width: 1024px) {
            .page-hero h1 {
                font-size: 2.8rem;
            }
        }

        .page-hero p {
            font-size: 0.95rem;
            color: #d0d6de;
            max-width: 600px;
            line-height: 1.7;
            margin: 0;
        }

        @media (min-width: 768px) {
            .page-hero p {
                font-size: 1.05rem;
            }
        }

        /* 板块通用 */
        .section {
            padding: 2.5rem 0;
        }

        @media (min-width: 768px) {
            .section {
                padding: 3.5rem 0;
            }
        }

        @media (min-width: 1024px) {
            .section {
                padding: 4.5rem 0;
            }
        }

        .section-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        @media (min-width: 768px) {
            .section-header {
                margin-bottom: 2.8rem;
            }
        }

        .section-header h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #1a1816;
            margin: 0 0 0.5rem;
            letter-spacing: -0.01em;
        }

        @media (min-width: 768px) {
            .section-header h2 {
                font-size: 1.85rem;
            }
        }

        .section-header .subtitle {
            font-size: 0.9rem;
            color: #6b6560;
            max-width: 520px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-divider {
            width: 40px;
            height: 3px;
            background: var(--color-gold-400);
            border-radius: 3px;
            margin: 0.7rem auto 0;
        }

        /* 卡片 */
        .card {
            background: #ffffff;
            border: 1px solid #e8e4dc;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            overflow: hidden;
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: #d8d2c8;
            transform: translateY(-2px);
        }

        .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #f0ece5;
        }

        .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }

        .card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .card-body {
            padding: 1.2rem;
        }

        @media (min-width: 768px) {
            .card-body {
                padding: 1.5rem;
            }
        }

        .card-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 0.2rem 0.65rem;
            border-radius: 1rem;
            background: #eef3f8;
            color: var(--color-brand-500);
            margin-bottom: 0.55rem;
            letter-spacing: 0.02em;
        }

        .card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin: 0 0 0.4rem;
            color: #1a1816;
            line-height: 1.35;
        }

        .card p {
            font-size: 0.85rem;
            color: #6b6560;
            margin: 0;
            line-height: 1.6;
        }

        /* 步骤列表 */
        .step-list {
            list-style: none;
            padding: 0;
            margin: 0;
            counter-reset: step;
        }

        .step-list li {
            counter-increment: step;
            display: flex;
            gap: 1rem;
            padding: 1rem 0;
            border-bottom: 1px solid #ece8e0;
            align-items: flex-start;
        }

        .step-list li:last-child {
            border-bottom: none;
        }

        .step-num {
            flex-shrink: 0;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--color-brand-500);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .step-content h4 {
            margin: 0 0 0.3rem;
            font-size: 1rem;
            font-weight: 600;
            color: #1a1816;
        }

        .step-content p {
            margin: 0;
            font-size: 0.85rem;
            color: #6b6560;
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .faq-item {
            border: 1px solid #e8e4dc;
            border-radius: var(--radius-card);
            overflow: hidden;
            background: #ffffff;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: #d0cbc2;
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 1.1rem 1.2rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: #1a1816;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.8rem;
            background: transparent;
            cursor: pointer;
            transition: all var(--transition-base);
            line-height: 1.45;
        }

        .faq-question:hover {
            color: var(--color-brand-500);
        }

        .faq-question i {
            flex-shrink: 0;
            transition: transform 0.3s ease;
            color: #8a857d;
            font-size: 0.8rem;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-gold-400);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 1.2rem;
            font-size: 0.88rem;
            color: #4a4540;
            line-height: 1.7;
            background: #fcfbf9;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 1.2rem 1.2rem;
        }

        /* CTA */
        .cta-block {
            background: linear-gradient(140deg, #1a3c5e 0%, #12273d 60%, #0e1e30 100%);
            border-radius: var(--radius-xl);
            padding: 2rem 1.5rem;
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        @media (min-width: 768px) {
            .cta-block {
                padding: 3rem 2.5rem;
            }
        }

        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.1;
            pointer-events: none;
        }

        .cta-block>* {
            position: relative;
            z-index: 1;
        }

        .cta-block h2 {
            font-size: 1.4rem;
            font-weight: 700;
            margin: 0 0 0.6rem;
        }

        @media (min-width: 768px) {
            .cta-block h2 {
                font-size: 1.75rem;
            }
        }

        .cta-block p {
            font-size: 0.9rem;
            color: #d0d6de;
            margin: 0 0 1.5rem;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            padding: 0.7rem 1.6rem;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-base);
            letter-spacing: 0.01em;
            white-space: nowrap;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--color-gold-400);
            color: #1a1816;
            box-shadow: 0 2px 8px rgba(212, 168, 58, 0.3);
        }

        .btn-primary:hover {
            background: #c99a2e;
            box-shadow: 0 4px 16px rgba(212, 168, 58, 0.4);
            transform: translateY(-1px);
            color: #1a1816;
        }

        .btn-outline-light {
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            color: #ffffff;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: #ffffff;
            color: #ffffff;
        }

        .btn-sm {
            padding: 0.45rem 1rem;
            font-size: 0.8rem;
            border-radius: 1.5rem;
        }

        /* 技巧卡片 */
        .tip-card {
            background: #fdfcf9;
            border: 1px solid #ece8e0;
            border-radius: var(--radius-card);
            padding: 1.3rem;
            transition: all var(--transition-base);
            height: 100%;
        }

        .tip-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: #d8d2c8;
        }

        .tip-card .tip-icon {
            width: 44px;
            height: 44px;
            border-radius: 0.7rem;
            background: #eef3f8;
            color: var(--color-brand-500);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 0.8rem;
        }

        .tip-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin: 0 0 0.4rem;
            color: #1a1816;
        }

        .tip-card p {
            font-size: 0.82rem;
            color: #6b6560;
            margin: 0;
            line-height: 1.6;
        }

        /* 页脚 */
        .site-footer {
            background: #2c2825;
            color: #c5bfb6;
            padding: 2.5rem 0 1.5rem;
            font-size: 0.88rem;
        }

        @media (min-width: 768px) {
            .site-footer {
                padding: 3.5rem 0 2rem;
            }
        }

        .site-footer a {
            color: #c5bfb6;
            transition: color var(--transition-base);
        }

        .site-footer a:hover {
            color: #f0d68a;
        }

        .footer-brand {
            font-weight: 700;
            font-size: 1.15rem;
            color: #e0dcd5;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 0.45rem;
        }

        .footer-bottom {
            border-top: 1px solid #3a3630;
            padding-top: 1.2rem;
            margin-top: 1.5rem;
            text-align: center;
            font-size: 0.8rem;
            color: #8a857d;
        }

        /* 响应式细节 */
        @media (max-width: 767px) {
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .card-body {
                padding: 1rem;
            }
            .step-num {
                width: 32px;
                height: 32px;
                font-size: 0.8rem;
            }
            .faq-question {
                font-size: 0.88rem;
                padding: 0.9rem 1rem;
            }
            .faq-answer {
                font-size: 0.82rem;
                padding: 0 1rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 1rem 1rem;
            }
        }

        @media (max-width: 520px) {
            .card-img-wrap {
                aspect-ratio: 16 / 11;
            }
            .btn {
                padding: 0.6rem 1.2rem;
                font-size: 0.82rem;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
        }