/* roulang page: index */
:root {
            --primary: #0a1f3b;
            --primary-light: #152d54;
            --primary-dark: #06152a;
            --accent: #c8963e;
            --accent-light: #d9a94e;
            --accent-dark: #a87a2e;
            --bg: #ffffff;
            --bg-light: #f6f7f9;
            --bg-card: #ffffff;
            --bg-dark: #0a1f3b;
            --text: #1a1d23;
            --text-soft: #4b5563;
            --text-light: #6b7280;
            --text-on-dark: #e5e7eb;
            --text-on-primary: #ffffff;
            --border: #e2e5ea;
            --border-light: #eef0f3;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
            --transition: 0.25s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --header-height: 64px;
            --nav-sub-height: 44px;
            --max-width: 1200px;
        }

        *,
        *::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: var(--font-sans);
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        input {
            font-family: inherit;
            outline: none;
        }

        /* ===== 容器 ===== */
        .container-custom {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (min-width: 1280px) {
            .container-custom {
                padding: 0 32px;
            }
        }

        /* ===== 吸顶导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #ffffff;
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition);
            will-change: box-shadow;
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-lg);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 24px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: -0.5px;
        }
        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 24px;
            padding: 8px 16px;
            gap: 8px;
            border: 1px solid transparent;
            transition: all var(--transition);
            min-width: 200px;
        }
        .header-search:focus-within {
            border-color: var(--accent);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(200, 150, 62, 0.1);
        }
        .header-search input {
            border: none;
            background: transparent;
            font-size: 0.9rem;
            color: var(--text);
            width: 100%;
            min-width: 120px;
        }
        .header-search input::placeholder {
            color: var(--text-light);
        }
        .header-search .search-icon {
            color: var(--text-light);
            font-size: 0.85rem;
        }
        .btn-header {
            padding: 9px 20px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-header-outline {
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-header-outline:hover {
            background: var(--primary);
            color: #fff;
        }
        .btn-header-filled {
            background: var(--accent);
            color: #fff;
            border: 2px solid var(--accent);
        }
        .btn-header-filled:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(200, 150, 62, 0.35);
        }

        /* 导航子行 */
        .nav-sub-row {
            background: var(--primary);
            height: var(--nav-sub-height);
            display: flex;
            align-items: center;
        }
        .nav-sub-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            height: 100%;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-sub-inner::-webkit-scrollbar {
            display: none;
        }
        .nav-link {
            display: flex;
            align-items: center;
            height: 100%;
            padding: 0 18px;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.9rem;
            font-weight: 500;
            white-space: nowrap;
            border-bottom: 3px solid transparent;
            transition: all var(--transition);
            position: relative;
            letter-spacing: 0.2px;
        }
        .nav-link:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-link.active {
            color: #ffffff;
            border-bottom-color: var(--accent);
            font-weight: 600;
        }
        .nav-hot-tag {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 0.7rem;
            padding: 2px 7px;
            border-radius: 10px;
            margin-left: 6px;
            font-weight: 700;
            letter-spacing: 0.5px;
            animation: pulse-tag 2s ease-in-out infinite;
        }
        @keyframes pulse-tag {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 6px;
            cursor: pointer;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-menu-btn:hover {
            background: var(--bg-light);
        }
        .mobile-menu-panel {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: #fff;
            z-index: 2000;
            flex-direction: column;
            padding: 20px;
            overflow-y: auto;
            transform: translateX(-100%);
            transition: transform 0.35s ease;
        }
        .mobile-menu-panel.open {
            transform: translateX(0);
        }
        .mobile-menu-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-menu-close {
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
            border-radius: 50%;
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
        }
        .mobile-menu-close:hover {
            background: var(--bg-light);
        }
        .mobile-nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius);
            transition: all var(--transition);
            border-left: 3px solid transparent;
        }
        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            background: var(--bg-light);
            border-left-color: var(--accent);
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== 板块间距 ===== */
        .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;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            background: var(--primary);
            color: #fff;
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero-bg-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.28;
            pointer-events: none;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 31, 59, 0.55) 0%, rgba(10, 31, 59, 0.88) 100%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            padding: 20px 0;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(200, 150, 62, 0.2);
            border: 1px solid rgba(200, 150, 62, 0.5);
            color: var(--accent-light);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 18px;
        }
        .hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .hero-title .highlight {
            color: var(--accent-light);
            position: relative;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.75;
            margin-bottom: 28px;
            max-width: 580px;
        }
        .hero-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            padding: 13px 28px;
            border-radius: 28px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 6px 20px rgba(200, 150, 62, 0.4);
        }
        .btn-hero-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(200, 150, 62, 0.5);
        }
        .btn-hero-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            padding: 13px 28px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.5);
            transition: all var(--transition);
        }
        .btn-hero-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        @media (max-width: 768px) {
            .hero-section {
                min-height: 420px;
            }
            .hero-title {
                font-size: 1.9rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
        }

        /* ===== 数据统计卡片 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -1px;
            line-height: 1;
            margin-bottom: 8px;
        }
        .stat-number .plus {
            color: var(--accent);
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-soft);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .stat-number {
                font-size: 2rem;
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card {
                padding: 20px 14px;
            }
        }

        /* ===== 核心优势卡片 ===== */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .adv-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .adv-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent);
            border-radius: 0 0 var(--radius-sm) var(--radius-sm);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .adv-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .adv-card:hover::before {
            opacity: 1;
        }
        .adv-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            color: var(--accent);
            transition: all var(--transition);
        }
        .adv-card:hover .adv-icon {
            background: var(--accent);
            color: #fff;
            transform: scale(1.08);
        }
        .adv-title {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .adv-desc {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .advantages-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* ===== 品牌故事 ===== */
        .brand-story-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            background: var(--bg-light);
            border-radius: var(--radius-xl);
            overflow: hidden;
            padding: 0;
        }
        .brand-story-img-wrap {
            position: relative;
            height: 100%;
            min-height: 380px;
            overflow: hidden;
            border-radius: var(--radius-xl) 0 0 var(--radius-xl);
        }
        .brand-story-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        .brand-story-text {
            padding: 40px 36px 40px 8px;
        }
        .brand-story-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .brand-story-text p {
            font-size: 0.95rem;
            color: var(--text-soft);
            line-height: 1.8;
            margin-bottom: 12px;
        }
        @media (max-width: 768px) {
            .brand-story-block {
                grid-template-columns: 1fr;
                gap: 0;
            }
            .brand-story-img-wrap {
                min-height: 240px;
                border-radius: var(--radius-xl) var(--radius-xl) 0 0;
            }
            .brand-story-text {
                padding: 28px 20px;
            }
        }

        /* ===== 分类卡片 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .cat-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: pointer;
            display: block;
            color: inherit;
        }
        .cat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .cat-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .cat-card-body {
            padding: 18px 16px;
        }
        .cat-card-body h4 {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .cat-card-body p {
            font-size: 0.85rem;
            color: var(--text-soft);
            line-height: 1.5;
        }
        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .category-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 评价卡片 ===== */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow);
            border-color: transparent;
        }
        .testimonial-stars {
            color: #f0b90b;
            font-size: 0.9rem;
            margin-bottom: 10px;
            letter-spacing: 2px;
        }
        .testimonial-text {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.7;
            margin-bottom: 14px;
            font-style: italic;
        }
        .testimonial-author {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--primary);
        }
        .testimonial-role {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        @media (max-width: 768px) {
            .testimonials-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            background: none;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            transition: background var(--transition);
            border: none;
        }
        .faq-question:hover {
            background: var(--bg-light);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: all var(--transition);
            color: var(--text-soft);
        }
        .faq-item.open .faq-icon {
            background: var(--accent);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.75;
        }

        /* ===== 新闻列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .news-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .news-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .news-card-body {
            padding: 16px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-date {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 6px;
        }
        .news-card-body h4 {
            font-weight: 700;
            font-size: 1rem;
            color: var(--primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .news-card-body p {
            font-size: 0.85rem;
            color: var(--text-soft);
            line-height: 1.5;
            flex: 1;
            margin-bottom: 12px;
        }
        .btn-read-more {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--accent);
            font-weight: 600;
            font-size: 0.85rem;
            transition: all var(--transition);
            align-self: flex-start;
        }
        .btn-read-more:hover {
            color: var(--accent-dark);
            gap: 8px;
        }
        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== CTA 板块 ===== */
        .cta-section {
            background: var(--primary);
            color: #fff;
            text-align: center;
            border-radius: var(--radius-xl);
            padding: 56px 32px;
            position: relative;
            overflow: hidden;
        }
        .cta-section .cta-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.15;
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-section h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            padding: 15px 36px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition);
            box-shadow: 0 8px 24px rgba(200, 150, 62, 0.45);
        }
        .btn-cta-large:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 14px 32px rgba(200, 150, 62, 0.55);
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 40px 20px;
                border-radius: var(--radius-lg);
            }
            .cta-section h3 {
                font-size: 1.4rem;
            }
        }

        /* ===== 合作伙伴 ===== */
        .partners-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 32px 40px;
        }
        .partner-item {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-soft);
            opacity: 0.7;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.5px;
        }
        .partner-item:hover {
            opacity: 1;
            color: var(--primary);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: var(--text-on-dark);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand-desc {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            margin-top: 10px;
        }
        .footer-col h4 {
            font-weight: 700;
            font-size: 0.95rem;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
        }

        /* ===== 标题通用 ===== */
        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--primary);
            text-align: center;
            margin-bottom: 10px;
            letter-spacing: -0.4px;
        }
        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-soft);
            text-align: center;
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.85rem;
                margin-bottom: 28px;
            }
        }

        /* ===== 响应式导航 ===== */
        @media (max-width: 900px) {
            .nav-sub-row {
                display: none;
            }
            .header-search {
                display: none;
            }
            .btn-header {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .mobile-menu-panel {
                display: flex;
            }
            .header-top {
                height: 56px;
            }
            .logo-text {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
        }
        @media (min-width: 901px) {
            .mobile-menu-btn {
                display: none;
            }
            .mobile-menu-panel {
                display: none;
            }
        }

        /* 辅助 */
        .text-accent {
            color: var(--accent);
        }
        .bg-light-custom {
            background: var(--bg-light);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

/* roulang page: category2 */
:root {
            --color-primary: #1e3a5f;    /* 深蓝主色 */
            --color-accent: #c9a84c;     /* 金色强调 */
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-soft: #64748b;
            --color-border: #e2e8f0;
            --radius-md: 0.5rem;
            --radius-lg: 0.75rem;
            --shadow-card: 0 4px 12px rgba(0,0,0,0.05);
            --shadow-hover: 0 12px 28px rgba(0,0,0,0.1);
        }
        
        body {
            font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        *, *::before, *::after {
            box-sizing: inherit;
        }
        
        .container-custom {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        
        /* Header / Navigation Styles */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 40;
            background: white;
            box-shadow: 0 1px 6px rgba(0,0,0,0.08);
        }
        
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.85rem 0;
            border-bottom: 1px solid var(--color-border);
        }
        
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            text-decoration: none;
        }
        
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--color-primary), #2d5a8a);
            color: white;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }
        
        .logo-text {
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--color-primary);
            letter-spacing: -0.3px;
        }
        
        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        
        .btn-search {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            padding: 0.45rem 0.9rem;
            border-radius: 2rem;
            font-size: 0.9rem;
            color: var(--color-text-soft);
            display: flex;
            align-items: center;
            gap: 0.4rem;
            cursor: pointer;
            transition: all 0.2s;
        }
        .btn-search:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        
        .btn-primary-sm {
            background: var(--color-primary);
            color: white;
            border: none;
            padding: 0.45rem 1.2rem;
            border-radius: 2rem;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            white-space: nowrap;
        }
        .btn-primary-sm:hover {
            background: #16304f;
        }
        
        .nav-sub-row {
            background: white;
            border-bottom: 1px solid var(--color-border);
        }
        
        .nav-sub-inner {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            padding: 0.7rem 0;
            overflow-x: auto;
            white-space: nowrap;
            -webkit-overflow-scrolling: touch;
        }
        
        .nav-link {
            text-decoration: none;
            color: var(--color-text-soft);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.3rem 0.1rem;
            border-bottom: 2px solid transparent;
            transition: color 0.2s, border-color 0.2s;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        
        .nav-link:hover {
            color: var(--color-primary);
            border-bottom-color: var(--color-accent);
        }
        
        .nav-link.active {
            color: var(--color-primary);
            font-weight: 700;
            border-bottom-color: var(--color-accent);
        }
        
        .nav-hot-tag {
            background: #f97316;
            color: white;
            font-size: 0.65rem;
            padding: 0.1rem 0.4rem;
            border-radius: 3px;
            font-weight: 700;
            margin-left: 2px;
        }
        
        /* Hamburger for mobile */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--color-primary);
            cursor: pointer;
        }
        
        /* Hero */
        .hero-category {
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 4rem 0;
            color: white;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: linear-gradient(to right, rgba(30,58,95,0.85), rgba(15,35,55,0.7));
            z-index: 1;
        }
        .hero-category-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }
        
        /* Cards */
        .card-article {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: transform 0.2s, box-shadow 0.25s;
            display: flex;
            flex-direction: column;
        }
        .card-article:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        
        .card-img {
            height: 180px;
            object-fit: cover;
            width: 100%;
        }
        
        .tag-pill {
            display: inline-block;
            background: #eff6ff;
            color: #2563eb;
            font-size: 0.7rem;
            padding: 0.25rem 0.7rem;
            border-radius: 1rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        
        /* FAQ accordion */
        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: 1rem 0;
        }
        .faq-question {
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            color: var(--color-text-soft);
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
            margin-top: 0.5rem;
        }
        
        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-col h4 {
            color: white;
            font-weight: 600;
            margin-bottom: 0.8rem;
        }
        .footer-col a {
            display: block;
            color: #94a3b8;
            text-decoration: none;
            margin-bottom: 0.45rem;
            font-size: 0.9rem;
        }
        .footer-col a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.8rem;
            color: #64748b;
        }
        
        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .header-actions .btn-primary-sm,
            .header-actions .btn-search {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
            .nav-sub-inner {
                gap: 1rem;
                font-size: 0.85rem;
            }
            .hero-category {
                padding: 2.5rem 0;
            }
        }

/* roulang page: category1 */
:root {
            --brand-dark: #1a3c5e;
            --brand-deeper: #0e1f3a;
            --gold-primary: #b8942e;
            --gold-light: #c9a84c;
            --accent-warm: #d4a843;
            --bg-page: #f7f8fa;
            --bg-white: #ffffff;
            --text-primary: #1a1f2e;
            --text-secondary: #4a5568;
            --text-muted: #7a8498;
            --border-light: #e2e6ef;
            --border-card: #e8ecf3;
            --shadow-sm: 0 1px 3px rgba(14, 31, 58, 0.06);
            --shadow-md: 0 4px 16px rgba(14, 31, 58, 0.08);
            --shadow-lg: 0 8px 32px rgba(14, 31, 58, 0.12);
            --shadow-xl: 0 16px 48px rgba(14, 31, 58, 0.16);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 18px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
        }

        *,
        *::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', system-ui, sans-serif;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            font-size: 16px;
            min-height: 100vh;
        }

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

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

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

        input {
            font-family: inherit;
            outline: none;
        }

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
            width: 100%;
        }

        /* Header */
        .site-header {
            background: #fff;
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-top-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            flex-wrap: wrap;
            gap: 12px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand-deeper) 100%);
            color: var(--gold-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .logo-text {
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--brand-dark);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .header-quick-links {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .header-quick-links a {
            font-size: 0.875rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .header-quick-links a:hover {
            color: var(--brand-dark);
        }

        .header-search-wrap {
            display: flex;
            align-items: center;
            background: #f5f6f9;
            border-radius: 24px;
            padding: 6px 14px;
            gap: 8px;
            border: 1px solid transparent;
            transition: all var(--transition-fast);
        }

        .header-search-wrap:focus-within {
            border-color: var(--gold-light);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(185, 148, 46, 0.08);
        }

        .header-search-wrap input {
            border: none;
            background: transparent;
            font-size: 0.85rem;
            color: var(--text-primary);
            width: 160px;
            padding: 4px 0;
            outline: none;
        }

        .header-search-wrap input::placeholder {
            color: var(--text-muted);
        }

        .header-search-wrap button {
            background: none;
            border: none;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 2px 4px;
            transition: color var(--transition-fast);
        }

        .header-search-wrap button:hover {
            color: var(--brand-dark);
        }

        .nav-sub-row {
            background: var(--brand-dark);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .nav-sub-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            padding: 8px 0;
            scrollbar-width: none;
        }

        .nav-sub-inner::-webkit-scrollbar {
            display: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 9px 18px;
            border-radius: 22px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.82);
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.01em;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.14);
            font-weight: 600;
        }

        .nav-hot-tag {
            font-size: 0.65rem;
            background: #e53e3e;
            color: #fff;
            padding: 2px 6px;
            border-radius: 10px;
            font-weight: 700;
            line-height: 1;
            letter-spacing: 0.03em;
            animation: pulse-tag 2s infinite;
            position: relative;
            top: -1px;
        }

        @keyframes pulse-tag {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--brand-dark);
            padding: 4px 8px;
            cursor: pointer;
        }

        /* Hero */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, #0e1f3a 0%, #1a3c5e 40%, #163254 100%);
            padding: 56px 0 64px;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-page) 0%, transparent 100%);
            z-index: 1;
        }

        .category-hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .category-hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.1);
            color: var(--gold-light);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 20px;
            letter-spacing: 0.04em;
            margin-bottom: 18px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .category-hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.02em;
            line-height: 1.3;
        }

        .category-hero p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            margin: 0 0 24px;
            line-height: 1.7;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-stats-row {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .hero-stat-item {
            text-align: center;
        }

        .hero-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--gold-light);
            letter-spacing: 0.02em;
        }

        .hero-stat-label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 2px;
        }

        /* Section */
        .section {
            padding: 56px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-header h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--brand-dark);
            margin: 0 0 8px;
            letter-spacing: 0.02em;
        }

        .section-header .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin: 0;
        }

        .section-header .section-line {
            width: 48px;
            height: 3px;
            background: var(--gold-primary);
            border-radius: 3px;
            margin: 12px auto 0;
        }

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

        .article-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--border-card);
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: #d0d7e4;
        }

        .article-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            background: #e8ecf3;
        }

        .article-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--gold-primary);
            background: #fdf8ef;
            padding: 3px 10px;
            border-radius: 12px;
            margin-bottom: 10px;
            letter-spacing: 0.03em;
            align-self: flex-start;
        }

        .article-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
            line-height: 1.5;
            letter-spacing: 0.01em;
        }

        .article-card p {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin: 0 0 14px;
            line-height: 1.6;
            flex: 1;
        }

        .article-card-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
        }

        .article-card-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* Data Stats */
        .stats-bar {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            box-shadow: var(--shadow-md);
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
            border: 1px solid var(--border-card);
        }

        .stats-bar-item .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--brand-dark);
            letter-spacing: 0.02em;
        }

        .stats-bar-item .stat-num span {
            color: var(--gold-primary);
        }

        .stats-bar-item .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Process */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .process-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
            transition: all var(--transition-base);
            position: relative;
        }

        .process-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .process-step-num {
            width: 40px;
            height: 40px;
            background: var(--brand-dark);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            margin: 0 auto 14px;
        }

        .process-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
        }

        .process-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #d0d7e4;
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
            letter-spacing: 0.01em;
        }

        .faq-question i {
            transition: transform var(--transition-fast);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

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

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }

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

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand-deeper) 100%);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.1;
            z-index: 0;
        }

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

        .cta-section h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 0 0 10px;
            letter-spacing: 0.02em;
        }

        .cta-section p {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.8);
            margin: 0 0 24px;
        }

        .btn-gold {
            display: inline-block;
            background: var(--gold-primary);
            color: #fff;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 24px;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 14px rgba(184, 148, 46, 0.35);
        }

        .btn-gold:hover {
            background: #a88928;
            box-shadow: 0 6px 20px rgba(184, 148, 46, 0.5);
            transform: translateY(-1px);
            color: #fff;
        }

        .btn-outline-light {
            display: inline-block;
            background: transparent;
            color: #fff;
            font-weight: 500;
            padding: 10px 24px;
            border-radius: 24px;
            font-size: 0.9rem;
            border: 2px solid rgba(255, 255, 255, 0.4);
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
        }

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

        /* Footer */
        .site-footer {
            background: #0e1f3a;
            color: rgba(255, 255, 255, 0.8);
            padding: 48px 0 24px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand-desc {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            margin: 8px 0 0;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.03em;
        }

        .footer-col a {
            display: block;
            font-size: 0.84rem;
            color: rgba(255, 255, 255, 0.6);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 18px;
            text-align: center;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.45);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .header-search-wrap input {
                width: 120px;
            }
        }

        @media (max-width: 768px) {
            .articles-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .process-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
                padding: 24px 16px;
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero p {
                font-size: 0.9rem;
            }
            .hero-stats-row {
                gap: 20px;
            }
            .hero-stat-num {
                font-size: 1.5rem;
            }
            .section {
                padding: 36px 0;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .header-top-row {
                gap: 8px;
            }
            .header-search-wrap input {
                width: 100px;
            }
            .header-quick-links {
                gap: 8px;
                font-size: 0.8rem;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .nav-sub-inner {
                gap: 2px;
                padding: 6px 0;
            }
            .nav-link {
                padding: 7px 12px;
                font-size: 0.8rem;
                border-radius: 18px;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .cta-section h3 {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding-left: 14px;
                padding-right: 14px;
            }
            .category-hero {
                padding: 36px 0 44px;
            }
            .category-hero h1 {
                font-size: 1.35rem;
            }
            .hero-stats-row {
                gap: 14px;
            }
            .hero-stat-num {
                font-size: 1.3rem;
            }
            .hero-stat-label {
                font-size: 0.7rem;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .stats-bar {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
                padding: 18px 12px;
            }
            .stats-bar-item .stat-num {
                font-size: 1.5rem;
            }
            .nav-link {
                padding: 6px 10px;
                font-size: 0.75rem;
                border-radius: 16px;
            }
            .logo-text {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 13px;
            }
            .header-search-wrap input {
                width: 80px;
                font-size: 0.78rem;
            }
            .article-card-img {
                height: 160px;
            }
            .article-card-body {
                padding: 14px 16px 16px;
            }
            .article-card h3 {
                font-size: 0.95rem;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.88rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.82rem;
            }
        }

/* roulang page: category3 */
:root {
            --color-brand-700: #1a3d5c;
            --color-brand-800: #122d45;
            --color-brand-900: #0b1f32;
            --color-gold-500: #d4a843;
            --color-gold-400: #e8c560;
            --color-surface: #f8f9fb;
            --color-card: #ffffff;
            --color-muted: #6b7280;
            --color-border: #e5e7eb;
            --color-text: #1f2937;
            --color-text-weak: #4b5563;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.09);
            --shadow-xl: 0 14px 44px rgba(0, 0, 0, 0.11);
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
        }

        *,
        *::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", sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: #ffffff;
            min-height: 100vh;
        }

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

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

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

        input {
            font-family: inherit;
            outline: none;
        }

        .container-custom {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header */
        .site-header {
            background: #ffffff;
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }
        .header-top-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            flex-wrap: wrap;
            gap: 12px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 9px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--color-brand-700);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }
        .logo-text {
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-brand-900);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .btn-header-outline {
            padding: 7px 16px;
            border-radius: 20px;
            border: 1.5px solid var(--color-brand-700);
            color: var(--color-brand-700);
            font-size: 0.875rem;
            font-weight: 500;
            background: transparent;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-header-outline:hover {
            background: var(--color-brand-700);
            color: #fff;
        }
        .btn-header-solid {
            padding: 7px 16px;
            border-radius: 20px;
            background: var(--color-gold-500);
            color: #1a1a1a;
            font-size: 0.875rem;
            font-weight: 600;
            border: 1.5px solid var(--color-gold-500);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-header-solid:hover {
            background: #c99a30;
            border-color: #c99a30;
            color: #111;
        }

        /* Nav Sub Row */
        .nav-sub-row {
            background: var(--color-brand-900);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .nav-sub-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            padding: 8px 0;
        }
        .nav-sub-inner::-webkit-scrollbar {
            display: none;
        }
        .nav-sub-inner .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 7px 15px;
            border-radius: 20px;
            color: rgba(255, 255, 255, 0.82);
            font-size: 0.9rem;
            font-weight: 500;
            white-space: nowrap;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }
        .nav-sub-inner .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-sub-inner .nav-link.active {
            background: var(--color-gold-500);
            color: #1a1a1a;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(212, 168, 67, 0.35);
        }
        .nav-hot-tag {
            font-size: 0.65rem;
            background: #e53e3e;
            color: #fff;
            padding: 1px 6px;
            border-radius: 10px;
            font-weight: 700;
            line-height: 1.4;
            letter-spacing: 0.03em;
        }
        .nav-sub-inner .nav-link.active .nav-hot-tag {
            background: #c0392b;
        }

        /* Mobile menu toggle */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-brand-900);
            padding: 6px;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .mobile-menu-toggle {
                display: block;
            }
            .nav-sub-inner {
                flex-wrap: nowrap;
                gap: 2px;
                padding: 6px 0;
            }
            .nav-sub-inner .nav-link {
                padding: 6px 11px;
                font-size: 0.8rem;
                border-radius: 16px;
            }
            .header-actions {
                gap: 8px;
            }
            .btn-header-outline,
            .btn-header-solid {
                padding: 6px 12px;
                font-size: 0.78rem;
            }
            .logo-text {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }
        }

        /* Breadcrumb */
        .breadcrumb-row {
            padding: 14px 0;
            font-size: 0.85rem;
            color: var(--color-muted);
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .breadcrumb-row a {
            color: var(--color-brand-700);
            font-weight: 500;
        }
        .breadcrumb-row a:hover {
            color: var(--color-gold-500);
        }
        .breadcrumb-sep {
            color: #c0c7cf;
        }

        /* Category Banner */
        .cat-banner {
            position: relative;
            background: var(--color-brand-900);
            min-height: 280px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .cat-banner-bg {
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 0;
        }
        .cat-banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 31, 50, 0.88) 0%, rgba(18, 45, 69, 0.7) 60%, rgba(26, 61, 92, 0.5) 100%);
            z-index: 1;
        }
        .cat-banner-content {
            position: relative;
            z-index: 2;
            padding: 40px 0;
        }
        .cat-badge {
            display: inline-block;
            background: var(--color-gold-500);
            color: #1a1a1a;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
        }
        .cat-banner-title {
            font-size: 2.4rem;
            font-weight: 800;
            color: #ffffff;
            margin: 0 0 10px;
            letter-spacing: 0.02em;
        }
        .cat-banner-desc {
            font-size: 1.08rem;
            color: rgba(255, 255, 255, 0.78);
            max-width: 620px;
            line-height: 1.75;
            margin: 0;
        }
        @media (max-width: 768px) {
            .cat-banner {
                min-height: 220px;
            }
            .cat-banner-title {
                font-size: 1.7rem;
            }
            .cat-banner-desc {
                font-size: 0.95rem;
            }
            .cat-banner-content {
                padding: 28px 0;
            }
        }

        /* Section */
        .section {
            padding: 56px 0;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--color-brand-900);
            margin: 0 0 8px;
            letter-spacing: 0.01em;
        }
        .section-subtitle {
            font-size: 0.95rem;
            color: var(--color-muted);
            margin: 0 0 32px;
            max-width: 600px;
            line-height: 1.6;
        }
        .section-header {
            margin-bottom: 28px;
        }
        @media (max-width: 768px) {
            .section {
                padding: 36px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
        }

        /* Cards */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 22px;
        }
        .card-skill {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 24px 22px;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .card-skill:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: #d0d5dd;
        }
        .card-skill-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: #eef3f9;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--color-brand-700);
            flex-shrink: 0;
        }
        .card-skill-title {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-brand-900);
            margin: 0;
        }
        .card-skill-desc {
            font-size: 0.88rem;
            color: var(--color-text-weak);
            line-height: 1.6;
            margin: 0;
        }
        .card-skill-link {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--color-gold-500);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: auto;
            transition: color var(--transition-fast);
        }
        .card-skill-link:hover {
            color: #b89030;
        }

        /* Article list */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .article-item {
            display: flex;
            gap: 18px;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 18px;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            align-items: flex-start;
        }
        .article-item:hover {
            box-shadow: var(--shadow-md);
            border-color: #d0d5dd;
        }
        .article-item-img {
            width: 140px;
            height: 100px;
            border-radius: var(--radius-md);
            object-fit: cover;
            flex-shrink: 0;
        }
        .article-item-body {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .article-item-tag {
            display: inline-block;
            font-size: 0.72rem;
            background: #eef3f9;
            color: var(--color-brand-700);
            padding: 3px 10px;
            border-radius: 12px;
            font-weight: 600;
            align-self: flex-start;
        }
        .article-item-title {
            font-weight: 700;
            font-size: 1rem;
            color: var(--color-brand-900);
            margin: 0;
            line-height: 1.4;
        }
        .article-item-excerpt {
            font-size: 0.85rem;
            color: var(--color-text-weak);
            line-height: 1.55;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-item-date {
            font-size: 0.78rem;
            color: var(--color-muted);
        }
        @media (max-width: 640px) {
            .article-item {
                flex-direction: column;
                gap: 10px;
            }
            .article-item-img {
                width: 100%;
                height: 160px;
            }
        }

        /* Strategy block */
        .strategy-block {
            background: var(--color-brand-900);
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            color: #fff;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .strategy-block-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-xl);
        }
        .strategy-block-img img {
            width: 100%;
            height: auto;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }
        .strategy-block-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 0 12px;
            color: #fff;
        }
        .strategy-block-text {
            font-size: 0.93rem;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.75;
            margin: 0 0 18px;
        }
        .strategy-block-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .strategy-block-list li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.85);
        }
        .strategy-block-list li i {
            color: var(--color-gold-400);
            margin-top: 3px;
            flex-shrink: 0;
        }
        @media (max-width: 768px) {
            .strategy-block {
                grid-template-columns: 1fr;
                padding: 28px 20px;
                gap: 20px;
            }
            .strategy-block-title {
                font-size: 1.25rem;
            }
        }

        /* Stats row */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .stat-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 22px 18px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-brand-700);
            margin: 0 0 4px;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--color-muted);
            margin: 0;
        }
        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-number {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 800px;
        }
        .faq-item {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 20px 22px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
            border-color: #d0d5dd;
        }
        .faq-q {
            font-weight: 700;
            font-size: 1rem;
            color: var(--color-brand-900);
            margin: 0 0 8px;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .faq-q i {
            color: var(--color-gold-500);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .faq-a {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.7;
            margin: 0;
            padding-left: 24px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #1a3d5c 0%, #122d45 50%, #0b1f32 100%);
            border-radius: var(--radius-xl);
            padding: 48px 36px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }
        .cta-section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 0 0 10px;
        }
        .cta-section-desc {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.75);
            margin: 0 0 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta-gold {
            display: inline-block;
            padding: 12px 30px;
            background: var(--color-gold-500);
            color: #1a1a1a;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 28px;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(212, 168, 67, 0.35);
            cursor: pointer;
        }
        .btn-cta-gold:hover {
            background: #e0b850;
            box-shadow: 0 6px 22px rgba(212, 168, 67, 0.5);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 32px 20px;
            }
            .cta-section-title {
                font-size: 1.3rem;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--color-brand-900);
            color: rgba(255, 255, 255, 0.8);
            padding: 44px 0 24px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 28px;
        }
        .footer-brand-desc {
            font-size: 0.85rem;
            line-height: 1.65;
            color: rgba(255, 255, 255, 0.6);
            margin: 8px 0 0;
            max-width: 300px;
        }
        .footer-col h4 {
            font-weight: 700;
            font-size: 0.95rem;
            color: #fff;
            margin: 0 0 12px;
        }
        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            padding: 4px 0;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--color-gold-400);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 18px;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .footer-brand-desc {
                max-width: 100%;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
        }

        /* Utility */
        .text-gold {
            color: var(--color-gold-500);
        }
        .bg-surface {
            background: var(--color-surface);
        }
        .divider {
            border: none;
            border-top: 1px solid var(--color-border);
            margin: 0;
        }

        /* Focus accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--color-gold-500);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .nav-sub-inner .nav-link:focus-visible {
            outline-color: #fff;
            outline-offset: 1px;
        }

/* roulang page: category4 */
:root {
            --brand-500: #1a3c5e;
            --brand-600: #163250;
            --brand-700: #112842;
            --brand-800: #0d1f34;
            --brand-900: #091626;
            --accent-500: #c5952e;
            --accent-600: #b8861f;
            --accent-400: #d4a843;
            --bg-body: #f8f9fb;
            --bg-card: #ffffff;
            --text-main: #1a1f2e;
            --text-soft: #5a6275;
            --text-muted: #8b919e;
            --border-light: #e5e8ef;
            --border-card: #eef0f4;
            --shadow-sm: 0 1px 3px rgba(9, 22, 38, 0.06);
            --shadow-md: 0 4px 16px rgba(9, 22, 38, 0.08);
            --shadow-lg: 0 8px 32px rgba(9, 22, 38, 0.12);
            --shadow-xl: 0 16px 48px rgba(9, 22, 38, 0.16);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 24px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.22s ease, background 0.22s ease;
        }

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

        input {
            font-family: inherit;
            outline: none;
        }

        /* ===== 容器 ===== */
        .container-custom {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== HEADER ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #ffffff;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-top-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            padding-bottom: 10px;
            gap: 20px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
            border-radius: 10px;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 2px 8px rgba(26, 60, 94, 0.25);
        }
        .logo-text {
            font-weight: 700;
            font-size: 1.25rem;
            letter-spacing: 0.02em;
            color: var(--brand-700);
            white-space: nowrap;
        }
        .header-search-wrap {
            display: flex;
            align-items: center;
            background: #f4f6f9;
            border-radius: 24px;
            padding: 6px 14px;
            gap: 8px;
            border: 1px solid transparent;
            transition: all 0.25s ease;
            max-width: 280px;
            width: 100%;
        }
        .header-search-wrap:focus-within {
            border-color: var(--brand-500);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(26, 60, 94, 0.06);
        }
        .header-search-wrap input {
            border: none;
            background: transparent;
            font-size: 0.9rem;
            color: var(--text-main);
            width: 100%;
            min-width: 0;
        }
        .header-search-wrap input::placeholder {
            color: var(--text-muted);
        }
        .header-search-wrap .search-icon {
            color: var(--text-muted);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        /* ===== NAV SUB ROW ===== */
        .nav-sub-row {
            background: #ffffff;
            border-top: 1px solid var(--border-light);
            padding: 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-sub-row::-webkit-scrollbar {
            display: none;
        }
        .nav-sub-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 6px 0;
            white-space: nowrap;
            flex-wrap: nowrap;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 9px 18px;
            border-radius: 22px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text-soft);
            transition: all 0.22s ease;
            position: relative;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-link:hover {
            color: var(--brand-600);
            background: #f4f7fb;
        }
        .nav-link.active {
            color: #fff;
            background: var(--brand-500);
            font-weight: 600;
            box-shadow: 0 2px 10px rgba(26, 60, 94, 0.3);
        }
        .nav-link.active:hover {
            background: var(--brand-600);
            color: #fff;
        }
        .nav-hot-tag {
            font-size: 0.68rem;
            font-weight: 700;
            padding: 2px 7px;
            border-radius: 10px;
            background: #e53e3e;
            color: #fff;
            letter-spacing: 0.03em;
            line-height: 1.3;
        }
        .nav-link.active .nav-hot-tag {
            background: #fff;
            color: #e53e3e;
        }

        /* 移动端汉堡菜单 */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--brand-600);
            padding: 6px 10px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .mobile-menu-toggle:hover {
            background: #f4f7fb;
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 56px 0;
        }
        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-600);
            background: #fdf8e8;
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 10px;
        }
        .section-title {
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--brand-800);
            letter-spacing: 0.01em;
            margin-bottom: 6px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-soft);
            margin-bottom: 8px;
            line-height: 1.6;
        }

        /* ===== 卡片 ===== */
        .card-recommend {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .card-recommend:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: #dde3ec;
        }
        .card-recommend .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #eef2f7;
        }
        .card-recommend .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .card-recommend:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .card-badge-hot {
            position: absolute;
            top: 14px;
            right: 14px;
            background: #e53e3e;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 5px 11px;
            border-radius: 14px;
            letter-spacing: 0.04em;
            box-shadow: 0 2px 8px rgba(229, 62, 62, 0.35);
        }
        .card-badge-expert {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent-500);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 5px 11px;
            border-radius: 14px;
            letter-spacing: 0.04em;
            box-shadow: 0 2px 8px rgba(197, 149, 46, 0.35);
        }
        .card-recommend .card-body {
            padding: 18px 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .card-recommend .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--brand-800);
            line-height: 1.4;
        }
        .card-recommend .card-meta {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .card-recommend .card-desc {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.5;
            flex: 1;
        }
        .card-recommend .card-footer-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 6px;
            border-top: 1px solid var(--border-light);
            margin-top: auto;
        }
        .btn-sm-outline {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 7px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            border: 1.5px solid var(--brand-500);
            color: var(--brand-600);
            background: transparent;
            transition: all 0.22s ease;
            cursor: pointer;
        }
        .btn-sm-outline:hover {
            background: var(--brand-500);
            color: #fff;
            box-shadow: 0 3px 12px rgba(26, 60, 94, 0.25);
        }

        /* ===== 专家卡片 ===== */
        .card-expert {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .card-expert:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .card-expert .expert-avatar {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-400, #5c82a8), var(--brand-600));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .card-expert .expert-info {
            flex: 1;
            min-width: 0;
        }
        .card-expert .expert-name {
            font-weight: 700;
            color: var(--brand-800);
            font-size: 1rem;
        }
        .card-expert .expert-rate {
            font-size: 0.82rem;
            color: var(--accent-600);
            font-weight: 600;
        }
        .card-expert .expert-pick {
            font-size: 0.9rem;
            color: var(--text-soft);
            margin-top: 4px;
            line-height: 1.5;
        }

        /* ===== 统计卡片 ===== */
        .stat-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 22px 20px;
            text-align: center;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-card .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--brand-600);
            letter-spacing: 0.02em;
        }
        .stat-card .stat-label {
            font-size: 0.88rem;
            color: var(--text-soft);
            margin-top: 2px;
        }

        /* ===== CTA区块 ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--brand-700), var(--brand-900));
            border-radius: var(--radius-xl);
            padding: 44px 36px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 180px;
            height: 180px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-block::after {
            content: '';
            position: absolute;
            bottom: -30px;
            left: -30px;
            width: 120px;
            height: 120px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-block .cta-title {
            font-size: 1.6rem;
            font-weight: 700;
            position: relative;
            z-index: 1;
        }
        .cta-block .cta-sub {
            font-size: 0.95rem;
            opacity: 0.85;
            margin-top: 8px;
            position: relative;
            z-index: 1;
        }
        .btn-cta-white {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 28px;
            border-radius: 28px;
            font-weight: 700;
            font-size: 0.95rem;
            background: #fff;
            color: var(--brand-700);
            transition: all 0.25s ease;
            position: relative;
            z-index: 1;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }
        .btn-cta-white:hover {
            background: #f0f4f8;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
            transform: translateY(-2px);
        }

        /* ===== 排行列表 ===== */
        .rank-list-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            transition: all 0.25s ease;
            box-shadow: var(--shadow-sm);
        }
        .rank-list-item:hover {
            box-shadow: var(--shadow-md);
            border-color: #dde3ec;
        }
        .rank-num {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .rank-num.top1 {
            background: #fef3c7;
            color: #b8861f;
        }
        .rank-num.top2 {
            background: #eef2f7;
            color: #5a6275;
        }
        .rank-num.top3 {
            background: #fdf2e8;
            color: #c05621;
        }
        .rank-num.normal {
            background: #f8f9fb;
            color: #8b919e;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            padding: 18px 22px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--brand-700);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            user-select: none;
            background: #fff;
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: #fafbfc;
        }
        .faq-answer {
            padding: 0 22px 20px;
            font-size: 0.92rem;
            color: var(--text-soft);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-question {
            color: var(--brand-500);
        }
        .faq-arrow {
            transition: transform 0.3s ease;
            font-size: 0.8rem;
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: var(--brand-500);
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--brand-900);
            color: #c8d4e2;
            padding: 48px 0 24px;
            margin-top: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand-desc {
            font-size: 0.88rem;
            line-height: 1.7;
            color: #b0bfd0;
            margin-top: 8px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: #b0bfd0;
            padding: 5px 0;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            font-size: 0.8rem;
            color: #8b94a3;
            line-height: 1.6;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .section-block {
                padding: 40px 0;
            }
            .section-title {
                font-size: 1.55rem;
            }
            .cta-block {
                padding: 34px 24px;
            }
            .cta-block .cta-title {
                font-size: 1.35rem;
            }
        }
        @media (max-width: 768px) {
            .header-top-row {
                padding-top: 10px;
                padding-bottom: 8px;
                gap: 12px;
            }
            .header-search-wrap {
                max-width: 200px;
            }
            .logo-text {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
                border-radius: 8px;
            }
            .nav-link {
                padding: 7px 13px;
                font-size: 0.82rem;
                border-radius: 18px;
            }
            .section-block {
                padding: 32px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .card-recommend .card-body {
                padding: 14px 15px 18px;
            }
            .card-recommend .card-title {
                font-size: 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-expert {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .stat-card .stat-number {
                font-size: 1.7rem;
            }
            .cta-block {
                padding: 28px 18px;
                border-radius: var(--radius-lg);
            }
            .cta-block .cta-title {
                font-size: 1.2rem;
            }
            .rank-list-item {
                gap: 10px;
                padding: 11px 13px;
            }
            .rank-num {
                width: 28px;
                height: 28px;
                font-size: 0.78rem;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding-left: 14px;
                padding-right: 14px;
            }
            .header-search-wrap {
                max-width: 140px;
                padding: 5px 10px;
            }
            .header-search-wrap input {
                font-size: 0.78rem;
            }
            .logo-text {
                font-size: 0.98rem;
            }
            .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 12px;
                border-radius: 7px;
            }
            .nav-link {
                padding: 6px 10px;
                font-size: 0.76rem;
                border-radius: 16px;
            }
            .nav-hot-tag {
                font-size: 0.6rem;
                padding: 1px 5px;
                border-radius: 8px;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .section-subtitle {
                font-size: 0.85rem;
            }
            .section-block {
                padding: 24px 0;
            }
            .card-recommend .card-img-wrap {
                aspect-ratio: 16 / 11;
            }
            .card-badge-hot,
            .card-badge-expert {
                font-size: 0.68rem;
                padding: 3px 8px;
                top: 8px;
            }
            .card-recommend .card-title {
                font-size: 0.95rem;
            }
            .card-recommend .card-desc {
                font-size: 0.8rem;
            }
            .btn-sm-outline {
                font-size: 0.78rem;
                padding: 5px 12px;
            }
            .cta-block {
                padding: 22px 14px;
                border-radius: var(--radius-md);
            }
            .cta-block .cta-title {
                font-size: 1.05rem;
            }
            .cta-block .cta-sub {
                font-size: 0.82rem;
            }
            .btn-cta-white {
                font-size: 0.85rem;
                padding: 10px 20px;
                border-radius: 22px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 16px 16px;
                font-size: 0.82rem;
            }
            .stat-card {
                padding: 16px 12px;
            }
            .stat-card .stat-number {
                font-size: 1.4rem;
            }
            .stat-card .stat-label {
                font-size: 0.76rem;
            }
        }