/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1B3A4B;
            --primary-light: #2A5A6A;
            --primary-dark: #0F2530;
            --accent: #E8613A;
            --accent-hover: #D4522E;
            --accent-glow: rgba(232, 97, 58, 0.3);
            --dark: #0D1B24;
            --dark-panel: #14242F;
            --dark-card: #1A2D3A;
            --bg: #F4F6F8;
            --bg-alt: #E9EDF0;
            --text: #1A2A34;
            --text-light: #5A6E7A;
            --text-inverse: #F0F4F8;
            --border: rgba(27, 58, 75, 0.12);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(13, 27, 36, 0.08);
            --shadow-lg: 0 12px 48px rgba(13, 27, 36, 0.14);
            --shadow-accent: 0 4px 24px rgba(232, 97, 58, 0.25);
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-w: 1200px;
            --header-h: 72px;
            --tab-h: 64px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.65;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-h);
            padding-bottom: var(--tab-h);
        }
        @media (min-width: 769px) {
            body {
                padding-bottom: 0;
            }
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--accent-hover);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        :focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-w);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 排版 ===== */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.25;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 640px;
            line-height: 1.6;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-sub {
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== Header / 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(13, 27, 36, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition);
        }
        .header.scrolled {
            background: rgba(13, 27, 36, 0.98);
            box-shadow: 0 2px 32px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-w);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-inverse);
            letter-spacing: -0.02em;
            transition: opacity var(--transition);
        }
        .logo:hover {
            opacity: 0.85;
            color: var(--text-inverse);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-desktop a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
            font-size: 0.92rem;
            transition: all var(--transition);
            position: relative;
        }
        .nav-desktop a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-desktop a.active {
            color: #fff;
            background: var(--accent);
            box-shadow: var(--shadow-accent);
        }
        .nav-desktop a.active:hover {
            background: var(--accent-hover);
        }
        .nav-cta {
            background: var(--accent) !important;
            color: #fff !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            box-shadow: var(--shadow-accent);
        }
        .nav-cta:hover {
            background: var(--accent-hover) !important;
            transform: translateY(-1px);
            box-shadow: 0 6px 28px rgba(232, 97, 58, 0.35) !important;
        }

        /* ===== 移动端底部Tab ===== */
        .bottom-tab {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            height: var(--tab-h);
            background: rgba(13, 27, 36, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-around;
            padding: 0 8px;
            display: none;
        }
        .bottom-tab a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.7rem;
            font-weight: 500;
            transition: all var(--transition);
            min-width: 64px;
        }
        .bottom-tab a i {
            font-size: 1.25rem;
            transition: transform var(--transition);
        }
        .bottom-tab a:hover {
            color: rgba(255, 255, 255, 0.85);
        }
        .bottom-tab a.active {
            color: var(--accent);
        }
        .bottom-tab a.active i {
            transform: scale(1.1);
        }
        @media (max-width: 768px) {
            .bottom-tab {
                display: flex;
            }
            .nav-desktop {
                display: none;
            }
            .header-inner {
                padding: 0 16px;
            }
        }
        @media (min-width: 769px) {
            .bottom-tab {
                display: none !important;
            }
            .nav-desktop {
                display: flex;
            }
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 86vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.5;
            transform: scale(1.02);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 27, 36, 0.85) 30%, rgba(13, 27, 36, 0.4) 70%, rgba(232, 97, 58, 0.15) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 24px;
            max-width: 900px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(232, 97, 58, 0.18);
            border: 1px solid rgba(232, 97, 58, 0.3);
            padding: 6px 18px;
            border-radius: 50px;
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero-title {
            font-size: clamp(2.6rem, 7vw, 4.8rem);
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.03em;
            color: var(--text-inverse);
            margin-bottom: 20px;
        }
        .hero-title .highlight {
            color: var(--accent);
            text-shadow: 0 0 40px var(--accent-glow);
        }
        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-accent);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(232, 97, 58, 0.4);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.3);
            color: var(--text-inverse);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            background: rgba(232, 97, 58, 0.1);
            color: var(--accent);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            justify-content: center;
            margin-top: 52px;
            padding-top: 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-inverse);
            letter-spacing: -0.02em;
        }
        .hero-stat-num .accent {
            color: var(--accent);
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 70vh;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 20px;
                padding-top: 24px;
                margin-top: 36px;
            }
            .hero-stat-num {
                font-size: 1.5rem;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-dark {
            background: var(--dark-panel);
            color: var(--text-inverse);
        }
        .section-dark .section-title {
            color: var(--text-inverse);
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.6);
        }
        .section-alt {
            background: var(--bg-alt);
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
        }

        /* ===== 品牌介绍 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4 / 3;
            background: var(--dark-card);
        }
        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .intro-image:hover img {
            transform: scale(1.03);
        }
        .intro-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .intro-text p {
            color: var(--text-light);
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--primary);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .tag i {
            font-size: 0.7rem;
        }
        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .intro-text h3 {
                font-size: 1.3rem;
            }
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
            max-width: 480px;
            margin: 0 auto;
        }
        .category-card {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 24px 28px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }
        .category-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.5rem;
            flex-shrink: 0;
            transition: background var(--transition);
        }
        .category-card:hover .category-icon {
            background: var(--accent);
        }
        .category-info h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }
        .category-info p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .category-arrow {
            margin-left: auto;
            color: var(--text-light);
            font-size: 1.2rem;
            transition: all var(--transition);
        }
        .category-card:hover .category-arrow {
            color: var(--accent);
            transform: translateX(4px);
        }

        /* ===== 资讯卡片列表 (CMS) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(232, 97, 58, 0.2);
        }
        .news-card-img {
            aspect-ratio: 16 / 10;
            background: var(--dark-card);
            overflow: hidden;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.05);
        }
        .news-card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .news-card-meta .cat {
            background: var(--bg-alt);
            padding: 2px 10px;
            border-radius: 50px;
            font-weight: 600;
            color: var(--primary);
        }
        .news-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-excerpt {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .news-card-link {
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: auto;
            transition: gap var(--transition);
        }
        .news-card-link:hover {
            gap: 12px;
            color: var(--accent-hover);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            color: var(--text-light);
        }
        .news-empty i {
            font-size: 2.4rem;
            color: var(--border);
            margin-bottom: 16px;
        }
        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
            .news-card-body {
                padding: 16px 18px 20px;
            }
        }

        /* ===== 数据/流程板块 ===== */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .flow-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
        }
        .flow-item:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .flow-num {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent);
            opacity: 0.3;
            line-height: 1;
            margin-bottom: 12px;
            letter-spacing: -0.04em;
        }
        .flow-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-inverse);
            margin-bottom: 8px;
        }
        .flow-item p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.6;
        }
        .flow-item .flow-icon {
            font-size: 1.8rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
        @media (max-width: 1024px) {
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .flow-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 数据统计条 ===== */
        .data-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            background: var(--dark-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .data-item {
            padding: 32px 20px;
            text-align: center;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
        }
        .data-item:last-child {
            border-right: none;
        }
        .data-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -0.02em;
        }
        .data-label {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .data-bar {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-item:nth-child(2) {
                border-right: none;
            }
            .data-item:nth-child(1),
            .data-item:nth-child(3) {
                border-right: 1px solid rgba(255, 255, 255, 0.06);
            }
            .data-num {
                font-size: 1.7rem;
            }
            .data-item {
                padding: 24px 12px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-lg);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary-dark);
            cursor: pointer;
            transition: background var(--transition);
            gap: 16px;
            user-select: none;
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question i {
            color: var(--accent);
            font-size: 0.9rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            transform: scale(1.05);
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 72px 24px;
        }
        .cta-inner h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-inverse);
            margin-bottom: 16px;
        }
        .cta-inner p {
            color: rgba(255, 255, 255, 0.65);
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        @media (max-width: 768px) {
            .cta-inner h2 {
                font-size: 1.6rem;
            }
            .cta-inner {
                padding: 48px 16px;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--dark);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            font-size: 1.4rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h5 {
            color: var(--text-inverse);
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.45);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 辅助 ===== */
        .text-accent {
            color: var(--accent);
        }
        .text-center {
            text-align: center;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-48 {
            margin-top: 48px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent);
        }

        /* ===== 加载动画 ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .anim-fade-up {
            animation: fadeUp 0.7s ease forwards;
        }
        .anim-delay-1 {
            animation-delay: 0.1s;
        }
        .anim-delay-2 {
            animation-delay: 0.25s;
        }
        .anim-delay-3 {
            animation-delay: 0.4s;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #d4451a;
            --accent-light: #e85d30;
            --accent-dark: #b03210;
            --bg: #f6f8fa;
            --bg-alt: #ffffff;
            --bg-dark: #0d1b2a;
            --text: #1e2a3a;
            --text-light: #5a6a7a;
            --text-white: #f0f4f8;
            --border: #dce2ea;
            --radius: 12px;
            --radius-sm: 6px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.14);
            --transition: 0.25s ease;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
            --tab-height: 64px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--primary-dark); font-weight: 700; }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header.scrolled { background: rgba(255,255,255,0.98); box-shadow: var(--shadow); }
        .header-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
        }
        .logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--accent);
            color: #fff;
            border-radius: 10px;
            font-size: 1.2rem;
            box-shadow: 0 4px 12px rgba(212,69,26,0.25);
        }
        .logo:hover { color: var(--primary-dark); }
        .nav-desktop { display: flex; align-items: center; gap: 8px; }
        .nav-desktop a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            transition: transform var(--transition);
        }
        .nav-desktop a:hover { color: var(--primary); background: rgba(26,58,92,0.06); }
        .nav-desktop a:hover::after { transform: translateX(-50%) scaleX(1); }
        .nav-desktop a.active { color: var(--primary-dark); background: rgba(26,58,92,0.08); }
        .nav-desktop a.active::after { transform: translateX(-50%) scaleX(1); }
        .nav-desktop .nav-cta {
            background: var(--accent);
            color: #fff !important;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(212,69,26,0.25);
            transition: all var(--transition);
        }
        .nav-desktop .nav-cta::after { display: none; }
        .nav-desktop .nav-cta:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,69,26,0.35); color: #fff !important; }

        /* ===== Mobile Bottom Tab ===== */
        .mobile-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            height: var(--tab-height);
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--border);
            z-index: 1100;
            padding: 0 12px;
            box-shadow: 0 -4px 20px rgba(0,0,0,0.05);
        }
        .mobile-tab-inner {
            display: flex;
            align-items: center;
            justify-content: space-around;
            height: 100%;
            max-width: 600px;
            margin: 0 auto;
        }
        .mobile-tab a {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
            padding: 6px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--text-light);
            transition: all var(--transition);
            min-width: 60px;
        }
        .mobile-tab a i { font-size: 1.3rem; }
        .mobile-tab a.active { color: var(--accent); }
        .mobile-tab a.active i { transform: scale(1.1); }
        .mobile-tab a:hover { color: var(--primary); }
        .mobile-tab .tab-cta {
            background: var(--accent);
            color: #fff !important;
            padding: 6px 18px;
            border-radius: 20px;
            box-shadow: 0 4px 14px rgba(212,69,26,0.2);
        }
        .mobile-tab .tab-cta i { font-size: 1.1rem; }

        /* ===== Article Hero ===== */
        .article-hero {
            margin-top: var(--nav-height);
            padding: 60px 0 50px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            color: var(--text-white);
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13,27,42,0.88) 0%, rgba(26,58,92,0.70) 100%);
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero-bread {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
        }
        .article-hero-bread a { color: rgba(255,255,255,0.8); }
        .article-hero-bread a:hover { color: #fff; }
        .article-hero-bread .sep { color: rgba(255,255,255,0.4); }
        .article-hero .cat-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            max-width: 860px;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }
        .article-hero .meta {
            display: flex;
            align-items: center;
            gap: 18px;
            font-size: 0.95rem;
            color: rgba(255,255,255,0.75);
        }
        .article-hero .meta i { margin-right: 6px; color: var(--accent-light); }
        .article-hero .meta span { display: flex; align-items: center; }

        /* ===== Article Main ===== */
        .article-main {
            padding: 50px 0 70px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-body {
            background: var(--bg-alt);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            box-shadow: var(--shadow);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-body .content p {
            margin-bottom: 1.4em;
        }
        .article-body .content h2 {
            font-size: 1.6rem;
            margin: 1.8em 0 0.6em;
            color: var(--primary-dark);
            border-left: 4px solid var(--accent);
            padding-left: 16px;
        }
        .article-body .content h3 {
            font-size: 1.25rem;
            margin: 1.6em 0 0.5em;
            color: var(--primary);
        }
        .article-body .content img {
            border-radius: var(--radius);
            margin: 1.8em 0;
            box-shadow: var(--shadow);
        }
        .article-body .content ul, .article-body .content ol {
            margin: 1em 0 1.4em 1.6em;
        }
        .article-body .content li {
            margin-bottom: 0.5em;
            list-style: disc;
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(212,69,26,0.05);
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-body .content a { color: var(--accent); text-decoration: underline; }
        .article-body .content a:hover { color: var(--accent-dark); }
        .article-footer-meta {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-footer-meta .tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .article-footer-meta .tags a {
            background: var(--bg);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .article-footer-meta .tags a:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
        .article-footer-meta .share {
            display: flex;
            gap: 10px;
        }
        .article-footer-meta .share a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .article-footer-meta .share a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h4 {
            font-size: 1.15rem;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--primary-dark);
        }
        .sidebar-card h4 i { color: var(--accent); }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text);
            transition: all var(--transition);
        }
        .sidebar-list a:hover { color: var(--accent); }
        .sidebar-list .thumb {
            width: 64px;
            height: 48px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--border);
        }
        .sidebar-list .info { flex: 1; }
        .sidebar-list .info .title {
            font-weight: 600;
            font-size: 0.95rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .sidebar-list .info .date {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        .sidebar-cta {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: #fff;
            padding: 32px 24px;
            text-align: center;
            border-radius: var(--radius);
        }
        .sidebar-cta h4 { color: #fff; justify-content: center; }
        .sidebar-cta p { color: rgba(255,255,255,0.8); font-size: 0.95rem; margin-bottom: 18px; }
        .sidebar-cta .btn {
            background: var(--accent);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            display: inline-block;
            transition: all var(--transition);
            box-shadow: 0 4px 14px rgba(212,69,26,0.3);
        }
        .sidebar-cta .btn:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,69,26,0.4); }

        /* ===== Related Section ===== */
        .related-section {
            background: var(--bg-alt);
            padding: 60px 0;
            border-top: 1px solid var(--border);
        }
        .related-section h2 {
            font-size: 1.8rem;
            margin-bottom: 32px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .related-card .body {
            padding: 20px;
        }
        .related-card .body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .body p {
            font-size: 0.9rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found-box .icon {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .not-found-box h2 { font-size: 2rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-light); margin-bottom: 24px; font-size: 1.1rem; }
        .not-found-box .btn {
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            transition: all var(--transition);
        }
        .not-found-box .btn:hover { background: var(--primary-light); transform: translateY(-2px); }

        /* ===== Footer (shared) ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 30px;
            margin-bottom: var(--tab-height);
        }
        .footer .logo { color: #fff; margin-bottom: 16px; }
        .footer .logo .logo-icon { background: var(--accent); }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p { font-size: 0.95rem; line-height: 1.7; max-width: 340px; color: rgba(255,255,255,0.65); }
        .footer-col h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.65);
            font-size: 0.92rem;
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover { color: var(--accent-light); padding-left: 4px; }
        .footer-col a i { width: 20px; color: var(--accent-light); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.88rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--accent-light); }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a {
            color: rgba(255,255,255,0.5);
            font-size: 1.3rem;
            transition: all var(--transition);
        }
        .footer-social a:hover { color: var(--accent-light); transform: scale(1.15); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .mobile-tab { display: block; }
            .header-inner { padding: 0 16px; }
            .article-hero { padding: 40px 0 36px; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-body { padding: 24px 20px; }
            .article-layout { gap: 32px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer { padding: 40px 0 80px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-hero .meta { flex-wrap: wrap; gap: 12px; }
            .article-footer-meta { flex-direction: column; align-items: flex-start; }
            .sidebar-card { padding: 20px 16px; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.5rem; }
            .article-body { padding: 18px 14px; }
            .article-body .content { font-size: 1rem; }
            .sidebar-list .thumb { width: 48px; height: 36px; }
            .mobile-tab a { min-width: 50px; padding: 4px 10px; font-size: 0.65rem; }
            .mobile-tab a i { font-size: 1.1rem; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1b2d;
            --primary-light: #1a2a4a;
            --accent: #e85d04;
            --accent-hover: #f06a15;
            --accent-glow: rgba(232, 93, 4, 0.25);
            --danger: #dc2f02;
            --bg-body: #0a0f1a;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --bg-elevated: rgba(255, 255, 255, 0.06);
            --text-primary: #f0f0f0;
            --text-secondary: #c8d0d8;
            --text-weak: #7a8a9a;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.15);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 22px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 40px rgba(232, 93, 4, 0.08);
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
            --tab-h: 64px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            font-size: 16px;
            padding-top: var(--header-h);
            padding-bottom: var(--tab-h);
        }
        @media (min-width: 769px) {
            body {
                padding-bottom: 0;
            }
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 头部导航 (桌面) ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(10, 15, 26, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition);
        }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.45rem;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            transition: opacity var(--transition);
        }
        .logo:hover {
            opacity: 0.85;
            color: var(--text-primary);
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent), var(--danger));
            color: #fff;
            font-size: 1.15rem;
            flex-shrink: 0;
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-desktop a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.92rem;
            transition: all var(--transition);
            color: var(--text-secondary);
            position: relative;
        }
        .nav-desktop a:hover {
            color: var(--text-primary);
            background: var(--bg-card);
        }
        .nav-desktop a.active {
            color: var(--accent);
            background: var(--accent-glow);
        }
        .nav-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-desktop a.nav-cta {
            background: linear-gradient(135deg, var(--accent), var(--danger));
            color: #fff;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(232, 93, 4, 0.3);
            transition: all var(--transition);
        }
        .nav-desktop a.nav-cta:hover {
            box-shadow: 0 6px 28px rgba(232, 93, 4, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .nav-desktop a.nav-cta i {
            margin-right: 6px;
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .header-inner {
                justify-content: center;
            }
        }

        /* ===== 底部 Tab 导航 (移动端) ===== */
        .bottom-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--tab-h);
            background: rgba(10, 15, 26, 0.96);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid var(--border-color);
            padding: 0 8px;
            align-items: center;
            justify-content: space-around;
        }
        .bottom-tab-nav .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            color: var(--text-weak);
            font-size: 0.65rem;
            font-weight: 500;
            transition: all var(--transition);
            min-width: 56px;
            position: relative;
        }
        .bottom-tab-nav .tab-item i {
            font-size: 1.2rem;
            transition: transform var(--transition);
        }
        .bottom-tab-nav .tab-item:hover {
            color: var(--text-secondary);
        }
        .bottom-tab-nav .tab-item.active {
            color: var(--accent);
        }
        .bottom-tab-nav .tab-item.active i {
            transform: scale(1.1);
        }
        .bottom-tab-nav .tab-item.active::after {
            content: '';
            position: absolute;
            top: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .bottom-tab-nav .tab-item.tab-cta {
            color: var(--accent);
        }
        .bottom-tab-nav .tab-item.tab-cta i {
            color: var(--accent);
        }

        @media (max-width: 768px) {
            .bottom-tab-nav {
                display: flex;
            }
        }

        /* ===== Hero / 分类横幅 ===== */
        .category-hero {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            background: var(--primary);
            border-bottom: 1px solid var(--border-color);
        }
        .category-hero .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.4;
            transform: scale(1.02);
            transition: transform 0.6s ease;
        }
        .category-hero:hover .hero-bg {
            transform: scale(1.05);
        }
        .category-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 15, 26, 0.7) 0%, rgba(10, 15, 26, 0.85) 60%, var(--bg-body) 100%);
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 24px 60px;
            max-width: 780px;
        }
        .category-hero .hero-badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 20px;
            background: var(--accent-glow);
            color: var(--accent);
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 18px;
            border: 1px solid rgba(232, 93, 4, 0.2);
        }
        .category-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 50%, var(--text-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .category-hero .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .category-hero .hero-stats .stat-item {
            text-align: center;
        }
        .category-hero .hero-stats .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .category-hero .hero-stats .stat-label {
            font-size: 0.8rem;
            color: var(--text-weak);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .category-hero {
                min-height: 260px;
            }
            .category-hero .hero-content {
                padding: 60px 16px 40px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .category-hero .hero-stats {
                gap: 24px;
            }
            .category-hero .hero-stats .stat-num {
                font-size: 1.4rem;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-dark {
            background: var(--primary);
        }
        .section-border {
            border-top: 1px solid var(--border-color);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }
        .section-header p {
            color: var(--text-secondary);
            font-size: 1rem;
            max-width: 560px;
            margin: 0 auto;
        }
        .section-header .header-tag {
            display: inline-block;
            padding: 2px 14px;
            border-radius: 20px;
            background: var(--accent-glow);
            color: var(--accent);
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            margin-bottom: 12px;
            border: 1px solid rgba(232, 93, 4, 0.15);
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .card-grid.col-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid.col-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid.col-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 600px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid.col-2,
            .card-grid.col-4 {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 测评卡片 ===== */
        .review-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .review-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-strong);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .review-card .card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--primary);
        }
        .review-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .review-card:hover .card-img img {
            transform: scale(1.06);
        }
        .review-card .card-img .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 3px 12px;
            border-radius: 16px;
            background: rgba(232, 93, 4, 0.85);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            backdrop-filter: blur(4px);
        }
        .review-card .card-img .card-rating {
            position: absolute;
            bottom: 12px;
            right: 12px;
            padding: 4px 12px;
            border-radius: 16px;
            background: rgba(0, 0, 0, 0.7);
            color: #ffd700;
            font-size: 0.8rem;
            font-weight: 700;
            backdrop-filter: blur(4px);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .review-card .card-img .card-rating i {
            font-size: 0.7rem;
        }
        .review-card .card-body {
            padding: 20px 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .review-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .review-card .card-body p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }
        .review-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
            font-size: 0.78rem;
            color: var(--text-weak);
        }
        .review-card .card-meta .card-cat {
            padding: 2px 10px;
            border-radius: 12px;
            background: var(--bg-elevated);
            color: var(--text-secondary);
        }
        .review-card .card-meta .card-link {
            color: var(--accent);
            font-weight: 600;
            transition: all var(--transition);
        }
        .review-card .card-meta .card-link:hover {
            color: var(--accent-hover);
            gap: 4px;
        }

        @media (max-width: 768px) {
            .review-card .card-body {
                padding: 16px 16px 20px;
            }
            .review-card .card-body h3 {
                font-size: 1rem;
            }
        }

        /* ===== 标准卡片（测评维度等） ===== */
        .standard-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            text-align: center;
        }
        .standard-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-strong);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card);
        }
        .standard-card .std-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 16px;
            display: block;
        }
        .standard-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .standard-card p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.6;
        }
        .standard-card .std-bar {
            margin-top: 16px;
            height: 4px;
            border-radius: 4px;
            background: var(--border-color);
            overflow: hidden;
        }
        .standard-card .std-bar .fill {
            height: 100%;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--accent), var(--danger));
            transition: width 0.8s ease;
        }

        @media (max-width: 768px) {
            .standard-card {
                padding: 20px 16px;
            }
        }

        /* ===== 列表/资讯区块 ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            display: flex;
            gap: 18px;
            padding: 18px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .news-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-strong);
            transform: translateX(4px);
        }
        .news-item .news-img {
            width: 100px;
            height: 72px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--primary);
        }
        .news-item .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-item .news-info {
            flex: 1;
            min-width: 0;
        }
        .news-item .news-info h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .news-item .news-info p {
            color: var(--text-secondary);
            font-size: 0.84rem;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 6px;
            font-size: 0.75rem;
            color: var(--text-weak);
        }
        .news-item .news-meta .badge {
            padding: 1px 10px;
            border-radius: 10px;
            background: var(--accent-glow);
            color: var(--accent);
            font-size: 0.65rem;
            font-weight: 600;
        }

        @media (max-width: 600px) {
            .news-item {
                flex-direction: column;
                padding: 14px;
            }
            .news-item .news-img {
                width: 100%;
                height: 140px;
            }
        }

        /* ===== FAQ ===== */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .faq-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-strong);
        }
        .faq-item .faq-q {
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .faq-item .faq-q i {
            color: var(--accent);
            font-size: 0.8rem;
        }
        .faq-item .faq-a {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.7;
            padding-left: 22px;
        }

        @media (max-width: 768px) {
            .faq-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== CTA 区块 ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            border: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-block h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
        }
        .cta-block p {
            color: var(--text-secondary);
            font-size: 1rem;
            max-width: 500px;
            margin: 0 auto 24px;
            position: relative;
        }
        .cta-block .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--danger));
            color: #fff;
            box-shadow: 0 4px 20px rgba(232, 93, 4, 0.3);
        }
        .btn-primary:hover {
            box-shadow: 0 6px 30px rgba(232, 93, 4, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            border-color: var(--border-strong);
            color: var(--text-primary);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .cta-block {
                padding: 36px 20px;
            }
            .cta-block h3 {
                font-size: 1.3rem;
            }
            .btn {
                padding: 10px 24px;
                font-size: 0.88rem;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
            font-size: 1.3rem;
        }
        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h5 {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-weak);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            padding: 4px 0;
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-col a i {
            width: 20px;
            margin-right: 4px;
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 0.82rem;
            color: var(--text-weak);
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 1rem;
            transition: all var(--transition);
            border: 1px solid var(--border-color);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 辅助类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 滚动条美颜 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-body);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-strong);
            border-radius: 6px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-weak);
        }

        /* ===== 聚焦状态 ===== */
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        /* ===== 淡入动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }