/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #D43131;
            --primary-dark: #B71C1C;
            --primary-light: #EF5350;
            --accent: #F5A623;
            --accent-dark: #E69500;
            --accent-light: #FFD54F;
            --dark: #1C1C3B;
            --dark-soft: #2A2A4A;
            --dark-card: #252545;
            --bg: #F5F5F7;
            --bg-card: #FFFFFF;
            --bg-section: #F0F0F5;
            --text: #1A1A2E;
            --text-light: #6B6B8A;
            --text-white: #FFFFFF;
            --border: #E8E8EE;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(28, 28, 59, 0.10);
            --shadow-hover: 0 16px 48px rgba(212, 49, 49, 0.18);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
            --transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-h: 76px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--dark);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.4rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        p {
            margin-bottom: 0.8rem;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(28, 28, 59, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(28, 28, 59, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            padding: 0 24px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }
        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent), var(--primary));
            border-radius: 10px;
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
        }
        .logo span {
            background: linear-gradient(135deg, var(--accent-light), #fff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* 导航面板 - 卡片化 */
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.06);
            padding: 4px 6px;
            border-radius: 40px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .nav-panel a {
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-panel a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.10);
        }
        .nav-panel a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(212, 49, 49, 0.35);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            background: linear-gradient(135deg, var(--accent), var(--primary));
            color: #fff;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(212, 49, 49, 0.30);
            margin-left: 8px;
            white-space: nowrap;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 49, 49, 0.40);
            color: #fff;
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: rgba(255, 255, 255, 0.08);
            padding: 10px 12px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }
        .menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: var(--header-h);
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-soft) 60%, var(--primary-dark) 100%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% {
                transform: scale(1);
            }
            100% {
                transform: scale(1.06);
            }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(212, 49, 49, 0.20) 0%, transparent 70%),
                radial-gradient(ellipse at 70% 60%, rgba(245, 166, 35, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            padding: 60px 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            background: rgba(245, 166, 35, 0.15);
            border: 1px solid rgba(245, 166, 35, 0.25);
            border-radius: 40px;
            color: var(--accent-light);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 1rem;
        }
        .hero h1 {
            color: var(--text-white);
            margin-bottom: 18px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent-light), #FF8A65);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero .subtitle {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--primary));
            color: #fff;
            box-shadow: 0 6px 24px rgba(212, 49, 49, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(212, 49, 49, 0.45);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.25);
            color: var(--text-white);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.40);
            transform: translateY(-3px);
            color: #fff;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px 48px;
            justify-content: center;
            margin-top: 52px;
            padding-top: 40px;
            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(--accent-light);
            display: block;
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 2px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section);
        }
        .section-dark {
            background: var(--dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3 {
            color: var(--text-white);
        }
        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-header .tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(212, 49, 49, 0.08);
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .section-header h2 {
            margin-bottom: 14px;
        }
        .section-header .desc {
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-dark .section-header .desc {
            color: rgba(255, 255, 255, 0.6);
        }
        .section-dark .section-header .tag {
            background: rgba(245, 166, 35, 0.15);
            color: var(--accent-light);
        }

        /* ===== 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            padding: 36px 28px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid var(--border);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .feature-card .icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, rgba(212, 49, 49, 0.08), rgba(245, 166, 35, 0.08));
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--primary);
        }
        .feature-card h3 {
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--text-light);
            font-size: 0.95rem;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid var(--border);
            cursor: pointer;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .category-card .card-img {
            height: 160px;
            background: var(--dark-soft);
            overflow: hidden;
        }
        .category-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover .card-img img {
            transform: scale(1.05);
        }
        .category-card .card-body {
            padding: 20px 18px 24px;
            text-align: center;
        }
        .category-card .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }
        .category-card .card-body p {
            color: var(--text-light);
            font-size: 0.85rem;
        }
        .category-card .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 14px;
            background: var(--primary);
            color: #fff;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* ===== 最新资讯 (CMS) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .news-card .card-img {
            height: 180px;
            overflow: hidden;
            background: var(--dark-soft);
        }
        .news-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .card-img img {
            transform: scale(1.04);
        }
        .news-card .card-content {
            padding: 22px 20px 26px;
        }
        .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 {
            padding: 2px 12px;
            background: rgba(212, 49, 49, 0.08);
            border-radius: 20px;
            color: var(--primary);
            font-weight: 600;
        }
        .news-card .meta .date {
            color: var(--text-light);
        }
        .news-card h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .news-card h3 a {
            color: var(--dark);
        }
        .news-card h3 a:hover {
            color: var(--primary);
        }
        .news-card p {
            color: var(--text-light);
            font-size: 0.9rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
        }
        .news-card .read-more:hover {
            gap: 10px;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--text-light);
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .news-empty i {
            font-size: 2.4rem;
            display: block;
            margin-bottom: 12px;
            opacity: 0.4;
        }

        /* ===== 数据 / 流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 28px;
            counter-reset: step;
        }
        .step-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.8rem;
            font-weight: 800;
            color: rgba(245, 166, 35, 0.10);
            line-height: 1;
        }
        .step-card .step-icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 18px;
            background: linear-gradient(135deg, var(--accent), var(--primary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
        }
        .step-card h3 {
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .step-card p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            color: var(--dark);
            background: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }
        .faq-question .icon {
            flex-shrink: 0;
            font-size: 1.2rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .faq-item.open .faq-question .icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .section-dark .faq-item {
            background: rgba(255, 255, 255, 0.04);
            border-color: rgba(255, 255, 255, 0.08);
        }
        .section-dark .faq-question {
            color: var(--text-white);
        }
        .section-dark .faq-answer {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--dark), var(--primary-dark));
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 16px 60px rgba(212, 49, 49, 0.25);
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }
        .cta-box h2 {
            color: var(--text-white);
            margin-bottom: 14px;
            position: relative;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
        }
        .cta-box .btn {
            position: relative;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            padding: 48px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 36px;
        }
        .footer-brand {
            max-width: 320px;
        }
        .footer-brand .logo a {
            font-size: 1.3rem;
            margin-bottom: 12px;
            display: inline-flex;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            margin-top: 12px;
            line-height: 1.7;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
        }
        .footer-links h4 {
            color: var(--text-white);
            font-size: 0.95rem;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .footer-links ul li {
            margin-bottom: 8px;
        }
        .footer-links ul a {
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .footer-links ul a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            text-align: center;
            color: rgba(255, 255, 255, 0.3);
            font-size: 0.82rem;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        /* ===== 移动端响应 ===== */
        @media (max-width: 1024px) {
            .hero-stats {
                gap: 24px 32px;
            }
            .hero-stat .num {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-h: 66px;
            }
            .nav-panel {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: rgba(28, 28, 59, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 20px;
                border-radius: 0 0 20px 20px;
                border: none;
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
                gap: 8px;
            }
            .nav-panel.open {
                display: flex;
            }
            .nav-panel a {
                padding: 12px 20px;
                width: 100%;
                text-align: center;
                font-size: 1rem;
            }
            .nav-panel .nav-cta {
                margin-left: 0;
                justify-content: center;
                width: 100%;
                margin-top: 6px;
            }
            .menu-toggle {
                display: flex;
            }
            .header-inner {
                padding: 0 16px;
            }
            .hero {
                min-height: 70vh;
            }
            .hero-content {
                padding: 40px 16px;
            }
            .hero-stats {
                gap: 20px 24px;
                margin-top: 36px;
                padding-top: 28px;
            }
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .footer-inner {
                flex-direction: column;
                gap: 28px;
            }
            .footer-links {
                gap: 28px;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .section {
                padding: 40px 0;
            }
            .cta-box {
                padding: 32px 18px;
                border-radius: var(--radius);
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 0.88rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

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

        /* 模拟图标 (Font Awesome 备用) */
        .fa,
        .fas,
        .far {
            display: inline-block;
            font-style: normal;
            font-weight: 400;
        }
        .fa-star::before {
            content: '★';
        }
        .fa-bolt::before {
            content: '⚡';
        }
        .fa-shield::before {
            content: '🛡';
        }
        .fa-arrow-right::before {
            content: '→';
        }
        .fa-chevron-right::before {
            content: '›';
        }
        .fa-clock::before {
            content: '🕐';
        }
        .fa-tag::before {
            content: '🏷';
        }
        .fa-check::before {
            content: '✓';
        }
        .fa-plus::before {
            content: '+';
        }
        .fa-download::before {
            content: '↓';
        }
        .fa-users::before {
            content: '👥';
        }
        .fa-trophy::before {
            content: '🏆';
        }
        .fa-chart::before {
            content: '📊';
        }
        .fa-file::before {
            content: '📄';
        }
        .fa-home::before {
            content: '⌂';
        }
        .fa-info::before {
            content: 'ℹ';
        }
        .fa-question::before {
            content: '?';
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e83e3e;
            --primary-dark: #c62a2a;
            --primary-light: #ff6b6b;
            --secondary: #f8b739;
            --secondary-light: #ffd966;
            --accent: #2a9d8f;
            --bg-body: #f8f6f3;
            --bg-card: #ffffff;
            --bg-dark: #1e1e2a;
            --bg-dark-card: #2a2a3d;
            --text-primary: #1a1a2e;
            --text-body: #3d3d4a;
            --text-muted: #7a7a8a;
            --text-inverse: #ffffff;
            --border: #e8e4e0;
            --border-light: #f0ece8;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-hover: 0 20px 40px rgba(232,62,62,0.15);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Segoe UI','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
            --container-max: 1200px;
            --header-h: 76px;
        }

        /* ===== 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul,ol { list-style: none; }
        button,.btn { cursor: pointer; font-family: inherit; }
        input,textarea,select { font-family: inherit; font-size: 1rem; }
        h1,h2,h3,h4,h5,h6 { line-height: 1.25; color: var(--text-primary); font-weight: 700; }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255,255,255,0.98);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-primary);
            font-weight: 700;
            font-size: 1.35rem;
            letter-spacing: 0.5px;
        }
        .logo a:hover { color: var(--primary); }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.4rem;
            font-weight: 800;
            flex-shrink: 0;
        }

        /* Nav Panel - 卡片化导航面板 */
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-card);
            padding: 6px 10px;
            border-radius: 60px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .nav-panel a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-body);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-panel a:hover {
            background: rgba(232,62,62,0.08);
            color: var(--primary);
        }
        .nav-panel a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(232,62,62,0.35);
        }
        .nav-panel a.nav-cta {
            background: var(--secondary);
            color: var(--text-primary);
            font-weight: 600;
            padding: 8px 22px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-panel a.nav-cta:hover {
            background: var(--secondary-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(248,183,57,0.4);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: rgba(0,0,0,0.05); }

        /* ===== Page Hero / Banner ===== */
        .page-hero {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, #1a1a2e 0%, #2d1b3d 50%, #1a1a2e 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(232,62,62,0.15) 0%, transparent 70%);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 3rem;
            color: #fff;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .page-hero h1 span { color: var(--secondary); }
        .page-hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.85);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }
        .hero-tags .tag {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: 40px;
            color: rgba(255,255,255,0.9);
            font-size: 0.85rem;
            font-weight: 500;
            transition: all var(--transition);
        }
        .hero-tags .tag:hover {
            background: rgba(232,62,62,0.35);
            border-color: var(--primary-light);
            transform: translateY(-2px);
        }

        /* ===== Section Base ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-inverse);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-header h2 i {
            color: var(--primary);
            margin-right: 8px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header .overline {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--primary);
            margin-bottom: 8px;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .card-body {
            padding: 24px;
        }
        .card-body .tag {
            display: inline-block;
            padding: 3px 12px;
            background: rgba(232,62,62,0.08);
            color: var(--primary);
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-body h3 a { color: var(--text-primary); }
        .card-body h3 a:hover { color: var(--primary); }
        .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: 4px;
        }
        .card-meta i { margin-right: 4px; font-size: 0.75rem; }

        /* ===== Featured / Large Card ===== */
        .featured-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
        }
        .featured-card .fc-image {
            height: 100%;
            min-height: 320px;
            object-fit: cover;
            width: 100%;
        }
        .featured-card .fc-body {
            padding: 40px 44px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-card .fc-body .tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--secondary);
            color: var(--text-primary);
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .featured-card .fc-body h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .featured-card .fc-body p {
            font-size: 0.98rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 16px;
            left: 20px;
            font-size: 2.8rem;
            font-weight: 900;
            color: rgba(232,62,62,0.08);
            line-height: 1;
        }
        .step-icon {
            width: 64px;
            height: 64px;
            background: rgba(232,62,62,0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: all var(--transition);
        }
        .step-item:hover .step-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.85rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-answer a { color: var(--primary); font-weight: 500; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            font-size: 2.2rem;
            color: #fff;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.85);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: var(--secondary);
            color: var(--text-primary);
            font-size: 1.05rem;
            font-weight: 700;
            border-radius: 60px;
            border: none;
            transition: all var(--transition);
            box-shadow: 0 8px 30px rgba(248,183,57,0.35);
        }
        .cta-btn:hover {
            background: var(--secondary-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(248,183,57,0.5);
            color: var(--text-primary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.6fr 2fr;
            gap: 48px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo a {
            color: #fff;
            font-size: 1.2rem;
        }
        .footer-brand .logo a:hover { color: var(--primary-light); }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin-top: 14px;
            max-width: 360px;
            color: rgba(255,255,255,0.55);
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .footer-links h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-links ul li { margin-bottom: 10px; }
        .footer-links ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 0.88rem;
            transition: all var(--transition);
        }
        .footer-links ul li a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            text-align: center;
            padding-top: 24px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .featured-card { grid-template-columns: 1fr; }
            .featured-card .fc-image { min-height: 240px; max-height: 320px; }
            .featured-card .fc-body { padding: 32px; }
            .page-hero h1 { font-size: 2.4rem; }
        }

        @media (max-width: 768px) {
            .nav-panel {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 12px;
                right: 12px;
                background: var(--bg-card);
                border-radius: var(--radius-md);
                padding: 16px;
                flex-direction: column;
                gap: 8px;
                box-shadow: var(--shadow-lg);
                border: 1px solid var(--border-light);
            }
            .nav-panel.open { display: flex; }
            .nav-panel a { width: 100%; text-align: center; padding: 12px 18px; }
            .nav-panel a.nav-cta { justify-content: center; }
            .nav-toggle { display: block; }

            .page-hero { padding: 120px 0 56px; min-height: 300px; }
            .page-hero h1 { font-size: 1.8rem; }
            .page-hero p { font-size: 1rem; }

            .section { padding: 56px 0; }
            .section-header h2 { font-size: 1.6rem; }

            .card-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
            .steps-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }

            .featured-card .fc-body { padding: 24px; }
            .featured-card .fc-body h3 { font-size: 1.2rem; }

            .footer-inner { grid-template-columns: 1fr; gap: 32px; }
            .footer-links { grid-template-columns: 1fr 1fr; gap: 24px; }

            .cta-section h2 { font-size: 1.6rem; }
            .cta-btn { padding: 14px 32px; font-size: 0.95rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-hero h1 { font-size: 1.5rem; }
            .page-hero p { font-size: 0.92rem; }
            .footer-links { grid-template-columns: 1fr; }
            .hero-tags .tag { font-size: 0.78rem; padding: 4px 14px; }
            .card-body { padding: 18px; }
            .step-item { padding: 24px 18px; }
            .faq-question { padding: 14px 18px; font-size: 0.92rem; }
            .faq-answer { padding: 0 18px 14px; }
        }

        /* ===== Utilities ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }
        .rounded-full { border-radius: 9999px; }

        /* focus accessibility */
        a:focus-visible, button:focus-visible, .btn:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Guide-specific extras ===== */
        .guide-intro {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 40px 44px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .guide-intro h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .guide-intro p {
            font-size: 0.98rem;
            color: var(--text-muted);
            line-height: 1.8;
        }
        .guide-intro .highlight {
            color: var(--primary);
            font-weight: 600;
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 20px;
        }
        .tag-list .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 40px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-body);
            transition: all var(--transition);
        }
        .tag-list .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(232,62,62,0.04);
            transform: translateY(-2px);
        }
        .tag-list .tag-item i { color: var(--primary); font-size: 0.8rem; }

        /* badge / stats */
        .stat-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 32px;
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }
        .stat-item .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stat-row { grid-template-columns: 1fr 1fr; }
            .guide-intro { padding: 28px 24px; }
        }
        @media (max-width: 520px) {
            .stat-row { grid-template-columns: 1fr; }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #D4A843;
            --primary-dark: #B8922E;
            --primary-light: #E8C86A;
            --secondary: #1E1E2E;
            --secondary-light: #2C2C42;
            --accent: #F5A623;
            --bg-body: #F8F6F0;
            --bg-card: #FFFFFF;
            --bg-dark: #1A1A2E;
            --bg-section: #F0EDE4;
            --text-primary: #1E1E2E;
            --text-secondary: #4A4A5A;
            --text-muted: #7A7A8A;
            --text-light: #F8F6F0;
            --border-color: #E5E0D6;
            --border-light: #F0EDE4;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-hover: 0 16px 48px rgba(0,0,0,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --content-width: 820px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

        /* ===== 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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; transition: var(--transition); }
        input, textarea { font-family: inherit; transition: var(--transition); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.6rem; letter-spacing: -0.02em; }
        h2 { font-size: 2.0rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1em; color: var(--text-secondary); }
        strong { font-weight: 600; color: var(--text-primary); }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }
        .logo a { display: flex; align-items: center; gap: 10px; color: inherit; }
        .logo a:hover { color: var(--primary); }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            font-weight: 800;
        }
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-panel a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-panel a:hover {
            color: var(--primary);
            background: rgba(212,168,67,0.08);
        }
        .nav-panel a.active {
            color: var(--primary);
            background: rgba(212,168,67,0.12);
            font-weight: 600;
        }
        .nav-panel a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 24px;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(212,168,67,0.3);
        }
        .nav-panel a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(212,168,67,0.4);
            color: #fff;
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            background: var(--bg-body);
            border: 1px solid var(--border-color);
        }
        .nav-toggle:hover { background: var(--border-light); }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 60px 24px;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(26,26,46,0.60) 60%, rgba(26,26,46,0.40) 100%);
            z-index: 1;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: var(--content-width);
        }
        .article-banner .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-banner .article-category {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .article-banner .article-date {
            font-size: 0.90rem;
            color: rgba(255,255,255,0.75);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-banner .article-date i { font-size: 0.8rem; }
        .article-banner h1 {
            color: #fff;
            font-size: 2.4rem;
            line-height: 1.35;
            max-width: 720px;
            margin: 0 auto;
            text-shadow: 0 2px 12px rgba(0,0,0,0.2);
        }
        .article-banner .article-desc {
            margin-top: 16px;
            font-size: 1.05rem;
            color: rgba(255,255,255,0.80);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: var(--spacing-section) 0;
            background: var(--bg-body);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            max-width: var(--content-width);
            margin: 0 auto;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 48px 56px;
            border: 1px solid var(--border-light);
        }
        .article-body .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-body .article-content p {
            margin-bottom: 1.25em;
        }
        .article-body .article-content h2,
        .article-body .article-content h3,
        .article-body .article-content h4 {
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            color: var(--text-primary);
        }
        .article-body .article-content ul,
        .article-body .article-content ol {
            margin-bottom: 1.25em;
            padding-left: 1.5em;
        }
        .article-body .article-content li {
            margin-bottom: 0.4em;
            list-style: disc;
        }
        .article-body .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body .article-content a:hover { color: var(--primary-dark); }
        .article-body .article-content img {
            border-radius: var(--radius-md);
            margin: 1.5em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 12px 24px;
            margin: 1.5em 0;
            background: var(--bg-section);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: var(--bg-section);
            color: var(--text-secondary);
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 20px;
        }
        .article-share span {
            font-size: 0.90rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-section);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .article-share a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Article Not Found ===== */
        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            max-width: 520px;
            margin: 0 auto;
        }
        .article-not-found .nf-icon {
            font-size: 3.6rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .article-not-found h2 {
            font-size: 1.6rem;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 28px;
        }
        .article-not-found .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(212,168,67,0.3);
        }
        .article-not-found .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(212,168,67,0.4);
            color: #fff;
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: var(--spacing-section) 0;
            background: var(--bg-section);
        }
        .related-section .section-header {
            text-align: center;
            margin-bottom: var(--spacing-block);
        }
        .related-section .section-header h2 {
            font-size: 1.8rem;
            margin-bottom: 8px;
        }
        .related-section .section-header p {
            color: var(--text-muted);
            font-size: 1rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--bg-section);
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h3 a { color: var(--text-primary); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body .card-excerpt {
            font-size: 0.90rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-body .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .related-card .card-body .card-meta .cat {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            background: var(--bg-section);
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--spacing-section) 0;
            background: var(--bg-body);
        }
        .faq-section .section-header {
            text-align: center;
            margin-bottom: var(--spacing-block);
        }
        .faq-section .section-header h2 { font-size: 1.8rem; margin-bottom: 8px; }
        .faq-section .section-header p { color: var(--text-muted); font-size: 1rem; }
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-color); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            gap: 12px;
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 280px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: var(--spacing-section) 0;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.88) 0%, rgba(26,26,46,0.72) 100%);
            z-index: 1;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-box {
            text-align: center;
            max-width: 620px;
            margin: 0 auto;
        }
        .cta-box h2 {
            color: #fff;
            font-size: 2.0rem;
            margin-bottom: 12px;
        }
        .cta-box p {
            color: rgba(255,255,255,0.80);
            font-size: 1.05rem;
            margin-bottom: 28px;
        }
        .cta-box .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-size: 1.05rem;
            font-weight: 700;
            box-shadow: 0 6px 24px rgba(212,168,67,0.35);
            transition: var(--transition);
        }
        .cta-box .cta-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(212,168,67,0.45);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.80);
            padding: 60px 24px 32px;
        }
        .site-footer .container { max-width: var(--max-width); margin: 0 auto; }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.6fr 2fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo .logo-icon { background: var(--primary); }
        .footer-brand p { font-size: 0.92rem; color: rgba(255,255,255,0.60); line-height: 1.7; max-width: 380px; }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .footer-links h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-links ul li { margin-bottom: 10px; }
        .footer-links ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .footer-links ul li a:hover { color: var(--primary); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom a { color: rgba(255,255,255,0.55); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Buttons & Shared ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(212,168,67,0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(212,168,67,0.4);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-color);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(212,168,67,0.05);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-banner h1 { font-size: 2.0rem; }
            .article-body { padding: 36px 32px; }
            .footer-inner { grid-template-columns: 1fr; gap: 32px; }
            .footer-links { grid-template-columns: repeat(3, 1fr); }
        }
        @media (max-width: 768px) {
            .nav-panel { display: none; }
            .nav-toggle { display: flex; }
            .nav-panel.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                border-bottom: 1px solid var(--border-light);
                padding: 16px 24px;
                gap: 6px;
                box-shadow: var(--shadow-md);
            }
            .nav-panel.open a { width: 100%; padding: 12px 18px; }
            .nav-panel.open a.nav-cta { text-align: center; }
            .article-banner { min-height: 260px; padding: 40px 20px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-banner .article-desc { font-size: 0.95rem; }
            .article-body { padding: 28px 20px; border-radius: var(--radius-md); }
            .article-body .article-content { font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr; gap: 20px; }
            .faq-question { font-size: 0.95rem; padding: 16px 18px; }
            .cta-box h2 { font-size: 1.5rem; }
            .footer-links { grid-template-columns: repeat(2, 1fr); gap: 24px; }
            :root { --spacing-section: 48px; --spacing-block: 32px; }
            h1 { font-size: 2.0rem; }
            h2 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .header-inner { height: 58px; }
            .logo { font-size: 1.1rem; }
            .logo-icon { width: 32px; height: 32px; font-size: 1rem; }
            .article-banner h1 { font-size: 1.3rem; }
            .article-banner .article-meta { gap: 10px; }
            .article-body { padding: 20px 16px; }
            .footer-links { grid-template-columns: 1fr; gap: 20px; }
            .article-share { flex-wrap: wrap; }
            .cta-box .cta-btn { width: 100%; justify-content: center; }
            .related-card .card-img { height: 140px; }
        }