/* roulang page: index */
:root {
            --color-primary: #2563eb;
            --color-primary-dark: #1d4ed8;
            --color-accent: #f59e0b;
            --color-surface: #f8fafc;
            --color-card: #ffffff;
            --color-muted: #64748b;
            --color-deep: #1e293b;
            --color-border: #e2e8f0;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-2xl: 1.5rem;
            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 2px 8px rgba(0, 0, 0, 0.08), 0 8px 28px rgba(0, 0, 0, 0.06);
            --shadow-nav: 0 2px 20px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.04);
            --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            line-height: 1.7;
            color: var(--color-deep);
            background-color: #f1f5f9;
            min-height: 100vh;
        }

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

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

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

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

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

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

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

        /* 导航卡片面板 */
        .nav-panel {
            background: var(--color-card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-nav);
            padding: 0.75rem 1.25rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            position: relative;
            z-index: 100;
            transition: box-shadow var(--transition-smooth);
        }

        .nav-panel:hover {
            box-shadow: 0 4px 28px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.05);
        }

        .nav-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: color var(--transition-fast);
        }

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

        .nav-logo i {
            font-size: 1.4rem;
            color: var(--color-accent);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            flex-wrap: wrap;
        }

        .nav-link-item {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-md);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-muted);
            background: transparent;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-link-item:hover {
            color: var(--color-primary);
            background: #eff6ff;
        }

        .nav-link-item.active {
            color: var(--color-primary);
            background: #eff6ff;
            font-weight: 600;
            box-shadow: inset 0 0 0 1px #bfdbfe;
        }

        .nav-link-item i {
            font-size: 0.85rem;
            opacity: 0.8;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1.3rem;
            border-radius: 2rem;
            font-size: 0.88rem;
            font-weight: 600;
            background: var(--color-primary);
            color: #fff;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-btn);
        }

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

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-btn);
        }

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-deep);
            padding: 0.4rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .mobile-menu-btn:hover {
            background: #f1f5f9;
            color: var(--color-primary);
        }

        .mobile-menu-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 200;
            opacity: 0;
            transition: opacity var(--transition-smooth);
            pointer-events: none;
        }

        .mobile-menu-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            max-width: 85vw;
            height: 100%;
            background: #fff;
            z-index: 210;
            padding: 1.5rem;
            overflow-y: auto;
            transition: right var(--transition-smooth);
            box-shadow: -4px 0 30px rgba(0, 0, 0, 0.18);
            border-radius: 1.5rem 0 0 1.5rem;
        }

        .mobile-menu-drawer.open {
            right: 0;
        }

        .mobile-menu-drawer .nav-link-item {
            display: flex;
            width: 100%;
            padding: 0.75rem 1rem;
            font-size: 1rem;
            border-radius: var(--radius-md);
            margin-bottom: 0.3rem;
        }

        .mobile-menu-drawer .nav-cta {
            display: flex;
            justify-content: center;
            width: 100%;
            margin-top: 1rem;
            border-radius: 2rem;
        }

        .mobile-menu-close {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            background: #f1f5f9;
            border: none;
            font-size: 1.2rem;
            color: var(--color-deep);
            margin-bottom: 1.25rem;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .mobile-menu-close:hover {
            background: #e2e8f0;
            color: #ef4444;
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .nav-cta.desktop-only {
                display: none;
            }

            .mobile-menu-btn {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .mobile-menu-overlay,
            .mobile-menu-drawer {
                display: block;
            }

            .nav-panel {
                padding: 0.6rem 1rem;
            }

            .nav-logo {
                font-size: 1.1rem;
            }
        }

        @media (min-width: 769px) {
            .mobile-menu-overlay,
            .mobile-menu-drawer {
                display: none !important;
            }

            .nav-cta.desktop-only {
                display: inline-flex;
            }
        }

        /* Hero区域 */
        .hero-section {
            position: relative;
            border-radius: var(--radius-2xl);
            overflow: hidden;
            min-height: 460px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            margin-top: 1.25rem;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30, 58, 138, 0.88) 0%, rgba(37, 99, 235, 0.78) 40%, rgba(30, 64, 175, 0.85) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 3rem 2rem;
            max-width: 680px;
            color: #fff;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.35rem 1rem;
            border-radius: 2rem;
            font-size: 0.82rem;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            margin-bottom: 1.25rem;
            letter-spacing: 0.03em;
        }

        .hero-badge i {
            font-size: 0.75rem;
            color: #fbbf24;
        }

        .hero-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 0 0 1rem 0;
            letter-spacing: 0.01em;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }

        .hero-subtitle {
            font-size: 1.15rem;
            line-height: 1.7;
            margin: 0 0 1.75rem 0;
            opacity: 0.92;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }

        .btn-primary-hero {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.8rem;
            border-radius: 2rem;
            font-size: 1rem;
            font-weight: 600;
            background: #ffffff;
            color: #1e40af;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
        }

        .btn-primary-hero:hover {
            background: #f0f7ff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.25);
        }

        .btn-outline-hero {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.8rem;
            border-radius: 2rem;
            font-size: 1rem;
            font-weight: 600;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.6);
            transition: all var(--transition-fast);
        }

        .btn-outline-hero:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: 380px;
                border-radius: var(--radius-xl);
                margin-top: 0.75rem;
            }

            .hero-content {
                padding: 2rem 1.25rem;
            }

            .hero-title {
                font-size: 1.8rem;
            }

            .hero-subtitle {
                font-size: 1rem;
            }

            .hero-buttons {
                flex-direction: column;
            }

            .btn-primary-hero,
            .btn-outline-hero {
                justify-content: center;
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .hero-section {
                min-height: 340px;
            }

            .hero-title {
                font-size: 1.5rem;
            }

            .hero-subtitle {
                font-size: 0.9rem;
            }
        }

        /* 板块通用 */
        .section {
            padding: 3.5rem 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 2.5rem;
        }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-primary);
            background: #eff6ff;
            padding: 0.3rem 0.9rem;
            border-radius: 2rem;
            margin-bottom: 0.75rem;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-deep);
            margin: 0 0 0.6rem 0;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--color-muted);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section {
                padding: 2.5rem 0;
            }

            .section-title {
                font-size: 1.55rem;
            }

            .section-desc {
                font-size: 0.95rem;
            }
        }

        /* 卡片网格 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .card-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .card-grid.cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.25rem;
            }

            .card-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }

            .card-grid.cols-2,
            .card-grid.cols-4 {
                grid-template-columns: 1fr;
            }
        }

        /* 基础卡片 */
        .card {
            background: var(--color-card);
            border-radius: var(--radius-xl);
            padding: 1.75rem;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            border: 1px solid transparent;
            position: relative;
            overflow: hidden;
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: #e2e8f0;
        }

        .card-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 3rem;
            height: 3rem;
            border-radius: var(--radius-lg);
            font-size: 1.3rem;
            margin-bottom: 1rem;
            flex-shrink: 0;
        }

        .card-icon.blue {
            background: #eff6ff;
            color: #2563eb;
        }

        .card-icon.amber {
            background: #fffbeb;
            color: #f59e0b;
        }

        .card-icon.green {
            background: #f0fdf4;
            color: #16a34a;
        }

        .card-icon.purple {
            background: #faf5ff;
            color: #7c3aed;
        }

        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-deep);
            margin: 0 0 0.5rem 0;
            line-height: 1.4;
        }

        .card-text {
            font-size: 0.9rem;
            color: var(--color-muted);
            line-height: 1.65;
            margin: 0;
        }

        /* 图片卡片 */
        .card-image-top {
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
            overflow: hidden;
            margin: -1.75rem -1.75rem 1.25rem -1.75rem;
            aspect-ratio: 16 / 10;
            background: #e2e8f0;
        }

        .card-image-top img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

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

        /* CMS列表卡片 */
        .cms-list-item {
            display: flex;
            gap: 1.25rem;
            background: var(--color-card);
            border-radius: var(--radius-xl);
            padding: 1.25rem;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            border: 1px solid transparent;
            align-items: flex-start;
        }

        .cms-list-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-1px);
            border-color: #e2e8f0;
        }

        .cms-list-thumb {
            width: 140px;
            min-width: 140px;
            height: 100px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: #e2e8f0;
            flex-shrink: 0;
        }

        .cms-list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .cms-list-item:hover .cms-list-thumb img {
            transform: scale(1.05);
        }

        .cms-list-body {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .cms-list-category {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.65rem;
            border-radius: 1rem;
            background: #eff6ff;
            color: #2563eb;
            width: fit-content;
            white-space: nowrap;
        }

        .cms-list-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-deep);
            line-height: 1.4;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .cms-list-item:hover .cms-list-title {
            color: var(--color-primary);
        }

        .cms-list-summary {
            font-size: 0.85rem;
            color: var(--color-muted);
            line-height: 1.5;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .cms-list-meta {
            font-size: 0.78rem;
            color: #94a3b8;
            display: flex;
            gap: 1rem;
            align-items: center;
        }

        .cms-list-meta i {
            font-size: 0.7rem;
        }

        @media (max-width: 640px) {
            .cms-list-item {
                flex-direction: column;
                gap: 0.75rem;
                padding: 1rem;
            }

            .cms-list-thumb {
                width: 100%;
                min-width: 100%;
                height: 160px;
            }
        }

        /* 统计数字 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .stat-card {
            background: var(--color-card);
            border-radius: var(--radius-xl);
            padding: 1.75rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            border: 1px solid transparent;
        }

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

        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1;
            margin-bottom: 0.5rem;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--color-muted);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }

            .stat-number {
                font-size: 2rem;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 流程步骤 */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            max-width: 720px;
            margin: 0 auto;
        }

        .step-item {
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            background: var(--color-card);
            border-radius: var(--radius-xl);
            padding: 1.5rem 1.75rem;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            border: 1px solid transparent;
        }

        .step-item:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: #e2e8f0;
        }

        .step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.8rem;
            height: 2.8rem;
            min-width: 2.8rem;
            border-radius: 50%;
            font-size: 1.15rem;
            font-weight: 800;
            color: #fff;
            background: var(--color-primary);
            flex-shrink: 0;
        }

        .step-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-deep);
            margin: 0 0 0.3rem 0;
        }

        .step-body p {
            font-size: 0.9rem;
            color: var(--color-muted);
            margin: 0;
            line-height: 1.6;
        }

        @media (max-width: 640px) {
            .step-item {
                padding: 1.25rem;
                gap: 1rem;
            }

            .step-number {
                width: 2.4rem;
                height: 2.4rem;
                min-width: 2.4rem;
                font-size: 1rem;
            }
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .faq-item {
            background: var(--color-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid transparent;
            transition: all var(--transition-smooth);
        }

        .faq-item:hover {
            border-color: #e2e8f0;
            box-shadow: var(--shadow-card-hover);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 1.15rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-deep);
            background: none;
            border: none;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            transition: color var(--transition-fast);
        }

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

        .faq-question i {
            font-size: 0.85rem;
            color: var(--color-muted);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
        }

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

        .faq-answer {
            padding: 0 1.5rem 1.25rem 1.5rem;
            font-size: 0.9rem;
            color: var(--color-muted);
            line-height: 1.7;
            display: none;
        }

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

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

        /* CTA板块 */
        .cta-section {
            background: linear-gradient(135deg, #1e40af 0%, #2563eb 40%, #1d4ed8 100%);
            border-radius: var(--radius-2xl);
            padding: 3.5rem 2.5rem;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }

        .cta-title {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 0 0 0.75rem 0;
            position: relative;
            z-index: 1;
        }

        .cta-desc {
            font-size: 1.05rem;
            opacity: 0.9;
            margin: 0 auto 1.75rem auto;
            max-width: 500px;
            position: relative;
            z-index: 1;
            line-height: 1.6;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2.2rem;
            border-radius: 2rem;
            font-size: 1rem;
            font-weight: 700;
            background: #fff;
            color: #1e40af;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.2);
            position: relative;
            z-index: 1;
        }

        .cta-btn:hover {
            background: #f0f7ff;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 2.5rem 1.5rem;
                border-radius: var(--radius-xl);
            }

            .cta-title {
                font-size: 1.5rem;
            }

            .cta-desc {
                font-size: 0.95rem;
            }
        }

        /* 页脚 */
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 3rem 0 2rem 0;
            margin-top: 1rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }

        .footer-brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .footer-desc {
            font-size: 0.88rem;
            line-height: 1.7;
            opacity: 0.8;
            max-width: 320px;
        }

        .footer-col-title {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 0.03em;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-links a {
            font-size: 0.85rem;
            color: #94a3b8;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.82rem;
            color: #64748b;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }

        /* 空状态 */
        .empty-state {
            text-align: center;
            padding: 3rem 2rem;
            color: var(--color-muted);
            background: var(--color-card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
        }

        .empty-state i {
            font-size: 2.5rem;
            display: block;
            margin-bottom: 0.75rem;
            opacity: 0.5;
        }

        .empty-state p {
            font-size: 0.95rem;
            margin: 0;
        }

        /* 辅助 */
        .text-accent {
            color: var(--color-accent);
        }

        .bg-surface-light {
            background: #f8fafc;
        }

        .bg-white-off {
            background: #fafbfc;
        }

        @media (max-width: 520px) {
            .section {
                padding: 2rem 0;
            }

            .section-title {
                font-size: 1.35rem;
            }

            .card {
                padding: 1.25rem;
            }
        }

/* roulang page: article */
:root {
            --color-primary: #1a56db;
            --color-primary-dark: #1e40af;
            --color-primary-light: #3b82f6;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-weak: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 4px 10px -6px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px -8px rgba(0, 0, 0, 0.1);
            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        input {
            font-family: inherit;
        }

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

        /* ===== 导航面板 ===== */
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            padding: 0.875rem 1.5rem;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border-light);
            position: relative;
            z-index: 100;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--color-primary);
            white-space: nowrap;
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-logo i {
            font-size: 1.35rem;
            color: var(--color-accent);
        }

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

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.375rem;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link-item {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1rem;
            border-radius: var(--radius-md);
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--color-text-weak);
            white-space: nowrap;
            transition: all var(--transition-fast);
            background: transparent;
        }

        .nav-link-item i {
            font-size: 0.9rem;
            opacity: 0.7;
            transition: opacity var(--transition-fast);
        }

        .nav-link-item:hover {
            color: var(--color-primary);
            background: #eff6ff;
        }

        .nav-link-item:hover i {
            opacity: 1;
        }

        .nav-link-item.active {
            color: var(--color-primary);
            background: #dbeafe;
            font-weight: 600;
        }

        .nav-link-item.active i {
            opacity: 1;
            color: var(--color-primary);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            padding: 0.6rem 1.25rem;
            border-radius: var(--radius-md);
            font-size: 0.875rem;
            font-weight: 600;
            color: #ffffff;
            background: var(--color-primary);
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition-fast);
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25);
            margin-left: auto;
        }

        .nav-cta:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta i {
            font-size: 0.85rem;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 0.5rem 0.7rem;
            font-size: 1.2rem;
            color: var(--color-text);
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .mobile-menu-btn:hover {
            background: #f1f5f9;
            border-color: var(--color-primary-light);
            color: var(--color-primary);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: var(--color-text-weak);
            padding: 1rem 0 0.5rem;
        }

        .breadcrumb a {
            color: var(--color-text-weak);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
        }

        .breadcrumb .separator {
            color: var(--color-text-muted);
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* ===== 文章头部 ===== */
        .article-header-section {
            background: linear-gradient(180deg, #f0f4ff 0%, var(--color-bg) 100%);
            border-radius: var(--radius-xl);
            padding: 2.5rem 2rem;
            margin-bottom: 2rem;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--color-border-light);
        }

        .article-header-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.35rem 0.85rem;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            background: #dbeafe;
            color: var(--color-primary);
            margin-bottom: 1rem;
            white-space: nowrap;
        }

        .article-category-badge i {
            font-size: 0.7rem;
        }

        .article-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text);
            margin: 0 0 1rem;
            letter-spacing: -0.01em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: var(--color-text-weak);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        .article-meta i {
            font-size: 0.8rem;
            opacity: 0.7;
        }

        /* ===== 文章封面 ===== */
        .article-cover-wrapper {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 2rem;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--color-border-light);
            background: #f1f5f9;
        }

        .article-cover-wrapper img {
            width: 100%;
            height: auto;
            max-height: 480px;
            object-fit: cover;
            display: block;
        }

        /* ===== 文章正文 ===== */
        .article-body {
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            padding: 2.5rem 2rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            margin-bottom: 2.5rem;
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text);
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 2rem 0 1rem;
            color: var(--color-text);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e8edf5;
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 1.5rem 0 0.75rem;
            color: var(--color-text);
        }

        .article-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 1.25rem 0 0.5rem;
            color: var(--color-text);
        }

        .article-content p {
            margin: 0 0 1.15rem;
        }

        .article-content ul,
        .article-content ol {
            margin: 0.75rem 0 1.15rem;
            padding-left: 1.5rem;
        }

        .article-content li {
            margin-bottom: 0.4rem;
        }

        .article-content blockquote {
            border-left: 4px solid var(--color-primary);
            background: #f8fafd;
            margin: 1.25rem 0;
            padding: 1rem 1.25rem;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-weak);
            font-style: italic;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.25rem 0;
            max-width: 100%;
            height: auto;
        }

        .article-content a {
            color: var(--color-primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition-fast);
        }

        .article-content a:hover {
            color: var(--color-primary-dark);
        }

        .article-content code {
            background: #f1f5f9;
            padding: 0.15em 0.45em;
            border-radius: 4px;
            font-size: 0.9em;
            color: #c7254e;
        }

        .article-content pre {
            background: #1e293b;
            color: #e2e8f0;
            padding: 1.25rem;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.25rem 0;
            font-size: 0.9rem;
        }

        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.25rem 0;
            font-size: 0.95rem;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--color-border);
            padding: 0.7rem 1rem;
            text-align: left;
        }

        .article-content th {
            background: #f8fafc;
            font-weight: 600;
        }

        /* ===== 文章底部标签 ===== */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--color-border-light);
        }

        .article-tag {
            display: inline-block;
            padding: 0.3rem 0.75rem;
            border-radius: 999px;
            font-size: 0.8rem;
            background: #f1f5f9;
            color: var(--color-text-weak);
            transition: all var(--transition-fast);
        }

        .article-tag:hover {
            background: #dbeafe;
            color: var(--color-primary);
        }

        /* ===== 作者卡片 ===== */
        .author-card {
            display: flex;
            align-items: center;
            gap: 1rem;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            margin-bottom: 2.5rem;
        }

        .author-avatar {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.5rem;
            flex-shrink: 0;
        }

        .author-info h4 {
            font-size: 1rem;
            font-weight: 600;
            margin: 0 0 0.25rem;
        }

        .author-info p {
            font-size: 0.85rem;
            color: var(--color-text-weak);
            margin: 0;
        }

        /* ===== 相关文章 ===== */
        .related-section {
            margin-bottom: 2.5rem;
        }

        .section-title {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .section-title i {
            color: var(--color-accent);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.25rem;
        }

        .related-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: #cbd5e1;
        }

        .related-card-image {
            width: 100%;
            height: 170px;
            object-fit: cover;
            display: block;
            background: #e8edf5;
        }

        .related-card-body {
            padding: 1.15rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card-body h3 {
            font-size: 1rem;
            font-weight: 600;
            margin: 0 0 0.5rem;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card-body h3 a {
            color: var(--color-text);
            transition: color var(--transition-fast);
        }

        .related-card-body h3 a:hover {
            color: var(--color-primary);
        }

        .related-card-meta {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }

        /* ===== FAQ板块 ===== */
        .faq-section {
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            padding: 2.5rem 2rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            margin-bottom: 2.5rem;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

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

        .faq-item:hover {
            border-color: #cbd5e1;
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 1rem 1.25rem;
            font-size: 0.975rem;
            font-weight: 600;
            color: var(--color-text);
            background: none;
            border: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
        }

        .faq-question i {
            font-size: 0.75rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

        .faq-answer {
            padding: 0 1.25rem 1rem;
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.7;
            display: none;
        }

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

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

        .faq-item.open {
            border-color: #bfdbfe;
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        /* ===== CTA板块 ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a56db 0%, #1e40af 100%);
            border-radius: var(--radius-xl);
            padding: 2.5rem 2rem;
            text-align: center;
            color: #ffffff;
            margin-bottom: 2.5rem;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 140px;
            height: 140px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 0 0 0.75rem;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 1rem;
            opacity: 0.9;
            margin: 0 0 1.5rem;
            position: relative;
            z-index: 1;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 2rem;
            border-radius: 999px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            background: #ffffff;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            position: relative;
            z-index: 1;
        }

        .cta-btn:hover {
            background: #fef3c7;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #ffffff;
            border-top: 1px solid var(--color-border-light);
            padding: 3rem 0 1.5rem;
            margin-top: 1rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }

        .footer-brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 0.5rem;
        }

        .footer-desc {
            font-size: 0.875rem;
            color: var(--color-text-weak);
            line-height: 1.65;
            margin: 0;
        }

        .footer-col-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 0.75rem;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.45rem;
        }

        .footer-links a {
            font-size: 0.875rem;
            color: var(--color-text-weak);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--color-border-light);
            padding-top: 1.25rem;
            text-align: center;
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ===== 文章页特色按钮 ===== */
        .back-to-guide {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1.1rem;
            border-radius: var(--radius-md);
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--color-primary);
            background: #eff6ff;
            border: 1px solid #bfdbfe;
            transition: all var(--transition-fast);
            margin-bottom: 1.5rem;
        }

        .back-to-guide:hover {
            background: #dbeafe;
            border-color: #93c5fd;
        }

        /* ===== 未找到文章 ===== */
        .not-found-block {
            text-align: center;
            padding: 4rem 2rem;
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            margin-bottom: 2.5rem;
        }

        .not-found-block i {
            font-size: 3rem;
            color: var(--color-text-muted);
            margin-bottom: 1rem;
        }

        .not-found-block h2 {
            font-size: 1.4rem;
            font-weight: 700;
            margin: 0 0 0.5rem;
        }

        .not-found-block p {
            color: var(--color-text-weak);
            margin: 0 0 1.25rem;
        }

        .not-found-block .btn-return {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.7rem 1.5rem;
            border-radius: 999px;
            font-weight: 600;
            color: #fff;
            background: var(--color-primary);
            transition: all var(--transition-fast);
        }

        .not-found-block .btn-return:hover {
            background: var(--color-primary-dark);
            box-shadow: var(--shadow-md);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .nav-panel {
                padding: 0.75rem 1rem;
                gap: 0.75rem;
            }

            .article-title {
                font-size: 1.6rem;
            }

            .article-header-section {
                padding: 2rem 1.5rem;
            }

            .article-body {
                padding: 2rem 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }

            .related-grid {
                grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .nav-panel {
                flex-wrap: wrap;
                gap: 0.5rem;
            }

            .nav-links {
                order: 3;
                width: 100%;
                gap: 0.25rem;
                padding-top: 0.5rem;
                border-top: 1px solid var(--color-border-light);
            }

            .nav-cta.desktop-only {
                display: none;
            }

            .mobile-menu-btn {
                display: inline-flex;
                margin-left: auto;
            }

            .nav-links.collapsed {
                display: none;
            }

            .nav-links.expanded {
                display: flex;
            }

            .article-title {
                font-size: 1.4rem;
            }

            .article-header-section {
                padding: 1.5rem 1rem;
            }

            .article-body {
                padding: 1.5rem 1rem;
            }

            .article-content {
                font-size: 1rem;
            }

            .author-card {
                flex-direction: column;
                text-align: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .cta-section {
                padding: 2rem 1.25rem;
            }

            .cta-section h2 {
                font-size: 1.3rem;
            }

            .faq-section {
                padding: 1.5rem 1rem;
            }
        }

        @media (max-width: 520px) {
            .article-title {
                font-size: 1.2rem;
            }

            .article-meta {
                gap: 0.75rem;
                font-size: 0.8rem;
            }

            .article-header-section {
                padding: 1.25rem 0.875rem;
                border-radius: var(--radius-lg);
            }

            .article-body {
                padding: 1.25rem 0.875rem;
                border-radius: var(--radius-lg);
            }

            .article-content h2 {
                font-size: 1.2rem;
            }

            .article-content h3 {
                font-size: 1.05rem;
            }

            .breadcrumb {
                font-size: 0.78rem;
            }

            .related-card-image {
                height: 140px;
            }

            .nav-logo span {
                font-size: 0.95rem;
            }
        }

/* roulang page: category1 */
:root {
            --brand-600: #4F46E5;
            --brand-700: #4338CA;
            --accent-500: #F59E0B;
            --surface: #F8FAFC;
            --card: #FFFFFF;
            --muted: #64748B;
            --deep: #1E293B;
            --border: #E2E8F0;
            --radius-xl: 1rem;
            --radius-2xl: 1.25rem;
            --radius-3xl: 1.5rem;
            --shadow-card: 0 1px 3px 0 rgba(0,0,0,0.04), 0 1px 2px -1px rgba(0,0,0,0.03), 0 4px 16px -8px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 2px 8px 0 rgba(0,0,0,0.06), 0 1px 3px -1px rgba(0,0,0,0.04), 0 8px 24px -10px rgba(0,0,0,0.10);
            --shadow-nav: 0 0 0 1px rgba(0,0,0,0.03), 0 2px 8px rgba(0,0,0,0.04), 0 8px 24px -10px rgba(0,0,0,0.06);
            --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            background-color: #F8FAFC;
            color: #1E293B;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

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

        :focus-visible {
            outline: 2px solid var(--brand-600);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* Container */
        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

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

        /* Navigation Panel - 卡片化设计 */
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.625rem 1rem;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: var(--radius-2xl);
            box-shadow: var(--shadow-nav);
            border: 1px solid rgba(226, 232, 240, 0.6);
            position: relative;
            z-index: 100;
            flex-wrap: wrap;
        }

        @media (max-width: 767px) {
            .nav-panel {
                flex-wrap: wrap;
                gap: 0.5rem;
                padding: 0.5rem 0.75rem;
                border-radius: var(--radius-xl);
            }
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 800;
            font-size: 1.15rem;
            color: #1E293B;
            white-space: nowrap;
            padding: 0.375rem 0.5rem;
            border-radius: 0.75rem;
            transition: background var(--transition-fast), color var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-logo i {
            font-size: 1.35rem;
            color: var(--brand-600);
            transition: transform var(--transition-bounce);
        }

        .nav-logo:hover {
            color: var(--brand-700);
        }

        .nav-logo:hover i {
            transform: rotate(-8deg) scale(1.1);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            flex: 1;
            min-width: 0;
            flex-wrap: wrap;
        }

        @media (max-width: 767px) {
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                order: 10;
                background: white;
                border-radius: var(--radius-xl);
                padding: 0.5rem;
                box-shadow: var(--shadow-card);
                border: 1px solid var(--border);
            }
            .nav-links.show {
                display: flex;
            }
        }

        .nav-link-item {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 0.9rem;
            border-radius: 0.75rem;
            font-weight: 500;
            font-size: 0.9rem;
            color: #475569;
            white-space: nowrap;
            transition: all var(--transition-fast);
            background: transparent;
            position: relative;
        }

        .nav-link-item i {
            font-size: 0.9rem;
            color: #94A3B8;
            transition: color var(--transition-fast);
        }

        .nav-link-item:hover {
            background: #F1F5F9;
            color: #1E293B;
        }

        .nav-link-item:hover i {
            color: #64748B;
        }

        .nav-link-item.active {
            background: #EEF2FF;
            color: var(--brand-700);
            font-weight: 600;
            box-shadow: inset 0 0 0 1px rgba(79, 70, 229, 0.12);
        }

        .nav-link-item.active i {
            color: var(--brand-600);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1.1rem;
            border-radius: 0.85rem;
            font-weight: 600;
            font-size: 0.875rem;
            background: var(--brand-600);
            color: #FFFFFF;
            white-space: nowrap;
            transition: all var(--transition-smooth);
            flex-shrink: 0;
            box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
        }

        .nav-cta:hover {
            background: var(--brand-700);
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 1px 4px rgba(79, 70, 229, 0.2);
        }

        .nav-cta i {
            font-size: 0.85rem;
        }

        @media (max-width: 767px) {
            .desktop-only {
                display: none !important;
            }
        }

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

        .mobile-menu-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 0.75rem;
            background: #F1F5F9;
            color: #475569;
            font-size: 1.2rem;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .mobile-menu-btn:hover {
            background: #E2E8F0;
            color: #1E293B;
        }

        @media (max-width: 767px) {
            .mobile-menu-btn {
                display: flex;
                margin-left: auto;
            }
        }

        /* Page Header / Banner */
        .page-banner {
            position: relative;
            border-radius: var(--radius-2xl);
            overflow: hidden;
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
            min-height: 280px;
            display: flex;
            align-items: center;
            margin-top: 1.5rem;
            box-shadow: var(--shadow-card);
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30, 41, 59, 0.82) 0%, rgba(30, 41, 59, 0.55) 40%, rgba(49, 46, 129, 0.45) 100%);
            z-index: 1;
        }

        .page-banner-content {
            position: relative;
            z-index: 2;
            padding: 2.5rem 2rem;
            max-width: 700px;
        }

        @media (max-width: 640px) {
            .page-banner {
                min-height: 220px;
                border-radius: var(--radius-xl);
            }
            .page-banner-content {
                padding: 1.5rem 1.25rem;
            }
        }

        .page-banner-content .banner-badge {
            display: inline-block;
            padding: 0.3rem 0.85rem;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(8px);
            border-radius: 2rem;
            color: #FFFFFF;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: 0.75rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .page-banner-content h1 {
            font-size: 2.25rem;
            font-weight: 800;
            color: #FFFFFF;
            margin: 0 0 0.5rem 0;
            line-height: 1.25;
            letter-spacing: -0.02em;
        }

        .page-banner-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.9);
            margin: 0;
            line-height: 1.6;
        }

        @media (max-width: 640px) {
            .page-banner-content h1 {
                font-size: 1.6rem;
            }
            .page-banner-content p {
                font-size: 0.9rem;
            }
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 1rem 0;
            font-size: 0.85rem;
            color: #64748B;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: #64748B;
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--brand-600);
        }

        .breadcrumb .separator {
            color: #CBD5E1;
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: #1E293B;
            font-weight: 600;
        }

        /* Section */
        .section {
            padding: 2.5rem 0;
        }

        .section-header {
            margin-bottom: 1.75rem;
        }

        .section-header h2 {
            font-size: 1.65rem;
            font-weight: 700;
            color: #1E293B;
            margin: 0 0 0.35rem 0;
            letter-spacing: -0.01em;
        }

        .section-header p {
            color: #64748B;
            font-size: 0.95rem;
            margin: 0;
        }

        .section-header .section-tag {
            display: inline-block;
            padding: 0.2rem 0.7rem;
            background: #EEF2FF;
            color: var(--brand-600);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 2rem;
            margin-bottom: 0.5rem;
            letter-spacing: 0.02em;
        }

        /* Article Card Grid */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }

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

        @media (max-width: 640px) {
            .article-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
        }

        .article-card {
            background: #FFFFFF;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            border: 1px solid transparent;
        }

        .article-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: #E2E8F0;
        }

        .article-card .card-image-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #F1F5F9;
        }

        .article-card .card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        .article-card .card-image-wrap .card-tag {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            padding: 0.25rem 0.7rem;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(4px);
            border-radius: 2rem;
            font-size: 0.7rem;
            font-weight: 600;
            color: #475569;
            letter-spacing: 0.02em;
            z-index: 2;
        }

        .article-card .card-body {
            padding: 1.1rem 1.15rem 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card .card-body h3 {
            font-size: 1rem;
            font-weight: 700;
            color: #1E293B;
            margin: 0 0 0.4rem 0;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card .card-body h3 a {
            color: inherit;
            transition: color var(--transition-fast);
        }

        .article-card .card-body h3 a:hover {
            color: var(--brand-600);
        }

        .article-card .card-body .card-excerpt {
            font-size: 0.82rem;
            color: #64748B;
            margin: 0 0 0.75rem 0;
            line-height: 1.55;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .article-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.75rem;
            color: #94A3B8;
            padding-top: 0.5rem;
            border-top: 1px solid #F1F5F9;
        }

        .article-card .card-body .card-meta i {
            font-size: 0.7rem;
        }

        /* Featured Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }

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

        @media (max-width: 540px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        .step-card {
            background: #FFFFFF;
            border-radius: var(--radius-xl);
            padding: 1.5rem 1.25rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid transparent;
            transition: all var(--transition-smooth);
            position: relative;
        }

        .step-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: #E2E8F0;
            transform: translateY(-2px);
        }

        .step-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 3rem;
            height: 3rem;
            border-radius: 50%;
            background: #EEF2FF;
            color: var(--brand-600);
            font-weight: 800;
            font-size: 1.2rem;
            margin-bottom: 0.85rem;
            transition: all var(--transition-smooth);
        }

        .step-card:hover .step-number {
            background: var(--brand-600);
            color: #FFFFFF;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
        }

        .step-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #1E293B;
            margin: 0 0 0.35rem 0;
        }

        .step-card p {
            font-size: 0.8rem;
            color: #64748B;
            margin: 0;
            line-height: 1.5;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .faq-item {
            background: #FFFFFF;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid #F1F5F9;
            transition: all var(--transition-smooth);
        }

        .faq-item:hover {
            border-color: #E2E8F0;
        }

        .faq-item summary {
            padding: 1.1rem 1.25rem;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: #1E293B;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            user-select: none;
            transition: background var(--transition-fast);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::marker {
            display: none;
        }

        .faq-item summary:hover {
            background: #F8FAFC;
        }

        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 1.75rem;
            height: 1.75rem;
            border-radius: 50%;
            background: #F1F5F9;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            color: #64748B;
            transition: all var(--transition-smooth);
        }

        .faq-item[open] summary .faq-icon {
            background: #EEF2FF;
            color: var(--brand-600);
            transform: rotate(45deg);
        }

        .faq-item .faq-answer {
            padding: 0 1.25rem 1.1rem;
            font-size: 0.88rem;
            color: #475569;
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #312E81 0%, #4F46E5 40%, #6366F1 100%);
            border-radius: var(--radius-2xl);
            padding: 2.5rem 2rem;
            text-align: center;
            color: #FFFFFF;
            box-shadow: 0 8px 32px rgba(79, 70, 229, 0.25);
        }

        @media (max-width: 640px) {
            .cta-section {
                padding: 1.75rem 1.25rem;
                border-radius: var(--radius-xl);
            }
        }

        .cta-section h3 {
            font-size: 1.55rem;
            font-weight: 800;
            margin: 0 0 0.5rem 0;
            letter-spacing: -0.01em;
        }

        .cta-section p {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 1.5rem 0;
            max-width: 550px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            background: #FFFFFF;
            color: var(--brand-700);
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: 0.85rem;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
        }

        .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
            background: #F8FAFC;
        }

        .cta-btn:active {
            transform: translateY(0);
        }

        /* Footer */
        .site-footer {
            background: #FFFFFF;
            border-top: 1px solid #E2E8F0;
            padding: 2.5rem 0 1.5rem;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #F1F5F9;
        }

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

        @media (max-width: 540px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.25rem;
            }
        }

        .footer-brand-name {
            font-weight: 800;
            font-size: 1.1rem;
            color: #1E293B;
            margin-bottom: 0.5rem;
        }

        .footer-desc {
            font-size: 0.85rem;
            color: #64748B;
            line-height: 1.6;
            margin: 0;
        }

        .footer-col-title {
            font-weight: 700;
            font-size: 0.85rem;
            color: #1E293B;
            margin-bottom: 0.6rem;
            letter-spacing: 0.02em;
            text-transform: uppercase;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }

        .footer-links a {
            font-size: 0.85rem;
            color: #64748B;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--brand-600);
        }

        .footer-bottom {
            padding-top: 1.25rem;
            text-align: center;
            font-size: 0.78rem;
            color: #94A3B8;
        }

        .footer-bottom p {
            margin: 0;
        }

        /* Utility */
        .text-center { text-align: center; }
        .mt-0 { margin-top: 0; }
        .mt-1 { margin-top: 0.5rem; }
        .mt-2 { margin-top: 1rem; }
        .mb-0 { margin-bottom: 0; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: transparent;
        }
        ::-webkit-scrollbar-thumb {
            background: #CBD5E1;
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #94A3B8;
        }