:root {
            --primary: #4f46e5;
            --primary-hover: #4338ca;
            --secondary: #ec4899;
            --accent: #f59e0b;
            --dark: #0f172a;
            --light: #f8fafc;
            --gray: #64748b;
            --border: #e2e8f0;
            --card-bg: #ffffff;
            --grad-rainbow: linear-gradient(135deg, #2563eb, #8b5cf6, #d946ef, #ff007f);
            --grad-soft: linear-gradient(135deg, #f0fdf4, #ecfdf5);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo-container {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ai-page-logo {
            max-height: 40px;
            width: auto;
        }

        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            background: var(--grad-rainbow);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 20px;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
        }

        .nav-menu a:hover {
            color: var(--secondary);
        }

        .nav-btn {
            display: inline-block;
            background: var(--grad-rainbow);
            color: #ffffff !important;
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: transform 0.2s, box-shadow 0.2s;
            box-shadow: 0 4px 15px rgba(236, 72, 153, 0.3);
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(236, 72, 153, 0.5);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            border-radius: 2px;
            transition: 0.3s;
        }

        /* Hero首屏 (纯CSS，无图片) */
        .hero {
            padding: 160px 0 80px 0;
            background: radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
                        var(--light);
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(236, 72, 153, 0.1);
            color: var(--secondary);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 25px;
            border: 1px solid rgba(236, 72, 153, 0.2);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--dark);
            margin-bottom: 20px;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: var(--gray);
            max-width: 800px;
            margin: 0 auto 35px auto;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 700;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--grad-rainbow);
            color: #ffffff;
            box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 25px rgba(99, 102, 241, 0.5);
        }

        .btn-outline {
            background: #ffffff;
            color: var(--dark);
            border: 2px solid var(--border);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* 核心特色网格 */
        .hero-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }

        .hero-card {
            background: var(--card-bg);
            padding: 30px;
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            border: 1px solid var(--border);
            text-align: left;
            transition: all 0.3s;
        }

        .hero-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.1);
            border-color: var(--primary);
        }

        .hero-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(79, 70, 229, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .hero-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .hero-card p {
            color: var(--gray);
            font-size: 0.9rem;
        }

        /* 通用区块样式 */
        section {
            padding: 100px 0;
            border-bottom: 1px solid var(--border);
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-header p {
            color: var(--gray);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 关于我们 & 数据指标 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .about-text p {
            color: var(--gray);
            margin-bottom: 25px;
            font-size: 1rem;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .metric-card {
            background: var(--grad-soft);
            padding: 25px;
            border-radius: 12px;
            text-align: center;
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        .metric-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .metric-label {
            font-size: 0.9rem;
            color: var(--dark);
            font-weight: 600;
        }

        /* 全平台AIGC服务与模型聚合 */
        .models-container {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 4px 30px rgba(0,0,0,0.02);
            border: 1px solid var(--border);
        }

        .model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-bottom: 40px;
        }

        .model-tag {
            background: var(--light);
            border: 1px solid var(--border);
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--dark);
            transition: all 0.3s;
        }

        .model-tag:hover {
            background: var(--grad-rainbow);
            color: white;
            border-color: transparent;
            transform: translateY(-2px);
        }

        .service-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: var(--light);
            border-radius: 16px;
            padding: 30px;
            border: 1px solid var(--border);
            transition: all 0.3s;
        }

        .service-card:hover {
            background: #ffffff;
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(99, 102, 241, 0.08);
            border-color: var(--primary);
        }

        .service-card h4 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .service-card p {
            color: var(--gray);
            font-size: 0.9rem;
            margin-bottom: 15px;
        }

        .service-features {
            list-style: none;
            padding-left: 0;
        }

        .service-features li {
            font-size: 0.85rem;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--dark);
        }

        .service-features li::before {
            content: "✓";
            color: var(--secondary);
            font-weight: bold;
        }

        /* 一站式AIGC制作与媒体展示 */
        .media-showcase-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .media-content {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .media-img-container {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            border: 1px solid var(--border);
        }

        .media-img-container img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
        }

        /* 解决方案与流程 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .solution-card {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 30px;
            border: 1px solid var(--border);
            transition: all 0.3s;
        }

        .solution-card:hover {
            border-color: var(--secondary);
            box-shadow: 0 10px 30px rgba(236, 72, 153, 0.08);
        }

        .solution-icon {
            font-size: 2rem;
            margin-bottom: 20px;
        }

        /* 标准化流程 & 技术标准时间线 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding: 40px 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border);
            transform: translateX(-50%);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 40px;
            width: 50%;
            padding: 0 40px;
        }

        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }

        .timeline-badge {
            position: absolute;
            top: 0;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--grad-rainbow);
            border: 4px solid var(--card-bg);
            z-index: 1;
        }

        .timeline-item:nth-child(odd) .timeline-badge {
            right: -10px;
        }

        .timeline-item:nth-child(even) .timeline-badge {
            left: -10px;
        }

        .timeline-panel {
            background: var(--card-bg);
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        }

        .timeline-panel h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .timeline-panel p {
            font-size: 0.9rem;
            color: var(--gray);
        }

        /* 对比评测板块 */
        .comparison-card {
            background: var(--card-bg);
            border-radius: 20px;
            border: 1px solid var(--border);
            padding: 40px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.02);
        }

        .score-display {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 30px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .score-circle {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: var(--grad-rainbow);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: white;
        }

        .score-num {
            font-size: 2.2rem;
            font-weight: 900;
            line-height: 1;
        }

        .score-label {
            font-size: 0.75rem;
            font-weight: 600;
            opacity: 0.9;
        }

        .score-stars {
            font-size: 1.5rem;
            color: var(--accent);
            margin-bottom: 8px;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--border);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        th, td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border);
        }

        th {
            background: var(--light);
            font-weight: 700;
            color: var(--dark);
        }

        tr:last-child td {
            border-bottom: none;
        }

        .highlight-col {
            background: rgba(79, 70, 229, 0.02);
            font-weight: 600;
            color: var(--primary);
        }

        /* 职业与人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .training-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            transition: all 0.3s;
        }

        .training-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .training-icon {
            font-size: 2rem;
            margin-bottom: 15px;
        }

        .training-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .training-card p {
            font-size: 0.85rem;
            color: var(--gray);
        }

        /* 客户案例与图片展示 */
        .case-gallery {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            align-items: center;
        }

        .case-images {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .case-img-wrap {
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: 0 4px 15px rgba(0,0,0,0.03);
        }

        .case-img-wrap img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 用户评论 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .review-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.01);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-size: 0.95rem;
            color: var(--dark);
            margin-bottom: 20px;
            font-style: italic;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 15px;
            border-top: 1px solid var(--border);
            padding-top: 15px;
        }

        .user-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--grad-rainbow);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .user-info h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--dark);
        }

        .user-info span {
            font-size: 0.8rem;
            color: var(--gray);
        }

        /* FAQ折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-question {
            padding: 20px 24px;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary);
            transition: transform 0.3s;
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: var(--light);
        }

        .faq-answer-inner {
            padding: 20px 24px;
            font-size: 0.95rem;
            color: var(--gray);
            border-top: 1px solid var(--border);
        }

        /* AI术语与自助排查 */
        .glossary-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }

        .glossary-card {
            background: var(--card-bg);
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--border);
        }

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

        .glossary-card p {
            font-size: 0.85rem;
            color: var(--gray);
        }

        /* 知识库/文章列表 */
        .articles-container {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 40px;
        }

        .articles-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .article-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            transition: all 0.3s;
        }

        .article-card:hover {
            border-color: var(--primary);
            transform: translateX(5px);
        }

        .article-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
        }

        .article-card a {
            color: var(--primary);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 600;
            align-self: flex-start;
        }

        .article-banners {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .banner-img-wrap {
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .banner-img-wrap img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 表单与联系我们 */
        .contact-section-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
            align-items: start;
        }

        .form-container {
            background: var(--card-bg);
            padding: 40px;
            border-radius: 20px;
            border: 1px solid var(--border);
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            font-weight: 600;
            margin-bottom: 8px;
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: 8px;
            background: var(--light);
            font-size: 0.95rem;
            color: var(--dark);
            transition: border-color 0.3s;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background: #ffffff;
        }

        select.form-control {
            appearance: none;
            background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            background-size: 16px;
        }

        .contact-info-panel {
            background: var(--card-bg);
            border: 1px solid var(--border);
            padding: 40px;
            border-radius: 20px;
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .contact-info-item {
            display: flex;
            gap: 15px;
        }

        .contact-icon {
            font-size: 1.5rem;
            color: var(--secondary);
        }

        .contact-details h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 5px;
        }

        .contact-details p, .contact-details a {
            font-size: 0.9rem;
            color: var(--gray);
            text-decoration: none;
        }

        .qrcode-container {
            display: flex;
            gap: 20px;
            margin-top: 10px;
            flex-wrap: wrap;
        }

        .qrcode-box {
            text-align: center;
            flex: 1;
            min-width: 120px;
        }

        .qrcode-box img {
            width: 100%;
            max-width: 120px;
            height: auto;
            border-radius: 8px;
            border: 1px solid var(--border);
            margin-bottom: 8px;
        }

        .qrcode-box span {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--dark);
        }

        /* 悬浮客服 */
        .floating-contact {
            position: fixed;
            bottom: 40px;
            right: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 54px;
            height: 54px;
            border-radius: 50%;
            background: var(--grad-rainbow);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            cursor: pointer;
            transition: all 0.3s;
            text-decoration: none;
            position: relative;
        }

        .float-btn:hover {
            transform: translateY(-5px) scale(1.05);
        }

        .float-btn span {
            font-size: 1.2rem;
            font-weight: 700;
        }

        .qr-popover {
            position: absolute;
            bottom: 65px;
            right: 0;
            background: white;
            border: 1px solid var(--border);
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            display: none;
            text-align: center;
            width: 160px;
        }

        .qr-popover img {
            width: 100%;
            height: auto;
            border-radius: 6px;
            margin-bottom: 8px;
        }

        .qr-popover p {
            font-size: 0.75rem;
            color: var(--dark);
            font-weight: 600;
            margin: 0;
        }

        .float-btn:hover .qr-popover {
            display: block;
        }

        /* 页脚 */
        footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.5fr;
            gap: 50px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            color: #ffffff;
            font-weight: 800;
            margin-bottom: 15px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .footer-links h4, .footer-contact h4 {
            color: #ffffff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .footer-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            font-size: 0.85rem;
            transition: color 0.3s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.85rem;
        }

        .footer-bottom-links {
            display: flex;
            gap: 15px;
        }

        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 15px;
        }

        .friend-links a {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
            background: rgba(255, 255, 255, 0.05);
            padding: 4px 8px;
            border-radius: 4px;
            transition: background 0.3s, color 0.3s;
        }

        .friend-links a:hover {
            background: var(--primary);
            color: #ffffff;
        }

        /* 移动端响应式样式 */
        @media (max-width: 992px) {
            .about-grid, .media-showcase-grid, .case-gallery, .articles-container, .contact-section-grid, .footer-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 50px;
                padding-right: 0;
                text-align: left !important;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
            .timeline-item:nth-child(odd) .timeline-badge,
            .timeline-item:nth-child(even) .timeline-badge {
                left: 10px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero {
                padding: 120px 0 60px 0;
            }
            .hero-btns {
                flex-direction: column;
            }
            .btn {
                width: 100%;
            }
        }