:root {
            --bg-gradient: linear-gradient(135deg, #fff5f5 0%, #f0f3ff 50%, #fbf0ff 100%);
            --primary: #ff6b8b; /* 糖果粉 */
            --secondary: #54a0ff; /* 马卡龙蓝 */
            --accent: #ff9f43; /* 活力橙 */
            --purple: #9b5de5; /* 梦幻紫 */
            --dark: #2d3436; /* 深灰正文 */
            --light: #ffffff;
            --gray: #f8f9fa;
            --border-radius-lg: 24px;
            --border-radius-md: 16px;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        /* 基础重置 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--dark);
            background: var(--light);
        }

        body {
            background: var(--bg-gradient);
            background-attachment: fixed;
            min-height: 100vh;
            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: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 2px solid rgba(255, 255, 255, 0.5);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
            transition: var(--transition);
        }

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

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

        .ai-page-logo {
            height: 40px;
            object-fit: contain;
        }

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

        .nav-menu a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition);
            padding: 8px 12px;
            border-radius: 20px;
        }

        .nav-menu a:hover {
            color: var(--primary);
            background: rgba(255, 107, 139, 0.1);
        }

        .ai-page-home-link {
            color: var(--primary) !important;
            font-weight: bold !important;
            border: 2px solid var(--primary);
        }

        .nav-btn {
            background: linear-gradient(135deg, var(--primary), var(--purple));
            color: #fff !important;
            padding: 8px 20px !important;
            border-radius: 30px !important;
            box-shadow: 0 4px 15px rgba(255, 107, 139, 0.3);
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 107, 139, 0.4);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--dark);
        }

        /* 英雄首屏 (无图片) */
        .hero-section {
            padding: 100px 0 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        /* 炫酷糖果色背景圆圈装饰 - CSS实现 */
        .hero-section::before, .hero-section::after {
            content: '';
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            z-index: -1;
            opacity: 0.6;
        }

        .hero-section::before {
            width: 300px;
            height: 300px;
            background: #ffb8b8;
            top: -50px;
            left: -50px;
            animation: float-ball 8s ease-in-out infinite alternate;
        }

        .hero-section::after {
            width: 400px;
            height: 400px;
            background: #c3daff;
            bottom: -50px;
            right: -50px;
            animation: float-ball 12s ease-in-out infinite alternate-reverse;
        }

        @keyframes float-ball {
            0% { transform: translate(0, 0) scale(1); }
            100% { transform: translate(30px, 20px) scale(1.1); }
        }

        .hero-tag {
            display: inline-block;
            background: linear-gradient(135deg, rgba(255,107,139,0.1), rgba(155,93,229,0.1));
            color: var(--purple);
            font-weight: 600;
            padding: 8px 24px;
            border-radius: 30px;
            margin-bottom: 24px;
            border: 1px solid rgba(255, 107, 139, 0.2);
            font-size: 14px;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 24px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--purple) 50%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: break-all;
        }

        .hero-subtitle {
            font-size: 18px;
            color: #636e72;
            max-width: 800px;
            margin: 0 auto 40px;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 50px;
        }

        .btn-main {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            font-weight: bold;
            font-size: 18px;
            padding: 16px 40px;
            border-radius: 50px;
            text-decoration: none;
            box-shadow: 0 10px 25px rgba(255, 107, 139, 0.4);
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }

        .btn-main:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 30px rgba(255, 107, 139, 0.5);
        }

        .btn-sub {
            background: white;
            color: var(--purple);
            font-weight: bold;
            font-size: 18px;
            padding: 16px 40px;
            border-radius: 50px;
            text-decoration: none;
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
            transition: var(--transition);
            border: 2px solid var(--purple);
        }

        .btn-sub:hover {
            background: rgba(155, 93, 229, 0.05);
            transform: translateY(-3px);
        }

        /* 核心特性标签云 */
        .hero-features {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
            max-width: 900px;
            margin: 0 auto;
        }

        .feature-badge {
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid rgba(255,255,255,0.8);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .feature-badge::before {
            content: '✦';
            color: var(--accent);
        }

        /* 全局通用 Section */
        section {
            padding: 80px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 32px;
            color: var(--dark);
            margin-bottom: 15px;
            font-weight: 700;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 10px;
        }

        .section-header p {
            color: #636e72;
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 卡片风格 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .card {
            background: rgba(255, 255, 255, 0.8);
            border: 2px solid #ffffff;
            border-radius: var(--border-radius-lg);
            padding: 30px;
            box-shadow: 0 10px 30px rgba(155, 93, 229, 0.05);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 6px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }

        .card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(155, 93, 229, 0.1);
            background: #ffffff;
        }

        .card:hover::before {
            opacity: 1;
        }

        .card-icon {
            width: 60px;
            height: 60px;
            border-radius: var(--border-radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin-bottom: 20px;
            box-shadow: inset 0 -4px 10px rgba(0,0,0,0.05);
        }

        .card h3 {
            font-size: 20px;
            margin-bottom: 12px;
            font-weight: 600;
        }

        .card p {
            color: #636e72;
            font-size: 14px;
            line-height: 1.6;
        }

        /* 颜色类 */
        .bg-pink { background: #ffe9ec; color: var(--primary); }
        .bg-blue { background: #e3efff; color: var(--secondary); }
        .bg-orange { background: #ffeeda; color: var(--accent); }
        .bg-purple { background: #f3e8ff; color: var(--purple); }

        /* 关于我们 & 平台介绍 */
        .about-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .about-content {
            background: rgba(255, 255, 255, 0.7);
            padding: 40px;
            border-radius: var(--border-radius-lg);
            border: 2px solid white;
        }

        .about-content h3 {
            font-size: 24px;
            margin-bottom: 20px;
            color: var(--purple);
        }

        .about-text {
            font-size: 15px;
            color: #2d3436;
            margin-bottom: 24px;
        }

        .about-list {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .about-list li {
            position: relative;
            padding-left: 24px;
            font-size: 14px;
            font-weight: 500;
        }

        .about-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--secondary);
            font-weight: bold;
        }

        .about-visual {
            background: linear-gradient(135deg, var(--secondary), var(--purple));
            color: white;
            border-radius: var(--border-radius-lg);
            padding: 45px 30px;
            text-align: center;
            box-shadow: 0 15px 30px rgba(84, 160, 255, 0.3);
        }

        .about-visual .num {
            font-size: 64px;
            font-weight: 800;
            line-height: 1;
            margin-bottom: 10px;
        }

        /* AIGC 服务平台展示 */
        .platform-logos {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 15px;
            margin-top: 30px;
        }

        .logo-tag {
            background: #ffffff;
            border: 1px solid rgba(0,0,0,0.05);
            padding: 10px 15px;
            border-radius: 12px;
            text-align: center;
            font-size: 12px;
            font-weight: bold;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .logo-tag:hover {
            transform: scale(1.05);
            background: var(--primary);
            color: white;
            box-shadow: 0 6px 15px rgba(255, 107, 139, 0.2);
        }

        /* 全行业解决方案 (带指定横版与方版素材图) */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .solution-card {
            background: rgba(255,255,255,0.8);
            border-radius: var(--border-radius-lg);
            overflow: hidden;
            border: 2px solid white;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            display: flex;
            flex-direction: column;
        }

        .solution-img-container {
            width: 100%;
            height: 240px;
            overflow: hidden;
            background: #eaeaea;
        }

        .solution-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .solution-card:hover .solution-img-container img {
            transform: scale(1.05);
        }

        .solution-info {
            padding: 30px;
        }

        /* 流程步骤 */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            background: rgba(255,255,255,0.9);
            border-radius: var(--border-radius-md);
            padding: 25px;
            text-align: center;
            position: relative;
            border: 1px solid white;
            box-shadow: 0 8px 25px rgba(0,0,0,0.03);
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            margin: 0 auto 15px;
        }

        /* 对比评测表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: white;
            border-radius: var(--border-radius-lg);
            border: 2px solid #ffffff;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        }

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

        .compare-table th, .compare-table td {
            padding: 20px 15px;
            border-bottom: 1px solid #f1f2f6;
        }

        .compare-table th {
            background: #fafbff;
            font-weight: 700;
            color: var(--dark);
        }

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

        .compare-table td.highlight {
            background: rgba(255,107,139,0.03);
            font-weight: 600;
            color: var(--primary);
        }

        .rating-badge {
            background: #fff0f2;
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 20px;
            font-weight: 800;
            display: inline-block;
        }

        /* Token 比价工具 */
        .token-calc-card {
            background: rgba(255, 255, 255, 0.9);
            border-radius: var(--border-radius-lg);
            padding: 40px;
            border: 2px solid white;
            box-shadow: 0 15px 35px rgba(0,0,0,0.04);
            max-width: 800px;
            margin: 0 auto;
        }

        .token-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 15px;
            margin-top: 25px;
        }

        .token-item {
            background: #ffffff;
            border: 1px solid #e1e8ed;
            border-radius: 12px;
            padding: 15px;
            text-align: center;
        }

        .token-item.cheapest {
            border: 2px solid var(--accent);
            background: #fffdf9;
            position: relative;
        }

        .token-item.cheapest::after {
            content: '推荐';
            position: absolute;
            top: -10px;
            right: 10px;
            background: var(--accent);
            color: white;
            font-size: 10px;
            padding: 2px 8px;
            border-radius: 10px;
            font-weight: bold;
        }

        /* 案例展示 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .case-card {
            border-radius: var(--border-radius-md);
            overflow: hidden;
            background: white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            border: 1px solid rgba(0,0,0,0.05);
        }

        .case-img-wrap {
            height: 180px;
            overflow: hidden;
        }

        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-card:hover .case-img-wrap img {
            transform: scale(1.05);
        }

        .case-info {
            padding: 15px;
        }

        .case-info h4 {
            font-size: 16px;
            margin-bottom: 5px;
            color: var(--dark);
        }

        .case-info p {
            font-size: 12px;
            color: #7f8c8d;
        }

        /* 职业培训 & 证书 */
        .train-badge-group {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            justify-content: center;
            margin-top: 30px;
        }

        .train-badge {
            background: linear-gradient(135deg, #ffffff 0%, #f6f8ff 100%);
            border: 2px solid white;
            border-radius: 15px;
            padding: 15px 25px;
            display: flex;
            align-items: center;
            gap: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.02);
            font-weight: 600;
        }

        .train-badge::before {
            content: '🎓';
            font-size: 20px;
        }

        /* 服务网络 */
        .network-map {
            background: rgba(255,255,255,0.7);
            border-radius: var(--border-radius-lg);
            padding: 40px;
            border: 2px solid white;
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .network-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .network-node {
            background: white;
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
        }

        .network-node h4 {
            color: var(--purple);
            margin-bottom: 5px;
        }

        /* 用户评论 */
        .comment-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .comment-card {
            background: white;
            border-radius: var(--border-radius-md);
            padding: 30px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.02);
            border: 1px solid rgba(0,0,0,0.05);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .comment-text {
            font-style: italic;
            color: #555;
            margin-bottom: 20px;
            font-size: 14px;
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        .user-info h4 {
            font-size: 15px;
            margin-bottom: 2px;
        }

        .user-info p {
            font-size: 12px;
            color: #7f8c8d;
        }

        /* FAQ 手风琴 */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: white;
            margin-bottom: 12px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            border: 1px solid rgba(0,0,0,0.05);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            padding: 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: #fafbff;
        }

        .faq-answer-inner {
            padding: 20px;
            color: #636e72;
            font-size: 14px;
            border-top: 1px solid #f1f2f6;
        }

        .faq-icon::after {
            content: '+';
            font-size: 20px;
            color: var(--purple);
            font-weight: bold;
        }

        .faq-item.active .faq-icon::after {
            content: '-';
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
        }

        /* 资讯 & 知识库 */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .article-card {
            background: white;
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.02);
            border: 1px solid rgba(0,0,0,0.05);
        }

        .article-card h4 {
            font-size: 16px;
            margin-bottom: 10px;
        }

        .article-card a {
            color: var(--purple);
            text-decoration: none;
            font-size: 13px;
            font-weight: 600;
            display: inline-block;
            margin-top: 10px;
        }

        .article-card a:hover {
            text-decoration: underline;
        }

        /* 表单与加盟 */
        .form-section {
            background: linear-gradient(135deg, #fbf0ff 0%, #e3efff 100%);
            border-radius: var(--border-radius-lg);
            padding: 50px;
            border: 2px solid white;
            max-width: 900px;
            margin: 0 auto;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .form-wrapper form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .form-group input, .form-group select, .form-group textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid rgba(0,0,0,0.1);
            border-radius: 8px;
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }

        .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 8px rgba(255,107,139,0.2);
        }

        .form-btn {
            background: linear-gradient(135deg, var(--primary), var(--purple));
            color: white;
            border: none;
            padding: 14px;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
        }

        .form-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(255, 107, 139, 0.3);
        }

        .contact-channel {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 15px;
            background: white;
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
        }

        .contact-qr {
            width: 80px;
            height: 80px;
            border-radius: 8px;
            overflow: hidden;
        }

        .contact-qr img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 侧边悬浮窗口 */
        .floating-action {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background: white;
            border-radius: 50%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: var(--transition);
            text-decoration: none;
            color: var(--dark);
        }

        .float-btn:hover {
            transform: translateY(-3px);
            background: var(--primary);
            color: white;
        }

        .float-qr-pop {
            display: none;
            position: absolute;
            bottom: 60px;
            right: 0;
            background: white;
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            width: 150px;
            text-align: center;
            border: 1px solid #eee;
        }

        .float-qr-pop img {
            width: 100%;
            height: auto;
            border-radius: 6px;
        }

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

        /* 术语百科标签 */
        .wiki-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .wiki-tag {
            background: #ffffff;
            border: 1px solid rgba(0,0,0,0.05);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 13px;
            color: #555;
        }

        /* 页脚设计 */
        footer {
            background: var(--dark);
            color: #d1d8e0;
            padding: 60px 0 30px;
            margin-top: 80px;
            border-top: 3px solid var(--primary);
        }

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

        .footer-brand h3 {
            color: white;
            font-size: 22px;
            margin-bottom: 15px;
        }

        .footer-links h4, .footer-contact h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 16px;
            position: relative;
        }

        .footer-links ul {
            list-style: none;
        }

        .footer-links ul li {
            margin-bottom: 10px;
        }

        .footer-links ul li a {
            color: #a5b1c2;
            text-decoration: none;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
        }

        .friend-links {
            margin-bottom: 15px;
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friend-links a {
            color: #a5b1c2;
            text-decoration: none;
            font-size: 13px;
        }

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

        /* 移动端响应式 */
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                padding: 20px;
                border-bottom: 2px solid var(--primary);
            }

            .nav-menu.active {
                display: flex;
            }

            .menu-toggle {
                display: block;
            }

            .hero-title {
                font-size: 32px;
            }

            .about-grid, .solutions-grid, .steps-container, .network-grid, .comment-grid, .articles-list, .form-grid, .footer-grid {
                grid-template-columns: 1fr;
            }

            .platform-logos {
                grid-template-columns: repeat(3, 1fr);
            }

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