:root {
            --bg-color: #f8fafc;
            --text-color: #1e293b;
            --text-secondary: #64748b;
            --card-bg: #ffffff;
            --primary-color: #3b82f6;
            --primary-hover: #2563eb;
            --border-color: #e2e8f0;
            --sidebar-bg: #ffffff;
            --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --tag-success-bg: #dcfce7;
            --tag-success-text: #166534;
            --section-padding: 5rem 2rem;
            --enterprise-color: #8b5cf6;
        }
        [data-theme="dark"] {
            --bg-color: #0f172a;
            --text-color: #f1f5f9;
            --text-secondary: #94a3b8;
            --card-bg: #1e293b;
            --primary-color: #60a5fa;
            --primary-hover: #3b82f6;
            --border-color: #334155;
            --sidebar-bg: #1e293b;
            --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
            --tag-success-bg: #064e3b;
            --tag-success-text: #6ee7b7;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; transition: background-color 0.3s, color 0.3s, border-color 0.3s; }
        body { font-family: 'Inter', 'Segoe UI', sans-serif; background-color: var(--bg-color); color: var(--text-color); line-height: 1.6; }

        /* ========== 主题切换按钮 ========== */
        .theme-toggle {
            position: fixed;
            top: 24px;
            right: 24px;
            z-index: 100;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            border: 1px solid var(--border);
            background: var(--bg-card);
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .theme-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: rotate(30deg);
        }
        .theme-toggle:active {
            transform: scale(0.9) rotate(30deg);
        }
        .theme-toggle .icon-sun,
        .theme-toggle .icon-moon {
            position: absolute;
            transition: all 0.3s ease;
        }
        [data-theme="dark"] .theme-toggle .icon-sun { opacity: 1; transform: scale(1); }
        [data-theme="dark"] .theme-toggle .icon-moon { opacity: 0; transform: scale(0) rotate(-90deg); }
        [data-theme="light"] .theme-toggle .icon-sun { opacity: 0; transform: scale(0) rotate(90deg); }
        [data-theme="light"] .theme-toggle .icon-moon { opacity: 1; transform: scale(1); }

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

 /* 导航栏 */
        .navbar { display: flex; justify-content: space-between; align-items: center; padding: 1rem 2rem; background-color: rgba(255, 255, 255, 0.8); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 1000; }
        [data-theme="dark"] .navbar { background-color: rgba(15, 23, 42, 0.8); }
        .logo { font-size: 1.5rem; font-weight: 800; color: var(--primary-color); display: flex; align-items: center; gap: 8px; }
        .nav-links a { text-decoration: none; color: var(--text-secondary); margin: 0 0.8rem; font-weight: 500; font-size: 0.95rem; }
        .nav-links a:hover, .nav-links a.active { color: var(--primary-color); }
        .nav-actions { display: flex; align-items: center; gap: 1rem; }

        /* 按钮 */
        .btn { padding: 0.6rem 1.2rem; border-radius: 8px; border: none; cursor: pointer; font-weight: 600; font-size: 0.9rem; transition: all 0.2s; }
        .btn-primary { background-color: var(--primary-color); color: white; box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3); }
        .btn-primary:hover { background-color: var(--primary-hover); transform: translateY(-1px); }
        .btn-enterprise { background-color: var(--enterprise-color); color: white; box-shadow: 0 4px 6px -1px rgba(139, 92, 246, 0.3); }
        .btn-enterprise:hover { background-color: #7c3aed; transform: translateY(-1px); }
        .btn-outline { background-color: transparent; border: 1px solid var(--border-color); color: var(--text-color); }
        .btn-outline:hover { border-color: var(--primary-color); color: var(--primary-color); background-color: rgba(59, 130, 246, 0.05); }
        .btn-lg { padding: 0.8rem 1.8rem; font-size: 1rem; }
        .icon-btn { background: none; border: none; color: var(--text-color); font-size: 1.2rem; cursor: pointer; padding: 5px; }

        /* 通用 Section 样式 */
        section { padding: var(--section-padding); max-width: 1200px; margin: 0 auto; }
        .section-header { text-align: center; margin-bottom: 3rem; }
        .section-header h2 { font-size: 2.5rem; margin-bottom: 0.5rem; background: linear-gradient(to right, var(--primary-color), #8b5cf6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .section-header p { color: var(--text-secondary); font-size: 1.1rem; }

        /* Hero */
        .hero { display: flex; align-items: center; justify-content: space-between; padding-top: 6rem; padding-bottom: 4rem; gap: 2rem; }
        .hero-content { flex: 1; }
        .badge { display: inline-block; background: rgba(59, 130, 246, 0.1); color: var(--primary-color); padding: 4px 12px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: 1rem; }
        .badge-enterprise { background: rgba(139, 92, 246, 0.1); color: var(--enterprise-color); }
        .hero h1 { font-size: 3.5rem; line-height: 1.1; margin-bottom: 1.5rem; font-weight: 800; }
        .highlight { color: var(--primary-color); }
        .hero p { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 2rem; max-width: 600px; }
        .hero-buttons { display: flex; gap: 1rem; margin-bottom: 3rem; flex-wrap: wrap; }
        .stats { display: flex; gap: 3rem; border-top: 1px solid var(--border-color); padding-top: 2rem; }
        .stats div strong { font-size: 1.5rem; display: block; color: var(--text-color); }
        .stats div span { font-size: 0.9rem; color: var(--text-secondary); }

        /* Mockup */
        .mockup-window { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; box-shadow: var(--shadow); width: 100%; max-width: 550px; overflow: hidden; transform: perspective(1000px) rotateY(-5deg); transition: transform 0.5s; }
        .mockup-window:hover { transform: perspective(1000px) rotateY(0deg); }
        .mockup-header { background: var(--bg-color); padding: 12px 16px; display: flex; gap: 8px; border-bottom: 1px solid var(--border-color); }
        .dot { width: 12px; height: 12px; border-radius: 50%; }
        .red { background: #ef4444; }
        .yellow { background: #f59e0b; }
        .green { background: #10b981; }
        .mockup-body { display: flex; height: 350px; }
        .mockup-sidebar { width: 80px; background: var(--bg-color); padding: 15px; display: flex; flex-direction: column; gap: 15px; border-right: 1px solid var(--border-color); }
        .avatar-item { width: 50px; height: 50px; border-radius: 50%; background: linear-gradient(135deg, #3b82f6, #06b6d4); color: white; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; font-weight: bold; position: relative; cursor: pointer; }
        .avatar-item.active { box-shadow: 0 0 0 3px var(--primary-color); }
        .mockup-chat { flex: 1; padding: 20px; display: flex; flex-direction: column; gap: 15px; }
        .msg { padding: 12px 16px; border-radius: 12px; max-width: 85%; font-size: 0.9rem; line-height: 1.4; }
        .msg.bot { background: var(--bg-color); align-self: flex-start; border-bottom-left-radius: 2px; }
        .msg.user { background: var(--primary-color); color: white; align-self: flex-end; border-bottom-right-radius: 2px; }

        /* 下载区域 */
        .download-section { background: linear-gradient(180deg, rgba(59, 130, 246, 0.05) 0%, var(--bg-color) 100%); }
        .download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
        .download-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 2rem; text-align: center; transition: all 0.3s; }
        .download-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--primary-color); }
        .download-card .os-icon { font-size: 3rem; color: var(--primary-color); margin-bottom: 1rem; }
        .download-card h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }
        .download-card .version { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 1rem; }
        .download-card .btn { width: 100%; margin-top: 1rem; }
        .download-card.coming-soon { opacity: 0.7; }
        .download-card.coming-soon .btn { background: var(--text-secondary); cursor: not-allowed; }
        .coming-soon-badge { display: inline-block; background: rgba(245, 158, 11, 0.1); color: #f59e0b; padding: 2px 8px; border-radius: 12px; font-size: 0.75rem; font-weight: 600; margin-left: 0.5rem; }

        /* 版本对比 */
        .pricing-section { background: var(--card-bg); border-radius: 24px; margin: 2rem auto; border: 1px solid var(--border-color); }
        .pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; max-width: 900px; margin: 0 auto; }
        .pricing-card { background: var(--bg-color); border: 1px solid var(--border-color); border-radius: 16px; padding: 2.5rem; position: relative; transition: all 0.3s; }
        .pricing-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
        .pricing-card.featured { border-color: var(--enterprise-color); box-shadow: 0 0 0 2px var(--enterprise-color); }
        .pricing-card.featured::before { content: '推荐'; position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--enterprise-color); color: white; padding: 4px 16px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; }
        .pricing-card h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
        .pricing-card .price { font-size: 2.5rem; font-weight: 800; margin: 1rem 0; }
        .pricing-card .price span { font-size: 1rem; font-weight: 400; color: var(--text-secondary); }
        .pricing-card .desc { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1.5rem; }
        .pricing-features { list-style: none; margin-bottom: 2rem; }
        .pricing-features li { padding: 0.5rem 0; display: flex; align-items: center; gap: 10px; font-size: 0.95rem; }
        .pricing-features li i { color: var(--primary-color); width: 20px; }
        .pricing-features li.disabled { color: var(--text-secondary); opacity: 0.5; }
        .pricing-features li.disabled i { color: var(--text-secondary); }
        .pricing-card .btn { width: 100%; }

        /* Models Grid */
        .models-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
        .model-card { background: var(--card-bg); padding: 1.5rem; border-radius: 12px; border: 1px solid var(--border-color); display: flex; flex-direction: column; align-items: center; text-align: center; transition: all 0.3s; }
        .model-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--primary-color); }
        .model-icon { width: 60px; height: 60px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; color: white; margin-bottom: 1rem; }
        .model-card h3 { margin-bottom: 0.5rem; font-size: 1.1rem; }
        .model-card p { font-size: 0.85rem; color: var(--text-secondary); }

        /* Features */
        .feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
        .feature-item { display: flex; gap: 1.5rem; background: var(--card-bg); padding: 2rem; border-radius: 16px; border: 1px solid var(--border-color); }
        .feature-icon { width: 50px; height: 50px; background: rgba(59, 130, 246, 0.1); color: var(--primary-color); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; flex-shrink: 0; }
        .feature-text h3 { margin-bottom: 0.5rem; font-size: 1.2rem; }
        .feature-text p { color: var(--text-secondary); font-size: 0.95rem; }

        /* 角色展示 */
        .agents-showcase { background: var(--card-bg); border-radius: 24px; border: 1px solid var(--border-color); overflow: hidden; }
        .agents-container { display: flex; }
        .agents-sidebar { width: 280px; background: var(--bg-color); border-right: 1px solid var(--border-color); padding: 1.5rem; }
        .agent-item { display: flex; align-items: center; gap: 12px; padding: 12px; border-radius: 12px; margin-bottom: 8px; cursor: pointer; transition: all 0.2s; border: 1px solid transparent; }
        .agent-item:hover { background: var(--card-bg); border-color: var(--border-color); }
        .agent-item.active { background: var(--card-bg); border-color: var(--primary-color); box-shadow: 0 2px 8px rgba(59, 130, 246, 0.15); }
        .agent-avatar { width: 44px; height: 44px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; color: white; font-size: 1.1rem; flex-shrink: 0; }
        .agent-info { flex: 1; min-width: 0; }
        .agent-info h4 { font-size: 0.95rem; margin-bottom: 2px; }
        .agent-info span { font-size: 0.8rem; color: var(--text-secondary); }
        .agent-config { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--border-color); display: flex; align-items: center; justify-content: center; color: var(--text-secondary); font-size: 0.9rem; cursor: pointer; transition: all 0.2s; flex-shrink: 0; }
        .agent-config:hover { border-color: var(--primary-color); color: var(--primary-color); }
        .agents-main { flex: 1; padding: 2rem; display: flex; flex-direction: column; }
        .agents-chat-header { padding-bottom: 1rem; border-bottom: 1px solid var(--border-color); margin-bottom: 1rem; }
        .agents-chat-header h3 { font-size: 1.1rem; }
        .agents-chat-header span { font-size: 0.85rem; color: var(--text-secondary); }
        .agents-chat-body { flex: 1; display: flex; flex-direction: column; gap: 1rem; padding: 1rem 0; }
        .chat-bubble { max-width: 70%; padding: 12px 16px; border-radius: 16px; font-size: 0.9rem; line-height: 1.5; }
        .chat-bubble.bot { background: var(--bg-color); align-self: flex-start; border-bottom-left-radius: 4px; }
        .chat-bubble.user { background: var(--primary-color); color: white; align-self: flex-end; border-bottom-right-radius: 4px; }
        .chat-bubble .sender { font-size: 0.75rem; font-weight: 600; margin-bottom: 4px; opacity: 0.8; }
        .quick-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 1rem; }
        .quick-btn { padding: 8px 16px; border-radius: 20px; border: 1px solid var(--border-color); background: var(--bg-color); color: var(--text-secondary); font-size: 0.85rem; cursor: pointer; transition: all 0.2s; }
        .quick-btn:hover { border-color: var(--primary-color); color: var(--primary-color); }

        /* Skills */
        .skills-section { background: linear-gradient(180deg, var(--bg-color) 0%, rgba(59, 130, 246, 0.05) 100%); width: 100%; max-width: 100%; padding: 5rem 10%; }
        .skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
        .skill-card { background: var(--card-bg); padding: 2rem 1.5rem; border-radius: 12px; text-align: center; border: 1px solid var(--border-color); transition: all 0.3s; cursor: pointer; }
        .skill-card:hover { background: var(--primary-color); color: white; transform: scale(1.05); }
        .skill-card:hover .skill-icon { color: white; }
        .skill-card:hover p { color: rgba(255,255,255,0.8); }
        .skill-icon { font-size: 2rem; color: var(--primary-color); margin-bottom: 1rem; transition: color 0.3s; }
        .skill-card h3 { margin-bottom: 0.5rem; font-size: 1.1rem; }
        .skill-card p { font-size: 0.85rem; color: var(--text-secondary); transition: color 0.3s; }

        /* 后台截图展示 */
        .admin-preview { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-top: 3rem; }
        .admin-img-placeholder { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
        .admin-img-placeholder .img-header { padding: 12px 16px; background: var(--bg-color); border-bottom: 1px solid var(--border-color); display: flex; align-items: center; gap: 8px; }
        .admin-img-placeholder .img-header span { font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); }
        .admin-img-placeholder .img-body { padding: 0; }
        .admin-img-placeholder .img-body img, .admin-img-placeholder .img-body .mock-admin { width: 100%; height: 300px; object-fit: cover; }
        .mock-admin { background: #0f172a; display: flex; }
        .mock-admin-sidebar { width: 200px; background: #0f172a; padding: 1rem 0.5rem; border-right: 1px solid #1e293b; }
        .mock-admin-sidebar .menu-item { padding: 10px 12px; border-radius: 8px; display: flex; align-items: center; gap: 10px; color: #94a3b8; font-size: 0.85rem; margin-bottom: 4px; }
        .mock-admin-sidebar .menu-item.active { background: #1e293b; color: #60a5fa; }
        .mock-admin-sidebar .menu-item i { width: 20px; text-align: center; }
        .mock-admin-content { flex: 1; background: #0f172a; padding: 1.5rem; }
        .mock-admin-content .line { height: 8px; background: #1e293b; border-radius: 4px; margin-bottom: 12px; }
        .mock-admin-content .line.w60 { width: 60%; }
        .mock-admin-content .line.w40 { width: 40%; }
        .mock-admin-content .line.w80 { width: 80%; }
        .mock-admin-content .block { background: #1e293b; border-radius: 8px; padding: 16px; margin-bottom: 12px; }
        .mock-admin-content .block .line { background: #334155; }
        .mock-chat-preview { background: #f1f5f9; padding: 1.5rem; display: flex; flex-direction: column; }
        .mock-chat-preview .chat-list { display: flex; flex-direction: column; gap: 8px; }
        .mock-chat-preview .chat-row { display: flex; align-items: center; gap: 12px; padding: 10px; background: white; border-radius: 12px; }
        .mock-chat-preview .chat-row .av { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-weight: bold; font-size: 0.9rem; flex-shrink: 0; }
        .mock-chat-preview .chat-row .info { flex: 1; }
        .mock-chat-preview .chat-row .info h5 { font-size: 0.9rem; margin-bottom: 2px; }
        .mock-chat-preview .chat-row .info span { font-size: 0.75rem; color: #64748b; }
        .mock-chat-preview .chat-row .gear { color: #94a3b8; font-size: 0.9rem; }
        .mock-chat-preview .chat-bubble-area { flex: 1; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 12px; padding: 1rem; }
        .mock-chat-preview .chat-bubble-area .bubble { padding: 12px 18px; border-radius: 16px; font-size: 0.85rem; max-width: 80%; }
        .mock-chat-preview .chat-bubble-area .bubble.bot-bubble { background: white; align-self: flex-start; }
        .mock-chat-preview .chat-bubble-area .bubble.user-bubble { background: #3b82f6; color: white; align-self: flex-end; }
        .mock-chat-preview .input-bar { display: flex; gap: 8px; margin-top: 1rem; }
        .mock-chat-preview .input-bar .input-mock { flex: 1; height: 40px; background: white; border-radius: 20px; border: 1px solid #e2e8f0; display: flex; align-items: center; padding: 0 16px; color: #94a3b8; font-size: 0.85rem; }
        .mock-chat-preview .input-bar .send-btn { width: 40px; height: 40px; border-radius: 50%; background: #3b82f6; display: flex; align-items: center; justify-content: center; color: white; font-size: 0.9rem; }

		/* Hero */
.hero { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; min-height: 80vh; }
.badge { background: rgba(59,130,246,0.1); color: var(--primary-color); padding: 4px 12px; border-radius: 20px; font-size: 0.85rem; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; }
.hero h1 { font-size: 3rem; line-height: 1.2; margin: 1.5rem 0; }
.highlight { color: var(--primary-color); }
.hero p { color: var(--text-secondary); margin-bottom: 2rem; font-size: 1.1rem; }
.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem; }
.stats { display: flex; gap: 2rem; }
.stats div strong { display: block; font-size: 1.8rem; color: var(--text-color); }
.stats span { font-size: 0.85rem; color: var(--text-secondary); }

/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.pricing-card { background: var(--card-bg); padding: 2rem; border-radius: 16px; border: 1px solid var(--border-color); text-align: center; }
.pricing-card.featured { border: 2px solid var(--primary-color); transform: scale(1.02); }
.pricing-card .price { font-size: 2rem; font-weight: 700; margin: 1rem 0 0.5rem; color: var(--text-color); }
.pricing-card .price span { font-size: 1rem; font-weight: 400; color: var(--text-secondary); }
.pricing-card .desc { color: var(--text-secondary); margin-bottom: 1.5rem; }
.pricing-features { list-style: none; margin-bottom: 2rem; text-align: left; }
.pricing-features li { padding: 0.5rem 0; display: flex; align-items: center; gap: 10px; font-size: 0.95rem; }
.pricing-features li i { color: var(--primary-color); width: 20px; }
.pricing-features li.disabled { color: var(--text-secondary); opacity: 0.5; }
.pricing-features li.disabled i { color: var(--text-secondary); }

/* Models Grid & Cards */
.models-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
.model-card { background: var(--card-bg); padding: 1.5rem; border-radius: 12px; border: 1px solid var(--border-color); display: flex; flex-direction: column; align-items: center; text-align: center; transition: all 0.3s; cursor: pointer; }
.model-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--primary-color); }
.model-icon { width: 60px; height: 60px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; color: white; margin-bottom: 1rem; }
.model-card h3 { margin-bottom: 0.5rem; font-size: 1.1rem; }
.model-card p { font-size: 0.85rem; color: var(--text-secondary); }

/* Features */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.feature-item { display: flex; gap: 1.5rem; background: var(--card-bg); padding: 2rem; border-radius: 16px; border: 1px solid var(--border-color); }
.feature-icon { width: 50px; height: 50px; background: rgba(59, 130, 246, 0.1); color: var(--primary-color); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; flex-shrink: 0; }
.feature-text h3 { margin-bottom: 0.5rem; font-size: 1.2rem; }

/* 🆕 API Docs */
.apidocs-container { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 2rem; }
.apidocs-tabs { display: flex; gap: 1rem; border-bottom: 1px solid var(--border-color); padding-bottom: 1rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.tab-btn { background: transparent; border: 1px solid var(--border-color); color: var(--text-secondary); padding: 8px 16px; border-radius: 8px; cursor: pointer; display: flex; align-items: center; gap: 6px; transition: all 0.2s; font-family: inherit; }
.tab-btn:hover { border-color: var(--primary-color); color: var(--primary-color); }
.tab-btn.active { background: var(--primary-color); color: white; border-color: var(--primary-color); }
.tab-panel { display: none; animation: fadeIn 0.3s; }
.tab-panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
.api-info-list { list-style: none; background: var(--bg-color); padding: 1.5rem; border-radius: 12px; margin-top: 1rem; }
.api-info-list li { margin-bottom: 0.5rem; font-family: monospace; }
.code-block { background: #1e293b; color: #e2e8f0; border-radius: 12px; margin-top: 1rem; overflow: hidden; }
.code-header { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; background: #0f172a; font-size: 0.85rem; color: #94a3b8; }
.copy-btn { background: transparent; border: 1px solid #334155; color: #cbd5e1; padding: 4px 10px; border-radius: 6px; cursor: pointer; font-size: 0.75rem; }
.copy-btn:hover { background: #334155; }
.code-block pre { margin: 0; padding: 1rem; overflow-x: auto; font-family: "Courier New", monospace; font-size: 0.9rem; line-height: 1.5; }

/* 🆕 Modal */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); display: flex; justify-content: center; align-items: center; z-index: 1000; backdrop-filter: blur(4px); opacity: 0; visibility: hidden; transition: all 0.3s; }
.modal-overlay.show { opacity: 1; visibility: visible; }
.modal-content { background: var(--card-bg); padding: 2.5rem; border-radius: 20px; max-width: 800px; width: 90%; position: relative; box-shadow: 0 20px 40px rgba(0,0,0,0.3); transform: scale(0.9); transition: all 0.3s; max-height: 90vh; overflow-y: auto; }
.modal-overlay.show .modal-content { transform: scale(1); }
.modal-close { position: absolute; top: 1.5rem; right: 1.5rem; font-size: 2rem; cursor: pointer; color: var(--text-secondary); line-height: 1; }
.modal-title { margin-bottom: 1.5rem; font-size: 1.8rem; color: var(--text-color); }
.modal-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
.param-box { background: var(--bg-color); padding: 1.5rem; border-radius: 12px; border: 1px solid var(--border-color); }
.param-box h4 { color: var(--text-secondary); margin-bottom: 1rem; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 1px; }
.param-row { display: flex; justify-content: space-between; padding: 0.6rem 0; border-bottom: 1px dashed var(--border-color); font-size: 0.95rem; }
.param-row:last-child { border-bottom: none; }
.param-label { color: var(--text-secondary); }
.param-val { font-weight: 500; color: var(--text-color); }


        /* Footer */
        footer { text-align: center; padding: 2rem; color: var(--text-secondary); font-size: 0.9rem; border-top: 1px solid var(--border-color); margin-top: 2rem; }

        /* Responsive */
        @media (max-width: 768px) {
            .hero { display:flex;flex-direction: column; text-align: center; padding-top: 4rem; }
            .hero-content { padding-right: 0; margin-bottom: 2rem; }
            .hero-buttons { justify-content: center; }
            .stats { justify-content: center; flex-wrap: wrap; }
            .feature-list { grid-template-columns: 1fr; }
            .agents-container { flex-direction: column; }
            .agents-sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); }
            .admin-preview { grid-template-columns: 1fr; }
            .pricing-grid { grid-template-columns: 1fr; }
            .nav-links { display: none; }
        }

/* Responsive 核心断点 */
        @media (max-width: 900px) {
            .admin-preview { grid-template-columns: 1fr; }
            .mockup-sidebar { width: 50px; }
        }
        @media (max-width: 768px) {
            :root { --section-padding: 3rem 1rem; }
            .navbar { padding: 0.8rem 1rem; }
            .nav-links { position: fixed; top: 60px; left: 0; right: 0; background: var(--card-bg); flex-direction: column; padding: 1.5rem; gap: 1rem; border-bottom: 1px solid var(--border-color); transform: translateY(-120%); transition: transform 0.3s ease; box-shadow: var(--shadow); z-index: 999; align-items: flex-start; }
            .nav-links.active { transform: translateY(0); }
            .mobile-toggle { display: block; }
            .nav-actions { gap: 0.5rem; }
            .nav-actions .btn { padding: 0.4rem 0.8rem; font-size: 0.85rem; }
            .hero { flex-direction: column; text-align: center; gap: 2rem; padding-top: 2rem; }
            .hero-content { padding-right: 0; margin-bottom: 0; }
            .hero-buttons { justify-content: center; flex-direction: column; width: 100%; }
            .hero-buttons .btn { width: 100%; }
            .stats { justify-content: center; gap: 1.5rem; }
            .download-grid, .pricing-grid, .models-grid, .skills-grid, .feature-list { grid-template-columns: 1fr; }
            .feature-item { flex-direction: column; text-align: center; }
            .feature-icon { margin: 0 auto 0.5rem; }
            .mockup-body { min-height: 250px; }
            .mock-admin { height: 220px; }
            .mock-admin-sidebar { width: 140px; }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.8rem; }
            .mockup-window { transform: scale(0.95); }
            .modal-content { padding: 1.5rem; }
            .apidocs-tabs { gap: 0.25rem; }
            .tab-btn { padding: 0.6rem 0.8rem; font-size: 0.9rem; }
        }