    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.6;
            min-height: 100vh;
            padding-top: 60px; /* 为固定导航栏留出空间 */
            padding-bottom: 10px; /* 为底部留出空间 */
        }
        
        /* 基础链接样式 */
        .basic-link {
            color: #3498db;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        
        .basic-link:hover {
            color: #2980b9;
            text-decoration: underline;
        }

        /* 按钮样式 */
        .open-btn {
            background: #1877f2;
            color: white;
            border: none;
            padding: 15px 30px;
            font-size: 18px;
            border-radius: 8px;
            cursor: pointer;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }

        /* 表单样式 */
        .input-group {
            margin-bottom: 15px;
        }
        
        input {
            width: 30%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 16px;
        }
        
        input:focus {
            outline: none;
            border-color: #1877f2;
        }

        /* 横向导航 - 固定定位，宽度100% */
        .horizontal-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 98%;
            background: linear-gradient(135deg, #2c3e50 0%, #1a2530 100%);
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        
        .logo {
            color: white;
            font-size: 1.5rem;
            font-weight: 600;
            padding: 20px 0;
        }
        
        .horizontal-tabs {
            display: flex;
            gap: 1px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            overflow: hidden;
        }
        
        .horizontal-tab {
            padding: 16px 24px;
            background: transparent;
            border: none;
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            white-space: nowrap;
        }
        
        .horizontal-tab:hover {
            color: white;
            background-color: rgba(255, 255, 255, 0.1);
        }
        
        .horizontal-tab.active {
            color: white;
            background-color: rgba(255, 255, 255, 0.15);
        }
        
        .horizontal-tab.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 10%;
            width: 80%;
            height: 3px;
            background: linear-gradient(to right, #3498db, #2ecc71);
            border-radius: 3px 3px 0 0;
        }
        
        /* 主容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            overflow: hidden;
        }
        
        /* 简洁顶部标题 */
        .page-header {
            padding: 30px 40px 20px;
            border-bottom: 1px solid #eee;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        }
        
        .page-title {
            color: #2c3e50;
            font-size: 2rem;
            margin-bottom: 8px;
            font-weight: 600;
        }
        
        .page-subtitle {
            color: #7f8c8d;
            font-size: 1.1rem;
        }
        
        /* 主内容区域 */
        .main-content {
            display: flex;
            min-height: 500px;
        }
        
        .tabs-container {
            flex: 0 0 250px;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            padding: 30px 0;
            border-right: 1px solid #eee;
        }
        
        .tabs {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 0 20px;
        }
        
        .tab {
            display: flex;
            align-items: center;
            gap: 15px;
            padding: 18px 20px;
            background: transparent;
            border: none;
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: left;
            color: #5a6c7d;
            font-size: 1.05rem;
            font-weight: 500;
            position: relative;
            overflow: hidden;
        }
        
        .tab:hover {
            background-color: rgba(255, 255, 255, 0.7);
            color: #3498db;
            transform: translateX(5px);
        }
        
        .tab.active {
            background-color: white;
            color: #2c3e50;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transform: translateX(5px);
        }
        
        .tab.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 4px;
            background: linear-gradient(to bottom, #3498db, #2ecc71);
        }
        
        .tab-icon {
            font-size: 1.4rem;
            width: 30px;
            text-align: center;
        }
        
        .tab-content {
            flex: 1;
            padding: 40px;
        }
        
        .content-panel {
            display: none;
            animation: fadeIn 0.5s ease;
        }
        
        .content-panel.active {
            display: block;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .content-title {
            font-size: 1.8rem;
            color: #2c3e50;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 2px solid #f0f0f0;
        }
        
        .content-text {
            color: #555;
            font-size: 1.1rem;
            line-height: 1.7;
            margin-bottom: 25px;
        }
        
        .content-highlight {
            background: linear-gradient(120deg, #e3f2fd 0%, #f3e5f5 100%);
            padding: 25px;
            border-radius: 12px;
            border-left: 5px solid #3498db;
            margin: 25px 0;
        }
        
        .content-list {
            list-style-type: none;
            margin: 20px 0;
        }
        
        .content-list li {
            padding: 10px 0;
            padding-left: 30px;
            position: relative;
        }
        
        .content-list li:before {
            content: '✓';
            position: absolute;
            left: 0;
            color: #2ecc71;
            font-weight: bold;
        }
        
        .demo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 15px;
            margin-top: 25px;
        }
        
        .demo-item {
            background: #f8f9fa;
            padding: 15px;
            border-radius: 8px;
            text-align: center;
            transition: transform 0.3s;
        }
        
        .demo-item:hover {
            transform: translateY(-5px);
            background: #e9ecef;
        }
        
        /* 底部 - 宽度100% */
        .page-footer {
            /*position: fixed;*/
            bottom: 0;
            left: 0;
            width: 98%;
            padding: 20px;
            background: linear-gradient(135deg, #2c3e50 0%, #1a2530 100%);
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.9rem;
            text-align: center;
            z-index: 1000;
            box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
        }
        
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .container {
                margin: 20px;
                width: calc(100% - 40px);
            }
            
            .horizontal-nav {
                padding: 0 15px;
            }
        }
        
        @media (max-width: 768px) {
            body {
                padding-top: 120px; /* 为固定导航栏留出更多空间（移动端导航更高） */
                padding-bottom: 100px; /* 为底部留出更多空间 */
            }
            
            .horizontal-nav {
                flex-direction: column;
                padding: 10px 15px;
            }
            
            .logo {
                padding: 10px 0;
                width: 100%;
                text-align: center;
                font-size: 1.3rem;
            }
            
            .horizontal-tabs {
                width: 100%;
                justify-content: center;
            }
            
            .horizontal-tab {
                padding: 12px 16px;
                font-size: 0.9rem;
            }
            
            .main-content {
                flex-direction: column;
            }
            
            .tabs-container {
                flex: 0 0 auto;
                border-right: none;
                border-bottom: 1px solid #eee;
                padding: 20px 0;
            }
            
            .tabs {
                flex-direction: row;
                justify-content: center;
                flex-wrap: wrap;
            }
            
            .tab {
                flex: 1;
                min-width: 150px;
                justify-content: center;
            }
            
            .tab:hover, .tab.active {
                transform: translateY(-3px);
            }
            
            .tab.active::before {
                width: 100%;
                height: 4px;
                top: auto;
                bottom: 0;
            }
            
            .page-header, .page-footer, .tab-content {
                padding: 25px 20px;
            }
            
            .content-title {
                font-size: 1.6rem;
            }
            
            .page-footer {
                padding: 15px;
            }
        }
        
        @media (max-width: 576px) {
            body {
                padding-top: 130px;
                padding-bottom: 110px;
            }
            
            .horizontal-tabs {
                flex-direction: column;
                width: 100%;
            }
            
            .horizontal-tab {
                text-align: center;
                padding: 12px;
            }
            
            .tabs {
                flex-direction: column;
            }
            
            .page-title {
                font-size: 1.6rem;
            }
            
            .content-title {
                font-size: 1.4rem;
            }
            
            .demo-grid {
                grid-template-columns: 1fr;
            }
        }
    </style>