* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            color: #333;
            line-height: 1.6;
            padding: 0px;
            min-height: 100vh;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        header {
            text-align: center;
            margin-bottom: 10px;
            padding: 10px;
            background: linear-gradient(to right, #2c3e50, #4a6491);
            color: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        
        h1 {
            font-size: 2.8rem;
            margin-bottom: 10px;
            letter-spacing: 1px;
        }
        
        .subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 800px;
            margin: 0 auto;
        }
        
        /* 手机端快速导航按钮 */
        .mobile-quick-nav {
            display: none;
            justify-content: center;
            gap: 15px;
            margin: 20px 0;
            flex-wrap: wrap;
            position: sticky;
            top: 10px;
            z-index: 100;
            padding: 10px;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        }
        
        .mobile-nav-btn {
            padding: 10px 20px;
            border-radius: 50px;
            font-weight: bold;
            font-size: 0.95rem;
            cursor: pointer;
            border: none;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            text-decoration: none;
            flex: 1;
            min-width: 120px;
            max-width: 200px;
            white-space: nowrap;
            text-align: center;
        }
        
        .mobile-nav-btn.pc-btn {
            background: linear-gradient(to right, #0078d7, #005a9e);
            color: white;
            box-shadow: 0 4px 12px rgba(0, 120, 215, 0.3);
        }
        
        .mobile-nav-btn.tablet-btn {
            background: linear-gradient(to right, #9c27b0, #7b1fa2);
            color: white;
            box-shadow: 0 4px 12px rgba(156, 39, 176, 0.3);
        }
        
        .mobile-nav-btn.mobile-btn {
            background: linear-gradient(to right, #3DDC84, #2CA860);
            color: white;
            box-shadow: 0 4px 12px rgba(61, 220, 132, 0.3);
        }
        
        .mobile-nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
        }
        
        .mobile-nav-btn:active {
            transform: translateY(1px);
        }
        
        .mobile-nav-icon {
            font-size: 1.2rem;
        }

        
        /* 主要卡片区域 */
        .main-content {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 10px;
        }
        
        .card {
            flex: 1;
            min-width: 300px;
            background-color: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            scroll-margin-top: 20px; /* 锚点跳转时的偏移 */
            padding: 10px;
            position: relative;
        }
        
        /* 添加ID用于锚点跳转 */
        #pc-tutorial { border-top: 5px solid #0078d7; }
        #tablet-tutorial { border-top: 5px solid #9c27b0; }
        #mobile-tutorial { border-top: 5px solid #3DDC84; }
        
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
        }
        
        .card-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #1a6dcc, #0d4d9c);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            transition: transform 0.3s ease;
        }
        
        .tablet .card-icon {
            background: linear-gradient(135deg, #9c27b0, #7b1fa2);
        }
        
        .mobile .card-icon {
            background: linear-gradient(135deg, #3DDC84, #2CA860);
        }
        
        .card h2 {
            font-size: 1.8rem;
            margin-bottom: 15px;
            color: #2c3e50;
        }
        
        .btn {
            display: inline-block;
            padding: 12px 25px;
            background: linear-gradient(to right, #1a6dcc, #0d4d9c);
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-weight: bold;
            margin: 15px 0;
            text-align: center;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }
        
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(26, 109, 204, 0.4);
        }
        
        .card p {
            margin-bottom: 15px;
            color: #555;
            line-height: 1.7;
        }
        
        .warning-box {
            background: linear-gradient(135deg, #fff8e1, #fff3cd);
            border-left: 4px solid #ffc107;
            padding: 20px;
            border-radius: 10px;
            margin-top: 25px;
            color: #856404;
        }
        
        /* 官方网址区域 */
        .official-url {
            background-color: white;
            padding: 10px;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            margin-bottom:10px;
            border-top: 5px solid #1a6dcc;
        }
        
        .official-url h3 {
            color: #2c3e50;
            margin-bottom:5px;
            font-size: 1.8rem;
        }
        
        .url-box {
            display: inline-block;
            background: #f0f7ff;
            border: 2px solid #c5deff;
            padding: 5px 15px;
            border-radius: 10px;
            font-size: 1.5rem;
            font-weight: bold;
            color: #1a6dcc;
            margin: 5px 0;
            font-family: 'Courier New', monospace;
            transition: all 0.3s ease;
        }
        
        .url-box:hover {
            background: #e1f0ff;
            border-color: #1a6dcc;
        }
        
        footer {
            text-align: center;
            margin-top: 50px;
            padding: 20px;
            color: #7f8c8d;
            font-size: 0.9rem;
            border-top: 1px solid #eee;
        }
        
        /* 手机端样式优化 */
        @media (max-width: 768px) {
            .main-content {
                flex-direction: column;
            }
            
            h1 {
                font-size: 2.2rem;
            }
            
            .card {
                padding: 10px;
            }
            
            /* 手机端显示快速导航 */
            .mobile-quick-nav {
                display: flex;
            }
            
            .mobile-nav-btn {
                padding: 12px 15px;
                font-size: 0.9rem;
                min-width: 100px;
            }
            
            /* 手机端锚点跳转更平滑 */
            .card {
                scroll-margin-top: 80px; /* 给固定导航留出空间 */
            }
            
            .card-icon {
                width: 50px;
                height: 50px;
            }
            
            .btn {
                display: block;
                margin: 15px 0;
                padding: 14px 20px;
                font-size: 0.95rem;
            }
            
            .url-box {
                padding: 12px 20px;
                font-size: 1.2rem;
            }
        }
        
        /* 桌面端不需要手机导航 */
        @media (min-width: 769px) {
            .mobile-quick-nav {
                display: none;
            }
        }
        /* 内联按钮样式 - 所有按钮在一行 */
        .inline-buttons {
           display: flex;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.6);         
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin: 10px 0;
            padding: 5px;
            background: #f8f9fa;
            border-radius: 12px;
            border: 1px solid #eaeaea;
        }
        .dh {
            display: inline-block;
            text-decoration: none;
            padding: 6px 12px;
            font-weight: 600;
            font-size: 20px;
            transition: all 0.3s ease;
            position: relative;
            text-align: center;
			border-radius: 12px;
        }
        
        /* 第一个按钮 */
        .btn-primary {
            background-color: #3498db;
            color: white;
        }
        
        .btn-primary:hover {
            background-color: #2980b9;
            transform: translateY(-2px);
        }
        
        /* 第二个按钮 */
        .btn-success {
            background-color: #2ecc71;
            color: white;
        }
        
        .btn-success:hover {
            background-color: #27ae60;
            transform: translateY(-2px);
        }
        
        /* 第三个按钮 */
        .btn-warning {
            background-color: #f39c12;
            color: white;
        }
        
        .btn-warning:hover {
            background-color: #d68910;
            transform: translateY(-2px);
        }
        
        /* 第四个按钮 */
        .btn-danger {
            background-color: #e74c3c;
            color: white;
        }
        
        .btn-danger:hover {
            background-color: #c0392b;
            transform: translateY(-2px);
        }