* {
            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: 10px;
            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;
        }
        
        /* 新增：快速导航按钮 */
        .quick-nav {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin: 25px 0;
            flex-wrap: wrap;
        }
        
        .nav-btn {
            padding: 12px 25px;
            border-radius: 50px;
            font-weight: bold;
            font-size: 1.1rem;
            cursor: pointer;
            border: none;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            text-decoration: none;
            min-width: 200px;
        }
        
        .nav-btn.android-btn {
            background: linear-gradient(to right, #3DDC84, #2CA860);
            color: white;
            box-shadow: 0 4px 15px rgba(61, 220, 132, 0.3);
        }
        
        .nav-btn.ios-btn {
            background: linear-gradient(to right, #007AFF, #0056CC);
            color: white;
            box-shadow: 0 4px 15px rgba(0, 122, 255, 0.3);
        }
        
        .nav-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }
        
        .nav-btn:active {
            transform: translateY(1px);
        }
        
        .nav-btn-icon {
            font-size: 1.5rem;
        }
        
        .intro {
            background-color: white;
            padding: 25px;
            border-radius: 12px;
            margin-bottom: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border-left: 5px solid #3498db;
        }
        
        .intro p {
            margin-bottom: 15px;
            font-size: 1.1rem;
        }
        
        .platforms {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 10px;
        }
        
        .platform-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 */
        }
        
        .platform-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
        }
        
        .android {
            border-top: 5px solid #3DDC84;
        }
        
        .ios {
            border-top: 5px solid #007AFF;
        }
        
        .card-header {
            padding: 25px;
            color: white;
            display: flex;
            align-items: center;
        }
        
        .android .card-header {
            background: linear-gradient(to right, #3DDC84, #2CA860);
        }
        
        .ios .card-header {
            background: linear-gradient(to right, #007AFF, #0056CC);
        }
        
        .card-header h2 {
            font-size: 1.8rem;
            margin-left: 15px;
        }
        
        .card-icon {
            font-size: 2.5rem;
        }
        
        .steps {
            padding: 25px;
        }
        
        .step {
            display: flex;
            margin-bottom: 25px;
            padding-bottom: 25px;
            border-bottom: 1px solid #eee;
        }
        
        .step:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        
        .step-number {
            display: flex;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            color: white;
            font-weight: bold;
            font-size: 1.2rem;
            margin-right: 20px;
            flex-shrink: 0;
        }
        
        .android .step-number {
            background-color: #3DDC84;
        }
        
        .ios .step-number {
            background-color: #007AFF;
        }
        
        .step-content h3 {
            margin-bottom: 8px;
            color: #2c3e50;
        }
        
        .step-content p {
            color: #555;
        }
        .step-content p  img{
           width:100%;
        }
        .dns-example {
            background-color: #f8f9fa;
            padding: 15px;
            border-radius: 8px;
            margin-top: 10px;
            border-left: 4px solid #f1c40f;
        }
        
        .dns-example h4 {
            margin-bottom: 5px;
            color: #e67e22;
        }
        
        .code {
            font-family: 'Courier New', monospace;
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 10px 15px;
            border-radius: 5px;
            margin-top: 8px;
            display: inline-block;
        }
        
        .note {
            background-color: #fff8e1;
            padding: 25px;
            border-radius: 12px;
            margin-top: 10px;
            border-left: 5px solid #ffb300;
        }
        
        .note h3 {
            color: #e65100;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }
        
        .note ul {
            padding-left: 20px;
        }
        
        .note li {
            margin-bottom: 10px;
        }
        
        footer {
            text-align: center;
            margin-top: 10px;
            padding: 20px;
            color: #7f8c8d;
            font-size: 0.9rem;
            border-top: 1px solid #eee;
        }
        
        /* 手机端样式优化 */
        @media (max-width: 768px) {
            .platforms {
                flex-direction: column;
            }
            
            h1 {
                font-size: 2.2rem;
            }
            
            .card-header {
                padding: 20px;
            }
            
            .step {
                flex-direction: column;
            }
            
            .step-number {
                margin-bottom: 10px;
                margin-right: 0;
            }
            
            /* 手机端显示快速导航 */
            .quick-nav {
                flex-direction: column;
                align-items: center;
                margin: 20px 0;
            }
            
            .nav-btn {
                width: 90%;
                max-width: 300px;
                padding: 15px 20px;
            }
            
            /* 手机端锚点跳转更平滑 */
            .platform-card {
                scroll-margin-top: 10px;
            }
        }
        
        /* 桌面端隐藏快速导航 */
        @media (min-width: 769px) {
            .quick-nav {
                display: none;
            }
        }
        .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;
        }
       /* 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);
        }