* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        a {text-decoration: none;
           color: #888888;}

        a:hover {
           color: #007BFF;        /* 悬停时变为蓝色 */
       /* text-decoration: underline;  如果希望悬停时显示下划线，可取消注释 */
          font-weight: bold;     /* 可选：加粗 */
         }
        body {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #f1f1f1;
            min-height: 100vh;
            padding: 20px;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        header {
            text-align: center;
            padding: 30px 0;
            margin-bottom: 30px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .logo {
            font-size: 2.8rem;
            margin-bottom: 15px;
            background: linear-gradient(45deg, #4cc9f0, #4361ee);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: inline-block;
        }
        
        .subtitle {
            font-size: 1.1rem;
            opacity: 0.8;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        
        .update-info {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: rgba(0, 0, 0, 0.2);
            padding: 15px 20px;
            border-radius: 10px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }
        
        .update-time {
            font-size: 0.95rem;
        }
        
        .status-indicator {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .status {
            display: flex;
            align-items: center;
            gap: 5px;
            font-size: 0.9rem;
        }
        
        .status-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
        }
        
        .online {
            background-color: #4CAF50;
            box-shadow: 0 0 8px #4CAF50;
        }
        
        .maintenance {
            background-color: #FF9800;
            box-shadow: 0 0 8px #FF9800;
        }
        
        .offline {
            background-color: #F44336;
            box-shadow: 0 0 8px #F44336;
        }
        
        .websites-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 25px;
            margin-bottom: 40px;
        }
        
        .website-card {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 15px;
            padding: 25px;
            transition: all 0.3s ease;
            border: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
            overflow: hidden;
        }
        
        .website-card:hover {
            transform: translateY(-5px);
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(74, 144, 226, 0.3);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }
        
        .website-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, #4a90e2, #5d6afb);
        }
        
        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }
        
        .website-name {
            font-size: 1.5rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        /* 图标样式 - 这里可以自定义图标颜色和大小 */
        .website-icon {
            font-size: 1.8rem;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
        }
        
        /* 不同类别的图标背景色 */
        .icon-ecommerce {
            background: rgba(76, 175, 80, 0.15);
            color: #4CAF50;
        }
        
        .icon-social {
            background: rgba(33, 150, 243, 0.15);
            color: #2196F3;
        }
        
        .icon-tech {
            background: rgba(156, 39, 176, 0.15);
            color: #9C27B0;
        }
        
        .icon-content {
            background: rgba(255, 152, 0, 0.15);
            color: #FF9800;
        }
        
        .icon-download {
            background: rgba(244, 67, 54, 0.15);
            color: #F44336;
        }
        
        .icon-education {
            background: rgba(0, 150, 136, 0.15);
            color: #009688;
        }
        
        .website-category {
            background: rgba(74, 144, 226, 0.2);
            color: #4a90e2;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
        }
        
        .website-description {
            color: #aaa;
            line-height: 1.6;
            margin-bottom: 25px;
            font-size: 0.95rem;
        }
        
        .address-section {
            margin-bottom: 20px;
        }
        
        .address-label {
            font-size: 0.9rem;
            color: #888;
            margin-bottom: 8px;
        }
        
        .address-container {
            display: flex;
            background: rgba(0, 0, 0, 0.3);
            border-radius: 8px;
            overflow: hidden;
        }
        
        .address-text {
            padding: 12px 15px;
            flex-grow: 1;
            font-family: monospace;
            word-break: break-all;
            font-size: 1rem;
        }
        
        .copy-btn {
            background: #4a90e2;
            color: white;
            border: none;
            padding: 0 18px;
            cursor: pointer;
            transition: background 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .copy-btn:hover {
            background: #3a7bc8;
        }
        
        .card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 20px;
            padding-top: 15px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.85rem;
        }
        
        .visit-btn {
            background: linear-gradient(45deg, #4a90e2, #5d6afb);
            color: white;
            text-decoration: none;
            padding: 8px 20px;
            border-radius: 6px;
            font-weight: 500;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        
        .visit-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 5px 15px rgba(74, 144, 226, 0.4);
        }
        
        .status-badge {
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        
        .status-online {
            background: rgba(76, 175, 80, 0.2);
            color: #4CAF50;
        }
        
        .status-maintenance {
            background: rgba(255, 152, 0, 0.2);
            color: #FF9800;
        }
        
        .status-offline {
            background: rgba(244, 67, 54, 0.2);
            color: #F44336;
        }
        
        .instructions {
            background: rgba(0, 0, 0, 0.2);
            border-radius: 10px;
            padding: 25px;
            margin-top: 20px;
            border-left: 4px solid #4a90e2;
        }
        
        .instructions h3 {
            margin-bottom: 15px;
            color: #4a90e2;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .instructions ul {
            padding-left: 20px;
            line-height: 1.8;
            color: #ccc;
        }
        
        .instructions li {
            margin-bottom: 8px;
        }
        
        footer {
            text-align: center;
            padding: 30px 0;
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #888;
            font-size: 0.9rem;
        }
        
        @media (max-width: 768px) {
            .websites-grid {
                grid-template-columns: 1fr;
            }
            
            .update-info {
                flex-direction: column;
                gap: 15px;
                align-items: flex-start;
            }
            
            .logo {
                font-size: 2.2rem;
            }
        }
        
        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            background: #4CAF50;
            color: white;
            padding: 15px 25px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
            display: none;
            z-index: 1000;
            animation: slideIn 0.3s ease;
        }
        
        @keyframes slideIn {
            from { transform: translateX(100%); opacity: 0; }
            to { transform: translateX(0); opacity: 1; }
        }
        
        /* 图标选择器面板 */
        .icon-selector {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            z-index: 1001;
            justify-content: center;
            align-items: center;
        }
        
        .icon-selector-content {
            background: #1e2a47;
            padding: 30px;
            border-radius: 15px;
            max-width: 800px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
        }
        
        .icon-selector h3 {
            margin-bottom: 20px;
            color: #4a90e2;
            text-align: center;
        }
        
        .icon-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 15px;
        }
        
        .icon-option {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
            padding: 15px;
            text-align: center;
            cursor: pointer;
            transition: all 0.2s;
        }
        
        .icon-option:hover {
            background: rgba(74, 144, 226, 0.2);
            transform: scale(1.05);
        }
        
        .icon-option i {
            font-size: 2rem;
            margin-bottom: 8px;
            display: block;
        }
        
        .icon-option span {
            font-size: 0.8rem;
            color: #aaa;
        }
        
        .close-selector {
            background: #4a90e2;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 6px;
            cursor: pointer;
            margin-top: 20px;
            display: block;
            margin-left: auto;
            margin-right: auto;
        }
  
/* --- 返回顶部按钮核心样式 --- */
        #backToTopBtn {
            position: fixed;       /* 固定定位，不随页面滚动 */
            bottom: 30px;          /* 距离底部距离 */
            right: 30px;           /* 距离右侧距离 */
            z-index: 9999;         /* 确保在最上层 */
            
            /* 外观样式 */
            width: 50px;
            height: 50px;
            background-color: #007bff; /* 蓝色背景 */
            color: white;              /* 图标白色 */
            border: none;
            border-radius: 50%;        /* 圆形按钮 */
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2); /* 阴影增加立体感 */
            
            /* 居中图标 */
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;         /* 图标大小 */
            
            /* 初始状态：隐藏且向下偏移，用于动画 */
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all 0.3s ease; /* 平滑过渡动画 */
        }

        /* 鼠标悬停效果 */
        #backToTopBtn:hover {
            background-color: #0056b3; /* 深蓝色 */
            transform: translateY(-5px); /* 轻微上浮 */
        }

        /* 显示状态的类（由 JS控制添加） */
        #backToTopBtn.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }