/* 基础样式 */
        :root {
            --primary-color: #3498db;
            --secondary-color: #2c3e50;
            --sports-color: #e74c3c;
            --background-color: #f5f7fa;
            --card-color: #ffffff;
            --text-color: #333333;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }

        .dark-theme {
            --primary-color: #2980b9;
            --secondary-color: #34495e;
            --sports-color: #c0392b;
            --background-color: #1a1a1a;
            --card-color: #2d2d2d;
            --text-color: #f5f5f5;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }

        body {
            background-color: var(--background-color);
            color: var(--text-color);
            transition: background-color 0.3s, color 0.3s;
            min-height: 100vh;
            position: relative;
            padding-bottom: 60px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        header {
            text-align: center;
            margin-bottom: 0px;
            padding: 5px 0;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: 12px;
            color: white;
            box-shadow: var(--shadow);
        }

        .logo {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            margin-bottom: 10px;
        }

        .logo i {
            margin-right: 15px;
        }

        .description {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 20px;
        }

        .search-box {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
            background: white;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        }

        .search-engine-select {
            border: none;
            padding: 0 15px;
            background: #f1f1f1;
            outline: none;
            cursor: pointer;
            font-size: 14px;
            border-right: 1px solid #ddd;
        }

        .search-input {
            flex: 1;
            border: none;
            padding: 15px 20px;
            font-size: 16px;
            outline: none;
        }

        .search-btn {
            border: none;
            background: var(--primary-color);
            color: white;
            padding: 0 25px;
            cursor: pointer;
            transition: background 0.3s;
        }

        .search-btn:hover {
            background: var(--secondary-color);
        }

        .section-title {
            display: flex;
            align-items: center;
            margin: 0px 0 20px;
            font-size: 1.5rem;
            color: var(--secondary-color);
        }

        .section-title i {
            margin-right: 10px;
        }

        .sites-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 20px;
            margin-bottom: 40px;
        }

        .site-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-decoration: none;
            background: var(--card-color);
            border-radius: 12px;
            padding: 5px 10px;
            box-shadow: var(--shadow);
            transition: transform 0.3s, box-shadow 0.3s;
            color: var(--text-color);
        }

        .site-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
        }

        .site-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 10px;
            font-size: 24px;
            color: white;
        }

        .site-icon img {
            width: 60px;
            height: 60px;
            object-fit: contain;
        }

        .site-name {
            font-weight: 600;
            text-align: center;
            font-size: 14px;
        }

        /* 图标背景色 */
        .baidu { background: #2932e1; }
        .weibo { background: #e6162d; }
        .sina { background: #ea1a1a; }
        .tencent { background: #12b7f5; }
        .meituan { background: #ffc300; }
        .taobao { background: #ff4400; }
        .xiecheng { background: #1ba9ee; }
        .zhihu { background: #0084ff; }
        .bilibili { background: #fb7299; }
        .jd { background: #c91623; }
        .douyin { background: #000; }
        .netease { background: #e60000; }
        .douban { background: #2e963d; }
        .toutiao { background: #e85959; }
        .kuaishou { background: #ffc300; }
        .sports { background: var(--sports-color); }
        .football { background: #27ae60; }
        .basketball { background: #e67e22; }
        .live { background: #9b59b6; }
        .score { background: #34495e; }
        .tennis { background: #16a085; }
        .esports { background: #8e44ad; }

        footer {
            text-align: center;
            padding: 20px;
            background: var(--secondary-color);
            color: white;
            position: absolute;
            bottom: 0;
            width: 100%;
        }

        .theme-switcher {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 20px;
            cursor: pointer;
            box-shadow: var(--shadow);
            z-index: 100;
        }

        /* 悬浮客服按钮样式 */
        .floating-service {
            position: fixed;
            top: 30px;
            right: 30px;
            z-index: 1000;
        }
        
        .service-btn {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #ff6b6b, #ee5a24);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            cursor: pointer;
            transition: all 0.3s ease;
            animation: pulse 2s infinite;
            border: none;
            outline: none;
            text-decoration: none;
            z-index: 1001;
        }
        
        .service-btn:hover {
            transform: scale(1.1);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }
        
        .service-btn:active {
            transform: scale(0.95);
        }
        
        .service-tooltip {
            position: absolute;
            top: 50%;
            right: 75px;
            transform: translateY(-50%);
            background: rgba(44, 62, 80, 0.9);
            color: white;
            padding: 8px 15px;
            border-radius: 4px;
            font-size: 14px;
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        
        .service-btn:hover + .service-tooltip {
            opacity: 1;
        }
        
        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(255, 107, 107, 0.7);
            }
            70% {
                box-shadow: 0 0 0 10px rgba(255, 107, 107, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(255, 107, 107, 0);
            }
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .floating-service {
                top: 20px;
                right: 20px;
            }
            
            .service-btn {
                width: 50px;
                height: 50px;
                font-size: 20px;
            }
            
            .service-tooltip {
                font-size: 12px;
                padding: 6px 10px;
                right: 60px;
            }
            
            .theme-switcher {
                bottom: 20px;
                right: 20px;
                width: 45px;
                height: 45px;
            }
        }