* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #1a2a6c, #b21f1f, #1a2a6c);
            background-size: 400% 400%;
            animation: gradientBG 15s ease infinite;
            color: #333;
            min-height: 100vh;
            padding: 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        @keyframes gradientBG {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }
        
        .container {
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
        }
        
        header {
            text-align: center;
            padding: 30px 20px;
            margin-bottom: 30px;
            animation: fadeInDown 1s ease;
        }
        
        .logo {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
            margin-bottom: 15px;
        }
        
        .logo i {
            font-size: 2.8rem;
            color: #FF6F00;
            background: white;
            border-radius: 50%;
            padding: 15px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        
        h1 {
            font-size: 3.2rem;
            color: white;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
            letter-spacing: 1px;
            margin-bottom: 10px;
        }
        
        .subtitle {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.4rem;
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.6;
        }
        
        .grid-container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
            margin-top: 20px;
        }
        
        .category-card {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        
        .category-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.25);
        }
        
        .category-header {
            background: linear-gradient(90deg, #FF6F00, #FF8F00);
            color: white;
            padding: 20px;
            text-align: center;
            font-size: 1.6rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }
        
        .category-header i {
            font-size: 1.8rem;
        }
        
        .category-links {
            padding: 0;
            flex-grow: 1;
        }
        
        .category-links a {
            display: block;
            padding: 16px 20px;
            text-decoration: none;
            color: #444;
            font-size: 1.1rem;
            border-bottom: 1px solid #f0f0f0;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .category-links a:last-child {
            border-bottom: none;
        }
        
        .category-links a:hover {
            background-color: #f9f9f9;
            padding-left: 25px;
            color: #FF6F00;
        }
        
        .category-links a i {
            color: #FF6F00;
            font-size: 1.2rem;
            min-width: 24px;
            text-align: center;
        }
        
        footer {
            text-align: center;
            padding: 30px 0;
            margin-top: 50px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            width: 100%;
        }
        
        /* 响应式设计 */
        @media (max-width: 1100px) {
            .grid-container {
                grid-template-columns: repeat(2, 1fr);
            }
            
            h1 {
                font-size: 2.8rem;
            }
        }
        
        @media (max-width: 768px) {
            .grid-container {
                grid-template-columns: 1fr;
            }
            
            h1 {
                font-size: 2.4rem;
            }
            
            .subtitle {
                font-size: 1.2rem;
            }
            
            .category-header {
                font-size: 1.4rem;
            }
        }
        
        @media (max-width: 480px) {
            h1 {
                font-size: 2rem;
            }
            
            .logo i {
                font-size: 2.2rem;
                padding: 12px;
            }
            
            .category-header {
                font-size: 1.3rem;
                padding: 15px;
            }
            
            .category-links a {
                padding: 14px 15px;
                font-size: 1rem;
            }
        }
        
        /* 动画效果 */
        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .category-card {
            animation: fadeInUp 0.6s ease forwards;
            opacity: 0;
        }
        
        .category-card:nth-child(1) { animation-delay: 0.1s; }
        .category-card:nth-child(2) { animation-delay: 0.2s; }
        .category-card:nth-child(3) { animation-delay: 0.3s; }
        .category-card:nth-child(4) { animation-delay: 0.4s; }
        .category-card:nth-child(5) { animation-delay: 0.5s; }
        .category-card:nth-child(6) { animation-delay: 0.6s; }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* 搜索框样式 */
        .search-container {
            max-width: 600px;
            margin: 20px auto 40px;
            position: relative;
        }
        
        .search-box {
            width: 100%;
            padding: 15px 20px;
            border-radius: 50px;
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            font-size: 1.1rem;
            outline: none;
            transition: all 0.3s ease;
        }
        
        .search-box:focus {
            box-shadow: 0 8px 25px rgba(255, 111, 0, 0.4);
        }
        
        .search-btn {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: #FF6F00;
            color: white;
            border: none;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .search-btn:hover {
            background: #e65c00;
            transform: translateY(-50%) scale(1.1);
        }