* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #1e5799, #207cca, #2989d8, #1e5799);
            color: #fff;
            line-height: 1.6;
            padding: 20px;
            min-height: 100vh;
            background-size: 400% 400%;
            animation: gradientBG 15s ease infinite;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        header {
            text-align: center;
            padding: 40px 20px;
            margin-bottom: 30px;
            animation: fadeInDown 1s ease;
        }
        
        h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
            background: linear-gradient(to right, #ffffff, #a6d8ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
        }
        
        .subtitle {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 25px;
            opacity: 0.9;
            color: #e0f0ff;
        }
        
        .search-box {
            max-width: 600px;
            margin: 0 auto;
            position: relative;
        }
        
        .search-box input {
            width: 100%;
            padding: 15px 20px;
            border-radius: 50px;
            border: none;
            font-size: 1rem;
            box-shadow: 0 5px 20px rgba(0,0,0,0.2);
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.3);
        }
        
        .search-box button {
            position: absolute;
            right: 10px;
            top: 10px;
            background: linear-gradient(to right, #2980b9, #3498db);
            border: none;
            color: white;
            padding: 5px 20px;
            border-radius: 50px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 600;
            box-shadow: 0 3px 10px rgba(0,0,0,0.2);
        }
        
        .search-box button:hover {
            background: linear-gradient(to right, #1a5d8f, #2980b9);
            transform: translateY(-2px);
        }
        
        .filters {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin: 20px 0 40px;
        }
        
        .filter-btn {
            background: rgba(255,255,255,0.15);
            border: 2px solid rgba(255,255,255,0.3);
            color: white;
            padding: 8px 20px;
            border-radius: 50px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 500;
            backdrop-filter: blur(5px);
        }
        
        .filter-btn:hover, .filter-btn.active {
            background: rgba(255,255,255,0.3);
            border-color: white;
        }
        
        .stats {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 15px;
            padding: 15px;
            margin: 0 auto 30px;
            max-width: 800px;
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            backdrop-filter: blur(5px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .stat-item {
            text-align: center;
            padding: 10px;
        }
        
        .stat-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            text-shadow: 0 0 10px rgba(100, 180, 255, 0.7);
        }
        
        .stat-label {
            font-size: 0.9rem;
            color: #cce6ff;
        }
        
        .platforms-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 30px;
            margin-bottom: 50px;
        }
        
        .platform-card {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            animation: fadeInUp 0.8s ease-out;
            animation-fill-mode: backwards;
            color: #333;
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        
        .platform-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.25);
        }
        
        .card-header {
            padding: 25px 25px 20px;
            position: relative;
            flex-grow: 1;
        }
        
        .platform-icon {
            position: absolute;
            top: -25px;
            right: 25px;
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #2980b9, #3498db);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 28px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        
        .purple-bg {
            background: linear-gradient(135deg, #9b59b6, #8e44ad) !important;
        }
        
        .green-bg {
            background: linear-gradient(135deg, #2ecc71, #27ae60) !important;
        }
        
        .red-bg {
            background: linear-gradient(135deg, #e74c3c, #c0392b) !important;
        }
        
        .orange-bg {
            background: linear-gradient(135deg, #f39c12, #d35400) !important;
        }
        
        .teal-bg {
            background: linear-gradient(135deg, #1abc9c, #16a085) !important;
        }
        
        .platform-name {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #2c3e50;
        }
        
        .platform-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 15px 0;
        }
        
        .tag {
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
        }
        
        .tag.blue { background: #e3f2fd; color: #1976d2; }
        .tag.green { background: #e8f5e9; color: #388e3c; }
        .tag.orange { background: #fff3e0; color: #f57c00; }
        .tag.purple { background: #f3e5f5; color: #7b1fa2; }
        .tag.red { background: #ffebee; color: #d32f2f; }
        .tag.cyan { background: #e0f7fa; color: #0097a7; }
        
        .platform-desc {
            color: #555;
            margin: 15px 0;
            font-size: 0.95rem;
            line-height: 1.7;
        }
        
        .card-footer {
            padding: 20px 25px;
            background: #f8f9fa;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid #eee;
        }
        
        .visit-btn {
            padding: 10px 25px;
            background: linear-gradient(to right, #3498db, #2980b9);
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 4px 10px rgba(52, 152, 219, 0.3);
            text-decoration: none;
            display: inline-block;
        }
        
        .visit-btn:hover {
            background: linear-gradient(to right, #2980b9, #1a6ca5);
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(52, 152, 219, 0.4);
        }
        
        .popular-badge {
            background: linear-gradient(to right, #ff6b6b, #ff5252);
            color: white;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
        }
        
        footer {
            text-align: center;
            color: rgba(255,255,255,0.8);
            padding: 30px 0;
            font-size: 0.95rem;
            background: rgba(0,0,0,0.15);
            border-radius: 15px;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .footer-note {
            margin-top: 10px;
            font-size: 0.9rem;
        }

        .url-hint {
            font-size: 0.8rem;
            color: #7f8c8d;
            margin-top: 5px;
            word-break: break-all;
        }
        
        /* Animations */
        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes gradientBG {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            
            .platforms-grid {
                grid-template-columns: 1fr;
            }
            
            .platform-card {
                max-width: 500px;
                margin: 0 auto;
            }
            
            .stat-number {
                font-size: 1.8rem;
            }
        }
        
        @media (max-width: 480px) {
            h1 {
                font-size: 1.8rem;
            }
            
            .subtitle {
                font-size: 1rem;
            }
            
            .search-box input {
                padding: 12px 15px;
            }
            
            .stat-item {
                width: 50%;
            }
            
            .platform-name {
                font-size: 1.4rem;
            }
        }