* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            margin: 0;
            padding: 20px;
            color: #fff;
            background: linear-gradient(135deg, #005050 0%, #003333 100%);
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.2;
            min-height: 100vh;
        }

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

        .back-link {
            display: inline-block;
            color: #4ecdc4;
            text-decoration: none;
            font-weight: 500;
            margin-bottom: 25px;
            padding: 8px 16px;
            border: 1px solid #4ecdc4;
            border-radius: 4px;
            transition: all 0.3s ease;
        }

        .back-link:hover {
            background-color: #4ecdc4;
            color: #003333;
        }

        h1 {
            text-align: center;
            margin: 0 0 30px 0;
            font-size: 2.5rem;
            font-weight: 700;
            color: #ffffff;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }

        /* 分类标题区域优化 */
        .category-header {
            background: rgba(0, 0, 0, 0.25);
            border-radius: 10px;
            margin: 10px 0 10px 0;
            transition: all 0.3s ease;
            border: 1px solid rgba(78, 205, 196, 0.3);
            overflow: hidden;
        }

        .category-header:hover {
            background: rgba(0, 0, 0, 0.35);
            border-color: rgba(78, 205, 196, 0.5);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

        .category-header dt {
            padding: 15px 20px;
            font-size: 1.4rem;
            font-weight: 600;
            border-bottom: 1px solid rgba(78, 205, 196, 0.3);
        }

        .category-header dt a {
            color: #4ecdc4;
            text-decoration: none;
            display: block;
            transition: all 0.3s ease;
            position: relative;
            padding-left: 0px;
        }

        .category-header dt a:before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.2rem;
        }

        .category-header dt a:hover {
            color: #fff;
            transform: translateX(5px);
        }

        /* 网格布局优化 */
        .grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin: 10px 0;
        }

        .grid-item-link {
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 10px;
            padding: 10px;
            transition: all 0.3s ease;
            border: 1px solid rgba(255, 255, 255, 0.1);
            text-decoration: none;
            color: #ffffff;
            font-weight: 500;
            min-height: 25px;
            position: relative;
            overflow: hidden;
        }

        .grid-item-link:before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(78, 205, 196, 0.2), transparent);
            transition: left 0.5s;
        }

        .grid-item-link:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(78, 205, 196, 0.5);
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
            color: #4ecdc4;
        }

        .grid-item-link:hover:before {
            left: 100%;
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .grid-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .grid-container {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            
            .category-header dt {
                padding: 12px 15px;
                font-size: 1.2rem;
            }
            
            .category-header dt a {
                padding-left: 25px;
            }
        }

        @media (max-width: 480px) {
            .category-header dt {
                font-size: 1.1rem;
            }
            
            .grid-item-link {
                padding: 15px;
                min-height: 60px;
            }
        }