/* 下载列表自定义样式 */
        .download-item {
            transition: all 0.3s ease;
            margin-bottom: 30px;
        }

        .download-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        .download-item__img {
            height: 220px;
            overflow: hidden;
            border-radius: 8px 8px 0 0;
        }

        .download-item__img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .download-item:hover .download-item__img img {
            transform: scale(1.05);
        }

        .download-item__content {
            padding: 20px;
            background: #fff;
            border-radius: 0 0 8px 8px;
            border: 1px solid #eee;
            border-top: none;
        }

        .download-item__title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: #222;
            line-height: 1.4;
        }

        .download-item__desc {
            color: #666;
            margin-bottom: 15px;
            font-size: 14px;
            line-height: 1.6;
        }

        .download-item__meta {
            display: flex;
            justify-content: space-between;
            color: #999;
            font-size: 12px;
            margin-bottom: 15px;
        }

        .download-btn {
            display: inline-block;
            padding: 10px 24px;
            background: #2c3e50;
            color: #fff;
            border-radius: 4px;
            font-weight: 500;
            transition: all 0.3s ease;
            width: 100%;
            text-align: center;
        }

        .download-btn:hover {
            background: #34495e;
            color: #fff;
            text-decoration: none;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        /* 留言弹窗样式优化 */
        #download-form-popup {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 9999;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .popup-content {
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            width: 100%;
            max-width: 500px;
            position: relative;
            animation: popupFadeIn 0.3s ease;
        }

        @keyframes popupFadeIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .close-popup {
            position: absolute;
            top: 15px;
            right: 15px;
            font-size: 24px;
            cursor: pointer;
            color: #666;
            transition: color 0.3s ease;
        }

        .close-popup:hover {
            color: #e74c3c;
        }

        .popup-title {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 25px;
            color: #222;
            text-align: center;
            padding-bottom: 15px;
            border-bottom: 1px solid #eee;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 500;
            font-size: 14px;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 14px;
            transition: border-color 0.3s ease;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #2c3e50;
            box-shadow: 0 0 0 2px rgba(44, 62, 80, 0.1);
        }

        .form-group textarea {
            height: 100px;
            resize: none;
        }

        .submit-btn {
            width: 100%;
            padding: 14px;
            background: #2c3e50;
            color: #fff;
            border: none;
            border-radius: 4px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 16px;
        }

        .submit-btn:hover {
            background: #34495e;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        .submit-btn:disabled {
            background: #95a5a6;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        /* 空数据提示样式 */
        .empty-data {
            text-align: center;
            padding: 80px 20px;
        }

        .empty-data img {
            width: 120px;
            margin-bottom: 20px;
            opacity: 0.5;
        }

        .empty-data h3 {
            font-size: 20px;
            color: #333;
            margin-bottom: 10px;
        }

        .empty-data p {
            color: #666;
            max-width: 400px;
            margin: 0 auto;
        }

        /* 分页样式 */
        .pagination-wrapper {
            margin-top: 50px;
            text-align: center;
        }

        .pagination {
            display: inline-flex;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .pagination li {
            margin: 0 4px;
        }

        .pagination a,
        .pagination span {
            display: inline-block;
            padding: 8px 16px;
            border: 1px solid #ddd;
            border-radius: 4px;
            color: #333;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .pagination a:hover {
            background: #f5f5f5;
            border-color: #ccc;
        }

        .pagination .active span {
            background: #2c3e50;
            color: #fff;
            border-color: #2c3e50;
        }

        .pagination .disabled span {
            color: #999;
            cursor: not-allowed;
            background: #f9f9f9;
        }

        /* 加载中遮罩 */
        .loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.8);
            z-index: 99999;
            display: none;
            align-items: center;
            justify-content: center;
            flex-direction: column;
        }

        .loading-spinner {
            width: 50px;
            height: 50px;
            border: 5px solid #f3f3f3;
            border-top: 5px solid #2c3e50;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-bottom: 20px;
        }

        @keyframes spin {
            0% {
                transform: rotate(0deg);
            }

            100% {
                transform: rotate(360deg);
            }
        }

        .loading-text {
            font-size: 16px;
            color: #333;
            font-weight: 500;
        }