/* 文件信息卡片 */
        .file-info-card {
            background-color: white;
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
            border: 1px solid #eaeff7;
        }
        
        .file-info-header {
            display: flex;
            align-items: flex-start;
            margin-bottom: 25px;
            padding-bottom: 25px;
            border-bottom: 2px solid #f0f5ff;
        }
        
        .file-icon-large {
            width: 100px;
            height: 100px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 25px;
            font-size: 42px;
            color: white;
            flex-shrink: 0;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }
        
        .file-icon-large.pdf {
            background: linear-gradient(135deg, #e74c3c 0%, #ff6b6b 100%);
        }
        
        .file-icon-large.word {
            background: linear-gradient(135deg, #2a5bd7 0%, #4a7bf0 100%);
        }
        
        .file-icon-large.excel {
            background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
        }
        
        .file-icon-large.zip {
            background: linear-gradient(135deg, #9b59b6 0%, #be90d4 100%);
        }
        
        .file-info-text {
            flex: 1;
        }
        
        .file-info-text h2 {
            font-size: 24px;
            color: #1a3c8b;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .file-info-text p{
                font-size: 14px;
    line-height: 1.7;
    color: #666;
        }
        
        .file-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 15px;
        }
        
        .file-tag {
            font-size: 13px;
            padding: 5px 12px;
            border-radius: 20px;
            font-weight: bold;
        }
        
        .file-tag.hot {
            background-color: #ffeaa7;
            color: #d63031;
        }
        
        .file-tag.new {
            background-color: #a29bfe;
            color: white;
        }
        
        .file-tag.official {
            background-color: #74b9ff;
            color: white;
        }
        
        .file-tag.free {
            background-color: #2ecc71;
            color: white;
        }
        
        .file-stats {
            display: flex;
            gap: 25px;
            margin-top: 15px;
        }
        
        .file-stat {
            display: flex;
            align-items: center;
            color: #666;
            font-size: 15px;
        }
        
        .file-stat i {
            margin-right: 8px;
            color: #2a5bd7;
            font-size: 18px;
        }
        
        .file-stat-number {
            font-weight: bold;
            color: #1a3c8b;
            margin-left: 5px;
        }
        
        /* 文件详细信息 */
        .file-details {
            margin-top: 20px;
        }
        
        .detail-section {
            margin-bottom: 25px;
        }
        
        .detail-section:last-child {
            margin-bottom: 0;
        }
        
        .detail-section h3 {
            font-size: 18px;
            color: #1a3c8b;
            margin-bottom: 15px;
            padding-bottom: 8px;
            border-bottom: 2px solid #f0f5ff;
            display: flex;
            align-items: center;
        }
        
        .detail-section h3 i {
            margin-right: 10px;
            color: #2a5bd7;
        }
        
        .detail-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }
        
        .detail-item {
            display: flex;
            font-size: 14px;
        }
        
        .detail-label {
            width: 120px;
            color: #666;
            font-weight: 600;
            flex-shrink: 0;
        }
        
        .detail-value {
            flex: 1;
            color: #333;
        }
        
        .detail-value a {
            color: #2a5bd7;
            transition: all 0.3s;
        }
        
        .detail-value a:hover {
            color: #1a3c8b;
            text-decoration: underline;
        }
        
        /* 文件描述 */
        .file-description {
            background-color: #f8fafe;
            padding: 20px;
            border-radius: 10px;
            border-left: 4px solid #2a5bd7;
            line-height: 1.7;
            font-size: 15px;
        }
        
        /* 下载选项区域 */
        .download-options {
            background-color: white;
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
            border: 1px solid #eaeff7;
        }
        
        .download-options h3 {
            font-size: 22px;
            color: #1a3c8b;
            margin-bottom: 25px;
            display: flex;
            align-items: center;
        }
        
        .download-options h3 i {
            margin-right: 12px;
            color: #2a5bd7;
        }
        
        .download-buttons {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-bottom: 30px;
        }
        
        .download-btn {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 25px 15px;
            border-radius: 12px;
            border: 2px solid #eaeff7;
            background-color: #f8fafe;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .download-btn:hover {
            border-color: #2a5bd7;
            background-color: #f0f5ff;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(42, 91, 215, 0.15);
        }
        
        .download-btn .btn-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
            font-size: 26px;
            color: white;
        }
        
        .download-btn .btn-icon.pdf {
            background: linear-gradient(135deg, #e74c3c 0%, #ff6b6b 100%);
        }
        
        .download-btn .btn-icon.word {
            background: linear-gradient(135deg, #2a5bd7 0%, #4a7bf0 100%);
        }
        
        .download-btn .btn-text {
            font-weight: bold;
            font-size: 16px;
            color: #1a3c8b;
            margin-bottom: 5px;
        }
        
        .download-btn .btn-subtext {
            color: #666;
            font-size: 14px;
        }
        
        .download-note {
            background-color: #fff9e6;
            border-left: 4px solid #ffcc00;
            padding: 15px;
            border-radius: 8px;
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }
        
        .download-note i {
            color: #ff9900;
            margin-right: 8px;
        }
        
        /* 文件预览区域 */
        .file-preview {
            background-color: white;
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
            border: 1px solid #eaeff7;
        }
        
        .file-preview h3 {
            font-size: 22px;
            color: #1a3c8b;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
        }
        
        .file-preview h3 i {
            margin-right: 12px;
            color: #2a5bd7;
        }
        
        .preview-area {
            height: 400px;
            background-color: #f8f9fa;
            border-radius: 10px;
            border: 2px dashed #d1d9e6;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: #666;
            margin-bottom: 20px;
        }
        
        .preview-area i {
            font-size: 60px;
            color: #bdc3c7;
            margin-bottom: 15px;
        }
        
        .preview-area p {
            font-size: 16px;
        }
        
        .preview-pages {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: 20px;
        }
        
        .preview-page {
            width: 60px;
            height: 80px;
            background-color: #f8f9fa;
            border: 1px solid #d1d9e6;
            border-radius: 5px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #666;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .preview-page:hover {
            border-color: #2a5bd7;
            background-color: #f0f5ff;
        }
        
        .preview-page.active {
            border-color: #2a5bd7;
            background-color: #e8f0ff;
            color: #2a5bd7;
            font-weight: bold;
        }