/* 标题样式，居中显示 */
    .title-container {
        text-align: center;
        margin-bottom: 20px;
    }

    .title-container h1 {
        font-size: 24px;
        color: #333;
    }

    /* 上传容器样式 - 宽度100%无边框 */
    .upload-container {
        width: 100%;
        max-width: 100%; /* 手机端适配：防止溢出 */
        margin: 0 auto 20px;
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }

    /* 拖放区域样式 - 细线风格 */
    .drop-area {
        width: 100%;
        max-width: 100%; /* 手机端适配：防止溢出 */
        border: 1px dashed #ccc;
        border-radius: 2px;
        padding: 40px 20px;
        text-align: center;
        background-color: #fafafa;
        transition: all 0.2s ease;
        cursor: pointer;
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }

    .drop-area:hover {
        background-color: #f5f5f5;
        border-color: #999;
    }

    .drop-area.drag-over {
        background-color: #f0f9ff;
        border-color: #007bff;
    }

    .upload-icon {
        font-size: 40px;
        margin-bottom: 10px;
        opacity: 0.6;
    }

    .upload-icon img {
        width: 48px;
        height: 48px;
        opacity: 1;
        display: inline-block;
        max-width: 100%; /* 手机端适配：防止图片溢出 */
    }

    .drop-area h3 {
        margin: 10px 0;
        color: #333;
        font-size: 16px;
        font-weight: 500;
        word-wrap: break-word; /* 手机端适配：长文本换行 */
    }

    .upload-hint {
        color: #888;
        font-size: 12px;
        margin-bottom: 20px;
    }

    /* 文件信息样式 - 细线风格 */
    .file-info {
        width: 100%;
        max-width: 100%; /* 手机端适配：防止溢出 */
        margin-top: 10px;
        padding: 12px 15px;
        background-color: #f8f9fa;
        border: 1px solid #e9ecef;
        border-radius: 2px;
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }

    .file-info-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
        max-width: 100%; /* 手机端适配：防止溢出 */
    }

    .file-icon {
        font-size: 20px;
        margin-right: 10px;
        opacity: 0.7;
        flex-shrink: 0; /* 手机端适配：防止图标被压缩 */
    }

    .file-name {
        flex: 1;
        font-weight: 400;
        color: #495057;
        font-size: 14px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        min-width: 0; /* 手机端适配：允许文本截断 */
    }

    .remove-button {
        background: none;
        border: none;
        font-size: 20px;
        color: #6c757d;
        cursor: pointer;
        padding: 0 8px;
        line-height: 1;
        width: 24px;
        height: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 2px;
        flex-shrink: 0; /* 手机端适配：防止按钮被压缩 */
    }

    .remove-button:hover {
        background-color: #f8f9fa;
        color: #dc3545;
    }

    /* 图片格式选择 */
    .format-container {
        width: 100%;
        max-width: 100%; /* 手机端适配：防止溢出 */
        margin: 0 auto 20px;
        text-align: center;
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }
    
    .format-container label {
        font-weight: 400;
        margin-right: 10px;
        color: #495057;
        font-size: 14px;
    }
    
    .format-container input[type="radio"] {
        margin: 0 5px 0 15px;
    }

    .radio-label {
        cursor: pointer;
    }

    .format-container input[type="radio"]:first-of-type {
        margin-left: 0;
    }

    /* 按钮样式 - 细线风格 */
    .button {
        padding: 10px 30px;
        background-color: #f8f9fa;
        color: #495057;
        border: 1px solid #dee2e6;
        border-radius: 2px;
        cursor: pointer;
        font-size: 14px;
        transition: all 0.2s;
        font-weight: 400;
        min-width: 120px;
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }

    .button:hover {
        background-color: #e9ecef;
        border-color: #adb5bd;
        transform: translateY(-1px);
    }

    .button:active {
        transform: translateY(0);
    }

    .button:disabled {
        background-color: #f8f9fa;
        color: #adb5bd;
        border-color: #e9ecef;
        cursor: not-allowed;
        transform: none;
    }

    /* 转换按钮容器 */
    .button-container {
        width: 100%;
        max-width: 100%; /* 手机端适配：防止溢出 */
        margin: 0 auto 20px;
        text-align: center;
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }

    /* 进度条容器 */
    .progress-container {
        width: 100%;
        max-width: 100%; /* 手机端适配：防止溢出 */
        margin: 0 auto 20px;
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }

    .progress-container label {
        display: block;
        font-weight: 400;
        margin-bottom: 8px;
        color: #495057;
        font-size: 14px;
    }

    progress {
        width: 100%;
        max-width: 100%; /* 手机端适配：防止溢出 */
        height: 4px;
        border: none;
        background-color: #f8f9fa;
        border-radius: 1px;
    }

    progress::-webkit-progress-bar {
        background-color: #f8f9fa;
        border-radius: 1px;
    }

    progress::-webkit-progress-value {
        background-color: #007bff;
        border-radius: 1px;
        transition: width 0.3s ease;
    }

    progress::-moz-progress-bar {
        background-color: #007bff;
        border-radius: 1px;
    }

    .progress-text {
        display: block;
        margin-top: 5px;
        font-weight: 400;
        color: #6c757d;
        font-size: 12px;
    }

    /* 预览区域 */
    .preview-container {
        width: 100%;
        max-width: 100%; /* 手机端适配：防止溢出 */
        margin: 20px auto;
        display: none;
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }

    .preview-container h3 {
        font-size: 16px;
        font-weight: 500;
        color: #333;
        margin-bottom: 15px;
        padding-bottom: 8px;
        border-bottom: 1px solid #e9ecef;
    }

    .preview-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
        margin-top: 10px;
        max-width: 100%; /* 手机端适配：防止溢出 */
    }

    .preview-item {
        border: 1px solid #e9ecef;
        border-radius: 2px;
        overflow: hidden;
        background: white;
        transition: all 0.2s ease;
        max-width: 100%; /* 手机端适配：防止溢出 */
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }

    .preview-item:hover {
        border-color: #adb5bd;
        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }

    .preview-image {
        width: 100%;
        height: 150px;
        object-fit: cover;
        display: block;
        background-color: #f8f9fa;
        max-width: 100%; /* 手机端适配：防止图片溢出 */
    }

    .preview-info {
        padding: 10px;
        text-align: center;
        max-width: 100%; /* 手机端适配：防止溢出 */
    }

    .preview-name {
        font-size: 12px;
        color: #495057;
        margin-bottom: 8px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .preview-download-btn {
        width: 100%;
        padding: 6px 0;
        background-color: #f8f9fa;
        color: #495057;
        border: 1px solid #dee2e6;
        border-radius: 2px;
        font-size: 12px;
        cursor: pointer;
        transition: all 0.2s;
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }

    .preview-download-btn:hover {
        background-color: #e9ecef;
        border-color: #adb5bd;
    }

    /* 下载按钮容器 */
    .download-container {
        width: 100%;
        max-width: 100%; /* 手机端适配：防止溢出 */
        margin: 0 auto;
        text-align: center;
        box-sizing: border-box; /* 手机端适配：包含内边距 */
    }

    .download-all-btn {
        background-color: #28a745;
        color: white;
        border: 1px solid #28a745;
    }

    .download-all-btn:hover {
        background-color: #218838;
        border-color: #1e7e34;
    }

    /* 响应式设计：适应手机端 */
    @media (max-width: 768px) {
        .drop-area {
            padding: 30px 15px;
        }

        .drop-area h3 {
            font-size: 14px;
        }

        .upload-icon {
            font-size: 32px;
        }

        .upload-icon img {
            width: 40px; /* 手机端适配：缩小图标 */
            height: 40px;
        }

        .button {
            width: 100%;
            max-width: 100%; /* 手机端适配：按钮不溢出 */
            padding: 12px;
        }

        .preview-grid {
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        }

        .file-info {
            padding: 10px;
        }

        .file-name {
            font-size: 13px;
        }
        
        /* 手机端适配：格式选择换行 */
        .format-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px;
        }
        
        .format-container label:first-of-type {
            width: 100%;
            margin-bottom: 5px;
        }
    }

    @media (max-width: 480px) {
        .preview-grid {
            grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        }
        
        .preview-image {
            height: 120px;
        }
        
        /* 手机端适配：文件信息布局优化 */
        .file-info-content {
            flex-wrap: nowrap;
        }
        
        .file-name {
            max-width: 200px; /* 限制文件名显示长度 */
        }
    }
    
    /* 超小屏幕适配（小于360px） */
    @media (max-width: 360px) {
        .upload-icon img {
            width: 36px;
            height: 36px;
        }
        
        .drop-area h3 {
            font-size: 13px;
        }
        
        .preview-grid {
            grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
            gap: 10px;
        }
        
        .preview-image {
            height: 100px;
        }
        
        .file-name {
            max-width: 150px; /* 进一步限制文件名 */
        }
        
        /* 手机端适配：格式选择更紧凑 */
        .format-container {
            gap: 5px;
        }
        
        .format-container label {
            font-size: 13px;
        }
        
        .radio-label {
            font-size: 13px;
        }
    }