.cr2conv-core {
            width: 100%;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }
        
        .cr2conv-core * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        .cr2conv-upload {
            width: 100%;
            border: 1px dashed #ccc;
            background: #fff;
            text-align: center;
            padding: 40px 20px;
            cursor: pointer;
            transition: border-color 0.2s, background 0.2s;
        }
        .cr2conv-upload:hover { border-color: #999; background: #fafafa; }
        .cr2conv-upload.dragover { border-color: #666; background: #f0f0f0; }
        .cr2conv-upload-icon { width: 48px; height: 48px; margin: 0 auto 12px; color: #999; }
        .cr2conv-upload-text { color: #666; font-size: 14px; }
        .cr2conv-upload-hint { color: #999; font-size: 12px; margin-top: 8px; }
        .cr2conv-file-input { display: none; }
        
        .cr2conv-list {
            width: 100%;
            column-count: 4;
            column-gap: 16px;
            margin-top: 16px;
        }
        @media (max-width: 1200px) { .cr2conv-list { column-count: 3; } }
        @media (max-width: 900px) { .cr2conv-list { column-count: 2; } }
        @media (max-width: 500px) { .cr2conv-list { column-count: 1; } }
        
        .cr2conv-item {
            width: 100%;
            border: 1px solid #e0e0e0;
            background: #fff;
            break-inside: avoid;
            margin-bottom: 16px;
        }
        .cr2conv-item-imgwrap {
            width: 100%;
            background: #f0f0f0;
            overflow: hidden;
        }
        .cr2conv-item-imgwrap img {
            width: 100%;
            height: auto;
            display: block;
        }
        .cr2conv-item-name {
            padding: 10px 12px;
            font-size: 13px;
            color: #333;
            border-top: 1px solid #e0e0e0;
            word-break: break-all;
            line-height: 1.4;
        }
        .cr2conv-item-btns {
            display: flex;
            border-top: 1px solid #e0e0e0;
        }
        .cr2conv-item-btn {
            flex: 1;
            padding: 10px;
            font-size: 13px;
            color: #666;
            background: #fff;
            border: none;
            border-right: 1px solid #e0e0e0;
            cursor: pointer;
            transition: background 0.2s;
            text-decoration: none;
            display: block;
            text-align: center;
        }
        .cr2conv-item-btn:last-child { border-right: none; }
        .cr2conv-item-btn:hover { background: #f5f5f5; }
        
        .cr2conv-loading {
            width: 100%;
            border: 1px solid #e0e0e0;
            background: #fff;
            padding: 30px;
            text-align: center;
        }
        .cr2conv-spinner {
            width: 24px;
            height: 24px;
            border: 2px solid #e0e0e0;
            border-top-color: #666;
            border-radius: 50%;
            animation: cr2conv-spin 0.8s linear infinite;
            margin: 0 auto 10px;
        }
        @keyframes cr2conv-spin { to { transform: rotate(360deg); } }
        .cr2conv-loading-text { font-size: 13px; color: #666; }
        
        .cr2conv-error {
            width: 100%;
            border: 1px solid #f0c0c0;
            background: #fff5f5;
            padding: 20px;
            text-align: center;
        }
        .cr2conv-error-text { font-size: 13px; color: #c00; }
        
        .cr2conv-libtip {
            width: 100%;
            border: 1px solid #d0d0f0;
            background: #f5f5ff;
            padding: 15px;
            text-align: center;
            margin-top: 16px;
        }
        .cr2conv-libtip-text { font-size: 13px; color: #666; }
        
        .cr2conv-info {
            width: 100%;
            border: 1px solid #e0e0e0;
            background: #fff;
            padding: 24px;
            margin-top: 24px;
        }
        .cr2conv-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: #333;
            margin-top: 20px;
            margin-bottom: 8px;
        }
        .cr2conv-info h3:first-child { margin-top: 0; }
        .cr2conv-info p {
            font-size: 14px;
            color: #666;
            line-height: 1.5;
            margin-bottom: 12px;
        }