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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            color: #333;
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 20px;
            min-height: 100vh;
        }

        .header {
            text-align: center;
            margin-bottom: 30px;
            color: white;
        }

        .header h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }

        .header p {
            font-size: 1.1rem;
            opacity: 0.9;
        }

        .version-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.2);
            color: white;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            margin-left: 10px;
            backdrop-filter: blur(10px);
        }

        .main-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 20px;
            margin-bottom: 30px;
        }

        .main-card {
            background: white;
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.1);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255,255,255,0.2);
        }

        .sidebar {
            background: white;
            border-radius: 20px;
            padding: 25px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.1);
            height: fit-content;
            position: sticky;
            top: 20px;
        }

        .sidebar h3 {
            color: #333;
            margin-bottom: 20px;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-section {
            margin-bottom: 25px;
            padding-bottom: 20px;
            border-bottom: 1px solid #eee;
        }

        .sidebar-section:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }

        .upload-area {
            border: 3px dashed #667eea;
            border-radius: 15px;
            padding: 60px 20px;
            text-align: center;
            transition: all 0.3s ease;
            background: linear-gradient(135deg, #f8f9ff, #f0f1ff);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }

        .upload-area::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
            transition: left 0.5s;
        }

        .upload-area:hover::before {
            left: 100%;
        }

        .upload-area:hover {
            border-color: #764ba2;
            background: linear-gradient(135deg, #f0f1ff, #e8e9ff);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
        }

        .upload-area.dragover {
            border-color: #4CAF50;
            background: linear-gradient(135deg, #e8f5e8, #d4edda);
            transform: scale(1.02);
        }

        .upload-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 20px;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" fill="%23667eea" viewBox="0 0 24 24"><path d="M14,2H6A2,2 0 0,0 4,4V20A2,2 0 0,0 6,22H18A2,2 0 0,0 20,20V8L14,2M18,20H6V4H13V9H18V20Z"/></svg>') center/contain no-repeat;
            animation: float 3s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
        }

        .upload-text {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: #667eea;
            font-weight: 600;
        }

        .upload-hint {
            color: #999;
            font-size: 0.9rem;
        }

        #file {
            display: none;
        }

        .controls {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }

        .control-group {
            background: linear-gradient(135deg, #f8f9ff, #f0f1ff);
            padding: 20px;
            border-radius: 12px;
            border: 1px solid #e1e5e9;
            transition: all 0.3s ease;
        }

        .control-group:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.1);
        }

        .control-label {
            display: block;
            font-weight: 600;
            margin-bottom: 8px;
            color: #555;
            font-size: 0.9rem;
        }

        .control-input, .control-select {
            width: 100%;
            padding: 12px;
            border: 2px solid #e1e5e9;
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background: white;
        }

        .control-input:focus, .control-select:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
            transform: translateY(-1px);
        }

        .batch-actions {
            display: flex;
            gap: 15px;
            margin: 20px 0;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

        .batch-left {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .batch-right {
            display: flex;
            gap: 15px;
            align-items: center;
        }

        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            position: relative;
            overflow: hidden;
            white-space: nowrap;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
            transition: left 0.5s;
        }

        .btn:hover::before {
            left: 100%;
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none !important;
        }

        .btn:disabled:hover::before {
            left: -100%;
        }

        .btn-primary {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
        }

        .btn-primary:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
        }

        .btn-secondary {
            background: linear-gradient(135deg, #f8f9ff, #e8e9ff);
            color: #667eea;
            border: 2px solid #667eea;
        }

        .btn-secondary:hover:not(:disabled) {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            transform: translateY(-2px);
        }

        .btn-success {
            background: linear-gradient(135deg, #4CAF50, #45a049);
            color: white;
        }

        .btn-success:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(76, 175, 80, 0.3);
        }

        .btn-danger {
            background: linear-gradient(135deg, #f44336, #d32f2f);
            color: white;
        }

        .btn-danger:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(244, 67, 54, 0.3);
        }

        .btn-small {
            padding: 8px 16px;
            font-size: 0.9rem;
        }

        .selection-controls {
            display: flex;
            gap: 15px;
            align-items: center;
            flex-wrap: wrap;
        }

        .btn-select-all,
        .btn-deselect-all,
        .btn-delete-selected {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: #667eea;
            cursor: pointer;
            transition: all 0.3s ease;
            padding: 10px 16px;
            border-radius: 8px;
            background: rgba(102, 126, 234, 0.1);
            border: 2px solid rgba(102, 126, 234, 0.2);
        }

        .btn-select-all:hover,
        .btn-deselect-all:hover {
            color: #764ba2;
            background: rgba(102, 126, 234, 0.2);
            border-color: rgba(102, 126, 234, 0.4);
            transform: translateY(-1px);
        }

        .btn-delete-selected {
            color: #f44336;
            background: rgba(244, 67, 54, 0.1);
            border-color: rgba(244, 67, 54, 0.2);
        }

        .btn-delete-selected:hover {
            color: #d32f2f;
            background: rgba(244, 67, 54, 0.2);
            border-color: rgba(244, 67, 54, 0.4);
            transform: translateY(-1px);
        }

        .btn-select-all svg,
        .btn-deselect-all svg,
        .btn-delete-selected svg {
            width: 16px;
            height: 16px;
            fill: currentColor;
        }

        /* 新增功能样式 */
        .quick-presets {
            display: grid;
            gap: 10px;
        }

        .preset-btn {
            padding: 10px;
            background: #f8f9ff;
            border: 2px solid #e1e5e9;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: left;
            font-size: 0.9rem;
        }

        .preset-btn:hover {
            border-color: #667eea;
            background: #f0f1ff;
        }

        .preset-btn.active {
            border-color: #667eea;
            background: #667eea;
            color: white;
        }

        .preset-name {
            font-weight: 600;
            margin-bottom: 4px;
        }

        .preset-desc {
            font-size: 0.8rem;
            opacity: 0.8;
        }

        .filter-controls {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
            align-items: center;
            flex-wrap: wrap;
        }

        .filter-input {
            flex: 1;
            min-width: 200px;
            padding: 10px;
            border: 2px solid #e1e5e9;
            border-radius: 8px;
            font-size: 0.9rem;
        }

        .filter-input:focus {
            outline: none;
            border-color: #667eea;
        }

        .view-toggle {
            display: flex;
            background: #f8f9ff;
            border-radius: 8px;
            padding: 4px;
            gap: 4px;
        }

        .view-btn {
            padding: 8px 12px;
            border: none;
            background: transparent;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .view-btn.active {
            background: #667eea;
            color: white;
        }

        .sort-controls {
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .sort-select {
            padding: 8px 12px;
            border: 2px solid #e1e5e9;
            border-radius: 6px;
            font-size: 0.9rem;
        }

        .preview-area {
            margin-top: 30px;
        }

        .preview-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            flex-wrap: wrap;
            gap: 15px;
        }

        .preview-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .preview-grid.list-view {
            grid-template-columns: 1fr;
        }

        .preview-item {
            background: white;
            border-radius: 15px;
            padding: 15px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            position: relative;
            border: 3px solid transparent;
            overflow: hidden;
        }

        .preview-item.list-view {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 15px 20px;
        }

        .preview-item.list-view .preview-image {
            width: 80px;
            height: 80px;
            flex-shrink: 0;
        }

        .preview-item.list-view .preview-info {
            flex: 1;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 20px;
            align-items: center;
        }

        .preview-item.list-view .preview-actions {
            position: static;
            flex-direction: row;
            opacity: 1;
            transform: none;
        }

        .preview-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }

        .preview-item.list-view:hover {
            transform: none;
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
        }

        .preview-item.selected {
            border-color: #4CAF50;
            box-shadow: 0 8px 25px rgba(76, 175, 80, 0.3);
        }

        .preview-item.selected::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(76, 175, 80, 0.1);
            z-index: 1;
            pointer-events: none;
        }

        .preview-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 10px;
            margin-bottom: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .preview-image:hover {
            transform: scale(1.02);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        .preview-info {
            font-size: 0.9rem;
            color: #666;
            position: relative;
            z-index: 2;
        }

        .preview-name {
            font-weight: 600;
            margin-bottom: 8px;
            color: #333;
            word-break: break-all;
            font-size: 1rem;
        }

        .preview-stats {
            display: flex;
            justify-content: space-between;
            margin: 8px 0;
            font-size: 0.85rem;
        }

        .preview-details {
            margin: 8px 0;
            font-size: 0.85rem;
        }

        .preview-actions {
            position: absolute;
            top: 15px;
            right: 15px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            opacity: 0.8;
            transition: all 0.3s ease;
            z-index: 10;
        }

        .preview-item:hover .preview-actions {
            opacity: 1;
            transform: translateX(-5px);
        }

        .btn-preview-action {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            transition: all 0.3s ease;
            backdrop-filter: blur(20px);
            border: 2px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }

        .btn-preview-action:hover {
            transform: scale(1.15);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }

        .btn-preview-action svg {
            width: 20px;
            height: 20px;
        }

        .btn-preview-select {
            background: linear-gradient(135deg, rgba(76, 175, 80, 0.9), rgba(56, 142, 60, 0.9));
        }

        .btn-preview-select:hover {
            background: linear-gradient(135deg, #4CAF50, #388E3C);
        }

        .btn-preview-select svg {
            fill: white;
        }

        .btn-preview-download {
            background: linear-gradient(135deg, rgba(33, 150, 243, 0.9), rgba(25, 118, 210, 0.9));
        }

        .btn-preview-download:hover {
            background: linear-gradient(135deg, #2196F3, #1976D2);
        }

        .btn-preview-download svg {
            fill: white;
        }

        .btn-preview-delete {
            background: linear-gradient(135deg, rgba(244, 67, 54, 0.9), rgba(211, 47, 47, 0.9));
        }

        .btn-preview-delete:hover {
            background: linear-gradient(135deg, #f44336, #d32f2f);
        }

        .btn-preview-delete svg {
            fill: white;
        }

        .btn-preview-edit {
            background: linear-gradient(135deg, rgba(255, 152, 0, 0.9), rgba(245, 124, 0, 0.9));
        }

        .btn-preview-edit:hover {
            background: linear-gradient(135deg, #FF9800, #F57C00);
        }

        .btn-preview-edit svg {
            fill: white;
        }

        .stats {
            background: linear-gradient(135deg, #4CAF50, #45a049);
            color: white;
            padding: 25px;
            border-radius: 20px;
            text-align: center;
            margin-top: 20px;
            backdrop-filter: blur(10px);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 20px;
            margin-top: 15px;
        }

        .stat-item {
            text-align: center;
            padding: 10px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
        }

        .stat-value {
            font-size: 2rem;
            font-weight: bold;
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.9rem;
            opacity: 0.9;
        }

        .progress-bar {
            width: 100%;
            height: 8px;
            background: rgba(255, 255, 255, 0.3);
            border-radius: 4px;
            margin: 10px 0;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: #4CAF50;
            width: 0%;
            transition: width 0.3s ease;
            border-radius: 4px;
        }

        .toast {
            position: fixed;
            top: 20px;
            right: 20px;
            background: #4CAF50;
            color: white;
            padding: 15px 20px;
            border-radius: 10px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.2);
            transform: translateX(100%);
            transition: transform 0.3s ease;
            z-index: 1000;
            backdrop-filter: blur(10px);
            max-width: 300px;
        }

        .toast.show {
            transform: translateX(0);
        }

        .toast.error {
            background: #f44336;
        }

        .toast.info {
            background: #2196F3;
        }

        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.95);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 2000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            backdrop-filter: blur(20px);
        }

        .modal-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        .modal-content {
            position: relative;
            max-width: 95vw;
            max-height: 95vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            transform: scale(0.8);
            transition: transform 0.3s ease;
        }

        .modal-overlay.show .modal-content {
            transform: scale(1);
        }

        .modal-header {
            position: absolute;
            top: -60px;
            left: 0;
            right: 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: white;
            z-index: 10;
        }

        .modal-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 0;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
        }

        .modal-close {
            width: 50px;
            height: 50px;
            border: none;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

        .modal-close:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: scale(1.1);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
        }

        .modal-close svg {
            width: 24px;
            height: 24px;
            fill: white;
        }

        .modal-image {
            max-width: 100%;
            max-height: 85vh;
            object-fit: contain;
            border-radius: 15px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        }

        .modal-actions {
            position: absolute;
            bottom: -60px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 15px;
        }

        .modal-download-btn {
            padding: 12px 24px;
            background: linear-gradient(135deg, #2196F3, #1976D2);
            color: white;
            border: none;
            border-radius: 25px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 8px 25px rgba(33, 150, 243, 0.3);
        }

        .modal-download-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 35px rgba(33, 150, 243, 0.4);
        }

        .selection-counter {
            background: rgba(102, 126, 234, 0.1);
            color: #667eea;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            border: 2px solid rgba(102, 126, 234, 0.2);
        }

        /* 下载进度相关样式 */
        .download-progress {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: white;
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            min-width: 300px;
            z-index: 1500;
            transform: translateY(100%);
            transition: transform 0.3s ease;
        }

        .download-progress.show {
            transform: translateY(0);
        }

        .download-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
        }

        .download-title {
            font-weight: 600;
            color: #333;
        }

        .download-close {
            width: 30px;
            height: 30px;
            border: none;
            background: rgba(0, 0, 0, 0.1);
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: all 0.3s ease;
        }

        .download-close:hover {
            background: rgba(0, 0, 0, 0.2);
        }

        .download-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            border-bottom: 1px solid #eee;
        }

        .download-item:last-child {
            border-bottom: none;
        }

        .download-status {
            font-size: 0.9rem;
            color: #666;
        }

        .download-filename {
            flex: 1;
            font-size: 0.85rem;
            color: #333;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .status-downloading {
            color: #2196F3;
        }

        .status-completed {
            color: #4CAF50;
        }

        .status-error {
            color: #f44336;
        }

        /* 编辑模态框样式 */
        .edit-modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.9);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 2500;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .edit-modal.show {
            opacity: 1;
            visibility: visible;
        }

        .edit-modal-content {
            background: white;
            border-radius: 20px;
            padding: 30px;
            max-width: 800px;
            width: 90%;
            max-height: 90vh;
            overflow-y: auto;
            transform: scale(0.8);
            transition: transform 0.3s ease;
        }

        .edit-modal.show .edit-modal-content {
            transform: scale(1);
        }

        .edit-modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 2px solid #eee;
        }

        .edit-form {
            display: grid;
            gap: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-label {
            font-weight: 600;
            color: #333;
        }

        .form-input {
            padding: 12px;
            border: 2px solid #e1e5e9;
            border-radius: 8px;
            font-size: 1rem;
        }

        .form-input:focus {
            outline: none;
            border-color: #667eea;
        }

        .edit-preview {
            display: flex;
            gap: 20px;
            align-items: center;
            margin: 20px 0;
            padding: 20px;
            background: #f8f9ff;
            border-radius: 15px;
        }

        .edit-preview img {
            width: 150px;
            height: 150px;
            object-fit: cover;
            border-radius: 10px;
        }

        .edit-actions {
            display: flex;
            gap: 15px;
            justify-content: flex-end;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 2px solid #eee;
        }

        @media (max-width: 1024px) {
            .main-layout {
                grid-template-columns: 1fr;
            }
            
            .sidebar {
                position: static;
                order: -1;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 10px;
            }
            
            .header h1 {
                font-size: 2rem;
            }
            
            .main-card, .sidebar {
                padding: 20px;
            }
            
            .upload-area {
                padding: 40px 20px;
            }
            
            .controls {
                grid-template-columns: 1fr;
            }
            
            .batch-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .batch-left,
            .batch-right {
                justify-content: center;
            }

            .selection-controls {
                justify-content: center;
                flex-wrap: wrap;
            }

            .preview-grid {
                grid-template-columns: 1fr;
            }

            .preview-actions {
                position: relative;
                top: auto;
                right: auto;
                flex-direction: row;
                justify-content: center;
                margin-top: 10px;
                opacity: 1;
                transform: none;
            }

            .preview-item:hover .preview-actions {
                transform: none;
            }

            .modal-header {
                position: static;
                background: rgba(0, 0, 0, 0.8);
                padding: 15px;
                border-radius: 10px 10px 0 0;
                margin-bottom: 10px;
            }

            .modal-actions {
                position: static;
                transform: none;
                margin-top: 15px;
                background: rgba(0, 0, 0, 0.8);
                padding: 15px;
                border-radius: 0 0 10px 10px;
            }

            .modal-content {
                background: rgba(0, 0, 0, 0.8);
                border-radius: 15px;
                padding: 0;
                margin: 20px;
            }

            .download-progress {
                left: 10px;
                right: 10px;
                bottom: 10px;
                min-width: auto;
            }

            .filter-controls {
                flex-direction: column;
                align-items: stretch;
            }

            .view-toggle {
                justify-content: center;
            }
        }

        .hidden {
            display: none;
        }

        .fade-in {
            animation: fadeIn 0.5s ease-in;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* 新增功能按钮样式 */
        .feature-btn {
            width: 100%;
            padding: 12px;
            margin-bottom: 10px;
            border: 2px solid #e1e5e9;
            border-radius: 8px;
            background: #f8f9ff;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            font-weight: 600;
        }

        .feature-btn:hover {
            border-color: #667eea;
            background: #f0f1ff;
            transform: translateY(-1px);
        }

        .feature-btn svg {
            width: 18px;
            height: 18px;
            fill: #667eea;
        }