.drag-area {
            border: 2px dashed #3b82f6;
            background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
            transition: all 0.3s ease;
        }

        .drag-area.dragover {
            border-color: #2563eb;
            background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
            transform: scale(1.02);
        }

        .frame-item {
            background: white;
            border-radius: 0.375rem;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            cursor: move;
        }

        .frame-item.dragging {
            opacity: 0.5;
            transform: rotate(5deg);
        }

        .frame-item.drag-over {
            border: 2px dashed #3b82f6;
        }

        .file-item {
            background: white;
            border-radius: 0.375rem; /* rounded-md */
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }

        .file-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }

        .progress-bar-container {
            height: 0.5rem; /* h-2 */
            overflow: hidden;
            border-radius: 9999px;
            background-color: #e5e7eb;
        }

        .progress-bar {
            height: 100%;
            min-height: 100%;
            border-radius: 9999px;
            background: linear-gradient(90deg, #3b82f6, #8b5cf6);
            transition: width 0.3s ease;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }

        .processing {
            animation: pulse 1.5s ease-in-out infinite;
        }

        .gif-preview {
            max-width: 100%;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }

        .time-slider {
            -webkit-appearance: none;
            appearance: none;
            height: 6px;
            border-radius: 3px;
            background: #e5e7eb;
            outline: none;
        }

        .time-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #3b82f6;
            cursor: pointer;
            box-shadow: 0 2px 6px rgba(59, 130, 246, 0.3);
        }

        .time-slider::-moz-range-thumb {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #3b82f6;
            cursor: pointer;
            border: none;
            box-shadow: 0 2px 6px rgba(59, 130, 246, 0.3);
        }

        .sortable-ghost {
            opacity: 0.3;
            background: #f3f4f6;
            border: 2px dashed #3b82f6;
        }

        .sortable-chosen {
            transform: scale(1.05);
            box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
        }

        .sortable-drag {
            opacity: 0.8;
            transform: rotate(5deg);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        /* 滑块样式 */
        .slider {
            -webkit-appearance: none;
            appearance: none;
            height: 6px;
            border-radius: 3px;
            background: #e5e7eb;
            outline: none;
        }

        .slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: #3b82f6;
            cursor: pointer;
            box-shadow: 0 2px 4px rgba(59, 130, 246, 0.3);
        }

        .slider::-moz-range-thumb {
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: #3b82f6;
            cursor: pointer;
            border: none;
            box-shadow: 0 2px 4px rgba(59, 130, 246, 0.3);
        }

        /* 卡片悬停效果 */
        .bg-white {
            transition: all 0.3s ease;
        }