/* 自定义样式补充 */
input[type="range"] {
    -webkit-appearance: none;
    height: 8px;
    background: #e5e7eb;
    border-radius: 5px;
    background-image: linear-gradient(#3b82f6, #3b82f6);
    background-repeat: no-repeat;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: #3b82f6;
    cursor: pointer;
    box-shadow: 0 0 2px 0 #555;
}

input[type="range"]::-moz-range-thumb {
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: #3b82f6;
    cursor: pointer;
    box-shadow: 0 0 2px 0 #555;
}

/* 拖拽上传区域样式 */
.drag-over {
    background-color: rgba(59, 130, 246, 0.1);
    border-color: #3b82f6 !important;
}

/* 预览区域样式 */
#previewCanvas {
    max-height: 350px;
    object-fit: contain;
}