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node_modules/vant/es/image-preview/index.less

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+@import '../style/var';
+
+.van-image-preview {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+
+  &__swipe {
+    height: 100%;
+
+    &-item {
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      overflow: hidden;
+    }
+  }
+
+  &__cover {
+    position: absolute;
+    top: 0;
+    left: 0;
+  }
+
+  &__image {
+    width: 100%;
+    transition-property: transform;
+
+    &--vertical {
+      width: auto;
+      height: 100%;
+    }
+
+    img {
+      // disable desktop browser image drag
+      -webkit-user-drag: none;
+    }
+
+    .van-image {
+      &__error {
+        top: 30%;
+        height: 40%;
+      }
+
+      &__error-icon {
+        font-size: 36px;
+      }
+
+      &__loading {
+        background-color: transparent;
+      }
+    }
+  }
+
+  &__index {
+    position: absolute;
+    top: @padding-md;
+    left: 50%;
+    color: @image-preview-index-text-color;
+    font-size: @image-preview-index-font-size;
+    line-height: @image-preview-index-line-height;
+    text-shadow: @image-preview-index-text-shadow;
+    transform: translate(-50%, 0);
+  }
+
+  &__overlay {
+    background-color: @image-preview-overlay-background-color;
+  }
+
+  &__close-icon {
+    position: absolute;
+    z-index: @image-preview-close-icon-z-index;
+    color: @image-preview-close-icon-color;
+    font-size: @image-preview-close-icon-size;
+    cursor: pointer;
+
+    &:active {
+      color: @image-preview-close-icon-active-color;
+    }
+
+    &--top-left {
+      top: @image-preview-close-icon-margin;
+      left: @image-preview-close-icon-margin;
+    }
+
+    &--top-right {
+      top: @image-preview-close-icon-margin;
+      right: @image-preview-close-icon-margin;
+    }
+
+    &--bottom-left {
+      bottom: @image-preview-close-icon-margin;
+      left: @image-preview-close-icon-margin;
+    }
+
+    &--bottom-right {
+      right: @image-preview-close-icon-margin;
+      bottom: @image-preview-close-icon-margin;
+    }
+  }
+}