amis/scss/components/_modal.scss

.is-modalOpened {
  overflow: hidden;

  .#{$ns}Modal {
    overflow-x: hidden;
    overflow-y: auto;
  }
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translate3d(0, -300px, 0) scale(0.2);
  }
}

@keyframes modalOut {
  to {
    opacity: 0;
    transform: translate3d(0, -300px, 0) scale(0.2);
  }
}

.#{$ns}Modal {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: $zindex-modal;
  overflow: hidden;
  outline: 0;

  &-content {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%; // Ensure `.modal-content` extends the full width of the parent `.modal-dialog`
    min-height: $Modal-content-minHeight;
    pointer-events: auto;
    background-color: $Modal-bg;
    background-clip: padding-box;
    outline: 0;
    z-index: 2;
    margin-left: auto;
    margin-right: auto;
    margin-top: $Modal-content-startMarginTop;
    margin-bottom: $gap-md;
    border: $Modal-content-borderWidth solid $Modal-content-borderColor;
    border-radius: $Modal-content-borderRadius;

    // transition: ease-out all 0.3s;
    // transform: translateY(-300px) scale(0.2);
    // opacity: 0;

    &.in,
    &.out {
      // opacity: 1;
      // transform: translateY(0) scale(1);
      animation-duration: 0.35s;
      animation-fill-mode: both;
    }

    &.in {
      animation-name: modalIn;
    }

    &.out {
      animation-name: modalOut;
    }
  }

  &-overlay {
    transition: ease-in-out opacity 0.5s;
    // transition-delay: 0.2s;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1;
    background-color: $Modal-overlay-bg;
    pointer-events: none; // 很重要，如果不设置，弹框虽然滚轮可滚，但是鼠标没办法操作滚动条。
    opacity: 0;

    &.in {
      opacity: 1;
    }

    &.out {
      opacity: 0;
    }
  }

  &-header {
    padding: $Modal-header-paddingY $Modal-header-paddingX;
    background-color: $Modal-header-bg;
    @include clearfix();
    border-bottom: $Modal-body-borderTop;

    @if $Modal-content-borderRadius {
      border-top-left-radius: $Modal-content-borderRadius;
      border-top-right-radius: $Modal-content-borderRadius;
    }
  }

  &-title {
    font-size: $Modal-title-fontSize;
    color: $Modal-title-color;
  }

  &-close {
    float: right;
    color: $Modal-close-color;
    line-height: inherit;
    text-decoration: none;
    vertical-align: middle;

    svg {
      width: $Modal-close-width;
      height: $Modal-close-width;
      fill: $Modal-close-color;
    }

    &:not(.is-disabled) {
      cursor: pointer;

      &:hover {
        text-decoration: none;
        color: $Model-close-onHover-color;

        svg {
          fill: $Model-close-onHover-color;
        }
      }
    }
  }

  &-content > &-close {
    position: absolute;
    right: $gap-md;
    top: $gap-sm;
    z-index: 10;
  }

  &-body {
    padding: $Modal-body--noHeader-paddingTop $Modal-body-paddingX
      $Modal-body-paddingY;
    flex-basis: 0;
    flex-grow: 1;
  }

  &-header + &-body {
    padding-top: $Modal-body-paddingY;
  }

  &-footer {
    // @include clearfix();
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: $Modal-footer-padding;
    border-top: $Modal-body-borderBottom;
    margin: $Modal-footer-marginY $Modal-footer-marginX;

    @if $Modal-content-borderRadius {
      border-bottom-left-radius: $Modal-content-borderRadius;
      border-bottom-right-radius: $Modal-content-borderRadius;
    }

    .#{$ns}Button {
      margin-left: $gap-sm;
    }
  }
}

@for $i from (2) through 10 {
  .#{$ns}Modal--#{$i}th {
    .#{$ns}Modal-content {
      margin-top: $Modal-content-startMarginTop +
        ($i - 1) *
        $Modal-content-stepMarginTop;
    }
  }
}

@include media-breakpoint-up(sm) {
  .#{$ns}Modal-content {
    max-width: $Modal-widthBase;
  }

  .#{$ns}Modal--sm .#{$ns}Modal-content {
    max-width: $Modal-widthSm;
  }

  .#{$ns}Modal--base .#{$ns}Modal-content {
    max-width: $Modal-widthBase;
  }

  .#{$ns}Modal--md .#{$ns}Modal-content {
    max-width: $Modal-widthMd;
  }

  .#{$ns}Modal--lg .#{$ns}Modal-content {
    max-width: $Modal-widthLg;
  }

  .#{$ns}Modal--xl .#{$ns}Modal-content {
    max-width: $Modal-widthXl;
  }
}

.#{$ns}Dialog-info {
  flex-basis: 0;
  flex-grow: 1;
  text-align: left;
}

.#{$ns}Dialog-error {
  color: $danger;
}

.#{$ns}Modal--full {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;

  > .#{$ns}Modal-content {
    flex-basis: 0;
    flex-grow: 1;
    margin: 30px;
    width: calc(100% - 60px);
    max-width: unset;

    > .#{$ns}Modal-body {
      height: 0;
      overflow: auto;
    }
  }
}