.gulu-dialog {
  position: fixed;
  background: white;
  min-width: 20em;
  border-radius: 4px;
  top: 100px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 101;
  animation: Spread .3s;
  box-shadow: 0 3px 6px -4px rgba(0, 0, 0, 0.12), 0 6px 16px 0 rgba(0, 0, 0, 0.08), 0 9px 28px 8px rgba(0, 0, 0, 0.05);
  width: 480px;
  &-mask {position: fixed;top: 0;left: 0;height: 100%;width: 100%;
    background: fade_out(black, 0.5);
    z-index: 100;
  }
  &-header {
    font-size: 16px;
    padding: 8px 16px;
    border-bottom: 1px #cccccc solid;
  }
  &-main {
    min-height: 6em;
    padding: 16px;
  }
  &-footer {
    border-top: 1px solid #cccccc ;
    padding: 8px 16px;
    display: flex;
    justify-content: flex-end;
    button:first-child {
      margin-right: 5px;
    }
  }
  &-close {
    position: absolute;
    bottom: 100%;
    right: 10px;
    background: white;
    width: 1.5em;
    height: 1.5em;
    border-radius: 50%;
    transform: translateY(150%);
    display: flex;
    justify-content: center;
    align-items: center;
    color: black;
    cursor: pointer;
    transition: all 150ms linear;
    &:hover {
      background: #db4e2b;
      color: white;
    }
  }
}
@keyframes Spread {
  0% {
    opacity: 0;
    // 之所以要再加translateY(-50%)，是为了防止动画抖动
    transform: translateX(-50%) scale(0);
  }
  100% {
    opacity: 1;
    transform: translateX(-50%) scale(1);
  }
}