Platform/src/styles/_element_plus.scss

/* 只需要覆盖你需要的变量 */
@forward "element-plus/theme-chalk/src/common/var.scss" with (
  $colors: (
    'white': #ffffff,
    'black': #000000,
  ),
  $font-path: 'element-plus/theme-chalk/fonts',
  $sm: 1140px,
  $md: 1440px,
  $lg: 1680px,
  $xl: 1840px,
);

@import "element-plus/theme-chalk/src/index.scss";

// ===== 下面写覆盖的样式
.el-input {
  > .el-input__inner {
    border-radius: 2px;
  }
}

.el-card {
  .el-card__header {
    border-bottom: 1px solid #e8eaec;
  }
}