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,
    "primary": (
      "base": $primary,
    ),
    'success': (
      'base': $success,
    ),
    'warning': (
      'base': $warning,
    ),
    'danger': (
      'base': $danger,
    ),
    'error': (
      'base': $danger,
    ),
    'info': (
      'base': $info,
    ),
  ),
  $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;
  }
}