// https://qa.1r1g.com/sf/ask/2876734311/ // 有一种标准模式可以在一个范围内生成随机值:Min + (int)(Math.random() * ((Max - Min) + 1)) @function randomNum($min, $max) { $rand: random(); $randomNum: $min + floor($rand * (($max - $min) + 1)); @return $randomNum; } @for $i from 1 through 20 { .u-skeleton__wrapper__content__rows:nth-child(#{$i}) { width: percentage(randomNum(30, 100) / 100) !important; } }