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[前端]背景上升效果,html+css

<style></style>
给我一个渐变的效果

鼠标移入能看到效果

<!DOCTYPE html><html><head><meta charset="utf-8">    <title></title>    <style type="text/css">    .d1{width: 200px;        height: 200px;        background: green;        position: relative;        overflow: hidden;        }            .d2{width: 200px;        height: 200px;        z-index: 1;        position: absolute;        }.d2:before{content: "";    position: absolute;    width: 100%;    height: 100%;    top: 100%;    background: red;    z-index: -2;    transition: all 0.5S linear;}.d2:hover:before{top: 0%}    </style></head><body><div class="d1">    <div class="d2">给我一个渐变的效果</div></div></body></html>

 

[前端]背景上升效果,html+css