css3实现0.5px边框

news2025/2/23 2:56:51

效果图

在这里插入图片描述

代码

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>css3实现0.5px边框</title>
    <style>
        h5 {
            margin: 0;
            padding: 0;
            text-align: center;
            margin: 15px 0;
        }

        .group {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .item {
            width: 120px;
            height: 80px;
            background-color: rgba(238, 238, 238,.6);
            margin-right: 10px;
            box-sizing: border-box;
        }

        .item.top {
            border-top: 1px solid #e95325;
        }

        .item.right {
            border-right: 1px solid #e95325;
        }

        .item.bottom {
            border-bottom: 1px solid #e95325;
        }

        .item.left {
            border-left: 1px solid #e95325;
        }

        .item.all {
            border: 1px solid #e95325;
        }

        /* 0.5像素的 分割线 */
        .hairline,
        .hairline-top,
        .hairline-right,
        .hairline-bottom,
        .hairline-left {
            position: relative;
        }

        .hairline::after,
        .hairline-top::after,
        .hairline-right::after,
        .hairline-bottom::after,
        .hairline-left::after {
            position: absolute;
            top: -50%;
            right: -50%;
            bottom: -50%;
            left: -50%;
            content: " ";
            pointer-events: none;
            border: 0 solid #e95325;
            -webkit-box-sizing: border-box;
            -moz-box-sizing: border-box;
            box-sizing: border-box;
            -webkit-transform: scale(0.5);
            -moz-transform: scale(0.5);
            transform: scale(0.5);
        }

        .hairline::after {
            border-width: 1px;
        }

        .hairline-top::after {
            border-top-width: 1px;
        }

        .hairline-right::after {
            border-right-width: 1px;
        }

        .hairline-bottom::after {
            border-bottom-width: 1px;
        }

        .hairline-left::after {
            border-left-width: 1px;
        }
    </style>
</head>

<body>
    <h5>上边框</h5>
    <div class="group">
        <div class="item hairline-top"></div>
        <div class="item top"></div>
    </div>
    <h5>右边框</h5>
    <div class="group">
        <div class="item hairline-right"></div>
        <div class="item right"></div>
    </div>
    <h5>下边框</h5>
    <div class="group">
        <div class="item hairline-bottom"></div>
        <div class="item bottom"></div>
    </div>
    <h5>左边框</h5>
    <div class="group">
        <div class="item hairline-left"></div>
        <div class="item left"></div>
    </div>
    <h5>四边框</h5>
    <div class="group">
        <div class="item hairline"></div>
        <div class="item all"></div>
    </div>
</body>

</html>