<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .container{ width: 1000px; margin: 10px auto; border: 1px solid red; } h3.title { color: #F2AE11; font-size: 1.3em; margin-bottom: 3em; text-align: center; font-weight: 500; line-height: 1.1; } h3.title span { display: block; /*設置爲塊級元素會獨佔一行造成上下居中的效果*/ font-size: 3em; color: #212121; position: relative; /*定位橫線(當橫線的父元素)*/ } h3.title span:before, h3.title span:after { content: ''; /*CSS僞類用法*/ position: absolute; /*定位背景橫線的位置*/ top: 52%; background: #494949; /*寬和高作出來的背景橫線*/ width: 9%; height: 2px; } h3.title span:before{ left: 25%; /*調整背景橫線的左右距離*/ } h3.title span:after { right: 25%; } </style> </head> <body> <div class="container"> <h3 class="title">Welcome to <span>Snapshot</span></h3> </div> </body> </html>