Html代码: <!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link rel="shortcut icon" href="https://llyth.cn/img/favicon.ico" type="image/x-icon"> <link rel="stylesheet" href="css/index.css"> <title>Document</title> </head> <body> <div class="container"> <div class="overlay"></div> </div> </body> </html>HTMLCopy全屏 CSS代码: * { margin: 0; padding: 0; box-sizing: border-box; } .container { position: relative; height: 100vh; background-image: url("../img/wrapper.jpg"); background-size: cover; background-position: center; } .overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.5); }CSSCopy全屏 声明: 本文采用 BY-NC-SA 协议进行授权,如无注明均为原创,转载请注明转自 Eric · 梦曦 本文地址: HTML 网页背景图+半透明遮罩层效果