CSS background-origin 示例

<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <title>CSS background-origin 示例</title>
  <style>
    .demo-box {
      width: 400px;
      margin: 0 auto;
      font-size: 20px;
      font-family: sans-serif;
    }
    .origin-demo-box {
      width: 100%;
      height: 200px;
      border: 20px dotted  #666;
      padding: 18px;
      background-image: url("/fs/uploads/tutorial/2026/01/d29e6e3e6d2bed5d107a5a9bb04fa68d.jpg");
      background-repeat: no-repeat;
      background-size: cover;
      background-color: #2196F3;
      box-sizing: border-box;
      margin-bottom: 24px;
      position: relative;
      display: flex;