body {
      font-family: font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
      background-color: #f5f5f7;
      height: 100vh;
      width: 100vw;
      margin: 0;
      font-size: 20px;
    }

    .container {
      background: white;
      padding: 2rem;
      border-radius: 20px;
      box-shadow: 0 12px 24px rgba(0,0,0,0.1);
      width: 50%;
      margin: 0 auto;
    }

    img {
      display: block;
      max-width: 100%;
      max-height: 100%;
      width: auto;
      height: auto;
    }