* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: Arial, sans-serif;
    }

    .ul1 a {
      text-decoration: none;
      color: #ffffff;
      font-weight: bold;
    }

    .ul1 {
      list-style: none;
      display: flex;
      justify-content: space-around;
      padding: 10px 0;
    }

    .nav1 {
      background-color: #012c9b;
      width: 100vw;
    }

    .div2 {
      text-align: center;
      margin-top: 0px;
    }

    .div2 img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: contain;
    }

    .hotline-fixed {
        position: fixed;
        bottom: 230px;
        left: 20px;
        background-color: #25dd2e;
        color: #fff;
        padding: 10px 15px;
        border-radius: 50px;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        font-size: 15px;
        z-index: 1000;
        transition: background-color 0.3s;
    }

  .hotline-fixed a {
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
  }

  .hotline-fixed i {
    margin-right: 10px;
  }

  .hotline-fixed:hover {
    background-color: #ffffff;
  }