1 效果

2 代码

.box {
        border: aqua 2px solid;
      }
      body > .box-body {
        display: flex;
        flex: 1 1 auto;
        flex-flow: column nowrap;
      }
      header > .box-top {
        display: flex;
        flex-flow: row nowrap;
        align-items: center;
      }
      header > .box-top img {
        margin-left: 1em;
      }
      header > .box-top div {
        flex: 2em;
      }
      header > .box-top div:first-of-type {
        margin-left: 1em;
      }
      header > .box-top div:last-of-type {
        display: flex;
        justify-content: flex-end;
        margin-right: 1em;
      }
      header > .box-top div:last-of-type p {
        min-width: 3em;
      }
      header > .box-middle {
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 1em 0;
      }
      header > .box-middle img {
        width: 4em;
      }
      header > .box-bottom {
        text-align: center;
      }
      .container > main > .box-top {
        display: flex;
        justify-content: center;
        align-items: center;
      }
      .container > main > .box-top > a {
        text-decoration: none;
        margin: auto;
      }
      .container > main > .box-middle {
        display: flex;
        justify-content: center;
        align-items: center;
        flex-flow: row wrap;
      }
      .container > main > .box-middle > a {
        text-decoration: none;
        flex: 0 0 6em;
      }
      .container > main > .box-bottom {
        display: flex;
        flex-flow: row nowrap;
        justify-content: center;
      }
      .container > main > .box-bottom > .box {
        min-height: 20em;
      }
      .container > main > .box-bottom > .box-left {
        width: 30%;
      }
      .container > main > .box-bottom > .box-main {
        width: 70%;
      }
      footer {
        text-align: center;
      }
      @media screen and (max-width: 1000px) {
        .container > main > .box-bottom > .box-left {
          display: none;
        }
      }
      @media screen and (max-width: 800px) {
        .container > main > .box-middle {
          display: none;
        }
      }
      .box-main {
        display: flex;
        flex-flow: row wrap;
        flex: 1 1 auto;
        align-items: center;
        justify-content: space-evenly;
      }
      .box-main > .box-img {
        border: orchid 2px dashed;
        background-color: skyblue;
        color: white;
        border-radius: 2em;
        min-height: 12em;
        min-width: 10em;
        display: flex;
        flex-flow: column nowrap;
        align-items: center;
        justify-content: space-evenly;
      }
      .box-main > .box-img > img {
        width: 3em;
        height: 3em;
        border-radius: 30%;
      }