怎么将一个div 大盒子分成四个小盒子并且有间距

img


怎么将一个div 大盒子分成四个小盒子并且有上下左右间距就像图中的一样效果

使用 flex

 <div>
      <div></div>
      <div></div>
      <div></div>
      <div></div>
    </div>



 <style>
    section{
      display: flex;
      justify-content: space-evenly;
      align-items: center;
      flex-wrap: wrap;
      height: 400px;
      width: 400px;
    }
    div{
      width: 45%;
      height: 45%;
      border: 1px solid grey;
    }
  </style>
</head>
<body>
  <section>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
  </section>
</body>


<style>
    .h{
        width: 700px;
        height: 700px;
        background-color: black;
        padding: 25px;
    }
    .hu{
        width: 700px;
        height: 50px;
        background-color: aqua;
    }
    .hu-t{
        width: 700px;
        height: 50px;
        background-color: aqua;
        margin-top: 25px;
    }
    .header{
          height: 450px;
          width: 700px;
          margin-top: 25px;
          background-color: wheat;
          display: flex;
          justify-content: space-evenly;
          align-items: center;
          flex-wrap: wrap;
        }
        div{
          width: 45%;
          height: 45%;
          background-color: white;
        }
        .fa{
            width: 700px;
            height: 50px;
            background-color: #F5DEB3;
            margin-top: 50px;
        }
    </style>
</head>
 
<body>
    <div class="h">
        <div class="hu"></div>
        <div class="hu-t"></div>
        <div class="header">
            <div></div>
            <div></div>
            <div></div>
            <div></div>
    </div>
    <div class="fa"></div>
</body>