body {
  background: #eef0ff;
  font-family: Arial, sans-serif;
}
.container {
  width: 1000px;
  height: 600px;
  background: #cfe8ff;
  margin: 40px auto;
  border-radius: 40px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: center;
  align-content: center;
}
.box {
  width: 45%;
  height: 100px;
  border: 4px solid #2a2a2a;
  border-radius: 20px;
  text-align: center;
  padding: 40px;
  box-sizing: border-box;
  font-size: 48px;
  font-weight: bold;
}
.item1 {background: #ffd6e7;}
.item2 {background: #d7f7ff;}
.item3 {background: #e6ffd9;}
.item4 {background: #fff3c4;}