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* {
margin: 0;
padding: 0;
background-color: #F0F8FF;
}
#layout {
display: flex;
/* 主轴方向为纵向 */
flex-direction: column;
width: 80%;
/* 居中 */
margin: 0 auto;
}
#top {
width: 100%; /* 这里的100%相当于父级 layout 的80%*/
flex: 0 0 50px;
margin: 0 auto;
background-color: yellow;
/* height: 50px; */
}
#main {
flex: 0 0 100%;
display: flex;
flex-direction: row; /* 默认,可设可不设 */
/* 设置换行 */
flex-wrap: wrap;
}
#main div:first-child {
flex: 0 0 100%;
background-color: #F0F8FF;
list-style-type: none;
display: flex;
/* 设置允许换行 */
flex-wrap: wrap;
border-left: 1px solid white;
border-right: 1px solid white;
align-content: flex-start;
}
#main div:first-child li {
flex: 0 0 30%;
height: 40px;
/* 设置文字水平居中 */
line-height: 40px;
text-align: center;
border-bottom: 1px solid white;
}
#main div:nth-child(2) {
flex: 0 0 100%;
background-color: #F0F8FF;
list-style-type: none;
display: flex;
/* 设置允许换行 */
flex-wrap: wrap;
/* 设置间隔 */
justify-content: space-around;
}
#main div:nth-child(2) li {
flex: 0 0 30%;
height: 120px;
text-align: center;
border-bottom: 1px solid white;
background-color: greenyellow;
margin-top: 10px;
}