body{
    margin: 0;
    padding: 0;
    background: rgb(223, 219, 219);
}
.float-left{
    float: left;
}
.float-right{
    float: right;
}
.head-fixed{
    width: 100%;
    background: #ffffffd2;
    height: 64px;
    z-index: 1000;
    top: 0;
    left: 0;
    box-shadow: 0 2px 4px -1px rgba(0,0,0,.2),0 4px 5px 0 rgba(0,0,0,.14),0 1px 10px 0 rgba(0,0,0,.12);
    margin-bottom: 20px;
}
.head-item{
    width: 48px;
    height: 48px;
    margin: 8px;
}
.head-item:hover{
    background: rgba(4, 8, 255, 0.26);
    border-radius: 24px;
}
.head-item>img{
    width: 24px;
    height: 24px;
    padding: 12px;
}
.content{padding: 20px;
    background-color: white;
    width: 1000px;
    margin: 0 auto;
}
@media(max-width:1000px){
    .content{
        width: 100%;
    }
    .feed-content{
        width: calc(100% - 40px);
    }
}