*{
    margin: 0;
    padding: 0;
    list-style: none;
    text-decoration: none;
}
.container{
    width: 1090px;
    margin: 0 auto;
}

.clearfloat::after{
    content: '';
    display: block;
    clear: both;
}
.sjx{
    width: 0;
    height: 0;
    border: 5px solid transparent;
    border-bottom-color: #fff;
}
.sjx-right{
    width: 0;
    height: 0;
    border: 5px solid transparent;
    border-left-color: red;
}
.side-right-sjx{
    position: absolute;
}