body{
    margin: 0;
    padding: 0;
    background: none;
    font-size: 16px;
    font-family: "Microsoft YaHei UI";
    overflow: hidden;
    overflow-y: auto;
}
/*响应式网站中字体的大小*/
@media screen and (min-width: 1440px){

}
@media screen and (min-width: 1280px) and (max-width: 1440px){

}
@media screen and (min-width: 992px) and (max-width: 1280px){

}
@media screen and (min-width: 768px) and (max-width: 992px){

}
@media screen and (max-width: 768px){

}