video{    max-width: 100%;}


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

.sect5 ul li::before {

    top: 15px;}}
@media only screen and (max-width:700px) {
    .zhlist li {
        line-height: 28px;
        font-size: 14px;
        padding: 15px 0 5px 37px;}}