@media(max- 1199px){.banner{height: 400px;}}1.6倍
@media(min- 1200px) and (max- 1365px;)} 1.6倍
@media(min- 1366px) and (max- 1599px){.banner{height: 456px;}} 1.4倍
@media(min- 1600px) and (max- 1919px){.banner{height: 532px;}} 1.2倍
@media(min-1920px){.banner{height: 640px;}