.banner{background-image:url(../img/bgdm.b2543658.png);background-size:100% 100%;background-position:50%;height:520px}.block-gap{margin-top:80px;padding:0 15%}.history{background-color:rgba(221,238,247,.97)}@media screen and (max-width:1660px){.block-gap{padding:0 10%}.banner{height:450px}}@media screen and (max-width:1440px){.block-gap{padding:0 6%}}