.banner{width:100%;height:475px}.banner img{display:none}@media(max-width:1023px){.banner{height:auto}.banner img{display:block;width:100%}}@media(max-width:767px){.count_content{margin-top:20px}.sign{margin-top:20px}}@media(max-width:424px){.sign .form input[type=text]{width:200px}}