html, body, div, span, applet, object,a,ul, li{margin:0; padding:0; border:0; outline:0}
html, body{width:100%;height:100%;overflow:hidden;}
img{ border:0; display:block;max-width: 100%;max-height: 100%;}
ol, ul{ list-style:none}


.nhw .box_bg{width: 100%;height: 100%;overflow: hidden;position: absolute;background-repeat: no-repeat;background-position: center center;background-size: cover;}
.nhw .box_main{width: 100%;height: calc(100% - 80px);overflow: hidden;position: relative;padding-top: 80px;}

.nhw .box_main>.box_md{text-align: left;position: absolute;top: 50%;margin-top: -130px;width: 100%;height: 300px;}
.nhw .box_main>.box_md img{margin-left:100px}
.nhw .box_tt img{display: inline;}