*{padding: 0;margin: 0;}
a{text-decoration: none;}
body{min-width:68.75rem;}
li{list-style-type: none;float: left;}
.topmenu{    box-shadow: 0px 2px 3px 0px rgba(138, 103, 3, 0.62);background-color: #dfa500;height: 3.75rem;padding:0rem 6.25rem;min-width:56.25rem;position: relative;z-index: 1;}
.logo{float: left;width:12.5rem;height:3rem;    padding-top: 5px;}
.menu{float: right;}
.menu li{padding:0rem 1rem;line-height: 3.75rem;color: #fff;}
.menu li:hover{background-color:#ffe2ae;color: #282828;}
.menu li a{color: #fff;}
.menu li:hover a{color: #282828;}
/* banner */
.banner{min-width: 68.75rem;margin: auto;position: relative;}
.bannertu{max-width: 100%;min-width:68.75rem;}
.bannertu img{height: 100%;
    margin-top: -4px;
    position: relative;}