body{font-family:"Microsoft Yahei"; min-width: 1200px;}
.tc_bg1{background: url(images/xhbx_1.jpg) center 0 no-repeat; height: 1000px; overflow: hidden;}
.tc_bg2{background: url(images/xhbx_2.jpg) center 0 no-repeat; height: 1000px; overflow: hidden;}
.tc_bg3{background: url(images/xhbx_3.jpg) center 0 no-repeat; height: 1000px; overflow: hidden;}
.tc_bg4{background: url(images/xhbx_4.jpg) center 0 no-repeat; height: 1000px; overflow: hidden;}
.tc_bg5{background: url(images/xhbx_5.jpg) center 0 no-repeat; height: 350px; overflow: hidden;}