.body_top{width: 100%;height:990px; background: url('http://of8fa35io.bkt.clouddn.com/body_top.png')center top no-repeat;background-color: #000}
.body_top ul{text-align: center;list-style:none;color: #fff;font-size: 24px;line-height: 65px;padding: 0;margin: 0}
.body_top ul li:first-child{font-size: 50px;line-height: 150px;margin-bottom:80px;}
.body_top a{text-align: center;display:block; width: 320px;height: 70px;margin: 0 auto; margin-top: 130px; border-radius: 45px;border:2px solid #fff;line-height: 70px;padding: 0;color: #fff;font-size: 26px;text-decoration: none;}