*{ margin:0px; padding:0px; font-family:Microsoft Yahei; box-sizing: border-box;}
a{ text-decoration:none;}
a:hover{ text-decoration:none;}
img,input{ border:0px;}
ul li{ list-style:none;}
em,i{ font-style:normal;}
.left{ float:left;}
.right{ float:right;}
.main{ margin:0 auto;}
body{ margin:0 auto; max-width:640px;position:relative;}
input[type="submit"],input[type="reset"],input[type="button"],button,input[type="text"]{-webkit-appearance: none;border-radius:0px; outline:none; border:0px;}
select{ border:0px;background:none;border-radius:0px;}
html,body{ height:100%}


.bg{ background:url(../images/bg.png) no-repeat top center; background-size:100% 100%; min-height: 100vh;}
@media (min-width: 640px) {/* 大于手机 */
	.td_body{background:url(../images/bg.png) no-repeat top center; background-size:640px 100%;}
}
.banner,.banner img{ display: block; width: 100%;}
.sy_list{ display: flex; justify-content: space-between; flex-wrap: wrap; padding: 0 3% 30px 3%;}
.sy_list li{ padding: 0 6px; width: 50%;}
.sy_list img{ display: block; width: 100%; margin-bottom: 10px;}
.sy_list .li{ width: 100%;}