/* - - - - - - - - - 各浏览器样式默认值标准化  - - - - - - - - -*/
html,body,span,object,iframe,h1,h2,h3,h4,h5,p,blockquote,pre,
a,address,code,
del,em,img,dl,dt,dd,ol,ul,li,
fieldset,form,label{
margin:0;padding:0;border:0;
font-style:inherit;font-family:inherit;vertical-align:baseline;}
img{border:none;vertical-align:middle;}
input,select,button{vertical-align:middle;}
input{padding:0;}
button{cursor:pointer;}
html{-webkit-text-size-adjust:none;}
body{min-width:320px;max-width:640px;font-size:62.5%;font-family:Arial,'Microsoft YaHei', Helvetica, sans-serif;margin:0 auto;}
ul,ol{list-style-type:none;}
h1{font-size:2.4em;}
h2{font-size:1.8em;}
h3,h4{font-size:1.4em;}
h5{font-size:1.2em;}
em,address{font-style:normal;}
a{ text-decoration:none;color:#4f4f4f;}

/*链接样式*/
a:link{}	
a:hover{}	/*鼠标悬停时*/
a:active{transition:color 200ms linear 0s,background-color 200ms linear 0s,border-color 200ms linear 0s;color:#f00000;}
a:visited{}/* 访问过 */
/*  - - - - - - - - - 常用类样式  - - - - - - - - -*/
.no_bor{ border:none!important;}	/*无边框*/
.no_bg{ background:none!important;}	/*无背景*/
.clear{ display:block;height:0; line-height:0;overflow:hidden; clear:both;font-size:0;}/*清除浮动*/
.f_left{ float:left;}	/*左浮动*/
.f_right{ float:right;}	/*右浮动*/
.center{}	/*让内容区块居中*/
input, select, textarea {margin:0; padding:0; outline:none;font-family:Arial,'Microsoft YaHei', Helvetica, sans-serif;box-sizing:border-box;}
input::-webkit-input-placeholder,textarea::-webkit-input-placeholder { color: #fff; } 
	input:-moz-placeholder,textarea:-moz-placeholder {color: #fff;} 
	input::-moz-placeholder,textarea::-moz-placeholder {color: #fff;} 
	input:-ms-input-placeholder,textarea:-ms-input-placeholder {color: #fff;}
	@media screen and (min-width: 641px){body{font-size:62.5%;}
}	
@media screen and (max-width: 580px){body{font-size:56.641%;}}	
@media screen and (max-width: 500px){body{font-size:48.828%;}}	
@media screen and (max-width: 480px){body{font-size:46.875%;}}	
@media screen and (max-width: 440px){body{font-size:42.969%;}}	
@media screen and (max-width: 400px){body{font-size:39.063%;}}	
@media screen and (max-width: 360px){body{font-size:35.156%;}}	
@media screen and (max-width: 320px){body{font-size:31.250%;}}