样式初始化:

html,p,span,blockquote,address,cite,code,del,dfn,em,img,ins,kbd,q,samp,small,strong,sub,sup,var,b,i,dl,dt,dd,ol,ul,li,fieldset,form,label,tbody,tfoot,thead,tr,th,td,header{
	margin:0;
	padding:0;

}

body{
	margin: 0; 
	border: 0;
}
em,i {
	font-weight:100;
	font-style:normal;
}
ul,ol,li {
	list-style-type:none;
}
a {
      color: black;
	text-decoration:none;
	outline:0;
}
a:hover {
	text-decoration:none;
}