html {font-size: 62.5%;
    /*10 ÷ 16 × 100% = 62.5%*/
}
body{ font-family:microsoft yahei; margin:0; padding:0; 
	font-size:1.4rem;
	/*1.4 × 10px = 14px */ }
h1,h2,h3,h4,h5,h6,ul,li,dl,dt,dd,form,img,p{margin:0; padding:0; border:none; list-style-type:none;}
a:link{ color:#666}
a:visited{ color:#666}
a:hover{ color:#ff6a00; text-decoration:none;}
.navbar{ margin-bottom:0; }
.container img{ max-width:100%; height:auto;}

.yahei{ font-family:microsoft yahei;}
.transition{ transition:0.3s; -webkit-transition:0.3s; -moz-transition:0.3s; -o-transition:0.3s;}

.center-block {
  display: block;
  margin-left: auto;
  margin-right: auto;
}
/* =====================================================
				          首页
========================================================*/
.padding_bottom_3{ padding-bottom:3rem; }
.logo{ width:100%; float:left; background-color:#00747b; text-align:center; padding:1rem 0; }
.logo img{ width:30%; }
.picture_button{ padding-top:2rem; }
.picture_button h3{ font-size:1.4rem; text-align:center; padding-top:1rem; }