@charset "utf-8";
html{
    /* 确定rem的全局标准 */
    font-size:16px!important;
    /* 全局设置box-sizing */
    box-sizing: border-box;
    -moz-box-sizing:border-box; /* Firefox */
    -webkit-box-sizing:border-box; /* Safari */
}
*, *:before, *:after {
  box-sizing: inherit;
}
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,button,textarea,p,blockquote,th,td { margin:0; padding:0; }
body { background:#fff; color:#555; font-size:14px; font-family: Verdana, Arial, Helvetica, sans-serif; }
td,th,caption { font-size:14px; }
h1, h2, h3, h4, h5, h6 { font-weight:normal; font-size:100%; }
address, caption, cite, code, dfn, em, strong, th, var { font-style:normal; font-weight:normal;}
a { color:#555; text-decoration:none; }
a:hover { text-decoration:underline; }
img { border:none; }
ol,ul,li { list-style:none; }
input, textarea, select, button { font:14px Verdana,Helvetica,Arial,sans-serif; }
table { border-collapse:collapse; }
html {overflow-y: scroll;}
.clearfix:after {content: "."; display: block; height:0; clear:both; visibility: hidden;}
.clearfix { *zoom:1; }

.flex-content{
  width:64rem;
  height:100%;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  /* justify-content:space-between; */
}
.content{
  background-color:#eee;
  border-radius: 5px;
  padding:1.875rem;
}
article{
  margin-bottom:1.875rem;
}
article h2{
  font-size:1.125rem;
  font-weight: bold;
}
article dl dt,article dl dd{
  line-height: 1.875rem;
}
article dl dt{
  margin-left:1.875rem;
}
article dl dd{
  margin-left:3.75rem;
}
dt img{
  max-width:58.375rem;
}
.title{
  display: flex;
  justify-content:space-between;
  font-size:1.25rem;
  font-weight: bold;
  margin-bottom:1.875rem;
}
.chrome-png{
  display:inline-block;
  width:2.5rem;
  height:2.5rem;
  background:url('../imgs/chrome.png') no-repeat center center;
  background-size: 2.5rem 2.5rem;
}
.safari-png{
  display:inline-block;
  width:2.5rem;
  height:2.5rem;
  background:url('../imgs/safari.png') no-repeat center center;
  background-size: 2.5rem 2.5rem;
}
a.link-mark{
  color:rgb(0, 0, 255);
  text-decoration: underline;
}