body,
html {
  margin: 0;
  padding: 0;
  font-family: microsoft yahei, helvetica, arial;
  background-color: #f2f2f2;
}

main {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  height: 100vh;
}

.logo {
  font-size: 14px;
  text-align: center;
  color: #888;
}

i.ico {
  display: block;
  width: 164px;
  height: 64px;
  margin: 15px auto;
  background: url("../images/logo.png") no-repeat center;
  background-size: 100%;
}

.weixinhint {
  position: fixed;
  top: 0;
  display: none;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  text-align: center;
}
.weixinhint img {
  width: 80%;
  margin-top: 100px;
}