.clearfix:before,
.clearfix:after {
	content: " ";
	display: table;
}

.clearfix:after {
	clear: both;
}



/* Default navigation icon 导航图标 */

.nav--active .nav__trigger {
  opacity: 0.5;
}
  .nav__icon {
  display: inline-block;
  position: relative;
  width: 30px;
  height: 3px;
  border-radius:3px;
  position:absolute;
  background-color: #3584b6;
  -webkit-transition-property: background-color, -webkit-transform;
  transition-property: background-color, -webkit-transform;
  transition-property: background-color, transform;
  transition-property: background-color, transform, -webkit-transform;
  -webkit-transition-duration: 300ms;
          transition-duration: 300ms;
}
.nav__icon:before,
.nav__icon:after {
  content: '';
  display: block;
  width: 30px;
  height: 3px;
  border-radius:3px;
  position: absolute;
  background: #3584b6;
  -webkit-transition-property: margin, -webkit-transform;
  transition-property: margin, -webkit-transform;
  transition-property: margin, transform;
  transition-property: margin, transform, -webkit-transform;
  -webkit-transition-duration: 300ms;
          transition-duration: 300ms;
}
.nav__icon:before {
  margin-top: 20px;
}
.nav__icon:after {
  margin-top: 10px;
}