* {
  margin: 0;
  padding: 0;
}

body {
  font-family: sans-serif;
  background: #f0f0f0;
  color: #505050;
}

a {
  text-decoration: none;
  color: black;
}

.article {
  display: block;
  margin: 0 0 10px 0;
  padding: 12px;
  background: white;
  border-radius: 3px;
  box-shadow: 0px 1px 2px 0px rgba(0, 0, 0, 0.05);
  transition: all 220ms;
}
.article:hover {
  box-shadow: 0px 2px 3px 1px rgba(0, 0, 0, 0.1);
  transform: translateY(-5px);
  transition: all 220ms;
}
.article img {
  display: block;
  width: 60%;
  /*margin: 0 0 10px 0;*/

}
.article h2 {
  text-align: center;
  font-size: 14px;
  text-transform: uppercase;
  margin: 0 0 12px 0;
}

.wall {
  display: block;
  position: relative;
}
.wall-column {
  display: block;
  position: relative;
  /*width: 33.333333%;*/
  width: 25%;
  float: left;
  padding: 0 12px;
  box-sizing: border-box;
}
@media (max-width: 640px) {
  .wall-column {
    width: 50%;
  }
}
@media (max-width: 480px) {
  .wall-column {
    width: auto;
    float: none;
  }
}
@charset "utf-8";
.cd-top {
  display: inline-block;
  height: 40px;
  width: 40px;
  position: fixed;
  bottom: 40px;
  right: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
  /* image replacement properties */
  overflow: hidden;
  text-indent: 100%;
  white-space: nowrap;
  background: rgba(232, 98, 86, 0.8) url(../images/cd-top-arrow.svg) no-repeat center 50%;
  visibility: hidden;
  opacity: 0;
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  transition: all 0.3s;
}
.cd-top.cd-is-visible {
  /* the button becomes visible */
  visibility: visible;
  opacity: 1;
}
.cd-top.cd-fade-out {
  /* 如果用户继续向下滚动,这个按钮的透明度会变得更低 */
  opacity: .5;
}
.no-touch .cd-top:hover {
  background-color: #e86256;
  opacity: 1;
}
@media only screen and (min-width: 768px) {
  .cd-top {
    right: 20px;
    bottom: 20px;
  }
}
@media only screen and (min-width: 1024px) {
  .cd-top {
    height: 60px;
    width: 60px;
    right: 30px;
    bottom: 30px;
  }
}