h3, h4 {
  font-weight: 100;
}

.container {
  margin-top: 60px;
}

.container h3 {
  font-size: 24px;
}

.container .line {
  display: block;
  width: 100%;
  border-bottom: 1px solid #ccc;
  margin: 10px 0;
}

.container .two-list {
  width: 22%;
  border-left: 1px solid #999;
}

.container .two-list h4 {
  font-size: 20px;
  padding-left: 12px;
}

.container .two-list ul li {
  font-size: 16px;
  text-indent: 2em;
  color: #999;
  width: 100%;
  padding: 4px 0;
  margin: 8px 0;
  cursor: pointer;
}

.container .two-list ul li:hover {
  background: rgba(0, 0, 0, 0.4);
}

.container .two-list ul .active {
  color: #58c2ff;
}

.container .content {
  width: 78%;
  -webkit-column-count: 4;
  column-count: 4;
  padding: 0 12px;
}

.container .content .wrap {
  display: none;
}

.container .content .active {
  display: block;
}

.container .content li {
  float: left;
  margin-top: 12px;
  position: relative;
}

.container .content li img {
  width: 100%;
  cursor: pointer;
}

.container .content li span {
  position: absolute;
  right: -10px;
  top: 20px;
  color: red;
  padding: 3px 8px;
  border: 1px solid red;
  -webkit-transform: rotate(25deg);
  transform: rotate(25deg);
  -webkit-box-shadow: 2px 2px 5px black;
  box-shadow: 2px 2px 5px black;
  text-shadow: 1px 2px 3px black;
}

.preview {
  position: fixed;
  width: 90%;
  height: 80%;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.4);
  display: none;
}

.preview .left, .preview .right, .preview .close {
  position: absolute;
  cursor: pointer;
}

.preview .left, .preview .right {
  top: 45%;
  font-size: 45px;
  border-radius: 50%;
  width: 2.8rem;
  height: 2.8rem;
  background: rgba(0, 0, 0, 0.4);
  line-height: 2.8rem;
  text-align: center;
}

.preview .right {
  right: 0;
}

.preview .close {
  font-size: 30px;
  right: 10px;
  top: 10px;
}

.preview img {
  max-height: 85%;
  max-width: 92%;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}

.tail {
  display: none;
}

@media (max-width: 960px) and (min-width: 768px) {
  .container .content {
    -webkit-column-count: 3;
    column-count: 3;
  }
}

@media (max-width: 767px) {
  .container .two-list {
    width: 100%;
    border: none;
  }
  .container .two-list ul {
    margin-top: 12px;
  }
  .container .two-list ul li {
    width: 50%;
    float: left;
    white-space: nowrap;
  }
  .container .content {
    width: 100%;
    -webkit-column-count: 2;
    column-count: 2;
    margin-bottom: 20px;
  }
  .tail {
    display: block;
  }
}