body {
  background-color: #f5f5f5;
}
.white_box {
  padding: 30px;
  background-color: #fff;
}
h2 {
  font-size: 30px;
  text-align: center;
  border-bottom: 2px solid #ddd;
  padding-bottom: 10px;
  margin-bottom: 20px;
}
.wxwb {
  overflow: hidden;
  margin: 0 -10px;
}
.wxwb li {
  width: 33.333%;
  float: left;
  padding: 10px;
}
.wxwb li .item {
  display: block;
  padding: 14px;
  border: 1px solid #ddd;
  overflow: hidden;
}
.wxwb li .item img {
  display: block;
  width: 100px;
  height: 100px;
  float: left;
}
.wxwb li .item .txt {
  float: left;
  padding-left: 16px;
  width: calc(100% - 100px);
  line-height: 1.5;
}
.wxwb li .item .txt p {
  margin-bottom: 10px;
  font-size: 18px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.wxwb li .item .txt span {
  font-size: 14px;
  color: #999;
}
@media all and (max-width: 767px) {
  .wxwb li {
    width: 100%;
  }
}