.article-container {
  width: 1400px;
  margin: 100px auto;
}
.article-container .article-nav {
  width: 220px;
  float: left;
  border: 1px solid #d6d6d6;
  border-top: none;
  box-sizing: border-box;
}
.article-container .article-nav dt {
  border-top: 1px dashed #d5d5d5;
  height: 30px;
  line-height: 30px;
  font-size: 16px;
  color: #202020;
  font-weight: bold;
  padding-left: 20px;
  padding-top: 10px;
}
.article-container .article-nav span {
  display: block;
  height: 10px;
}
.article-container .article-nav dd {
  height: 25px;
  padding-left: 20px;
}
.article-container .article-nav dd a {
  font-size: 16px;
  color: #202020;
  letter-spacing: 1px;
  text-decoration: none;
}
.article-container .article-nav dd a.active {
  color: #f1506f;
  text-decoration: none;
}
.article-container .article-nav dd a:hover {
  color: #f1506f;
  text-decoration: none;
}
.article-container .article-nav dd:last-child {
  border-bottom: none;
}
.article-container .article-content {
  width: 1120px;
  float: right;
  overflow: hidden;
  box-sizing: border-box;
  background: #ffffff;
  border: 1px solid #d6d6d6;
  min-height: 408px;
}
.article-container .article-content .article-title {
  height: 40px;
  line-height: 40px;
  padding-left: 20px;
  font-size: 18px;
  border-bottom: 1px dashed #d5d5d5;
}
.article-container .article-content .main-content {
  padding: 30px 20px;
}