.article-box {
  padding: 10px 20px;
}
.article-box .category {
  font-size: 22px;
  font-weight: bolder;
  padding-bottom: 10px;
  border-bottom: 1px solid lightgray;
}
.article-box .title {
  font-size: 30px;
  text-align: center;
  padding: 10px 0;
  font-weight: bolder;
}
.article-box .datetime {
  text-align: center;
}
.article-box .ad {
  padding: 10px 0;
}
.article-box .ad img {
  width: 100%;
}
.article-box .content {
  width: 100%;
  overflow: hidden;
  margin-top: 30px;
}
.article-box .content img{
    max-width: 100%;
}