.media {
  margin: 100px auto;
}

#ins-containerB #ins-catSeriesCatlist .media__title {
  font-size: 28px;
  line-height: 1;
  padding-bottom: 20px;
  border-bottom: 3px double #824459;
  color: #824459;
  margin-bottom: 36px;
}

#ins-containerB #ins-catSeriesCatlist .media__logo {
  text-align: center;
  margin-bottom: 30px;
}
#ins-containerB #ins-catSeriesCatlist .media__logo img {
  width: 410px;
  height: auto;
}

.media__articles {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
}

.media-article {
  display: block;
  width: 490px;
  flex-shrink: 0;
  box-sizing: border-box;
  border: 1px solid #eeeeee;
  padding: 20px;
  position: relative;
  transition: opacity 0.2s ease;
}
.media-article:hover {
  opacity: 0.6;
}
.media-article::after {
  content: "";
  display: block;
  position: absolute;
  width: 28px;
  height: 28px;
  right: 0;
  bottom: 0;
  background: #824459;
  -webkit-clip-path: polygon(100% 0, 100% 100%, 0 100%);
          clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

.media-article__thumbnail {
  width: 450px;
  height: 180px;
  overflow: hidden;
  margin-bottom: 15px;
}
.media-article__thumbnail img {
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
}

.media-article__title {
  font-family: "Yu Gothic", "YuGothic", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: #333;
}