.columnOverview-mobile {
  display: none;
}

.columnOverview-pc {
  background-color: #f6f6f8;
  padding-bottom: 40px;
}

.columnOverview-pc .banner {
  width: 100%;
  min-width: 1200px;
  height: calc(100vw * (79 / 400));
  min-height: 280px;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}

.columnOverview-pc .banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.columnOverview-pc .banner .banner-title {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  user-select: none;
  color: #fff;
}

.columnOverview-pc .breadcrumb {
  color: #666666;
  display: flex;
  align-items: center;
  height: 50px;
  margin-bottom: 8px;
}

.columnOverview-pc .breadcrumb img {
  width: 1.5rem;
  margin-right: 6px;
}

.columnOverview-pc .breadcrumb .breadcrumb-main span {
  display: inline-block;
  margin: 0 4px;
}

.columnOverview-pc .columnOverview-main {
  display: flex;
  flex-wrap: wrap;
}

.columnOverview-pc .columnOverview-main .columnOverview-item {
  background-color: #fff;
  border-radius: 8px;
  padding: 24px;
  width: calc((100% - 90px)/4);
  margin-bottom: 30px;
  transition: all 0.5s ease;
  margin-right: 30px;
}

.columnOverview-pc .columnOverview-main .columnOverview-item .level-one-title {
  display: flex;
  align-items: center;
  margin-bottom: 16px;
  font-size: 24px;
}

.columnOverview-pc .columnOverview-main .columnOverview-item .level-one-title img {
  width: 24px;
  margin-right: 20px;
}

.columnOverview-pc .columnOverview-main .columnOverview-item .level-two-ul {
  padding-left: 44px;
}

.columnOverview-pc .columnOverview-main .columnOverview-item .level-two-ul li {
  font-size: 16px;
  line-height: 40px;
}

.columnOverview-pc .columnOverview-main .columnOverview-item .level-two-ul li a {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: #666666;
}

.columnOverview-pc .columnOverview-main .columnOverview-item .level-two-ul li a:hover {
  color: #B21E28;
}

.columnOverview-pc .columnOverview-main .columnOverview-item .level-three-ul {
  padding-left: 20px;
}

.columnOverview-pc .columnOverview-main .columnOverview-item .level-three-ul a {
  position: relative;
}

.columnOverview-pc .columnOverview-main .columnOverview-item .level-three-ul a:before {
  content: '';
  position: absolute;
  right: calc(100% + 4px);
  width: 4px;
  height: 4px;
  top: calc((100% - 4px) / 2);
  border-radius: 50%;
  background: #666;
}

.columnOverview-pc .columnOverview-main .columnOverview-item .columnOverview-dir {
  padding-left: 44px;
  font-size: 16px;
  line-height: 32px;
  color: #666666;
  display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 6;
}

.columnOverview-pc .columnOverview-main .columnOverview-item:hover {
  box-shadow: 0px 24px 40px rgba(0, 0, 0, 0.1);
  background: white;
}

.columnOverview-pc .columnOverview-main .columnOverview-item:nth-of-type(4n) {
  margin-right: 0;
}

@media (max-width: 768px) {
  .columnOverview-pc {
    display: none;
  }
  .columnOverview-mobile {
    display: block;
  }
  .columnOverview-mobile .columnOverview-mobile-banner {
    font-size: 0;
    height: 10rem;
    position: relative;
    margin-bottom: 1rem;
  }
  .columnOverview-mobile .columnOverview-mobile-banner img {
    height: 100%;
    width: 100%;
    object-fit: cover;
  }
  .columnOverview-mobile .columnOverview-mobile-banner .banner-title {
    font-size: 1.5rem;
    position: absolute;
    left: 50%;
    top: 25%;
    transform: translateX(-50%);
    color: #fff;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item {
    border-radius: .625rem;
    background-color: #fff;
    padding: 1.5rem;
    margin-bottom: 1rem;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .columnOverview-head {
    display: flex;
    justify-content: space-between;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .columnOverview-head .columnOverview-expand {
    width: 1.5rem;
    height: 1.5rem;
    transform: translateX(-50%);
    transform: rotate(-90deg);
    transition: all 0.2s ease;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .columnOverview-head .columnOverview-expand.show {
    transform: rotate(0);
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .columnOverview-head .level-one-title {
    flex: 1;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .columnOverview-head .level-one-title img {
    width: 1.25rem;
    margin-right: .625rem;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .level-two-ul {
    padding-left: 1.75rem;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .level-two-ul li {
    font-size: 1rem;
    line-height: 2.5rem;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .level-two-ul li a {
    color: #666666;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .level-three-ul {
    padding-left: 1.125rem;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .level-three-ul a {
    position: relative;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .level-three-ul a:before {
    content: '';
    position: absolute;
    right: calc(100% + .25rem);
    width: .25rem;
    height: .25rem;
    top: calc((100% - .25rem) / 2);
    border-radius: 50%;
    background: #666;
  }
  .columnOverview-mobile .columnOverview-mobile-main .columnOverview-item .columnOverview-dir {
    padding-left: 1.75rem;
    font-size: 1rem;
    line-height: 2rem;
    color: #666666;
    display: -webkit-box;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 6;
  }
}