.page-banner {
  width: 100%;
}
.page-banner img {
  width: 100%;
}
.page-banner .tit {
  display: none;
}

.board-perform .img img {
  width: 100%;
}

.table-img {
  display: none;
}

.table-img.is-active {
  display: block;
}

@media (min-width: 769px) {
  .page-banner img {
    height: 6.5rem;
  }
  .page-board {
    padding: 0.5rem 4.5rem 0.75rem;
  }
  .board-case .case-list {
    display: flex;
    flex-wrap: wrap;
  }
  .board-case .case-list .case-item {
    width: calc(25% - 0.2275rem);
    padding: 0.125rem;
    margin-left: 0.3rem;
    border: 1px solid #eee;
  }
  .board-case .case-list .case-item:nth-child(4n+1) {
    margin-left: 0;
  }
  .board-case .case-list .case-item:nth-child(4) ~ .case-item {
    margin-top: 0.3rem;
  }
  .board-case .case-list .img {
    width: 3.275rem;
    height: 2rem;
  }
  .board-case .case-list .title {
    margin-top: 0.15rem;
    margin-bottom: 0.025rem;
    color: #999;
    font-size: 0.175rem;
    line-height: 0.25rem;
    text-align: center;
  }
}
@media (max-width: 768px) {
  .page-banner img {
    height: 12.8rem;
  }
  .page-board {
    padding: 1.275rem 1.025rem 1.775rem;
  }
  .board-case .case-list {
    display: flex;
    flex-wrap: wrap;
  }
  .board-case .case-list .case-item {
    width: calc(50% - 0.425rem);
    padding: 0.625rem;
    margin-bottom: 1.275rem;
    border: 0.0625rem solid #eee;
  }
  .board-case .case-list .case-item:nth-child(even) {
    margin-left: 0.8375rem;
  }
  .board-case .case-list .case-item .img {
    height: 6.4rem;
    margin-bottom: 0.525rem;
  }
  .board-case .case-list .case-item .title {
    color: #999;
    font-size: 0.7625rem;
    line-height: 1.0875rem;
    text-align: center;
  }
}