.brand-activity-case {
  width: 100%;
  background: #f5f5f5;
  padding-bottom: 50px;
}

.brand-activity-case > .box {
  max-width: 1280px;
  margin: 0 auto;

}

.brand-activity-left {
  width: 20%;
  background: #fff;
  float: left;
  border-top: 2px solid #a91f24;
  border-bottom: 2px solid #a91f24;
}

.brand-activity-left .items {
  width: 100%;
  height: 0;
  padding-top: 46%;
  border-bottom: 1px solid #dddddd;
  position: relative;
  overflow: hidden;
}

.brand-activity-left .actived {
  background: #a91f24;
}

.brand-activity-left .actived:after {
  width: 118.2%;
  height: 1px;
  display: block;
  content: "";
  background: #ef4422;
  transform-origin: left bottom;
  transform: rotate(-24.8deg);
}

.brand-activity-left .actived:before {
  position: absolute;
  display: block;
  content: "";
}

.brand-activity-left .items div {
  width: 60%;
  height: 60%;
  background: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-activity-left .actived div {
  background: #a91f24;
}

.brand-activity-left .items div a {
  font-size: 1.6rem;
  color: #333333;
}

.brand-activity-left .actived div a {
  color: #fff;
}

.brand-activity-left .items:last-child {
  border: none;
}

.brand-activity-right {
  width: 78%;
  background: #fff;
  float: right;
}

.brand-activity-right .box {
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  flex-direction: column;
}

.brand-activity-title {
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-bottom: 1px solid #ddd;
  padding: 20px 0 10px 0;
}

.brand-activity-title h4 {
  text-align: center;
  line-height: 60px;
  font-size: 3rem;
}

.brand-activity-title p {

}

.brand-activity-title p span {
  margin: 0 10px;
  font-size: 1.4rem;
}

.brand-activity-main {
  width: 94%;
  color: #333;
  padding: 10px 0;
  margin: 0 auto;
}

.brand-activity-main p {
  font-size: 1.4rem;
  line-height: 2.4rem;
  margin: 30px 0;
}

.brand-activity-main p img {
  width: 80%;
  display: block;
  margin: 0 auto;
}