body {
  background: #fff;
}

.activity-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.activity-container .container-main {
  flex: 1;
  padding: 2rem 0 2.5rem;
}

.activity-container .container-main .main-content .cont-item {
  background: #F4F6FB;
  border-radius: .3125rem;
  padding: 1rem;
  width: calc(25% - .375rem);
  margin-right: .5rem;
  cursor: pointer;
  margin-top: .5rem;
}

.activity-container .container-main .main-content .cont-item:nth-child(4n) {
  margin-right: 0;
}

.activity-container .container-main .main-content .cont-item .item-image {
  position: relative;
  width: 100%;
  height: 0;
  padding-top: 72%;
  overflow: hidden;
  border-radius: .5rem;
}

.activity-container .container-main .main-content .cont-item .item-image .image {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  transition: transform .3s;
}

.activity-container .container-main .main-content .cont-item .item-box {
  overflow: hidden;
}

.activity-container .container-main .main-content .cont-item .item-box .box-title {
  margin-top: 1rem;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.375rem;
  color: #333;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  transition: color .3s;
}

.activity-container .container-main .main-content .cont-item .item-box .box-label {
  margin-top: .625rem;
  display: flex;
  align-items: center;
}

.activity-container .container-main .main-content .cont-item .item-box .box-label .icon {
  width: 1.125rem;
  height: 1.125rem;
  color: var(--main-color);
}

.activity-container .container-main .main-content .cont-item .item-box .box-label .text {
  margin-left: .375rem;
  font-size: .875rem;
  line-height: 1.25rem;
  color: #8D929C;
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.activity-container .container-main .main-content .cont-item:hover .item-image .image {
  transform: scale(1.2);
}

.activity-container .container-main .main-content .cont-item:hover .item-box .box-title {
  color: var(--main-color);
}

.activity-container .container-main .main-code {
  display: none;
  padding: 2rem;
}

.activity-container .container-main .main-code .code-title {
  color: #333;
  font-size: 1.5rem;
  font-weight: bold;
  line-height: 2.125rem;
  text-align: center;
}

.activity-container .container-main .main-code .code-tips {
  color: #8D8D8D;
  font-size: 1rem;
  line-height: 1.375rem;
  text-align: center;
}

.activity-container .container-main .main-code .code-image {
  width: 100%;
  max-height: 17.5rem;
  max-width: 17.5rem;
  margin: 1rem auto;
}

@media screen and (max-width: 767px) {
  .activity-container .container-main {
    padding: 2rem 0;
  }
  .activity-container .container-main .main-content {
    flex-direction: column;
  }
  .activity-container .container-main .main-content .cont-item {
    border-radius: 0;
    padding: 0;
    background: transparent;
    width: 100%;
    margin-right: 0;
    margin-top: 1rem;
    display: flex;
    align-items: normal;
  }
  .activity-container .container-main .main-content .cont-item:first-child {
    margin-top: 0;
  }
  .activity-container .container-main .main-content .cont-item .item-image {
    width: 6.875rem;
    padding-top: 5rem;
  }
  .activity-container .container-main .main-content .cont-item .item-box {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    margin-left: 1rem;
  }
  .activity-container .container-main .main-content .cont-item .item-box .box-title {
    margin-top: 0;
    font-size: 1rem;
    line-height: 1.375rem;
    color: #333;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
  .activity-container .container-main .main-content .cont-item .item-box .box-label {
    margin-top: 0;
    display: flex;
    align-items: center;
  }
  .activity-container .container-main .main-content .cont-item .item-box .box-label .icon {
    width: 1rem;
    height: 1rem;
    color: var(--main-color);
  }
  .activity-container .container-main .main-content .cont-item .item-box .box-label .text {
    margin-left: .375rem;
    font-size: .875rem;
    line-height: 1.25rem;
    color: #8D929C;
    flex: 1;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
  .activity-container .container-main .main-content .cont-item:hover .item-image .image {
    transform: scale(1);
  }
  .activity-container .container-main .main-content .cont-item:hover .item-box .box-title {
    color: #333;
  }
  .activity-container .container-main .main-code {
    padding: 1rem;
  }
  .activity-container .container-main .main-code .code-title {
    font-size: 1.25rem;
    line-height: 2rem;
  }
  .activity-container .container-main .main-code .code-tips {
    font-size: 1rem;
    line-height: 1.25rem;
  }
  .activity-container .container-main .main-code .code-image {
    max-height: 15rem;
    max-width: 15rem;
  }
}