.md-about-11.md21864 {
  padding-top: 0.3rem;
  padding-bottom: 1.1rem;
  position: relative;
  overflow: hidden;
}
.md-about-11.md21864 .layout {
  margin-left: auto;
  margin-right: auto;
  width: 14.4rem;
  max-width: 92%;
}
.md-about-11.md21864 .h2 {
  line-height: 1.25;
}
.md-about-11.md21864 .desc {
  color: var(--active);
  margin-top: 0.03rem;
}
.md-about-11.md21864 .tip {
  padding: 0 10%;
  margin-top: 0.26rem;
  line-height: 1.8;
}
.md-about-11.md21864 .box-1 .box1-left {
  width: calc( 320 / 1440 * 100%);
}
.md-about-11.md21864 .box-1 .box1-right {
  width: calc( 1000 / 1440 * 100%);
}
.md-about-11.md21864 .box-1 .content {
  line-height: calc(30 / 16);
  padding-top: 0.07rem;
}
@media screen and (max-width: 900px) {
  .md-about-11.md21864 .box-1 .box1-left {
    width: 100%;
  }
  .md-about-11.md21864 .box-1 .box1-right {
    width: 100%;
    margin-top: 0.3rem;
  }
}
.md-about-11.md21864 .box-2 {
  position: relative;
  margin-top: 0.84rem;
  cursor: pointer;
}
.md-about-11.md21864 .box-2 .img {
  padding-top: calc( 650 / 1440 * 100%);
}
.md-about-11.md21864 .box-2 .watch {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: #fff;
}
.md-about-11.md21864 .box-2 .watch svg {
  width: 1em;
  height: 1em;
}
.md-about-11.md21864 .box-3 {
  margin-top: 0.8rem;
  padding-top: 0.5rem;
  padding-bottom: 0.56rem;
  border-top: 1px solid #eee;
  border-bottom: 1px solid #eee;
}
.md-about-11.md21864 .box-3 .ni {
  width: 20%;
}
.md-about-11.md21864 .box-3 .n11 {
  display: inline-flex;
}
.md-about-11.md21864 .box-3 .n11 img {
  height: 1em;
}
.md-about-11.md21864 .box-3 .n12 {
  color: var(--active);
  line-height: 1;
  margin-top: 0.25rem;
  margin-bottom: 0.1rem;
}
@media screen and (max-width: 900px) {
  .md-about-11.md21864 .box-3 .ni {
    width: 50%;
    margin: 0.25rem 0;
  }
}
.md-about-11.md21864 .box-4 {
  margin-top: 1rem;
}
.md-about-11.md21864 .box-4 .li {
  background-color: #f5f5f5;
}
.md-about-11.md21864 .box-4 .c-pic {
  width: 50%;
  background-color: #eee;
}
.md-about-11.md21864 .box-4 .img {
  padding-top: calc( 440 / 720 * 100%);
  height: 100%;
}
.md-about-11.md21864 .box-4 .text {
  width: 50%;
  padding: 0.2rem 0.7rem;
}
.md-about-11.md21864 .box-4 .content {
  line-height: calc(30 / 16);
}
@media screen and (min-width: 901px) {
  .md-about-11.md21864 .box-4 .li:nth-child(2n-1) .dd {
    flex-direction: row-reverse;
  }
}
@media screen and (max-width: 900px) {
  .md-about-11.md21864 .box-4 .c-pic {
    width: 100%;
  }
  .md-about-11.md21864 .box-4 .text {
    width: 100%;
    padding: 0.4rem;
  }
}