.banner {
  height: 600px;
  overflow: hidden;
}
.banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: myfirst 20s linear infinite;
}
@keyframes myfirst {
  0% {
    transform: scale(1);
  }
  25% {
    transform: scale(1.1);
  }
  50% {
    transform: scale(1.15);
  }
  75% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}
@-moz-keyframes myfirst {
  /* Firefox */
  0% {
    transform: scale(1);
  }
  25% {
    transform: scale(1.1);
  }
  50% {
    transform: scale(1.15);
  }
  75% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}
@-webkit-keyframes myfirst {
  /* Safari and Chrome */
  0% {
    transform: scale(1);
  }
  25% {
    transform: scale(1.1);
  }
  50% {
    transform: scale(1.15);
  }
  75% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}
@-o-keyframes myfirst {
  /* Opera */
  0% {
    transform: scale(1);
  }
  25% {
    transform: scale(1.1);
  }
  50% {
    transform: scale(1.15);
  }
  75% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}
.main-center {
  display: flex;
  margin-bottom: 3rem;
}
.main-center .left {
  width: 70%;
  margin-right: 5%;
}
.main-center .left > h1 {
  font-size: 2rem;
  padding: 2rem 0;
}
.main-center .left .back {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 2rem;
  border-bottom: 1px solid #ebebeb;
}
.main-center .left .back img {
  width: 40px;
  height: 40px;
  background-size: cover;
  border: 1px solid #999;
  border-radius: 50%;
}
.main-center .left h3 {
  margin-bottom: 3rem;
  margin-top: 3rem;
}
.main-center .left .content p {
  text-indent: 2em;
  line-height: 2;
  font-size: 0.8rem;
}
.main-center .left .content .bottom {
  margin-top: 3rem;
}
.main-center .left .content .bottom h1 {
  font-size: 0.8rem;
  padding: 0 0;
  padding-bottom: 3rem;
}
.main-center .left .content span {
  white-space: nowrap;
}
.main-center .right {
  width: 25%;
}
.main-center .right h1 {
  font-size: 1rem;
  font-weight: bold;
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 1rem;
}
.main-center .right h1::before {
  content: "";
  position: absolute;
  width: 0.2rem;
  height: 100%;
  background-color: red;
  left: 0;
}
.main-center .right .content a .item {
  margin-top: 1rem;
}
.main-center .right .content a .item .img {
  width: 100%;
  height: 10rem;
  background-color: #999;
}
.main-center .right .content a .item .img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.main-center .right .content a .item h2 {
  font-size: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid #999;
}
.main-center .right .content a:last-of-type h2 {
  border-bottom: unset;
}
@media screen and (max-width: 768px) {
  .banner {
    height: 12rem;
    margin-top: 50px;
  }
  .position {
    margin-bottom: 2rem;
  }
  .main-center {
    display: block;
    margin-bottom: 2rem;
  }
  .main-center .left {
    width: 100%;
    margin-right: 0;
    margin-bottom: 1rem;
  }
  .main-center .left h1 {
    font-size: 1.3rem;
    padding-top: 0;
  }
  .main-center .left .back {
    padding-bottom: 0;
  }
  .main-center .left h3 {
    margin: 1rem 0;
  }
  .main-center .left .content .bottom h1 {
    padding-bottom: 1rem;
  }
  .main-center .right {
    width: 100%;
  }
  .main-center .right .content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
  }
  .main-center .right .content a {
    width: 49%;
  }
}