main {
  width: 1200px;
  margin: 0 auto;
  padding-bottom: 80px;
}

.content {
  display: flex;
}
.content .right-content {
  flex: 1;
}

.aside {
  width: 281px;
}
.aside-banner {
  position: relative;
  width: 281px;
  height: 90px;
}
.aside-banner img {
  width: 100%;
  height: 100%;
}
.aside-banner .aside-title {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 21px;
  line-height: 18px;
  font-weight: 500;
  color: #ffffff;
  z-index: 1;
}
.aside ul {
  width: 100%;
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-sizing: border-box;
}
.aside ul li a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 23px;
  font-size: 18px;
  font-weight: 400;
  color: rgba(0, 0, 0, 0.65);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.aside ul li:last-of-type a {
  border-bottom: none;
}
.aside ul li a.active,
.aside ul li a:hover {
  font-weight: 500;
  color: #045afe;
}
.aside ul li a.active .arrow {
  display: flex;
}
.arrow {
  display: none;
  position: relative;
  width: 0;
  height: 0;
}
.arrow::before,
.arrow::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 1px;
  background-color: #045afe;
}
.arrow::before {
  transform: rotate(45deg);
  top: -3px;
  right: 0;
}
.arrow::after {
  transform: rotate(-45deg);
  bottom: -3px;
  right: 0;
}

.right-content {
  margin-left: 52px;
}
.right-content .main-title {
  display: flex;
  justify-content: space-between;
  font-weight: 500;
  font-size: 21px;
  line-height: 18px;
  padding-top: 17px;
  padding-bottom: 19px;
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.2);
  color: rgba(0, 0, 0, 0.65);
}
.right-content ul {
}
.right-content ul li a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 400;
  font-size: 16px;
  line-height: 36px;
  color: rgba(0, 0, 0, 0.85);
}
.right-content ul li a:hover {
  color: #045afe;
}
.right-content ul li a .title {
  width: 682px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.right-content ul li a .date {
  line-height: 16px;
  color: #aaaaaa;
}