.main-box {
  padding-bottom: 100px;
}
.header-img img {
  width: 100%;
}
.dfw {
  width: 1200px;
  margin: 0 auto;
}

/* 额外内容 */
.list-box {
  display: flex;
  flex-direction: column;
  gap: 40px;
  margin-top: 60px;
}
.list-item {
  display: flex;
  font-family: 微软雅黑, "Microsoft YaHei";
  gap: 60px;
}
.list-right {
  /* flex: 1; */
  width: 500px;
  overflow: hidden;
}
.list-img {
  width: 400px;
  height: 361px;
}
.list-title {
  border-bottom: 1px dashed #777;
  padding-bottom: 14px;
  margin: 0 0 15px 0;
  font-size: 20px;
  font-weight: bold;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list-title a {
  color: #0a52cc;
}
.list-title a:nth-child(3) {
  font-size: 14px;
  font-weight: normal;
  margin-left: 20px;
  cursor: pointer;
}
.list-content {
  height: 36px;
  font-size: 16px;
  line-height: 36px;
  display: flex;
  align-items: center;
  gap: 15px;
}
.list-content a {
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list-title a:hover {
  text-decoration: underline;
}
.list-content a:hover {
  color: rgb(192, 0, 0);
  text-decoration: underline;
}

.row-1 {
  margin-top: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.r1-title-img {
  width: 282px;
  height: 80px;
}
.r1-content {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: 20px;
  row-gap: 40px;
}
.r1-content img {
  width: 100%;
  height: 670px;
}