.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 {
  height: 200px;
  display: flex;
  font-family: 微软雅黑, "Microsoft YaHei";
}
.list-right {
  flex: 1;
}
.list-img {
  width: 400px;
  height: 200px;
}
.list-title {
  border-bottom: 1px dashed #777;
  padding-bottom: 14px;
  padding-left: 60px;
  margin: 0 0 15px 0;
  font-size: 24px;
  color: rgb(192, 0, 0);
}
.list-title a {
  color: rgb(192, 0, 0);
}
.list-content {
  text-indent: 2em;
  font-size: 16px;
  padding: 0 60px;
  line-height: 25px;
}
.list-content a {
  color: rgb(192, 0, 0);
  cursor: pointer;
}
.list-title a:hover,
.list-content a:hover {
  text-decoration: underline;
}