body{
  background: url(/uploads/image/i429/top.png) no-repeat center top #ffffff;
  display: flex;
  flex-direction: column;      /* 垂直排列 */
  align-items: stretch;        /* 子元素宽度自适应父容器 */
  margin: 0;
  padding: 0;
}
/* 年份 */
.year {
  width: 100%;
  height: 120px;
  background-color: #1984e8;
  margin-top: 590px;
  display: flex;
  margin-bottom: 50px;
}
.year .year_list {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
  padding: 0;
  margin: 0;
}
.year .year_list li {
  flex: 1 1 0;
  min-width: 100px;
  max-width: 272px;
  width: clamp(100px, 15vw, 272px);
  height: clamp(24px, 6vw, 73px);
  border-radius: 10px;
  transition: background 0.3s;
  background: url(/uploads/image/i429/tban.png) no-repeat left clamp(8px, 3vw, 50px) center;
  background-size: clamp(14px, 3vw, 48px) clamp(14px, 3vw, 48px);
  display: flex;
  align-items: center;
  box-sizing: border-box;
  /* 缩小时左侧间距更小 */
  padding-left: calc(clamp(8px, 3vw, 50px)   clamp(14px, 3vw, 50px)   clamp(4px, 2vw, 20px));
}
.year .year_list li span {
  font-size: clamp(16px, 2vw, 30px);
  line-height: 1.1;
  font-weight: bold;
  color: #b5e6ff;
  margin-left: 0;
}
.year .year_list li:hover,
.year .year_list li.active {
  background: 
    url(/uploads/image/i429/tbliang.png) no-repeat left clamp(8px, 3vw, 50px) center,
    linear-gradient(to bottom, #004bbc, #0c84f4);
  background-size: clamp(14px, 3vw, 48px) clamp(14px, 3vw, 48px), cover;
}
.year .year_list li:hover span,
.year .year_list li.active span {
  color: #fff;
}
/* 内容 */
.conteont_box{
  width: 100%;                 /* 宽度自适应父容器 */
  max-width: 1200px;           /* 最大宽度限制 */
  margin: 0 auto;
  box-sizing: border-box;
}
/* 目录 */ 
.mulu{
	width: 100%;
  display: flex;
  flex-direction: column;      /* 内部盒子垂直排列 */
  align-items: stretch;       /* 内部盒子宽度自适应父容器 */
  box-sizing: border-box;
  padding-top: 55px;
  box-shadow: 3px 4px 20px 0px 
		rgba(193, 192, 192, 0.75);
  margin-bottom: 50px;
}
.mulu .title{
  height: 35px;
  display: flex;
  justify-content: center;
}
.mulu .title span {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 20px;
  margin: 0 25px;
  font-weight: bold;
  font-size: clamp(18px, 3vw, 30px);
  letter-spacing: 2px;
  color: #000;
}
.mulu .title .zuo,
.mulu .title .you {
  flex: 1;
  display: flex;
  align-items: center;
}
.mulu .title .zuo {
  justify-content: flex-end;
  background: url(/uploads/image/i429/bjz.png) no-repeat right center;
}
.mulu .title .you {
  justify-content: flex-start;
  background: url(/uploads/image/i429/bjy.png) no-repeat left center;
}
/* 目录列表 */
.mulu ul{
  margin: 30px 0;
}
.title_nr:empty {
  display: none !important;
}
.mulu .title_nr li {
  position: relative;
  padding: 0 30px 0 38px;
  font-size: clamp(14px, 2.5vw, 18px);
  line-height: 48px;
  display: flex;
  justify-content:space-between;
  color: #555;
  flex-wrap: wrap; 
}
.mulu .title_nr li a {
  display: inline-block;
  max-width: 45em;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  vertical-align: middle;
  color: #444;
  font-size: inherit;
}
.mulu .title_nr li::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 50%;
  transform: translatey(-50%);
  width: 6px;
  height: 6px;
  background: #555;
  border-radius: 50%;
  display: inline-block;
}
.mulu .title_nr li:hover {
  color: #000;
}
.mulu .title_nr li:hover a {
  color: #000;
}
.mulu .title_nr li:hover::before {
  background: #000;
}
/* 事项 */
.mulu .directory{
  line-height: 65px;
  background: linear-gradient(to right, #fff 0px 90px, #3eaaec 320px calc(100% - 320px), #fff calc(100% - 90px) 100%);
  text-align: center;
  font-size: clamp(16px, 3vw, 26px);
  color: #fff;
  margin: 35px 0 35px;
}
.mulu .shixiang{
  margin: 0 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: nowrap;
}
.mulu .shixiang .shixiang_list {
  position: relative; /* 为伪元素定位做准备 */
  border-radius: 23px;
  font-size: clamp(14px, 2vw, 20px);
  color: #003333;
  padding: 10px 15px;
  background-color: transparent; /* 默认无背景色 */
  transition: background-color 0.3s;
}
.mulu .shixiang .shixiang_list:hover {
  background-color: #1984e8;
  color: #fff;
}
.shixiang_list.active {
  background-color: #1984e8 !important;
  color: #fff !important;
}
.shixiang_list.active::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 100%;
  width: 0;
  height: 0;
  transform: translate(-50%, 0.15em);
  border-left: 19px solid transparent;
  border-right: 19px solid transparent;
  border-bottom: 25px solid #fff;
  z-index: 2;
  pointer-events: none;
}
.shixiang_list.active::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 100%;
  width: 0;
  height: 0;
  transform: translate(-50%, 0.1em);
  border-left: 19px solid transparent;
  border-right: 19px solid transparent;
  border-bottom: 24.5px solid #ccc;
  z-index: 1;
  pointer-events: none;
}
.shixiang_list.no-content,
.shixiang_list.no-content.active,
.shixiang_list.no-content:hover,
.shixiang_list.no-content:active {
  color: #999 !important;
  background: none !important;
  cursor: not-allowed !important;
  pointer-events: none !important;
  transition: none !important;
}
/* 禁用tab时三角不显示 */
.shixiang_list.no-content::after,
.shixiang_list.no-content::before {
  display: none !important;
}
.mulu .shixiang_nr{
  border: #ccc solid 1px;
  border-radius: 7px;
  margin: 25px 25px 35px;
  position: relative;
}