/* nav */
.web-title {
  /* 设置当前定位的背景色 */
  background-color: #59BCEF;
}

.nav {
  /* 导航栏 */
  height: 60px;
  background-color: #0a9ce7;
  z-index: 999;
  width: 100%;
}

.nav-list {
  /* 目录与左侧的距离 */
  width: 1200px;
  height: 60px;
}

.nav-list>li {
  /* 目录之间的样式 */
  position: relative;
  float: left;
  margin-right: 10px;
}

.nav-list>li>div {
  /* 包裹目录的块 */
  height: 60px;
  text-align: center;
}

.nav-list>li:last-child {
  margin-right: 0;
}

.nav-list a {
  display: block;
}

.nav-list>li>div>a>p {
  /* 目录的文字样式 */
  font-size: 18px;
  font-weight: bold;
  line-height: 60px;
  letter-spacing: 0px;
  color: #fff;
  padding: 0 21px;
}

.nav-list>li>div:hover {
  /* 当鼠标移动到目录时，出现的样式 */
  background-color: #59BCEF;
}

/* 二级三级四级nav */
.sec,
.thr,
.four {
  /* 设置下拉菜单的优先级 */
  z-index: 999;
}

.sec {
  /* 将下拉菜单隐藏 */
  display: none;
}

.sec,
.thr,
.four {
  /* 设置下拉菜单的样式 */
  display: none;
  min-width: 202px;
  position: absolute;
  background-color: #ffffff;
  border: 1px solid #D0DAE4;
}
.sec {
  margin-top: -1px;
  border-top: none;
}

.sec>li,
.thr>li,
.four>li {
  /* 设置二三级菜单之间的距离 */
  position: relative;
  min-width: 202px;
  height: 50px;
  cursor: pointer;
}

.sec>li:last-child,
.thr>li:last-child,
.four>li:last-child {
  /* 设置从一级菜单到三级菜单最后的一个目录距离目录底部的外边距 */
  margin-bottom: 10px;
}

.thr,
.four {
  top: 0;
  left: 100%;
}

.sec>li>a,
.thr>li>a,
.four>li>a {
  font-size: 18px;
  font-weight: normal;
  letter-spacing: 0px;
  color: #999999;
  line-height: 50px;
  padding-left: 24px;
  white-space: nowrap;
  padding-right: 20px;
}

.sec>li:hover #k0,
.thr>li:hover #k9,
.four>li:hover #k2 {
  color: #0a9ce7;
  border-left: 4px solid #0a9ce7;
  padding-left: 20px;
}