.sidebar-nav-parent-li {
  position: relative;
}

.sidebar-nav {
  padding-right: 10px;
}

/* 固定侧边栏 */
.sidebar {
  position: fixed;
}
.sidebar-toggle {
  position: fixed;
}

.sidebar-nav .ul-after {
  content: "";
  width: 10px;
  height: 30px;
  /* background: red; */
  position: absolute;
  right: 10px;
  top: 0px;
  display: flex;
  align-items: center;
}

.ul-after-sanjiao {
  width: 0;
  height: 0;
  border-left: 8px solid #cecece;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  transition: transform 0.3s;
  position: relative;
}

.ul-after-sanjiao::after {
  content: "";
  width: 0;
  height: 0;
  position: absolute;
  top: -8px;
  left: -11px;
  border-left: 8px solid #fff;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
}

.ul-after-sanjiao:hover {
  border-left: 8px solid #42b983;
}

.sidebar-nav-parent-li-shouqi .ul-after-sanjiao {
  transform: rotate(90deg);
  transition: transform 0.3s;
}