.left-nav {
  width: 100%;
  height: 100%;
  background-color: #F7F9FA;
  overflow-y: auto;
  transition: 0.3s;
  padding: 15px;
}
.left-nav .nav-line {
  width: 100%;
  height: 1px;
  background-color: #E8E8E8;
  margin: 10px 0;
}
.left-nav .nav-list {
  display: flex;
  flex-direction: column;
}
.left-nav .nav-list .nav-item {
  display: flex;
  align-items: center;
  color: #000;
  text-decoration: none;
  font-size: 16px;
  position: relative;
  transition: all 0.3s;
  border-radius: 4px;
  height: 40px;
  line-height: 40px;
  padding-left: 20px;
  padding-right: 20px;
  margin-bottom: 2px;
  color: #6c6c6c;
}
.left-nav .nav-list .nav-item .svg-icon {
  font-size: 20px;
  margin-right: 8px;
  color: #B5B5B5;
}
.left-nav .nav-list .nav-item .icon-default {
  color: #6c6c6c;
}
.left-nav .nav-list .nav-item .icon-active {
  display: none;
  color: #eb2c25;
}
.left-nav .nav-list .nav-item span {
  flex: 1;
}
.left-nav .nav-list .nav-item .arrow {
  flex: none;
}
.left-nav .nav-list .nav-item .arrow .svg-icon {
  font-size: 12px;
}
.left-nav .nav-list .nav-item:hover {
  color: #D32F2F;
  background-color: #FFF1F0;
}
.left-nav .nav-list .nav-item:hover .icon-default {
  display: none;
}
.left-nav .nav-list .nav-item:hover .icon-active {
  display: inline-block;
  color: #eb2c25;
}
.left-nav .nav-list .nav-item.active,
.left-nav .nav-list .nav-item.highlight {
  color: #DB2D31;
  font-weight: bold;
}
.left-nav .nav-list .nav-item.active .icon-default,
.left-nav .nav-list .nav-item.highlight .icon-default {
  display: none;
}
.left-nav .nav-list .nav-item.active .icon-active,
.left-nav .nav-list .nav-item.highlight .icon-active {
  display: block;
  color: #eb2c25;
}
.left-nav .nav-list::-webkit-scrollbar {
  width: 6px;
}
.left-nav .nav-list::-webkit-scrollbar-thumb {
  background: #E8E8E8;
  border-radius: 3px;
}
.left-nav .nav-list::-webkit-scrollbar-track {
  background: #F5F5F5;
}