.left_nav {
  width: 200px;
  height: 204px;
  background-color: #FFF;
  float: left;
}

.left_nav ul li {
  width: 200px;
  height: 50px;
  border-bottom: 1px solid #eaeaea
}

.left_nav ul li a {
  display: block;
  width: 200px;
  height: 50px;
  text-align: center;
  line-height: 50px;
  font-size: 14px;
  color: #2b2b2b;
}

.left_nav_crurent {
  width: 196px;
  color: #1c83df;
  font-weight: bold;
  border-left: 4px solid #1c83df;
}