.exp-content .exp-container{
    height:100%;
    overflow:hidden;
    margin:0 auto;
}
/* 左选择栏 */
.exp-content .exp-container .content-l{
    width:18%;
    height:100%;
    overflow:hidden;
    float:left; 
    display:inline;
    margin-right: 3%;
    position: relative;
}
.exp-container .content-l dt{
    margin:52px 0 20px 0;
    padding-left: 50px;
    overflow: hidden;
    text-overflow:ellipsis;
    white-space: nowrap;
}
.exp-container .content-l dd{
    padding: 20px 20px 20px 50px;
    position: relative;
    overflow: hidden;
    text-overflow:ellipsis;
    white-space: nowrap;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
.exp-container .content-l .on::after {
    content: "";
    position: absolute;
    width:5px;
    height:50%;
    opacity:1;
    top:25%;
    right:0;
    transform: scaleY(1);
    transform-origin:0;
}
.content-r{
    width:70%;
    margin-left:20%;
    padding:20px;
}
.opt-btn{  
    padding:8px;  
    color: #d9eef7!important;
    border: solid 1px #0076a3;
    background: #0095cd;
    background: -webkit-gradient(linear, left top, left bottom, from(#00adee), to(#006eff));
    background: -moz-linear-gradient(top, #00adee, #0078a5);
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#00adee', endColorstr='#0078a5');
    outline: none;
    cursor: pointer;
    text-decoration: none!important;
    text-shadow: 0 1px 1px rgba(0,0,0,.3);
    -webkit-border-radius: .5em;
    -moz-border-radius: .5em;
    border-radius: .5em;
    -webkit-box-shadow: 0 1px 2px rgba(0,0,0,.2);
    -moz-box-shadow: 0 1px 2px rgba(0,0,0,.2);
    box-shadow: 0 1px 2px rgba(0,0,0,.2);
}
.opt-btn:hover{
    background: #007ead;
    background: -webkit-gradient(linear, left top, left bottom, from(#0095cc), to(#1A2DDF));
    background: -moz-linear-gradient(top, #0095cc, #00678e);
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#0095cc', endColorstr='#00678e');
}