.links .linkdl dt {
    border: 1px solid #ebeef5;
    height: 34px;
    line-height: 34px;
    font-size: 14px;
    padding-left: 10px;
    cursor: pointer;
    background: url(../images/hd01.jpg) repeat-x;
    border-left: none;
    border-right: none;
}

.links .linkdl {
    width: 25%;
    float: left;
    margin-right: 0;
}
.links .linkdl dd a {
    width: 100%;
    display: block;
    text-align: center;
    border-bottom: 1px solid #fff;
    background: url(../images/bd01.jpg);
}
.links .linkdl dd {
    display: none;
    width: calc(100% - 2px);
    position: absolute;
    background: #fff;
    bottom: 34px;
    z-index: 1;
    line-height: 34px;
    border: 1px solid #ebeef5;
    border-bottom: 0px;
}