.wrap {
    width:800px;
    margin:0 auto;
}

.menu {
    margin:0;
    padding:0;
}

.menu li {
    float:left;
    margin-right:10px;
    list-style:none;
}

.menu li a {
    display:block;
    padding:10px 20px;
    color:#fff;
    background:#000;
    cursor:pointer;
}

.subInner {
    display:none;
    padding:10px;
    background:#f19c75;
}

.subContent h4 {
    margin:10px 0;
    padding:10px;
    line-height:20px;
    color:#fff;
    background:#000;
    cursor:pointer;
}

.subContent h4 span {
    display: block;
    background:url('images/arrow.png') 100% 0% no-repeat;
}

.subContent h4 span.open {
    background:url('images/arrow.png') 100% 100% no-repeat;
}