* {
    padding: 0;
    margin: 0;
}

.box {
    width: 100%;
    height: 100%;
    margin: auto;
    overflow: hidden;
}

.box ul {
    position: relative;
    width: 100%;
    height: 40px;
    margin-left: -1px;
    list-style: none;
    border-bottom: 1px solid #e5e5e5;
}

.box li {
    height: 40px;
    text-align: center;
    font: 600 18px/40px "simsun";
    cursor: pointer;
}

span {
    display: none;
    width: 100%;
    height: 259px;
    text-align: center;
    font: 700 100px/160px "simsun";
}

.show {
    display: block;
}

.current {
    background-color: #fff;
    color: #188d44;
}

.box ul a {
    position: absolute;
    right: 0px;
    top: 26px;
    width: 26px;
    height: 26px;
}