* {
    margin: 0;
    padding: 0;
}
ul {
    list-style: none;
}
.wrapper {
    width: 1000px;
    height: 475px;
    margin: 0 auto;
    margin-top: 100px;
}

.tab {
    border: 1px solid #ddd;
    border-bottom: 0;
    height: 36px;
    width: 320px;
}

.tab li {
    position: relative;
    float: left;
    width: 80px;
    height: 34px;
    line-height: 34px;
    text-align: center;
    cursor: pointer;
    border-top: 4px solid #fff;
}

.tab span {
    position: absolute;
    right: 0;
    top: 10px;
    background: #ddd;
    width: 1px;
    height: 14px;
    overflow: hidden;
}

.products {
    width: 1002px;
    border: 1px solid #ddd;
    height: 476px;
}

.products .main {
    float: left;
    display: none;
}

.products .main.selected {
    display: block;
}

.tab li.active {
    border-color: red;
    border-bottom: 0;
}
