.slider {
    width: 100%;
    height: 550px;
    margin: 0 auto;
    overflow: hidden;
}
/* 切换按钮 */
/* 上一个 */
.osSlider-main .slider-btn-prev {
    position: absolute;
    z-index: 30;
    top: 50%;
    left: -45px;
    width: 40px;
    height: 40px;
    text-indent: -9999px;
    margin-top: -20px;
    background: url(./img/prev.png) 50% 50% no-repeat;
    transition: all .5s linear;
}
.osSlider-main:hover .slider-btn-prev {
    left: 5px;
}
/* 下一个 */
.osSlider-main .slider-btn-next {
    position: absolute;
    z-index: 30;
    top: 50%;
    right: -45px;
    width: 40px;
    height: 40px;
    text-indent: -9999px;
    margin-top: -20px;
    background: url(./img/next.png) 50% 50% no-repeat;
    transition: all .5s linear;
}
.osSlider-main:hover .slider-btn-next {
    right: 5px;
}
/* 高亮导航部分 */
.osSlider-main .slider-nav {
    position: absolute;
    width: 100%;
    height: 22px;
    bottom: 40px;
    text-align: center;
    z-index: 25;
}
.osSlider-main .slider-nav li {
    display: inline-block;
    height: 20px;
    line-height: 20px;
    padding: 0 6px;
    margin: 0 12px;
    font-size: 12px;
    background: #000;
    border-radius: 50%;
    color: #fff;
    border: 1px solid #000;
    cursor: pointer;
}
.osSlider-main .slider-nav li.active {
    border: 1px solid #f39009;
    background: #f39009;
    color: #fff;
}
.osSlider-main .slider-nav li:hover {
    border: 1px solid #f39009;
    color: #fff;
    background: #f39009;
}