.banner {
    position: relative;
    overflow: hidden;
}

.banner .slick-arrow {
    position: absolute;
    font-size: 0;
    top: 50%;
    z-index: 12;
    width: 100px;
    height: 100px;
    margin-top: -42px;
    border: 0;
}


.banner .slick-prev {
    outline: none;
    position: absolute;
    top: 50%;
    width: 73px;
    height: 73px;
    z-index: 9;
    opacity: .5;
    text-align: center;
    margin-top: -40px;
    transition: .8s;
    background: url(../images/c_prev.png) no-repeat;
    left: 5%;
    opacity: 0;
    cursor: pointer;
}

.banner .slick-next {
    outline: none;
    position: absolute;
    top: 50%;
    width: 73px;
    height: 73px;
    z-index: 9;
    opacity: .5;
    text-align: center;
    margin-top: -40px;
    transition: .8s;
    background: url(../images/c_next.png) no-repeat;
    right: 5%;
    opacity: 0;
    cursor: pointer;
}

.banner:hover .slick-prev {
    left: 10%;
    opacity: 0.5;
}

.banner:hover .slick-next {
    right: 10%;
    opacity: 0.5;
}

.banner img {
    display: block;
    width: 100%;
    margin: 0 auto;
}

.slick-dots {
    position: absolute;
    left: 0;
    font-size: 0;
    bottom: 5%;
    width: 100%;
    text-align: center;
    outline: none;

}

.slick-dots li {
    display: inline-block;
    margin: 0 15px;
    outline: none;
}

.slick-dots li button {
    display: block;
    border: 0 none;
    width: 15px;
    height: 15px;
    color: #fff;
    border-radius: 50%;
    background-color: #007aff;
    outline: none;
    transition: .5s;
}

.slick-dots .slick-active button {
    background-color: #007aff;
    width: 60px;
    border-radius: 30px;
}


.bd ul li:last-child {
    margin-right: 0;
}