* {
    margin: 0;
    padding: 0;
}

.slide {
    max-width: 100%;
    height: auto;
    margin: 0 auto;
    position: relative;
    z-index: 99;
    overflow: hidden;
}

.slide ul {
    width: 10000%;
    list-style-type: none;
}

.next_btn {
    position: absolute;
    width: 25px;
    height: 26px;
    line-height: 26px;
    text-align: center;
    opacity: .5;
    vertical-align: middle;
    background: rgba(0, 0, 0);
    right: 5px;
    top: 50%;
    color: #fff;
    font-family: arial;
    font-size: 20px;
    font-weight: 700;
    display: inline-block;
    cursor: pointer;
}

.prev_btn {
    position: absolute;
    width: 25px;
    height: 26px;
    line-height: 26px;
    text-align: center;
    opacity: .9;
    vertical-align: middle;
    background: rgba(0, 0, 0, .1);
    left: 5px;
    top: 50%;
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    display: inline-block;
    cursor: pointer;
}

.slide ul:after {
    content: '';
    clear: both;
    display: block;
}

.slide ul li {
    float: left;
    text-align: center;
}

.slide ul li img {
    vertical-align: middle;
    max-width: 100%;
}

.slide .circle_btn {
    position: absolute;
    bottom: 15px;
    text-align: center;
    left: 0;
    display: table;
    margin: 0 auto;
    width: 100%;
}

.slide .circle_btn button {
    width: 10px;
    height: 10px;
    box-sizing: content-box;
    outline: none;
    border: 0;
    background: #fff;
    margin: 2px 5px;
    overflow: hidden;
    transition: all .6s;
    cursor: pointer;
    border-radius: 50%;
}

.slide .circle_btn button.active {
    background: #B20718;
}