* {
    margin: 0;
    padding: 0
}

body {
    background-color: #f0f0f0
}

.slider {
    width: 1200px;
    position: relative;
    padding-top: 50vh;
    margin: 20px auto 100px;
    padding-left: 250px;
}

.slider .banner_big {
    position: absolute;
    left: 0;
    top: 0;
    transition: all .5s
}

.slider input[name=slide_switch] {
    display: none
}

.slider label {
    width: 100px;
    height: 100px;
    overflow: hidden;
    border-radius: 1000px;
    margin: 18px 0 0 18px;
    border: 3px solid #999;
    float: left;
    cursor: pointer;
    transition: all .5s;
    z-index: 10;
}

.slider label img {
    width: 100%;
    height: 100%;
    display: block
}

.slider input[name=slide_switch]:checked+label {
    border-color: #666;
    opacity: 1
}

.slider input[name=slide_switch]~img {
    opacity: 0;
    transform: scale(1.1)
}

.slider input[name=slide_switch]:checked+label+img {
    opacity: 1;
    transform: scale(1)
}

.label_main {
    position: relative;
}

.label_main p {
    position: absolute;
    top: 0;
    left: 0;
    text-align: center;
    line-height: 106px;
    width: 106px;
    background: #d7eaf9;
}

.slider input[name=slide_switch]:checked+label p {
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
}

.banner_big {
    width: 1200px;
    height: 60vh;
    z-index: 2;
}