@charset "utf-8";
/* init */
html,body {
    width: 100%;
    height: 100%;
}
ul,body {
    margin: 0;
}

/* content */
.content {
    position: relative;
    overflow: hidden;
    width: 100px;
    height: 200px;
    margin: 0 auto;
    user-select: none;
    cursor: pointer;
}
.content .leftBtn,
.content .rightBtn {
    position: absolute;
    top: 0;
    bottom: 0;
    margin: auto;
    width: 40px;
    background-color: rgba(204,204,204,.5);
    color: #fff;
    font-size: 40px;
    text-align: center;
    z-index: 10;
}
.content .leftBtn {
    left: 0;
}
.content .rightBtn {
    right: 0;
}
.content .points {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 30px;
    margin: auto;
    text-align: center;
}
.content em {
    display: inline-block;
    width: 20px;
    height: 20px;
    background-color: rgba(204,204,204,.8);
    border-radius: 50%;
}
.content em:hover {
    background-color: #333;
}
.content em+em {
    margin-left: 10px;
}
ul {
    position: absolute;
    list-style: none;
    padding: 0;
    font-size: 0;
    transition: all 1s;
}
li {
    display: inline-block;
}