.points {
    position: absolute;
    z-index: 5;
    list-style: none;
    width: 20%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: hsla(0,0%,0%,0.2);
    bottom: 5px;
    left: 40%;
    height: 20px;
    border-radius: 25px;
    right: 40%;
}

.points li {
	cursor: pointer;
	display: inline-block;
	width: 10px;
	height: 10px;
	margin: 0px auto;
	border-radius: 15px;
	background-color: cadetblue;
}

.active {
    background-color: hsla(0,0%,100%,1.00);
}

.prev {

	border-radius: 0 30px 30px 0;
}

.next,
.prev {
    appearance: menu;
    margin: 0 auto;
    width: 40px;
    display: block;
    float: left;
    height: 40px;
    position: absolute;
	line-height: 40px;
	text-align: center;
	font-family: "宋体";
	color: aliceblue;
    z-index: 999;
    background-color: hsla(0,0%,0%,0.1);
    top: 45%;
    -webkit-appearance: button;
    cursor: pointer;
}

.next {
	right: 0px;
	border-radius: 30px 0 0 30px;
}
.prev:hover{background-color: hsla(0,0%,0%,0.5);}
.next:hover{background-color: hsla(0,0%,0%,0.5);}