.bg {
    position: absolute;
    z-index: -10;
    width: 100vw;
}

.circle-base {
    border-radius: 50%;
    filter: blur(5px);
}

.little-sample-2 {
	position: absolute;
	left: 50%;
	top: 50%;
	transform: translate(-50%,-50%);
	width: 30%;
	padding-top: 30%;
	margin: 100px auto;
	overflow: hidden;
	z-index: 10;
}
.little-sample-2:after {
	content: '';
	display: block;
	width: 85%;
	padding-top: 85%;
	border: solid 2px #000;
	border-radius: 50%;
	position: absolute;
	left: 50%;
	top: 50%;
	transform: translate(-50%,-50%);
	z-index: 1;
}

.little-sample-1 {
	position: absolute;
	left: 50%;
	top: 50%;
	transform: translate(-50%,-50%);
	width: 50%;
	padding-top: 50%;
	margin: 100px auto;
	overflow: hidden;
	z-index: 10;
}
.little-sample-1:after {
	content: '';
	display: block;
	width: 85%;
	padding-top: 85%;
	border: solid 2px #000;
	border-radius: 50%;
	position: absolute;
	left: 50%;
	top: 50%;
	transform: translate(-50%,-50%);
	z-index: 1;
}

.sample-1 {
	position: relative;
	width: 70%;
	padding-top: 70%;
	margin: 20px auto;
	overflow: hidden;
}
.sample-1:after {
	content: '';
	display: block;
	width: 85%;
	padding-top: 85%;
	border: solid 2px #000;
	border-radius: 50%;
	position: absolute;
	left: 50%;
	top: 50%;
	transform: translate(-50%,-50%);
	z-index: 1;
}
.rotate {
	width: 100%;
	height: 100%;
	position: absolute;
	left: 50%;
	top: 50%;
	transform: translate(-50%,-50%);
	z-index: 2;
}
.rotate .rotate-ctn{
	position: relative;
	width: 100%;
	height: 100%;
	animation: 100s linear big-circle infinite;	/* 大枠を回転させているアニメーション */
}
.rotate .box {
	position: absolute;
	width: 100px;
	height: 50%;
	transform-origin: 50% 100%;
}
/* 各コンテンツの文字を上向きにする */
.rotate .box.box-1 { left: 50%; transform: translate(-50%, 0);}
.rotate .box.box-2 { left: 50%; transform: translate(-50%, 0) rotate(45deg);}
.rotate .box.box-3 { left: 50%; transform: translate(-50%, 0) rotate(90deg);}
.rotate .box.box-4 { left: 50%; transform: translate(-50%, 0) rotate(135deg);}
.rotate .box.box-5 { left: 50%; transform: translate(-50%, 0) rotate(180deg);}
.rotate .box.box-6 { left: 50%; transform: translate(-50%, 0) rotate(225deg);}
.rotate .box.box-7 { left: 50%; transform: translate(-50%, 0) rotate(270deg);}
.rotate .box.box-8 { left: 50%; transform: translate(-50%, 0) rotate(315deg);}
.rotate .box .parts {
	position: relative;
	width: 80%;
	margin: 0 auto;
	padding: 20px 0;
	background: #eee;
	text-align: center;
}
/* 各コンテンツを回転させるアニメーション */
.rotate .box.box-1 .parts { animation: 100.0s linear circle1 infinite;}
.rotate .box.box-2 .parts { animation: 100.0s linear circle2 infinite;}
.rotate .box.box-3 .parts { animation: 100.0s linear circle3 infinite;}
.rotate .box.box-4 .parts { animation: 100.0s linear circle4 infinite;}
.rotate .box.box-5 .parts { animation: 100.0s linear circle5 infinite;}
.rotate .box.box-6 .parts { animation: 100.0s linear circle6 infinite;}
.rotate .box.box-7 .parts { animation: 100.0s linear circle7 infinite;}
.rotate .box.box-8 .parts { animation: 100.0s linear circle8 infinite;}

/* keyframesは下に記述 */
@keyframes big-circle {
 0% { transform: rotate(0deg);}
 100% { transform:rotate(360deg);}
}
@keyframes circle1 {
 0% { transform: rotate(0deg);}
 100% { transform: rotate(-360deg);}
}
@keyframes circle2 {
 0% { transform: rotate(315deg);}
 100% { transform: rotate(-45deg);}
}
@keyframes circle3 {
 0% { transform: rotate(270deg);}
 100% { transform: rotate(-90deg);}
}
@keyframes circle4 {
 0% { transform: rotate(225deg);}
 100% { transform: rotate(-135deg);}
}
@keyframes circle5 {
 0% { transform: rotate(180deg);}
 100% { transform: rotate(-180deg);}
}
@keyframes circle6 {
 0% { transform: rotate(135deg);}
 100% { transform: rotate(-225deg);}
}
@keyframes circle7 {
 0% { transform: rotate(90deg);}
 100% { transform: rotate(-270deg);}
}
@keyframes circle8 {
 0% { transform: rotate(45deg);}
 100% { transform: rotate(-315deg);}
}