label{z-index:999999999;}

.input-hidden {
  position: absolute;
  left: -9999px;
}

input[type=radio]:checked + .osv1_1_1 {
  background: url(//cdn.weaversmind.com/edu/img/211005/1-1_on.png);
  background-size: 100% 100%;
}
.osv1_1_1{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/1-1_off.png);
	background-size: 100% 100%;
}
input[type=radio]:checked + .osv1_1_2 {
  background: url(//cdn.weaversmind.com/edu/img/211005/1-2_on.png);
  background-size: 100% 100%;
}
.osv1_1_2{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/1-2_off.png);
	background-size: 100% 100%;
}
input[type=radio]:checked + .osv1_1_3 {
  background: url(//cdn.weaversmind.com/edu/img/211005/1-3_on.png);
  background-size: 100% 100%;
}
.osv1_1_3{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/1-3_off.png);
	background-size: 100% 100%;
}

input[type=radio]:checked + .osv1_1_4 {
  background: url(//cdn.weaversmind.com/edu/img/211005/1-4_on.png);
  background-size: 100% 100%;
}
.osv1_1_4{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/1-4_off.png);
	background-size: 100% 100%;
}

input[type=radio]:checked + .osv1_1_5 {
  background: url(//cdn.weaversmind.com/edu/img/211005/1-5_on.png);
  background-size: 100% 100%;
}
.osv1_1_5{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/1-5_off.png);
	background-size: 100% 100%;
}

input[type=radio]:checked + .osv1_1_6 {
  background: url(//cdn.weaversmind.com/edu/img/211005/1-6_on.png);
  background-size: 100% 100%;
}
.osv1_1_6{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/1-6_off.png);
	background-size: 100% 100%;
}


input[type=radio]:checked + .osv1_2_1 {
  background: url(//cdn.weaversmind.com/edu/img/211005/2-1_on.png);
  background-size: 100% 100%;
}
.osv1_2_1{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/2-1_off.png);
	background-size: 100% 100%;
}
input[type=radio]:checked + .osv1_2_2 {
  background: url(//cdn.weaversmind.com/edu/img/211005/2-2_on.png);
  background-size: 100% 100%;
}
.osv1_2_2{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/2-2_off.png);
	background-size: 100% 100%;
}
input[type=radio]:checked + .osv1_2_3 {
  background: url(//cdn.weaversmind.com/edu/img/211005/2-3_on.png);
  background-size: 100% 100%;
}
.osv1_2_3{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/2-3_off.png);
	background-size: 100% 100%;
}


input[type=radio]:checked + .osv1_3_1 {
  background: url(//cdn.weaversmind.com/edu/img/211005/3-1_on.png);
  background-size: 100% 100%;
}
.osv1_3_1{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/3-1_off.png);
	background-size: 100% 100%;
}
input[type=radio]:checked + .osv1_3_2 {
  background: url(//cdn.weaversmind.com/edu/img/211005/3-2_on.png);
  background-size: 100% 100%;
}
.osv1_3_2{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/3-2_off.png);
	background-size: 100% 100%;
}
input[type=radio]:checked + .osv1_3_3 {
  background: url(//cdn.weaversmind.com/edu/img/211005/3-3_on.png);
  background-size: 100% 100%;
}
.osv1_3_3{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/3-3_off.png);
	background-size: 100% 100%;
}

input[type=radio]:checked + .osv1_3_4 {
  background: url(//cdn.weaversmind.com/edu/img/211005/3-4_on.png);
  background-size: 100% 100%;
}
.osv1_3_4{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/3-4_off.png);
	background-size: 100% 100%;
}

input[type=radio]:checked + .osv1_3_5 {
  background: url(//cdn.weaversmind.com/edu/img/211005/3-5_on.png);
  background-size: 100% 100%;
}
.osv1_3_5{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/3-5_off.png);
	background-size: 100% 100%;
}

input[type=radio]:checked + .osv1_4_1 {
  background: url(//cdn.weaversmind.com/edu/img/211005/4-1_on.png);
  background-size: 100% 100%;
}
.osv1_4_1{
	z-index:999;
	width:100%;
	height: calc(60vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/4-1_off.png);
	background-size: 100% 100%;
}
input[type=radio]:checked + .osv1_4_2 {
  background: url(//cdn.weaversmind.com/edu/img/211005/4-2_on.png);
  background-size: 100% 100%;
}
.osv1_4_2{
	z-index:999;
	width:100%;
	height: calc(60vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/4-2_off.png);
	background-size: 100% 100%;
}
input[type=radio]:checked + .osv1_4_3 {
  background: url(//cdn.weaversmind.com/edu/img/211005/4-3_on.png);
  background-size: 100% 100%;
}
.osv1_4_3{
	z-index:999;
	width:100%;
	height: calc(60vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/4-3_off.png);
	background-size: 100% 100%;
}

input[type=radio]:checked + .osv1_4_4 {
  background: url(//cdn.weaversmind.com/edu/img/211005/4-4_on.png);
  background-size: 100% 100%;
}
.osv1_4_4{
	z-index:999;
	width:100%;
	height: calc(60vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/4-4_off.png);
	background-size: 100% 100%;
}



input[type=checkbox]:checked + .osv1_5_1 {
  background: url(//cdn.weaversmind.com/edu/img/211005/5-1_on.png);
  background-size: 100% 100%;
}
.osv1_5_1{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/5-1_off.png);
	background-size: 100% 100%;
}
input[type=checkbox]:checked + .osv1_5_2 {
  background: url(//cdn.weaversmind.com/edu/img/211005/5-2_on.png);
  background-size: 100% 100%;
}
.osv1_5_2{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/5-2_off.png);
	background-size: 100% 100%;
}
input[type=checkbox]:checked + .osv1_5_3 {
  background: url(//cdn.weaversmind.com/edu/img/211005/5-3_on.png);
  background-size: 100% 100%;
}
.osv1_5_3{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/5-3_off.png);
	background-size: 100% 100%;
}

input[type=checkbox]:checked + .osv1_5_4 {
  background: url(//cdn.weaversmind.com/edu/img/211005/5-4_on.png);
  background-size: 100% 100%;
}
.osv1_5_4{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/5-4_off.png);
	background-size: 100% 100%;
}

input[type=checkbox]:checked + .osv1_5_5 {
  background: url(//cdn.weaversmind.com/edu/img/211005/5-5_on.png);
  background-size: 100% 100%;
}
.osv1_5_5{
	z-index:999;
	width:100%;
	height: calc(75vw * 270.0 / 1280.0);
	background: url(//cdn.weaversmind.com/edu/img/211005/5-5_off.png);
	background-size: 100% 100%;
}