.imgWrap {
	overflow: hidden;	/*拡大時にはみ出た部分を隠す*/
	width: 320px;	/*画像の幅*/
	height: 180px;	/*画像の高さ*/
}
.imgWrap img {
	display: block;
	transition-duration: 0.3s;	/*変化に掛かる時間*/
}
.imgWrap img:hover {
	transform: scale(1.1);	/*画像の拡大率*/
	transition-duration: 0.3s;	/*変化に掛かる時間*/
}

.contents {
  overflow: hidden;
  width: 650px;
  height: 400px;
  margin: 0 auto;
  padding: 0;
  box-sizing: border-box;
  display: flex;
  position:absolute;
  top:5%; 
  left:10%;
}
.nav {
  width: 150px;
  margin: 0;
  padding: 0;
}
.nav li {
  position: relative;
  width: 150px;
  height: 40px;
}
.nav > li {
  border-bottom: none;
}
.nav li:last-child {
  border-bottom: none;
}
.nav li:hover > ul > li {
  border-bottom: none;
}
.nav li > ul > li:last-child {
  border-bottom: none;
}
.nav li a {
  display: block;
  width: 150px;
  height: 40px;
  color: #000;
  font-size: 14px;
  font-weight: bold;
  line-height: 2.8;
  padding: 0 5px;
  /*background: #CCCCFF;*/
  background: #CCCCFF;
  border-bottom: 1px solid #eee;
  box-sizing: border-box;
  text-decoration: none;
  opacity:0.7;
}
.nav > li:hover > a {/*layer-1*/
  color: orange;
  background: #afc6e2;
}
.nav > li li:hover > a {/*layer-2*/
  color: olive;
  background: #afc6e2;
}
.nav li:hover > ul > li {
  overflow: visible;
  top: -40px;
  left: 110px;
  height: 40px;
}
.nav li ul li {
  overflow: hidden;
  height: 0;
  left: 110px;
  list-style: none;
}
.nav li ul li a {
  background: #CCCCFF;
}
.nav li ul:before {
  position: absolute;
  content: "";
  top: 14px;
  left: 140px;
  border: 5px solid transparent;
  border-left: 5px solid #fff;
}
.nav li:hover ul li ul li:hover > a {/*layer-3*/
  color: pink;
  background: #afc6e2;
}
.content {
  width: 700px;
  height: 250px;
  background: #eee;
  margin: 0;
  padding: 10px;
  text-align: left;
  box-sizing: border-box;
}
.koukaMusic {
	position:absolute;
	bottom:15%; right:40%;
	background-color:#f0e68c;
}