.top_contents p{
    margin: 5px;
}
.downloadExplanation{
    margin-top: 5px;
    margin-left: 10px;
}
.downloadExplanation span{
    display: inline-block;
    width: 75px;
}
.downloadExplanation p{
    margin-bottom: 0;
    margin-top: 0;
}

.top_contents ol li{
    list-style-type: decimal;
}
.top_contents ol,.top_contents ul{
    margin-top: 5px;
}
.top_contents ul{
    padding: 5px;
}
#playerOperation li{
    list-style-type: circle;
    margin-left: 2.5%;
}
h3{
    margin: 5px;
}

#downloadImg{
    height: 25px;
    padding-right: 10px;
    float: left;
}

/*--------------------------------------
       ボタン用CSS
----------------------------------------*/
.btn,
a.btn,
button.btn {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.0;
  position: relative;
  display: inline-block;
  padding: 0.5rem 1rem;
  cursor: pointer;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
  text-align: center;
  vertical-align: middle;
  text-decoration: none;
  letter-spacing: 0.1em;
  color: #212529;
  border-radius: 0.5rem;
  margin-right: 5px;
  margin-left: 1vw;
  margin-bottom: 0px;
}
a.btn--orange {
    color: #fff;
    background-color: #eb6100;
    border-bottom: 5px solid #b84c00;
}
a.btn--orange:hover {
    margin-top: 3px;
    color: #fff;
    background: #f56500;
    border-bottom: 2px solid #b84c00;
}
a.btn--shadow {
    -webkit-box-shadow: 0 3px 5px rgba(0, 0, 0, .3);
    box-shadow: 0 3px 5px rgba(0, 0, 0, .3);
}

.wrap_contents{
    display: flex;
}
.wrap_contents p{
    padding-left: 5px;
}

@media(max-width:680px){
    .wrap_contents{
        display: block;
    }
    video{
        width: 100%;
    }
    #playerOperation li{
        margin-left: 5%;
    }
}