body {
  font-family: sans-serif;
  margin: 0;
  background: black;
}

header {
  background: #000000;
  color: white;
  padding: 0px;
  margin: 0;
  position: relative;
}
a{
    color:skyblue;
    font-weight:bold;
    text-decoration: none;
}
th{
  text-align:left;
}
.title{
  font-size:32px;
  background:rgb(255,0,255);
  color:black;
  font-weight:bold;
  margin:0;
}

.subTitle_tosho{
  font-size:18px;
  background:rgb(150, 0, 150);
  color:white;
  font-weight:bold;
  margin:0;
}

main {
  padding: 20px;
}


@media screen and (max-width: 1500px) {
.title{
font-size: 1.5em;
background:rgb(255,0,255);
color:black;
font-weight:bold;
margin:0;
}
  main h2 {
  font-size: 1.1em;
}

main h3 {
  font-size: 1em;
}

p, a {
  font-size: 0.95em;
  line-height: 1.5;
}

  main ul {
    padding-left: 20px;
    font-size: 1em;
  }
   .videoWrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9比率 */
  height: 0;
  margin-bottom: 20px;
}

.videoWrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

}