/* BR */

@media screen and (min-width: 680px){   
  .pc { display:block; }
  .sp { display:none; }
}
@media screen and (max-width: 680px){   
  .pc { display:none; }
  .sp { display:block; }
}

/* base */
main#topics a {
  text-decoration: underline;
  color: #0066ff;
}
.center {
 text-align: center;
}
.bold {font-weight: bold;}
.red {color: #da0000;}
.end {margin: 40px auto; text-align: center; color: #ff0000; font-weight: 900;}

/* Subbox */
.subbox {
  margin: 20px;
  padding: 20px;
  border: solid 1px #000;
}

.subbox h4 {
  font-size:1.3em;
  font-weight: bold;
  padding: 20px 0;
  line-height: 1.3em;
}