/* 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;}


/* 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;
}

/* Button */
div.buttonbox {
    margin: 30px auto;
    text-align: center;
}

div.button {
  background: #000;
  color: #f8c153;
  font-size: 17px;
  line-height: 1.5;
  padding: 20px 55px;
  border-radius: 32.5px;
  text-decoration: none;
  display: inline-block;
  -webkit-transition: .3s;
  -o-transition: .3s;
  transition: .3s;
  font-weight: bold;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  text-align: center;
}
div.button:hover {
  background: #fde1b0; 
  color: #000; 
}
div.button p {
  padding: 20px auto;
  font-weight: bold;
  font-size: 14px;
}