/* 外枠黄色 */
.booklink-box, .kaerebalink-box {
  padding:25px;
  margin-bottom: 10px;
  border:solid 1px #f1c40f;
  overflow: hidden;
  font-size:small;
}

/* 外枠緑色 */
.booklink-box, .kaerebalink-box {
  padding:25px;
  margin-bottom: 10px;
  border:solid 1px #1abc9c;
  overflow: hidden;
  font-size:small;
}

/* 外枠赤色 */
.booklink-box, .kaerebalink-box {
  padding:25px;
  margin-bottom: 10px;
  border:solid 1px #e74c3c;
  overflow: hidden;
  font-size:small;
}

/* 外枠青色 */
.booklink-box, .kaerebalink-box {
  padding:25px;
  margin-bottom: 10px;
  border:solid 1px #3498db;
  overflow: hidden;
  font-size:small;
}