body {
  font-family: "Times New Roman", Times, serif;
}

nav {
  font-size: 13px;
}
.text-tnr {
  font-family: "Times New Roman", Times, serif;
}
.text-jp {
  font-family: "Noto Sans JP", sans-serif;
}

.text-noto-jp {
  font-family: "Noto Serif JP", serif;
  font-optical-sizing: auto;
}

.text-roboto {
  font-family: "Roboto", sans-serif;
}

.page-title {
  font-size: 24px;
  position: relative;
  letter-spacing: 0.1em;
  font-weight: 500;
  padding: 0 0 7px;
  line-height: 1.8em;
}
.page-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  margin-left: -15px;
  width: 30px;
  border: 1px solid black;
  font-size: 24px;
}

@media screen and (max-width: 768px) {
  .page-title {
    font-size: 14px;
  }
}