.title {
  font-size: 2.5rem;         /* 40px */
  text-align: center;
  margin-top: 2.5rem;        /* 40px */
  font-weight: bold;
}

.title_line {
  border-bottom: 0.3125rem solid black;  /* 5px */
  border-radius: 0.125rem;               /* 2px */
  width: 6.25rem;                        /* 100px */
  margin: 0 auto;
}