main {
  background: linear-gradient(to right, #fff 0%, #fff 60%, #f4f7f4 60%, #f4f7f4 100%);
}
main > div:first-child {
  max-width: 900px;
  padding: 60px 20px;
  margin: 0 auto;
}
main > div:first-child p {
  padding-bottom: 1em;
}

section.ttl {
  border-bottom: 3px solid #03ac4b;
}

@media screen and (max-width: 980px) {
  section.ttl {
    margin-top: 64px;
  }
}