.l-main {
  max-width: 800px;
  margin: auto;
}

.sk_ttl {
  text-align: center;
  background: #EDEFF0;
  margin: 0 calc(50% - 50vw) 60px;
  width: 100vw;
  padding: 40px 0;
}
.sk_ttl h2 {
  font-family: kozuka-gothic-pr6n, sans-serif;
  font-weight: normal;
  font-size: 24px;
  letter-spacing: 0.2em;
  line-height: 1;
  margin: 0;
}