main h1,
.tab-menu {
  background-color: #184e18;
}

main h1 span::after {
  content: "SHOTO JUNIOR HIGH SCHOOL";
}

.mv {
  background: url(../img/mv_sp.jpg) no-repeat center top / 100%;
}

@media (min-width: 768px) {
  .mv {
    background: url(../img/mv_pc.jpg) no-repeat center top / 100%;
  }
}

.tab-menu {
  width: calc((100% - 30px) / 4);
}

.school_name img {
  width: 51px;
}

.school_name img {
  width: 51px;
}