.page-lower #visual {
  background-image: url("../images/requirement/visual-bg.jpg");
}
.page-lower #visual .title:after {
  content: 'Requirement';
}

#main .title-1 {
  text-align: center;
  font-size: 3rem;
  line-height: 1.5;
  margin-bottom: 1em;
}

#main .header {
  margin-bottom: 90px;
}
#main .header .nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 1em 1.85%;
  margin-top: 50px;
}
#main .header .nav > * {
  width: 23.61%;
  min-height: 3.5em;
  display: flex;
  align-items: center;
  line-height: 1.4;
  color: var(--c-blue);
  padding: .6em .75em;
  padding-right: 50px;
  background-color: #fff;
  border: 1px solid var(--c-blue);
}
#main .header .nav .btn-2 span {
  display: block;
  text-align: left;
}
#main .header .nav > *:after {
  background-image: url("../images/common/arrow-1.png");
  border-color: var(--c-blue);
  transform: translateY(-50%) rotate(90deg);
}
@media (max-width:768px) {
  #main .header .nav > * {
    width: 49%;
    min-height: 4.2em;
  }
  #main .header .nav > *:nth-child(n+3) {
    margin-top: 2%;
  }
}

#main table.default {
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}
#main .btn-2 {
  text-align: center;
}

#main .column ~ .column {
  margin-top: 90px;
}
#main .btn {
  margin-top: 40px;
}
#main .btn > * {
  margin: 0 auto;
}
@media (max-width:768px) {
  #main .column ~ .column {
    margin-top: 60px;
  }
  #main .btn {
    margin-top: 10px;
  }
}