body {
  margin: 0;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  color: #2f3540;
  background: #ffffff;
  line-height: 1.7;
}

* {
  box-sizing: border-box;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  width: 100%;
  display: block;
}

.page-header {
  background: #ffffff;
  border-bottom: 1px solid #e4e8ee;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-container,
.bottom-container,
.footer-container {
  max-width: 1100px;
  width: min(92%, 1100px);
  margin: 0 auto;
}

.header-cat {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.header-logo {
  font-size: 22px;
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.04em;
  color: #183153;
}

.pc-nav-ul {
  display: flex;
  list-style: none;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.pc-nav a {
  font-size: 14px;
  color: #4d5a6a;
}

.pc-nav a:hover {
  color: #183153;
}

#humbuger-btn {
  display: none;
}

.humburger-btn {
  display: none;
}

.sp-nav {
  display: none;
}

.page-main {
  padding: 32px 0 0;
}

.main-container {
  width: min(92%, 980px);
  margin: 0 auto;
}

.notice {
  font-size: 12px;
  margin: 0 0 16px;
  color: #7a8594;
}

.post-header {
  margin: 0 0 36px;
}

.mini-label {
  font-size: 13px;
  color: #55708d;
  margin: 0 0 8px;
}

.post-header h1 {
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.3;
  margin: 0 0 16px;
  max-width: 760px;
  color: #183153;
}

.post-header p {
  font-size: 16px;
  line-height: 1.8;
  margin: 0;
  max-width: 760px;
  color: #4d5a6a;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #183153;
  color: #ffffff;
  padding: 14px 28px;
  margin-top: 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  transition: opacity 0.2s ease;
}

.cta-btn:hover {
  opacity: 0.9;
}

.hero-image-wrap {
  margin-bottom: 48px;
}

.hero-image-wrap img {
  height: 420px;
  object-fit: cover;
  border-radius: 20px;
}

.post-contents {
  margin-top: 0;
}

.content-section + .content-section {
  margin-top: 56px;
}

.post-contents h2 {
  font-size: 30px;
  line-height: 1.4;
  margin: 0 0 14px;
  color: #183153;
}

.post-contents p {
  font-size: 16px;
  line-height: 1.8;
  margin: 0 0 16px;
  color: #4d5a6a;
}

.service-lead {
  max-width: 760px;
}

.service-boxes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.service-box {
  border: 1px solid #e3e8ef;
  border-radius: 16px;
  padding: 24px 20px;
  background: #fbfcfe;
}

.service-box h3 {
  margin: 0 0 10px;
  font-size: 20px;
  color: #183153;
}

.service-box p {
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

.flow-list {
  margin: 0;
  padding-left: 1.4em;
  color: #4d5a6a;
}

.flow-list li {
  margin-bottom: 10px;
  font-size: 16px;
}

.post-footer {
  background: #f6f8fb;
  margin-top: 72px;
  padding: 56px 0;
}

.post-footer-inner {
  width: min(92%, 980px);
  margin: 0 auto;
}

.post-footer .cta-btn.sub {
  background: #ffffff;
  color: #183153;
  border: 1px solid #ccd7e4;
}

.page-bottom {
  background: #ffffff;
  border-top: 1px solid #e4e8ee;
  padding: 24px 0;
}

.bottom-container p {
  margin: 0;
  color: #6a7685;
  font-size: 14px;
}

.page-footer {
  background: #1f2630;
  color: #ffffff;
  padding: 18px 0;
}

.footer-container {
  font-size: 12px;
}

.footer-container p {
  margin: 0;
}

@media (max-width: 768px) {
  .pc-nav {
    display: none;
  }

  .humburger-btn {
    display: inline-block;
    width: 40px;
    height: 40px;
    position: relative;
    cursor: pointer;
  }

  .humburger-btn span {
    display: block;
    position: absolute;
    top: 10px;
    left: 8px;
  }

  .humburger-btn i {
    display: block;
    width: 24px;
    height: 2px;
    margin-bottom: 5px;
    background: #183153;
  }

  #humbuger-btn:checked ~ .sp-nav {
    display: block;
    position: absolute;
    top: 62px;
    right: 16px;
    background: #ffffff;
    border: 1px solid #e3e8ef;
    border-radius: 12px;
    padding: 12px 16px;
    box-shadow: 0 10px 30px rgba(24, 49, 83, 0.08);
  }

  .sp-nav-ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .sp-nav-ul li + li {
    margin-top: 10px;
  }

  .page-main {
    padding-top: 24px;
  }

  .post-header {
    margin-bottom: 28px;
  }

  .post-header h1 {
    font-size: 32px;
  }

  .post-header p,
  .post-contents p,
  .flow-list li {
    font-size: 15px;
  }

  .hero-image-wrap {
    margin-bottom: 36px;
  }

  .hero-image-wrap img {
    height: 300px;
    border-radius: 16px;
  }

  .service-boxes {
    grid-template-columns: 1fr;
  }

  .service-box {
    padding: 20px 18px;
  }

  .post-footer {
    margin-top: 56px;
    padding: 44px 0;
  }
}

@media (max-width: 480px) {
  .header-cat {
    min-height: 64px;
  }

  .header-logo {
    font-size: 18px;
  }

  .main-container,
  .post-footer-inner,
  .header-container,
  .bottom-container,
  .footer-container {
    width: 92%;
  }

  .notice {
    margin-bottom: 12px;
  }

  .post-header h1 {
    font-size: 28px;
    line-height: 1.35;
  }

  .post-contents h2 {
    font-size: 24px;
    margin-bottom: 12px;
  }

  .post-contents p {
    font-size: 15px;
    line-height: 1.75;
  }

  .cta-btn {
    width: 100%;
    padding: 14px 18px;
    margin-top: 20px;
  }

  .hero-image-wrap img {
    width: 100%;
    height: 220px;
    margin-left: 0;
  }

  .content-section + .content-section {
    margin-top: 44px;
  }

  .post-footer {
    padding: 36px 0;
  }
}