:root {
  --blue: #1e2878; --navy: #131a4e; --red: #dc0a32; --text: #505050;
  --pale: #f5f8ff; --border: #cbcff2; --content: 1200px; --space: 80px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); font: 18px/1.5 "Noto Sans JP", sans-serif; }
h1, h2, h3, p, dl, dd { margin: 0; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-underline-offset: .2em; }
a:focus-visible { outline: 3px solid var(--red); outline-offset: 5px; }
section[id] { scroll-margin-top: 24px; }
.container { width: 92%; max-width: var(--content); margin-inline: auto; }
.site-header { padding-block: 16px; }
.header-inner { display: flex; align-items: center; gap: 16px; }
.header-copy { flex: none; font-size: 14px; line-height: 1.25; }
.brand { display: block; width: 304px; max-width: 100%; }
.brand img { width: 100%; }
.hero { padding-block: 64px 80px; background: var(--blue); color: #fff; }
.tagline { padding-bottom: 8px; border-bottom: 1px solid #ffffff40; color: #cbcff2; font-size: 22px; line-height: 1.4; }
.hero-content { display: flex; align-items: flex-start; justify-content: space-between; gap: 40px; padding-top: 32px; }
h1 { font-size: clamp(40px, 4.8vw, 72px); line-height: 1.15; }
.button { display: inline-flex; flex: none; align-items: center; justify-content: center; width: 256px; max-width: 100%; min-height: 96px; padding: 20px 24px; border-radius: 8px; background: var(--red); color: #fff; font-size: 30px; font-weight: 700; line-height: 1.2; text-align: center; text-decoration: none; }
.button:hover { background: #b8082a; }
.hero .button:focus-visible, .site-footer .button:focus-visible { outline-color: #fff; }
.notice { max-width: 650px; margin-block: 40px; padding: 24px 36px 18px; border: 3px solid var(--blue); border-radius: 7px; background: #e7ecf8; font-size: 14px; line-height: 1.4; }
.notice h2 { margin-bottom: 12px; font-size: 22px; }
.notice p + p { margin-top: 14px; }
.notice-sign { text-align: right; }
.section-heading { padding-block: 16px; background: var(--navy); color: #fff; }
.section-heading h2 { font-size: 48px; line-height: 1.3; }
.section-content { padding-block: var(--space); }
.seminar-layout { display: grid; grid-template-columns: 1.2fr .93fr; align-items: start; gap: 40px; }
.seminar-image-link { display: block; min-width: 0; border-radius: 4px; transition: transform .2s ease, box-shadow .2s ease; }
.seminar-image-link:hover, .seminar-image-link:focus-visible { transform: translateY(-4px); box-shadow: 0 12px 24px #131a4e30; }
.seminar-art { width: 100%; }
.seminar-info { min-width: 0; }
.seminar-button { width: 100%; min-height: 96px; flex-direction: column; font-size: 28px; }
.seminar-button small { font-size: 18px; }
.seminar-info dl { margin-top: 8px; }
.seminar-info dl div { display: grid; grid-template-columns: 100px minmax(0, 1fr); gap: 16px; padding-block: 11px; border-bottom: 1px solid var(--border); }
.seminar-info dt { font-weight: 700; }
.red { color: var(--red); }
.small-note { padding-block: 10px; border-bottom: 1px solid var(--border); font-size: 13px; line-height: 1.35; }
.about-layout { display: grid; grid-template-columns: 2fr 1fr; align-items: start; gap: 48px; }
.about-copy p + p { margin-top: 24px; }
.section-nav { padding: 16px 24px; border-radius: 4px; background: var(--pale); color: var(--navy); }
.section-nav a { display: flex; align-items: center; gap: 12px; min-height: 44px; font-size: 22px; font-weight: 700; line-height: 1.3; text-decoration: none; }
.section-nav a::before { content: "›"; color: var(--red); font-size: 32px; font-weight: 400; }
.section-nav a:hover { text-decoration: underline; }
.service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.service-card { padding: 20px 16px; border: 2px solid var(--border); border-radius: 4px; }
.service-heading { display: flex; align-items: center; gap: 24px; margin-bottom: 24px; }
.service-heading img { width: 96px; height: 96px; flex: none; }
.service-heading h3 { color: var(--navy); font-size: 24px; line-height: 1.3; }
.service-card p { font-size: 16px; }
.advantage-list { display: grid; gap: 80px; }
.advantage { display: grid; grid-template-columns: 2fr 1fr; align-items: start; gap: 48px; }
.advantage h3 { margin-bottom: 24px; color: var(--red); font-size: 24px; line-height: 1.4; }
.advantage img { width: 100%; }
.company-details { font-size: 24px; }
.company-details > div { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 32px; padding-block: 20px; border-bottom: 1px solid var(--border); }
.company-details dt { font-weight: 700; }
.company-details dd { overflow-wrap: anywhere; }
.company-details a { text-decoration: none; }
.company-details a:hover { text-decoration: underline; }
.locations { padding-bottom: 160px; }
.locations article + article { margin-top: 80px; }
.locations h3 { margin-bottom: 24px; color: var(--navy); font-size: 36px; line-height: 1.3; }
.locations address { margin-bottom: 24px; font-style: normal; }
.locations iframe { display: block; width: 100%; height: 450px; border: 0; background: var(--pale); }
.site-footer { padding-block: 24px; background: var(--blue); color: #fff; }
.footer-content { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding-bottom: 24px; }
.footer-content p { margin-top: 8px; color: #cbcff2; font-size: 22px; }
.copyright { padding-top: 8px; border-top: 1px solid #ffffff40; color: #cbcff2; font-size: 14px; }
@media (max-width: 1199px) {
  :root { --space: 64px; }
  body { font-size: 17px; }
  .hero { padding-block: 48px 64px; }
  .hero-content { gap: 24px; }
  .button { width: 208px; min-height: 72px; font-size: 25px; }
  .section-heading h2 { font-size: 40px; }
  .seminar-layout, .about-layout, .advantage { gap: 32px; }
  .seminar-button { min-height: 72px; font-size: 23px; }
  .seminar-button small { font-size: 15px; }
  .section-nav { padding-inline: 16px; }
  .section-nav a { font-size: 18px; }
  .service-grid { gap: 16px; }
  .service-card { padding: 16px 12px; }
  .service-heading { gap: 12px; }
  .service-heading img { width: 56px; height: 56px; }
  .service-heading h3 { font-size: 18px; }
  .advantage h3 { font-size: 22px; }
  .company-details { font-size: 20px; }
  .company-details > div { grid-template-columns: 180px minmax(0, 1fr); gap: 24px; }
  .locations { padding-bottom: 80px; }
  .footer-content p { font-size: 18px; }
}
@media (max-width: 767px) {
  :root { --space: 40px; }
  body { font-size: 16px; }
  .header-inner { gap: 8px; }
  .header-copy { font-size: 9px; }
  .brand { width: 220px; }
  .hero { padding-block: 40px; }
  .tagline { font-size: 16px; overflow-wrap: anywhere; }
  .hero-content { flex-direction: column; gap: 32px; padding-top: 24px; }
  h1 { font-size: clamp(29px, 8vw, 42px); line-height: 1.2; }
  .button { width: auto; min-height: 56px; padding: 16px 26px; font-size: 21px; }
  .notice { margin-block: 32px; padding: 20px; }
  .section-heading h2 { font-size: clamp(28px, 6.5vw, 36px); }
  .seminar-layout, .about-layout, .service-grid, .advantage { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .seminar-button { min-height: 72px; font-size: 22px; }
  .seminar-button small { font-size: 14px; }
  .seminar-info dl div { grid-template-columns: 78px minmax(0, 1fr); gap: 8px; }
  .seminar-info dd { overflow-wrap: anywhere; }
  .section-nav { padding: 16px 24px; }
  .section-nav a { font-size: 20px; }
  .service-card { padding: 24px; }
  .service-heading { gap: 20px; margin-bottom: 20px; }
  .service-heading img { width: 80px; height: 80px; }
  .service-heading h3 { font-size: 21px; }
  .advantage-list { gap: 48px; }
  .advantage h3 { margin-bottom: 16px; font-size: 22px; }
  .company-details { font-size: 18px; }
  .company-details > div { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .locations { padding-bottom: 80px; }
  .locations article + article { margin-top: 48px; }
  .locations h3 { margin-bottom: 16px; font-size: 28px; }
  .locations address { margin-bottom: 20px; overflow-wrap: anywhere; }
  .locations iframe { height: 320px; }
  .footer-content { flex-direction: column; align-items: flex-start; gap: 24px; }
  .footer-content p { font-size: 16px; }
}
@media (max-width: 359px) {
  .service-card { padding: 20px; }
  .service-heading { gap: 16px; }
  .service-heading img { width: 64px; height: 64px; }
  .service-heading h3 { font-size: 19px; }
}
@media (prefers-reduced-motion: reduce) {
  .seminar-image-link { transition: none; }
  .seminar-image-link:hover, .seminar-image-link:focus-visible { transform: none; }
}