:root {
  --ink: #10231f;
  --muted: #5c6762;
  --line: #d9ddd6;
  --paper: #ffffff;
  --soft: #f4f1ea;
  --deep: #0f3b31;
  --accent: #c44727;
  --gold: #b4863d;
  --max: 1180px;
  --shadow: 0 22px 48px rgba(16, 35, 31, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Yu Gothic", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  letter-spacing: 0;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 74px;
  padding: 12px clamp(18px, 4vw, 48px);
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid rgba(16, 35, 31, 0.12);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 235px;
  text-decoration: none;
}

.brand img {
  width: clamp(112px, 12vw, 154px);
  height: auto;
  object-fit: contain;
}

.brand span {
  color: var(--deep);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.45;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  font-size: 14px;
  font-weight: 700;
}

.site-nav a {
  text-decoration: none;
  white-space: nowrap;
}

.nav-cta,
.button,
.contact-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 14px 24px;
  border: 1px solid var(--deep);
  border-radius: 3px;
  font-weight: 800;
  text-decoration: none;
}

.nav-cta,
.button.primary,
.contact-form button {
  color: #fff;
  background: var(--deep);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.78);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 40px;
  border: 1px solid var(--line);
  background: #fff;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(380px, 0.9fr) minmax(440px, 1.1fr);
  min-height: min(760px, calc(100vh - 74px));
  background: linear-gradient(90deg, #fff 0%, #fff 45%, #eef3ef 45%, #eef3ef 100%);
}

.hero-copy {
  align-self: center;
  max-width: 700px;
  padding: clamp(48px, 8vw, 96px) clamp(24px, 5vw, 70px);
}

.hero h1 {
  margin: 0;
  color: var(--deep);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  font-size: clamp(46px, 6.2vw, 82px);
  font-weight: 700;
  line-height: 1.12;
}

.hero p {
  margin: 30px 0 0;
  max-width: 610px;
  color: #263b35;
  font-size: clamp(16px, 1.5vw, 20px);
  line-height: 2;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 38px;
}

.hero-image {
  min-height: 520px;
  padding: clamp(16px, 3vw, 36px) clamp(16px, 3vw, 36px) clamp(16px, 3vw, 36px) 0;
}

.hero-image img {
  border-radius: 4px;
  box-shadow: var(--shadow);
}

.section-band {
  background: var(--soft);
}

.section-head {
  max-width: 820px;
  margin: 0 auto 34px;
  text-align: center;
}

.section-head h2,
.model h2,
.company h2,
.contact h2 {
  margin: 0;
  color: var(--deep);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  font-size: clamp(32px, 4.2vw, 54px);
  line-height: 1.25;
}

.section-head p,
.model p,
.audience p,
.flow span,
.company dd,
.contact p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}

.strength,
.programs,
.audience,
.flow,
.company,
.contact {
  padding: clamp(64px, 8vw, 104px) clamp(20px, 5vw, 56px);
}

.proof-grid,
.program-grid,
.audience-grid {
  display: grid;
  max-width: var(--max);
  margin: 0 auto;
  gap: 18px;
}

.proof-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.proof-grid article,
.audience-grid article {
  padding: 28px;
  background: #fff;
  border: 1px solid rgba(16, 35, 31, 0.12);
  border-radius: 4px;
}

.proof-grid strong {
  display: block;
  margin-bottom: 16px;
  color: var(--accent);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 34px;
  line-height: 1;
}

.proof-grid h3,
.program-card h3,
.audience h3 {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.45;
}

.proof-grid p,
.program-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.program-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.program-card {
  min-height: 360px;
  background: #fff;
  border: 1px solid rgba(16, 35, 31, 0.12);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 12px 28px rgba(16, 35, 31, 0.06);
}

.program-card img {
  height: 180px;
}

.program-card h3,
.program-card p,
.program-card a {
  margin-left: 20px;
  margin-right: 20px;
}

.program-card h3 {
  margin-top: 20px;
}

.program-card p {
  margin-bottom: 24px;
}

.program-card.consultation {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px 0;
  color: #fff;
  background: var(--deep);
}

.program-card.consultation h3,
.program-card.consultation p,
.program-card.consultation a {
  color: #fff;
}

.program-card.consultation a {
  font-weight: 800;
}

.model {
  display: grid;
  grid-template-columns: minmax(360px, 0.92fr) minmax(360px, 1fr);
  gap: clamp(30px, 5vw, 70px);
  align-items: center;
  padding: clamp(64px, 8vw, 108px) clamp(20px, 5vw, 56px);
}

.model-image {
  min-height: 520px;
}

.model-image img {
  border-radius: 4px;
  box-shadow: var(--shadow);
}

.model-copy {
  max-width: 620px;
}

.model h3 {
  margin: 18px 0 0;
  color: var(--accent);
  font-size: clamp(26px, 3.2vw, 40px);
}

.model ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 14px;
  padding: 0;
  margin: 28px 0 34px;
  list-style: none;
}

.model li {
  padding: 12px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 3px;
  font-weight: 700;
}

.audience-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.flow-list {
  display: grid;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0;
  gap: 14px;
  list-style: none;
}

.flow-list li {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  align-items: start;
  padding: 24px;
  background: #fff;
  border: 1px solid rgba(16, 35, 31, 0.12);
  border-radius: 4px;
}

.flow-list strong {
  color: var(--deep);
  font-size: 20px;
}

.company {
  max-width: var(--max);
  margin: 0 auto;
}

.company dl {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 0;
  margin: 30px 0 0;
  border-top: 1px solid var(--line);
}

.company dt,
.company dd {
  margin: 0;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.company dt {
  color: var(--deep);
  font-weight: 800;
}

.contact {
  display: grid;
  grid-template-columns: minmax(300px, 0.82fr) minmax(360px, 1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  background: var(--deep);
}

.contact h2,
.contact p {
  color: #fff;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: clamp(22px, 4vw, 36px);
  background: #fff;
  border-radius: 4px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: var(--deep);
  font-weight: 800;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 13px 14px;
  font: inherit;
}

.contact-form button {
  cursor: pointer;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(20px, 5vw, 56px);
  color: #fff;
  background: #081d18;
}

.site-footer p {
  margin: 0;
  font-size: 13px;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 74px;
    right: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: min(320px, calc(100vw - 36px));
    padding: 18px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

  .site-nav.open {
    display: flex;
  }

  .hero,
  .model,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    background: #fff;
  }

  .hero-image {
    min-height: 360px;
    padding: 0 20px 34px;
  }

  .proof-grid,
  .program-grid,
  .audience-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  body {
    overflow-x: hidden;
  }

  .brand {
    min-width: 0;
  }

  .brand span {
    display: none;
  }

  .hero-copy {
    min-width: 0;
    max-width: 100vw;
    padding: 44px 24px 34px;
  }

  .hero {
    display: block;
    width: 100%;
    min-height: auto;
    overflow: hidden;
  }

  .hero h1 {
    max-width: calc(100vw - 48px);
    font-size: 37px;
    line-height: 1.22;
    overflow-wrap: normal;
  }

  .hero p,
  .section-head p,
  .model p,
  .contact p {
    font-size: 15px;
    line-height: 1.85;
    max-width: calc(100vw - 48px);
    overflow-wrap: anywhere;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    width: calc(100vw - 48px);
  }

  .button {
    width: 100%;
    min-width: 0;
  }

  .proof-grid,
  .program-grid,
  .audience-grid,
  .model ul {
    grid-template-columns: 1fr;
  }

  .flow-list li,
  .company dl {
    grid-template-columns: 1fr;
  }

  .company dd {
    padding-top: 0;
  }
}