:root {
  --navy: #0b2d52;
  --navy-2: #123d67;
  --text: #25364a;
  --muted: #657285;
  --line: #e9d9d7;
  --pink: #e87982;
  --pink-soft: #fff2f3;
  --peach: #fff7f0;
  --blue-soft: #f0f7ff;
  --green: #18b85f;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(13, 45, 82, 0.12);
  --radius-lg: 32px;
  --radius-md: 22px;
  --container: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  font-family: "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.75;
  background: linear-gradient(180deg, #ffffff 0%, #fffafa 50%, #fff7f3 100%);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(calc(100% - 40px), var(--container)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(233, 217, 215, 0.75);
  backdrop-filter: blur(18px);
}
.header-inner {
  width: min(calc(100% - 36px), 1200px);
  min-height: 74px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 18px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  color: var(--navy);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--navy);
  border-radius: 14px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}
.area-label {
  padding: 6px 13px;
  border-radius: 999px;
  background: var(--pink-soft);
  color: #c55d68;
  font-size: 0.82rem;
  font-weight: 800;
  white-space: nowrap;
}
.global-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--navy);
  font-size: 0.94rem;
  font-weight: 800;
}
.global-nav a { position: relative; }
.global-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 2px;
  background: var(--pink);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}
.global-nav a:hover::after { transform: scaleX(1); }
.header-cta {
  padding: 12px 18px;
  border-radius: 999px;
  color: var(--white);
  background: var(--green);
  box-shadow: 0 10px 28px rgba(24, 184, 95, 0.28);
  font-weight: 900;
  white-space: nowrap;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 640px;
  display: grid;
  align-items: center;
  padding: 86px 0 78px;
  background: linear-gradient(90deg, #ffffff 0%, #fbfbfb 46%, #f3f4f5 100%);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: url("./hero-student.jpg");
  background-repeat: no-repeat;
  background-position: right top;
  background-size: auto 100%;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(255,255,255,0.98) 0%, rgba(255,255,255,0.92) 34%, rgba(255,255,255,0.56) 55%, rgba(255,255,255,0.08) 78%, rgba(255,255,255,0) 100%),
    radial-gradient(circle at 18% 20%, rgba(225, 242, 255, 0.65), transparent 34%),
    radial-gradient(circle at 42% 86%, rgba(255, 223, 226, 0.52), transparent 28%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; }
.hero-copy {
  width: min(620px, 100%);
  padding: 42px 42px 40px;
  border: 1px solid rgba(255,255,255,0.72);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.44);
  box-shadow: 0 24px 70px rgba(11, 45, 82, 0.08);
  backdrop-filter: blur(6px);
}
.eyebrow,
.section-kicker {
  margin: 0 0 8px;
  color: #c55d68;
  font-weight: 900;
  letter-spacing: 0.14em;
  font-size: 0.86rem;
}
.hero h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(2.75rem, 5.2vw, 5.25rem);
  line-height: 1.12;
  letter-spacing: 0.055em;
  font-weight: 900;
}
.hero h1::after {
  content: "";
  display: block;
  width: min(380px, 75%);
  height: 15px;
  margin-top: -8px;
  margin-left: 4px;
  border-radius: 999px;
  background: rgba(232, 121, 130, 0.35);
}
.hero-lead {
  margin: 24px 0 0;
  color: var(--navy-2);
  font-size: clamp(1rem, 1.5vw, 1.17rem);
  font-weight: 700;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0 0; }
.hero-tags span {
  padding: 8px 13px;
  border: 1px solid rgba(232, 121, 130, 0.3);
  border-radius: 999px;
  color: #bd5a65;
  background: rgba(255, 255, 255, 0.78);
  font-size: 0.88rem;
  font-weight: 800;
}
.hero-actions,
.final-cta-inner { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-actions { margin-top: 30px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 58px;
  padding: 0 28px;
  border-radius: 999px;
  font-weight: 900;
  letter-spacing: 0.04em;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn::after { content: "›"; font-size: 1.45rem; line-height: 1; }
.btn-primary { color: var(--white); background: var(--navy); box-shadow: 0 16px 32px rgba(11, 45, 82, 0.25); }
.btn-secondary { color: var(--navy); background: rgba(255, 255, 255, 0.72); border: 1px solid rgba(11, 45, 82, 0.22); }
.btn-line { color: var(--white); background: var(--green); box-shadow: 0 14px 28px rgba(24, 184, 95, 0.22); }

.section { padding: 76px 0; }
.section-heading { text-align: center; margin-bottom: 34px; }
.section-heading h2,
.safety h2,
.final-cta h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.35;
  letter-spacing: 0.08em;
  font-weight: 900;
}
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feature-card,
.price-card,
.flow-list li,
.faq details {
  border: 1px solid rgba(216, 190, 188, 0.72);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 10px 30px rgba(11, 45, 82, 0.06);
}
.feature-card { padding: 30px 22px; text-align: center; }
.icon,
.step-icon {
  display: inline-grid;
  place-items: center;
  width: 70px;
  height: 70px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--pink-soft);
  font-size: 1.85rem;
}
.feature-card h3,
.flow-list h3 {
  margin: 0 0 10px;
  color: var(--navy);
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  font-weight: 900;
}
.feature-card p,
.flow-list p,
.faq p { margin: 0; color: var(--text); font-size: 0.95rem; }

.section-lead {
  width: min(760px, 100%);
  margin: 12px auto 0;
  color: var(--muted);
  font-weight: 700;
  line-height: 1.9;
}
.space-gallery {
  padding-top: 58px;
  background:
    radial-gradient(circle at 12% 18%, rgba(240, 247, 255, 0.9), transparent 30%),
    linear-gradient(180deg, #ffffff 0%, #fff9f9 100%);
}
.gallery-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  grid-auto-rows: 245px;
  gap: 18px;
}
.gallery-card {
  position: relative;
  min-height: 220px;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: #fff;
  box-shadow: 0 18px 45px rgba(11, 45, 82, 0.11);
}
.gallery-card-large {
  grid-row: span 2;
}
.gallery-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.gallery-card:hover img { transform: scale(1.035); }
.gallery-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 52%;
  background: linear-gradient(180deg, rgba(11,45,82,0) 0%, rgba(11,45,82,0.72) 100%);
  pointer-events: none;
}
.gallery-card figcaption {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 18px;
  z-index: 1;
  color: #fff;
}
.gallery-card figcaption span {
  display: inline-block;
  margin-bottom: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}
.gallery-card figcaption strong {
  display: block;
  font-size: 1rem;
  line-height: 1.5;
  letter-spacing: 0.04em;
}
.gallery-card-large figcaption strong { font-size: 1.24rem; }

.price { background: rgba(255, 242, 243, 0.48); }
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.price-card { position: relative; overflow: hidden; padding: 30px 22px; text-align: center; }
.price-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 6px;
  background: linear-gradient(90deg, var(--pink), #f5b7a8);
  opacity: 0.78;
}
.featured-price {
  transform: translateY(-8px);
  border-color: rgba(232, 121, 130, 0.55);
  background: #fff;
  box-shadow: 0 18px 42px rgba(232, 121, 130, 0.12);
}
.price-name { margin: 0 0 10px; color: var(--navy); font-weight: 900; letter-spacing: 0.08em; }
.price-amount { margin: 0; color: #c95764; font-weight: 900; letter-spacing: 0.05em; }
.price-amount span { font-size: clamp(2.3rem, 4.5vw, 3.7rem); line-height: 1; }
.tax { margin: 6px 0 0; color: var(--muted); font-size: 0.92rem; font-weight: 700; }
.price-note { margin: 24px auto 0; width: min(820px, 100%); color: var(--muted); text-align: center; font-size: 0.95rem; }
.flow-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.flow-list li { position: relative; padding: 30px 20px 26px; text-align: center; }
.step-num {
  position: absolute;
  top: -16px;
  left: 18px;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: var(--white);
  background: var(--navy);
  font-weight: 900;
}
.safety { padding-top: 50px; }
.safety-card {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 34px;
  align-items: center;
  padding: 44px;
  border: 1px solid rgba(232, 121, 130, 0.24);
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 96% 8%, rgba(255, 223, 226, 0.75), transparent 24%), #ffffff;
  box-shadow: var(--shadow);
}
.safety-copy p:last-child { margin: 18px 0 0; }
.safety-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 0; padding: 0; list-style: none; }
.safety-list li {
  position: relative;
  padding: 17px 18px 17px 48px;
  border-radius: 18px;
  background: var(--pink-soft);
  color: var(--navy);
  font-weight: 800;
}
.safety-list li::before {
  content: "✓";
  position: absolute;
  top: 17px;
  left: 18px;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  color: #fff;
  background: var(--pink);
  font-size: 0.78rem;
}
.faq { padding-top: 50px; }
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.faq details { padding: 0; overflow: hidden; }
.faq summary { cursor: pointer; padding: 20px 22px; color: var(--navy); font-weight: 900; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--pink); font-size: 1.35rem; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq p { padding: 0 22px 22px; }
.final-cta { padding: 70px 0; }
.final-cta-inner {
  justify-content: space-between;
  padding: 42px 48px;
  border: 1px solid rgba(232, 121, 130, 0.3);
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 4% 90%, rgba(240, 247, 255, 0.85), transparent 24%), linear-gradient(135deg, #fff7f8 0%, #ffffff 100%);
  box-shadow: var(--shadow);
}
.final-cta p:last-child { margin: 12px 0 0; color: var(--navy-2); font-weight: 700; }
.site-footer { padding: 24px 0; color: var(--navy); background: #fff8f5; }
.footer-inner { display: flex; justify-content: space-between; gap: 18px; align-items: center; }
.footer-brand { margin: 0; font-weight: 900; letter-spacing: 0.08em; color: var(--navy); }
.footer-brand:hover { text-decoration: underline; text-underline-offset: 4px; }
.site-footer nav { display: flex; gap: 24px; color: var(--muted); font-size: 0.9rem; font-weight: 700; }

@media (max-width: 980px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 220px; }
  .gallery-card-large { grid-row: span 1; }
  .global-nav { display: none; }
  .hero {
    min-height: auto;
    padding: 330px 0 52px;
    background: #fff;
  }
  .hero::before {
    bottom: auto;
    height: 300px;
    background-size: auto 100%;
    background-position: right top;
  }
  .hero::after {
    bottom: auto;
    height: 300px;
    background: linear-gradient(180deg, rgba(255,255,255,0) 58%, rgba(255,255,255,1) 100%);
  }
  .hero-copy {
    padding: 34px 28px 32px;
    background: rgba(255,255,255,0.92);
  }
  .safety-card { grid-template-columns: 1fr; }
  .feature-grid,
  .flow-list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .header-inner { min-height: 66px; width: min(calc(100% - 24px), 1200px); }
  .brand-mark,
  .area-label { display: none; }
  .brand-text { font-size: 0.95rem; }
  .header-cta { margin-left: auto; padding: 10px 14px; font-size: 0.86rem; }
  .hero { padding-top: 300px; }
  .hero::before,
  .hero::after { height: 270px; }
  .hero h1 { font-size: clamp(2.25rem, 11vw, 3.25rem); }
  .hero-copy { padding: 28px 20px; }
  .section { padding: 56px 0; }
  .feature-grid,
  .price-grid,
  .flow-list,
  .faq-grid,
  .safety-list,
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-auto-rows: auto; }
  .gallery-card { min-height: 230px; }
  .featured-price { transform: none; }
  .safety-card,
  .final-cta-inner { padding: 30px 22px; }
  .btn { width: 100%; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}