:root {
  --paper: #fbf4e6;
  --paper-2: #efe3cf;
  --ink: #122b39;
  --muted: #5f716f;
  --line: rgba(18,43,57,.14);
  --red: #df4634;
  --blue: #164c6b;
  --gold: #c99a4d;
  --green: #6e8d78;
  --shadow: 0 30px 80px rgba(18,43,57,.16);
  --serif: "Noto Serif JP", "EB Garamond", serif;
  --sans: "Noto Sans JP", "Noto Sans SC", sans-serif;
  --mono: "JetBrains Mono", monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 80% 5%, rgba(223,70,52,.15), transparent 28rem),
    radial-gradient(circle at 8% 18%, rgba(22,76,107,.14), transparent 24rem),
    linear-gradient(135deg, #fffaf0 0%, var(--paper) 42%, #edf2ea 100%);
  font-family: var(--sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
.field-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(18,43,57,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(18,43,57,.045) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(circle at 50% 25%, #000 0, transparent 78%);
}
a { color: inherit; }
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 18px clamp(18px, 4vw, 56px);
  background: rgba(251,244,230,.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; gap: 12px; align-items: center; text-decoration: none; }
.mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  border-radius: 12px; background: var(--ink); color: var(--paper);
  font: 700 13px var(--mono); box-shadow: inset 0 0 0 1px rgba(255,255,255,.16);
}
.brand b { display: block; font: 600 16px var(--mono); letter-spacing: .08em; }
.brand small { display: block; color: var(--muted); font: 500 10px var(--mono); letter-spacing: .18em; text-transform: uppercase; }
nav { display: flex; justify-content: center; gap: 22px; font: 600 12px var(--mono); letter-spacing: .12em; text-transform: uppercase; }
nav a, .langs a, footer a { text-decoration: none; color: var(--muted); }
nav a:hover, .langs a:hover, footer a:hover { color: var(--red); }
.langs { display: flex; gap: 8px; }
.langs a { border: 1px solid var(--line); border-radius: 999px; padding: 5px 10px; font: 600 11px var(--mono); }
.langs .active { color: var(--paper); background: var(--ink); border-color: var(--ink); }
.hero {
  width: min(1180px, calc(100% - 36px));
  margin: 46px auto 0;
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(360px, 1.08fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  min-height: calc(100vh - 118px);
}
.eyebrow {
  margin: 0 0 16px;
  font: 700 11px var(--mono);
  letter-spacing: .28em;
  color: var(--red);
  text-transform: uppercase;
}
h1, h2 {
  font-family: var(--serif);
  line-height: 1.08;
  letter-spacing: -.035em;
  margin: 0;
}
h1 { font-size: clamp(44px, 7vw, 88px); max-width: 10ch; }
h2 { font-size: clamp(30px, 4.2vw, 58px); }
.lead, .section-head p, .partners p, .final p {
  color: var(--muted);
  font-size: clamp(16px, 1.6vw, 20px);
  max-width: 680px;
}
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 22px;
  border-radius: 14px;
  text-decoration: none;
  font: 700 13px var(--mono);
  letter-spacing: .08em;
  transition: transform .24s ease, box-shadow .24s ease, background .24s ease;
}
.btn:hover { transform: translateY(-2px); }
.primary { background: var(--red); color: #fffaf0; box-shadow: 0 16px 38px rgba(223,70,52,.24); }
.ghost { border: 1px solid var(--line); background: rgba(255,250,240,.52); }
.status { margin-top: 24px; color: var(--muted); font: 600 12px var(--mono); letter-spacing: .08em; }
.status span { display: inline-block; width: 9px; height: 9px; margin-right: 9px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 6px rgba(110,141,120,.16); }
.hero-visual { position: relative; }
.hero-visual img { width: 100%; display: block; border-radius: 42px; box-shadow: var(--shadow); border: 1px solid rgba(18,43,57,.1); }
.ai-card {
  position: absolute;
  left: -28px;
  bottom: -28px;
  width: min(420px, 92%);
  padding: 18px;
  color: #f8efe1;
  background: rgba(15,38,49,.94);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 24px;
  box-shadow: 0 24px 70px rgba(18,43,57,.28);
}
.ai-card p { margin: 10px 0 0; color: rgba(248,239,225,.82); font-size: 14px; }
.prompt { color: #fff8ea !important; font-family: var(--mono); }
.ai-head { display: flex; align-items: center; gap: 7px; font: 700 11px var(--mono); letter-spacing: .14em; }
.ai-head span { width: 8px; height: 8px; border-radius: 50%; background: var(--red); }
.ai-head span:nth-child(2) { background: var(--gold); }
.ai-head span:nth-child(3) { background: var(--green); margin-right: 8px; }
.section {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(76px, 10vw, 132px) 0 0;
}
.section-head { display: grid; grid-template-columns: .86fr 1fr; gap: 28px; align-items: end; margin-bottom: 28px; }
.moment-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.moment, .trust-grid article, .series-grid a, .faq details {
  background: rgba(255,250,240,.64);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 24px;
  box-shadow: 0 18px 50px rgba(18,43,57,.06);
}
.moment span { color: var(--red); font: 700 12px var(--mono); }
h3 { margin: 12px 0 8px; font-size: 20px; line-height: 1.35; }
.moment p, .trust-grid p, .series-grid p, .faq p { margin: 0; color: var(--muted); font-size: 15px; }
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.partners {
  display: grid;
  grid-template-columns: 1fr .86fr;
  gap: 38px;
  align-items: center;
  background: rgba(18,43,57,.94);
  color: #fff8ea;
  padding: clamp(36px, 6vw, 70px);
  border-radius: 42px;
  box-shadow: var(--shadow);
}
.partners p { color: rgba(255,248,234,.75); }
.partners ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.partners li {
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 16px;
  padding: 14px 16px;
  background: rgba(255,255,255,.05);
}
.series-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.series-grid a { text-decoration: none; min-height: 168px; transition: transform .24s ease, border-color .24s ease; }
.series-grid a:hover { transform: translateY(-4px); border-color: rgba(223,70,52,.42); }
.series-grid span { color: var(--red); font: 700 13px var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.labs { padding-top: 56px; }
.labs-panel {
  display: grid;
  grid-template-columns: 1.05fr .7fr;
  gap: 22px;
  align-items: stretch;
  padding: 24px;
  border: 1px dashed rgba(18,43,57,.22);
  border-radius: 32px;
  background: rgba(255,250,240,.42);
}
.labs-panel h2 { font-size: clamp(26px, 3vw, 42px); }
.labs-panel p { color: var(--muted); margin-bottom: 0; }
.labs-links { display: grid; align-content: stretch; }
.labs-links a {
  display: grid;
  align-content: center;
  text-decoration: none;
  border-radius: 24px;
  padding: 22px;
  color: #fff8ea;
  background:
    radial-gradient(circle at 100% 0%, rgba(223,70,52,.22), transparent 12rem),
    var(--ink);
  box-shadow: 0 22px 52px rgba(18,43,57,.14);
}
.labs-links span { color: var(--gold); font: 700 13px var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.labs-links p { color: rgba(255,248,234,.76); margin-top: 10px; }
.faq { max-width: 900px; }
.faq details { margin-bottom: 12px; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq p { margin-top: 10px; }
.final {
  width: min(1040px, calc(100% - 36px));
  margin: clamp(76px, 10vw, 132px) auto;
  padding: clamp(38px, 7vw, 84px);
  text-align: center;
  border-radius: 48px;
  background:
    radial-gradient(circle at 20% 0%, rgba(223,70,52,.18), transparent 28rem),
    rgba(255,250,240,.72);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.final p { margin-left: auto; margin-right: auto; }
.final .actions { justify-content: center; }
footer {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: center;
  padding: 34px 18px 46px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 600 12px var(--mono);
}
@media (max-width: 900px) {
  .nav { grid-template-columns: 1fr; position: relative; }
  nav { justify-content: flex-start; overflow-x: auto; padding-bottom: 4px; }
  .langs { flex-wrap: wrap; }
  .hero, .section-head, .partners { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-copy { order: 1; }
  .hero-visual { order: 2; }
  h1 { max-width: 12ch; }
  .moment-grid, .trust-grid, .series-grid { grid-template-columns: 1fr; }
  .labs-panel { grid-template-columns: 1fr; }
  .ai-card { position: relative; left: auto; bottom: auto; margin: -20px auto 0; }
}
@media (max-width: 560px) {
  .nav { padding: 14px 16px; }
  .hero, .section, .final { width: min(100% - 24px, 1120px); }
  h1 { font-size: 39px; }
  .hero-visual img { border-radius: 28px; }
  .moment, .trust-grid article, .series-grid a, .faq details { border-radius: 22px; padding: 20px; }
}
@media (prefers-reduced-motion: no-preference) {
  .moment { animation: rise .55s ease both; animation-delay: calc(var(--i) * 70ms); }
  @keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
}