:root {
  --bg: #09090b;
  --surface: #131316;
  --surface-2: #1b1b20;
  --text: #f6f6f7;
  --muted: #aaaab3;
  --line: #2b2b31;
  --accent: #ef3340;
  --accent-hover: #ff4b57;
  --max: 1120px;
  --radius: 18px;
  --shadow: 0 18px 45px rgba(0, 0, 0, .32);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 15% 0%, rgba(239,51,64,.12), transparent 34rem),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.75;
}
body.age-lock { overflow: hidden; }
a { color: inherit; }
img { max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  z-index: 2000;
  top: 8px;
  left: 8px;
  transform: translateY(-160%);
  background: #fff;
  color: #000;
  padding: 8px 12px;
  border-radius: 8px;
}
.skip-link:focus { transform: translateY(0); }

.container { width: min(calc(100% - 36px), var(--max)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(255,255,255,.07);
  background: rgba(9,9,11,.9);
  backdrop-filter: blur(14px);
}
.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { text-decoration: none; display: inline-flex; align-items: baseline; gap: 9px; white-space: nowrap; }
.brand-main { font-size: 1.35rem; font-weight: 900; letter-spacing: .025em; }
.brand-main em { color: var(--accent); font-style: normal; }
.brand-sub { color: var(--muted); font-size: .72rem; }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  text-decoration: none;
  color: #d4d4d9;
  font-size: .91rem;
  font-weight: 700;
  padding: 9px 11px;
  border-radius: 9px;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { background: var(--surface-2); color: #fff; }
.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: #fff;
  border-radius: 9px;
  padding: 8px 11px;
  font: inherit;
  font-weight: 700;
}

.hero { padding: clamp(76px, 10vw, 130px) 0 84px; }
.hero-grid { display: grid; grid-template-columns: minmax(0,1.15fr) minmax(300px,.85fr); gap: clamp(36px, 8vw, 90px); align-items: center; }
.eyebrow {
  display: inline-flex;
  border: 1px solid rgba(239,51,64,.35);
  background: rgba(239,51,64,.09);
  color: #ff9aa1;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .05em;
}
h1, h2, h3 { line-height: 1.35; margin-top: 0; }
h1 { font-size: clamp(2.4rem, 7vw, 5.35rem); letter-spacing: -.045em; margin: 18px 0 20px; }
h1 .accent { color: var(--accent); }
.hero-lead { color: #d2d2d7; font-size: clamp(1.02rem, 2vw, 1.18rem); max-width: 42rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 50px;
  padding: 12px 22px;
  border-radius: 11px;
  text-decoration: none;
  font-weight: 850;
  border: 1px solid transparent;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 12px 28px rgba(239,51,64,.22); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--surface); border-color: var(--line); color: #fff; }
.btn-secondary:hover { background: var(--surface-2); border-color: #44444d; }
.btn-small { min-height: 42px; padding: 9px 16px; }
.mini-note { color: var(--muted); font-size: .82rem; margin-top: 13px; }

.hero-panel {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 25px;
  background: linear-gradient(145deg, rgba(255,255,255,.055), rgba(255,255,255,.018));
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero-panel::before {
  content: "18+";
  position: absolute;
  right: -14px;
  top: -45px;
  font-weight: 950;
  font-size: 8rem;
  color: rgba(239,51,64,.075);
  letter-spacing: -.08em;
}
.panel-kicker { color: var(--muted); font-size: .83rem; font-weight: 800; }
.panel-title { font-size: 1.48rem; margin: 8px 0 19px; }
.check-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.check-list li { display: grid; grid-template-columns: 27px 1fr; gap: 11px; align-items: start; color: #d6d6db; }
.check-list li::before {
  content: "✓";
  display: grid;
  place-items: center;
  width: 25px;
  height: 25px;
  border-radius: 999px;
  background: rgba(239,51,64,.13);
  color: #ff707a;
  font-weight: 900;
}

.section { padding: 82px 0; }
.section-muted { border-block: 1px solid rgba(255,255,255,.055); background: rgba(255,255,255,.022); }
.section-head { max-width: 750px; margin-bottom: 34px; }
.section-head h2 { font-size: clamp(1.75rem, 4vw, 2.65rem); margin-bottom: 12px; }
.section-head p { color: var(--muted); margin: 0; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: var(--surface);
}
.card-number { color: var(--accent); font-size: .78rem; font-weight: 900; letter-spacing: .12em; }
.card h3 { font-size: 1.2rem; margin: 11px 0 9px; }
.card p { color: var(--muted); margin: 0; }
.card-link { display: inline-block; margin-top: 18px; color: #fff; font-weight: 800; text-underline-offset: 4px; }

.cta-box {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 34px;
  padding: clamp(30px, 6vw, 55px);
  border: 1px solid rgba(239,51,64,.3);
  border-radius: 24px;
  background: linear-gradient(120deg, rgba(239,51,64,.15), rgba(255,255,255,.025));
}
.cta-box h2 { font-size: clamp(1.7rem, 4vw, 2.5rem); margin-bottom: 12px; }
.cta-box p { color: #cacacf; margin: 0; max-width: 700px; }
.cta-actions { display: flex; flex-direction: column; gap: 10px; min-width: 245px; }

.steps { counter-reset: step; display: grid; gap: 14px; }
.step {
  counter-increment: step;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}
.step::before {
  content: counter(step);
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font-weight: 900;
}
.step h3 { margin: 2px 0 4px; font-size: 1.05rem; }
.step p { margin: 0; color: var(--muted); }

.faq { display: grid; gap: 12px; }
details { border: 1px solid var(--line); border-radius: 13px; background: var(--surface); padding: 0 20px; }
summary { cursor: pointer; font-weight: 800; padding: 19px 0; }
details p { color: var(--muted); margin: -3px 0 20px; }

.page-hero { padding: 65px 0 42px; border-bottom: 1px solid rgba(255,255,255,.06); }
.page-hero h1 { font-size: clamp(2rem, 5vw, 3.3rem); margin: 0 0 12px; letter-spacing: -.035em; }
.page-hero p { color: var(--muted); margin: 0; max-width: 760px; }
.prose { max-width: 820px; padding: 58px 0 92px; }
.prose h2 { margin-top: 2.5em; font-size: 1.55rem; border-left: 4px solid var(--accent); padding-left: 14px; }
.prose h3 { margin-top: 2em; font-size: 1.15rem; }
.prose p, .prose li { color: #c7c7cc; }
.prose a { color: #ff8b93; text-underline-offset: 4px; }
.prose .notice { border: 1px solid var(--line); background: var(--surface); padding: 20px; border-radius: 13px; }
.contact-address { font-size: clamp(1.15rem, 4vw, 1.7rem); font-weight: 900; letter-spacing: .02em; color: #fff; word-break: break-all; }

.site-footer { border-top: 1px solid var(--line); background: #070708; padding: 43px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 35px; }
.footer-copy { color: var(--muted); font-size: .87rem; max-width: 500px; }
.footer-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 9px 17px; }
.footer-nav a { color: #c9c9ce; font-size: .85rem; text-underline-offset: 4px; }
.copyright { border-top: 1px solid rgba(255,255,255,.055); margin-top: 28px; padding-top: 20px; color: #76767f; font-size: .78rem; }

.age-gate {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(0,0,0,.88);
  backdrop-filter: blur(14px);
}
.age-gate[hidden] { display: none; }
.age-dialog {
  width: min(100%, 510px);
  padding: clamp(27px, 7vw, 43px);
  border: 1px solid #36363d;
  border-radius: 23px;
  background: #111114;
  box-shadow: 0 30px 80px rgba(0,0,0,.7);
  text-align: center;
}
.age-mark { color: var(--accent); font-size: 3rem; font-weight: 950; line-height: 1; }
.age-dialog h2 { font-size: 1.75rem; margin: 15px 0 12px; }
.age-dialog p { color: var(--muted); }
.age-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; margin-top: 23px; }
.age-actions button, .age-actions a { border: 0; cursor: pointer; font: inherit; }

@media (max-width: 880px) {
  .hero-grid, .grid-3, .cta-box, .footer-grid { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .cta-actions { min-width: 0; }
  .footer-nav { justify-content: flex-start; }
  .nav-toggle { display: inline-block; }
  .site-nav {
    position: absolute;
    top: 72px;
    left: 18px;
    right: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: #111114;
    box-shadow: var(--shadow);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 12px; }
  .brand-sub { display: none; }
}

@media (max-width: 520px) {
  .container { width: min(calc(100% - 26px), var(--max)); }
  .hero { padding-top: 58px; }
  h1 { font-size: 2.65rem; }
  .hero-actions .btn, .cta-actions .btn { width: 100%; }
  .age-actions { grid-template-columns: 1fr; }
  .card { padding: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}