:root {
  color-scheme: dark;
  --bg: #030711;
  --bg-deep: #02050b;
  --bg-soft: #081329;
  --card: rgba(10, 24, 49, .78);
  --card-strong: rgba(12, 32, 66, .92);
  --line: rgba(112, 174, 255, .20);
  --line-strong: rgba(125, 216, 255, .40);
  --text: #f4f8ff;
  --muted: #a8b8d3;
  --accent: #2f9eff;
  --accent-2: #80dcff;
  --accent-3: #7d7cff;
  --success: #80f0c4;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 83% 9%, rgba(35, 111, 255, .24), transparent 30%),
    radial-gradient(circle at 13% 28%, rgba(90, 82, 255, .12), transparent 27%),
    linear-gradient(160deg, var(--bg-deep) 0%, var(--bg) 43%, #06142c 100%);
  line-height: 1.72;
  min-height: 100vh;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(20px);
  background: rgba(2, 7, 17, .78);
  border-bottom: 1px solid var(--line);
}
.nav {
  max-width: var(--max);
  margin: auto;
  padding: 13px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; color: white; letter-spacing: -.02em; }
.brand img { width: 42px; height: 42px; border-radius: 11px; box-shadow: 0 0 30px rgba(45, 141, 255, .38); }
nav { display: flex; flex-wrap: wrap; gap: 19px; font-size: .91rem; }
nav a { color: #dce8ff; }
main { max-width: var(--max); margin: auto; padding: 72px 24px 88px; }
.hero {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 70px;
  align-items: center;
  min-height: 72vh;
  padding-bottom: 52px;
}
.hero-art { position: relative; min-height: 520px; display: grid; place-items: center; }
.hero-glow { position: absolute; width: 82%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(61, 153, 255, .32), transparent 68%); filter: blur(8px); }
.hero-icon { width: min(76%, 410px); border-radius: 27%; box-shadow: 0 34px 120px rgba(26, 99, 255, .34); position: relative; z-index: 2; }
.metric-chip { position: absolute; z-index: 3; min-width: 190px; padding: 13px 16px; border-radius: 15px; border: 1px solid var(--line-strong); background: rgba(5, 16, 38, .86); backdrop-filter: blur(16px); box-shadow: 0 18px 50px rgba(0,0,0,.28); }
.metric-chip strong, .metric-chip span { display: block; }
.metric-chip strong { font-size: .95rem; }
.metric-chip span { color: var(--muted); font-size: .78rem; }
.chip-a { left: 0; top: 24%; }
.chip-b { right: 0; bottom: 20%; }
.eyebrow { color: var(--accent-2); font-weight: 800; letter-spacing: .11em; text-transform: uppercase; font-size: .78rem; }
h1 { font-size: clamp(3rem, 8vw, 6.4rem); line-height: .98; margin: 13px 0 24px; letter-spacing: -.06em; }
h2 { font-size: clamp(1.8rem, 4.2vw, 3rem); line-height: 1.12; letter-spacing: -.035em; margin: 8px 0 18px; }
h3 { margin: 8px 0 8px; line-height: 1.3; }
.lead, .section-lead { color: #dbe8fb; font-size: clamp(1.06rem, 2.3vw, 1.32rem); max-width: 760px; }
.section-lead { max-width: 900px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 29px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 19px; border-radius: 13px; font-weight: 800; border: 1px solid var(--line); }
.button.primary { color: #00152d; background: linear-gradient(135deg, var(--accent-2), var(--accent)); box-shadow: 0 10px 32px rgba(47, 158, 255, .26); }
.button.secondary { color: var(--text); background: rgba(255,255,255,.045); }
.status-row { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
.status-pill { padding: 5px 10px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255,255,255,.045); font-size: .78rem; font-weight: 800; }
.status-note { color: var(--muted); font-size: .82rem; }
.section { padding: 70px 0; border-top: 1px solid var(--line); }
.section-heading { max-width: 820px; margin-bottom: 30px; }
.intro { padding-top: 62px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card, .mode-card, .pricing-card, .jp-grid article {
  position: relative;
  overflow: hidden;
  padding: 25px;
  background: linear-gradient(160deg, var(--card-strong), var(--card));
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 17px 54px rgba(0,0,0,.20);
}
.feature-card::after, .mode-card::after, .pricing-card::after {
  content: "";
  position: absolute;
  inset: auto -20% -55% 34%;
  height: 150px;
  background: radial-gradient(circle, rgba(48, 154, 255, .15), transparent 68%);
}
.feature-card.featured { border-color: var(--line-strong); background: linear-gradient(155deg, rgba(20, 55, 108, .95), rgba(9, 26, 54, .88)); }
.feature-number { font-size: .72rem; color: var(--accent-2); font-weight: 900; letter-spacing: .12em; }
.feature-card p, .mode-card p, .pricing-card p, .jp-grid p, .muted { color: var(--muted); }
.mode-grid, .pricing-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.mode-label, .plan-name { display: inline-flex; padding: 5px 10px; border-radius: 999px; color: var(--accent-2); border: 1px solid var(--line-strong); background: rgba(72, 162, 255, .08); font-size: .76rem; font-weight: 900; text-transform: uppercase; letter-spacing: .08em; }
.pro-mode, .pro-card { border-color: rgba(125, 124, 255, .45); }
.check-list { list-style: none; padding: 0; margin: 20px 0 0; }
.check-list li { position: relative; padding: 8px 0 8px 28px; color: #dbe8fb; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 900; }
.notice { padding: 18px 20px; border-left: 4px solid var(--accent); background: rgba(46, 137, 255, .10); border-radius: 11px; }
.notice.compact { margin-top: 22px; font-size: .92rem; }
.language-cloud { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.language-cloud span { padding: 7px 12px; border-radius: 999px; background: rgba(255,255,255,.045); border: 1px solid var(--line); color: #dce8fa; font-size: .84rem; }
.lang-ja { border-top-style: dashed; }
.jp-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; margin: 26px 0; }
.final-cta { display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.final-cta .actions { margin-top: 0; }
footer { border-top: 1px solid var(--line); color: var(--muted); background: rgba(2, 6, 15, .56); }
.footer-inner { max-width: var(--max); margin: auto; padding: 28px 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
code { background: rgba(255,255,255,.08); padding: 2px 6px; border-radius: 5px; }
ol, ul { padding-left: 1.25rem; }
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; gap: 24px; }
  .hero-art { min-height: 430px; order: -1; }
  .hero-icon { width: min(58%, 350px); }
  .feature-grid, .jp-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .nav { align-items: flex-start; flex-direction: column; }
  nav { gap: 13px 16px; }
  main { padding-top: 42px; }
  .hero-art { min-height: 330px; }
  .hero-icon { width: 66%; }
  .metric-chip { min-width: 150px; padding: 10px 12px; }
  .chip-a { left: 2%; top: 16%; }
  .chip-b { right: 2%; bottom: 12%; }
  .feature-grid, .mode-grid, .pricing-grid, .jp-grid { grid-template-columns: 1fr; }
  .section { padding: 54px 0; }
  .final-cta { align-items: flex-start; flex-direction: column; }
}