:root {
  --bg: #071421;
  --bg-soft: #0c2033;
  --card-bg: rgba(255, 255, 255, 0.95);
  --text: #142233;
  --muted: #607080;
  --light: #ecf6ff;
  --accent: #19a7ce;
  --gold: #f3c969;
  --line: rgba(160, 190, 220, 0.32);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: radial-gradient(circle at 18% 8%, rgba(25, 167, 206, 0.24), transparent 28rem), linear-gradient(180deg, var(--bg) 0, var(--bg-soft) var(--top-bg-height, 360px), #f6f8fb var(--top-bg-height, 360px), #f6f8fb 100%);
}
body.page-home { --top-bg-height: 570px; }
body.page-product { --top-bg-height: 475px; --hero-min: clamp(360px, 44vh, 505px); }
body.page-about { --top-bg-height: 420px; --hero-min: clamp(340px, 42vh, 475px); }
body.page-contact { --top-bg-height: 470px; --hero-min: clamp(330px, 40vh, 470px); }
body.page-scenarios { --top-bg-height: 360px; --hero-min: clamp(260px, 34vh, 380px); }
a { color: inherit; }
.site-header {
  position: sticky;
  top: 1rem;
  z-index: 10;
  max-width: 1180px;
  margin: 1rem auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  background: rgba(7, 20, 33, 0.84);
  backdrop-filter: blur(12px);
}
.brand-mark { color: var(--light); font-weight: 800; text-decoration: none; white-space: nowrap; display: inline-flex; align-items: center; gap: .55rem; }
.brand-logo { width: 36px; height: 36px; border-radius: 10px; object-fit: contain; background: rgba(255,255,255,.92); padding: 3px; }
.top-nav, .language-switch { display: flex; align-items: center; gap: 0.3rem; flex-wrap: wrap; }
.top-nav a, .language-switch a {
  border-radius: 999px;
  color: #d8e8f2;
  font-size: 0.9rem;
  line-height: 1;
  padding: 0.56rem 0.78rem;
  text-decoration: none;
}
.top-nav a:hover, .top-nav a[aria-current="page"], .language-switch .active { background: rgba(255, 255, 255, 0.13); color: #fff; }
.language-switch { border: 1px solid rgba(255, 255, 255, 0.16); border-radius: 999px; padding: 0.15rem; }
.page { max-width: 1180px; margin: 0 auto; padding: 0 1.2rem 2rem; }
.hero { min-height: var(--hero-min, clamp(260px, 34vh, 380px)); display: grid; align-items: center; color: var(--light); position: relative; overflow: hidden; padding: 2.4rem 0 2.2rem; margin-bottom: 1rem; }
.hero-home { min-height: clamp(420px, 58vh, 620px); padding: 4rem 0 3rem; margin-bottom: 1.2rem; }
.hero::after { content: ""; position: absolute; right: 0; bottom: 0; width: min(34vw, 360px); height: min(34vw, 360px); border: 1px solid rgba(255,255,255,.16); border-radius: 50%; background: linear-gradient(120deg, transparent 49%, rgba(25,167,206,.28) 50%, transparent 51%), repeating-radial-gradient(circle, rgba(255,255,255,.08) 0 1px, transparent 1px 42px); transform: translate(18%, 26%); }
.hero-home::after { width: min(48vw, 520px); height: min(48vw, 520px); }
.hero-content { position: relative; z-index: 1; max-width: 760px; }
.eyebrow { color: var(--gold); font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
h1 { font-size: clamp(2.6rem, 7vw, 5rem); line-height: 1.05; margin: 0.4rem 0; letter-spacing: -0.04em; }
.hero:not(.hero-home) h1 { font-size: clamp(2.1rem, 5vw, 3.6rem); max-width: 900px; }
h2 { color: #0b5d78; font-size: 1.65rem; margin: 2rem 0 1rem; }
h3 { color: #12324a; margin-bottom: 0.5rem; }
.lead { color: #d8e8f2; font-size: 1.16rem; max-width: 720px; }
.actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 1.6rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 2.8rem; padding: 0 1.2rem; border-radius: 999px; font-weight: 800; text-decoration: none; }
.button-primary { background: var(--gold); color: #10243a; }
.button-secondary { border: 1px solid rgba(255,255,255,.42); color: var(--light); }
.button-release { gap: .45rem; }
.cta-icon { display: inline-flex; align-items: center; justify-content: center; min-width: 1.65rem; height: 1.65rem; padding: 0 .35rem; border-radius: 999px; background: rgba(255,255,255,.16); font-size: .72rem; letter-spacing: .02em; }
.section { margin: 1.5rem 0; }
.card { background: var(--card-bg); border: 1px solid rgba(10,68,100,.12); border-radius: 18px; box-shadow: 0 18px 44px rgba(8,26,44,.08); padding: 1.45rem; margin-bottom: 1rem; }
.card-dark { background: rgba(12,32,51,.9); color: var(--light); border-color: rgba(255,255,255,.14); }
.card-dark h2, .card-dark h3 { color: var(--light); }
.summary-grid, .feature-grid, .image-grid, .value-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.image-grid-home { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.summary-item { background: #fff; border-radius: 16px; padding: 1rem; border: 1px solid rgba(10,68,100,.12); }
.summary-num { color: #0b5d78; font-size: 2rem; font-weight: 900; }
.tag { display: inline-block; margin: .18rem .18rem .18rem 0; padding: .14rem .5rem; border-radius: 6px; background: #dbeafe; color: #1d4ed8; font-size: .78rem; font-weight: 700; }
.scenario-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.scenario-card { display: grid; gap: .65rem; }
.scenario-card h3, .scenario-card p { margin-top: 0; }
.scenario-case { border: 1px solid #dbe5ec; border-radius: 14px; background: #f8fbfd; padding: .95rem; }
.scenario-case-title { color: #12324a; font-weight: 800; margin-bottom: .55rem; }
.scenario-case dl { display: grid; gap: .4rem; margin: 0; }
.scenario-case dt { color: #0b5d78; font-weight: 800; }
.scenario-case dd { margin: 0 0 .45rem; color: var(--muted); }
.image-card { margin: 0; overflow: hidden; border: 1px solid #dbe5ec; border-radius: 16px; background: #f8fbfd; }
.image-card img { width: 100%; height: 260px; object-fit: cover; display: block; }
.image-card figcaption { padding: .75rem .9rem; color: var(--muted); font-size: .9rem; }
table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 14px; overflow: hidden; }
th, td { padding: .72rem .8rem; border-bottom: 1px solid #dbe5ec; text-align: left; vertical-align: top; }
th { background: #eef5f9; color: #183247; }
.muted { color: var(--muted); }
.footer-meta { display: grid; gap: .32rem; margin-top: .9rem; }
.footer-meta a { color: #1d5d84; font-weight: 700; text-decoration: none; }
.footer-links { display: flex; flex-wrap: wrap; gap: .5rem 1rem; }
.qrcode-grid { display: grid; grid-template-columns: repeat(2, minmax(130px, 1fr)); gap: .85rem; min-width: min(100%, 340px); }
.qrcode-grid-left { justify-self: start; }
.qrcode-card { margin: 0; padding: .85rem; border: 1px solid #dbe5ec; border-radius: 16px; background: #f8fbfd; text-align: center; }
.qrcode-card img { width: 112px; height: 112px; object-fit: contain; display: block; margin: 0 auto .55rem; }
.qrcode-card figcaption { display: grid; gap: .2rem; color: var(--muted); font-size: .86rem; }
.qrcode-card strong { color: #12324a; }
.footer-brand { display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.notice { border-left: 4px solid var(--gold); background: #fff8e6; padding: 1rem; border-radius: 0 14px 14px 0; }
@media (max-width: 820px) {
  .site-header { position: static; flex-direction: column; align-items: stretch; }
  .page { padding: 0 1rem 1rem; }
  .hero, .hero-home { min-height: auto; padding: 2rem 0 1.7rem; margin-bottom: .7rem; }
  .image-grid-home { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .image-card img { height: 210px; }
  .footer-brand { align-items: flex-start; flex-direction: column; }
  .qrcode-grid { width: 100%; }
  table { display: block; overflow-x: auto; }
}