:root {
  color-scheme: dark;
  --bg: #07101f;
  --bg-soft: #0c1830;
  --panel: rgba(15, 31, 57, 0.78);
  --panel-strong: #102344;
  --line: rgba(129, 178, 255, 0.2);
  --text: #edf5ff;
  --muted: #a8bad0;
  --blue: #48a8ff;
  --cyan: #55e2df;
  --lime: #b6df65;
  --max: 1180px;
  --radius: 22px;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 82% 0%, rgba(39, 150, 255, 0.18), transparent 34rem),
    radial-gradient(circle at 10% 18%, rgba(36, 224, 209, 0.08), transparent 26rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button { font: inherit; }
.shell { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 100; background: #fff; color: #07101f; padding: 10px 14px; border-radius: 8px; }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 16, 31, 0.88);
  backdrop-filter: blur(16px);
}
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; min-width: max-content; }
.brand img { width: 48px; height: 34px; object-fit: cover; border-radius: 8px; }
.brand strong { display: block; font-size: 15px; line-height: 1.2; }
.brand small { display: block; margin-top: 3px; color: var(--muted); font-size: 9px; letter-spacing: 0.18em; }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 26px; }
.site-nav a { position: relative; color: #c8d6e7; font-size: 15px; }
.site-nav a:hover, .site-nav a.active { color: #fff; }
.site-nav a.active::after { content: ""; position: absolute; left: 10%; right: 10%; bottom: -12px; height: 2px; background: linear-gradient(90deg, var(--blue), var(--cyan)); }
.header-cta, .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 20px; border-radius: 12px; font-weight: 700; background: linear-gradient(135deg, #2676ff, #28c7dd); color: #fff; box-shadow: 0 12px 30px rgba(38, 118, 255, 0.22); }
.button.secondary { background: transparent; border: 1px solid rgba(126, 181, 255, 0.44); box-shadow: none; color: #dbeaff; }
.menu-button { display: none; margin-left: auto; color: #fff; border: 1px solid var(--line); background: transparent; padding: 8px 12px; border-radius: 9px; }

.hero { position: relative; overflow: hidden; padding: 106px 0 88px; }
.hero::after { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0.16; background-image: linear-gradient(rgba(117,177,255,.18) 1px, transparent 1px), linear-gradient(90deg, rgba(117,177,255,.18) 1px, transparent 1px); background-size: 58px 58px; mask-image: linear-gradient(to bottom, #000, transparent 86%); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.14fr .86fr; align-items: center; gap: 64px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--cyan); text-transform: uppercase; letter-spacing: .16em; font-size: 12px; font-weight: 800; }
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--cyan); }
h1, h2, h3 { margin-top: 0; line-height: 1.16; }
h1 { margin-bottom: 24px; max-width: 780px; font-size: clamp(42px, 6.5vw, 76px); letter-spacing: -0.04em; }
h1 .accent { color: transparent; background: linear-gradient(100deg, #6db7ff, #52e7dd 58%, #c1e96b); background-clip: text; }
.lead { max-width: 720px; color: #bfd0e4; font-size: 18px; }
.actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.actions.center { justify-content: center; }
.assurance-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; color: #bed0e4; font-size: 13px; }
.assurance-row span { padding: 7px 11px; border: 1px solid var(--line); background: rgba(15,31,57,.55); border-radius: 999px; }
.hero-visual { position: relative; min-height: 410px; display: grid; place-items: center; }
.hero-visual::before, .hero-visual::after { content: ""; position: absolute; border: 1px solid rgba(81, 211, 229, .25); border-radius: 50%; }
.hero-visual::before { width: 390px; height: 390px; }
.hero-visual::after { width: 285px; height: 285px; border-style: dashed; }
.signal-card { position: relative; z-index: 2; width: min(100%, 330px); padding: 28px; border: 1px solid rgba(101,187,255,.34); border-radius: var(--radius); background: linear-gradient(145deg, rgba(17,45,78,.94), rgba(9,23,44,.9)); box-shadow: var(--shadow); }
.signal-card img { width: 82px; height: 55px; object-fit: cover; border-radius: 12px; }
.signal-card h2 { margin: 18px 0 8px; font-size: 26px; }
.signal-card p { color: var(--muted); margin-bottom: 0; }
.signal-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 22px; }
.signal-list span { padding: 12px; border-radius: 12px; background: rgba(56,108,165,.18); color: #dbeaff; font-size: 13px; }

.section { padding: 88px 0; }
.section.alt { background: rgba(8, 21, 41, .72); border-block: 1px solid rgba(112,167,235,.1); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 32px; margin-bottom: 36px; }
.section-head h2 { margin-bottom: 0; max-width: 760px; font-size: clamp(30px, 4.5vw, 48px); }
.section-head p { max-width: 520px; margin: 0; color: var(--muted); }
.grid-4, .grid-3, .grid-2 { display: grid; gap: 20px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card { position: relative; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: 0 16px 42px rgba(0,0,0,.12); }
.card .number { display: inline-grid; place-items: center; width: 38px; height: 38px; margin-bottom: 30px; border: 1px solid rgba(91, 209, 226, .36); border-radius: 11px; color: var(--cyan); font-weight: 800; }
.card h3 { margin-bottom: 10px; font-size: 21px; }
.card p { margin: 0; color: var(--muted); }
.card ul { margin: 16px 0 0; padding-left: 20px; color: var(--muted); }
.process { counter-reset: process; }
.process .card { padding-top: 70px; }
.process .card::before { counter-increment: process; content: "0" counter(process); position: absolute; top: 22px; left: 28px; color: var(--cyan); font-size: 12px; font-weight: 800; letter-spacing: .18em; }
.boundary { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; padding: 34px; border: 1px solid rgba(182,223,101,.25); border-radius: var(--radius); background: linear-gradient(110deg, rgba(33,72,91,.58), rgba(18,47,43,.45)); }
.boundary h2 { margin-bottom: 8px; font-size: 28px; }
.boundary p { margin: 0; color: #c5d8df; }

.page-hero { padding: 78px 0 52px; border-bottom: 1px solid var(--line); }
.page-hero h1 { font-size: clamp(38px, 5vw, 60px); margin: 10px 0 16px; }
.page-hero p { max-width: 760px; color: var(--muted); font-size: 18px; }
.prose { max-width: 850px; margin: 0 auto; }
.prose h2 { margin-top: 42px; font-size: 28px; }
.prose h3 { margin-top: 28px; font-size: 21px; }
.prose p, .prose li { color: #c2d0df; }
.prose a { color: #75c7ff; text-decoration: underline; }
.notice { margin: 28px 0; padding: 20px 22px; border-left: 3px solid var(--cyan); background: rgba(45,114,142,.16); color: #d8e9f1; }
.detail-list { display: grid; gap: 12px; margin: 24px 0; padding: 0; list-style: none; }
.detail-list li { padding: 16px 18px; border: 1px solid var(--line); border-radius: 14px; background: rgba(17,34,62,.55); }
.news-card { display: flex; flex-direction: column; min-height: 260px; }
.news-meta { color: var(--cyan); font-size: 12px; letter-spacing: .12em; }
.news-card h2 { margin: 18px 0 12px; font-size: 24px; }
.news-card p { color: var(--muted); }
.news-card .more { margin-top: auto; color: #79c6ff; font-weight: 700; }
.contact-card a { color: #83cdfd; }
.contact-card strong { display: block; margin-bottom: 8px; color: #fff; }
.empty-state { min-height: 52vh; display: grid; place-items: center; text-align: center; }
.empty-state strong { display: block; font-size: clamp(64px, 12vw, 130px); color: transparent; background: linear-gradient(135deg, var(--blue), var(--cyan)); background-clip: text; }

.site-footer { padding: 64px 0 24px; border-top: 1px solid var(--line); background: #050c17; }
.footer-grid { display: grid; grid-template-columns: 1.7fr repeat(3, 1fr); gap: 42px; }
.footer-grid h2 { margin-bottom: 16px; font-size: 15px; }
.footer-grid p, .footer-grid a { display: block; margin: 7px 0; color: #9fb0c4; font-size: 14px; }
.footer-grid a:hover { color: #fff; }
.footer-brand { margin-bottom: 18px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 40px; padding-top: 22px; border-top: 1px solid rgba(120,161,214,.14); color: #73869c; font-size: 13px; }

@media (max-width: 960px) {
  .header-cta { display: none; }
  .menu-button { display: inline-flex; }
  .site-nav { display: none; position: absolute; top: 76px; left: 20px; right: 20px; padding: 18px; flex-direction: column; align-items: stretch; gap: 0; border: 1px solid var(--line); border-radius: 16px; background: #0a1730; box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 11px 8px; }
  .site-nav a.active::after { display: none; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 340px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .shell { width: min(calc(100% - 28px), var(--max)); }
  .brand strong { font-size: 13px; }
  .brand small { display: none; }
  .hero { padding: 72px 0 58px; }
  h1 { font-size: 43px; }
  .lead { font-size: 16px; }
  .hero-visual { min-height: 300px; }
  .hero-visual::before { width: 290px; height: 290px; }
  .hero-visual::after { width: 220px; height: 220px; }
  .signal-card { padding: 22px; }
  .section { padding: 64px 0; }
  .section-head { display: block; }
  .section-head p { margin-top: 16px; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .boundary { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-grid > div:last-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}