:root {
  --ink: #f4f8ff;
  --muted: #b2c2d7;
  --night: #07111f;
  --night-raised: #0e1b2e;
  --line: #2c4260;
  --gold: #e9b84a;
  --gold-soft: #f6d885;
  --teal: #19c7a3;
  --teal-dark: #0c766a;
  --red: #f06b7d;
  font-family: Inter, "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--night); color: var(--ink); }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid var(--gold-soft); outline-offset: 3px; }

.landing-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 72px;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 12px max(20px, calc((100vw - 1280px) / 2));
  border-bottom: 1px solid rgba(128, 161, 197, .35);
  background: #07111f;
}

.landing-brand { display: flex; align-items: center; gap: 10px; min-width: 258px; }
.landing-brand img { width: 38px; height: 38px; }
.landing-brand strong, .landing-brand small { display: block; }
.landing-brand strong { font-size: 15px; letter-spacing: 0; }
.landing-brand small { margin-top: 3px; color: var(--muted); font-size: 11px; }
.landing-nav nav { display: flex; align-items: center; gap: 24px; }
.landing-nav nav a { color: var(--muted); font-size: 13px; font-weight: 700; }
.landing-nav nav a:hover { color: var(--gold-soft); }
.landing-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }

.landing-login, .landing-register, .hero-primary, .hero-secondary {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}
.landing-login, .hero-secondary { color: var(--ink); background: rgba(7, 17, 31, .7); }
.landing-register, .hero-primary { border-color: var(--gold); color: #1d1606; background: var(--gold); }
.landing-register:hover, .hero-primary:hover { background: var(--gold-soft); }
.landing-login:hover, .hero-secondary:hover { border-color: var(--teal); color: var(--teal); }

.landing-hero {
  position: relative;
  min-height: min(720px, calc(100dvh - 96px));
  display: grid;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: #091827 url("/assets/landing-rising-candles.png") center top / cover no-repeat;
}
.landing-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background: rgba(4, 12, 24, .62);
}
.hero-content {
  position: relative;
  width: min(1280px, 100%);
  margin: 0 auto;
  padding: 88px max(20px, calc((100vw - 1280px) / 2));
}
.landing-eyebrow { margin: 0 0 12px; color: var(--gold-soft); font-size: 12px; font-weight: 900; letter-spacing: 0; }
.hero-content h1 { max-width: 690px; margin: 0; color: #fff9df; font-size: clamp(42px, 7vw, 76px); line-height: 1.05; letter-spacing: 0; }
.hero-subtitle { margin: 12px 0 0; color: var(--teal); font-size: clamp(19px, 2vw, 26px); font-weight: 800; }
.hero-copy { max-width: 520px; margin: 22px 0 0; color: #d5dfed; font-size: 17px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.hero-primary { min-height: 46px; gap: 16px; padding: 0 18px; }
.hero-primary span { font-size: 20px; line-height: 1; }
.hero-secondary { min-height: 46px; padding: 0 18px; }

.hero-signals {
  display: flex;
  width: min(620px, 100%);
  margin: 48px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid rgba(218, 232, 247, .35);
}
.hero-signals div { flex: 1; min-width: 0; padding: 0 16px; border-left: 1px solid rgba(218, 232, 247, .25); }
.hero-signals div:first-child { padding-left: 0; border-left: 0; }
.hero-signals dt { color: var(--muted); font-size: 11px; }
.hero-signals dd { margin: 7px 0 0; color: #fff; font-size: 14px; font-weight: 800; }

.landing-section { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 100px 0; }
.section-intro { max-width: 640px; }
.section-intro h2, .admission-section h2 { margin: 0; color: #fff9df; font-size: clamp(28px, 4vw, 44px); line-height: 1.22; letter-spacing: 0; }
.capability-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 44px; }
.capability-grid article {
  min-height: 236px;
  padding: 26px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: 8px;
  background: var(--night-raised);
}
.capability-grid article:nth-child(2) { border-top-color: var(--gold); }
.capability-grid article:nth-child(3) { border-top-color: var(--red); }
.capability-index { color: var(--muted); font-family: ui-monospace, Consolas, monospace; font-size: 12px; font-weight: 800; }
.capability-grid h3 { margin: 52px 0 10px; color: #fff; font-size: 19px; }
.capability-grid p, .admission-section p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }

.admission-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 42px;
  border-top: 1px solid var(--line);
}
.admission-section > div:first-child { max-width: 720px; }
.admission-section p { margin-top: 18px; }
.admission-actions { display: flex; flex-wrap: wrap; gap: 10px; }

.landing-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 24px;
  padding: 28px max(20px, calc((100vw - 1280px) / 2));
  border-top: 1px solid var(--line);
  background: #050d18;
}
.landing-footer strong, .landing-footer span { display: block; }
.landing-footer strong { font-size: 14px; }
.landing-footer span, .landing-footer small { margin-top: 4px; color: var(--muted); font-size: 11px; }
.footer-contact { display: flex; gap: 16px; }
.footer-contact a { color: var(--gold-soft); font-size: 13px; font-weight: 800; }
.footer-contact a:hover { color: var(--teal); }

@media (max-width: 860px) {
  .landing-nav { gap: 14px; }
  .landing-brand { min-width: 0; }
  .landing-nav nav { display: none; }
  .landing-hero { min-height: min(660px, calc(100dvh - 76px)); background-position: 62% top; }
  .hero-content { padding-top: 58px; padding-bottom: 48px; }
  .hero-copy { font-size: 15px; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability-grid article { min-height: 0; }
  .capability-grid h3 { margin-top: 34px; }
  .admission-section { grid-template-columns: 1fr; align-items: start; }
  .landing-footer { grid-template-columns: 1fr; gap: 14px; }
}

@media (max-width: 520px) {
  .landing-nav { min-height: 64px; padding: 10px 14px; }
  .landing-brand img { width: 34px; height: 34px; }
  .landing-brand strong { font-size: 13px; }
  .landing-brand small { display: none; }
  .landing-actions { gap: 5px; }
  .landing-login, .landing-register { min-height: 34px; padding: 0 9px; font-size: 11px; }
  .landing-hero { min-height: calc(100dvh - 112px); background-position: 64% top; }
  .hero-content { padding: 46px 20px; }
  .hero-content h1 { font-size: 43px; }
  .hero-subtitle { font-size: 19px; }
  .hero-signals { margin-top: 34px; }
  .hero-signals div { padding: 0 9px; }
  .hero-signals dd { font-size: 12px; }
  .landing-section { width: min(100% - 28px, 1180px); padding: 72px 0; }
  .capability-grid { margin-top: 30px; }
  .capability-grid article { padding: 22px; }
  .admission-actions { width: 100%; }
  .admission-actions a { flex: 1; }
  .footer-contact { flex-direction: column; gap: 9px; }
}