:root {
  color-scheme: dark;
  --ink: #070b14;
  --paper: #e6edf4;
  --muted: #8b9aaf;
  --gold: #f2c77b;
  --cyan: #7de0e9;
  --line: rgba(155, 184, 211, 0.16);
  --card: rgba(12, 20, 34, 0.72);
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--paper);
  background:
    radial-gradient(ellipse at 18% 0%, #1a2c48 0, transparent 42%),
    radial-gradient(ellipse at 90% 12%, #243044 0, transparent 28%),
    linear-gradient(#050810, #070b14 40%, #050810);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 12% 18%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 28% 72%, #d5e4f5 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 64% 22%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 82% 64%, #f2c77b 50%, transparent 51%),
    radial-gradient(1px 1px at 46% 40%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 90% 88%, #7de0e9 50%, transparent 51%),
    linear-gradient(rgba(92, 115, 141, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92, 115, 141, 0.05) 1px, transparent 1px);
  background-size: auto, auto, auto, auto, auto, auto, 72px 72px, 72px 72px;
  opacity: 0.7;
}

a { color: inherit; }

img, svg { display: block; }

.wrap {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(16px);
  background: rgba(7, 11, 20, 0.72);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.28em;
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
}

.brand i {
  color: var(--gold);
  font-style: normal;
  letter-spacing: 0;
  font-size: 18px;
}

nav {
  display: flex;
  gap: 22px;
  font-size: 13px;
  color: var(--muted);
}

nav a { text-decoration: none; }
nav a:hover { color: var(--paper); }

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  padding: 72px 0 40px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  color: #9fabb9;
  letter-spacing: 0.28em;
  font-size: 12px;
}

.eyebrow span {
  width: 6px;
  height: 6px;
  background: var(--gold);
  transform: rotate(45deg);
}

h1 {
  margin: 0;
  font-size: clamp(52px, 7vw, 88px);
  line-height: 0.95;
  letter-spacing: 0.12em;
  font-weight: 800;
}

h1 em {
  font-style: normal;
  color: var(--gold);
}

.english {
  margin: 18px 0 0;
  letter-spacing: 0.42em;
  font-size: 12px;
  color: #aab6c7;
}

.lead {
  max-width: 38em;
  margin: 22px 0 0;
  color: #b7c4d4;
  font-size: 18px;
  line-height: 1.7;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary-link,
.ghost-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 10px;
  text-decoration: none;
  letter-spacing: 0.12em;
  font-weight: 700;
}

.primary-link {
  background: var(--gold);
  color: #1e2230;
  box-shadow: 0 8px 30px rgba(219, 163, 90, 0.16);
}

.primary-link:hover { background: #ffdaa0; }

.ghost-link {
  border: 1px solid var(--line);
  color: var(--paper);
  background: rgba(16, 26, 43, 0.55);
}

.ghost-link:hover { background: #26334b; }

.download-note {
  margin: 14px 0 0;
  max-width: 38em;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
  margin-top: 28px;
  color: var(--muted);
  font-size: 13px;
}

.meta-row strong {
  display: block;
  margin-top: 4px;
  color: var(--paper);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.phone {
  justify-self: end;
  width: min(320px, 100%);
  aspect-ratio: 9 / 18.2;
  border-radius: 36px;
  padding: 14px;
  background: linear-gradient(180deg, #1c2838, #0b1018);
  border: 1px solid rgba(242, 199, 123, 0.28);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.screen {
  position: relative;
  height: 100%;
  overflow: hidden;
  border-radius: 26px;
  background:
    radial-gradient(circle at 50% 30%, #17304a, transparent 55%),
    #070b14;
}

.screen header,
.screen footer {
  position: absolute;
  left: 16px;
  right: 16px;
  display: flex;
  justify-content: space-between;
  z-index: 1;
}

.screen header { top: 18px; }
.screen footer { bottom: 18px; align-items: end; }

.screen small {
  display: block;
  color: #8397ad;
  letter-spacing: 0.16em;
  font-size: 9px;
}

.screen strong {
  font-family: Consolas, "Courier New", monospace;
  font-weight: 500;
}

.score-num { font-size: 22px; }
.wave-num { color: var(--gold); font-size: 20px; text-align: right; }

.ship {
  position: absolute;
  left: 50%;
  top: 62%;
  width: 54px;
  height: 72px;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 0 12px rgba(125, 224, 233, 0.35));
}

.bolt {
  position: absolute;
  left: 50%;
  width: 3px;
  height: 16px;
  margin-left: -1px;
  border-radius: 2px;
  background: #ffd479;
  box-shadow: 0 0 8px #ffd479;
}

.bolt.a { top: 28%; }
.bolt.b { top: 18%; opacity: 0.7; }
.bolt.c { top: 8%; opacity: 0.4; }

.foe {
  position: absolute;
  width: 28px;
  height: 28px;
  border: 1px solid #ff9566;
  transform: rotate(45deg);
  opacity: 0.85;
}

.foe.one { top: 18%; left: 22%; }
.foe.two { top: 26%; right: 18%; width: 18px; height: 18px; }

.free-band {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
  padding: 28px;
  border: 1px solid rgba(242, 199, 123, 0.35);
  border-radius: 18px;
  background: linear-gradient(120deg, rgba(242, 199, 123, 0.12), rgba(12, 20, 34, 0.4));
}

.free-band h2,
section h2 {
  margin: 0 0 10px;
  font-size: 32px;
  letter-spacing: 0.08em;
}

.free-band p,
.card p,
.step p,
.spec p {
  margin: 0;
  color: #c5d0dc;
  line-height: 1.7;
}

.price {
  align-self: center;
  text-align: right;
}

.price b {
  display: block;
  color: var(--gold);
  font-size: 56px;
  letter-spacing: 0.08em;
  line-height: 1;
}

.price span {
  color: var(--muted);
  letter-spacing: 0.18em;
  font-size: 12px;
}

section { padding: 72px 0; }

.section-head {
  max-width: 640px;
  margin-bottom: 28px;
}

.section-head p { color: var(--muted); line-height: 1.7; }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card,
.step,
.spec {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
}

.card .mark,
.step .index {
  color: var(--gold);
  letter-spacing: 0.18em;
  font-size: 12px;
}

.card h3,
.step h3,
.spec h3 {
  margin: 10px 0;
  font-size: 18px;
  letter-spacing: 0.06em;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.spec strong { color: var(--cyan); font-weight: 650; }

footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 13px;
}

footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.missing {
  min-height: 100vh;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 40px 20px;
}

.missing h1 { letter-spacing: 0.08em; font-size: 42px; }
.missing .eyebrow { justify-content: center; }

@media (max-width: 860px) {
  nav { display: none; }
  .hero,
  .free-band,
  .grid,
  .steps,
  .two { grid-template-columns: 1fr; }
  .phone { justify-self: center; }
  .price { text-align: left; }
  h1 { letter-spacing: 0.06em; }
}

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