:root {
  --bg: #070b14;
  --bg-2: #0d1524;
  --card: rgba(16, 28, 48, 0.72);
  --line: rgba(126, 232, 255, 0.18);
  --text: #e8f4ff;
  --muted: #93a8c4;
  --cyan: #7ee8ff;
  --blue: #2ea7ff;
  --gold: #f0b429;
  --radius: 22px;
  --shadow: 0 30px 80px rgba(0, 20, 60, 0.45);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}
.glow {
  pointer-events: none;
  position: fixed;
  width: 48vw;
  height: 48vw;
  border-radius: 50%;
  filter: blur(80px);
  z-index: 0;
}
.glow-a { top: -18vw; right: -10vw; background: rgba(46, 167, 255, 0.18); }
.glow-b { bottom: -20vw; left: -12vw; background: rgba(240, 180, 41, 0.08); }

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 6vw;
  background: rgba(7, 11, 20, 0.72);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav .brand { position: relative; z-index: 22; }
.nav.is-solid { background: rgba(7, 11, 20, 0.92); }
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand img {
  width: 46px;
  height: 46px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 0 24px rgba(46, 167, 255, 0.45);
}
.brand strong { display: block; font-size: 18px; letter-spacing: 0.08em; }
.brand small {
  font-family: Orbitron, sans-serif;
  color: var(--cyan);
  font-size: 10px;
  letter-spacing: 0.18em;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--muted); font-size: 15px; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 8px 16px;
  border: 1px solid var(--cyan);
  border-radius: 999px;
  color: var(--cyan) !important;
}
.menu-btn {
  display: none;
  appearance: none;
  -webkit-appearance: none;
  flex-shrink: 0;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--cyan);
  background: rgba(14, 36, 64, 0.92);
  border: 1px solid var(--cyan);
  border-radius: 12px;
  cursor: pointer;
  place-items: center;
  gap: 5px;
  z-index: 22;
}
.menu-btn span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--cyan);
}

.hero {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: 48px 6vw 80px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  font-family: Orbitron, sans-serif;
  font-size: 12px;
  letter-spacing: 0.22em;
  margin-bottom: 18px;
}
.pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #3dff8b;
  box-shadow: 0 0 12px #3dff8b;
  animation: pulse 1.6s infinite;
}
@keyframes pulse {
  50% { opacity: 0.35; transform: scale(0.7); }
}
h1 {
  font-size: clamp(40px, 6vw, 76px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: 0.02em;
}
h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--cyan), var(--blue), var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead {
  max-width: 540px;
  margin: 22px 0 28px;
  color: var(--muted);
  font-size: 17px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 140px;
  height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(90deg, #1c8dff, #19d0ff);
  color: #041018;
  box-shadow: 0 10px 30px rgba(30, 170, 255, 0.35);
}
.btn-ghost {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}
.stats {
  display: flex;
  gap: 28px;
  list-style: none;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.stats b {
  display: block;
  font-family: Orbitron, sans-serif;
  font-size: 22px;
  color: var(--cyan);
}
.stats span { color: var(--muted); font-size: 13px; }

.hero-stage {
  position: relative;
  min-height: 520px;
}
.hero-car {
  width: min(100%, 640px);
  height: auto;
  margin: 0 auto;
  filter: drop-shadow(0 30px 60px rgba(30, 150, 255, 0.35));
  animation: float 5s ease-in-out infinite;
}
@keyframes float {
  50% { transform: translateY(-12px); }
}
.hud-chip {
  position: absolute;
  font-family: Orbitron, sans-serif;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(7, 16, 28, 0.7);
}
.hud-tl { top: 24px; left: 0; }
.hud-br { right: 8%; bottom: 18%; }
.phone {
  background: #090d14;
  border: 3px solid #1c2a3e;
  border-radius: 34px;
  padding: 8px;
  box-shadow: var(--shadow), inset 0 0 0 1px rgba(126, 232, 255, 0.12);
  overflow: hidden;
}
.phone img { border-radius: 26px; }
.phone-float {
  position: absolute;
  width: 168px;
  right: 0;
  bottom: 0;
  transform: rotate(8deg);
}

.section {
  position: relative;
  z-index: 1;
  padding: 88px 6vw;
  scroll-margin-top: 86px;
}
.section-head { max-width: 640px; margin-bottom: 40px; }
.kicker {
  font-family: Orbitron, sans-serif;
  color: var(--gold);
  letter-spacing: 0.22em;
  font-size: 12px;
  margin-bottom: 10px;
}
h2 { font-size: clamp(28px, 4vw, 44px); line-height: 1.2; }
.section-head p:last-child { color: var(--muted); margin-top: 10px; }

.feature-grid, .zone-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card, .zone {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.card .icon {
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(46, 167, 255, 0.08);
}
.card .icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.card h3, .zone h3 { margin-bottom: 8px; font-size: 20px; }
.card p, .zone p { color: var(--muted); font-size: 14px; }
.zone { position: relative; overflow: hidden; }
.zone img {
  width: 100%;
  height: 168px;
  object-fit: cover;
  border-radius: 14px;
  margin-bottom: 16px;
}
.zone span {
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.08em;
  position: absolute;
  right: 22px;
  top: 16px;
  padding: 2px 10px;
  border-radius: 8px;
  background: rgba(5, 12, 24, 0.45);
}
.zones .zone-grid { grid-template-columns: repeat(2, 1fr); }
.zone:nth-child(1) { background: linear-gradient(180deg, rgba(30, 90, 160, 0.35), var(--card)); }
.zone:nth-child(2) { background: linear-gradient(180deg, rgba(80, 140, 70, 0.28), var(--card)); }
.zone:nth-child(3) { background: linear-gradient(180deg, rgba(180, 140, 40, 0.22), var(--card)); }
.zone:nth-child(4) { background: linear-gradient(180deg, rgba(90, 110, 70, 0.3), var(--card)); }

.screens { background: linear-gradient(180deg, transparent, rgba(20, 40, 70, 0.35), transparent); }
.screen-stage {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  align-items: center;
}
.phone-lg { width: 300px; margin: 0 auto; }
.screen-list { display: grid; gap: 10px; }
.screen-tab {
  text-align: left;
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid transparent;
  border-radius: 16px;
  padding: 16px 18px;
  cursor: pointer;
}
.screen-tab strong { display: block; margin-bottom: 4px; }
.screen-tab span { color: var(--muted); font-size: 13px; }
.screen-tab.is-active {
  border-color: var(--cyan);
  background: rgba(46, 167, 255, 0.1);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  list-style: none;
  counter-reset: none;
}
.steps li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.steps b {
  color: var(--cyan);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.steps h3 { margin: 10px 0 8px; }
.steps p { color: var(--muted); font-size: 14px; }

.download { padding: 0 6vw 100px; position: relative; z-index: 1; scroll-margin-top: 86px; }
.download-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: center;
  padding: 48px;
  border-radius: 32px;
  background:
    radial-gradient(circle at 80% 20%, rgba(46, 167, 255, 0.25), transparent 40%),
    linear-gradient(135deg, #101a2c, #0a1220);
  border: 1px solid var(--line);
}
.mini-phones {
  display: flex;
  justify-content: center;
  gap: 16px;
}
.mini-phones .phone { width: 160px; }
.mini-phones .phone:first-child { transform: rotate(-8deg) translateY(18px); }
.mini-phones .phone:last-child { transform: rotate(7deg); }

.footer {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 28px 6vw 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand img { width: 40px; height: 40px; border-radius: 10px; }
.footer-brand strong { color: var(--text); display: block; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(20px);
  background: #132033;
  border: 1px solid var(--line);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  z-index: 40;
  transition: 0.25s;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  animation: reveal 0.7s ease forwards;
}
@keyframes reveal {
  to { opacity: 1; transform: none; }
}

@media (max-width: 980px) {
  .hero, .screen-stage, .download-panel, .steps, .feature-grid {
    grid-template-columns: 1fr;
  }
  .zones .zone-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: 28px; }
  .hero-stage { min-height: 0; }
  .hud-br { display: none; }
  .phone-float {
    position: relative;
    width: 170px;
    margin: -40px auto 0;
    right: auto;
    bottom: auto;
    transform: rotate(6deg);
  }
  .menu-btn { display: grid; }
  .nav-links {
    display: none;
    position: absolute;
    top: 74px;
    right: 6vw;
    left: 6vw;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: #10182a;
    border: 1px solid var(--line);
    border-radius: 16px;
    overflow: hidden;
    z-index: 30;
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 14px 18px; }
  .nav-links .nav-cta {
    width: calc(100% - 32px);
    margin: 8px 16px 16px;
    text-align: center;
    justify-content: center;
  }
  .footer { flex-direction: column; align-items: flex-start; }
  .mini-phones .phone { width: 130px; }
  .download-panel { padding: 28px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-car, .reveal, .pulse { animation: none; }
  .reveal { opacity: 1; transform: none; }
}