:root {
  --bg: #030612;
  --ice: #8ab8ff;
  --plasma: #c084fc;
  --flare: #ffd48a;
  --text: #eef2fb;
  --muted: #93a0bd;
  --edge: rgba(138, 184, 255, .18);
  --glass: rgba(8, 13, 28, .72);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { overflow-x: hidden; overflow-x: clip; scroll-behavior: smooth; }
body {
  overflow-x: hidden;
  overflow-x: clip;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Noto Sans SC", "Noto Sans TC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}
#warp-canvas { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; }
.space-tint {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 30%, transparent 30%, rgba(3, 6, 18, .72) 100%),
    linear-gradient(180deg, transparent 55%, rgba(3, 6, 18, .92) 100%);
}
.content { position: relative; z-index: 2; }

.home-button {
  position: fixed; top: 20px; left: 20px; width: 48px; height: 48px; z-index: 10000;
  display: grid; place-items: center;
  color: rgba(255,255,255,.72);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 50%;
  background: rgba(8,13,28,.66);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  text-decoration: none;
  touch-action: none;
  user-select: none;
  transition: color .25s, border-color .25s;
}
.home-button:hover { color: #fff; border-color: var(--ice); }
.home-button svg { width: 20px; height: 20px; fill: currentColor; }

.shell { width: min(1140px, calc(100% - 48px)); margin: auto; }

/* 首屏 */
.hero {
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  text-align: center; align-items: center;
  padding: 110px 0 72px;
}
.eyebrow, .section-kicker {
  color: var(--ice);
  font: 600 12px/1 "Space Grotesk", Inter, sans-serif;
  letter-spacing: .3em; text-transform: uppercase;
}
.hero h1 {
  margin: 20px 0 18px;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: clamp(42px, 7.4vw, 88px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: .02em;
  background: linear-gradient(105deg, #fff 15%, var(--ice) 40%, var(--plasma) 65%, #fff 90%);
  background-size: 220% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 34px rgba(138, 184, 255, .3));
  animation: titleFlow 7s ease-in-out infinite;
}
@keyframes titleFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.hero-sub { max-width: 620px; color: var(--muted); font-size: clamp(15px, 2vw, 18px); }
.hero-stats {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 12px; margin-top: 44px;
}
.stat-chip {
  padding: 12px 22px;
  border: 1px solid var(--edge);
  border-radius: 12px;
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.stat-chip strong { display: block; color: var(--text); font: 600 19px/1.2 "Space Grotesk", sans-serif; }
.stat-chip small { color: var(--muted); font-size: 11px; letter-spacing: .1em; }
.hero-cta { margin-top: 40px; display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }
.btn-warp {
  padding: 15px 38px;
  border: 0; border-radius: 999px; cursor: pointer;
  background: linear-gradient(100deg, var(--ice), var(--plasma));
  color: #050a18;
  font: 700 14px/1 "Space Grotesk", "Noto Sans SC", sans-serif;
  letter-spacing: .1em;
  text-decoration: none; display: inline-block;
  box-shadow: 0 0 34px rgba(138, 184, 255, .35);
  transition: transform .25s, box-shadow .25s;
}
.btn-warp:hover { transform: translateY(-3px); box-shadow: 0 6px 44px rgba(192, 132, 252, .5); }
.scroll-hint {
  margin-top: 54px; color: var(--muted);
  font: 500 10px/1 "Space Grotesk", sans-serif; letter-spacing: .3em;
  animation: hintFloat 2.4s ease-in-out infinite;
}
@keyframes hintFloat { 0%,100% { transform: translateY(0); opacity: .55; } 50% { transform: translateY(6px); opacity: 1; } }

/* 章节 */
.section { padding: clamp(76px, 10vw, 128px) 0; }
.section-head { max-width: 720px; margin-bottom: 50px; }
.section-head h2 {
  margin-top: 14px;
  font: 600 clamp(30px, 4.6vw, 50px)/1.1 "Space Grotesk", "Noto Sans SC", sans-serif;
  letter-spacing: -.02em;
}
.section-head p { margin-top: 14px; color: var(--muted); }

/* 特性卡 */
.features-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.feature-card {
  min-width: 0;
  position: relative;
  overflow: hidden;
  padding: 34px 28px;
  border: 1px solid var(--edge);
  border-radius: 16px;
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform .3s, border-color .3s;
}
/* 周期性扫描光带划过卡片 */
.feature-card::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 30%, rgba(138, 184, 255, .09) 50%, transparent 70%);
  transform: translateX(-100%);
  animation: cardScan 5.5s ease-in-out infinite;
  pointer-events: none;
}
.feature-card:nth-child(2)::before { animation-delay: 1.8s; }
.feature-card:nth-child(3)::before { animation-delay: 3.6s; }
@keyframes cardScan {
  0%, 55% { transform: translateX(-100%); }
  85%, 100% { transform: translateX(100%); }
}
.feature-card:hover { transform: translateY(-5px); border-color: rgba(138, 184, 255, .45); }
.card-no { color: var(--plasma); font: 600 12px/1 "Space Grotesk", sans-serif; letter-spacing: .16em; }
.feature-card h3 { margin: 26px 0 12px; font: 600 19px/1.3 "Space Grotesk", "Noto Sans SC", sans-serif; }
.feature-card p { color: var(--muted); font-size: 13.5px; }

/* 技术参数 */
.spec-list { border-top: 1px solid var(--edge); }
.spec-row {
  display: grid; grid-template-columns: minmax(150px, .8fr) 1fr 1.4fr;
  gap: 24px; align-items: baseline;
  padding: 30px 4px;
  border-bottom: 1px solid var(--edge);
}
.spec-value {
  color: var(--flare);
  font: 600 clamp(22px, 3.4vw, 34px)/1.1 "Space Grotesk", sans-serif;
  letter-spacing: -.02em;
  white-space: nowrap;
  text-shadow: 0 0 22px rgba(255, 212, 138, .35);
  animation: specGlow 3.2s ease-in-out infinite;
}
@keyframes specGlow {
  0%, 100% { text-shadow: 0 0 14px rgba(255, 212, 138, .25); }
  50% { text-shadow: 0 0 30px rgba(255, 212, 138, .55); }
}

/* 滚动显现 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s cubic-bezier(.2,.8,.2,1), transform .8s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.spec-row h3 { font: 600 16px/1.4 "Space Grotesk", "Noto Sans SC", sans-serif; }
.spec-row p { color: var(--muted); font-size: 13.5px; }

/* 航线愿景 */
.route { position: relative; margin-top: 8px; padding-left: 26px; }
.route::before {
  content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px; width: 1px;
  background: linear-gradient(180deg, var(--ice), var(--plasma));
}
.route-stop { position: relative; padding: 16px 0 16px 12px; }
.route-stop::before {
  content: ""; position: absolute; left: -26px; top: 24px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--ice); border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--ice), 0 0 16px var(--ice);
}
/* 航点雷达脉冲 */
.route-stop::after {
  content: ""; position: absolute; left: -26px; top: 24px;
  width: 11px; height: 11px; border-radius: 50%;
  border: 1px solid var(--ice);
  animation: ping 2.6s ease-out infinite;
  pointer-events: none;
}
.route-stop:nth-child(2)::after { animation-delay: .8s; }
.route-stop:nth-child(3)::after { animation-delay: 1.6s; border-color: var(--plasma); }
@keyframes ping {
  0% { transform: scale(1); opacity: .8; }
  80%, 100% { transform: scale(3.2); opacity: 0; }
}
.route-stop:last-child::before { background: var(--plasma); box-shadow: 0 0 0 1px var(--plasma), 0 0 16px var(--plasma); }
.route-stop b { font: 600 16px "Space Grotesk", "Noto Sans SC", sans-serif; }
.route-stop p { color: var(--muted); font-size: 13.5px; margin-top: 4px; }

/* CTA */
.cta-section { text-align: center; padding-bottom: clamp(80px, 10vw, 130px); }
.cta-section h2 { font: 600 clamp(28px, 4.4vw, 46px)/1.2 "Space Grotesk", "Noto Sans SC", sans-serif; }
.cta-section p { color: var(--muted); margin: 14px 0 30px; }

footer { position: relative; z-index: 2; padding: 36px 20px; border-top: 1px solid var(--edge); text-align: center; background: rgba(3, 6, 18, .8); }
footer p, footer a { color: #fff; font-size: 12.5px; line-height: 1.9; text-decoration: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .scroll-hint, .hero h1, .feature-card::before, .route-stop::after, .spec-value { animation: none; }
  .feature-card, .btn-warp { transition: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}
@media (max-width: 860px) {
  .shell { width: min(100% - 32px, 620px); }
  .hero { padding: 100px 0 60px; }
  .hero-stats { gap: 8px; }
  .stat-chip { padding: 10px 14px; flex: 1 1 30%; min-width: 0; }
  .stat-chip strong { font-size: 15px; white-space: nowrap; }
  .stat-chip small { font-size: 10px; }
  .features-grid { grid-template-columns: 1fr; }
  .spec-row { grid-template-columns: 1fr; gap: 6px; padding: 24px 2px; }
}