:root{
  --ink:#101310;
  --ink-2:#171d16;
  --paper:#f4f1e8;
  --muted:#b9beb3;
  --red:#ff392d;
  --line:rgba(243,244,235,.14);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font);
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;-webkit-tap-highlight-color:transparent}
h1,h2,h3{margin:0;font-weight:600;letter-spacing:.02em}
p{margin:0}
code{font-family:var(--mono)}

.page{width:100%;max-width:640px;margin:0 auto;background:var(--ink);position:relative}

/* ---------- 通用元素 ---------- */
.eyebrow{
  font-family:var(--mono);
  font-size:9px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
  display:block;
}
.reveal{opacity:0;transform:translateY(16px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

.cta{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  width:100%;margin-top:26px;padding:17px 20px;
  background:var(--red);color:#fff;
  border-radius:4px;font-size:15px;font-weight:600;letter-spacing:.06em;
  box-shadow:0 10px 30px rgba(255,57,45,.28);
  transition:transform .18s ease,box-shadow .18s ease;
}
.cta:active{transform:translateY(1px) scale(.995);box-shadow:0 4px 16px rgba(255,57,45,.24)}
.cta svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}
.cta-ghost{
  background:transparent;color:var(--paper);
  border:1px solid var(--line);box-shadow:none;
}
.cta-ghost:active{background:rgba(255,255,255,.05);box-shadow:none}

/* ---------- 主视觉 ---------- */
.hero{
  position:relative;
  min-height:100svh;
  min-height:100vh;
  display:flex;flex-direction:column;
  padding:calc(20px + env(safe-area-inset-top)) 22px calc(34px + env(safe-area-inset-bottom));
  overflow:hidden;
  isolation:isolate;
}
.hero-img{
  position:absolute;inset:0;z-index:-3;
  width:100%;height:100%;object-fit:cover;object-position:58% 42%;
  transform:scale(1.04);
  animation:heroZoom 14s ease-out forwards;
}
@keyframes heroZoom{to{transform:scale(1)}}
.hero-veil{
  position:absolute;inset:0;z-index:-2;
  background:
    linear-gradient(180deg,rgba(9,12,9,.72) 0%,rgba(9,12,9,.24) 34%,rgba(9,12,9,.62) 62%,rgba(16,19,16,.97) 100%),
    linear-gradient(90deg,rgba(9,12,9,.5),transparent 62%);
}
.hero-glow{
  position:absolute;left:50%;bottom:-14%;z-index:-1;
  width:150%;aspect-ratio:1;transform:translateX(-50%);
  background:radial-gradient(circle,rgba(255,57,45,.2),transparent 58%);
  pointer-events:none;
}

.brand{display:flex;align-items:center;gap:11px}
.brand img{width:46px;height:46px;object-fit:contain;background:#000;border-radius:3px}
.brand-text{display:flex;flex-direction:column;gap:4px}
.brand-text strong{font-size:15px;letter-spacing:.22em;font-weight:600}
.brand .eyebrow{font-size:7.5px;letter-spacing:.14em}

.hero-copy{margin-top:auto;padding-top:40px}
.hero-copy .eyebrow{margin-bottom:14px;color:#cdd3c6}
.hero-copy h1{
  font-size:clamp(40px,13vw,62px);
  letter-spacing:.14em;
  line-height:1.05;
  text-shadow:0 4px 30px rgba(0,0,0,.55);
}
.hero-copy .sub{
  margin-top:12px;font-size:15px;letter-spacing:.3em;color:#e8e4d8;
  text-shadow:0 2px 14px rgba(0,0,0,.6);
}
.hero-copy .lede{
  margin-top:18px;font-size:14px;line-height:1.85;color:#d7dbcf;
  max-width:22em;text-shadow:0 2px 12px rgba(0,0,0,.55);
}
.cta-hint{
  margin-top:11px;font-size:10.5px;letter-spacing:.1em;color:#a8b0a2;text-align:center;
}

.scroll-cue{
  position:absolute;left:50%;bottom:calc(12px + env(safe-area-inset-bottom));
  transform:translateX(-50%);width:1px;height:34px;overflow:hidden;
}
.scroll-cue span{
  display:block;width:1px;height:14px;background:linear-gradient(var(--red),transparent);
  animation:cue 1.8s ease-in-out infinite;
}
@keyframes cue{0%{transform:translateY(-14px)}100%{transform:translateY(34px)}}

/* ---------- 内容区 ---------- */
.section{padding:56px 22px}
.section + .section{border-top:1px solid var(--line)}
.section h2{font-size:24px;margin-top:12px;letter-spacing:.06em}
.section-note{margin-top:12px;font-size:13px;color:#b8bdb0;line-height:1.85}

.cards{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:2px}
.card{
  padding:20px 0;border-top:1px solid var(--line);
  display:grid;grid-template-columns:auto 1fr;gap:6px 16px;
}
.card-no{
  font-family:var(--mono);font-size:11px;color:var(--red);
  padding-top:4px;letter-spacing:.05em;
}
.card h3{font-size:16px;letter-spacing:.05em}
.card p{grid-column:2;font-size:13px;color:#b8bdb0;line-height:1.8;margin-top:6px}

/* ---------- 抵达 ---------- */
.flow{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  margin:24px 0 20px;font-size:13px;color:#dfe3d7;
}
.flow span{padding:7px 13px;border:1px solid var(--line);border-radius:3px;background:rgba(255,255,255,.02)}
.flow svg{width:16px;height:16px;fill:none;stroke:#7c8a72;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex:none}

.coord{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  padding:15px 16px;border:1px solid var(--line);border-radius:4px;
  background:var(--ink-2);
}
.dot{width:6px;height:6px;border-radius:50%;background:var(--red);box-shadow:0 0 10px rgba(255,57,45,.6);flex:none}
.coord-label{font-size:12px;color:#a9b1a1;letter-spacing:.08em}
.coord code{font-size:12.5px;color:#e9ece2;letter-spacing:.04em}

.nav-links{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
.nav-links a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:15px 16px;border:1px solid var(--line);border-radius:4px;
  font-size:13px;transition:background .18s;
}
.nav-links a:active{background:rgba(255,255,255,.06)}
.nav-links svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;opacity:.6;flex:none}

/* ---------- 实景 ---------- */
.shots{display:grid;gap:14px;margin-top:24px}
.shots figure{margin:0}
.shots img{width:100%;border-radius:4px;border:1px solid var(--line);background:#000}
.shots figcaption{margin-top:9px;font-size:11px;letter-spacing:.1em;color:#8e968a}

/* ---------- 页脚 ---------- */
.foot{
  padding:44px 22px calc(40px + env(safe-area-inset-bottom));
  border-top:1px solid var(--line);
  text-align:center;
}
.foot img{margin:0 auto 14px;opacity:.85}
.foot p{font-size:12px;letter-spacing:.14em;color:#c3c8bb}
.foot-note{margin-top:14px;font-size:10.5px;line-height:1.8;letter-spacing:.02em;color:#7d8577}

/* ---------- 大屏 ---------- */
@media(min-width:641px){
  body{background:#0a0c0a}
  .page{box-shadow:0 0 90px rgba(0,0,0,.6);min-height:100vh}
  .hero{min-height:88vh}
  .section{padding:64px 34px}
  .cards{grid-template-columns:1fr 1fr;gap:0 26px}
}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  .hero-img{transform:none}
}