:root{
  --bg:#fff;
  --ink:#111;
  --mute:#5c5c5c;
  --line:#e6e6e6;
  --vs:#ff4d1c;
  --ai:#111;
  --card:#f6f6f6;
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);background:var(--bg);
  font:16px/1.7 "Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.wrap{width:min(var(--max),calc(100% - 28px));margin:auto}
nav{
  position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:58px}
.brand{font-weight:800;letter-spacing:-.03em}
.brand b{color:var(--vs)}
.links{display:flex;gap:16px;color:var(--mute);font-size:14px}
.button{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:40px;padding:0 16px;border:0;border-radius:0;
  font-weight:800;color:#fff;background:var(--vs);
}
.button.ghost{background:#fff;color:var(--ink);border:1px solid var(--ink)}
.hero{padding:36px 0 8px}
h1,h2,h3{margin:0 0 10px;line-height:1.15;letter-spacing:-.03em}
h1{font-size:clamp(28px,4.4vw,46px)}
h2{font-size:clamp(22px,3vw,32px)}
p,.lead{color:var(--mute);margin:0 0 12px}
.chain{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0;font-size:13px;font-weight:800}
.chain span{padding:4px 8px;background:#111;color:#fff}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.board{display:grid;grid-template-columns:1fr 48px 1fr;margin-top:28px;border:1px solid var(--ink)}
.col{padding:22px}
.col.l{background:#f3f1ee}
.col.r{background:#111;color:#fff}
.col.r p{color:#cfcfcf}
.mid{
  display:flex;align-items:center;justify-content:center;
  background:var(--vs);color:#fff;font-weight:900;writing-mode:vertical-rl;letter-spacing:.2em;
}
.item{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-top:1px solid rgba(0,0,0,.12)}
.col.r .item{border-top-color:rgba(255,255,255,.16)}
.item b{font-size:20px}
.col img{width:100%;aspect-ratio:16/10;object-fit:cover;margin-top:14px;filter:grayscale(.2)}
.section{padding:46px 0}
.head{margin-bottom:16px;max-width:640px}
.grid6,.review-grid,.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.card,.review,.download-card,.article,.scene{
  background:var(--card);border:1px solid var(--line);padding:16px;
}
.icon{font-size:12px;color:var(--vs);font-weight:800}
.split,.visual,.faq-layout,.help-layout,.cta-in,.footer{display:grid;gap:18px}
.split,.visual,.faq-layout{grid-template-columns:1fr 1fr;align-items:center}
.split img,.visual img,.shot img{width:100%;aspect-ratio:16/10;object-fit:cover}
.scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0 16px}
.scene b{display:block;color:var(--vs);font-size:12px}
.metrics{display:flex;gap:20px;margin:14px 0}
.metrics b{display:block;font-size:22px}
.person{margin-top:8px}
.person small{display:block;color:var(--mute)}
details{border-bottom:1px solid var(--line)}
summary{padding:12px 0;font-weight:700;cursor:pointer;list-style:none}
.cta{padding:8px 0 46px}
.cta-in{grid-template-columns:1.3fr auto;align-items:center;padding:22px;background:#111;color:#fff}
.cta-in p{color:#cfcfcf}
.page-head{padding:36px 0 8px}
.help-layout{grid-template-columns:210px 1fr;align-items:start}
.side{padding:14px;background:var(--card);border:1px solid var(--line);position:sticky;top:72px}
.side a{display:block;padding:7px 4px;color:var(--mute)}
.policy{margin-top:12px;padding:14px;border:1px solid var(--line)}
footer{padding:36px 0 14px;background:#111;color:#fff}
.footer{grid-template-columns:1.4fr repeat(3,1fr)}
.footer a,.footer p,.copy{color:#b5b5b5}
.footer a{display:block;margin:7px 0}
.copy{margin-top:16px;padding-top:12px;border-top:1px solid #333}
@media(max-width:900px){
  .links{display:none}
  .board{grid-template-columns:1fr}
  .mid{writing-mode:horizontal-tb;padding:10px 0}
  .split,.visual,.faq-layout,.help-layout,.cta-in,.footer{grid-template-columns:1fr}
  .grid6,.review-grid,.cards,.scene-grid{grid-template-columns:1fr 1fr}
  .side{position:static}
}
@media(max-width:560px){.grid6,.review-grid,.cards,.scene-grid,.footer{grid-template-columns:1fr}}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}