:root{
  --bg:#f6f7fb;
  --ink:#202124;
  --mute:#5f6368;
  --line:#dadce0;
  --acc:#1a73e8;
  --pop:#fff;
  --max:1100px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);background:var(--bg);
  font:16px/1.7 "Segoe UI","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:#fff;
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px}
.brand{font-weight:800}
.brand b{color:var(--acc)}
.links{display:flex;gap:16px;color:var(--mute);font-size:14px}
.button{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:36px;padding:0 16px;border:0;border-radius:18px;
  font-weight:700;color:#fff;background:var(--acc);
}
.button.ghost{background:#fff;color:var(--acc);border:1px solid #c5d4f0}
.chrome{margin:20px auto 0;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:0 10px 30px rgba(32,33,36,.08)}
.bar{display:flex;align-items:center;gap:8px;padding:8px 12px;background:#e8eaed;font-size:12px}
.dots i{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:4px;background:#9aa0a6}
.omni{flex:1;background:#fff;border-radius:16px;padding:6px 12px;color:var(--mute)}
.ext{width:28px;height:28px;border-radius:8px;background:var(--acc);color:#fff;display:grid;place-items:center;font-size:11px;font-weight:800}
.page{display:grid;grid-template-columns:1.2fr .8fr;min-height:360px}
.article-mock{padding:28px 32px}
.hl{background:#fff3c4;border-bottom:2px solid #f9ab00;padding:0 2px}
.tip{
  margin-top:12px;display:inline-block;background:#202124;color:#fff;border-radius:8px;padding:10px 12px;font-size:13px;
}
.popup{margin:24px 20px 20px;background:var(--pop);border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:0 8px 24px rgba(0,0,0,.08)}
.popup h3{margin:0 0 8px}
h1,h2,h3{margin:0 0 10px;line-height:1.25}
h1{font-size:clamp(26px,4vw,40px)}
h2{font-size:clamp(22px,3vw,32px)}
p,.lead{color:var(--mute);margin:0 0 12px}
.hero{padding:32px 0 8px}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.pills span{font-size:12px;padding:4px 10px;border-radius:999px;background:#e8f0fe;color:var(--acc);font-weight:700}
.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:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;
}
.icon{font-size:12px;color:var(--acc);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,.popup img{width:100%;border-radius:10px;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(--acc);font-size:12px}
.metrics{display:flex;gap:20px;margin:14px 0}
.metrics b{display:block;font-size:22px;color:var(--acc)}
.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;border-radius:12px;background:#202124;color:#fff}
.cta-in p{color:#bdc1c6}
.page-head{padding:36px 0 8px}
.help-layout{grid-template-columns:210px 1fr;align-items:start}
.side{padding:14px;border-radius:12px;background:#fff;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-radius:10px;border:1px solid var(--line)}
footer{padding:36px 0 14px;background:#202124;color:#fff}
.footer{grid-template-columns:1.4fr repeat(3,1fr)}
.footer a,.footer p,.copy{color:#bdc1c6}
.footer a{display:block;margin:7px 0}
.copy{margin-top:16px;padding-top:12px;border-top:1px solid #3c4043}
@media(max-width:900px){
  .links{display:none}
  .page,.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}}