:root{
  --bg:#f4f6f9;
  --paper:#fff;
  --ink:#12233a;
  --mute:#5b6b80;
  --line:#d5dde8;
  --navy:#16325c;
  --max:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);background:var(--bg);
  font:16px/1.85 "Georgia","Iowan Old Style","Songti SC","STSong","Microsoft YaHei",serif;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.wrap{width:min(var(--max),calc(100% - 48px));margin:auto}
nav{
  position:sticky;top:0;z-index:20;height:72px;
  background:rgba(244,246,249,.96);border-bottom:1px solid var(--line);
}
.nav,.hero-grid,.split,.visual,.faq-layout,.help-layout,.cta-in,.footer{display:grid;gap:32px;align-items:center}
.nav{height:72px;grid-template-columns:auto 1fr auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.04em}
.brand b{
  width:24px;height:24px;display:grid;place-items:center;
  background:var(--navy);color:#fff;font-size:10px;font-family:sans-serif;
}
.links{display:flex;justify-content:center;gap:28px;font-size:14px;color:var(--mute)}
.button{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:42px;padding:0 18px;border:0;font-weight:700;color:#fff;
  background:var(--navy);font-family:inherit;
}
.button.ghost{background:transparent;color:var(--navy);border:1px solid var(--line)}
.hero{padding:48px 0 72px}
.hero-grid{grid-template-columns:1.1fr .9fr;min-height:480px}
.eyebrow{color:var(--navy);font-size:12px;letter-spacing:.2em;font-family:sans-serif}
h1,h2,h3{margin:12px 0 16px;line-height:1.28;font-weight:700}
.hero h1{font-size:clamp(30px,4.4vw,46px)}
p,.lead{color:var(--mute)}
.actions,.micro{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.micro span{padding:4px 0;margin-right:14px;border-bottom:1px solid var(--line);font-size:13px}
.frame{padding:8px;background:var(--paper);border:1px solid var(--line)}
.frame img,.shot img,.visual img{width:100%;aspect-ratio:16/10;object-fit:cover}
.section{padding:72px 0}
.head{max-width:680px;margin-bottom:28px;padding-bottom:16px;border-bottom:1px solid var(--navy)}
.head h2,h2{font-size:clamp(24px,3.2vw,34px)}
.grid6,.review-grid,.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.card,.review,.download-card,.article{padding:22px;background:var(--paper)}
.scene{padding:16px;background:var(--paper);border:1px solid var(--line)}
.icon{font-size:12px;color:var(--navy);font-family:sans-serif;letter-spacing:.12em}
.card h3{margin:10px 0 8px}
.split,.visual,.faq-layout{grid-template-columns:1fr 1fr;gap:40px}
.scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0 24px}
.scene b{display:block;color:var(--navy);font-size:12px;font-family:sans-serif}
.visual{gap:0}
.visual img{aspect-ratio:16/11}
.visual-copy{padding:40px 32px;background:var(--paper);border:1px solid var(--line);border-left:0}
.metrics{display:flex;gap:28px;margin:20px 0 24px;padding-top:12px;border-top:1px solid var(--line)}
.metrics b{display:block;color:var(--navy);font-size:26px;font-family:sans-serif}
.person{display:flex;gap:10px;align-items:center;margin-top:14px}
.avatar{
  width:32px;height:32px;display:grid;place-items:center;
  background:var(--navy);color:#fff;font-size:12px;font-family:sans-serif;
}
.person small{display:block;color:var(--mute)}
.faq-layout{grid-template-columns:.85fr 1.15fr}
details{border-bottom:1px solid var(--line)}
summary{padding:16px 0;font-weight:700;cursor:pointer;list-style:none}
.cta{padding:8px 0 72px}
.cta-in{grid-template-columns:1fr auto;padding:28px;background:var(--paper);border:1px solid var(--navy)}
.page-head{padding:72px 0 18px}
.help-layout{grid-template-columns:200px 1fr;align-items:start}
.side{padding:16px;background:var(--paper);border:1px solid var(--line)}
.side a{display:block;padding:8px 0;color:var(--mute);border-bottom:1px solid var(--line)}
.policy{margin-top:16px;padding:16px;border:1px solid var(--line)}
.shot{margin:18px 0}
footer{padding:48px 0 16px;background:var(--navy);color:#f4f6f9}
.footer{grid-template-columns:1.4fr repeat(3,1fr);align-items:start}
.footer a,.footer p,.copy{color:#c5d0de}
.footer a{display:block;margin:8px 0}
.footer .brand b{background:#fff;color:var(--navy)}
.copy{margin-top:24px;padding-top:14px;border-top:1px solid #2c4a73}
@media(max-width:860px){
  .links{display:none}
  .hero-grid,.split,.visual,.faq-layout,.help-layout,.cta-in,.footer{grid-template-columns:1fr}
  .grid6,.review-grid,.cards,.scene-grid{grid-template-columns:1fr 1fr}
  .visual-copy{border-left:1px solid var(--line)}
}
@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}}