:root{
  --bg:#fbfaf7;
  --card:#ffffff;
  --ink:#1f2933;
  --muted:#64748b;
  --line:#e8ecef;
  --soft:#f5efe8;
  --accent:#111827;
  --radius:26px;
  --shadow:0 18px 45px rgba(17,24,39,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.72}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{position:sticky;top:0;z-index:20;background:rgba(251,250,247,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.top-nav{max-width:1180px;margin:auto;display:flex;align-items:center;gap:22px;padding:14px 20px}
.brand-logo,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:.02em}
.brand-logo img,.footer-brand img{width:42px;height:42px;border-radius:14px;box-shadow:0 10px 20px rgba(17,24,39,.12)}
.nav-menu{margin-left:auto;display:flex;gap:4px;align-items:center;flex-wrap:wrap}
.nav-menu a{padding:10px 12px;border-radius:999px;color:#475569;font-size:15px}
.nav-menu a:hover,.nav-menu a.active{background:#111827;color:#fff}
.nav-toggle{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 14px}
.search-bar{max-width:1180px;margin:0 auto 14px;padding:0 20px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px}
.search-bar label{font-weight:800;color:#334155;white-space:nowrap}
.search-bar input{width:100%;border:1px solid var(--line);border-radius:999px;background:#fff;padding:12px 16px;font-size:15px;outline:none}
.search-bar input:focus{border-color:#111827;box-shadow:0 0 0 4px rgba(17,24,39,.08)}
.search-bar button,.btn{border:0;border-radius:999px;background:#111827;color:#fff;padding:12px 18px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.search-msg{grid-column:1/-1;margin:0;color:var(--muted);font-size:13px}
.hero{max-width:1180px;margin:36px auto 0;padding:0 20px;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);gap:28px;align-items:center}
.hero-copy{background:linear-gradient(135deg,#fff 0%,#f7efe5 100%);border:1px solid var(--line);border-radius:var(--radius);padding:42px;box-shadow:var(--shadow)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:900;color:#334155;background:#fff;border:1px solid var(--line);padding:8px 12px;border-radius:999px}
h1,h2,h3{line-height:1.22;margin:0 0 14px}h1{font-size:clamp(36px,5vw,64px);letter-spacing:-.04em}h2{font-size:clamp(28px,3.5vw,42px);letter-spacing:-.03em}h3{font-size:22px}.hero p,.section-lead{color:#475569;font-size:18px;margin:0 0 20px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn.secondary{background:#fff;color:#111827;border:1px solid var(--line)}
.hero-media{position:relative}.hero-media figure,.image-card figure{margin:0}.hero-media img{border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);aspect-ratio:4/3;object-fit:cover}.floating-card{position:absolute;left:22px;bottom:22px;background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:20px;padding:16px;box-shadow:0 18px 35px rgba(15,23,42,.12);max-width:280px}.floating-card strong{display:block;font-size:26px}.floating-card span{color:var(--muted)}
main section{max-width:1180px;margin:34px auto;padding:0 20px}.section-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}.section-head p{max-width:680px;color:var(--muted);margin:0}.grid{display:grid;gap:18px}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.pill-list{display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:18px 0 0;list-style:none}.pill-list li,.tags span{background:#f1f5f9;border:1px solid var(--line);border-radius:999px;padding:7px 11px;color:#475569;font-size:13px}
.feature,.product,.review,.faq-item,.contact-card,.timeline-item,.json-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px}.feature img,.product img,.image-card img{border-radius:18px;aspect-ratio:4/3;object-fit:cover;margin-bottom:16px}.feature p,.product p,.review p,.faq-item p,.contact-card p,.timeline-item p,.json-card p{color:var(--muted);margin:0}.product .price{font-size:24px;font-weight:900;color:#111827;margin:8px 0}.stars{letter-spacing:2px}.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.video-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:16px;box-shadow:0 10px 25px rgba(15,23,42,.06)}.video-shell{position:relative;border-radius:20px;overflow:hidden;background:#e5e7eb}.video-shell video{width:100%;aspect-ratio:16/10;display:block;object-fit:cover;background-size:cover}.play-badge{position:absolute;inset:0;margin:auto;width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.9);box-shadow:0 14px 30px rgba(15,23,42,.18);opacity:.88;transform:scale(.92);transition:.2s ease}.video-card:hover .play-badge{opacity:1;transform:scale(1.06)}.video-card p{color:var(--muted);margin:0 0 12px}.tags{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}.metrics{display:flex;flex-wrap:wrap;gap:10px;color:#475569;font-size:13px;border-top:1px solid var(--line);padding-top:12px}.story-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.breadcrumb{max-width:1180px;margin:20px auto 0;padding:0 20px;color:var(--muted);font-size:14px}.breadcrumb a{text-decoration:underline;text-underline-offset:3px}.content-block{font-size:17px}.content-block p{color:#475569}.check-list{padding-left:18px;color:#475569}.check-list li{margin:8px 0}.faq-item summary{cursor:pointer;font-weight:900}.faq-item details[open] summary{margin-bottom:10px}.share-row{display:flex;gap:10px;flex-wrap:wrap}.share-row button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:10px 14px;cursor:pointer}.site-footer{margin-top:44px;background:#111827;color:#f8fafc}.footer-grid{max-width:1180px;margin:auto;padding:34px 20px;display:grid;gap:12px}.footer-grid p{margin:0;color:#cbd5e1}.footer-brand img{width:46px;height:46px}.footer-brand strong{font-size:22px}.note{background:#fffbeb;border:1px solid #fde68a;border-radius:18px;padding:14px 16px;color:#92400e}.table-wrap{overflow:auto}.simple-table{width:100%;border-collapse:collapse;background:#fff;border-radius:18px;overflow:hidden}.simple-table th,.simple-table td{border-bottom:1px solid var(--line);padding:13px;text-align:left}.simple-table th{background:#f8fafc}.mobile-only{display:none}
@media(max-width:900px){.hero,.story-layout,.grid.two{grid-template-columns:1fr}.grid.three,.grid.four,.video-grid{grid-template-columns:1fr 1fr}.top-nav{align-items:flex-start}.nav-toggle{display:block}.nav-menu{display:none;width:100%;order:3;margin-left:0}.nav-menu.open{display:grid;grid-template-columns:1fr 1fr}.search-bar{grid-template-columns:1fr}.hero-copy{padding:28px}.section-head{display:block}.floating-card{position:static;margin-top:12px}.desktop-only{display:none}.mobile-only{display:block}}
@media(max-width:560px){.grid.three,.grid.four,.video-grid{grid-template-columns:1fr}.hero{margin-top:20px}.section-card{padding:24px}.search-bar label{white-space:normal}h1{font-size:36px}.nav-menu.open{grid-template-columns:1fr}}