:root{--blue:#0033a0;--bright:#0052cc;--deep:#002066;--ink:#0a1628;--body:#1e2a3a;--muted:#4a5568;--line:rgba(0,51,160,.14);--pale:#f5f7fa;--soft:#eef1f6;--radius:14px;--shadow:0 12px 36px rgba(0,33,102,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--body);background:#fff;font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.72;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.wrap{width:min(1220px,calc(100% - 32px));margin:auto}.topline{height:22px;background:var(--deep);color:#fff;font-size:12px;position:sticky;top:0;z-index:50}.topbar{height:22px;display:flex;align-items:center;justify-content:space-between}.plain{border:0;background:transparent;color:#fff;cursor:pointer}.sitehead{position:sticky;top:22px;z-index:49;background:#fff}.headrow{height:68px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;border-bottom:1px solid var(--line)}.logo{justify-self:start;display:flex;align-items:center;min-width:70px}.logo img{height:34px;width:auto;max-width:160px;object-fit:contain}.logo strong{font-size:24px;color:var(--blue)}.catalog-btn,.app-link,.btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;padding:0 18px;font-weight:700}.catalog-btn{border:1px solid var(--blue);background:#fff;color:var(--blue);cursor:pointer}.app-link{justify-self:end;background:linear-gradient(135deg,var(--bright),var(--blue),var(--deep));color:#fff}.tabs{height:44px;background:var(--pale);border-bottom:1px solid var(--line)}.tabrow{display:flex;gap:8px;height:44px;align-items:center}.tabrow a{padding:7px 12px;border-radius:7px;font-size:14px}.tabrow a.active{background:var(--blue);color:#fff}.hero,.section{padding:54px 0}.hero{padding-top:42px}.eyebrow{color:var(--blue);font-weight:800;letter-spacing:.08em}.hero h1{font-size:clamp(30px,4vw,46px);line-height:1.15;color:var(--ink);margin:10px 0 14px}.lead{max-width:820px;color:var(--muted);font-size:17px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.btn.primary{background:linear-gradient(135deg,var(--bright),var(--blue),var(--deep));color:#fff}.btn.secondary{border:1px solid var(--blue);color:var(--blue);background:#fff}.media-slot{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin:0 0 24px;text-align:center}.media-slot img{display:block;max-width:100%;width:100%;height:auto;max-height:300px;object-fit:contain;object-position:center;margin:auto}.media-slot.small img{max-height:230px}.media-slot.app img{max-height:420px;width:auto}.grid{display:grid;gap:18px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-6{grid-template-columns:repeat(3,1fr)}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.card h2,.card h3{color:var(--ink);margin:0 0 8px}.card p{margin:0;color:var(--muted)}.section.alt{background:var(--pale)}.section h2{font-size:26px;color:var(--ink);margin:0 0 20px}.number{font-size:38px;font-weight:900;color:var(--blue);line-height:1}.timeline{border-left:3px solid var(--line);padding-left:24px}.node{padding:8px 0 24px}.node b{color:var(--ink)}.badge{display:inline-block;background:var(--soft);color:var(--deep);padding:4px 8px;border-radius:6px;font-size:13px;font-weight:700}.prose{max-width:920px}.prose p{margin:0 0 16px}.faq article{padding:20px 0;border-bottom:1px solid var(--line)}.faq h2{font-size:20px;margin:0 0 8px}.footer{background:var(--ink);color:#a0aec0;padding:46px 0 80px}.footer a{display:block;margin:7px 0}.footer h3,.footer b{color:#fff}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:26px}.footer-brand img{height:32px;width:auto;object-fit:contain}.footer-brand span{display:block;font-size:12px}.footnote{max-width:900px;margin-top:26px}.copy{font-size:13px}.overlay{position:fixed;inset:0;background:rgba(10,22,40,.45);visibility:hidden;pointer-events:none;opacity:0;transition:.2s;z-index:70}.overlay.open{visibility:visible;pointer-events:auto;opacity:1}.panel{position:fixed;left:0;right:0;top:90px;background:#fff;z-index:80;max-height:calc(100vh - 90px);overflow:auto;visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-12px);transition:.2s}.panel.open{visibility:visible;pointer-events:auto;opacity:1;transform:none}.panel-head{display:flex;justify-content:space-between;align-items:center;padding:18px 0;border-bottom:1px solid var(--line)}.panel-head button{min-width:44px;min-height:44px;border:1px solid var(--line);background:#fff;border-radius:9px;cursor:pointer}.catalog-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;padding:22px 0 32px}.catalog-grid h3{color:var(--ink)}.catalog-grid a{display:block;padding:10px 0;border-bottom:1px solid var(--line)}.catalog-grid a b,.catalog-grid a span{display:block}.catalog-grid a span{font-size:13px;color:var(--muted)}.searchbox{padding-bottom:28px}.search-input{display:flex;gap:8px}.search-input input{flex:1;min-height:48px;border:1px solid var(--line);border-radius:9px;padding:0 12px}.search-input button{border:0;background:var(--blue);color:#fff;padding:0 18px;border-radius:9px}.quick{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}.quick a{background:var(--soft);padding:8px 12px;border-radius:8px}.mobile-nav{display:none}.callout{border-left:4px solid var(--blue);background:var(--soft);padding:18px 20px;border-radius:0 12px 12px 0}.index-cover{padding-top:30px}.index-cover .media-slot{max-width:1220px}.labels .card{border-top:4px solid var(--bright)}
@media(max-width:900px){.grid-3,.grid-6,.catalog-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){body{padding-bottom:58px}.tabs{display:none}.sitehead{top:22px}.headrow{height:62px;grid-template-columns:1fr auto 1fr}.logo img{height:30px}.catalog-btn,.app-link{padding:0 12px;font-size:14px}.hero,.section{padding:38px 0}.grid-3,.grid-2,.grid-6,.catalog-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.panel{top:84px;max-height:calc(100vh - 84px)}.searchpanel{inset:22px 0 0;top:22px;max-height:none;background:var(--pale)}.mobile-nav{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.mobile-nav a{min-height:50px;display:flex;align-items:center;justify-content:center;font-size:13px}.footer{padding-bottom:78px}.media-slot{margin-left:0;margin-right:0}.media-slot img{max-height:220px}.media-slot.small img{max-height:190px}.media-slot.app img{max-height:340px;width:auto}.wrap{width:min(100% - 32px,1220px)}}