:root{--bg:#1C1C1E;--deep:#141416;--card:#2A2A2E;--card2:#323238;--title:#F2F2F4;--text:#D8D8DC;--muted:#A0A0A8;--quiet:#7A7A82;--silver:#C8C8D0;--blue:#6A8AAA;--border:rgba(200,200,208,.16);--blueborder:rgba(106,138,170,.48);--shadow:0 12px 28px rgba(0,0,0,.28);--max:980px}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden;padding-bottom:0}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit}.site-wrap{width:min(calc(100% - 32px),var(--max));margin:auto}.frame-info{height:20px;background:#101012;color:var(--silver);position:fixed;top:0;left:0;right:0;z-index:120;font-size:12px}.frame-info-inner{height:20px;display:flex;align-items:center;justify-content:space-between}.text-button,.fold-button,.close-button{border:0;background:transparent;cursor:pointer;padding:0}.text-button,.close-button{min-height:44px}.brand-bar{height:54px;background:var(--bg);border-bottom:1px solid var(--blueborder);position:fixed;top:20px;left:0;right:0;z-index:119}.brand-inner{height:54px;display:flex;align-items:center;justify-content:space-between}.brand-link{display:flex;align-items:center;min-height:44px}.brand-logo,.footer-logo{height:24px;width:auto;max-width:160px;object-fit:contain}.brand-name{font-size:16px;font-weight:700;color:var(--title)}.brand-actions{display:flex;align-items:center;gap:10px}.app-link,.fold-button{min-height:44px;display:inline-flex;align-items:center;padding:0 14px;border:1px solid var(--border);border-radius:8px;color:var(--title)}.track-nav{height:42px;background:var(--card);position:fixed;top:74px;left:0;right:0;z-index:118;border-bottom:1px solid var(--border)}.track-inner{display:flex;height:42px;justify-content:center;align-items:stretch}.track-inner a{min-width:120px;display:flex;align-items:center;justify-content:center;font-size:13px;border-left:1px solid var(--border)}.track-inner a:last-child{border-right:1px solid var(--border)}.track-inner a.is-active{background:var(--blue);color:var(--title)}.page-main{padding-top:140px;min-height:70vh}.page-section{padding:44px 0}.page-section+.page-section{border-top:1px solid var(--border)}.hero-number{font-size:68px;line-height:.9;font-weight:800;color:rgba(200,200,208,.18);letter-spacing:-3px}.eyebrow{font-size:12px;letter-spacing:.12em;color:var(--silver);text-transform:uppercase}.page-title,h1{font-size:24px;line-height:1.3;color:var(--title);margin:14px 0 12px}h2{font-size:20px;line-height:1.35;color:var(--title);margin:0 0 14px}h3{font-size:16px;color:var(--title);margin:0 0 10px}p{margin:0 0 14px}.lead{font-size:17px;color:var(--silver);max-width:760px}.muted{color:var(--muted)}.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.btn{min-height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:8px;border:1px solid var(--blueborder);font-size:14px}.btn-primary{background:linear-gradient(135deg,#6A8AAA 0%,#3A4A5A 100%);color:var(--title)}.center-actions{justify-content:center}.btn-secondary{background:transparent;color:var(--silver)}a:hover,.text-button:hover,.fold-button:hover,.close-button:hover{filter:brightness(1.12)}a:focus-visible,button:focus-visible{outline:2px solid var(--silver);outline-offset:3px}.film-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px}.film-cell{min-height:148px;background:var(--deep);border:1px solid var(--border);border-radius:8px;display:flex;align-items:center;justify-content:center;padding:10px}.film-cell span{font-size:13px;color:var(--muted);text-align:center}.content-image{display:block;max-width:100%;width:auto;height:auto;max-height:260px;object-fit:contain;object-position:center;margin:16px auto}.film-cell .content-image{max-height:126px;margin:0}.quote-pair{display:grid;grid-template-columns:1fr 1fr;gap:14px}.quote-card,.gray-card,.info-card,.status-item,.method-card,.topic-card,.term-card{background:var(--card);border:1px solid var(--border);border-radius:9px;padding:22px}.quote-card{border-left:3px solid var(--blue)}.single-stack{display:grid;gap:14px}.two-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.status-list{display:grid;gap:10px}.status-item{display:flex;gap:16px;align-items:flex-start}.status-mark{flex:0 0 auto;font-size:12px;border:1px solid var(--blueborder);border-radius:999px;padding:4px 10px;color:var(--silver)}.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.timeline article{border-top:2px solid var(--blue);padding:18px;background:var(--card);border-radius:0 0 8px 8px}.center-product{text-align:center;max-width:720px;margin:auto}.app-image{display:block;max-width:100%;width:auto;height:auto;max-height:320px;object-fit:contain;margin:16px auto}.icon-image{display:block;width:48px;height:48px;object-fit:contain;margin:0 auto 12px}.article-flow{display:grid;gap:18px}.article-flow section{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:22px}.article-flow section:nth-child(even){background:var(--card2)}.center-card{max-width:720px;margin:0 auto;text-align:center;background:var(--card);border:1px solid var(--blueborder);border-radius:10px;padding:28px}.memo-list{display:grid;gap:10px}.memo-list article{display:grid;grid-template-columns:56px 1fr;gap:16px;background:var(--card);padding:18px;border-radius:8px;border:1px solid var(--border)}.memo-list b{font-size:12px;color:var(--silver)}.topic-list{display:grid;gap:12px}.topic-card{display:grid;grid-template-columns:minmax(140px,.5fr) 1fr;gap:18px;align-items:start}.banner-image{display:block;width:auto;max-width:100%;height:auto;max-height:200px;object-fit:contain;margin:0 auto 24px}.faq-list{display:grid;gap:12px}.faq-item{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:20px}.faq-item h2{font-size:16px}.terms{display:grid;gap:16px}.terms section{padding:20px 0;border-bottom:1px solid var(--border)}.site-footer{background:#101012;border-top:1px solid var(--border);color:var(--silver);padding:34px 0 76px;font-size:13px}.footer-grid{display:grid;grid-template-columns:1.35fr repeat(4,1fr);gap:22px}.footer-brand{display:flex;flex-direction:column;gap:6px}.footer-grid h2{font-size:13px;margin:0 0 8px;color:var(--title)}.footer-grid a{display:block;color:var(--muted);padding:3px 0}.footer-note,.footer-copy{border-top:1px solid var(--border);margin-top:24px;padding-top:18px}.footer-copy{margin-top:12px}.overlay{position:fixed;inset:0;background:rgba(0,0,0,.58);z-index:180;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.fold-panel{position:fixed;left:50%;top:50%;transform:translate(-50%,-48%);width:min(640px,92vw);max-height:min(78vh,700px);overflow:auto;background:var(--deep);border:1px solid var(--blueborder);box-shadow:var(--shadow);z-index:190;border-radius:10px;padding:20px;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.fold-panel.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,-50%)}.fold-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border);padding-bottom:14px}.fold-brand{display:flex;align-items:center;gap:10px}.fold-brand img{height:24px;width:auto;object-fit:contain}.fold-groups{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding-top:18px}.fold-groups h2{font-size:14px;margin-bottom:8px}.fold-groups a{display:grid;grid-template-columns:100px 1fr;gap:10px;padding:8px 0;border-bottom:1px solid var(--border)}.fold-groups span{color:var(--muted);font-size:12px}.search-panel{position:fixed;top:74px;left:0;right:0;background:var(--card);z-index:185;border-bottom:1px solid var(--blueborder);box-shadow:var(--shadow);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-10px);transition:.2s}.search-panel.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:none}.search-inner{padding:18px 0}.search-title{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}.search-title p{color:var(--muted);margin:2px 0}.search-presets{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.search-presets a{min-height:40px;display:inline-flex;align-items:center;padding:0 14px;border:1px solid var(--border);border-radius:8px}.no-scroll{overflow:hidden}.mobile-bottom{display:none}
@media(max-width:760px){body{padding-bottom:calc(48px + env(safe-area-inset-bottom))}.track-nav{display:none}.page-main{padding-top:94px}.brand-actions{gap:6px}.app-link,.fold-button{padding:0 10px}.film-strip{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}.quote-pair,.two-grid,.three-grid,.timeline,.footer-grid{grid-template-columns:1fr}.topic-card{grid-template-columns:1fr}.fold-groups{grid-template-columns:1fr}.fold-groups a{grid-template-columns:90px 1fr}.search-panel{top:0;bottom:0;background:var(--deep);padding-top:34px;overflow:auto}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;z-index:170;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#101012;border-top:1px solid var(--border)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px}.mobile-bottom a.is-active{background:var(--blue);color:var(--title)}.site-footer{padding-bottom:34px}.hero-number{font-size:56px}.page-section{padding:34px 0}.quote-card,.gray-card,.info-card,.status-item,.method-card,.topic-card,.term-card,.article-flow section,.center-card{padding:18px}.content-image{max-height:220px}.footer-grid{gap:16px}.frame-info-inner{font-size:11px}}
@media(max-width:420px){.site-wrap{width:min(calc(100% - 32px),var(--max))}.brand-name{font-size:15px}.film-strip{grid-template-columns:1fr}.status-item{flex-direction:column;gap:8px}.memo-list article{grid-template-columns:42px 1fr}}