:root{--bg:#F3F6F9;--surface:#fff;--muted:#E8EEF5;--ink:#0B1220;--text:#1E293B;--sub:#475569;--aux:#64748B;--blue:#2563EB;--blue2:#60A5FA;--blue3:#1D4ED8;--lime:#65A30D;--slate:#334155;--line:rgba(37,99,235,.16);--shadow:0 14px 36px rgba(11,18,32,.08);--radius:18px;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.78 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{display:block;max-width:100%;height:auto}.no-scroll{overflow:hidden}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.site-header{position:fixed;z-index:80;top:0;left:0;right:0}.status-bar{height:32px;background:var(--slate);color:#fff}.status-inner,.command-inner,.tab-inner{max-width:var(--max);margin:auto;padding:0 20px;display:flex;align-items:center}.status-inner{height:32px;justify-content:space-between}.status-brand{font-size:12px;font-weight:800;letter-spacing:.12em}.icon-button{min-width:44px;height:32px;border:0;background:transparent;color:#fff;font-size:12px}.command-bar{height:60px;background:#fff;border-bottom:1px solid rgba(15,23,42,.06)}.command-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr}.square-button{width:44px;height:44px;padding:10px;border:1px solid var(--line);border-radius:10px;background:#fff;display:flex;flex-direction:column;justify-content:center;gap:4px}.square-button span{display:block;height:2px;background:var(--ink);border-radius:2px}.command-logo{justify-self:center;display:flex;align-items:center;min-height:44px;font-weight:900;font-size:22px;letter-spacing:.03em;color:var(--ink)}.command-logo img{max-height:32px;width:auto}.app-link{justify-self:end;align-self:center;display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:999px;background:linear-gradient(135deg,var(--blue2) 0%,var(--blue) 52%,var(--blue3) 100%);color:#fff;font-weight:800;white-space:nowrap}.tab-bar{height:44px;background:#fff;border-bottom:1px solid #dbe4ef}.tab-inner{height:44px;gap:28px}.tab-link{height:44px;display:flex;align-items:center;position:relative;color:var(--sub);font-weight:700;white-space:nowrap}.tab-link.is-current{color:var(--blue)}.tab-link.is-current:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--blue);border-radius:3px 3px 0 0}
.site-main{padding-top:136px}.shell{max-width:var(--max);margin:auto;padding:0 20px}.page-hero{padding:54px 0 28px}.eyebrow{font-size:13px;letter-spacing:.12em;font-weight:900;color:var(--blue);text-transform:uppercase}.page-hero h1,.cover-card h1{font-size:clamp(28px,4vw,32px);line-height:1.25;color:var(--ink);margin:10px 0 14px}.lead{max-width:850px;font-size:18px;color:var(--sub)}.action-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border-radius:999px;font-weight:800}.btn-primary{color:#fff;background:linear-gradient(135deg,var(--blue2),var(--blue) 52%,var(--blue3))}.btn-secondary{background:#fff;color:var(--blue);border:1px solid var(--line)}.btn:hover,.btn:focus-visible,.tab-link:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid rgba(37,99,235,.25);outline-offset:3px}
.section{padding:30px 0}.section-title{display:flex;gap:16px;align-items:end;justify-content:space-between;margin-bottom:18px}.section-title h2{margin:0;color:var(--ink);font-size:24px;line-height:1.3}.section-title p{margin:0;color:var(--aux);max-width:620px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.media-slot{margin:0;background:linear-gradient(135deg,#e9eff7,#fff);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;align-items:center;justify-content:center;aspect-ratio:16/8}.media-slot img{width:100%;height:100%;object-fit:contain}.media-placeholder span{font-size:14px;font-weight:900;letter-spacing:.16em;color:#94a3b8}.media-tall{aspect-ratio:4/5}.media-wide{aspect-ratio:16/7}.compact-media{max-height:340px}.tag-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.topic-strip{display:flex;align-items:flex-start;gap:11px;padding:16px;border-top:1px solid #dde5ee}.topic-strip:first-child{border-top:0}.blue-dot{flex:0 0 9px;width:9px;height:9px;margin-top:9px;border-radius:50%;background:var(--blue)}.topic-strip strong{color:var(--ink)}.topic-strip p{margin:3px 0 0;color:var(--sub);font-size:14px}.topic-strip:hover{background:#f8fbff}.number-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.number-card{padding:20px;border-radius:16px;background:#fff;border:1px solid var(--line)}.number-card b{display:block;color:var(--blue);font-size:30px;line-height:1;margin-bottom:10px}.number-card p{margin:0;color:var(--sub)}.mosaic-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.mosaic-3 article{display:flex;flex-direction:column;gap:14px}.mosaic-3 h3,.stack-card h3{margin:0;color:var(--ink)}.mosaic-3 p,.stack-card p{margin:0;color:var(--sub)}.stack{display:grid;gap:18px}.mural{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.mural article{min-height:170px}.file-list{display:grid;gap:10px}.file-item{display:grid;grid-template-columns:46px 1fr auto;gap:14px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px}.file-code{width:38px;height:38px;border-radius:10px;background:#eaf2ff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:900}.file-item p{margin:2px 0 0;color:var(--sub);font-size:14px}.file-item em{font-style:normal;color:var(--blue);font-size:13px}.rank-list{display:grid;gap:10px}.rank-row{display:grid;grid-template-columns:70px 1fr;gap:18px;align-items:start;padding:22px 0;border-bottom:1px solid #dbe4ef}.rank-row .big-num{font-size:48px;line-height:1;font-weight:950;color:var(--blue)}.rank-row h3{margin:0 0 6px;color:var(--ink)}.rank-row p{margin:0;color:var(--sub)}.timeline{position:relative;margin-left:12px;padding-left:28px;border-left:2px solid #cbd9ee}.timeline article{position:relative;padding:0 0 26px}.timeline article:before{content:"";position:absolute;left:-36px;top:8px;width:14px;height:14px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px #e9f0ff}.status-pill{display:inline-flex;padding:4px 10px;border-radius:999px;background:#eaf2ff;color:var(--blue);font-size:12px;font-weight:900}.prose-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:26px}.article-body{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px}.article-body h2{color:var(--ink);font-size:21px;margin:28px 0 8px}.article-body h2:first-child{margin-top:0}.article-body p{margin:0 0 16px}.article-body .note-label{display:inline-flex;padding:4px 10px;border-radius:999px;background:#eef6e7;color:#4d7c0f;font-size:12px;font-weight:900}.aside-list{display:grid;gap:12px;align-content:start}.aside-list a{display:block;padding:16px;border-radius:14px;background:#fff;border:1px solid var(--line);font-weight:800;color:var(--ink)}.long-bars{display:grid;gap:12px}.long-bar{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;display:grid;grid-template-columns:120px 1fr auto;gap:18px;align-items:start}.long-bar b{color:var(--blue)}.long-bar p{margin:0;color:var(--sub)}.serial-guide{display:grid;gap:14px}.serial-item{display:grid;grid-template-columns:80px 1fr;gap:18px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:16px}.serial-item .serial-no{font-weight:950;color:var(--blue);font-size:24px}.serial-item h3{margin:0 0 6px}.serial-item p{margin:0;color:var(--sub)}.steps{counter-reset:step;display:grid;gap:14px}.step{counter-increment:step;background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;display:grid;grid-template-columns:54px 1fr;gap:16px}.step:before{content:counter(step,decimal-leading-zero);width:46px;height:46px;border-radius:14px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900}.step h3{margin:0 0 6px}.step p{margin:0;color:var(--sub)}.policy-list{display:grid;gap:14px}.policy-list article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}.policy-list h2{margin:0 0 8px;color:var(--ink);font-size:20px}.policy-list p{margin:0}.faq-list{display:grid;gap:12px}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 20px}.faq-list summary{cursor:pointer;font-weight:850;color:var(--ink);padding:18px 0}.faq-list p{margin:0;padding:0 0 20px;color:var(--sub)}
.cover-card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:20px;padding:30px;margin-top:34px}.cover-media{margin-top:24px}.home-intro{max-width:820px;color:var(--sub)}.service-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:24px;align-items:center}.small-badge{width:68px;height:68px;aspect-ratio:1/1}.editor-note{padding:12px 14px;border-left:4px solid var(--lime);background:#f6faef;color:#40551a;border-radius:0 12px 12px 0}.callout{background:#eaf2ff;border:1px solid var(--line);border-radius:16px;padding:20px;color:var(--text)}
.site-footer{margin-top:60px;background:#0B1220;color:#D6E4FF;padding:52px 0 calc(32px + env(safe-area-inset-bottom))}.footer-inner{max-width:var(--max);margin:auto;padding:0 20px}.footer-brand-block{display:flex;align-items:center;gap:14px;padding-bottom:24px;border-bottom:1px solid rgba(214,228,255,.18)}.footer-mark img{max-height:30px;width:auto}.footer-brand-block span{display:block;color:#93b4e8;font-size:13px}.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;padding:28px 0}.footer-grid h2{font-size:14px;margin:0 0 12px;color:#fff}.footer-grid a{display:block;color:#bed2f1;padding:4px 0}.footer-note,.footer-copy{color:#91a9cb;font-size:13px;margin:8px 0}
.overlay{position:fixed;z-index:90;inset:0;background:rgba(11,18,32,.45);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.mega-menu{position:fixed;z-index:100;inset:0 0 auto 0;max-height:100vh;overflow:auto;background:#f7f9fc;padding:28px max(20px,calc((100vw - var(--max))/2 + 20px)) 36px;transform:translateY(-102%);visibility:hidden;pointer-events:none;transition:transform .25s ease,visibility .25s}.mega-menu.is-open{transform:translateY(0);visibility:visible;pointer-events:auto}.mega-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid #dbe4ef}.mega-brand{display:flex;align-items:center;gap:12px;font-weight:900}.mega-brand img{max-height:28px;width:auto}.close-button{min-height:44px;padding:0 16px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--blue);font-weight:800}.mega-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:22px}.mega-grid section{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.mega-grid h2{margin:0 0 10px;color:var(--blue);font-size:15px}.mega-grid a{display:block;padding:10px 0;border-top:1px solid #e6ebf2}.mega-grid a:first-of-type{border-top:0}.mega-grid strong{display:block;color:var(--ink)}.mega-grid span{display:block;color:var(--sub);font-size:13px;margin-top:3px}.search-layer{position:fixed;z-index:101;top:92px;left:0;right:0;visibility:hidden;pointer-events:none}.search-layer.is-open{visibility:visible;pointer-events:auto}.search-card{max-width:900px;margin:auto;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 18px 18px;padding:22px}.search-head{display:flex;align-items:center;justify-content:space-between}.search-box{display:block;margin:18px 0}.search-box input{width:100%;height:50px;border:1px solid #cbd5e1;border-radius:14px;padding:0 16px;color:var(--ink);background:#f8fafc}.search-links{display:flex;flex-wrap:wrap;gap:10px}.search-links a{display:inline-flex;min-height:44px;align-items:center;padding:0 15px;border:1px solid var(--line);border-radius:999px;color:var(--blue);font-weight:800}.mobile-dock{display:none}
@media(max-width:900px){.tag-strip,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3,.mosaic-3{grid-template-columns:1fr}.prose-grid,.service-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mega-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.long-bar{grid-template-columns:90px 1fr}.long-bar>*:last-child{grid-column:2}.mural{grid-template-columns:1fr 1fr}}
@media(max-width:680px){body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}.site-main{padding-top:92px}.tab-bar{display:none}.status-inner,.command-inner,.shell,.footer-inner{padding-left:16px;padding-right:16px}.status-inner{padding-right:10px}.command-inner{grid-template-columns:1fr auto 1fr}.command-logo{font-size:20px}.app-link{padding:0 13px;font-size:13px}.page-hero{padding:38px 0 18px}.lead{font-size:16px}.section{padding:22px 0}.section-title{align-items:flex-start;flex-direction:column;gap:6px}.grid-2,.tag-strip,.number-grid,.mural{grid-template-columns:1fr}.cover-card{padding:22px 18px;margin-top:22px}.file-item{grid-template-columns:42px 1fr}.file-item em{grid-column:2}.rank-row{grid-template-columns:52px 1fr}.rank-row .big-num{font-size:38px}.serial-item{grid-template-columns:58px 1fr}.long-bar{grid-template-columns:1fr;gap:5px}.long-bar>*:last-child{grid-column:auto}.mega-menu{padding:16px;max-height:100vh}.mega-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.mega-grid section{padding:12px}.mega-grid a{padding:9px 0}.mega-grid span{font-size:12px}.search-layer{top:0;bottom:0;background:var(--bg);padding:0}.search-card{height:100%;border:0;border-radius:0;box-shadow:none;padding:22px 16px}.footer-grid{grid-template-columns:1fr 1fr}.mobile-dock{position:fixed;z-index:70;left:12px;right:12px;bottom:calc(8px + env(safe-area-inset-bottom));height:50px;display:grid;grid-template-columns:repeat(5,1fr);align-items:stretch;background:#fff;border:1px solid var(--line);box-shadow:0 12px 30px rgba(11,18,32,.16);border-radius:18px;overflow:hidden}.mobile-dock a{display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--sub);font-weight:800;position:relative}.mobile-dock a.is-current{color:var(--blue)}.mobile-dock a.is-current:before{content:"";position:absolute;top:4px;width:24px;height:3px;background:var(--blue);border-radius:3px}.site-footer{padding-bottom:80px}.media-slot{aspect-ratio:16/9}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}