:root{--bg:#F3F6F9;--surface:#fff;--sub:#E8EEF5;--title:#0B1220;--text:#1E293B;--muted:#475569;--soft:#64748B;--blue:#2563EB;--light-blue:#60A5FA;--deep-blue:#1D4ED8;--lime:#65A30D;--slate:#334155;--line:rgba(37,99,235,.16);--shadow:0 14px 36px rgba(11,18,32,.08);--max:1180px;--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}button,input{font:inherit}.wrap{width:min(calc(100% - 32px),var(--max));margin-inline:auto}.skip-link{position:fixed;left:12px;top:-60px;z-index:1000;background:#fff;color:var(--blue);padding:10px 14px;border-radius:10px}.skip-link:focus{top:8px}.site-header{position:fixed;inset:0 0 auto;z-index:200}.status-bar{height:32px;background:var(--slate);color:#fff}.status-inner,.command-inner,.tab-inner{height:100%;display:flex;align-items:center}.status-inner{justify-content:space-between;font-size:13px}.status-brand{font-weight:750;letter-spacing:.04em;min-height:44px;margin:-6px 0;display:flex;align-items:center}.plain-action{border:0;background:transparent;color:#fff;min-width:44px;height:44px;margin:-6px 0;cursor:pointer}.plain-action:focus-visible,.square-action:focus-visible,.square-close:focus-visible,a:focus-visible{outline:3px solid rgba(96,165,250,.55);outline-offset:3px}.command-bar{height:60px;background:#fff;border-bottom:1px solid var(--line)}.command-inner{display:grid;grid-template-columns:1fr auto 1fr;gap:12px}.square-action{width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;display:grid;align-content:center;gap:4px;padding:0 12px;cursor:pointer}.square-action span{height:2px;background:var(--slate);border-radius:2px}.command-logo{justify-self:center;display:flex;align-items:center;height:44px}.command-logo img{max-height:32px;width:auto}.command-logo strong{font-size:20px;letter-spacing:.02em}.app-entry{justify-self:end;min-height:44px;display:inline-flex;align-items:center;padding:0 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var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.hero-card{padding:clamp(24px,4vw,48px)}h1,h2,h3{color:var(--title);line-height:1.25;margin:0}h1{font-size:clamp(28px,4vw,32px);letter-spacing:-.03em;margin-top:8px}h2{font-size:clamp(21px,3vw,26px)}h3{font-size:18px}.lead{font-size:17px;color:var(--muted);max-width:820px;margin:18px 0 0}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn{min-height:44px;padding:0 20px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-weight:750}.btn-primary{background:linear-gradient(135deg,#60A5FA 0%,#2563EB 52%,#1D4ED8 100%);color:#fff}.btn-secondary{background:#fff;color:var(--blue);border:1px solid rgba(37,99,235,.28)}.media-slot{margin:24px 0 0;border-radius:16px;overflow:hidden;background:linear-gradient(145deg,#E8EEF5,#F8FAFC);border:1px solid var(--line)}.media-slot 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.num,.big-number{font-size:42px;line-height:1;color:var(--blue);font-weight:850;letter-spacing:-.05em}.number-card h3{margin-top:14px}.number-card p{color:var(--muted);font-size:15px}.three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.feature-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}.feature-card .media-slot{margin:0;border:0;border-radius:0;box-shadow:none}.feature-card .media-placeholder{min-height:170px}.feature-copy{padding:22px}.feature-copy p{color:var(--muted)}.stack{display:grid;gap:16px}.split-card{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:24px;align-items:center;padding:24px;background:#fff;border:1px solid var(--line);border-radius:18px}.split-card .media-slot{margin:0}.quad-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.quad-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px}.file-list{display:grid;gap:10px}.file-row{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px}.file-tag{font-size:12px;font-weight:800;color:var(--blue);background:rgba(37,99,235,.08);padding:5px 8px;border-radius:999px}.file-row p{margin:2px 0 0;color:var(--muted);font-size:14px}.meter-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.meter-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}.timeline{position:relative;display:grid;gap:18px;padding-left:28px}.timeline:before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:rgba(37,99,235,.18)}.timeline-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}.timeline-item:before{content:"";position:absolute;left:-25px;top:28px;width:12px;height:12px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px var(--bg)}.status-label{font-size:12px;font-weight:800;color:var(--blue);letter-spacing:.05em}.service-card{display:grid;grid-template-columns:.8fr 1.2fr;gap:28px;align-items:center}.service-card .media-slot{margin:0}.inline-badge{display:flex;align-items:center;gap:10px;margin-top:18px}.inline-badge img{width:40px;height:40px;object-fit:contain}.rich-text{background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(24px,4vw,38px)}.rich-text p{margin:14px 0;color:var(--text)}.rich-text .note{color:var(--muted);font-size:14px}.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px}.side-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;align-self:start;position:sticky;top:156px}.side-card a{display:block;padding:10px 0;color:var(--muted);border-bottom:1px solid var(--line)}.side-card a:last-child{border-bottom:0}.long-strip{display:grid;grid-template-columns:72px 1fr auto;gap:18px;align-items:start;padding:20px 0;border-top:1px solid var(--line)}.long-strip:first-child{border-top:0}.long-strip .index{font-size:24px;font-weight:800;color:var(--blue)}.long-strip p{margin:6px 0 0;color:var(--muted)}.type-index{display:flex;flex-wrap:wrap;gap:10px}.type-index a{padding:10px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--blue);min-height:44px;display:inline-flex;align-items:center}.episode-guide{display:grid;gap:10px}.episode-item{display:grid;grid-template-columns:64px 1fr;gap:18px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.episode-item strong{color:var(--blue)}.quote-note{border-left:4px solid var(--blue);padding:14px 18px;background:rgba(37,99,235,.06);border-radius:0 12px 12px 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0}.backdrop{position:fixed;inset:0;background:rgba(11,18,32,.42);z-index:310;opacity:0;pointer-events:none;transition:.2s}.backdrop.is-open{opacity:1;pointer-events:auto}.mosaic-menu{position:fixed;inset:0;z-index:320;background:var(--bg);visibility:hidden;pointer-events:none;transform:translateY(-16px);opacity:0;transition:.22s;overflow:auto;padding-bottom:40px}.mosaic-menu.is-open{visibility:visible;pointer-events:auto;transform:none;opacity:1}.mosaic-head{height:82px;display:flex;align-items:center;justify-content:space-between}.mosaic-brand{display:flex;align-items:center;gap:12px}.mosaic-brand img{max-width:110px;max-height:32px}.mosaic-brand div{display:grid}.mosaic-brand span{font-size:12px;color:var(--soft)}.square-close{width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--slate);font-size:26px;cursor:pointer}.mosaic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.mosaic-grid section{background:#fff;border:1px solid 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@media (max-width:900px){.topic-grid{grid-template-columns:repeat(2,1fr)}.number-list{grid-template-columns:repeat(2,1fr)}.three-grid,.role-grid,.step-grid,.discover-grid{grid-template-columns:1fr}.meter-grid{grid-template-columns:repeat(2,1fr)}.footer-top{grid-template-columns:1fr}.article-grid{grid-template-columns:1fr}.side-card{position:static}.service-card{grid-template-columns:1fr}.split-card{grid-template-columns:1fr}.footer-groups{grid-template-columns:repeat(2,1fr)}.mosaic-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:700px){.wrap{width:min(calc(100% - 32px),var(--max))}.tab-bar{display:none}main{padding-top:92px;padding-bottom:64px}.page-shell{padding-top:24px}.status-bar{height:32px}.command-bar{height:60px}.command-inner{grid-template-columns:44px 1fr 92px}.command-logo{justify-self:center}.app-entry{justify-self:end;padding:0 13px;font-size:14px;white-space:nowrap}.hero-card{padding:24px 20px}.topic-grid,.quad-grid,.contact-grid,.footer-groups{grid-template-columns:1fr}.number-list{grid-template-columns:1fr}.meter-grid{grid-template-columns:1fr}.file-row{grid-template-columns:auto 1fr}.file-row .text-link{grid-column:2}.long-strip{grid-template-columns:48px 1fr}.long-strip .text-link{grid-column:2}.mosaic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.mosaic-grid section{padding:14px}.mosaic-grid a span{font-size:12px}.mosaic-head{height:74px}.search-panel{top:0;bottom:0;background:var(--bg);overflow:auto}.search-card{width:100%;min-height:100%;margin:0;border:0;border-radius:0;box-shadow:none;padding:24px 16px}.mobile-bottom{position:fixed;z-index:190;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:50px;font-size:13px;color:var(--muted)}.mobile-bottom a.is-current{color:var(--blue);font-weight:800}.site-footer{padding-bottom:calc(80px + env(safe-area-inset-bottom))}.media-placeholder{min-height:170px}.footer-brand{justify-content:flex-start}}