:root{--bg:#F3F6F9;--white:#fff;--ink:#0B1220;--text:#1E293B;--muted:#475569;--aux:#64748B;--blue:#2563EB;--light-blue:#60A5FA;--deep-blue:#1D4ED8;--lime:#65A30D;--slate:#334155;--soft:#E8EEF5;--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-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.72;overflow-x:hidden}body.panel-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.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;background:#fff;box-shadow:0 8px 28px rgba(11,18,32,.05)}.status-bar{height:32px;background:var(--slate);color:#fff}.status-inner,.command-inner,.tab-inner{max-width:var(--max);margin:0 auto;padding:0 16px;height:100%;display:flex;align-items:center}.status-inner{justify-content:space-between;font-size:13px}.text-button,.square-button,.close-button{border:0;background:transparent;cursor:pointer}.text-button{color:#fff;min-width:44px;min-height:32px}.command-bar{height:60px;background:#fff}.command-inner{display:grid;grid-template-columns:1fr auto 1fr;gap:16px}.square-button{justify-self:start;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;color:var(--blue);background:#fff;font-size:20px}.brand-mark{justify-self:center;display:flex;align-items:center;min-height:44px}.brand-mark img{max-height:32px;max-width:180px;object-fit:contain}.brand-mark strong{font-size:20px;letter-spacing:.04em;color:var(--ink)}.app-link{justify-self:end;display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border-radius:999px;background:linear-gradient(135deg,var(--light-blue),var(--blue) 52%,var(--deep-blue));color:#fff;font-weight:700;white-space:nowrap}.desktop-tabs{height:44px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}.tab-inner{gap:30px}.tab-inner a{height:44px;display:inline-flex;align-items:center;position:relative;color:var(--muted);font-weight:700}.tab-inner a.is-active,.tab-inner a:hover{color:var(--blue)}.tab-inner a.is-active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--blue);border-radius:3px}.site-main{max-width:var(--max);margin:0 auto;padding:168px 16px 72px}.hero-card,.inner-hero{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);overflow:hidden}.hero-card{padding:34px}.hero-copy{max-width:760px}.kicker,.eyebrow{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);font-weight:800}.hero-card h1,.inner-hero h1{margin:8px 0 12px;color:var(--ink);font-size:clamp(28px,4vw,32px);line-height:1.22}.hero-card p,.inner-hero p{margin:0;color:var(--muted)}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border-radius:999px;font-weight:800;border:1px solid var(--line);white-space:nowrap}.btn.primary{background:linear-gradient(135deg,var(--light-blue),var(--blue) 52%,var(--deep-blue));color:#fff}.btn.secondary{background:#fff;color:var(--blue)}.media-slot{margin:24px 0 0;background:var(--soft);border-radius:18px;min-height:180px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{display:block;width:100%;max-height:340px;object-fit:contain}.media-placeholder{position:relative}.media-placeholder:before{content:"91 APP";color:var(--blue);font-weight:900;font-size:32px;letter-spacing:.16em;opacity:.18}.section{margin-top:34px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:16px}.section-head h2{margin:0;color:var(--ink);font-size:24px}.section-head p{margin:0;color:var(--aux);max-width:660px}.theme-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.theme-item{padding:18px;background:#fff;border:1px solid var(--line);border-radius:16px;min-height:118px}.theme-item .dot{display:inline-block;width:8px;height:8px;background:var(--blue);border-radius:50%;margin-right:8px}.theme-item strong{color:var(--ink)}.theme-item p{margin:8px 0 0;color:var(--muted);font-size:14px}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.feature-card,.content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 8px 24px rgba(11,18,32,.04)}.feature-card h3,.content-card h2{margin:6px 0 8px;color:var(--ink)}.feature-card p,.content-card p{margin:0;color:var(--muted)}.feature-image,.stack-image{margin:0}.feature-card img{width:100%;height:210px;object-fit:contain;background:var(--soft);border-radius:14px;margin-bottom:14px}.two-stack{display:grid;gap:16px}.stack-card{display:grid;grid-template-columns:240px 1fr;gap:20px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.stack-card img{width:100%;height:180px;object-fit:contain;background:var(--soft);border-radius:14px}.mural-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.mural-tile{min-height:150px;padding:22px;border-radius:18px;background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;justify-content:space-between}.mural-tile span{color:var(--blue);font-size:12px;font-weight:900}.mural-tile strong{font-size:20px;color:var(--ink)}.file-list{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.file-row{display:grid;grid-template-columns:70px 1fr auto;align-items:center;gap:14px;padding:18px 20px;border-bottom:1px solid var(--line)}.file-row:last-child{border-bottom:0}.file-row .num{font-size:26px;font-weight:900;color:var(--blue)}.file-row p{margin:4px 0 0;color:var(--muted)}.meter-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.meter-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.meter-card b{display:block;font-size:40px;color:var(--blue);line-height:1}.meter-card p{color:var(--muted)}.axis-list{position:relative;margin-left:14px;padding-left:28px;border-left:2px solid var(--light-blue)}.axis-node{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:0 0 14px}.axis-node:before{content:"";position:absolute;left:-36px;top:24px;width:12px;height:12px;border-radius:50%;background:var(--blue);border:3px solid var(--bg)}.opinion-list{display:grid;gap:14px}.opinion-card{background:#fff;border-left:4px solid var(--blue);padding:20px;border-radius:0 16px 16px 0}.opinion-card small{color:var(--blue);font-weight:800}.service-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px}.service-grid img{width:100%;max-height:420px;object-fit:contain}.faq-home details,.faq-list details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px}.faq-home,.faq-list{display:grid;gap:12px}.faq-home summary,.faq-list summary{cursor:pointer;font-weight:800;color:var(--ink)}.faq-home p,.faq-list p{color:var(--muted)}.inner-hero{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;padding:28px;align-items:center}.inner-hero .media-slot{margin:0;min-height:220px}.content-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:22px}.content-grid.numbered{grid-template-columns:repeat(3,1fr)}.content-grid.stream{grid-template-columns:1fr}.content-grid.stream .content-card{display:grid;grid-template-columns:60px 180px 1fr;align-items:start;gap:14px}.content-grid.stream .content-card h2{margin-top:0}.content-grid.wide-index{grid-template-columns:repeat(3,1fr)}.content-grid.wide-index .content-card:first-child{grid-column:1/-1}.content-grid.episode{grid-template-columns:1fr}.content-grid.episode .content-card{display:grid;grid-template-columns:70px 180px 1fr;gap:16px;align-items:start}.content-grid.slice{grid-template-columns:repeat(3,1fr)}.content-grid.interview{grid-template-columns:1fr}.content-grid.cards{grid-template-columns:repeat(3,1fr)}.content-grid.mural{grid-template-columns:repeat(2,1fr)}.content-grid.meter{grid-template-columns:repeat(3,1fr)}.content-grid.meter .eyebrow{font-size:34px;line-height:1}.content-grid.steps{grid-template-columns:repeat(3,1fr)}.content-grid.wander{grid-template-columns:repeat(3,1fr)}.content-grid.product{grid-template-columns:repeat(2,1fr)}.content-grid.brand{grid-template-columns:repeat(2,1fr)}.content-grid.meter .content-card:nth-child(n){border-top:3px solid var(--blue)}.content-grid.files,.content-grid.axis,.content-grid.memo,.content-grid.help,.content-grid.contact,.content-grid.terms,.content-grid.guide{grid-template-columns:1fr}.reading-note{margin-top:22px;padding:22px;border-radius:18px;background:var(--soft);border:1px solid var(--line)}.reading-note h2{margin:0 0 6px;color:var(--ink)}.related-links{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:18px}.related-links span{font-weight:800;color:var(--ink)}.related-links a{color:var(--blue);font-weight:700}.site-footer{background:var(--ink);color:#D6E4FF;padding:54px 16px 94px}.footer-inner{max-width:var(--max);margin:auto}.footer-brand{display:flex;gap:18px;align-items:flex-start;padding-bottom:30px;border-bottom:1px solid rgba(214,228,255,.15)}.footer-brand img{max-width:170px;max-height:36px;object-fit:contain}.footer-brand strong{display:block;font-size:24px;color:#fff}.footer-brand span{font-size:12px;letter-spacing:.16em}.footer-brand p{max-width:720px;color:#AFC5EF}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:30px 0}.footer-grid h2{font-size:14px;color:#fff}.footer-grid a{display:block;color:#BFD2F5;margin:8px 0}.footer-note,.copyright{color:#9CB5E3;font-size:13px}.overlay{position:fixed;z-index:100;inset:0;background:rgba(11,18,32,.42);visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.overlay.is-open{visibility:visible;opacity:1;pointer-events:auto}.catalog-panel{position:fixed;z-index:120;inset:0;background:#F7FAFE;visibility:hidden;pointer-events:none;transform:translateY(-100%);transition:transform .25s ease,visibility .25s;overflow-y:auto;padding:24px max(16px,calc((100vw - var(--max))/2 + 16px)) 42px}.catalog-panel.is-open{visibility:visible;pointer-events:auto;transform:translateY(0)}.catalog-head{display:flex;justify-content:space-between;align-items:center;padding-bottom:18px}.catalog-brand{display:flex;align-items:center;gap:12px}.catalog-brand img{max-height:32px;max-width:150px;object-fit:contain}.close-button{min-height:44px;padding:0 18px;border:1px solid var(--line);border-radius:999px;color:var(--blue);background:#fff}.mosaic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.mosaic-grid h2{grid-column:1/-1;margin:18px 0 0;color:var(--ink)}.mosaic-grid a{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;min-height:118px}.mosaic-grid strong{display:block;color:var(--ink);margin-bottom:6px}.mosaic-grid span{color:var(--muted);font-size:14px}.search-layer{position:fixed;z-index:130;left:0;right:0;top:92px;visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.search-layer.is-open{visibility:visible;pointer-events:auto;opacity:1}.search-card{max-width:760px;margin:0 auto;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:22px;padding:22px}.search-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.search-card label{display:block;color:var(--muted);margin-bottom:8px}.search-card input{width:100%;height:48px;border:1px solid var(--line);border-radius:14px;padding:0 14px;outline:none}.search-card input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.12)}.search-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.search-links a{padding:10px 14px;border-radius:999px;background:var(--soft);color:var(--blue);font-weight:700}.mobile-bottom{display:none}.app-badge{max-width:72px;max-height:72px;object-fit:contain;border-radius:16px}.brand-statement{background:var(--ink);color:#DDE8FF;border-radius:22px;padding:30px}.brand-statement h2{color:#fff}.brand-statement a{color:#9CC2FF;font-weight:800}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(37,99,235,.35);outline-offset:3px}@media (max-width:820px){.desktop-tabs{display:none}.site-main{padding-top:114px}.command-inner{grid-template-columns:72px 1fr 92px}.app-link{padding:0 14px}.theme-strip{grid-template-columns:repeat(2,1fr)}.feature-grid,.mural-grid{grid-template-columns:repeat(2,1fr)}.meter-grid{grid-template-columns:repeat(2,1fr)}.inner-hero{grid-template-columns:1fr}.content-grid,.content-grid.numbered,.content-grid.wide-index,.content-grid.slice,.content-grid.cards,.content-grid.mural,.content-grid.meter,.content-grid.steps,.content-grid.wander,.content-grid.product,.content-grid.brand{grid-template-columns:1fr}.content-grid.stream .content-card,.content-grid.episode .content-card{grid-template-columns:1fr}.service-grid{grid-template-columns:1fr}.stack-card{grid-template-columns:1fr}.mosaic-grid{grid-template-columns:repeat(2,1fr)}.search-layer{top:32px;inset-inline:0;bottom:0;background:var(--bg);padding:16px}.search-card{height:100%;border-radius:0;max-width:none}.mobile-bottom{position:fixed;z-index:75;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;min-height:50px;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;font-weight:800;color:var(--muted)}.mobile-bottom a.is-active{background:var(--blue);color:#fff}.site-footer{padding-bottom:120px}}@media (max-width:560px){.status-inner{font-size:12px}.hero-card{padding:24px 18px}.theme-strip,.feature-grid,.mural-grid,.meter-grid{grid-template-columns:1fr}.file-row{grid-template-columns:54px 1fr}.file-row>a{grid-column:2}.footer-grid{grid-template-columns:repeat(2,1fr)}.mosaic-grid a{min-height:108px;padding:14px}.inner-hero{padding:22px 18px}.site-main{padding-inline:16px}.section-head{align-items:start;flex-direction:column}.brand-mark img{max-width:130px}.brand-mark strong{font-size:18px}.catalog-panel{padding-inline:14px}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}