:root{--bg:#F3F6F9;--surface:#fff;--soft:#E8EEF5;--ink:#0B1220;--text:#1E293B;--muted:#475569;--subtle:#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);--head:136px}
*{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",Arial,sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{width:min(1180px,calc(100% - 32px));margin:0 auto}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:16px;top:-60px;z-index:1200;background:#fff;color:var(--blue);padding:10px 16px;border-radius:12px;box-shadow:var(--shadow)}.skip-link:focus{top:10px}
.site-head{position:fixed;inset:0 0 auto;z-index:900}.status-bar{height:32px;background:var(--slate);color:#fff}.status-inner{height:32px;display:flex;align-items:center;justify-content:space-between;gap:16px}.status-brand{font-size:13px;font-weight:800;letter-spacing:.04em}.text-tool{height:32px;border:0;background:transparent;color:#fff;padding:0 8px;cursor:pointer}.command-bar{height:60px;background:#fff;border-bottom:1px solid var(--line)}.command-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.square-tool{width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);display:grid;place-items:center;cursor:pointer}.command-logo{justify-self:center;display:flex;align-items:center;min-height:44px;font-weight:900;letter-spacing:.04em}.command-logo img{display:block;width:auto;max-width:176px;height:32px;object-fit:contain}.app-link{justify-self:end;min-height:44px;display:inline-flex;align-items:center;padding:0 18px;border-radius:999px;background:linear-gradient(135deg,#60A5FA 0%,#2563EB 52%,#1D4ED8 100%);color:#fff;font-weight:800}.tab-bar{height:44px;background:#fff;border-bottom:1px solid var(--line)}.tab-inner{height:44px;display:grid;grid-template-columns:repeat(6,1fr)}.tab-inner a{display:grid;place-items:center;color:var(--muted);font-weight:700;position:relative}.tab-inner a.is-active{color:var(--blue)}.tab-inner a.is-active:after{content:"";position:absolute;left:20%;right:20%;bottom:0;height:3px;border-radius:3px 3px 0 0;background:var(--blue)}
.site-main{padding-top:calc(var(--head) + 28px);min-height:70vh}.hero,.page-hero{margin-bottom:28px}.hero-card{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);overflow:hidden}.hero-copy{padding:34px 34px 24px}.eyebrow,.section-kicker{margin:0 0 8px;color:var(--blue);font-size:13px;font-weight:900;letter-spacing:.1em}.hero h1,.page-hero h1{margin:0;color:var(--ink);font-size:clamp(28px,4vw,32px);line-height:1.25;letter-spacing:-.03em}.lead{max-width:860px;margin:14px 0 0;color:var(--muted);font-size:17px}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 20px;border-radius:999px;font-weight:800}.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,.34)}.media-slot{background:linear-gradient(135deg,#eaf0f7,#f7f9fc);min-height:170px;display:grid;place-items:center;border-top:1px solid var(--line);overflow:hidden}.media-slot img{display:block;width:100%;max-height:340px;object-fit:contain;background:#fff}
.section{margin:26px auto}.section-head{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:14px}.section-head h2{margin:0;color:var(--ink);font-size:24px;line-height:1.3}.section-head p{margin:0;max-width:640px;color:var(--subtle)}.theme-strips{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.theme-strip{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:start}.dot{width:9px;height:9px;margin-top:8px;border-radius:50%;background:var(--blue)}.theme-strip strong{color:var(--ink)}.theme-strip p{margin:3px 0 0;color:var(--muted);font-size:14px}.arrow{color:var(--blue);font-weight:900}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card-grid.two{grid-template-columns:repeat(2,1fr)}.card-grid.four{grid-template-columns:repeat(4,1fr)}.content-card{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 8px 22px rgba(11,18,32,.05);overflow:hidden}.content-card .card-body{padding:20px}.content-card h2,.content-card h3{margin:0 0 8px;color:var(--ink);font-size:19px}.content-card p{margin:0;color:var(--muted)}.content-card .card-link{display:inline-flex;margin-top:14px;color:var(--blue);font-weight:800}.thumb{min-height:150px;background:var(--soft);display:grid;place-items:center;border-bottom:1px solid var(--line);overflow:hidden}.thumb img{width:100%;height:190px;object-fit:cover;display:block}
.number-stack{display:grid;gap:12px}.number-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;display:grid;grid-template-columns:92px 1fr;gap:18px}.number{font-size:42px;line-height:1;font-weight:900;color:var(--blue);letter-spacing:-.04em}.number-item h2,.number-item h3{margin:0 0 6px;color:var(--ink);font-size:20px}.number-item p{margin:0;color:var(--muted)}.feature-band{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.72fr);gap:18px;align-items:stretch}.feature-copy{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px}.feature-copy h2,.feature-copy h3{margin-top:0;color:var(--ink)}.feature-copy p{color:var(--muted)}.feature-media{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;display:grid;place-items:center;min-height:260px}.feature-media img{width:100%;height:100%;max-height:340px;object-fit:cover;display:block}
.file-list{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.file-row{display:grid;grid-template-columns:48px 1fr auto;gap:14px;align-items:center;padding:16px 18px;border-bottom:1px solid var(--line)}.file-row:last-child{border-bottom:0}.file-icon{width:38px;height:38px;border-radius:10px;background:var(--soft);color:var(--blue);display:grid;place-items:center;font-weight:900}.file-row strong{display:block;color:var(--ink)}.file-row small{color:var(--subtle)}.file-row a{color:var(--blue);font-weight:800}.timeline{position:relative;margin-left:12px;padding-left:28px;border-left:2px solid rgba(37,99,235,.22)}.timeline-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;margin:0 0 14px}.timeline-item:before{content:"";position:absolute;left:-36px;top:24px;width:12px;height:12px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px var(--bg)}.timeline-item .status{display:inline-flex;padding:3px 10px;border-radius:999px;background:var(--soft);color:var(--blue);font-size:13px;font-weight:800}.timeline-item h2,.timeline-item h3{margin:8px 0 4px;color:var(--ink);font-size:20px}.timeline-item p{margin:0;color:var(--muted)}
.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:22px}.article-body,.side-card{background:#fff;border:1px solid var(--line);border-radius:18px}.article-body{padding:28px}.article-body h2{margin:30px 0 8px;color:var(--ink);font-size:23px}.article-body h2:first-child{margin-top:0}.article-body p{margin:0 0 16px;color:var(--text)}.side-card{align-self:start;padding:18px;position:sticky;top:158px}.side-card h2{font-size:18px;margin:0 0 8px;color:var(--ink)}.side-card a{display:block;padding:10px 0;border-bottom:1px solid var(--line);color:var(--blue);font-weight:700}.side-card a:last-child{border-bottom:0}.index-list{display:grid;gap:10px}.index-row{display:grid;grid-template-columns:80px 1fr auto;gap:16px;align-items:center;padding:18px;background:#fff;border:1px solid var(--line);border-radius:14px}.index-row .code{font-weight:900;color:var(--blue)}.index-row strong{color:var(--ink)}.index-row p{margin:3px 0 0;color:var(--muted)}.index-row a{color:var(--blue);font-weight:800}.quote-note{border-left:4px solid var(--blue);background:var(--soft);padding:16px 18px;border-radius:0 14px 14px 0;color:var(--text)}.legal-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;margin-bottom:14px}.legal-item h2{margin:0 0 8px;color:var(--ink);font-size:21px}.legal-item p{margin:0;color:var(--muted)}.faq-list{display:grid;gap:12px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.faq-item h2{margin:0 0 8px;color:var(--ink);font-size:19px}.faq-item p{margin:0;color:var(--muted)}.notice{background:#fff;border:1px dashed rgba(37,99,235,.35);border-radius:16px;padding:18px;color:var(--muted)}
.site-footer{margin-top:44px;background:#0B1220;color:#D6E4FF;padding:34px 0 calc(24px + env(safe-area-inset-bottom))}.footer-brand{display:flex;justify-content:space-between;gap:24px;align-items:flex-start;padding-bottom:24px;border-bottom:1px solid rgba(214,228,255,.14)}.footer-brand p{max-width:720px;margin:0;color:#B8C7E0}.footer-logo{display:flex;align-items:center;gap:12px;min-width:max-content}.footer-logo img{width:auto;height:30px;object-fit:contain;filter:brightness(0) invert(1)}.footer-logo span{display:grid;line-height:1.1}.footer-logo strong{color:#fff}.footer-logo small{color:#9FB7D9;margin-top:5px}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;padding:26px 0}.footer-grid h2{margin:0 0 10px;color:#fff;font-size:15px}.footer-grid a{display:block;padding:5px 0;color:#BFD2EF}.footer-bottom{display:flex;justify-content:space-between;gap:18px;padding-top:18px;border-top:1px solid rgba(214,228,255,.14);font-size:14px;color:#AFC3DF}.footer-bottom a{color:#fff}
.layer{position:fixed;inset:0;z-index:1040;visibility:hidden;pointer-events:none;opacity:0;transition:opacity .2s ease,visibility .2s ease}.layer.is-open{visibility:visible;pointer-events:auto;opacity:1}.mosaic-layer{background:rgba(11,18,32,.5);overflow:auto}.mosaic-panel{min-height:100%;background:var(--bg);transform:translateY(-24px);transition:transform .24s ease}.mosaic-layer.is-open .mosaic-panel{transform:translateY(0)}.layer-head{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}.layer-brand{display:flex;align-items:center;gap:12px;color:var(--ink)}.layer-brand img{height:30px;width:auto}.close-tool{min-width:44px;min-height:44px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--blue);font-weight:800;cursor:pointer}.mosaic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding-bottom:42px}.mosaic-grid section{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.mosaic-grid h2{margin:0 0 8px;color:var(--ink);font-size:18px}.mosaic-grid a{display:block;padding:12px 0;border-bottom:1px solid var(--line)}.mosaic-grid a:last-child{border-bottom:0}.mosaic-grid strong{display:block;color:var(--ink)}.mosaic-grid span{display:block;margin-top:2px;color:var(--subtle);font-size:13px;line-height:1.5}.search-layer{background:rgba(11,18,32,.35);padding-top:92px}.search-panel{width:min(780px,calc(100% - 32px));margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:22px}.search-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:12px;color:var(--ink)}.search-panel label{display:block;font-weight:800;color:var(--ink);margin-bottom:8px}.search-panel input{width:100%;height:50px;border:1px solid rgba(37,99,235,.3);border-radius:14px;padding:0 14px;background:#fff;color:var(--ink)}.search-panel p{font-size:13px;color:var(--subtle);margin:8px 0 14px}.search-links{display:flex;flex-wrap:wrap;gap:10px}.search-links a{min-height:44px;display:inline-flex;align-items:center;padding:0 15px;border-radius:999px;background:var(--soft);color:var(--blue);font-weight:800}.page-shade{position:fixed;inset:0;z-index:1030;background:rgba(11,18,32,.25);visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.page-shade.is-open{visibility:visible;pointer-events:auto;opacity:1}.layer-open{overflow:hidden}.mobile-nav{display:none}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(37,99,235,.35);outline-offset:3px}a:hover{color:var(--blue)}.btn-primary:hover,.app-link:hover{color:#fff;filter:brightness(.98)}
@media(max-width:900px){.card-grid.four{grid-template-columns:repeat(2,1fr)}.card-grid{grid-template-columns:1fr 1fr}.article-shell{grid-template-columns:1fr}.side-card{position:static}.feature-band{grid-template-columns:1fr}.mosaic-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){:root{--head:92px}.shell{width:min(100% - 32px,1180px)}.tab-bar{display:none}.site-main{padding-top:calc(var(--head) + 20px)}.command-inner{grid-template-columns:52px 1fr auto;gap:8px}.command-logo img{max-width:140px;height:28px}.app-link{padding:0 13px;font-size:14px}.hero-copy{padding:24px 20px 20px}.lead{font-size:16px}.theme-strips,.card-grid,.card-grid.two,.card-grid.four{grid-template-columns:1fr}.number-item{grid-template-columns:64px 1fr;padding:18px}.number{font-size:34px}.section-head{align-items:flex-start;flex-direction:column}.feature-copy{padding:20px}.article-body{padding:20px}.index-row{grid-template-columns:54px 1fr}.index-row>a{grid-column:2}.footer-brand{flex-direction:column}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-bottom{flex-direction:column}.site-footer{padding-bottom:calc(72px + env(safe-area-inset-bottom))}.mobile-nav{position:fixed;z-index:920;left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(5,1fr)}.mobile-nav a{display:grid;place-items:center;align-content:center;gap:1px;color:var(--subtle)}.mobile-nav a small{font-size:11px;line-height:1.1}.mobile-nav a.is-active{color:var(--blue);font-weight:800}.layer{z-index:1060}.page-shade{z-index:1050}.search-layer{padding-top:0;background:var(--bg)}.search-panel{width:100%;min-height:100%;border:0;border-radius:0;box-shadow:none;padding:calc(20px + env(safe-area-inset-top)) 16px 80px}.mosaic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.mosaic-grid section{padding:14px}.mosaic-grid span{font-size:12px}.layer-head{height:68px}.file-row{grid-template-columns:42px 1fr}.file-row>a{grid-column:2}.thumb img{height:auto;max-height:260px;object-fit:contain}.media-slot{min-height:140px}}
@media(max-width:420px){.command-logo img{max-width:120px}.app-link{padding:0 11px}.number-item{grid-template-columns:48px 1fr}.number{font-size:30px}.hero h1,.page-hero h1{font-size:28px}}