: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);--radius:18px;--max:1180px}*{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}a,button{outline-offset:3px}a:focus-visible,button:focus-visible{outline:3px solid rgba(37,99,235,.35)}img{display:block;max-width:100%;height:auto}.no-scroll{overflow:hidden}.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);height:100%;margin:auto;display:flex;align-items:center;padding:0 20px}.status-inner{justify-content:space-between;font-size:13px;letter-spacing:.04em}.status-brand{font-weight:700}.text-button{border:0;background:transparent;color:#fff;min-width:44px;height:32px;cursor:pointer}.command-bar{height:60px;background:#fff;border-bottom:1px solid var(--line)}.command-inner{justify-content:space-between;gap:16px}.square-button{width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer}.square-button span{width:18px;height:2px;background:var(--ink);border-radius:2px}.brand-lockup{min-width:120px;display:flex;justify-content:center;align-items:center;font-size:22px;color:var(--ink)}.brand-mark{max-height:32px;width:auto}.app-open{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:700}.desktop-tabs{height:44px;background:#fff;border-bottom:1px solid var(--line)}.tab-inner{gap:34px}.tab-inner a{height:44px;display:flex;align-items:center;position:relative;color:var(--muted);font-size:15px;white-space:nowrap}.tab-inner a.is-current{color:var(--blue);font-weight:700}.tab-inner a.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:164px;min-height:70vh}.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}.section{padding:42px 0}.section-tight{padding:26px 0}.hero-card,.panel,.content-card,.topic-item,.wide-card,.article-card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:var(--radius)}.hero-card{padding:42px}.eyebrow{margin:0 0 10px;color:var(--blue);font-weight:800;letter-spacing:.08em;text-transform:uppercase}.hero-card h1,.page-hero h1{font-size:clamp(28px,4vw,32px);line-height:1.25;color:var(--ink);margin:0 0 16px}.lead{max-width:780px;color:var(--muted);margin:0 0 22px}.button-row{display:flex;flex-wrap:wrap;gap:12px}.btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 20px;border-radius:999px;font-weight:700}.btn-primary{color:#fff;background:linear-gradient(135deg,#60A5FA 0%,#2563EB 52%,#1D4ED8 100%)}.btn-secondary{background:#fff;color:var(--blue);border:1px solid var(--blue)}.image-slot{margin-top:28px;min-height:190px;max-height:340px;border-radius:16px;background:linear-gradient(135deg,#E8EEF5,#F8FAFC);overflow:hidden;display:flex;align-items:center;justify-content:center;border:1px solid var(--line)}.image-slot img{width:100%;height:100%;max-height:340px;object-fit:contain}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:18px}.section-head h2{margin:0;color:var(--ink);font-size:24px}.section-head p{margin:0;max-width:700px;color:var(--subtle)}.theme-list{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.topic-item{padding:18px;box-shadow:none}.topic-item strong{display:flex;align-items:center;gap:8px;color:var(--ink)}.topic-item strong:before{content:"";width:8px;height:8px;background:var(--blue);border-radius:50%}.topic-item p{margin:8px 0 12px;color:var(--muted);font-size:14px}.text-link{color:var(--blue);font-weight:700}.number-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.number-card{padding:22px;background:#fff;border:1px solid var(--line);border-radius:16px}.number-card .num,.big-num{font-size:36px;line-height:1;color:var(--blue);font-weight:900}.number-card h3{color:var(--ink);margin:14px 0 8px}.number-card p{margin:0;color:var(--muted)}.three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.content-card{overflow:hidden}.content-card .media-slot{min-height:150px;background:var(--soft);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:center}.content-card .media-slot img{width:100%;height:210px;object-fit:cover}.content-card .body{padding:20px}.content-card h3{margin:0 0 8px;color:var(--ink)}.stack{display:grid;gap:16px}.wide-card{padding:26px;display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:26px;align-items:center}.wide-card.reverse{grid-template-columns:320px minmax(0,1fr)}.wide-card .media-slot{min-height:190px;border-radius:14px;background:var(--soft);overflow:hidden}.wide-card .media-slot img{width:100%;height:230px;object-fit:cover}.wide-card h3{font-size:23px;margin:0 0 8px;color:var(--ink)}.quad-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.mini-card{padding:20px;border:1px solid var(--line);background:#fff;border-radius:16px}.mini-card h3{margin:0 0 8px;color:var(--ink)}.file-list{display:grid;gap:10px}.file-row{display:grid;grid-template-columns:64px 1fr auto;gap:16px;align-items:center;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:14px}.file-row .index{font-weight:900;color:var(--blue)}.file-row h3{margin:0;color:var(--ink);font-size:17px}.file-row p{margin:4px 0 0;color:var(--muted);font-size:14px}.timeline{position:relative;margin-left:10px;padding-left:32px;border-left:2px solid rgba(37,99,235,.22)}.timeline-item{position:relative;padding:0 0 26px}.timeline-item:before{content:"";position:absolute;left:-40px;top:7px;width:14px;height:14px;border:4px solid var(--bg);border-radius:50%;background:var(--blue)}.status{display:inline-flex;padding:4px 9px;border-radius:999px;background:#EEF4FF;color:var(--blue);font-size:12px;font-weight:800}.timeline-item h3{margin:8px 0 6px;color:var(--ink)}.page-hero{padding:18px 0 20px}.page-hero .panel{padding:32px}.page-hero p{margin:0;color:var(--muted);max-width:800px}.article-card{padding:28px;margin-bottom:16px}.article-card h2{margin:0 0 12px;color:var(--ink);font-size:22px}.article-card h3{color:var(--ink);margin:20px 0 8px}.article-card p{margin:0 0 14px}.article-card ul{padding-left:22px}.article-card li{margin:7px 0}.index-strip{display:flex;flex-wrap:wrap;gap:9px;margin:14px 0 0}.index-strip a{padding:8px 12px;border-radius:999px;background:#EEF4FF;color:var(--blue);font-weight:700}.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.step-card{padding:20px;border:1px solid var(--line);background:#fff;border-radius:16px}.step-card b{display:block;color:var(--blue);font-size:26px}.step-card h3{margin:8px 0;color:var(--ink)}.faq-list{display:grid;gap:12px}.faq-item{padding:22px;background:#fff;border:1px solid var(--line);border-radius:16px}.faq-item h2{font-size:18px;margin:0 0 10px;color:var(--ink)}.faq-item p{margin:0;color:var(--muted)}.site-footer{background:#0B1220;color:#D6E4FF;padding:54px 0 74px}.footer-inner{width:min(var(--max),calc(100% - 40px));margin:auto}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:28px}.footer-mark{max-height:34px;width:auto}.footer-brand strong{display:block;color:#fff;font-size:22px}.footer-brand span{display:block;color:#93A8C5;font-size:12px;letter-spacing:.12em}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-groups h2{font-size:14px;color:#fff;margin:0 0 10px}.footer-groups a{display:block;color:#B8C8E2;padding:4px 0}.footer-note,.copyright{color:#8EA2C0;font-size:13px}.footer-note{margin:28px 0 8px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1)}.overlay{position:fixed;z-index:90;inset:0;background:rgba(11,18,32,.42);opacity:0;pointer-events:none;transition:.2s}.overlay.is-active{opacity:1;pointer-events:auto}.mosaic-menu{position:fixed;z-index:100;inset:0;background:#F3F6F9;transform:translateY(-100%);visibility:hidden;pointer-events:none;transition:transform .28s ease,visibility .28s;overflow:auto}.mosaic-menu.is-open{transform:translateY(0);visibility:visible;pointer-events:auto}.mosaic-head{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;padding:16px max(20px,calc((100vw - var(--max))/2));background:rgba(255,255,255,.96);border-bottom:1px solid var(--line)}.mosaic-brand{display:flex;align-items:center;gap:12px;color:var(--ink)}.mosaic-brand img{max-height:30px;width:auto}.close-button{min-height:44px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--blue);cursor:pointer}.mosaic-grid{width:min(var(--max),calc(100% - 40px));margin:28px auto 60px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.mosaic-group{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.mosaic-group h2{margin:0 0 12px;font-size:14px;color:var(--subtle)}.mosaic-group a{display:block;padding:12px;border-radius:12px}.mosaic-group a:hover{background:#EEF4FF}.mosaic-group strong{display:block;color:var(--ink)}.mosaic-group span{display:block;color:var(--muted);font-size:13px;margin-top:2px}.search-layer{position:fixed;z-index:110;left:0;right:0;top:92px;visibility:hidden;pointer-events:none}.search-layer.is-open{visibility:visible;pointer-events:auto}.search-card{width:min(760px,calc(100% - 40px));margin:14px auto;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:0 22px 60px rgba(11,18,32,.22);padding:22px}.search-head{display:flex;justify-content:space-between;align-items:center;color:var(--ink)}.search-look{margin:18px 0;padding:16px;border:1px solid var(--line);border-radius:14px;background:#F8FAFC;color:var(--subtle);display:flex;gap:10px}.search-presets{display:flex;flex-wrap:wrap;gap:9px}.search-presets a{padding:9px 13px;border-radius:999px;background:#EEF4FF;color:var(--blue);font-weight:700}.mobile-bottom{display:none}
@media(max-width:900px){.theme-list{grid-template-columns:repeat(2,1fr)}.number-grid{grid-template-columns:repeat(2,1fr)}.three-grid{grid-template-columns:1fr}.wide-card,.wide-card.reverse{grid-template-columns:1fr}.mosaic-grid{grid-template-columns:repeat(2,1fr)}.footer-groups{grid-template-columns:repeat(2,1fr)}.step-grid{grid-template-columns:1fr 1fr}}
@media(max-width:700px){body{padding-bottom:calc(50px + env(safe-area-inset-bottom))}.desktop-tabs{display:none}.site-main{padding-top:104px}.status-inner,.command-inner{padding:0 16px}.command-inner{gap:8px}.brand-lockup{min-width:0;flex:1}.app-open{padding:0 13px;font-size:14px}.container,.footer-inner{width:calc(100% - 32px)}.section{padding:28px 0}.hero-card{padding:24px}.theme-list,.number-grid,.quad-grid,.footer-groups,.step-grid{grid-template-columns:1fr}.file-row{grid-template-columns:44px 1fr}.file-row .text-link{grid-column:2}.wide-card,.wide-card.reverse{padding:20px}.mosaic-grid{width:calc(100% - 32px);grid-template-columns:repeat(2,1fr);gap:10px}.mosaic-group{padding:10px}.mosaic-group a{padding:10px 8px}.search-layer{top:0;bottom:0;background:#F3F6F9;overflow:auto}.search-card{width:100%;min-height:100%;margin:0;border:0;border-radius:0;box-shadow:none;padding:20px 16px}.mobile-bottom{position:fixed;z-index:70;left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);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(--subtle)}.mobile-bottom a.is-current{color:var(--blue);font-weight:800}.site-footer{padding-bottom:92px}}
@media(max-width:420px){.mosaic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mosaic-group span{font-size:12px}.button-row .btn{width:100%}.section-head{display:block}.section-head p{margin-top:8px}}