:root{
  --bg:#F3F7FB;--deep:#E6EFF7;--surface:#FFFFFF;--sub:#DCEBF5;--ink:#10263A;--text:#263B4C;--muted:#60788C;--soft:#8094A5;
  --brand:#3B9FE0;--bright:#67B9EC;--steel:#1E6FB8;--ice:#B8DDF3;--mint:#39A69C;--border:rgba(30,111,184,.16);--border-strong:rgba(59,159,224,.38);--shadow:0 14px 36px rgba(16,38,58,.08);
  --radius:14px;--max:1240px;--top:72px
}
*{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:17px;line-height:1.82;overflow-x:hidden}body.layer-open{overflow:hidden}a{color:var(--steel);text-decoration:none}a:hover{text-decoration:none;color:#155f9f}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(59,159,224,.34);outline-offset:3px}img{display:block;max-width:100%;height:auto}.skip-link{position:fixed;left:16px;top:-80px;z-index:2000;background:#fff;padding:10px 14px;border-radius:8px;box-shadow:var(--shadow)}.skip-link:focus{top:12px}
.topbar{position:sticky;top:0;z-index:900;height:var(--top);background:rgba(243,247,251,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);box-shadow:0 8px 24px rgba(16,38,58,.05)}.topbar-inner{max-width:var(--max);height:100%;margin:0 auto;padding:0 22px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand-link{display:flex;align-items:center;gap:13px;min-width:0;color:var(--ink)}.brand-logo{height:34px;width:auto;max-width:180px;object-fit:contain}.brand-text{font-size:21px;font-weight:800;letter-spacing:.02em}.brand-state{font-size:14px;color:var(--muted);white-space:nowrap}.top-actions{display:flex;align-items:center;gap:8px}.icon-action,.rail-all,.close-button,.demo-button{min-height:44px;border:1px solid var(--border);background:#fff;color:var(--steel);border-radius:10px;padding:0 15px;font:inherit;font-weight:700;cursor:pointer}.icon-action:hover,.rail-all:hover,.close-button:hover,.demo-button:hover{background:var(--deep)}.app-link,.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:10px;font-weight:800}.app-link,.primary-button{background:linear-gradient(135deg,#67B9EC 0%,#3B9FE0 52%,#1E6FB8 100%);color:#fff}.app-link:hover,.primary-button:hover{color:#fff;filter:brightness(.98)}.secondary-button{background:#fff;color:var(--steel);border:1px solid var(--border-strong)}
.site-main{min-height:60vh}.page-shell{max-width:var(--max);margin:0 auto;padding:28px 22px 72px;display:grid;grid-template-columns:220px minmax(0,1fr);gap:34px;align-items:start}.content-column{min-width:0}.desktop-rail{position:sticky;top:calc(var(--top) + 24px);align-self:start;background:rgba(255,255,255,.8);border:1px solid var(--border);border-radius:16px;padding:16px;box-shadow:0 10px 28px rgba(16,38,58,.05)}.rail-group+.rail-group{margin-top:18px}.rail-group h2{font-size:13px;color:var(--soft);letter-spacing:.08em;margin:0 0 8px}.rail-link{display:block;padding:9px 10px 9px 12px;border-left:3px solid transparent;border-radius:0 10px 10px 0;color:var(--text)}.rail-link strong{display:block;font-size:15px;color:var(--ink);line-height:1.35}.rail-link span{display:block;margin-top:3px;font-size:12px;line-height:1.5;color:var(--muted)}.rail-link.is-current{border-left-color:var(--steel);background:#e9f4fb}.rail-all{width:100%;margin-top:16px;font-size:14px}
.breadcrumb{font-size:14px;color:var(--muted);margin:4px 0 18px}.breadcrumb a{color:var(--muted)}.hero-copy{padding:6px 0 20px}.eyebrow{display:inline-block;color:var(--steel);font-size:13px;font-weight:800;letter-spacing:.08em;margin-bottom:8px}.hero-copy h1,.page-hero h1{font-size:clamp(30px,4vw,38px);line-height:1.2;color:var(--ink);margin:0 0 16px;letter-spacing:-.02em}.hero-copy p,.page-hero p{font-size:18px;max-width:850px;color:var(--muted);margin:0}.page-hero{background:linear-gradient(135deg,#fff,#eef7fc);border:1px solid var(--border);border-radius:16px;padding:30px;box-shadow:var(--shadow);margin-bottom:26px}.hero-actions,.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.media-frame{margin:0;background:#eef6fb;border:1px solid var(--border);border-radius:16px;overflow:hidden;display:flex;align-items:center;justify-content:center;min-height:180px}.media-frame img{width:100%;height:100%;object-fit:contain;object-position:center}.hero-media{max-height:420px}.hero-media img{max-height:420px}.wide-media{max-height:360px}.wide-media img{max-height:360px}.portrait-media{aspect-ratio:4/5;max-height:460px}.icon-media{aspect-ratio:1/1;max-width:80px;min-height:auto}.media-fallback{background:linear-gradient(145deg,#e7f3fb,#dcecf6);color:var(--steel);font-weight:800;letter-spacing:.04em;padding:24px;text-align:center;aspect-ratio:16/9}.portrait-media.media-fallback{aspect-ratio:4/5}.icon-media.media-fallback{aspect-ratio:1/1;padding:8px}
.section{margin:34px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:18px}.section-head h2,.section h2{font-size:clamp(22px,3vw,28px);line-height:1.3;color:var(--ink);margin:0 0 10px}.section-head p{margin:0;color:var(--muted);max-width:680px}.section p{margin:0 0 14px}.section p:last-child{margin-bottom:0}.card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px;box-shadow:0 8px 24px rgba(16,38,58,.04)}.card h3{margin:0 0 8px;font-size:19px;color:var(--ink)}.card p{font-size:16px;color:var(--text)}.grid-2,.grid-3,.grid-4{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.task-card{display:flex;flex-direction:column;justify-content:space-between;min-height:170px}.task-card .num{font-size:13px;color:var(--steel);font-weight:800}.task-card a{font-weight:800;margin-top:12px}.task-card.with-media{padding:0;overflow:hidden}.task-card.with-media .task-copy{padding:18px}.task-thumb{border:0;border-radius:0;min-height:130px}.task-thumb img{max-height:180px}
.reading-board{display:grid;grid-template-columns:1.5fr .9fr;grid-template-rows:auto auto;gap:18px}.reading-board .feature{grid-row:1/3}.reading-board .card{min-height:100%}.feature .media-frame{margin-bottom:18px}.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.tag{display:inline-flex;align-items:center;min-height:32px;padding:0 10px;border-radius:8px;background:var(--deep);color:var(--steel);font-size:13px;font-weight:700}.channel-strip{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:24px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px;margin-bottom:18px}.channel-strip.is-reverse .media-wrap{order:2}.channel-strip h3{font-size:24px;color:var(--ink);margin:0 0 10px}.channel-strip p{margin:0}.channel-strip .media-frame{max-height:260px}.text-nodes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:18px}.node{padding:18px;border-top:3px solid var(--brand);background:#fff;border-radius:0 0 12px 12px}.node strong{color:var(--ink)}
.mosaic{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}.mosaic article{min-height:150px;border-radius:14px;padding:22px;background:#fff;border:1px solid var(--border)}.mosaic article:nth-child(1),.mosaic article:nth-child(4){grid-column:span 7}.mosaic article:nth-child(2),.mosaic article:nth-child(3){grid-column:span 5}.mosaic article:nth-child(5),.mosaic article:nth-child(6){grid-column:span 6}.mosaic .index{font-size:13px;font-weight:800;color:var(--steel)}.mosaic h3{margin:10px 0 6px;color:var(--ink)}
.split-collection{display:grid;grid-template-columns:1.12fr .88fr;gap:20px}.shelf-box{background:#fff;border:1px solid var(--border);border-radius:16px;overflow:hidden}.shelf-box .media-frame{border:0;border-bottom:1px solid var(--border);border-radius:0}.shelf-level{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0}.shelf-level div{padding:17px;border-right:1px solid var(--border);border-bottom:1px solid var(--border)}.shelf-level div:nth-child(2n){border-right:0}.list-panel{background:var(--deep);border:1px solid var(--border);border-radius:16px;padding:22px}.number-list{list-style:none;margin:0;padding:0}.number-list li{display:grid;grid-template-columns:42px 1fr;gap:12px;padding:14px 0;border-bottom:1px solid var(--border)}.number-list li:last-child{border-bottom:0}.number-list b{color:var(--steel)}
.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.tool-item{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px}.tool-item h3{margin:0 0 8px;color:var(--ink)}.demo-sample{margin-top:16px;background:var(--deep);border-radius:12px;padding:18px;transition:.2s ease}.demo-sample.is-compact{font-size:15px;line-height:1.5;padding:12px}.demo-button{margin-top:12px}
.app-showcase{display:grid;grid-template-columns:minmax(240px,.75fr) minmax(0,1.25fr);gap:26px;align-items:center}.app-visuals{display:grid;grid-template-columns:1fr 80px;gap:14px;align-items:end}.check-list{margin:16px 0 0;padding:0;list-style:none}.check-list li{padding:10px 0 10px 28px;border-bottom:1px solid var(--border);position:relative}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--mint);font-weight:900}
.boundary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.boundary-grid article{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px}.boundary-grid h3{margin:0 0 9px;color:var(--ink)}.related-links{margin-top:34px;background:var(--deep);border:1px solid var(--border);border-radius:16px;padding:22px}.related-links h2{font-size:22px}.related-links .link-row{display:flex;flex-wrap:wrap;gap:10px}.related-links a{background:#fff;border:1px solid var(--border);border-radius:10px;padding:10px 13px;font-weight:700}.page-cta{margin:34px 0 8px;background:linear-gradient(135deg,#eef7fc,#dcecf6);border:1px solid var(--border);border-radius:16px;padding:24px}.page-cta h2{margin-top:0}
.steps{counter-reset:step;display:grid;gap:16px}.step{position:relative;background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px 22px 22px 74px}.step:before{counter-increment:step;content:counter(step,decimal-leading-zero);position:absolute;left:20px;top:20px;color:var(--steel);font-weight:900;font-size:18px}.step h3{margin:0 0 8px;color:var(--ink)}.editor-board{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.editor-board .stack{display:grid;gap:18px}.profile-index,.compact-directory,.chapter-book,.kanban,.terms-grid,.help-grid{display:grid;gap:16px}.profile-index{grid-template-columns:repeat(2,minmax(0,1fr))}.profile-item{background:#fff;border-left:4px solid var(--brand);border-radius:0 14px 14px 0;padding:22px}.profile-item h3{margin-top:0}.compact-directory{grid-template-columns:repeat(3,minmax(0,1fr))}.compact-directory .card{padding:18px}.chapter-book{counter-reset:chapter}.chapter{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px}.chapter h3:before{counter-increment:chapter;content:"第" counter(chapter) "章 · ";color:var(--steel)}.flow-seven{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:10px}.flow-seven article{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px 12px}.flow-seven b{display:block;color:var(--steel);font-size:13px;margin-bottom:6px}.flow-seven h3{font-size:17px;margin:0 0 8px}.magazine-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}.magazine-grid article{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px;grid-column:span 2}.magazine-grid article:nth-child(1),.magazine-grid article:nth-child(4){grid-column:span 3}.shelf-layout{display:grid;gap:14px}.shelf-row{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px;display:grid;grid-template-columns:170px 1fr;gap:20px}.shelf-row strong{color:var(--ink)}.editor-numbered{list-style:none;padding:0;margin:0}.editor-numbered li{display:grid;grid-template-columns:64px 1fr;gap:18px;padding:22px 0;border-bottom:1px solid var(--border)}.editor-numbered .n{font-size:28px;color:var(--steel);font-weight:900}.kanban{grid-template-columns:repeat(5,minmax(0,1fr));align-items:start}.kanban-col{background:#fff;border:1px solid var(--border);border-radius:14px;padding:16px}.kanban-col h3{font-size:17px;margin:0 0 10px}.kanban-col p{font-size:15px}.article-prose{background:#fff;border:1px solid var(--border);border-radius:16px;padding:30px}.article-prose h2{margin-top:28px}.article-prose h2:first-child{margin-top:0}.editor-note{border-left:4px solid var(--mint);background:#eef8f6;padding:18px 20px;margin:20px 0;border-radius:0 12px 12px 0}.theme-map{display:grid;grid-template-columns:1fr 1.5fr 1fr;gap:16px;align-items:stretch}.map-stop{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px;position:relative}.map-stop.center{background:var(--deep)}.map-stop h3{margin-top:0}.checklist{list-style:none;padding:0;margin:0;display:grid;gap:12px}.checklist li{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px 18px}.checklist strong{display:block;color:var(--ink);margin-bottom:4px}.terms-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.summary-card{background:var(--deep);border:1px solid var(--border);border-radius:14px;padding:20px}.summary-card h3{margin-top:0}.help-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.faq-list details{background:#fff;border:1px solid var(--border);border-radius:12px;padding:0 18px;margin-bottom:12px}.faq-list summary{cursor:pointer;min-height:54px;display:flex;align-items:center;font-weight:800;color:var(--ink)}.faq-list details p{padding:0 0 18px;margin:0}.feedback-types{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.feedback-types article{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px}
.overlay{position:fixed;inset:0;z-index:1100;background:rgba(10,32,50,.42)}.search-dialog,.all-menu{position:fixed;z-index:1200;visibility:hidden;opacity:0;pointer-events:none;transition:opacity .18s ease,transform .18s ease}.search-dialog.is-open,.all-menu.is-open{visibility:visible;opacity:1;pointer-events:auto}.search-dialog{left:50%;top:50%;transform:translate(-50%,-46%);width:min(640px,calc(100% - 32px));max-height:82vh;overflow:auto;background:#fff;border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:0 28px 80px rgba(16,38,58,.25)}.search-dialog.is-open{transform:translate(-50%,-50%)}.dialog-head,.menu-panel-head{display:flex;align-items:center;justify-content:space-between;gap:18px}.dialog-head small,.menu-brand small{color:var(--muted)}.dialog-head h2,.menu-panel-head h2{margin:2px 0 0;color:var(--ink)}.search-label{display:block;margin:18px 0 8px;color:var(--muted);font-size:14px}.search-input{width:100%;min-height:50px;border:1px solid var(--border-strong);border-radius:10px;padding:0 14px;font:inherit;color:var(--ink);background:#fafdff}.search-results{display:grid;gap:8px;margin-top:14px}.search-results a{display:flex;justify-content:space-between;gap:16px;padding:12px;border-radius:10px;background:var(--bg);font-weight:800}.search-results a span{font-weight:400;color:var(--muted);font-size:14px}.empty-result{padding:14px;margin:0;background:var(--deep);border-radius:10px;color:var(--muted)}.all-menu{left:50%;bottom:18px;transform:translate(-50%,24px);width:min(980px,calc(100% - 32px));max-height:82vh;overflow:auto;background:#fff;border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:0 28px 80px rgba(16,38,58,.25)}.all-menu.is-open{transform:translate(-50%,0)}.menu-brand{display:flex;align-items:center;gap:12px}.menu-brand img{height:32px;width:auto;max-width:160px}.menu-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:18px}.menu-grid h3{font-size:15px;color:var(--soft);margin:0 0 8px}.menu-grid a{display:block;padding:10px 0;border-bottom:1px solid var(--border);color:var(--text)}.menu-grid a strong{display:block;color:var(--ink)}.menu-grid a span{display:block;font-size:12px;line-height:1.5;color:var(--muted);margin-top:3px}
.site-footer{background:#185b92;color:#eaf5fb;padding:50px 22px 86px}.footer-inner{max-width:var(--max);margin:0 auto}.footer-brand{display:flex;align-items:center;gap:16px;padding-bottom:24px;border-bottom:1px solid rgba(255,255,255,.15)}.footer-logo{height:34px;width:auto;max-width:180px;filter:brightness(0) invert(1)}.footer-brand p{margin:0;line-height:1.45}.footer-brand span{font-size:13px;color:#c7e0f0}.footer-groups{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;margin:28px 0}.footer-groups h2{font-size:15px;margin:0 0 10px;color:#fff}.footer-groups a{display:block;color:#dceef8;font-size:14px;padding:4px 0}.footer-note,.footer-copy{font-size:14px;color:#c9e2f2;margin:10px 0}.mobile-bottom{display:none}
@media(max-width:1100px){.page-shell{grid-template-columns:205px minmax(0,1fr);gap:24px}.flow-seven{grid-template-columns:repeat(4,minmax(0,1fr))}.kanban{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:960px){.page-shell{display:block}.desktop-rail{display:none}.menu-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.compact-directory,.help-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.magazine-grid article{grid-column:span 3}.flow-seven{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:760px){:root{--top:66px}.topbar-inner{padding:0 16px}.brand-state,.app-link{display:none}.brand-logo{height:30px;max-width:150px}.icon-action{padding:0 12px}.page-shell{padding:20px 16px 86px}.page-hero{padding:22px}.page-hero p,.hero-copy p{font-size:16px}.grid-2,.grid-3,.grid-4,.reading-board,.split-collection,.tool-grid,.boundary-grid,.profile-index,.editor-board,.compact-directory,.terms-grid,.help-grid,.feedback-types{grid-template-columns:1fr}.reading-board .feature{grid-row:auto}.channel-strip,.channel-strip.is-reverse{grid-template-columns:1fr;padding:14px}.channel-strip.is-reverse .media-wrap{order:0}.text-nodes{grid-template-columns:1fr}.mosaic{grid-template-columns:1fr}.mosaic article,.mosaic article:nth-child(n){grid-column:auto}.app-showcase{grid-template-columns:1fr}.app-visuals{grid-template-columns:1fr 64px}.shelf-row{grid-template-columns:1fr}.theme-map{grid-template-columns:1fr}.flow-seven{grid-template-columns:1fr 1fr}.magazine-grid{grid-template-columns:1fr}.magazine-grid article,.magazine-grid article:nth-child(n){grid-column:auto}.kanban{grid-template-columns:1fr 1fr}.footer-groups{grid-template-columns:1fr 1fr}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:850;display:grid;grid-template-columns:repeat(5,1fr);min-height:58px;padding-bottom:env(safe-area-inset-bottom);background:rgba(255,255,255,.97);border-top:1px solid var(--border);box-shadow:0 -8px 24px rgba(16,38,58,.08)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-width:0;color:var(--text);font-size:13px;font-weight:800}.mobile-bottom a.is-current{background:var(--steel);color:#fff}.site-footer{padding-bottom:calc(90px + env(safe-area-inset-bottom))}.all-menu{left:0;right:0;bottom:0;transform:translateY(24px);width:100%;max-height:82vh;border-radius:18px 18px 0 0;padding:18px}.all-menu.is-open{transform:translateY(0)}.menu-grid{grid-template-columns:1fr}.search-results a{display:block}.search-results a span{display:block;margin-top:3px}.hero-actions,.cta-actions{display:grid;grid-template-columns:1fr}.primary-button,.secondary-button{width:100%}.hero-media,.hero-media img,.wide-media,.wide-media img{max-height:none}.portrait-media{max-height:none}.section{margin:28px 0}.article-prose{padding:22px}.footer-brand{align-items:flex-start}}
@media(max-width:420px){.top-actions{gap:5px}.icon-action{padding:0 10px;font-size:14px}.brand-logo{max-width:132px}.footer-groups{grid-template-columns:1fr}.flow-seven,.kanban{grid-template-columns:1fr}.app-visuals{grid-template-columns:1fr}.icon-media{max-width:70px}.page-hero{padding:20px}.section-head{display:block}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}