/* V5 各科概念 — Obsidian-like orientation without the hairball. */
.v5-concepts-head{align-items:flex-start}.v5-concept-search{position:relative;margin:14px 0;min-width:0}.v5-concept-search label{display:flex;align-items:center;gap:10px;border:1px solid var(--line);background:#fff;border-radius:13px;padding:9px 12px;min-width:0}.v5-concept-search label span{font-size:11px;font-weight:800;color:var(--muted);white-space:nowrap}.v5-concept-search input{border:0;outline:0;min-width:0;flex:1;font:inherit;background:transparent;color:var(--text)}.v5-search-results{position:absolute;left:0;right:0;top:calc(100% + 5px);z-index:40;background:#fff;border:1px solid var(--line);border-radius:13px;box-shadow:0 16px 40px rgba(30,33,55,.14);max-height:360px;overflow:auto}.v5-search-results:empty{display:none}.v5-search-results button{display:block;width:100%;border:0;border-bottom:1px solid #eceef3;background:#fff;text-align:left;padding:10px 12px}.v5-search-results button:last-child{border-bottom:0}.v5-search-results button:hover,.v5-search-results button:focus-visible{background:#f7f6ff;outline:2px solid rgba(102,88,223,.22);outline-offset:-2px}.v5-search-results strong{display:block;font-size:12px}.v5-search-results small{display:block;margin-top:3px;color:var(--muted);font-size:10px}.v5-search-empty{padding:12px;color:var(--muted);font-size:11px}
.v5-concept-grid{display:grid;grid-template-columns:minmax(210px,250px) minmax(420px,1fr) minmax(300px,390px);gap:14px;align-items:start;min-width:0}.v5-concept-grid>*{min-width:0}.v5-concept-outline,.v5-concept-detail{position:sticky;top:78px;max-height:calc(100vh - 96px);overflow:hidden}.v5-concept-outline{display:flex;flex-direction:column}.v5-pane-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;padding:13px 14px;border-bottom:1px solid var(--line);min-width:0}.v5-pane-head>div{min-width:0}.v5-pane-head strong{display:block;font-size:13px}.v5-pane-head small{display:block;font-size:10px;color:var(--muted);margin-top:3px;line-height:1.35;overflow-wrap:anywhere}.v5-outline-scroll{overflow:auto;padding:8px 5px 14px}.v5-outline-row{display:flex;align-items:center;padding-left:calc(var(--depth)*12px);min-width:0}.v5-outline-toggle,.v5-outline-spacer{flex:0 0 26px;width:26px;height:30px}.v5-outline-toggle{border:0;background:transparent;color:#7d8390;border-radius:7px}.v5-outline-toggle:hover{background:#f0f1f5}.v5-outline-node{flex:1;min-width:0;border:0;background:transparent;border-radius:9px;padding:7px 7px;display:grid;grid-template-columns:10px minmax(0,1fr);gap:1px 7px;text-align:left;color:#424753}.v5-outline-node>span:nth-child(2){font-size:11px;font-weight:720;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.v5-outline-node small{grid-column:2;font-size:9px;color:#9297a2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.v5-outline-node:hover{background:#f5f5f8}.v5-outline-node.is-selected{background:#f0efff;color:#4f45bd;box-shadow:inset 2px 0 #6658df}.v5-node-state-dot{width:7px;height:7px;border-radius:50%;margin-top:4px;background:#c7cbd3}.v5-node-state-dot.is-has-mistakes{background:#d46c65}.v5-node-state-dot.is-due{background:#d79d3f}.v5-node-state-dot.is-mastered{background:#4f9a70}
.v5-concept-graph{overflow:hidden;min-width:0}.v5-graph-head{align-items:center}.v5-graph-controls{display:flex;gap:5px;flex-wrap:wrap;justify-content:flex-end;min-width:0}.v5-graph-controls .soft-btn{font-size:10px;min-height:30px;padding:5px 8px}.v5-local-stage{position:relative;min-height:590px;max-width:100%;background-color:#fafafa;background-image:radial-gradient(circle at 1px 1px,rgba(77,83,98,.08) 1px,transparent 0);background-size:21px 21px;overflow:hidden}.v5-local-edges{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.v5-local-edges path{fill:none;stroke:#bbc0ca;stroke-width:.45;vector-effect:non-scaling-stroke}.v5-local-edges text{font:700 2.1px -apple-system,BlinkMacSystemFont,"PingFang TC",sans-serif;fill:#9a9faa;paint-order:stroke;stroke:#fafafa;stroke-width:1.2px}.v5-graph-node{position:absolute;left:var(--x);top:var(--y);transform:translate(-50%,-50%);width:126px;max-width:28%;min-height:64px;border:1px solid #dfe2e8;border-radius:13px;background:#fff;box-shadow:0 5px 16px rgba(42,47,61,.07);padding:8px 9px;text-align:left;color:#414650;display:grid;grid-template-columns:9px minmax(0,1fr);gap:2px 6px;transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}.v5-graph-node strong{font-size:11px;line-height:1.25;grid-column:2;overflow-wrap:anywhere}.v5-graph-node small{font-size:8px;color:#9096a2;grid-column:2}.v5-graph-node .v5-node-state-dot{grid-row:1/3}.v5-graph-node.role-current{width:150px;max-width:32%;min-height:78px;border-width:2px}.v5-graph-node.role-parent{background:#f5f6f8}.v5-graph-node.role-sibling{background:#fbfbfc}.v5-graph-node.role-child{background:#fff}.v5-graph-node.role-cross{border-style:dashed}.v5-graph-node:hover,.v5-graph-node:focus-visible{transform:translate(-50%,-50%) scale(1.025);box-shadow:0 9px 23px rgba(42,47,61,.11);outline:0}.v5-graph-node.is-selected{border-color:#6658df;box-shadow:0 0 0 3px rgba(102,88,223,.12),0 9px 24px rgba(42,47,61,.12);color:#4940aa}.v5-graph-node.is-due{border-color:#e0b65f}.v5-graph-node.is-has-mistakes:not(.is-selected){border-color:#dda29d}.v5-graph-node.is-mastered:not(.is-selected){border-color:#91c1a2}.v5-graph-legend{position:absolute;left:10px;bottom:9px;display:flex;gap:9px;flex-wrap:wrap;padding:5px 7px;border-radius:8px;background:rgba(255,255,255,.88);font-size:8px;color:#858b96}.v5-graph-legend span{display:flex;align-items:center;gap:4px}.v5-graph-legend i{width:7px;height:7px;border-radius:50%;background:#c7cbd3}.v5-graph-legend .is-due{background:#d79d3f}.v5-graph-legend .is-has-mistakes{background:#d46c65}.v5-graph-legend .is-mastered{background:#4f9a70}
.v5-concept-detail{overflow:auto;background:#fff;min-width:0}.v5-detail-head{padding:14px 15px 10px}.v5-detail-head h2{font-size:22px;margin:7px 0 6px;line-height:1.25;overflow-wrap:anywhere}.v5-detail-head p{margin:0;color:#666e7b;font-size:11px;line-height:1.5;overflow-wrap:anywhere}.v5-breadcrumb{display:flex;align-items:center;gap:4px;overflow:auto;scrollbar-width:none;max-width:100%}.v5-breadcrumb button{border:0;background:transparent;padding:0;color:#777e89;font-size:9px;white-space:nowrap}.v5-breadcrumb button:hover{text-decoration:underline}.v5-breadcrumb span{font-size:9px;color:#b2b6bf}.v5-real-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;padding:0 14px 10px}.v5-real-metrics>div{border:1px solid #eceef2;background:#fafbfc;border-radius:11px;padding:9px;min-width:0}.v5-real-metrics strong{display:block;font-size:18px}.v5-real-metrics span{font-size:9px;color:#858b96}.v5-review-meta{display:grid;gap:3px;padding:0 15px 12px;color:#8a909b;font-size:9px;border-bottom:1px solid var(--line)}.v5-detail-section{padding:13px 14px;border-bottom:1px solid var(--line);min-width:0}.v5-detail-section:last-child{border-bottom:0}.v5-section-title{margin-bottom:9px}.v5-section-title h3{font-size:13px;margin:0}.v5-section-title small{font-size:9px;color:#9297a1}.v5-fact-card{border:1px solid #e3e5eb;border-radius:12px;padding:10px 11px;margin-bottom:8px;background:#fff;min-width:0}.v5-fact-top{display:flex;justify-content:space-between;gap:8px;color:#7f8591;font-size:8px;font-weight:800}.v5-fact-card h4{margin:8px 0 10px;font-size:13px;line-height:1.45;overflow-wrap:anywhere}.v5-fact-answer{background:#f1f8f3;border-radius:9px;padding:9px 10px;margin-bottom:9px}.v5-fact-answer span{display:block;font-size:8px;color:#5d8b6c}.v5-fact-answer strong{display:block;font-size:12px;margin-top:3px;color:#326847;line-height:1.45;overflow-wrap:anywhere}.v5-fact-hint{font-size:10px;line-height:1.45;padding:8px 9px;background:#fff8df;border-radius:8px;color:#806a2f;margin-bottom:8px}.v5-fact-actions{display:flex;gap:6px;justify-content:flex-end}.v5-fact-actions button{font-size:10px;min-height:31px}.v5-related-problem{display:block;width:100%;border:1px solid #e8eaf0;border-radius:10px;background:#fff;padding:9px 10px;text-align:left;margin-bottom:6px}.v5-related-problem:hover{background:#fafaff}.v5-related-problem span{display:block;font-size:11px;font-weight:750;overflow-wrap:anywhere}.v5-related-problem small{display:block;color:#8d929c;font-size:9px;margin-top:3px;overflow-wrap:anywhere}.v5-mobile-pane-tabs{display:none}
@media(max-width:1280px){.v5-concept-grid{grid-template-columns:210px minmax(0,1fr) minmax(285px,320px)}.v5-graph-node{width:112px}.v5-graph-node.role-current{width:135px}.v5-local-stage{min-height:560px}}
@media(max-width:1180px){.v5-concept-grid{grid-template-columns:52px minmax(0,1fr) minmax(280px,315px);gap:10px}.v5-concept-outline{overflow:visible}.v5-concept-outline .v5-pane-head,.v5-outline-toggle,.v5-outline-node small,.v5-outline-node>span:nth-child(2){display:none}.v5-outline-row{padding-left:0;justify-content:center}.v5-outline-spacer{display:none}.v5-outline-node{flex:0 0 38px;width:38px;height:38px;display:grid;place-items:center;padding:0}.v5-outline-node .v5-node-state-dot{margin:0}.v5-outline-children{display:block}.v5-outline-scroll{padding:7px 3px}.v5-graph-node{width:105px;max-width:31%}.v5-graph-node.role-current{width:126px;max-width:35%}.v5-local-stage{min-height:540px}}
@media(max-width:900px) and (min-width:701px){.v5-concept-grid{grid-template-columns:48px minmax(0,1fr) minmax(260px,300px);gap:8px}.v5-graph-controls .soft-btn{padding:5px 6px}.v5-detail-head{padding-left:11px;padding-right:11px}.v5-real-metrics{padding-left:10px;padding-right:10px}.v5-detail-section{padding-left:10px;padding-right:10px}}
@media(max-width:700px){.v5-concepts-head p{max-width:92vw}.v5-mobile-pane-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;margin:8px 0 10px;padding:4px;border-radius:11px;background:#eef0f4;position:sticky;top:56px;z-index:22}.v5-mobile-pane-tabs button{border:0;background:transparent;border-radius:8px;padding:8px;font-weight:750;color:#737985}.v5-mobile-pane-tabs button.active{background:#fff;color:#5549cb;box-shadow:0 1px 5px rgba(31,35,50,.09)}.v5-concept-grid{display:block}.v5-concept-grid>[data-ce-pane]{display:none!important;position:static;max-height:none}.v5-concept-grid.is-mobile-outline>[data-ce-pane="outline"],.v5-concept-grid.is-mobile-graph>[data-ce-pane="graph"],.v5-concept-grid.is-mobile-detail>[data-ce-pane="detail"]{display:block!important}.v5-concept-outline .v5-pane-head{display:flex}.v5-concept-outline .v5-outline-node>span:nth-child(2){display:block}.v5-concept-outline .v5-outline-node small{display:block}.v5-concept-outline .v5-outline-toggle{display:block}.v5-concept-outline .v5-outline-row{padding-left:calc(var(--depth)*12px);justify-content:flex-start}.v5-concept-outline .v5-outline-node{flex:1;width:auto;height:auto;display:grid;place-items:initial}.v5-concept-outline .v5-outline-node .v5-node-state-dot{margin-top:4px}.v5-local-stage{min-height:535px;overflow:hidden}.v5-graph-head{display:block}.v5-graph-controls{justify-content:flex-start;margin-top:7px}.v5-graph-node{width:100px;max-width:31%;min-height:58px;padding:7px}.v5-graph-node.role-current{width:120px;max-width:35%}.v5-graph-node strong{font-size:10px}.v5-concept-search{margin:9px 0}.v5-concept-search label span{display:none}.v5-concept-detail{padding-bottom:calc(74px + env(safe-area-inset-bottom))}.v5-real-metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:4px}.v5-real-metrics>div{padding:7px 5px;text-align:center}.v5-real-metrics strong{font-size:15px}.v5-fact-actions button{flex:1;min-height:40px}}
@media(prefers-reduced-motion:reduce){.v5-graph-node{transition:none}}