:root{--graph-ink:#18392a;--graph-muted:#68756d;--graph-line:#dfe7e1;--graph-soft:#f1f6f2;--graph-accent:#286341}
[hidden]{display:none!important}.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}
.guided-graph{color:var(--graph-ink);background:#f7f9f6;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
.graph-shell{max-width:1600px;margin:0 auto;padding:22px 28px 36px}.graph-topbar,.scope-strip,.graph-stage,.detail-panel,.detail-card{border:0;box-shadow:none;backdrop-filter:none;background:transparent}
.graph-topbar{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:0 0 18px;padding:0}.graph-topbar h1{margin:1px 0 0;font-size:clamp(28px,3vw,38px);line-height:1.25;color:var(--graph-ink)}
.eyebrow{margin:0;color:var(--graph-accent);font-size:13px;letter-spacing:.04em;text-transform:none}.return-course{display:inline-flex;align-items:center;min-height:42px;padding:8px 14px;border:1px solid var(--graph-line);border-radius:9px;color:var(--graph-accent);background:#fff;text-decoration:none;font-size:14px;font-weight:650}
.scope-strip{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:16px;margin:0 0 16px;padding:11px 12px;border:1px solid var(--graph-line);border-radius:12px;background:#fff}
.scope-tabs{display:flex;gap:4px;min-width:0;overflow-x:auto;scrollbar-width:none}.scope-tabs::-webkit-scrollbar{display:none}.scope-button{flex:0 0 auto;min-height:38px;padding:7px 11px;border:0;border-radius:8px;background:transparent;color:var(--graph-muted);font-size:14px;white-space:nowrap}.scope-button:hover{transform:none;box-shadow:none;background:var(--graph-soft)}.scope-button.active{background:var(--graph-soft);color:var(--graph-accent);font-weight:700}
.graph-search{display:grid;grid-template-columns:minmax(120px,190px) auto;gap:7px;width:auto;margin:0}.graph-search input{width:100%;min-height:38px;padding:7px 11px;border:1px solid var(--graph-line);border-radius:8px;background:#fbfcfb;font-size:14px}.graph-search button{min-height:38px;padding:7px 11px;border:0;border-radius:8px;background:var(--graph-accent);color:#fff;font-size:14px}.graph-search span{grid-column:1/-1;font-size:12px;color:#8a5a31}
.graph-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(330px,390px);gap:16px;align-items:start}.graph-stage{min-width:0;padding:16px;border:1px solid var(--graph-line);border-radius:14px;background:#fff}.stage-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 0 8px}.stage-head h2{margin:0;font-size:20px}.stage-note{margin:3px 0 0;max-width:none;color:var(--graph-muted);font-size:13px;line-height:1.5;text-align:left}
.canvas-actions{display:flex;gap:6px;flex-wrap:nowrap}.action-button{min-height:38px;padding:7px 11px;border:1px solid var(--graph-line);border-radius:8px;background:#fff;color:var(--graph-muted);font-size:13px;white-space:nowrap}.action-button:hover{transform:none;box-shadow:none;border-color:#b8cbbd;color:var(--graph-accent)}.action-button[aria-pressed="false"]{background:var(--graph-soft);color:var(--graph-accent)}.action-button:disabled{cursor:default;opacity:.48}
.network-key{display:flex;align-items:center;gap:14px;margin:0 0 8px;color:var(--graph-muted);font-size:12px}.network-key span{display:inline-flex;align-items:center;gap:5px}.network-key span::before{content:"";display:block;width:9px;height:9px;border:2px solid #527462;border-radius:50%}.network-key .key-course::before{background:#173f2c;border-color:#173f2c}.network-key .key-unit::before{background:#edf5ef}.network-key .key-point::before{border-radius:3px;background:#edf5ef}.network-key .key-concept::before{border-radius:3px;background:#fff}
.graph-canvas-shell{min-height:1100px;height:1100px;border:0;border-radius:11px;background:#fbfcfb;overflow:hidden}.guided-graph .graph-canvas-shell,.guided-graph #graph-svg,#graph-svg{min-height:1100px;height:1100px}.graph-loading{inset:0;border-radius:11px;background:rgba(247,249,246,.92);color:var(--graph-muted)}
.sector-field,.orbit-guide{pointer-events:none}.orbit-guide{fill:none;stroke:#dce6df;stroke-width:2px;stroke-dasharray:7 18}.graph-node-shape{stroke-width:4px}.graph-node{cursor:pointer}.graph-node.active .graph-node-shape{stroke-width:8px;filter:drop-shadow(0 12px 18px rgba(25,64,43,.18))}.graph-node.dimmed{opacity:.24}.graph-node-label{fill:var(--graph-ink);font-size:44px;font-weight:700}.course-root .graph-node-label{fill:#fff;font-size:64px}.unit-node .graph-node-label{font-size:54px}.point-node .graph-node-label{font-size:54px}.concept-node .graph-node-label{font-size:44px}.extension-node .graph-node-label{font-size:40px;font-weight:650}.graph-edge{stroke:rgba(40,99,65,.24);stroke-width:5px}.level-course .graph-edge{stroke:rgba(23,63,44,.5);stroke-width:8px}.level-point .graph-edge{stroke-width:6px}.level-concept .graph-edge{stroke:rgba(40,99,65,.3)}.level-extension .graph-edge{stroke-dasharray:14 18;stroke:rgba(40,99,65,.28)}.edge-hit{stroke:transparent;stroke-width:30px}.edge-wrap.active .graph-edge{opacity:1;stroke-width:9px}.edge-wrap.dimmed{opacity:.05}
.relation-inspector{min-height:48px;margin:10px 0 0;padding:11px 13px;border:0;border-radius:9px;background:var(--graph-soft);color:var(--graph-muted);font-size:13px}.relation-inspector h3{margin:0 0 3px;color:var(--graph-ink);font-size:14px}.relation-inspector p{margin:0;line-height:1.55}.relation-endpoints,.relation-inspector details{display:none}.relation-experiment{display:none!important}
.detail-panel{position:sticky;top:16px;max-height:calc(100vh - 32px);padding:16px;border:1px solid var(--graph-line);border-radius:14px;background:#fff;overflow:hidden}.detail-header{display:flex;align-items:center;justify-content:space-between;padding:0 2px 11px;border-bottom:1px solid var(--graph-line)}.drawer-toggle{display:none}.detail-body{display:grid;gap:0;margin:0;max-height:calc(100vh - 92px);overflow-y:auto;scrollbar-width:thin}.detail-card{padding:17px 7px 17px 2px;border-radius:0}.detail-card+.detail-card{border-top:1px solid var(--graph-line)}
.detail-summary-title,.detail-card h2{margin:0 0 9px;color:var(--graph-ink);font-size:23px;line-height:1.35}.detail-card h3{margin:0;font-size:15px}.detail-card p{margin:0;color:var(--graph-muted);font-size:15px;line-height:1.7}.detail-meta{margin-top:9px!important;font-size:12px!important;color:var(--graph-accent)!important}.detail-alias,.detail-source{display:none}.detail-actions{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:16px}.detail-action{min-height:40px;padding:8px 10px;border:1px solid var(--graph-line);border-radius:8px;color:var(--graph-accent);background:#fff;text-align:center;font-size:13px;text-decoration:none}.detail-action:last-child{border-color:var(--graph-accent);background:var(--graph-accent);color:#fff}
.detail-section-title{margin:20px 0 7px!important;font-size:15px!important;color:var(--graph-ink)!important}.detail-question{margin-bottom:12px!important;padding:10px 12px;border-left:3px solid var(--graph-accent);background:var(--graph-soft);color:var(--graph-ink)!important;font-weight:650}.detail-list{margin:7px 0 0;padding-left:20px;color:var(--graph-muted);font-size:14px;line-height:1.7}.detail-list li+li{margin-top:5px}.detail-stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin:16px 0}.detail-stat-grid span{padding:10px 6px;border-radius:8px;background:var(--graph-soft);color:var(--graph-muted);font-size:11px;text-align:center}.detail-stat-grid strong{display:block;color:var(--graph-ink);font-size:20px}.detail-callout,.detail-reading{margin-top:12px;padding:11px 12px;border-radius:8px;background:#fff7ef;color:#754a28;font-size:13px}.detail-callout.design{background:#eef6f0;color:#285a3b}.detail-callout p,.detail-reading p{margin-top:4px;font-size:13px;line-height:1.6}.detail-source-line{margin-top:16px!important;padding-top:12px;border-top:1px solid var(--graph-line);font-size:12px!important}.detail-card-head{margin-bottom:10px}.count-badge{min-width:26px;padding:2px 7px;background:var(--graph-soft);font-size:12px}.neighbor-list{display:grid;gap:5px}.neighbor-button{min-height:42px;padding:9px 10px;border:0;border-radius:8px;background:#f7f9f7;color:var(--graph-ink);text-align:left}.neighbor-button:hover{transform:none;box-shadow:none;background:var(--graph-soft)}.neighbor-button strong{display:block;margin:0;font-size:14px}.neighbor-button small{display:block;margin-top:3px;color:var(--graph-muted);font-size:12px;line-height:1.45}
button:focus-visible,a:focus-visible,input:focus-visible,.graph-node:focus-visible{outline:3px solid #8fb59a;outline-offset:2px}
@media(max-width:1050px){.graph-layout{grid-template-columns:1fr}.detail-panel{position:static;max-height:none}.detail-body{max-height:none}.drawer-toggle{display:inline-flex;min-height:36px;padding:6px 10px;border:1px solid var(--graph-line);border-radius:8px;background:#fff}.detail-panel.collapsed .detail-body{display:none}}
@media(max-width:700px){.graph-shell{padding:16px 12px 88px}.graph-topbar{align-items:center}.graph-topbar h1{font-size:27px}.return-course{min-height:38px;padding:7px 10px;font-size:13px}.scope-strip{grid-template-columns:1fr;padding:9px}.scope-button{font-size:13px}.graph-search{grid-template-columns:1fr auto}.stage-head{align-items:flex-start;flex-direction:column}.canvas-actions{width:100%;overflow-x:auto}.action-button{flex:0 0 auto}.network-key{gap:9px;overflow-x:auto;white-space:nowrap}.graph-stage{padding:11px}.graph-canvas-shell,.guided-graph .graph-canvas-shell,.guided-graph #graph-svg,#graph-svg{min-height:920px;height:920px}.detail-panel{padding:14px}.detail-summary-title,.detail-card h2{font-size:21px}.detail-actions{grid-template-columns:1fr}.relation-inspector{font-size:12px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}