/* 知识图谱页：三栏工作台。左工具，中 SVG，右详情。 */
body.graph-shell { background: var(--ground-2); }
body.graph-shell main { padding-top: 0; }
.kg-wrap { position: relative; padding-top: var(--header-h); height: 100vh; display: grid; grid-template-rows: auto 1fr; }
.kg-head { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 14px clamp(16px, 2vw, 28px) 10px; }
.kg-head h1 { font-size: 22px; letter-spacing: .01em; }
.kg-head .sub { font-size: 12.5px; color: var(--ink-500); margin-top: 2px; }
.kg-head-actions { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }
.kg-head-actions a, .kg-head-actions button { border: 1px solid var(--rule-strong); background: var(--sheet); border-radius: 999px; padding: 7px 13px; font-size: 13px; cursor: pointer; color: var(--ink-700); }
.kg-head-actions a:hover, .kg-head-actions button:hover { border-color: var(--ink-900); color: var(--ink-900); }
.kg-body { display: grid; grid-template-columns: 240px minmax(0, 1fr) 340px; gap: 12px; padding: 0 clamp(12px, 1.5vw, 24px) 16px; min-height: 0; }
.kg-body.no-left { grid-template-columns: minmax(0, 1fr) 340px; }
.kg-body.no-left .kg-left { display: none; }
.kg-panel { background: rgba(255,255,255,.92); border: 1px solid var(--rule); border-radius: var(--radius-md); box-shadow: var(--shadow-1); min-height: 0; overflow: auto; }
.kg-left { padding: 16px; display: grid; gap: 18px; align-content: start; font-size: 13px; }
.kg-left h3 { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-500); font-family: var(--font-mono); margin-bottom: 8px; font-weight: 600; }
.kg-left input { width: 100%; padding: 8px 12px; border-radius: var(--radius-md); border: 1px solid var(--rule-strong); font-size: 13px; background: var(--sheet); }
.kg-left input:focus { outline: 2px solid var(--accent); border-color: transparent; }
.kg-seg { display: inline-flex; border: 1px solid var(--rule-strong); border-radius: 999px; padding: 2px; background: var(--sheet); }
.kg-seg button { border: 0; background: transparent; padding: 5px 12px; border-radius: 999px; font-size: 12.5px; cursor: pointer; color: var(--ink-700); }
.kg-seg button.active { background: var(--ink-900); color: #fff; }
.kg-kinds { display: grid; gap: 4px; }
.kg-kinds label { display: grid; grid-template-columns: auto 18px 1fr auto; align-items: center; gap: 8px; padding: 4px 6px; border-radius: var(--radius-sm); cursor: pointer; color: var(--ink-700); }
.kg-kinds label:hover { background: var(--ground); }
.kg-kinds input { margin: 0; accent-color: var(--ink-900); }
.kg-kinds i { height: 3px; border-radius: 2px; display: block; }
.kg-kinds small { font-family: var(--font-mono); color: var(--ink-500); }
.kg-overview { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; text-align: center; }
.kg-overview b { display: block; font-family: var(--font-mono); font-size: 18px; color: var(--ink-900); }
.kg-overview span { font-size: 10.5px; color: var(--ink-500); }
.kg-units { display: grid; gap: 3px; }
.kg-units button { display: grid; grid-template-columns: 22px 1fr auto; gap: 8px; align-items: center; text-align: left; border: 1px solid transparent; background: transparent; border-radius: var(--radius-md); padding: 5px 7px; font-size: 12.5px; cursor: pointer; color: var(--ink-700); }
.kg-units button:hover { background: var(--ground); }
.kg-units button.active { background: var(--sheet); border-color: var(--rule-strong); color: var(--ink-900); font-weight: 600; }
.kg-units button i { width: 20px; height: 20px; border-radius: 6px; display: grid; place-items: center; color: #fff; font-family: var(--font-mono); font-size: 11px; font-weight: 700; font-style: normal; }
.kg-units button small { font-family: var(--font-mono); color: var(--ink-500); }
.kg-legend { display: grid; gap: 7px; color: var(--ink-700); font-size: 12.5px; }
.kg-legend div { display: flex; align-items: center; gap: 9px; }
.kg-legend i { display: inline-block; flex-shrink: 0; }
.kg-legend i.arc { width: 18px; height: 8px; border-radius: 9px 9px 2px 2px; background: var(--accent); }
.kg-legend i.ring { width: 11px; height: 11px; border-radius: 50%; background: #fff; border: 2px solid var(--accent); }
.kg-legend i.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.kg-legend i.line { width: 18px; height: 2px; background: #4c62b8; }

.kg-stage { position: relative; overflow: hidden; background: radial-gradient(70% 70% at 50% 50%, #ffffff, var(--ground-2) 90%); }
.kg-stage svg { width: 100%; height: 100%; display: block; cursor: grab; touch-action: none; }
.kg-stage svg.dragging { cursor: grabbing; }
.kg-stage .kg-hint { position: absolute; left: 14px; bottom: 12px; font-size: 11.5px; color: var(--ink-500); background: rgba(255,255,255,.85); padding: 5px 9px; border-radius: var(--radius-md); pointer-events: none; }
.kg-stage .kg-zoom { position: absolute; right: 12px; bottom: 12px; display: flex; gap: 4px; }
.kg-zoom button { width: 32px; height: 32px; border-radius: var(--radius-md); border: 1px solid var(--rule-strong); background: var(--sheet); cursor: pointer; font-size: 16px; color: var(--ink-700); }

/* SVG 内的悬停高亮：只改类，不动内联属性，导出时自动回到基础外观 */
svg.hovering .kg-link { transition: stroke-opacity .15s; }
svg.hovering .kg-link:not(.hl) { stroke-opacity: .08 !important; }
svg.hovering .kg-link.hl { stroke-opacity: 1 !important; stroke-width: 2.6; }
svg.hovering .kg-concept:not(.near):not(.selected) { opacity: .28 !important; }
svg.hovering .kg-concept.near .dot { r: 6.5; stroke: #14171c; stroke-width: 2; }
.kg-concept:hover .dot { r: 7; }
.kg-topic:hover ellipse, .kg-topic:hover circle { stroke-width: 3.5; }
.kg-unit:hover path, .kg-unit:hover circle { filter: brightness(1.08); }
.kg-link:hover { stroke-opacity: 1 !important; stroke-width: 2.6; }

/* 右侧详情 */
.kg-right { padding: 18px 18px 22px; display: grid; gap: 12px; align-content: start; font-size: 13.5px; }
.kg-right .kg-kicker { font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-500); font-family: var(--font-mono); font-weight: 600; }
.kg-right h2 { font-size: 22px; line-height: 1.25; }
.kg-right .kg-sub { color: var(--ink-500); font-size: 12.5px; font-family: var(--font-mono); }
.kg-right .kg-desc { line-height: 1.75; color: var(--ink-700); }
.kg-right .kg-path { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; font-size: 12px; color: var(--ink-500); }
.kg-right .kg-path button { border: 0; background: var(--ground); color: var(--ink-700); border-radius: var(--radius-sm); padding: 2px 8px; cursor: pointer; font-size: 12px; box-shadow: inset 3px 0 0 var(--c, transparent); }
.kg-right .kg-section-title { font-size: 11.5px; color: var(--ink-500); letter-spacing: .06em; margin-top: 6px; display: flex; justify-content: space-between; align-items: center; }
.kg-swatch { display: inline-block; width: 12px; height: 3px; border-radius: 2px; margin-right: 6px; vertical-align: middle; }
.code-id { font-family: var(--font-mono); font-size: 11px; color: var(--ink-500); }
.kg-right .kg-empty { color: var(--ink-500); padding: 40px 10px; text-align: center; line-height: 1.75; }
.kg-rel { display: grid; grid-template-columns: 18px 1fr; gap: 8px; padding: 8px 10px; border-radius: var(--radius-md); background: var(--ground); border: 1px solid var(--rule); cursor: pointer; }
.kg-rel:hover { border-color: var(--rule-strong); background: var(--sheet); }
.kg-rel .dir { font-family: var(--font-mono); color: var(--ink-500); }
.kg-rel b { display: block; color: var(--ink-900); }
.kg-rel small { display: block; color: var(--ink-500); font-size: 11.5px; }
.kg-rel em { display: block; font-style: normal; color: var(--ink-700); font-size: 12.5px; margin-top: 2px; }
.kg-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.kg-chips button { border: 1px solid var(--rule-strong); background: var(--sheet); border-radius: 999px; padding: 4px 10px; font-size: 12px; cursor: pointer; color: var(--ink-700); box-shadow: inset 0 -2px 0 var(--c, transparent); }
.kg-chips button:hover { border-color: var(--ink-900); color: var(--ink-900); }
.kg-meta-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.kg-meta-grid div { background: var(--ground); border-radius: var(--radius-md); padding: 8px 10px; }
.kg-meta-grid b { display: block; font-family: var(--font-mono); font-size: 18px; color: var(--ink-900); }
.kg-meta-grid span { font-size: 11px; color: var(--ink-500); }
.kg-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
.kg-actions button, .kg-actions a { border: 1px solid var(--rule-strong); background: var(--sheet); border-radius: 999px; padding: 6px 13px; font-size: 12.5px; cursor: pointer; color: var(--ink-900); }
.kg-actions a:hover, .kg-actions button:hover { border-color: var(--ink-900); }

.kg-fallback { padding: 24px 0 60px; }
.kg-fallback h2 { margin-top: 28px; font-size: 22px; }
.kg-fallback h3 { margin-top: 14px; }
.kg-fallback ul { padding-left: 18px; list-style: disc; }

@media (max-width: 1100px) {
  .kg-wrap { height: auto; }
  .kg-body { grid-template-columns: 1fr; grid-template-rows: auto minmax(520px, 70vh) auto; }
  .kg-body.no-left { grid-template-columns: 1fr; }
  .kg-left { grid-template-columns: 1fr 1fr; }
  .kg-units { max-height: 220px; overflow: auto; }
  .kg-body.no-left { grid-template-rows: minmax(520px, 70vh) auto; }
  .kg-head { flex-direction: column; align-items: flex-start; }
}