/* Knowledge Graph explorer — Xmind/Kumu 式分组卡片 + 就地展开 + 预览卡
   深色只作用于画布容器（body.graph-dark .gx-canvas），外围沿用原站品牌 */
:root {
  --gx-blue: #3182CE; --gx-dark: #142D6D; --gx-accent: #0693E3; --gx-cta: #d42427;
  --gx-ink: #1a1a2e; --gx-ink2: #4a5568; --gx-muted: #8896a7;
  --gx-bg: #f5f7fa; --gx-card: #ffffff; --gx-line: #e2e8f0;
  --gx-ok: #2f855a; --gx-warn: #c05621;
}
body.graph-dark { background: #f5f7fa; }
.gx-wrap { max-width: 1280px; margin: 0 auto; padding: 18px 20px 60px; }
.gx-facts small { display:block; margin-top:4px; font-size:11px; line-height:1.4; color:#8896a7; }

/* 工具条 */
.gx-bar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.gx-bar input[type="search"] { flex: 1 1 240px; max-width: 380px; padding: 9px 14px; border: 1px solid var(--gx-line); border-radius: 6px; font: inherit; background: var(--gx-card); color: var(--gx-ink); }
.gx-search-drop { position: absolute; z-index: 30; background: var(--gx-card); border: 1px solid var(--gx-line); border-radius: 8px; box-shadow: 0 8px 24px rgba(20,45,109,.14); max-height: 300px; overflow: auto; min-width: 280px; }
.gx-search-drop button { display: block; width: 100%; text-align: left; padding: 8px 12px; border: 0; background: none; border-bottom: 1px solid var(--gx-line); color: var(--gx-ink); font: inherit; cursor: pointer; }
.gx-search-drop button:hover { background: #EBF4FF; }
.gx-toggle { border: 1px solid var(--gx-line); background: var(--gx-card); color: var(--gx-ink2); border-radius: 6px; padding: 8px 14px; font-weight: 600; cursor: pointer; }
body.graph-dark .gx-toggle { background: #14204a; color: #cbd5e0; border-color: #2a3f7a; }
.gx-ctx { display: inline-flex; gap: 8px; align-items: center; background: #EBF4FF; color: var(--gx-dark); border-radius: 999px; padding: 6px 14px; font-size: 12.5px; font-weight: 600; }
body.graph-dark .gx-ctx { background: #1b2c5e; color: #9fd7f5; }
.gx-ctx[hidden] { display: none; }
.gx-ctx .x { border: 0; background: rgba(0,0,0,.12); border-radius: 50%; width: 18px; height: 18px; cursor: pointer; font-size: 11px; }

/* 画布 */
.gx-canvas { background: var(--gx-bg); border: 1px solid var(--gx-line); border-radius: 14px; padding: 20px; overflow-x: auto; position: relative; }
body.graph-dark .gx-canvas { background: #0a132d; border-color: #23386e; }
.gx-h { font-size: 12px; letter-spacing: 2.2px; text-transform: uppercase; color: var(--gx-muted); margin: 18px 4px 10px; font-weight: 700; }
body.graph-dark .gx-h { color: #5b739e; }
.gx-hint { position: absolute; bottom: 8px; left: 14px; font-size: 11px; color: var(--gx-muted); }
body.graph-dark .gx-hint { color: #5b739e; }
#gxSvg { display: block; width: 100%; min-width: 900px; height: auto; }

/* SVG 网络 */
.gx-col-head { font-size: 10px; fill: var(--gx-muted); letter-spacing: 2px; text-transform: uppercase; font-weight: 700; }
body.graph-dark .gx-col-head { fill: #5b739e; }
.gx-edge { fill: none; stroke: rgba(49,130,206,.5); stroke-width: 1.4; pointer-events: none; }
.gx-edge-pend { stroke-dasharray: 4 4; stroke: rgba(236,201,75,.5); }
.gx-edge-dim { stroke-opacity: .12; }
body.graph-dark .gx-edge { stroke: rgba(79,195,247,.45); }
.gx-edge-hit { fill: none; stroke: transparent; stroke-width: 14; cursor: pointer; }
.gx-node-box { fill: var(--gx-card); stroke: var(--gx-blue); stroke-width: 1.8; }
body.graph-dark .gx-node-box { fill: #101c40; stroke: #4a7ec7; }
.gx-svg-node { cursor: pointer; }
.gx-svg-node:hover .gx-node-box, .gx-svg-node.gx-sel .gx-node-box { stroke: var(--gx-accent); stroke-width: 2.6; filter: drop-shadow(0 0 6px rgba(6,147,227,.5)); }
body.graph-dark .gx-svg-node:hover .gx-node-box, body.graph-dark .gx-svg-node.gx-sel .gx-node-box { stroke: #7ee0ff; }
.gx-node-label { font-size: 11px; fill: var(--gx-ink2); font-weight: 600; font-family: inherit; }
body.graph-dark .gx-node-label { fill: #b7c8e4; }
.gx-node-flag { font-size: 20px; }
.gx-node-ref { font-size: 13px; fill: #7ee0ff; font-weight: 800; }
.gx-node-sub { font-size: 10px; fill: var(--gx-muted); }
.type-pollutant .gx-node-box { stroke: #DD6B20; }
.type-regulation .gx-node-box { stroke: #B47828; }
.type-process .gx-node-box { stroke: #0693E3; }

/* 分组卡片（Xmind Zone） */
.gx-groups { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.gx-card { background: var(--gx-card); border: 1px solid var(--gx-line); border-radius: 12px; padding: 16px 18px; position: relative; transition: box-shadow .15s ease; }
.gx-card:hover { box-shadow: 0 6px 20px rgba(20,45,109,.12); }
.gx-card.sel { border-color: var(--gx-blue); box-shadow: 0 0 0 3px rgba(49,130,206,.18); }
body.graph-dark .gx-card { background: #101c40; border-color: #27407c; }
body.graph-dark .gx-card.sel { border-color: #4fc3f7; box-shadow: 0 0 0 3px rgba(79,195,247,.2); }
.gx-card h3 { font-size: 16.5px; color: var(--gx-ink); margin: 0 0 2px; display: flex; align-items: center; gap: 8px; }
body.graph-dark .gx-card h3 { color: #eef4fb; }
.gx-card .sub { font-size: 12px; color: var(--gx-muted); }
.gx-badge { display: inline-block; font-size: 10.5px; font-weight: 800; border-radius: 4px; padding: 2px 8px; }
.gx-badge.v { background: #E9F8EF; color: var(--gx-ok); }
.gx-badge.r { background: #FDF6E3; color: #744210; }
.gx-badge.p { background: #FED7D7; color: #822727; }
body.graph-dark .gx-badge.v { background: rgba(47,133,90,.25); color: #9ae6b4; }
body.graph-dark .gx-badge.r { background: rgba(236,201,75,.2); color: #ecc94b; }
.gx-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.gx-chip { border: 1px solid var(--gx-line); background: var(--gx-bg); color: var(--gx-ink2); font-size: 12px; font-weight: 600; border-radius: 999px; padding: 4px 12px; cursor: pointer; }
.gx-chip:hover { border-color: var(--gx-blue); color: var(--gx-dark); }
body.graph-dark .gx-chip { background: #0d1936; border-color: #2a437e; color: #b7c8e4; }
body.graph-dark .gx-chip:hover { border-color: #4fc3f7; color: #e8f4ff; }
.gx-chip.pend { opacity: .55; border-style: dashed; }

/* 就地展开区（不重排：卡片内 details 式） */
.gx-expand { margin-top: 12px; border-top: 1px dashed var(--gx-line); padding-top: 12px; }
body.graph-dark .gx-expand { border-color: #27407c; }
.gx-tree, .gx-tree ul { list-style: none; margin: 0; padding-left: 18px; }
.gx-tree > li { margin: 4px 0; }
.gx-tree li { position: relative; }
.gx-tree li::before { content: ""; position: absolute; left: -12px; top: 14px; width: 9px; height: 1.5px; background: var(--gx-muted); opacity: .6; }
.gx-node { display: inline-flex; align-items: center; gap: 8px; background: var(--gx-bg); border: 1px solid var(--gx-line); border-radius: 8px; padding: 6px 12px; cursor: pointer; color: var(--gx-ink); font-size: 13px; font-weight: 600; }
.gx-node:hover { border-color: var(--gx-blue); }
.gx-node.sel { border-color: var(--gx-accent); box-shadow: 0 0 0 2px rgba(6,147,227,.2); }
.gx-node .t { font-size: 10px; color: var(--gx-muted); font-weight: 700; text-transform: uppercase; letter-spacing: .5px; }
body.graph-dark .gx-node { background: #0d1936; border-color: #2a437e; color: #d7e4f6; }
.gx-node img { width: 40px; height: 28px; object-fit: cover; border-radius: 4px; border: 1px solid var(--gx-line); }
.gx-mini { display: flex; gap: 8px; flex-wrap: wrap; }

/* 记录卡 */
.gx-records { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.gx-rec { background: var(--gx-card); border: 1px solid var(--gx-line); border-radius: 10px; padding: 12px 14px; cursor: pointer; }
.gx-rec:hover { border-color: var(--gx-accent); }
body.graph-dark .gx-rec { background: #101c40; border-color: #27407c; }
.gx-rec b { color: var(--gx-ink); font-size: 13.5px; }
body.graph-dark .gx-rec b { color: #eef4fb; }
.gx-rec .sub { font-size: 11.5px; color: var(--gx-muted); }

/* 预览卡（Kumu popover 模式） */
.gx-preview { position: fixed; top: 132px; right: 18px; width: 380px; max-width: calc(100vw - 36px); max-height: calc(100vh - 110px); overflow: auto; background: var(--gx-card); border: 1px solid var(--gx-line); border-radius: 14px; box-shadow: 0 16px 44px rgba(9,18,44,.24); z-index: 40; padding: 18px 20px; }
body.graph-dark .gx-preview { background: #101c40; border-color: #2a437e; color: #d7e4f6; }
.gx-preview h3 { color: var(--gx-ink); font-size: 16px; margin-bottom: 2px; }
body.graph-dark .gx-preview h3 { color: #eef4fb; }
.gx-preview .sub { font-size: 12px; color: var(--gx-muted); margin-bottom: 10px; }
.gx-preview .img { width: 100%; border-radius: 8px; border: 1px solid var(--gx-line); margin-bottom: 10px; cursor: zoom-in; }
.gx-facts { width: 100%; border-collapse: collapse; font-size: 12.5px; margin: 6px 0; }
.gx-facts th { text-align: left; color: var(--gx-muted); font-size: 10.5px; border-bottom: 1px solid var(--gx-line); padding: 4px 6px; }
.gx-facts td { border-bottom: 1px solid var(--gx-line); padding: 5px 6px; vertical-align: top; }
body.graph-dark .gx-facts td, body.graph-dark .gx-facts th { border-color: #27407c; }
.gx-rel { border: 1px solid var(--gx-line); border-left: 3px solid var(--gx-blue); border-radius: 6px; padding: 8px 10px; margin: 6px 0; font-size: 12.5px; cursor: pointer; background: rgba(235,244,255,.5); }
body.graph-dark .gx-rel { background: rgba(27,44,94,.5); border-color: #27407c; }
.gx-rel:hover { border-left-color: var(--gx-accent); }
.gx-acts { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.gx-btn { border: 0; border-radius: 6px; padding: 9px 14px; font-weight: 700; font-size: 12.5px; cursor: pointer; }
.gx-btn.p { background: var(--gx-dark); color: #fff; }
.gx-btn.c { background: var(--gx-cta); color: #fff; }
.gx-btn.g { background: var(--gx-bg); color: var(--gx-ink2); border: 1px solid var(--gx-line); }
.gx-ev { border: 1px solid var(--gx-line); border-left: 3px solid var(--gx-ok); border-radius: 6px; padding: 8px 10px; margin: 6px 0; font-size: 12px; }
.gx-ev blockquote { margin: 6px 0 2px; padding-left: 8px; border-left: 2px solid var(--gx-line); font-style: italic; color: var(--gx-ink2); }
.gx-close { position: absolute; top: 10px; right: 10px; border: 0; background: var(--gx-bg); color: var(--gx-muted); border-radius: 50%; width: 26px; height: 26px; cursor: pointer; font-size: 13px; }
.gx-empty { padding: 40px; text-align: center; color: var(--gx-muted); font-size: 13.5px; }
.gx-degrade { padding: 10px 14px; background: #FDF6E3; color: #744210; border-radius: 8px; font-size: 12.5px; margin: 8px 0; }
body.graph-dark .gx-degrade { background: rgba(236,201,75,.15); color: #ecc94b; }

@media (max-width: 700px) {
  .gx-preview { top: auto; bottom: 0; left: 0; right: 0; width: 100%; max-height: 72vh; border-radius: 14px 14px 0 0; }
  .gx-groups { grid-template-columns: 1fr; }
}