:root{color-scheme:dark;--bg:#111820;--panel:#18212b;--border:#2a3542;--text:#e7edf3;--muted:#91a1b3;--mint:#72d4bd;--purple:#b69ff0;--gold:#e4bd75;--blue:#7ba8df}
*{box-sizing:border-box}
html{overscroll-behavior-x:none}   /* 触控板两指横滑是平移图谱，不是浏览器后退 */
body{margin:0;background:var(--bg);color:var(--text);font:13px/1.55 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
button,input{font:inherit}
button{color:var(--text);background:#22303e;border:1px solid var(--border);border-radius:7px;padding:7px 11px;cursor:pointer}
button:hover{border-color:#5c7a89;background:#2a3a49}
button:focus-visible,input:focus-visible,a:focus-visible{outline:2px solid var(--mint);outline-offset:2px}
a{color:var(--mint);text-decoration:none}
header{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 24px;border-bottom:1px solid var(--border);background:#17212b}
.brand{display:flex;gap:13px;align-items:center}
.brand-icon{width:37px;height:37px;border:1px solid #69897d;color:var(--mint);border-radius:11px;display:grid;place-items:center;font:25px Georgia,serif}
.brand b{font-size:18px;letter-spacing:1px}
.brand small{display:block;color:var(--muted);font-size:12px;letter-spacing:.3px;margin-top:4px}
.muted{color:var(--muted)}
.header-actions{display:flex;align-items:center;gap:20px}
.header-actions>span{color:var(--muted);font-size:12px}
.app{display:grid;grid-template-columns:var(--split-left,248px) minmax(300px,1fr) var(--split-right,318px);height:calc(100dvh - 76px);min-width:1024px;--split-line:#3a4c5c;--split-bg:#22303e;--split-ink:#c3d3e4;--split-hot:var(--mint)}   /* 左右栏可拖可收（split.js） */
aside{background:var(--panel);min-height:0}
.left{border-right:1px solid var(--border);position:relative;display:flex;flex-direction:column}
.search{display:flex;align-items:center;margin:18px 15px 8px;border:1px solid #3a4c5c;border-radius:8px;padding:8px;gap:6px;background:#111b25}
.search:focus-within{border-color:var(--split-hot)}
.search span{font-size:19px;color:var(--muted)}
.search input{width:100%;border:0;background:transparent;outline:0;color:var(--text);min-width:0;font-size:12px}
.search input::placeholder{color:var(--muted)}   /* 原 #757575 在深底上 3.8:1（C-270） */
.search kbd{font-size:12px;border:1px solid var(--border);padding:0 4px;border-radius:3px;color:var(--muted)}
#results{position:absolute;left:15px;right:15px;top:62px;z-index:5;background:#0f171f;border:1px solid #3a4c5c;border-radius:8px;max-height:60vh;overflow:auto;box-shadow:0 12px 30px #0008}
#results button{display:block;width:100%;text-align:left;border:0;border-bottom:1px solid var(--border);border-radius:0;background:none;padding:8px 12px}
#results button small{display:block;color:var(--muted);font-size:12px}
#results button:hover,#results button.hi{background:#1b2733}
.left-body{overflow:auto;padding:14px 15px 24px}
.eyebrow{font-size:12px;color:var(--muted);letter-spacing:1px;margin-bottom:11px}
#competencies{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px}
#competencies button{font-size:12px;padding:8px 2px;border-color:#3a4247;background:#222b30;text-align:left;color:#d6c39e;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#competencies button span{display:inline-block;width:6px;height:6px;background:var(--gold);border-radius:50%;margin:0 5px 1px 0}
#competencies button:hover{background:#2a3a49;border-color:#5c7a89}
#competencies button.active{background:#3c3630;border-color:var(--gold)}
.section-title{display:flex;justify-content:space-between;margin:29px 0 12px}
.section-title>span{font-size:12px;font-weight:600}
.section-title small{font-size:12px;color:var(--muted)}
.book{margin:3px 0}
.book>button{border:0;width:100%;display:flex;align-items:center;justify-content:space-between;text-align:left;background:none;font-size:12px;padding:9px 6px;color:#c3d3e4}
.book>button:hover{color:#fff}
.book>button.active{background:#25374a;color:#9fc2ef}
.book>button.pending{color:#8a97a5}
.book small{color:var(--muted);font-size:12px}
.chapter-list{padding:0 0 6px 13px}
.chapter-list button{display:block;width:100%;text-align:left;font-size:12px;color:var(--muted);padding:6px 8px;border:0;border-left:1px solid #364659;border-radius:0;background:none}
.chapter-list button:hover,.chapter-list button.active{color:#fff}
.chapter-list button.active{border-left-color:var(--blue)}
.sidebar-note{border-top:1px solid var(--border);margin-top:24px;padding-top:15px;color:#8a9aab;font-size:12px;line-height:1.9}
main{display:flex;flex-direction:column;min-width:0;min-height:0}
.toolbar{display:flex;justify-content:space-between;align-items:center;padding:14px 22px 0}
.view-tabs{display:flex;gap:6px}
.view-tabs button{font-size:12px;padding:6px 12px;background:none}
.view-tabs button.active{background:#25374a;border-color:#3f5a73;color:#9fc2ef}
.scope{display:flex;justify-content:space-between;align-items:flex-end;padding:14px 22px 10px}
.scope span#breadcrumb{font-size:12px;color:var(--muted);letter-spacing:1px}
.scope h1{margin:4px 0 0;font-size:18px;font-weight:550;letter-spacing:.5px}
#view-count{font-size:12px;color:var(--muted);text-align:right;letter-spacing:1px;line-height:1.7}
#graph-wrap{flex:1;position:relative;min-height:170px;background:#0f161d;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
#graph{width:100%;height:100%;display:block;cursor:grab;touch-action:none}
.graph-help{position:absolute;right:16px;bottom:12px;font-size:12px;color:#8194a8;letter-spacing:.5px;pointer-events:none}
.zoom{position:absolute;right:14px;top:14px;display:flex;flex-direction:column;gap:6px}
.zoom button{width:30px;height:30px;padding:0;font-size:16px;line-height:1}
#tooltip{position:absolute;pointer-events:none;background:#0d141b;border:1px solid #3a4c5c;color:var(--text);font-size:12px;padding:5px 9px;border-radius:6px;max-width:260px;z-index:3}
.empty{position:absolute;inset:0;display:grid;place-items:center;color:var(--muted);font-size:13px;pointer-events:none}
.empty[hidden],#results[hidden],#tooltip[hidden]{display:none}
.filters{display:flex;align-items:center;gap:18px;padding:10px 22px;font-size:12px;color:#b9c7d5}
.filters label{display:flex;align-items:center;gap:5px;cursor:pointer}
.legend{margin-left:auto;display:flex;align-items:center;gap:6px;color:var(--muted)}
.legend i{display:inline-block;width:8px;height:8px;border-radius:50%;margin-left:8px}
.legend .gold{background:var(--gold)}.legend .blue{background:var(--blue)}.legend .mint{background:var(--mint)}.legend .purple{background:var(--purple)}
.status{display:flex;justify-content:space-between;padding:0 22px 10px;font-size:12px;color:var(--muted)}
.right{border-left:1px solid var(--border);display:flex;flex-direction:column}
.detail-top{height:49px;display:flex;justify-content:space-between;align-items:center;padding:0 19px;border-bottom:1px solid var(--border);color:var(--muted);font-size:12px;letter-spacing:1px}
.detail-top button{padding:2px 7px;font-size:12px;background:none}
#detail{overflow:auto;padding:22px 19px 40px}
#detail h2{font-size:23px;line-height:1.5;margin:12px 0 8px;letter-spacing:.4px;font-weight:550}
#detail h3{font-size:12px;margin:23px 0 10px;color:#bfcddd;display:flex;justify-content:space-between}
#detail p{color:#aab9c8;font-size:12px;line-height:1.85;margin:12px 0}
.type-badge{display:inline-block;padding:3px 8px;border:1px solid #3a4c5c;border-radius:5px;font-size:12px;color:var(--muted);letter-spacing:1px;margin-right:6px}
.type-badge.status{border-color:#4a4034;color:#c9ab77}
.node-id{font-size:12px;color:#8194a8;font-family:ui-monospace,Menlo,monospace}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.chip{font:inherit;font-size:12px;padding:3px 9px;border-radius:6px;border:1px solid #3a4c5c;color:#c3d3e4;background:#1f2a35;cursor:pointer}
.chip.book{border-color:#3f5a73;color:#9fc2ef}
.chip:hover{border-color:#5c7a89}
.chip.book:hover{border-color:#7ba8df}
.chip.tag{border-color:#4a4034;color:#d6c39e;background:#2b2621;cursor:pointer}
.chip.tag.on{background:#3c3630;border-color:var(--gold);color:#f0dcae}
.chip.tag.p{opacity:.7}
.chip .del{margin-left:6px;color:#8a97a5;cursor:pointer}
.actions{display:flex;gap:6px;margin:14px 0}
.actions button{flex:1;font-size:12px;padding:7px 4px}
.actions button.active{background:#25374a;border-color:#3f5a73}
.tag-input{display:flex;gap:6px;margin:6px 0 0}
.tag-input input{flex:1;background:#111b25;border:1px solid #3a4c5c;border-radius:6px;padding:6px 8px;color:var(--text);font-size:12px;min-width:0}
.tag-input button{padding:0 10px}
.small-link{font-size:12px;color:var(--muted);cursor:pointer;margin-left:8px;border:0;background:none;padding:0;font-family:inherit}
.small-link:hover{text-decoration:underline}
.relation{display:flex;justify-content:space-between;align-items:center;padding:7px 9px;margin:4px 0;border:1px solid var(--border);border-radius:7px;background:#141d26;cursor:pointer;font-size:12px}
.relation:hover{border-color:#5c7a89}
.relation:focus-visible{outline:2px solid var(--mint);outline-offset:1px}
.relation em{display:block;font-style:normal;font-size:12px;color:var(--muted)}
.relation.review{border-style:dashed}
.relation small{color:var(--muted)}
.quote{padding:8px 10px;margin:8px 0;color:#aab9c8;font-size:12px;line-height:1.8;background:#141d26;border:1px solid #2c3d3a;border-radius:6px}
.quote small{display:block;color:var(--muted);margin-top:4px}
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:14px 0}
.stats-grid div{border:1px solid var(--border);border-radius:8px;padding:10px 12px;background:#141d26}
.stats-grid b{display:block;font-size:20px;font-weight:550}
.stats-grid small{color:var(--muted);font-size:12px}
.warning{border:1px solid #4a4034;background:#2b2621;color:#d6c39e;padding:9px 11px;border-radius:7px;font-size:12px;line-height:1.7;margin:12px 0}
.hint{color:#8194a8;font-size:12px;line-height:1.7}
/* 题库（C-18）：图谱下方展开的题目面板；题图是白底 PNG，放在白卡片上 */
.bank-sheet{flex:0 0 52%;min-height:0;display:flex;flex-direction:column;background:#131c25;border-bottom:1px solid var(--border)}
.bank-grip{height:7px;cursor:row-resize;background:#1b2632;border-bottom:1px solid var(--border);position:relative;touch-action:none}
.bank-grip::before{content:'';position:absolute;left:0;right:0;top:-8px;bottom:-8px}   /* 命中区 23 px，触屏 44 px */
@media (pointer:coarse){.bank-grip::before{top:-18px;bottom:-19px}}
.bank-grip::after{content:'';position:absolute;left:50%;top:2px;width:36px;height:3px;margin-left:-18px;border-radius:2px;background:#3f5163}
.bank-grip:hover::after,.bank-grip.drag::after{background:var(--gold)}
.bank-sheet[hidden]{display:none}
.bank-head{display:flex;align-items:center;gap:14px;padding:10px 22px;border-bottom:1px solid var(--border)}
.bank-name{display:flex;align-items:baseline;gap:8px;min-width:0;flex:1}
.bank-name span{font-size:12px;letter-spacing:2px;color:var(--gold)}
.bank-name b{font-size:14px;font-weight:550;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bank-name small{color:var(--muted);font-size:12px;white-space:nowrap}
.bank-tabs{display:flex;gap:4px}
.bank-tabs button{font-size:12px;padding:3px 10px;background:none;border-radius:12px}
.bank-tabs button.active{background:#3c3630;border-color:var(--gold);color:#f0dcae}
#bank-close{font-size:12px;padding:3px 10px;background:none}
.bank-body{overflow:auto;padding:14px 22px 22px;outline:0}
.bank-list{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.bank-list figure{margin:0;background:#fff;border-radius:8px;padding:10px 12px 8px;color:#1d2a33}
.bank-list figure>a{display:block;cursor:zoom-in}
.bank-list img{display:block;width:100%;height:auto;max-height:520px;object-fit:contain;object-position:left top}
.bank-list figcaption{display:flex;flex-wrap:wrap;align-items:center;gap:4px 8px;margin-top:8px;padding-top:7px;border-top:1px solid #e5e9ec;font-size:12px;color:#5b6b78}
.bank-list figcaption .src{color:#1d2a33}
.bank-list figcaption .p{font-variant-numeric:tabular-nums;color:#1f4d3a}
.bank-list .also{margin-left:auto;display:flex;flex-wrap:wrap;gap:4px;align-items:center}
.bank-list .also button{font-size:12px;padding:1px 7px;border-radius:10px;background:#eaf6f2;border-color:#bfe3d6;color:#1f5a47}
.bank-list .also button:hover{background:#d8efe7}
.bank-foot{max-width:900px;margin:12px auto 0;display:flex;align-items:center;gap:12px;color:var(--muted);font-size:12px}
.bank-msg{max-width:900px;margin:10px auto;color:#aab9c8;font-size:12px;line-height:1.9}
.bank-msg.err{color:#f0b6a8}
.bank-kps{max-width:900px;margin:0 auto;display:flex;flex-wrap:wrap;gap:6px}
.bank-kps button{font-size:12px;padding:4px 10px;border-radius:14px}
.bank-kps button small{color:var(--gold);margin-left:4px;font-variant-numeric:tabular-nums}
.bank-kps button[disabled]{opacity:.45;cursor:default}
.bank-open{width:100%;font-size:12px;padding:8px 10px;border-color:#4a4034;background:#2b2621;color:#f0dcae}
.bank-open:hover{background:#3c3630;border-color:var(--gold)}
.relation .qn{font-size:12px;color:#c9ab77;margin-left:auto;margin-right:8px;font-variant-numeric:tabular-nums;white-space:nowrap}
/* 3D（C-20） */
.tool-right{display:flex;align-items:center;gap:8px}
.dim-tabs{display:flex;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.dim-tabs button{border:0;border-radius:0;background:none;font-size:12px;padding:6px 12px;color:var(--muted)}
.dim-tabs button:hover{background:#22303e;color:#fff}
.dim-tabs button.active{background:#25374a;color:#9fc2ef}
.dim-tabs button:disabled{opacity:.5;cursor:not-allowed}   /* M-58 结构视图只有平面 */
.dim-tabs button:disabled:hover{background:none;color:var(--muted)}
#spin{font-size:12px;padding:6px 11px;background:none}
#spin.active{border-color:#3f5a73;color:#9fc2ef;background:#1c2a38}
#spin[hidden]{display:none}
/* M-58 分团：分团（课标主题 / 册）、只看一团 */
.cl-ctl{display:flex;align-items:center;gap:8px}
.cl-ctl[hidden],.cl-ctl label[hidden]{display:none}
.cl-ctl label{display:flex;align-items:center;gap:5px;font-size:12px;color:var(--muted)}
.cl-ctl select{font:inherit;font-size:12px;color:var(--text);background:#22303e;border:1px solid var(--border);border-radius:7px;padding:5px 8px;max-width:150px}
.cl-ctl select:focus-visible{outline:2px solid var(--mint);outline-offset:2px}
.filters label[hidden]{display:none}

/* 嵌在教师端：本班错题着色的图例、节点笔记里的错题数、题库的「＋ 练习单」 */
#heat-legend{position:absolute;left:14px;bottom:14px;z-index:5;display:flex;flex-direction:column;gap:4px;padding:9px 12px;border-radius:12px;background:rgba(255,255,255,.93);border:1px solid #dfe6ea;font-size:12.5px;color:#34424c;box-shadow:0 4px 18px rgba(0,0,0,.25);max-width:320px}
#heat-legend .scale{display:flex;gap:3px}
#heat-legend .scale i{width:26px;height:8px;border-radius:4px;display:block}
#heat-legend small{color:#6c7a85}
.heat-note{margin:6px 0 10px;padding:8px 10px;border-radius:10px;background:#fbeee6;color:#8a3a14;font-size:13px}
.bank-add{margin-top:6px;border:1px solid #cfd9df;background:#fff;border-radius:8px;min-height:30px;padding:0 9px;font-size:12px;font-weight:700;color:#135468;cursor:pointer}
.bank-add.on{background:#e2eff3;border-color:transparent}
/* 进门测里怎么考（C-34，只在嵌进教师端时出现） */
.exam-traits{margin:6px 0 8px}
.chip.exam-tr{cursor:pointer;font-weight:700}
.chip.exam-tr b{margin-left:2px}
.chip.exam-tr.g-form{background:#e2eff3;color:#135468;border-color:#cfe3ea}
.chip.exam-tr.g-idea{background:#efeafb;color:#6b55b8;border-color:#ded5f5}
.chip.exam-tr.g-model{background:#fcf0dd;color:#a95b17;border-color:#f1d3a4}
.chip.exam-tr:hover{filter:brightness(.96)}

/* 触屏：可点目标提到 ≥44px（桌面密度不变，对齐 split.js 的 coarse 先例） */
@media (pointer:coarse){
  .header-actions a,.header-actions button{min-height:44px;display:inline-flex;align-items:center}
  .view-tabs button,.dim-tabs button,#spin{min-height:44px;padding:6px 16px}
  .zoom button{width:44px;height:44px}
  #competencies button{min-height:44px}
  .book>button,.chapter-list button{min-height:44px}
  .detail-top button,.actions button{min-height:44px}
  .bank-tabs button,#bank-close,.bank-kps button{min-height:44px}
  .filters label{min-height:44px}
  .cl-ctl select{min-height:44px}
  .filters input[type=checkbox]{transform:scale(1.4)}
}

/* 手机 / 窄屏（< 1024，C-270，2026-10-27）：三栏改单栏，图谱在上、左右栏在下；桌面优先的约定不变，只保证不横向溢出、能点。
   同一次把 31 处 11px 提到 12px（功能文字下限），搜索框占位符换成 --muted。 */
@media (max-width:1023px){
  header{height:auto;min-height:56px;flex-wrap:wrap;gap:6px 12px;padding:8px 14px}
  .brand small{display:none}
  .header-actions{gap:8px;flex-wrap:wrap}
  .app{display:flex;flex-direction:column;min-width:0;height:auto;min-height:calc(100dvh - 56px)}
  .app>aside{width:auto!important;max-width:none;overflow:visible}
  main{order:1;min-height:0}
  #graph-wrap{flex:none;height:56dvh;min-height:260px}
  .left{order:2;border-right:0;border-bottom:1px solid var(--border)}
  .left-body{overflow:visible}
  .right{order:3;border-left:0;border-top:1px solid var(--border)}
  #detail{overflow:visible}
  .split-h{display:none}
  .toolbar,.scope,.filters,.status{flex-wrap:wrap;gap:8px 12px;padding-left:14px;padding-right:14px}
  .bank-sheet{flex:none;max-height:60dvh}
}