/* 神经传导交互实验 v2 · 样式：MBL v2 共享样式 + 任务 1 舞台 + 任务 2 观察区 */
:root{
  --teal:#0e9488; --teal-d:#0b6f66; --teal-l:#e6f4f2;
  --ink:#1f2d2b; --ink-soft:#4b5d5b; --line:#dce7e4;
  --card:#ffffff; --bg:#f4f9f8; --warn:#e11d48; --amber:#f59e0b;
  --radius:14px; --shadow:0 4px 16px rgba(14,148,136,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.65}
.topbar{background:linear-gradient(90deg,var(--teal-d),var(--teal));color:#fff;padding:10px 0}
.topbar-inner{max-width:1180px;margin:0 auto;padding:0 16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.brand{font-weight:800;font-size:17px;color:#fff;text-decoration:none;display:flex;align-items:center;gap:8px}
.brand .dot{width:10px;height:10px;border-radius:50%;background:#8ff0e4;display:inline-block}
.who{font-size:13px;color:#d9f3ef;margin-left:auto}
.wrap{max-width:1180px;margin:0 auto;padding:18px 16px 60px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px 22px;margin-bottom:16px}
.sec{font-size:17px;color:var(--teal-d);margin-bottom:10px;font-weight:800}
.hint{font-size:13px;color:var(--ink-soft);background:#fff8ec;border:1px solid #f6e3bd;border-radius:8px;padding:8px 12px;margin:8px 0}
.btn{cursor:pointer;border:none;border-radius:10px;font-weight:700;padding:10px 22px;font-size:15px;font-family:inherit}
.btn.main{background:var(--teal);color:#fff}
.btn.main:disabled{background:#b9d4d0;cursor:not-allowed}
.btn.ghost{background:var(--teal-l);color:var(--teal-d)}
.btn.ghost:disabled{opacity:.5;cursor:not-allowed}
.btn.warn{background:var(--warn);color:#fff}
.btn.small{padding:6px 14px;font-size:13px;border-radius:8px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
/* 任务栏 */
.taskbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.taskbtn{cursor:pointer;border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:8px 20px;font-size:14.5px;font-weight:700;font-family:inherit;color:var(--ink)}
.taskbtn.on{border-color:var(--teal);background:var(--teal);color:#fff}
.taskbtn.locked{border-style:dashed;color:var(--ink-soft);background:#fafcfb;cursor:not-allowed}
/* 条件选项（二选一按钮） */
.optrow{margin:10px 0}
.optrow .lbl{display:block;font-size:13.5px;font-weight:700;margin-bottom:4px}
.optbtns{display:flex;gap:6px;flex-wrap:wrap}
.optbtns button{flex:1 0 40px;cursor:pointer;border:1.5px solid var(--line);background:#fafcfb;border-radius:8px;padding:7px 0;font-size:14px;font-weight:700;font-family:inherit;color:var(--ink)}
.optbtns button.on{border-color:var(--teal);background:var(--teal);color:#fff}
.optbtns button:disabled{opacity:.55;cursor:not-allowed}
/* 实验区布局 */
.lab-layout{display:grid;grid-template-columns:300px 1fr;gap:14px;align-items:start}
.lab-layout.withchart{grid-template-columns:290px 1fr 400px}
@media(max-width:1080px){.lab-layout,.lab-layout.withchart{grid-template-columns:1fr}}
.panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;box-shadow:0 2px 10px rgba(14,148,136,.06)}
.panel h3{font-size:14px;margin-bottom:10px;color:var(--teal-d)}
.ctl{margin:12px 0}
.ctl label{display:flex;justify-content:space-between;font-size:13.5px;margin-bottom:4px;font-weight:600}
.ctl input[type=range]{width:100%}
canvas{display:block;width:100%;border-radius:10px;background:#fff}
.readout{display:grid;gap:8px;margin-top:8px}
.rd{background:var(--teal-l);border-radius:8px;padding:6px 4px;text-align:center}
.rd b{display:block;font-size:18px;color:var(--teal-d)}
.rd span{font-size:11.5px;color:#0b6f66}
.resultbar{margin-top:10px;background:var(--teal-l);border:1.5px solid var(--line);border-radius:8px;padding:8px 12px;font-size:13.5px;font-weight:600;color:var(--ink-soft)}
table.data{border-collapse:collapse;width:100%;font-size:13px;margin-top:8px}
table.data th,table.data td{border:1px solid var(--line);padding:4px 8px;text-align:center}
table.data th{background:var(--teal-l);color:var(--teal-d)}
/* 数学系列预测页 */
.predict-line{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:16px 0 4px;font-size:16px;font-weight:700}
.predict-line select{font-family:inherit;font-size:15px;font-weight:700;color:var(--teal-d);background:#fff;border:1.5px solid var(--teal);border-radius:8px;padding:7px 10px}
.curvegrid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:12px 0}
@media(max-width:760px){.curvegrid{grid-template-columns:1fr}}
.curvecard{display:block;width:100%;cursor:pointer;font-family:inherit;text-align:center;background:#fff;border:2px solid var(--line);border-radius:12px;padding:10px}
.curvecard svg{display:block;width:100%;height:auto}
.curvecard span{display:block;margin-top:4px;font-size:14px;font-weight:700;color:var(--ink)}
.curvecard.on{border-color:var(--teal);background:var(--teal-l)}
.curvecard.on span{color:var(--teal-d)}
.mypredict{margin-top:8px;padding:6px 10px;border-radius:8px;background:var(--teal-l);color:var(--teal-d);font-size:13.5px}
.screen{display:none}
.screen.on{display:block}
.foot{margin-top:30px;text-align:center;font-size:12.5px;color:var(--ink-soft)}
/* 登记页 */
.regbox{max-width:430px;margin:60px auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px}
.regbox h1{font-size:20px;color:var(--teal-d);margin-bottom:4px}
.regbox p{font-size:13.5px;color:var(--ink-soft);margin-bottom:16px}
.regbox .field{margin:12px 0}
.regbox .field label{display:block;font-weight:700;font-size:14px;margin-bottom:4px}
.regbox input,.regbox select{width:100%;font-family:inherit;font-size:15px;padding:9px 10px;border:1.5px solid var(--line);border-radius:8px}
.regbox input:focus{border-color:var(--teal);outline:none}

/* ===== 任务 1 · 舞台与电流表（原 neuro lab v1） ===== */
.stage{position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;padding:8px}
.stage svg{width:100%;height:auto;display:block;touch-action:none;user-select:none}
.stage .site{fill:#8a8f94;stroke:#5c6166;stroke-width:1.5}
.stage .site.hot{stroke:var(--teal);stroke-width:3}
.stage .site.used{fill:#5c6166}
.stage .sitelbl{font-size:22px;font-family:Arial,sans-serif;fill:#222}
.stage .wire{fill:none;stroke-width:4;stroke-linecap:round}
.stage .wire.left{stroke:#d64545}
.stage .wire.right{stroke:#333}
.stage .plug{cursor:grab;stroke:#fff;stroke-width:2}
.stage .plug.left{fill:#d64545}
.stage .plug.right{fill:#333}
.stage .plug.dragging{cursor:grabbing}
.stage .needle{stroke:#c0392b;stroke-width:3;stroke-linecap:round;transform-box:fill-box;transform-origin:50% 100%;transition:transform .6s cubic-bezier(.3,1.4,.5,1)}
.stage .charge{font-size:20px;font-weight:700;font-family:Arial,sans-serif;opacity:0;transition:opacity .8s}
.stage .charge.plus{fill:#d64545}
.stage .charge.minus{fill:#2b6cb0}
.stage.revealed .charge{opacity:1}
.readbox{display:inline-flex;align-items:center;gap:8px;font-size:14px;background:#f7f9f8;border:1px solid var(--line);border-radius:8px;padding:6px 10px;margin-top:6px}
.readbox b{font-family:Consolas,monospace;font-size:16px;min-width:88px;display:inline-block;text-align:center}
.rectable{width:100%;border-collapse:collapse;font-size:13.5px}
.rectable th,.rectable td{border:1px solid var(--line);padding:6px 8px;text-align:center}
.rectable th{background:#f3f8f7;font-weight:700}
.rectable select{font-family:inherit;font-size:13px;padding:3px 4px;max-width:180px}
.rectable .del{color:var(--ink-soft);font-size:12px;cursor:pointer;text-decoration:underline}
.concl .opt{display:block;margin:6px 0;font-size:15px;cursor:pointer}
.concl .opt input{margin-right:8px}
.concl.locked .opt{cursor:default;color:var(--ink-soft)}
.stage .svgbtn{cursor:pointer}
.stage .svgbtn rect{fill:#e6f4f2;stroke:#0e9488;stroke-width:1.2}
.stage .svgbtn text{font-size:12px;font-weight:700;fill:#0b6f66;font-family:"Microsoft YaHei","PingFang SC",sans-serif;pointer-events:none}
.stage .svgbtn:hover rect{fill:#d2ece8}

/* ===== 任务 2 · 兴奋传导模拟（原 nrtlab） ===== */
.wrap{max-width:1400px}
.lab3{display:grid;grid-template-columns:200px 1fr 300px;gap:14px;align-items:stretch}
@media(max-width:1180px){.lab3{grid-template-columns:200px 1fr}.lab3 .rightcol{grid-column:1/-1}}
@media(max-width:860px){.lab3{grid-template-columns:1fr}}
.panel.left{font-size:13px}
.panel.left h3{font-size:13px;margin-bottom:6px}
.panel.left .blk{margin-bottom:14px}
.ctlbar{display:grid;grid-template-columns:1.25fr 1fr 1.25fr;gap:14px;align-items:end;margin-top:10px}
@media(max-width:1000px){.ctlbar{grid-template-columns:1fr 1fr}.ctlbar>div:first-child{grid-column:1/-1}}
.ctlbar .row .btn{padding:10px 6px;font-size:14px;white-space:nowrap}
.ctlbar .lbl{display:block;font-size:13.5px;font-weight:700;margin-bottom:5px}
.stim{display:flex;gap:8px}
.stim .btn{flex:1;padding:11px 0;font-size:16px;font-weight:800;letter-spacing:1px;border-radius:10px;box-shadow:0 2px 6px rgba(0,0,0,.15)}
.ctlbar .ctl{margin:0}
.ctlbar .row{flex-wrap:nowrap}
.btn.s-press{background:#7c3aed;color:#fff}
.btn.s-elec{background:#d97706;color:#fff}
.btn.s-light{background:#2563eb;color:#fff}
.protgrid{display:grid;grid-template-columns:1fr 1fr;gap:6px 6px}
.protgrid .lbl{display:block;font-size:12.5px;font-weight:700;margin-bottom:2px;white-space:nowrap}
.protgrid .optbtns{flex-wrap:nowrap}
.protgrid .optbtns button{flex:1 1 0;min-width:0;padding:4px 0;font-size:12.5px}
.conc{display:grid;grid-template-columns:30px 1fr 1fr 34px;gap:4px 4px;align-items:center;font-size:12.5px}
.conc .v{display:block;font-size:14px;font-weight:700;padding:4px 0;border:1.5px solid var(--line);border-radius:7px;text-align:center;color:var(--teal-d);background:#fafcfb}
.conc .h{font-size:11.5px;color:var(--ink-soft);text-align:center}
.conc .d{font-size:12px;font-weight:700;text-align:center;color:var(--ink-soft)}
.panel.left .hint{font-size:12px;padding:6px 8px;margin:6px 0 0}
.rightcol .readout{grid-template-columns:1fr 1fr;margin-top:10px}
.rightcol .rd b{font-size:16px}
.chart-head{display:flex;justify-content:space-between;align-items:center}
.chart-head span{font-weight:400;font-size:12px;color:var(--ink-soft)}
.tablewrap{max-height:340px;overflow:auto;margin-top:8px}
table.data{table-layout:fixed;margin-top:0}
table.data th{position:sticky;top:0;z-index:1;font-size:12.5px;line-height:1.3;padding:5px 4px}
table.data th small{display:block;font-weight:400;font-size:11.5px}
table.data td{padding:4px 4px}
table.data td.ph{font-weight:700;color:var(--teal-d)}
table.data tr.first td{border-top:2px solid var(--teal)}

/* ===== v2 顶栏主页链接与任务栏 ===== */
.topbar .home{color:#d9f3ef;text-decoration:none;font-size:13px;border:1px solid rgba(255,255,255,.45);border-radius:999px;padding:3px 12px}
.topbar .home:hover{background:rgba(255,255,255,.15)}
.taskbar .spacer{flex:1}