/* ================= 基础 ================= */
:root{
  --bg:#eef3f9;
  --panel:#ffffff;
  --line:#e3e9f2;
  --line-soft:#eef2f8;
  --text:#0f172a;
  --muted:#64748b;
  --muted-2:#94a3b8;
  --primary:#2563eb;
  --primary-d:#1d4ed8;
  --soft:#eef4ff;
  --ok:#16a34a;
  --warn:#f59e0b;
  --err:#dc2626;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 6px 20px rgba(15,23,42,.06);
  --shadow-lg:0 18px 48px rgba(15,23,42,.16);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:13px;overflow:hidden;-webkit-font-smoothing:antialiased;
}
.hidden{display:none !important}
button{font-family:inherit}
input,select,textarea{font-family:inherit;font-size:13px;color:var(--text)}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:#94a3b8}
::-webkit-scrollbar-track{background:transparent}

/* ================= 通用控件 ================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:5px;
  height:30px;padding:0 11px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:#fff;color:#334155;cursor:pointer;font-size:12.5px;line-height:1;
  transition:.15s;white-space:nowrap;
}
.btn:hover{border-color:#c7d2e0;background:#f8fafc;color:#0f172a}
.btn:active{transform:translateY(1px)}
.btn.active{background:var(--soft);border-color:#93c5fd;color:var(--primary-d);box-shadow:inset 0 0 0 1px rgba(37,99,235,.14)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-d);border-color:var(--primary-d);color:#fff}
.btn-ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn-ghost:hover{background:#f1f5f9;color:var(--text)}
.btn-sm{height:27px;padding:0 9px;font-size:12px}
.btn-lg{height:40px;font-size:14.5px;font-weight:600;letter-spacing:1px}
.btn-block{width:100%}
.btn-icon{width:30px;padding:0;font-size:14px}
.btn-run{background:var(--ok);border-color:var(--ok);color:#fff;font-weight:600}
.btn-run:hover{background:#15803d;border-color:#15803d;color:#fff}
.btn-danger{background:#fef2f2;border-color:#fecaca;color:var(--err)}
.btn-danger:hover{background:#fee2e2;border-color:#fca5a5;color:var(--err)}

.sel{
  height:28px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:#fff;padding:0 6px;cursor:pointer;outline:none;
}
.sel:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.sel-sm{height:26px;font-size:12px}

input[type=text],input[type=number],textarea{
  border:1px solid var(--line);border-radius:var(--radius-sm);padding:6px 8px;outline:none;background:#fff;width:100%;
}
input[type=text]:focus,input[type=number]:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}

.pill-soft{
  font-size:10.5px;color:var(--primary);background:var(--soft);border:1px solid #dbe7ff;
  padding:2px 6px;border-radius:6px;
}

/* ================= 登录 ================= */
.login{
  position:fixed;inset:0;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(1100px 600px at 15% 5%,#dbeafe 0%,transparent 60%),
             radial-gradient(900px 500px at 85% 95%,#d1fae5 0%,transparent 55%),
             #eff4fb;
  z-index:100;
}
.login-deco{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(37,99,235,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(37,99,235,.055) 1px,transparent 1px);
  background-size:34px 34px;
  mask-image:radial-gradient(circle at 50% 40%,#000 0%,transparent 75%);
}
.login-card{
  position:relative;width:392px;background:#fff;border-radius:18px;padding:28px 28px 20px;
  box-shadow:0 24px 60px rgba(15,23,42,.14);border:1px solid rgba(255,255,255,.8);
}
.login-brand{display:flex;gap:13px;align-items:center;margin-bottom:22px}
.logo{
  width:46px;height:46px;border-radius:14px;flex:none;
  background:linear-gradient(140deg,#3b82f6,#0ea5e9);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:23px;
  box-shadow:0 8px 18px rgba(37,99,235,.32);
}
.logo.sm{width:26px;height:26px;border-radius:8px;font-size:14px;box-shadow:none}
.login-brand h1{font-size:19px;margin:0 0 4px;letter-spacing:.5px}
.login-brand p{margin:0;font-size:12px;color:var(--muted)}
.field{display:block;margin-bottom:13px}
.field span{display:block;font-size:12px;color:var(--muted);margin-bottom:5px}
.field input{
  width:100%;height:38px;border:1px solid var(--line);border-radius:9px;padding:0 12px;outline:none;background:#fbfdff;
}
.field input:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.login-err{color:var(--err);font-size:12px;min-height:17px;margin-bottom:2px}
.login-tip{background:#f8fbff;border:1px dashed #d6e4f7;border-radius:10px;padding:10px 12px;margin:14px 0 10px;font-size:12px;color:#475569}
.tip-title{font-weight:600;color:#334155;margin-bottom:6px}
.tip-row{display:flex;align-items:center;gap:7px;line-height:1.7}
.tag{background:#e8f0fe;color:#1d4ed8;border-radius:5px;padding:1px 6px;font-size:11px}
.login-foot{text-align:center;color:var(--muted-2);font-size:11px;margin-top:12px}
.login-storage{
  margin:0 0 10px;padding:8px 10px;border-radius:9px;font-size:11.5px;line-height:1.7;
  background:#fffbeb;border:1px solid #fde68a;color:#92400e;
}
.login-storage.bad{background:#fef2f2;border-color:#fecaca;color:#991b1b}
.login-storage a{color:#1d4ed8;text-decoration:none;margin-left:4px;border-bottom:1px dashed #93c5fd}
.login-storage a:hover{color:#1e3a8a}

/* 存储占用列表 */
.storage-list{list-style:none;margin:4px 0 0;padding:8px 10px;background:#f8fafc;border:1px solid var(--line);border-radius:9px}
.storage-list li{display:flex;gap:10px;font-size:11.5px;color:var(--muted);padding:2px 0}
.storage-list li span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:"Consolas",ui-monospace,monospace}
.storage-list li b{flex:none;color:#334155;font-weight:600}

/* ================= 布局 ================= */
.app-shell{height:100vh;display:grid;grid-template-rows:54px 1fr}
.topbar{
  display:flex;align-items:center;gap:14px;padding:0 14px;background:#fff;
  border-bottom:1px solid var(--line);z-index:30;
}
.brand{display:flex;align-items:center;gap:8px;flex:none}
.brand-name{font-weight:600;font-size:14px;letter-spacing:.3px}
.role-switch{display:flex;background:#f1f5f9;border-radius:8px;padding:2px;margin-left:6px}
.rs-btn{border:0;background:transparent;font-size:11.5px;color:var(--muted);padding:4px 9px;border-radius:6px;cursor:pointer}
.rs-btn.active{background:#fff;color:var(--primary);box-shadow:0 1px 3px rgba(15,23,42,.12);font-weight:600}
.proj{flex:1;display:flex;align-items:center;gap:10px;min-width:0}
.proj-input{
  border:1px solid transparent;background:transparent;font-size:13px;font-weight:600;color:var(--text);
  padding:5px 8px;border-radius:7px;width:230px;outline:none;
}
.proj-input:hover{background:#f8fafc}
.proj-input:focus{background:#fff;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.proj-meta{font-size:11.5px;color:var(--muted-2)}
.top-actions{display:flex;align-items:center;gap:6px;flex:none}
.user-chip{display:flex;align-items:center;gap:6px;padding:0 6px 0 12px;border-left:1px solid var(--line);margin-left:4px;cursor:pointer;border-radius:8px;transition:.15s}
.user-chip:hover{background:#f1f5f9}
.user-chip:hover b{color:var(--primary)}
.user-chip b{font-size:12.5px;font-weight:600}
.role-badge{font-style:normal;font-size:10.5px;padding:2px 6px;border-radius:5px;background:#e8f0fe;color:#1d4ed8}
.role-badge.teacher{background:#fef3c7;color:#b45309}
.role-badge.admin{background:#ede9fe;color:#6d28d9}

/* 登录页身份选择 */
.rp-label{font-size:11.5px;color:var(--muted);margin-bottom:5px;display:block}
.role-pick{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:12px}
.rp-btn{
  height:38px;border:1px solid var(--line);background:#fff;border-radius:9px;font-size:12.5px;
  color:#475569;cursor:pointer;transition:.15s;display:flex;align-items:center;justify-content:center;gap:5px;
}
.rp-btn:hover{border-color:#b9d2fb;color:var(--primary);background:#f8fbff}
.rp-btn.active{border-color:var(--primary);background:#eff6ff;color:var(--primary);font-weight:600;box-shadow:0 0 0 3px rgba(37,99,235,.08)}

.workspace{display:grid;grid-template-columns:228px minmax(0,1fr) 292px;overflow:hidden}

/* ================= 左侧 ================= */
.panel-left{background:#fff;border-right:1px solid var(--line);display:grid;grid-template-rows:40px 1fr 38px;overflow:hidden}
.side-tabs{display:flex;border-bottom:1px solid var(--line);padding:0 6px}
.side-tab{
  flex:1;border:0;background:transparent;font-size:12.5px;color:var(--muted);cursor:pointer;
  border-bottom:2px solid transparent;padding:0 4px;height:40px;
}
.side-tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}
.side-body{overflow-y:auto;padding:10px}
.side-foot{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:0 10px;border-top:1px solid var(--line);font-size:11.5px;color:var(--muted)}

.pal-search{position:relative;margin-bottom:9px}
.pal-search input{height:30px;padding-left:28px;background:#f8fafc}
.pal-search i{position:absolute;left:9px;top:7px;font-style:normal;color:var(--muted-2);font-size:12px}
.pal-tools{display:flex;justify-content:space-between;align-items:center;font-size:10.5px;color:var(--muted-2);margin-bottom:2px}
.pal-tools a{color:var(--primary);text-decoration:none;cursor:pointer}
.pal-tools a:hover{text-decoration:underline}
/* 分类标题：点击展开 / 收起对应设备 */
.pal-cat{
  font-size:11.5px;color:#475569;margin:8px 0 7px;letter-spacing:.3px;
  display:flex;align-items:center;gap:6px;cursor:pointer;user-select:none;
  padding:6px 8px;background:#f8fafc;border:1px solid var(--line-soft);border-radius:8px;transition:.15s;
}
.pal-cat:hover{background:#eef4ff;border-color:#dbe7ff;color:var(--primary)}
.pal-cat .pc-caret{font-size:9px;width:10px;text-align:center;color:#94a3b8;transition:.15s}
.pal-cat.collapsed{color:var(--muted)}
.pal-cat .pc-catname{flex:1;font-weight:600}
.pal-cat .pc-count{font-size:10px;background:#e8f0fe;color:#1d4ed8;border-radius:9px;padding:1px 6px}
.pal-cat.collapsed .pc-count{background:#eef2f8;color:#94a3b8}
.pal-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.pal-card{
  border:1px solid var(--line);border-radius:10px;background:#fff;padding:9px 6px 7px;text-align:center;
  cursor:grab;transition:.15s;user-select:none;position:relative;
}
.pal-card:hover{border-color:#b9d2fb;box-shadow:0 4px 14px rgba(37,99,235,.12);transform:translateY(-1px)}
.pal-card:active{cursor:grabbing}
.pal-card .pc-icon{font-size:21px;line-height:1.2}
.pal-card .pc-name{font-size:11.5px;color:#334155;margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pal-card .pc-volt{font-size:9.5px;color:var(--muted-2)}
.pal-card.locked{opacity:.45;cursor:not-allowed}
.pal-card.locked::after{content:"🔒";position:absolute;top:4px;right:5px;font-size:9px}

.case-card{
  border:1px solid var(--line);border-radius:10px;padding:10px;margin-bottom:8px;cursor:pointer;transition:.15s;background:#fff;
}
.case-card:hover{border-color:#b9d2fb;box-shadow:var(--shadow)}
.case-top{display:flex;align-items:center;gap:7px;margin-bottom:4px}
.case-ico{font-size:17px}
.case-name{font-weight:600;font-size:12.5px}
.case-desc{font-size:11.5px;color:var(--muted);line-height:1.55}
.case-tags{display:flex;gap:5px;margin-top:6px;flex-wrap:wrap}
.mini-tag{font-size:10px;background:#f1f5f9;color:#64748b;border-radius:4px;padding:1px 5px}
.mini-tag.lv{background:#ecfdf5;color:#15803d}

.task-card{border:1px solid var(--line);border-radius:10px;padding:10px;margin-bottom:8px;background:#fff}
.task-card .tc-title{font-weight:600;font-size:12.5px;margin-bottom:4px}
.task-card .tc-desc{font-size:11.5px;color:var(--muted);line-height:1.55;margin-bottom:7px}
.task-card .tc-row{display:flex;gap:6px;align-items:center;justify-content:space-between}
.empty-tip{text-align:center;color:var(--muted-2);font-size:12px;padding:26px 10px;line-height:1.8}

/* ================= 舞台 ================= */
.stage{display:grid;grid-template-rows:44px 1fr auto;min-width:0;overflow:hidden;background:#f7f9fc}
.stage-toolbar{
  display:flex;align-items:center;gap:10px;padding:0 10px;background:#fff;border-bottom:1px solid var(--line);
}
.tb-group{display:flex;align-items:center;gap:6px}
.tb-right{margin-left:auto}
.sim-status{font-size:11.5px;color:var(--muted);padding-left:4px;white-space:nowrap}
.sim-status.on{color:var(--ok);font-weight:600}
.sim-status.on::before{content:"●";margin-right:4px;animation:blink 1.1s infinite}
@keyframes blink{50%{opacity:.25}}
.zoom-label{font-size:11.5px;color:var(--muted);width:38px;text-align:center}

.canvas-viewport{
  position:relative;overflow:hidden;background:#f7f9fc;
  background-image:linear-gradient(#e6edf7 1px,transparent 1px),linear-gradient(90deg,#e6edf7 1px,transparent 1px);
  background-size:24px 24px;cursor:default;
}
.canvas-world{position:absolute;left:0;top:0;width:3200px;height:2200px;transform-origin:0 0}
/* 导线层画在元件层之下（符合真实电路观感）；配合自动避障路由，导线会绕开元件，不会被盖住 */
.wire-layer{position:absolute;left:0;top:0;width:3200px;height:2200px;overflow:visible;pointer-events:none;z-index:1}
.comp-layer{position:absolute;left:0;top:0;width:100%;height:100%;pointer-events:none;z-index:2}
.comp{pointer-events:auto}

.canvas-hint{
  position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);text-align:center;
  color:var(--muted);pointer-events:none;user-select:none;max-width:520px;
}
.hint-emoji{font-size:40px;opacity:.5;margin-bottom:8px}
.hint-title{font-size:15px;font-weight:600;color:#334155;margin-bottom:6px}
.hint-sub{font-size:12px;line-height:1.8;color:var(--muted)}
.hint-steps{margin-top:14px;display:flex;align-items:center;justify-content:center;gap:6px;font-size:11.5px;color:#94a3b8}
.hint-steps i{font-style:normal;color:#cbd5e1}
.hint-steps span{background:#fff;border:1px solid var(--line);border-radius:20px;padding:4px 10px}

.wire-legend{
  position:absolute;left:12px;bottom:10px;display:flex;gap:13px;background:rgba(255,255,255,.9);
  border:1px solid var(--line);border-radius:8px;padding:5px 10px;font-size:11px;color:var(--muted);
  backdrop-filter:blur(4px);pointer-events:none;
}
.wire-legend i{display:inline-block;width:14px;height:3px;border-radius:2px;margin-right:4px;vertical-align:middle}

/* ---------- 元件 ---------- */
.comp{
  position:absolute;background:#fff;border:1px solid #dbe3ee;border-radius:11px;
  box-shadow:0 3px 10px rgba(15,23,42,.07);user-select:none;transition:box-shadow .15s,border-color .15s;
}
.comp:hover{border-color:#b9cbe4;box-shadow:0 6px 18px rgba(15,23,42,.1)}
.comp.selected{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.16),0 6px 18px rgba(15,23,42,.1)}
.comp.dragging{cursor:grabbing;box-shadow:0 12px 30px rgba(15,23,42,.2);z-index:20}
.comp-head{
  height:26px;display:flex;align-items:center;gap:6px;padding:0 8px;border-bottom:1px solid #eef2f8;
  font-size:11.5px;white-space:nowrap;overflow:hidden;
}
.comp-head .ci{font-size:12px}
.comp-head b{font-weight:600;color:#334155;overflow:hidden;text-overflow:ellipsis}
.comp-head em{font-style:normal;font-size:9.5px;color:var(--muted-2);margin-left:auto;background:#f8fafc;padding:1px 5px;border-radius:4px}
.comp-body{position:relative;height:calc(100% - 26px);border-radius:0 0 10px 10px}

.art{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;border-radius:0 0 10px 10px;overflow:hidden}
.art .a-emoji{font-size:30px;line-height:1;transition:.2s;filter:grayscale(.15)}
.art .a-label{font-size:9.5px;color:var(--muted-2);letter-spacing:.5px}
.art-board{background:linear-gradient(160deg,#134e4a,#0f2f2c);color:#a7f3d0}
.art-board .chip{width:56px;height:56px;border-radius:8px;background:linear-gradient(160deg,#1f2937,#0b1220);border:1px solid #334155;display:flex;align-items:center;justify-content:center;font-size:10px;color:#67e8f9;letter-spacing:1px;box-shadow:inset 0 0 18px rgba(103,232,249,.14)}
.art-board .board-tag{font-size:9px;color:#5eead4;opacity:.8;margin-top:6px}
.art-led .bulb{
  width:36px;height:36px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff8,#0000 60%);
  border:2px solid #cbd5e1;box-shadow:inset 0 0 10px rgba(0,0,0,.08);transition:.18s;
}
.art-led.on .bulb{box-shadow:0 0 18px 6px var(--led-color,#ef4444),inset 0 0 14px #fff;border-color:#fff}
.art-led.on .bulb::after{content:"";position:absolute;inset:0;border-radius:50%}
.art-buzzer.on .a-emoji{animation:shake .28s infinite}
.art-buzzer.on{color:#b91c1c}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-2px) rotate(-6deg)}75%{transform:translateX(2px) rotate(6deg)}}

/* 元件外观变体：电源 / 网络 / 工业 / 强电 / 识别 / 无源 / 屏幕 */
.art-power{background:linear-gradient(160deg,#f0fdf4,#dcfce7);border-radius:0 0 10px 10px}
.art-power .a-emoji{filter:none}
.art-power .a-label{color:#15803d;font-weight:600}
.art-net{background:linear-gradient(160deg,#eff6ff,#e0ecff);border-radius:0 0 10px 10px}
.art-net .a-label{color:#1d4ed8;font-weight:600}
.art-ind{background:linear-gradient(160deg,#f8fafc,#eef2f7);border-radius:0 0 10px 10px;box-shadow:inset 0 0 0 1px #e2e8f0}
.art-ind .a-label{color:#475569;font-weight:600}
.art-ac{background:repeating-linear-gradient(135deg,#fff5f5,#fff5f5 7px,#fee2e2 7px,#fee2e2 14px);border-radius:0 0 10px 10px}
.art-ac .a-label{color:#b91c1c;font-weight:600}
.art-rfid{background:linear-gradient(160deg,#faf5ff,#f3e8ff);border-radius:0 0 10px 10px}
.art-rfid .a-label{color:#7e22ce;font-weight:600}
.art-passive{background:repeating-linear-gradient(45deg,#f8fafc,#f8fafc 6px,#f1f5f9 6px,#f1f5f9 12px);border-radius:0 0 10px 10px}
.art-passive .a-emoji{opacity:.8;font-size:26px}
.art-passive .a-label{color:#94a3b8;font-size:8.5px}
.art-screen{background:linear-gradient(160deg,#111827,#0b1220);border-radius:0 0 10px 10px;justify-content:center;gap:4px}
.art-screen .scr{
  width:88%;padding:6px 8px;border-radius:4px;background:#000;color:#fbbf24;
  font-size:12px;letter-spacing:2px;text-align:center;overflow:hidden;white-space:nowrap;
  box-shadow:inset 0 0 14px rgba(251,191,36,.25);text-shadow:0 0 6px rgba(251,191,36,.8);
}
.art-screen .a-label{color:#94a3b8}
/* 新执行器运行状态 */
.art-fan.on .a-emoji{animation:spin 1.1s linear infinite}
.art-alarm.on .a-emoji{animation:shake .3s infinite}
.art-alarm.on{color:#dc2626}
.art-lock.on .a-emoji{transform:scale(1.15);color:#1d4ed8}
.art-curtain.on .a-emoji{transform:translateY(-3px);color:#1d4ed8}
@keyframes spin{to{transform:rotate(360deg)}}

.led-on-glow{position:absolute;inset:-10px;border-radius:50%;background:radial-gradient(circle,var(--led-color,#ef4444) 0%,transparent 65%);opacity:.35;pointer-events:none}

.comp-readout{
  position:absolute;right:6px;bottom:5px;font-size:10px;padding:1px 6px;border-radius:5px;
  background:#f1f5f9;color:#475569;font-variant-numeric:tabular-nums;pointer-events:none;max-width:90%;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.comp-readout.live{background:#ecfdf5;color:#15803d}
.comp-flag{position:absolute;left:6px;bottom:5px;font-size:9.5px;color:#b45309;background:#fffbeb;padding:1px 5px;border-radius:4px;pointer-events:none}

/* 引脚 */
.pin{
  position:absolute;width:13px;height:13px;border-radius:50%;background:#fff;border:2px solid #94a3b8;
  cursor:crosshair;z-index:6;transition:.12s;
}
.pin.power{border-color:#e5484d;background:#fff5f5}
.pin.gnd{border-color:#334155;background:#f1f5f9}
.pin.dio{border-color:#16a34a;background:#f0fdf4}
.pin.aio{border-color:#2563eb;background:#eff6ff}
.pin.bus{border-color:#ea580c;background:#fff7ed}
.pin.ac{border-color:#b91c1c;background:#fef2f2;border-width:2.5px}
.pin.ac::after{content:"";position:absolute;inset:2px;border-radius:50%;background:#b91c1c;opacity:.75}
.pin:hover{transform:scale(1.35);box-shadow:0 0 0 4px rgba(37,99,235,.14);z-index:9}
.pin.wired{background:#cbd5e1}
.pin-active{transform:scale(1.4);box-shadow:0 0 0 5px rgba(37,99,235,.2);z-index:9}
.pin-label{
  position:absolute;top:-1px;font-size:9px;color:#7b8794;white-space:nowrap;pointer-events:none;
  background:rgba(255,255,255,.85);padding:0 2px;border-radius:3px;line-height:11px;
}
.pin.side-l .pin-label{left:15px}
.pin.side-r .pin-label{right:15px;text-align:right}
.pin:hover .pin-label{color:var(--primary);font-weight:600;background:#eff6ff}

/* 导线 */
.wire{fill:none;stroke-width:3.2;stroke-linecap:round;pointer-events:stroke;cursor:pointer;transition:stroke-width .12s}
/* 白色描边垫底：导线贴着元件走过时边缘更清晰 */
.wire-halo{fill:none;stroke:#fff;stroke-width:8;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
.wire:hover{stroke-width:5}
.wire.selected{stroke-width:5;filter:drop-shadow(0 0 5px rgba(37,99,235,.6))}
.wire.bad{stroke-dasharray:7 5;animation:march 1s linear infinite}
@keyframes march{to{stroke-dashoffset:-24}}
.wire-temp{fill:none;stroke:#2563eb;stroke-width:2.4;stroke-dasharray:6 5;pointer-events:none}
/* 直角走线的可拖动拐点 */
.wire-grip{
  fill:#fff;stroke:#2563eb;stroke-width:2;cursor:ew-resize;pointer-events:all;
  filter:drop-shadow(0 1px 2px rgba(15,23,42,.3));transition:r .12s;
}
.wire-grip:hover{fill:#2563eb;stroke:#fff;r:6}

/* ================= 抽屉 ================= */
.drawer{background:#fff;border-top:1px solid var(--line);display:grid;grid-template-rows:36px auto;max-height:264px;transition:max-height .2s}
.drawer.collapsed{max-height:36px}
.drawer.collapsed .drawer-body{display:none}
.drawer.collapsed #btnDrawerToggle{transform:rotate(180deg)}
.drawer-bar{display:flex;align-items:center;padding:0 8px;border-bottom:1px solid var(--line-soft)}
.drawer-tabs{display:flex;gap:2px}
.dw-tab{border:0;background:transparent;font-size:12px;color:var(--muted);padding:0 11px;height:36px;cursor:pointer;border-bottom:2px solid transparent}
.dw-tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600;background:#f8fbff}
.drawer-bar .btn{margin-left:auto}
.drawer-body{overflow:auto;padding:10px 12px;height:228px}

/* 逻辑规则 */
.rule-list{display:flex;flex-direction:column;gap:7px}
.rule{
  display:flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:9px;padding:7px 10px;background:#fff;
}
.rule.disabled{opacity:.5}
.rule-idx{width:20px;height:20px;flex:none;border-radius:6px;background:var(--soft);color:var(--primary);font-size:11px;display:flex;align-items:center;justify-content:center;font-weight:600}
.rule-flow{flex:1;display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:12px;min-width:0}
.chip-when{background:#fff7ed;color:#c2410c;border:1px solid #fed7aa;border-radius:6px;padding:2px 8px;font-size:11.5px}
.chip-do{background:#eff6ff;color:#1d4ed8;border:1px solid #dbe7ff;border-radius:6px;padding:2px 8px;font-size:11.5px}
.chip-arrow{color:#cbd5e1}
.rule-ops{display:flex;gap:4px;flex:none}
.rule-empty{border:1px dashed var(--line);border-radius:10px;padding:18px;text-align:center;color:var(--muted-2);font-size:12px;line-height:1.9}
.rules-head{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.rules-head .t{font-weight:600;font-size:12.5px}
.rules-head .s{font-size:11px;color:var(--muted-2)}
.rules-head .btn{margin-left:auto}

/* 串口 */
.serial{font-family:"Consolas","Courier New",monospace;font-size:11.8px;line-height:1.75;background:#0f172a;border-radius:9px;padding:8px 10px;height:186px;overflow:auto;color:#cbd5e1}
.serial .ln{display:flex;gap:8px;white-space:pre-wrap;word-break:break-all}
.serial .ts{color:#64748b;flex:none}
.serial .t-info{color:#93c5fd}
.serial .t-ok{color:#86efac}
.serial .t-warn{color:#fcd34d}
.serial .t-err{color:#fca5a5}
.serial .t-mqtt{color:#c4b5fd}

/* 云端 */
.cloud{display:grid;grid-template-columns:230px 1fr;gap:12px;height:186px}
.cloud-left{display:flex;flex-direction:column;gap:7px;overflow:auto}
.cloud-stat{border:1px solid var(--line);border-radius:8px;padding:6px 9px;display:flex;align-items:center;gap:7px;font-size:11.5px}
.cloud-stat b{margin-left:auto;font-variant-numeric:tabular-nums;color:var(--primary);font-size:13px}
.cloud-stat .dot{width:7px;height:7px;border-radius:50%;background:#cbd5e1}
.cloud-stat .dot.on{background:var(--ok);box-shadow:0 0 0 3px rgba(22,163,74,.15)}
.chart-wrap{border:1px solid var(--line);border-radius:9px;position:relative;background:#fff;overflow:hidden}
#chart{width:100%;height:100%;display:block}
.cloud-cmd{display:flex;gap:6px;flex-wrap:wrap;margin-top:2px}
.cloud-msg{grid-column:1/-1;font-size:11px;color:var(--muted);display:flex;gap:8px;align-items:center;overflow:hidden}

/* 环境 */
.env{display:grid;grid-template-columns:repeat(3,1fr);gap:10px 16px}
.env-item{background:#fff;border:1px solid var(--line);border-radius:9px;padding:7px 10px}
.env-item .ev-top{display:flex;justify-content:space-between;font-size:11.5px;margin-bottom:3px}
.env-item .ev-top b{color:var(--primary);font-variant-numeric:tabular-nums}
.env-item input[type=range]{width:100%;height:4px;accent-color:#2563eb;cursor:pointer}
.env-toggle{display:flex;align-items:center;gap:8px;font-size:12px}
.switch{position:relative;width:38px;height:20px;border-radius:20px;background:#cbd5e1;cursor:pointer;transition:.2s;flex:none}
.switch::after{content:"";position:absolute;width:16px;height:16px;border-radius:50%;background:#fff;top:2px;left:2px;transition:.2s}
.switch.on{background:var(--ok)}
.switch.on::after{left:20px}

/* ================= 右侧 ================= */
.panel-right{background:#fff;border-left:1px solid var(--line);overflow-y:auto;padding:12px}
.pr-title{font-size:12px;font-weight:600;color:#334155;display:flex;align-items:center;gap:6px;margin:0 0 9px}
.pr-title::before{content:"";width:3px;height:12px;border-radius:2px;background:var(--primary)}
.pr-block{border:1px solid var(--line);border-radius:10px;padding:10px;margin-bottom:10px}
.kv{display:flex;justify-content:space-between;font-size:11.5px;padding:4px 0;color:var(--muted)}
.kv b{color:#334155;font-weight:600}
.prop-row{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.prop-row label{font-size:11.5px;color:var(--muted);width:58px;flex:none}
.prop-row input,.prop-row select{height:28px;font-size:12px;padding:0 6px}
.teach-list{margin:0;padding-left:15px;font-size:11.5px;line-height:1.85;color:#475569}
.teach-list li::marker{color:#94a3b8}
.voltagetag{display:inline-block;font-size:10.5px;background:#fef3c7;color:#b45309;padding:1px 6px;border-radius:4px;margin-left:4px}
.notice{background:#fffbeb;border:1px solid #fde68a;color:#92400e;border-radius:9px;padding:8px 10px;font-size:11.5px;line-height:1.7}
.notice.blue{background:#eff6ff;border-color:#dbe7ff;color:#1e40af}
.empty-center{text-align:center;color:var(--muted-2);font-size:12px;padding:28px 8px;line-height:1.9}
.empty-center .e-ico{font-size:26px;opacity:.6;display:block;margin-bottom:6px}

/* ================= 教师端 ================= */
.teacher-view{position:absolute;inset:54px 0 0 0;background:var(--bg);overflow:auto;padding:16px;z-index:25}
.tv-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.tv-head h2{font-size:16px;margin:0}
.tv-head .s{font-size:12px;color:var(--muted)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:14px}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.stat-card .sv{font-size:22px;font-weight:700;letter-spacing:-.5px}
.stat-card .sl{font-size:11.5px;color:var(--muted);margin-top:2px}
.stat-card .si{float:right;font-size:19px;opacity:.5}
.tv-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.card-head{display:flex;align-items:center;gap:8px;padding:10px 13px;border-bottom:1px solid var(--line-soft);font-weight:600;font-size:12.5px}
.card-head .btn{margin-left:auto}
.card-body{padding:12px 13px;max-height:340px;overflow:auto}
.tbl{width:100%;border-collapse:collapse;font-size:12px}
.tbl th{text-align:left;font-weight:600;color:var(--muted);font-size:11px;padding:6px 8px;background:#f8fafc;position:sticky;top:0}
.tbl td{padding:7px 8px;border-bottom:1px solid #f1f5f9}
.tbl tr:hover td{background:#fafcff}
.score{font-weight:700;color:var(--primary)}
.score.low{color:var(--err)}
.score.mid{color:var(--warn)}
.form-grid{display:grid;gap:8px}
.form-grid label{font-size:11.5px;color:var(--muted);display:block;margin-bottom:3px}
.form-grid input,.form-grid textarea,.form-grid select{width:100%}
.hint-tiny{font-size:11px;color:var(--muted-2);line-height:1.7}

/* ================= 管理中心（管理员） ================= */
.role-tag{font-size:10.5px;padding:1px 6px;border-radius:5px;background:#e8f0fe;color:#1d4ed8}
.role-tag.teacher{background:#fef3c7;color:#b45309}
.role-tag.admin{background:#ede9fe;color:#6d28d9}
.tbl input.pn-input{height:27px;font-size:11.5px;padding:0 6px;border:1px solid var(--line);border-radius:6px;width:100%;background:#fff}
.tbl input.pn-input:focus{border-color:var(--primary);outline:0;box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.tbl input.pn-input.changed{border-color:#fdba74;background:#fffbf5}
.pn-row-custom td:first-child::after{content:"✎";font-size:9px;color:#b45309}

/* 密码框显示 / 隐藏 */
.pwd-box{position:relative}
.pwd-box input{padding-right:34px}
.pwd-eye{
  position:absolute;right:7px;top:50%;transform:translateY(-50%);
  border:0;background:transparent;cursor:pointer;font-size:13px;line-height:1;
  color:#94a3b8;padding:2px 4px;border-radius:5px;
}
.pwd-eye:hover{color:var(--primary);background:#eef4ff}

/* ================= 弹窗 ================= */
.modal-mask{position:fixed;inset:0;background:rgba(15,23,42,.42);display:flex;align-items:center;justify-content:center;z-index:200;backdrop-filter:blur(2px)}
.modal{
  background:#fff;border-radius:14px;width:520px;max-width:calc(100vw - 40px);max-height:calc(100vh - 80px);
  display:flex;flex-direction:column;box-shadow:var(--shadow-lg);animation:pop .16s ease-out;
}
@keyframes pop{from{transform:scale(.97);opacity:0}to{transform:scale(1);opacity:1}}
.modal-head{display:flex;align-items:center;padding:14px 16px;border-bottom:1px solid var(--line-soft);font-weight:600;font-size:13.5px}
.modal-head .x{margin-left:auto;border:0;background:transparent;font-size:16px;color:var(--muted);cursor:pointer;line-height:1}
.modal-body{padding:14px 16px;overflow:auto;font-size:12.5px;line-height:1.75}
.modal-foot{padding:11px 16px;border-top:1px solid var(--line-soft);display:flex;justify-content:flex-end;gap:8px}
.modal.wide{width:680px}
.modal-row{display:flex;align-items:center;gap:8px;margin-bottom:9px}
.modal-row>label{width:70px;flex:none;font-size:12px;color:var(--muted)}
.modal-row .sel,.modal-row input{flex:1}
.act-row{display:grid;grid-template-columns:96px 1fr 1fr 26px;gap:6px;margin-bottom:6px;align-items:center}
.act-row .sel,.act-row input{height:28px;font-size:12px;width:100%}
.act-del{width:26px;height:26px;border-radius:6px;border:1px solid var(--line);background:#fff;color:var(--err);cursor:pointer}
.sec-label{font-size:11px;color:var(--muted-2);margin:12px 0 6px;letter-spacing:.5px}
.err-list{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;border-radius:9px;padding:9px 12px;font-size:12px;line-height:1.9;margin-bottom:8px}
.warn-list{background:#fffbeb;border:1px solid #fde68a;color:#92400e;border-radius:9px;padding:9px 12px;font-size:12px;line-height:1.9;margin-bottom:8px}
.ok-list{background:#f0fdf4;border:1px solid #bbf7d0;color:#166534;border-radius:9px;padding:9px 12px;font-size:12px;line-height:1.9}

/* toast */
.toast-root{position:fixed;top:66px;left:50%;transform:translateX(-50%);z-index:300;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{
  background:#0f172a;color:#fff;font-size:12.5px;padding:8px 15px;border-radius:9px;
  box-shadow:0 10px 26px rgba(15,23,42,.24);animation:tin .18s ease-out;max-width:440px;
}
.toast.err{background:#b91c1c}
.toast.ok{background:#15803d}
.toast.warn{background:#b45309}
@keyframes tin{from{transform:translateY(-8px);opacity:0}to{transform:none;opacity:1}}

/* ================= 闯关模式 ================= */
.tag-warn{
  display:inline-block;margin-left:6px;padding:1px 5px;border-radius:4px;font-size:10px;font-weight:600;
  background:#fff7ed;border:1px solid #fed7aa;color:#c2410c;vertical-align:middle;
}
.lv-head{padding:4px 2px 10px}
.lv-prog{font-size:11.5px;color:var(--muted);margin-bottom:6px}
.lv-prog b{color:var(--primary);font-size:13px}
.lv-bar{height:6px;background:#e8eef7;border-radius:6px;overflow:hidden}
.lv-bar i{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,#60a5fa,#2563eb);transition:width .3s}

.lv-card{
  display:flex;gap:9px;align-items:flex-start;padding:10px;margin-bottom:8px;
  border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;transition:.15s;
}
.lv-card:hover{border-color:#bfd3ee;box-shadow:0 4px 14px rgba(37,99,235,.08)}
.lv-card.current{border-color:var(--primary);background:#f5f9ff;box-shadow:0 0 0 2px rgba(37,99,235,.12)}
.lv-card.done .lv-no{background:#dcfce7;border-color:#86efac;color:#15803d}
.lv-card.locked{opacity:.6;cursor:not-allowed}
.lv-card.locked:hover{border-color:var(--line);box-shadow:none}
.lv-no{
  flex:none;width:24px;height:24px;border-radius:8px;background:#f1f5f9;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:11.5px;font-weight:600;color:#475569;
}
.lv-main{flex:1;min-width:0}
.lv-title{display:flex;align-items:center;gap:4px;font-size:12.5px;font-weight:600;color:#1e293b;line-height:1.45}
.lv-title>span:first-child{font-size:13px;flex:none}
.lv-stars{margin-left:auto;flex:none;font-size:10px;color:#f59e0b;letter-spacing:-1px}
.lv-brief{font-size:11px;color:var(--muted);line-height:1.6;margin-top:3px}
.lv-lock{font-size:10.5px;color:var(--muted-2);margin-top:3px}
.lv-ops{flex:none;display:flex;flex-direction:column;gap:4px}
.lv-ops .btn{height:24px;padding:0 8px;font-size:11px}
.lv-ops .btn:empty{display:none}

/* ================= 万用表 ================= */#btnMeter.active{background:var(--soft);border-color:#93c5fd;color:var(--primary-d);box-shadow:inset 0 0 0 1px rgba(37,99,235,.16)}
.meter-panel{
  position:absolute;left:12px;bottom:50px;width:250px;z-index:60;overflow:hidden;
  background:rgba(255,255,255,.97);border:1px solid #cfdcee;border-radius:12px;
  box-shadow:0 14px 34px rgba(15,23,42,.18);backdrop-filter:blur(6px);animation:pop .16s ease-out;
}
.meter-head{display:flex;align-items:center;gap:6px;padding:7px 9px;background:linear-gradient(90deg,#0f172a,#1e293b);color:#e2e8f0;font-size:11.5px}
.meter-title{font-weight:600}
.meter-mode{margin-left:auto;font-size:10px;background:rgba(255,255,255,.14);padding:2px 6px;border-radius:5px;color:#cbd5e1}
.meter-x{border:0;background:transparent;color:#94a3b8;cursor:pointer;font-size:12px;line-height:1;padding:0 2px}
.meter-x:hover{color:#fff}
.meter-body{padding:10px}
.meter-big{
  display:flex;align-items:baseline;gap:5px;justify-content:flex-end;
  background:#0b1220;border-radius:8px;padding:7px 10px;
  font-family:"Consolas",ui-monospace,monospace;
}
.meter-big b{font-size:23px;line-height:1.1;color:#67e8f9;font-weight:600;letter-spacing:1px}
.meter-big i{font-style:normal;font-size:12px;color:#64748b}
.meter-big.ok b{color:#4ade80}
.meter-big.bad b{color:#f87171}
.meter-big.warn b{color:#fbbf24}
.meter-note{font-size:11px;color:#475569;line-height:1.75;margin-top:8px;min-height:38px}
.meter-tip{font-size:10.5px;color:var(--muted-2);line-height:1.6;margin-top:3px}
.meter-hist{list-style:none;margin:8px 0 0;padding:7px 0 0;border-top:1px dashed var(--line);max-height:104px;overflow:auto}
.meter-hist li{display:flex;gap:8px;font-size:10.5px;color:var(--muted);padding:2px 0}
.meter-hist li span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.meter-hist li b{flex:none;font-weight:600;color:#334155}
.meter-hist li.ok b{color:var(--ok)}
.meter-hist li.bad b{color:var(--err)}
.meter-hist li.warn b{color:var(--warn)}

#viewport.meter-on .wire,#viewport.meter-on .pin{cursor:crosshair}
.wire.probe-ok{stroke:#16a34a !important;stroke-width:6;filter:drop-shadow(0 0 7px rgba(22,163,74,.7));animation:pulseW .5s 2}
.wire.probe-bad{stroke:#dc2626 !important;stroke-width:6;filter:drop-shadow(0 0 7px rgba(220,38,38,.7));animation:pulseW .5s 2}
@keyframes pulseW{50%{opacity:.3}}
.pin.probe-ok{box-shadow:0 0 0 4px rgba(22,163,74,.3) !important}
.pin.probe-bad{box-shadow:0 0 0 4px rgba(220,38,38,.32) !important}

/* 打印 */
@media print{
  body{overflow:visible;background:#fff}
  .topbar,.panel-left,.panel-right,.stage-toolbar,.drawer,.wire-legend,.canvas-hint,.meter-panel{display:none !important}
  .app-shell{display:block;height:auto}
  .workspace{display:block}
}
@media (max-width:1200px){
  .workspace{grid-template-columns:200px minmax(0,1fr) 250px}
  .pal-grid{grid-template-columns:1fr}
}

/* 第九轮：班级学情进度条 */
.pg-bar{height:7px;border-radius:4px;background:#e8eef7;overflow:hidden;margin-bottom:3px}
.pg-fill{height:100%;border-radius:4px;background:var(--primary);transition:width .3s}