/* ============================================================
   WorkBuddy 班主任全能工作台 · 设计系统
   蓝色教育风 / 卡片式 / 清爽专业 / 深色模式
   ============================================================ */

:root{
  --brand:#2563eb;  --brand-600:#1d4ed8; --brand-700:#1e40af;
  --brand-050:#eff6ff; --brand-100:#dbeafe; --brand-200:#bfdbfe; --brand-300:#93c5fd;
  --ok:#16a34a;  --ok-bg:#ecfdf5;
  --warn:#f59e0b; --warn-bg:#fffbeb;
  --danger:#dc2626; --danger-bg:#fef2f2;
  --info:#0891b2; --info-bg:#ecfeff;
  --purple:#7c3aed; --purple-bg:#f5f3ff;
  --pink:#db2777;

  --bg:#f2f6fb; --surface:#ffffff; --surface-2:#f8fafc; --surface-3:#f1f5f9;
  --border:#e3e9f2; --border-strong:#cbd5e1;
  --text:#0f172a; --text-2:#4b5a70; --text-3:#90a0b6;

  --shadow-1:0 1px 2px rgba(15,23,42,.05);
  --shadow-2:0 1px 3px rgba(15,23,42,.07), 0 6px 18px rgba(15,23,42,.06);
  --shadow-3:0 12px 40px rgba(15,23,42,.16);
  --radius:14px; --radius-sm:10px; --radius-lg:20px;

  --sidebar-w:238px; --topbar-h:58px;
  --font: "PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
}

[data-theme="dark"]{
  --brand:#60a5fa; --brand-600:#3b82f6; --brand-700:#93c5fd;
  --brand-050:#14243c; --brand-100:#1b3352; --brand-200:#24456e; --brand-300:#2f5c92;
  --ok:#34d399; --ok-bg:#0c2b22;
  --warn:#fbbf24; --warn-bg:#2e2410;
  --danger:#f87171; --danger-bg:#33181a;
  --info:#22d3ee; --info-bg:#0b2b31;
  --purple:#a78bfa; --purple-bg:#231a3d;
  --pink:#f472b6;

  --bg:#0a111f; --surface:#111a2c; --surface-2:#16223a; --surface-3:#1c2a44;
  --border:#22314c; --border-strong:#31456a;
  --text:#e8eefb; --text-2:#a7b6ce; --text-3:#7488a6;

  --shadow-1:0 1px 2px rgba(0,0,0,.4);
  --shadow-2:0 2px 8px rgba(0,0,0,.35), 0 10px 28px rgba(0,0,0,.3);
  --shadow-3:0 18px 50px rgba(0,0,0,.55);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font-family:var(--font); background:var(--bg); color:var(--text);
  font-size:14px; line-height:1.6; -webkit-font-smoothing:antialiased;
  overflow:hidden;
}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:9px}
::-webkit-scrollbar-thumb:hover{background:var(--text-3)}
::-webkit-scrollbar-track{background:transparent}

.ico{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.ico-sm{width:16px;height:16px}
.ico-lg{width:24px;height:24px}

/* ---------------- 布局 ---------------- */
.app{display:grid;grid-template-columns:var(--sidebar-w) 1fr;grid-template-rows:var(--topbar-h) 1fr;
  grid-template-areas:"top top" "side main";height:100vh;height:100dvh;transition:grid-template-columns .22s ease}
.app.collapsed{grid-template-columns:66px 1fr}

.topbar{grid-area:top;display:flex;align-items:center;gap:10px;padding:0 14px;
  background:var(--surface);border-bottom:1px solid var(--border);z-index:60;position:relative}
.sidebar{grid-area:side;background:var(--surface);border-right:1px solid var(--border);
  overflow-y:auto;overflow-x:hidden;display:flex;flex-direction:column;justify-content:space-between;padding:10px 8px 0}
.main{grid-area:main;overflow-y:auto;overflow-x:hidden;scroll-behavior:smooth}
.page{padding:18px 20px 60px;max-width:1560px;margin:0 auto}

/* ---------------- 顶栏 ---------------- */
.icon-btn{width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid transparent;background:transparent;border-radius:10px;cursor:pointer;color:var(--text-2);position:relative;flex:none}
.icon-btn:hover{background:var(--surface-3);color:var(--text)}
.icon-btn.active{background:var(--brand-050);color:var(--brand);border-color:var(--brand-100)}

.brand{display:flex;align-items:center;gap:10px;min-width:0;cursor:pointer;padding:4px 6px;border-radius:10px}
.brand:hover{background:var(--surface-3)}
.brand-logo{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--brand),#38bdf8);
  color:#fff;display:grid;place-items:center;font-weight:800;font-size:16px;flex:none;box-shadow:var(--shadow-1)}
.brand-text{min-width:0}
.brand-title{font-weight:700;font-size:14.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-sub{font-size:11.5px;color:var(--text-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:-2px}

.topbar-search{position:relative;flex:1;max-width:440px;margin-left:6px}
.topbar-search > .ico{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--text-3);pointer-events:none}
.topbar-search input{width:100%;height:36px;border:1px solid var(--border);background:var(--surface-2);
  border-radius:10px;padding:0 34px 0 34px;outline:none;transition:.15s}
.topbar-search input:focus{border-color:var(--brand);background:var(--surface);box-shadow:0 0 0 3px var(--brand-050)}
.search-panel{position:absolute;top:42px;left:0;right:0;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow-3);max-height:min(60vh,460px);overflow:auto;padding:6px;z-index:70}
.search-group-title{font-size:11px;color:var(--text-3);padding:8px 10px 4px;font-weight:700;letter-spacing:.5px}
.search-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:9px;cursor:pointer}
.search-item:hover,.search-item.sel{background:var(--brand-050)}
.search-item .si-t{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.search-item .si-s{font-size:11.5px;color:var(--text-3);flex:none}

.topbar-actions{display:flex;align-items:center;gap:4px;margin-left:auto}
.avatar{width:32px;height:32px;border-radius:50%;border:none;cursor:pointer;background:linear-gradient(135deg,#38bdf8,var(--brand));
  color:#fff;font-weight:700;font-size:13px;flex:none}
.badge-dot{position:absolute;top:6px;right:7px;width:8px;height:8px;border-radius:50%;background:var(--danger);
  border:2px solid var(--surface);animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.25)}}

.dd-wrap{position:relative}
.dropdown{position:absolute;right:0;top:42px;width:330px;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow-3);z-index:80;padding:8px;max-height:70vh;overflow:auto}
.dropdown h4{margin:6px 8px;font-size:12px;color:var(--text-3)}
.dd-item{display:flex;gap:10px;padding:9px 10px;border-radius:9px;cursor:pointer;align-items:flex-start}
.dd-item:hover{background:var(--surface-3)}
.dd-item .t{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dd-item .s{font-size:11.5px;color:var(--text-3)}

/* ---------------- 侧栏 ---------------- */
.nav{display:flex;flex-direction:column;gap:2px}
.nav-group{font-size:11px;color:var(--text-3);padding:12px 12px 4px;font-weight:700;letter-spacing:1px;white-space:nowrap}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:10px;cursor:pointer;
  color:var(--text-2);white-space:nowrap;position:relative;transition:.15s}
.nav-item:hover{background:var(--surface-3);color:var(--text)}
.nav-item.active{background:var(--brand-050);color:var(--brand);font-weight:600}
.nav-item.active::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:var(--brand)}
.nav-item .ico{flex:none}
.nav-item .txt{overflow:hidden;text-overflow:ellipsis}
.nav-item .tag{margin-left:auto;font-size:10.5px;background:var(--danger);color:#fff;border-radius:20px;padding:0 6px;line-height:16px;font-weight:700}
.app.collapsed .nav-group{text-align:center;font-size:9px;padding:12px 4px 4px;letter-spacing:0}
.app.collapsed .nav-item{justify-content:center;padding:10px 0}
.app.collapsed .nav-item .txt,.app.collapsed .brand-text,.app.collapsed .storage-box{display:none}
.app.collapsed .nav-item .tag{position:absolute;top:2px;right:6px;margin:0}
.sidebar-foot{padding:10px 8px}
.storage-box{font-size:11px;color:var(--text-3);background:var(--surface-2);border:1px solid var(--border);
  border-radius:10px;padding:8px 10px}
.storage-bar{height:5px;border-radius:5px;background:var(--surface-3);overflow:hidden;margin-top:6px}
.storage-bar > i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),#38bdf8);border-radius:5px}
.sidebar-mask{display:none;position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:55;backdrop-filter:blur(2px)}

/* ---------------- 页面头部 ---------------- */
.page-head{display:flex;align-items:flex-end;gap:14px;flex-wrap:wrap;margin-bottom:16px}
.page-head .ph-ico{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;flex:none;
  background:var(--brand-050);color:var(--brand);border:1px solid var(--brand-100)}
.page-head h1{margin:0;font-size:20px;font-weight:750;letter-spacing:-.2px}
.page-head p{margin:2px 0 0;color:var(--text-3);font-size:12.5px}
.page-head .ph-actions{margin-left:auto;display:flex;gap:8px;flex-wrap:wrap}

/* ---------------- 卡片 / 网格 ---------------- */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-1);overflow:hidden}
.card + .card{margin-top:14px}
.card-head{display:flex;align-items:center;gap:10px;padding:13px 16px;border-bottom:1px solid var(--border);flex-wrap:wrap}
.card-head h3{margin:0;font-size:14.5px;font-weight:700;display:flex;align-items:center;gap:8px}
.card-head .ch-actions{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
.card-body{padding:16px}
.card-body.tight{padding:8px}
.card-foot{padding:11px 16px;border-top:1px solid var(--border);background:var(--surface-2);font-size:12px;color:var(--text-2)}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.g-auto{grid-template-columns:repeat(auto-fill,minmax(270px,1fr))}
.g-stat{grid-template-columns:repeat(auto-fill,minmax(172px,1fr))}

/* ---------------- 统计卡 ---------------- */
.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px 15px;
  box-shadow:var(--shadow-1);position:relative;overflow:hidden;transition:.18s;cursor:default}
.stat:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.stat .st-ico{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;margin-bottom:9px}
.stat .st-label{font-size:12px;color:var(--text-3);font-weight:600}
.stat .st-value{font-size:25px;font-weight:800;letter-spacing:-.5px;line-height:1.25;margin-top:1px}
.stat .st-hint{font-size:11.5px;color:var(--text-3);margin-top:2px}
.stat .st-spark{position:absolute;right:10px;bottom:8px;opacity:.5}

/* ---------------- 按钮 ---------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:34px;padding:0 13px;
  border-radius:9px;border:1px solid var(--border);background:var(--surface);color:var(--text-2);
  cursor:pointer;font-weight:600;font-size:13px;transition:.15s;white-space:nowrap}
.btn:hover{background:var(--surface-3);color:var(--text)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 2px 8px rgba(37,99,235,.25)}
.btn-primary:hover{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.btn-ghost{background:transparent}
.btn-danger{color:var(--danger);border-color:var(--danger);background:transparent}
.btn-danger:hover{background:var(--danger-bg);color:var(--danger)}
.btn-sm{height:28px;padding:0 9px;font-size:12px;border-radius:8px}
.btn-lg{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn-icon{width:30px;height:30px;padding:0;border-radius:8px}
.btn-group{display:inline-flex;gap:0;border:1px solid var(--border);border-radius:9px;overflow:hidden}
.btn-group .btn{border:none;border-radius:0;border-right:1px solid var(--border);height:30px}
.btn-group .btn:last-child{border-right:none}
.btn-group .btn.on{background:var(--brand-050);color:var(--brand);font-weight:700}

/* ---------------- 表单 ---------------- */
.field{margin-bottom:14px}
.field > label{display:block;font-size:12.5px;font-weight:700;color:var(--text-2);margin-bottom:5px}
.field .hint{font-size:11.5px;color:var(--text-3);margin-top:4px;font-weight:400}
.req{color:var(--danger);margin-left:2px}
.input,.select,.textarea{width:100%;border:1px solid var(--border);background:var(--surface-2);border-radius:9px;
  padding:8px 11px;outline:none;transition:.15s;min-height:36px}
.input:focus,.select:focus,.textarea:focus{border-color:var(--brand);background:var(--surface);box-shadow:0 0 0 3px var(--brand-050)}
.textarea{min-height:92px;resize:vertical;line-height:1.65}
.select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-3) 50%),linear-gradient(135deg,var(--text-3) 50%,transparent 50%);
  background-position:calc(100% - 16px) 16px,calc(100% - 11px) 16px;background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:30px}
.row{display:grid;gap:12px}
.row2{grid-template-columns:1fr 1fr}
.row3{grid-template-columns:1fr 1fr 1fr}
.row4{grid-template-columns:repeat(4,1fr)}
.switch{display:inline-flex;align-items:center;gap:8px;cursor:pointer;user-select:none}
.switch input{display:none}
.switch i{width:38px;height:21px;border-radius:20px;background:var(--border-strong);position:relative;transition:.2s;flex:none}
.switch i::after{content:"";position:absolute;top:2.5px;left:2.5px;width:16px;height:16px;border-radius:50%;background:#fff;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.3)}
.switch input:checked + i{background:var(--brand)}
.switch input:checked + i::after{transform:translateX(17px)}
.chk{display:inline-flex;align-items:center;gap:7px;cursor:pointer}
.chk input{width:16px;height:16px;accent-color:var(--brand)}

.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600;
  background:var(--surface-3);color:var(--text-2);border:1px solid transparent;white-space:nowrap}
.chip.brand{background:var(--brand-050);color:var(--brand);border-color:var(--brand-100)}
.chip.ok{background:var(--ok-bg);color:var(--ok)}
.chip.warn{background:var(--warn-bg);color:var(--warn)}
.chip.danger{background:var(--danger-bg);color:var(--danger)}
.chip.info{background:var(--info-bg);color:var(--info)}
.chip.purple{background:var(--purple-bg);color:var(--purple)}
.chip.sel{background:var(--brand);color:#fff;border-color:var(--brand)}
.chip.pick{cursor:pointer;user-select:none}
.chip .x{cursor:pointer;opacity:.6}
.chip .x:hover{opacity:1}

/* ---------------- 表格 ---------------- */
.table-wrap{overflow:auto;max-width:100%}
table.tb{width:100%;border-collapse:collapse;font-size:13px}
table.tb th{position:sticky;top:0;background:var(--surface-2);text-align:left;padding:9px 11px;font-size:11.5px;
  color:var(--text-3);font-weight:700;white-space:nowrap;border-bottom:1px solid var(--border);z-index:2;letter-spacing:.3px}
table.tb td{padding:9px 11px;border-bottom:1px solid var(--border);vertical-align:middle}
table.tb tbody tr:hover{background:var(--surface-2)}
table.tb tbody tr:last-child td{border-bottom:none}
table.tb .num{font-variant-numeric:tabular-nums;text-align:right}
table.tb .ctr{text-align:center}
.tb-empty{padding:44px 16px;text-align:center;color:var(--text-3)}
.tb-empty .ico{width:38px;height:38px;opacity:.4;margin-bottom:8px}

/* ---------------- 徽章 / 标签 / 进度 ---------------- */
.tag{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:6px;font-size:11.5px;font-weight:700;line-height:18px}
.tag.gray{background:var(--surface-3);color:var(--text-2)}
.tag.brand{background:var(--brand-050);color:var(--brand)}
.tag.ok{background:var(--ok-bg);color:var(--ok)}
.tag.warn{background:var(--warn-bg);color:var(--warn)}
.tag.danger{background:var(--danger-bg);color:var(--danger)}
.tag.purple{background:var(--purple-bg);color:var(--purple)}
.tag.info{background:var(--info-bg);color:var(--info)}
.dot{width:7px;height:7px;border-radius:50%;display:inline-block;flex:none}
.progress{height:7px;border-radius:7px;background:var(--surface-3);overflow:hidden;min-width:60px}
.progress > i{display:block;height:100%;border-radius:7px;background:linear-gradient(90deg,var(--brand),#38bdf8);transition:width .4s}
.progress.ok > i{background:linear-gradient(90deg,#22c55e,#4ade80)}
.progress.warn > i{background:linear-gradient(90deg,#f59e0b,#fbbf24)}
.progress.danger > i{background:linear-gradient(90deg,#dc2626,#f87171)}

/* ---------------- Tab / Seg ---------------- */
.tabs{display:flex;gap:2px;border-bottom:1px solid var(--border);overflow-x:auto;padding:0 4px}
.tabs .tab{padding:9px 14px;cursor:pointer;color:var(--text-2);font-weight:600;font-size:13px;white-space:nowrap;
  border-bottom:2px solid transparent;margin-bottom:-1px;transition:.15s}
.tabs .tab:hover{color:var(--text)}
.tabs .tab.on{color:var(--brand);border-bottom-color:var(--brand)}
.seg{display:inline-flex;background:var(--surface-3);border-radius:10px;padding:3px;gap:2px;flex-wrap:wrap}
.seg .s{padding:5px 12px;border-radius:8px;cursor:pointer;font-size:12.5px;font-weight:600;color:var(--text-2);white-space:nowrap}
.seg .s.on{background:var(--surface);color:var(--brand);box-shadow:var(--shadow-1)}

/* ---------------- 弹窗 ---------------- */
.modal-root{position:fixed;inset:0;z-index:200;display:none}
.modal-root.on{display:block}
/* 遮罩必须在弹窗之下：z-index 显式声明，避免 DOM 顺序变化再次踩坑 */
.modal-mask{position:absolute;inset:0;z-index:1;background:rgba(15,23,42,.45);backdrop-filter:blur(2px);animation:fade .16s}
.modal{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:2;width:min(660px,94vw);
  max-height:90vh;background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-3);
  display:flex;flex-direction:column;animation:pop .18s;overflow:hidden}
.modal.wide{width:min(980px,96vw)}
.modal.narrow{width:min(440px,94vw)}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:translate(-50%,-46%) scale(.97)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}
.modal-head{display:flex;align-items:center;gap:10px;padding:15px 18px;border-bottom:1px solid var(--border)}
.modal-head h3{margin:0;font-size:16px;font-weight:750;flex:1}
.modal-body{padding:18px;overflow:auto;flex:1}
.modal-foot{display:flex;gap:9px;justify-content:flex-end;padding:13px 18px;border-top:1px solid var(--border);background:var(--surface-2)}

/* ---------------- Toast ---------------- */
.toast-root{position:fixed;top:70px;right:16px;z-index:300;display:flex;flex-direction:column;gap:9px;pointer-events:none}
.toast{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--brand);border-radius:11px;
  box-shadow:var(--shadow-3);padding:11px 15px;min-width:220px;max-width:360px;display:flex;gap:10px;align-items:flex-start;
  animation:slidein .22s;pointer-events:auto;font-size:13px}
@keyframes slidein{from{opacity:0;transform:translateX(30px)}to{opacity:1;transform:none}}
.toast.ok{border-left-color:var(--ok)} .toast.warn{border-left-color:var(--warn)}
.toast.err{border-left-color:var(--danger)} .toast.info{border-left-color:var(--info)}
.toast .ico{flex:none;margin-top:1px}

/* ---------------- 通用小组件 ---------------- */
.empty{text-align:center;padding:40px 20px;color:var(--text-3)}
.empty .ico{width:44px;height:44px;opacity:.35;margin-bottom:10px}
.hr{height:1px;background:var(--border);margin:14px 0}
.muted{color:var(--text-3)}
.small{font-size:12px}
.b{font-weight:700}
.nowrap{white-space:nowrap}
.mono{font-variant-numeric:tabular-nums}
.flex{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.flex-col{display:flex;flex-direction:column;gap:8px}
.spacer{flex:1}
.txt-r{text-align:right}
.w-full{width:100%}
.mt0{margin-top:0}.mt8{margin-top:8px}.mt14{margin-top:14px}.mb8{margin-bottom:8px}.mb14{margin-bottom:14px}
.scroll-x{overflow-x:auto}
.list-item{display:flex;gap:11px;padding:11px 14px;border-bottom:1px solid var(--border);align-items:flex-start}
.list-item:last-child{border-bottom:none}
.list-item:hover{background:var(--surface-2)}
.li-body{flex:1;min-width:0}
.li-title{font-weight:650;overflow:hidden;text-overflow:ellipsis}
.li-sub{font-size:11.5px;color:var(--text-3);margin-top:2px}
.li-actions{display:flex;gap:4px;flex:none;opacity:.55;transition:.15s}
.list-item:hover .li-actions{opacity:1}

/* ---------------- 四象限 ---------------- */
.quad-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.quad{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);display:flex;flex-direction:column;min-height:200px;overflow:hidden}
.quad > h4{margin:0;padding:10px 13px;font-size:13px;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--border)}
.quad > h4 .n{margin-left:auto;font-size:11px;color:var(--text-3);font-weight:700}
.quad-body{padding:8px;display:flex;flex-direction:column;gap:7px;overflow:auto;flex:1;max-height:340px}
.q1 > h4{background:var(--danger-bg);color:var(--danger)}
.q2 > h4{background:var(--brand-050);color:var(--brand)}
.q3 > h4{background:var(--warn-bg);color:var(--warn)}
.q4 > h4{background:var(--surface-3);color:var(--text-2)}
.todo-item{display:flex;gap:9px;align-items:flex-start;padding:9px 10px;border:1px solid var(--border);
  border-radius:10px;background:var(--surface-2);cursor:pointer;transition:.15s}
.todo-item:hover{border-color:var(--brand-200);box-shadow:var(--shadow-1)}
.todo-item.done{opacity:.5}
.todo-item.done .ti-title{text-decoration:line-through}

/* ---------------- 课表 ---------------- */
.tt-wrap{overflow:auto}
table.tt{border-collapse:separate;border-spacing:5px;width:100%;min-width:900px}
table.tt th{padding:8px 4px;font-size:11.5px;color:var(--text-2);font-weight:700}
table.tt th.today{color:var(--brand)}
table.tt td{padding:0}
.tt-time{width:104px;text-align:center;vertical-align:middle;font-size:11px;color:var(--text-3);background:var(--surface-2);border-radius:9px;padding:6px 4px}
.tt-time .pn{font-weight:700;color:var(--text-2);font-size:12px}
.tt-cell{border-radius:10px;padding:7px 8px;min-height:56px;font-size:12px;cursor:pointer;border:1px solid var(--border);
  background:var(--surface-2);transition:.15s;position:relative}
.tt-cell:hover{border-color:var(--brand);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.tt-cell.has{background:var(--brand-050);border-color:var(--brand-100);color:var(--brand)}
.tt-cell.evening{background:#fff7ed;border-color:#fed7aa;color:#c2410c}
[data-theme="dark"] .tt-cell.evening{background:#2a1f12;border-color:#5a3f1e;color:#fbbf24}
.tt-cell .sub{font-weight:750;font-size:13px;display:block}
.tt-cell .place{font-size:10.5px;opacity:.8}
.tt-cell.now{box-shadow:0 0 0 2px var(--brand), 0 4px 14px rgba(37,99,235,.3)}
.tt-cell.break{background:repeating-linear-gradient(45deg,var(--surface-3),var(--surface-3) 6px,transparent 6px,transparent 12px);cursor:default;border-style:dashed}

/* ---------------- 日历（运动打卡） ---------------- */
.cal-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px}
.cal-head{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;margin-bottom:6px}
.cal-head div{text-align:center;font-size:11.5px;color:var(--text-3);font-weight:700;padding:2px}
.cal-cell{aspect-ratio:1/1;border:1px solid var(--border);border-radius:9px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:2px;cursor:pointer;background:var(--surface-2);font-size:11px;transition:.15s;position:relative}
.cal-cell:hover{border-color:var(--brand);transform:scale(1.06);z-index:2}
.cal-cell.blank{border:none;background:transparent;cursor:default}
.cal-cell .d{font-weight:700;font-size:12.5px}
.cal-cell .v{font-size:9.5px;color:var(--text-3);line-height:1.1;text-align:center}
.cal-cell.today{outline:2px solid var(--brand);outline-offset:1px}
.cal-legend{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:11.5px;color:var(--text-3);margin-top:10px}
.cal-legend i{width:13px;height:13px;border-radius:4px;display:inline-block;vertical-align:-2px;margin-right:4px;border:1px solid var(--border)}

/* ---------------- 座位表 ---------------- */
.seat-grid{display:grid;gap:8px;justify-content:center}
.seat{height:56px;min-width:78px;border-radius:10px;border:1px solid var(--border);background:var(--surface-2);
  display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;font-size:12.5px;
  font-weight:650;transition:.15s;padding:2px;position:relative}
.seat:hover{border-color:var(--brand);background:var(--brand-050)}
.seat.empty-cell{color:var(--text-3);font-weight:400;font-size:11px;border-style:dashed}
.seat .role{font-size:9.5px;color:var(--text-3);font-weight:400}
.podium{height:30px;border-radius:8px;background:var(--surface-3);display:grid;place-items:center;
  font-size:11.5px;color:var(--text-3);letter-spacing:4px;margin-bottom:10px;font-weight:700}

/* ---------------- 随机点名 ---------------- */
.roll-stage{min-height:180px;display:grid;place-items:center;background:var(--surface-2);border:1px dashed var(--border-strong);
  border-radius:var(--radius);position:relative;overflow:hidden}
.roll-name{font-size:44px;font-weight:850;letter-spacing:3px;color:var(--brand);transition:.1s}
.roll-name.small{font-size:26px}
.roll-tag{position:absolute;top:10px;left:12px;font-size:11.5px;color:var(--text-3)}
.roll-confetti{position:absolute;inset:0;pointer-events:none}

/* ---------------- 富文本 ---------------- */
.rte{border:1px solid var(--border);border-radius:10px;overflow:hidden;background:var(--surface-2)}
.rte-bar{display:flex;gap:2px;padding:6px;border-bottom:1px solid var(--border);background:var(--surface-3);flex-wrap:wrap}
.rte-bar button{width:28px;height:28px;border:none;background:transparent;border-radius:6px;cursor:pointer;color:var(--text-2);font-size:13px}
.rte-bar button:hover{background:var(--surface);color:var(--text)}
.rte-area{padding:12px;min-height:170px;outline:none;background:var(--surface);line-height:1.75}
.rte-area:empty::before{content:attr(data-ph);color:var(--text-3)}
.rte-area h3,.rte-area h4{font-weight:800}
.rte-area blockquote{border-left:3px solid var(--brand);margin:8px 0;padding:2px 12px;color:var(--text-2);background:var(--brand-050);border-radius:0 8px 8px 0}
.rte-area table{border-collapse:collapse;width:100%;margin:8px 0}
.rte-area td,.rte-area th{border:1px solid var(--border-strong);padding:5px 8px}
.prose{line-height:1.85;font-size:13.5px}
.prose h3{font-size:15px;margin:16px 0 8px;padding-left:10px;border-left:4px solid var(--brand);background:var(--brand-050);padding:6px 10px;border-radius:0 8px 8px 0}
.prose p{margin:9px 0;white-space:pre-wrap}
.prose ul,.prose ol{margin:8px 0;padding-left:22px}
.prose li{margin:3px 0}
.prose blockquote{border-left:3px solid var(--brand);background:var(--brand-050);margin:10px 0;padding:8px 14px;border-radius:0 8px 8px 0}

/* ---------------- AI 对话 ---------------- */
.chat-box{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;height:min(52vh,440px);background:var(--surface-2)}
.chat-log{flex:1;overflow:auto;padding:12px;display:flex;flex-direction:column;gap:10px}
.msg{max-width:86%;padding:9px 13px;border-radius:13px;font-size:13px;line-height:1.7;white-space:pre-wrap;word-break:break-word}
.msg.ai{background:var(--surface);border:1px solid var(--border);align-self:flex-start;border-bottom-left-radius:4px}
.msg.me{background:var(--brand);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.chat-input{display:flex;gap:8px;padding:10px;border-top:1px solid var(--border);background:var(--surface)}
.chat-sugs{display:flex;gap:6px;flex-wrap:wrap;padding:8px 10px 0}
.ai-output{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:16px;min-height:180px}

/* ---------------- 照片 ---------------- */
.photos{display:flex;gap:8px;flex-wrap:wrap}
.photos img{width:78px;height:78px;object-fit:cover;border-radius:9px;border:1px solid var(--border);cursor:zoom-in}
.photos .del{position:absolute;top:-6px;right:-6px;background:var(--danger);color:#fff;border:none;border-radius:50%;
  width:20px;height:20px;cursor:pointer;font-size:12px;line-height:1}
.photo-wrap{position:relative}

/* ---------------- 图表 ---------------- */
.chart{width:100%;overflow:hidden}
.chart svg{display:block;width:100%;height:auto}
.legend{display:flex;gap:12px;flex-wrap:wrap;font-size:11.5px;color:var(--text-2);margin-top:8px;justify-content:center}
.legend i{width:10px;height:10px;border-radius:3px;display:inline-block;margin-right:5px;vertical-align:-1px}

/* ---------------- 打印 ---------------- */
.print-root{display:none}
@media print{
  body{overflow:visible;background:#fff}
  .app,.toast-root,.modal-root,.sidebar-mask{display:none !important}
  .print-root{display:block !important;color:#000}
  .print-root{--bg:#fff;--surface:#fff;--surface-2:#fff;--surface-3:#f4f4f4;--border:#bbb;--text:#000;--text-2:#333;--text-3:#666;
    --brand:#1a4fa0;--brand-050:#eef3fb;--brand-100:#c9d9f0;--ok:#146c43;--warn:#a06800;--danger:#b42318;--purple:#5b3fa8}
  .print-root .p-title{text-align:center;font-size:20px;font-weight:800;margin-bottom:4px}
  .print-root .p-sub{text-align:center;font-size:12px;color:#666;margin-bottom:14px}
  .print-root table{width:100%;border-collapse:collapse;font-size:12px}
  .print-root th,.print-root td{border:1px solid #999;padding:6px 8px}
  .print-root .pb{page-break-after:always}
  @page{margin:12mm}
}
.pt-hide{display:none !important}

/* ---------------- 响应式 ---------------- */
@media (max-width:1180px){
  .g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .g3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .row4{grid-template-columns:1fr 1fr}
  .row3{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .app{grid-template-columns:0 1fr}
  .app.collapsed{grid-template-columns:0 1fr}
  .sidebar{position:fixed;left:0;top:var(--topbar-h);bottom:0;width:250px;z-index:58;transform:translateX(-102%);
    transition:transform .22s ease;box-shadow:var(--shadow-3)}
  .app.mobile-open .sidebar{transform:none}
  .app.mobile-open .sidebar-mask{display:block}
  .app.collapsed .nav-item{justify-content:flex-start;padding:9px 11px}
  .app.collapsed .nav-item .txt,.app.collapsed .brand-text,.app.collapsed .storage-box{display:block}
  .app.collapsed .nav-group{text-align:left;font-size:11px;padding:12px 12px 4px}
  .topbar-search{max-width:none}
  .brand-sub{display:none}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .row2,.row3,.row4{grid-template-columns:1fr}
  .quad-grid{grid-template-columns:1fr}
  .page{padding:14px 12px 60px}
  .stat .st-value{font-size:22px}
  .roll-name{font-size:32px}
}
@media (max-width:620px){
  .brand-title{font-size:13px;max-width:120px}
  .topbar{padding:0 8px;gap:4px}
  .topbar-search input{height:34px}
  .icon-btn{width:32px;height:32px}
  .dropdown{width:min(320px,92vw);right:-4px}
  .page-head h1{font-size:18px}
  .tabs .tab{padding:8px 11px;font-size:12.5px}
  table.tb{font-size:12px}
  table.tb th,table.tb td{padding:7px 8px}
}
@media (prefers-reduced-motion:reduce){*{animation:none !important;transition:none !important}}