/* 学习AI错题本 · PC 后台
   视觉：主色 #0E8A7B / 画布 #EDF1EE / 白卡描边；侧栏 216px，内容区最大 1180px。 */

:root{
  --canvas:#EDF1EE; --surface:#FFFFFF;
  --line:#E4E9E6; --line-strong:#D3DBD7;
  --ink:#1E2B29; --ink-2:#5C6E6A; --ink-3:#94A39F;
  --brand:#0E8A7B; --brand-d:#0A6E62; --brand-soft:#E5F3F0;
  --amber:#E07B22; --amber-soft:#FCEFDF;
  --danger:#C2453A; --danger-soft:#FBEAE7;
  --radius:12px;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
html,body{margin:0;padding:0;min-height:100%}
body{background:var(--canvas);color:var(--ink);font-size:12.5px;line-height:1.6;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased}
button{font-family:inherit;cursor:pointer}
a{color:var(--brand-d);text-decoration:none}

/* ---------- 登录门禁 ---------- */
#auth-gate{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:28px}
.gate-card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:28px;width:100%;max-width:430px}
.gate-brand{font-size:12px;font-weight:700;letter-spacing:.04em;color:var(--brand-d);margin-bottom:14px;display:flex;align-items:center;gap:8px}
.gate-brand em{width:24px;height:24px;border-radius:7px;background:var(--brand);color:#fff;font-size:11px;font-style:normal;display:flex;align-items:center;justify-content:center}
.gate-card h2{font-size:19px;margin:0 0 6px}
.gate-card>p{color:var(--ink-2);font-size:12px;margin:0 0 16px}
.gate-tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px}
.gate-tab{border:0;background:transparent;padding:9px 11px;font-size:12px;color:var(--ink-3);border-bottom:2px solid transparent;margin-bottom:-1px}
.gate-tab.on{color:var(--brand-d);font-weight:700;border-bottom-color:var(--brand)}
.gate-form label{display:block;font-size:11.5px;color:var(--ink-2);margin:0 0 5px;font-weight:600}
.gate-form input{width:100%;border:1px solid var(--line-strong);border-radius:9px;padding:9px 11px;font-size:13px;margin:0 0 13px;font-family:inherit}
.gate-form input:focus{outline:2px solid var(--brand-soft);border-color:var(--brand)}
.gate-line{background:var(--brand-soft);color:var(--brand-d);border-radius:9px;padding:9px 11px;font-size:11.5px;margin-bottom:14px;line-height:1.6}
.gate-hint{font-size:11px;color:var(--ink-3);line-height:1.65}
.gate-foot{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);font-size:11px;color:var(--ink-3);line-height:1.7}
.gate-admin-entry{display:flex;align-items:center;justify-content:space-between;margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);font-size:11.5px;color:var(--ink-3)}
.gate-admin-entry button{border:0;background:none;color:var(--brand-d);font-weight:700;font-size:11.5px;padding:0}
.gate-preview{text-align:right;margin-top:8px;font-size:11px}
.otp-row{display:flex;gap:8px}
.otp-row input{flex:1}
.load-error{background:var(--danger-soft);color:var(--danger);border-radius:9px;padding:9px 11px;font-size:11.5px;margin-top:10px}
.gate-ok{background:var(--brand-soft);color:var(--brand-d);border-radius:9px;padding:9px 11px;font-size:11.5px;margin-top:10px}

/* ---------- 控件 ---------- */
.btn{border:1px solid var(--line-strong);background:var(--surface);color:var(--ink);border-radius:9px;
  padding:7px 13px;font-size:12px;font-weight:600}
.btn:hover{border-color:var(--brand)}
.btn.pri{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.pri:hover{background:var(--brand-d)}
.btn.wide{width:100%;padding:10px 14px;margin-top:2px}
.btn.danger{color:var(--danger);border-color:var(--danger-soft);background:#fff}
.btn:disabled{opacity:.45;cursor:not-allowed}
.mini-btn{border:1px solid var(--line-strong);background:#fff;border-radius:7px;padding:5px 10px;font-size:11.5px;color:var(--ink-2)}
.mini-btn.pri{background:var(--brand-soft);border-color:#C7E3DD;color:var(--brand-d);font-weight:700}
.mini-btn.on{background:var(--brand);border-color:var(--brand);color:#fff}
.badge{display:inline-flex;align-items:center;gap:4px;border-radius:20px;padding:2px 9px;font-size:11px;font-weight:600}
.badge.ok{background:var(--brand-soft);color:var(--brand-d)}
.badge.wait{background:var(--amber-soft);color:var(--amber)}
.badge.danger{background:var(--danger-soft);color:var(--danger)}
.badge.gray{background:#EFF2F0;color:var(--ink-3)}
.tag{display:inline-block;background:#EFF2F0;color:var(--ink-2);border-radius:6px;padding:1px 7px;font-size:10.5px;margin-right:5px}

/* ---------- 框架 ---------- */
.layout{display:flex;min-height:100vh}
.side{width:216px;flex:0 0 216px;background:#FBFCFB;border-right:1px solid var(--line);
  padding:16px 12px;display:flex;flex-direction:column;gap:3px;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{display:flex;align-items:center;gap:9px;padding:2px 6px 14px;border-bottom:1px solid var(--line);margin-bottom:8px}
.brand em{width:26px;height:26px;border-radius:8px;background:var(--brand);color:#fff;font-style:normal;font-size:12px;display:flex;align-items:center;justify-content:center}
.brand span{font-size:12.5px;font-weight:700;line-height:1.35;display:block}
.brand small{display:block;font-size:10.5px;color:var(--ink-3);font-weight:400}
.navlabel{font-size:10.5px;color:var(--ink-3);letter-spacing:.08em;padding:10px 8px 4px}
.side-item{display:flex;align-items:center;justify-content:space-between;gap:6px;width:100%;
  border:0;background:transparent;text-align:left;padding:8px 9px;border-radius:8px;font-size:12.5px;color:var(--ink-2)}
.side-item:hover{background:#F1F5F2;color:var(--ink)}
.side-item.on{background:var(--brand-soft);color:var(--brand-d);font-weight:700}
.side-item .cnt{font-size:10.5px;color:var(--ink-3);font-weight:600}
.side-item.on .cnt{color:var(--brand-d)}
.side-foot{margin-top:auto;padding:10px 8px 0;border-top:1px solid var(--line);font-size:10.5px;color:var(--ink-3);line-height:1.6}
#side-nav{flex:1 1 auto;display:flex;flex-direction:column;gap:3px}
.side-user{margin-top:8px;padding:10px 9px;border:1px solid var(--line);border-radius:10px;background:#fff;flex:none}
.side-user .su-t{font-size:10.5px;color:var(--ink-3);letter-spacing:.06em;margin-bottom:5px}
.su-row{display:flex;align-items:baseline;justify-content:space-between;gap:8px;font-size:11px;line-height:1.8}
.su-row .su-k{color:var(--ink-3);flex:none}
.su-row .su-v{color:var(--ink);font-weight:600;text-align:right;max-width:132px;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap;font-variant-numeric:tabular-nums}

.main{flex:1;min-width:0;padding:18px 22px 40px}
.topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  max-width:1180px;margin:0 auto 14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.topbar h1{font-size:17px;margin:0 0 3px}
.topbar .meta{font-size:11.5px;color:var(--ink-3)}
.top-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}
.stage{max-width:1180px;margin:0 auto}
.view{display:none}
.view.on{display:block}

/* ---------- 内容块 ---------- */
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px}
.kpi{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:13px 14px}
.kpi .kh{font-size:11px;color:var(--ink-3);margin-bottom:5px}
.kpi .kn{font-size:21px;font-weight:700;letter-spacing:-.01em}
.kpi .kd{font-size:10.5px;color:var(--ink-3);margin-top:4px;line-height:1.5}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin-bottom:12px}
.panel-h{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.panel-h h3{font-size:13px;margin:0}
.panel-h .sub{font-size:11px;color:var(--ink-3)}
.note{background:#F7F9F8;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:11.5px;color:var(--ink-2);line-height:1.7;margin-bottom:12px}
.note.amber{background:var(--amber-soft);border-color:#F3DFC6;color:#8A5216}
.note b{color:var(--ink)}
.guard{margin-top:10px;font-size:11px;color:var(--ink-3);line-height:1.65}

.tbl{width:100%;border-collapse:collapse}
.tbl th{font-size:11px;color:var(--ink-3);font-weight:600;text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{font-size:11.5px;padding:9px 10px;border-bottom:1px solid #F1F4F2;vertical-align:middle}
.tbl tr:last-child td{border-bottom:0}
.tbl .empty-cell{text-align:center;color:var(--ink-3);padding:26px 0;font-size:11.5px}
.tbl .num{font-variant-numeric:tabular-nums}
.tbl .act{white-space:nowrap}
.tbl .act .mini-btn{margin-right:4px}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.card{border:1px solid var(--line);border-radius:10px;padding:12px;background:#FCFDFC}
.card-h{display:flex;align-items:center;justify-content:space-between;margin-bottom:7px}
.card-h b{font-size:12.5px}
.card .row{display:flex;justify-content:space-between;font-size:11px;color:var(--ink-2);padding:2px 0}
.card .row span:last-child{color:var(--ink);font-weight:600}

.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.field label{display:block;font-size:11px;color:var(--ink-2);font-weight:600;margin-bottom:4px}
.field input,.field select,.field textarea{width:100%;border:1px solid var(--line-strong);border-radius:8px;
  padding:7px 9px;font-size:12px;font-family:inherit;background:#fff;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--brand-soft);border-color:var(--brand)}
.field.wide{grid-column:span 3}
.form-foot{display:flex;gap:8px;margin-top:12px;align-items:center;flex-wrap:wrap}
.form-foot .hint{font-size:11px;color:var(--ink-3)}

.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:12px}
.tab{border:0;background:transparent;padding:8px 12px;font-size:12px;color:var(--ink-3);border-bottom:2px solid transparent;margin-bottom:-1px}
.tab.on{color:var(--brand-d);font-weight:700;border-bottom-color:var(--brand)}

.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:#1E2B29;color:#fff;
  padding:9px 16px;border-radius:20px;font-size:12px;opacity:0;pointer-events:none;transition:opacity .18s;z-index:60}
.toast.on{opacity:.95}

.modal{position:fixed;inset:0;background:rgba(20,32,30,.42);display:flex;align-items:center;justify-content:center;z-index:70;padding:24px}
.modal-card{background:#fff;border-radius:14px;padding:18px;width:100%;max-width:520px;max-height:86vh;overflow:auto}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.modal-head b{font-size:13px}

@media (max-width:1080px){
  .kpi-grid{grid-template-columns:repeat(2,1fr)}
  .cards{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:repeat(2,1fr)}
  .field.wide{grid-column:span 2}
}

/* 工具栏（页面主体右上角新增/导出按钮） */
.viewbar{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;margin:-6px 0 14px}
.viewbar .btn{font-size:11.5px;padding:8px 14px}
.viewbar .btn.pri{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}

/* 词库 / 内容 tabs */
.tabbar{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.tabbtn{font-size:11px;padding:6px 12px;border:1px solid var(--line-strong);border-radius:7px;background:#fff;color:var(--ink-2);cursor:pointer}
.tabbtn.on{background:var(--brand-soft);border-color:#A9D8CF;color:var(--brand-d);font-weight:700}
.tab-body{min-height:20px}

/* 字帖预览 */
.copybook{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px}
.cb-meta{font-size:11px;color:var(--ink-2);margin-bottom:10px;line-height:1.7}
.cb-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:6px}
.cb-cell{aspect-ratio:1/1;border:1.5px solid #D9CBB3;border-radius:4px;background:#FDFCF7;
  display:flex;align-items:center;justify-content:center;font-size:26px;color:var(--ink)}
.cb-cell .cb-char{font-family:"Kaiti SC","STKaiti",serif}

/* 打印（字帖 / 报告 / 错题导出） */
@media print {
  body > *:not(#print-area){display:none !important}
  #print-area{display:block !important;padding:24px}
  .pa-title{font-size:20px;margin:0 0 16px}
  .pa-meta{font-size:13px;color:#444;margin-bottom:14px;line-height:1.8}
  .pa-item{border-bottom:1px dashed #ccc;padding:10px 0;margin-bottom:6px;page-break-inside:avoid}
  .pa-item b{font-size:14px}
  .pa-item div{font-size:13px;margin-top:4px;line-height:1.7}
  .pa-tags{color:#777;font-size:11px !important}
  .pa-table{width:100%;border-collapse:collapse;font-size:13px}
  .pa-table th,.pa-table td{border:1px solid #999;padding:8px 10px;text-align:left}
  .pa-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:8px}
  .pa-cell{aspect-ratio:1/1;border:1.5px solid #333;border-radius:4px;position:relative;
    display:flex;align-items:center;justify-content:center;page-break-inside:avoid}
  .pa-cell span{font-family:"Kaiti SC","STKaiti",serif;font-size:28px}
}
#print-area{display:none}

/* 字帖格线：田字格 / 米字格 / 回宫格 / 拼音四线格 / 描红 */
.pa-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:8px}
.pa-cell{aspect-ratio:1/1;border:1.5px solid #333;border-radius:4px;position:relative;
  display:flex;align-items:center;justify-content:center;page-break-inside:avoid;background:#fff}
.pa-cell span{font-size:28px}
.pa-cell.pa-grid--tian{background:
  linear-gradient(to right, transparent 49.6%, #C9BFA9 49.6%, #C9BFA9 50.4%, transparent 50.4%),
  linear-gradient(to bottom, transparent 49.6%, #C9BFA9 49.6%, #C9BFA9 50.4%, transparent 50.4%)}
.pa-cell.pa-grid--mi{background:
  linear-gradient(to right, transparent 49.6%, #C9BFA9 49.6%, #C9BFA9 50.4%, transparent 50.4%),
  linear-gradient(to bottom, transparent 49.6%, #C9BFA9 49.6%, #C9BFA9 50.4%, transparent 50.4%),
  linear-gradient(45deg, transparent 49.7%, #D8CFC0 49.7%, #D8CFC0 50.3%, transparent 50.3%),
  linear-gradient(-45deg, transparent 49.7%, #D8CFC0 49.7%, #D8CFC0 50.3%, transparent 50.3%)}
.pa-cell.pa-grid--hui{box-shadow:inset 0 0 0 4px #E3DCCB}
.pa-cell.pa-grid--pinyin{background:
  linear-gradient(to bottom, transparent 24%, #B9A98C 24%, #B9A98C 26%, transparent 26%,
    transparent 49%, #B9A98C 49%, #B9A98C 51%, transparent 51%,
    transparent 74%, #B9A98C 74%, #B9A98C 76%, transparent 76%)}
.pa-char--trace{opacity:.28}
.pa-char--outline{-webkit-text-stroke:1px #333;color:transparent}
.cb-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:6px}
.cb-cell{aspect-ratio:1/1;border:1.5px solid #D9CBB3;border-radius:4px;background:#FDFCF7;
  position:relative;display:flex;align-items:center;justify-content:center;font-size:26px;color:var(--ink)}
.cb-cell .cb-char{font-family:"Kaiti SC","STKaiti",serif}
.cb-cell.cb-grid--tian{background:
  linear-gradient(to right, transparent 49.6%, #D8CFC0 49.6%, #D8CFC0 50.4%, transparent 50.4%),
  linear-gradient(to bottom, transparent 49.6%, #D8CFC0 49.6%, #D8CFC0 50.4%, transparent 50.4%)}

/* ---------- 表单弹窗（新增 / 编辑统一走弹窗，不在主页面铺表单） ---------- */
body.modal-open{overflow:hidden}
.modal-scrim{position:fixed;inset:0;background:rgba(20,32,30,.42);z-index:60;
  display:flex;align-items:flex-start;justify-content:center;padding:6vh 16px 24px;overflow:auto}
.modal-box{background:var(--surface);border-radius:14px;width:100%;max-width:620px;
  box-shadow:0 18px 48px rgba(20,32,30,.24);border:1px solid var(--line);animation:mIn .16s ease-out}
@keyframes mIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.modal-h{display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 18px;border-bottom:1px solid var(--line)}
.modal-h b{font-size:14px}
.modal-x{border:0;background:transparent;font-size:20px;line-height:1;color:var(--ink-3);padding:2px 6px;border-radius:6px}
.modal-x:hover{background:var(--canvas);color:var(--ink)}
.modal-body{padding:16px 18px 18px}
.modal-body .form-grid{grid-template-columns:repeat(2,1fr)}
.modal-body .field.wide{grid-column:span 2}
@media(max-width:640px){.modal-body .form-grid{grid-template-columns:1fr}.modal-body .field.wide{grid-column:span 1}}


/* 块区域统一：每个主体块都有边框、内边距与外边距（家长总览 / 全部列表页） */
.panel{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:12px}
.panel .tbl{margin:0}
.kpi-grid{margin-bottom:12px}
.cards{margin-bottom:4px}
.cards .card{margin-bottom:10px}
.tbl th,.tbl td{padding:9px 12px}
.tblwrap,.tbl{background:#fff}
.main>.stage{padding:0 2px}
@media print{.panel{border:0;padding:0}}

/* 统一对话框（替代原生 prompt/alert/confirm） */
.ui-dlg-msg{font-size:13px;color:var(--ink-2, #3E4A47);line-height:1.6;word-break:break-all;margin-bottom:4px}
.modal-box--sm .modal-body{min-width:300px;max-width:420px}
.modal-box--sm .form-foot{margin-top:14px;justify-content:flex-end}

/* 视图加载骨架（导航时替代静态示例闪现） */
.skel-wrap{padding:4px 2px}
.skel{height:14px;border-radius:7px;margin:0 0 12px;
  background:linear-gradient(90deg,#EDF2F0 25%,#F8FBF9 50%,#EDF2F0 75%);
  background-size:200% 100%;animation:skelmove 1.1s infinite linear}
.skel--card{height:92px;border-radius:12px;margin-bottom:14px}
.skel--wide{height:170px;border-radius:12px}
.cards .skel--card{flex:1}
@keyframes skelmove{0%{background-position:200% 0}100%{background-position:-200% 0}}