:root{
  --bg:#F2F5F9;
  --card:#FFFFFF;
  --text:#16202E;
  --sub:#6A7889;
  --line:#E5EAF1;
  --brand:#1E3A5F;
  --brand-2:#2C5282;
  --soft:#EDF2F9;
  --danger:#B83A2E;
  --ok:#1C7A5E;
  --warn:#A9620C;
  --radius:14px;
  --shadow:0 1px 2px rgba(20,32,46,.05), 0 6px 18px rgba(20,32,46,.06);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:#E9EDF3;
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:14px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;font-size:inherit}
input,select,textarea{font-family:inherit;font-size:14px;color:var(--text)}
.app{
  max-width:540px;margin:0 auto;min-height:100vh;background:var(--bg);
  position:relative;padding-bottom:72px;
  box-shadow:0 0 0 1px rgba(30,58,95,.06), 0 12px 40px rgba(30,58,95,.08);
}
@media(min-width:760px){
  .app{margin:0 auto;min-height:100vh;border-radius:0}
}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:20;background:linear-gradient(180deg,#1E3A5F 0%,#24466F 100%);color:#fff;padding-top:env(safe-area-inset-top)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 16px 14px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{width:30px;height:30px;border-radius:9px;background:rgba(255,255,255,.16);position:relative;flex:0 0 auto}
.brand-mark::before{content:"";position:absolute;left:8px;top:8px;width:14px;height:14px;border:2px solid #fff;border-radius:4px;border-bottom-color:transparent;border-right-color:transparent;transform:rotate(45deg)}
.brand-title{font-size:15px;font-weight:600;letter-spacing:.3px}
.brand-sub{font-size:11px;opacity:.72;margin-top:1px}
.icon-btn{width:32px;height:32px;border-radius:50%;background:rgba(255,255,255,.14);color:#fff;font-size:15px;display:flex;align-items:center;justify-content:center}

/* 视图 */
.view{padding:14px 14px 20px}
.section{margin-bottom:18px}
.section-head{display:flex;align-items:center;justify-content:space-between;margin:0 2px 9px}
.section-title{font-size:14px;font-weight:600;letter-spacing:.2px}
.section-more{font-size:12px;color:var(--brand-2)}

/* 卡片 */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px}
.card + .card{margin-top:10px}

/* 指标 */
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.stat{background:var(--card);border-radius:12px;padding:12px 4px;text-align:center;box-shadow:var(--shadow);min-width:0}
.stat-num{font-size:19px;font-weight:650;letter-spacing:-.3px;color:var(--brand)}
.stat-num.danger{color:var(--danger)}
.stat-label{font-size:10.5px;color:var(--sub);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* 学员卡 */
.stu{display:flex;gap:11px;align-items:flex-start;padding:13px 14px;background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:9px;position:relative}
.stu:active{background:#FBFCFE}
.avatar{width:40px;height:40px;border-radius:11px;background:var(--soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:600;flex:0 0 auto}
.stu-main{flex:1;min-width:0}
.stu-name{font-size:14.5px;font-weight:600;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.stu-meta{font-size:12px;color:var(--sub);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stu-tags{display:flex;gap:5px;margin-top:6px;flex-wrap:wrap}

/* 标签 */
.tag{font-size:10.5px;padding:1.5px 7px;border-radius:5px;background:var(--soft);color:var(--brand-2);white-space:nowrap}
.tag.warn{background:#FBF1E3;color:var(--warn)}
.tag.danger{background:#FBECEA;color:var(--danger)}
.tag.ok{background:#E9F5F1;color:var(--ok)}
.tag.line{background:transparent;border:1px solid var(--line);color:var(--sub)}

.dot{width:5px;height:5px;border-radius:50%;background:var(--danger);display:inline-block;vertical-align:middle;margin-right:4px}

/* 筛选 */
.searchbar{display:flex;gap:8px;margin-bottom:10px}
.searchbar input{flex:1;border:1px solid var(--line);background:var(--card);border-radius:10px;padding:10px 13px;outline:none}
.searchbar input:focus{border-color:#A9BFD8}
.btn-ghost{border:1px solid var(--line);background:var(--card);border-radius:10px;padding:0 14px;font-size:13px;color:var(--brand-2)}
.chips{display:flex;gap:7px;overflow-x:auto;padding-bottom:9px;margin-bottom:2px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{font-size:12.5px;padding:6px 13px;border-radius:20px;background:var(--card);border:1px solid var(--line);color:var(--sub);white-space:nowrap;flex:0 0 auto}
.chip.active{background:var(--brand);border-color:var(--brand);color:#fff}

/* 表格导入工具条 */
.tool-row{display:flex;gap:7px;margin:2px 0 10px}
.tool-btn{flex:1;min-width:0;display:flex;align-items:center;justify-content:center;gap:4px;font-size:12px;padding:8px 4px;border-radius:9px;background:var(--card);border:1px solid var(--line);color:var(--brand-2);white-space:nowrap;overflow:hidden}
.tool-btn:active{background:var(--soft)}
.imp-summary{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;margin-bottom:10px}
.imp-cell{background:var(--soft);border-radius:9px;padding:9px 4px;text-align:center}
.imp-num{font-size:17px;font-weight:650;color:var(--brand);line-height:1.25}
.imp-num.ok{color:#0F6E56}
.imp-num.warn{color:#B26A00}
.imp-num.err{color:var(--danger)}
.imp-label{font-size:10.5px;color:var(--sub);margin-top:1px}
.imp-row{display:flex;gap:8px;align-items:baseline;font-size:12px;padding:5px 0;border-bottom:1px dashed var(--line)}
.imp-row:last-child{border-bottom:none}
.imp-row .rno{color:var(--sub);flex:0 0 34px;font-variant-numeric:tabular-nums}
.imp-row .rname{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.imp-tag{flex:0 0 auto;font-size:10.5px;padding:1px 6px;border-radius:4px;background:var(--soft);color:var(--sub)}
.imp-tag.add{background:#E1F5EE;color:#0F6E56}
.imp-tag.upd{background:#E6EEF8;color:#2C5282}
.imp-tag.skip{background:#F1F3F6;color:#6B7684}
.imp-tag.err{background:#FBECEA;color:var(--danger)}
.imp-scroll{max-height:230px;overflow:auto;margin:8px 0}

/* 主按钮 */
.btn{display:block;width:100%;padding:12px;border-radius:11px;background:var(--brand);color:#fff;font-size:14px;font-weight:500;text-align:center;transition:.15s}
.btn:active{background:#162C4A}
.btn:disabled{opacity:.5}
.btn.secondary{background:#fff;color:var(--brand);border:1px solid var(--line)}
.btn.danger{background:#FBECEA;color:var(--danger)}
.btn-row{display:flex;gap:9px;margin-top:12px}
.btn-row .btn{margin:0}

/* 表单 */
.field{margin-bottom:13px}
.field label{display:block;font-size:12.5px;color:var(--sub);margin-bottom:5px}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:#fff;outline:none;
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:#A9BFD8;box-shadow:0 0 0 3px rgba(44,82,130,.08)}
.field textarea{min-height:110px;resize:vertical;line-height:1.6}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}

/* 详情 */
.profile-head{background:linear-gradient(135deg,#1E3A5F,#2C5282);color:#fff;border-radius:16px;padding:16px;margin-bottom:12px}
.profile-head .ph-top{display:flex;align-items:center;gap:12px}
.profile-head .avatar{background:rgba(255,255,255,.16);color:#fff;width:48px;height:48px;border-radius:14px;font-size:17px}
.ph-name{font-size:17px;font-weight:600}
.ph-meta{font-size:12px;opacity:.8;margin-top:2px}
.ph-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:11px}
.ph-tags .tag{background:rgba(255,255,255,.15);color:#fff}
.progress{height:5px;border-radius:3px;background:rgba(255,255,255,.2);margin-top:11px;overflow:hidden}
.progress > i{display:block;height:100%;background:#8FC1E8;border-radius:3px}
.ph-progress-text{font-size:11px;opacity:.8;margin-top:5px}

.kv{display:flex;padding:8px 0;border-bottom:1px solid #F2F5F9;font-size:13px;gap:12px}
.kv:last-child{border-bottom:none}
.kv dt{color:var(--sub);width:76px;flex:0 0 auto;font-size:12.5px}
.kv dd{margin:0;flex:1;word-break:break-all}

.timeline{position:relative;padding-left:16px}
.timeline::before{content:"";position:absolute;left:4px;top:6px;bottom:6px;width:1px;background:var(--line)}
.tl-item{position:relative;padding-bottom:14px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-15px;top:6px;width:7px;height:7px;border-radius:50%;background:#fff;border:1.5px solid var(--brand-2)}
.tl-time{font-size:11px;color:var(--sub)}
.tl-title{font-size:13px;margin-top:2px}
.tl-body{font-size:12.5px;color:var(--sub);margin-top:3px;line-height:1.55}

/* 问答 */
.ask-box{background:var(--card);border-radius:16px;padding:14px;box-shadow:var(--shadow)}
.picker{display:flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:11px;padding:9px 12px;margin-bottom:10px;background:#fbfcfe}
.picker .p-label{font-size:12px;color:var(--sub);flex:0 0 auto}
.picker .p-value{flex:1;font-size:13.5px;font-weight:500}
.picker .p-value.empty{color:#A7B2C0;font-weight:400}
.ask-box textarea{width:100%;border:1px solid var(--line);border-radius:11px;padding:11px 12px;min-height:84px;resize:none;outline:none;line-height:1.6}
.ask-box textarea:focus{border-color:#A9BFD8}
.ask-actions{display:flex;gap:8px;margin-top:10px;align-items:center}
.ask-actions .btn{flex:1}

.answer{margin-top:14px}
.ans-block{background:var(--card);border-radius:14px;padding:14px;box-shadow:var(--shadow);margin-bottom:10px}
.ans-block.conclusion{border-left:3px solid var(--brand);background:linear-gradient(180deg,#fff,#FAFCFF)}
.ans-label{font-size:11px;letter-spacing:1px;color:var(--brand-2);font-weight:600;margin-bottom:7px;text-transform:uppercase}
.ans-text{font-size:14px;line-height:1.72}
.ans-list{margin:0;padding-left:0;list-style:none}
.ans-list li{position:relative;padding-left:16px;margin-bottom:7px;font-size:13.5px;line-height:1.65}
.ans-list li:last-child{margin-bottom:0}
.ans-list li::before{content:"";position:absolute;left:2px;top:9px;width:5px;height:5px;border-radius:1.5px;background:#B7C7DA}
.risk{background:#FDF6EC;border-left:3px solid #D9A441}
.risk .ans-label{color:var(--warn)}
.next{background:#F0F7F4;border-left:3px solid #2E8B6E}
.next .ans-label{color:var(--ok)}
.src-item{font-size:12.5px;padding:9px 0;border-bottom:1px dashed var(--line)}
.src-item:last-child{border-bottom:none}
.src-title{font-weight:500;color:var(--brand-2)}
.src-snip{color:var(--sub);margin-top:3px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* 空状态 */
.empty{text-align:center;padding:34px 20px;color:#93A1B2;font-size:13px}
.empty .e-ico{font-size:26px;opacity:.4;margin-bottom:8px}

/* 底栏 */
.tabbar{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:540px;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(5,minmax(0,1fr));padding:6px 0 calc(6px + env(safe-area-inset-bottom));z-index:30}
.tab{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:10px;color:#8A97A6;padding:3px 0;min-width:0}
.tab > span{white-space:nowrap}
.tab-ico{font-size:16px;line-height:1.1}
.tab.active{color:var(--brand);font-weight:500}

/* 弹层 */
.sheet-mask{position:fixed;inset:0;background:rgba(16,26,38,.42);opacity:0;pointer-events:none;transition:.22s;z-index:40}
.sheet-mask.show{opacity:1;pointer-events:auto}
.sheet{position:fixed;left:50%;bottom:0;transform:translate(-50%,100%);width:100%;max-width:540px;max-height:86vh;background:#fff;border-radius:18px 18px 0 0;z-index:50;transition:transform .26s cubic-bezier(.32,.72,0,1);display:flex;flex-direction:column;overflow:hidden}
.sheet.show{transform:translate(-50%,0)}
.sheet-head{display:flex;align-items:center;justify-content:space-between;padding:15px 16px;border-bottom:1px solid var(--line);font-weight:600;font-size:14.5px;flex:0 0 auto}
.sheet-close{color:var(--sub);font-size:15px}
.sheet-body{padding:16px;overflow-y:auto;-webkit-overflow-scrolling:touch;flex:1 1 auto;min-height:0}

.toast{position:fixed;left:50%;top:76px;transform:translate(-50%,-8px);background:rgba(22,32,46,.92);color:#fff;padding:9px 16px;border-radius:9px;font-size:13px;opacity:0;transition:.22s;z-index:60;pointer-events:none;max-width:80%;text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}

.loading{display:flex;align-items:center;justify-content:center;padding:30px;color:var(--sub);font-size:13px;gap:8px}
.spinner{width:14px;height:14px;border:2px solid #D7E0EA;border-top-color:var(--brand-2);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.hint{font-size:11.5px;color:var(--sub);line-height:1.6;margin-top:6px}
.divider{height:1px;background:var(--line);margin:14px 0}
.list-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid #F2F5F9;font-size:13.5px}
.list-row:last-child{border-bottom:none}
.list-row .lr-sub{font-size:11.5px;color:var(--sub);margin-top:2px}
.chev{color:#C3CDD9;font-size:14px}
.mini-chart{display:flex;align-items:flex-end;gap:6px;height:52px;margin-top:10px}
.mini-bar{flex:1;background:var(--soft);border-radius:4px 4px 0 0;position:relative;min-height:4px}
.mini-bar > i{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(180deg,#5B84B1,#2C5282);border-radius:4px 4px 0 0}
.bar-label{font-size:10px;color:var(--sub);text-align:center;margin-top:4px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.seg{display:flex;background:var(--soft);border-radius:10px;padding:3px;margin-bottom:12px}
.seg button{flex:1;padding:7px;border-radius:8px;font-size:12.5px;color:var(--sub)}
.seg button.active{background:#fff;color:var(--brand);font-weight:500;box-shadow:0 1px 3px rgba(20,32,46,.08)}

/* 知识库上传 */
.up-card{border:1px solid var(--line);border-radius:12px;padding:11px 12px;margin-bottom:10px;background:#fff}
.up-card.err{border-color:#F0C9C4;background:#FDF7F6}
.up-head{display:flex;align-items:center;gap:8px;justify-content:space-between}
.up-name{font-size:13px;font-weight:500;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.up-badge{font-size:10.5px;padding:2px 7px;border-radius:5px;background:var(--soft);color:var(--sub);flex:0 0 auto}
.up-badge.ok{background:#E1F5EE;color:#0F6E56}
.up-badge.err{background:#FBECEA;color:var(--danger)}
.up-title{width:100%;border:1px solid var(--line);border-radius:8px;padding:7px 9px;font-size:12.5px;margin-top:8px;outline:none}
.up-title:focus{border-color:#A9BFD8}
.up-meta{font-size:11px;color:var(--sub);margin-top:6px}
.up-outline{font-size:11.5px;color:var(--brand-2);margin-top:6px;line-height:1.55;max-height:38px;overflow:hidden}
.up-preview{font-size:11.5px;color:var(--sub);margin-top:7px;line-height:1.55;background:#FAFCFE;border-radius:8px;padding:8px;white-space:pre-wrap;max-height:80px;overflow:hidden}
.up-dup{font-size:11px;color:var(--warn);margin-top:6px}
.up-errmsg{font-size:12px;color:var(--danger);margin-top:6px;line-height:1.55}

/* 知识详情 */
.kb-detail-meta{font-size:11.5px;color:var(--sub);margin-bottom:10px;line-height:1.6}
.kb-sec{font-size:12.5px;font-weight:600;margin:15px 0 7px;display:flex;justify-content:space-between;align-items:center}
.kb-sec .more{font-size:11.5px;color:var(--brand-2);font-weight:400}
.ol-item{display:flex;gap:7px;font-size:12.5px;padding:3px 0;line-height:1.5}
.ol-item .lv{color:#A7B2C0;flex:0 0 22px;font-variant-numeric:tabular-nums;font-size:11px;padding-top:2px}
.chk{font-size:12px;line-height:1.68;color:#2A3646;background:#FAFCFE;border:1px solid #EEF3F9;border-radius:9px;padding:9px 10px;margin-bottom:7px;white-space:pre-wrap}
.chk-h{font-size:10.5px;color:var(--brand-2);margin-bottom:4px;font-weight:600}