/* 琴韵智评 —— 布局：左侧是一架竖放的琴键（导航），右侧是白色琴谱纸般的工作区。
   单一浅色主题：乐谱是白纸黑字；漆黑的侧栏是唯一的大胆之处。 */
:root {
  color-scheme: light;
  --lacquer: #17161F; --lacquer-2: #25232F; --paper: #F4F5F9; --card: #FFFFFF;
  --ink: #1E1D2B; --ink2: #55546C; --ink3: #8B8AA2; --rule: #E3E4EC; --staff: #2A2938;
  --rouge: #C2416B; --rouge-d: #A3325A; --rouge-soft: #F8E7ED; --blue-soft: #E5F0F7; --gold-soft: #F7EEDB;
  --s1: #c2416b; --s2: #1f7fb0; --s3: #b77a0e;
  --good: #2E8B57; --warn: #B7791F; --bad: #C0392B;
  --serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 15px; line-height: 1.7; }
button, input, select, textarea { font: inherit; color: inherit; }
.n { font-variant-numeric: tabular-nums; }
.vh { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; }
h1, h2, h3, h4 { margin: 0; text-wrap: balance; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--rouge); outline-offset: 2px; }

/* ---------- 外壳 ---------- */
.app { display: grid; grid-template-columns: 248px minmax(0, 1fr); min-height: 100vh; background: linear-gradient(90deg, var(--lacquer) 248px, var(--paper) 248px); }
.side { background: var(--lacquer); color: #EDEBF5; display: flex; flex-direction: column; padding: 22px 16px 18px 0; position: sticky; top: 0; height: 100vh; }
.brand { display: flex; gap: 12px; align-items: center; padding-left: 20px; }
.brand .logo svg { width: 40px; height: 40px; display: block; }
.brand b { font-family: var(--serif); font-size: 21px; letter-spacing: .06em; display: block; line-height: 1.2; }
.brand small { color: #A9A6BD; font-size: 12px; }
.keys { display: flex; flex-direction: column; margin-top: 30px; }
.key { position: relative; height: 56px; border: 0; border-radius: 0 9px 9px 0; margin: 0 0 3px; padding: 0 16px 0 70px; text-align: left; cursor: pointer;
  background: linear-gradient(90deg, #E9E7F0 0%, #FFFFFF 30%, #F6F5FA 100%); color: var(--ink); font-size: 15.5px; font-weight: 500;
  box-shadow: inset 0 -3px 0 rgba(0,0,0,.08); transition: transform .12s, background .12s; }
.key:hover { transform: translateX(3px); }
.key.on { background: linear-gradient(90deg, #E3C6D1 0%, #FCEFF4 30%, #FFFFFF 100%); box-shadow: inset 0 -1px 0 rgba(0,0,0,.06), inset 4px 0 0 var(--rouge); transform: translateX(-4px); font-weight: 700; color: var(--rouge-d); }
.blk { display: block; position: relative; z-index: 2; width: 54px; height: 26px; margin: -16px 0 -13px; background: linear-gradient(90deg, #08070C, #2B2935); border-radius: 0 5px 5px 0; box-shadow: 2px 3px 6px rgba(0,0,0,.45); pointer-events: none; }
.me { margin-top: auto; display: flex; gap: 10px; align-items: center; padding: 14px 4px 0 20px; border-top: 1px solid #2E2C3A; }
.me b { display: block; font-size: 14.5px; }
.me small { color: #A9A6BD; font-size: 12px; }
.me > div:not(.av) { min-width: 0; flex: 1; }
.me small { display:block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.me .out { margin-left: auto; white-space: nowrap; flex: none; background: transparent; border: 1px solid #3A3848; color: #D9D6E6; border-radius: 8px; padding: 4px 10px; cursor: pointer; font-size: 13px; }
.av { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; background: var(--rouge); color: #fff; font-weight: 700; flex-shrink: 0; }
.main { min-width: 0; padding: 0 32px 60px; }
.top { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; padding: 28px 0 18px; border-bottom: 1px solid var(--rule); margin-bottom: 22px; }
.top h1 { font-family: var(--serif); font-size: 27px; font-weight: 700; line-height: 1.3; }
.top p { margin: 4px 0 0; color: var(--ink2); font-size: 14px; }
.mode { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; padding: 4px 12px; border-radius: 999px; background: #ECECF2; color: var(--ink2); white-space: nowrap; }
.mode::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--ink3); }
.mode.on { background: var(--blue-soft); color: #165E84; }
.mode.on::before { background: var(--good); }
.content { display: grid; gap: 18px; }

/* ---------- 通用 ---------- */
.panel { background: var(--card); border: 1px solid var(--rule); border-radius: 14px; padding: 20px 22px; min-width: 0; }
.p-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.p-head h2 { font-family: var(--serif); font-size: 18px; font-weight: 700; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.row.end { justify-content: flex-end; }
.note { font-size: 12.5px; color: var(--ink3); margin: 8px 0 0; }
.mute { color: var(--ink3); }
.err { color: var(--bad); font-size: 13.5px; }
.empty, .empty-s { color: var(--ink2); font-size: 14px; }
.empty-s { padding: 10px 0; }
.btn { border: 0; border-radius: 10px; padding: 9px 18px; font-weight: 700; font-size: 14.5px; cursor: pointer; background: var(--lacquer); color: #fff; display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.btn.primary { background: var(--rouge); }
.btn.primary:hover { background: var(--rouge-d); }
.btn.ghost { background: var(--card); color: var(--ink); box-shadow: inset 0 0 0 1.5px var(--rule); }
.btn.small { padding: 5px 12px; font-size: 13px; border-radius: 8px; font-weight: 500; background: #EDEDF3; color: var(--ink); }
.btn.small.ghost { background: transparent; box-shadow: inset 0 0 0 1.5px var(--rule); }
.btn.small.primary { background: var(--rouge); color: #fff; }
.btn.danger { background: var(--bad); color: #fff; }
.btn.big { padding: 12px 24px; font-size: 16px; }
.btn.wide { width: 100%; justify-content: center; padding: 12px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.link { border: 0; background: none; color: var(--rouge-d); cursor: pointer; padding: 0; font-size: 13.5px; font-weight: 500; }
.pill { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 500; padding: 1px 9px; border-radius: 999px; background: #EEEEF3; color: var(--ink2); white-space: nowrap; }
.pill i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.pill.good { background: #E3F2EA; color: var(--good); }
.pill.bad { background: #F9E6E3; color: var(--bad); }
.pill.warn { background: #FBF0DC; color: var(--warn); }
.pill.mute { color: var(--ink3); }
.pill.blue { background: var(--blue-soft); color: #165E84; }
.pill.gold { background: var(--gold-soft); color: #8A5B07; }
.seg { display: inline-flex; background: #ECECF2; border-radius: 10px; padding: 3px; }
.seg button { border: 0; background: transparent; border-radius: 8px; padding: 5px 14px; font-size: 13.5px; cursor: pointer; color: var(--ink2); }
.seg button.on { background: var(--card); color: var(--ink); font-weight: 700; box-shadow: 0 1px 3px rgba(0,0,0,.08); }
.banner { background: var(--blue-soft); border-radius: 12px; padding: 12px 16px; font-size: 14.5px; }
.banner.good { background: #E3F2EA; } .banner.bad { background: #F9E6E3; }
.up { color: var(--good); } .down { color: var(--bad); }

/* 指标条 */
.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); background: var(--card); border: 1px solid var(--rule); border-radius: 14px; }
.kpi { padding: 16px 20px; border-left: 1px solid var(--rule); display: grid; align-content: start; position: relative; min-width: 0; }
.kpi:first-child { border-left: 0; }
.kpi .k { font-size: 13px; color: var(--ink2); }
.kpi .v { font-family: var(--serif); font-size: 30px; font-weight: 700; line-height: 1.25; }
.kpi .v small { font-family: var(--sans); font-size: 13px; font-weight: 500; color: var(--ink2); margin-left: 3px; }
.kpi .s { font-size: 12.5px; color: var(--ink3); }
.kpi .spark { position: absolute; right: 16px; top: 16px; width: 92px; }

/* 表格 */
.tbl { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 10px 10px; border-bottom: 1px solid var(--rule); vertical-align: middle; }
th { font-size: 12.5px; color: var(--ink3); font-weight: 500; white-space: nowrap; }
td.n, td .n { white-space: nowrap; }
tr.click { cursor: pointer; }
tr.click:hover td { background: #FAF8FB; }
td.cm { max-width: 260px; font-size: 13.5px; color: var(--ink2); }
td.acts { white-space: nowrap; display: flex; gap: 6px; }
.cm-edit { display: flex; gap: 6px; }
.cm-edit input { flex: 1; min-width: 140px; border: 1.5px solid var(--rule); border-radius: 8px; padding: 4px 8px; }
.spark { width: 110px; height: 30px; display: block; }

/* 表单 */
.form { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px 18px; }
.form label { display: grid; gap: 4px; font-size: 13px; color: var(--ink2); }
.form .wide { grid-column: 1 / -1; }
.form input, .form select, textarea { border: 1.5px solid var(--rule); border-radius: 9px; padding: 8px 10px; background: #fff; font-size: 14.5px; color: var(--ink); width: 100%; }
.form input:focus, .form select:focus, textarea:focus { border-color: var(--rouge); outline: none; }
fieldset { border: 0; padding: 0; margin: 0; grid-column: 1 / -1; }
legend { font-size: 13px; color: var(--ink2); margin-bottom: 6px; }
.chk { display: flex; flex-wrap: wrap; gap: 8px; }
.chk label { display: flex; align-items: center; gap: 6px; border: 1.5px solid var(--rule); border-radius: 10px; padding: 6px 12px; color: var(--ink); font-size: 14px; cursor: pointer; }
.chk label small { color: var(--ink3); }
.chk input { width: auto; }
.radio { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.radio label { display: block; border: 1.5px solid var(--rule); border-radius: 12px; padding: 12px 14px; color: var(--ink); font-size: 15px; font-weight: 700; cursor: pointer; }
.radio label small { display: block; font-weight: 400; color: var(--ink2); font-size: 13px; }
.radio input { width: auto; margin-right: 6px; }

/* 图表 */
.chart { width: 100%; height: auto; display: block; }
.chart.radar { max-width: 460px; margin: 0 auto; }
.c-grid { stroke: var(--rule); stroke-width: 1; }
.c-base { stroke: var(--ink3); stroke-width: 1; }
.c-ax { fill: var(--ink3); font-size: 11.5px; }
.c-ax2 { fill: var(--ink2); font-size: 13px; font-weight: 500; }
.c-lbl { fill: var(--ink2); font-size: 12px; font-weight: 700; }
.c-val { fill: var(--ink); font-size: 12px; font-weight: 500; }
.legend { display: flex; gap: 16px; font-size: 12.5px; color: var(--ink2); margin-bottom: 4px; flex-wrap: wrap; }
.legend i { display: inline-block; width: 18px; height: 3px; border-radius: 2px; vertical-align: middle; margin-right: 6px; }
.lp-box { fill: var(--card); stroke: #CFD0DC; stroke-width: 1.5; }
.lp-box.hot { fill: var(--rouge-soft); stroke: var(--rouge); }
.lp-n { fill: var(--ink); font-size: 14px; font-weight: 700; }
.lp-v { fill: var(--ink2); font-size: 12.5px; }
.lp-c1 { fill: var(--ink); font-family: var(--serif); font-size: 22px; font-weight: 700; }
.lp-c2 { fill: var(--ink3); font-size: 12.5px; }
.tip { position: fixed; left: 0; top: 0; z-index: 90; background: var(--lacquer); color: #fff; font-size: 12.5px; padding: 6px 10px; border-radius: 8px; pointer-events: none; opacity: 0; transition: opacity .1s; max-width: 280px; }

/* 学生首页 */
.ladder-hero { background: var(--lacquer); color: #F2F0F8; border-radius: 16px; padding: 22px 24px; display: grid; gap: 18px; }
.lh-steps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 4px; }
.lh-step { background: linear-gradient(#FFFFFF, #E9E7EF); color: var(--ink); border-radius: 0 0 9px 9px; padding: 22px 12px 10px; position: relative; }
.lh-step b { font-family: var(--serif); font-size: 18px; display: block; }
.lh-step small { font-size: 12px; color: var(--ink3); }
.lh-step.done { background: linear-gradient(#FFFFFF, #E8F1EC); }
.lh-step.done small { color: var(--good); }
.lh-step.cur { background: linear-gradient(#FCEFF4, #EED0DB); box-shadow: inset 0 4px 0 var(--rouge); }
.lh-step.cur small { color: var(--rouge-d); font-weight: 700; }
.lh-body { display: grid; gap: 10px; }
.lh-body .k { font-size: 13px; color: #B9B6CB; display: block; }
.lh-body .v { font-family: var(--serif); font-size: 34px; font-weight: 700; margin-right: 12px; }
.lh-body .s { color: #CFCCDD; font-size: 14px; }
.lh-track { height: 8px; background: #33313F; border-radius: 99px; overflow: hidden; }
.lh-track i { display: block; height: 100%; background: var(--rouge); border-radius: 99px; }
.rx { margin: 0; padding: 0; list-style: none; counter-reset: rx; display: grid; gap: 10px; }
.rx li { display: flex; gap: 12px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--rule); counter-increment: rx; }
.rx li::before { content: counter(rx); width: 26px; height: 26px; border-radius: 50%; background: var(--rouge-soft); color: var(--rouge-d); display: grid; place-items: center; font-weight: 700; font-size: 13px; flex-shrink: 0; }
.rx li div { flex: 1; min-width: 0; }
.rx p { margin: 2px 0 0; font-size: 13px; color: var(--ink2); }
.tasks, .alerts, .saved { list-style: none; margin: 0; padding: 0; display: grid; }
.tasks li, .alerts li { display: flex; gap: 10px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--rule); }
.tasks li div, .alerts li div { flex: 1; min-width: 0; }
.tasks small, .alerts small { display: block; color: var(--ink2); font-size: 12.5px; }
.saved li { padding: 4px 0; }

/* 分级练习 */
.lv-row { display: grid; grid-template-columns: 200px minmax(0, 1fr); background: var(--card); border: 1px solid var(--rule); border-radius: 14px; overflow: hidden; }
.lv-row.cur { border-color: var(--rouge); box-shadow: 0 0 0 3px var(--rouge-soft); }
.lv-tag { background: linear-gradient(90deg, #ECEAF2, #FFFFFF); padding: 18px 18px; display: grid; align-content: start; gap: 2px; border-right: 1px solid var(--rule); }
.lv-row.cur .lv-tag { background: linear-gradient(90deg, #F1D5DF, #FFF7FA); }
.lv-tag b { font-family: var(--serif); font-size: 22px; }
.lv-tag small { color: var(--ink2); font-size: 12.5px; }
.lv-pieces { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.pc { padding: 16px 18px; border-left: 1px solid var(--rule); display: grid; gap: 6px; align-content: start; }
.pc:first-child { border-left: 0; }
.pc-t b { display: block; font-size: 16px; }
.pc-t small { color: var(--ink3); font-size: 12.5px; }
.pc-s { font-size: 13px; color: var(--ink2); }
.pc-a { display: flex; gap: 6px; flex-wrap: wrap; }
.lv-row.locked { opacity: .62; }

/* 成长档案 */
.eval-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)) auto; background: var(--card); border: 1px solid var(--rule); border-radius: 14px; }
.eval-strip > div { padding: 18px 20px; border-left: 1px solid var(--rule); display: grid; align-content: start; min-width: 0; }
.eval-strip > div:first-child { border-left: 0; }
.eval-strip .k { font-size: 13px; color: var(--ink2); }
.eval-strip .v { font-family: var(--serif); font-size: 32px; font-weight: 700; line-height: 1.25; }
.eval-strip .s { font-size: 12.5px; color: var(--ink3); }
.eval-strip .act { gap: 8px; justify-items: start; align-content: center; }
.cal { display: grid; grid-template-columns: repeat(7, 1fr); gap: 5px; max-width: 360px; }
.cal i { aspect-ratio: 1; border-radius: 5px; background: #EFEFF4; }
.cal i.l1 { background: #F2C6D4; } .cal i.l2 { background: #DB7C9C; } .cal i.l3 { background: var(--rouge-d); }
.cal-key { display: flex; gap: 5px; align-items: center; font-size: 12px; color: var(--ink3); margin-top: 10px; }
.cal-key i { width: 14px; height: 14px; border-radius: 4px; background: #EFEFF4; }
.cal-key i.l1 { background: #F2C6D4; } .cal-key i.l2 { background: #DB7C9C; } .cal-key i.l3 { background: var(--rouge-d); }

/* 学生卡片（教师端） */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.scard { text-align: left; border: 1px solid var(--rule); background: var(--card); border-radius: 14px; padding: 16px 18px; cursor: pointer; display: grid; gap: 12px; }
.scard:hover { border-color: var(--ink3); }
.sc-h { display: flex; gap: 10px; align-items: center; }
.sc-h b { display: block; font-size: 16px; } .sc-h small { color: var(--ink2); font-size: 12.5px; }
.sc-va { display: grid; grid-template-columns: auto 1fr; align-items: center; column-gap: 10px; }
.sc-va .n { font-family: var(--serif); font-size: 26px; font-weight: 700; }
.sc-va small { color: var(--ink3); font-size: 12px; grid-row: 2; }
.sc-va .spark { grid-row: 1 / 3; grid-column: 2; justify-self: end; }
.sc-dims { display: grid; gap: 5px; }
.sc-dims span { display: grid; grid-template-columns: 64px 1fr 28px; align-items: center; gap: 8px; font-size: 12.5px; }
.sc-dims small { color: var(--ink2); }
.sc-dims i { display: block; height: 6px; border-radius: 3px; background: var(--s1); }
.sc-dims span { background: linear-gradient(transparent, transparent); }
.scard .pill { justify-self: start; }

/* 教学质量 */
.q-head { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 24px; align-items: center; }
.q-index { display: grid; }
.q-index .k { font-size: 13px; color: var(--ink2); }
.q-index .v { font-family: var(--serif); font-size: 64px; font-weight: 700; line-height: 1.1; color: var(--rouge-d); }
.q-index .s { font-size: 12.5px; color: var(--ink3); }
.q-parts { display: grid; gap: 10px; }
.qp { display: grid; grid-template-columns: 110px minmax(0, 1fr) 36px 140px; gap: 12px; align-items: center; font-size: 14px; }
.ql small { display: block; font-size: 11.5px; color: var(--ink3); }
.qt { height: 10px; background: #EFEFF4; border-radius: 99px; overflow: hidden; }
.qt i { display: block; height: 100%; background: var(--s2); border-radius: 99px; }
.qv { font-weight: 700; text-align: right; }
.qr { color: var(--ink2); font-size: 13px; }
.model { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.model h3 { font-size: 15px; margin-bottom: 4px; }
.model p { margin: 0; font-size: 13.5px; color: var(--ink2); }

/* 练习室 */
.pr-bar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.pr-meta { font-size: 13.5px; color: var(--ink2); margin-left: auto; }
.sheet { background: #fff; border: 1px solid var(--rule); border-radius: 14px; padding: 14px 10px 8px; overflow-x: auto; }
.sheet + .sheet { margin-top: 12px; }
.score-svg { display: block; width: 100%; height: auto; min-width: 320px; }
.cur { fill: #CFE3F3; }
.kb-wrap { background: var(--lacquer); border-radius: 14px; padding: 10px 10px 12px; }
.kb { position: relative; height: 140px; display: flex; gap: 3px; }
.wk { flex: 1; background: linear-gradient(#fff, #F1F0F6); border-radius: 0 0 7px 7px; display: flex; align-items: flex-end; justify-content: center; padding-bottom: 7px; font-size: 11px; color: var(--ink3); transition: background .08s; }
.bk { position: absolute; top: 0; height: 60%; background: linear-gradient(#3B394B, #0C0B12); border-radius: 0 0 5px 5px; z-index: 2; transition: background .08s; }
.wk.guide { background: linear-gradient(#fff, #A9D0EC); }
.wk.hit { background: linear-gradient(#fff, #EFA3BE); }
.bk.guide { background: linear-gradient(#5B8FB4, #1F5B84); }
.bk.hit { background: linear-gradient(#E0779E, #9E2A52); }
.pr-ctl { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.pr-status { font-size: 14px; color: var(--ink2); }
.rec-dot { width: 10px; height: 10px; border-radius: 50%; background: #fff; display: inline-block; }
.btn.rec .rec-dot { animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: .2; } }
.pr-alt { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 13.5px; color: var(--ink2); background: var(--card); border: 1px dashed var(--rule); border-radius: 12px; padding: 12px 14px; }
.dots { display: inline-flex; gap: 4px; margin-right: 6px; vertical-align: middle; }
.dots i { width: 6px; height: 6px; border-radius: 50%; background: var(--rouge); animation: dot 1s infinite; }
.dots i:nth-child(2) { animation-delay: .15s; } .dots i:nth-child(3) { animation-delay: .3s; }
@keyframes dot { 50% { opacity: .2; transform: translateY(-2px); } }
.result { display: grid; gap: 16px; padding-top: 6px; }
.r-head { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 18px; }
.r-score { background: var(--lacquer); color: #fff; border-radius: 14px; padding: 18px 20px; display: grid; align-content: center; }
.r-score .k { font-size: 13px; color: #B9B6CB; }
.r-score .v { font-family: var(--serif); font-size: 56px; font-weight: 700; line-height: 1.1; }
.r-score .s { font-size: 13px; color: #D5D2E2; }
.r-bub { background: var(--card); border: 1px solid var(--rule); border-radius: 14px; padding: 16px 20px; }
.r-bub .who { font-size: 12.5px; color: var(--rouge-d); font-weight: 700; }
.r-bub p { margin: 4px 0 0; font-size: 16px; }
.r-bub small { display: block; color: var(--ink3); font-size: 12px; margin-top: 6px; }
.r-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.hbar { display: grid; grid-template-columns: 70px minmax(0, 1fr) 30px 48px; gap: 10px; align-items: center; font-size: 13.5px; padding: 5px 0; }
.ht { position: relative; height: 10px; background: #EFEFF4; border-radius: 99px; }
.ht i { position: absolute; left: 0; top: 0; bottom: 0; border-radius: 99px; }
.ht i.ok { background: var(--good); } .ht i.mid { background: var(--warn); } .ht i.low { background: var(--bad); }
.ht b { position: absolute; top: -4px; bottom: -4px; width: 2px; background: var(--ink); }
.hv { font-weight: 700; text-align: right; }
.hb { font-size: 12px; color: var(--ink2); }
.issues { margin: 0; padding-left: 1.2em; font-size: 14px; }
.issues li { margin: 3px 0; }

/* 上传 */
.up-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 20px; }
.up-in { display: grid; gap: 12px; align-content: start; }
.up-in label { font-size: 13px; color: var(--ink2); display: block; margin-bottom: 4px; }
textarea { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 14px; line-height: 1.6; resize: vertical; }
.help { font-size: 13px; color: var(--ink2); margin-top: 6px; }
.help summary { cursor: pointer; color: var(--rouge-d); }
.help ul { margin: 6px 0 0; padding-left: 1.2em; }
.up-meta { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.up-meta label { display: grid; gap: 4px; margin: 0; }
.up-meta input, .up-meta select { border: 1.5px solid var(--rule); border-radius: 9px; padding: 7px 10px; font-size: 14.5px; }
.up-img { max-width: 100%; max-height: 220px; border-radius: 10px; border: 1px solid var(--rule); display: block; margin-top: 8px; }
.up-prev { min-width: 0; }
.thinking { color: var(--ink2); font-size: 14px; }

/* 弹窗与提示 */
.overlay { position: fixed; inset: 0; background: rgba(23,22,31,.5); z-index: 80; display: grid; place-items: center; padding: 20px; }
.modal { background: var(--card); border-radius: 18px; width: min(760px, 100%); max-height: calc(100vh - 40px); display: flex; flex-direction: column; box-shadow: 0 40px 80px -30px rgba(0,0,0,.5); }
.modal.wide { width: min(980px, 100%); }
.report .tbl { margin: 6px 0 14px; }
.m-head { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; border-bottom: 1px solid var(--rule); }
.m-head h2 { font-family: var(--serif); font-size: 20px; }
.x { border: 0; background: #EFEFF4; width: 34px; height: 34px; border-radius: 50%; font-size: 20px; cursor: pointer; }
.m-body { padding: 18px 26px; overflow-y: auto; }
.m-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 24px; border-top: 1px solid var(--rule); flex-wrap: wrap; }
.m-foot .src { font-size: 12.5px; color: var(--ink3); }
.report h3 { font-family: var(--serif); font-size: 17px; margin: 18px 0 6px; padding-left: 10px; border-left: 3px solid var(--rouge); }
.report h3:first-child { margin-top: 0; }
.report h4 { font-size: 15px; margin: 12px 0 4px; }
.report p { margin: 6px 0; }
.report ul, .report ol { margin: 6px 0; padding-left: 1.4em; }
.report li { margin: 4px 0; }
.toast { position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%); background: var(--lacquer); color: #fff; padding: 10px 20px; border-radius: 12px; z-index: 95; font-size: 14px; transition: opacity .4s; }
.toast.bad { background: var(--bad); }
.toast.out { opacity: 0; }

/* 登录 */
.login { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
.login-art { background: var(--lacquer); color: #F1EFF7; padding: 48px 56px 0; display: flex; flex-direction: column; position: relative; overflow: hidden; }
.la-brand { display: flex; align-items: center; gap: 12px; font-family: var(--serif); font-size: 22px; letter-spacing: .08em; }
.la-brand svg { width: 42px; height: 42px; }
.login-art h1 { font-family: var(--serif); font-size: clamp(32px, 3.6vw, 48px); line-height: 1.3; margin: 60px 0 18px; font-weight: 700; }
.login-art p { color: #C9C6D8; max-width: 34em; font-size: 15.5px; margin: 0; }
.la-loop { list-style: none; padding: 0; margin: 30px 0 0; display: flex; flex-wrap: wrap; gap: 8px; counter-reset: lp; }
.la-loop li { counter-increment: lp; border: 1px solid #3A3848; border-radius: 999px; padding: 4px 14px 4px 6px; font-size: 13.5px; color: #E2DFEC; display: flex; align-items: center; gap: 8px; }
.la-loop li::before { content: counter(lp); width: 22px; height: 22px; border-radius: 50%; background: var(--rouge); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 700; }
.la-keys { margin: auto -56px 0; display: flex; height: 120px; padding-top: 40px; }
.la-keys i { flex: 1; background: linear-gradient(#fff, #E6E4EE); border-right: 1px solid #C9C6D8; position: relative; border-radius: 0 0 5px 5px; }
.la-keys i.k::after { content: ""; position: absolute; left: -28%; top: 0; width: 56%; height: 58%; background: linear-gradient(#3B394B, #0C0B12); border-radius: 0 0 4px 4px; z-index: 1; }
.login-form { padding: 48px 56px; display: flex; flex-direction: column; justify-content: center; gap: 28px; max-width: 560px; }
.login-form h2 { font-family: var(--serif); font-size: 26px; margin-bottom: 8px; }
#loginForm { display: grid; gap: 6px; }
#loginForm label { font-size: 13px; color: var(--ink2); margin-top: 8px; }
#loginForm input { border: 1.5px solid var(--rule); border-radius: 10px; padding: 10px 12px; font-size: 15px; }
#loginForm input:focus { border-color: var(--rouge); outline: none; }
#loginForm .err { min-height: 1.4em; margin: 4px 0; }
.demo-acc h3 { font-size: 14px; color: var(--ink2); font-weight: 500; margin-bottom: 8px; }
.acc { display: flex; gap: 12px; align-items: center; width: 100%; text-align: left; border: 1.5px solid var(--rule); background: var(--card); border-radius: 12px; padding: 10px 14px; margin-bottom: 8px; cursor: pointer; font-size: 14.5px; }
.acc:hover { border-color: var(--rouge); }
.acc small { display: block; color: var(--ink2); font-size: 12.5px; }
.acc .cred { color: var(--ink3); font-family: ui-monospace, Consolas, monospace; font-size: 12px; }
.av.r-teacher { background: var(--s2); } .av.r-admin { background: var(--s3); }
.hint { font-size: 13px; color: var(--ink2); background: #ECECF2; border-radius: 12px; padding: 12px 14px; margin: 0; }

/* 窄屏 */
@media (max-width: 1100px) {
  .r-grid, .model { grid-template-columns: minmax(0, 1fr); }
  .form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .app { background: var(--paper); }
  .app { grid-template-columns: minmax(0, 1fr); }
  .side { position: static; height: auto; padding: 14px 16px; }
  .keys { flex-direction: row; overflow-x: auto; margin-top: 14px; gap: 3px; }
  .key { height: 46px; padding: 0 16px; border-radius: 0 0 8px 8px; white-space: nowrap; }
  .key.on { transform: translateY(3px); }
  .key:hover { transform: none; }
  .blk { display: none; }
  .me { margin-top: 12px; padding-left: 0; }
  .brand { padding-left: 0; }
  .main { padding: 0 16px 50px; }
  .grid2, .up-grid, .q-head, .r-head, .login { grid-template-columns: minmax(0, 1fr); }
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kpi:nth-child(3) { border-left: 0; }
  .kpi:nth-child(n+3) { border-top: 1px solid var(--rule); }
  .eval-strip { grid-template-columns: minmax(0, 1fr); }
  .eval-strip > div { border-left: 0; border-top: 1px solid var(--rule); }
  .eval-strip > div:first-child { border-top: 0; }
  .lv-row { grid-template-columns: minmax(0, 1fr); }
  .lv-tag { border-right: 0; border-bottom: 1px solid var(--rule); }
  .lh-steps { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .lh-step { padding: 14px 6px 8px; }
  .lh-step b { font-size: 15px; }
  .qp { grid-template-columns: 90px minmax(0, 1fr) 30px; }
  .qr { grid-column: 1 / -1; }
  .form, .radio { grid-template-columns: minmax(0, 1fr); }
  .login-art { padding: 28px 20px 0; }
  .login-art h1 { margin-top: 28px; }
  .la-keys { margin: 28px -20px 0; height: 80px; }
  .login-form { padding: 28px 20px; }
  .top { flex-direction: column; align-items: flex-start; }
  .kb { height: 110px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }