:root {
  --paper: #f7f4ec;
  --paper-2: #eeeae0;
  --line: #dcd8cd;
  --line-soft: #e8e4d9;
  --ink: #202433;
  --ink-2: #4a4d5a;
  --muted: #727368;
  --accent: #b84232;
  --accent-soft: #f5e3dd;
  --surface: #ffffff;
  --lv4: #2f6b5a;
  --lv3: #7c9a5e;
  --lv2: #d9984a;
  --lv1: #b84232;
  --lv0: #cfcabd;
  --radius: 12px;
  --serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 15px/1.65 var(--sans); font-variant-numeric: tabular-nums;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: .01em; }
h1 { font-size: 24px; }
h2 { font-size: 18px; }
h3 { font-size: 15px; }
p { margin: 0; }
img { max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

/* ---------- 顶栏 ---------- */
.top {
  position: sticky; top: 0; z-index: 10; background: rgba(247, 244, 236, .94);
  backdrop-filter: blur(6px); border-bottom: 1px solid var(--line);
}
.top-in { max-width: 1160px; margin: 0 auto; height: 58px; display: flex; align-items: center; gap: 28px; padding: 0 24px; }
.brand { font-family: var(--serif); font-size: 20px; font-weight: 700; letter-spacing: .08em; white-space: nowrap; }
.brand i { font-style: normal; color: var(--accent); }
.nav { display: flex; gap: 4px; flex: 1; overflow-x: auto; }
.nav a { padding: 7px 12px; border-radius: 8px; color: var(--ink-2); white-space: nowrap; }
.nav a.on { background: var(--ink); color: #fff; }
.nav a:not(.on):hover { background: var(--paper-2); color: var(--ink); }
.me { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; white-space: nowrap; }
.me form { margin: 0; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 28px 24px 64px; }
.narrow { max-width: 760px; }

/* ---------- 通用块 ---------- */
.card { background: var(--surface); border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 22px 24px; }
.card + .card, .stack > * + * { margin-top: 18px; }
.grid { display: grid; gap: 18px; }
.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-main { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); }
.row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.between { justify-content: space-between; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.tiny { font-size: 12px; }
.mt { margin-top: 14px; }
.mt2 { margin-top: 24px; }
.sec-title { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin: 34px 0 14px; }
.sec-title:first-child { margin-top: 0; }
.sec-title h2 { font-family: var(--serif); font-size: 19px; }
.head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 22px; }
.head h1 { font-family: var(--serif); font-size: 26px; }
.head .sub { color: var(--muted); margin-top: 4px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 38px; padding: 0 16px;
  border-radius: 9px; border: 1px solid var(--ink); background: var(--ink); color: #fff; cursor: pointer; white-space: nowrap;
}
.btn:hover { color: #fff; opacity: .92; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--ink); color: var(--ink); }
.btn.accent { background: var(--accent); border-color: var(--accent); }
.btn.sm { height: 30px; padding: 0 11px; font-size: 13px; border-radius: 7px; }
.btn.link { border: 0; background: none; color: var(--muted); padding: 0; height: auto; }
.btn.link:hover { color: var(--accent); }
.btn[disabled] { opacity: .45; cursor: not-allowed; }

.input, select.input, textarea.input {
  height: 40px; padding: 0 12px; border: 1px solid var(--line); border-radius: 9px; background: #fff; min-width: 0;
}
textarea.input { height: auto; padding: 10px 12px; }
.input:focus { outline: 2px solid rgba(184, 66, 50, .18); border-color: var(--accent); }
label.f { display: block; }
label.f > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }

.flash { background: #eef4ef; border: 1px solid #cfe0d4; color: #2f5d4c; padding: 10px 14px; border-radius: 10px; margin-bottom: 18px; }
.error { background: var(--accent-soft); border: 1px solid #ecc5bb; color: #8f2f22; padding: 10px 14px; border-radius: 10px; margin-bottom: 18px; }
.note { background: var(--paper); border: 1px dashed var(--line); padding: 10px 14px; border-radius: 10px; color: var(--ink-2); font-size: 13px; }

.chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px; background: var(--paper-2); font-size: 13px; white-space: nowrap; }
.chip.lv1 { background: #f4ddd8; color: #8f2f22; }
.chip.lv2 { background: #f7e7cf; color: #8a5a17; }
.chip.lv3 { background: #e5ecdc; color: #4b6435; }
.chip.lv4 { background: #d9e8e2; color: #22513f; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; background: var(--lv0); flex: none; }
.dot.lv1 { background: var(--lv1); } .dot.lv2 { background: var(--lv2); } .dot.lv3 { background: var(--lv3); } .dot.lv4 { background: var(--lv4); }
.tag { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 6px; border: 1px solid var(--line); color: var(--muted); white-space: nowrap; }
.tag.warn { border-color: #e8c99b; color: #8a5a17; background: #fbf3e6; }
.tag.ok { border-color: #c7dccf; color: #2f5d4c; background: #f0f6f2; }
.tag.bad { border-color: #ecc5bb; color: #8f2f22; background: #fbefec; }

/* ---------- 数字 ---------- */
.big { font-family: var(--serif); font-size: 46px; line-height: 1; font-weight: 700; }
.big small { font-size: 18px; color: var(--muted); font-weight: 400; margin-left: 4px; }
.kpi { display: flex; flex-direction: column; gap: 4px; }
.kpi b { font-family: var(--serif); font-size: 28px; line-height: 1.1; }
.kpi span { color: var(--muted); font-size: 13px; }

/* ---------- 掌握度条 ---------- */
.bar { position: relative; height: 8px; border-radius: 99px; background: var(--paper-2); overflow: hidden; min-width: 60px; }
.bar > i { position: absolute; inset: 0 auto 0 0; border-radius: 99px; background: var(--lv0); }
.bar.lv1 > i { background: var(--lv1); } .bar.lv2 > i { background: var(--lv2); }
.bar.lv3 > i { background: var(--lv3); } .bar.lv4 > i { background: var(--lv4); }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; }
table.t { width: 100%; border-collapse: collapse; }
table.t th { text-align: left; font-weight: 500; color: var(--muted); font-size: 13px; padding: 9px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.t td { padding: 10px; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
table.t tr:last-child td { border-bottom: 0; }
table.t tr.click:hover td { background: #fbfaf6; }
table.t .num { text-align: right; white-space: nowrap; }

/* ---------- 阅卷窗口 ---------- */
.upload { padding: 0; overflow: hidden; }
.upload-head { padding: 22px 24px 0; display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.upload-head h2 { font-family: var(--serif); font-size: 22px; }
.drop {
  margin: 16px 24px 0; border: 1.5px dashed #cbc5b6; border-radius: 12px; background: #fbfaf6; padding: 30px 16px;
  text-align: center; cursor: pointer; transition: border-color .15s, background .15s;
}
.drop:hover, .drop.over { border-color: var(--accent); background: #fdf6f3; }
.drop b { display: block; font-size: 16px; font-weight: 600; }
.drop .muted { margin-top: 4px; }
.drop input { display: none; }
.files { margin: 10px 24px 0; display: flex; flex-direction: column; gap: 6px; }
.files div { display: flex; justify-content: space-between; gap: 12px; font-size: 13px; padding: 6px 10px; background: var(--paper); border-radius: 8px; }
.upload-form { padding: 16px 24px 22px; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 12px; align-items: end; }
.upload-form.staff { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto; }
.upload-form.staff > :first-child { grid-column: 1 / -1; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; height: 40px; background: #fff; }
.seg label { display: flex; align-items: center; padding: 0 11px; cursor: pointer; border-left: 1px solid var(--line-soft); font-size: 14px; }
.seg label:first-child { border-left: 0; }
.seg input { display: none; }
.seg input:checked + span { color: #fff; }
.seg label:has(input:checked) { background: var(--ink); color: #fff; }
.upload-foot { padding: 10px 24px; border-top: 1px solid var(--line-soft); background: #fbfaf6; font-size: 12px; color: var(--muted); display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }

.steps4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 18px; }
.steps4 a { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border: 1px solid var(--line-soft); border-radius: 10px; background: var(--surface); }
.steps4 a:hover { border-color: var(--ink); color: var(--ink); }
.steps4 em { font-style: normal; font-family: var(--serif); font-size: 20px; color: var(--accent); width: 22px; }

/* ---------- 列表 ---------- */
.list { display: flex; flex-direction: column; }
.list > a, .list > div { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--line-soft); }
.list > :last-child { border-bottom: 0; }

/* ---------- 反馈 ---------- */
.score-head { display: grid; grid-template-columns: auto 1fr auto; gap: 28px; align-items: center; }
.sections { display: flex; gap: 22px; flex-wrap: wrap; }
.sections div { display: flex; flex-direction: column; }
.sections b { font-size: 18px; }
.sections span { font-size: 12px; color: var(--muted); }
.lead { font-size: 17px; line-height: 1.7; }
.prio { border: 1px solid var(--line-soft); border-radius: 12px; padding: 16px 18px; display: flex; flex-direction: column; gap: 8px; background: #fffdf9; }
.prio-top { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.prio-top h3 { font-size: 16px; }
.prio-top b { font-family: var(--serif); font-size: 22px; }
.prio ul { margin: 0; padding-left: 18px; color: var(--ink-2); font-size: 13px; }
.prio .cause { font-size: 13px; }
.prio .tip { font-size: 13px; color: var(--ink-2); background: var(--paper); border-radius: 8px; padding: 8px 10px; }
.prio form { margin-top: auto; }
.label { font-size: 12px; color: var(--muted); letter-spacing: .04em; }
.stackbar { display: flex; height: 12px; border-radius: 99px; overflow: hidden; background: var(--paper-2); }
.stackbar i { display: block; height: 100%; }
.et-concept { background: #5b6b8c; } .et-formula { background: #8b6db0; } .et-condition { background: #d9984a; }
.et-calc { background: #b84232; } .et-incomplete { background: #7c9a5e; } .et-blank { background: #a8a396; }
ol.actions { margin: 0; padding-left: 20px; }
ol.actions li + li { margin-top: 6px; }

.kp-module { padding: 14px 0; border-bottom: 1px solid var(--line-soft); }
.kp-module:last-child { border-bottom: 0; }
.kp-module > .row { justify-content: space-between; }
.kp-module h3 { font-size: 15px; }
.kp-topic { margin: 10px 0 0 0; }
.kp-topic-name { font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.kp-leaf { display: grid; grid-template-columns: minmax(120px, 1.3fr) minmax(80px, 2fr) 48px 72px; gap: 12px; align-items: center; padding: 5px 0; font-size: 14px; }
.kp-leaf .num { text-align: right; font-weight: 600; }
.kp-leaf .ev { font-size: 12px; color: var(--muted); white-space: nowrap; }
.kp-off { color: var(--muted); font-size: 13px; }

.qrow summary { list-style: none; cursor: pointer; display: grid; grid-template-columns: 54px 64px 86px minmax(0, 1fr) 110px 18px; gap: 10px; align-items: center; padding: 11px 4px; border-bottom: 1px solid var(--line-soft); }
.qrow summary::-webkit-details-marker { display: none; }
.qrow summary::after { content: "›"; color: var(--muted); transition: transform .15s; }
.qrow[open] summary::after { transform: rotate(90deg); }
.qrow summary:hover { background: #fbfaf6; }
.qrow .qno { font-family: var(--serif); font-weight: 700; }
.qbody { padding: 14px 4px 20px; border-bottom: 1px solid var(--line-soft); display: grid; gap: 14px; }
.stem { white-space: pre-line; line-height: 1.85; }
.crop { border: 1px solid var(--line-soft); border-radius: 8px; background: #fff; max-height: 520px; object-fit: contain; }
.qsplit { display: grid; grid-template-columns: minmax(0, 400px) minmax(0, 1fr); gap: 22px; align-items: start; }
.qsplit > :only-child { grid-column: 1 / -1; }
.crop-link { display: block; color: inherit; }
.crop.tall { width: 100%; max-height: 760px; object-position: top; }
@media (max-width: 860px) { .qsplit { grid-template-columns: 1fr; } }
.diag { border-left: 3px solid var(--accent); padding: 6px 12px; background: #fdf7f5; border-radius: 0 8px 8px 0; font-size: 14px; }
.diag + .diag { margin-top: 8px; }
.steps-t td, .steps-t th { font-size: 13px; }
.ok { color: var(--lv4); }
.bad { color: var(--accent); }

/* ---------- 图表 ---------- */
.hist { display: flex; align-items: flex-end; gap: 6px; height: 140px; padding-top: 10px; }
.hist div { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; gap: 4px; }
.hist i { display: block; width: 100%; background: var(--ink); border-radius: 5px 5px 0 0; min-height: 2px; }
.hist span { font-size: 11px; color: var(--muted); white-space: nowrap; }
.hist b { font-size: 12px; font-weight: 500; }
.nowrap { white-space: nowrap; }
.radar text { font-size: 12px; fill: var(--ink-2); }
.radar .rv { font-weight: 600; fill: var(--ink); }
.radar .ring { fill: none; stroke: var(--line); }
.radar .axis { stroke: var(--line-soft); }
.radar .me { fill: rgba(184, 66, 50, .16); stroke: var(--accent); stroke-width: 2; }
.radar .ref { fill: none; stroke: var(--muted); stroke-dasharray: 4 3; }

.heat { border-collapse: separate; border-spacing: 3px; font-size: 12px; }
.heat th { font-weight: 500; color: var(--muted); padding: 2px 4px; vertical-align: bottom; }
.heat th.v { writing-mode: vertical-rl; text-orientation: mixed; height: 120px; white-space: nowrap; text-align: left; }
.heat td { text-align: center; min-width: 38px; height: 28px; border-radius: 5px; color: #fff; }
.heat td.name { text-align: left; color: var(--ink); white-space: nowrap; padding-right: 10px; min-width: 120px; }
.heat td.lv1 { background: var(--lv1); } .heat td.lv2 { background: var(--lv2); }
.heat td.lv3 { background: var(--lv3); } .heat td.lv4 { background: var(--lv4); }
.heat td.lv0 { background: var(--paper-2); color: var(--muted); }

.qstrip { display: grid; grid-template-columns: repeat(19, minmax(0, 1fr)); gap: 4px; }
.qstrip a { display: flex; flex-direction: column; align-items: center; padding: 6px 0; border-radius: 7px; font-size: 12px; color: #fff; }
.qstrip a b { font-size: 13px; }
.qstrip a.lv1 { background: var(--lv1); } .qstrip a.lv2 { background: var(--lv2); }
.qstrip a.lv3 { background: var(--lv3); } .qstrip a.lv4 { background: var(--lv4); }
.qstrip a:hover { color: #fff; opacity: .88; }

.tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.tabs a { padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); font-size: 13px; background: #fff; }
.tabs a.on { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ---------- 组卷 / 试卷 ---------- */
.pick { display: grid; grid-template-columns: 22px 44px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 9px 0; border-bottom: 1px solid var(--line-soft); cursor: pointer; }
.pick:last-child { border-bottom: 0; }
.pick input { width: 16px; height: 16px; accent-color: var(--accent); }
.pick .qno { font-family: var(--serif); font-weight: 700; }
.paper { background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 42px 54px; }
.paper h1 { font-family: var(--serif); text-align: center; font-size: 24px; }
.paper .meta { text-align: center; color: var(--muted); font-size: 13px; margin-top: 6px; }
.pq { margin-top: 26px; break-inside: avoid; }
.pq-head { display: flex; gap: 10px; align-items: baseline; }
.pq-head b { font-family: var(--serif); }
.opts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 28px; margin-top: 8px; padding-left: 26px; }
.opts.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.space { height: 120px; }
.answer-key { margin-top: 40px; padding-top: 20px; border-top: 2px solid var(--ink); }
.answer-key .pq { margin-top: 16px; font-size: 14px; }

/* ---------- 登录 ---------- */
.login-page { min-height: 100vh; display: grid; grid-template-columns: 1.1fr 1fr; }
.login-art { background: var(--ink); color: #f7f4ec; padding: 56px; display: flex; flex-direction: column; justify-content: space-between; }
.login-art .brand { color: #fff; font-size: 26px; }
.login-art h1 { font-family: var(--serif); font-size: 40px; line-height: 1.35; font-weight: 600; }
.login-art h1 em { font-style: normal; color: #edb5a9; }
.login-art ol { list-style: none; padding: 0; margin: 28px 0 0; display: flex; gap: 22px; color: #c9c5b9; font-size: 14px; }
.login-art ol li b { font-family: var(--serif); color: #edb5a9; margin-right: 6px; }
.login-box { display: flex; align-items: center; justify-content: center; padding: 40px; }
.login-box form { width: 100%; max-width: 360px; display: flex; flex-direction: column; gap: 16px; }
.login-box h2 { font-family: var(--serif); font-size: 24px; }

@media (max-width: 900px) {
  .g2, .g3, .g4, .g-main { grid-template-columns: 1fr; }
  .upload-form, .upload-form.staff { grid-template-columns: 1fr; }
  .steps4 { grid-template-columns: repeat(2, 1fr); }
  .score-head { grid-template-columns: 1fr; gap: 16px; }
  .login-page { grid-template-columns: 1fr; }
  .login-art { padding: 32px; }
  .login-art h1 { font-size: 28px; }
  .qrow summary { grid-template-columns: 44px 56px 70px minmax(0, 1fr) 18px; }
  .qrow summary .hide-m { display: none; }
  .kp-leaf { grid-template-columns: minmax(100px, 1fr) minmax(60px, 1fr) 44px; }
  .kp-leaf .ev { display: none; }
  .paper { padding: 24px 18px; }
  .top-in { gap: 14px; padding: 0 14px; }
  .me .who { display: none; }
  .wrap { padding: 20px 14px 48px; }
  .qstrip { grid-template-columns: repeat(10, minmax(0, 1fr)); }
}

@media print {
  body { background: #fff; font-size: 13.5px; }
  .top, .no-print, .flash { display: none !important; }
  .wrap { padding: 0; max-width: none; }
  .paper { border: 0; padding: 0; }
  .answer-key { break-before: page; }
}