:root {
  --paper: #f7f2e8;
  --paper-deep: #ede4d2;
  --card: #fffdf8;
  --card-sunk: #f3ecdc;
  --ink: #2a241d;
  --ink-soft: #574e42;
  --sub: #857a68;
  --faint: #b4a992;
  --line: #e5dbc6;
  --politics: #a8503a;
  --politics-tint: #f6e7e0;
  --english: #35635a;
  --english-tint: #e2ece7;
  --gold: #b0863f;
  --correct: #2e7a57;
  --correct-tint: #e4f0e9;
  --wrong: #c1553f;
  --wrong-tint: #f8e6e0;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(42, 36, 29, .07), 0 1px 2px rgba(42, 36, 29, .04);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }

/* ---------------- 登录 ---------------- */
.login-screen {
  min-height: 100vh; display: grid; place-items: center; padding: 24px;
  background: radial-gradient(1200px 600px at 20% 0%, #fffefb, transparent), var(--paper);
}
.login-card {
  width: 100%; max-width: 380px; background: var(--card); border: 1px solid var(--line);
  border-radius: 24px; padding: 30px 28px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 14px;
}
.login-brand { display: flex; gap: 14px; align-items: center; margin-bottom: 8px; }
.login-brand h1 { font-size: 19px; margin: 0; letter-spacing: .3px; }
.login-brand p { margin: 2px 0 0; font-size: 12px; color: var(--sub); letter-spacing: 1px; }
.logo {
  width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(145deg, #3a322a, #1f1a15); color: #f7f2e8;
  font-weight: 700; font-size: 19px; letter-spacing: .5px;
}
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 12.5px; color: var(--sub); }
.login-card input {
  height: 46px; border-radius: 13px; border: 1px solid var(--line); background: #fff;
  padding: 0 14px; font-size: 15px; outline: none;
}
.login-card input:focus { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(176, 134, 63, .12); }
.login-err { color: var(--wrong); font-size: 12.5px; min-height: 18px; margin: 0; }

/* ---------------- 框架 ---------------- */
.app { display: grid; grid-template-columns: 248px 1fr; min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column;
  padding: 22px 14px 16px; border-right: 1px solid var(--line);
  background: linear-gradient(180deg, #fbf7ee, #f2ebdc);
}
.brand { display: flex; gap: 11px; align-items: center; padding: 0 8px 22px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 16px; letter-spacing: .4px; }
.brand-text span { font-size: 10.5px; letter-spacing: 3px; color: var(--sub); text-transform: uppercase; }
.nav { display: flex; flex-direction: column; gap: 3px; }
.nav-item {
  display: flex; align-items: center; gap: 11px; padding: 9px 11px; border: 0; background: transparent;
  border-radius: 11px; font-size: 14px; color: var(--ink-soft); text-align: left; width: 100%;
}
.nav-item:hover { background: rgba(255, 255, 255, .7); }
.nav-item.on { background: #fff; box-shadow: 0 2px 8px rgba(42, 36, 29, .06); color: var(--ink); font-weight: 600; }
.nav-item .ico { width: 22px; text-align: center; font-size: 15px; }
.nav-item .badge {
  margin-left: auto; font-size: 11px; font-weight: 600; color: #fff;
  background: var(--politics); border-radius: 9px; padding: 1px 7px;
}
.side-foot { margin-top: auto; display: flex; flex-direction: column; gap: 6px; padding: 0 6px; }
.countdown {
  font-size: 12px; color: var(--sub); background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;
}
.countdown b { font-size: 16px; color: var(--ink); }
.link-btn { background: none; border: 0; color: var(--sub); font-size: 12.5px; text-align: left; padding: 6px 4px; }
.link-btn:hover { color: var(--ink); }

.main { padding: 26px 32px 60px; max-width: 1180px; width: 100%; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin-bottom: 20px; flex-wrap: wrap; }
.eyebrow { font-size: 11px; font-weight: 700; letter-spacing: 2px; color: var(--gold); text-transform: uppercase; }
h1.title { font-size: 29px; margin: 4px 0 3px; letter-spacing: -.4px; font-weight: 650; }
h1.title.politics { color: var(--ink); }
.subtitle { color: var(--sub); font-size: 12.5px; margin: 0; }
.head-actions { display: flex; gap: 9px; flex-wrap: wrap; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow);
}
.card + .card { margin-top: 16px; }
.card h3 { margin: 0 0 12px; font-size: 15px; font-weight: 650; }
.row { display: flex; gap: 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.muted { color: var(--sub); font-size: 12.5px; }
.hint { color: var(--faint); font-size: 11.5px; }
.spacer { flex: 1; }
.hr { height: 1px; background: var(--line); margin: 14px 0; }

.btn {
  height: 40px; padding: 0 16px; border-radius: 12px; border: 1px solid var(--line);
  background: #fff; font-size: 14px; font-weight: 550; display: inline-flex; align-items: center;
  gap: 7px; white-space: nowrap;
}
.btn:hover { border-color: var(--faint); }
.btn.primary { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn.primary:hover { background: #3b332a; }
.btn.pol { background: var(--politics); border-color: var(--politics); color: #fff; }
.btn.eng { background: var(--english); border-color: var(--english); color: #fff; }
.btn.ghost { background: transparent; }
.btn.sm { height: 32px; padding: 0 11px; font-size: 12.5px; border-radius: 9px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.block { width: 100%; justify-content: center; }

.pill {
  display: inline-flex; align-items: center; gap: 5px; font-size: 11.5px; font-weight: 600;
  padding: 3px 9px; border-radius: 999px; background: var(--card-sunk); color: var(--ink-soft);
}
.pill.pol { background: var(--politics-tint); color: var(--politics); }
.pill.eng { background: var(--english-tint); color: var(--english); }
.pill.gold { background: #f4ead6; color: var(--gold); }
.pill.ok { background: var(--correct-tint); color: var(--correct); }
.pill.warn { background: #f4ead6; color: #a8813a; }
.pill.bad { background: var(--wrong-tint); color: var(--wrong); }

.metric { display: flex; flex-direction: column; gap: 1px; }
.metric b { font-size: 23px; letter-spacing: -.5px; font-variant-numeric: tabular-nums; }
.metric span { font-size: 11.5px; color: var(--sub); }

.ring { --p: 0; width: 104px; height: 104px; border-radius: 50%; display: grid; place-items: center;
  background: conic-gradient(var(--politics) calc(var(--p) * 1%), var(--card-sunk) 0); position: relative; }
.ring::before { content: ''; position: absolute; inset: 10px; border-radius: 50%; background: var(--card); }
.ring.sm { width: 46px; height: 46px; }
.ring.sm::before { inset: 5px; }
.ring > div { position: relative; z-index: 1; display: grid; place-items: center; text-align: center;
  font-size: 24px; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1; }
.ring.sm > div { font-size: 12px; font-weight: 600; }
.ring > div small { font-size: 9px; color: var(--faint); font-weight: 500; margin-left: 1px; }

.chip-row { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; }
.chip {
  border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 6px 13px;
  font-size: 12.5px; color: var(--ink-soft); white-space: nowrap;
}
.chip.on { background: var(--politics); border-color: var(--politics); color: #fff; font-weight: 600; }

/* ---------------- 计划 ---------------- */
.plan { display: flex; align-items: flex-start; gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--line); }
.plan:last-child { border-bottom: 0; }
.check {
  width: 22px; height: 22px; border-radius: 7px; border: 1.5px solid var(--faint); background: #fff;
  flex: none; margin-top: 1px; display: grid; place-items: center; color: #fff; font-size: 13px;
}
.check.on { background: var(--correct); border-color: var(--correct); }
.plan-t { font-size: 14px; }
.plan.done .plan-t { color: var(--faint); text-decoration: line-through; }
.progress-line { height: 4px; background: var(--card-sunk); border-radius: 3px; overflow: hidden; margin-top: 6px; }
.progress-line > i { display: block; height: 100%; background: var(--politics); border-radius: 3px; }

/* ---------------- 题目 ---------------- */
.q-stem { font-size: 18.5px; line-height: 1.85; letter-spacing: .1px; white-space: pre-wrap; }
.opt {
  display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border-radius: 14px;
  border: 1px solid var(--line); background: var(--card); width: 100%; text-align: left;
  font-size: 15px; line-height: 1.7; margin-top: 9px;
}
.opt:hover { border-color: var(--faint); }
.opt .k {
  flex: none; width: 25px; height: 25px; border-radius: 8px; background: var(--card-sunk);
  display: grid; place-items: center; font-size: 12.5px; font-weight: 700; color: var(--ink-soft);
}
.opt.pick { border-color: var(--politics); background: var(--politics-tint); }
.opt.pick .k { background: var(--politics); color: #fff; }
.opt.right { border-color: var(--correct); background: var(--correct-tint); }
.opt.right .k { background: var(--correct); color: #fff; }
.opt.wrong { border-color: var(--wrong); background: var(--wrong-tint); }
.opt.wrong .k { background: var(--wrong); color: #fff; }
.opt:disabled { cursor: default; }

.explain { margin-top: 16px; background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px; }
.explain h4 { margin: 0 0 6px; font-size: 11.5px; letter-spacing: 1px; color: var(--politics); }

/* ---------------- 手写批注 ---------------- */
.annot-wrap { position: relative; border: 1px dashed var(--line); border-radius: 14px; overflow: hidden; background: #fff; }
.annot-wrap canvas { display: block; width: 100%; touch-action: none; cursor: crosshair; }
.annot-img { width: 100%; border-radius: 14px; border: 1px solid var(--line); background: #fff; }
.annot-tools { display: flex; gap: 8px; align-items: center; margin-top: 8px; flex-wrap: wrap; }

/* ---------------- 三步背记 ---------------- */
.phrase-stage { display: flex; gap: 6px; margin-bottom: 14px; }
.phrase-stage i { flex: 1; height: 3px; border-radius: 2px; background: var(--card-sunk); }
.phrase-stage i.on { background: var(--english); }
.big-en { font-size: 26px; font-weight: 650; letter-spacing: -.3px; line-height: 1.4; }
.big-zh { font-size: 22px; font-weight: 600; line-height: 1.6; }
.choice {
  display: block; width: 100%; text-align: left; padding: 13px 15px; border-radius: 13px;
  border: 1px solid var(--line); background: #fff; margin-top: 9px; font-size: 14.5px;
  outline: none;
}
.choice:hover { border-color: var(--english); }
.choice:focus-visible { border-color: var(--english); box-shadow: 0 0 0 3px rgba(53, 99, 90, .12); }
.choice.right { border-color: var(--correct); background: var(--correct-tint); }
.choice.wrong { border-color: var(--wrong); background: var(--wrong-tint); }

input.text, textarea.text {
  width: 100%; border: 1px solid var(--line); border-radius: 13px; padding: 12px 14px;
  background: #fff; font-size: 15px; outline: none; resize: vertical;
}
input.text:focus, textarea.text:focus { border-color: var(--english); box-shadow: 0 0 0 3px rgba(53, 99, 90, .1); }
textarea.text { line-height: 1.8; min-height: 150px; }

/* ---------------- 机考式翻译 ---------------- */
.exam { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line);
  border-radius: 18px; overflow: hidden; background: var(--card); min-height: 70vh; }
.exam-left { padding: 22px; border-right: 1px solid var(--line); overflow-y: auto; max-height: 78vh; background: #fffdf9; }
.exam-right { padding: 22px; overflow-y: auto; max-height: 78vh; }
.article { font-size: 15.5px; line-height: 2; color: var(--ink-soft); white-space: pre-wrap; }
.exam-bar {
  display: flex; align-items: center; gap: 14px; padding: 12px 18px; border-bottom: 1px solid var(--line);
  background: var(--card-sunk); font-size: 13px;
}
.timer { font-variant-numeric: tabular-nums; font-size: 19px; font-weight: 700; letter-spacing: .5px; }
.timer.low { color: var(--wrong); }
.q-block { padding: 14px 0; border-bottom: 1px dashed var(--line); }
.q-block:last-child { border-bottom: 0; }
.q-en { font-size: 14px; color: var(--ink-soft); line-height: 1.75; margin-bottom: 8px; }
.score-badge { font-size: 12.5px; font-weight: 700; }

/* ---------------- 批改结果 ---------------- */
.kv { display: grid; grid-template-columns: 84px 1fr; gap: 6px 12px; font-size: 13.5px; }
.kv dt { color: var(--sub); }
.kv dd { margin: 0; }
.err-item { border-left: 3px solid var(--wrong); padding: 6px 0 6px 12px; margin: 8px 0; font-size: 13.5px; }
.up-item { border-left: 3px solid var(--english); padding: 6px 0 6px 12px; margin: 8px 0; font-size: 13.5px; }
.dim-bar { height: 6px; background: var(--card-sunk); border-radius: 3px; overflow: hidden; }
.dim-bar > i { display: block; height: 100%; background: var(--english); }

/* ---------------- 表格 ---------------- */
table.list { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.list th { text-align: left; font-weight: 600; color: var(--sub); font-size: 11.5px; letter-spacing: .5px;
  padding: 8px 10px; border-bottom: 1px solid var(--line); }
table.list td { padding: 10px; border-bottom: 1px solid var(--line); }
table.list tr:last-child td { border-bottom: 0; }
table.list tr.click:hover td { background: #fffaf0; cursor: pointer; }

/* ---------------- 浮层 ---------------- */
.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 20px); opacity: 0;
  background: rgba(42, 36, 29, .94); color: #fff; padding: 10px 18px; border-radius: 12px;
  font-size: 13.5px; pointer-events: none; transition: .22s; z-index: 90; max-width: 80vw;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.modal { position: fixed; inset: 0; background: rgba(42, 36, 29, .38); display: grid; place-items: center;
  padding: 20px; z-index: 80; }
.modal-body { background: var(--card); border-radius: 20px; padding: 24px; width: 100%; max-width: 640px;
  max-height: 86vh; overflow-y: auto; box-shadow: 0 24px 60px rgba(0, 0, 0, .18); }

.spin { width: 18px; height: 18px; border: 2px solid var(--line); border-top-color: var(--ink);
  border-radius: 50%; animation: sp .8s linear infinite; display: inline-block; }
@keyframes sp { to { transform: rotate(360deg); } }
.empty { text-align: center; color: var(--sub); padding: 40px 10px; font-size: 13.5px; }

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; flex-direction: row; align-items: center; gap: 10px;
    overflow-x: auto; padding: 10px 12px; border-right: 0; border-bottom: 1px solid var(--line); }
  .brand { padding: 0 6px 0 0; }
  .brand-text { display: none; }
  .nav { flex-direction: row; }
  .nav-item { padding: 7px 10px; }
  .nav-item span.lbl { display: none; }
  .side-foot { margin: 0; flex-direction: row; align-items: center; }
  .countdown { display: none; }
  .main { padding: 18px 16px 60px; }
  .grid2, .grid3 { grid-template-columns: 1fr; }
  .exam { grid-template-columns: 1fr; }
  .exam-left { max-height: 34vh; border-right: 0; border-bottom: 1px solid var(--line); }
  .exam-right { max-height: none; }
}