:root {
  /* 明亮清新色板 */
  --bg: #f3fbfb;
  --panel: #ffffff;
  --ink: #14323d;
  --muted: #46616d;
  --line: #e2f0f1;
  --primary: #0ea5e9;
  --primary-d: #0284c7;
  --accent: #f59e0b;
  --ok: #10b981;
  --ok-bg: #e7fbf2;
  --err: #f43f5e;
  --err-bg: #ffeef1;
  --choice: #8b5cf6;
  --material: #fb923c;
  /* 鲜明功能色 */
  --c-teal: #14b8a6;
  --c-sky: #0ea5e9;
  --c-pink: #ec4899;
  --c-amber: #f59e0b;
  --c-coral: #fb7185;
  --c-violet: #8b5cf6;
  --c-lime: #84cc16;
  --shadow: 0 14px 38px rgba(20, 80, 110, 0.12);
  --shadow-sm: 0 6px 18px rgba(20, 80, 110, 0.09);
  --radius: 16px;
  --grad-brand: linear-gradient(120deg, #06b6d4 0%, #3b82f6 52%, #8b5cf6 100%);
  --grad-choice: linear-gradient(135deg, #14b8a6, #0ea5e9);
  --grad-material: linear-gradient(135deg, #fb923c, #f59e0b);
  --grad-ok: linear-gradient(135deg, #10b981, #22c55e);
  --grad-soft: linear-gradient(135deg, #e6fbff, #eafbf2);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  line-height: 1.65;
  background:
    radial-gradient(820px 520px at 8% -10%, rgba(20, 184, 166, 0.18), transparent 58%),
    radial-gradient(760px 460px at 96% -2%, rgba(236, 72, 153, 0.15), transparent 55%),
    radial-gradient(680px 460px at 50% 112%, rgba(14, 165, 233, 0.16), transparent 60%),
    linear-gradient(160deg, #e3f9fb 0%, #ecfbf0 42%, #f6effb 100%);
  background-attachment: fixed;
  min-height: 100vh;
}
/* ===== 框架布局：侧边栏 + 内容区 ===== */
.layout { display: flex; align-items: stretch; min-height: 100vh; }
/* 侧边栏（框架骨架 + 鲜明配色） */
.sidebar {
  width: 236px; flex: 0 0 236px; align-self: flex-start; position: sticky; top: 0;
  height: 100vh; display: flex; flex-direction: column; gap: 6px;
  background: linear-gradient(180deg, #0e7490 0%, #0e7490 6%, #155e75 52%, #1e3a8a 100%);
  color: #eafcff; padding: 20px 14px;
  box-shadow: 5px 0 28px rgba(8, 47, 73, 0.30); z-index: 30;
}
.side-brand { display: flex; align-items: center; gap: 11px; padding: 6px 8px 16px; }
.side-brand .brand-badge {
  width: 44px; height: 44px; border-radius: 13px; font-size: 23px;
  background: rgba(255, 255, 255, .16); display: inline-flex; align-items: center; justify-content: center;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .22);
}
.side-brand .b-t { font-size: 15.5px; font-weight: 800; letter-spacing: .3px; line-height: 1.3; }
.side-brand .b-s { font-size: 11.5px; opacity: .8; margin-top: 3px; }
.nav { display: flex; flex-direction: column; gap: 6px; margin-top: 4px; }
.nav-btn {
  display: flex; align-items: center; gap: 12px; width: 100%;
  border: none; background: transparent; color: #d6f3fb; cursor: pointer;
  font-size: 14.5px; font-weight: 600; padding: 11px 13px; border-radius: 12px;
  text-align: left; transition: background .15s, color .15s, transform .12s; position: relative;
}
.nav-btn .ico { font-size: 18px; width: 22px; text-align: center; }
.nav-btn .lab { flex: 1; }
.nav-btn:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.nav-btn.active {
  background: linear-gradient(120deg, rgba(255, 255, 255, .96), rgba(224, 247, 250, .9));
  color: #0e5a6e; font-weight: 800; box-shadow: 0 8px 18px rgba(0, 0, 0, .18);
}
.nav-btn.active::before {
  content: ""; position: absolute; left: 0; top: 9px; bottom: 9px; width: 4px;
  border-radius: 0 4px 4px 0; background: var(--accent);
}
.nav-btn .badge {
  background: var(--err); color: #fff; font-size: 11px; font-weight: 800;
  min-width: 20px; height: 20px; padding: 0 6px; border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
}
.side-foot { margin-top: auto; padding-top: 14px; border-top: 1px solid rgba(255, 255, 255, .16); }
.side-foot #apiStatus { color: #eafcff; }
.side-tip { font-size: 11.5px; opacity: .72; margin-top: 10px; text-align: center; }
/* 内容区 */
.content { flex: 1; min-width: 0; display: flex; flex-direction: column; }
header.topbar {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, .86); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  padding: 13px 22px; display: flex; align-items: center; justify-content: space-between;
  box-shadow: 0 4px 16px rgba(20, 80, 110, .07);
}
header.topbar #pageTitle { font-size: 17px; font-weight: 800; color: var(--ink); display: flex; align-items: center; gap: 8px; }
header.topbar #pageTitle::before { content: ""; width: 6px; height: 18px; border-radius: 3px; background: var(--grad-brand); display: inline-block; }
header.topbar .top-hint { font-size: 12px; color: var(--muted); }
.bottomnav { display: none; }
main { max-width: 940px; width: 100%; margin: 20px auto 40px; padding: 0 18px; flex: 1; }
/* 全屏专注模式：练习 / 测验模块进入独立界面，隐藏主框架侧栏、顶栏与底栏 */
body.qm .sidebar, body.qm header.topbar, body.qm .footer-note, body.qm .bottomnav { display: none !important; }
body.qm .layout { display: block; }
body.qm .content { display: block; height: 100vh; overflow-y: auto; padding: 0; }
body.qm main#app { max-width: 940px; width: 100%; margin: 0 auto; padding: 0 16px; flex: none; }
.qm-bar { position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); margin: 0 -16px 14px; }
.qm-bar-title { font-weight: 800; font-size: 15px; color: var(--ink); }

/* 首页彩色 hero 横幅 */
.hero {
  border-radius: var(--radius);
  background: linear-gradient(120deg, #06b6d4 0%, #3b82f6 55%, #8b5cf6 100%);
  color: #fff; padding: 26px 26px; margin-bottom: 18px;
  box-shadow: 0 16px 36px rgba(6, 182, 212, 0.32);
  position: relative; overflow: hidden;
  animation: fadeUp .42s ease both;
}
.hero h2 { margin: 0 0 8px; font-size: 23px; font-weight: 800; text-shadow: 0 1px 2px rgba(0,0,0,.12); }
.hero p { margin: 0 0 18px; opacity: .92; font-size: 14px; max-width: 560px; }
.hero .btn {
  background: #fff; color: var(--primary-d); box-shadow: 0 6px 16px rgba(0,0,0,.14);
}
.hero .btn:hover { background: #f0fbff; }
.hero .blob {
  position: absolute; border-radius: 50%; filter: blur(2px); opacity: .22;
  width: 160px; height: 160px;
}
.hero .b1 { background: #5eead4; right: -30px; top: -40px; }
.hero .b2 { background: #f9a8d4; right: 90px; bottom: -70px; width: 120px; height: 120px; }
.hero .b3 { background: #fcd34d; right: 200px; top: 30px; width: 90px; height: 90px; }

/* cards & layout */
.card {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 22px;
  margin-bottom: 18px;
  border: 1px solid rgba(255,255,255,.8);
  animation: fadeUp .42s ease both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.spacer { flex: 1; }
.muted { color: var(--muted); font-size: 13px; }
h2.sec { font-size: 18px; margin: 0 0 14px; display: flex; align-items: center; gap: 8px; }
h2.sec::before {
  content: ""; width: 5px; height: 18px; border-radius: 3px;
  background: var(--grad-brand); display: inline-block;
}
h3 { font-size: 15px; margin: 0 0 8px; }

/* dashboard stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(155px, 1fr)); gap: 14px; }
.stat {
  background: var(--panel); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); padding: 18px 16px; text-align: center;
  position: relative; overflow: hidden; border: 1px solid rgba(255,255,255,.8);
  transition: transform .18s, box-shadow .18s;
}
.stat:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.stat::after {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 5px;
  background: var(--bar, var(--primary));
}
.stat .ico {
  font-size: 26px; line-height: 1; margin-bottom: 6px;
  width: 50px; height: 50px; margin: 0 auto 8px; border-radius: 15px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bar-bg, #e6f8fb); box-shadow: 0 6px 14px var(--bar-shadow, rgba(14,165,233,.2));
}
.stat .num { font-size: 30px; font-weight: 800; color: var(--bar, var(--primary)); }
.stat .lbl { font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.stat-clickable { cursor: pointer; }
.stat-clickable:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.stat-clickable:active { transform: translateY(-1px); }
.stat-go { font-size: 11px; color: var(--primary); font-weight: 600; margin-top: 8px; }
.stat-clickable:hover .stat-go { text-decoration: underline; }
.stat.s-choice { --bar: #8b5cf6; --bar-bg: #f1eaff; --bar-shadow: rgba(139,92,246,.25); }
.stat.s-material { --bar: #fb923c; --bar-bg: #fff0e3; --bar-shadow: rgba(251,146,60,.25); }
.stat.s-module { --bar: #0ea5e9; --bar-bg: #e6f6ff; --bar-shadow: rgba(14,165,233,.25); }
.stat.s-wrong { --bar: #f43f5e; --bar-bg: #ffeef1; --bar-shadow: rgba(244,63,94,.25); }

/* type chips */
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 11px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: #e6f8fb; color: var(--primary); margin: 0 6px 6px 0;
}
.chip.choice { background: #f1eaff; color: var(--choice); }
.chip.material { background: #fff0e3; color: var(--material); }
.chip.subjective { background: #e3f3ff; color: #0369a1; }
.exam-clock {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 5px 12px; border-radius: 999px; font-size: 13px; font-weight: 700;
  background: #eef6ff; color: #0369a1; border: 1px solid #cfe3ff;
}
.exam-clock.warn { background: #fff1f2; color: #b91c1c; border-color: #f3c2c2; animation: clockPulse 1s infinite; }
@keyframes clockPulse { 50% { opacity: 0.55; } }

/* feature cards (首页功能入口) */
.feature-card {
  flex: 1; min-width: 210px; border-radius: 16px; padding: 20px 18px 16px;
  background: var(--panel); border: 1px solid var(--line);
  box-shadow: var(--shadow-sm); cursor: default; transition: transform .18s, box-shadow .18s, border-color .18s;
  display: flex; flex-direction: column; gap: 8px;
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #c7ecf2; }
.feature-card .fic {
  width: 50px; height: 50px; border-radius: 15px; display: inline-flex;
  align-items: center; justify-content: center; font-size: 26px; color: #fff;
  box-shadow: 0 8px 18px rgba(14,165,233,.32);
}
.feature-card.c1 .fic { background: var(--grad-choice); }
.feature-card.c2 .fic { background: var(--grad-material); }
.feature-card.c3 .fic { background: var(--grad-ok); }
.feature-card h3 { font-size: 16px; margin: 4px 0 0; }
.feature-card p.muted { margin: 0; flex: 1; }
.feature-card .arr {
  align-self: flex-end; color: var(--primary); font-weight: 700; font-size: 14px;
  display: inline-flex; align-items: center; gap: 4px; margin-top: 4px;
}
.feature-card .btn { align-self: flex-start; }

/* buttons */
.btn {
  border: none; background: var(--grad-brand); color: #fff;
  padding: 11px 20px; border-radius: 11px; font-size: 14px; font-weight: 700;
  cursor: pointer; transition: transform .12s, box-shadow .12s, filter .12s;
  box-shadow: 0 6px 16px rgba(6, 182, 212, 0.3);
}
.btn:hover { filter: brightness(1.06); transform: translateY(-2px); box-shadow: 0 10px 22px rgba(6,182,212,.36); }
.btn:active { transform: translateY(1px); filter: brightness(.92); box-shadow: inset 0 0 0 2px rgba(2,132,199,.35); }
.btn.ghost:active { background: #bfe9f2; color: var(--primary-d); box-shadow: inset 0 0 0 2px rgba(2,132,199,.5); }
.btn.ghost { background: #e6f8fb; color: var(--primary); box-shadow: none; }
.btn.ghost:hover { background: #d2f2f8; }
.btn.danger { background: #fdeae6; color: var(--err); box-shadow: none; border: 1px solid #f3c8bf; }
.btn.danger:hover { background: #fbddd6; }
.btn.danger:disabled { opacity: .6; cursor: not-allowed; }
.btn.warn { background: var(--err); box-shadow: 0 6px 16px rgba(244,63,94,.3); }
.btn.warn:hover { filter: brightness(1.05); }
.btn.ok { background: var(--grad-ok); box-shadow: 0 6px 16px rgba(16,185,129,.3); }
.btn.ok:hover { filter: brightness(1.05); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
.btn.sm { padding: 7px 13px; font-size: 13px; box-shadow: none; }

/* question block */
.q-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.q-stem { font-size: 16px; font-weight: 600; margin-bottom: 14px; white-space: pre-wrap; }
.opt {
  position: relative; display: block; width: 100%; text-align: left;
  border: 1.5px solid var(--line); background: #fcfffe; border-radius: 11px;
  padding: 12px 44px 12px 14px; margin-bottom: 10px; font-size: 15px; cursor: pointer;
  transition: border-color .12s, background .12s, transform .08s;
}
.opt:hover { border-color: var(--primary); background: #eafaff; }
.opt:active { transform: scale(.995); }
.opt.sel { border-color: var(--primary); background: #e2f6ff; box-shadow: inset 3px 0 0 var(--primary); }
.opt.correct { border-color: var(--ok); background: var(--ok-bg); color: #0a6b4b; font-weight: 600; box-shadow: inset 3px 0 0 var(--ok); }
.opt.wrong { border-color: var(--err); background: var(--err-bg); color: #b21530; font-weight: 600; box-shadow: inset 3px 0 0 var(--err); }
.opt .lab { display: inline-block; width: 22px; font-weight: 700; color: var(--primary); }
.opt.correct .lab, .opt.wrong .lab { color: inherit; }
.opt::after {
  position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
  font-size: 16px; font-weight: 800; opacity: 0; transition: opacity .15s;
}
.opt.sel::after { content: "✔"; color: var(--primary); opacity: 1; }
.opt.correct::after { content: "✔"; color: var(--ok); opacity: 1; }
.opt.wrong::after { content: "✘"; color: var(--err); opacity: 1; }

/* material block */
.material-box {
  background: #f3fcfb; border: 1px solid var(--line);
  border-left: 4px solid var(--material); border-radius: 9px;
  padding: 12px 14px; margin-bottom: 12px; font-size: 14px; white-space: pre-wrap;
}
.material-box .mt { font-weight: 700; color: var(--material); display: block; margin-bottom: 4px; }
.subq { border-top: 1px dashed var(--line); padding-top: 12px; margin-top: 12px; }
.subq .sq { font-weight: 600; margin-bottom: 8px; }
.ref-box {
  background: var(--ok-bg); border: 1px solid #b6ecd6; border-left: 4px solid var(--ok);
  border-radius: 9px; padding: 12px 14px; margin-top: 10px; font-size: 14px; white-space: pre-wrap;
}
.analysis-box {
  background: linear-gradient(180deg, #fff8ec, #fff3dd);
  border: 1px solid #f7dca0; border-left: 4px solid var(--accent);
  border-radius: 9px; padding: 12px 14px; margin-top: 14px; font-size: 14px; white-space: pre-wrap;
}
.analysis-box::before { content: "💡 "; font-size: 14px; }
.feedback { font-weight: 700; margin: 12px 0 0; }
.feedback.ok { color: var(--ok); }
.feedback.no { color: var(--err); }

/* progress */
.progress {
  font-size: 13px; color: var(--muted); margin-bottom: 12px;
  background: var(--grad-soft); border: 1px solid #cdeef2; border-radius: 10px; padding: 9px 13px;
}

/* wrong list */
.wrong-item {
  border: 1px solid var(--line); border-left: 5px solid var(--muted);
  border-radius: 12px; padding: 14px 16px; margin-bottom: 12px; background: #fff;
  transition: transform .15s, box-shadow .15s;
}
.wrong-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.wrong-item.t-choice { border-left-color: var(--choice); }
.wrong-item.t-material { border-left-color: var(--material); }
.wrong-item .wt { font-weight: 700; font-size: 15px; margin-bottom: 6px; white-space: pre-wrap; }
.wrong-item .meta { font-size: 12px; color: var(--muted); margin: 6px 0; }
.empty {
  text-align: center; color: var(--muted); padding: 46px 0;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.empty .big { font-size: 46px; }
.wrong-toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.wrong-toolbar .count {
  background: var(--err-bg); color: var(--err); font-weight: 700; font-size: 13px;
  padding: 5px 12px; border-radius: 999px;
}

/* modal */
.modal-mask {
  position: fixed; inset: 0; background: rgba(20, 50, 60, .5);
  display: none; align-items: flex-start; justify-content: center;
  padding: 40px 16px; z-index: 50; overflow: auto; backdrop-filter: blur(3px);
}
.modal-mask.show { display: flex; }
.modal {
  background: #fff; border-radius: var(--radius); max-width: 720px; width: 100%;
  padding: 22px; box-shadow: var(--shadow); animation: fadeUp .3s ease both;
}
.modal h3 { margin-top: 0; }
.modal-close {
  position: sticky; top: 0; float: right; border: none; background: #e6f8fb; color: var(--muted);
  width: 30px; height: 30px; border-radius: 50%; cursor: pointer; font-size: 16px; line-height: 1;
}
.modal-close:hover { background: #d2f2f8; color: var(--ink); }
.modal-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 6px; }
.modal-head h3 { margin: 0; }
.modal-head .btn { flex: none; }

/* 花名册管理（v5.62） */
.roM-toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 10px 0; }
.roM-search { flex: 1; min-width: 140px; padding: 9px 11px; border: 1.5px solid var(--line); border-radius: 10px; font-size: 14px; box-sizing: border-box; }
.roM-search:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(14,165,233,.14); }
.roM-wrap { max-height: 56vh; overflow: auto; border: 1px solid var(--line); border-radius: 12px; }
.roM-table input { width: 100%; padding: 7px 9px; border: 1.4px solid var(--line); border-radius: 8px; font-size: 13px; box-sizing: border-box; background: #fff; }
.roM-table input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(14,165,233,.14); }
.roM-table thead th { position: sticky; top: 0; background: #f3f7fd; z-index: 1; }
.roM-table td, .roM-table th { padding: 6px 8px; }

/* settings */
.setting-row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.setting-row label { font-weight: 600; font-size: 14px; }
.setting-row input, .setting-row select {
  padding: 11px 13px; border: 1.5px solid var(--line); border-radius: 10px; font-size: 14px;
  transition: border-color .12s, box-shadow .12s; background: #fff;
}
.setting-row input:focus, .setting-row select:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(14,165,233,.16);
}
.hint { font-size: 12px; color: var(--muted); }

/* 分享弹窗中的考试名称 */
.share-exam-name {
  font-size: 18px; font-weight: 800; color: var(--primary);
  background: #eef6ff; border: 1px solid #cfe4ff; border-radius: 10px;
  padding: 9px 14px; margin: 4px 0 12px; text-align: center; word-break: break-word;
}
.share-exam-name.small {
  font-size: 14px; font-weight: 700; color: #1f4fa3;
  background: transparent; border: none; padding: 0 0 8px; margin: 0;
}
.loader { display: inline-block; width: 16px; height: 16px; border: 2px solid #fff; border-top-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; vertical-align: -3px; margin-right: 6px; }
.loader.dark { border-color: var(--primary); border-top-color: transparent; }
@keyframes spin { to { transform: rotate(360deg); } }
.tag-api { background: #e7fbf2; color: #0a9d66; border: 1px solid #b6ecd6; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 700; display: inline-flex; align-items: center; gap: 4px; }
.tag-api::before { content: "🤖"; }
.hidden { display: none !important; }
kbd { background:#e6f8fb; border:1px solid var(--line); border-radius:6px; padding:1px 6px; font-size:12px; }
.footer-note { text-align:center; color:var(--muted); font-size:12px; margin-top:20px; }

/* 原卷配图 */
.q-img {
  max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: 10px;
  display: block; margin: 0 auto 12px; max-height: 380px; background: #fff;
  box-shadow: var(--shadow-sm);
}
/* v5.70：选择题配图置于题干之下（与材料题一致） */
.q-stem-img { margin-top: 14px; }

/* 完成页装饰 */
.done-banner {
  text-align: center; padding: 14px 0 4px;
  background: linear-gradient(135deg, #e7fbf2, #e6f6ff);
  border: 1px solid #c7ecd6;
}
.done-banner .em { font-size: 40px; }

/* ===== v5.64：练习后"提醒参加测验"卡片 ===== */
.remind-box {
  display: flex; gap: 12px; align-items: flex-start;
  margin: 16px 0 0; padding: 14px 16px;
  background: linear-gradient(135deg, #eff6ff, #f0fdfa);
  border: 1px solid #bfe3ff; border-radius: 14px;
}
.remind-ico { font-size: 26px; line-height: 1.2; flex: 0 0 auto; }
.remind-main { flex: 1 1 auto; min-width: 0; }
.remind-title { font-weight: 700; color: #0f4c81; font-size: 15px; }
.remind-sub { font-size: 13px; color: var(--muted); margin-top: 2px; line-height: 1.5; }
.remind-exams { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.remind-actions { margin-top: 10px; }


/* ===== 层次感增强 ===== */
/* 头部/导航浮层 */
header.topbar { box-shadow: 0 12px 34px rgba(6, 182, 212, 0.30); }
nav.tabs {
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 6px 18px rgba(20, 80, 110, 0.10);
}
/* 练习题号网格导航（主-次层次 + 进度感） */
.qnav {
  display: flex; flex-wrap: wrap; align-items: center; gap: 7px;
  background: linear-gradient(180deg, #ffffff, #f2fbfb);
  border: 1px solid var(--line); border-radius: 14px;
  padding: 12px 14px; margin-bottom: 14px; box-shadow: var(--shadow-sm);
  animation: fadeUp .42s ease both;
}
.qnav .qlabel { width: 100%; font-size: 12.5px; color: var(--muted); font-weight: 600; margin-bottom: 2px; }
.qn {
  min-width: 32px; height: 32px; padding: 0 6px; border-radius: 9px;
  border: 1.5px solid var(--line); background: #fff; color: var(--muted);
  font-weight: 700; font-size: 13px; display: inline-flex; align-items: center; justify-content: center;
  transition: transform .15s, box-shadow .15s, border-color .15s, color .15s;
}
.qn.cur { background: var(--grad-brand); color: #fff; border-color: transparent; box-shadow: 0 6px 14px rgba(6,182,212,.32); transform: translateY(-2px); }
.qn.ok { background: #e7fbf2; color: #0a9d66; border-color: #b6ecd6; }
.qn.no { background: #ffeef1; color: #d11a3a; border-color: #f6c2cb; }
.qn.done { background: #e6f6ff; color: var(--primary); border-color: #b9e4fb; }
/* 题目内部分区层次：信息条 → 题干块 → 材料块 → 解析块 */
.q-meta {
  background: linear-gradient(180deg, #f4fbfb, #ffffff);
  border: 1px solid var(--line); border-left: 4px solid var(--primary);
  border-radius: 10px; padding: 10px 12px; margin-bottom: 14px;
}
.card .q-stem {
  background: #fbfeff; border: 1px solid #eef6f8; border-radius: 12px;
  padding: 14px 16px;
}
/* 错题集按类型分组（组级 → 条目级） */
.wrong-group { margin-bottom: 18px; }
.group-title {
  display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 800;
  color: var(--ink); margin: 4px 2px 10px;
}
.group-title::before { content: ""; width: 6px; height: 18px; border-radius: 3px; display: inline-block; background: var(--grad-choice); }
.group-title.material::before { background: var(--grad-material); }
.group-title .gt-count { font-size: 12px; font-weight: 700; color: var(--muted); background: #eef6f8; padding: 2px 9px; border-radius: 999px; }

/* ===== 学生账号 / 老师后台 ===== */
.tabs2 { display: flex; gap: 8px; margin-bottom: 14px; }
.atab {
  border: 1px solid var(--line); background: var(--panel); color: var(--muted);
  padding: 9px 18px; border-radius: 11px; cursor: pointer; font-weight: 600; transition: .15s;
}
.atab.active { background: var(--grad-brand); color: #fff; border-color: transparent; box-shadow: 0 6px 16px rgba(6,182,212,.3); }
.auth-user {
  background: linear-gradient(135deg, #ecfdf5, #e0f2fe);
  border: 1px solid #bbf7d0; border-radius: 14px; padding: 16px;
}
.auth-user p { margin: 8px 0; }
.table-wrap { overflow-x: auto; margin-top: 10px; border-radius: 12px; border: 1px solid var(--line); }
table.grid { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 540px; }
table.grid th, table.grid td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.grid thead th { background: linear-gradient(135deg, #f0f9ff, #ecfeff); color: #0e7490; font-weight: 700; position: sticky; top: 0; }
table.grid tbody tr:nth-child(even) { background: #f8fafc; }
table.grid tbody tr:hover { background: #ecfeff; }
#roCsv { border: 1px solid var(--line); border-radius: 10px; padding: 10px; }

/* ===== 手机端适配 ===== */
@media (max-width: 640px) {
  .layout { display: block; }
  .sidebar { display: none; }
  header.topbar { padding: 12px 14px; position: static; }
  header.topbar #pageTitle { font-size: 15px; }
  header.topbar .top-hint { display: none; }
  main { margin: 14px auto 84px; padding: 0 12px; }
  .bottomnav {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 40;
    background: rgba(255, 255, 255, .96); backdrop-filter: blur(10px);
    border-top: 1px solid var(--line); box-shadow: 0 -6px 20px rgba(20, 80, 110, .12);
    padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
  }
  .bottomnav .nav-btn { flex-direction: column; gap: 2px; padding: 6px 4px; font-size: 11px; flex: 1; border-radius: 10px; color: var(--muted); }
  .bottomnav .nav-btn .ico { font-size: 21px; width: auto; }
  .bottomnav .nav-btn .lab { font-size: 11px; }
  .bottomnav .nav-btn.active { background: var(--grad-soft); color: var(--primary-d); box-shadow: none; }
  .bottomnav .nav-btn.active::before { display: none; }
  .bottomnav .nav-btn { position: relative; }
  .bottomnav .badge { position: absolute; top: 3px; right: 50%; margin-right: -24px; min-width: 18px; height: 18px; font-size: 10px; padding: 0 5px; }
  .card { padding: 16px 14px; border-radius: 14px; }
  .q-stem { font-size: 15.5px; }
  .opt { padding: 14px 42px 14px 12px; font-size: 15px; }
  .btn { padding: 12px 16px; font-size: 14px; }
  .btn.sm { padding: 9px 12px; }
  .stat { padding: 14px 10px; }
  .stat .num { font-size: 24px; }
  .material-box { font-size: 13.5px; padding: 10px 12px; }
  .modal-mask { padding: 16px 8px; }
  .q-img { max-height: 300px; }
  .feature-card { min-width: 100%; }
  .row { gap: 8px; }
  .qnav { gap: 6px; padding: 10px; }
  .qn { min-width: 29px; height: 30px; font-size: 12px; }
  .card .q-stem { padding: 12px; }
  .group-title { font-size: 14px; }
}

/* 答题评价徽章 */
.eval-badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:700;line-height:1.6;color:#fff;white-space:nowrap}
.eval-badge.lv0{background:#9aa3b2}
.eval-badge.lv1{background:#ef6c5a}
.eval-badge.lv2{background:#f0a93b}
.eval-badge.lv3{background:#3aa0ff}
.eval-badge.lv4{background:#2bb673}
.eval-text{margin-top:4px;font-size:12px;color:var(--muted);line-height:1.5;max-width:260px}
.auth-login{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.auth-login input{flex:1 1 140px;min-width:120px}

/* 模拟测验 · 结果 / 建议 / 回顾 */
.feature-card.c4 .fic { background: var(--grad-module); }
/* 课堂小测 / 我的记录 */
.feature-card.c5 .fic { background: linear-gradient(135deg, #f43f5e, #f59e0b); }
.feature-card.c6 .fic { background: linear-gradient(135deg, #6366f1, #06b6d4); }
.result-card{text-align:center}
.result-card .em{font-size:40px}
.score-big{font-size:42px;font-weight:800;color:var(--accent);margin:6px 0}
.score-big .score-tot{font-size:18px;color:var(--muted);font-weight:600}
.sug-box{background:linear-gradient(135deg,#fff7ed,#fff);border:1px solid #ffe2c2;border-radius:14px;padding:14px 16px;line-height:1.7}
.rev-list{display:flex;flex-direction:column;gap:8px;margin-top:6px}
.rev-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:10px;background:#f7f9fc;border-left:4px solid #cdd6e4;font-size:14px}
.rev-item.ok{border-left-color:var(--ok)}
.rev-item.no{border-left-color:var(--err)}
.rev-item .rev-no{width:22px;height:22px;border-radius:50%;background:#e6ebf3;color:#46506b;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.rev-item .rev-st{flex:1;color:#46506b;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rev-item .rev-r{font-size:12px;font-weight:700;flex:0 0 auto}
.rev-item.ok .rev-r{color:var(--ok)}
.rev-item.no .rev-r{color:var(--err)}
.rev-analysis{margin:-2px 0 8px 44px;padding:8px 12px;border-radius:0 0 10px 10px;background:#fff7f7;border-left:4px solid var(--err);font-size:13px;color:#7a4b4b;line-height:1.55}
.rev-analysis b{color:#b23b3b}
/* v5.57：模拟考后「答错题目明细」卡片 */
.rev-detail-list{display:flex;flex-direction:column;gap:12px;margin-top:8px}
.rev-detail{border:1px solid #f0d6d6;border-radius:12px;overflow:hidden;background:#fff}
.rev-detail .rd-head{display:flex;align-items:center;justify-content:space-between;padding:9px 14px;background:#fff5f5;border-bottom:1px solid #f6e0e0}
.rev-detail .rd-no{font-weight:700;color:#46506b;font-size:14px}
.rev-detail .rd-tag{font-size:12px;font-weight:700;padding:2px 10px;border-radius:999px}
.rev-detail .rd-tag.no{background:#ffe3e3;color:#c0392b}
.rev-detail .rd-stem{padding:11px 14px;font-weight:600;color:#2b3346;line-height:1.5;font-size:15px}
.rev-detail .rd-note{margin:0 14px 8px;font-size:12px;color:#b06a00;background:#fff8e6;padding:6px 10px;border-radius:8px}
.rev-detail .rd-opts{display:flex;flex-direction:column;gap:6px;padding:0 14px}
.rev-detail .rd-opt{padding:8px 12px;border-radius:8px;background:#f7f9fc;border:1px solid #e6ebf3;font-size:14px;color:#46506b;line-height:1.4}
.rev-detail .rd-opt.correct{background:#eafaf0;border-color:#bfe6cd;color:#1a7a3c;font-weight:700}
.rev-detail .rd-opt.wrong{background:#fff0f0;border-color:#f3c9c9;color:#c0392b;font-weight:700}
.rev-detail .rd-ans{padding:10px 14px;font-size:14px;color:#46506b;border-top:1px solid #f0e6e6;margin-top:8px}
.rev-detail .rd-ans .wa{color:#c0392b}
.rev-detail .rd-ans .ca{color:#1a7a3c}
.rev-detail .rd-analysis{padding:10px 14px;font-size:13px;line-height:1.65;color:#7a4b4b;background:#fff7f7;border-top:1px dashed #f0d6d6}
.rev-detail .rd-analysis.muted{color:#9aa3b5;background:#f7f9fc}

/* 课题成果标注 / 材料题文字作答 */
.project-banner{background:linear-gradient(135deg,#eef4ff,#f6f0ff);border:1px solid #d6e2ff;border-left:4px solid var(--accent);font-size:14px;line-height:1.6}
.project-banner b{color:var(--accent)}
.material-box{background:#f8fafc;border:1px solid #e6ebf3;border-radius:12px;padding:10px 12px;margin:10px 0;font-size:14px;line-height:1.7}
.material-box .mt{display:inline-block;font-weight:700;color:var(--accent);margin-right:6px}
.mat-input{width:100%;min-height:84px;resize:vertical;padding:10px 12px;border:1px solid #d4dbe8;border-radius:10px;font-size:14px;line-height:1.6;font-family:inherit;box-sizing:border-box}
.mat-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,102,241,.15)}
.kw-line{margin-top:8px;font-size:13px;line-height:1.8}
.kw{display:inline-block;padding:1px 8px;border-radius:999px;margin:2px 4px 2px 0;font-size:12px;border:1px solid transparent}
.kw.hit{background:#e7f7ee;color:#15803d;border-color:#b6e6c8}
.kw.miss{background:#fdeaea;color:#b91c1c;border-color:#f3c2c2}
.score-inline{font-weight:800;color:var(--accent)}

/* 精准评价：分题型表现 / 掌握率进度 / 薄弱知识点 */
.tb-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:4px}
.tb-cell{background:#f7f9fc;border-radius:12px;padding:10px 12px}
.tb-top{display:flex;justify-content:space-between;align-items:baseline;font-size:13px;color:var(--muted);margin-bottom:6px}
.tb-top b{font-size:15px}
.m-bar{display:inline-block;flex:1;height:8px;border-radius:999px;background:#e6ebf3;overflow:hidden;vertical-align:middle;min-width:60px}
.m-fill{display:block;height:100%;border-radius:999px;background:var(--accent)}
.m-rate{display:inline-block;margin-left:8px;font-size:12px;font-weight:700;color:var(--muted);vertical-align:middle}
.sug-kp{margin:8px 0 4px;padding-left:18px;line-height:1.9}
.sug-kp li{margin:4px 0}
.wk-row{display:flex;align-items:center;gap:12px;padding:8px 0;border-bottom:1px dashed #eef1f6}
.wk-row:last-child{border-bottom:none}
.wk-head{flex:1;min-width:0}
.wk-name{font-weight:700;color:#33405e;font-size:14px}
.wk-meta{display:block;font-size:12px;color:var(--muted);margin-top:2px}

/* 试题导入预览（docx） */
.q-prev{margin:10px 0;font-size:13px;line-height:1.7}
.q-prev .prev-list{margin:6px 0 0;padding-left:18px}
.q-prev .prev-list li{margin:2px 0}

/* ===== 测验列表（学生端模拟测验） ===== */
.exam-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin-top:6px}
.exam-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:8px;box-shadow:var(--shadow-sm);transition:.18s}
.exam-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#cfeef0}
.exam-name{font-weight:800;font-size:16px;color:var(--ink)}
.exam-sum{font-size:13px;color:var(--muted);line-height:1.6;flex:1}
.exam-card .btn{width:100%}

/* ===== 老师后台子页头 ===== */
.admin-sub{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.admin-sub h3{margin:0;flex:1;min-width:max-content}

/* ===== 试题管理 ===== */
.qm-tool{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.qm-tool select,.qm-tool input{padding:7px 9px;border:1px solid #d4dbe8;border-radius:9px;font-size:13px;font-family:inherit}
.qm-tool input{flex:1;min-width:140px}
.qm-list{display:flex;flex-direction:column;gap:14px}
.qm-group{border:1px solid var(--line);border-radius:12px;overflow:hidden}
.qm-ghead{background:#f3fbfb;padding:8px 12px;font-weight:700;color:#0e5e6e;font-size:14px;border-bottom:1px solid var(--line)}
.qm-count{font-weight:500;color:var(--muted);font-size:12px;margin-left:6px}
.qm-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-bottom:1px solid #f1f5f7;font-size:13px}
.qm-item:last-child{border-bottom:none}
.qm-badge{flex:0 0 auto;font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;color:#fff}
.qm-badge.c{background:var(--choice)}
.qm-badge.m{background:var(--material)}
.qm-badge.s{background:#0369a1}
.qm-stem{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#3a4a57}
.qm-tip{flex:0 0 auto;color:var(--muted);font-size:12px;max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.qm-item .btn.xs{padding:4px 9px;font-size:12px}
.qm-selwrap{flex:0 0 auto;display:flex;align-items:center}
.qm-selwrap input{width:16px;height:16px;cursor:pointer;accent-color:var(--brand)}
.qm-batch{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 12px;padding:9px 12px;background:#eef3ff;border:1px solid #d5e0fb;border-radius:11px}
.qm-selall{font-size:13px;color:#324a73;display:flex;align-items:center;gap:5px;cursor:pointer}
.qm-selall input{width:15px;height:15px;cursor:pointer;accent-color:var(--brand)}
.qm-batch .hint{margin-left:auto;color:var(--brand);font-weight:600}

/* 手动添加花名册弹窗 */
.ro-row{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.ro-idx{flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:#eef3f8;color:#46506b;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}
.ro-row input{flex:1;padding:8px 10px;border:1px solid #d4dbe8;border-radius:9px;font-size:14px;font-family:inherit;min-width:0}
.ro-row input.roName{max-width:140px}
.ro-row input.roSid{max-width:120px}
.ro-row input.roCls{max-width:110px}

/* ===== 考试管理 ===== */
.em-list{display:flex;flex-direction:column;gap:12px}
.em-card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;box-shadow:var(--shadow-sm)}
.em-card.em-del-card{opacity:.7;background:#fff7f8;border-color:#f6d3da}
.em-name{font-weight:800;font-size:15px}
.em-tag{font-size:11px;background:#fee2e6;color:#c2193b;padding:1px 8px;border-radius:999px;margin-left:6px;font-weight:700}
.em-sum{font-size:13px;color:var(--muted);line-height:1.7;margin:6px 0 10px}
.em-kpbox{display:flex;flex-wrap:wrap;gap:6px 14px;max-height:200px;overflow:auto;padding:6px 2px;border:1px dashed #d4dbe8;border-radius:10px}
.em-kp{font-size:13px;color:#3a4a57;display:flex;align-items:center;gap:5px;cursor:pointer}
.em-clsbox{display:flex;flex-wrap:wrap;gap:6px 12px;max-height:160px;overflow:auto;padding:6px 2px;border:1px dashed #d4dbe8;border-radius:10px}
.em-cls{font-size:13px;color:#3a4a57;display:flex;align-items:center;gap:5px;cursor:pointer;background:#f4f7fc;border:1px solid #e1e8f3;border-radius:8px;padding:4px 9px}
.qe-hint-row{margin-top:6px;display:flex;gap:8px}

/* ===== 单题编辑弹窗 ===== */
.qe-field{margin:9px 0;display:flex;flex-direction:column;gap:4px}
.qe-field>label{font-size:13px;font-weight:600;color:#41566a}
.qe-field input,.qe-field textarea,.qe-field select{padding:8px 10px;border:1px solid #d4dbe8;border-radius:9px;font-size:14px;font-family:inherit;width:100%;box-sizing:border-box}
.qe-field textarea{resize:vertical;line-height:1.6}
.qe-opts{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:6px 0}
.qe-opt{display:flex;align-items:center;gap:8px}
.qe-let{flex:0 0 auto;width:24px;height:24px;border-radius:50%;background:#eef3f8;color:#46506b;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:13px}
.qe-opt input{flex:1}
.qe-grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:6px}
.qe-sec{font-weight:700;color:#0e5e6e;margin:12px 0 6px;font-size:14px}
.qe-row{display:flex;gap:8px;align-items:flex-start;margin-bottom:8px}
.qe-row textarea{flex:1}
.qe-title{flex:0 0 120px}
.qe-sub{flex-wrap:wrap;background:#f8fafc;border:1px solid #e6ebf3;border-radius:10px;padding:8px}
.qe-subno{flex:0 0 100%;font-weight:700;color:var(--material);font-size:13px}
.qe-kw{display:flex;gap:6px;flex:0 0 100%}
.qe-kw input{flex:1}
.qe-score{flex:0 0 70px!important}
.qe-rm{flex:0 0 auto;align-self:center}
/* 试题编辑器：图片上传 */
.qe-img{margin:4px 0}
.qe-img .qe-file{font-size:13px;width:100%}
.qe-img .qe-prev{margin-top:6px}
.qe-img .qe-prev img{max-width:200px;max-height:150px;border:1px solid #e2e8f0;border-radius:8px;display:block}
.qe-img .qe-prev .qe-imgrm{margin-top:4px}
/* 试题列表缩略图 */
.qm-thumb{flex:0 0 auto;width:42px;height:42px;object-fit:cover;border:1px solid #e2e8f0;border-radius:7px}
.qm-item{align-items:center}


/* ===== 我的学习记录（历次练习 / 测验 / 课堂小测） ===== */
.rec-item{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin-bottom:10px;cursor:pointer;box-shadow:var(--shadow-sm);transition:transform .16s ease,box-shadow .16s ease}
.rec-item:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.rec-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rec-kind{font-size:13px;font-weight:700;color:var(--muted)}
.rec-name{font-weight:800;font-size:15px}
.rec-meta{margin-top:6px;font-size:13px;color:var(--muted)}
.rec-meta b{color:var(--ink)}
/* ===== 首页「课堂小测」提示横幅 ===== */
.quiz-banner{border:1px solid #ffd9a8;background:linear-gradient(135deg,#fff8ec,#fffdf7)}
.quiz-banner .sec{color:#b45309}
.new-tag{display:inline-block;margin-left:8px;padding:1px 8px;border-radius:999px;background:var(--err);color:#fff;font-size:11px;font-weight:800;vertical-align:middle}
/* ===== 课堂小测管理（老师后台弹窗） ===== */
.cq-row{display:flex;align-items:center;gap:10px;padding:8px 10px;border:1px solid var(--line);border-radius:10px;margin-bottom:8px;background:#fbfdff}
.cq-row>span:first-child{font-weight:700}
.cq-row .btn{margin-left:auto}
.cq-filterbar{margin-top:2px}
.cq-filter.on{background:#075985;color:#fff;border-color:#075985;font-weight:800}
.cq-filter.on:hover{background:#064a6b;color:#fff}

/* ===== 课堂小测导入：表格预览 / 逐题得分 ===== */
.mini-tb{border-collapse:collapse;font-size:12px;min-width:100%}
.mini-tb th,.mini-tb td{border:1px solid var(--line);padding:4px 8px;text-align:left;white-space:nowrap}
.mini-tb th{background:#f4f7fd;font-weight:700}
.mini-tb td{background:#fff}
.q-grid{display:flex;flex-wrap:wrap;gap:6px}
.q-cell{padding:3px 9px;border-radius:8px;font-size:13px;border:1px solid var(--line);background:#f7f9fc}
.q-cell.ok{background:#eafaf0;border-color:#b7e6c8;color:#16794a}
.q-cell.bad{background:#fdecec;border-color:#f6c2c2;color:#a32727}
.q-cell.half{background:#fff7e6;border-color:#f3d79a;color:#8a5a00}
.chip.up{background:#eafaf0;border-color:#b7e6c8;color:#16794a}
.chip.down{background:#fdecec;border-color:#f6c2c2;color:#a32727}

/* ===== 老师后台：学生数据 导出 / 删除 ===== */
.op-cell{white-space:nowrap}
.op-cell .btn{margin-right:4px}
.del-list{display:flex;flex-direction:column;gap:8px;margin:10px 0}
.del-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fbfdff}
.del-item>div:first-child{flex:1;min-width:0}
.del-item .btn{flex:0 0 auto}

/* ===== AI 仿真题：答案缺失提示 ===== */
.feedback.warn { color: #b45309; }

/* ===== 老师账号管理（v5.20）===== */
.acc-form{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0 2px}
.acc-form input{padding:7px 10px;border:1px solid #d4dbe8;border-radius:9px;font-size:13.5px;font-family:inherit;min-width:130px}
.acc-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,102,241,.15)}
.acc-tag{display:inline-block;padding:1px 8px;border-radius:999px;font-size:11.5px;font-weight:700;border:1px solid transparent;white-space:nowrap}
.acc-tag.cur{background:#e8f7ee;color:#15803d;border-color:#bfe6cc}
.acc-tag.seed{background:#eef3ff;color:#3b6fe0;border-color:#d7e0f3}

/* v5.33：分班级成绩总览 */
.cq-tabs{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 4px}
.cq-tab{background:#fff;color:var(--ink);border:1px solid #c3dbe1;font-weight:600}
.cq-tab:active{background:#cdeff7;box-shadow:inset 0 0 0 2px rgba(2,132,199,.45)}
.cq-tab.on{background:#075985;color:#fff;border-color:#075985;font-weight:800;box-shadow:0 4px 10px rgba(7,89,133,.4)}
.cq-tab.on::before{content:"✓ "}
.cq-tab.on:active{background:#043d5c}
.cq-summary{display:flex;flex-wrap:wrap;gap:10px;margin:10px 0}
.cq-stat{flex:1;min-width:120px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.cq-stat .v{font-size:22px;font-weight:800;color:var(--ink)}
.cq-stat .l{font-size:12.5px;color:#3d5763;margin-top:3px;font-weight:600}
.cq-dist{display:flex;height:22px;border-radius:6px;overflow:hidden;margin-top:6px;border:1px solid var(--line)}
.cq-dist > span{display:flex;align-items:center;justify-content:center;font-size:11px;color:#fff;white-space:nowrap}
.cq-legend{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px;font-size:11.5px;color:var(--muted)}
.cq-table{width:100%;border-collapse:collapse;font-size:13px;margin-top:8px}
.cq-table th,.cq-table td{border:1px solid var(--line);padding:5px 8px;text-align:center}
.cq-table th{background:var(--bg2,#eef6f7);position:sticky;top:0}
.cq-table td.name{text-align:left}
.cq-absent{color:var(--muted)}
.cq-wkp{font-size:11.5px;max-width:200px}
.cq-sug{line-height:1.7}

/* v5.41：后台考试名称切换按钮（选中态深蓝） */
.ad-exam-tab.on{background:#075985;color:#fff;border-color:#075985;font-weight:800}
.ad-exam-tab.on::before{content:"✓ "}