/* ============================================================
   考试系统 · 设计系统
   主题色定义见 theme.css（云白 / 曜夜 / 青瓷）
   本文件只负责组件样式与布局
   ============================================================ */

:root {
  /* 圆角（与主题无关） */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 24px;

  --ease: cubic-bezier(.4, 0, .2, 1);
  --header-h: 60px;
}

/* 主题切换时平滑过渡（仅颜色类属性，避免布局抖动） */
body, .card, .btn, .input, .select, .textarea, .opt, .q-cell, .modal, .topbar {
  transition: background-color .22s var(--ease), border-color .22s var(--ease),
    color .22s var(--ease), box-shadow .22s var(--ease);
}
/* 主题切换瞬间禁用过渡，避免整体"泛白"闪一下 */
html.theme-switching *, html.theme-switching *::before, html.theme-switching *::after {
  transition: none !important;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans SC', sans-serif;
  background: var(--bg-0);
  color: var(--text-1);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 背景氛围光（随主题变化） */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(900px 500px at 12% -8%, var(--atmo-1), transparent 60%),
    radial-gradient(760px 460px at 92% 4%, var(--atmo-2), transparent 62%),
    radial-gradient(600px 400px at 50% 108%, var(--atmo-3), transparent 60%);
  pointer-events: none;
  z-index: 0;
  transition: background .28s var(--ease);
}

#app { position: relative; z-index: 1; min-height: 100vh; }

button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
a { color: inherit; text-decoration: none; }

/* ---------------- 通用组件 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .2px;
  transition: all .2s var(--ease);
  border: 1px solid transparent;
  white-space: nowrap;
  user-select: none;
}
.btn:disabled { opacity: .45; cursor: not-allowed; }

.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 4px 16px var(--brand-glow); }
.btn-primary:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 8px 26px rgba(79, 124, 255, .42); }
.btn-primary:active:not(:disabled) { transform: translateY(0); }

.btn-ghost { background: var(--bg-2); color: var(--text-1); border-color: var(--line-strong); }
.btn-ghost:hover:not(:disabled) { background: var(--bg-hover); border-color: var(--brand-line); }

.btn-quiet { background: transparent; color: var(--text-2); }
.btn-quiet:hover:not(:disabled) { background: var(--bg-2); color: var(--text-1); }

.btn-danger { background: var(--danger-soft); color: var(--danger); border-color: rgba(255, 92, 114, .3); }
.btn-danger:hover:not(:disabled) { background: rgba(255, 92, 114, .22); }

.btn-ok { background: var(--ok-soft); color: var(--ok); border-color: rgba(36, 201, 139, .3); }
.btn-ok:hover:not(:disabled) { background: rgba(36, 201, 139, .22); }

.btn-lg { padding: 14px 30px; font-size: 15.5px; border-radius: var(--r-lg); }
.btn-sm { padding: 7px 13px; font-size: 13px; border-radius: var(--r-sm); }
.btn-block { width: 100%; }

.input, .select, .textarea {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-1);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  color: var(--text-1);
  transition: all .18s var(--ease);
  outline: none;
  font-size: 14px;
}
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-soft);
  background: var(--bg-2);
}
.input::placeholder, .textarea::placeholder { color: var(--text-3); }
.textarea { resize: vertical; min-height: 90px; line-height: 1.65; }
.select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7793' d='M6 8.5 2 4h8z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 13px center; padding-right: 34px; }

.field { display: flex; flex-direction: column; gap: 7px; }
.label { font-size: 13px; color: var(--text-2); font-weight: 500; }

.card {
  background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-1) 100%);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-2);
}

/* 徽标 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .3px;
  white-space: nowrap;
}
.tag-ok { background: var(--ok-soft); color: var(--ok); }
.tag-warn { background: var(--warn-soft); color: var(--warn); }
.tag-danger { background: var(--danger-soft); color: var(--danger); }
.tag-info { background: var(--brand-soft); color: var(--brand); }
.tag-muted { background: var(--bg-3); color: var(--text-3); }

/* 弹层 */
.modal-mask {
  position: fixed; inset: 0; z-index: 200;
  background: var(--mask);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  animation: fade .18s var(--ease);
}
.modal {
  background: var(--bg-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-3);
  width: 100%; max-width: 460px;
  max-height: 88vh; overflow: auto;
  animation: pop .22s var(--ease);
}
.modal-head {
  padding: 22px 24px 0;
  display: flex; align-items: flex-start; gap: 12px;
}
.modal-head h3 { margin: 0; font-size: 17px; font-weight: 700; letter-spacing: .2px; }
.modal-head .icon-btn { margin-left: auto; flex-shrink: 0; }
.modal-title { font-size: 18px; font-weight: 700; letter-spacing: .3px; }
.modal-desc { color: var(--text-2); font-size: 13.5px; margin-top: 7px; line-height: 1.65; }
.modal-body { padding: 20px 24px; display: flex; flex-direction: column; gap: 16px; }
.modal-foot { padding: 0 24px 22px; display: flex; gap: 10px; justify-content: flex-end; }

@keyframes fade { from { opacity: 0 } to { opacity: 1 } }
@keyframes pop { from { opacity: 0; transform: translateY(14px) scale(.97) } to { opacity: 1; transform: none } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px) } to { opacity: 1; transform: none } }

/* 提示条 */
#toast-host {
  position: fixed; top: 18px; left: 50%; transform: translateX(-50%);
  z-index: 999; display: flex; flex-direction: column; gap: 10px;
  align-items: center; pointer-events: none; width: calc(100% - 32px); max-width: 420px;
}
.toast {
  padding: 11px 18px; border-radius: var(--r-md);
  background: var(--bg-3); border: 1px solid var(--line-strong);
  box-shadow: var(--sh-3); font-size: 14px; font-weight: 500;
  animation: pop .2s var(--ease); max-width: 100%;
}
.toast.err { background: linear-gradient(135deg, rgba(255,92,114,.2), rgba(255,92,114,.1)); border-color: rgba(255,92,114,.4); color: var(--danger-text); }
.toast.ok { background: linear-gradient(135deg, rgba(36,201,139,.2), rgba(36,201,139,.1)); border-color: rgba(36,201,139,.4); color: var(--ok-text); }

.spin {
  width: 15px; height: 15px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.25); border-top-color: #fff;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg) } }

/* 滚动条 */
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-hover); border-radius: 6px; border: 2px solid var(--bg-0); }
::-webkit-scrollbar-thumb:hover { background: #2c3a5c; }

/* ---------------- 登录页 ---------------- */
.auth-wrap {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
}
.auth-visual {
  padding: 6vh 5vw;
  position: relative;
}
.auth-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--grad-soft); border: 1px solid var(--brand-line);
  color: var(--brand-text); font-size: 12.5px; font-weight: 600;
  letter-spacing: .5px; margin-bottom: 26px;
}
.auth-title {
  font-size: clamp(30px, 4.2vw, 50px);
  font-weight: 800; line-height: 1.2; letter-spacing: -1px;
  margin-bottom: 18px;
}
.auth-title em {
  font-style: normal;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.auth-desc { color: var(--text-2); font-size: 15.5px; max-width: 440px; line-height: 1.8; }
.auth-feats { margin-top: 38px; display: flex; flex-direction: column; gap: 15px; }
.auth-feat { display: flex; gap: 13px; align-items: flex-start; }
.auth-feat-ico {
  width: 34px; height: 34px; flex: 0 0 34px; border-radius: 10px;
  background: var(--grad-soft); border: 1px solid var(--brand-line);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
}
.auth-feat b { display: block; font-size: 14.5px; margin-bottom: 2px; }
.auth-feat span { font-size: 13px; color: var(--text-3); line-height: 1.55; }

.auth-panel {
  display: flex; align-items: center; justify-content: center;
  padding: 6vh 5vw;
  background: linear-gradient(180deg, var(--auth-panel-1), var(--auth-panel-2));
  border-left: 1px solid var(--line);
  min-height: 100vh;
}
.auth-card { width: 100%; max-width: 396px; }
.auth-card h2 { font-size: 25px; font-weight: 700; letter-spacing: -.4px; margin-bottom: 7px; }
.auth-card .sub { color: var(--text-3); font-size: 14px; margin-bottom: 28px; }
.auth-form { display: flex; flex-direction: column; gap: 16px; }
.auth-err {
  background: var(--danger-soft); border: 1px solid var(--danger-line);
  color: var(--danger-text); padding: 11px 14px; border-radius: var(--r-md);
  font-size: 13.5px; display: flex; gap: 8px; align-items: flex-start;
}
.auth-foot { margin-top: 22px; text-align: center; color: var(--text-3); font-size: 12.5px; }

@media (max-width: 900px) {
  .auth-wrap { grid-template-columns: 1fr; }
  .auth-visual { padding: 40px 24px 8px; }
  .auth-feats { display: none; }
  .auth-panel { padding: 28px 24px 48px; border-left: none; min-height: auto; border-top: 1px solid var(--line); }
  .auth-title { font-size: 30px; }
}

/* ---------------- 顶栏 ---------------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-h);
  display: flex; align-items: center; gap: 14px;
  padding: 0 22px;
  background: var(--topbar-bg);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--line);
}
.topbar-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.2px; }
.topbar-logo .mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: var(--grad); display: flex; align-items: center; justify-content: center;
  font-size: 15px; box-shadow: 0 3px 12px rgba(79,124,255,.35);
}
.topbar-spacer { flex: 1; }
.topbar-user { display: flex; align-items: center; gap: 10px; }
.topbar-name { font-size: 13.5px; font-weight: 600; }
.topbar-sub { font-size: 11.5px; color: var(--text-3); }

.page { max-width: 1180px; margin: 0 auto; padding: 30px 22px 60px; }
.page-head { margin-bottom: 24px; }
.page-title { font-size: 25px; font-weight: 700; letter-spacing: -.5px; }
.page-desc { color: var(--text-3); font-size: 14px; margin-top: 5px; }

/* tab 栏吸顶：长列表滚动时始终能看到当前所在 tab */
.tabs {
  display: flex; gap: 4px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px; overflow-x: auto;
  position: sticky; top: 0; z-index: 40;
  background: var(--topbar-bg);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  padding-top: 2px;
}
/* 筛选/翻页栏同样吸顶，紧贴 tab 栏下方 */
.filter-bar {
  position: sticky;
  top: calc(2px + var(--tab-h, 45px));
  z-index: 30;
  background: var(--topbar-bg);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  padding: 10px 0;
  border-radius: 0 0 var(--r-md) var(--r-md);
}
.tab {
  padding: 11px 17px; font-size: 14px; font-weight: 600; color: var(--text-3);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: all .18s var(--ease); white-space: nowrap;
}
.tab:hover { color: var(--text-2); }
.tab.on { color: var(--text-1); border-bottom-color: var(--brand); }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(175px, 1fr)); }

@media (max-width: 640px) {
  .page { padding: 20px 14px 44px; }
  .topbar { padding: 0 14px; gap: 9px; }
  .page-title { font-size: 21px; }
  /* 顶栏不换行，标题过长时省略，避免"考核管理后台"被拆成两行 */
  .topbar-logo { min-width: 0; flex-shrink: 1; }
  .topbar-logo > span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .topbar-name { white-space: nowrap; }
}

/* ---------------- 统计卡 ---------------- */
.stat { padding: 17px 19px; display: flex; flex-direction: column; gap: 5px; }
.stat-label { font-size: 12.5px; color: var(--text-3); font-weight: 500; }
.stat-value { font-size: 27px; font-weight: 800; letter-spacing: -.8px; line-height: 1.15; }
.stat-hint { font-size: 11.5px; color: var(--text-3); }
.stat.accent .stat-value { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat.ok .stat-value { color: var(--ok); }
.stat.warn .stat-value { color: var(--warn); }
.stat.danger .stat-value { color: var(--danger); }

/* ---------------- 考试大厅 ---------------- */
.exam-card { padding: 22px; display: flex; flex-direction: column; gap: 15px; position: relative; overflow: hidden; }
.exam-card::after {
  content: ''; position: absolute; top: -60px; right: -60px;
  width: 170px; height: 170px; border-radius: 50%;
  background: var(--grad-soft); filter: blur(28px); pointer-events: none;
}
.exam-card.accent-green::after { background: radial-gradient(circle, rgba(36,201,139,.16), transparent 70%); }
.exam-top { display: flex; align-items: flex-start; gap: 12px; position: relative; }
.exam-icon {
  width: 44px; height: 44px; flex: 0 0 44px; border-radius: 13px;
  background: var(--grad-soft); border: 1px solid var(--brand-line);
  display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.exam-card.accent-green .exam-icon { background: var(--ok-soft); border-color: rgba(36,201,139,.3); }
.exam-name { font-size: 17.5px; font-weight: 700; letter-spacing: -.3px; }
.exam-meta { font-size: 12.5px; color: var(--text-3); margin-top: 2px; }
.exam-stats { display: flex; gap: 8px; flex-wrap: wrap; position: relative; }
.exam-stat {
  background: var(--bg-1); border: 1px solid var(--line);
  border-radius: var(--r-sm); padding: 8px 12px; min-width: 72px;
}
.exam-stat b { display: block; font-size: 16px; font-weight: 700; letter-spacing: -.3px; }
.exam-stat span { font-size: 11px; color: var(--text-3); }
.exam-foot { display: flex; align-items: center; gap: 11px; margin-top: auto; position: relative; flex-wrap: wrap; }
.exam-best { font-size: 12.5px; color: var(--text-2); margin-right: auto; }
.exam-best b { color: var(--text-1); font-size: 15px; }

/* ---------------- 答题页 ---------------- */
.exam-page { display: flex; flex-direction: column; min-height: 100vh; }
.exam-bar {
  position: sticky; top: 0; z-index: 60;
  background: var(--float-bg);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--line);
}
.exam-bar-inner {
  max-width: 1180px; margin: 0 auto; padding: 12px 22px;
  display: flex; align-items: center; gap: 14px;
}
.exam-bar-title { font-size: 15px; font-weight: 700; }
.exam-bar-meta { font-size: 12px; color: var(--text-3); margin-top: 1px; }
.timer {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 15px; border-radius: var(--r-md);
  background: var(--brand-soft); border: 1px solid var(--brand-line);
  font-variant-numeric: tabular-nums;
}
.timer b { font-size: 19px; font-weight: 800; letter-spacing: .5px; }
.timer.warn { background: var(--warn-soft); border-color: rgba(255,176,32,.4); color: var(--warn); }
.timer.danger { background: var(--danger-soft); border-color: rgba(255,92,114,.45); color: var(--danger); animation: pulse 1.1s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .55 } }

.exam-progress { height: 3px; background: var(--bg-3); border-radius: 3px; overflow: hidden; }
.exam-progress i { display: block; height: 100%; background: var(--grad); transition: width .3s var(--ease); }

.exam-body {
  flex: 1; max-width: 1180px; width: 100%; margin: 0 auto;
  padding: 24px 22px 120px;
  display: grid; grid-template-columns: 1fr 268px; gap: 22px; align-items: start;
}

.q-card { padding: 26px 28px; }
.q-head { display: flex; align-items: center; gap: 11px; margin-bottom: 16px; flex-wrap: wrap; }
.q-no {
  font-size: 13px; font-weight: 800; letter-spacing: .5px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.q-stem { font-size: 17.5px; line-height: 1.72; font-weight: 600; margin-bottom: 22px; letter-spacing: -.2px; }

.opts { display: flex; flex-direction: column; gap: 11px; }
.opt {
  display: flex; align-items: flex-start; gap: 13px;
  padding: 14px 17px;
  background: var(--bg-1);
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: all .18s var(--ease);
  position: relative;
  -webkit-user-select: none; user-select: none;
}
.opt:hover { background: var(--bg-2); border-color: var(--line-strong); }
.opt.on { background: var(--brand-soft); border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.opt-key {
  width: 27px; height: 27px; flex: 0 0 27px; border-radius: 8px;
  background: var(--bg-3); border: 1px solid var(--line-strong);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: var(--text-2);
  transition: all .18s var(--ease);
}
.opt.on .opt-key { background: var(--grad); border-color: transparent; color: #fff; }
.opt-text { font-size: 15px; line-height: 1.65; padding-top: 2px; }
.opt-mark {
  margin-left: auto; font-size: 12px; color: var(--text-3);
  white-space: nowrap; padding-top: 5px;
  /* 未选中时为空，不占位、不影响对齐 */
  display: none;
}
.opt.on .opt-mark { display: block; }

/* 判断题选项（仅兼容历史快照） */
.opt-judge .opt-text { font-size: 16px; font-weight: 600; }

.q-foot { display: flex; gap: 11px; margin-top: 24px; }
.q-foot .btn { flex: 1; }

/* 题号面板 */
.q-panel { position: sticky; top: calc(var(--header-h) + 16px); padding: 18px; }
.q-panel h4 { font-size: 13px; color: var(--text-3); font-weight: 600; margin-bottom: 12px; letter-spacing: .3px; }
.q-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: 7px; }
.q-cell {
  aspect-ratio: 1; border-radius: 9px;
  background: var(--bg-1); border: 1.5px solid var(--line);
  font-size: 13px; font-weight: 600; color: var(--text-3);
  display: flex; align-items: center; justify-content: center;
  transition: all .16s var(--ease); position: relative;
}
.q-cell:hover { border-color: var(--brand-line); color: var(--text-1); }
.q-cell.done { background: var(--brand-soft); border-color: var(--brand-line); color: var(--brand-text); }
.q-cell.cur { background: var(--grad); border-color: transparent; color: #fff; box-shadow: 0 3px 12px var(--brand-glow); }
.q-cell.right { background: var(--ok-soft); border-color: rgba(36,201,139,.4); color: var(--ok); }
.q-cell.wrong { background: var(--danger-soft); border-color: rgba(255,92,114,.4); color: var(--danger); }

.q-legend { margin-top: 14px; padding-top: 13px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 7px; font-size: 12px; color: var(--text-3); }
.q-legend div { display: flex; align-items: center; gap: 8px; }
.q-legend i { width: 11px; height: 11px; border-radius: 3.5px; display: block; }

.q-submit {
  margin-top: 15px; padding-top: 15px; border-top: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 9px;
}
.q-count { font-size: 12.5px; color: var(--text-2); text-align: center; }

/* 移动端底部操作栏 */
.q-bottom {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 70;
  background: var(--float-bg);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--line);
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  display: none;
}
.q-bottom-inner { display: flex; gap: 10px; align-items: center; }
.q-bottom .btn { flex: 1; }
.q-sheet-btn {
  width: 46px; height: 46px; flex: 0 0 46px; border-radius: var(--r-md);
  background: var(--bg-2); border: 1px solid var(--line-strong);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-size: 10px; color: var(--text-2); gap: 1px; position: relative;
}
.q-sheet-btn .dot {
  position: absolute; top: 5px; right: 5px;
  min-width: 16px; height: 16px; padding: 0 4px; border-radius: 8px;
  background: var(--brand); color: #fff;
  font-size: 10px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}

@media (max-width: 900px) {
  .exam-body { grid-template-columns: 1fr; padding: 16px 14px 96px; gap: 14px; }
  .q-panel { display: none; }
  .q-bottom { display: block; }
  .q-card { padding: 20px 18px; border-radius: var(--r-lg); }
  .q-stem { font-size: 16.5px; margin-bottom: 18px; }
  .opt { padding: 13px 15px; gap: 11px; }
  .opt-text { font-size: 14.5px; }
  .exam-bar-inner { padding: 9px 12px; gap: 9px; }
  /* 标题区独占一行，避免被挤成竖排 */
  .exam-bar-inner { flex-wrap: wrap; row-gap: 8px; }
  .exam-bar-inner .exam-bar-head {
    order: -1; flex: 1 1 100%; min-width: 0;
    display: flex; align-items: center; gap: 10px;
  }
  .exam-bar-title {
    font-size: 14px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  }
  .exam-bar-meta {
    font-size: 11px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  }
  .timer { padding: 6px 11px; gap: 6px; flex: 0 0 auto; }
  .timer b { font-size: 16px; }
  #switchTag { font-size: 11px; padding: 2px 7px; }
  /* 退出按钮移到首行左侧 */
  .exam-bar-inner > .btn-quiet { order: -2; }
}

@media (max-width: 420px) {
  .exam-bar-inner { padding: 8px 10px; gap: 7px; }
  .exam-bar-title { font-size: 13px; }
  .q-bottom-inner { gap: 7px; }
  .q-bottom .btn { padding: 11px 10px; font-size: 13.5px; }
  .q-sheet-btn { width: 42px; height: 42px; flex-basis: 42px; }
}

/* 题号抽屉 */
.sheet-mask { position: fixed; inset: 0; z-index: 180; background: var(--mask); backdrop-filter: blur(6px); animation: fade .18s var(--ease); }
.sheet {
  position: fixed; z-index: 181; left: 0; right: 0; bottom: 0;
  background: var(--bg-2); border-top: 1px solid var(--line-strong);
  border-radius: var(--r-xl) var(--r-xl) 0 0;
  padding: 20px 18px calc(20px + env(safe-area-inset-bottom));
  box-shadow: var(--sh-3); animation: slideUp .24s var(--ease);
  max-height: 74vh; overflow: auto;
}
.sheet-grab { width: 38px; height: 4px; border-radius: 2px; background: var(--bg-hover); margin: -6px auto 16px; }
.sheet h4 { font-size: 15px; font-weight: 700; margin-bottom: 14px; }
.sheet .q-grid { grid-template-columns: repeat(auto-fill, minmax(44px, 1fr)); gap: 9px; }
.sheet-foot { margin-top: 18px; display: flex; gap: 10px; }

/* ---------------- 成绩页 ---------------- */
.result-hero {
  padding: 40px 30px; text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  position: relative; overflow: hidden;
}
.result-hero::before {
  content: ''; position: absolute; top: -80px; left: 50%; transform: translateX(-50%);
  width: 340px; height: 340px; border-radius: 50%;
  background: radial-gradient(circle, var(--brand-soft), transparent 68%);
  pointer-events: none;
}
.result-hero.pass::before { background: radial-gradient(circle, var(--ok-soft), transparent 68%); }
.result-hero.fail::before { background: radial-gradient(circle, var(--danger-soft), transparent 68%); }
.result-label { font-size: 13px; color: var(--text-3); letter-spacing: 2px; font-weight: 600; }
.result-score {
  font-size: 68px; font-weight: 800; line-height: 1; letter-spacing: -3px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.result-hero.pass .result-score { background: linear-gradient(135deg,#24c98b,#4f7cff); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.result-hero.fail .result-score { background: linear-gradient(135deg,#ff5c72,#ff8a5c); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.result-verdict { font-size: 18px; font-weight: 700; letter-spacing: .5px; margin-top: 4px; }
.result-meta { display: flex; gap: 26px; justify-content: center; margin-top: 22px; flex-wrap: wrap; position: relative; }
.result-meta div { text-align: center; }
.result-meta b { display: block; font-size: 19px; font-weight: 700; letter-spacing: -.4px; }
.result-meta span { font-size: 11.5px; color: var(--text-3); }

.result-list { padding: 8px 0; }
.result-row {
  display: flex; gap: 13px; padding: 15px 18px;
  border-bottom: 1px solid var(--line); align-items: flex-start;
  cursor: pointer; transition: background .16s var(--ease);
}
.result-row:last-child { border-bottom: none; }
.result-row:hover { background: var(--bg-1); }
.result-idx {
  width: 26px; height: 26px; flex: 0 0 26px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
  background: var(--bg-3); color: var(--text-3);
}
.result-row.ok .result-idx { background: var(--ok-soft); color: var(--ok); }
.result-row.no .result-idx { background: var(--danger-soft); color: var(--danger); }
.result-main { flex: 1; min-width: 0; }
.result-q { font-size: 14.5px; line-height: 1.6; margin-bottom: 8px; }
.result-answers { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; }
.result-answers span { color: var(--text-3); }
.result-answers b { color: var(--text-1); }
.result-row.ok .result-answers .mine b { color: var(--ok); }
.result-row.no .result-answers .mine b { color: var(--danger); }
.result-flag { font-size: 12px; font-weight: 700; flex-shrink: 0; padding-top: 4px; }
.result-row.ok .result-flag { color: var(--ok); }
.result-row.no .result-flag { color: var(--danger); }

.filter-bar { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; align-items: center; }
.chip {
  padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: var(--bg-2); border: 1px solid var(--line); color: var(--text-3);
  transition: all .16s var(--ease);
}
.chip:hover { color: var(--text-1); border-color: var(--line-strong); }
.chip.on { background: var(--brand-soft); border-color: var(--brand-line); color: var(--brand-text); }

/* ---------------- 表格 ---------------- */
.table-wrap { overflow-x: auto; border-radius: var(--r-lg); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 680px; }
table.tbl th {
  text-align: left; padding: 12px 15px; font-size: 12px; font-weight: 600;
  color: var(--text-3); background: var(--bg-3);
  white-space: nowrap; letter-spacing: .3px;
  position: sticky; top: 0;
}
table.tbl th:first-child { border-radius: var(--r-lg) 0 0 0; }
table.tbl th:last-child { border-radius: 0 var(--r-lg) 0 0; }
table.tbl td { padding: 13px 15px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.tbl tr:last-child td { border-bottom: none; }
table.tbl tbody tr { transition: background .14s var(--ease); }
table.tbl tbody tr:hover { background: var(--bg-1); }
.td-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.mono { font-variant-numeric: tabular-nums; font-feature-settings: 'tnum'; }

.empty { padding: 60px 20px; text-align: center; color: var(--text-3); }
.empty-ico { font-size: 40px; opacity: .3; margin-bottom: 14px; }
.empty p { font-size: 14px; }

/* ---------------- 激活态提示 ---------------- */
.notice {
  padding: 15px 18px; border-radius: var(--r-md);
  display: flex; gap: 12px; align-items: flex-start;
  font-size: 13.5px; line-height: 1.65;
}
.notice-info { background: var(--brand-soft); border: 1px solid var(--brand-line); color: var(--brand-text); }
.notice-warn { background: var(--warn-soft); border: 1px solid rgba(255,176,32,.3); color: var(--warn-text); }
.notice-danger { background: var(--danger-soft); border: 1px solid rgba(255,92,114,.3); color: #ffb8c2; }
.notice-ico { flex-shrink: 0; font-size: 16px; line-height: 1.4; }

/* 有效期倒计时条 */
.valid-bar {
  padding: 13px 18px; border-radius: var(--r-md);
  background: var(--grad-soft); border: 1px solid var(--brand-line);
  display: flex; align-items: center; gap: 13px; flex-wrap: wrap;
}
.valid-bar b { color: #fff; font-variant-numeric: tabular-nums; font-size: 15px; }
.valid-bar span { color: var(--brand-text); font-size: 13px; }
.valid-bar.danger { background: var(--danger-soft); border-color: rgba(255,92,114,.35); }
.valid-bar.danger b, .valid-bar.danger span { color: #ffb8c2; }

/* 切屏警告浮层 */
.switch-warn {
  position: fixed; inset: 0; z-index: 300;
  background: var(--mask-strong); backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center; padding: 24px;
  animation: fade .18s var(--ease);
}
.switch-box {
  max-width: 420px; text-align: center;
  padding: 34px 28px;
  animation: pop .22s var(--ease);
}
.switch-ico { font-size: 46px; margin-bottom: 14px; }
.switch-box h3 { font-size: 21px; font-weight: 800; margin-bottom: 10px; letter-spacing: -.4px; }
.switch-box p { color: var(--text-2); font-size: 14px; line-height: 1.7; margin-bottom: 22px; }

/* 骨架屏 */
.skel { background: linear-gradient(90deg, var(--bg-2) 25%, var(--bg-3) 50%, var(--bg-2) 75%); background-size: 200% 100%; animation: shine 1.4s infinite; border-radius: var(--r-sm); }
@keyframes shine { from { background-position: 200% 0 } to { background-position: -200% 0 } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}