/* ============================================================
   译词卡 LexiCard — 和风 · 暖纸 · 墨梅
   手机优先，可打包为 Android App（WebView / Capacitor）
   ============================================================ */

:root {
  --bg: #f7f1e3;               /* 暖纸 */
  --surface: #fbf6ea;
  --surface-soft: #f1e9d7;
  --ink: #4b3034;              /* 墨梅 */
  --ink-soft: #7d666a;
  --ink-faint: #a8969a;
  --line: #ddd0bd;
  --line-strong: #4b3034;
  --accent: #5c3a40;           /* 深梅 */
  --accent-ink: #f7f1e3;
  --accent-soft: #ede1d5;
  --persimmon: #a9573f;        /* 柿 */
  --persimmon-soft: #f0e0d6;
  --mustard: #96773d;          /* 芥子 */
  --danger: #a9573f;
  --danger-soft: #f0e0d6;
  --shadow: 0 1px 2px rgba(75, 48, 52, .05), 0 4px 16px rgba(75, 48, 52, .06);
  --shadow-lg: 0 2px 6px rgba(75, 48, 52, .07), 0 14px 40px rgba(75, 48, 52, .12);
  --radius: 10px;
  --radius-sm: 6px;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", "Palatino Linotype", Palatino, Georgia, serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", "Heiti SC", system-ui, -apple-system, sans-serif;
  --font-ui: var(--font-serif);
  --weight-body: 400;
  --nav-h: 64px;
}

[data-theme="dark"] {
  --bg: #221c1a;
  --surface: #2b2422;
  --surface-soft: #262020;
  --ink: #ead9cc;
  --ink-soft: #b39d95;
  --ink-faint: #82706c;
  --line: #40352f;
  --line-strong: #ead9cc;
  --accent: #c9a08a;
  --accent-ink: #221c1a;
  --accent-soft: #3a2f2b;
  --persimmon: #d08663;
  --persimmon-soft: #45322a;
  --mustard: #c6a25f;
  --danger: #d08663;
  --danger-soft: #45322a;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .22);
  --shadow-lg: 0 2px 6px rgba(0, 0, 0, .35), 0 14px 40px rgba(0, 0, 0, .4);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

[hidden] { display: none !important; }

/* 全局字号：所有内容区字号以 rem 表达，改这里即整体缩放。
   导航栏与徽标仍用固定 px（窄屏 7 个页签空间极紧，且栏高参与布局计算）。
   阅读正文另有 --read-size 独立控制，不受此处影响。 */
html {
  -webkit-text-size-adjust: 100%;
  font-size: calc(16px * var(--ui-scale, 1));
}

body {
  font-family: var(--font-ui);
  font-weight: var(--weight-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-tap-highlight-color: transparent;
  transition: background .3s, color .3s;
}

svg { display: block; }
.tab svg, .icon-btn svg, .btn svg, .fc-tts svg, .theme-toggle svg {
  width: 20px; height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: calc(16px + env(safe-area-inset-top)) 22px 10px;
  max-width: 920px;
  margin: 0 auto;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark { width: 44px; height: 44px; color: var(--ink); border-radius: 11px; }

.brand-text h1 {
  font-size: 1.1875rem;
  font-weight: 600;
  letter-spacing: 2px;
}
.brand-text h1 em { font-style: italic; font-weight: 500; letter-spacing: .5px; }
.brand-text p { font-size: 0.6875rem; color: var(--ink-faint); letter-spacing: 3px; }

.theme-toggle {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  border-radius: 50%;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}
.theme-toggle:hover { border-color: var(--ink); color: var(--ink); }

/* ---------- 导航（桌面：顶部；手机：底部标签栏） ---------- */
.tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;      /* 极端字号下折行兜底，不横向溢出 */
  gap: 6px;
  max-width: 920px;
  margin: 4px auto 10px;
  padding: 0 22px;
}

.tab {
  border: none;
  background: transparent;
  font: inherit;
  /* 随界面字号放大，但封顶 20px：7 个页签需约 6.4em 宽，
     再大就会超出 920px 的内容宽度而折行。手机端另有固定值，见下方媒体查询。 */
  font-size: min(0.875rem, 18px);
  letter-spacing: .07em;
  color: var(--ink-soft);
  padding: .5em 1em;
  border-radius: 999px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 7px;
  position: relative;
  transition: background .15s, color .15s;
}
.tab svg { width: 1.25em; height: 1.25em; }
.tab:hover { background: var(--surface-soft); }
.tab.active { background: var(--accent); color: var(--accent-ink); }

.badge {
  display: inline-block;
  min-width: 1.6em;
  padding: 0 .4em;
  font-size: min(0.6563rem, 15px);
  line-height: 1.6;
  text-align: center;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--ink-soft);
  font-family: Georgia, serif;
}
.tab.active .badge { background: rgba(255, 255, 255, .22); color: inherit; }
[data-theme="dark"] .tab.active .badge { background: rgba(0, 0, 0, .22); }
.badge-due:empty { display: none; }
.badge-due { background: var(--persimmon); color: #f7f1e3; }
.tab.active .badge-due { background: var(--persimmon); color: #f7f1e3; }

/* ---------- 侧边竖排标语（仅宽屏） ---------- */
.side-mark {
  position: fixed;
  left: 18px;
  bottom: 90px;
  writing-mode: vertical-rl;
  font-size: 0.6562rem;
  letter-spacing: 6px;
  color: var(--ink-faint);
  user-select: none;
  pointer-events: none;
}
@media (max-width: 1120px) { .side-mark { display: none; } }

/* ---------- 布局 ---------- */
main {
  max-width: 920px;
  margin: 0 auto;
  padding: 6px 22px 60px;
}

.view { display: none; }
.view.active { display: block; animation: fadein .25s ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; } }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 24px;
  margin-bottom: 20px;
}
.panel-soft { background: transparent; border-style: dashed; box-shadow: none; }
.panel-danger { border-color: var(--danger-soft); }

.panel-title {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.panel-title::before {
  content: "";
  width: 4px; height: 16px;
  background: var(--accent);
  border-radius: 1px;
}
.panel-subtitle { font-size: 0.8438rem; color: var(--ink-soft); font-weight: 600; letter-spacing: 2px; margin-bottom: 12px; }
.panel-hint { font-size: 0.7812rem; color: var(--ink-faint); margin-bottom: 14px; }
.panel-head-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ---------- 表单 ---------- */
textarea, input[type="text"], input[type="search"], input[type="password"], select {
  width: 100%;
  font: inherit;
  font-size: 0.9375rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  transition: border-color .15s, box-shadow .15s;
}
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%23a8969a' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 30px;
}
textarea:focus, input:focus, select:focus {
  border-color: var(--ink-soft);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
textarea { resize: vertical; line-height: 1.8; }

/* 手机端把高频使用的「新词速记」做成接近一屏的书写工作区。 */
@media (max-width: 720px) {
  #capture-input {
    min-height: clamp(320px, 40dvh, 520px);
  }
}

.capture-row { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.capture-row input { flex: 1; min-width: 200px; }

.field { display: flex; flex-direction: column; gap: 5px; font-size: 0.7812rem; color: var(--ink-soft); }
.field > span { font-weight: 600; letter-spacing: 1.5px; }
.field > small { color: var(--ink-faint); line-height: 1.5; }

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}
.modal .field { margin-bottom: 12px; }

/* ---------- 按钮 ---------- */
.btn {
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .1s, box-shadow .15s, background .15s, border-color .15s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: wait; }

.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover:not(:disabled) { filter: brightness(1.1); }

.btn-ghost { background: transparent; color: var(--ink-soft); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); }
.btn-ghost.on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }

.btn-danger { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #f7f1e3; }
.btn-lg { font-size: 0.9375rem; padding: 13px 30px; }
.btn-sm { font-size: 0.7812rem; padding: 6px 14px; }

.btn-group { display: flex; gap: 10px; align-items: center; }
.btn-group.right { justify-content: flex-end; margin-top: 8px; }
.btn-group.wrap { flex-wrap: wrap; }
.settings-actions {
  display: grid;
  /* auto-fit + 最小宽度：放大到装不下三列时自动折行，而不是把按钮压得比文字还窄 */
  grid-template-columns: repeat(auto-fit, minmax(min(7em, 100%), 1fr));
  gap: 10px;
}
.settings-actions .btn { width: 100%; min-width: 0; padding-inline: 10px; }

.collapsible-panel { position: relative; }
.collapsible-panel > .panel-title,
.collapsible-panel > .panel-subtitle { padding-right: 42px; }
.panel-collapse {
  position: absolute;
  top: 13px;
  right: 13px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
}
.panel-collapse:hover { border-color: var(--ink); color: var(--ink); }
.panel-collapse span { font: 17px/1 sans-serif; transition: transform .2s ease; }
.panel-collapse.collapsed span { transform: rotate(180deg); }
.collapsible-body[hidden] { display: none; }

.gen-status { font-size: 0.8125rem; color: var(--ink-soft); margin-top: 12px; }
.gen-status.err { color: var(--danger); }
.gen-status.ok { color: var(--accent); }
[data-theme="light"] .gen-status.ok { color: #5c7355; }

/* ---------- 词条卡片（列表） ---------- */
.card-list { display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; margin-top: 14px; }

.word-card {
  min-width: 0;          /* grid 子项默认 min-width:auto，会被内部 nowrap 元素撑破 */
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
  position: relative;
  transition: box-shadow .2s;
}
.word-card:hover { box-shadow: var(--shadow-lg); }
.word-card.preview { border-left: 3px solid var(--mustard); }

.wc-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; padding-right: 150px; }

.wc-term { font-size: 1.25rem; font-weight: 700; }
.wc-ipa { font-size: 0.8125rem; color: var(--persimmon); font-family: Georgia, serif; }
.wc-pos {
  font-size: 0.6875rem;
  font-style: italic;
  color: var(--ink-faint);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 0 5px;
  font-family: Georgia, serif;
}
.wc-trans { font-size: 0.9688rem; margin-top: 2px; letter-spacing: .5px; }

.wc-note {
  font-size: 0.7812rem;
  color: var(--ink-soft);
  margin-top: 8px;
  padding-left: 10px;
  border-left: 2px solid var(--line);
}

.wc-block { margin-top: 10px; }
.wc-block h4 {
  font-size: 0.6562rem;
  letter-spacing: 3px;
  color: var(--ink-faint);
  font-weight: 700;
  margin-bottom: 3px;
}
.wc-block ul { list-style: none; }
.wc-block li { font-size: 0.8125rem; padding: 2px 0; color: var(--ink-soft); }
.wc-block li b { color: var(--ink); font-weight: 600; }
.wc-example-zh { color: var(--ink-faint); }

.wc-tags { display: flex; gap: 6px; margin-top: 12px; flex-wrap: wrap; }
.wc-tag {
  font-size: 0.6875rem;
  letter-spacing: 1px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 1px 10px;
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.wc-tag:hover { border-color: var(--accent); color: var(--accent); }

.wc-actions {
  position: absolute;
  top: 14px; right: 44px;
  display: flex;
  gap: 0;
}
.wc-collapse {
  position: absolute;
  z-index: 2;
  top: 13px;
  right: 11px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  padding: 0;
}
.wc-collapse span { display: block; font: 16px/1 sans-serif; transition: transform .2s ease; }
.word-card.collapsed .wc-collapse span { transform: rotate(180deg); }
.word-card.collapsed .wc-details,
.word-card.collapsed .wc-actions { display: none; }
.word-card.collapsed { padding-top: 14px; padding-bottom: 14px; box-shadow: none; }
.word-card.collapsed .wc-head { padding-right: 38px; }
.word-card.collapsed .wc-term { font-size: 1.0625rem; }
.word-card.collapsed .wc-trans { font-size: 0.8438rem; color: var(--ink-soft); }
.icon-btn {
  border: none;
  background: transparent;
  padding: 7px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--ink-faint);
  transition: background .15s, color .15s;
}
.icon-btn svg { width: 17px; height: 17px; }
.icon-btn:hover { background: var(--surface-soft); color: var(--ink); }
.icon-btn.starred { color: var(--mustard); }
.icon-btn.starred svg { fill: var(--mustard); stroke: var(--mustard); }

.wc-due { font-size: 0.6875rem; color: var(--ink-faint); margin-top: 10px; letter-spacing: 1px; }

.recent-list { display: flex; flex-wrap: wrap; gap: 8px; }
.recent-chip {
  font-size: 0.7812rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 14px;
  color: var(--ink-soft);
}
.recent-chip b { color: var(--ink); font-weight: 600; }

.empty-hint { text-align: center; color: var(--ink-faint); padding: 60px 0; font-size: 0.875rem; letter-spacing: 1px; }

/* ---------- 录入模式切换 ---------- */
.mode-switch {
  display: flex;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 16px;
  background: var(--surface);
}
.mode-btn {
  flex: 1;
  border: none;
  background: transparent;
  font: inherit;
  font-size: 0.8438rem;
  letter-spacing: 2px;
  color: var(--ink-soft);
  padding: 10px 0;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.mode-btn + .mode-btn { border-left: 1px solid var(--line); }
.mode-btn.active { background: var(--accent); color: var(--accent-ink); }

/* ---------- 词库画像 ---------- */
.profile-box {
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 14px;
  font-size: 0.7812rem;
  color: var(--ink-soft);
  line-height: 1.8;
}
.profile-box .profile-title {
  font-size: 0.6875rem;
  letter-spacing: 3px;
  color: var(--ink-faint);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.profile-box .profile-refresh {
  border: none;
  background: transparent;
  font: inherit;
  font-size: 0.7188rem;
  letter-spacing: 1px;
  color: var(--persimmon);
  cursor: pointer;
  padding: 2px 4px;
}
.profile-box .profile-refresh:hover { text-decoration: underline; }
.profile-box .profile-meta { font-size: 0.6875rem; color: var(--ink-faint); margin-top: 4px; }
.profile-box ul { list-style: none; }
.profile-box li { padding: 1px 0; }
.profile-box li::before { content: "· "; color: var(--ink-faint); }

/* ---------- 提取候选列表 ---------- */
.candidate-list { display: grid; gap: 8px; margin-top: 14px; }
.candidate {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  background: var(--surface);
  cursor: pointer;
  transition: border-color .15s, opacity .15s;
}
.candidate:hover { border-color: var(--ink-soft); }
.candidate.off { opacity: .45; }
.candidate input[type="checkbox"] {
  width: 17px; height: 17px;
  margin-top: 4px;
  accent-color: var(--accent);
  flex-shrink: 0;
}
.candidate .cand-body { flex: 1; min-width: 0; }
.candidate .cand-term { font-size: 0.9688rem; font-weight: 700; }
.candidate .cand-type {
  font-size: 0.6562rem;
  letter-spacing: 1px;
  border: 1px solid var(--line);
  color: var(--ink-faint);
  border-radius: 3px;
  padding: 0 5px;
  margin-left: 8px;
  vertical-align: 2px;
}
.candidate .cand-gloss { font-size: 0.8125rem; color: var(--ink); margin-top: 1px; }
.candidate .cand-reason { font-size: 0.75rem; color: var(--ink-faint); margin-top: 3px; }

.candidate-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.check-all {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--ink-soft);
  cursor: pointer;
  letter-spacing: 1px;
}
.check-all input { width: 16px; height: 16px; accent-color: var(--accent); }

/* ---------- 快速翻译 ---------- */
.translate-bar { display: flex; gap: 10px; margin: 6px 0 12px; flex-wrap: wrap; }
.translate-bar select { flex: 1 1 10em; width: auto; min-width: 0; }
.tr-output-head { margin-top: 20px; }
.tr-output {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-top: 8px;
  font-size: 0.9375rem;
  line-height: 1.9;
  white-space: pre-wrap;
  word-break: break-word;
  user-select: text;
  -webkit-user-select: text;
  min-height: 80px;
}

/* ---------- 模型行 / 常用配置 ---------- */
.model-row { display: flex; gap: 8px; }
.model-row input { flex: 1; min-width: 0; }
.model-row .btn { flex-shrink: 0; padding: 9px 14px; font-size: 0.8125rem; }

.saved-configs { margin-top: 22px; border-top: 1px dashed var(--line); padding-top: 16px; }
.config-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 8px; }
.config-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 8px 5px 14px;
  font-size: 0.8125rem;
  color: var(--ink-soft);
  cursor: pointer;
  transition: border-color .15s, color .15s, background .15s;
}
.config-chip:hover { border-color: var(--ink); color: var(--ink); }
.config-chip.active { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.config-chip .chip-del {
  border: none;
  background: transparent;
  color: inherit;
  opacity: .55;
  cursor: pointer;
  font-size: 0.875rem;
  line-height: 1;
  padding: 3px 5px;
  border-radius: 50%;
}
.config-chip .chip-del:hover { opacity: 1; }
.config-empty { font-size: 0.7812rem; color: var(--ink-faint); }

/* ---------- 选词模式（阅读视图） ---------- */
.extract-reader {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 0.9688rem;
  line-height: 2.1;
  max-height: 340px;
  overflow-y: auto;
  user-select: text;
  -webkit-user-select: text;
  word-break: break-word;
  white-space: pre-wrap;
}
.tok {
  cursor: pointer;
  border-radius: 3px;
  padding: 1px 1px;
  transition: background .12s;
}
.tok:hover { background: var(--surface-soft); }
.tok.sel {
  background: var(--accent-soft);
  box-shadow: inset 0 -2px 0 var(--accent);
  color: var(--accent);
}
[data-theme="dark"] .tok.sel { color: var(--ink); }
.reader-hint { margin-top: 8px; margin-bottom: 0; }

/* ---------- 划选浮动按钮 ---------- */
.sel-fab {
  position: fixed;
  z-index: 300;
  border: none;
  background: var(--ink);
  color: var(--bg);
  font: inherit;
  font-size: 0.8125rem;
  letter-spacing: 1.5px;
  padding: 8px 18px;
  border-radius: 999px;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  animation: toast-in .15s ease;
}

/* ---------- 翻译释疑（问答） ---------- */
.qa-thread { display: flex; flex-direction: column; gap: 10px; margin-bottom: 14px; }
.qa-thread:empty { display: none; }
.qa-msg {
  max-width: 94%;
  padding: 10px 15px;
  border-radius: 12px;
  font-size: 0.9062rem;
  line-height: 1.85;
  white-space: pre-wrap;
  word-break: break-word;
}
.qa-q {
  align-self: flex-end;
  background: var(--accent);
  color: var(--accent-ink);
  border-bottom-right-radius: 4px;
}
.qa-a {
  align-self: flex-start;
  background: var(--bg);
  border: 1px solid var(--line);
  border-bottom-left-radius: 4px;
  user-select: text;
  -webkit-user-select: text;
}
.qa-a.pending { color: var(--ink-faint); }
.qa-tocard {
  align-self: flex-start;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.75rem;
  letter-spacing: 1.5px;
  padding: 4px 14px;
  border-radius: 999px;
  cursor: pointer;
  margin: -4px 0 4px;
  transition: border-color .15s, color .15s;
}
.qa-tocard:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.qa-tocard:disabled { opacity: .6; cursor: default; }

/* ---------- 车型介绍 ---------- */
#view-model .panel > input[type="text"] { margin-bottom: 10px; }

.search-toggle {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 2px 0 4px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
  color: var(--ink-soft);
  font-size: 0.8125rem;
  line-height: 1.5;
  cursor: pointer;
}
.search-toggle input { margin-top: 3px; accent-color: var(--accent); }
.search-toggle b { color: var(--ink); }
.search-hint { margin: 0 0 10px; }

.brief-search-badge {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.6875rem;
  letter-spacing: .5px;
}
.brief-search-badge.online { color: var(--accent); border: 1px solid var(--accent); }
.brief-search-badge.offline { color: var(--ink-faint); border: 1px solid var(--line); }

.brief-head { padding-bottom: 4px; }
.brief-name { font-size: 1.5rem; font-weight: 700; letter-spacing: .5px; line-height: 1.3; }
.brief-name-zh { font-size: 0.9375rem; color: var(--ink-soft); letter-spacing: 2px; margin-top: 2px; }
.brief-tagline {
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--accent);
  font-size: 0.8438rem;
  color: var(--ink-soft);
}
.brief-tagline .en { display: block; font-style: italic; color: var(--ink-faint); margin-top: 2px; }

.brief-sec { margin-top: 18px; border-top: 1px dashed var(--line); padding-top: 14px; }
.brief-sec h4 {
  font-size: 0.9062rem;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.brief-sec h4 .en {
  font-weight: 400;
  font-style: italic;
  font-size: 0.75rem;
  letter-spacing: 1px;
  color: var(--ink-faint);
  margin-left: 8px;
}
.brief-zh { font-size: 0.9375rem; line-height: 1.95; }
.brief-en {
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--ink-soft);
  margin-top: 8px;
  padding-left: 10px;
  border-left: 2px solid var(--line);
}
#model-brief { user-select: text; -webkit-user-select: text; }

.brief-sources { margin-top: 20px; border-top: 1px dashed var(--line); padding-top: 14px; }
.brief-sources h4 { font-size: 0.875rem; letter-spacing: 2px; margin-bottom: 8px; }
.brief-sources h4 .en { color: var(--ink-faint); font-size: 0.75rem; font-weight: 400; margin-left: 6px; }
.brief-sources ol { padding-left: 20px; }
.brief-sources li { margin: 7px 0; font-size: 0.7812rem; color: var(--ink-soft); }
.brief-sources a { color: var(--accent); overflow-wrap: anywhere; }
.brief-sources li span { display: block; color: var(--ink-faint); font-size: 0.6875rem; margin-top: 1px; }

.brief-terms { margin-top: 20px; border-top: 1px dashed var(--line); padding-top: 14px; }
.term-chip {
  font-size: 0.7812rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 14px;
  color: var(--ink-soft);
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.term-chip b { color: var(--ink); font-weight: 600; }
.term-chip:hover { border-color: var(--accent); color: var(--accent); }
.term-chip.added { border-color: var(--accent); color: var(--accent); opacity: .6; cursor: default; }

.hist-group { border-top: 1px solid var(--line); }
.hist-group:last-child { border-bottom: 1px solid var(--line); }
.hist-group summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 4px;
  font-size: 0.8438rem;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  list-style: none;
}
.hist-group summary::-webkit-details-marker { display: none; }
.hist-group summary::after { content: '▽'; color: var(--ink-faint); margin-left: auto; }
.hist-group[open] summary::after { content: '△'; }
.hist-group summary small { font-size: 0.6875rem; font-weight: 400; color: var(--ink-faint); }
.hist-rows { display: grid; gap: 7px; padding: 0 0 10px; }
.hist-item { display: grid; grid-template-columns: minmax(0, 1fr) 38px; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.hist-item.active { border-color: var(--accent); background: var(--accent-soft); }
.hist-chip {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  align-items: baseline;
  gap: 2px 9px;
  text-align: left;
  font-size: 0.7812rem;
  border: 0;
  border-radius: 0;
  padding: 8px 11px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: color .15s, background .15s;
}
.hist-name { color: var(--ink); font-weight: 700; }
.hist-name-en { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hist-chip small { grid-column: 1 / -1; font-size: 0.625rem; opacity: .68; white-space: nowrap; }
.hist-chip:hover { color: var(--ink); }
.hist-delete {
  border: 0;
  border-left: 1px solid var(--line);
  padding: 3px 8px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
}
.hist-delete:hover { background: var(--danger-soft); color: var(--danger); }

/* ---------- 卡片库工具栏 ---------- */
.library-toolbar { display: flex; flex-direction: column; gap: 10px; margin-bottom: 6px; }
.library-toolbar-row { display: flex; gap: 10px; flex-wrap: wrap; }
.library-toolbar-row select { flex: 1 1 9em; width: auto; min-width: 0; }
.library-toolbar-row .btn { flex: 0 1 auto; }

/* ---------- 复习 ---------- */
.review-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.stat-tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
}
.stat-tile .num { font-size: 1.625rem; font-weight: 700; font-family: Georgia, var(--font-serif); }
.stat-tile .lbl { font-size: 0.6875rem; color: var(--ink-faint); letter-spacing: 2px; }
.stat-tile.hot .num { color: var(--persimmon); }

.review-options { display: flex; gap: 14px; flex-wrap: wrap; margin: 14px 0 20px; }
.review-options .field { flex: 1; min-width: 140px; }

.review-progress { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.review-progress-bar {
  flex: 1; height: 4px;
  background: var(--surface-soft);
  border-radius: 999px;
  overflow: hidden;
}
#review-progress-fill {
  height: 100%; width: 0%;
  background: var(--accent);
  border-radius: 999px;
  transition: width .3s ease;
}
#review-progress-text { font-size: 0.75rem; color: var(--ink-faint); white-space: nowrap; font-family: Georgia, serif; }

.flashcard {
  perspective: 1400px;
  cursor: pointer;
  outline: none;
  max-width: 620px;
  margin: 0 auto;
}
.flashcard-inner {
  position: relative;
  width: 100%;
  min-height: 340px;
  transform-style: preserve-3d;
  transition: transform .5s cubic-bezier(.2, .7, .3, 1);
}
.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }

.flashcard-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 34px 34px;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
/* 内容少时垂直居中，溢出时可从顶部完整滚动 */
.fc-body { margin: auto 0; display: flex; flex-direction: column; }
/* 内侧细线，和风双框 */
.flashcard-face::before {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid var(--line);
  border-radius: 9px;
  pointer-events: none;
}
.flashcard-back { transform: rotateY(180deg); }

.fc-label {
  font-size: 0.6562rem;
  letter-spacing: 4px;
  color: var(--ink-faint);
  margin-bottom: 14px;
}
.fc-term {
  font-size: 1.875rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .5px;
}
.fc-meta { margin-top: 8px; font-size: 0.9062rem; color: var(--persimmon); font-family: Georgia, serif; }
.fc-meta .wc-pos { font-size: 0.75rem; vertical-align: 2px; margin-left: 8px; }
.fc-answer {
  font-size: 1.5625rem;
  font-weight: 700;
  line-height: 1.45;
}
.fc-detail { margin-top: 14px; font-size: 0.8125rem; color: var(--ink-soft); }
.fc-detail li { padding: 2px 0; list-style: none; }
.fc-tts {
  align-self: flex-start;
  margin-top: 16px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 999px;
  padding: 6px 16px;
  font: inherit;
  font-size: 0.7812rem;
  letter-spacing: 1px;
  cursor: pointer;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.fc-tts svg { width: 14px; height: 14px; }
.fc-tts:hover { border-color: var(--accent); color: var(--accent); }

.review-tip { text-align: center; color: var(--ink-faint); font-size: 0.75rem; margin-top: 16px; letter-spacing: 2px; }
kbd {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 6px;
  font-size: 0.6875rem;
  font-family: inherit;
}

.grade-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  max-width: 620px;
  margin: 18px auto 0;
}
.grade {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  padding: 12px 4px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  letter-spacing: 2px;
}
.grade small { font-size: 0.625rem; color: var(--ink-faint); font-weight: 400; letter-spacing: 1px; }
.grade-again:hover, .grade-again:active { border-color: var(--danger); color: var(--danger); }
.grade-hard:hover,  .grade-hard:active  { border-color: var(--persimmon); color: var(--persimmon); }
.grade-good:hover,  .grade-good:active  { border-color: var(--accent); color: var(--accent); }
.grade-easy:hover,  .grade-easy:active  { border-color: var(--mustard); color: var(--mustard); }

.review-done { text-align: center; padding: 48px 26px; }
.review-done h2 { font-size: 1.3125rem; letter-spacing: 3px; margin-bottom: 10px; }
.review-done p { color: var(--ink-soft); margin-bottom: 22px; font-size: 0.8438rem; }
.review-done .btn { margin: 0 auto; }

/* ---------- 弹窗 ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(50, 34, 30, .45);
  display: grid;
  place-items: center;
  padding: 18px;
  z-index: 100;
  backdrop-filter: blur(3px);
}
.modal {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 24px 26px calc(24px + env(safe-area-inset-bottom));
  width: 100%;
  max-width: 600px;
  max-height: 88vh;
  overflow-y: auto;
}

/* ---------- Toast ---------- */
.toast-wrap {
  position: fixed;
  bottom: calc(var(--nav-h) + 20px + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 200;
}
.toast {
  background: var(--ink);
  color: var(--bg);
  font-size: 0.8125rem;
  letter-spacing: 1px;
  padding: 9px 22px;
  border-radius: 999px;
  box-shadow: var(--shadow-lg);
  animation: toast-in .25s ease;
  white-space: nowrap;
}
.toast.err { background: var(--danger); color: #f7f1e3; }
@keyframes toast-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; } }

/* ============================================================
   手机端（≤720px）：底部标签栏 · App 式布局
   ============================================================ */
@media (max-width: 720px) {
  .topbar { padding: calc(12px + env(safe-area-inset-top)) 18px 6px; }
  .brand-mark { width: 38px; height: 38px; }
  .brand-text h1 { font-size: 1.0625rem; }

  main {
    padding: 2px 16px calc(var(--nav-h) + 28px + env(safe-area-inset-bottom));
  }

  .tabs {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 90;
    margin: 0;
    padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
    background: color-mix(in srgb, var(--surface) 92%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0;
  }
  .tab {
    flex-direction: column;
    gap: 3px;
    padding: 7px 0;
    font-size: 9.5px; /* 固定：7 个标签在窄屏空间极紧，且导航栏高度参与布局计算 */
    letter-spacing: 0;
    border-radius: 10px;
    justify-content: center;
  }
  .tab svg { width: 20px; height: 20px; }
  .tab.active { background: transparent; color: var(--accent); }
  .tab.active svg { stroke-width: 2; }
  .tab .badge {
    position: absolute;
    top: 2px;
    left: calc(50% + 6px);
    min-width: 17px;
    line-height: 15px;
    font-size: 9.5px;
  }
  .tab.active .badge { background: var(--accent-soft); color: var(--accent); }
  .tab.active .badge-due, .badge-due { background: var(--persimmon); color: #f7f1e3; }

  .panel { padding: 18px 16px; margin-bottom: 16px; }
  .settings-actions { gap: 7px; }
  .settings-actions .btn { padding: 10px 5px; font-size: 0.7812rem; letter-spacing: .5px; }
  .panel-head-row .btn-group { width: 100%; }
  .panel-head-row .btn-group .btn { flex: 1; }

  .capture-row { flex-direction: column; }
  .capture-row .btn { width: 100%; padding: 13px; }

  .wc-head { padding-right: 0; }
  .word-card { display: flex; flex-direction: column; }
  .wc-actions {
    position: static;
    order: 99;
    margin: 12px -6px -8px;
    justify-content: flex-end;
    border-top: 1px dashed var(--line);
    padding-top: 4px;
  }
  .word-card:not(.collapsed) .wc-head { padding-right: 36px; }
  .icon-btn { padding: 9px 12px; }

  .review-stats { grid-template-columns: repeat(2, 1fr); }
  /* 卡片撑满可用屏高：视口高度减去顶栏/进度条/评分区/底部导航 */
  .flashcard-inner {
    min-height: clamp(320px, calc(100dvh - 350px), 680px);
  }
  .flashcard-face { padding: 28px 24px; }
  .fc-term { font-size: 1.75rem; }
  .fc-answer { font-size: 1.4375rem; }
  .fc-detail { font-size: 0.875rem; }
  .grade { padding: 13px 2px; }
  .review-tip { margin-top: 12px; }

  .btn-group.wrap .btn { flex: 1 1 45%; }
  .review-options .field { min-width: 100%; }
  .btn-lg { width: 100%; }

  .toast-wrap { width: calc(100% - 40px); }
  .toast { white-space: normal; text-align: center; }
}

/* 桌面端隐藏底栏徽标错位问题的兜底 */
@media (min-width: 721px) {
  .tab .badge { position: static; }
}

/* ============ 行业欢迎页 ============ */

.welcome {
  position: fixed; inset: 0; z-index: 300;
  background: var(--bg);
  overflow-y: auto;
  padding: calc(24px + env(safe-area-inset-top)) 20px calc(28px + env(safe-area-inset-bottom));
  display: flex; flex-direction: column; align-items: center;
}
body.welcome-open { overflow: hidden; }

.welcome-inner {
  width: 100%; max-width: 500px; margin: auto;
  display: flex; flex-direction: column; align-items: center; text-align: center;
}

.welcome-art { width: min(280px, 60vw); }
.welcome-art svg { width: 100%; height: auto; display: block; }
.w-blob-1 { fill: #efc9be; }
.w-blob-2 { fill: #bf6a48; opacity: .85; mix-blend-mode: multiply; }
[data-theme="dark"] .w-blob-1 { fill: #4c3831; }
[data-theme="dark"] .w-blob-2 { fill: #8a4f38; mix-blend-mode: normal; opacity: .8; }
.w-card rect { stroke: var(--ink); stroke-width: 2.4; }
.w-card line { stroke: var(--ink-soft); stroke-width: 2; stroke-linecap: round; }
.w-card-back rect { fill: var(--surface); }
.w-card-front rect { fill: #f8eee3; }
[data-theme="dark"] .w-card-front rect { fill: #302722; }
.w-card text { fill: var(--ink); font-family: Georgia, "Noto Serif SC", serif; }
.w-card-back text { font-size: 1.75rem; font-weight: 600; }
.w-card-letter { font-size: 3.875rem; font-style: italic; }
.w-swap path,
.w-spark path { fill: none; stroke: var(--ink); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.w-spark circle { fill: var(--ink); }

.welcome-title { font-size: 2rem; letter-spacing: .14em; margin: 8px 0 12px; font-weight: 600; color: var(--ink); }
.welcome-sub { color: var(--ink-soft); font-size: 0.875rem; line-height: 1.9; max-width: 410px; margin-bottom: 24px; }

.industry-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
  width: 100%; margin-bottom: 26px;
}
.industry-chip {
  font-family: inherit; text-align: left; cursor: pointer;
  background: var(--surface); border: 1.5px solid var(--line); border-radius: var(--radius);
  padding: 12px 14px; display: flex; flex-direction: column; gap: 2px;
  color: var(--ink); transition: border-color .15s, background .15s, transform .1s;
}
.industry-chip:active { transform: scale(.97); }
.industry-chip b { font-size: 0.9375rem; }
.industry-chip .chip-en { font-size: 0.6562rem; letter-spacing: .07em; color: var(--ink-faint); text-transform: uppercase; }
.industry-chip small { font-size: 0.75rem; color: var(--ink-soft); margin-top: 3px; }
.industry-chip.selected {
  border-color: var(--accent); background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px var(--accent);
}
/* 「不限行业」：整宽、虚线，读作「留空」而非又一个行业 */
.industry-chip.chip-none {
  grid-column: 1 / -1;
  border-style: dashed;
  background: transparent;
  flex-direction: row;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
}
.industry-chip.chip-none small { margin-top: 0; margin-left: auto; }
.industry-chip.chip-none.selected { background: var(--accent-soft); border-style: solid; }

.welcome-cta {
  min-width: 210px; border-radius: 999px;
  padding: 13px 36px; font-size: 1rem; letter-spacing: .22em;
}
.welcome-cta:disabled { opacity: .45; }

.welcome-close {
  position: fixed; top: calc(14px + env(safe-area-inset-top)); right: 16px; z-index: 2;
  width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line);
  background: var(--surface); color: var(--ink-soft);
  font-size: 1.25rem; line-height: 1; cursor: pointer;
}

.tab-icon { display: inline-flex; }

/* 设置页：行业 */
.industry-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; flex-wrap: wrap; }
.industry-current { font-size: 1rem; font-weight: 600; color: var(--ink); }
.industry-current .industry-en {
  font-size: 0.6875rem; letter-spacing: .08em; color: var(--ink-faint);
  text-transform: uppercase; margin-left: 6px; font-weight: 400;
}

@media (max-width: 400px) {
  .industry-chip { padding: 10px 12px; }
  .industry-chip b { font-size: 0.875rem; }
  .welcome-art { width: min(230px, 55vw); }
}

/* ============ 界面语言切换 ============ */

.lang-row { display: flex; gap: 10px; margin-bottom: 8px; }
.lang-btn.active {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}

.welcome-lang {
  position: fixed; top: calc(18px + env(safe-area-inset-top)); left: 20px; z-index: 2;
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8125rem; color: var(--ink-faint);
}
.welcome-lang .lang-btn {
  border: none; background: transparent; font: inherit; cursor: pointer;
  color: var(--ink-faint); letter-spacing: 1px; padding: 4px 2px;
}
.welcome-lang .lang-btn.active {
  color: var(--ink); font-weight: 600;
  border-bottom: 1.5px solid var(--ink);
  background: transparent;
}

/* ============ 输入计数 + 清空（录入提取 / 快速翻译） ============ */

.input-meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 6px;
}
.char-count {
  font-size: 0.75rem;
  color: var(--ink-faint);
  letter-spacing: .5px;
  font-variant-numeric: tabular-nums;
}
.char-count.over { color: var(--danger); font-weight: 600; }
.meta-trash {
  border: none;
  background: transparent;
  color: var(--ink-faint);
  cursor: pointer;
  padding: 5px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  transition: color .2s, background .2s;
}
.meta-trash:hover { color: var(--danger); background: var(--surface-soft); }
.meta-trash svg {
  width: 17px; height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.meta-edit {
  margin-right: auto;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.7812rem;
  letter-spacing: 1px;
  padding: 4px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}
.meta-edit:hover { border-color: var(--ink); color: var(--ink); }

/* ============ 图片来源选择（拍照 / 相册） ============ */

.sheet-backdrop {
  position: fixed;
  inset: 0;
  z-index: 400;
  background: rgba(43, 30, 26, .45);
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.sheet {
  width: min(480px, 100%);
  background: var(--surface);
  border-radius: 18px 18px 0 0;
  padding: 20px 20px calc(20px + env(safe-area-inset-bottom));
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 10px;
  animation: sheet-up .2s ease;
}
@keyframes sheet-up {
  from { transform: translateY(30%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.sheet-title {
  font-size: 0.875rem;
  letter-spacing: 3px;
  color: var(--ink-faint);
  text-align: center;
  margin-bottom: 4px;
  font-weight: 500;
}
.sheet-btn { width: 100%; padding: 13px; }
.sheet-cancel { border-color: transparent; color: var(--ink-faint); }

/* ============ 学习日历彩蛋 ============ */

.brand { cursor: pointer; border-radius: var(--radius); }
.brand:active .brand-mark { transform: scale(.94); }
.brand-mark { transition: transform .15s; }

.cal-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: var(--bg);
  overflow-y: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: calc(24px + env(safe-area-inset-top)) 18px calc(30px + env(safe-area-inset-bottom));
}
.cal-card {
  width: min(420px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 22px 20px;
  position: relative;
}
.cal-close {
  position: fixed;
  top: calc(14px + env(safe-area-inset-top));
  right: 16px;
  z-index: 2;
  border: none;
  background: transparent;
  color: var(--ink-faint);
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
  padding: 6px;
}
.cal-close:hover { color: var(--ink); }
.cal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
}
.cal-title-wrap { text-align: center; }
.cal-title { font-size: 1.25rem; letter-spacing: 2px; font-weight: 600; }
.cal-sub { font-size: 0.6875rem; color: var(--ink-faint); letter-spacing: 4px; margin-top: 2px; }
.cal-nav {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  width: 34px; height: 34px;
  border-radius: 50%;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}
.cal-nav:hover:not(:disabled) { border-color: var(--ink); color: var(--ink); }
.cal-nav:disabled { opacity: .3; cursor: default; }
.cal-week {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-bottom: 6px;
  text-align: center;
  font-size: 0.7188rem;
  color: var(--ink-faint);
  letter-spacing: 1px;
}
.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}
.cal-day {
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.8125rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform .12s, border-color .2s;
  font-variant-numeric: tabular-nums;
}
.cal-day.blank { border: none; background: transparent; cursor: default; }
.cal-day:disabled { opacity: .35; cursor: default; }
.cal-day:not(:disabled):not(.blank):hover { transform: scale(1.08); border-color: var(--ink); }
.cal-day.today { outline: 2px solid var(--accent); outline-offset: 1px; font-weight: 700; }
.cal-day.tier-1, .cal-swatch.tier-1 { background: #e7d5b4; border-color: #d8c298; color: #6b5033; }
.cal-day.tier-2, .cal-swatch.tier-2 { background: #cfa070; border-color: #bd8d5c; color: #4a301c; }
.cal-day.tier-3, .cal-swatch.tier-3 { background: var(--persimmon); border-color: var(--persimmon); color: #f7f1e3; }
[data-theme="dark"] .cal-day.tier-1, [data-theme="dark"] .cal-swatch.tier-1 { background: #4a3c2c; border-color: #5d4b36; color: #d9c6a8; }
[data-theme="dark"] .cal-day.tier-2, [data-theme="dark"] .cal-swatch.tier-2 { background: #8a5f41; border-color: #9d6f4e; color: #f3e3d3; }
.cal-legend {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 5px;
  margin-top: 14px;
  font-size: 0.7188rem;
  color: var(--ink-faint);
}
.cal-swatch {
  width: 13px; height: 13px;
  border-radius: 3px;
  border: 1px solid var(--line);
  background: var(--bg);
  display: inline-block;
}
.cal-hint {
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--ink-faint);
  text-align: center;
  letter-spacing: 1px;
}

/* ---------- 学习小票 ---------- */

.receipt-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  padding: 14px 0 8px;
}
.receipt {
  --paper: #fdf9ee;
  --rc-ink: #46382e;
  --rc-faint: #9a8a7a;
  width: min(340px, 88vw);
  background: var(--paper);
  color: var(--rc-ink);
  font-family: "Courier New", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
  padding: 30px 24px 34px;
  position: relative;
  box-shadow: var(--shadow-lg);
  letter-spacing: .3px;
}
.receipt::before, .receipt::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 10px;
  background-size: 14px 10px;
  background-repeat: repeat-x;
}
.receipt::before {
  bottom: 100%;
  background-image:
    linear-gradient(135deg, var(--paper) 5px, transparent 0),
    linear-gradient(-135deg, var(--paper) 5px, transparent 0);
}
.receipt::after {
  top: 100%;
  background-image:
    linear-gradient(45deg, var(--paper) 5px, transparent 0),
    linear-gradient(-45deg, var(--paper) 5px, transparent 0);
}
.rc-brand {
  font-family: var(--font-serif);
  text-align: center;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 3px;
}
.rc-sub {
  text-align: center;
  font-size: 0.6875rem;
  letter-spacing: 2px;
  color: var(--rc-faint);
  margin-top: 2px;
}
.rc-dash {
  border-top: 1.5px dashed #cbbba6;
  margin: 12px 0;
}
.rc-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.rc-head { color: var(--rc-faint); font-size: 0.7188rem; letter-spacing: 1px; }
.rc-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 3px 0;
}
.rc-idx { color: var(--rc-faint); font-size: 0.7188rem; }
.rc-name { flex: 1; }
.rc-qty { font-weight: 700; }
.rc-total { font-size: 1rem; font-weight: 700; margin-bottom: 2px; }
.rc-empty {
  text-align: center;
  color: var(--rc-faint);
  padding: 10px 0;
  letter-spacing: 1px;
}
.rc-mood-label {
  text-align: center;
  font-size: 0.6875rem;
  letter-spacing: 3px;
  color: var(--rc-faint);
}
.rc-mood { text-align: center; font-size: 2.5rem; line-height: 1.4; }
.rc-mood-name { text-align: center; font-weight: 700; letter-spacing: 2px; }
.rc-quote {
  text-align: center;
  font-size: 0.75rem;
  color: var(--rc-faint);
  font-style: italic;
  margin-bottom: 12px;
}
.rc-barcode {
  width: 78%;
  height: 34px;
  margin: 0 auto;
  display: block;
  fill: var(--rc-ink);
}
.rc-code {
  text-align: center;
  font-size: 0.7188rem;
  letter-spacing: 6px;
  margin-top: 3px;
}
.rc-foot {
  text-align: center;
  font-size: 0.6562rem;
  letter-spacing: 1.5px;
  color: var(--rc-faint);
  margin-top: 12px;
}
.receipt-back { min-width: 160px; }

/* ============ 译文润色 ============ */

.mode-switch-3 .mode-btn { letter-spacing: 1px; font-size: 0.8125rem; padding: 10px 2px; }

.pol-field { margin-top: 14px; }
.pol-label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 2px;
  color: var(--ink-faint);
  margin-bottom: 6px;
}
.pol-field .input-meta { margin-top: 4px; }

.pol-summary {
  margin-top: 18px;
  border-left: 3px solid var(--accent);
  background: var(--surface-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
}
.pol-summary h4 {
  font-size: 0.7188rem;
  letter-spacing: 3px;
  color: var(--ink-faint);
  font-weight: 500;
  margin-bottom: 5px;
}
.pol-summary p { font-size: 0.875rem; line-height: 1.85; color: var(--ink); }

.pol-changes { margin-top: 20px; }
.pol-changes > h4 {
  font-size: 0.7188rem;
  letter-spacing: 3px;
  color: var(--ink-faint);
  font-weight: 500;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.pol-count {
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: 1px 8px;
  font-size: 0.6875rem;
  letter-spacing: 0;
}
[data-theme="dark"] .pol-count { color: var(--ink); }

.pol-change {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 10px;
  background: var(--surface);
}
.pol-issue {
  display: inline-block;
  font-size: 0.7188rem;
  letter-spacing: 1px;
  color: var(--persimmon);
  border: 1px solid var(--persimmon);
  border-radius: 999px;
  padding: 1px 10px;
  margin-bottom: 9px;
}
.pol-diff { display: flex; flex-direction: column; gap: 6px; }
.pol-before, .pol-after {
  display: flex;
  gap: 8px;
  font-size: 0.875rem;
  line-height: 1.8;
  word-break: break-word;
}
.pol-mark {
  flex-shrink: 0;
  font-size: 0.6875rem;
  letter-spacing: 1px;
  width: 22px;
  height: 20px;
  border-radius: 4px;
  display: grid;
  place-items: center;
  margin-top: 3px;
}
.pol-before .pol-mark { background: var(--danger-soft); color: var(--danger); }
.pol-after .pol-mark { background: var(--accent-soft); color: var(--accent); }
[data-theme="dark"] .pol-after .pol-mark { color: var(--ink); }
.pol-before { color: var(--ink-soft); text-decoration: line-through solid var(--ink-faint) 1px; }
.pol-before .pol-mark { text-decoration: none; }
.pol-after { color: var(--ink); font-weight: 500; }
.pol-why {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ============ 阅读：书架 ============ */

.shelf-grid { display: flex; flex-direction: column; gap: 12px; }

.book-card {
  display: flex;
  align-items: stretch;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.book-open {
  flex: 1;
  min-width: 0;
  text-align: left;
  font: inherit;
  color: var(--ink);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.book-title { font-size: 1rem; font-weight: 600; letter-spacing: 1px; }
.book-author { font-size: 0.7812rem; color: var(--ink-soft); }
.book-meta { font-size: 0.7188rem; color: var(--ink-faint); letter-spacing: 1px; margin-top: 2px; }
.book-progress {
  height: 3px;
  background: var(--surface-soft);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 8px;
}
.book-progress i { display: block; height: 100%; background: var(--accent); }
.book-pct { font-size: 0.6875rem; color: var(--ink-faint); margin-top: 4px; }
.book-del { align-self: center; margin-right: 10px; flex-shrink: 0; }

/* ============ 阅读：阅读器 ============ */

.reader-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 0;
}

/* 顶栏与工具面板一起常驻顶部：读长章节时导航随手可及；
   也避免「为了够到按钮而先滚动页面」——那会在保存阅读位置前把位置滚没，
   同时确保在任意位置点 ⋯ 都能就地看到工具面板，而不是展开在屏幕上方之外。 */
.reader-head {
  position: sticky;
  top: 0;
  z-index: 60;
  padding: 8px 0 12px;
  margin-bottom: 12px;
  background: color-mix(in srgb, var(--bg) 95%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  max-height: 78vh;
  overflow-y: auto;
}
.reader-head .reader-tools { margin-bottom: 0; margin-top: 12px; }
.reader-bar select { flex: 1; min-width: 0; font-size: 0.8438rem; padding: 8px 30px 8px 12px; }
.reader-bar .btn { flex-shrink: 0; }

.reader-tools {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.reader-tools-row { display: flex; align-items: center; gap: 12px; }
.reader-tools-label { font-size: 0.75rem; letter-spacing: 2px; color: var(--ink-faint); flex-shrink: 0; }

.seg {
  display: flex;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex: 1;
}
.seg-btn {
  flex: 1;
  border: none;
  background: transparent;
  font: inherit;
  font-size: 0.7812rem;
  letter-spacing: 1px;
  color: var(--ink-soft);
  padding: 7px 0;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.seg-btn + .seg-btn { border-left: 1px solid var(--line); }
.seg-btn.active { background: var(--accent); color: var(--accent-ink); }

.reader-meta {
  text-align: center;
  padding: 8px 0 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}
.reader-book { font-size: 0.75rem; color: var(--ink-faint); letter-spacing: 2px; }
.reader-book span { opacity: .7; }
.reader-chapter-title { font-size: 1.25rem; font-weight: 600; letter-spacing: 1px; margin: 6px 0 4px; }
.reader-pos { font-size: 0.7188rem; color: var(--ink-faint); letter-spacing: 1px; }

.reader-body {
  user-select: text;
  -webkit-user-select: text;
  padding-bottom: 10px;
}
.rp { margin-bottom: 18px; }
.rp-src {
  font-size: var(--read-size, 17px);
  line-height: 1.95;
  text-align: justify;
  word-break: break-word;
  hyphens: auto;
}
.rp-zh {
  font-size: calc(var(--read-size, 17px) - 1px);
  line-height: 1.95;
  color: var(--ink-soft);
  border-left: 2px solid var(--line-strong);
  padding-left: 12px;
  margin-top: 8px;
  text-align: justify;
  word-break: break-word;
}
.rp-h .rp-src { font-size: calc(var(--read-size, 17px) + 2.5px); font-weight: 600; letter-spacing: 1px; text-align: left; margin-top: 26px; }
.rp-h .rp-zh { font-size: calc(var(--read-size, 17px) - .5px); font-weight: 600; }
.rp-quote .rp-src { padding-left: 14px; border-left: 2px solid var(--line); color: var(--ink-soft); font-style: italic; }

.reader-body.mode-src .rp-zh { display: none; }
.reader-body.mode-zh .rp-src { display: none; }
.reader-body.mode-zh .rp-zh { border-left: none; padding-left: 0; color: var(--ink); font-size: var(--read-size, 17px); }

.reader-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 24px 0 10px;
  border-top: 1px solid var(--line);
  margin-top: 20px;
}
.reader-nav .btn { flex: 1; }
.reader-nav .btn:disabled { opacity: .35; }

/* 选词候选浮条 */
.pickbar {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(var(--nav-h) + 12px + env(safe-area-inset-bottom));
  z-index: 250;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-lg);
  padding: 8px 10px 8px 18px;
  max-width: calc(100% - 32px);
  animation: toast-in .18s ease;
}
.pickbar-count { font-size: 0.8125rem; color: var(--ink-soft); letter-spacing: 1px; white-space: nowrap; }
.pickbar .btn { flex-shrink: 0; }

@media (min-width: 721px) {
  .pickbar { bottom: 24px; }
}

/* ---------- 阅读：字号调节与工具分组 ---------- */

.font-ctl {
  display: flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.font-btn {
  border: none;
  background: transparent;
  font: inherit;
  font-size: 0.875rem;
  color: var(--ink-soft);
  padding: 6px 14px;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.font-btn:hover:not(:disabled) { background: var(--surface-soft); color: var(--ink); }
.font-btn:disabled { opacity: .3; cursor: default; }
.font-size {
  min-width: 30px;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  padding: 6px 0;
}

.tool-group {
  border-top: 1px dashed var(--line);
  padding-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.tool-group-label {
  font-size: 0.7188rem;
  letter-spacing: 3px;
  color: var(--ink-faint);
}
.tool-group .panel-hint { margin-bottom: 0; }
.tool-group .btn-group { gap: 8px; }
.tool-group-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.trans-progress { font-size: 0.7188rem; color: var(--ink-faint); letter-spacing: .5px; }

/* ============ 批量翻译：章节选择 ============ */

.modal-tall { display: flex; flex-direction: column; max-height: 88vh; }

.picker-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 4px 0 12px;
}
.picker-actions .btn { flex: 1; min-width: 84px; }

.picker-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg);
  -webkit-overflow-scrolling: touch;
}
.picker-item {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 11px 14px;
  cursor: pointer;
  border-bottom: 1px solid var(--line);
  transition: background .12s;
}
.picker-item:last-child { border-bottom: none; }
.picker-item:hover { background: var(--surface-soft); }
.picker-item.on { background: var(--accent-soft); }
.picker-item input {
  width: 17px; height: 17px;
  margin-top: 3px;
  accent-color: var(--accent);
  flex-shrink: 0;
}
.pi-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.pi-title {
  font-size: 0.9062rem;
  color: var(--ink);
  line-height: 1.5;
  word-break: break-word;
}
.pi-meta { font-size: 0.7188rem; color: var(--ink-faint); letter-spacing: .5px; }
.pi-meta b { color: var(--accent); font-weight: 600; }
[data-theme="dark"] .pi-meta b { color: var(--persimmon); }

.picker-warn {
  font-size: 0.75rem;
  color: var(--danger);
  line-height: 1.7;
  margin-top: 10px;
}
.picker-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}
.picker-summary { font-size: 0.8125rem; color: var(--ink-soft); letter-spacing: .5px; }

/* ============ 桌面端（Windows / macOS 浏览器） ============ */

@media (min-width: 900px) {
  /* 长篇正文按可读行宽收窄；工具栏仍占满宽度便于操作 */
  .reader-meta,
  .reader-body,
  .reader-nav {
    /* 按字号伸缩：固定像素宽在大字号下每行只剩十几个字符。
       38em 在 17px 时约 646px（与原先一致），字号调大时行宽同步变宽，
       每行字数始终保持在舒适区间。 */
    max-width: min(38em, 100%);
    margin-left: auto;
    margin-right: auto;
  }
  .reader-body { font-size: var(--read-size, 17px); }
  .reader-body { padding-bottom: 20px; }

  /* 书架在宽屏下排成两列 */
  .shelf-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  /* 桌面端有鼠标悬停，给可点区域更明确的反馈 */
  .book-card { transition: border-color .15s, box-shadow .15s; }
  .book-card:hover { border-color: var(--ink-soft); box-shadow: var(--shadow-lg); }

  /* 章节选择弹窗在大屏上给更多可视行数 */
  .modal-tall { max-height: 82vh; }
  .picker-list { max-height: 52vh; }
}
.book-acts { display: flex; flex-direction: column; justify-content: center; gap: 2px; margin-right: 8px; flex-shrink: 0; }

/* ---------- 闪卡来源回链 ---------- */

.wc-source {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: 100%;
  margin-top: 10px;
  padding: 4px 12px 4px 9px;
  border: 1px dashed var(--line);
  border-radius: 999px;
  background: transparent;
  font: inherit;
  font-size: 0.75rem;
  color: var(--ink-faint);
  cursor: pointer;
  transition: border-color .15s, color .15s, background .15s;
}
.wc-source:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
[data-theme="dark"] .wc-source:hover { color: var(--ink); }
.wc-source svg {
  width: 13px; height: 13px;
  flex-shrink: 0;
  fill: none; stroke: currentColor; stroke-width: 1.6;
  stroke-linecap: round; stroke-linejoin: round;
}
.wc-source span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.fc-source { color: var(--ink-faint); font-size: 0.7812rem; }

/* 从闪卡跳回原文时短暂点亮该段 */
.rp-focus .rp-src {
  background: var(--accent-soft);
  box-shadow: 0 0 0 6px var(--accent-soft);
  border-radius: 3px;
  animation: rp-fade 2.6s ease forwards;
}
@keyframes rp-fade {
  0%, 55% { background: var(--accent-soft); box-shadow: 0 0 0 6px var(--accent-soft); }
  100% { background: transparent; box-shadow: 0 0 0 6px transparent; }
}

/* ---------- 界面字号设置 ---------- */
#ui-scale-row { margin-bottom: 12px; }
.scale-sample {
  font-size: 0.9063rem;
  color: var(--ink);
  line-height: 1.9;
  padding: 10px 14px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

/* ============================================================
   墨水屏模式
   ------------------------------------------------------------
   暖纸配色在灰阶下会塌成低对比：背景 241 灰、正文 57 灰，
   对比度仅约 4.3:1；而墨水屏白色反射率本就只有 70% 左右，
   叠加后整体发灰。这里改用纯黑白，并去掉墨水屏渲染不了的
   阴影、毛玻璃与动画（它们会变成抖动噪点和残影）。
   ============================================================ */

[data-eink] {
  /* 宋体的横画是发丝细线，在 227ppi 墨水屏上会被抗锯齿成浅灰而发虚；
     黑体笔画粗细均匀，配合 500 字重才能出「实」的观感。 */
  --font-ui: var(--font-sans);
  --weight-body: 500;
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-soft: #eeeeee;
  --ink: #000000;
  --ink-soft: #111111;
  --ink-faint: #3d3d3d;        /* 墨水屏上层级靠字号字重区分，不靠灰度 */
  --line: #999999;
  --line-strong: #000000;
  --accent: #000000;
  --accent-ink: #ffffff;
  --accent-soft: #e0e0e0;
  --persimmon: #000000;
  --persimmon-soft: #dcdcdc;
  --mustard: #333333;
  --danger: #000000;
  --danger-soft: #dcdcdc;
  --shadow: none;
  --shadow-lg: none;
}

/* 阴影与毛玻璃在墨水屏上是抖动噪点，一律去掉，改用实线边框区分层次 */
[data-eink] .panel,
[data-eink] .book-card,
[data-eink] .modal,
[data-eink] .sheet,
[data-eink] .receipt,
[data-eink] .toast,
[data-eink] .sel-fab,
[data-eink] .pickbar,
[data-eink] .cal-card {
  box-shadow: none;
  border: 1px solid var(--line);
}
[data-eink] .tabs,
[data-eink] .reader-head {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: #ffffff;
}

/* 动画与过渡会在墨水屏上拖出残影 */
[data-eink] *,
[data-eink] *::before,
[data-eink] *::after {
  transition: none !important;
  animation: none !important;
}

/* 选中态靠反白而非浅色块，保证在灰阶下依然醒目 */
[data-eink] .tab.active,
[data-eink] .mode-btn.active,
[data-eink] .seg-btn.active,
[data-eink] .btn-primary {
  background: #000000;
  color: #ffffff;
  border-color: #000000;
}
[data-eink] .tab.active svg { stroke-width: 2.2; }
[data-eink] .industry-chip.selected,
[data-eink] .picker-item.on,
[data-eink] .config-chip.active { background: #e0e0e0; box-shadow: inset 0 0 0 2px #000; }
[data-eink] .tok.sel { background: #000; color: #fff; box-shadow: none; }
[data-eink] .rp-focus .rp-src { background: #d8d8d8; box-shadow: 0 0 0 6px #d8d8d8; }

/* 学习日历：四档改用灰阶梯度，边界清晰 */
[data-eink] .cal-day.tier-1, [data-eink] .cal-swatch.tier-1 { background: #d5d5d5; border-color: #999; color: #000; }
[data-eink] .cal-day.tier-2, [data-eink] .cal-swatch.tier-2 { background: #8f8f8f; border-color: #555; color: #fff; }
[data-eink] .cal-day.tier-3, [data-eink] .cal-swatch.tier-3 { background: #000000; border-color: #000; color: #fff; }
[data-eink] .cal-day.today { outline: 2px solid #000; }

/* 译文与引用块靠加粗竖线区分，不靠颜色 */
[data-eink] .rp-zh { border-left-width: 3px; border-left-color: #000; color: #2b2b2b; }
[data-eink] .pol-summary { border-left-width: 4px; }
[data-eink] .pol-before { color: #555; }
[data-eink] .pol-issue { border-width: 1.5px; }

.eink-toggle { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; cursor: pointer; font-size: 0.9063rem; }
.eink-toggle input { width: 18px; height: 18px; accent-color: var(--accent); flex-shrink: 0; }

/* 大屏（平板 / 10.3" 墨水屏 / 桌面）：卡片自动分列，避免一列到底浪费大半屏。
   列宽以 em 为基准，因此列数随字号自适应——字号调到很大时会自动退回单列，
   否则每列过窄会把长单词硬拆开。 */
@media (min-width: 900px) {
  .card-list {
    grid-template-columns: repeat(auto-fit, minmax(min(20em, 100%), 1fr));
    align-items: start;
  }
}

/* 墨水屏：标题与强调再加一档字重，纯灰度屏上层级只能靠字形轻重表达 */
[data-eink] .panel-title,
[data-eink] .wc-term,
[data-eink] .fc-term,
[data-eink] .fc-answer,
[data-eink] .book-title,
[data-eink] .reader-chapter-title,
[data-eink] .brand-text h1 { font-weight: 700; }

[data-eink] .panel-hint,
[data-eink] .wc-note,
[data-eink] .cand-reason,
[data-eink] .pi-meta,
[data-eink] .wc-due { font-weight: 500; }

/* 中文字形在墨水屏上不需要额外的字距，收紧以免笔画之间灰边叠加 */
[data-eink] body { letter-spacing: 0; }

/* ---------- 字体选择 ---------- */
[data-font="sans"] { --font-ui: var(--font-sans); }
[data-font="serif"] { --font-ui: var(--font-serif); }
.scale-ctl { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.font-size#ui-scale-label { min-width: 62px; }

/* 大幅放大后，长英文词条／答案可能单个单词就宽过视口，允许其断行 */
.wc-term, .fc-term, .fc-answer, .rc-name, .pi-title, .book-title {
  overflow-wrap: anywhere;
  word-break: normal;
}

/* ---------- 外部取词收件箱 ---------- */
.inbox-panel { border-style: dashed; }
.inbox-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.inbox-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 6px 5px 14px;
  font-size: 0.875rem;
  color: var(--ink);
  background: var(--surface);
  max-width: 100%;
}
.inbox-chip b { font-weight: 600; overflow-wrap: anywhere; }
.inbox-chip small { color: var(--ink-faint); font-size: 0.6875rem; }
.inbox-chip .chip-del {
  border: none; background: transparent; color: var(--ink-faint);
  font: inherit; font-size: 0.875rem; line-height: 1;
  padding: 3px 6px; border-radius: 50%; cursor: pointer; flex-shrink: 0;
}
.inbox-chip .chip-del:hover { color: var(--danger); background: var(--surface-soft); }