/* ─── 强制横向书写：抵御预览 / 嵌套 iframe 环境注入的竖排（古书式）样式 ─── */
html, body {
  writing-mode: horizontal-tb !important;
  direction: ltr !important;
  width: 100%;
  box-sizing: border-box;
}

/* ─── 默认主题：柔雾粉 ─── */
[data-theme="default"] {
  --bg: #fff5f8;
  --card: #ffffff;
  --accent: #ff8fb3;
  --accent-light: #ffd6e4;
  --accent-dark: #d65a87;
  --text: #4a3f45;
  --muted: #8a7a82;
  --header-bg: linear-gradient(135deg, #ffe3ec 0%, #fff0f5 100%);
  --shadow: 0 8px 24px rgba(214, 90, 135, 0.14);
  --shadow-hover: 0 12px 32px rgba(214, 90, 135, 0.2);
  --modal-overlay: rgba(74, 63, 69, 0.45);
  --radius: 16px;
}

/* ─── 主题 1：极夜墨蓝（深沉高级） ─── */
[data-theme="midnight"] {
  --bg: #0f172a;
  --card: #1e293b;
  --accent: #60a5fa;
  --accent-light: #1e3a5f;
  --accent-dark: #93c5fd;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --header-bg: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --shadow: 0 8px 24px rgba(96, 165, 250, 0.12);
  --shadow-hover: 0 12px 32px rgba(96, 165, 250, 0.22);
  --modal-overlay: rgba(0, 0, 0, 0.6);
  --radius: 16px;
}

/* ─── 主题 2：琥珀暖阳（温暖复古） ─── */
[data-theme="amber"] {
  --bg: #fef3c7;
  --card: #fffbeb;
  --accent: #d97706;
  --accent-light: #fde68a;
  --accent-dark: #92400e;
  --text: #451a03;
  --muted: #92400e;
  --header-bg: linear-gradient(135deg, #fde68a 0%, #fef3c7 100%);
  --shadow: 0 8px 24px rgba(217, 119, 6, 0.14);
  --shadow-hover: 0 12px 32px rgba(217, 119, 6, 0.22);
  --modal-overlay: rgba(69, 26, 3, 0.4);
  --radius: 16px;
}

/* ─── 主题 3：翡翠森林（自然宁静） ─── */
[data-theme="emerald"] {
  --bg: #ecfdf5;
  --card: #ffffff;
  --accent: #059669;
  --accent-light: #a7f3d0;
  --accent-dark: #065f46;
  --text: #1f2937;
  --muted: #6b7280;
  --header-bg: linear-gradient(135deg, #d1fae5 0%, #ecfdf5 100%);
  --shadow: 0 8px 24px rgba(5, 150, 105, 0.14);
  --shadow-hover: 0 12px 32px rgba(5, 150, 105, 0.22);
  --modal-overlay: rgba(31, 41, 55, 0.4);
  --radius: 16px;
}

/* ─── 主题 4：暗夜紫晶（科幻炫酷） ─── */
[data-theme="amethyst"] {
  --bg: #1a1025;
  --card: #2d1b4e;
  --accent: #a855f7;
  --accent-light: #3b1f6e;
  --accent-dark: #c084fc;
  --text: #f3e8ff;
  --muted: #a78bfa;
  --header-bg: linear-gradient(135deg, #1a1025 0%, #2d1b4e 100%);
  --shadow: 0 8px 24px rgba(168, 85, 247, 0.14);
  --shadow-hover: 0 12px 32px rgba(168, 85, 247, 0.25);
  --modal-overlay: rgba(0, 0, 0, 0.6);
  --radius: 16px;
}

/* ─── 主题 5：深海幽蓝（清冷通透） ─── */
[data-theme="ocean"] {
  --bg: #00121f;
  --card: #002a3a;
  --accent: #22d3ee;
  --accent-light: #0e4d5c;
  --accent-dark: #67e8f9;
  --text: #cffafe;
  --muted: #67e8f9;
  --header-bg: linear-gradient(135deg, #00121f 0%, #002a3a 100%);
  --shadow: 0 8px 24px rgba(34, 211, 238, 0.14);
  --shadow-hover: 0 12px 32px rgba(34, 211, 238, 0.25);
  --modal-overlay: rgba(0, 0, 0, 0.6);
  --radius: 16px;
}

/* ─── 主题 6：落日余晖（浪漫渐变） ─── */
[data-theme="sunset"] {
  --bg: #2a0a2e;
  --card: #3d1430;
  --accent: #fb7185;
  --accent-light: #5b1f3a;
  --accent-dark: #fda4af;
  --text: #ffe4e6;
  --muted: #f9a8d4;
  --header-bg: linear-gradient(135deg, #2a0a2e 0%, #7c2d4a 100%);
  --shadow: 0 8px 24px rgba(251, 113, 133, 0.16);
  --shadow-hover: 0 12px 32px rgba(251, 113, 133, 0.26);
  --modal-overlay: rgba(20, 5, 20, 0.6);
  --radius: 16px;
}

/* ─── 主题 7：樱雾灰粉（高级低饱和） ─── */
[data-theme="sakura"] {
  --bg: #f4f1f3;
  --card: #ffffff;
  --accent: #c9a9b8;
  --accent-light: #ece4e9;
  --accent-dark: #9c7c8c;
  --text: #4a4248;
  --muted: #8c7f87;
  --header-bg: linear-gradient(135deg, #ece4e9 0%, #f4f1f3 100%);
  --shadow: 0 8px 24px rgba(201, 169, 184, 0.18);
  --shadow-hover: 0 12px 32px rgba(201, 169, 184, 0.28);
  --modal-overlay: rgba(74, 66, 72, 0.35);
  --radius: 16px;
}

/* ─── 主题 8：石墨黑金（奢华质感） ─── */
[data-theme="graphite"] {
  --bg: #0d0d0d;
  --card: #1a1a1a;
  --accent: #d4af37;
  --accent-light: #3a3320;
  --accent-dark: #f0d77b;
  --text: #e8e3d3;
  --muted: #b0a878;
  --header-bg: linear-gradient(135deg, #0d0d0d 0%, #1a1a1a 100%);
  --shadow: 0 8px 24px rgba(212, 175, 55, 0.12);
  --shadow-hover: 0 12px 32px rgba(212, 175, 55, 0.22);
  --modal-overlay: rgba(0, 0, 0, 0.65);
  --radius: 16px;
}

/* ─── 主题 9：薄荷青瓷（清新治愈） ─── */
[data-theme="mint"] {
  --bg: #e6f7f1;
  --card: #ffffff;
  --accent: #2dd4bf;
  --accent-light: #b8efe6;
  --accent-dark: #0f766e;
  --text: #134e4a;
  --muted: #5b9a90;
  --header-bg: linear-gradient(135deg, #b8efe6 0%, #e6f7f1 100%);
  --shadow: 0 8px 24px rgba(45, 212, 191, 0.16);
  --shadow-hover: 0 12px 32px rgba(45, 212, 191, 0.26);
  --modal-overlay: rgba(19, 78, 74, 0.35);
  --radius: 16px;
}

:root {
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.75;
  min-height: 100vh;
  transition: background 0.5s ease, color 0.5s ease;
}

.site-header {
  text-align: center;
  padding: 36px 16px 20px;
  background: var(--header-bg);
  border-bottom: 1px solid var(--accent-light);
  transition: background 0.5s ease, border-color 0.5s ease;
}

.site-header h1 {
  margin: 0;
  font-size: 1.9rem;
  color: var(--accent-dark);
  letter-spacing: 1px;
}

.subtitle {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ── 故事列表（首页） ── */

.story-list-view {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 14px 0;
}

.story-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.5s ease;
  position: relative;
}

.story-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.story-card h3 {
  margin: 0 0 6px;
  font-size: 1.15rem;
  color: var(--accent-dark);
}

.story-card .card-meta {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.55;
}

.story-card .word-count {
  display: inline-block;
  margin-top: 10px;
  background: var(--accent-light);
  color: var(--accent-dark);
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ── 书架式故事网格 ── */
.book-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px 14px;
  padding-top: 4px;
}

@media (max-width: 540px) {
  .book-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.book-card {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.book-card:hover {
  transform: translateY(-4px);
}

.book-card:hover .book-cover {
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.18);
}

.book-cover {
  position: relative;
  aspect-ratio: 2 / 3;
  border-radius: 10px;
  overflow: hidden;
  background: var(--card);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.10);
}

.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.book-index {
  position: absolute;
  top: 6px;
  left: 6px;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 20px;
  letter-spacing: 0.5px;
}

.book-info {
  padding: 8px 2px 0;
}

.book-info h3 {
  margin: 0 0 3px;
  font-size: 0.92rem;
  line-height: 1.3;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-info .card-meta {
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.4;
  margin: 0 0 5px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-info .word-count {
  display: inline-block;
  font-size: 0.68rem;
  color: var(--accent-dark);
  background: var(--accent-light);
  padding: 1px 7px;
  border-radius: 10px;
}

.book-badge {
  position: absolute;
  top: 6px;
  right: 6px;
  font-size: 0.66rem;
  font-weight: 600;
  padding: 1px 8px;
  border-radius: 20px;
  color: #fff;
  letter-spacing: 0.5px;
  backdrop-filter: blur(2px);
}
.book-badge.level-easy   { background: rgba(34, 160, 110, 0.85); }
.book-badge.level-medium { background: rgba(214, 90, 135, 0.85); }
.book-badge.level-hard   { background: rgba(200, 80, 40, 0.88); }

.book-tag {
  display: inline-block;
  font-size: 0.66rem;
  color: var(--accent-dark);
  background: var(--accent-light);
  border: 1px solid var(--accent-light);
  padding: 1px 8px;
  border-radius: 10px;
  margin: 0 0 5px;
}

/* 书架筛选器 */
.filter-bar {
  margin: 4px 0 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.filter-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.filter-label {
  font-size: 0.8rem;
  color: var(--muted);
  margin-right: 4px;
  min-width: 34px;
}
.filter-pill {
  font-size: 0.8rem;
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid var(--accent-light);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s ease;
}
.filter-pill:hover { border-color: var(--accent); }
.filter-pill.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.filter-empty {
  color: var(--muted);
  text-align: center;
  padding: 30px 0;
  font-size: 0.9rem;
}

/* ── 返回按钮 ── */

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid var(--accent-light);
  color: var(--accent-dark);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  margin-bottom: 16px;
  transition: background 0.15s, color 0.15s;
}

.back-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.mode-switch {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 0 16px 6px;
}

.mode-switch button {
  border: 1px solid var(--accent-light);
  background: var(--card);
  color: var(--accent-dark);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.mode-switch button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ── 点击展开模式：默认只显中文，点击后就地展开英文 ── */
.expand-item .cn {
  display: none;
}
.expand-item.expanded .cn {
  display: inline;
}
.expand-item:not(.expanded) {
  border-bottom: 1px dashed var(--accent);
  cursor: pointer;
}
.expand-item.expanded {
  border-bottom: none;
}

.target-switch {
  margin-top: -2px;
}

.switch-label {
  font-size: 0.8rem;
  color: var(--muted);
  align-self: center;
  padding-right: 2px;
}

.container {
  max-width: 760px;
  margin: 0 auto 64px;
  padding: 0 20px;
}

.story-view {
  background: var(--card);
  padding: 32px 30px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: background 0.5s ease, box-shadow 0.5s ease;
}

.story-view h2 {
  margin: 0 0 8px;
  font-size: 1.45rem;
  color: var(--accent-dark);
}

.story-meta {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 24px;
}

.story-chapter {
  margin-bottom: 28px;
  text-align: justify;
  text-indent: 2em;
}

.story-chapter p {
  margin: 0 0 14px;
}

.word {
  display: inline;
  background: var(--accent-light);
  color: var(--accent-dark);
  padding: 0 !important;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.15s, transform 0.1s;
  user-select: text;
  -webkit-user-select: text;
  margin: 0 !important;
}

.word:hover {
  background: var(--accent);
  color: #fff;
}

.word .cn {
  font-weight: 400;
  opacity: 0.9;
}

/* ── 语块：跟随主题强调色（不再固定黄色） ── */
.chunk {
  display: inline;
  background: var(--accent);
  color: #000;
  border-radius: 4px;
  padding: 0 2px;
  cursor: pointer;
  font-weight: 400;
  transition: background 0.15s;
  user-select: text;
  -webkit-user-select: text;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.chunk:hover {
  background: var(--accent-dark);
}

.chunk .cn {
  font-weight: 400;
  opacity: 0.92;
}

/* 嵌套在语块里的单词：白底 + 主题强调色描边，落在彩色语块上更醒目（只高亮一次） */
.chunk .word {
  background: #fff !important;
  color: var(--accent-dark) !important;
  font-weight: 700;
  padding: 0 3px !important;
  margin: 0 1px !important;
  border-radius: 3px;
  box-shadow: inset 0 0 0 1px var(--accent);
}

.chunk .word:hover {
  background: var(--accent-dark) !important;
  color: #fff !important;
}

.hidden {
  display: none !important;
}

.modal {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  transition: background 0.5s ease;
}

.modal.open {
  display: flex;
}

.modal-card {
  background: var(--card);
  border-radius: var(--radius);
  width: 100%;
  max-width: 320px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
  position: relative;
  animation: pop 0.2s ease-out;
  transition: background 0.5s ease, box-shadow 0.5s ease;
}

@keyframes pop {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--muted);
  cursor: pointer;
}

.modal h3 {
  margin: 0 0 4px;
  font-size: 1.4rem;
  color: var(--accent-dark);
}

.modal-ipa {
  margin: 0 0 12px;
  font-size: 1rem;
  font-style: italic;
  color: var(--muted);
  letter-spacing: 0.3px;
}

.modal-def {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
}

.speak-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 0.95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s;
}

.speak-btn:hover {
  background: var(--accent-dark);
}

@media (max-width: 520px) {
  .story-list-view {
    padding: 8px 0;
    gap: 10px;
  }

  .story-card {
    padding: 18px 16px;
  }

  .story-card h3 {
    font-size: 1.05rem;
  }

  .story-view {
    padding: 22px 16px;
  }

  .story-chapter {
    text-align: justify;
    text-indent: 2em;
  }

  .mode-switch button {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  .word {
    font-size: 0.98rem;
  }

  .word .cn {
    font-size: 0.92em;
  }
}

/* ─── 主题下拉选择器 ─── */
.theme-select {
  display: flex;
  justify-content: center;
  padding: 12px 16px 16px;
  position: relative;
}

.theme-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--accent-light);
  color: var(--accent-dark);
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background 0.2s, border-color 0.2s, transform 0.1s;
}

.theme-btn:hover {
  border-color: var(--accent);
}

.theme-btn:active {
  transform: scale(0.97);
}

.theme-btn-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.theme-caret {
  font-size: 0.7rem;
  transition: transform 0.2s;
}

.theme-btn[aria-expanded="true"] .theme-caret {
  transform: rotate(180deg);
}

.theme-menu {
  position: absolute;
  top: calc(100% - 6px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  background: var(--card);
  border: 1px solid var(--accent-light);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  padding: 8px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
  width: min(340px, 90vw);
  opacity: 0;
  visibility: hidden;
  z-index: 50;
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
}

.theme-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.theme-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: none;
  border: none;
  border-radius: 10px;
  padding: 9px 12px;
  font-size: 0.88rem;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: background 0.15s;
}

.theme-item:hover {
  background: var(--accent-light);
}

.theme-item.active {
  background: var(--accent-light);
  color: var(--accent-dark);
  font-weight: 600;
}

.theme-item .theme-swatch {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.theme-item[data-theme="default"] .theme-swatch { background: linear-gradient(135deg, #ff8fb3, #ffd6e4); }
.theme-item[data-theme="midnight"] .theme-swatch { background: linear-gradient(135deg, #1e293b, #60a5fa); }
.theme-item[data-theme="amber"] .theme-swatch { background: linear-gradient(135deg, #d97706, #fde68a); }
.theme-item[data-theme="emerald"] .theme-swatch { background: linear-gradient(135deg, #059669, #a7f3d0); }
.theme-item[data-theme="amethyst"] .theme-swatch { background: linear-gradient(135deg, #2d1b4e, #a855f7); }
.theme-item[data-theme="ocean"] .theme-swatch { background: linear-gradient(135deg, #002a3a, #22d3ee); }
.theme-item[data-theme="sunset"] .theme-swatch { background: linear-gradient(135deg, #2a0a2e, #fb7185); }
.theme-item[data-theme="sakura"] .theme-swatch { background: linear-gradient(135deg, #c9a9b8, #ece4e9); }
.theme-item[data-theme="graphite"] .theme-swatch { background: linear-gradient(135deg, #1a1a1a, #d4af37); }
.theme-item[data-theme="mint"] .theme-swatch { background: linear-gradient(135deg, #b8efe6, #2dd4bf); }

/* ─── 书籍详情 / 章节目录 ─── */
.story-detail-view { padding-bottom: 48px; }

.detail-top, .story-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}
.back-btn {
  background: var(--card);
  color: var(--accent-dark);
  border: 1px solid var(--accent-light);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.15s, box-shadow 0.15s;
}
.back-btn:active { transform: scale(0.96); }
.story-header-actions { display: flex; gap: 8px; }
.wordlist-btn, .quiz-start-btn {
  background: var(--accent-light);
  color: var(--accent-dark);
  border: none;
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, filter 0.15s;
}
.wordlist-btn:active, .quiz-start-btn:active { transform: scale(0.96); }
.quiz-start-btn { background: var(--accent); color: #fff; }

.detail-cover {
  display: flex;
  justify-content: center;
  margin: 6px 0 18px;
}
.detail-cover img {
  width: min(220px, 60vw);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
}
.detail-title {
  text-align: center;
  font-size: 1.5rem;
  margin: 0 0 8px;
  color: var(--text);
}
.story-meta {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 22px;
}

.chapter-list { display: flex; flex-direction: column; gap: 14px; }
.chapter-item {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(0,0,0,0.03);
  transition: transform 0.18s, box-shadow 0.18s;
}
.chapter-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.chapter-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 8px; }
.chapter-no {
  font-size: 0.78rem;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}
.chapter-title { font-size: 1.08rem; font-weight: 700; color: var(--text); }
.chapter-stats {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 12px;
}
.chapter-actions { display: flex; gap: 10px; }
.btn-read, .btn-quiz {
  flex: 1;
  border: none;
  border-radius: 12px;
  padding: 10px 0;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, filter 0.15s;
}
.btn-read { background: var(--accent-light); color: var(--accent-dark); }
.btn-quiz { background: var(--accent); color: #fff; }
.btn-read:active, .btn-quiz:active { transform: scale(0.97); }

/* ─── 单章阅读 ─── */
.chapter-reading-title {
  font-size: 1.4rem;
  margin: 6px 0 6px;
  color: var(--text);
}
.chapter-reading-stats {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 12px;
}
.chapter-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 12px 0;
}
.chapter-nav .ch-nav {
  background: var(--card);
  color: var(--accent-dark);
  border: 1px solid var(--accent-light);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.15s;
}
.chapter-nav .ch-nav:active { transform: scale(0.96); }
.chapter-nav .ch-nav-ph { width: 1px; }
.chapter-nav-bottom { margin-top: 18px; border-top: 1px dashed var(--accent-light); padding-top: 14px; }


@media (max-width: 520px) {
  .theme-select {
    padding: 10px 12px 14px;
  }
  .theme-btn {
    padding: 8px 14px;
    font-size: 0.85rem;
  }
  .theme-menu {
    grid-template-columns: 1fr;
    width: min(280px, 88vw);
  }
}

/* ─── 故事页「开始测验」按钮 ─── */
.story-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
}

.story-header-top .back-btn {
  margin-bottom: 0;
}

.quiz-start-btn {
  flex-shrink: 0;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background 0.15s, transform 0.1s;
}

.quiz-start-btn:hover {
  background: var(--accent-dark);
}

.quiz-start-btn:active {
  transform: scale(0.97);
}

/* ─── 测验弹窗 ─── */
.quiz-card {
  max-width: 420px;
}

.quiz-top {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
}

.quiz-progress {
  font-size: 0.8rem;
  color: var(--muted);
  background: var(--accent-light);
  color: var(--accent-dark);
  padding: 2px 10px;
  border-radius: 999px;
  flex-shrink: 0;
}

.quiz-header {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent-dark);
}

.quiz-prompt {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  margin: 8px 0 16px;
  word-break: break-word;
}

.quiz-speak {
  display: block;
  margin: 0 auto 18px;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quiz-option {
  width: 100%;
  text-align: left;
  background: var(--card);
  border: 2px solid var(--accent-light);
  color: var(--text);
  padding: 13px 16px;
  border-radius: 12px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.quiz-option:hover:not(:disabled) {
  background: var(--accent-light);
  border-color: var(--accent);
}

.quiz-option:active:not(:disabled) {
  transform: scale(0.99);
}

.quiz-option:disabled {
  cursor: default;
}

.quiz-option.correct {
  background: #e6f9ed;
  border-color: #2bb673;
  color: #157347;
  font-weight: 600;
}

.quiz-option.wrong {
  background: #fdecec;
  border-color: #e35d5d;
  color: #c0392b;
}

.quiz-feedback {
  text-align: center;
  font-size: 0.95rem;
  font-weight: 600;
  min-height: 1.4em;
  margin: 14px 0 6px;
}

.quiz-feedback.correct-text {
  color: #157347;
}

.quiz-feedback.wrong-text {
  color: #c0392b;
}

.quiz-next {
  display: block;
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 13px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.15s, transform 0.1s;
}

.quiz-next:hover {
  background: var(--accent-dark);
}

.quiz-next:active {
  transform: scale(0.99);
}

/* ─── 测验结果页 ─── */
.quiz-result {
  text-align: center;
  padding: 10px 4px;
}

.quiz-result-title {
  margin: 0 0 16px;
  font-size: 1.4rem;
  color: var(--accent-dark);
}

.quiz-score {
  font-size: 1.15rem;
  line-height: 1.9;
  margin: 0 0 20px;
  color: var(--text);
}

.quiz-score b {
  color: var(--accent-dark);
  font-size: 1.4rem;
}

.quiz-pct {
  display: block;
  font-size: 0.95rem;
  color: var(--muted);
}

.quiz-result-btns {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quiz-result-btns .back-btn {
  margin-bottom: 0;
}

/* 模式选择菜单 */
.quiz-menu {
  padding: 4px 2px 8px;
}
.quiz-menu-title-main {
  font-size: 1.15rem;
  margin: 0 0 16px;
  text-align: center;
  color: var(--accent-dark);
}
.quiz-menu-group {
  margin-bottom: 18px;
}
.quiz-menu-sub {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  opacity: 0.75;
  margin-bottom: 8px;
}
.quiz-menu-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--card);
  border: 1px solid #e4dccb;
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 8px;
  font-size: 0.95rem;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
}
.quiz-menu-btn:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.quiz-menu-hint {
  font-size: 0.85rem;
  text-align: center;
  color: var(--text);
  opacity: 0.7;
  margin: 6px 0 0;
}
.quiz-menu-hint b {
  color: var(--accent-dark);
}

/* 拼写测验输入区 */
.quiz-spell {
  display: flex;
  gap: 8px;
  margin: 6px 0 4px;
}
.quiz-spell-input {
  flex: 1;
  font-size: 1.05rem;
  padding: 12px 14px;
  border: 2px solid var(--accent);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}
.quiz-spell-input:focus {
  border-color: var(--accent-dark);
}
.quiz-spell-input.correct { border-color: #2bb673; }
.quiz-spell-input.wrong { border-color: #e35d5d; }
.quiz-spell-submit {
  padding: 0 20px;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}
.quiz-spell-submit:disabled { opacity: 0.5; cursor: default; }

/* 阅读内挖空（中英模式） */
.cloze {
  display: inline;
  cursor: pointer;
  user-select: text;
  -webkit-user-select: text;
  border-bottom: 2px dashed var(--accent);
  color: var(--accent-dark);
  font-weight: 600;
  padding: 0 1px;
  border-radius: 4px;
  transition: background 0.15s;
}
.cloze:hover { background: var(--accent-light); }
.cloze-blank { letter-spacing: 2px; opacity: 0.65; }
.cloze-input {
  width: 7em;
  font-size: 0.95rem;
  padding: 1px 6px;
  border: 2px solid var(--accent);
  border-radius: 6px;
  background: var(--card);
  color: var(--text);
  outline: none;
}
.cloze-input.correct { border-color: #2bb673; }
.cloze-input.wrong { border-color: #e35d5d; }
.cloze-filled { color: var(--accent-dark); font-weight: 600; }
.cloze.done { border-bottom: none; cursor: default; }
.cloze.done:hover { background: none; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}
.shake { animation: shake 0.3s; }

/* ─── 顶部全局工具栏 ─── */
.top-toolbar {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 6px;
}
.top-tool-btn {
  background: var(--card);
  color: var(--accent-dark);
  border: 1px solid var(--accent-light);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background 0.15s, transform 0.1s;
}
.top-tool-btn:hover { background: var(--accent-light); }
.top-tool-btn:active { transform: scale(0.97); }

/* ─── 账号弹窗（登录 / 注册 / 已登录） ─── */
.account-card { max-width: 340px; }
.account-title { margin: 0 0 14px; font-size: 1.1rem; color: var(--text); }
.account-input {
  width: 100%; box-sizing: border-box; margin-bottom: 10px;
  padding: 10px 12px; border: 1px solid var(--accent-light);
  border-radius: 10px; background: var(--bg); color: var(--text);
  font-size: 0.95rem; outline: none;
}
.account-input:focus { border-color: var(--accent); }
.account-btns { display: flex; gap: 10px; margin-top: 4px; }
.account-btn {
  flex: 1; padding: 10px; border: none; border-radius: 10px;
  background: var(--accent-light); color: var(--accent-dark);
  font-size: 0.95rem; cursor: pointer; transition: background 0.15s, transform 0.1s;
}
.account-btn:hover { background: var(--accent); color: #fff; }
.account-btn:active { transform: scale(0.98); }
.account-btn.primary { background: var(--accent); color: #fff; }
.account-btn.primary:hover { background: var(--accent-dark); }
.account-msg { min-height: 18px; margin: 10px 0 0; font-size: 0.85rem; color: var(--muted); }
.account-msg.ok { color: #16a34a; }
.account-msg.err { color: #dc2626; }
.account-tip { margin: 12px 0 0; font-size: 0.78rem; color: var(--muted); line-height: 1.5; }
.account-welcome { font-size: 1rem; color: var(--text); margin: 0 0 6px; }

/* 阅读内「单词表」按钮 */
.story-header-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}
.wordlist-btn {
  flex-shrink: 0;
  background: var(--card);
  color: var(--accent-dark);
  border: 1px solid var(--accent);
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background 0.15s, transform 0.1s;
}
.wordlist-btn:hover { background: var(--accent-light); }
.wordlist-btn:active { transform: scale(0.97); }

/* 单词弹窗收藏按钮 */
.fav-btn {
  background: var(--card);
  color: var(--muted);
  border: 1px solid var(--accent-light);
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.fav-btn.active { color: #f5a623; border-color: #f5a623; background: #fff7e6; }

/* 首页续读横幅 */
.resume-banner {
  background: linear-gradient(135deg, var(--accent-light), var(--card));
  border: 1px solid var(--accent);
  color: var(--accent-dark);
  font-weight: 600;
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-bottom: 14px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.1s;
  animation: pop 0.2s ease-out;
}
.resume-banner:hover { transform: translateY(-1px); }

/* ─── 会员状态条 ─── */
.member-status {
  display: flex; align-items: center; gap: 10px;
  margin: 4px 2px 14px;
  flex-wrap: wrap;
}
.ms-badge {
  font-size: 14px; padding: 6px 12px; border-radius: 20px; font-weight: 600;
}
.ms-badge.free { background: #eef9f1; color: #2c8a55; border: 1px solid #bfe6cd; }
.ms-badge.member { background: linear-gradient(135deg, #fff3d6, #ffe2a8); color: #9a6b00; border: 1px solid #f0c969; }
.ms-unlock {
  font-size: 13px; padding: 6px 14px; border-radius: 20px; border: none; cursor: pointer;
  background: var(--accent); color: #fff; font-weight: 700;
}
.ms-unlock:hover { background: var(--accent-dark); }

/* ─── 付费墙浮层 ─── */
.paywall-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(40, 20, 30, 0.55); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; padding: 20px;
  animation: fadein 0.18s ease-out;
}
.paywall-box {
  position: relative; width: 100%; max-width: 380px;
  background: var(--card); border-radius: 18px; padding: 26px 22px 22px;
  box-shadow: 0 18px 50px rgba(0,0,0,0.25); text-align: center;
  max-height: 90vh; overflow-y: auto;
}
.paywall-close {
  position: absolute; top: 10px; right: 14px; border: none; background: transparent;
  font-size: 24px; line-height: 1; color: #999; cursor: pointer;
}
.paywall-emoji { font-size: 40px; }
.paywall-box h2 { margin: 6px 0 4px; font-size: 20px; color: var(--accent-dark); }
.paywall-sub { margin: 0 0 14px; font-size: 14px; color: #666; }
.paywall-sub b { color: var(--accent-dark); }
.paywall-plan {
  background: linear-gradient(135deg, var(--accent-light), #fff);
  border: 1px solid var(--accent); border-radius: 12px; padding: 12px; margin-bottom: 14px;
}
.plan-main { font-size: 14px; font-weight: 700; color: var(--accent-dark); }
.plan-price { font-size: 13px; color: #777; margin-top: 4px; }
.paywall-input-row { display: flex; gap: 8px; margin-bottom: 8px; }
.paywall-input-row input {
  flex: 1; padding: 10px 12px; border: 1.5px solid #ddd; border-radius: 10px;
  font-size: 14px; outline: none;
}
.paywall-input-row input:focus { border-color: var(--accent); }
.paywall-input-row button {
  padding: 10px 18px; border: none; border-radius: 10px; background: var(--accent);
  color: #fff; font-weight: 700; cursor: pointer;
}
.paywall-input-row button:hover { background: var(--accent-dark); }
.paywall-msg { font-size: 13px; min-height: 18px; margin-bottom: 8px; }
.paywall-msg.err { color: #d33; }
.paywall-msg.ok { color: #2c8a55; }
.paywall-msg.info { color: #2b7bbd; }
.paywall-wechat {
  border: 1px solid var(--accent); border-radius: 12px; background: #fff;
  padding: 12px; margin-bottom: 12px;
}
.pw-wechat-title { font-size: 13px; font-weight: 700; color: var(--accent-dark); margin-bottom: 8px; }
.pw-wechat-row {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: var(--accent-light); border-radius: 10px; padding: 10px 14px;
}
.pw-wechat-id {
  font-size: 18px; font-weight: 800; letter-spacing: 0.5px; color: var(--accent-dark);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  user-select: all;
}
.paywall-copy {
  padding: 6px 16px; border: none; border-radius: 8px; background: var(--accent);
  color: #fff; font-weight: 700; font-size: 13px; cursor: pointer;
}
.paywall-copy:hover { background: var(--accent-dark); }
.paywall-wechat-tip { font-size: 12px; color: #888; margin-top: 8px; }
.paywall-read {
  background: #f6f8fa; border-radius: 10px; padding: 10px 12px; margin-bottom: 12px;
  font-size: 13px; color: #555; text-align: left; line-height: 1.7;
}
.paywall-read-title { font-weight: 700; color: #333; margin-bottom: 2px; }
.paywall-back {
  width: 100%; padding: 9px; border: none; background: #eee; border-radius: 10px;
  color: #555; font-weight: 600; cursor: pointer;
}
.paywall-back:hover { background: #e2e2e2; }

/* ─── 面板弹窗（生词本 / 错题本 / 进度 / 单词表） ─── */
.panel-modal { z-index: 110; }
.panel-card {
  max-width: 460px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}
.panel-title {
  margin: 0 0 12px;
  font-size: 1.3rem;
  color: var(--accent-dark);
}
.panel-body {
  overflow-y: auto;
  flex: 1;
  padding-right: 4px;
}
.panel-foot {
  margin-top: 14px;
  display: flex;
  justify-content: flex-end;
}
.panel-empty {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
  text-align: center;
  padding: 14px 0;
}

/* 单词行 */
.word-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 4px;
  border-bottom: 1px solid var(--accent-light);
}
.row-main { flex: 1; min-width: 0; }
.row-en { font-weight: 700; color: var(--accent-dark); margin-right: 6px; }
.row-ipa { font-style: italic; color: var(--muted); font-size: 0.85rem; margin-right: 6px; }
.row-cn { color: var(--text); font-size: 0.92rem; }
.row-tag { display: block; font-size: 0.78rem; color: var(--muted); margin-top: 3px; }
.row-fav {
  flex-shrink: 0;
  background: none;
  border: none;
  font-size: 1.3rem;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
}
.row-fav.on { color: #f5a623; }
.row-del {
  flex-shrink: 0;
  background: none;
  border: none;
  font-size: 1.1rem;
  color: #e35d5d;
  cursor: pointer;
  line-height: 1;
}

/* 进度面板 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.stat-box {
  background: var(--accent-light);
  border-radius: 12px;
  padding: 12px 6px;
  text-align: center;
}
.stat-num { font-size: 1.4rem; font-weight: 800; color: var(--accent-dark); }
.stat-label { font-size: 0.78rem; color: var(--muted); margin-top: 2px; }
.progress-bar {
  height: 10px;
  background: var(--accent-light);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-dark));
  transition: width 0.4s ease;
}
.progress-note { font-size: 0.85rem; color: var(--text); margin: 8px 0 0; }
.progress-sub { font-size: 0.82rem; color: var(--muted); margin: 14px 0 6px; }
.day-row { display: flex; gap: 8px; }
.day-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-light);
}
.day-dot.on { background: var(--accent-dark); }

@media (max-width: 520px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .top-tool-btn { font-size: 0.8rem; padding: 6px 11px; }
}

/* ─── 左上角「设置」入口 ─── */
.settings-btn {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 150;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card);
  color: var(--accent-dark);
  border: 1px solid var(--accent-light);
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, background 0.15s ease;
}
.settings-btn:hover {
  background: var(--accent-light);
  transform: rotate(30deg);
}

.settings-card { max-width: 340px; }
.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 2px;
  border-top: 1px solid var(--accent-light);
  margin-top: 12px;
}
.settings-label { font-size: 1rem; color: var(--text); }
.settings-action {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 7px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease;
}
.settings-action:hover { background: var(--accent-dark); }
.settings-hint {
  margin: 8px 2px 0;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--muted);
}

.preview-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
  padding: 24px;
}

.phone-frame {
  position: relative;
  width: 414px;          /* 390 屏区 + 12px 黑边 ×2 */
  height: 868px;         /* 844 屏区 + 12px 黑边 ×2 */
  background: #0a0a0a;
  border-radius: 54px;
  padding: 12px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), 0 0 0 2px #2a2a2a;
  flex-shrink: 0;
}

.phone-island {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 28px;
  background: #000;
  border-radius: 999px;
  z-index: 5;
  pointer-events: none;
}

.phone-screen {
  display: block;
  width: 390px;
  height: 844px;
  border: none;
  border-radius: 44px;
  background: var(--card);
  overflow: hidden;
}

.preview-close {
  position: absolute;
  top: 14px;
  right: -52px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.85);
  color: #1a1a1a;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
  transition: transform 0.15s ease, background 0.15s ease;
}
.preview-close:hover {
  background: #fff;
  transform: scale(1.08);
}

@media (max-width: 900px) {
  .preview-overlay { padding: 12px; }
  .phone-frame { transform: scale(0.92); transform-origin: center; }
}
@media (max-height: 920px) {
  .phone-frame { transform: scale(0.85); transform-origin: center; }
}