/* ==================== 全局变量 ==================== */
:root {
  --bg-primary: #08090f;
  --bg-secondary: #0f1118;
  --bg-card: #14161f;
  --bg-card-elevated: #1a1d28;
  --bg-hover: #1e2130;
  --text-primary: #eef0f6;
  --text-secondary: #7e8599;
  --text-muted: #4e5468;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-hover: #7c7ff5;
  --accent-dim: rgba(99, 102, 241, 0.1);
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --accent-gradient-soft: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(168,85,247,0.15));
  --success: #10b981;
  --success-dim: rgba(16, 185, 129, 0.1);
  --danger: #ef4444;
  --danger-dim: rgba(239, 68, 68, 0.1);
  --warning: #f59e0b;
  --warning-dim: rgba(245, 158, 11, 0.1);
  --border: rgba(255, 255, 255, 0.05);
  --border-strong: rgba(255, 255, 255, 0.1);
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 32px rgba(99, 102, 241, 0.12);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.2), 0 4px 16px rgba(0,0,0,0.15);
  --font-main: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.12s ease;
  --transition-spring: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===== 亮色主题 ===== */
[data-theme="light"] {
  --bg-primary: #fafafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-elevated: #ffffff;
  --bg-hover: #f4f5f9;
  --text-primary: #1a1d2e;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-hover: #5856eb;
  --accent-dim: rgba(99, 102, 241, 0.06);
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --accent-gradient-soft: linear-gradient(135deg, rgba(99,102,241,0.05), rgba(168,85,247,0.05));
  --success: #10b981;
  --success-dim: rgba(16, 185, 129, 0.06);
  --danger: #ef4444;
  --danger-dim: rgba(239, 68, 68, 0.06);
  --warning: #f59e0b;
  --warning-dim: rgba(245, 158, 11, 0.06);
  --border: rgba(0, 0, 0, 0.05);
  --border-strong: rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.03);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.06);
  --shadow-glow: 0 0 32px rgba(99, 102, 241, 0.06);
  --shadow-card: 0 1px 2px rgba(0,0,0,0.03), 0 4px 12px rgba(0,0,0,0.03);
}

/* ==================== 基础重置 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

::selection { background: var(--accent-dim); color: var(--accent); }

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  background-image: 
    radial-gradient(ellipse 60% 40% at 50% 0%, rgba(99, 102, 241, 0.06), transparent 60%),
    radial-gradient(ellipse 50% 30% at 90% 90%, rgba(168, 85, 247, 0.04), transparent 60%);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11', 'ss01';
  letter-spacing: -0.01em;
}

[data-theme="light"] body {
  background-image: 
    radial-gradient(ellipse 60% 40% at 50% 0%, rgba(99, 102, 241, 0.04), transparent 60%),
    radial-gradient(ellipse 50% 30% at 90% 90%, rgba(168, 85, 247, 0.03), transparent 60%);
}

/* ==================== 导航栏 ==================== */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  height: 56px;
  background: rgba(15, 17, 24, 0.72);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
}

[data-theme="light"] .navbar {
  background: rgba(255, 255, 255, 0.72);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.navbar-brand .logo {
  font-size: 1.35rem;
}

.nav-tabs {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 5px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
}

[data-theme="light"] .nav-tabs {
  background: rgba(241, 243, 248, 0.7);
  backdrop-filter: blur(8px);
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px 6px 7px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 9px;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: var(--font-main);
  position: relative;
  white-space: nowrap;
  line-height: 1;
}

.nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  font-size: 0.95rem;
  line-height: 1;
  border-radius: 8px;
  background: var(--bg-card-elevated);
  border: 1px solid var(--border);
  transition: var(--transition-fast);
  flex-shrink: 0;
}

[data-theme="light"] .nav-icon {
  background: #ffffff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* 切换模式按钮 */
.nav-mode-switch {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px 6px 7px;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 9px;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: var(--font-main);
  white-space: nowrap;
  line-height: 1;
  margin-left: 2px;
}
.nav-mode-switch:hover {
  background: var(--bg-hover);
  color: var(--accent-light);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.nav-mode-switch:hover .nav-icon {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  transform: scale(1.06) rotate(-4deg);
}

/* 右侧操作组（模式切换 + 主题切换），始终可见 */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* 雅思模式：隐藏标准版导航标签，只保留雅思页自身的子导航 → 雅思成为独立页面 */
body[data-app-mode="ielts"] #nav-tabs-standard { display: none; }

/* 雅思模式下让雅思子导航吸顶，体验更像独立 App */
body[data-app-mode="ielts"] .ielts-tabs {
  position: sticky;
  top: 56px;
  z-index: 90;
}

.nav-tab .nav-label {
  letter-spacing: -0.01em;
}

.nav-tab:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.nav-tab:hover .nav-icon {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  transform: scale(1.06) rotate(-4deg);
}

.nav-tab.active {
  background: var(--accent-gradient);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}

.nav-tab.active .nav-icon {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.25);
  transform: scale(1.04);
}

.nav-tab:active {
  transform: translateY(0) scale(0.97);
}

.nav-divider {
  display: inline-block;
  width: 1px;
  height: 18px;
  background: var(--border-strong);
  margin: 0 4px;
  flex-shrink: 0;
}

/* ==================== 模式选择页（封面后） ==================== */
.mode-select {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 50% at 50% -10%, rgba(99, 102, 241, 0.18), transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 110%, rgba(168, 85, 247, 0.14), transparent 60%),
    var(--bg-primary);
  animation: modeSelectFade 0.45s cubic-bezier(0.4, 0, 0.2, 1) both;
}
@keyframes modeSelectFade {
  from { opacity: 0; transform: scale(1.02); }
  to   { opacity: 1; transform: scale(1); }
}
.mode-select.hide {
  animation: modeSelectOut 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
  pointer-events: none;
}
@keyframes modeSelectOut {
  from { opacity: 1; }
  to   { opacity: 0; transform: scale(0.98); }
}
.mode-select-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
  pointer-events: none;
}
.mode-select-orb-1 {
  width: 460px; height: 460px;
  background: radial-gradient(circle, rgba(99,102,241,0.55), transparent 70%);
  top: -160px; left: -120px;
  animation: orbFloat 14s ease-in-out infinite;
}
.mode-select-orb-2 {
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(168,85,247,0.5), transparent 70%);
  bottom: -180px; right: -100px;
  animation: orbFloat 18s ease-in-out infinite reverse;
}
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(30px, 26px); }
}
.mode-select-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 760px;
  text-align: center;
}
.mode-select-kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--accent-light);
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--bg-card);
  margin-bottom: 18px;
}
.mode-select-title {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  line-height: 1.15;
}
.mode-select-sub {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 34px;
  font-weight: 500;
}
.mode-select-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 28px;
}
.mode-select-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  text-align: left;
  padding: 26px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-main);
  position: relative;
  overflow: hidden;
}
.mode-select-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-gradient-soft);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}
.mode-select-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}
.mode-select-card:hover::after { opacity: 1; }
.msc-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  font-size: 1.7rem;
  border-radius: 16px;
  background: var(--accent-gradient-soft);
  border: 1px solid var(--border);
  z-index: 1;
}
.msc-body { z-index: 1; }
.msc-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.msc-desc {
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--text-secondary);
}
.msc-tag {
  z-index: 1;
  margin-top: auto;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent-light);
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--accent-dim);
  border: 1px solid transparent;
}
.mode-select-card[data-mode="ielts"] .msc-tag {
  color: #f0abfc;
  background: rgba(232, 121, 249, 0.12);
}
.mode-select-back {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 9px 20px;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: var(--font-main);
}
.mode-select-back:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* ==================== 主容器 ==================== */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.page {
  display: none;
  animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.page.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==================== 卡片 ==================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 20px;
}

/* ==================== 首页仪表盘 ==================== */
.hero {
  text-align: center;
  margin-bottom: 36px;
  padding: 16px 0;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.hero p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  font-weight: 500;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.stat-value {
  font-size: 1.9rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 4px;
  font-weight: 500;
}

/* 测试模式选择卡片 */
.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.mode-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.mode-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.mode-card::after {
  content: '';
  position: absolute;
  bottom: -60%;
  right: -30%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(99,102,241,0.15), transparent 70%);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}

.mode-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 48px rgba(99, 102, 241, 0.15);
}

.mode-card:hover::before {
  transform: scaleX(1);
}

.mode-card:hover::after {
  opacity: 1;
}

.mode-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
  display: inline-block;
  filter: drop-shadow(0 2px 12px rgba(99, 102, 241, 0.3));
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.mode-card:hover .mode-icon {
  transform: scale(1.1);
}

.mode-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.mode-desc {
  color: var(--text-secondary);
  font-size: 0.82rem;
  line-height: 1.55;
  position: relative;
  z-index: 1;
}

/* ==================== 测试配置 ==================== */
.config-group {
  margin-bottom: 24px;
}

.config-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.option-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.option-btn {
  padding: 10px 18px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition-fast);
  font-family: var(--font-main);
}

.option-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
  background: var(--bg-hover);
}

.option-btn.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent-light);
  font-weight: 600;
}

.option-btn:disabled,
.option-btn.disabled {
  opacity: 0.38;
  cursor: not-allowed;
  pointer-events: none;
  filter: grayscale(0.5);
}

/* ==================== 测试界面 ==================== */
.test-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

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

.progress-bar {
  width: 200px;
  height: 4px;
  background: var(--bg-secondary);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 2px;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.score-badge {
  display: flex;
  gap: 16px;
}

.score-item {
  text-align: center;
}

.score-num {
  font-size: 1.3rem;
  font-weight: 700;
}

.score-num.correct { color: var(--success); }
.score-num.wrong { color: var(--danger); }

.score-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* 题目卡片 */
.question-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 36px;
  text-align: center;
  margin-bottom: 20px;
  position: relative;
  box-shadow: var(--shadow-card);
}

.question-tag {
  display: inline-block;
  padding: 3px 12px;
  background: var(--accent-dim);
  color: var(--accent-light);
  border-radius: var(--radius-xs);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.question-word {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.question-phonetic {
  font-size: 1rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

.question-pos {
  display: inline-block;
  padding: 2px 10px;
  background: var(--bg-hover);
  border-radius: 6px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-style: italic;
}

.speak-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  transition: var(--transition);
  margin-left: 8px;
  vertical-align: middle;
}

.speak-btn:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
}

/* 选择题选项 */
.choices-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 28px;
}

.choice-btn {
  padding: 16px 20px;
  border: 2px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  transition: var(--transition);
  text-align: left;
  display: flex;
  align-items: center;
  gap: 10px;
}

.choice-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--bg-hover);
}

.choice-btn:disabled {
  cursor: default;
}

.choice-btn.correct {
  border-color: var(--success);
  background: var(--success-dim);
  color: var(--success);
}

.choice-btn.wrong {
  border-color: var(--danger);
  background: var(--danger-dim);
  color: var(--danger);
}

.choice-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-hover);
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.choice-btn.correct .choice-letter {
  background: var(--success);
  color: var(--bg-primary);
}

.choice-btn.wrong .choice-letter {
  background: var(--danger);
  color: var(--bg-primary);
}

/* 自评模式 */
.recall-input {
  width: 100%;
  padding: 16px 20px;
  border: 2px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  font-family: var(--font-main);
  outline: none;
  transition: var(--transition);
  margin-top: 20px;
}

.recall-input:focus {
  border-color: var(--accent);
}

.reveal-section {
  margin-top: 24px;
  display: none;
}

.reveal-section.show {
  display: block;
  animation: fadeIn 0.3s ease;
}

.reveal-answer {
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent);
  text-align: left;
  margin-bottom: 16px;
}

.reveal-answer strong {
  color: var(--accent);
}

.reveal-example {
  margin-top: 12px;
  padding: 12px 16px;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.reveal-example .cn {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 4px;
}

.self-grade-row {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.btn {
  padding: 11px 28px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  letter-spacing: -0.01em;
  font-family: var(--font-main);
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.25), 0 1px 2px rgba(0,0,0,0.1);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35), 0 2px 4px rgba(0,0,0,0.1);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-success {
  background: var(--success);
  color: var(--bg-primary);
}

.btn-success:hover {
  filter: brightness(1.1);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover {
  filter: brightness(1.1);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-lg {
  padding: 14px 40px;
  font-size: 1.05rem;
}

/* 反馈提示 */
.feedback-bar {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  text-align: center;
  font-weight: 600;
  margin-bottom: 16px;
  display: none;
  animation: fadeIn 0.3s ease;
}

.feedback-bar.show { display: block; }
.feedback-bar.correct { background: var(--success-dim); color: var(--success); }
.feedback-bar.wrong { background: var(--danger-dim); color: var(--danger); }

/* ==================== 测试结果 ==================== */
.result-card {
  text-align: center;
  padding: 44px;
  position: relative;
  overflow: hidden;
}

.result-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.result-score {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 6px;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.result-score.excellent { 
  background: linear-gradient(135deg, #10b981, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.result-score.good { 
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.result-score.fair { color: var(--warning); }
.result-score.poor { color: var(--danger); }
.result-score.needs-work { color: var(--danger); }

.result-msg {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.result-sub {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}
.result-sub b { color: var(--accent-light); }

.result-breakdown {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 32px;
}

.result-stat {
  text-align: center;
}

.result-stat-num {
  font-size: 1.8rem;
  font-weight: 700;
}

.result-stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 错词复习列表 */
.review-list {
  text-align: left;
  margin-top: 24px;
}

.review-list h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.review-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.review-item .word { font-weight: 600; }
.review-item .meaning { color: var(--text-secondary); }

.result-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 28px;
}

/* ==================== 词典页面 ==================== */
.dict-search-wrapper {
  position: relative;
  margin-bottom: 24px;
}

.dict-search-box {
  width: 100%;
  padding: 16px 90px 16px 52px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  border-radius: var(--radius);
  font-size: 1.1rem;
  outline: none;
  transition: var(--transition);
}

.dict-search-box:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.dict-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  color: var(--text-muted);
}

.dict-result {
  display: none;
}

.dict-result.show {
  display: block;
  animation: fadeIn 0.3s ease;
}

.dict-entry {
  margin-bottom: 20px;
}

.dict-word-header {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.dict-word {
  font-size: 2rem;
  font-weight: 700;
}

.dict-phonetic {
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.dict-pos-tag {
  padding: 3px 12px;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  font-style: italic;
}

.dict-meaning {
  padding: 16px 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.dict-example {
  padding: 14px 18px;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent);
}

.dict-example .en {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.dict-example .cn {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.dict-loading {
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
}

.dict-error {
  text-align: center;
  padding: 40px;
  color: var(--danger);
}

.dict-suggestions {
  margin-top: 16px;
}

.dict-suggestion-item {
  padding: 10px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  margin-bottom: 6px;
  transition: var(--transition);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dict-suggestion-item:hover {
  background: var(--bg-hover);
}

.dict-suggestion-item .word {
  font-weight: 600;
}

.dict-suggestion-item .meaning {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 词典快捷词表 */
.quick-words {
  margin-top: 32px;
}

.quick-words-title {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.quick-words-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.quick-word-chip {
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.quick-word-chip:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

/* ==================== 统计页面 ==================== */
.stats-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.overview-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.overview-icon {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.overview-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

.overview-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* 掌握度进度条 */
.mastery-section {
  margin-bottom: 32px;
}

.mastery-bar {
  display: flex;
  height: 32px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 8px;
}

.mastery-segment {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 600;
  color: white;
  transition: var(--transition);
}

.mastery-segment.mastered { background: var(--success); }
.mastery-segment.learning { background: var(--warning); }
.mastery-segment.new { background: var(--text-muted); }

.mastery-legend {
  display: flex;
  gap: 20px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}

/* 最近测试记录 */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

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

.history-mode {
  font-size: 0.82rem;
  padding: 3px 10px;
  background: var(--bg-hover);
  border-radius: 6px;
  color: var(--text-secondary);
}

.history-date {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.history-score {
  font-size: 1.1rem;
  font-weight: 700;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state .icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

/* ==================== 词汇选择面板 ==================== */
.word-picker {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-secondary);
}

.word-picker-toolbar {
  display: flex;
  gap: 10px;
  padding: 12px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.word-picker-search {
  flex: 1;
  padding: 10px 16px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

.word-picker-search:focus {
  border-color: var(--accent);
}

.word-picker-filter {
  padding: 10px 16px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  cursor: pointer;
  outline: none;
}

.word-picker-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.82rem;
  border-radius: 6px;
}

.word-picker-count {
  margin-left: auto;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
}

.word-picker-list {
  max-height: 400px;
  overflow-y: auto;
  padding: 8px;
}

.word-picker-list::-webkit-scrollbar {
  width: 6px;
}

.word-picker-list::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

.word-picker-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.word-picker-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s ease;
  font-size: 0.9rem;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
}

.word-picker-item:hover {
  background: var(--bg-hover);
}

.word-picker-item.selected {
  background: var(--accent-dim);
}

.word-picker-checkbox {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}

.word-picker-item.selected .word-picker-checkbox {
  background: var(--accent);
  border-color: var(--accent);
}

.word-picker-checkbox::after {
  content: '✓';
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  opacity: 0;
  transition: var(--transition);
}

.word-picker-item.selected .word-picker-checkbox::after {
  opacity: 1;
}

.word-picker-item .wp-word {
  font-weight: 600;
  min-width: 120px;
}

.word-picker-item .wp-phonetic {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  min-width: 100px;
}

.word-picker-item .wp-meaning {
  color: var(--text-secondary);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.word-picker-item .wp-level {
  font-size: 0.72rem;
  padding: 1px 6px;
  border-radius: 4px;
  flex-shrink: 0;
}

.wp-level-1 { background: rgba(74, 222, 128, 0.15); color: var(--success); }
.wp-level-2 { background: rgba(251, 191, 36, 0.15); color: var(--warning); }
.wp-level-3 { background: rgba(248, 113, 113, 0.15); color: var(--danger); }

.word-picker-empty {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ==================== 试卷模块 ==================== */

/* 试卷卡片列表 */
.exam-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.exam-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.exam-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.exam-card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.exam-card-subtitle {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.exam-card-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.exam-tag {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.exam-tag-type {
  background: rgba(99,102,241,0.15);
  color: #818cf8;
}

.exam-tag-grade {
  background: rgba(34,197,94,0.15);
  color: #4ade80;
}

.exam-tag-year {
  background: rgba(251,146,60,0.15);
  color: #fbbf24;
}

.exam-card-footer {
  display: flex;
  gap: 20px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.exam-card-footer span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.exam-card-action {
  position: absolute;
  right: 24px;
  bottom: 20px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.88rem;
}

/* 考试界面 */
.exam-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-primary);
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.exam-info-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.exam-title-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.exam-timer {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--warning);
  font-variant-numeric: tabular-nums;
  background: rgba(251,146,60,0.1);
  padding: 4px 14px;
  border-radius: var(--radius-sm);
}

.exam-timer.warning {
  color: var(--danger);
  background: rgba(239,68,68,0.1);
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.exam-progress-text {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* 试卷题目 */
.exam-section {
  margin-bottom: 32px;
}

.exam-section-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 4px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.exam-section-instruction {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-style: italic;
}

.exam-passage {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-secondary);
  white-space: pre-wrap;
  border-left: 3px solid var(--accent);
}

.exam-question {
  margin-bottom: 20px;
  padding: 16px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.exam-question-number {
  font-weight: 700;
  color: var(--accent);
  margin-right: 8px;
}

.exam-question-text {
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.exam-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.exam-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-secondary);
}

.exam-option:hover {
  border-color: var(--accent);
  background: rgba(99,102,241,0.05);
}

.exam-option.selected {
  border-color: var(--accent);
  background: rgba(99,102,241,0.1);
  color: var(--text-primary);
}

.exam-option-label {
  font-weight: 700;
  color: var(--accent);
  min-width: 20px;
}

.exam-option.correct {
  border-color: var(--success);
  background: rgba(34,197,94,0.1);
}

.exam-option.correct .exam-option-label {
  color: var(--success);
}

.exam-option.wrong {
  border-color: var(--danger);
  background: rgba(239,68,68,0.1);
}

.exam-option.wrong .exam-option-label {
  color: var(--danger);
}

.exam-question-explanation {
  margin-top: 10px;
  padding: 14px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-secondary);
  border-left: 3px solid var(--warning);
  line-height: 1.8;
  white-space: pre-wrap;
}

.exam-question-explanation strong {
  color: var(--accent);
}

/* 试卷分析报告 */
.exam-analysis {
  margin: 24px 0;
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  text-align: left;
}

.exam-analysis-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.exam-analysis-section {
  margin-bottom: 14px;
}

.exam-analysis-section h4 {
  font-size: 0.88rem;
  color: var(--accent);
  margin-bottom: 6px;
}

.exam-analysis-section p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.exam-skill-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.exam-skill-name {
  font-size: 0.82rem;
  color: var(--text-secondary);
  min-width: 100px;
}

.exam-skill-track {
  flex: 1;
  height: 8px;
  background: var(--bg-primary);
  border-radius: 4px;
  overflow: hidden;
}

.exam-skill-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease;
}

.exam-skill-pct {
  font-size: 0.82rem;
  font-weight: 600;
  min-width: 40px;
  text-align: right;
}

/* 试卷回顾列表 */
.exam-review-list {
  margin: 20px 0;
  text-align: left;
}

.exam-review-item {
  padding: 14px;
  margin-bottom: 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.exam-review-item.correct {
  border-left: 3px solid var(--success);
}

.exam-review-item.wrong {
  border-left: 3px solid var(--danger);
}

.exam-review-q {
  font-size: 0.88rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.exam-review-ans {
  font-size: 0.82rem;
  color: var(--text-secondary);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.exam-review-ans .correct-ans {
  color: var(--success);
  font-weight: 600;
}

.exam-review-ans .wrong-ans {
  color: var(--danger);
  font-weight: 600;
}

/* 时间选择弹窗 */
.exam-time-picker {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.exam-time-picker-content {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 32px;
  max-width: 420px;
  width: 90%;
  border: 1px solid var(--border);
}

.exam-time-picker-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.exam-time-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.exam-time-btn {
  padding: 14px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
}

.exam-time-btn:hover, .exam-time-btn.active {
  border-color: var(--accent);
  background: rgba(99,102,241,0.15);
  color: var(--accent);
}

.exam-time-custom {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.exam-time-custom input {
  width: 60px;
  padding: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  text-align: center;
}

.exam-time-picker-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* ==================== 主题切换按钮 ==================== */
.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--border-strong);
  background: var(--bg-hover);
}

/* ==================== 错题本 ==================== */
.wrong-book-toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.wrong-book-stats {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

.wrong-stat-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.wrong-stat-num {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--danger);
}

.wrong-stat-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.wrong-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  border-left: 3px solid var(--danger);
}

.wrong-item.mastered {
  border-left-color: var(--success);
  opacity: 0.7;
}

.wrong-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.wrong-item-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.wrong-kp-tag {
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.72rem;
  background: var(--accent-dim);
  color: var(--accent);
}

.wrong-source-tag {
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.72rem;
  background: var(--bg-hover);
  color: var(--text-secondary);
}

.wrong-item-question {
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.6;
}

.wrong-item-answers {
  display: flex;
  gap: 16px;
  font-size: 0.82rem;
  margin-bottom: 8px;
}

.wrong-item-answers .your-ans {
  color: var(--danger);
}

.wrong-item-answers .correct-ans {
  color: var(--success);
  font-weight: 600;
}

.wrong-item-actions {
  display: flex;
  gap: 8px;
}

.wrong-item-actions button {
  padding: 4px 12px;
  font-size: 0.78rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.wrong-item-actions button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ==================== 每日目标 ==================== */
.daily-goals {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
}

.daily-goals-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.daily-goals-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.daily-goals-date {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.daily-goals-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.daily-goal-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.daily-goal-item.done {
  border-color: var(--success);
  background: var(--success-dim);
}

.daily-goal-checkbox {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.daily-goal-item.done .daily-goal-checkbox {
  border-color: var(--success);
  background: var(--success);
}

.daily-goal-checkbox::after {
  content: '✓';
  color: white;
  font-size: 0.8rem;
  display: none;
}

.daily-goal-item.done .daily-goal-checkbox::after {
  display: block;
}

.daily-goal-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.daily-goal-item.done .daily-goal-text {
  color: var(--text-primary);
  text-decoration: line-through;
}

.daily-goal-progress {
  font-size: 0.78rem;
  color: var(--accent-light);
  font-weight: 600;
  margin-left: auto;
}

/* 自定义文字目标 */
.custom-goal-item {
  cursor: pointer;
}

.custom-goal-item .daily-goal-text {
  flex: 1;
  cursor: pointer;
  user-select: none;
}

.custom-goal-delete {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  transition: var(--transition-fast);
  opacity: 0;
}

.custom-goal-item:hover .custom-goal-delete {
  opacity: 1;
}

.custom-goal-delete:hover {
  color: var(--danger);
}

/* ==================== 收藏按钮 ==================== */
.fav-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--text-muted);
  transition: var(--transition);
  padding: 4px 8px;
}

.fav-btn:hover {
  transform: scale(1.2);
}

.fav-btn.active {
  color: var(--warning);
}

/* ==================== 键盘提示 ==================== */
.keyboard-hint {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  color: var(--text-muted);
  padding: 2px 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  border: 1px solid var(--border);
}

.kbd {
  display: inline-block;
  padding: 1px 6px;
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-primary);
  min-width: 18px;
  text-align: center;
}

/* ==================== 即时反馈开关 ==================== */
.instant-feedback-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  cursor: pointer;
}

.toggle-switch {
  width: 40px;
  height: 22px;
  background: var(--bg-hover);
  border-radius: 11px;
  position: relative;
  transition: var(--transition);
  flex-shrink: 0;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background: var(--text-secondary);
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: var(--transition);
}

.instant-feedback-toggle.active .toggle-switch {
  background: var(--accent);
}

.instant-feedback-toggle.active .toggle-switch::after {
  left: 20px;
  background: white;
}

/* ==================== 试卷进度保存提示 ==================== */
.exam-resume-banner {
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.exam-resume-info {
  font-size: 0.85rem;
  color: var(--text-primary);
}

.exam-resume-actions {
  display: flex;
  gap: 8px;
}

.word-picker-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  margin-top: 8px;
  flex-wrap: wrap;
}

.word-picker-pagination .page-info {
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-align: center;
}

.word-picker-pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ==================== 学习打卡日历 ==================== */
.study-calendar-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card);
}

.study-calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.study-calendar-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.study-streak {
  font-size: 0.85rem;
  color: var(--warning);
  font-weight: 600;
  margin-left: 12px;
}

.study-best {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-left: 8px;
}

.study-total {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.heatmap-container { overflow-x: auto; padding-bottom: 4px; }

.heatmap-months {
  display: grid;
  grid-template-columns: repeat(12, 14px);
  gap: 2px;
  margin-left: 22px;
  margin-bottom: 4px;
  font-size: 0.68rem;
  color: var(--text-muted);
}

.heatmap-weekdays {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.62rem;
  color: var(--text-muted);
  justify-content: space-between;
  padding: 1px 4px 1px 0;
}

.heatmap-grid {
  display: flex;
  gap: 2px;
}

.heatmap-week {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.heatmap-cell {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
}

.heatmap-cell.level-1 { background: rgba(99,102,241,0.25); border-color: transparent; }
.heatmap-cell.level-2 { background: rgba(99,102,241,0.5); border-color: transparent; }
.heatmap-cell.level-3 { background: rgba(99,102,241,0.75); border-color: transparent; }
.heatmap-cell.level-4 { background: var(--accent); border-color: transparent; }
.heatmap-cell.future { opacity: 0.3; }

.heatmap-legend {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  margin-left: 22px;
}

/* ==================== 语法专题 ==================== */
.grammar-topic-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.grammar-topic-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.grammar-topic-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.grammar-topic-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.grammar-topic-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.grammar-topic-badge {
  padding: 3px 10px;
  border-radius: var(--radius-xs);
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--accent-dim);
  color: var(--accent-light);
}

/* 语法专题工具条（搜索 + 进度） */
.grammar-tools {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.grammar-search-wrap {
  position: relative;
  flex: 1;
  min-width: 220px;
}
.grammar-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.9rem;
  opacity: 0.6;
  pointer-events: none;
}
.grammar-search {
  width: 100%;
  padding: 11px 14px 11px 38px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--font-main);
  transition: var(--transition);
}
.grammar-search:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.grammar-progress {
  font-size: 0.85rem;
  color: var(--text-secondary);
  white-space: nowrap;
}
.grammar-progress b { color: var(--accent-light); }

/* 学习进度标记 */
.grammar-topic-card { position: relative; }
.grammar-topic-card.learned {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-dim), var(--bg-card) 60%);
}
.grammar-topic-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}
.grammar-learned-badge {
  padding: 3px 9px;
  border-radius: var(--radius-xs);
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(99,102,241,0.4);
}
.grammar-learn-btn {
  margin-top: 0;
  padding: 8px 16px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-main);
  cursor: pointer;
  transition: var(--transition);
}
.grammar-learn-btn:hover {
  border-color: var(--accent);
  color: var(--accent-light);
}
.grammar-learn-btn.on {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent-light);
}
.grammar-topic-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
  align-items: center;
}
/* 列表卡片：进入互动讲解按钮（暖橙，对齐主页火宝宝） */
.grammar-interactive-btn {
  margin-top: 0;
  padding: 8px 16px;
  border: 1px solid var(--huo-color, #ff8a00);
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(255,138,0,.14), rgba(255,94,58,.08));
  color: var(--huo-color, #ff8a00);
  font-size: 0.82rem;
  font-weight: 700;
  font-family: var(--font-main);
  cursor: pointer;
  transition: var(--transition);
}
.grammar-interactive-btn:hover {
  background: linear-gradient(135deg, rgba(255,138,0,.26), rgba(255,94,58,.16));
  box-shadow: 0 6px 18px -8px var(--huo-color, #ff8a00);
  transform: translateY(-1px);
}
.empty-hint {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 16px;
  font-size: 0.92rem;
}

.grammar-detail {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.grammar-section-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-light);
  margin: 20px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.grammar-section-title:first-child { margin-top: 0; }

.grammar-content {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.8;
  white-space: pre-wrap;
}

.grammar-example {
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-xs);
  padding: 12px 16px;
  margin: 8px 0;
  font-size: 0.85rem;
  line-height: 1.7;
}

.grammar-example strong { color: var(--text-primary); }

/* 详情页：火宝宝互动讲解入口横幅（视频保留，新增互动页跳转） */
.grammar-interactive-banner {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 22px 0 4px;
  padding: 16px 18px;
  background: linear-gradient(135deg, rgba(255,138,0,.10), rgba(255,94,58,.05));
  border: 1px solid var(--huo-color, #ff8a00);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
}
.grammar-interactive-banner:hover {
  box-shadow: 0 10px 28px -12px var(--huo-color, #ff8a00);
  transform: translateY(-2px);
}
.grammar-interactive-banner .gi-fire {
  font-size: 1.8rem;
  filter: drop-shadow(0 0 10px var(--huo-color, #ff8a00));
  animation: giFloat 2.6s ease-in-out infinite;
}
@keyframes giFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-4px); } }
.grammar-interactive-banner .gi-body { flex: 1; min-width: 0; }
.grammar-interactive-banner .gi-title { font-weight: 800; font-size: 1rem; color: var(--text-primary); }
.grammar-interactive-banner .gi-sub { font-size: 0.8rem; color: var(--text-muted); margin-top: 3px; }
.grammar-interactive-banner .gi-go {
  font-weight: 800; font-size: 0.9rem; color: #fff;
  background: linear-gradient(135deg, var(--huo-color, #ff8a00), #ff5e3a);
  padding: 8px 16px; border-radius: 999px; white-space: nowrap;
}
.grammar-video-section {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
}

.grammar-video-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 6px 0 16px;
}

.grammar-video-item {
  margin-bottom: 18px;
}

.grammar-video-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 8px;
}

.grammar-video {
  width: 100%;
  max-height: 420px;
  border-radius: var(--radius-sm);
  background: #000;
  box-shadow: var(--shadow-card);
  outline: none;
}

/* 视频加载失败兜底提示 */
.video-fallback {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 220px;
  padding: 28px 20px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px dashed var(--border);
  text-align: center;
  box-sizing: border-box;
}
.video-fallback-icon { font-size: 2.2rem; }
.video-fallback-title { font-size: 1rem; font-weight: 700; color: var(--text); }
.video-fallback-sub { font-size: 0.82rem; color: var(--text-secondary); max-width: 420px; line-height: 1.5; }

.video-retry {
  margin-left: auto;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}
.video-retry:hover { border-color: var(--accent); color: var(--accent-light); }

/* 视频工具条：倍速 + 下载 */
.video-wrap { position: relative; }
.video-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  flex-wrap: wrap;
}
.video-speed {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 600;
}
.video-speed select {
  padding: 5px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xs);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-family: var(--font-main);
  cursor: pointer;
}
.video-speed select:focus { outline: none; border-color: var(--accent); }
.video-dl {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 999px;
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(99,102,241,0.35);
  transition: var(--transition);
}
.video-dl:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(99,102,241,0.5); }

/* ==================== 听力练习 ==================== */
.listening-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  margin-bottom: 8px;
  background: var(--bg-card);
}

.listening-option:hover {
  border-color: var(--border-strong);
  background: var(--bg-hover);
}

.listening-option.selected {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.listening-option.correct {
  border-color: var(--success);
  background: var(--success-dim);
}

.listening-option.wrong {
  border-color: var(--danger);
  background: var(--danger-dim);
}

.listening-option-label {
  font-weight: 700;
  color: var(--accent-light);
  min-width: 20px;
  font-size: 0.9rem;
}

/* 听力：声波可视化 */
.listening-viz {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 5px;
  height: 48px;
  margin: 2px 0 10px;
}
.listening-viz span {
  width: 6px;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--accent), #a855f7);
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.4);
  transition: height 0.15s ease;
}
.listening-viz.playing span {
  animation: eqBounce 0.9s ease-in-out infinite;
}
.listening-viz.playing span:nth-child(1) { animation-delay: 0s; }
.listening-viz.playing span:nth-child(2) { animation-delay: 0.12s; }
.listening-viz.playing span:nth-child(3) { animation-delay: 0.24s; }
.listening-viz.playing span:nth-child(4) { animation-delay: 0.36s; }
.listening-viz.playing span:nth-child(5) { animation-delay: 0.48s; }
@keyframes eqBounce {
  0%, 100% { height: 8px; }
  50% { height: 46px; }
}

/* 听力：提示与播放行 */
.listening-hint {
  font-size: 0.86rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}
.listening-play-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 18px;
}
.listening-speed-inline {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
}
.lsi-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-right: 2px;
}
.lsi-label + .option-btn,
.listening-speed-inline .option-btn {
  padding: 4px 9px;
  font-size: 0.76rem;
  border-radius: var(--radius-xs);
}

/* 听力：拼写框 */
.spell-box {
  display: flex;
  gap: 10px;
  margin: 6px 0 4px;
}
.spell-input {
  flex: 1;
  padding: 12px 16px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input, #fff);
  color: var(--text-primary);
  outline: none;
  transition: var(--transition-fast);
}
.spell-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

/* 听力：复盘卡片 */
.listening-reveal-wrap { margin-top: 16px; }
.reveal-card {
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  animation: revealIn 0.35s ease both;
}
.reveal-card.ok { border-color: var(--success); background: var(--success-dim); }
.reveal-card.no { border-color: var(--danger); background: var(--danger-dim); }
@keyframes revealIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.reveal-word {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.reveal-word .rp {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  margin: 0 6px;
}
.reveal-word .pos {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-light);
  background: var(--accent-dim);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}
.reveal-ex {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-top: 10px;
  line-height: 1.5;
}
.reveal-ex b { color: var(--accent-light); background: var(--accent-dim); padding: 0 4px; border-radius: 4px; }
.reveal-excn {
  font-size: 0.86rem;
  color: var(--text-secondary);
  margin-top: 4px;
}
.reveal-card .btn-sm { margin-top: 10px; }
.reveal-result {
  margin-top: 12px;
  font-weight: 600;
  font-size: 0.95rem;
}

/* 听力：底部按钮与最佳成绩 */
.listening-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
}
.listening-best {
  margin: 14px 0 4px;
  font-size: 0.84rem;
  color: var(--text-secondary);
  text-align: center;
  padding: 10px 14px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-subtle, rgba(255,255,255,0.4));
}
.listening-best b { color: var(--accent-light); }

/* ==================== 火宝宝 · 连续打卡奖励 ==================== */
#huobao-card { margin-bottom: 22px; }
.huobao-card {
  display: flex;
  gap: 24px;
  align-items: center;
  padding: 22px 26px;
  background: linear-gradient(135deg, rgba(255, 154, 60, 0.08), rgba(255, 94, 58, 0.03));
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: visible;
}
[data-theme="light"] .huobao-card {
  background: linear-gradient(135deg, #fff7ed, #ffffff);
  border-color: #ffe2c2;
}
.hb-left { flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.hb-mascot { transition: transform .35s ease; animation: hbFloat 3s ease-in-out infinite; cursor: pointer; user-select: none; -webkit-tap-highlight-color: transparent; }
@keyframes hbFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
.hb-flame-wrap { position: relative; width: 200px; height: 220px; display: flex; align-items: center; justify-content: center; }
.hb-img { max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; filter: drop-shadow(0 0 14px var(--huo-color)); pointer-events: none; }

/* 等级越高火焰越亮 */
.hb-lv-3 .hb-img, .hb-lv-4 .hb-img { filter: drop-shadow(0 0 18px var(--huo-color)); }
.hb-lv-5 .hb-img, .hb-lv-6 .hb-img { filter: drop-shadow(0 0 22px var(--huo-color)); }
.hb-lv-7 .hb-img { filter: drop-shadow(0 0 26px #ffd700) drop-shadow(0 0 8px var(--huo-color)); }

/* Lv.7 神级金色光环 */
.hb-mascot.hb-god-aura { position: relative; }
.hb-mascot.hb-god-aura::before {
  content: ''; position: absolute; left: 50%; bottom: -18px; transform: translateX(-50%);
  width: 220px; height: 40px; border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(255,215,0,0.95) 0%, rgba(255,174,0,0.6) 35%, rgba(255,140,0,0.15) 65%, transparent 100%);
  filter: blur(2px);
  animation: hbGodAura 2.4s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}
.hb-mascot.hb-god-aura::after {
  content: ''; position: absolute; left: 50%; bottom: -22px; transform: translateX(-50%);
  width: 200px; height: 20px; border-radius: 50%;
  border: 2px solid rgba(255,215,0,0.85);
  box-shadow: 0 0 14px rgba(255,215,0,0.9), inset 0 0 8px rgba(255,235,150,0.7);
  animation: hbGodRing 3.2s linear infinite;
  pointer-events: none; z-index: -1;
}
@keyframes hbGodAura {
  0%, 100% { opacity: 0.85; transform: translateX(-50%) scale(1); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.06); }
}
@keyframes hbGodRing {
  0% { transform: translateX(-50%) scale(1) rotate(0); opacity: 0.9; }
  50% { opacity: 1; }
  100% { transform: translateX(-50%) scale(1.15) rotate(0); opacity: 0.6; }
}
.hb-level-tag {
  position: absolute; bottom: -4px; left: 50%; transform: translateX(-50%);
  background: var(--huo-color); color: #fff; font-size: 0.72rem; font-weight: 800;
  padding: 2px 11px; border-radius: 999px; white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
}
.hb-right { flex: 1; min-width: 0; }
.hb-top { display: flex; align-items: baseline; gap: 10px; margin-bottom: 10px; }
.hb-title { font-size: 1.15rem; font-weight: 800; color: var(--text-primary); }
.hb-lvname { font-size: 0.95rem; font-weight: 700; }
.hb-stats { display: flex; gap: 24px; margin-bottom: 14px; }
.hb-stat { display: flex; flex-direction: column; }
.hb-num { font-size: 1.5rem; font-weight: 800; color: var(--text-primary); line-height: 1; }
.hb-lbl { font-size: 0.72rem; color: var(--text-muted); margin-top: 4px; }
.hb-progress-wrap { margin-bottom: 14px; }
.hb-progress-label { font-size: 0.78rem; color: var(--text-secondary); margin-bottom: 6px; }
.hb-progress { height: 9px; background: var(--bg-secondary); border-radius: 999px; overflow: hidden; }
.hb-progress-fill { height: 100%; border-radius: 999px; transition: width .5s ease; }
.hb-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.hb-checkin {
  border: none; cursor: pointer; padding: 10px 22px; border-radius: 999px;
  background: linear-gradient(135deg, #ff9a3c, #ff5e3a); color: #fff;
  font-weight: 800; font-size: 0.95rem; font-family: var(--font-main);
  box-shadow: 0 4px 14px rgba(255, 94, 58, 0.4); transition: var(--transition-fast);
}
.hb-checkin:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(255, 94, 58, 0.5); }
.hb-checkin:active { transform: translateY(0) scale(.97); }
.hb-checkin.done { background: var(--bg-secondary); color: var(--text-muted); box-shadow: none; cursor: default; }
.hb-hint { font-size: 0.8rem; color: var(--text-muted); }
.hb-hint.warn { color: #f59e0b; font-weight: 700; }
.hb-hint.ok { color: var(--accent-light); font-weight: 600; }
.hb-badges-title { font-size: 0.82rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 8px; }
.hb-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.hb-badge {
  width: 80px; padding: 10px 6px; border-radius: 12px; text-align: center;
  background: var(--bg-secondary); border: 1px solid var(--border); opacity: 0.5;
  transition: var(--transition-fast);
}
.hb-badge.reached { opacity: 1; border-color: var(--bc); box-shadow: 0 0 12px -2px var(--bc); }
.hb-badge-icon { font-size: 1.4rem; }
.hb-badge-name { font-size: 0.72rem; font-weight: 700; color: var(--text-primary); margin-top: 3px; }
.hb-badge-sub { font-size: 0.62rem; color: var(--text-muted); margin-top: 2px; }
.hb-toast {
  position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%) translateY(20px);
  background: rgba(20, 20, 28, 0.92); color: #fff; padding: 12px 20px; border-radius: 12px;
  font-size: 0.9rem; font-weight: 600; z-index: 9999; opacity: 0; pointer-events: none;
  transition: all .3s ease; border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px); max-width: 90vw; text-align: center;
}
.hb-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 火宝宝互动（图片素材） ---------- */
.hb-mascot.wave .hb-img { animation: hbWiggle .42s ease 3; }
.hb-mascot.jump .hb-img { animation: hbJump .5s ease 2; }
.hb-mascot.spin .hb-img { animation: hbSpin .7s ease 1; }
.hb-mascot.blink .hb-img { animation: hbSquash .45s ease 2; }

@keyframes hbWiggle { 0%, 100% { transform: rotate(0) translateX(0); } 25% { transform: rotate(-9deg) translateX(-3px); } 75% { transform: rotate(9deg) translateX(3px); } }
@keyframes hbJump { 0%, 100% { transform: translateY(0); } 25% { transform: translateY(-20px); } 50% { transform: translateY(0); } 75% { transform: translateY(-10px); } }
@keyframes hbSpin { 0% { transform: rotate(0); } 100% { transform: rotate(360deg); } }
@keyframes hbSquash { 0%, 100% { transform: scaleY(1) scaleX(1); } 50% { transform: scaleY(.92) scaleX(1.08); } }

.hb-poke-tip { text-align: center; font-size: .72rem; color: var(--text-muted); margin-top: 10px; }

.hb-speech {
  position: absolute; top: 4px; left: 50%;
  transform: translateX(-50%) translateY(-100%) scale(.8);
  background: #fff; color: #ff5e3a; font-weight: 800; font-size: .82rem;
  padding: 7px 13px; border-radius: 14px; white-space: nowrap;
  box-shadow: 0 6px 18px rgba(0, 0, 0, .16); opacity: 0; pointer-events: none;
  border: 2px solid var(--huo-color); z-index: 6;
  transition: opacity .25s ease, transform .25s cubic-bezier(.34, 1.56, .64, 1);
}
.hb-speech.show { opacity: 1; transform: translateX(-50%) translateY(-135%) scale(1); }
.hb-speech::after {
  content: ''; position: absolute; bottom: -9px; left: 50%; transform: translateX(-50%);
  border: 9px solid transparent; border-top-color: #fff;
}
.hb-heart {
  position: absolute; left: 50%; top: 14px; font-size: 1.15rem; pointer-events: none; z-index: 5;
  animation: hbHeartUp 1.25s ease-out forwards;
}
@keyframes hbHeartUp {
  0% { opacity: 0; transform: translate(-50%, 0) scale(.5); }
  20% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -64px) scale(1.25); }
}

/* ---------- 段位称号 / 徽章可点击 ---------- */
.hb-title-badge {
  font-size: .7rem; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, var(--huo-color), #ff8a00);
  padding: 2px 9px; border-radius: 999px; white-space: nowrap;
  box-shadow: 0 2px 8px -2px var(--huo-color);
}
.hb-badge { cursor: pointer; transition: transform .18s ease, box-shadow .18s ease; }
.hb-badge:hover { transform: translateY(-3px) scale(1.04); }
.hb-badge:active { transform: scale(.97); }

/* ---------- 顶栏常驻小火苗 ---------- */
.nav-streak-flame {
  display: inline-flex; align-items: center; gap: 3px;
  padding: 5px 9px 5px 6px; border: 1px solid var(--border);
  background: var(--bg-card-elevated); border-radius: 999px; cursor: pointer;
  font-family: var(--font-main); font-size: .82rem; font-weight: 800;
  color: var(--text-primary); transition: var(--transition-fast);
}
[data-theme="light"] .nav-streak-flame { background: #fff; box-shadow: 0 1px 2px rgba(0,0,0,.05); }
.nav-streak-flame:hover { border-color: #ff8a00; transform: translateY(-1px); box-shadow: 0 0 12px -2px #ff8a00; }
.nav-streak-num { color: #ff6a00; min-width: 14px; text-align: center; }
.nav-flame-mini { width: 19px; height: 23px; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }
.nav-flame-mini-svg { width: 100%; height: 100%; filter: drop-shadow(0 0 5px var(--huo-color, #ff8a00)); animation: hbFlicker 1.4s ease-in-out infinite; }
.nav-streak-flame:hover .nav-flame-mini-svg { filter: drop-shadow(0 0 8px var(--huo-color, #ff8a00)); }
.huobao-card-ielts { margin-bottom: 22px; }

/* ---------- 雅思页 · 小冰人（冰晶主题，功能与火宝宝一致） ---------- */
.huobao-card.ice {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.10), rgba(14, 165, 233, 0.03));
}
[data-theme="light"] .huobao-card.ice {
  background: linear-gradient(135deg, #eff9ff, #ffffff);
  border-color: #bae6fd;
}
/* 雅思页小冰人：复用同一张麒麟图。先 sepia 压成单色棕黄（保留明暗层次），再 hue-rotate 统一染冰蓝，避免彩色转色相时红角/金身变青绿紫 */
.hb-img-ice {
  filter: drop-shadow(0 0 14px #38bdf8) sepia(1) hue-rotate(175deg) saturate(2.8) brightness(1.08) contrast(1.03);
  animation: hbShimmer 2.4s ease-in-out infinite;
}
/* 小冰人等级光晕：覆盖 .hb-lv-N .hb-img 的火色光晕，保留 sepia+hue-rotate 冰色染色 */
.hb-lv-3 .hb-img-ice, .hb-lv-4 .hb-img-ice { filter: drop-shadow(0 0 18px #38bdf8) sepia(1) hue-rotate(175deg) saturate(2.8) brightness(1.08) contrast(1.03); }
.hb-lv-5 .hb-img-ice, .hb-lv-6 .hb-img-ice { filter: drop-shadow(0 0 22px #38bdf8) sepia(1) hue-rotate(175deg) saturate(2.8) brightness(1.08) contrast(1.03); }
.hb-lv-7 .hb-img-ice { filter: drop-shadow(0 0 26px #a5f3fc) drop-shadow(0 0 8px #38bdf8) sepia(1) hue-rotate(175deg) saturate(2.8) brightness(1.08) contrast(1.03); }
@keyframes hbShimmer {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.035); }
}
.huobao-card.ice .hb-title-badge {
  background: linear-gradient(135deg, var(--huo-color), #0ea5e9);
  box-shadow: 0 2px 8px -2px var(--huo-color);
}
.huobao-card.ice .hb-checkin {
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.4);
}
.huobao-card.ice .hb-checkin:hover {
  box-shadow: 0 6px 18px rgba(14, 165, 233, 0.5);
}
.huobao-card.ice .hb-speech { color: #0284c7; }

/* ---------- 庆祝彩带 ---------- */
.hb-confetti { position: fixed; inset: 0; pointer-events: none; z-index: 9998; overflow: hidden; }
.hb-confetti-piece {
  position: absolute; top: -24px; width: 9px; height: 14px; opacity: .95;
  animation-name: hbConfettiFall; animation-timing-function: linear; animation-fill-mode: forwards;
}
@keyframes hbConfettiFall {
  0% { transform: translateY(-24px) rotate(0); opacity: 1; }
  100% { transform: translateY(105vh) rotate(720deg); opacity: .9; }
}

/* ---------- 升级横幅 ---------- */
.hb-levelup {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  pointer-events: none; z-index: 9999; opacity: 0; transition: opacity .3s ease;
}
.hb-levelup.show { opacity: 1; }
.hb-levelup-card {
  background: var(--bg-card); color: var(--text-primary);
  padding: 26px 34px; border-radius: 20px; text-align: center;
  box-shadow: 0 20px 60px -12px rgba(0,0,0,.5);
  border: 2px solid var(--huo-color);
  animation: hbLevelupPop .5s cubic-bezier(.34,1.56,.64,1) forwards;
}
.hb-levelup.show .hb-levelup-card { animation: hbLevelupPop .5s cubic-bezier(.34,1.56,.64,1) forwards; }
@keyframes hbLevelupPop { 0% { transform: scale(.6); } 100% { transform: scale(1); } }
.hb-levelup-emoji { font-size: 3rem; animation: hbLevelupBounce 1s ease infinite; }
@keyframes hbLevelupBounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.hb-levelup-title { font-size: 1.1rem; font-weight: 800; margin-top: 4px; }
.hb-levelup-lv { font-size: 1.7rem; font-weight: 900; margin: 6px 0 2px; }
.hb-levelup-title2 { font-size: .95rem; font-weight: 700; color: var(--huo-color); margin-bottom: 8px; }
.hb-levelup-reward { font-size: .82rem; color: var(--text-secondary); max-width: 260px; }

/* ---------- 奖励弹窗 ---------- */
.hb-reward-modal {
  position: fixed; inset: 0; z-index: 10000; display: none;
  align-items: center; justify-content: center;
  background: rgba(0,0,0,.5); backdrop-filter: blur(3px);
}
.hb-reward-modal.show { display: flex; animation: hbFadeIn .25s ease; }
@keyframes hbFadeIn { from { opacity: 0; } to { opacity: 1; } }
.hb-reward-card {
  position: relative; background: var(--bg-card); color: var(--text-primary);
  width: min(360px, 88vw); border-radius: 22px; padding: 28px 24px 24px; text-align: center;
  border: 2px solid var(--huo-color); box-shadow: 0 24px 70px -14px rgba(0,0,0,.55);
  animation: hbLevelupPop .4s cubic-bezier(.34,1.56,.64,1);
}
.hb-reward-close {
  position: absolute; top: 12px; right: 14px; border: none; background: transparent;
  font-size: 1.1rem; color: var(--text-muted); cursor: pointer; line-height: 1;
}
.hb-reward-emoji { font-size: 3.2rem; filter: drop-shadow(0 0 14px var(--huo-color)); }
.hb-reward-lv { font-size: 1.4rem; font-weight: 900; margin: 6px 0; }
.hb-reward-title { font-size: .95rem; font-weight: 800; color: var(--huo-color); margin-bottom: 8px; }
.hb-reward-desc { font-size: .85rem; color: var(--text-secondary); line-height: 1.5; margin-bottom: 14px; }
.hb-reward-status {
  font-size: .8rem; font-weight: 700; padding: 6px 12px; border-radius: 999px;
  background: rgba(120,120,120,.14); color: var(--text-muted); margin-bottom: 14px; display: inline-block;
}
.hb-reward-status.got { background: rgba(34,197,94,.16); color: #16a34a; }
.hb-reward-share {
  border: none; background: linear-gradient(135deg, var(--huo-color), #ff8a00);
  color: #fff; font-weight: 800; font-size: .9rem; padding: 11px 18px; border-radius: 12px;
  cursor: pointer; font-family: var(--font-main); transition: transform .15s ease;
}
.hb-reward-share:hover { transform: translateY(-2px); }

/* ===== 火宝宝内嵌区块：今日任务 / 成长值明细 / 成就墙 ===== */
.hb-section { margin-top: 16px; padding: 12px 14px; background: var(--bg-secondary); border-radius: 14px; }
.hb-section-title { font-size: 0.82rem; font-weight: 800; color: var(--text-secondary); margin-bottom: 10px; }

/* 今日任务清单 */
.hb-tasks { display: flex; flex-direction: column; gap: 9px; }
.hb-task { display: grid; grid-template-columns: 22px 1fr auto; grid-template-rows: auto auto; gap: 2px 8px; align-items: center; }
.hb-task-ico { grid-row: 1 / span 2; font-size: 1.1rem; line-height: 1; }
.hb-task-name { font-size: 0.84rem; font-weight: 700; color: var(--text-primary); }
.hb-task-prog { font-size: 0.78rem; font-weight: 700; color: var(--huo-color, #fb923c); }
.hb-task.done .hb-task-name, .hb-task.done .hb-task-prog { color: #16a34a; }
.hb-task-bar { grid-column: 2 / span 2; height: 6px; background: rgba(128,128,128,.18); border-radius: 999px; overflow: hidden; }
.hb-task-fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--huo-color, #fb923c), #f59e0b); transition: width .5s ease; }
.hb-task.done .hb-task-fill { background: linear-gradient(90deg, #22c55e, #16a34a); }

/* 成长值明细（可折叠） */
.hb-log { cursor: pointer; }
.hb-log > summary { list-style: none; font-size: 0.82rem; font-weight: 800; color: var(--text-secondary); user-select: none; }
.hb-log > summary::-webkit-details-marker { display: none; }
.hb-log > summary::before { content: '▸ '; }
.hb-log[open] > summary::before { content: '▾ '; }
.hb-log-list { margin-top: 9px; display: flex; flex-direction: column; gap: 4px; max-height: 168px; overflow-y: auto; }
.hb-log-row { display: grid; grid-template-columns: 1fr auto auto; gap: 10px; font-size: 0.76rem; align-items: baseline; padding: 3px 2px; border-bottom: 1px dashed rgba(128,128,128,.14); }
.hb-log-reason { color: var(--text-primary); }
.hb-log-pts { font-weight: 800; color: #16a34a; }
.hb-log-bal { color: var(--text-muted); font-variant-numeric: tabular-nums; }
.hb-log-empty { font-size: 0.76rem; color: var(--text-muted); padding: 4px 2px; }

/* 成就墙 */
.hb-achievements { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.hb-ach { display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 8px 4px; border-radius: 10px; background: rgba(128,128,128,.08); opacity: .55; transition: transform .18s ease, opacity .18s ease; }
.hb-ach.got { opacity: 1; background: linear-gradient(160deg, rgba(251,146,60,.18), rgba(245,158,11,.1)); box-shadow: 0 0 12px -3px var(--huo-color, #fb923c); }
.hb-ach:hover { transform: translateY(-3px); }
.hb-ach-icon { font-size: 1.35rem; line-height: 1; filter: grayscale(1); }
.hb-ach.got .hb-ach-icon { filter: none; }
.hb-ach-name { font-size: 0.66rem; font-weight: 700; color: var(--text-primary); text-align: center; }

/* 火/冰主题切换按钮 */
.hb-theme-toggle { margin-left: auto; width: 30px; height: 30px; border: none; border-radius: 50%; background: var(--bg-secondary); font-size: 1rem; line-height: 1; cursor: pointer; transition: transform .2s ease, background .2s ease; display: flex; align-items: center; justify-content: center; }
.hb-theme-toggle:hover { transform: scale(1.12) rotate(12deg); background: rgba(251,146,60,.2); }

/* 升级横幅里的麒麟图：呼吸 + 光晕 */
.hb-levelup-mascot { width: 120px; height: 130px; margin: 2px auto 6px; display: flex; align-items: center; justify-content: center; animation: hbMascotGlow 1.5s ease-in-out infinite; }
.hb-levelup-mascot .hb-img { width: auto; height: auto; max-width: 100%; max-height: 100%; }
@keyframes hbMascotGlow {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 14px var(--huo-color, #fb923c)); }
  50%      { transform: scale(1.07); filter: drop-shadow(0 0 32px var(--huo-color, #fb923c)); }
}
.hb-levelup-mascot.ice { animation: hbMascotGlowIce 1.5s ease-in-out infinite; }
@keyframes hbMascotGlowIce {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 14px #38bdf8); }
  50%      { transform: scale(1.07); filter: drop-shadow(0 0 32px #38bdf8); }
}

@media (max-width: 768px) {
  .huobao-card { flex-direction: column; text-align: center; gap: 14px; }
  .hb-top, .hb-stats, .hb-actions, .hb-badges { justify-content: center; }
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  .navbar { padding: 0 12px; height: auto; min-height: 56px; }
  .navbar-brand span:not(.logo) { display: none; }
  .container { padding: 20px 16px; }
  .choices-grid { grid-template-columns: 1fr; }
  .question-word { font-size: 1.8rem; }
  .result-breakdown { flex-direction: column; gap: 16px; }
  .nav-tabs { padding: 4px; gap: 2px; border-radius: 10px; overflow-x: auto; max-width: 100%; }
  .nav-tab { padding: 5px 8px 5px 5px; font-size: 0.78rem; gap: 5px; border-radius: 7px; }
  .nav-icon { width: 22px; height: 22px; font-size: 0.85rem; border-radius: 6px; }
  .nav-mode-switch { padding: 5px 8px 5px 5px; font-size: 0.78rem; gap: 5px; border-radius: 7px; }
  .nav-divider { display: none; }
  .hero h1 { font-size: 1.5rem; }
  .mode-select-title { font-size: 1.6rem; }
  .mode-select-grid { grid-template-columns: 1fr; gap: 14px; }
  .mode-select-card { padding: 18px 20px; }
  .msc-icon { width: 48px; height: 48px; font-size: 1.4rem; }
}

@media (max-width: 480px) {
  .nav-tab .nav-label { display: none; }
  .nav-tab { padding: 5px; }
  .nav-mode-switch .nav-label { display: none; }
  .nav-mode-switch { padding: 5px; }
  .nav-divider { display: none; }
  .mode-select-sub { font-size: 0.85rem; margin-bottom: 22px; }
}

/* ==================== 工具类 ==================== */
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-20 { margin-bottom: 20px; }
.hidden { display: none !important; }

/* ==================== 软件封面 / 启动页 ==================== */
.app-cover {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg-primary);
  animation: coverFadeIn 0.5s ease both;
}
.app-cover.hide {
  animation: coverFadeOut 0.55s cubic-bezier(0.4, 0, 0.2, 1) both;
  pointer-events: none;
}
@keyframes coverFadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes coverFadeOut { from { opacity: 1; } to { opacity: 0; } }

/* ==================== 登录 / 注册页 ==================== */
.login-screen {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 20px;
  background: radial-gradient(circle at 30% 20%, #1a1d3a 0%, #0a0b14 55%, #06070d 100%);
  animation: coverFadeIn 0.4s ease both;
}
.login-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(72px);
  opacity: 0.5;
  animation: orbFloat 16s ease-in-out infinite;
}
.login-orb-1 { width: 380px; height: 380px; background: radial-gradient(circle, #6366f1, transparent 70%); top: -110px; left: -70px; }
.login-orb-2 { width: 340px; height: 340px; background: radial-gradient(circle, #a855f7, transparent 70%); bottom: -90px; right: -50px; animation-delay: -4s; }
.login-orb-3 { width: 280px; height: 280px; background: radial-gradient(circle, #38bdf8, transparent 70%); top: 40%; right: 12%; animation-delay: -8s; opacity: 0.32; }
.login-orb-4 { width: 240px; height: 240px; background: radial-gradient(circle, #ec4899, transparent 70%); bottom: 14%; left: 14%; animation-delay: -12s; opacity: 0.3; }
.login-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at center, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at center, #000 30%, transparent 75%);
}
.login-card {
  position: relative;
  z-index: 2;
  width: min(390px, 92vw);
  padding: 34px 30px 26px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  color: #eef0f6;
  animation: loginCardIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
@keyframes loginCardIn { from { opacity: 0; transform: translateY(18px) scale(0.97); } to { opacity: 1; transform: none; } }
.login-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(129,140,248,0.75), rgba(168,85,247,0.2) 45%, rgba(56,189,248,0.55));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}
.login-brand { display: flex; flex-direction: column; align-items: center; margin-bottom: 4px; }
.login-logo {
  width: 74px; height: 74px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.2rem;
  border-radius: 22px;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  box-shadow: 0 14px 32px rgba(99,102,241,0.5), inset 0 1px 2px rgba(255,255,255,0.45);
  animation: loginLogoBob 4s ease-in-out infinite;
}
@keyframes loginLogoBob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
.login-title {
  margin: 12px 0 4px;
  text-align: center;
  font-size: 1.62rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(120deg, #c7d2fe, #a78bfa, #67e8f9);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 2px 10px rgba(129,140,248,0.4));
}
.login-sub {
  margin: 0 0 22px;
  text-align: center;
  font-size: 0.86rem;
  color: rgba(238, 240, 246, 0.62);
}
.login-tabs {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 6px;
  padding: 5px;
  margin-bottom: 22px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.login-tab {
  position: relative;
  z-index: 1;
  flex: 1;
  padding: 10px 0;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 700;
  font-family: inherit;
  color: rgba(238, 240, 246, 0.6);
  background: transparent;
  transition: all 0.2s ease;
}
.login-tab.active {
  color: #fff;
}
.login-tab-ind {
  position: absolute;
  top: 5px;
  bottom: 5px;
  left: 5px;
  width: calc(50% - 8px);
  border-radius: 10px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.45);
  transition: transform 0.28s cubic-bezier(0.34, 1.3, 0.64, 1), left 0.28s cubic-bezier(0.34, 1.3, 0.64, 1), width 0.28s cubic-bezier(0.34, 1.3, 0.64, 1), height 0.28s cubic-bezier(0.34, 1.3, 0.64, 1);
  z-index: 0;
}
.login-form { display: flex; flex-direction: column; gap: 14px; }
.login-field { display: flex; flex-direction: column; gap: 6px; }
.login-label { font-size: 0.78rem; color: rgba(238, 240, 246, 0.7); font-weight: 600; }
.login-input-wrap { position: relative; display: flex; align-items: center; }
.login-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.28);
  color: #fff;
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.login-input::placeholder { color: rgba(238, 240, 246, 0.35); }
.login-input:focus {
  border-color: #818cf8;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}
.login-input-wrap .login-input { padding-left: 42px; padding-right: 44px; }
.login-ico {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  opacity: 0.55;
  pointer-events: none;
}
.login-eye {
  position: absolute;
  right: 8px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 1.05rem;
  opacity: 0.7;
  padding: 4px;
}
.login-eye:hover { opacity: 1; }
.login-err {
  min-height: 1.1em;
  font-size: 0.8rem;
  font-weight: 600;
  color: #ff7a8a;
}
.login-remember {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 2px 2px 6px;
  font-size: 0.82rem;
  color: rgba(238, 240, 246, 0.7);
  cursor: pointer;
  user-select: none;
}
.login-remember input {
  width: 15px;
  height: 15px;
  accent-color: #6366f1;
  cursor: pointer;
}
.login-form.login-shake { animation: loginShake 0.4s ease; }
@keyframes loginShake { 0%,100% { transform: translateX(0); } 20% { transform: translateX(-7px); } 40% { transform: translateX(7px); } 60% { transform: translateX(-5px); } 80% { transform: translateX(5px); } }
.login-submit {
  position: relative;
  overflow: hidden;
  margin-top: 4px;
  padding: 13px 0;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 800;
  font-family: inherit;
  color: #fff;
  letter-spacing: 2px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  box-shadow: 0 8px 22px rgba(99, 102, 241, 0.45);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.login-submit > span { position: relative; z-index: 1; }
.login-submit::after {
  content: '';
  position: absolute;
  top: 0;
  left: -60%;
  width: 45%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,0.5), transparent);
  transform: skewX(-20deg);
  animation: loginShine 3.4s ease-in-out infinite;
}
@keyframes loginShine { 0% { left: -60%; } 55%,100% { left: 130%; } }
.login-submit:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(99, 102, 241, 0.55); }
.login-submit:active { transform: translateY(0) scale(0.98); }
.login-foot {
  margin: 18px 0 0;
  text-align: center;
  font-size: 0.72rem;
  color: rgba(238, 240, 246, 0.45);
  line-height: 1.5;
}

/* ==================== 导航栏用户入口 ==================== */
.nav-user {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px 5px 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card-elevated);
  cursor: pointer;
  font-family: var(--font-main);
  color: var(--text-primary);
  transition: var(--transition-fast);
}
.nav-user:hover { border-color: #818cf8; box-shadow: 0 0 12px -2px #818cf8; }
.nav-user-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #6366f1, #a855f7);
}
.nav-user-name { font-size: 0.82rem; font-weight: 700; max-width: 90px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-user-caret { font-size: 0.6rem; opacity: 0.6; }
.nav-user-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  padding: 10px;
  border-radius: 14px;
  background: var(--bg-card-elevated);
  border: 1px solid var(--border);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.35);
  z-index: 999;
  display: none;
}
.nav-user-menu-name { font-size: 0.9rem; font-weight: 800; color: var(--text-primary); padding: 4px 6px; }
.nav-user-menu-hint { font-size: 0.7rem; color: var(--text-muted); padding: 0 6px 8px; }
.nav-user-menu-item {
  width: 100%;
  text-align: left;
  padding: 9px 8px;
  border: none;
  border-radius: 9px;
  background: transparent;
  color: #ff7a8a;
  font-size: 0.86rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease;
}
.nav-user-menu-item:hover { background: rgba(255, 122, 138, 0.12); }

/* ===== 设置面板 ===== */
.nav-settings-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-card-elevated);
  color: var(--text-primary);
  font-size: 1.05rem;
  cursor: pointer;
  transition: var(--transition-fast);
}
.nav-settings-btn:hover { border-color: #818cf8; box-shadow: 0 0 12px -2px #818cf8; transform: rotate(35deg); }

.settings-overlay {
  position: fixed; inset: 0;
  display: none;
  align-items: center; justify-content: center;
  background: rgba(8, 10, 20, 0.62);
  backdrop-filter: blur(4px);
  z-index: 10000;
  animation: settingsFade 0.18s ease;
}
@keyframes settingsFade { from { opacity: 0; } to { opacity: 1; } }
.settings-modal {
  width: min(420px, 92vw);
  max-height: 88vh;
  overflow-y: auto;
  padding: 22px 22px 24px;
  border-radius: 22px;
  background: var(--bg-card-elevated);
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  color: var(--text-primary);
  font-family: var(--font-main);
  animation: settingsPop 0.22s cubic-bezier(0.2, 0.9, 0.3, 1.3);
}
@keyframes settingsPop { from { opacity: 0; transform: translateY(16px) scale(0.96); } to { opacity: 1; transform: none; } }
.settings-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.settings-header h2 { margin: 0; font-size: 1.25rem; font-weight: 800; }
.settings-close { border: none; background: transparent; color: var(--text-muted); font-size: 1.1rem; cursor: pointer; padding: 4px 8px; border-radius: 8px; transition: background 0.15s ease, color 0.15s ease; }
.settings-close:hover { background: rgba(255, 255, 255, 0.08); color: var(--text-primary); }

.settings-tabs { display: flex; gap: 6px; padding: 5px; margin-bottom: 18px; border-radius: 14px; background: rgba(0, 0, 0, 0.22); border: 1px solid var(--border); }
.settings-tab { flex: 1; padding: 9px 0; border: none; border-radius: 10px; cursor: pointer; font-size: 0.9rem; font-weight: 700; font-family: inherit; color: rgba(238, 240, 246, 0.6); background: transparent; transition: all 0.2s ease; }
.settings-tab.active { color: #fff; background: linear-gradient(135deg, #6366f1, #8b5cf6); box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4); }

.settings-avatar-preview {
  width: 76px; height: 76px; margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-size: 2rem; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  box-shadow: 0 8px 22px rgba(99, 102, 241, 0.4);
}
.settings-field { margin-bottom: 16px; }
.settings-label { display: block; font-size: 0.82rem; font-weight: 700; margin-bottom: 8px; color: var(--text-secondary); }
.settings-hint { font-size: 0.72rem; color: var(--text-muted); margin: 6px 0 0; }

.settings-avatar-grid { display: grid; grid-template-columns: repeat(10, 1fr); gap: 6px; }
.settings-avatar {
  aspect-ratio: 1; border: 2px solid transparent; border-radius: 12px;
  background: rgba(255, 255, 255, 0.06); font-size: 1.25rem; cursor: pointer;
  transition: transform 0.12s ease, border-color 0.15s ease;
}
.settings-avatar:hover { transform: scale(1.12); }
.settings-avatar.active { border-color: #818cf8; background: rgba(129, 140, 248, 0.18); }

.settings-color-row { display: flex; flex-wrap: wrap; gap: 10px; }
.settings-color {
  width: 30px; height: 30px; border-radius: 50%; cursor: pointer;
  border: 2px solid transparent; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  transition: transform 0.12s ease, border-color 0.15s ease;
}
.settings-color:hover { transform: scale(1.12); }
.settings-color.active { border-color: #fff; transform: scale(1.15); }

.settings-input-wrap { position: relative; }
.settings-input {
  width: 100%; box-sizing: border-box;
  padding: 11px 12px; border-radius: 11px;
  border: 1px solid var(--border); background: rgba(0, 0, 0, 0.25);
  color: var(--text-primary); font-size: 0.92rem; font-family: inherit;
}
.settings-input:focus { outline: none; border-color: #818cf8; box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.2); }
.settings-input-wrap .settings-input { padding-right: 44px; }
.settings-eye { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); border: none; background: transparent; cursor: pointer; font-size: 1rem; padding: 6px; }

.settings-save {
  width: 100%; margin-top: 6px; padding: 12px 0; border: none; border-radius: 12px;
  cursor: pointer; font-size: 0.98rem; font-weight: 800; font-family: inherit; color: #fff; letter-spacing: 1px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  box-shadow: 0 8px 22px rgba(99, 102, 241, 0.4);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  position: relative; overflow: hidden;
}
.settings-save:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(99, 102, 241, 0.5); }
.settings-save:active { transform: translateY(0) scale(0.98); }
.settings-save::after {
  content: ''; position: absolute; top: 0; left: -60%; width: 50%; height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-20deg); animation: settingsShine 3.6s ease-in-out infinite;
}
@keyframes settingsShine { 0%, 60% { left: -60%; } 100% { left: 130%; } }

.settings-err { min-height: 1.1em; font-size: 0.8rem; font-weight: 600; color: #ff7a8a; }

.settings-avatar-actions { display: flex; gap: 8px; margin-top: 10px; }
.settings-upload-btn, .settings-clear-btn {
  flex: 1; padding: 9px 0; border-radius: 10px; cursor: pointer;
  font-size: 0.82rem; font-weight: 700; font-family: inherit;
  border: 1px solid var(--border); background: rgba(255, 255, 255, 0.05); color: var(--text-primary);
  transition: background 0.15s ease, border-color 0.15s ease;
}
.settings-upload-btn:hover, .settings-clear-btn:hover { border-color: #818cf8; background: rgba(129, 140, 248, 0.12); }

/* 亮色适配 */
[data-theme="light"] .settings-modal { background: rgba(255, 255, 255, 0.94); color: #1a1d2e; }
[data-theme="light"] .settings-label { color: rgba(26, 29, 46, 0.75); }
[data-theme="light"] .settings-input { background: rgba(255, 255, 255, 0.85); color: #1a1d2e; border-color: rgba(0, 0, 0, 0.15); }
[data-theme="light"] .settings-input::placeholder { color: rgba(26, 29, 46, 0.4); }
[data-theme="light"] .settings-tab { color: rgba(26, 29, 46, 0.6); }
[data-theme="light"] .settings-tab.active { color: #fff; }
[data-theme="light"] .settings-avatar { background: rgba(0, 0, 0, 0.05); }
[data-theme="light"] .login-card { color: #1a1d2e; background: rgba(255,255,255,0.72); }
[data-theme="light"] .login-sub { color: rgba(26, 29, 46, 0.6); }
[data-theme="light"] .login-title { background: linear-gradient(120deg, #4338ca, #7c3aed, #0891b2); -webkit-background-clip: text; background-clip: text; color: transparent; filter: none; }
[data-theme="light"] .login-tab { color: rgba(26, 29, 46, 0.6); }
[data-theme="light"] .login-tab.active { color: #fff; }
[data-theme="light"] .login-label { color: rgba(26, 29, 46, 0.75); }
[data-theme="light"] .login-ico { opacity: 0.5; }
[data-theme="light"] .login-input { background: rgba(255,255,255,0.85); color: #1a1d2e; border-color: rgba(0,0,0,0.15); }
[data-theme="light"] .login-input::placeholder { color: rgba(26,29,46,0.4); }
[data-theme="light"] .login-remember { color: rgba(26, 29, 46, 0.7); }

/* 背景光球 */
.cover-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(72px);
  opacity: 0.55;
  animation: orbFloat 16s ease-in-out infinite;
  box-shadow: 0 0 140px 50px rgba(99, 102, 241, 0.22);
}
.cover-orb-1 {
  width: 420px; height: 420px;
  background: radial-gradient(circle, #6366f1, transparent 70%);
  top: -120px; left: -80px;
}
.cover-orb-2 {
  width: 360px; height: 360px;
  background: radial-gradient(circle, #a855f7, transparent 70%);
  bottom: -100px; right: -60px;
  animation-delay: -4s;
}
.cover-orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, #22d3ee, transparent 70%);
  top: 40%; left: 55%;
  animation-delay: -8s;
  opacity: 0.4;
}
.cover-orb-4 {
  width: 240px; height: 240px;
  background: radial-gradient(circle, #f59e0b, transparent 70%);
  bottom: 12%; left: 6%;
  animation-delay: -11s;
  opacity: 0.32;
}
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.08); }
  66% { transform: translate(-30px, 20px) scale(0.95); }
}

/* 背景网格 */
.cover-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at 50% 45%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 45%, #000 30%, transparent 75%);
}

/* 内容层 */
.cover-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 40px 32px;
  max-width: 860px;
  width: 100%;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 28px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
  animation: coverRise 0.7s cubic-bezier(0.34, 1.2, 0.64, 1) both;
}
@keyframes coverRise {
  from { opacity: 0; transform: translateY(28px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.cover-logo {
  font-size: 4.2rem;
  line-height: 1;
  margin-bottom: 18px;
  filter: drop-shadow(0 8px 24px rgba(99,102,241,0.4));
  animation: logoPulse 3s ease-in-out infinite;
}
@keyframes logoPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}
.cover-title {
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 10px;
}
.cover-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}
.cover-tagline {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-light);
  padding: 8px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--accent-dim);
  margin-bottom: 34px;
}

/* 方法卡片 */
.cover-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 38px;
}
.cover-method {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 18px;
  text-align: left;
  transition: var(--transition);
  opacity: 0;
  transform: translateY(16px);
  animation: methodIn 0.5s ease forwards;
  animation-delay: calc(0.35s + var(--i) * 0.12s);
}
@keyframes methodIn {
  to { opacity: 1; transform: translateY(0); }
}
.cover-method:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 12px 40px rgba(99,102,241,0.25), 0 0 0 1px var(--accent);
}
.cover-method-icon {
  font-size: 1.9rem;
  margin-bottom: 12px;
}
.cover-method-title {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.cover-method-desc {
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

/* 进入按钮 */
.cover-enter-btn {
  font-family: var(--font-main);
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  border: none;
  cursor: pointer;
  padding: 16px 52px;
  border-radius: 999px;
  background: var(--accent-gradient);
  background-size: 200% 200%;
  box-shadow: 0 10px 36px rgba(99,102,241,0.45);
  transition: var(--transition-spring);
  animation: btnGlow 2.4s ease-in-out infinite;
}
@keyframes btnGlow {
  0%, 100% { background-position: 0% 50%; box-shadow: 0 10px 36px rgba(99,102,241,0.4); }
  50% { background-position: 100% 50%; box-shadow: 0 12px 48px rgba(168,85,247,0.6); }
}
.cover-enter-btn:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 16px 56px rgba(168,85,247,0.65);
}
.cover-enter-btn:active {
  transform: translateY(0) scale(0.98);
}
.cover-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-top: 4px;
}
.cover-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  animation: coverFadeIn 0.45s ease both;
}
.cover-loading-text::after {
  content: "";
  animation: loadingDots 1.4s steps(4, end) infinite;
}
@keyframes loadingDots {
  0% { content: ""; }
  25% { content: "."; }
  50% { content: ".."; }
  75% { content: "..."; }
}
.cover-spinner {
  position: relative;
  width: 66px;
  height: 66px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, #6366f1, #a855f7, #22d3ee, #6366f1);
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 7px), #000 calc(100% - 6px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 7px), #000 calc(100% - 6px));
  animation: coverSpin 1s linear infinite;
  filter: drop-shadow(0 0 16px rgba(99, 102, 241, 0.55));
}
.cover-spinner::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.95);
  animation: corePulse 1.4s ease-in-out infinite;
}
@keyframes coverSpin {
  to { transform: rotate(360deg); }
}
@keyframes corePulse {
  0%, 100% { transform: scale(0.65); opacity: 0.7; }
  50% { transform: scale(1.15); opacity: 1; }
}
@keyframes coverFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
.cover-foot {
  margin-top: 22px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

@media (max-width: 560px) {
  .cover-logo { font-size: 3.2rem; }
  .cover-methods { grid-template-columns: 1fr 1fr; }
}

/* ==================== 雅思专项模块 ==================== */
.ielts-panel { display: none; }
.ielts-tabs {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px;
  background: var(--bg-secondary); padding: 6px; border-radius: var(--radius); border: 1px solid var(--border);
}
.ielts-tab {
  flex: 1; min-width: 90px; padding: 10px 14px; border: none; border-radius: var(--radius-sm);
  background: transparent; color: var(--text-secondary); font-size: 0.92rem; font-weight: 600; cursor: pointer; transition: var(--transition-fast);
}
.ielts-tab:hover { color: var(--text-primary); background: var(--bg-hover); }
.ielts-tab.active { background: var(--accent-gradient); color: #fff; box-shadow: var(--shadow-glow); }
.ielts-subtabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.ielts-subtab {
  padding: 8px 16px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-card); color: var(--text-secondary); font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: var(--transition-fast);
}
.ielts-subtab:hover { color: var(--text-primary); border-color: var(--border-strong); }
.ielts-subtab.active { background: var(--accent-dim); color: var(--accent-light); border-color: var(--accent); }

/* 词汇首页 */
.ielts-vocab-tools { margin-bottom: 16px; }
.ielts-vocab-hint { font-size: 0.82rem; color: var(--text-secondary); }
.ielts-topic-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
.ielts-topic-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px;
  cursor: pointer; transition: var(--transition); position: relative; overflow: hidden;
}
.ielts-topic-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--shadow-glow); }
.ielts-topic-icon { font-size: 1.8rem; margin-bottom: 8px; }
.ielts-topic-name { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.ielts-topic-count { font-size: 0.78rem; color: var(--text-secondary); margin-bottom: 10px; }
.ielts-topic-bar { height: 6px; border-radius: 999px; background: var(--bg-hover); overflow: hidden; }
.ielts-topic-fill { height: 100%; border-radius: 999px; background: var(--accent-gradient); transition: width 0.4s ease; }

/* 分级词库 A1→C2 */
.ielts-level-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.ielts-level-card {
  background: var(--bg-card); border: 1px solid var(--border); border-left: 5px solid var(--accent);
  border-radius: var(--radius); padding: 16px 18px; cursor: pointer; transition: var(--transition); position: relative; overflow: hidden;
}
.ielts-level-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.ielts-level-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.ielts-level-badge { font-size: 1.15rem; font-weight: 800; color: #fff; background: var(--accent); border-radius: 10px; padding: 2px 12px; letter-spacing: 1px; }
.ielts-level-band { font-size: 0.74rem; color: var(--text-secondary); margin-left: auto; }
.ielts-level-name { font-size: 1.02rem; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.ielts-level-desc { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; margin-bottom: 12px; min-height: 36px; }
.lvl-A1 { border-left-color: #5bb97d; } .lvl-A1 .ielts-level-badge { background: #5bb97d; }
.lvl-A2 { border-left-color: #4ba3d6; } .lvl-A2 .ielts-level-badge { background: #4ba3d6; }
.lvl-B1 { border-left-color: #6f6fe0; } .lvl-B1 .ielts-level-badge { background: #6f6fe0; }
.lvl-B2 { border-left-color: #d68a3a; } .lvl-B2 .ielts-level-badge { background: #d68a3a; }
.lvl-C1 { border-left-color: #d65a8a; } .lvl-C1 .ielts-level-badge { background: #d65a8a; }
.lvl-C2 { border-left-color: #b3432f; } .lvl-C2 .ielts-level-badge { background: #b3432f; }

/* 学习模式 */
.ielts-study-head { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; flex-wrap: wrap; }
.ielts-study-title { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.ielts-mode-switch { margin-left: auto; display: flex; gap: 6px; background: var(--bg-secondary); padding: 4px; border-radius: 999px; }
.ielts-mode-btn { padding: 6px 14px; border: none; border-radius: 999px; background: transparent; color: var(--text-secondary); font-size: 0.82rem; font-weight: 600; cursor: pointer; transition: var(--transition-fast); }
.ielts-mode-btn.active { background: var(--accent-gradient); color: #fff; }
.ielts-study-progress { font-size: 0.82rem; color: var(--text-secondary); margin-bottom: 16px; }

/* 闪卡 */
.ielts-flashcard {
  position: relative; perspective: 1200px; min-height: 280px; cursor: pointer; margin-bottom: 16px;
}
.ielts-flash-front, .ielts-flash-back {
  position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden;
  border-radius: var(--radius); border: 1px solid var(--border); padding: 28px 24px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  transition: transform 0.55s cubic-bezier(0.4, 0.2, 0.2, 1);
}
.ielts-flash-front { background: var(--accent-gradient-soft); border-color: var(--accent); }
.ielts-flash-back { background: var(--bg-card); transform: rotateY(180deg); }
.ielts-flashcard.flipped .ielts-flash-front { transform: rotateY(180deg); }
.ielts-flashcard.flipped .ielts-flash-back { transform: rotateY(0); }
.ielts-flash-word { font-size: 2.2rem; font-weight: 800; color: var(--text-primary); letter-spacing: 0.5px; }
.ielts-flash-phon { font-size: 1rem; color: var(--text-secondary); margin-top: 8px; font-family: var(--font-mono); }
.ielts-flash-hint { font-size: 0.78rem; color: var(--text-muted); margin-top: 16px; }
.ielts-flash-pos { font-size: 0.85rem; color: var(--accent-light); font-weight: 700; margin-bottom: 8px; }
.ielts-flash-meaning { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); }
.ielts-flash-ex { font-size: 0.95rem; color: var(--text-secondary); margin-top: 14px; font-style: italic; line-height: 1.5; }
.ielts-flash-excn { font-size: 0.9rem; color: var(--text-muted); margin-top: 6px; }
.ielts-speak-btn {
  position: absolute; top: 14px; right: 14px; width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--border-strong); background: var(--bg-card-elevated); color: var(--accent-light);
  font-size: 1.1rem; cursor: pointer; transition: var(--transition-fast);
}
.ielts-speak-btn:hover { background: var(--accent); color: #fff; transform: scale(1.08); }
.ielts-speak-btn-sm { position: static; width: auto; height: auto; border-radius: 999px; padding: 8px 16px; margin-top: 14px; font-size: 0.85rem; }
.ielts-flash-actions { display: flex; gap: 12px; }
.ielts-flash-actions .btn { flex: 1; }

/* 口语 */
.ielts-speak-timer-bar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 16px;
  background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 16px;
  font-size: 0.85rem; color: var(--text-secondary);
}
.ielts-timer-text { font-family: var(--font-mono); font-weight: 700; color: var(--accent-light); }
.ielts-timer-text.prep { color: var(--warning); }
.ielts-timer-text.speak { color: var(--success); }
.ielts-speak-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 12px; }
.ielts-speak-q { font-size: 1rem; font-weight: 600; color: var(--text-primary); line-height: 1.5; margin-bottom: 10px; }
.ielts-speak-part { display: inline-block; font-size: 0.7rem; font-weight: 800; color: #fff; background: var(--accent); border-radius: 4px; padding: 2px 8px; margin-right: 8px; letter-spacing: 0.04em; }
.ielts-speak-toggle { background: none; border: none; color: var(--accent-light); font-size: 0.85rem; cursor: pointer; padding: 0; font-weight: 600; }
.ielts-speak-toggle:hover { text-decoration: underline; }
.ielts-speak-detail { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--border-strong); }
.ielts-speak-sample { font-size: 0.92rem; color: var(--text-primary); line-height: 1.6; margin-bottom: 10px; }
.ielts-speak-tips { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }

/* 写作 */
.ielts-write-guide h3 { font-size: 1.15rem; color: var(--text-primary); margin-bottom: 8px; }
.ielts-write-intro { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.6; }
.ielts-write-block { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px 18px; margin-bottom: 14px; }
.ielts-write-block h4 { font-size: 0.92rem; color: var(--accent-light); margin-bottom: 10px; }
.ielts-write-block ul { margin: 0; padding-left: 18px; color: var(--text-secondary); font-size: 0.88rem; line-height: 1.8; }
.ielts-chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.ielts-chip { font-size: 0.82rem; padding: 5px 12px; border-radius: 999px; background: var(--accent-dim); color: var(--accent-light); border: 1px solid transparent; }
.ielts-frame { font-size: 0.88rem; color: var(--text-primary); background: var(--bg-secondary); border-left: 3px solid var(--accent); padding: 8px 12px; border-radius: 0 var(--radius-xs) var(--radius-xs) 0; margin-bottom: 8px; font-family: var(--font-mono); }
.ielts-phrase-list { display: grid; gap: 10px; }
.ielts-phrase { display: flex; gap: 12px; align-items: baseline; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 16px; }
.ielts-phrase-en { font-weight: 700; color: var(--accent-light); font-family: var(--font-mono); flex-shrink: 0; }
.ielts-phrase-cn { color: var(--text-secondary); font-size: 0.9rem; }
.ielts-write-practice { margin-top: 20px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.ielts-write-practice-head { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 10px; }
.ielts-write-practice-head .ielts-timer-text { margin-left: auto; }
.ielts-write-box { width: 100%; min-height: 180px; resize: vertical; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-primary); font-size: 0.95rem; line-height: 1.7; padding: 14px; font-family: var(--font-main); }
.ielts-write-box:focus { outline: none; border-color: var(--accent); }
.ielts-write-foot { display: flex; justify-content: space-between; font-size: 0.82rem; color: var(--text-secondary); margin-top: 8px; }
.ielts-write-count.ok { color: var(--success); font-weight: 700; }

/* 评分标准 */
.ielts-band-section { margin-bottom: 22px; }
.ielts-band-section h3 { font-size: 1.1rem; color: var(--text-primary); margin-bottom: 12px; }
.ielts-band-table { width: 100%; border-collapse: collapse; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.ielts-band-table th { background: var(--bg-secondary); color: var(--text-secondary); font-size: 0.82rem; text-align: left; padding: 10px 14px; }
.ielts-band-table td { padding: 10px 14px; font-size: 0.88rem; color: var(--text-secondary); border-top: 1px solid var(--border); }
.ielts-band-table td b { color: var(--accent-light); }
.ielts-band-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 22px; }
.ielts-band-col h3 { font-size: 1.05rem; color: var(--text-primary); margin-bottom: 12px; }
.ielts-crit-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.ielts-crit { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; }
.ielts-crit-code { display: inline-block; font-weight: 800; color: #fff; background: var(--accent-gradient); border-radius: 6px; padding: 3px 10px; font-size: 0.85rem; margin-bottom: 8px; }
.ielts-crit-name { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.ielts-crit-note { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }

/* ===== 雅思词汇：搜索 / 筛选 ===== */
.ielts-search-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 14px; margin-bottom: 12px; }
.ielts-search-ico { font-size: 1rem; opacity: 0.7; }
.ielts-search-input { flex: 1; min-width: 180px; padding: 9px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--bg-card); color: var(--text-primary); font-size: 0.9rem; }
.ielts-search-input:focus { outline: none; border-color: var(--accent); }
.ielts-mastery-filter { padding: 9px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--bg-card); color: var(--text-primary); font-size: 0.85rem; cursor: pointer; }
.ielts-search-clear { white-space: nowrap; }
.ielts-level-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
.ielts-level-chip { padding: 5px 16px; border-radius: 999px; border: 1px solid var(--border); background: var(--bg-card); color: var(--text-secondary); font-size: 0.82rem; font-weight: 700; cursor: pointer; transition: var(--transition-fast); }
.ielts-level-chip.on { background: var(--accent-gradient); color: #fff; border-color: transparent; }
.ielts-level-chip:not(.on) { opacity: 0.55; }
.ielts-results-empty { text-align: center; color: var(--text-secondary); padding: 40px 0; font-size: 0.95rem; }
.ielts-results-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.ielts-results-count { font-size: 0.95rem; color: var(--text-primary); }
.ielts-results-count b { color: var(--accent-light); }
.ielts-results-actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }
.ielts-results-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; max-height: 60vh; overflow-y: auto; padding: 4px; }
.ielts-res-word { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 10px 14px; cursor: pointer; transition: var(--transition-fast); }
.ielts-res-word:hover { border-color: var(--accent); transform: translateY(-2px); }
.ielts-res-word-main { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.ielts-res-word-text { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); }
.ielts-res-word-phon { font-size: 0.8rem; color: var(--text-secondary); font-family: var(--font-mono); }
.ielts-res-word-lvl { font-size: 0.66rem; font-weight: 800; color: #fff; background: var(--accent); border-radius: 6px; padding: 1px 7px; }
.ielts-res-word-meaning { font-size: 0.84rem; color: var(--text-secondary); margin-top: 4px; }
.ielts-level-export { margin-top: 10px; width: 100%; }

/* ===== 雅思词汇：听音拼写 ===== */
.ielts-spell-card { align-items: center; }
.ielts-spell-prompt { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 16px; }
.ielts-spell-speed { display: flex; align-items: center; gap: 6px; margin-top: 14px; font-size: 0.8rem; color: var(--text-secondary); }
.ielts-spell-speed-btn { padding: 5px 12px; border: 1px solid var(--border); border-radius: 999px; background: var(--bg-card); color: var(--text-secondary); font-size: 0.78rem; cursor: pointer; }
.ielts-spell-speed-btn.active { background: var(--accent-dim); color: var(--accent-light); border-color: var(--accent); }
.ielts-spell-input-wrap { display: flex; gap: 10px; margin-top: 18px; width: 100%; max-width: 420px; }
.ielts-spell-input { flex: 1; padding: 12px 16px; border: 2px solid var(--border); border-radius: 12px; background: var(--bg-card); color: var(--text-primary); font-size: 1.2rem; letter-spacing: 1px; }
.ielts-spell-input:focus { outline: none; border-color: var(--accent); }
.ielts-spell-feedback { width: 100%; max-width: 420px; margin-top: 16px; min-height: 20px; }
.ielts-spell-ok { color: var(--success); font-size: 1.1rem; font-weight: 700; }
.ielts-spell-bad { color: var(--danger); font-size: 1rem; font-weight: 700; }
.ielts-spell-phon { color: var(--text-secondary); font-weight: 400; font-family: var(--font-mono); }
.ielts-spell-meaning { font-size: 0.88rem; color: var(--text-secondary); margin-top: 6px; }
.ielts-spell-next { margin-top: 16px; }

/* ===== 雅思词汇：导出按钮 ===== */
.ielts-export-btn { margin-left: auto; padding: 6px 12px; font-size: 0.8rem; }

/* ===== 雅思单词卡打印（导出 PDF） ===== */
#ielts-print-area { display: none; }
.ielts-pc-title { font-size: 18px; font-weight: 800; margin-bottom: 14px; color: #111; }
.ielts-pc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.ielts-pc-card { border: 1px solid #bbb; border-radius: 8px; padding: 10px 12px; break-inside: avoid; page-break-inside: avoid; }
.ielts-pc-word { font-size: 16px; font-weight: 800; color: #111; }
.ielts-pc-phon { font-size: 12px; color: #555; font-family: var(--font-mono); margin-top: 2px; }
.ielts-pc-pos { font-size: 11px; color: #2563eb; font-weight: 700; margin-top: 4px; }
.ielts-pc-meaning { font-size: 14px; color: #111; margin-top: 2px; }
.ielts-pc-ex { font-size: 12px; color: #333; font-style: italic; margin-top: 5px; }
.ielts-pc-excn { font-size: 11px; color: #666; }
@media print {
  body * { visibility: hidden !important; }
  #ielts-print-area, #ielts-print-area * { visibility: visible !important; }
  #ielts-print-area { display: block !important; position: absolute; top: 0; left: 0; width: 100%; padding: 16px; background: #fff; }
  .ielts-pc-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 680px) {
  .ielts-band-grid { grid-template-columns: 1fr; }
}

/* ---------- 雅思写作提示卡 / 批改 ---------- */
.ielts-guide { background: var(--card-bg, #fff); border: 1px solid var(--border, #e6e8ef); border-radius: 14px; padding: 4px 16px; margin-bottom: 14px; }
.ielts-guide summary { cursor: pointer; font-weight: 600; padding: 12px 0; color: var(--text, #233); list-style: none; }
.ielts-guide summary::-webkit-details-marker { display: none; }
.ielts-guide[open] summary { border-bottom: 1px dashed var(--border, #e6e8ef); margin-bottom: 8px; }

.ielts-write-prompt-card { background: linear-gradient(135deg, #eef4ff, #f7f0ff); border: 1px solid #dfe6f5; border-radius: 16px; padding: 18px 20px; margin-bottom: 16px; }
.ielts-write-prompt-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.ielts-write-prompt-tag { background: var(--accent-gradient, linear-gradient(90deg,#6a8dff,#9b6bff)); color: #fff; font-size: .8rem; font-weight: 700; padding: 4px 12px; border-radius: 999px; }
.ielts-write-prompt-q { font-size: 1.06rem; font-weight: 700; line-height: 1.6; color: #1f2a44; }
.ielts-write-prompt-cn { margin-top: 8px; color: #3a4a6b; line-height: 1.6; }
.ielts-write-prompt-tip { margin-top: 8px; font-size: .9rem; color: #5a6b8c; background: rgba(255,255,255,.6); border-left: 3px solid #8aa0ff; padding: 8px 12px; border-radius: 8px; }

.ielts-write-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.ielts-write-sample { margin-top: 14px; border: 1px dashed #b9c6e6; border-radius: 12px; padding: 14px 16px; background: #fbfdff; }
.ielts-sample-head { font-weight: 700; color: #2a3a5c; margin-bottom: 8px; }
.ielts-sample-body { white-space: pre-wrap; line-height: 1.8; color: #33425f; font-size: .96rem; }

/* 批改面板 */
.ielts-feedback { margin-top: 18px; background: var(--card-bg, #fff); border: 1px solid var(--border, #e6e8ef); border-radius: 16px; padding: 18px 20px; }
.ielts-fb-overall { display: flex; align-items: center; gap: 16px; padding-bottom: 14px; border-bottom: 1px solid var(--border, #e6e8ef); }
.ielts-fb-overall-num { font-size: 2.6rem; font-weight: 800; width: 84px; height: 84px; border-radius: 18px; display: flex; align-items: center; justify-content: center; color: #fff; background: #8a93a8; }
.ielts-fb-overall-num.good { background: linear-gradient(135deg,#2e9e5b,#37b86b); }
.ielts-fb-overall-num.mid { background: linear-gradient(135deg,#e0a000,#f0b73c); }
.ielts-fb-overall-num.low { background: linear-gradient(135deg,#d9534f,#e8716d); }
.ielts-fb-overall-label { font-weight: 700; font-size: 1.05rem; color: #1f2a44; }
.ielts-fb-overall-sub { font-size: .88rem; color: #5a6b8c; margin-top: 2px; }
.ielts-fb-disclaimer { font-size: .82rem; color: #7a88a3; background: #f3f6fb; border-radius: 10px; padding: 8px 12px; margin: 12px 0; line-height: 1.6; }
.ielts-fb-crits { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.ielts-fb-crit { background: #fafbfe; border: 1px solid var(--border, #e6e8ef); border-radius: 12px; padding: 12px 14px; }
.ielts-fb-crit-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.ielts-fb-code { font-weight: 800; font-size: .85rem; color: #fff; background: #6a8dff; border-radius: 6px; padding: 2px 8px; }
.ielts-fb-crit-name { flex: 1; font-size: .9rem; font-weight: 600; color: #2a3a5c; }
.ielts-fb-band { font-weight: 800; font-size: 1rem; padding: 2px 10px; border-radius: 8px; color: #fff; background: #8a93a8; }
.ielts-fb-band.good { background: #2e9e5b; }
.ielts-fb-band.mid { background: #e0a000; }
.ielts-fb-band.low { background: #d9534f; }
.ielts-fb-items { margin: 0; padding-left: 18px; }
.ielts-fb-items li { font-size: .86rem; color: #41506e; line-height: 1.65; margin-bottom: 4px; }
.ielts-fb-issues { margin-top: 14px; background: #fff7f6; border: 1px solid #f3d2cf; border-radius: 12px; padding: 12px 14px; }
.ielts-fb-issues.ok { background: #f1faf3; border-color: #cfe9d3; }
.ielts-fb-issues h4 { margin: 0 0 8px; font-size: .95rem; color: #c0392b; }
.ielts-fb-issues.ok h4 { color: #2e9e5b; }
.ielts-fb-issues ul { margin: 0; padding-left: 0; list-style: none; }
.ielts-fb-issues li { font-size: .86rem; color: #5a463f; line-height: 1.7; margin-bottom: 6px; }
.ielts-issue-type { display: inline-block; font-size: .72rem; font-weight: 700; color: #fff; background: #d9534f; border-radius: 6px; padding: 1px 7px; margin-right: 6px; }
.ielts-fb-issues code { background: #fbe9e7; padding: 1px 6px; border-radius: 5px; font-size: .82rem; color: #b03a30; }
@media (max-width: 680px) {
  .ielts-fb-crits { grid-template-columns: 1fr; }
}

/* ==================== 社区页 ==================== */
.community-checkin-section { margin-bottom: 24px; }
.checkin-card {
  display: flex; align-items: center; gap: 16px;
  background: linear-gradient(135deg, #1a1d2e, #1e2238);
  border: 1px solid #2a2f48; border-radius: 16px;
  padding: 20px 24px;
}
.checkin-icon { font-size: 2.5rem; }
.checkin-info { flex: 1; }
.checkin-title { font-size: 1.1rem; font-weight: 700; color: #e0e0e0; }
.checkin-streak { font-size: 0.85rem; color: #888; margin-top: 4px; }
.checkin-btn {
  background: linear-gradient(135deg, #f97316, #ea580c);
  color: #fff; border: none; border-radius: 12px;
  padding: 12px 24px; font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: transform .2s, box-shadow .2s;
}
.checkin-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(249,115,22,.3); }
.checkin-btn:disabled { background: #333; color: #666; cursor: not-allowed; transform: none; box-shadow: none; }
.checkin-btn.done { background: #166534; color: #4ade80; }

.community-section { margin-bottom: 28px; }
.community-loading { text-align: center; color: #666; padding: 20px; font-size: 0.9rem; }

.leaderboard-list { display: flex; flex-direction: column; gap: 8px; }
.leaderboard-item {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-card); border: 1px solid #1e2238; border-radius: 12px;
  padding: 12px 16px; transition: border-color .2s;
}
.leaderboard-item:hover { border-color: #3a3f58; }
.leaderboard-item.me { border-color: #f97316; background: #1a1614; }
.leaderboard-rank {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 700; flex-shrink: 0;
}
.leaderboard-rank.r1 { background: linear-gradient(135deg, #fbbf24, #d97706); color: #fff; }
.leaderboard-rank.r2 { background: linear-gradient(135deg, #94a3b8, #64748b); color: #fff; }
.leaderboard-rank.r3 { background: linear-gradient(135deg, #d97706, #92400e); color: #fff; }
.leaderboard-rank.other { background: #1e2238; color: #888; }
.leaderboard-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; background: #2a2f48; flex-shrink: 0;
}
.leaderboard-name { flex: 1; font-size: 0.95rem; color: #ccc; }
.leaderboard-growth { font-size: 0.9rem; font-weight: 600; color: #f97316; }

.checkin-square { display: flex; flex-wrap: wrap; gap: 10px; }
.checkin-user {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-card); border: 1px solid #1e2238; border-radius: 10px;
  padding: 8px 14px;
}
.checkin-user-avatar { font-size: 1.2rem; }
.checkin-user-name { font-size: 0.85rem; color: #aaa; }
.checkin-empty { color: #555; font-size: 0.85rem; padding: 12px; }