/* ============================================================
   童趣学习乐园 —— 全局样式
   ============================================================ */
* { margin:0; padding:0; box-sizing:border-box; }

:root {
  --bg-grad: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --sidebar-bg: #fff5eb;
  --sidebar-active: #ffd93d;
  --content-bg: #f8f9ff;
  --primary: #6c5ce7;
  --primary-light: #a29bfe;
  --accent: #ff6b6b;
  --success: #51cf66;
  --danger: #ff6b6b;
  --warning: #ffd93d;
  --text-dark: #2d3436;
  --text-light: #636e72;
  --card-shadow: 0 4px 20px rgba(0,0,0,0.08);
  --radius: 18px;
  --radius-sm: 12px;
}

body {
  font-family: "PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  background: var(--bg-grad);
  min-height: 100vh;
  overflow: hidden;
  user-select: none;
}

#app {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- 顶部栏 ---------- */
.top-bar {
  height: 60px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  box-shadow: 0 2px 15px rgba(0,0,0,0.1);
  z-index: 100;
  flex-shrink: 0;
}

.logo {
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, #6c5ce7, #ff6b6b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

.top-stats {
  display: flex;
  gap: 16px;
}

.stat-item {
  background: #fff;
  border: 2px solid #eee;
  border-radius: 30px;
  padding: 6px 18px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: transform 0.2s;
}
.stat-item.stars { border-color: #ffd93d; background: #fffbeb; }
.stat-item.food { border-color: #ffa502; background: #fff5e6; }
.stat-item.checkin { border-color: #51cf66; background: #f0fff4; }
.stat-item:hover { transform: scale(1.08); }

/* ---------- 主布局 ---------- */
.main-wrapper {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* ---------- 左侧导航 ---------- */
.sidebar {
  width: 160px;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  gap: 8px;
  overflow-y: auto;
  flex-shrink: 0;
  box-shadow: 2px 0 15px rgba(0,0,0,0.05);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 14px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.25s ease;
  color: var(--text-dark);
  font-size: 13px;
  font-weight: 600;
  text-align: center;
}

.nav-item:hover {
  background: rgba(255,217,61,0.3);
  transform: translateX(4px);
}

.nav-item.active {
  background: var(--sidebar-active);
  box-shadow: 0 4px 12px rgba(255,217,61,0.5);
  transform: scale(1.05);
}

.nav-icon { font-size: 30px; }
.nav-label { font-size: 13px; }

.nav-item.pet-nav {
  margin-top: auto;
  background: linear-gradient(135deg, #ffecd2, #fcb69f);
  border-radius: var(--radius-sm);
}
.nav-item.pet-nav.active {
  background: linear-gradient(135deg, #ffd93d, #ff9f43);
}

/* ---------- 主内容区 ---------- */
.content {
  flex: 1;
  background: var(--content-bg);
  overflow-y: auto;
  padding: 24px 32px;
  position: relative;
}

.content::-webkit-scrollbar { width: 8px; }
.content::-webkit-scrollbar-track { background: #f1f1f1; border-radius: 4px; }
.content::-webkit-scrollbar-thumb { background: #ccc; border-radius: 4px; }

/* ---------- 通用组件 ---------- */
.module-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.module-header h2 {
  font-size: 26px;
  color: var(--text-dark);
}
.module-header .icon { font-size: 36px; }

.module-desc {
  color: var(--text-light);
  font-size: 15px;
  margin-bottom: 24px;
  line-height: 1.6;
}

/* 进度条 */
.progress-bar {
  background: #e9ecef;
  border-radius: 20px;
  height: 24px;
  overflow: hidden;
  margin-bottom: 20px;
  position: relative;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #51cf66, #40c057);
  border-radius: 20px;
  transition: width 0.5s ease;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 10px;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  min-width: 50px;
}

/* 大按钮 */
.btn {
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 36px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,0,0,0.15); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--primary); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: var(--text-dark); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-info { background: #17a2b8; color: #fff; }
.btn-purple { background: #845ef7; color: #fff; }
.btn-outline { background: #fff; color: var(--primary); border: 2px solid var(--primary); }

/* 卡片 */
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 24px;
}

/* ============================================================
   识字模块 —— 帮小青蛙回家
   ============================================================ */
.frog-game {
  text-align: center;
}
.frog-pond {
  position: relative;
  width: 100%;
  max-width: 700px;
  height: 320px;
  margin: 20px auto;
  background: linear-gradient(180deg, #a8e6cf 0%, #88d8a0 50%, #6ab04c 100%);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: inset 0 0 30px rgba(0,0,0,0.1);
}
.pond-water {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(180deg, #4fc3f7, #29b6f6);
  opacity: 0.5;
}
.lily-pad {
  position: absolute;
  width: 90px;
  height: 90px;
  background: radial-gradient(circle at 40% 40%, #66bb6a, #43a047);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}
.lily-pad::before {
  content: '';
  position: absolute;
  top: 5px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(255,255,255,0.3), transparent 60%);
}
.lily-pad:hover { transform: scale(1.1); }
.lily-pad.correct {
  background: radial-gradient(circle at 40% 40%, #66bb6a, #2e7d32);
  animation: bounce 0.5s ease;
}
.lily-pad.wrong {
  background: radial-gradient(circle at 40% 40%, #ef5350, #c62828);
  animation: shake 0.4s ease;
}

.frog-character {
  position: absolute;
  font-size: 40px;
  transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 10;
  filter: drop-shadow(2px 4px 6px rgba(0,0,0,0.3));
}

.frog-home {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 50px;
  z-index: 5;
}

.frog-question {
  text-align: center;
  margin: 16px 0;
}
.frog-question .listen-btn {
  font-size: 24px;
  padding: 12px 32px;
}
.frog-info {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 12px 0;
  font-size: 16px;
  color: var(--text-light);
}
.frog-info span { font-weight: 700; color: var(--text-dark); }

@keyframes bounce {
  0%,100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

/* ============================================================
   算术模块
   ============================================================ */
.math-game { text-align: center; }
.math-question {
  font-size: 56px;
  font-weight: 800;
  color: var(--primary);
  margin: 30px 0;
  letter-spacing: 4px;
}
.math-answers {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  max-width: 500px;
  margin: 0 auto 24px;
}
.math-answer {
  background: #fff;
  border: 3px solid #e9ecef;
  border-radius: var(--radius);
  padding: 24px;
  font-size: 36px;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text-dark);
}
.math-answer:hover { border-color: var(--primary-light); transform: scale(1.05); }
.math-answer.correct { background: var(--success); color: #fff; border-color: var(--success); animation: bounce 0.4s ease; }
.math-answer.wrong { background: var(--danger); color: #fff; border-color: var(--danger); animation: shake 0.4s ease; }
.math-answer.disabled { opacity: 0.5; pointer-events: none; }

.math-stats {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 20px;
  font-size: 18px;
}
.math-stats .stat-box {
  background: #fff;
  padding: 8px 24px;
  border-radius: 30px;
  box-shadow: var(--card-shadow);
  font-weight: 700;
}

/* ============================================================
   英语模块
   ============================================================ */
.english-game { text-align: center; }
.english-question-area {
  margin: 20px 0 30px;
}
.english-listen-btn {
  font-size: 22px;
  padding: 16px 40px;
  border-radius: 50px;
}
.english-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 600px;
  margin: 0 auto;
}
.english-card {
  background: #fff;
  border: 4px solid #e9ecef;
  border-radius: var(--radius);
  padding: 30px 20px;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.english-card:hover { border-color: var(--primary-light); transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.english-card .emoji {
  font-size: 74px;
  line-height: 1;
}
.english-card .label {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-light);
  min-height: 24px;
}
.english-card.correct {
  background: #d4edda;
  border-color: var(--success);
  animation: bounce 0.5s ease;
}
.english-card.correct .label { color: var(--success); }
.english-card.wrong {
  background: #f8d7da;
  border-color: var(--danger);
  animation: shake 0.4s ease;
}
.english-card.disabled { opacity: 0.5; pointer-events: none; }

.english-feedback {
  margin-top: 20px;
  font-size: 20px;
  font-weight: 700;
  min-height: 30px;
}
.english-feedback.success { color: var(--success); }
.english-feedback.error { color: var(--danger); }

/* ============================================================
   口语模块
   ============================================================ */
.oral-categories {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.oral-cat-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--card-shadow);
  border: 3px solid transparent;
}
.oral-cat-card:hover { border-color: var(--primary-light); transform: translateY(-4px); }
.oral-cat-card.active { border-color: var(--primary); background: #f0edff; }
.oral-cat-card .cat-icon { font-size: 40px; }
.oral-cat-card .cat-name { font-size: 16px; font-weight: 700; margin-top: 8px; color: var(--text-dark); }

.oral-practice {
  margin-top: 20px;
}
.oral-item {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--card-shadow);
  gap: 16px;
}
.oral-item .oral-text { flex: 1; }
.oral-item .oral-en { font-size: 20px; font-weight: 700; color: var(--primary); }
.oral-item .oral-cn { font-size: 15px; color: var(--text-light); margin-top: 4px; }
.oral-item .oral-type {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 600;
  white-space: nowrap;
}
.oral-type.短语 { background: #e3f2fd; color: #1976d2; }
.oral-type.模仿 { background: #fff3e0; color: #f57c00; }
.oral-type.问答 { background: #f3e5f5; color: #7b1fa2; }

.oral-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 22px;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.oral-btn:hover { transform: scale(1.1); }
.oral-btn.repeat { background: var(--success); }

/* ============================================================
   亲子英语口语模块
   ============================================================ */
.dailyspeak-container {
  max-width: 700px;
  margin: 0 auto;
}

/* 今日一句卡片 */
.ds-today-card {
  background: linear-gradient(135deg, #fff8e1 0%, #fff3e0 50%, #ffe0b2 100%);
  border: 3px solid #ffb74d;
  border-radius: 24px;
  padding: 28px 24px;
  text-align: center;
  position: relative;
  margin-bottom: 20px;
  box-shadow: 0 4px 20px rgba(255,152,0,0.15);
}
.ds-day-badge {
  display: inline-block;
  background: linear-gradient(135deg, #ff9800, #f57c00);
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  padding: 4px 18px;
  border-radius: 20px;
  margin-bottom: 10px;
}
.ds-scene-tag {
  display: inline-block;
  background: #fff;
  color: #5d4037;
  font-size: 14px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 16px;
  margin-bottom: 16px;
  margin-left: 8px;
}
.ds-en-big {
  font-size: 28px;
  font-weight: 800;
  color: #e65100;
  margin: 12px 0;
  line-height: 1.4;
  text-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.ds-cn-big {
  font-size: 20px;
  color: #5d4037;
  margin-bottom: 12px;
  font-weight: 600;
}
.ds-tip {
  background: rgba(255,255,255,0.7);
  border-radius: 12px;
  padding: 10px 16px;
  font-size: 14px;
  color: #6d4c41;
  margin-bottom: 16px;
  text-align: left;
  line-height: 1.6;
}
.ds-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}
.ds-done-btn.completed {
  background: var(--success) !important;
  border-color: var(--success) !important;
}

/* 跟读练习 */
.ds-practice-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--card-shadow);
  text-align: center;
}
.ds-practice-card h3 {
  font-size: 20px;
  color: var(--text-dark);
  margin-bottom: 4px;
}
.ds-read-steps {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin: 20px 0;
}
.ds-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  opacity: 0.4;
  transition: all 0.3s;
}
.ds-step.active {
  opacity: 1;
  transform: scale(1.1);
}
.ds-step.done {
  opacity: 1;
}
.ds-step.done .ds-step-num {
  background: var(--success);
}
.ds-step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}
.ds-step-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
}

/* 练习统计 */
.ds-stats-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--card-shadow);
}
.ds-stats-card h3 {
  font-size: 20px;
  color: var(--text-dark);
  margin-bottom: 16px;
}
.ds-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}
.ds-stat-item {
  text-align: center;
  background: #f5f5f5;
  border-radius: var(--radius-sm);
  padding: 16px 8px;
}
.ds-stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
}
.ds-stat-label {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 4px;
}
.ds-progress-track {
  width: 100%;
  height: 14px;
  background: #e0e0e0;
  border-radius: 7px;
  overflow: hidden;
}
.ds-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #ff9800, #f57c00);
  border-radius: 7px;
  transition: width 0.5s ease;
}

/* 按场景浏览 */
.ds-browse-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--card-shadow);
}
.ds-browse-card h3 {
  font-size: 20px;
  color: var(--text-dark);
  margin-bottom: 16px;
}
.ds-scene-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.ds-scene-tab {
  background: #f5f5f5;
  border: 2px solid transparent;
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  transition: all 0.2s;
}
.ds-scene-tab:hover {
  background: #fff3e0;
}
.ds-scene-tab.active {
  background: #fff3e0;
  border-color: #ff9800;
  color: #e65100;
}
.ds-sentence-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-bottom: 1px solid #f0f0f0;
  transition: background 0.2s;
}
.ds-sentence-row:hover {
  background: #fafafa;
}
.ds-sentence-row:last-child {
  border-bottom: none;
}
.ds-row-en {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-dark);
}
.ds-row-cn {
  font-size: 14px;
  color: var(--text-light);
  min-width: 120px;
}

/* ============================================================
   SSS 儿歌模块
   ============================================================ */
.songs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.song-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all 0.2s ease;
  cursor: pointer;
}
.song-card:hover { transform: translateY(-6px); box-shadow: 0 10px 30px rgba(0,0,0,0.15); }
.song-thumb {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 60px;
  background: linear-gradient(135deg, #a8edea, #fed6e3);
}
.song-card:nth-child(3n) .song-thumb { background: linear-gradient(135deg, #ffd3a5, #fd6585); }
.song-card:nth-child(3n+1) .song-thumb { background: linear-gradient(135deg, #c2e9fb, #a1c4fd); }
.song-card:nth-child(3n+2) .song-thumb { background: linear-gradient(135deg, #fbc2eb, #a6c1ee); }
.song-info { padding: 16px; }
.song-title { font-size: 16px; font-weight: 700; color: var(--text-dark); }
.song-desc { font-size: 13px; color: var(--text-light); margin-top: 4px; }

/* 视频弹窗 */
.video-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  animation: fadeIn 0.3s ease;
}
.video-modal-content {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  max-width: 800px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}
.video-modal-content iframe {
  width: 100%;
  height: 420px;
  border: none;
  border-radius: var(--radius-sm);
}

/* 歌词区域 */
.song-lyrics-box {
  margin-top: 20px;
  background: #fffef5;
  border: 2px solid #ffe082;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  max-height: 250px;
  overflow-y: auto;
}
.lyric-line {
  font-size: 16px;
  line-height: 2;
  color: #5d4037;
  transition: all 0.3s ease;
  cursor: pointer;
  border-radius: 6px;
  padding: 2px 6px;
}
.lyric-line:hover { background: #fff3e0; }

.song-actions-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.song-player-area { position: relative; }
.song-player-tip {
  text-align: center;
  font-size: 13px;
  color: var(--text-light);
  margin-top: 8px;
  padding: 6px;
  background: #fff3e0;
  border-radius: 8px;
}
.video-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 32px;
  color: #fff;
  cursor: pointer;
  background: rgba(0,0,0,0.5);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ============================================================
   古诗模块
   ============================================================ */
.poems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.poem-card {
  background: linear-gradient(135deg, #fffef5, #fff8e1);
  border: 2px solid #e8d5b7;
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  transition: all 0.2s ease;
  box-shadow: var(--card-shadow);
}
.poem-card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px rgba(0,0,0,0.12); }
.poem-card::before {
  content: '📜';
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 24px;
  opacity: 0.3;
}
.poem-title { font-size: 22px; font-weight: 800; color: #5d4037; text-align: center; }
.poem-author { font-size: 14px; color: #8d6e63; text-align: center; margin: 6px 0 16px; }
.poem-text {
  font-size: 18px;
  line-height: 2;
  color: #4e342e;
  text-align: center;
  letter-spacing: 2px;
  font-family: "STKaiti","KaiTi",serif;
}
.poem-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
}
.poem-btn {
  border: none;
  border-radius: 30px;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}
.poem-btn.read { background: #ff9800; color: #fff; }
.poem-btn.follow { background: #4caf50; color: #fff; }
.poem-btn:hover { transform: scale(1.05); }
.poem-btn.reciting { background: #f44336; animation: pulse 1s infinite; }

@keyframes pulse {
  0%,100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* 跟读状态 */
.follow-status {
  text-align: center;
  padding: 12px;
  background: #e8f5e9;
  border-radius: var(--radius-sm);
  margin-top: 12px;
  font-size: 15px;
  font-weight: 600;
  color: #2e7d32;
  display: none;
}
.follow-status.show { display: block; }

/* ============================================================
   宠物模块
   ============================================================ */
.pet-container {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}
.pet-scene {
  background: linear-gradient(180deg, #e3f2fd 0%, #fff3e0 35%, #ffe0b2 60%, #ffcc80 80%, #ffb74d 100%);
  border-radius: 24px;
  padding: 40px 20px 30px;
  position: relative;
  overflow: hidden;
  margin-bottom: 24px;
  min-height: 300px;
  cursor: pointer;
}
.pet-scene::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(180deg, #81c784, #66bb6a);
  border-radius: 50% 50% 0 0 / 20% 20% 0 0;
}

/* 背景装饰 */
.pet-bg-sun {
  position: absolute;
  top: 12px;
  right: 20px;
  font-size: 36px;
  animation: sunGlow 3s ease-in-out infinite;
  z-index: 1;
}
@keyframes sunGlow {
  0%,100% { transform: scale(1) rotate(0deg); opacity: 0.9; }
  50% { transform: scale(1.15) rotate(15deg); opacity: 1; }
}
.pet-bg-cloud {
  position: absolute;
  font-size: 28px;
  z-index: 1;
  opacity: 0.7;
}
.pet-cloud-1 {
  top: 18px;
  left: 15%;
  animation: cloudFloat 12s ease-in-out infinite;
}
.pet-cloud-2 {
  top: 30px;
  left: 55%;
  animation: cloudFloat 15s ease-in-out infinite reverse;
  font-size: 22px;
}
@keyframes cloudFloat {
  0%,100% { transform: translateX(0); }
  50% { transform: translateX(30px); }
}
.pet-bg-butterfly {
  position: absolute;
  font-size: 20px;
  z-index: 1;
}
.pet-butterfly-1 {
  top: 50px;
  left: 20%;
  animation: butterflyFly 8s ease-in-out infinite;
}
.pet-butterfly-2 {
  top: 70px;
  right: 25%;
  animation: butterflyFly 10s ease-in-out infinite reverse;
  font-size: 16px;
}
@keyframes butterflyFly {
  0% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(20px, -15px) rotate(10deg); }
  50% { transform: translate(40px, 0) rotate(-5deg); }
  75% { transform: translate(20px, 15px) rotate(5deg); }
  100% { transform: translate(0, 0) rotate(0deg); }
}
.pet-bg-flower {
  position: absolute;
  bottom: 50px;
  z-index: 1;
  font-size: 20px;
  animation: flowerSway 4s ease-in-out infinite;
}
.pet-flower-1 { left: 10%; animation-delay: 0s; }
.pet-flower-2 { left: 75%; animation-delay: 1s; font-size: 18px; }
.pet-flower-3 { left: 45%; animation-delay: 2s; font-size: 16px; }
@keyframes flowerSway {
  0%,100% { transform: rotate(-5deg); }
  50% { transform: rotate(5deg); }
}

/* 想法气泡 */
.pet-thought-bubble {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  border-radius: 20px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 700;
  color: #5d4037;
  box-shadow: 0 3px 12px rgba(0,0,0,0.1);
  z-index: 5;
  transition: all 0.3s;
  white-space: nowrap;
  max-width: 80%;
}
.pet-thought-bubble::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 8px solid #fff;
}
.pet-thought-bubble.pop {
  animation: bubblePop 0.3s ease;
}
@keyframes bubblePop {
  0% { transform: translateX(-50%) scale(0.8); }
  50% { transform: translateX(-50%) scale(1.15); }
  100% { transform: translateX(-50%) scale(1); }
}

/* 猫咪主体 */
.pet-emoji {
  font-size: 100px;
  position: relative;
  z-index: 2;
  transition: all 0.3s ease;
  display: inline-block;
  animation: petBreath 3s ease-in-out infinite;
  cursor: pointer;
  user-select: none;
}
.pet-emoji.happy { animation: happyBounce 1s ease infinite; }
.pet-emoji.hungry { animation: sadShake 2s ease infinite; }
.pet-emoji.gone { opacity: 0.2; filter: grayscale(1); animation: petBreath 4s ease-in-out infinite; }

/* 呼吸动画——默认待机 */
@keyframes petBreath {
  0%,100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-3px) scale(1.02); }
}

/* 各种特效动画 */
@keyframes happyBounce {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
@keyframes sadShake {
  0%,100% { transform: rotate(0); }
  25% { transform: rotate(-3deg); }
  75% { transform: rotate(3deg); }
}

/* 喂食动画 */
.pet-emoji.effect-feed {
  animation: petEat 0.5s ease 3 !important;
}
@keyframes petEat {
  0%,100% { transform: scale(1) rotate(0deg); }
  25% { transform: scale(1.1) rotate(-5deg); }
  75% { transform: scale(1.1) rotate(5deg); }
}

/* 玩球动画 */
.pet-emoji.effect-play {
  animation: petPlay 0.6s ease 3 !important;
}
@keyframes petPlay {
  0%,100% { transform: translateY(0) rotate(0deg); }
  25% { transform: translateY(-20px) rotate(-10deg); }
  75% { transform: translateY(-20px) rotate(10deg); }
}

/* 弹跳 */
.pet-emoji.effect-bounce {
  animation: petBounce 0.4s ease 4 !important;
}
@keyframes petBounce {
  0%,100% { transform: translateY(0) scale(1); }
  30% { transform: translateY(-30px) scale(0.9); }
  50% { transform: translateY(-35px) scale(1.05); }
  70% { transform: translateY(-15px) scale(0.95); }
}

/* 打滚 */
.pet-emoji.effect-roll {
  animation: petRoll 0.8s ease 2 !important;
}
@keyframes petRoll {
  0% { transform: rotate(0deg) translateY(0); }
  25% { transform: rotate(90deg) translateY(5px); }
  50% { transform: rotate(180deg) translateY(0); }
  75% { transform: rotate(270deg) translateY(5px); }
  100% { transform: rotate(360deg) translateY(0); }
}

/* 爱心 */
.pet-emoji.effect-heart {
  animation: petHeart 0.6s ease 2 !important;
}
@keyframes petHeart {
  0%,100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

/* 转圈 */
.pet-emoji.effect-spin {
  animation: petSpin 0.5s ease 3 !important;
}
@keyframes petSpin {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(0.9); }
  100% { transform: rotate(360deg) scale(1); }
}

/* 抖动 */
.pet-emoji.effect-shake {
  animation: petShake 0.15s ease 8 !important;
}
@keyframes petShake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

/* 跳高 */
.pet-emoji.effect-jump {
  animation: petJump 0.6s ease 2 !important;
}
@keyframes petJump {
  0%,100% { transform: translateY(0) scale(1); }
  40% { transform: translateY(-50px) scale(0.85); }
  50% { transform: translateY(-55px) scale(1.05); }
}

/* 摸头 */
.pet-emoji.effect-pat {
  animation: petPat 0.5s ease 3 !important;
}
@keyframes petPat {
  0%,100% { transform: scale(1) translateY(0); }
  50% { transform: scale(0.95) translateY(5px); }
}

/* 翻跟头 */
.pet-emoji.effect-flip {
  animation: petFlip 0.8s ease 2 !important;
}
@keyframes petFlip {
  0% { transform: perspective(400px) rotateX(0deg); }
  50% { transform: perspective(400px) rotateX(180deg) scale(0.8); }
  100% { transform: perspective(400px) rotateX(360deg); }
}

/* 装死 */
.pet-emoji.effect-dead {
  animation: petDead 0.5s ease forwards !important;
}
@keyframes petDead {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(90deg) translateY(10px); opacity: 0.6; }
}

/* 握手 */
.pet-emoji.effect-shake-paw {
  animation: petShakePaw 0.4s ease 3 !important;
}
@keyframes petShakePaw {
  0%,100% { transform: rotate(0deg) translateY(0); }
  50% { transform: rotate(-15deg) translateY(-10px); }
}

/* 卖萌 */
.pet-emoji.effect-cute {
  animation: petCute 0.3s ease 4 !important;
}
@keyframes petCute {
  0%,100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

/* 特效粒子 */
.pet-effect-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
  pointer-events: none;
}
.pet-particle {
  position: absolute;
  top: 30%;
  font-size: 24px;
  animation: particleRise 2s ease-out forwards;
  pointer-events: none;
}
@keyframes particleRise {
  0% { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-80px) scale(1.5) rotate(20deg); }
}

.pet-name {
  font-size: 24px;
  font-weight: 800;
  color: #5d4037;
  margin-top: 8px;
  position: relative;
  z-index: 2;
}
.pet-level-badge {
  display: inline-block;
  margin-top: 6px;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #6c5ce7, #a29bfe);
  position: relative;
  z-index: 2;
  box-shadow: 0 3px 10px rgba(108,92,231,0.4);
}
.pet-mood {
  font-size: 16px;
  color: #6d4c41;
  margin-top: 6px;
  position: relative;
  z-index: 2;
}

/* 彩色进度条 */
.pet-bars {
  margin-bottom: 16px;
}
.pet-bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
}
.pet-bar-label {
  width: 90px;
  text-align: right;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark);
  flex-shrink: 0;
}
.pet-bar-track {
  flex: 1;
  height: 26px;
  background: #e9ecef;
  border-radius: 13px;
  overflow: hidden;
  position: relative;
}
.pet-bar-fill {
  height: 100%;
  border-radius: 13px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  min-width: 40px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.pet-bar-num {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  font-weight: 800;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* 今天学什么 */
.pet-today {
  text-align: left;
  margin-top: 16px;
}
.pet-today-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.pet-today-header h3 { margin: 0; }
.pet-today-progress {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  background: #f0edff;
  padding: 4px 12px;
  border-radius: 20px;
}
.recommend-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.recommend-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #f8f9ff;
  border: 2px solid #e9ecef;
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.recommend-card:hover {
  border-color: var(--primary);
  transform: translateX(6px);
  background: #f0edff;
}
.recommend-icon { font-size: 36px; flex-shrink: 0; }
.recommend-info { flex: 1; }
.recommend-name { font-size: 17px; font-weight: 700; color: var(--text-dark); }
.recommend-desc { font-size: 13px; color: var(--text-light); margin-top: 2px; }
.recommend-go {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  flex-shrink: 0;
}
.recommend-all-done {
  text-align: center;
  padding: 20px;
  font-size: 18px;
  font-weight: 700;
  color: var(--success);
  background: #f0fff4;
  border-radius: var(--radius-sm);
}

.pet-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.pet-message {
  background: #fff;
  border-radius: var(--radius);
  padding: 16px 24px;
  margin-top: 16px;
  box-shadow: var(--card-shadow);
  font-size: 16px;
  color: var(--text-dark);
  line-height: 1.8;
}

.pet-checkin {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 16px;
  box-shadow: var(--card-shadow);
}
.pet-checkin h3 { font-size: 18px; margin-bottom: 12px; color: var(--text-dark); }
  gap: 8px;
}
.checkin-day {
  aspect-ratio: 1;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  background: #f0f0f0;
  color: var(--text-light);
}
.checkin-day.done { background: var(--success); color: #fff; }
.checkin-day.today { border: 3px solid var(--primary); }
.checkin-day.future { opacity: 0.4; }

.unlock-pets {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
  flex-wrap: wrap;
}
.locked-pet {
  text-align: center;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: #f5f5f5;
  opacity: 0.5;
}
.locked-pet .pet-icon { font-size: 48px; filter: grayscale(1); }
.locked-pet .lock-info { font-size: 13px; color: var(--text-light); margin-top: 4px; }
.locked-pet.unlocked { opacity: 1; background: #e8f5e9; cursor: pointer; }
.locked-pet.unlocked .pet-icon { filter: none; }

/* ============================================================
   每日打卡模块
   ============================================================ */
.checkin-summary {
  text-align: center;
}
.checkin-summary-row {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.checkin-summary-item {
  text-align: center;
  min-width: 80px;
}
.csi-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
}
.csi-label {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 2px;
}
.checkin-all-done {
  background: linear-gradient(135deg, #ffeaa7, #fdcb6e);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 18px;
  font-weight: 700;
  color: #6c5ce7;
  margin-top: 8px;
}
.checkin-encourage {
  background: #e8f5e9;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  color: #2e7d32;
  margin-top: 8px;
}

.checkin-modules {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.checkin-module-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--card-shadow);
  cursor: pointer;
  transition: all 0.2s ease;
  border: 3px solid transparent;
}
.checkin-module-card:hover {
  transform: translateX(6px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}
.checkin-module-card.done {
  border-color: var(--success);
  background: #f0fff4;
}
.checkin-module-card.almost {
  border-color: var(--warning);
  background: #fffef5;
}
.checkin-module-icon {
  font-size: 36px;
  flex-shrink: 0;
}
.checkin-module-info {
  flex: 1;
}
.checkin-module-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
}
.checkin-module-desc {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 2px;
}
.checkin-module-status {
  flex-shrink: 0;
}
.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
}
.badge-done { background: #d4edda; color: #155724; }
.badge-almost { background: #fff3cd; color: #856404; }
.badge-todo { background: #f0f0f0; color: #999; }

/* 打卡日历 */
.checkin-calendar-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 6px;
  padding: 8px 0;
}
.cal-day {
  aspect-ratio: 1;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  background: #f0f0f0;
  color: var(--text-light);
  transition: all 0.2s ease;
}
.cal-day.cal-done {
  background: var(--success);
  color: #fff;
}
.cal-day.cal-today {
  border: 2px solid var(--primary);
  font-weight: 800;
}

/* 打卡奖励 */
.checkin-rewards {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.checkin-reward {
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  text-align: center;
  box-shadow: var(--card-shadow);
  position: relative;
  flex: 1;
  min-width: 100px;
  opacity: 0.5;
  transition: all 0.2s ease;
}
.checkin-reward.unlocked {
  opacity: 1;
  background: linear-gradient(135deg, #fff9c4, #fff176);
}
.reward-icon { font-size: 36px; }
.reward-days { font-size: 14px; font-weight: 700; color: var(--text-dark); margin-top: 4px; }
.reward-name { font-size: 12px; color: var(--text-light); margin-top: 2px; }
.reward-check {
  position: absolute;
  top: 6px;
  right: 8px;
  font-size: 16px;
}

/* 打卡导航高亮 */
.nav-item.checkin-nav {
  background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
  border-radius: var(--radius-sm);
}
.nav-item.checkin-nav.active {
  background: linear-gradient(135deg, #66bb6a, #43a047);
  color: #fff;
}

/* ============================================================
   每日任务进度提醒条
   ============================================================ */
.daily-progress-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, #e8f5e9 0%, #fff8e1 100%);
  border: 2px solid #c8e6c9;
  border-radius: 16px;
  padding: 10px 18px;
  margin: 12px 0 16px;
  font-size: 14px;
}
.dpb-left {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.dpb-label {
  font-weight: 700;
  color: var(--text-dark);
}
.dpb-cur {
  background: #fff3e0;
  color: #e65100;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 13px;
}
.dpb-cur.done {
  background: #e8f5e9;
  color: #2e7d32;
}
.dpb-track {
  flex: 1;
  height: 12px;
  background: #e0e0e0;
  border-radius: 6px;
  overflow: hidden;
  min-width: 80px;
}
.dpb-fill {
  height: 100%;
  background: linear-gradient(90deg, #66bb6a, #43a047);
  border-radius: 6px;
  transition: width 0.5s ease;
}
.dpb-fill.full {
  background: linear-gradient(90deg, #43a047, #2e7d32);
}
.dpb-right {
  white-space: nowrap;
  color: var(--text-light);
  font-size: 13px;
}
.dpb-right strong {
  color: var(--primary);
  font-size: 15px;
}

/* ============================================================
   首页欢迎
   ============================================================ */
.welcome {
  text-align: center;
  padding: 40px 20px;
}
.welcome h1 {
  font-size: 36px;
  background: linear-gradient(135deg, #6c5ce7, #ff6b6b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}
.welcome p {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 32px;
}
.welcome-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
}
.welcome-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--card-shadow);
}
.welcome-card:hover { transform: translateY(-6px); box-shadow: 0 10px 30px rgba(0,0,0,0.12); }
.welcome-card .wc-icon { font-size: 48px; }
.welcome-card .wc-title { font-size: 18px; font-weight: 700; margin-top: 12px; color: var(--text-dark); }
.welcome-card .wc-desc { font-size: 13px; color: var(--text-light); margin-top: 6px; }

/* ============================================================
   浮动积分动画 & 提示
   ============================================================ */
#floatContainer {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 9999;
}
.float-score {
  position: absolute;
  font-size: 28px;
  font-weight: 800;
  color: var(--warning);
  text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
  animation: floatUp 1.5s ease forwards;
}
@keyframes floatUp {
  0% { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-80px) scale(1.5); }
}

.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: rgba(45,52,54,0.95);
  color: #fff;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  z-index: 10000;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .sidebar { width: 80px; }
  .nav-label { display: none; }
  .nav-icon { font-size: 28px; }
  .content { padding: 16px; }
  .english-cards, .math-answers { grid-template-columns: repeat(2, 1fr); }
}