/* ============================================================
   感觉训练系统 — 全局样式
   风格：奶白马卡龙 · 液态玻璃 · iOS 26 图标
   ============================================================ */

/* ===== 1. 基础重置 ===== */
*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family:
    -apple-system, BlinkMacSystemFont,
    'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', 'Noto Sans CJK SC',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== 2. 动态流动背景渐变 ===== */
body {
  background: linear-gradient(145deg, #FFF0F8, #F2EEFF, #EAF5FF, #EEFFF8);
  animation: bgShift 16s ease-in-out infinite alternate;
  background-size: 300% 300%;
}

@keyframes bgShift {
  0%   { background: linear-gradient(145deg, #FFF0F8 0%, #F2EEFF 30%, #EAF5FF 60%, #EEFFF8 100%); }
  25%  { background: linear-gradient(165deg, #FFF8EE 0%, #F5F0FF 35%, #EDF8FF 65%, #F0FFF8 100%); }
  50%  { background: linear-gradient(200deg, #F5EEFF 0%, #EAFAF0 30%, #FFF0F5 60%, #EEF4FF 100%); }
  75%  { background: linear-gradient(120deg, #EDFFF5 0%, #FFF0F0 35%, #F0EEFF 65%, #FFFAEA 100%); }
  100% { background: linear-gradient(155deg, #FFF0F8 0%, #EEF0FF 35%, #F0FAFF 65%, #FFFFF2 100%); }
}

/* ===== 3. 背景装饰光晕球 ===== */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}

.bg-orb-1 {
  width: 340px; height: 340px;
  top: -110px; right: -90px;
  background: radial-gradient(circle, #F9A8D4 0%, #E879A4 55%, transparent 100%);
  opacity: 0.38;
  animation: floatOrb 9s ease-in-out infinite;
}

.bg-orb-2 {
  width: 270px; height: 270px;
  top: 38%; left: -85px;
  background: radial-gradient(circle, #C4B5FD 0%, #A78BFA 55%, transparent 100%);
  opacity: 0.32;
  animation: floatOrb 12s ease-in-out infinite reverse 1s;
}

.bg-orb-3 {
  width: 210px; height: 210px;
  bottom: 130px; right: -55px;
  background: radial-gradient(circle, #86EFAC 0%, #34D399 55%, transparent 100%);
  opacity: 0.28;
  animation: floatOrb 8s ease-in-out infinite 2.5s;
}

@keyframes floatOrb {
  0%, 100% { transform: translateY(0) scale(1); }
  50%       { transform: translateY(-22px) scale(1.06); }
}

/* ===== 4. 马卡龙渐变色系（保留用于关卡大卡片） ===== */
.macaron-rose {
  background: linear-gradient(140deg, #FFB7C5 0%, #FF8FAE 55%, #FF6E9A 100%);
}
.macaron-lavender {
  background: linear-gradient(140deg, #CAB8FF 0%, #A99CFF 55%, #8B7EFF 100%);
}
.macaron-mint {
  background: linear-gradient(140deg, #A6F0C4 0%, #78E4A5 55%, #52D888 100%);
}
.macaron-peach {
  background: linear-gradient(140deg, #FFD4A6 0%, #FFB876 55%, #FF9E50 100%);
}
.macaron-sky {
  background: linear-gradient(140deg, #A6D8FF 0%, #76BEFF 55%, #50A8FF 100%);
}
.macaron-lemon {
  background: linear-gradient(140deg, #FFF6A6 0%, #FFEC76 55%, #FFE050 100%);
}
.macaron-coral {
  background: linear-gradient(140deg, #FFB8A8 0%, #FF8F78 55%, #FF6E58 100%);
}
.macaron-lilac {
  background: linear-gradient(140deg, #DFA8FF 0%, #C478FF 55%, #AA54FF 100%);
}
.macaron-teal {
  background: linear-gradient(140deg, #A6EEFA 0%, #76DCED 55%, #50C8D8 100%);
}
.macaron-cherry {
  background: linear-gradient(140deg, #FFB8D6 0%, #FF78AA 55%, #FF5095 100%);
}

/* ===== 5. 液态玻璃卡片 ===== */
.glass-card {
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.88);
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
}

/* ===== 6. 关卡卡片 —— 已解锁（保留彩色渐变大卡片） ===== */
.lesson-card-unlocked {
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow:
    0 10px 36px rgba(0, 0, 0, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.60);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition:
    transform 0.22s cubic-bezier(0.34, 1.4, 0.64, 1),
    box-shadow 0.22s ease;
  -webkit-tap-highlight-color: transparent;
}
/* 聚光灯边框效果 */
.lesson-card-unlocked::before {
  content: '';
  position: absolute;
  inset: -1.5px;
  border-radius: calc(2rem + 2px);
  padding: 1.5px;
  background: radial-gradient(
    180px 180px at var(--mx, 50%) var(--my, 50%),
    rgba(255, 255, 255, 0.90) 0%,
    rgba(255, 255, 255, 0.40) 40%,
    transparent 70%
  );
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 1;
}
.lesson-card-unlocked:hover::before { opacity: 1; }
.lesson-card-unlocked:active {
  transform: scale(0.97) !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.10) !important;
}

/* ===== 7. 关卡卡片 —— 已锁定 ===== */
.lesson-card-locked {
  background: rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  cursor: not-allowed;
}

/* ===== 8. 关卡卡片入场动画 ===== */
.lesson-card-wrap {
  opacity: 0;
  transform: translateY(28px) scale(0.97);
  animation: cardSlideUp 0.52s cubic-bezier(0.34, 1.46, 0.64, 1) forwards;
}

@keyframes cardSlideUp {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ===== 9. 关卡连接路径 ===== */
.path-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 2px 0;
}
.path-connector .path-line {
  width: 2px;
  height: 16px;
  border-radius: 2px;
}
.path-connector .path-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.6);
}
.path-connector.unlocked .path-line { background: rgba(167, 139, 250, 0.50); }
.path-connector.unlocked .path-dot  { background: rgba(167, 139, 250, 0.60); }
.path-connector.locked   .path-line { background: rgba(200, 190, 220, 0.35); }
.path-connector.locked   .path-dot  { background: rgba(200, 190, 220, 0.45); }

/* ===== 10. 底部导航栏 ===== */
.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 18px;
  border: none;
  background: transparent;
  cursor: pointer;
  color: #C4B5E8;
  font-size: 10px;
  font-weight: 600;
  min-width: 58px;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.nav-item .nav-icon-wrap {
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(167, 139, 250, 0.07);
  border: 1px solid rgba(167, 139, 250, 0.14);
  transition:
    background 0.25s ease,
    box-shadow 0.25s ease,
    transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

.nav-item .nav-icon-wrap svg {
  width: 21px; height: 21px;
  stroke: #C4B5E8;
  transition: stroke 0.2s ease;
}

/* 激活状态 */
.nav-item.active { color: #6D28D9; }

.nav-item.active .nav-icon-wrap {
  background: linear-gradient(145deg,
    rgba(196, 170, 255, 0.72) 0%,
    rgba(139, 92, 246, 0.85) 50%,
    rgba(196, 80, 200, 0.68) 100%
  );
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow:
    0 5px 18px rgba(139, 92, 246, 0.38),
    0 2px 6px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.50);
  transform: scale(1.08) translateY(-3px);
}

/* iOS 26 顶部弧形高光 */
.nav-item.active .nav-icon-wrap::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%; height: 44%;
  background: linear-gradient(to bottom, rgba(255,255,255,0.42) 0%, transparent 100%);
  border-radius: 14px 14px 60% 60%;
  pointer-events: none;
}

.nav-item.active .nav-icon-wrap svg {
  stroke: #ffffff;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.18));
}

/* 即将上线状态（魔法机器临时锁）—— 整组移除即可恢复 */
.nav-item.nav-coming-soon { opacity: 0.55; }
.nav-item.nav-coming-soon .nav-icon-wrap {
  background: rgba(180, 180, 195, 0.10);
  border-color: rgba(180, 180, 195, 0.18);
}
.nav-item.nav-coming-soon .nav-icon-wrap svg { stroke: #B8B0C8; }
.nav-item.nav-coming-soon .nav-soon-badge {
  position: absolute;
  top: -6px; right: -14px;
  padding: 1px 6px;
  border-radius: 8px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  background: linear-gradient(135deg, #FBA5C0 0%, #C084FC 100%);
  box-shadow: 0 2px 6px rgba(192, 132, 252, 0.35);
  white-space: nowrap;
  pointer-events: none;
}

/* ===== 11. Safe area ===== */
.safe-area-pb {
  padding-bottom: max(8px, env(safe-area-inset-bottom));
}

/* ===== 12. 进度条 ===== */
.progress-bar-track {
  height: 7px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.30);
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.85);
  transition: width 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.60);
}

/* ===== 13. 星星评分 ===== */
.star-filled { color: #FBBF24; }
.star-empty  { color: rgba(255, 255, 255, 0.30); }

/* ===== 14. 开始按钮 ===== */
.btn-start {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 18px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.30);
  border: 1.5px solid rgba(255, 255, 255, 0.60);
  color: rgba(255, 255, 255, 0.96);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  cursor: pointer;
  transition: background 0.18s ease, transform 0.18s ease;
  -webkit-tap-highlight-color: transparent;
}
.btn-start:hover  { background: rgba(255, 255, 255, 0.45); }
.btn-start:active { transform: scale(0.95); }

/* ===== 15. Toast ===== */
.toast-item {
  padding: 10px 22px;
  border-radius: 24px;
  background: rgba(30, 20, 60, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.18);
  opacity: 0;
  transform: translateY(-10px) scale(0.94);
  transition: opacity 0.26s ease, transform 0.26s cubic-bezier(0.34, 1.4, 0.64, 1);
  pointer-events: none;
  white-space: nowrap;
}
.toast-item.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* ===== 16. 滚动条 ===== */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(139, 92, 246, 0.20);
  border-radius: 99px;
}

/* ===== 17. 总进度卡片 ===== */
.overall-progress-card {
  background: linear-gradient(135deg,
    rgba(167, 139, 250, 0.78) 0%,
    rgba(236, 72, 153, 0.68) 100%);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.50);
  box-shadow:
    0 8px 30px rgba(139, 92, 246, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

/* ===== 18. iOS 26 液态玻璃图标（通用）===== */
.ios-icon {
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}
.ios-icon .ios-icon-bg {
  position: absolute; inset: 0; border-radius: inherit;
}
.ios-icon .ios-icon-glass {
  position: absolute; inset: 0; border-radius: inherit;
  background: rgba(255, 255, 255, 0.20);
  border: 1px solid rgba(255, 255, 255, 0.42);
}
/* 顶部弧形高光 */
.ios-icon .ios-icon-glass::before {
  content: '';
  position: absolute;
  top: -28%; left: -18%; width: 136%; height: 62%;
  background: radial-gradient(ellipse at 50% 0%,
    rgba(255,255,255,0.58) 0%,
    rgba(255,255,255,0.16) 50%,
    transparent 75%);
  border-radius: 0 0 60% 60%;
  pointer-events: none;
}
/* 底部反光 */
.ios-icon .ios-icon-glass::after {
  content: '';
  position: absolute;
  bottom: 0; left: 10%; right: 10%; height: 28%;
  background: linear-gradient(to top, rgba(255,255,255,0.14), transparent);
  border-radius: 0 0 14px 14px;
  pointer-events: none;
}
.ios-icon .ios-icon-emoji {
  position: relative; z-index: 3;
  filter: drop-shadow(0 2px 3px rgba(0,0,0,0.18));
  line-height: 1;
}

/* ===== 19. 课程详情页 ===== */
.lesson-detail-header {
  display: flex; align-items: center; gap: 12px;
}
.back-btn {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.85);
  cursor: pointer;
  color: #6B7280;
  transition: background 0.18s ease, transform 0.18s ease;
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.back-btn:active { transform: scale(0.9); }
.lesson-detail-title {
  display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0;
}
.lesson-detail-emoji { font-size: 28px; line-height: 1; flex-shrink: 0; }
.lesson-video-section {
  position: relative; border-radius: 1.5rem; overflow: hidden; margin-bottom: 16px;
}
.video-placeholder {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; min-height: 200px; padding: 32px 20px;
  cursor: pointer; user-select: none; -webkit-tap-highlight-color: transparent;
}
.video-placeholder-icon {
  font-size: 56px; margin-bottom: 12px;
  animation: bounceSoft 2.2s ease-in-out infinite;
}
.video-placeholder-text  { color: rgba(255,255,255,0.95); font-size: 16px; font-weight: 700; margin: 0 0 4px; }
.video-placeholder-hint  { color: rgba(255,255,255,0.70); font-size: 12px; margin: 0; }
.video-watched-badge {
  position: absolute; top: 12px; right: 12px;
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 12px; border-radius: 99px;
  background: rgba(255,255,255,0.28); backdrop-filter: blur(8px);
  color: rgba(255,255,255,0.95); font-size: 11px; font-weight: 600;
}
.lesson-info-card  { margin-bottom: 16px; }
.key-points-section { margin-bottom: 20px; }
.section-title {
  display: flex; align-items: center; gap: 6px;
  font-size: 15px; font-weight: 800; color: #2D1B69;
  margin: 0 0 12px 4px;
}
.key-points-list { display: flex; flex-direction: column; gap: 8px; }
.key-point-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px 16px; border-radius: 1.25rem;
  background: rgba(255,255,255,0.58);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.85);
  box-shadow: 0 3px 12px rgba(0,0,0,0.04);
  opacity: 0; transform: translateY(12px);
  animation: cardSlideUp 0.4s ease forwards;
}
.key-point-index {
  width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, #A78BFA, #EC4899);
  color: #fff; font-size: 12px; font-weight: 800; flex-shrink: 0;
}
.key-point-text { color: #4B5563; font-size: 13px; font-weight: 500; line-height: 1.6; padding-top: 2px; }
.lesson-actions { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 8px 0 20px; }
.action-hint { color: #9CA3AF; font-size: 12px; margin: 0; }
.lesson-start-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 14px 24px; border-radius: 1.25rem;
  border: 1px solid rgba(255,255,255,0.55); color: #fff;
  font-size: 15px; font-weight: 700; letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: 0 8px 28px rgba(0,0,0,0.12), inset 0 1px 0 rgba(255,255,255,0.50);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  -webkit-tap-highlight-color: transparent;
}
.lesson-start-btn:active { transform: scale(0.97); box-shadow: 0 4px 12px rgba(0,0,0,0.10); }
.lesson-detail-page { padding-bottom: 20px; }

/* ===== 20. 动画 ===== */
@keyframes bounceSoft {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}
.coming-soon-emoji {
  display: inline-block;
  animation: bounceSoft 2.2s ease-in-out infinite;
}

/* ===== 21. 答题页 ===== */
.quiz-header { display: flex; align-items: center; gap: 10px; }
.quiz-header-info { flex: 1; display: flex; align-items: center; gap: 8px; min-width: 0; }
.quiz-header-emoji { font-size: 22px; line-height: 1; flex-shrink: 0; }
.quiz-header-title { font-size: 15px; font-weight: 800; color: #2D1B69; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.quiz-streak {
  display: flex; align-items: center; gap: 4px; padding: 5px 12px;
  border-radius: 99px;
  background: rgba(255,255,255,0.58); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.80);
  font-size: 13px; font-weight: 700; color: #9CA3AF;
  flex-shrink: 0; transition: all 0.3s ease;
}
.quiz-streak svg { width: 14px; height: 14px; stroke: #9CA3AF; transition: stroke 0.3s ease; }
.quiz-streak-active { background: linear-gradient(135deg,rgba(251,191,36,0.18),rgba(245,158,11,0.18)); border-color: rgba(251,191,36,0.45); color: #D97706; }
.quiz-streak-active svg { stroke: #D97706; }
.quiz-progress-wrap { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.quiz-progress-track { flex: 1; height: 6px; border-radius: 99px; background: rgba(167,139,250,0.14); overflow: hidden; }
.quiz-progress-fill { height: 100%; border-radius: 99px; background: linear-gradient(90deg,#A78BFA,#EC4899); transition: width 0.5s cubic-bezier(0.25,0.46,0.45,0.94); }
.quiz-progress-text { font-size: 12px; font-weight: 600; color: #9CA3AF; flex-shrink: 0; }
.quiz-page { padding-bottom: 30px; }
.quiz-question-card { margin-bottom: 16px; }
.quiz-question-text { font-size: 16px; font-weight: 700; color: #1F1040; line-height: 1.7; margin: 0; }
.quiz-options { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.quiz-option {
  display: flex; align-items: flex-start; gap: 12px; padding: 14px 16px;
  border-radius: 1.25rem;
  background: rgba(255,255,255,0.60); backdrop-filter: blur(12px);
  border: 1.5px solid rgba(255,255,255,0.85);
  box-shadow: 0 3px 12px rgba(0,0,0,0.04);
  cursor: pointer; color: #374151; font-size: 14px; font-weight: 500;
  text-align: left; transition: all 0.2s ease; -webkit-tap-highlight-color: transparent;
}
.quiz-option:active:not(.quiz-option-disabled) { transform: scale(0.98); }
.quiz-option-letter {
  width: 28px; height: 28px; display: flex; align-items: center; justify-content: center;
  border-radius: 10px; background: rgba(167,139,250,0.12); color: #7C3AED;
  font-size: 13px; font-weight: 800; flex-shrink: 0;
}
.quiz-option-text { padding-top: 3px; line-height: 1.5; }
.quiz-option-selected { border-color: rgba(139,92,246,0.45); background: rgba(139,92,246,0.07); }
.quiz-option-selected .quiz-option-letter { background: #7C3AED; color: #fff; }
.quiz-option-correct { border-color: rgba(34,197,94,0.50) !important; background: rgba(34,197,94,0.08) !important; }
.quiz-option-correct .quiz-option-letter { background: #22C55E !important; color: #fff !important; }
.quiz-option-wrong { border-color: rgba(239,68,68,0.50) !important; background: rgba(239,68,68,0.07) !important; }
.quiz-option-wrong .quiz-option-letter { background: #EF4444 !important; color: #fff !important; }
.quiz-option-disabled { pointer-events: none; opacity: 0.75; }
.quiz-feedback {
  display: flex; align-items: center; gap: 12px; padding: 14px 18px;
  border-radius: 1.25rem; margin-bottom: 12px;
  opacity: 0; transform: translateY(8px);
  animation: cardSlideUp 0.35s ease forwards;
}
.quiz-feedback-correct { background: rgba(34,197,94,0.10); border: 1px solid rgba(34,197,94,0.28); }
.quiz-feedback-correct .quiz-feedback-icon { color: #22C55E; }
.quiz-feedback-correct .quiz-feedback-title { color: #16A34A; }
.quiz-feedback-wrong { background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.22); }
.quiz-feedback-wrong .quiz-feedback-icon { color: #EF4444; }
.quiz-feedback-wrong .quiz-feedback-title { color: #DC2626; }
.quiz-feedback-icon { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.quiz-feedback-title { font-size: 15px; font-weight: 800; margin: 0; }
.quiz-feedback-hint { font-size: 12px; color: #6B7280; margin: 2px 0 0; line-height: 1.5; }
.quiz-feedback-explain { font-size: 12.5px; color: #4B5563; margin: 6px 0 0; line-height: 1.65; padding: 8px 10px; background: rgba(255,255,255,0.55); border-radius: 10px; border-left: 3px solid rgba(99,102,241,0.45); }
.quiz-multi-tip { font-size: 12px; color: #7C3AED; font-weight: 600; margin: 6px 0 0; opacity: 0.85; }
.quiz-confirm-btn {
  display: flex; align-items: center; justify-content: center;
  width: 100%; padding: 13px 24px; border-radius: 1.25rem; margin-top: 12px;
  border: 2px solid rgba(124,58,237,0.5); color: #7C3AED;
  background: rgba(124,58,237,0.08);
  font-size: 15px; font-weight: 700; cursor: pointer;
  transition: all 0.18s ease; -webkit-tap-highlight-color: transparent;
}
.quiz-confirm-btn:disabled { opacity: 0.38; cursor: not-allowed; }
.quiz-confirm-btn:not(:disabled):active { transform: scale(0.97); background: rgba(124,58,237,0.15); }

/* 连线题 */
.quiz-link-board {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px;
}
.quiz-link-col { display: flex; flex-direction: column; gap: 10px; }
.quiz-link-left, .quiz-link-right {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px; border-radius: 14px;
  background: rgba(255,255,255,0.55); border: 1.5px solid rgba(255,255,255,0.65);
  text-align: left; cursor: pointer; transition: all 0.18s ease;
  -webkit-tap-highlight-color: transparent;
}
.quiz-link-key {
  flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%;
  background: rgba(139,92,246,0.10); color: #7C3AED;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px;
}
.quiz-link-text { flex: 1; line-height: 1.4; font-size: 13.5px; color: #1F2937; }
.quiz-link-pair { font-weight: 700; color: #7C3AED; font-size: 13px; min-width: 32px; text-align: right; }
.quiz-link-active { border-color: rgba(124,58,237,0.55); background: rgba(124,58,237,0.10); }
.quiz-link-paired { background: rgba(34,197,94,0.06); border-color: rgba(34,197,94,0.30); }
.quiz-link-paired .quiz-link-key { background: #22C55E; color: #fff; }
.quiz-link-correct {
  border-color: rgba(34,197,94,0.55) !important; background: rgba(34,197,94,0.10) !important;
}
.quiz-link-correct .quiz-link-key { background: #22C55E !important; color: #fff !important; }
.quiz-link-wrong {
  border-color: rgba(239,68,68,0.50) !important; background: rgba(239,68,68,0.08) !important;
}
.quiz-link-wrong .quiz-link-key { background: #EF4444 !important; color: #fff !important; }
.quiz-next-btn {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  width: 100%; padding: 14px 24px; border-radius: 1.25rem;
  border: 1px solid rgba(255,255,255,0.55); color: #fff;
  font-size: 15px; font-weight: 700; cursor: pointer;
  box-shadow: 0 8px 28px rgba(0,0,0,0.10), inset 0 1px 0 rgba(255,255,255,0.50);
  transition: transform 0.18s ease; -webkit-tap-highlight-color: transparent;
  opacity: 0; animation: cardSlideUp 0.35s ease 0.1s forwards;
}
.quiz-next-btn:active { transform: scale(0.97); }
.quiz-video-hint { margin-top: 12px; text-align: center; opacity: 0; animation: cardSlideUp 0.4s ease 0.2s forwards; }
.quiz-video-hint-icon { font-size: 32px; margin-bottom: 8px; }
.quiz-video-hint-text { font-size: 14px; font-weight: 600; color: #4B5563; margin: 0 0 12px; }
.quiz-video-hint-actions { display: flex; gap: 8px; justify-content: center; }
.quiz-video-hint-btn {
  padding: 8px 20px; border-radius: 99px;
  border: 1.5px solid rgba(139,92,246,0.35); background: rgba(139,92,246,0.08);
  color: #7C3AED; font-size: 13px; font-weight: 600; cursor: pointer;
  transition: all 0.18s ease; -webkit-tap-highlight-color: transparent;
}
.quiz-video-hint-btn:active { transform: scale(0.95); }
.quiz-video-hint-btn-secondary { border-color: rgba(156,163,175,0.35); background: rgba(156,163,175,0.08); color: #6B7280; }

/* ===== 22. 答题结果页 ===== */
.quiz-result-page { padding: 20px 0; }
.quiz-result-card {
  text-align: center; border: 1px solid rgba(255,255,255,0.55);
  box-shadow: 0 10px 40px rgba(0,0,0,0.10), inset 0 1px 0 rgba(255,255,255,0.60);
  margin-bottom: 20px;
}
.quiz-result-icon {
  width: 88px; height: 88px; border-radius: 28px; margin: 0 auto 12px;
  background: rgba(255,255,255,0.22);
  display: flex; align-items: center; justify-content: center;
  animation: resultIconPop 0.6s cubic-bezier(0.34,1.56,0.64,1) both, bounceSoft 2.8s ease-in-out 0.6s infinite;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}
@keyframes resultIconPop {
  0%   { transform: scale(0) rotate(-15deg); opacity: 0; }
  100% { transform: scale(1) rotate(0deg);   opacity: 1; }
}
.quiz-result-title { font-size: 24px; font-weight: 900; color: #fff; margin: 0 0 4px; text-shadow: 0 2px 8px rgba(0,0,0,0.10); }
.quiz-result-subtitle { font-size: 13px; color: rgba(255,255,255,0.80); margin: 0 0 16px; }
.quiz-result-stars { display: flex; justify-content: center; gap: 8px; margin-bottom: 20px; }
.quiz-result-star { width: 36px; height: 36px; opacity: 0; animation: starPop 0.4s cubic-bezier(0.34,1.56,0.64,1) forwards; }
@keyframes starPop { 0% { opacity:0; transform:scale(0.3) rotate(-15deg); } 100% { opacity:1; transform:scale(1) rotate(0deg); } }
.quiz-result-stats { display: flex; justify-content: space-around; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.25); }
.quiz-result-stat { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.quiz-result-stat-value { font-size: 20px; font-weight: 900; color: #fff; }
.quiz-result-stat-label { font-size: 11px; color: rgba(255,255,255,0.70); font-weight: 500; }
.quiz-result-actions { display: flex; flex-direction: column; gap: 10px; }
.quiz-result-btn-primary {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  width: 100%; padding: 14px 24px; border-radius: 1.25rem;
  border: 1px solid rgba(255,255,255,0.50); color: #fff;
  font-size: 15px; font-weight: 700; cursor: pointer;
  box-shadow: 0 8px 28px rgba(0,0,0,0.10), inset 0 1px 0 rgba(255,255,255,0.50);
  transition: transform 0.18s ease; -webkit-tap-highlight-color: transparent;
}
.quiz-result-btn-primary:active { transform: scale(0.97); }
.quiz-result-btn-secondary {
  width: 100%; padding: 14px 24px; border-radius: 1.25rem;
  border: 1.5px solid rgba(167,139,250,0.25);
  background: rgba(255,255,255,0.58); backdrop-filter: blur(12px);
  color: #6B7280; font-size: 14px; font-weight: 600; cursor: pointer;
  transition: all 0.18s ease; -webkit-tap-highlight-color: transparent;
}
.quiz-result-btn-secondary:active { transform: scale(0.97); }

/* ===== 23. 响应式布局 ===== */
#app-shell { width: 100%; min-height: 100vh; }
#app { width: 100%; }

@media (min-width: 768px) {
  body {
    display: flex; align-items: flex-start; justify-content: center;
    padding: 32px 24px 48px;
    animation: bgShift 16s ease-in-out infinite alternate;
  }
  #app-shell {
    width: 420px; min-width: 360px; max-width: 480px;
    min-height: calc(100vh - 80px); border-radius: 36px; overflow: hidden;
    box-shadow:
      0 24px 70px rgba(139,92,246,0.16),
      0 8px 28px rgba(0,0,0,0.08),
      inset 0 1px 0 rgba(255,255,255,0.9);
    border: 1px solid rgba(255,255,255,0.75);
    position: relative;
  }
  #app { min-height: calc(100vh - 80px); height: calc(100vh - 80px); border-radius: 36px; overflow: hidden; }
  #app-header { border-radius: 36px 36px 0 0; }
  #bottom-nav { position: absolute; bottom: 0; left: 0; right: 0; border-radius: 0 0 36px 36px; }
  #app-content { height: 100%; }
  .bg-orb-1 { width: 220px; height: 220px; }
  .bg-orb-2 { width: 180px; height: 180px; }
  .bg-orb-3 { width: 140px; height: 140px; }
}

@media (min-width: 1024px) {
  body { padding: 40px 24px 60px; }
  #app-shell { width: 460px; }
}

/* ===== Tab 切换栏 ===== */
.tc-tab-bar {
  display: flex;
  gap: 8px;
  background: rgba(255,255,255,0.55);
  border: 1px solid rgba(255,255,255,0.80);
  backdrop-filter: blur(12px);
  border-radius: 18px;
  padding: 5px;
}

.tc-tab {
  flex: 1;
  padding: 10px 0;
  border: none;
  border-radius: 13px;
  font-size: 14px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.22s ease;
  background: transparent;
  color: #9CA3AF;
}

.tc-tab-active {
  background: linear-gradient(135deg, rgba(167,139,250,0.90), rgba(236,72,153,0.80));
  color: #fff;
  box-shadow: 0 4px 14px rgba(139,92,246,0.28);
}

/* ===== 专题训练网格 ===== */
.topic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding: 16px 16px 100px;
}

.topic-card {
  position: relative;
  cursor: default;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 8px 24px rgba(0,0,0,0.10);
}

.topic-coming-badge {
  font-size: 10px;
  font-weight: 700;
  color: rgba(255,255,255,0.90);
  background: rgba(255,255,255,0.22);
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 20px;
  padding: 3px 8px;
  backdrop-filter: blur(6px);
  white-space: nowrap;
}