/* AI讲故事页面专用样式 - 现代化浅色系列 */
.ai-storytelling-container {
  min-height: 100vh;
  background: linear-gradient(135deg, #fdfdfd 0%, #f8fafc 25%, #e2e8f0 75%, #cbd5e1 100%);
  padding: 60px 0 120px;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  position: relative;
  overflow-x: hidden;
}

.ai-storytelling-container::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 80%, rgba(147, 197, 253, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(251, 207, 232, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(254, 240, 138, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.story-header {
  text-align: center;
  margin-bottom: 60px;
  color: #1e293b;
  position: relative;
  z-index: 1;
  padding: 40px 20px;
}

.header-content {
  max-width: 800px;
  margin: 0 auto;
}

.story-header h1 {
  font-size: 3.2rem;
  margin-bottom: 24px;
  text-shadow: 0 4px 12px rgba(30, 64, 175, 0.15);
  color: #1e40af;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.header-icon {
  font-size: 3.5rem;
  margin-right: 15px;
  filter: drop-shadow(0 4px 8px rgba(59, 130, 246, 0.3));
}

.header-text {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.header-logo {
  height: 48px;
  vertical-align: middle;
  margin-left: 20px;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
  border-radius: 12px;
}

.header-subtitle {
  font-size: 1.3rem;
  color: #64748b;
  opacity: 1;
  max-width: 700px;
  margin: 0 auto 30px;
  font-weight: 400;
  line-height: 1.6;
}

.header-features {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.search-container {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 320px;
  padding: 16px 50px 16px 20px;
  border: 2px solid rgba(59, 130, 246, 0.2);
  border-radius: 50px;
  font-size: 16px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  color: #334155;
}

.search-input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
  background: rgba(255, 255, 255, 0.95);
}

.search-input::placeholder {
  color: #94a3b8;
}

.search-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.search-btn:hover {
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.search-icon {
  width: 18px;
  height: 18px;
  filter: brightness(0) invert(1);
  transition: transform 0.3s ease;
}

.search-btn:hover .search-icon {
  transform: scale(1.1);
}

.stats-info {
  display: flex;
  gap: 30px;
  align-items: center;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #475569;
  font-size: 16px;
  font-weight: 500;
}

.stat-item i {
  color: #3b82f6;
  font-size: 18px;
}

.stat-icon {
  width: 18px;
  height: 18px;
  filter: brightness(0) saturate(100%) invert(27%) sepia(96%) saturate(1352%) hue-rotate(213deg) brightness(97%) contrast(101%);
}

/* 评分图标特殊大小调整 */
.stat-item img[src*="icon-pinfen.png"] {
  width: 20px;
  height: 20px;
}

/* 数学图标特殊大小调整 */
.filter-btn img[src*="icon-xyz.png"] {
  width: 18px;
  height: 18px;
}

/* 梦想图标特殊大小调整 */
.filter-btn img[src*="icon-mengxiang1.png"] {
  width: 18px;
  height: 18px;
}

/* 成长图标特殊大小调整 */
.filter-btn img[src*="icon-chengzhang2.png"] {
  width: 18px;
  height: 18px;
}

/* 经典图标特殊大小调整 */
.filter-btn img[src*="icon-经典.png"] {
  width: 18px;
  height: 18px;
}

.story-library {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

.library-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 50px;
  padding: 30px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(15px);
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
}

.library-filter {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  flex: 1;
}

.filter-btn {
  background: rgba(248, 250, 252, 0.8);
  border: 2px solid rgba(59, 130, 246, 0.15);
  color: #475569;
  padding: 12px 24px;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 15px;
  font-weight: 500;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.filter-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.5s;
}

.filter-btn:hover::before {
  left: 100%;
}

.filter-btn:hover {
  background: rgba(59, 130, 246, 0.08);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.3);
  color: #1e40af;
}

.filter-btn.active {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  border-color: #3b82f6;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.filter-btn i {
  font-size: 14px;
  transition: transform 0.3s ease;
}

.filter-btn:hover i {
  transform: scale(1.1);
}

.filter-icon {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}

.filter-btn:hover .filter-icon {
  transform: scale(1.1);
}

.sort-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(248, 250, 252, 0.8);
  padding: 10px 16px;
  border-radius: 50px;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.sort-controls label {
  color: #475569;
  font-weight: 500;
  font-size: 14px;
}

.sort-select {
  background: transparent;
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 25px;
  padding: 8px 16px;
  color: #334155;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.sort-select:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.story-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  margin-bottom: 60px;
  padding: 0 10px;
}

.loading-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  color: #64748b;
}

.loading-indicator .loading-spinner {
  margin-bottom: 20px;
  width: 40px;
  height: 40px;
  border: 3px solid rgba(59, 130, 246, 0.2);
  border-top-color: #3b82f6;
  animation: spin 1.2s linear infinite;
}

.loading-text {
  font-size: 18px;
  font-weight: 500;
}

.story-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.8);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  backdrop-filter: blur(15px);
  position: relative;
}

.story-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.02), rgba(147, 197, 253, 0.02));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
}

.story-card:hover::before {
  opacity: 1;
}

.story-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: 0 20px 50px rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.2);
}

.story-cover {
  width: 100%;
  height: 220px;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 30%, #bae6fd 70%, #e2e8f0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  z-index: 2;
}

.story-cover::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
}

.story-cover img {
  width: 85%;
  height: 85%;
  object-fit: contain;
  border-radius: 16px;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.1));
  transition: transform 0.3s ease;
}

.story-card:hover .story-cover img {
  transform: scale(1.05);
}

.story-info {
  padding: 28px;
  position: relative;
  z-index: 2;
}

.story-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #1e293b;
  line-height: 1.3;
}

.story-description {
  color: #64748b;
  margin-bottom: 20px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 15px;
}

.story-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  font-size: 14px;
  color: #94a3b8;
  padding: 12px 16px;
  background: rgba(248, 250, 252, 0.6);
  border-radius: 12px;
  backdrop-filter: blur(5px);
}

.story-category {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  color: #3b82f6;
}

.story-category::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #3b82f6;
  border-radius: 50%;
}

.story-difficulty {
  display: flex;
  align-items: center;
  gap: 4px;
}

.difficulty-star {
  color: #fbbf24;
  font-size: 14px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.story-actions {
  display: flex;
  gap: 10px;
}

.btn-story {
  flex: 1;
  padding: 12px 20px;
  border: none;
  border-radius: 25px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 14px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.btn-story::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.6s ease;
}

.btn-story:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  border: none;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2563eb, #1e40af);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.8);
  color: #3b82f6;
  border: 2px solid rgba(59, 130, 246, 0.3);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
  background: #3b82f6;
  color: white;
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.3);
  border-color: #3b82f6;
}

/* 故事阅读界面样式 */
.story-reader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(15px);
}

.story-reader.active {
  display: flex;
}

.reader-container {
  background: white;
  border-radius: 24px;
  width: 92%;
  max-width: 850px;
  max-height: 92%;
  overflow: hidden;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3);
  animation: slideInUp 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reader-header {
  background: linear-gradient(135deg, #0284c7, #0891b2);
  color: white;
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.reader-title {
  font-size: 1.3rem;
  font-weight: bold;
}

.reader-controls {
  display: flex;
  gap: 10px;
}

.reader-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  padding: 8px 15px;
  border-radius: 15px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.reader-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

.story-content {
  padding: 30px;
  max-height: 70vh;
  overflow-y: auto;
}

.story-section {
  margin-bottom: 30px;
  text-align: center;
}

.section-image {
  width: 100%;
  max-width: 400px;
  height: 200px;
  object-fit: cover;
  border-radius: 15px;
  margin-bottom: 20px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.section-text {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #333;
  margin-bottom: 20px;
}

.control-buttons {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 30px;
  padding: 24px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.9));
  border-radius: 20px;
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.main-controls {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.secondary-controls {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  padding-top: 16px;
  border-top: 1px solid rgba(226, 232, 240, 0.6);
}

.btn-large {
  padding: 15px 30px;
  font-size: 16px;
}

.btn-voice {
  background: linear-gradient(135deg, #ff6b6b, #ff5252);
  color: white;
  border: none;
  border-radius: 25px;
  padding: 15px 25px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 16px;
  box-shadow: 0 4px 16px rgba(255, 107, 107, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-voice:hover {
  background: linear-gradient(135deg, #ff5252, #e53e3e);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-voice.speaking {
  animation: pulse 1.5s infinite;
  background: linear-gradient(135deg, #10b981, #059669);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.1);
  }

  100% {
    transform: scale(1);
  }
}

/* 语音控制切换按钮 */
.voice-toggle-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  border: none;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 20px;
  z-index: 1000;
}

.voice-toggle-btn:hover {
  background: linear-gradient(135deg, #2563eb, #1e40af);
  transform: translateY(-3px) scale(1.1);
  box-shadow: 0 12px 35px rgba(59, 130, 246, 0.4);
  border-color: rgba(255, 255, 255, 0.3);
}

/* 语音切换图标样式 */
.voice-toggle-icon {
  width: 24px;
  height: 24px;
  filter: brightness(0) invert(1);
  transition: transform 0.3s ease;
}

.voice-toggle-btn:hover .voice-toggle-icon {
  transform: scale(1.1);
}

/* 语音控制区域 */
.voice-controls {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1001;
  opacity: 0;
  transform: translateY(20px);
}

.voice-controls:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.voice-info {
  padding: 12px 20px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(147, 197, 253, 0.05));
  border-bottom: 1px solid rgba(248, 250, 252, 0.8);
}

.voice-status {
  color: #3b82f6;
  font-size: 14px;
  font-weight: 500;
}

.voice-buttons {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  gap: 12px;
}

.voice-btn {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.3);
  position: relative;
  overflow: hidden;
}

.voice-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.3s ease;
}

.voice-btn:active::before {
  width: 100%;
  height: 100%;
}

.voice-btn:hover {
  background: linear-gradient(135deg, #2563eb, #1e40af);
  transform: scale(1.1);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}

.voice-btn:disabled {
  background: #94a3b8;
  cursor: not-allowed;
  box-shadow: none;
}

/* 语音控制关闭按钮 */
.voice-close-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: none;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.voice-close-btn:hover {
  background: #ef4444;
  color: white;
  transform: scale(1.1);
}

/* 语音关闭图标样式 */
.voice-close-icon {
  width: 14px;
  height: 14px;
  filter: brightness(0) saturate(100%) invert(27%) sepia(96%) saturate(1352%) hue-rotate(213deg) brightness(97%) contrast(101%);
  transition: transform 0.3s ease;
}

.voice-close-btn:hover .voice-close-icon {
  filter: brightness(0) invert(1);
  transform: scale(1.1);
}

/* 语音控制面板显示状态 */
.voice-controls.show {
  opacity: 1;
  transform: translateY(0);
}

/* 语音控制面板隐藏状态 */
.voice-controls.hide {
  opacity: 0;
  transform: translateY(20px);
}

/* 快速导航 */
.quick-nav {
  position: fixed;
  bottom: 30px;
  left: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 100;
}

.nav-link {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 50px;
  padding: 16px 20px;
  color: #475569;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-weight: 500;
  font-size: 14px;
}

.nav-link:hover {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 12px 35px rgba(59, 130, 246, 0.15);
}

.nav-link i {
  font-size: 16px;
}

/* 导航图标样式 */
.nav-icon {
  width: 16px;
  height: 16px;
  filter: brightness(0) saturate(100%) invert(27%) sepia(96%) saturate(1352%) hue-rotate(213deg) brightness(97%) contrast(101%);
}

/* 元数据图标样式 */
.meta-icon {
  width: 14px;
  height: 14px;
  filter: brightness(0) saturate(100%) invert(27%) sepia(96%) saturate(1352%) hue-rotate(213deg) brightness(97%) contrast(101%);
}

/* 统计卡片图标样式 */
.stat-icon-img {
  width: 24px;
  height: 24px;
  filter: brightness(0) saturate(100%) invert(27%) sepia(96%) saturate(1352%) hue-rotate(213deg) brightness(97%) contrast(101%);
}

/* 按钮图标样式 */
.btn-icon {
  width: 16px;
  height: 16px;
  filter: brightness(0) invert(1);
  margin-right: 6px;
  transition: transform 0.3s ease;
}

.btn-story:hover .btn-icon {
  transform: scale(1.1);
}

/* 辅助按钮样式 */
.btn-warning {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}

.btn-warning:hover {
  background: linear-gradient(135deg, #d97706, #b45309);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
  background: linear-gradient(135deg, #059669, #047857);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

/* 关闭图标样式 */
.close-icon {
  width: 18px;
  height: 18px;
  filter: brightness(0) saturate(100%) invert(27%) sepia(96%) saturate(1352%) hue-rotate(213deg) brightness(97%) contrast(101%);
}

/* 阅读器图标样式 */
.reader-icon {
  width: 16px;
  height: 16px;
  filter: brightness(0) invert(1);
}

/* 语速控制面板 */
.speed-panel {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1001;
  display: none;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
}

.speed-panel.active {
  display: flex;
}

.speed-content {
  background: white;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  min-width: 320px;
  text-align: center;
  animation: slideInUp 0.3s ease;
}

.speed-content h3 {
  color: #1e293b;
  margin-bottom: 30px;
  font-size: 20px;
  font-weight: 600;
}

.speed-slider {
  margin-bottom: 30px;
}

.speed-slider label {
  display: block;
  color: #64748b;
  margin-bottom: 15px;
  font-weight: 500;
}

.speed-slider input[type="range"] {
  width: 100%;
  height: 6px;
  background: linear-gradient(to right, #3b82f6, #1d4ed8);
  border-radius: 3px;
  outline: none;
  margin-bottom: 10px;
}

.speed-slider input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  background: #3b82f6;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

#speedValue {
  color: #3b82f6;
  font-weight: 600;
  font-size: 16px;
}

.speed-presets {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 30px;
}

.speed-preset {
  padding: 10px 20px;
  border: 2px solid #e2e8f0;
  background: transparent;
  border-radius: 25px;
  color: #64748b;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 14px;
  font-weight: 500;
}

.speed-preset:hover,
.speed-preset.active {
  background: #3b82f6;
  color: white;
  border-color: #3b82f6;
  transform: scale(1.05);
}

.speed-close {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  border: none;
  border-radius: 25px;
  padding: 12px 24px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.speed-close:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

/* 新增样式 */
.reader-title-info {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.progress-bar {
  flex: 1;
  height: 4px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #059669);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.progress-text {
  color: rgba(255, 255, 255, 0.9);
  font-size: 12px;
  font-weight: 500;
}

.btn-info {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  border: none;
  border-radius: 25px;
  padding: 15px 25px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 16px;
  font-weight: 500;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-info:hover {
  background: linear-gradient(135deg, #059669, #047857);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
  border-color: rgba(255, 255, 255, 0.3);
}

/* 剧情选择系统样式 */
.story-choices {
  margin: 30px 0;
  padding: 25px;
  backdrop-filter: blur(15px);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(147, 197, 253, 0.05));
  border-radius: 20px;
  border: 2px solid rgba(59, 130, 246, 0.2);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
  animation: fadeInUp 0.6s ease;
}

.choices-header {
  text-align: center;
  margin-bottom: 25px;
}

.choices-header h3 {
  color: #1e40af;
  font-size: 1.4rem;
  margin-bottom: 10px;
  font-weight: 600;
  text-shadow: 0 2px 8px rgba(30, 64, 175, 0.1);
}

.choices-header p {
  color: #64748b;
  font-size: 1rem;
  margin: 0;
  font-weight: 400;
}

.choices-container {
  display: grid;
  gap: 15px;
  margin-bottom: 20px;
}

.choice-btn {
  background: rgba(255, 255, 255, 0.9);
  border: 2px solid rgba(59, 130, 246, 0.2);
  border-radius: 16px;
  padding: 18px 24px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 16px;
  font-weight: 500;
  color: #334155;
  text-align: left;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

.choice-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
  transition: left 0.6s;
}

.choice-btn:hover::before {
  left: 100%;
}

.choice-btn:hover {
  background: rgba(59, 130, 246, 0.08);
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
  color: #1e40af;
}

.choice-btn.clicked {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  border-color: #3b82f6;
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.choice-btn.clicked::after {
  content: ' ✓';
  font-size: 18px;
  margin-left: 10px;
}

.choice-feedback {
  text-align: center;
  padding: 15px;
  background: rgba(240, 253, 244, 0.8);
  border-radius: 12px;
  border: 1px solid rgba(34, 197, 94, 0.2);
  backdrop-filter: blur(5px);
  animation: fadeIn 0.5s ease;
}

.choice-feedback-text {
  color: #166534;
  font-size: 16px;
  font-weight: 500;
  margin: 0;
}

/* 分支剧情内容样式 */
.branching-content {
  margin: 25px 0;
  padding: 25px;
  backdrop-filter: blur(15px);
  background: linear-gradient(135deg, rgba(251, 207, 232, 0.1), rgba(254, 240, 138, 0.05));
  border-radius: 20px;
  border: 2px solid rgba(251, 207, 232, 0.2);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
  animation: slideInLeft 0.6s ease;
}

.branch-narrative {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #374151;
  margin-bottom: 20px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 12px;
  backdrop-filter: blur(5px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.btn-continue {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  border: none;
  margin: 0 auto;
  display: block;
  min-width: 150px;
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
}

.btn-continue:hover {
  background: linear-gradient(135deg, #059669, #047857);
  transform: scale(1.05);
  box-shadow: 0 12px 30px rgba(16, 185, 129, 0.4);
}

.btn-continue:disabled {
  background: #94a3b8;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 选择状态指示器 */
.choice-count {
  text-align: center;
  margin: 20px 0;
  font-size: 14px;
  color: #64748b;
}

.choice-count::before {
  content: '🎨 ';
  font-size: 16px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .ai-storytelling-container {
    padding: 40px 0 80px;
  }

  .story-header {
    margin-bottom: 40px;
    padding: 20px;
  }

  .story-header h1 {
    font-size: 2.5rem;
    margin-bottom: 16px;
  }

  .header-icon {
    font-size: 2.8rem;
    margin-right: 10px;
  }

  .header-text {
    margin-left: 5px;
  }

  .header-logo {
    height: 40px;
    margin-left: 15px;
  }

  .header-subtitle {
    font-size: 1.1rem;
    margin: 0 auto 20px;
  }

  .header-features {
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
  }

  .search-input {
    width: 280px;
    padding: 14px 45px 14px 18px;
  }

  .stats-info {
    gap: 20px;
  }

  .library-controls {
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
  }

  .library-filter {
    justify-content: center;
  }

  .story-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 0 5px;
  }

  .filter-btn {
    padding: 10px 20px;
    font-size: 14px;
    gap: 6px;
  }

  .story-card .story-info {
    padding: 24px;
  }

  .story-title {
    font-size: 1.4rem;
  }

  .voice-controls {
    bottom: 20px;
    right: 20px;
  }

  .voice-buttons {
    padding: 12px 16px;
    gap: 8px;
  }

  .voice-btn {
    width: 44px;
    height: 44px;
    font-size: 14px;
  }

  .quick-nav {
    bottom: 20px;
    left: 20px;
  }

  .nav-link {
    padding: 12px 16px;
    font-size: 13px;
  }

  .reader-container {
    width: 95%;
    height: 95%;
    max-width: none;
  }

  .story-content {
    padding: 24px 20px;
  }

  .control-buttons {
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
    padding: 15px;
  }

  .main-controls {
    gap: 12px;
  }

  .secondary-controls {
    gap: 8px;
  }

  .btn-large {
    padding: 12px 20px;
    font-size: 14px;
    flex: 1;
    min-width: 120px;
  }

  .speed-content {
    margin: 20px;
    padding: 30px;
    min-width: 280px;
  }

  .speed-presets {
    flex-wrap: wrap;
    gap: 8px;
  }

  .speed-preset {
    padding: 8px 16px;
    font-size: 13px;
  }

  .story-choices {
    margin: 20px 0;
    padding: 20px 15px;
  }

  .choices-header h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
  }

  .choice-btn {
    padding: 15px 18px;
    font-size: 15px;
  }

  .branching-content {
    margin: 20px 0;
    padding: 20px 15px;
  }

  .branch-narrative {
    font-size: 1rem;
    padding: 15px;
    margin-bottom: 15px;
  }
}

@media (max-width: 480px) {
  .story-header h1 {
    font-size: 2rem;
  }

  .header-icon {
    font-size: 2.2rem;
  }

  .header-logo {
    height: 36px;
    margin-left: 10px;
  }

  .search-input {
    width: 240px;
    padding: 12px 40px 12px 16px;
    font-size: 14px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 13px;
    gap: 4px;
  }

  .story-cover {
    height: 180px;
  }

  .story-card .story-info {
    padding: 20px;
  }

  .story-title {
    font-size: 1.3rem;
  }

  .story-meta {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
    padding: 10px 12px;
  }

  .voice-controls {
    bottom: 15px;
    right: 15px;
  }

  .voice-buttons {
    padding: 10px 12px;
    gap: 6px;
  }

  .voice-btn {
    width: 40px;
    height: 40px;
    font-size: 13px;
  }

  .quick-nav {
    bottom: 15px;
    left: 15px;
  }

  .nav-link {
    padding: 10px 12px;
    font-size: 12px;
    gap: 8px;
  }
}

/* 加载动画 */
.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(14, 165, 233, 0.3);
  border-radius: 50%;
  border-top-color: #0284c7;
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}