/* ============================================================animations.css — 动画与过渡效果
   ============================================================ */

/* ──── 关键帧 ──── */
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes pulse {
  0% { box-shadow: 0 4px 20px rgba(232, 160, 191, 0.30); }
  50% { box-shadow: 0 4px 30px rgba(232, 160, 191, 0.50); }
  100% { box-shadow: 0 4px 20px rgba(232, 160, 191, 0.30); }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-16px); }
  60% { transform: translateY(-8px); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes flipCard {
  0% { transform: rotateY(0deg); }
  50% { transform: rotateY(90deg); }
  100% { transform: rotateY(0deg); }
}

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

@keyframes float {
  0% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(8px, -8px) rotate(120deg); }
  66% { transform: translate(-8px, 8px) rotate(240deg); }
  100% { transform: translate(0, 0) rotate(360deg); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

@keyframes gentlePulse {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.02); }
}


/* ──── 工具类 ──── */
.pulse { animation: pulse 2.5s ease-in-out infinite; }
.bounce { animation: bounce 1s ease-in-out; }
.fade-in { animation: fadeIn 0.5s ease-out; }
.fade-in-up { animation: fadeInUp 0.6s ease-out; }
.scale-in { animation: scaleIn 0.4s ease-out; }
.flip-card { animation: flipCard 0.8s ease-in-out; }
.count-up { animation: countUp 0.4s ease-out; }
.shake { animation: shake 0.3s ease; }

/* ──── 页面过渡 ──── */
.page { transition: all 0.5s var(--transition-smooth); }
.page.active { animation: fadeIn 0.5s ease-out; }

/* ──── 按钮交互 ──── */
.btn { transition: all 0.3s var(--transition-bounce); }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(0.98); }

/* ──── 选项卡片──── */
.option { transition: all 0.3s var(--transition-bounce); }
.option:hover { transform: translateY(-2px); }
.option.selected { animation: scaleIn 0.3s ease-out; }

/* ──── 指数条动画 ──── */
.index-fill { transition: width 1s var(--transition-smooth); }

/* ──── 加载动画 ──── */
.loading-spinner { animation: spin 0.9s linear infinite; }

/* ──── 进度条 ──── */
.progress-fill { transition: width 0.5s var(--transition-smooth); }

/* ──── 模态框 ──── */
.modal { transition: all 0.3s var(--transition-smooth); }
.modal.active { animation: fadeIn 0.3s ease-out; }
.modal.active .modal-content { animation: scaleIn 0.35s var(--transition-spring); }