/* =========================================================
   统一动画系统 - Enhanced Animation Framework
   为整个应用提供一致、高性能的动画体验
========================================================= */

/* =========================================================
   CSS 自定义属性 - 动画配置
========================================================= */
:root {
  /* 动画时长 */
  --duration-fast: 0.15s;
  --duration-normal: 0.3s;
  --duration-slow: 0.5s;
  --duration-slower: 0.8s;
  
  /* 缓动函数 */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-back: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-expo: cubic-bezier(0.16, 1, 0.3, 1);
  
  /* 阴影层级 */
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-strong: 0 8px 24px rgba(0, 0, 0, 0.15);
  --shadow-dramatic: 0 16px 48px rgba(0, 0, 0, 0.2);
  
  /* 动画距离 */
  --translate-sm: 4px;
  --translate-md: 8px;
  --translate-lg: 16px;
  --translate-xl: 24px;
}

/* =========================================================
   性能优化基础类
========================================================= */
.gpu-accelerated {
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}

.will-change-transform {
  will-change: transform;
}

.will-change-opacity {
  will-change: opacity;
}

.will-change-auto {
  will-change: auto;
}

/* =========================================================
   通用动画类 - 淡入淡出
========================================================= */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translate3d(0, var(--translate-lg), 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translate3d(0, calc(-1 * var(--translate-lg)), 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translate3d(calc(-1 * var(--translate-lg)), 0, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translate3d(var(--translate-lg), 0, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

/* =========================================================
   缩放动画
========================================================= */
@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale3d(0.8, 0.8, 1);
  }
  to {
    opacity: 1;
    transform: scale3d(1, 1, 1);
  }
}

@keyframes zoomOut {
  from {
    opacity: 1;
    transform: scale3d(1, 1, 1);
  }
  to {
    opacity: 0;
    transform: scale3d(0.8, 0.8, 1);
  }
}

@keyframes pulseScale {
  0%, 100% {
    transform: scale3d(1, 1, 1);
  }
  50% {
    transform: scale3d(1.05, 1.05, 1);
  }
}

@keyframes heartbeat {
  0%, 100% {
    transform: scale3d(1, 1, 1);
  }
  14% {
    transform: scale3d(1.15, 1.15, 1);
  }
  28% {
    transform: scale3d(1, 1, 1);
  }
  42% {
    transform: scale3d(1.15, 1.15, 1);
  }
  70% {
    transform: scale3d(1, 1, 1);
  }
}

/* =========================================================
   旋转和摆动动画
========================================================= */
@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes wobble {
  0% {
    transform: translate3d(0, 0, 0);
  }
  15% {
    transform: translate3d(-25%, 0, 0) rotate3d(0, 0, 1, -5deg);
  }
  30% {
    transform: translate3d(20%, 0, 0) rotate3d(0, 0, 1, 3deg);
  }
  45% {
    transform: translate3d(-15%, 0, 0) rotate3d(0, 0, 1, -3deg);
  }
  60% {
    transform: translate3d(10%, 0, 0) rotate3d(0, 0, 1, 2deg);
  }
  75% {
    transform: translate3d(-5%, 0, 0) rotate3d(0, 0, 1, -1deg);
  }
  100% {
    transform: translate3d(0, 0, 0);
  }
}

@keyframes swing {
  20% {
    transform: rotate3d(0, 0, 1, 15deg);
  }
  40% {
    transform: rotate3d(0, 0, 1, -10deg);
  }
  60% {
    transform: rotate3d(0, 0, 1, 5deg);
  }
  80% {
    transform: rotate3d(0, 0, 1, -5deg);
  }
  100% {
    transform: rotate3d(0, 0, 1, 0deg);
  }
}

/* =========================================================
   弹性动画
========================================================= */
@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale3d(0.3, 0.3, 1);
  }
  20% {
    transform: scale3d(1.1, 1.1, 1);
  }
  40% {
    transform: scale3d(0.9, 0.9, 1);
  }
  60% {
    opacity: 1;
    transform: scale3d(1.03, 1.03, 1);
  }
  80% {
    transform: scale3d(0.97, 0.97, 1);
  }
  100% {
    opacity: 1;
    transform: scale3d(1, 1, 1);
  }
}

@keyframes bounceInUp {
  0% {
    opacity: 0;
    transform: translate3d(0, 100%, 0) scale3d(1, 1, 1);
  }
  60% {
    opacity: 1;
    transform: translate3d(0, -8px, 0) scale3d(1, 1, 1);
  }
  75% {
    transform: translate3d(0, 4px, 0) scale3d(1, 1, 1);
  }
  90% {
    transform: translate3d(0, -2px, 0) scale3d(1, 1, 1);
  }
  100% {
    transform: translate3d(0, 0, 0) scale3d(1, 1, 1);
  }
}

/* =========================================================
   涟漪效果
========================================================= */
@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 0.6;
  }
  100% {
    transform: scale(4);
    opacity: 0;
  }
}

@keyframes rippleWave {
  0% {
    box-shadow: 0 0 0 0 currentColor;
    opacity: 1;
  }
  50% {
    opacity: 0.8;
  }
  100% {
    box-shadow: 0 0 0 20px transparent;
    opacity: 0;
  }
}

/* =========================================================
   加载动画
========================================================= */
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes spinPulse {
  0% {
    transform: rotate(0deg) scale(1);
    opacity: 1;
  }
  50% {
    transform: rotate(180deg) scale(0.8);
    opacity: 0.8;
  }
  100% {
    transform: rotate(360deg) scale(1);
    opacity: 1;
  }
}

@keyframes dots {
  0%, 80%, 100% {
    transform: scale(0);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* =========================================================
   闪烁和高亮动画
========================================================= */
@keyframes flash {
  0%, 50%, 100% {
    opacity: 1;
  }
  25%, 75% {
    opacity: 0.3;
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 5px currentColor;
  }
  50% {
    box-shadow: 0 0 20px currentColor, 0 0 30px currentColor;
  }
}

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

/* =========================================================
   通用动画应用类
========================================================= */
.animate-fadeIn {
  animation: fadeIn var(--duration-normal) var(--ease-smooth) both;
}

.animate-fadeInUp {
  animation: fadeInUp var(--duration-normal) var(--ease-smooth) both;
}

.animate-fadeInDown {
  animation: fadeInDown var(--duration-normal) var(--ease-smooth) both;
}

.animate-fadeInLeft {
  animation: fadeInLeft var(--duration-normal) var(--ease-smooth) both;
}

.animate-fadeInRight {
  animation: fadeInRight var(--duration-normal) var(--ease-smooth) both;
}

.animate-zoomIn {
  animation: zoomIn var(--duration-normal) var(--ease-bounce) both;
}

.animate-bounceIn {
  animation: bounceIn var(--duration-slow) var(--ease-bounce) both;
}

.animate-bounceInUp {
  animation: bounceInUp var(--duration-slow) var(--ease-bounce) both;
}

.animate-pulse {
  animation: pulseScale 2s var(--ease-smooth) infinite;
}

.animate-heartbeat {
  animation: heartbeat 1.5s var(--ease-smooth) infinite;
}

.animate-wobble {
  animation: wobble 1s var(--ease-smooth);
}

.animate-swing {
  animation: swing 1s var(--ease-smooth);
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-spinPulse {
  animation: spinPulse 2s var(--ease-smooth) infinite;
}

.animate-flash {
  animation: flash 2s var(--ease-smooth) infinite;
}

.animate-glow {
  animation: glow 2s var(--ease-smooth) infinite;
}

/* =========================================================
   动画延迟类
========================================================= */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }
.delay-700 { animation-delay: 0.7s; }
.delay-1000 { animation-delay: 1s; }

/* =========================================================
   交互动画 - 悬停和激活状态
========================================================= */
.hover-lift {
  transition: transform var(--duration-fast) var(--ease-smooth),
              box-shadow var(--duration-fast) var(--ease-smooth);
}

.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.hover-lift:active {
  transform: translateY(0);
  transition-duration: var(--duration-fast);
}

.hover-scale {
  transition: transform var(--duration-fast) var(--ease-smooth);
}

.hover-scale:hover {
  transform: scale(1.05);
}

.hover-scale:active {
  transform: scale(0.98);
}

.hover-glow {
  position: relative;
  transition: box-shadow var(--duration-normal) var(--ease-smooth);
}

.hover-glow::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: inherit;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-smooth);
  pointer-events: none;
  z-index: -1;
}

.hover-glow:hover::before {
  opacity: 0.1;
  box-shadow: 0 0 20px currentColor;
}

/* =========================================================
   涟漪效果组件
========================================================= */
.ripple-container {
  position: relative;
  overflow: hidden;
}

.ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.6);
  pointer-events: none;
  animation: ripple 0.6s linear;
}

/* =========================================================
   滑动和滚动动画
========================================================= */
@keyframes slideInFromLeft {
  from {
    transform: translate3d(-100%, 0, 0);
    opacity: 0;
  }
  to {
    transform: translate3d(0, 0, 0);
    opacity: 1;
  }
}

@keyframes slideInFromRight {
  from {
    transform: translate3d(100%, 0, 0);
    opacity: 0;
  }
  to {
    transform: translate3d(0, 0, 0);
    opacity: 1;
  }
}

@keyframes slideOutToLeft {
  from {
    transform: translate3d(0, 0, 0);
    opacity: 1;
  }
  to {
    transform: translate3d(-100%, 0, 0);
    opacity: 0;
  }
}

@keyframes slideOutToRight {
  from {
    transform: translate3d(0, 0, 0);
    opacity: 1;
  }
  to {
    transform: translate3d(100%, 0, 0);
    opacity: 0;
  }
}

.animate-slideInLeft {
  animation: slideInFromLeft var(--duration-normal) var(--ease-smooth) both;
}

.animate-slideInRight {
  animation: slideInFromRight var(--duration-normal) var(--ease-smooth) both;
}

.animate-slideOutLeft {
  animation: slideOutToLeft var(--duration-normal) var(--ease-smooth) both;
}

.animate-slideOutRight {
  animation: slideOutToRight var(--duration-normal) var(--ease-smooth) both;
}

/* =========================================================
   页面转场动画
========================================================= */
.page-transition-enter {
  animation: fadeInUp var(--duration-slow) var(--ease-smooth) both;
}

.page-transition-exit {
  animation: fadeOut var(--duration-normal) var(--ease-smooth) both;
}

/* =========================================================
   卡片动画增强
========================================================= */
.card-hover {
  transition: all var(--duration-normal) var(--ease-smooth);
  transform: translateZ(0);
}

.card-hover:hover {
  transform: translateY(-4px) translateZ(0);
  box-shadow: var(--shadow-strong);
}

.card-hover:active {
  transform: translateY(-2px) translateZ(0);
  transition-duration: var(--duration-fast);
}

/* =========================================================
   按钮动画增强
========================================================= */
.btn-enhanced {
  position: relative;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-smooth);
  transform: translateZ(0);
}

.btn-enhanced::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left var(--duration-slow) var(--ease-smooth);
}

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

.btn-enhanced:hover {
  transform: translateY(-1px) translateZ(0);
  box-shadow: var(--shadow-medium);
}

.btn-enhanced:active {
  transform: translateY(0) translateZ(0);
  transition-duration: var(--duration-fast);
}

/* =========================================================
   输入框动画增强
========================================================= */
.input-enhanced {
  transition: all var(--duration-normal) var(--ease-smooth);
  position: relative;
}

.input-enhanced:focus {
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

.input-enhanced::placeholder {
  transition: opacity var(--duration-normal) var(--ease-smooth);
}

.input-enhanced:focus::placeholder {
  opacity: 0.6;
}

/* =========================================================
   模态框动画增强
========================================================= */
.modal-backdrop-enhanced {
  animation: fadeIn var(--duration-normal) var(--ease-smooth) both;
}

.modal-content-enhanced {
  animation: bounceIn var(--duration-slow) var(--ease-bounce) both;
}

.modal-exit .modal-backdrop-enhanced {
  animation: fadeOut var(--duration-normal) var(--ease-smooth) both;
}

.modal-exit .modal-content-enhanced {
  animation: zoomOut var(--duration-normal) var(--ease-smooth) both;
}

/* =========================================================
   导航动画增强
========================================================= */
.nav-item-enhanced {
  transition: all var(--duration-normal) var(--ease-smooth);
  position: relative;
}

.nav-item-enhanced::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: currentColor;
  transition: all var(--duration-normal) var(--ease-smooth);
  transform: translateX(-50%);
}

.nav-item-enhanced.active::after {
  width: 100%;
}

.nav-item-enhanced:hover {
  transform: translateY(-1px);
}

/* =========================================================
   加载状态动画
========================================================= */
.loading-skeleton {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.1) 25%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.1) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
}

.loading-dots::after {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  animation: dots 1.4s infinite both;
  margin-left: 4px;
}

.loading-dots::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  animation: dots 1.4s infinite both;
  margin-right: 4px;
  animation-delay: -0.32s;
}

/* =========================================================
   滚动触发动画
========================================================= */
.scroll-reveal {
  opacity: 0;
  transform: translateY(var(--translate-lg));
  transition: all var(--duration-slow) var(--ease-smooth);
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.scroll-reveal-left {
  opacity: 0;
  transform: translateX(calc(-1 * var(--translate-lg)));
  transition: all var(--duration-slow) var(--ease-smooth);
}

.scroll-reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.scroll-reveal-right {
  opacity: 0;
  transform: translateX(var(--translate-lg));
  transition: all var(--duration-slow) var(--ease-smooth);
}

.scroll-reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

/* =========================================================
   可访问性支持 - 减少动画
========================================================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .scroll-reveal,
  .scroll-reveal-left,
  .scroll-reveal-right {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* =========================================================
   深色模式动画优化
========================================================= */
@media (prefers-color-scheme: dark) {
  :root {
    --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-strong: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-dramatic: 0 16px 48px rgba(0, 0, 0, 0.5);
  }
  
  .loading-skeleton {
    background: linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.05) 25%,
      rgba(255, 255, 255, 0.1) 50%,
      rgba(255, 255, 255, 0.05) 75%
    );
  }
}

/* =========================================================
   响应式动画优化
========================================================= */
@media (max-width: 768px) {
  :root {
    --duration-fast: 0.1s;
    --duration-normal: 0.2s;
    --duration-slow: 0.3s;
    --duration-slower: 0.5s;
    
    --translate-sm: 2px;
    --translate-md: 4px;
    --translate-lg: 8px;
    --translate-xl: 12px;
  }
  
  .hover-lift:hover {
    transform: translateY(-1px);
  }
  
  .card-hover:hover {
    transform: translateY(-2px) translateZ(0);
  }
}

@media (max-width: 480px) {
  :root {
    --duration-fast: 0.08s;
    --duration-normal: 0.15s;
    --duration-slow: 0.25s;
    --duration-slower: 0.4s;
  }
}

/* =========================================================
   触摸设备优化
========================================================= */
@media (hover: none) {
  .hover-lift:hover,
  .hover-scale:hover,
  .hover-glow:hover,
  .card-hover:hover,
  .btn-enhanced:hover,
  .nav-item-enhanced:hover {
    transform: none;
    box-shadow: inherit;
  }
  
  .hover-lift:active,
  .card-hover:active {
    transform: translateY(-1px) translateZ(0);
  }
  
  .hover-scale:active {
    transform: scale(0.98);
  }
}

/* =========================================================
   高对比度模式支持
========================================================= */
@media (prefers-contrast: high) {
  .ripple-effect {
    background: rgba(0, 0, 0, 0.8);
  }
  
  .loading-skeleton {
    background: linear-gradient(
      90deg,
      rgba(0, 0, 0, 0.1) 25%,
      rgba(0, 0, 0, 0.2) 50%,
      rgba(0, 0, 0, 0.1) 75%
    );
  }
}