/* 2024长三角国际新能源汽车与智能交通产业博览会 - 高级动画样式 */

/* ============================================
   字体图标引入
   ============================================ */
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css');

/* ============================================
   自定义字体
   ============================================ */
@font-face {
  font-family: 'TechFont';
  src: url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&display=swap');
}

/* ============================================
   核心动画变量
   ============================================ */
:root {
  /* 动画时长 */
  --anim-fast: 0.2s;
  --anim-normal: 0.3s;
  --anim-slow: 0.5s;
  --anim-slower: 0.8s;
  --anim-slowest: 1.2s;
  
  /* 缓动函数 */
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-sharp: cubic-bezier(0.4, 0, 0.6, 1);
  
  /* 渐变色 */
  --gradient-electric: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-ocean: linear-gradient(135deg, #667eea 0%, #42e695 100%);
  --gradient-sunset: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --gradient-aurora: linear-gradient(135deg, #42e695 0%, #3bb2b8 100%);
}

/* ============================================
   基础动画类
   ============================================ */
/* 淡入向上动画 */
.animate-fadeInUp {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease-out forwards;
}

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

/* 淡入向左动画 */
.animate-fadeInLeft {
  opacity: 0;
  transform: translateX(-30px);
  animation: fadeInLeft 0.8s ease-out forwards;
}

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

/* 淡入向右动画 */
.animate-fadeInRight {
  opacity: 0;
  transform: translateX(30px);
  animation: fadeInRight 0.8s ease-out forwards;
}

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

/* 动画延迟类 */
.animation-delay-100 { animation-delay: 0.1s; }
.animation-delay-200 { animation-delay: 0.2s; }
.animation-delay-300 { animation-delay: 0.3s; }
.animation-delay-400 { animation-delay: 0.4s; }
.animation-delay-500 { animation-delay: 0.5s; }
.animation-delay-600 { animation-delay: 0.6s; }
.animation-delay-700 { animation-delay: 0.7s; }
.animation-delay-800 { animation-delay: 0.8s; }
.animation-delay-900 { animation-delay: 0.9s; }
.animation-delay-1000 { animation-delay: 1s; }
.animation-delay-1100 { animation-delay: 1.1s; }
.animation-delay-2000 { animation-delay: 2s; }
.animation-delay-4000 { animation-delay: 4s; }

/* ============================================
   页面加载动画
   ============================================ */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeOut 0.5s ease-out 1s forwards;
}

.loader-content {
  text-align: center;
}

.loader-logo {
  width: 100px;
  height: 100px;
  margin: 0 auto 20px;
  background: white;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulse 1s infinite;
}

.loader-text {
  color: white;
  font-size: 1.2rem;
  animation: fadeInUp 0.5s ease-out;
}

.loader-progress {
  width: 200px;
  height: 4px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 2px;
  margin: 20px auto;
  overflow: hidden;
}

.loader-progress-bar {
  width: 0%;
  height: 100%;
  background: white;
  animation: loading 1s ease-out forwards;
}

@keyframes loading {
  to { width: 100%; }
}

/* ============================================
   入场动画
   ============================================ */
.fade-in {
  opacity: 0;
  animation: fadeIn var(--anim-slow) ease-out forwards;
}

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

.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp var(--anim-slow) ease-out forwards;
}

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

.fade-in-down {
  opacity: 0;
  transform: translateY(-30px);
  animation: fadeInDown var(--anim-slow) ease-out forwards;
}

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

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  animation: fadeInLeft var(--anim-slow) ease-out forwards;
}

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

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  animation: fadeInRight var(--anim-slow) ease-out forwards;
}

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

/* ============================================
   缩放动画
   ============================================ */
.zoom-in {
  opacity: 0;
  transform: scale(0.8);
  animation: zoomIn var(--anim-slow) var(--ease-bounce) forwards;
}

@keyframes zoomIn {
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.zoom-out {
  opacity: 0;
  transform: scale(1.2);
  animation: zoomOut var(--anim-slow) var(--ease-bounce) forwards;
}

@keyframes zoomOut {
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ============================================
   旋转动画
   ============================================ */
.rotate-in {
  opacity: 0;
  transform: rotate(-180deg) scale(0.8);
  animation: rotateIn var(--anim-slow) var(--ease-bounce) forwards;
}

@keyframes rotateIn {
  to {
    opacity: 1;
    transform: rotate(0) scale(1);
  }
}

.flip-in-x {
  opacity: 0;
  transform: rotateX(-90deg);
  animation: flipInX var(--anim-slow) ease-out forwards;
}

@keyframes flipInX {
  to {
    opacity: 1;
    transform: rotateX(0);
  }
}

.flip-in-y {
  opacity: 0;
  transform: rotateY(-90deg);
  animation: flipInY var(--anim-slow) ease-out forwards;
}

@keyframes flipInY {
  to {
    opacity: 1;
    transform: rotateY(0);
  }
}

/* ============================================
   弹跳动画
   ============================================ */
.bounce-in {
  opacity: 0;
  transform: scale(0.3);
  animation: bounceIn var(--anim-slower) var(--ease-bounce) forwards;
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* ============================================
   悬停效果
   ============================================ */
.hover-grow {
  transition: transform var(--anim-normal) var(--ease-smooth);
}

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

.hover-shrink {
  transition: transform var(--anim-normal) var(--ease-smooth);
}

.hover-shrink:hover {
  transform: scale(0.95);
}

.hover-rotate {
  transition: transform var(--anim-normal) var(--ease-smooth);
}

.hover-rotate:hover {
  transform: rotate(5deg);
}

.hover-lift {
  transition: all var(--anim-normal) var(--ease-smooth);
}

.hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.hover-sink {
  transition: all var(--anim-normal) var(--ease-smooth);
}

.hover-sink:hover {
  transform: translateY(3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* ============================================
   按钮悬停效果
   ============================================ */
.btn-hover-fill {
  position: relative;
  overflow: hidden;
  transition: color var(--anim-normal);
  z-index: 1;
}

.btn-hover-fill::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-electric);
  transition: left var(--anim-normal) var(--ease-smooth);
  z-index: -1;
}

.btn-hover-fill:hover::before {
  left: 0;
}

.btn-hover-fill:hover {
  color: white;
}

/* 按钮波纹效果 */
.btn-ripple {
  position: relative;
  overflow: hidden;
}

.btn-ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-ripple:active::after {
  width: 300px;
  height: 300px;
}

/* 按钮发光效果 */
.btn-glow {
  transition: all var(--anim-normal);
}

.btn-glow:hover {
  box-shadow: 0 0 20px rgba(102, 126, 234, 0.6),
              0 0 40px rgba(102, 126, 234, 0.4),
              0 0 60px rgba(102, 126, 234, 0.2);
}

/* ============================================
   图片悬停效果
   ============================================ */
.img-hover-zoom {
  overflow: hidden;
}

.img-hover-zoom img {
  transition: transform var(--anim-slow) var(--ease-smooth);
}

.img-hover-zoom:hover img {
  transform: scale(1.1);
}

.img-hover-rotate {
  overflow: hidden;
}

.img-hover-rotate img {
  transition: transform var(--anim-slow) var(--ease-smooth);
}

.img-hover-rotate:hover img {
  transform: scale(1.1) rotate(3deg);
}

.img-hover-blur {
  overflow: hidden;
}

.img-hover-blur img {
  transition: all var(--anim-slow) var(--ease-smooth);
}

.img-hover-blur:hover img {
  filter: blur(3px);
  transform: scale(1.1);
}

/* 图片叠加效果 */
.img-overlay {
  position: relative;
  overflow: hidden;
}

.img-overlay::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.8), rgba(118, 75, 162, 0.8));
  opacity: 0;
  transition: opacity var(--anim-normal);
  z-index: 1;
}

.img-overlay:hover::before {
  opacity: 1;
}

.img-overlay-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  text-align: center;
  opacity: 0;
  transition: opacity var(--anim-normal);
  z-index: 2;
}

.img-overlay:hover .img-overlay-content {
  opacity: 1;
}

/* ============================================
   文字动画
   ============================================ */
.text-glow {
  animation: textGlow 2s ease-in-out infinite alternate;
}

@keyframes textGlow {
  from {
    text-shadow: 0 0 10px rgba(102, 126, 234, 0.5),
                 0 0 20px rgba(102, 126, 234, 0.3);
  }
  to {
    text-shadow: 0 0 20px rgba(102, 126, 234, 0.8),
                 0 0 30px rgba(102, 126, 234, 0.5);
  }
}

.text-typing {
  overflow: hidden;
  border-right: 2px solid;
  white-space: nowrap;
  animation: typing 3.5s steps(40, end),
             blink-caret 0.75s step-end infinite;
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: currentColor; }
}

.text-gradient-animate {
  background: linear-gradient(90deg, #667eea, #764ba2, #42e695, #667eea);
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientMove 5s ease infinite;
}

@keyframes gradientMove {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ============================================
   卡片动画
   ============================================ */
.card-3d {
  transform-style: preserve-3d;
  transition: transform var(--anim-slow) var(--ease-smooth);
}

.card-3d:hover {
  transform: rotateY(10deg) rotateX(10deg) translateZ(20px);
}

.card-flip {
  position: relative;
  transform-style: preserve-3d;
  transition: transform var(--anim-slow);
}

.card-flip:hover {
  transform: rotateY(180deg);
}

.card-flip-front,
.card-flip-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
}

.card-flip-back {
  transform: rotateY(180deg);
}

/* ============================================
   滚动动画
   ============================================ */
.scroll-reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all var(--anim-slower) var(--ease-smooth);
}

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

.scroll-reveal-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all var(--anim-slower) var(--ease-smooth);
}

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

.scroll-reveal-right {
  opacity: 0;
  transform: translateX(50px);
  transition: all var(--anim-slower) var(--ease-smooth);
}

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

.scroll-reveal-scale {
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--anim-slower) var(--ease-smooth);
}

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

/* ============================================
   视差效果
   ============================================ */
.parallax {
  position: relative;
  transform-style: preserve-3d;
}

.parallax-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.parallax-layer-back {
  transform: translateZ(-1px) scale(2);
}

.parallax-layer-base {
  transform: translateZ(0);
}

.parallax-layer-front {
  transform: translateZ(1px) scale(0.5);
}

/* ============================================
   加载动画
   ============================================ */
.skeleton {
  position: relative;
  overflow: hidden;
  background: #f0f0f0;
}

.skeleton::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
  to {
    left: 100%;
  }
}

/* ============================================
   脉冲动画
   ============================================ */
.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.8;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.pulse-slow {
  animation: pulse 3s infinite;
}

.pulse-fast {
  animation: pulse 1s infinite;
}

/* ============================================
   抖动动画
   ============================================ */
.shake {
  animation: shake 0.5s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-10px); }
  20%, 40%, 60%, 80% { transform: translateX(10px); }
}

.shake-horizontal {
  animation: shakeHorizontal 0.5s;
}

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

/* ============================================
   浮动动画
   ============================================ */
.float {
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.float-slow {
  animation: float 5s ease-in-out infinite;
}

.float-fast {
  animation: float 2s ease-in-out infinite;
}

/* ============================================
   闪烁动画
   ============================================ */
.blink {
  animation: blink 1s infinite;
}

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

.flash {
  animation: flash 0.5s;
}

@keyframes flash {
  0%, 50%, 100% { opacity: 1; }
  25%, 75% { opacity: 0; }
}

/* ============================================
   渐变背景动画
   ============================================ */
.bg-gradient-animate {
  background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ============================================
   光标跟随效果
   ============================================ */
.cursor-follow {
  position: fixed;
  width: 20px;
  height: 20px;
  border: 2px solid #667eea;
  border-radius: 50%;
  pointer-events: none;
  transition: all 0.1s ease;
  z-index: 9999;
}

.cursor-follow.active {
  transform: scale(2);
  background: rgba(102, 126, 234, 0.1);
}

/* ============================================
   工具提示
   ============================================ */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%) scale(0);
  background: #333;
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
  white-space: nowrap;
  opacity: 0;
  transition: all var(--anim-normal) var(--ease-smooth);
  pointer-events: none;
}

.tooltip::before {
  content: '';
  position: absolute;
  bottom: 115%;
  left: 50%;
  transform: translateX(-50%) scale(0);
  border: 6px solid transparent;
  border-top-color: #333;
  opacity: 0;
  transition: all var(--anim-normal) var(--ease-smooth);
}

.tooltip:hover::after,
.tooltip:hover::before {
  transform: translateX(-50%) scale(1);
  opacity: 1;
}

/* ============================================
   交错动画
   ============================================ */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  animation: staggerIn var(--anim-slow) var(--ease-smooth) forwards;
}

.stagger-children > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.5s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.6s; }
.stagger-children > *:nth-child(7) { animation-delay: 0.7s; }
.stagger-children > *:nth-child(8) { animation-delay: 0.8s; }

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

/* ============================================
   模糊背景
   ============================================ */
.blur-background {
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.8);
}

.glass-morphism {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

/* ============================================
   响应式动画
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}