/* ========================================
   Animations - 动画效果
   ======================================== */

/* 滚动触发动画 */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* 交错动画 */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* Hero 标题动画 */
.hero-title .title-line {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease-out forwards;
}

.hero-title .title-line:nth-child(1) { animation-delay: 0.2s; }
.hero-title .title-line:nth-child(2) { animation-delay: 0.4s; }
.hero-title .title-line:nth-child(3) { animation-delay: 0.6s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 渐入动画 */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

/* 缩放渐入 */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.scale-in {
  animation: scaleIn 0.5s ease-out forwards;
}

/* 滑入动画 */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in-left {
  animation: slideInLeft 0.6s ease-out forwards;
}

.slide-in-right {
  animation: slideInRight 0.6s ease-out forwards;
}

/* 数字计数动画 */
@keyframes countUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.stat-number {
  animation: countUp 0.5s ease-out forwards;
}

/* 卡片发光效果 */
.card-glow {
  position: relative;
}

.card-glow::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, transparent, var(--accent-primary), transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  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;
}

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

/* 渐变文字动画 */
@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.gradient-text-animate {
  background: linear-gradient(90deg, #6366f1, #8b5cf6, #ec4899, #6366f1);
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 4s ease infinite;
}

/* 脉冲动画 */
@keyframes pulse {
  0%, 100% { 
    opacity: 1;
    transform: scale(1);
  }
  50% { 
    opacity: 0.7;
    transform: scale(1.05);
  }
}

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

/* 浮动动画 */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.float {
  animation: float 3s ease-in-out infinite;
}

/* 旋转动画 */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.spin {
  animation: spin 2s linear infinite;
}

/* 闪烁动画 */
@keyframes twinkle {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

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

/* 边框流动效果 */
@keyframes borderFlow {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

.border-flow {
  position: relative;
}

.border-flow::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: linear-gradient(90deg, #6366f1, #8b5cf6, #ec4899, #6366f1);
  background-size: 200% 100%;
  z-index: -1;
  animation: borderFlow 3s linear infinite;
}

/* 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;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

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

/* 加载动画 */
@keyframes loading {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: loading 1s linear infinite;
}

/* 骨架屏动画 */
@keyframes skeletonLoading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-elevated) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: skeletonLoading 1.5s infinite;
}

/* 视差滚动效果 */
.parallax {
  will-change: transform;
  transform: translateZ(0);
}

/* 模糊进入效果 */
@keyframes blurIn {
  from {
    opacity: 0;
    filter: blur(10px);
  }
  to {
    opacity: 1;
    filter: blur(0);
  }
}

.blur-in {
  animation: blurIn 0.8s ease-out forwards;
}

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

.bounce-in {
  animation: bounceIn 0.6s ease-out forwards;
}

/* 导航链接下划线动画 */
.nav-link-underline {
  position: relative;
}

.nav-link-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

.nav-link-underline:hover::after {
  width: 100%;
}

/* 图片悬停缩放 */
.img-zoom {
  overflow: hidden;
}

.img-zoom img {
  transition: transform 0.5s ease;
}

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

/* 列表项依次显示 */
.list-animate > * {
  opacity: 0;
  transform: translateY(20px);
}

.list-animate.animate > * {
  animation: fadeInUp 0.5s ease-out forwards;
}

.list-animate.animate > *:nth-child(1) { animation-delay: 0.1s; }
.list-animate.animate > *:nth-child(2) { animation-delay: 0.2s; }
.list-animate.animate > *:nth-child(3) { animation-delay: 0.3s; }
.list-animate.animate > *:nth-child(4) { animation-delay: 0.4s; }
.list-animate.animate > *:nth-child(5) { animation-delay: 0.5s; }
.list-animate.animate > *:nth-child(6) { animation-delay: 0.6s; }