/* ===== 页面加载动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

/* ===== 动画类 ===== */
.animate-fade-in-up {
  animation: fadeInUp 0.8s ease-out forwards;
}

.animate-fade-in-left {
  animation: fadeInLeft 0.8s ease-out forwards;
}

.animate-fade-in-right {
  animation: fadeInRight 0.8s ease-out forwards;
}

.animate-scale-in {
  animation: scaleIn 0.6s ease-out forwards;
}

.animate-slide-in-bottom {
  animation: slideInFromBottom 0.8s ease-out forwards;
}

/* ===== 延迟动画 ===== */
.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-600 { animation-delay: 0.6s; }
.delay-700 { animation-delay: 0.7s; }
.delay-800 { animation-delay: 0.8s; }

/* ===== 初始隐藏状态 ===== */
.animate-fade-in-up,
.animate-fade-in-left,
.animate-fade-in-right,
.animate-scale-in,
.animate-slide-in-bottom {
  opacity: 0;
}

/* ===== 悬停动画增强 ===== */
.feature-card {
  transition: all var(--transition-normal), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover {
  transform: translateY(-8px) scale(1.02);
}

.btn,
.download-btn,
button[type="submit"] {
  transition: all var(--transition-normal), transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:hover,
.download-btn:hover,
button[type="submit"]:hover {
  transform: translateY(-3px) scale(1.03);
}

/* ===== 导航栏动画增强 ===== */
nav a {
  transition: all var(--transition-normal), transform 0.2s ease;
}

nav a:hover {
  transform: translateY(-2px);
}

nav a::after {
  transition: width var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
}

/* ===== 图片悬停效果 ===== */
.hero-img svg,
.hero-img img {
  transition: all var(--transition-normal), transform 0.3s ease;
}

.hero-img:hover svg,
.hero-img:hover img {
  transform: scale(1.05);
}

/* ===== 页面滚动动画 ===== */
.scroll-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

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

/* ===== 加载状态动画 ===== */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.loading {
  animation: pulse 1.5s ease-in-out infinite;
}

/* ===== 成功状态动画 ===== */
@keyframes success {
  0% {
    transform: scale(0.8);
    opacity: 0;
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.success-animation {
  animation: success 0.6s ease-out forwards;
}

/* ===== 响应式动画调整 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .animate-fade-in-up,
  .animate-fade-in-left,
  .animate-fade-in-right,
  .animate-scale-in,
  .animate-slide-in-bottom {
    animation: none;
    opacity: 1;
  }
}