/* 
 * JYD模型网站现代效果增强
 * 提供平滑过渡和现代UI效果
 */

/* 全局渐入动画 */
@keyframes fadeIn {
  from { 
    opacity: 0;
    transform: translateY(20px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* 交错渐入动画 */
.stagger-item {
  opacity: 0;
}

.stagger-item.visible {
  animation: fadeIn 0.5s ease-out forwards;
}

/* 平滑滚动 */
html {
  scroll-behavior: smooth;
}

/* 图像悬停效果增强 */
.hover-zoom {
  overflow: hidden;
}

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

.hover-zoom:hover img {
  transform: scale(1.05);
  filter: brightness(1.05);
}

/* 卡片悬停效果增强 */
.hover-lift {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

/* 按钮悬停效果增强 */
.button-glow {
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.button-glow:after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255,255,255,0.2);
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  z-index: -1;
}

.button-glow:hover:after {
  transform: translateX(0);
}

/* 现代阴影效果 */
.shadow-soft {
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.1);
}

.shadow-strong {
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.2);
}

/* 渐变背景 */
.gradient-bg {
  background: linear-gradient(135deg, #1C244B 0%, #2A3A6D 100%);
}

/* 图片半透明遮罩 */
.img-overlay {
  position: relative;
}

.img-overlay:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.7) 100%);
  z-index: 1;
}

/* 性能优化 */
img, video {
  will-change: transform;
}

.hardware-accelerated {
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* 响应式文本 */
.responsive-text-sm {
  font-size: clamp(0.8rem, 0.7rem + 0.5vw, 1rem);
}

.responsive-text-md {
  font-size: clamp(1rem, 0.9rem + 0.5vw, 1.2rem);
}

.responsive-text-lg {
  font-size: clamp(1.5rem, 1.2rem + 1.5vw, 2.5rem);
}

/* 现代按钮样式 */
.btn-modern {
  padding: 12px 24px;
  border-radius: 6px;
  border: none;
  font-weight: 600;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-modern:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255,255,255,0.1);
  transform: translateX(-100%) rotate(45deg);
  transition: transform 0.5s ease;
}

.btn-modern:hover:before {
  transform: translateX(100%) rotate(45deg);
}

.btn-primary-modern {
  background-color: #1C244B;
  color: white;
}

.btn-primary-modern:hover {
  background-color: #2A3A6D;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(28, 36, 75, 0.3);
}

/* 深色模式 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #121212;
    --text-color: #f0f0f0;
    --heading-color: #ffffff;
    --card-bg: #ffffff;
    --border-color: #ddd;
  }
  
  body.dark-mode-support {
    background-color: var(--bg-color);
    color: var(--text-color);
  }
  
  body.dark-mode-support h1, 
  body.dark-mode-support h2, 
  body.dark-mode-support h3, 
  body.dark-mode-support h4 {
    color: var(--heading-color);
  }
  
  body.dark-mode-support .card,
  body.dark-mode-support .expertise-card,
  body.dark-mode-support .model-type-card,
  body.dark-mode-support .technology-card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: #333;
  }
  
  body.dark-mode-support .card h3,
  body.dark-mode-support .expertise-card h3,
  body.dark-mode-support .model-type-card h3,
  body.dark-mode-support .technology-card h3 {
    color: #1C244B;
  }
}

/* 加载动画 */
.loading-spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid rgba(28, 36, 75, 0.1);
  border-radius: 50%;
  border-top-color: #1C244B;
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 顺滑滚动指示器 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: linear-gradient(90deg, #1C244B, #4B6CDA);
  z-index: 9999;
  transition: width 0.1s ease;
}