/* ===================================
   研展科技 - 扁平化响应式样式
   =================================== */

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

:root {
  /* 扁平化配色方案 */
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary-color: #64748b;
  --accent-color: #0891b2;
  
  /* 背景色 */
  --bg-white: #ffffff;
  --bg-light: #f8fafc;
  --bg-dark: #1e293b;
  --bg-darker: #0f172a;
  
  /* 文字颜色 */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --text-white: #ffffff;
  
  /* 间距系统 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 2rem;
  --spacing-3xl: 5rem;
  
  /* 边框圆角 */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* 过渡动画 */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* 字体大小 */
  --font-xs: 0.875rem;
  --font-sm: 1rem;
  --font-md: 1.125rem;
  --font-lg: 1.25rem;
  --font-xl: 1.5rem;
  --font-2xl: 1.875rem;
  --font-3xl: 2.25rem;
  --font-4xl: 3rem;
}

/* Base Styles */
html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-white);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ===================================
   导航栏
   =================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: all var(--transition-base);
}

.navbar-scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
}

.nav-brand .logo {
  height: 40px;
  width: auto;
  display: block;
  vertical-align: middle;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--font-sm);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--primary-color);
}

/* 选中状态 */
.nav-link.active {
  color: var(--primary-color);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width var(--transition-base);
}

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

/* ===================================
   二级下拉菜单
   =================================== */

/* 下拉菜单容器 */
.nav-item-dropdown {
  position: relative;
}

.dropdown-toggle {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: 4px;
}

/* 下拉箭头 */
.dropdown-arrow {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-base);
}

.nav-item-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
  -webkit-transform: rotate(180deg);
}

/* 下拉菜单 - 全屏显示 */
.dropdown-menu {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  width: 100%;
  background-color: #f0f4f8;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 1000;
}

.nav-item-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
}

/* 下拉菜单网格 - 1行6列布局 */
.dropdown-grid {
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr 1fr 1fr 1fr 1fr 1fr;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
}

/* 下拉菜单项 */
.dropdown-item {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  background-color: rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-base);
  border: 1px solid transparent;
  position: relative;
  min-height: 140px;
  height: 100%;
}

.dropdown-item:hover {
  background-color: #ffffff;
  -webkit-transform: translateY(-3px);
  -ms-transform: translateY(-3px);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  border-color: rgba(102, 126, 234, 0.2);
}

/* 下拉菜单项图标 - 调整大小 */
.dropdown-item-icon {
  width: 36px;
  height: 36px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  background-color: rgba(102, 126, 234, 0.1);
  border-radius: var(--radius-md);
  color: #667eea;
  margin-bottom: 0;
  flex-shrink: 0;
}

.dropdown-item-icon svg {
  width: 18px;
  height: 18px;
}

/* 下拉菜单项标题 - 调整字体大小 */
.dropdown-item-title {
  font-size: var(--font-xs);
  font-weight: 700;
  color: #1a202c;
  margin: 0;
  line-height: 1.4;
  -webkit-box-flex: 0;
  -ms-flex: 0 0 auto;
  flex: 0 0 auto;
  text-align: center;
}

/* 下拉菜单项描述 - 限制行数 */
.dropdown-item-desc {
  font-size: 0.75rem;
  color: #718096;
  margin: 0;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
}

/* 下拉菜单响应式：中等屏幕 */
@media (max-width: 1200px) and (min-width: 992px) {
  .dropdown-grid {
    gap: var(--spacing-md);
  }
  
  .dropdown-item {
    min-height: 130px;
    padding: var(--spacing-sm);
  }
  
  .dropdown-item-icon {
    width: 32px;
    height: 32px;
  }
  
  .dropdown-item-icon svg {
    width: 16px;
    height: 16px;
  }
  
  .dropdown-item-title {
    font-size: 0.875rem;
  }
  
  .dropdown-item-desc {
    font-size: 0.7rem;
    -webkit-line-clamp: 2;
  }
}

/* 下拉菜单响应式：小屏幕 - 改为2行3列 */
@media (max-width: 991px) and (min-width: 768px) {
  .dropdown-grid {
    -ms-grid-columns: 1fr 1fr 1fr;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
  }
  
  .dropdown-item {
    min-height: 120px;
    padding: var(--spacing-md);
  }
  
  .dropdown-item-icon {
    width: 38px;
    height: 38px;
  }
  
  .dropdown-item-icon svg {
    width: 20px;
    height: 20px;
  }
  
  .dropdown-item-title {
    font-size: var(--font-xs);
    text-align: center;
  }
  
  .dropdown-item-desc {
    font-size: var(--font-xs);
    -webkit-line-clamp: 2;
  }
}

/* 下拉菜单响应式：手机屏幕 - 改为3行2列 */
@media (max-width: 767px) and (min-width: 480px) {
  .dropdown-grid {
    -ms-grid-columns: 1fr 1fr;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
  
  .dropdown-item {
    min-height: 100px;
    padding: var(--spacing-sm);
  }
  
  .dropdown-item-icon {
    width: 32px;
    height: 32px;
  }
  
  .dropdown-item-icon svg {
    width: 16px;
    height: 16px;
  }
  
  .dropdown-item-title {
    font-size: 0.875rem;
  }
  
  .dropdown-item-desc {
    font-size: 0.75rem;
    -webkit-line-clamp: 2;
  }
}

/* 下拉菜单响应式：超小屏幕 - 改为单列 */
@media (max-width: 479px) {
  .dropdown-grid {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  .dropdown-item {
    min-height: 80px;
    padding: var(--spacing-sm);
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
    -ms-flex-direction: row;
    flex-direction: row;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    text-align: left;
  }
  
  .dropdown-item-icon {
    width: 36px;
    height: 36px;
    margin-right: var(--spacing-sm);
    margin-bottom: 0;
  }
  
  .dropdown-item-icon svg {
    width: 18px;
    height: 18px;
  }
  
  .dropdown-item-title {
    font-size: var(--font-sm);
  }
  
  .dropdown-item-desc {
    font-size: 0.75rem;
    -webkit-line-clamp: 1;
  }
}

/* ===================================
   Hero 区域
   =================================== */
/* ===================================
   Hero 区域 - 轮播
   =================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: var(--text-white);
  padding-top: 80px;
  overflow: hidden;
}

.hero-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.slider-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  -webkit-transition: opacity 500ms ease-in-out;
  -moz-transition: opacity 500ms ease-in-out;
  -ms-transition: opacity 500ms ease-in-out;
  -o-transition: opacity 500ms ease-in-out;
  transition: opacity var(--transition-slow) ease-in-out;
}

.slide-active {
  opacity: 1;
}

.slide-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(30, 41, 59, 0.75) 100%);
  z-index: 2;
}

.hero .container {
  position: relative;
  z-index: 3;
  height: 100%;
  display: flex;
  align-items: center;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  animation: fadeInUp 0.8s ease-out;
}

.hero-title {
  font-size: var(--font-4xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  letter-spacing: -1px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: var(--font-xl);
  color: var(--accent-color);
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-description {
  font-size: var(--font-md);
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

/* ===================================
   轮播指示器和箭头
   =================================== */
.slider-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 4;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.dot:hover {
  background-color: rgba(255, 255, 255, 0.6);
}

.dot-active {
  background-color: var(--primary-color);
  width: 36px;
  border-radius: 6px;
  border-color: rgba(255, 255, 255, 0.3);
}

.slider-arrow {
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -moz-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  -o-transform: translateY(-50%);
  transform: translateY(-50%);
  background-color: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: var(--text-white);
  width: 50px;
  height: 50px;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  -webkit-transition: all 150ms ease-in-out;
  -moz-transition: all 150ms ease-in-out;
  -ms-transition: all 150ms ease-in-out;
  -o-transition: all 150ms ease-in-out;
  transition: all var(--transition-fast);
  z-index: 4;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  -webkit-box-align: center;
  -moz-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-justify-content: center;
  -webkit-box-pack: center;
  -moz-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.1); /* Fallback for backdrop-filter */
}

.slider-arrow:hover {
  background-color: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
}

.slider-arrow-prev {
  left: 20px;
}

.slider-arrow-next {
  right: 20px;
}

/* ===================================
   按钮样式
   =================================== */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-xl);
  -webkit-border-radius: var(--radius-md);
  -moz-border-radius: var(--radius-md);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-sm);
  -webkit-transition: all 300ms ease-in-out;
  -moz-transition: all 300ms ease-in-out;
  -ms-transition: all 300ms ease-in-out;
  -o-transition: all 300ms ease-in-out;
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--text-white);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  -webkit-transform: translateY(-2px);
  -moz-transform: translateY(-2px);
  -ms-transform: translateY(-2px);
  -o-transform: translateY(-2px);
  transform: translateY(-2px);
  -webkit-box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  -moz-box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-white);
  border-color: var(--text-white);
}

.btn-secondary:hover {
  background-color: var(--text-white);
  color: var(--primary-color);
  -webkit-transform: translateY(-2px);
  -moz-transform: translateY(-2px);
  -ms-transform: translateY(-2px);
  -o-transform: translateY(-2px);
  transform: translateY(-2px);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: var(--font-md);
}

/* ===================================
   通用 Section 样式
   =================================== */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-light {
  background-color: var(--bg-light);
}

.section-dark {
  background-color: var(--bg-dark);
  color: var(--text-white);
}

.section-accent {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  color: var(--text-white);
}

.section-title {
  font-size: var(--font-3xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.section-dark .section-title,
.section-accent .section-title {
  color: var(--text-white);
}

.section-subtitle {
  font-size: var(--font-lg);
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-content {
  max-width: 900px;
  margin: 0 auto;
}

/* ===================================
   关于我们
   =================================== */
.about-text p {
  font-size: var(--font-md);
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-xl);
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base);
}

.stat-item:hover {
  transform: translateY(-5px);
}

.stat-number {
  font-size: var(--font-4xl);
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===================================
   关于我们 - 图文布局
   =================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--spacing-2xl);
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.about-image {
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-building-img {
  width: 100%;
  height: 400px;
  -o-object-fit: cover;
  object-fit: cover;
  -webkit-border-radius: var(--radius-xl);
  -moz-border-radius: var(--radius-xl);
  border-radius: var(--radius-xl);
  -webkit-box-shadow: 0 10px 25px -3px rgba(0, 0, 0, 0.15);
  -moz-box-shadow: 0 10px 25px -3px rgba(0, 0, 0, 0.15);
  box-shadow: 0 10px 25px -3px rgba(0, 0, 0, 0.15);
  -webkit-transition: -webkit-transform var(--transition-base);
  -moz-transition: -moz-transform var(--transition-base);
  -ms-transition: -ms-transform var(--transition-base);
  -o-transition: -o-transform var(--transition-base);
  transition: transform var(--transition-base);
}

.about-building-img:hover {
  -webkit-transform: scale(1.02);
  -moz-transform: scale(1.02);
  -ms-transform: scale(1.02);
  -o-transform: scale(1.02);
  transform: scale(1.02);
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.about-highlight {
  font-size: var(--font-sm);
  color: var(--primary-color);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about-text {
  font-size: var(--font-md);
  line-height: 1.8;
  color: var(--text-secondary);
}

.about-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.about-feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-sm);
  color: var(--text-primary);
  background-color: var(--bg-white);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.feature-icon {
  display: inline-block;
  width: 20px;
  height: 20px;
  color: var(--primary-color);
  margin-right: var(--spacing-xs);
  vertical-align: middle;
}

.feature-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ===================================
   产品与服务
   =================================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.product-card {
  background-color: var(--bg-darker);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.product-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.product-title {
  font-size: var(--font-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-white);
}

.product-description {
  color: var(--text-light);
  line-height: 1.7;
  font-size: var(--font-sm);
}

/* ===================================
   团队优势
   =================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.feature-item {
  text-align: center;
  padding: var(--spacing-xl);
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.feature-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: var(--font-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: var(--font-sm);
}

/* ===================================
   首页核心优势（专用样式）
   =================================== */
.home-features-grid {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: stretch;
  -ms-flex-align: stretch;
  align-items: stretch;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.home-feature-item {
  -webkit-box-flex: 0;
  -ms-flex: 0 0 calc(25% - var(--spacing-lg) * 0.75);
  flex: 0 0 calc(25% - var(--spacing-lg) * 0.75);
  max-width: calc(25% - var(--spacing-lg) * 0.75);
  text-align: center;
  padding: var(--spacing-xl);
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  -webkit-box-shadow: var(--shadow-md);
  box-shadow: var(--shadow-md);
  -webkit-transition: all var(--transition-base);
  -o-transition: all var(--transition-base);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.home-feature-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: -webkit-gradient(linear, left top, right top, from(var(--primary-color)), to(var(--secondary-color)));
  background: -webkit-linear-gradient(left, var(--primary-color), var(--secondary-color));
  background: -o-linear-gradient(left, var(--primary-color), var(--secondary-color));
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  -webkit-transform: scaleX(0);
  -ms-transform: scaleX(0);
  transform: scaleX(0);
  -webkit-transition: -webkit-transform var(--transition-base);
  transition: -webkit-transform var(--transition-base);
  -o-transition: -o-transform var(--transition-base);
  transition: transform var(--transition-base);
  transition: transform var(--transition-base), -webkit-transform var(--transition-base), -o-transform var(--transition-base);
}

.home-feature-item:hover {
  -webkit-transform: translateY(-8px);
  -ms-transform: translateY(-8px);
  transform: translateY(-8px);
  -webkit-box-shadow: var(--shadow-lg);
  box-shadow: var(--shadow-lg);
}

.home-feature-item:hover::before {
  -webkit-transform: scaleX(1);
  -ms-transform: scaleX(1);
  transform: scaleX(1);
}

.home-feature-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  display: inline-block;
  -webkit-filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
  -webkit-transition: -webkit-transform var(--transition-base);
  transition: -webkit-transform var(--transition-base);
  -o-transition: -o-transform var(--transition-base);
  transition: transform var(--transition-base);
  transition: transform var(--transition-base), -webkit-transform var(--transition-base), -o-transform var(--transition-base);
}

.home-feature-item:hover .home-feature-icon {
  -webkit-transform: scale(1.1);
  -ms-transform: scale(1.1);
  transform: scale(1.1);
}

.home-feature-title {
  font-size: var(--font-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  position: relative;
  display: inline-block;
}

.home-feature-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  -webkit-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary-color);
  -webkit-transition: width var(--transition-base);
  -o-transition: width var(--transition-base);
  transition: width var(--transition-base);
}

.home-feature-item:hover .home-feature-title::after {
  width: 40px;
}

.home-feature-description {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: var(--font-base);
  margin-top: var(--spacing-md);
}

/* 响应式：大屏幕 - 保持4列 */
@media (min-width: 1200px) {
  .home-features-grid {
    -ms-flex-wrap: nowrap;
    flex-wrap: nowrap;
  }
  
  .home-feature-item {
    -webkit-box-flex: 1;
    -ms-flex: 1 1 0;
    flex: 1 1 0;
    max-width: none;
  }
}

/* 响应式：中等屏幕 (992-1200px) */
@media (max-width: 1199px) and (min-width: 992px) {
  .home-features-grid {
    gap: var(--spacing-md);
  }
  
  .home-feature-item {
    -ms-flex: 0 0 calc(25% - var(--spacing-md) * 0.75);
    flex: 0 0 calc(25% - var(--spacing-md) * 0.75);
    max-width: calc(25% - var(--spacing-md) * 0.75);
    padding: var(--spacing-lg);
  }
  
  .home-feature-icon {
    font-size: 3.5rem;
  }
  
  .home-feature-title {
    font-size: var(--font-lg);
  }
  
  .home-feature-description {
    font-size: var(--font-sm);
  }
}

/* 响应式：平板屏幕 (768-991px) */
@media (max-width: 991px) and (min-width: 768px) {
  .home-features-grid {
    gap: var(--spacing-md);
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  
  .home-feature-item {
    -ms-flex: 0 0 calc(50% - var(--spacing-md) * 0.5);
    flex: 0 0 calc(50% - var(--spacing-md) * 0.5);
    max-width: calc(50% - var(--spacing-md) * 0.5);
    padding: var(--spacing-lg);
  }
  
  .home-feature-icon {
    font-size: 3rem;
  }
  
  .home-feature-title {
    font-size: var(--font-lg);
  }
  
  .home-feature-description {
    font-size: var(--font-sm);
  }
}

/* 响应式：小屏幕手机 (480-767px) */
@media (max-width: 767px) and (min-width: 480px) {
  .home-features-grid {
    gap: var(--spacing-sm);
  }
  
  .home-feature-item {
    -ms-flex: 0 0 calc(50% - var(--spacing-sm) * 0.5);
    flex: 0 0 calc(50% - var(--spacing-sm) * 0.5);
    max-width: calc(50% - var(--spacing-sm) * 0.5);
    padding: var(--spacing-md);
  }
  
  .home-feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
  }
  
  .home-feature-title {
    font-size: var(--font-base);
    margin-bottom: var(--spacing-sm);
  }
  
  .home-feature-title::after {
    bottom: -6px;
  }
  
  .home-feature-description {
    font-size: var(--font-xs);
    line-height: 1.6;
    margin-top: var(--spacing-sm);
  }
}

/* 响应式：超小屏幕 (<480px) */
@media (max-width: 479px) {
  .home-features-grid {
    gap: var(--spacing-sm);
  }
  
  .home-feature-item {
    -ms-flex: 0 0 100%;
    flex: 0 0 100%;
    max-width: 100%;
    padding: var(--spacing-md);
  }
  
  .home-feature-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
  }
  
  .home-feature-title {
    font-size: var(--font-sm);
    margin-bottom: var(--spacing-xs);
  }
  
  .home-feature-title::after {
    bottom: -4px;
  }
  
  .home-feature-description {
    font-size: 0.85rem;
    line-height: 1.5;
    margin-top: var(--spacing-xs);
  }
}

/* IE9-IE11 兼容性修复 */
@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
  .home-features-grid {
    display: -ms-flexbox;
  }
  
  .home-feature-item {
    width: calc(25% - var(--spacing-lg) * 0.75);
  }
}


/* ===================================
   发展理念
   =================================== */
/* ===================================
   联系我们
   =================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.contact-item:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateX(5px);
}

.contact-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 32px;
  text-align: center;
}

.contact-label {
  font-size: var(--font-xs);
  color: var(--text-light);
  margin-bottom: 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  min-width: 80px;
}

.contact-value {
  font-size: var(--font-sm);
  line-height: 1.4;
  color: var(--text-white);
  margin-bottom: 0;
}

.contact-cta {
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-cta-content {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  border-radius: var(--radius-lg);
  width: 100%;
  box-shadow: var(--shadow-lg);
}

.cta-title {
  font-size: var(--font-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-white);
}

.cta-text {
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-sm);
}

/* ===================================
   页脚
   =================================== */
.footer {
  background-color: var(--bg-darker);
  color: var(--text-white);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand {
  margin-bottom: var(--spacing-lg);
}

.footer-logo {
  font-size: var(--font-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-white);
}

.footer-slogan {
  color: var(--text-light);
  font-size: var(--font-sm);
}

.footer-heading {
  font-size: var(--font-md);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-white);
}

.footer-nav {
  list-style: none;
}

.footer-nav li {
  margin-bottom: var(--spacing-sm);
}

.footer-nav a {
  color: var(--text-light);
  text-decoration: none;
  font-size: var(--font-sm);
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--primary-color);
}

/* 统一 Footer Section 样式 (新版) */
.footer-section {
  min-width: 200px;
}

.footer-section h3 {
  font-size: var(--font-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-white);
}

.footer-section h4 {
  font-size: var(--font-base);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-white);
}

.footer-section p {
  font-size: var(--font-sm);
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: var(--spacing-xs);
}

.footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-sm);
  color: var(--text-light);
}

.footer-section ul li a {
  color: var(--text-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
  color: var(--primary-color);
}

/* 兼容旧版样式 */
.footer-title {
  font-size: var(--font-md);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-white);
}

.footer-text {
  font-size: var(--font-sm);
  color: var(--text-light);
  line-height: 1.6;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-sm);
  color: var(--text-light);
}

.footer-links li a {
  color: var(--text-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links li a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.copyright {
  color: var(--text-light);
  font-size: var(--font-sm);
}

/* ===================================
   响应式设计 - 平板
   =================================== */
@media (max-width: 968px) {
  .hero-title {
    font-size: var(--font-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-lg);
  }
  
  .section-title {
    font-size: var(--font-2xl);
  }
  
  .nav-menu {
    gap: var(--spacing-md);
  }
  
  .products-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .about-building-img {
    height: 300px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  /* 特性网格 - 平板端保持4列，间距适当调整 */
  .features-grid {
    gap: var(--spacing-md);
  }

  /* 下拉菜单 - 平板端 */
  .dropdown-menu {
    padding: var(--spacing-lg);
  }

  .dropdown-grid {
    -ms-grid-columns: 1fr 1fr 1fr;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    max-width: 1000px;
  }

  .dropdown-item {
    padding: var(--spacing-md);
    min-height: 110px;
  }

  .dropdown-item-icon {
    width: 40px;
    height: 40px;
  }

  .dropdown-item-icon svg {
    width: 20px;
    height: 20px;
  }

  .dropdown-item-title {
    font-size: var(--font-sm);
  }

  .dropdown-item-desc {
    font-size: var(--font-xs);
  }
}

/* ===================================
   响应式设计 - 手机
   =================================== */
@media (max-width: 768px) {
  /* 导航栏 */
  .navbar .container {
    flex-direction: column;
    padding: var(--spacing-sm);
  }
  
  .nav-menu {
    margin-top: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
  }
  
  .nav-link {
    font-size: var(--font-xs);
  }

  /* 下拉菜单 - 移动端 */
  .dropdown-menu {
    padding: var(--spacing-md);
  }

  .dropdown-grid {
    -ms-grid-columns: 1fr 1fr;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    max-width: 100%;
  }

  .dropdown-item {
    padding: var(--spacing-sm);
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
    -ms-flex-direction: row;
    flex-direction: row;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: var(--spacing-xs);
    min-height: auto;
    height: auto;
  }

  .dropdown-item-icon {
    width: 32px;
    height: 32px;
    margin-bottom: 0;
    -webkit-box-flex: 0;
    -ms-flex: 0 0 auto;
    flex: 0 0 auto;
  }

  .dropdown-item-icon svg {
    width: 16px;
    height: 16px;
  }

  .dropdown-item-title {
    font-size: var(--font-xs);
  }

  .dropdown-item-desc {
    display: none;
  }
  
  /* Hero */
  .hero {
    padding-top: 100px;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
  
  .hero-title {
    font-size: var(--font-2xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-md);
  }
  
  .hero-description {
    font-size: var(--font-sm);
  }
  
  .hero-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .btn {
    width: 100%;
    text-align: center;
  }
  
  /* Section */
  .section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }
  
  .section-title {
    font-size: var(--font-xl);
  }
  
  .section-subtitle {
    font-size: var(--font-sm);
  }
  
  /* 产品网格 */
  .products-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .product-card {
    padding: var(--spacing-lg);
  }

  /* 关于我们 */
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .about-building-img {
    height: 250px;
  }
  
  /* 特性网格 - 保持2列以便在小屏幕上也能合理显示 */
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .feature-item {
    padding: var(--spacing-lg);
  }
  
  .feature-icon {
    font-size: 2.5rem;
  }

  .feature-title {
    font-size: var(--font-md);
  }
  
  /* 联系 */
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  /* 页脚 */
  .footer {
    padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-lg);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  /* 关于 */
  .about-text p {
    font-size: var(--font-sm);
  }
}

/* ===================================
   响应式设计 - 小屏手机
   =================================== */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .hero-title {
    font-size: var(--font-xl);
  }
  
  .section-title {
    font-size: var(--font-lg);
  }
  
  .stat-number {
    font-size: var(--font-3xl);
  }
  
  .product-icon,
  .feature-icon {
    font-size: 2.5rem;
  }
}

/* ===================================
   打印样式
   =================================== */
@media print {
  .navbar,
  .hero-buttons,
  .contact-cta {
    display: none;
  }
  
  .section {
    page-break-inside: avoid;
  }
}

/* ===================================
   动画效果
   =================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.product-card,
.feature-item,
.stat-item {
  animation: fadeInUp 0.6s ease-out;
}

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

/* ===================================
   返回顶部按钮
   =================================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  -webkit-transition: all var(--transition-base);
  z-index: 9999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  animation: backToTopEnter 0.4s ease-out;
  -webkit-animation: backToTopEnter 0.4s ease-out;
}

@keyframes backToTopEnter {
  0% {
    transform: translateY(20px);
    -webkit-transform: translateY(20px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    -webkit-transform: translateY(0);
    opacity: 1;
  }
}

@-webkit-keyframes backToTopEnter {
  0% {
    -webkit-transform: translateY(20px);
    opacity: 0;
  }
  100% {
    -webkit-transform: translateY(0);
    opacity: 1;
  }
}

.back-to-top:hover {
  transform: translateY(-3px);
  -webkit-transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
  background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
}

.back-to-top:active {
  transform: translateY(-1px);
  -webkit-transform: translateY(-1px);
  box-shadow: 0 2px 10px rgba(102, 126, 234, 0.4);
}

.back-to-top-icon {
  width: 24px;
  height: 24px;
  stroke: #ffffff;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  position: relative;
  z-index: 1;
  transition: all var(--transition-base);
  -webkit-transition: all var(--transition-base);
}

.back-to-top:hover .back-to-top-icon {
  transform: translateY(-2px);
  -webkit-transform: translateY(-2px);
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }

  .back-to-top-icon {
    width: 20px;
    height: 20px;
  }
}

/* ===================================
   联系我们页面 - 现代化设计
   =================================== */

/* 页面背景 - 轻柔渐变 */
.contact-page-section {
  min-height: 100vh;
  background: linear-gradient(135deg, #e8f4f8 0%, #d4e9f7 50%, #e8f0fe 100%);
  background-size: 400% 400%;
  -webkit-background-size: 400% 400%;
  animation: gradientBG 20s ease infinite;
  -webkit-animation: gradientBG 20s ease infinite;
  padding-top: calc(60px + var(--spacing-2xl));
  padding-bottom: var(--spacing-3xl);
}

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

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

/* 页面标题优化 */
.contact-page-section .page-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  color: var(--text-primary);
}

.contact-page-section .page-title {
  font-size: var(--font-4xl);
  font-weight: 800;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--spacing-sm);
}

.contact-page-section .page-subtitle {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  letter-spacing: 4px;
  text-transform: uppercase;
  font-weight: 600;
}

.page-divider {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, transparent, #667eea, transparent);
  -webkit-linear-gradient(90deg, transparent, #667eea, transparent);
  margin: var(--spacing-md) auto 0;
  border-radius: 2px;
}

/* 玻璃拟态卡片 - 带兼容性处理 */
.glass-card {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(102, 126, 234, 0.15);
  border-radius: var(--radius-xl);
  box-shadow:
    0 8px 32px rgba(102, 126, 234, 0.1),
    0 2px 8px rgba(102, 126, 234, 0.05);
  transition: all var(--transition-base);
  -webkit-transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

/* 现代浏览器支持玻璃拟态 */
@supports (backdrop-filter: blur(20px)) or (-webkit-backdrop-filter: blur(20px)) {
  .glass-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow:
      0 8px 32px rgba(102, 126, 234, 0.08),
      0 2px 8px rgba(102, 126, 234, 0.04);
  }
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(102, 126, 234, 0.05),
    transparent
  );
  transition: left var(--transition-slow);
  -webkit-transition: left var(--transition-slow);
  pointer-events: none;
}

.glass-card:hover::before {
  left: 100%;
}

.glass-card:hover {
  transform: translateY(-8px);
  -webkit-transform: translateY(-8px);
  box-shadow:
    0 16px 48px rgba(102, 126, 234, 0.15),
    0 4px 16px rgba(102, 126, 234, 0.08);
  border-color: rgba(102, 126, 234, 0.3);
}

/* 卡片装饰元素 */
.card-decoration {
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    circle at center,
    rgba(255, 255, 255, 0.1) 0%,
    transparent 70%
  );
  -webkit-radial-gradient(
    circle at center,
    rgba(255, 255, 255, 0.1) 0%,
    transparent 70%
  );
  pointer-events: none;
}

/* 联系卡片网格 */
.contact-cards-grid {
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr 1fr 1fr;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.contact-card {
  padding: var(--spacing-xl);
  text-align: center;
  color: var(--text-primary);
  position: relative;
  z-index: 1;
}

.contact-card-wide {
  grid-column: span 2;
}

/* 卡片图标 */
.card-icon-wrapper {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  border-radius: 50%;
  border: 2px solid rgba(102, 126, 234, 0.2);
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.1);
  transition: all var(--transition-base);
  -webkit-transition: all var(--transition-base);
}

.glass-card:hover .card-icon-wrapper {
  transform: scale(1.1) rotate(5deg);
  -webkit-transform: scale(1.1) rotate(5deg);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.2);
}

.card-icon {
  display: block;
  width: 40px;
  height: 40px;
  stroke: #667eea;
  stroke-width: 2;
}

/* 卡片内容 */
.card-title {
  font-size: var(--font-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.card-value {
  font-size: var(--font-lg);
  font-weight: 500;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.card-link {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: var(--radius-lg);
  color: var(--text-white);
  text-decoration: none;
  font-size: var(--font-sm);
  font-weight: 500;
  transition: all var(--transition-base);
  -webkit-transition: all var(--transition-base);
  border: none;
}

.card-link:hover {
  background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
  transform: translateY(-2px);
  -webkit-transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* 联系人卡片 */
.card-contacts {
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr 1fr;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.contact-person {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  background: rgba(102, 126, 234, 0.05);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(102, 126, 234, 0.1);
  transition: all var(--transition-base);
  -webkit-transition: all var(--transition-base);
}

.contact-person:hover {
  background: rgba(102, 126, 234, 0.1);
  transform: translateY(-4px);
  -webkit-transform: translateY(-4px);
}

.person-name {
  font-size: var(--font-md);
  font-weight: 600;
  color: var(--text-primary);
}

.person-phone {
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

.person-link {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  border-radius: var(--radius-sm);
  color: var(--text-white);
  text-decoration: none;
  font-size: var(--font-xs);
  font-weight: 600;
  transition: all var(--transition-base);
  -webkit-transition: all var(--transition-base);
  -ms-flex-item-align: start;
  align-self: flex-start;
}

.person-link:hover {
  transform: scale(1.05);
  -webkit-transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* 地图与信息区域 */
.contact-info-section {
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr 1fr;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

/* 地图容器 */
.contact-map-wrapper {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-map-container {
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(102, 126, 234, 0.1);
  border: 1px solid rgba(102, 126, 234, 0.15);
  height: 350px;
}

/* 现代浏览器支持模糊效果 */
@supports (backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px)) {
  .contact-map-container {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.7);
  }
}

.contact-map-placeholder {
  width: 100%;
  height: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.03) 0%, rgba(118, 75, 162, 0.03) 100%);
  transition: all var(--transition-base);
  -webkit-transition: all var(--transition-base);
  padding: var(--spacing-xl);
}

.contact-map-link:hover .contact-map-placeholder {
  transform: scale(1.02);
  -webkit-transform: scale(1.02);
}

.map-placeholder-icon {
  width: 80px;
  height: 80px;
  margin-bottom: var(--spacing-md);
  stroke: #667eea;
  stroke-width: 1.5;
  animation: pulse 2s infinite;
  -webkit-animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    -webkit-transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.1);
    -webkit-transform: scale(1.1);
    opacity: 0.8;
  }
}

@-webkit-keyframes pulse {
  0%, 100% {
    -webkit-transform: scale(1);
    opacity: 1;
  }
  50% {
    -webkit-transform: scale(1.1);
    opacity: 0.8;
  }
}

.map-placeholder-text {
  text-align: center;
}

.map-placeholder-address {
  font-size: var(--font-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.map-placeholder-note {
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

/* 交通信息 */
.transport-info {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  gap: var(--spacing-md);
}

.transport-item {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(102, 126, 234, 0.1);
  transition: all var(--transition-base);
  -webkit-transition: all var(--transition-base);
}

.transport-item:hover {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(102, 126, 234, 0.2);
  transform: translateX(8px);
  -webkit-transform: translateX(8px);
}

.transport-icon {
  font-size: 2rem;
  -ms-flex-negative: 0;
  flex-shrink: 0;
}

.transport-text h4 {
  font-size: var(--font-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.transport-text p {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* CTA区域 */
.contact-cta-wrapper {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

.cta-card {
  padding: var(--spacing-2xl);
  text-align: center;
  color: var(--text-white);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px rgba(102, 126, 234, 0.2);
}

.cta-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  animation: bounce 2s infinite;
  -webkit-animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
    -webkit-transform: translateY(0);
  }
  40% {
    transform: translateY(-20px);
    -webkit-transform: translateY(-20px);
  }
  60% {
    transform: translateY(-10px);
    -webkit-transform: translateY(-10px);
  }
}

@-webkit-keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    -webkit-transform: translateY(0);
  }
  40% {
    -webkit-transform: translateY(-20px);
  }
  60% {
    -webkit-transform: translateY(-10px);
  }
}

.cta-title {
  font-size: var(--font-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-white);
}

.cta-description {
  font-size: var(--font-md);
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.cta-buttons {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  gap: var(--spacing-md);
}

.btn-icon {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-icon svg {
  width: 20px;
  height: 20px;
}

/* 现代按钮样式 */
.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  -webkit-transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: var(--text-white);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
  -webkit-transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 1200px) {
  .contact-cards-grid {
    -ms-grid-columns: 1fr 1fr;
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-card-wide {
    -ms-grid-column-span: 2;
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .contact-page-section {
    padding-top: calc(60px + var(--spacing-xl));
    padding-bottom: var(--spacing-2xl);
  }

  .contact-page-section .page-title {
    font-size: var(--font-3xl);
  }

  .contact-cards-grid {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .contact-card-wide {
    -ms-grid-column-span: 1;
    grid-column: span 1;
  }

  .card-contacts {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
  }

  .contact-info-section {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
  }

  .contact-cta-wrapper {
    -webkit-box-ordinal-group: 0;
    -ms-flex-order: -1;
    order: -1;
  }

  .cta-buttons {
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
    -ms-flex-direction: row;
    flex-direction: row;
  }

  .contact-map-container {
    height: 300px;
  }
}

/* ===================================
   IE兼容性回退样式
   =================================== */

/* IE10+ 和不支持现代特性的浏览器 */
@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
  .contact-page-section {
    background: #e8f4f8;
    animation: none;
  }

  .glass-card {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid #d4e9f7;
  }

  .contact-cards-grid,
  .card-contacts,
  .contact-info-section {
    display: block;
  }

  .contact-card {
    display: block;
    margin-bottom: var(--spacing-lg);
  }

  .contact-card-wide {
    width: 100%;
  }

  .card-contacts .contact-person {
    display: inline-block;
    vertical-align: top;
    width: 48%;
    margin-right: 2%;
  }

  .contact-map-wrapper,
  .contact-cta-wrapper {
    display: block;
    margin-bottom: var(--spacing-xl);
  }

  .cta-buttons .btn {
    display: block;
    margin-bottom: var(--spacing-sm);
  }
}

/* ===================================
   联系我们页面 - 双栏布局（废弃）
   =================================== */
.contact-page-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.contact-page-left {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-page-right {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* 联系方式卡片优化 */
.contact-info-card {
  background-color: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
}

.contact-info-title {
  font-size: var(--font-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--bg-light);
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.contact-info-list .contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  margin-bottom: 0;
  background-color: transparent;
  border-radius: 0;
}

.contact-info-list .contact-item:hover {
  background-color: transparent;
  transform: none;
}

.contact-info-list .contact-label {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 90px;
  flex-shrink: 0;
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 0;
}

.contact-info-list .contact-value {
  font-size: var(--font-md);
  color: var(--text-primary);
  line-height: 1.6;
}

/* 交通信息卡片 */
.contact-map-info {
  background-color: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.map-info-title {
  font-size: var(--font-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.map-info-text {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.map-info-text:last-child {
  margin-bottom: 0;
}

.map-info-label {
  font-weight: 600;
  color: var(--primary-color);
  margin-right: var(--spacing-xs);
}

/* 地图区域优化 */
.contact-page-right .contact-map-section {
  margin-top: 0;
  margin-bottom: 0;
}

.contact-page-right .contact-map-title {
  font-size: var(--font-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  text-align: left;
}

.contact-page-right .contact-map-container {
  height: 350px;
}

/* CTA区域优化 */
.contact-page-right .contact-cta {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.contact-page-right .contact-cta .cta-title {
  font-size: var(--font-xl);
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: var(--spacing-sm);
}

.contact-page-right .contact-cta .cta-description {
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-sm);
}

.contact-page-right .contact-cta .btn-large {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-lg);
}

/* 联系我们页面响应式设计 */
@media (max-width: 960px) {
  .contact-page-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .contact-page-left {
    order: 1;
  }

  .contact-page-right {
    order: 2;
  }
}

/* ===================================
   联系我们页面 - 地图区域
   =================================== */
.contact-map-section {
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.contact-map-title {
  font-size: var(--font-2xl);
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.contact-map-container {
  width: 100%;
  height: 400px;
  background-color: var(--bg-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.contact-map-iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* 地图链接（跳转至百度地图检索页） */
.contact-map-link {
  display: block;
  width: 100%;
  height: 100%;
  text-decoration: none;
  color: inherit;
  outline: none;
}

.contact-map-link:hover .contact-map-placeholder {
  transform: scale(1.02);
}

.contact-map-link:focus .contact-map-placeholder {
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.3);
}

/* 地图占位符样式 */
.contact-map-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
  z-index: 1;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer;
}

.map-placeholder-icon {
  font-size: 64px;
  margin-bottom: var(--spacing-md);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-20px);
  }
  60% {
    transform: translateY(-10px);
  }
}

.map-placeholder-text {
  text-align: center;
  padding: 0 var(--spacing-lg);
}

.map-placeholder-address {
  font-size: var(--font-lg);
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.map-placeholder-note {
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

/* 地图信息 */
.contact-map-info {
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.map-info-text {
  font-size: var(--font-md);
  color: var(--text-primary);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.map-info-text:last-child {
  margin-bottom: 0;
}

.map-info-label {
  font-weight: 600;
  color: var(--primary-color);
  margin-right: var(--spacing-xs);
}

/* 地图区域响应式设计 */
@media (max-width: 768px) {
  .contact-map-container {
    height: 300px;
  }

  .contact-map-title {
    font-size: var(--font-xl);
  }

  .map-placeholder-icon {
    font-size: 48px;
  }

  .map-placeholder-address {
    font-size: var(--font-md);
  }

  .map-placeholder-note {
    font-size: var(--font-xs);
  }

  .contact-map-info {
    padding: var(--spacing-md);
  }

  .map-info-text {
    font-size: var(--font-sm);
  }
}
.map-info-text {
  font-size: var(--font-sm);
}
}

/* ===================================
   产品详情页专用样式
   =================================== */

/* 产品详情页容器 */
.product-detail-page {
  min-height: calc(100vh - 60px);
  background-color: #f8fafc;
}

/* 产品Hero区域 */
.product-hero {
  background: linear-gradient(135deg, #1e40af 0%, #3b82f6 50%, #2563eb 100%);
  color: white;
  padding: var(--spacing-4xl) 0 var(--spacing-3xl);
  position: relative;
  overflow: hidden;
}

.product-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 40%);
  pointer-events: none;
}

.product-hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.product-hero-title {
  font-size: var(--font-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
  line-height: 1.2;
  letter-spacing: -1px;
}

.product-hero-subtitle {
  font-size: var(--font-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  opacity: 0.95;
}

.product-hero-divider {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, transparent, white, transparent);
  margin: var(--spacing-xl) auto;
}

.product-hero-description {
  font-size: var(--font-md);
  line-height: 1.8;
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.product-hero-actions {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.product-hero-actions .btn {
  min-width: 160px;
}

/* 产品章节 */
.product-section {
  padding: var(--spacing-3xl) 0;
}

.product-section-alt {
  background-color: white;
}

.product-section .section-header,
.product-section-alt .section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.product-section .section-title,
.product-section-alt .section-title {
  font-size: var(--font-2xl);
  font-weight: 700;
  color: #1e293b;
  margin-bottom: var(--spacing-sm);
}

.product-section .section-subtitle,
.product-section-alt .section-subtitle {
  font-size: var(--font-base);
  color: #64748b;
  margin-top: var(--spacing-xs);
}

/* 产品简介内容 */
.product-intro-content {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.product-intro-content p {
  font-size: var(--font-base);
  line-height: 1.8;
  color: #475569;
  margin-bottom: var(--spacing-md);
  text-align: justify;
  position: relative;
  padding-left: var(--spacing-md);
}

.product-intro-content p::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, #3b82f6, #1e40af);
  border-radius: 2px;
}

.product-intro-content p:first-child::before {
  height: 80%;
  top: 10%;
}

.product-intro-content p:nth-child(2)::before {
  height: 60%;
  top: 20%;
}

.product-intro-content p:nth-child(3)::before {
  height: 70%;
  top: 15%;
}

.product-intro-content p:nth-child(4)::before {
  height: 75%;
  top: 12.5%;
}

.product-intro-content p:last-child::before {
  height: 85%;
  top: 7.5%;
}

/* 设计原则网格 */
.design-principles-grid {
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr 1fr;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.principle-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl) var(--spacing-xl);
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: all var(--transition-base);
  border: 1px solid #e2e8f0;
  position: relative;
  overflow: hidden;
}

.principle-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #1e40af);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.principle-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
  border-color: #3b82f6;
}

.principle-card:hover::before {
  transform: scaleX(1);
}

.principle-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-md);
  transition: transform var(--transition-base);
  position: relative;
  z-index: 1;
}

.principle-card:hover .principle-icon {
  transform: scale(1.15);
}

.principle-title {
  font-size: var(--font-lg);
  font-weight: 700;
  color: #1e293b;
  margin-bottom: var(--spacing-sm);
  position: relative;
  z-index: 1;
}

.principle-desc {
  font-size: var(--font-sm);
  color: #64748b;
  line-height: 1.5;
  position: relative;
  z-index: 1;
}

/* 功能特色列表 */
.features-list {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-lg);
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  transition: all var(--transition-base);
  border: 1px solid #e2e8f0;
  position: relative;
  overflow: hidden;
}

.feature-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, #3b82f6, #1e40af);
  transform: scaleY(0);
  transition: transform var(--transition-base);
}

.feature-item:hover {
  transform: translateX(4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  border-color: #3b82f6;
}

.feature-item:hover::before {
  transform: scaleY(1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
  transition: transform var(--transition-base);
}

.feature-item:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: white;
}

.feature-content {
  flex: 1;
}

.feature-title {
  font-size: var(--font-lg);
  font-weight: 700;
  color: #1e293b;
  margin-bottom: var(--spacing-xs);
}

.feature-desc {
  font-size: var(--font-sm);
  color: #64748b;
  line-height: 1.6;
}

/* 架构图占位符 */
.architecture-diagram {
  max-width: 1000px;
  margin: 0 auto;
}

.architecture-placeholder {
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-4xl);
  text-align: center;
  border: 2px dashed #cbd5e1;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.architecture-placeholder:hover {
  border-color: #3b82f6;
  box-shadow: 0 8px 32px rgba(59, 130, 246, 0.1);
  transform: translateY(-4px);
}

.architecture-placeholder::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.03) 0%, transparent 70%);
  animation: placeholder-pulse 4s ease-in-out infinite;
}

@keyframes placeholder-pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

.placeholder-icon {
  font-size: 80px;
  margin-bottom: var(--spacing-xl);
  opacity: 0.6;
  position: relative;
  z-index: 1;
}

.placeholder-text {
  font-size: var(--font-xl);
  font-weight: 700;
  color: #475569;
  margin-bottom: var(--spacing-sm);
  position: relative;
  z-index: 1;
}

.placeholder-subtext {
  font-size: var(--font-md);
  color: #94a3b8;
  position: relative;
  z-index: 1;
}

/* 客户案例网格 */
.clients-grid {
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr 1fr 1fr 1fr 1fr;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.client-item {
  background: white;
  border-radius: var(--radius-md);
  padding: var(--spacing-xl) var(--spacing-md);
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  border: 1px solid #e2e8f0;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.client-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #1e40af);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.client-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  border-color: #3b82f6;
}

.client-item:hover::before {
  transform: scaleX(1);
}

.client-name {
  font-size: var(--font-md);
  font-weight: 700;
  color: #1e293b;
  margin-bottom: var(--spacing-xs);
  position: relative;
  z-index: 1;
  line-height: 1.4;
}

.client-en {
  font-size: var(--font-xs);
  color: #64748b;
  line-height: 1.3;
  position: relative;
  z-index: 1;
}

/* 架构图样式 */
.architecture-diagram {
  max-width: 1000px;
  margin: 0 auto;
}

.architecture-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all var(--transition-base);
}

.architecture-image:hover {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

/* 产品CTA */
.product-cta {
  background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-3xl);
  text-align: center;
  color: white;
  box-shadow: 0 8px 32px rgba(30, 64, 175, 0.3);
  position: relative;
  overflow: hidden;
}

.product-cta::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  animation: cta-pulse 6s ease-in-out infinite;
}

@keyframes cta-pulse {
  0%, 100% {
    transform: scale(1) translate(0, 0);
  }
  50% {
    transform: scale(1.05) translate(-2%, -2%);
  }
}

.cta-title {
  font-size: var(--font-2xl);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.cta-description {
  font-size: var(--font-base);
  opacity: 0.95;
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.cta-buttons .btn {
  min-width: 140px;
  transition: transform var(--transition-base);
}

.cta-buttons .btn:hover {
  transform: translateY(-4px);
}

/* 右侧悬浮交互栏 */
.floating-sidebar {
  position: fixed;
  right: 30px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.floating-item {
  width: 56px;
  height: 56px;
  background: white;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
  position: relative;
}

.floating-item:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(59, 130, 246, 0.3);
  background: #3b82f6;
}

.floating-item svg {
  width: 28px;
  height: 28px;
  color: #3b82f6;
  transition: color var(--transition-fast);
}

.floating-item:hover svg {
  color: white;
}

.floating-tooltip {
  position: absolute;
  right: 70px;
  background: #1e293b;
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.floating-item:hover .floating-tooltip {
  opacity: 1;
  visibility: visible;
}

/* 产品详情页响应式设计 */
@media (max-width: 968px) {
  .product-hero-title {
    font-size: var(--font-4xl);
  }

  .product-hero-subtitle {
    font-size: var(--font-lg);
  }

  .product-hero-description {
    font-size: var(--font-md);
  }

  .design-principles-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
  }

  .principle-card {
    padding: var(--spacing-2xl) var(--spacing-lg);
  }

  .feature-item {
    flex-direction: column;
    text-align: center;
  }

  .feature-item:hover {
    transform: translateY(-4px);
  }

  .floating-sidebar {
    right: 15px;
  }
}

@media (max-width: 768px) {
  .product-hero {
    padding: var(--spacing-4xl) 0 var(--spacing-3xl);
  }

  .product-hero-title {
    font-size: var(--font-3xl);
  }

  .product-hero-subtitle {
    font-size: var(--font-base);
  }

  .product-hero-description {
    font-size: var(--font-base);
  }

  .product-section,
  .product-section-alt {
    padding: var(--spacing-3xl) 0;
  }

  .product-section .section-title,
  .product-section-alt .section-title {
    font-size: var(--font-2xl);
  }

  .product-section .section-subtitle,
  .product-section-alt .section-subtitle {
    font-size: var(--font-md);
  }

  .design-principles-grid {
    grid-template-columns: 1fr;
  }

  .feature-icon {
    width: 64px;
    height: 64px;
  }

  .feature-icon svg {
    width: 32px;
    height: 32px;
  }

  .feature-title {
    font-size: var(--font-lg);
  }

  .feature-desc {
    font-size: var(--font-base);
  }

  .clients-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .product-cta {
    padding: var(--spacing-3xl);
  }

  .cta-title {
    font-size: var(--font-2xl);
  }

  .cta-description {
    font-size: var(--font-md);
  }

  .floating-sidebar {
    right: 10px;
    bottom: 80px;
    top: auto;
    transform: none;
  }

  .floating-item {
    width: 48px;
    height: 48px;
  }

  .floating-item svg {
    width: 24px;
    height: 24px;
  }

  .floating-tooltip {
    display: none;
  }
}