/* 
 * 远程云官网 - 主样式文件
 * 域名: yuancheng365.com
 * 设计风格: 深色科技风
 */

/* ==================== 基础重置 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 主色调 */
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #60a5fa;
  
  /* 渐变色 */
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --gradient-dark: linear-gradient(135deg, #1e3a8a 0%, #312e81 100%);
  --gradient-card: linear-gradient(180deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
  
  /* 背景色 */
  --bg-dark: #0f172a;
  --bg-darker: #020617;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  
  /* 文字颜色 */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* 边框 */
  --border-color: #334155;
  --border-light: #475569;
  
  /* 状态色 */
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  /* 间距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* 圆角 */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.3);
  
  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* 容器宽度 */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--text-primary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

/* ==================== 布局容器 ==================== */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-lg {
  max-width: var(--container-2xl);
}

/* ==================== 导航栏 ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(2, 6, 23, 0.98);
  box-shadow: var(--shadow-lg);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  padding: 0 var(--spacing-lg);
  max-width: var(--container-2xl);
  margin: 0 auto;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.navbar-logo img {
  height: 40px;
  width: auto;
}

.navbar-logo span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.navbar-item {
  position: relative;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.navbar-item:hover {
  color: var(--text-primary);
}

.navbar-item.active {
  color: var(--primary-light);
}

/* 下拉菜单 */
.navbar-dropdown {
  position: relative;
}

.navbar-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-xl);
}

.navbar-dropdown:hover .navbar-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.navbar-dropdown-item {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.navbar-dropdown-item:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  padding-left: var(--spacing-xl);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* 移动端菜单按钮 */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-sm);
  cursor: pointer;
}

.navbar-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

/* ==================== 按钮 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-primary);
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
  color: var(--text-primary);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--primary);
  color: var(--text-primary);
}

.btn-outline {
  background: transparent;
  color: var(--primary-light);
  border: 1px solid var(--primary);
}

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

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
}

/* ==================== Hero区域 ==================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 70px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-dark);
  z-index: -2;
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-lg);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--primary-light);
  margin-bottom: var(--spacing-lg);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-3xl);
  border-top: 1px solid var(--border-color);
}

.hero-stat {
  text-align: center;
}

.hero-stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.hero-stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

.section-dark {
  background: var(--bg-darker);
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--primary-light);
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* ==================== 产品卡片 ==================== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.product-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

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

.product-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
}

.product-icon svg {
  width: 30px;
  height: 30px;
  color: white;
}

.product-name {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.product-desc {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: 0.9375rem;
}

.product-features {
  margin-bottom: var(--spacing-lg);
}

.product-feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.product-feature svg {
  width: 16px;
  height: 16px;
  color: var(--success);
  flex-shrink: 0;
}

.product-price {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-lg);
}

.product-price-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-light);
}

.product-price-unit {
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

.advantage-item {
  text-align: center;
  padding: var(--spacing-xl);
}

.advantage-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
}

.advantage-item:hover .advantage-icon {
  background: var(--gradient-primary);
  border-color: transparent;
  transform: scale(1.1);
}

.advantage-icon svg {
  width: 40px;
  height: 40px;
  color: var(--primary-light);
  transition: color var(--transition-normal);
}

.advantage-item:hover .advantage-icon svg {
  color: white;
}

.advantage-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.advantage-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* ==================== 价格表格 ==================== */
.pricing-table {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.pricing-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
}

.pricing-tab {
  flex: 1;
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pricing-tab:hover,
.pricing-tab.active {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.pricing-tab.active {
  border-bottom: 2px solid var(--primary);
  color: var(--primary-light);
}

.pricing-content {
  overflow-x: auto;
}

.pricing-content table {
  width: 100%;
  border-collapse: collapse;
}

.pricing-content th,
.pricing-content td {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.pricing-content th {
  background: var(--bg-card-hover);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-transform: uppercase;
}

.pricing-content td {
  font-size: 0.9375rem;
}

.pricing-content tr:hover td {
  background: rgba(59, 130, 246, 0.05);
}

/* ==================== 数据中心 ==================== */
.datacenter-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.datacenter-item {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.datacenter-item:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}

.datacenter-status {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 10px;
  height: 10px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.datacenter-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.datacenter-location {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
}

.datacenter-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
  font-size: 0.75rem;
}

.datacenter-stat {
  display: flex;
  justify-content: space-between;
}

.datacenter-stat-label {
  color: var(--text-muted);
}

.datacenter-stat-value {
  color: var(--text-primary);
  font-weight: 500;
}

/* ==================== 客户评价 ==================== */
.testimonials-slider {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.testimonial-rating {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.testimonial-rating svg {
  width: 20px;
  height: 20px;
  color: #fbbf24;
  fill: #fbbf24;
}

.testimonial-content {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: white;
}

.testimonial-info {
  flex: 1;
}

.testimonial-name {
  font-weight: 600;
  margin-bottom: 2px;
}

.testimonial-company {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ==================== 新闻资讯 ==================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.news-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.news-image {
  aspect-ratio: 16/9;
  background: var(--gradient-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.news-content {
  padding: var(--spacing-lg);
}

.news-tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(59, 130, 246, 0.1);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--primary-light);
  margin-bottom: var(--spacing-sm);
}

.news-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-excerpt {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

/* ==================== 页脚 ==================== */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(7, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.footer-logo span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-lg);
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.footer-column h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-legal a {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-legal a:hover {
  color: var(--text-secondary);
}

/* ==================== 页面标题区 ==================== */
.page-header {
  padding: 140px 0 60px;
  background: var(--gradient-dark);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 70% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
}

.page-header-content {
  position: relative;
  text-align: center;
}

.page-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.page-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  font-size: 0.875rem;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--text-secondary);
}

.breadcrumb span {
  color: var(--text-muted);
}

.breadcrumb-current {
  color: var(--text-secondary);
}

/* ==================== 内容卡片 ==================== */
.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.content-card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.content-card-title {
  font-size: 1.5rem;
  font-weight: 600;
}

.content-card-body {
  color: var(--text-secondary);
  line-height: 1.8;
}

.content-card-body p {
  margin-bottom: var(--spacing-md);
}

.content-card-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: var(--spacing-xl) 0 var(--spacing-md);
  color: var(--text-primary);
}

.content-card-body ul {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

.content-card-body li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.content-card-body li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

/* ==================== FAQ ==================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  cursor: pointer;
  font-weight: 500;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--bg-card-hover);
}

.faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==================== 表单样式 ==================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

/* ==================== 分页 ==================== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-2xl);
}

.pagination-item {
  min-width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
}

.pagination-item:hover {
  border-color: var(--primary);
  color: var(--text-primary);
}

.pagination-item.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ==================== 标签 ==================== */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(59, 130, 246, 0.1);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--primary-light);
}

.tag-success {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success);
}

.tag-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}

.tag-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

/* ==================== 空状态 ==================== */
.empty-state {
  text-align: center;
  padding: var(--spacing-3xl);
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  color: var(--text-muted);
}

.empty-state-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.empty-state-desc {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* ==================== 加载状态 ==================== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl);
}

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

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

/* ==================== 动画效果 ==================== */
.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

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

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

/* ==================== 响应式设计 ==================== */
@media (max-width: 1280px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .datacenter-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
  }
  
  .footer-brand {
    grid-column: span 4;
    max-width: 100%;
  }
}

@media (max-width: 1024px) {
  .navbar-menu {
    display: none;
  }
  
  .navbar-toggle {
    display: flex;
  }
  
  .testimonials-slider {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 120px 0 60px;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-stat-value {
    font-size: 1.75rem;
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .product-grid {
    grid-template-columns: 1fr;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  
  .datacenter-grid {
    grid-template-columns: 1fr;
  }
  
  .testimonials-slider {
    grid-template-columns: 1fr;
  }
  
  .news-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }
  
  .footer-brand {
    grid-column: span 2;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .page-title {
    font-size: 2rem;
  }
  
  .page-header {
    padding: 120px 0 40px;
  }
  
  .content-card {
    padding: var(--spacing-lg);
  }
  
  .pricing-content {
    font-size: 0.875rem;
  }
  
  .pricing-content th,
  .pricing-content td {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-brand {
    grid-column: span 1;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .btn-lg {
    padding: var(--spacing-md);
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
}

/* ==================== 移动端菜单 ==================== */
.mobile-menu {
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-dark);
  z-index: 999;
  padding: var(--spacing-lg);
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
  overflow-y: auto;
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu-item {
  display: block;
  padding: var(--spacing-md);
  color: var(--text-secondary);
  font-size: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.mobile-menu-item:hover {
  color: var(--text-primary);
}

/* ==================== 辅助类 ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-blue { color: var(--primary-light); }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mt-5 { margin-top: var(--spacing-2xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-2xl); }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }
.gap-4 { gap: var(--spacing-xl); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.overflow-hidden { overflow: hidden; }
.relative { position: relative; }
.absolute { position: absolute; }

/* ==================== 完整Footer布局 ==================== */
.footer-grid-7 {
  display: grid;
  grid-template-columns: 2fr repeat(7, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

@media (max-width: 1280px) {
  .footer-grid-7 {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
  }
  
  .footer-grid-7 .footer-brand {
    grid-column: span 4;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .footer-grid-7 {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }
  
  .footer-grid-7 .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 480px) {
  .footer-grid-7 {
    grid-template-columns: 1fr;
  }
  
  .footer-grid-7 .footer-brand {
    grid-column: span 1;
  }
}

/* ==================== 统计卡片 ==================== */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ==================== 产品徽章 ==================== */
.product-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.25rem 0.75rem;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: white;
  font-weight: 500;
}

/* ==================== 主色调变量补充 ==================== */
:root {
  --primary-color: #3b82f6;
  --text-tertiary: #64748b;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --radius-full: 9999px;
}