/* 基础样式和CSS变量 */
:root {
  /* 亮色主题 */
  --primary-color: #667eea;
  --secondary-color: #764ba2;
  --accent-color: #f093fb;
  --background-color: #ffffff;
  --surface-color: #f8fafc;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-heavy: 0 10px 25px rgba(0, 0, 0, 0.15);
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-soft: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
  --border-radius: 12px;
  --border-radius-small: 8px;
  --border-radius-large: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --animation-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* 暗色主题 */
[data-theme="dark"] {
  --background-color: #0f172a;
  --surface-color: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border-color: #334155;
  --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-heavy: 0 10px 25px rgba(0, 0, 0, 0.4);
}

/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 性能优化 */
html {
  scroll-behavior: smooth;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* GPU加速 */
.service-card,
.tech-card,
.pricing-card,
.product-item,
.method-card,
.guarantee-item {
  will-change: transform;
  transform: translateZ(0);
}

/* 减少重绘 */
img {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

/* 预加载动画 */
.loading-skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
  transition: var(--transition);
  overflow-x: hidden;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

[data-theme="dark"] .navbar {
  background: rgba(15, 23, 42, 0.98);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #334155;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo h2 {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: var(--transition);
}

.logo-link:hover {
  transform: scale(1.05);
}

.logo-image {
  height: 45px;
  width: auto;
  transition: var(--transition);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 0.5rem 0;
}

[data-theme="dark"] .nav-menu a {
  color: var(--text-secondary);
}

[data-theme="dark"] .nav-menu a:hover,
[data-theme="dark"] .nav-menu a.active {
  color: #667eea;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary-color);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.2rem;
}

[data-theme="dark"] .theme-toggle {
  border-color: #475569;
  color: var(--text-primary);
}

[data-theme="dark"] .theme-toggle:hover {
  border-color: #667eea;
}

.theme-toggle:hover {
  border-color: var(--primary-color);
  transform: scale(1.1);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: var(--transition);
  border-radius: 2px;
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.95rem;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-heavy);
}

.btn-secondary {
  background: var(--gradient-secondary);
  color: white;
  box-shadow: var(--shadow-medium);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-heavy);
}

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* 主要内容区域 */
main {
  margin-top: 70px;
}

/* 英雄区域 */
.hero {
  padding: 4rem 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>') repeat;
  opacity: 0.3;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  color: white;
  margin-bottom: 1rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 1s var(--animation-bounce);
}

.hero-text h2 {
  font-size: 1.8rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s var(--animation-bounce) 0.2s both;
}

.hero-text p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2rem;
  line-height: 1.7;
  animation: fadeInUp 1s var(--animation-bounce) 0.4s both;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  animation: fadeInUp 1s var(--animation-bounce) 0.6s both;
}

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

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

.hero-svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.2));
}

/* 服务区域 */
.services {
  padding: 5rem 0;
  background: var(--surface-color);
}

.services h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--background-color);
  padding: 2rem;
  border-radius: var(--border-radius-large);
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

/* 服务页面样式 */
.services-hero {
  background: var(--gradient-primary);
  color: white;
  text-align: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.services-hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.services-hero p {
  font-size: 1.2rem;
  opacity: 0.9;
}

.detailed-services {
  padding: 80px 0;
  background: var(--background-color);
}

.service-detail {
  margin-bottom: 80px;
  padding: 40px 0;
}

.service-detail:last-child {
  margin-bottom: 0;
}

.service-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.service-detail.reverse .service-content {
  grid-template-columns: 1fr 1fr;
}

.service-detail.reverse .service-text {
  order: 2;
}

.service-detail.reverse .service-visual {
  order: 1;
}

.service-text {
  padding: 20px;
}

.service-text h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.service-description {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.service-features,
.service-applications,
.service-tech,
.service-platforms,
.service-tools {
  margin-bottom: 2rem;
}

.service-features h3,
.service-applications h3,
.service-tech h3,
.service-platforms h3,
.service-tools h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.service-features ul {
  list-style: none;
  padding: 0;
}

.service-features li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

.tech-tags,
.app-tags,
.platform-tags,
.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tag,
.app-tag,
.platform-tag,
.tool-tag {
  background: var(--gradient-primary);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.tech-tag:hover,
.app-tag:hover,
.platform-tag:hover,
.tool-tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.service-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.service-svg {
  width: 300px;
  height: 200px;
  cursor: pointer;
  transition: transform 0.3s ease;
  border-radius: 12px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  background: white;
}

.service-svg:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
}

/* 服务流程样式 */
.service-process {
  padding: 80px 0;
  background: var(--surface-color);
}

.service-process h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  color: var(--text-primary);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.step {
  text-align: center;
  padding: 2rem;
  background: var(--background-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

.step:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 1rem;
}

.step h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.step p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .service-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .service-detail.reverse .service-text,
  .service-detail.reverse .service-visual {
    order: unset;
  }
  
  .service-text h2 {
    font-size: 1.8rem;
  }
  
  .service-svg {
    width: 250px;
    height: 150px;
  }
}

/* 产品页面样式 */
.product-image {
  cursor: pointer;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.product-svg {
  width: 100%;
  height: 200px;
  transition: transform 0.3s ease;
}

.product-image:hover .product-svg {
  transform: scale(1.05);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: var(--transition);
}

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

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

.service-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.service-card h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.service-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.service-features {
  list-style: none;
  padding: 0;
}

.service-features li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.9rem;
}

.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

/* 公司优势 */
.advantages {
  padding: 5rem 0;
  background: var(--background-color);
}

.advantages h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.advantages-text {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 800px;
  width: 100%;
}

.advantage-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--surface-color);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  text-align: left;
}

.advantage-item:hover {
  transform: translateX(10px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-color);
}

.advantage-icon {
  font-size: 2rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

.advantage-content h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.advantage-content p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.advantages-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.advantages-svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
  animation: float 4s ease-in-out infinite;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .advantages-text {
    grid-template-columns: 1fr;
    max-width: 400px;
  }
  
  /* UMBot页面移动端适配 */
  .umbot-intro {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .intro-content h1 {
    font-size: 2.5rem;
  }
  
  .intro-content h2 {
    font-size: 1.5rem;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
  }
  
  .feature-item {
    padding: 0.8rem;
    font-size: 0.9rem;
  }
  
  .quick-stats {
    flex-direction: column;
    gap: 1rem;
  }
  
  .stat-item {
    padding: 1rem;
  }
  
  .stat-number {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .intro-content h1 {
    font-size: 2rem;
  }
  
  .intro-content h2 {
    font-size: 1.3rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .feature-item {
    padding: 0.6rem;
  }
  
  .stat-number {
    font-size: 1.3rem;
  }
  
  /* 技术卡片移动端适配 */
  .tech-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .tech-card {
    padding: 1.5rem;
  }
  
  .tech-card .tech-icon {
    font-size: 2.5rem;
  }
  
  .tech-card h3 {
    font-size: 1.2rem;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .advantage-item {
    padding: 1rem;
  }
  
  /* 投资方案移动端适配 */
  .investment-plans {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .plan-card {
    padding: 1.5rem;
  }
  
  .plan-card.featured {
    transform: none;
  }
  
  .plan-price .amount {
    font-size: 2.5rem;
  }
  
  /* 高亮项目移动端适配 */
  .intro-highlights {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .highlight-item {
    padding: 1rem;
    flex-direction: column;
    text-align: center;
  }
  
  .highlight-icon {
    font-size: 2rem;
  }
  
  /* 投资保障移动端适配 */
  .guarantee-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .guarantee-item {
    padding: 1.5rem;
  }
  
  .guarantee-icon {
    font-size: 2.5rem;
  }
  
  /* 投资CTA移动端适配 */
  .investment-cta {
    padding: 2rem 1rem;
  }
  
  .investment-cta h3 {
    font-size: 1.5rem;
  }
  
  .contact-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  /* 推荐项目移动端适配 */
  .recommendation-item {
    padding: 1rem;
  }
}

/* UMBot推广区域 */
.umbot-promo {
  padding: 5rem 0;
  background: var(--background-color);
  position: relative;
}

.promo-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.promo-text h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.promo-text h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.promo-text p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.feature-list {
  list-style: none;
  margin-bottom: 2rem;
}

.feature-list li {
  padding: 0.5rem 0;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.investment-info {
  background: linear-gradient(135deg, var(--surface-color) 0%, rgba(102, 126, 234, 0.05) 100%);
  padding: 2.5rem;
  border-radius: var(--border-radius-large);
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 32px rgba(102, 126, 234, 0.1);
  position: relative;
  overflow: hidden;
}

.investment-info::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
}

.investment-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.investment-info h4 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.investment-badge {
  background: linear-gradient(45deg, #ff6b6b, #ffa500);
  color: white;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  animation: pulse 2s infinite;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.investment-description {
  margin-bottom: 2rem;
}

.investment-description p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin: 0;
  line-height: 1.6;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.price-card {
  background: var(--surface-color);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem 1rem;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.price-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.price-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
}

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

.price-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.price-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  line-height: 1;
}

.price-value .currency {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-left: 0.2rem;
}

.price-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.highlight-offer {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
  position: relative;
  overflow: hidden;
}

.highlight-offer::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.offer-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.offer-content {
  flex: 1;
}

.offer-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.offer-price {
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.offer-note {
  font-size: 0.8rem;
  opacity: 0.9;
  font-weight: 400;
}

.highlight {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-color);
}

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

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

.bot-svg {
  width: 100%;
  max-width: 300px;
  height: auto;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
}

/* 返回顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  font-weight: bold;
  box-shadow: var(--shadow-medium);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-3px) scale(1.1);
  box-shadow: var(--shadow-heavy);
}

/* 页脚 */
.footer {
  background: var(--surface-color);
  padding: 3rem 0 1rem;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-section h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-section p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

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

.footer-section ul li {
  margin-bottom: 0.5rem;
}

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

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
}

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

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

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

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

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

/* UMBot页面样式 */
.umbot-hero {
  padding: 4rem 0;
  background: var(--surface-color);
}

.umbot-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.intro-content h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.intro-content h2 {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.intro-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.core-features {
  margin-bottom: 2rem;
}

.core-features h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

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

.feature-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
  background: var(--background-color);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.feature-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-color);
}

.feature-icon {
  font-size: 1.5rem;
}

.quick-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: var(--background-color);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  flex: 1;
}

.stat-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-color);
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.intro-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

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

.umbot-main-svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
}

/* 技术特性 */
.tech-features {
  padding: 5rem 0;
  background: var(--background-color);
}

.tech-features h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.tech-card {
  background: var(--surface-color);
  padding: 2rem;
  border-radius: var(--border-radius-large);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

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

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

.tech-card .tech-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.tech-card h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.tech-details ul {
  list-style: none;
  margin-bottom: 1.5rem;
}

.tech-details li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tech-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--gradient-accent);
  color: white;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tech-advantages {
  margin-top: 3rem;
}

.tech-advantages h3 {
  text-align: center;
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.advantage-item {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--surface-color);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.advantage-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-color);
}

.advantage-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.advantage-content h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.advantage-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}



/* 支付方式 */
.payment-methods {
  padding: 5rem 0;
  background: var(--surface-color);
}

.payment-methods h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.payment-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.currency-support h3,
.payment-support h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.currency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
}

.currency-item {
  background: var(--background-color);
  padding: 1rem;
  border-radius: var(--border-radius);
  text-align: center;
  font-weight: 600;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.currency-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-color);
}

.payment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

.payment-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--background-color);
  padding: 1rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.payment-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-color);
}

.payment-icon {
  font-size: 1.5rem;
}

/* 投资风险和收益分析 */
.investment-analysis {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f4fd 100%);
    border-radius: 20px;
    padding: 40px;
    margin: 40px 0;
    border: 1px solid #e1e8f0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.investment-analysis h3 {
    color: #2c3e50;
    font-size: 2.2em;
    margin-bottom: 30px;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.analysis-section {
    margin-bottom: 40px;
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.analysis-section h4 {
    color: #34495e;
    font-size: 1.5em;
    margin-bottom: 20px;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

/* 收益时间表 */
.revenue-timeline {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.timeline-item {
    border-left: 4px solid #3498db;
    padding-left: 20px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 0;
    width: 12px;
    height: 12px;
    background: #3498db;
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 3px #3498db;
}

.timeline-period {
    font-weight: bold;
    color: #2c3e50;
    font-size: 1.2em;
    margin-bottom: 15px;
}

.revenue-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.revenue-item {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: transform 0.3s ease;
}

.revenue-item:hover {
    transform: translateY(-3px);
}

.plan-name {
    font-weight: bold;
}

.revenue-range {
    font-size: 1.1em;
    font-weight: bold;
}

/* 风险矩阵 */
.risk-matrix {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.risk-item {
    border-radius: 12px;
    padding: 20px;
    border-left: 5px solid;
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.risk-item:hover {
    transform: translateY(-2px);
}

.risk-item.high-risk {
    border-left-color: #e74c3c;
    background: linear-gradient(135deg, #fff5f5 0%, #ffe8e8 100%);
}

.risk-item.medium-risk {
    border-left-color: #f39c12;
    background: linear-gradient(135deg, #fffbf0 0%, #fff3cd 100%);
}

.risk-item.low-risk {
    border-left-color: #27ae60;
    background: linear-gradient(135deg, #f0fff4 0%, #d4edda 100%);
}

.risk-level {
    font-weight: bold;
    font-size: 1.1em;
    margin-bottom: 10px;
}

.risk-content h5 {
    color: #2c3e50;
    margin-bottom: 8px;
    font-size: 1.1em;
}

.risk-content p {
    color: #555;
    margin-bottom: 10px;
    line-height: 1.5;
}

.mitigation {
    font-size: 0.9em;
    color: #666;
    font-style: italic;
    background: rgba(255, 255, 255, 0.7);
    padding: 8px 12px;
    border-radius: 6px;
}

/* 风险收益矩阵表格 */
.matrix-table {
    overflow-x: auto;
}

.matrix-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.matrix-table th,
.matrix-table td {
    padding: 15px;
    text-align: center;
    border-bottom: 1px solid #eee;
}

.matrix-table th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: bold;
}

.matrix-table tr:hover {
    background: #f8f9fa;
}

.risk-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: bold;
    color: white;
}

.risk-badge.low {
    background: #27ae60;
}

.risk-badge.medium-low {
    background: #2ecc71;
}

.risk-badge.medium {
    background: #f39c12;
}

.risk-badge.medium-high {
    background: #e67e22;
}

/* 投资建议 */
.investment-recommendations {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}

.recommendation-item {
    display: flex;
    gap: 15px;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.recommendation-item:hover {
    transform: translateY(-3px);
}

.recommendation-item.recommend {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    border-left: 5px solid #28a745;
}

.recommendation-item.caution {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    border-left: 5px solid #ffc107;
}

.rec-icon {
    font-size: 2em;
    flex-shrink: 0;
}

.rec-content h5 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 1.2em;
}

.rec-content ul {
    list-style: none;
    padding: 0;
}

.rec-content li {
    padding: 5px 0;
    color: #555;
    position: relative;
    padding-left: 20px;
}

.rec-content li::before {
    content: '•';
    color: #3498db;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* 免责声明 */
.disclaimer {
    background: linear-gradient(135deg, #fff5f5 0%, #ffe8e8 100%);
    border: 1px solid #f5c6cb;
    border-radius: 10px;
    padding: 20px;
    margin-top: 30px;
}

.disclaimer p {
    margin: 0;
    color: #721c24;
    line-height: 1.6;
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .investment-analysis {
        padding: 20px;
        margin: 20px 0;
    }
    
    .analysis-section {
        padding: 20px;
    }
    
    .revenue-grid {
        grid-template-columns: 1fr;
    }
    
    .risk-matrix {
        grid-template-columns: 1fr;
    }
    
    .investment-recommendations {
        grid-template-columns: 1fr;
    }
    
    .matrix-table {
        font-size: 0.9em;
    }
    
    .matrix-table th,
    .matrix-table td {
        padding: 10px 8px;
    }
}

/* 投资信息 */
.investment-info {
  padding: 4rem 0;
  background: var(--surface-color);
}

.investment-info h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.investment-intro {
  margin-bottom: 3rem;
}

.investment-intro h3 {
  text-align: center;
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

.intro-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.highlight-item {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--background-color);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.highlight-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-color);
}

.highlight-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.highlight-content h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.highlight-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.investment-plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.plan-card {
  background: var(--background-color);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.plan-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.plan-card.featured {
  border-color: var(--primary-color);
  transform: scale(1.02);
  box-shadow: var(--shadow-heavy);
}

.plan-card.featured::before {
  transform: scaleX(1);
  background: var(--gradient-accent);
}

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

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

.plan-badge {
  position: absolute;
  top: -10px;
  right: 20px;
  background: var(--gradient-accent);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  z-index: 2;
}

.plan-card h4 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
  margin-bottom: 0.5rem;
}

.plan-price .currency {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.plan-price .amount {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary-color);
}

.plan-price .unit {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.plan-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-style: italic;
}

.plan-features {
  margin: 1.5rem 0;
}

.feature {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
}

.feature.premium {
  color: var(--primary-color);
  font-weight: 500;
}

.plan-bonus {
  background: var(--gradient-primary);
  color: white;
  padding: 0.8rem;
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  margin-top: 1rem;
}

.plan-note {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: center;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.investment-guarantee {
  margin: 3rem 0;
}

.investment-guarantee h3 {
  text-align: center;
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.guarantee-item {
  text-align: center;
  padding: 2rem;
  background: var(--background-color);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.guarantee-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-color);
}

.guarantee-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.guarantee-item h4 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.guarantee-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.investment-cta {
  text-align: center;
  margin-top: 3rem;
  padding: 3rem;
  background: var(--background-color);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
}

.investment-cta h3 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.investment-cta p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.contact-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
}

/* 服务页面联系我们板块居中样式 */
.service-contact {
  text-align: center;
  padding: 4rem 0;
}

.service-contact h2 {
  text-align: center;
  margin-bottom: 1rem;
}

.service-contact p {
  text-align: center;
  margin-bottom: 2rem;
}

.urgency-note {
  background: var(--gradient-accent);
  color: white;
  padding: 1rem 2rem;
  border-radius: 25px;
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-block;
  animation: pulse 2s infinite;
}



/* 产品展示页面样式 */
.products-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.products-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/></svg>') repeat;
    animation: float 20s ease-in-out infinite;
}

.products-hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
    font-weight: 700;
}

.products-hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

/* 产品分类样式 */
.product-categories {
    padding: 60px 0 40px;
    background: var(--background-color);
}

.category-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.filter-btn {
    background: var(--surface-color);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: var(--transition);
    z-index: 0;
}

.filter-btn span {
    position: relative;
    z-index: 1;
}

.filter-btn:hover {
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.filter-btn:hover::before {
    left: 0;
}

.filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.filter-btn.active::before {
    left: 0;
}

/* 产品网格样式 */
.products-grid {
    padding: 40px 0 80px;
    background: var(--background-color);
}

.products-grid .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
}

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

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

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

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.product-info p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    background: var(--gradient-secondary);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: var(--transition);
}

.tag:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(79, 172, 254, 0.3);
}

/* 产品价格样式 */
.product-price {
    font-size: 1.1rem;
    font-weight: bold;
    color: #e91e63;
    margin-top: 15px;
    padding: 8px 12px;
    background: linear-gradient(135deg, #fce4ec 0%, #f8bbd9 100%);
    border-radius: 20px;
    display: inline-block;
    border: 2px solid #e91e63;
    box-shadow: 0 2px 8px rgba(233, 30, 99, 0.2);
    transition: all 0.3s ease;
}

.product-price:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(233, 30, 99, 0.3);
}

/* 新品标签样式 */
.tag.new {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 100%);
    color: white;
    font-weight: bold;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: 0 2px 10px rgba(255, 107, 107, 0.4);
}

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

/* 热门标签样式 */
.tag.hot {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    color: #d63384;
    font-weight: bold;
    position: relative;
    overflow: hidden;
}

.tag.hot::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shine 2s ease-in-out infinite;
}

@keyframes shine {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background-color: var(--background-color);
    margin: 5% auto;
    padding: 0;
    border-radius: 20px;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.close {
    position: absolute;
    top: 15px;
    right: 25px;
    color: var(--text-primary);
    font-size: 35px;
    font-weight: bold;
    z-index: 1001;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

#modal-image, .modal-image {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px 20px 0 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#modal-image svg, .modal-image svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-svg {
    width: 100%;
    height: 100%;
}

.modal-info {
    padding: 30px;
}

.modal-info h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.8rem;
}

.modal-info p {
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.modal-features {
    margin: 20px 0;
}

.modal-features h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.modal-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.modal-features li {
    padding: 8px 0;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.modal-features li:hover {
    padding-left: 10px;
    color: var(--primary-color);
}

.modal-features li:last-child {
    border-bottom: none;
}

#modal-tags, .modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

#modal-price, .modal-price {
    font-size: 1.3rem;
    font-weight: bold;
    color: #e91e63;
    margin-top: 20px;
    padding: 12px 20px;
    background: linear-gradient(135deg, #fce4ec 0%, #f8bbd9 100%);
    border-radius: 25px;
    display: inline-block;
    border: 2px solid #e91e63;
    box-shadow: 0 4px 15px rgba(233, 30, 99, 0.3);
    text-align: center;
}

/* 联系我们页面样式 */
.contact-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 100px 0 80px;
    position: relative;
    overflow: hidden;
}

.contact-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/></svg>') repeat;
    animation: float 20s ease-in-out infinite;
}

.contact-hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.contact-hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
    position: relative;
    z-index: 1;
}

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

.hero-stats .stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: #ffd700;
    margin-bottom: 0.5rem;
}

.hero-stats .stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 联系方式卡片 */
.contact-methods {
    padding: 80px 0;
    background: var(--background-color);
}

.contact-methods h2 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 3rem;
    font-size: 2.5rem;
}

.methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.method-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.method-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.method-card.priority {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(102, 126, 234, 0.05) 100%);
}

.method-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
}

.method-icon svg {
    width: 100%;
    height: 100%;
}

.method-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.method-desc {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.contact-detail {
    background: rgba(102, 126, 234, 0.1);
    padding: 10px 15px;
    border-radius: 10px;
    margin: 1rem 0;
    font-family: 'Courier New', monospace;
}

.response-time {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.contact-btn {
    display: inline-block;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: bold;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.contact-btn.primary {
    background: linear-gradient(135deg, #0088cc 0%, #005580 100%);
    animation: pulse 2s ease-in-out infinite;
}

/* 联系表单样式 */
.contact-form-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

[data-theme="dark"] .contact-form-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--surface-color);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .form-container {
    background: var(--surface-color);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.form-header h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.form-header p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.radio-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    transition: all 0.3s ease;
    background: var(--background-color);
}

.radio-label:hover {
    border-color: var(--primary-color);
}

.radio-label input[type="radio"] {
    display: none;
}

.radio-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    margin-right: 10px;
    position: relative;
    transition: all 0.3s ease;
}

.radio-label input[type="radio"]:checked + .radio-custom {
    border-color: var(--primary-color);
    background: var(--primary-color);
}

.radio-label input[type="radio"]:checked + .radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
}

.form-submit {
    text-align: center;
    margin-top: 1rem;
}

.submit-btn {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.form-note {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-success {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    border-radius: 15px;
    margin-top: 2rem;
}

.success-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* 服务保障 */
.contact-guarantee {
    padding: 80px 0;
    background: var(--background-color);
}

.contact-guarantee h2 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 3rem;
    font-size: 2.5rem;
}

.guarantee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.guarantee-item {
    text-align: center;
    padding: 2rem 1rem;
    background: var(--card-bg);
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.guarantee-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.guarantee-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.guarantee-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.guarantee-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 性能优化媒体查询 */
@media (max-width: 768px) {
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .methods-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .radio-group {
        flex-direction: column;
    }
    
    .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 移动端性能优化 */
    .service-card:hover,
    .tech-card:hover,
    .product-item:hover {
        transform: none; /* 移动端禁用hover动画 */
    }
}

@media (max-width: 480px) {
    .guarantee-grid {
        grid-template-columns: 1fr;
    }
    
    /* 小屏幕优化 */
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(15px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: 2rem;
    transition: left 0.3s ease;
    z-index: 999;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-menu a {
    font-size: 1.2rem;
    margin: 1rem 0;
    padding: 1rem 2rem;
    width: 80%;
    text-align: center;
    border-radius: var(--border-radius);
  }
  
  .hamburger {
    display: flex;
    z-index: 1000;
  }
  
  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  /* 暗黑模式下的移动端导航菜单 */
  [data-theme="dark"] .nav-menu {
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(15px);
  }
  
  [data-theme="dark"] .nav-menu a {
    color: #e2e8f0;
  }
  
  [data-theme="dark"] .nav-menu a:hover,
  [data-theme="dark"] .nav-menu a.active {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
  }
  
  .hero-content,
  .promo-content,
  .umbot-intro,
  .payment-info {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .hero-text h1 {
    font-size: 2.5rem;
  }
  
  .hero-text h2 {
    font-size: 1.5rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .services-grid,
  .tech-grid,
  .pricing-plans {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: 0 15px;
  }
  
  .back-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 45px;
    height: 45px;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 2rem;
  }
  
  .hero-text h2 {
    font-size: 1.3rem;
  }
  
  .pricing {
    flex-direction: column;
  }
  
  .contact-buttons {
    flex-direction: column;
  }
  
  .currency-grid,
  .payment-grid {
    grid-template-columns: 1fr;
  }
}

/* FAQ交互式设计样式 */
.faq-section {
  padding: 4rem 0;
  background: var(--surface-color);
}

.faq-section h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.faq-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 3rem;
}

.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--background-color);
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  box-shadow: var(--shadow-light);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-2px);
}

.faq-question {
  padding: 1.5rem 2rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--background-color);
  transition: var(--transition);
  user-select: none;
}

.faq-question:hover {
  background: var(--surface-color);
}

.faq-question h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  flex: 1;
}

.faq-toggle {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  transition: var(--transition);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(102, 126, 234, 0.1);
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  background: var(--primary-color);
  color: white;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  transition: max-height 0.4s ease-in;
}

.faq-content {
  padding: 0 2rem 2rem 2rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-content p {
  margin-bottom: 1rem;
}

.faq-content ul {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.faq-content li {
  margin-bottom: 0.5rem;
  position: relative;
}

.faq-content li::marker {
  color: var(--primary-color);
}

.faq-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* FAQ响应式设计 */
@media (max-width: 768px) {
  .faq-section {
    padding: 3rem 0;
  }
  
  .faq-section h2 {
    font-size: 2rem;
  }
  
  .faq-question {
    padding: 1.2rem 1.5rem;
  }
  
  .faq-question h3 {
    font-size: 1.1rem;
  }
  
  .faq-content {
    padding: 0 1.5rem 1.5rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .faq-question {
    padding: 1rem;
  }
  
  .faq-question h3 {
    font-size: 1rem;
  }
  
  .faq-content {
    padding: 0 1rem 1rem 1rem;
  }
  
  .faq-toggle {
    width: 25px;
    height: 25px;
    font-size: 1.2rem;
  }
}

/* 快速联系板块样式 */
.quick-contact {
  padding: 4rem 0;
  background: var(--gradient-primary);
  text-align: center;
}

[data-theme="dark"] .quick-contact {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.quick-contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.quick-contact h2 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.quick-contact p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.quick-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.quick-buttons .btn {
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.quick-buttons .btn-primary {
  background: white;
  color: var(--primary-color);
  border: 2px solid white;
}

.quick-buttons .btn-primary:hover {
  background: transparent;
  color: white;
  transform: translateY(-2px);
}

.quick-buttons .btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.quick-buttons .btn-secondary:hover {
  background: white;
  color: var(--primary-color);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .quick-contact {
    padding: 3rem 0;
  }
  
  .quick-contact h2 {
    font-size: 2rem;
  }
  
  .quick-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .quick-buttons .btn {
    width: 100%;
    max-width: 300px;
  }
}

/* 技术架构图 */
.tech-architecture {
  padding: 4rem 0;
  background: var(--surface-color);
  text-align: center;
}

.architecture-visual {
  max-width: 600px;
  margin: 0 auto;
}

.architecture-visual .advantages-svg {
  width: 100%;
  height: auto;
  max-width: 500px;
}

@media (max-width: 768px) {
  .tech-architecture {
    padding: 3rem 0;
  }
  
  .architecture-visual .advantages-svg {
    max-width: 400px;
  }
}

@media (max-width: 480px) {
  .tech-architecture {
    padding: 2rem 0;
  }
  
  .architecture-visual .advantages-svg {
    max-width: 300px;
  }
}