/* 全局样式重置和基础设置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2563eb;
  --secondary-color: #7c3aed;
  --accent-color: #06b6d4;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --bg-light: #f9fafb;
  --bg-white: #ffffff;
  --border-color: #e5e7eb;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-white);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

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

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  margin-bottom: 1rem;
}

/* 头部导航栏样式 */
#header-container {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}

.header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
}

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

.nav-menu a {
  color: var(--text-primary);
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
}

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

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

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

/* Hero Section */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1200px;
  margin: 4rem auto;
  padding: 0 2rem;
  align-items: center;
  min-height: 60vh;
}

.hero-content h1 {
  font-size: 3rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

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

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

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

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

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

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

.btn-small {
  padding: 0.5rem 1.5rem;
  font-size: 0.875rem;
}

.hero-image img {
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
}

/* Section通用样式 */
section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

section h2 {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.section-desc {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* 核心价值区域 */
.value-proposition {
  background: var(--bg-light);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.value-card {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: center;
}

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

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

.value-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

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

/* 产品中心预览 */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.product-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.product-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.product-card h3 {
  padding: 1.5rem 1.5rem 0.5rem;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.product-card > p {
  padding: 0 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.product-features {
  list-style: none;
  padding: 0 1.5rem;
  margin-bottom: 1.5rem;
}

.product-features li {
  padding: 0.25rem 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.product-link {
  display: block;
  padding: 1rem 1.5rem;
  color: var(--primary-color);
  font-weight: 600;
  border-top: 1px solid var(--border-color);
  transition: background 0.3s ease;
}

.product-link:hover {
  background: var(--bg-light);
}

.view-more {
  text-align: center;
}

/* 解决方案轮播 */
.solutions-carousel {
  position: relative;
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-bottom: 2rem;
}

.solution-item {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  padding: 3rem;
  align-items: center;
}

.solution-item.active {
  display: grid;
}

.solution-content h3 {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.solution-content p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

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

.solution-benefits li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
}

.solution-image img {
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.carousel-controls {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--primary-color);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s ease;
}

.carousel-dot.active {
  background: var(--primary-color);
  transform: scale(1.2);
}

/* 成功案例 */
.cases-preview {
  background: var(--bg-light);
}

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

.case-card {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
}

.case-card:hover {
  transform: translateY(-5px);
}

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

.case-logo {
  width: 80px;
  height: 40px;
  object-fit: contain;
}

.case-industry {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
}

.case-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.case-results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.result-item {
  text-align: center;
  padding: 1rem;
  background: var(--bg-light);
  border-radius: 8px;
}

.result-number {
  display: block;
  font-size: 1.75rem;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

.result-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.case-card > p {
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.case-link {
  color: var(--primary-color);
  font-weight: 600;
}

.case-link:hover {
  text-decoration: underline;
}

/* 数据统计 */
.stats-section {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

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

.stat-item {
  padding: 2rem;
}

.stat-number {
  display: block;
  font-size: 3.5rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1.125rem;
  opacity: 0.9;
}

/* 技术支持预览 */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.support-card {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform 0.3s ease;
}

.support-card:hover {
  transform: translateY(-5px);
}

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

.support-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.support-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.support-link {
  color: var(--primary-color);
  font-weight: 600;
}

.support-link:hover {
  text-decoration: underline;
}

/* CTA区域 */
.cta-section {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  text-align: center;
  border-radius: 16px;
  margin: 4rem auto;
}

.cta-content h2 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.cta-content p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

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

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

.cta-buttons .btn-primary:hover {
  background: var(--bg-light);
}

.cta-buttons .btn-secondary {
  background: transparent;
  color: white;
  border-color: white;
}

.cta-buttons .btn-secondary:hover {
  background: white;
  color: var(--primary-color);
}

/* 底部 */
#footer-container {
  background: var(--text-primary);
  color: white;
  padding: 3rem 2rem 1rem;
}

.footer {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-section h3 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: white;
}

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

.footer-section ul li {
  margin-bottom: 0.75rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .hero-section {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .hero-content h1 {
    font-size: 2rem;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .solution-item {
    grid-template-columns: 1fr;
    padding: 2rem;
  }
  
  .nav-menu {
    display: none;
  }
  
  section h2 {
    font-size: 2rem;
  }
  
  .stat-number {
    font-size: 2.5rem;
  }
}

/* 浮动窗口样式 */
#float-window-container {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 999;
}

.float-window {
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 1rem;
  max-width: 300px;
}

.float-window-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
}