/* 现代化医疗科技网站样式 */
/* 参考：Flatiron Health、美敦力、强生、GE医疗等国际医疗科技公司官网设计 */

/* 全局样式 */
:root {
  --primary-color: #1e40af;
  --primary-dark: #1e3a8a;
  --secondary-color: #059669;
  --accent-color: #f59e0b;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-light: #6b7280;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-accent: #f3f4f6;
  --border-color: #e5e7eb;
  --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);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

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

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

/* 头部导航 */
.header {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all 0.3s ease;
  box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  /* background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); */
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 16px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  object-fit: contain; /* 保证图片不变形 */
  display: block;
}

.logo-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.logo-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 400;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 15px;
  transition: all 0.3s ease;
  position: relative;
  padding: 8px 0;
}

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

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

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

/* 英雄区域 */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 140px 0 100px;
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.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="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 28px;
  color: white;
}

.hero-text p {
  font-size: 22px;
  line-height: 1.5;
  margin-bottom: 40px;
  color: rgba(255, 255, 255, 0.95);
  font-weight: 400;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

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

.btn-primary:hover {
  background: #f8fafc;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.hero-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 40px;
}

.hero-feature {
  background: rgba(255, 255, 255, 0.08);
  padding: 24px;
  border-radius: 12px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all 0.3s ease;
}

.hero-feature:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.hero-feature h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.hero-feature p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

/* 英雄区域底部文字 */
.hero-bottom-text {
  position: absolute;
  bottom: 20px;
  left: 40px;
  right: 40px;
  text-align: center;
  z-index: 10;
}

.hero-bottom-text p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
  font-weight: 300;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* 统计区域 */
.stats {
  background: white;
  padding: 100px 0;
  border-bottom: 1px solid var(--border-color);
}

.stats-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 40px;
}

.stat-item {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.stat-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.stat-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 8px;
  display: block;
}

.stat-label {
  font-size: 16px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* 核心业务区域 */
.services {
  padding: 120px 0;
  background: var(--bg-secondary);
}

.services-header {
  text-align: center;
  margin-bottom: 80px;
}

.services-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.services-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.services-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 32px;
}

.service-card {
  background: white;
  border-radius: 12px;
  padding: 40px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.service-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 24px;
  margin-bottom: 24px;
}

.service-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.service-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

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

.service-features li {
  padding: 8px 0;
  color: var(--text-secondary);
  position: relative;
  padding-left: 24px;
}

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

/* 合作伙伴区域 */
.partners {
  background: white;
  padding: 120px 0;
  border-top: 1px solid var(--border-color);
}

.partners-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}

.partners-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.partners-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 60px;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  align-items: center;
}

.partner-item {
  background: white;
  padding: 32px 24px;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.partner-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.partner-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 20px;
  margin: 0 auto 16px;
}

.partner-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

/* 联系我们区域 */
.contact {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 100px 0;
}

.contact-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}

.contact-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-subtitle {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 40px;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-top: 40px;
}

.contact-item {
  text-align: center;
}

.contact-item h4 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.contact-item p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
}

/* 页脚 */
.footer {
  background: var(--text-primary);
  color: white;
  padding: 40px 0;
  text-align: center;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-contact {
  margin-top: 32px;
  color: #fff;
  background: none;
  padding: 24px 0 0 0;
  font-size: 17px;
}

.footer-contact h4 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: #fff;
}

.footer-divider {
  width: 120px;
  height: 4px;
  background: var(--primary-color);
  border-radius: 2px;
  margin-bottom: 20px;
}

.footer-contact p {
  margin: 10px 0;
  color: #fff;
  font-size: 17px;
  letter-spacing: 0.5px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 36px;
  }

  .hero-text p {
    font-size: 18px;
  }

  .hero-features {
    grid-template-columns: 1fr;
  }

  .hero-bottom-text {
    position: relative;
    bottom: auto;
    left: auto;
    right: auto;
    margin-top: 40px;
  }

  .hero-bottom-text p {
    font-size: 14px;
  }

  .stats-content {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

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

  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .nav {
    display: none;
  }

  .footer-contact {
    font-size: 15px;
    padding: 16px 0 0 0;
  }

  .footer-contact h4 {
    font-size: 17px;
  }

  .footer-divider {
    width: 80px;
    height: 3px;
  }
}

@media (max-width: 480px) {
  .stats-content {
    grid-template-columns: 1fr;
  }

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

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}