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

:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --secondary: #10b981;
  --dark: #1e293b;
  --light: #f8fafc;
  --gray: #64748b;
  --gray-light: #e2e8f0;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --transition: all 0.3s ease;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background-color: var(--light);
}

#targetDiv {
  max-width: 100%;
  margin: 0 auto;
}

/* 导航栏样式 */
.header {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 2rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span {
  color: var(--dark);
}

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

.nav-links a {
  text-decoration: none;
  color: var(--gray);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

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

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

/* 首屏样式 */
.hero {
  padding: 150px 2rem 100px;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  position: relative;
  overflow: hidden;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-content h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: linear-gradient(90deg, var(--dark) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--gray);
  margin-bottom: 2rem;
  max-width: 90%;
}

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

.downlbtnvmmn {
  background-color: var(--primary);
  color: white;
  padding: 1rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: var(--shadow);
}

.downlbtnvmmn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.learn-more {
  background-color: transparent;
  color: var(--primary);
  padding: 1rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  transition: var(--transition);
  border: 2px solid var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.learn-more:hover {
  background-color: var(--primary);
  color: white;
}

.hero-image {
  position: relative;
}

.hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.hero-image:hover img {
  transform: scale(1.02);
  box-shadow: var(--shadow-hover);
}

/* 特性部分 */
.features {
  padding: 8rem 2rem;
  background-color: white;
}

.section-title {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--dark);
}

.section-title p {
  font-size: 1.1rem;
  color: var(--gray);
  max-width: 700px;
  margin: 0 auto;
}

.features-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background-color: white;
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--gray-light);
  transition: var(--transition);
  text-align: center;
}

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

.feature-icon {
  width: 80px;
  height: 80px;
  background-color: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--dark);
}

.feature-card p {
  color: var(--gray);
  line-height: 1.7;
}

/* 优势部分 */
.advantages {
  padding: 8rem 2rem;
  background-color: var(--light);
}

.advantages-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.advantages-image img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.advantage-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.advantage-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.advantage-icon {
  min-width: 40px;
  height: 40px;
  background-color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.advantage-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--dark);
}

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

/* 常见问题页面 */
.faq-section {
  padding: 10rem 2rem 8rem;
  background-color: white;
}

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

.faq-item {
  margin-bottom: 1.5rem;
  border: 1px solid var(--gray-light);
  border-radius: 8px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 1.25rem;
  background-color: white;
  border: none;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

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

.faq-answer {
  padding: 0 1.25rem 1.25rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background-color: white;
}

.faq-answer p {
  color: var(--gray);
  line-height: 1.6;
}

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

.faq-toggle {
  transition: transform 0.3s ease;
}

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

/* 联系我们页面 */
.contact-section {
  padding: 10rem 2rem 8rem;
  background-color: var(--light);
}

.contact-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-info {
  background-color: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--dark);
}

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

.contact-detail {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact-icon {
  min-width: 40px;
  height: 40px;
  background-color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.contact-content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--dark);
}

.contact-content p {
  color: var(--gray);
}

.contact-form {
  background-color: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.contact-form h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--dark);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-light);
  border-radius: 6px;
  font-size: 1rem;
  transition: var(--transition);
}

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

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

.submit-btn {
  background-color: var(--primary);
  color: white;
  padding: 0.75rem 2rem;
  border-radius: 6px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  width: 100%;
}

.submit-btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* 页脚 */
.footer {
  background-color: var(--dark);
  color: white;
  padding: 3rem 2rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.footer-column h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

.footer-links a:hover {
  color: var(--primary);
  transform: translateX(5px);
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: var(--transition);
  text-decoration: none;
}

.social-link:hover {
  background-color: var(--primary);
  transform: translateY(-3px);
}

.footer-bottom {
  max-width: 1200px;
  margin: 2rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: var(--gray-light);
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .hero-content h1 {
    font-size: 3rem;
  }
  
  .advantages-container {
    grid-template-columns: 1fr;
  }
  
  .advantages-image {
    order: 2;
  }
  
  .advantages-content {
    order: 1;
  }
}

@media (max-width: 768px) {
  .header {
    padding: 1rem;
  }
  
  .nav-links {
    display: none;
  }
  
  .hero {
    padding: 120px 1rem 80px;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-content p {
    max-width: 100%;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .features {
    padding: 6rem 1rem;
  }
  
  .advantages {
    padding: 6rem 1rem;
  }
  
  .contact-section {
    padding: 8rem 1rem 6rem;
  }
  
  .contact-container {
    grid-template-columns: 1fr;
  }
  
  .faq-section {
    padding: 8rem 1rem 6rem;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .social-links {
    justify-content: center;
  }
}