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

body {
  font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f0f2f5;
  background-image: linear-gradient(135deg, #f0f2f5 0%, #e6e9f0 100%);
  min-height: 100vh;
}

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

/* 悬浮下载条 */
.floating-download {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(10, 25, 47, 0.95);
  backdrop-filter: blur(10px);
  text-align: center;
  padding: 12px 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.btn-download {
  display: inline-block;
  background-color: #0070f3;
  color: white;
  padding: 12px 24px;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 112, 243, 0.3);
}

.btn-download:hover {
  background-color: #0056b3;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 112, 243, 0.4);
}

/* 导航栏 */
.navbar {
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  padding: 20px 0;
  margin-top: 60px;
  transition: all 0.3s ease;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-size: 28px;
  font-weight: 700;
  color: #0070f3;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo a::before {
  content: '⚡';
  font-size: 32px;
}

.nav-links {
  display: flex;
  gap: 40px;
}

.nav-links a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  font-size: 16px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: #0070f3;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: #0070f3;
  transition: width 0.3s ease;
}

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

.nav-actions {
  display: flex;
  gap: 20px;
  align-items: center;
}

.btn-download-sm {
  background-color: #0070f3;
  color: white;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 112, 243, 0.3);
}

.btn-download-sm:hover {
  background-color: #0056b3;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 112, 243, 0.4);
}

.btn-login {
  background-color: transparent;
  color: #333;
  padding: 10px 20px;
  text-decoration: none;
  border: 1px solid #eaeaea;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
  background-color: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.btn-login:hover {
  background-color: #f7f7f7;
  border-color: #0070f3;
  color: #0070f3;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 112, 243, 0.2);
}

/* 面包屑导航 */
.breadcrumb {
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(5px);
  padding: 15px 0;
  border-bottom: 1px solid #eaeaea;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.breadcrumb span {
  font-size: 14px;
  color: #666;
}

.breadcrumb a {
  color: #0070f3;
  text-decoration: none;
  transition: color 0.3s ease;
}

.breadcrumb a:hover {
  color: #0056b3;
  text-decoration: underline;
}

/* 头部区域 */
.hero {
  background: linear-gradient(135deg, #0070f3 0%, #0056b3 100%);
  color: white;
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.05)"/></svg>');
  background-size: cover;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 25px;
  line-height: 1.2;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero p {
  font-size: 20px;
  margin-bottom: 50px;
  opacity: 0.9;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.stats {
  display: flex;
  justify-content: center;
  gap: 80px;
  flex-wrap: wrap;
  margin-top: 40px;
}

.stat-item {
  text-align: center;
  background-color: rgba(255, 255, 255, 0.1);
  padding: 30px 40px;
  border-radius: 12px;
  backdrop-filter: blur(10px);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.stat-number {
  display: block;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 10px;
  font-family: 'Segoe UI', monospace;
}

.stat-label {
  font-size: 16px;
  opacity: 0.9;
  font-weight: 500;
}

/* 核心功能区 */
.core-features {
  padding: 80px 0;
  background-color: white;
  position: relative;
}

.core-features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #0070f3, #00c6ff);
}

.core-features h2 {
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 60px;
  color: #333;
  position: relative;
}

.core-features h2::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: #0070f3;
  border-radius: 2px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.feature-item {
  background-color: #f8f9fa;
  padding: 40px;
  border-radius: 16px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid #eaeaea;
  position: relative;
  overflow: hidden;
}

.feature-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #0070f3, #00c6ff);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.feature-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 30px rgba(0, 0, 0, 0.1);
  border-color: #0070f3;
}

.feature-item:hover::before {
  transform: scaleX(1);
}

.feature-item h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 20px;
  color: #0070f3;
  position: relative;
  z-index: 1;
}

.feature-item p {
  font-size: 16px;
  color: #666;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.feature-item::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 200px;
  height: 200px;
  background-color: rgba(0, 112, 243, 0.05);
  border-radius: 50%;
  transition: transform 0.3s ease;
  z-index: 0;
}

.feature-item:hover::after {
  transform: translate(-50%, -50%) scale(1);
}

/* 价格套餐区域 */
.pricing {
  padding: 80px 0;
  background-color: #f8f9fa;
  position: relative;
}

.pricing::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #00c6ff, #0070f3);
}

.pricing h2 {
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 60px;
  color: #333;
  position: relative;
}

.pricing h2::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: #0070f3;
  border-radius: 2px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.pricing-card {
  background-color: white;
  padding: 40px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid #eaeaea;
  position: relative;
  overflow: hidden;
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
  border-color: #0070f3;
}

.pricing-card.featured {
  border: 2px solid #0070f3;
  transform: scale(1.05);
  box-shadow: 0 15px 35px rgba(0, 112, 243, 0.2);
}

.pricing-card.featured::before {
  content: '推荐';
  position: absolute;
  top: 20px;
  right: -35px;
  background-color: #0070f3;
  color: white;
  padding: 5px 40px;
  font-size: 14px;
  font-weight: 600;
  transform: rotate(45deg);
  box-shadow: 0 2px 10px rgba(0, 112, 243, 0.3);
}

.pricing-card h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 25px;
  color: #333;
}

.pricing-card .price {
  font-size: 40px;
  font-weight: 700;
  color: #0070f3;
  margin-bottom: 30px;
  font-family: 'Segoe UI', monospace;
}

.pricing-card ul {
  list-style: none;
  margin-bottom: 40px;
  text-align: left;
}

.pricing-card li {
  padding: 15px 0;
  border-bottom: 1px solid #eaeaea;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-card li::before {
  content: '✓';
  color: #28a745;
  font-weight: bold;
  font-size: 18px;
}

.pricing-card li:last-child {
  border-bottom: none;
}

.btn-pricing {
  display: inline-block;
  background-color: #0070f3;
  color: white;
  padding: 15px 30px;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 112, 243, 0.3);
  width: 100%;
}

.btn-pricing:hover {
  background-color: #0056b3;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 112, 243, 0.4);
}

/* 行动召唤区 */
.cta-section {
  background: linear-gradient(135deg, #0070f3 0%, #0056b3 100%);
  color: white;
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.05)"/></svg>');
  background-size: cover;
  z-index: 0;
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 25px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.cta-section p {
  font-size: 20px;
  margin-bottom: 40px;
  opacity: 0.9;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.btn-cta {
  display: inline-block;
  background-color: white;
  color: #0070f3;
  padding: 18px 40px;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 18px;
  transition: all 0.3s ease;
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.3);
}

.btn-cta:hover {
  background-color: #f8f9fa;
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(255, 255, 255, 0.4);
}

/* 差异化说明区 */
.differentiation {
  padding: 80px 0;
  background-color: white;
  position: relative;
}

.differentiation::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #0070f3, #00c6ff);
}

.differentiation h2 {
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 60px;
  color: #333;
  position: relative;
}

.differentiation h2::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: #0070f3;
  border-radius: 2px;
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.diff-item {
  text-align: center;
  padding: 40px;
  background-color: #f8f9fa;
  border-radius: 16px;
  transition: all 0.3s ease;
  border: 1px solid #eaeaea;
  position: relative;
  overflow: hidden;
}

.diff-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 30px rgba(0, 0, 0, 0.1);
  border-color: #0070f3;
}

.diff-item h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 20px;
  color: #0070f3;
  position: relative;
  z-index: 1;
}

.diff-item p {
  font-size: 16px;
  color: #666;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.diff-item::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 200px;
  height: 200px;
  background-color: rgba(0, 112, 243, 0.05);
  border-radius: 50%;
  transition: transform 0.3s ease;
  z-index: 0;
}

.diff-item:hover::after {
  transform: translate(-50%, -50%) scale(1);
}

/* 用户评价区 */
.testimonials {
  padding: 80px 0;
  background-color: #f8f9fa;
  position: relative;
}

.testimonials::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #00c6ff, #0070f3);
}

.testimonials h2 {
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 60px;
  color: #333;
  position: relative;
}

.testimonials h2::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: #0070f3;
  border-radius: 2px;
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.testimonial-item {
  background-color: white;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid #eaeaea;
  position: relative;
}

.testimonial-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
  border-color: #0070f3;
}

.testimonial-item::before {
  content: '"';
  position: absolute;
  top: 20px;
  left: 20px;
  font-size: 60px;
  color: rgba(0, 112, 243, 0.1);
  font-family: Georgia, serif;
}

.testimonial-item p {
  font-size: 16px;
  margin-bottom: 30px;
  line-height: 1.6;
  color: #666;
  position: relative;
  z-index: 1;
  font-style: italic;
}

.user-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 1;
}

.user-name {
  font-weight: 600;
  color: #333;
  font-size: 16px;
}

.user-rating {
  color: #f39c12;
  font-weight: bold;
  font-size: 16px;
}

/* 常见问题区 */
.faq {
  padding: 80px 0;
  background-color: white;
  position: relative;
}

.faq::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #0070f3, #00c6ff);
}

.faq h2 {
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 60px;
  color: #333;
  position: relative;
}

.faq h2::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: #0070f3;
  border-radius: 2px;
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 15px;
  border: 1px solid #eaeaea;
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  border-color: #0070f3;
}

.faq-question {
  background-color: #f8f9fa;
  padding: 20px 25px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 16px;
  color: #333;
}

.faq-question:hover {
  background-color: #e9ecef;
}

.faq-question::after {
  content: '+';
  font-size: 20px;
  font-weight: bold;
  color: #0070f3;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
  content: '-';
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 25px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  background-color: white;
}

.faq-item.active .faq-answer {
  padding: 25px;
  max-height: 300px;
}

.faq-answer p {
  font-size: 16px;
  color: #666;
  line-height: 1.6;
}

/* 页脚 */
.footer {
  background-color: #0a192f;
  color: white;
  padding: 80px 0 40px;
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #0070f3, #00c6ff);
}

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

.footer-section h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 25px;
  color: #0070f3;
  position: relative;
  padding-bottom: 10px;
}

.footer-section h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: #0070f3;
  border-radius: 1px;
}

.footer-section p {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 20px;
  color: #a8b2d1;
}

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

.footer-section li {
  margin-bottom: 15px;
}

.footer-section a {
  color: #a8b2d1;
  text-decoration: none;
  font-size: 16px;
  transition: all 0.3s ease;
  display: inline-block;
  position: relative;
}

.footer-section a:hover {
  color: #0070f3;
  transform: translateX(5px);
}

.footer-section a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: #0070f3;
  transition: width 0.3s ease;
}

.footer-section a:hover::after {
  width: 100%;
}

.footer-bottom {
  border-top: 1px solid #172a45;
  padding-top: 40px;
  text-align: center;
  font-size: 14px;
  color: #64ffda;
}

.footer-bottom p {
  margin: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .navbar .container {
    flex-direction: column;
    gap: 20px;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
  }
  
  .hero h1 {
    font-size: 36px;
  }
  
  .hero p {
    font-size: 18px;
  }
  
  .stats {
    gap: 40px;
  }
  
  .stat-item {
    padding: 20px 30px;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-section h3::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .btn-cta {
    padding: 15px 30px;
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 60px 0;
  }
  
  .hero h1 {
    font-size: 28px;
  }
  
  .hero p {
    font-size: 16px;
  }
  
  .core-features,
  .pricing,
  .cta-section,
  .differentiation,
  .testimonials,
  .faq,
  .footer {
    padding: 60px 0;
  }
  
  .feature-grid,
  .pricing-grid,
  .diff-grid,
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  
  .feature-item,
  .diff-item,
  .testimonial-item,
  .pricing-card {
    padding: 30px;
  }
  
  .core-features h2,
  .pricing h2,
  .differentiation h2,
  .testimonials h2,
  .faq h2,
  .cta-section h2 {
    font-size: 28px;
  }
  
  .stats {
    gap: 20px;
  }
  
  .stat-item {
    padding: 15px 20px;
  }
  
  .stat-number {
    font-size: 28px;
  }
  
  .btn-cta {
    padding: 12px 24px;
    font-size: 14px;
  }
}