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

/* 基础样式 */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

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

/* 导航栏 */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  font-size: 24px;
  font-weight: bold;
  background: linear-gradient(135deg, #16a34a, #10b981);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 16px;
  font-weight: 500;
  color: #4b5563;
  padding: 8px 12px;
  border-radius: 6px;
  transition: all 0.3s;
}

.nav-link:hover,
.nav-link.active {
  color: #16a34a;
  background-color: #f0fdf4;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background-color: #4b5563;
  transition: all 0.3s;
}

/* Hero区域 */
.hero {
  background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 50%, #fff 100%);
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(22, 163, 74, 0.05) 0%, rgba(16, 185, 129, 0.03) 100%);
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 56px;
  font-weight: bold;
  color: #111827;
  margin-bottom: 16px;
  animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
  font-size: 28px;
  color: #4b5563;
  margin-bottom: 12px;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-description {
  font-size: 18px;
  color: #6b7280;
  margin-bottom: 32px;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

/* 按钮样式 */
.btn {
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 8px;
  transition: all 0.3s;
  display: inline-block;
}

.btn-primary {
  background: linear-gradient(135deg, #16a34a, #10b981);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(22, 163, 74, 0.3);
}

.btn-secondary {
  border: 2px solid #16a34a;
  color: #16a34a;
  background: white;
}

.btn-secondary:hover {
  background: #f0fdf4;
  transform: translateY(-2px);
}

.btn-light {
  background: white;
  color: #16a34a;
  font-weight: 600;
}

.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(255, 255, 255, 0.3);
}

/* 核心亮点 */
.highlights {
  padding: 60px 0;
  background: white;
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.highlight-card {
  background: white;
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  text-align: center;
  transition: all 0.3s;
}

.highlight-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.highlight-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: #f0fdf4;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.highlight-title {
  font-size: 20px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 8px;
}

.highlight-desc {
  color: #6b7280;
  font-size: 15px;
}

/* 功能区域 */
.features {
  padding: 80px 0;
  background: linear-gradient(to bottom, white, #f9fafb);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 40px;
  font-weight: bold;
  color: #111827;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 18px;
  color: #6b7280;
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: white;
  padding: 28px;
  border-radius: 12px;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.06);
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.feature-title {
  font-size: 18px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 12px;
}

.feature-desc {
  color: #6b7280;
  font-size: 14px;
  line-height: 1.6;
}

/* 关于我们 */
.about {
  padding: 80px 0;
  background: white;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-text {
  font-size: 17px;
  color: #4b5563;
  line-height: 1.8;
  margin-bottom: 20px;
}

/* CTA区域 */
.cta {
  padding: 80px 0;
  background: linear-gradient(135deg, #16a34a, #10b981);
  text-align: center;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
}

.cta-title {
  font-size: 36px;
  font-weight: bold;
  color: white;
  margin-bottom: 16px;
}

.cta-subtitle {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 32px;
}

/* 页脚 */
.footer {
  background: linear-gradient(to right, #f9fafb, #f0fdf4);
  border-top: 1px solid #e5e7eb;
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 32px;
}

.footer-title {
  font-size: 18px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 16px;
}

.footer-text {
  color: #6b7280;
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 8px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-link {
  color: #6b7280;
  font-size: 14px;
  transition: color 0.3s;
}

.footer-link:hover {
  color: #16a34a;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid #e5e7eb;
  text-align: center;
}

.footer-copyright {
  color: #6b7280;
  font-size: 14px;
}

/* 页面标题 */
.page-header {
  background: linear-gradient(135deg, #16a34a, #10b981);
  padding: 60px 0;
  text-align: center;
  color: white;
}

.page-header-content {
  max-width: 800px;
  margin: 0 auto;
}

.page-header-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.page-header-title {
  font-size: 48px;
  font-weight: bold;
  margin-bottom: 16px;
}

.page-header-subtitle {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.9);
}

/* 产品功能详情 */
.product-features {
  padding: 60px 0;
  background: #f9fafb;
}

.product-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: 32px;
}

.product-feature-card {
  background: white;
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s;
}

.product-feature-card:hover {
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
}

.product-feature-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.product-feature-icon {
  font-size: 48px;
  background: #f0fdf4;
  padding: 12px;
  border-radius: 12px;
}

.product-feature-title {
  font-size: 24px;
  font-weight: 600;
  color: #111827;
}

.product-feature-desc {
  color: #6b7280;
  font-size: 16px;
  margin-bottom: 20px;
  line-height: 1.6;
}

.product-feature-list {
  list-style: none;
}

.product-feature-list li {
  color: #4b5563;
  font-size: 15px;
  padding: 8px 0;
  line-height: 1.6;
}

/* 产品优势 */
.advantages {
  padding: 60px 0;
  background: linear-gradient(to bottom, white, #f0fdf4);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.advantage-card {
  background: white;
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.06);
  text-align: center;
  transition: all 0.3s;
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.advantage-icon {
  font-size: 32px;
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: #f9fafb;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.advantage-title {
  font-size: 20px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 8px;
}

.advantage-desc {
  color: #6b7280;
  font-size: 14px;
}

/* 适用场景 */
.use-cases {
  padding: 60px 0;
  background: white;
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.use-case-card {
  background: white;
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.use-case-title {
  font-size: 22px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 16px;
}

.use-case-desc {
  color: #4b5563;
  font-size: 15px;
  line-height: 1.7;
}

/* 隐私协议样式 */
.privacy-highlights {
  padding: 48px 0;
  background: white;
}

.privacy-highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.privacy-highlight-card {
  background: white;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.06);
  text-align: center;
}

.privacy-highlight-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.privacy-highlight-title {
  font-size: 18px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 8px;
}

.privacy-highlight-desc {
  color: #6b7280;
  font-size: 14px;
}

.privacy-content {
  padding: 60px 0;
  background: #f9fafb;
}

.privacy-card {
  background: white;
  padding: 48px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  max-width: 900px;
  margin: 0 auto;
}

.privacy-meta {
  color: #6b7280;
  font-size: 14px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid #e5e7eb;
}

.privacy-meta p {
  margin-bottom: 8px;
}

.privacy-section {
  margin-bottom: 40px;
}

.privacy-section-title {
  font-size: 24px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.privacy-section-icon {
  font-size: 24px;
}

.privacy-subsection-title {
  font-size: 20px;
  font-weight: 600;
  color: #111827;
  margin: 24px 0 12px;
}

.privacy-text {
  color: #4b5563;
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.privacy-list {
  list-style: none;
  margin: 16px 0;
  padding-left: 20px;
}

.privacy-list li {
  color: #4b5563;
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 8px;
  position: relative;
  padding-left: 20px;
}

.privacy-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: #16a34a;
  font-weight: bold;
}

.privacy-contact {
  background: #f0fdf4;
  padding: 24px;
  border-radius: 8px;
  margin: 16px 0;
}

.privacy-contact p {
  color: #4b5563;
  font-size: 15px;
  margin-bottom: 8px;
}

.privacy-notice {
  background: #fef3c7;
  border-left: 4px solid #f59e0b;
  padding: 24px;
  border-radius: 8px;
  display: flex;
  gap: 16px;
  margin-top: 32px;
}

.privacy-notice-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.privacy-notice-title {
  font-weight: 600;
  color: #111827;
  margin-bottom: 8px;
}

.privacy-notice-text {
  color: #4b5563;
  font-size: 14px;
  line-height: 1.7;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    gap: 0;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-link {
    padding: 12px;
    border-radius: 6px;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 20px;
  }

  .hero-description {
    font-size: 16px;
  }

  .section-title {
    font-size: 32px;
  }

  .page-header-title {
    font-size: 36px;
  }

  .page-header-icon {
    font-size: 48px;
  }

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

  .privacy-card {
    padding: 24px;
  }

  .privacy-section-title {
    font-size: 20px;
  }

  .privacy-subsection-title {
    font-size: 18px;
  }

  .cta-title {
    font-size: 28px;
  }

  .cta-subtitle {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 60px 0 80px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

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

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

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