/* 现代化博览记落地页样式 */

/* CSS 变量定义 */
:root {
  /* 主色调 */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --primary-color: #667eea;
  --primary-dark: #5a67d8;
  --secondary-color: #764ba2;

  /* 中性色 */
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-light: #a0aec0;

  /* 背景色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-muted: #f1f5f9;
  --bg-card: #ffffff;

  /* 边框和阴影 */
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* 间距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* 圆角 */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* 动画 */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
}

/* 重置样式 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

/* 背景装饰 */
.bg-decoration {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.bg-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.03) 0%, rgba(118, 75, 162, 0.03) 100%);
}

.bg-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle at 25% 25%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
                    radial-gradient(circle at 75% 75%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(1deg); }
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

/* 导航栏 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  min-height: 70px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
  transition: transform var(--transition-fast);
}

.brand:hover {
  transform: translateY(-1px);
}

.brand-icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  /* background: var(--primary-gradient); */
  border-radius: var(--radius-lg);
  /* box-shadow: var(--shadow-md); */
}

.brand-icon {
  width: 30px;
  height: 30px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  position: relative;
}

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

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

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-normal);
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn.large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
}

.btn.small {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
}

.btn.primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow-md);
}

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

.btn.secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn.secondary:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-1px);
}

.btn.ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn.ghost:hover {
  background: var(--bg-secondary);
  color: var(--primary-color);
  border-color: var(--primary-color);
}

/* Hero 区域 */
.hero {
  padding: 120px 0 80px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(102, 126, 234, 0.1);
  color: var(--primary-color);
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 0.8s ease-out;
}

.badge-icon {
  font-size: 1rem;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.title-main {
  display: block;
  color: var(--text-primary);
}

.title-highlight {
  display: block;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-2xl);
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  animation: fadeInUp 0.8s ease-out 0.8s both;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-md);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-light);
}

.feature-item .feature-icon {
  font-size: 1.25rem;
}

.feature-item span {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Hero 视觉部分 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-screenshots {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.screenshot-small {
  position: relative;
  z-index: 2;
  transform: translateY(20px);
}

.screenshot-large {
  position: relative;
  z-index: 1;
  margin-left: -30px;
}

.hero-screenshot-small {
  width: 200px;
  height: auto;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--bg-card);
}

.hero-screenshot-large {
  width: 280px;
  height: auto;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  border: 4px solid var(--bg-card);
}

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

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translateY(0);
  }
  40%, 43% {
    transform: translateY(-10px);
  }
  70% {
    transform: translateY(-5px);
  }
}

/* 悬停动画增强 */
.btn:hover {
  animation: pulse 0.6s ease-in-out;
}

.feature-card:hover .feature-icon {
  animation: bounce 0.8s ease-in-out;
}



/* 通用区域样式 */
.section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

/* 区域背景色交替 */
.section:nth-child(even) {
  background: var(--bg-secondary);
}

.section:nth-child(odd) {
  background: var(--bg-primary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(102, 126, 234, 0.1);
  color: var(--primary-color);
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* 特性部分 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.feature-icon-wrapper {
  position: relative;
  width: 60px;
  height: 60px;
  margin-bottom: var(--spacing-lg);
}

.feature-card .feature-icon {
  font-size: 2rem;
  position: relative;
  z-index: 2;
}

.icon-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary-gradient);
  border-radius: var(--radius-lg);
  opacity: 0.1;
}

.feature-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.feature-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.feature-tags {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.tag {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(102, 126, 234, 0.1);
  color: var(--primary-color);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}

/* 截图展示部分 */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  max-width: 1000px;
  margin: 0 auto;
}

.screenshot-item {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  /* box-shadow: var(--shadow-md); */
  transition: all var(--transition-normal);
}

.screenshot-item:hover {
  /* box-shadow: var(--shadow-lg); */
}

.screenshot-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.screenshot-wrapper img {
  width: 100%;
  height: auto;
  display: block;
}

.screenshot-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: white;
  padding: var(--spacing-lg);
  transform: translateY(100%);
  transition: transform var(--transition-normal);
}

.screenshot-item:hover .screenshot-overlay {
  transform: translateY(0);
}

.overlay-content h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.overlay-content p {
  font-size: 0.875rem;
  opacity: 0.9;
}

/* 隐私部分 */
.privacy-content {
  display: grid;
  gap: var(--spacing-3xl);
}

.privacy-principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.principle-card {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.principle-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.principle-icon .icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: rgba(102, 126, 234, 0.1);
  border-radius: var(--radius-lg);
}

.principle-icon .icon {
  font-size: 1.5rem;
}

.principle-content h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.principle-content p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.privacy-summary {
  max-width: 800px;
  margin: 0 auto;
}

.summary-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
}

.summary-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.data-flow {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.flow-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.flow-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: var(--radius-lg);
  font-size: 1.5rem;
}

.flow-icon.local {
  background: rgba(34, 197, 94, 0.1);
}

.flow-icon.cloud {
  background: rgba(59, 130, 246, 0.1);
}

.flow-icon.blocked {
  background: rgba(239, 68, 68, 0.1);
}

.flow-content {
  flex: 1;
}

.flow-content h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.flow-content p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-xs);
}

.status {
  font-size: 0.75rem;
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.status.safe {
  background: rgba(34, 197, 94, 0.1);
  color: #16a34a;
}

.status.blocked {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

.privacy-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .hero-inner {
    gap: var(--spacing-2xl);
  }

  .floating-card {
    display: none;
  }

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

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

  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    text-align: center;
  }

  .hero-content {
    order: 2;
  }

  .hero-visual {
    order: 1;
  }

  .phone-frame {
    width: 250px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

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

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

  .screenshots-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-screenshots {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .screenshot-large {
    margin-left: 0;
  }

  .privacy-principles {
    grid-template-columns: 1fr;
  }

  .privacy-actions {
    flex-direction: column;
    align-items: center;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .contact-card {
    flex-direction: column;
    text-align: center;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .footer-links {
    gap: var(--spacing-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

  .privacy-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .feature-card {
    padding: var(--spacing-lg);
  }

  .principle-card {
    padding: var(--spacing-lg);
  }

  .summary-card {
    padding: var(--spacing-lg);
  }

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

  .hero-screenshot-small,
  .hero-screenshot-large {
    width: 220px;
  }
}

/* 其他通用样式 */
.text-center {
  text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

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

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* FAQ 部分 */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  gap: var(--spacing-md);
}

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.faq-question:hover {
  background: var(--bg-secondary);
}

.faq-question h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.faq-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: rgba(102, 126, 234, 0.1);
  border-radius: var(--radius-md);
  color: var(--primary-color);
  transition: transform var(--transition-normal);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
  max-height: 200px;
}

.faq-answer-content {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.faq-answer p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* 联系部分 */
.contact-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  max-width: 800px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-2xl);
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: var(--primary-gradient);
  border-radius: var(--radius-lg);
  color: white;
  flex-shrink: 0;
}

.contact-info h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
}

.contact-link {
  display: inline-block;
  color: var(--primary-color);
  font-weight: 600;
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(102, 126, 234, 0.1);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.contact-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-1px);
}

.contact-note {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-style: italic;
}

/* 页脚 */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  margin-top: var(--spacing-3xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand .brand {
  margin-bottom: var(--spacing-md);
}

.footer-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  max-width: 300px;
}

.footer-links {
  display: flex;
  gap: var(--spacing-3xl);
}

.footer-section h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.footer-section a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-light);
}

.footer-copyright p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0;
}

.footer-note {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-style: italic;
}

/* 旧版隐私部分样式兼容 */
.privacy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.commitment-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--spacing-lg);
}

.commitment-list li {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.commitment-list .icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.commitment-list h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.commitment-list p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.fact-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.fact-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.fact-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--spacing-lg) 0;
  display: grid;
  gap: var(--spacing-sm);
}

.fact-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
}

.badge {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge.ok {
  background: rgba(34, 197, 94, 0.1);
  color: #16a34a;
}

.badge.no {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

.cta-inline {
  margin-top: var(--spacing-md);
}

.section-sub {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
  line-height: 1.6;
}

/* 额外的视觉增强 */
.hero-badge:hover {
  transform: scale(1.05);
  background: rgba(102, 126, 234, 0.15);
}

.section-badge:hover {
  transform: scale(1.05);
  background: rgba(102, 126, 234, 0.15);
}

/* 选择文本的样式 */
::selection {
  background: rgba(102, 126, 234, 0.2);
  color: var(--text-primary);
}

::-moz-selection {
  background: rgba(102, 126, 234, 0.2);
  color: var(--text-primary);
}

/* 焦点样式 */
.btn:focus,
.nav-link:focus,
.contact-link:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* 加载状态 */
.loading {
  opacity: 0.7;
  pointer-events: none;
}

/* 平滑的页面过渡 */
.page-transition {
  transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

/* 图片懒加载效果 */
img[loading="lazy"] {
  transition: opacity 0.3s ease-out;
}

img[loading="lazy"]:not([src]) {
  opacity: 0;
}

/* 深色模式支持（预留） */
@media (prefers-color-scheme: dark) {
  /* 这里可以添加深色模式的样式 */
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .bg-pattern {
    animation: none;
  }
}