/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #2563EB;
  --primary-dark: #1E40AF;
  --primary-light: #DBEAFE;
  --secondary: #64748B;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --text-primary: #0F172A;
  --text-secondary: #64748B;
  --text-light: #94A3B8;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-tertiary: #F1F5F9;
  --border: #E2E8F0;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 20px;
}

.logo-text {
  font-weight: 700;
}

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

/* 确保移动端菜单按钮默认隐藏 */
.mobile-menu-toggle {
  display: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s;
}

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

.language-selector {
  position: relative;
}

.lang-select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-select:hover {
  border-color: var(--primary);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s;
}

/* Buttons */
.btn-primary {
  background: var(--primary);
  color: #FFFFFF !important;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #FFFFFF !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
}

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

.btn-large {
  padding: 16px 32px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
  text-align: center;
}

/* Hero Section */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-placeholder {
  width: 100%;
  max-width: 600px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

/* Features Section */
.features {
  padding: 100px 0;
  background: var(--bg-primary);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-title {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.feature-card {
  padding: 32px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s;
}

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

.feature-icon {
  margin-bottom: 24px;
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-description {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Pricing Section */
.pricing {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  max-width: 1100px;
  margin: 0 auto;
}

.pricing-card {
  position: relative;
  background: var(--bg-primary);
  border: 2px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  transition: all 0.3s;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-lg);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  z-index: 10;
}

.pricing-header {
  margin-bottom: 32px;
}

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

.pricing-price {
  display: flex;
  align-items: baseline;
  margin-bottom: 12px;
}

.price-amount {
  font-size: 48px;
  font-weight: 800;
  color: var(--text-primary);
}

.price-period {
  font-size: 18px;
  color: var(--text-secondary);
  margin-left: 8px;
}

.pricing-description {
  font-size: 15px;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 12px 0;
  font-size: 15px;
  color: var(--text-primary);
  position: relative;
  padding-left: 28px;
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
  font-size: 18px;
}

/* Download Section */
.download {
  padding: 100px 0;
  background: var(--bg-primary);
}

.download-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.download-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s;
}

.download-btn:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.download-btn svg {
  color: var(--primary);
  flex-shrink: 0;
}

.download-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

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

.download-note {
  font-size: 14px;
  color: var(--text-secondary);
}

.download-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

  .download-image-placeholder {
    width: 100%;
    max-width: 600px;
  }
  
  .device-showcase {
    justify-content: center;
  }
  
  .device-frame {
    margin-bottom: 0;
  }
  
  @media (max-width: 768px) {
    .device-showcase {
      flex-direction: column;
      align-items: center;
    }
    
    .device-frame {
      width: 100% !important;
      max-width: 280px;
    }
  }

/* Contact Section */
.contact {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 32px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
}

.contact-item svg {
  color: var(--primary);
  flex-shrink: 0;
}

.contact-form {
  background: var(--bg-primary);
  padding: 40px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 24px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-family: inherit;
  transition: all 0.2s;
  background: var(--bg-primary);
  color: var(--text-primary);
}

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

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

/* Footer */
.footer {
  background: var(--text-primary);
  color: white;
  padding: 64px 0 32px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-section .logo {
  margin-bottom: 16px;
}

.footer-section .logo-text {
  color: white;
}

.footer-description {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  line-height: 1.6;
}

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

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-content,
  .download-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-title {
    font-size: 48px;
  }

  .section-title {
    font-size: 40px;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  /* 隐藏桌面端导航链接 */
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    width: 100%;
    background: white;
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 9999;
    display: flex !important;
    gap: 0;
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }
  
  /* 显示菜单 */
  .nav-links.active {
    transform: translateY(0) !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
  
  /* 菜单链接样式 */
  .nav-links a {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    width: 100%;
    display: block;
  }
  
  .nav-links a.active {
    color: var(--primary);
    font-weight: 600;
  }
  
  /* 语言选择器在移动菜单中的样式 */
  .nav-links .language-selector {
    width: 100%;
    margin: 12px 0;
  }
  
  .nav-links .lang-select {
    width: 100%;
  }
  
  /* 移动菜单按钮显示 */
  .mobile-menu-toggle {
    display: flex !important;
    z-index: 10000;
  }
  
  /* 汉堡菜单图标动画 */
  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .hero {
    padding: 120px 0 80px;
  }

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

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

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

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

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

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

  .features,
  .pricing,
  .download,
  .contact {
    padding: 64px 0;
  }

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

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

  .download-buttons {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

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

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

  .feature-card,
  .pricing-card,
  .contact-form {
    padding: 24px;
  }
}

/* Device Showcase */
.device-showcase {
  display: flex;
  gap: 24px;
  justify-content: center;
  align-items: flex-end;
  flex-wrap: wrap;
}

.device-frame {
  border-radius: 12px;
  padding: 8px;
  background: #1F2937;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
}

.device-frame:hover {
  transform: translateY(-8px);
}

.device-frame.macos {
  width: 280px;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
}

.device-frame.macos::before {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: #374151;
  border-radius: 0 0 4px 4px;
  margin: 0 auto 8px;
}

.device-frame.windows {
  width: 280px;
  border-radius: 4px;
}

.device-frame.mobile {
  width: 160px;
  border-radius: 24px;
  padding: 12px 6px;
}

.device-frame.mobile::before {
  content: '';
  display: block;
  width: 40px;
  height: 4px;
  background: #374151;
  border-radius: 4px;
  margin: 0 auto 8px;
}

.device-content {
  background: white;
  border-radius: 4px;
  overflow: hidden;
}

.device-frame.mobile .device-content {
  border-radius: 16px;
}

/* Smooth Scroll */
html {
  scroll-behavior: smooth;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

.feature-card,
.pricing-card {
  animation: fadeInUp 0.6s ease-out;
}

.hero-image img {
  animation: float 6s ease-in-out infinite;
}

/* Enhanced SaaS-style gradients */
.hero {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 50%, #F1F5F9 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

/* Enhanced feature cards with hover effects */
.feature-card {
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

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

/* Pricing card enhancements - removed duplicate border */

/* Enhanced button styles */
.btn-primary {
  position: relative;
  overflow: hidden;
  color: #FFFFFF !important;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
  width: 300px;
  height: 300px;
}

/* Stats animation */
.stat-number {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Section dividers */
.features::after,
.pricing::after {
  content: '';
  display: block;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin-top: 100px;
}

/* Enhanced form inputs */
.form-group input:focus,
.form-group textarea:focus {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Loading states */
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #FFFFFF;
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 6px rgba(0, 0, 0, 0.1);
  z-index: 10000;
  padding: 24px;
  transform: translateY(100%);
  transition: transform 0.3s ease;
  display: none; /* 默认隐藏，由JavaScript控制显示 */
}

.cookie-banner.show {
  transform: translateY(0);
  display: block !important; /* 显示时强制显示 */
}

.cookie-content {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cookie-text {
  flex: 1;
  min-width: 300px;
}

.cookie-text h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.cookie-text p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.cookie-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.cookie-link {
  color: var(--primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

.cookie-link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.btn-cookie {
  padding: 10px 20px;
  font-size: 14px;
  white-space: nowrap;
}

@media (max-width: 768px) {
  .cookie-content {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .cookie-actions {
    width: 100%;
    justify-content: flex-end;
  }
  
  .btn-cookie {
    flex: 1;
    min-width: 120px;
  }
}

/* Print styles */
@media print {
  .navbar,
  .footer,
  .hero-cta,
  .download-buttons,
  .contact-form,
  .cookie-banner {
    display: none;
  }
  
  .hero,
  .features,
  .pricing,
  .download,
  .contact {
    page-break-inside: avoid;
  }
}