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

:root {
  /* Color Palette - 參考您app的顏色主題 */
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #a5b4fc;
  --secondary-color: #f8fafc;
  --accent-color: #10b981;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --background: #ffffff;
  --background-light: #f9fafb;
  --border-color: #e5e7eb;
  --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1),
    0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --border-radius: 12px;
  --border-radius-large: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI',
    Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--background);
  scroll-behavior: smooth;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

/* Header Styles */
.header {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-dark) 100%
  );
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-medium);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: white;
  font-size: 1.25rem;
  font-weight: 600;
}

.logo i {
  font-size: 1.5rem;
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

/* Hero Section */
.hero {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-dark) 100%
  );
  padding: 4rem 2rem;
  color: white;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.05)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.05)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.03)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.03)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: linear-gradient(45deg, #ffffff, #e0e7ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  font-weight: 400;
}

.last-updated {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-large);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-decoration {
  position: absolute;
  top: 50%;
  right: 2rem;
  transform: translateY(-50%);
}

.floating-icon {
  font-size: 8rem;
  opacity: 0.1;
  animation: float 6s ease-in-out infinite;
}

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

/* Main Content */
.main-content {
  padding: 4rem 2rem;
}

.section {
  margin-bottom: 4rem;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease-out forwards;
}

.section:nth-child(even) {
  animation-delay: 0.2s;
}

.section:nth-child(odd) {
  animation-delay: 0.1s;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.section-number {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--primary-dark)
  );
  color: white;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  box-shadow: var(--shadow-medium);
}

.section-title {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.section-content {
  margin-left: 4.5rem;
}

.section-content p {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Info Grid */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.info-card {
  background: var(--background);
  padding: 2rem;
  border-radius: var(--border-radius-large);
  box-shadow: var(--shadow-light);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.info-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.info-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-large);
}

.info-icon {
  width: 3rem;
  height: 3rem;
  background: linear-gradient(
    135deg,
    var(--primary-light),
    var(--primary-color)
  );
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.info-icon i {
  font-size: 1.25rem;
  color: white;
}

.info-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.info-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin: 0;
}

/* Usage List */
.usage-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}

.usage-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--background-light);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--primary-color);
  transition: var(--transition);
}

.usage-item:hover {
  background: white;
  box-shadow: var(--shadow-light);
  transform: translateX(5px);
}

.usage-icon {
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--primary-dark)
  );
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.usage-icon i {
  color: white;
  font-size: 1rem;
}

.usage-item span {
  font-size: 1.125rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* Security Features */
.security-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.security-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: linear-gradient(135deg, var(--background-light), white);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.security-item:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-2px);
}

.security-item i {
  font-size: 1.5rem;
  color: var(--accent-color);
  flex-shrink: 0;
}

.security-item span {
  color: var(--text-primary);
  font-weight: 500;
}

/* Additional Sections */
.additional-sections {
  margin: 4rem 0;
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.mini-section {
  background: var(--background);
  padding: 2rem;
  border-radius: var(--border-radius-large);
  box-shadow: var(--shadow-light);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.mini-section:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-3px);
}

.mini-section h3 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.mini-section h3 i {
  color: var(--primary-color);
  font-size: 1.125rem;
}

.mini-section p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* Contact Section */
.contact-section {
  background: linear-gradient(135deg, var(--background-light), white);
  padding: 3rem;
  border-radius: var(--border-radius-large);
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
}

.contact-info {
  margin: 2rem 0;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

.contact-item:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-2px);
}

.contact-item i {
  font-size: 1.25rem;
  color: var(--primary-color);
}

.contact-item a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  font-size: 1.125rem;
}

.contact-item a:hover {
  text-decoration: underline;
}

.contact-note {
  font-style: italic;
  color: var(--text-light);
  margin-top: 1rem;
}

/* Footer */
.footer {
  background: var(--background-light);
  padding: 3rem 2rem;
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
}

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

.footer-content p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.footer-links {
  color: var(--text-light);
  font-size: 0.875rem;
}

/* Scroll to Top Button */
.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--primary-dark)
  );
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-large);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  z-index: 1000;
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 25px -5px rgba(0, 0, 0, 0.2);
}

.scroll-to-top i {
  font-size: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    padding: 0 1rem;
    flex-direction: column;
    gap: 1rem;
  }

  .nav {
    gap: 1rem;
  }

  .nav-link {
    padding: 0.5rem;
    font-size: 0.875rem;
  }

  .hero {
    padding: 3rem 1rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

  .hero-decoration {
    display: none;
  }

  .main-content {
    padding: 2rem 1rem;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .section-content {
    margin-left: 0;
  }

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

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

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

  .contact-section {
    padding: 2rem 1rem;
  }

  .footer {
    padding: 2rem 1rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .section-content p {
    font-size: 1rem;
  }

  .info-card,
  .mini-section {
    padding: 1.5rem;
  }

  .usage-item {
    padding: 1rem;
  }

  .last-updated {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }
}

/* App-specific styles */
.app-hero {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-dark) 100%
  );
  padding: 6rem 2rem;
  color: white;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.app-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.05)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.3;
}

.app-hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
}

.app-title {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: linear-gradient(45deg, #ffffff, #e0e7ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.app-subtitle {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  font-weight: 400;
}

.app-badges {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.app-badge {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius-large);
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.app-badge:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background: var(--background);
  padding: 2.5rem;
  border-radius: var(--border-radius-large);
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-large);
}

.feature-icon {
  width: 4rem;
  height: 4rem;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--accent-color)
  );
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.feature-icon i {
  font-size: 1.5rem;
  color: white;
}

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

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

.screenshots-section {
  background: var(--background-light);
  padding: 4rem 2rem;
  margin: 4rem 0;
}

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.screenshot-card {
  background: white;
  padding: 1rem;
  border-radius: var(--border-radius-large);
  box-shadow: var(--shadow-medium);
  transition: var(--transition);
}

.screenshot-card:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-large);
}

.screenshot-placeholder {
  width: 100%;
  height: 400px;
  background: linear-gradient(
    135deg,
    var(--background-light),
    var(--border-color)
  );
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.screenshot-title {
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
}

.cta-section {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--primary-dark)
  );
  color: white;
  padding: 4rem 2rem;
  text-align: center;
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.cta-subtitle {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.cta-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: white;
  color: var(--primary-color);
  text-decoration: none;
  border-radius: var(--border-radius-large);
  font-weight: 600;
  font-size: 1.125rem;
  transition: var(--transition);
  box-shadow: var(--shadow-medium);
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-large);
}

.nav-pills {
  display: flex;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  padding: 0.5rem;
  border-radius: var(--border-radius-large);
  backdrop-filter: blur(10px);
}

.nav-pill {
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  color: white;
  text-decoration: none;
  transition: var(--transition);
  font-weight: 500;
}

.nav-pill.active {
  background: rgba(255, 255, 255, 0.2);
}

.nav-pill:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Print Styles */
@media print {
  .header,
  .scroll-to-top {
    display: none;
  }

  .hero,
  .app-hero {
    background: none;
    color: var(--text-primary);
    padding: 2rem 0;
  }

  .hero-title,
  .app-title {
    color: var(--text-primary);
    -webkit-text-fill-color: var(--text-primary);
  }

  .section {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .info-card,
  .mini-section,
  .feature-card {
    break-inside: avoid;
    page-break-inside: avoid;
  }
}