/* CSS Variables */
:root {
  --color-primary: #D54A80;
  --color-action: #B83268;
  --color-action-hover: #982653;
  --color-header: #2D2D2D;
  --color-dark-surface: #252525;
  --color-bg: #FFFFFF;
  --color-bg-alt: #FAFAFA;
  --color-text: #151515;
  --color-muted: #666666;
  --color-border: #E8E8E8;
  --color-tint: #FFF1F6;
  --font-primary: 'Roboto', system-ui, sans-serif;
  --font-secondary: 'Noto Sans SC', system-ui, sans-serif;
  --border-radius: 12px;
  --transition: 0.3s ease;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --container-max: 1200px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-secondary);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  background-color: var(--color-header);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #FFFFFF;
}

.logo-icon {
  width: 32px;
  height: 32px;
}

.brand-name {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 20px;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #FFFFFF;
  font-size: 24px;
  cursor: pointer;
  padding: 8px;
}

.main-nav .nav-list {
  display: flex;
  list-style: none;
  gap: 8px;
  align-items: center;
}

.main-nav .nav-list a {
  color: #FFFFFF;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 8px;
  transition: background-color var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
}

.main-nav .nav-list a:hover,
.main-nav .nav-list a:focus {
  background-color: rgba(255,255,255,0.1);
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.nav-cta .btn-nav {
  background-color: var(--color-action);
  color: #FFFFFF;
  font-weight: 500;
  padding: 10px 20px;
}

.nav-cta .btn-nav:hover,
.nav-cta .btn-nav:focus {
  background-color: var(--color-action-hover);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-tint) 0%, #FFFFFF 100%);
  padding: 80px 0;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-subtitle {
  color: var(--color-primary);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 14px;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: 48px;
  line-height: 1.2;
  margin-bottom: 20px;
  font-family: var(--font-primary);
  font-weight: 700;
}

.hero-description {
  font-size: 18px;
  color: var(--color-muted);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.btn-primary {
  background-color: var(--color-action);
  color: #FFFFFF;
  padding: 14px 32px;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 500;
  display: inline-block;
  transition: all var(--transition);
  font-size: 16px;
  border: 2px solid var(--color-action);
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--color-action-hover);
  border-color: var(--color-action-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  outline: none;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-action);
  padding: 14px 32px;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 500;
  display: inline-block;
  border: 2px solid var(--color-action);
  transition: all var(--transition);
  font-size: 16px;
}

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: var(--color-action);
  color: #FFFFFF;
  outline: none;
}

.hero-tips {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tip-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-muted);
  font-size: 15px;
}

.tip-item i {
  color: var(--color-primary);
  font-size: 18px;
}

.hero-visual {
  position: relative;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual i {
  position: absolute;
  color: var(--color-primary);
  opacity: 0.2;
}

.icon-large { font-size: 180px; z-index: 1; }
.icon-medium { font-size: 100px; top: 50px; right: 80px; z-index: 2; }
.icon-small { font-size: 60px; bottom: 80px; left: 60px; z-index: 2; }

.shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.1;
}

.shape-1 {
  width: 200px;
  height: 200px;
  background-color: var(--color-primary);
  top: 20px;
  left: 20px;
}

.shape-2 {
  width: 150px;
  height: 150px;
  background-color: var(--color-action);
  bottom: 40px;
  right: 40px;
}

.shape-3 {
  width: 100px;
  height: 100px;
  background-color: var(--color-primary);
  top: 150px;
  right: 150px;
}

/* Platform Introduction */
.platform-intro {
  padding: 80px 0;
  text-align: center;
}

.platform-intro h2 {
  font-size: 36px;
  margin-bottom: 24px;
  font-family: var(--font-primary);
  font-weight: 700;
}

.platform-intro p {
  font-size: 18px;
  color: var(--color-muted);
  max-width: 800px;
  margin: 0 auto 20px;
}

/* Browse Methods */
.browse-methods {
  background-color: var(--color-bg-alt);
  padding: 80px 0;
}

.browse-methods h2 {
  font-size: 36px;
  margin-bottom: 48px;
  text-align: center;
  font-family: var(--font-primary);
  font-weight: 700;
}

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

.info-card {
  background: #FFFFFF;
  padding: 32px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  text-align: center;
  border: 1px solid var(--color-border);
}

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

.card-icon {
  font-size: 48px;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.info-card h3 {
  font-size: 20px;
  margin-bottom: 16px;
  font-family: var(--font-primary);
  font-weight: 600;
}

.info-card p {
  color: var(--color-muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

.card-link {
  color: var(--color-action);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
  display: inline-block;
}

.card-link:hover,
.card-link:focus {
  color: var(--color-action-hover);
  text-decoration: underline;
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

/* Categories */
.categories {
  padding: 80px 0;
}

.categories h2 {
  font-size: 36px;
  margin-bottom: 32px;
  text-align: center;
  font-family: var(--font-primary);
  font-weight: 700;
}

.filter-buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  background-color: #FFFFFF;
  color: var(--color-text);
  border: 2px solid var(--color-border);
  padding: 10px 24px;
  border-radius: 24px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition);
  font-family: var(--font-secondary);
}

.filter-btn:hover,
.filter-btn:focus {
  border-color: var(--color-primary);
  outline: none;
}

.filter-btn.active {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

.category-card {
  background: #FFFFFF;
  padding: 32px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.category-card.hidden {
  display: none;
}

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

.category-card h3 {
  font-size: 22px;
  margin-bottom: 16px;
  font-family: var(--font-primary);
  font-weight: 600;
}

.category-card p {
  color: var(--color-muted);
  margin-bottom: 20px;
}

/* Steps */
.steps {
  background-color: var(--color-bg-alt);
  padding: 80px 0;
}

.steps h2 {
  font-size: 36px;
  margin-bottom: 48px;
  text-align: center;
  font-family: var(--font-primary);
  font-weight: 700;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  margin-bottom: 48px;
}

.step-item {
  text-align: center;
}

.step-number {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--color-action), var(--color-action-hover));
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  margin: 0 auto 20px;
}

.step-item h3 {
  font-size: 22px;
  margin-bottom: 12px;
  font-family: var(--font-primary);
  font-weight: 600;
}

.step-item p {
  color: var(--color-muted);
}

.steps-cta {
  text-align: center;
}

/* Features */
.features {
  padding: 80px 0;
}

.features h2 {
  font-size: 36px;
  margin-bottom: 48px;
  text-align: center;
  font-family: var(--font-primary);
  font-weight: 700;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}

.feature-item {
  text-align: center;
}

.feature-icon {
  font-size: 56px;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.feature-item h3 {
  font-size: 20px;
  margin-bottom: 12px;
  font-family: var(--font-primary);
  font-weight: 600;
}

.feature-item p {
  color: var(--color-muted);
}

/* Testimonials */
.testimonials {
  background-color: var(--color-bg-alt);
  padding: 80px 0;
}

.testimonials h2 {
  font-size: 36px;
  margin-bottom: 48px;
  text-align: center;
  font-family: var(--font-primary);
  font-weight: 700;
}

.rating-summary {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  margin-bottom: 48px;
  background: #FFFFFF;
  padding: 32px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

.rating-score {
  text-align: center;
}

.stars-display {
  font-size: 32px;
  color: var(--color-border);
  margin-bottom: 16px;
}

.rating-text {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
}

.review-count {
  color: var(--color-muted);
  font-size: 14px;
}

.rating-breakdown {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rating-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}

.bar-label {
  width: 50px;
  color: var(--color-muted);
}

.bar-container {
  flex: 1;
  height: 8px;
  background-color: var(--color-bg-alt);
  border-radius: 4px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background-color: var(--color-primary);
  transition: width var(--transition);
}

.bar-count {
  width: 30px;
  text-align: right;
  color: var(--color-muted);
}

.breakdown-note {
  margin-top: 12px;
  font-size: 13px;
  color: var(--color-muted);
  font-style: italic;
}

.testimonials-carousel {
  position: relative;
  margin-bottom: 24px;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-color: #FFFFFF;
  border: 2px solid var(--color-border);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all var(--transition);
  color: var(--color-text);
  font-size: 18px;
}

.carousel-btn:hover,
.carousel-btn:focus {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
  outline: none;
}

.carousel-btn.prev { left: -22px; }
.carousel-btn.next { right: -22px; }

.carousel-container {
  overflow: hidden;
  border-radius: var(--border-radius);
}

.carousel-track {
  display: flex;
  transition: transform var(--transition);
}

.testimonial-card {
  min-width: 100%;
  background: #FFFFFF;
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.demo-badge {
  background-color: var(--color-tint);
  color: var(--color-action);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  display: inline-block;
  margin-bottom: 16px;
}

.testimonial-card h4 {
  font-size: 20px;
  margin-bottom: 12px;
  font-family: var(--font-primary);
  font-weight: 600;
}

.testimonial-card p {
  color: var(--color-muted);
  line-height: 1.6;
}

.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
}

.indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-border);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}

.indicator:hover,
.indicator:focus {
  background-color: var(--color-primary);
  transform: scale(1.2);
  outline: none;
}

.indicator.active {
  background-color: var(--color-primary);
  width: 32px;
  border-radius: 6px;
}

.experience-highlights h3 {
  font-size: 24px;
  margin-bottom: 24px;
  text-align: center;
  font-family: var(--font-primary);
  font-weight: 600;
}

.highlights-grid {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.highlight-tag {
  background-color: #FFFFFF;
  color: var(--color-text);
  padding: 10px 24px;
  border-radius: 24px;
  font-weight: 500;
  border: 2px solid var(--color-primary);
}

/* FAQ */
.faq {
  padding: 80px 0;
}

.faq h2 {
  font-size: 36px;
  margin-bottom: 48px;
  text-align: center;
  font-family: var(--font-primary);
  font-weight: 700;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #FFFFFF;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: all var(--transition);
}

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

.faq-item summary {
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 18px;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background-color var(--transition);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 24px;
  color: var(--color-primary);
  font-weight: 700;
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary:hover,
.faq-item summary:focus {
  background-color: var(--color-bg-alt);
  outline: none;
}

.faq-item p {
  padding: 0 24px 20px;
  color: var(--color-muted);
  line-height: 1.7;
}

.inline-link {
  color: var(--color-action);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

.inline-link:hover,
.inline-link:focus {
  color: var(--color-action-hover);
  text-decoration: underline;
}

/* Final CTA */
.final-cta {
  background: linear-gradient(135deg, var(--color-action), var(--color-action-hover));
  color: #FFFFFF;
  padding: 80px 0;
  text-align: center;
}

.final-cta h2 {
  font-size: 42px;
  margin-bottom: 16px;
  font-family: var(--font-primary);
  font-weight: 700;
}

.cta-subtitle {
  font-size: 20px;
  margin-bottom: 32px;
  opacity: 0.95;
}

.btn-cta-large {
  background-color: #FFFFFF;
  color: var(--color-action);
  padding: 16px 48px;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
  display: inline-block;
  transition: all var(--transition);
  border: 2px solid #FFFFFF;
}

.btn-cta-large:hover,
.btn-cta-large:focus {
  background-color: transparent;
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  outline: none;
}

.cta-note {
  margin-top: 24px;
  font-size: 14px;
  opacity: 0.85;
}

/* Footer */
.site-footer {
  background-color: var(--color-header);
  color: #FFFFFF;
  padding: 48px 0 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
  margin-bottom: 24px;
}

.footer-logo {
  width: 32px;
  height: 32px;
}

.footer-links-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer-section-title {
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 8px;
  text-align: center;
}

.footer-nav a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--transition);
}

.footer-nav a:hover,
.footer-nav a:focus {
  color: #FFFFFF;
  text-decoration: underline;
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

.copyright {
  text-align: center;
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 12px;
}

.legal-note {
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background-color: var(--color-action);
  color: #FFFFFF;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 999;
}

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

.back-to-top:hover,
.back-to-top:focus {
  background-color: var(--color-action-hover);
  transform: translateY(-4px);
  outline: none;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero h1 { font-size: 40px; }
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { height: 300px; }
  .rating-summary { grid-template-columns: 1fr; gap: 32px; }
  .carousel-btn.prev { left: 10px; }
  .carousel-btn.next { right: 10px; }
}

@media (max-width: 768px) {
  .mobile-menu-toggle { display: block; }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-dark-surface);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }

  .main-nav.active {
    max-height: 400px;
    box-shadow: var(--shadow-md);
  }

  .main-nav .nav-list {
    flex-direction: column;
    padding: 16px 0;
    gap: 0;
  }

  .main-nav .nav-list li {
    width: 100%;
  }

  .main-nav .nav-list a {
    display: block;
    padding: 12px 24px;
    border-radius: 0;
  }

  .footer-links-container {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero { padding: 60px 0; }
  .hero h1 { font-size: 32px; }
  .hero-description { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .hero-actions a { width: 100%; text-align: center; }
  
  h2 { font-size: 28px !important; }
  .platform-intro, .browse-methods, .categories, .steps, .features, .testimonials, .faq { padding: 60px 0; }
  
  .cards-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  
  .final-cta h2 { font-size: 32px; }
  .cta-subtitle { font-size: 18px; }
}

@media (max-width: 360px) {
  .container { padding: 0 16px; }
  body { font-size: 15px; }
  .hero h1 { font-size: 28px; }
  .btn-primary, .btn-secondary, .btn-cta-large { padding: 12px 24px; font-size: 15px; }
  .info-card, .category-card { padding: 24px; }
  .back-to-top { bottom: 20px; right: 20px; width: 44px; height: 44px; }
}