/* 仙路湾 (XianLuWan) Modern Bento Grid Design System & GEO Styles */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #94a3b8;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #e0e7ff;
  --accent-pink: #ec4899;
  --accent-purple: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 20px 35px -10px rgba(99, 102, 241, 0.12), 0 10px 15px -5px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 0 25px rgba(236, 72, 153, 0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  background-color: var(--bg-main);
  background-image: radial-gradient(#cbd5e1 1.2px, transparent 1.2px);
  background-size: 28px 28px;
  overflow-x: hidden;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation Bar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  padding: 16px 0;
  transition: var(--transition);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--text-main);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.3);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.btn-glow {
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(236, 72, 153, 0.35);
}

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

.btn-outline {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-emerald);
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--text-main);
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #4f46e5 0%, #ec4899 50%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 36px;
  font-weight: 400;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-metrics {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px dashed var(--border-color);
}

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

.metric-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
}

.metric-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* GEO AI Summary Box (Generative Engine Optimization) */
.geo-ai-summary {
  background: linear-gradient(135deg, #f0f9ff 0%, #f5f3ff 100%);
  border: 1px solid #c7d2fe;
  border-left: 5px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 24px 0 32px;
  box-shadow: var(--shadow-sm);
}

.geo-ai-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 800;
  color: #3730a3;
  margin-bottom: 12px;
}

.geo-ai-tag {
  background: #e0e7ff;
  color: #4338ca;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.geo-ai-list {
  margin: 0 0 0 20px !important;
  color: #334155 !important;
  font-size: 0.975rem !important;
  line-height: 1.7 !important;
}

.geo-ai-list li {
  margin-bottom: 6px;
}

/* Live Pulse Animation */
.live-pulse-dot {
  width: 7px;
  height: 7px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulseDot 1.6s infinite;
}

@keyframes pulseDot {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

/* Bento Grid Architecture */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 12px auto 0;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
  margin-bottom: 80px;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.bento-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg);
}

.col-12 { grid-column: span 12; }
.col-8 { grid-column: span 8; }
.col-7 { grid-column: span 7; }
.col-6 { grid-column: span 6; }
.col-5 { grid-column: span 5; }
.col-4 { grid-column: span 4; }

.bento-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--bg-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  border: 1px solid var(--border-color);
}

.bento-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}

.bento-text {
  font-size: 0.975rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.bento-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.tag-pill {
  font-size: 0.775rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: #f1f5f9;
  color: var(--text-muted);
}

.tag-pill.pink { background: #fce7f3; color: #be185d; }
.tag-pill.purple { background: #f3e8ff; color: #6b21a8; }
.tag-pill.cyan { background: #e0f2fe; color: #0369a1; }
.tag-pill.green { background: #dcfce7; color: #15803d; }

/* Pricing Section & Interactive Switcher */
.pricing-section {
  padding: 80px 0;
  background: rgba(255, 255, 255, 0.6);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.pricing-switcher {
  display: flex;
  justify-content: center;
  margin-bottom: 40px;
}

.switcher-bg {
  background: #e2e8f0;
  padding: 4px;
  border-radius: var(--radius-full);
  display: inline-flex;
  gap: 4px;
}

.switcher-btn {
  padding: 10px 24px;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.switcher-btn.active {
  background: #ffffff;
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card.popular {
  border: 2px solid var(--accent-pink);
  transform: scale(1.03);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.plan-traffic {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.plan-price {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 4px;
}

.plan-price span {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin: 24px 0 32px;
  flex-grow: 1;
}

.plan-features li {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.plan-features li::before {
  content: "✓";
  color: var(--accent-emerald);
  font-weight: bold;
}

/* Audiences Section */
.audiences-section {
  padding: 80px 0;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.audience-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

/* Articles Hub Section */
.articles-section {
  padding: 80px 0;
  background: rgba(241, 245, 249, 0.5);
  border-top: 1px solid var(--border-color);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-purple);
  box-shadow: var(--shadow-md);
}

.article-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}

.article-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.5;
}

.article-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

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

.faq-container {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
}

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

/* Footer Architecture */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 80px 0 30px;
  border-top: 1px solid #1e293b;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

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

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

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid #1e293b;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* Article Detail Pages Specific */
.article-page {
  padding: 60px 0;
}

.article-header {
  max-width: 860px;
  margin: 0 auto 40px;
}

.article-breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.article-breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.article-main-title {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  gap: 20px;
  font-size: 0.875rem;
  color: var(--text-light);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.article-content {
  max-width: 860px;
  margin: 0 auto;
  background: #ffffff;
  padding: 48px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.article-content h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin: 36px 0 18px;
  color: var(--text-main);
  border-left: 4px solid var(--primary);
  padding-left: 14px;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 28px 0 14px;
  color: var(--text-main);
}

.article-content p {
  font-size: 1.05rem;
  color: #334155;
  line-height: 1.8;
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 24px;
  font-size: 1.025rem;
  color: #334155;
  line-height: 1.8;
}

.article-content code {
  background: #f1f5f9;
  color: #0f172a;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.9em;
}

.article-content pre {
  background: #0f172a;
  color: #f8fafc;
  padding: 20px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 24px;
  font-family: monospace;
  font-size: 0.9rem;
  line-height: 1.6;
}

.checklist-box {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 28px 0;
}

.checklist-box h4 {
  color: #065f46;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-banner {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  margin: 48px 0;
}

.cta-banner h3 {
  color: #ffffff !important;
  font-size: 1.8rem;
  margin-bottom: 12px !important;
  border: none !important;
  padding: 0 !important;
}

@media (max-width: 1024px) {
  .hero-title { font-size: 2.5rem; }
  .bento-grid { grid-template-columns: 1fr; }
  .col-8, .col-7, .col-6, .col-5, .col-4 { grid-column: span 1; }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .audience-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .hero-title { font-size: 2rem; }
  .pricing-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero-metrics { flex-direction: column; gap: 20px; }
  .article-content { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
}