/* ==========================================================================
   一支红杏机场 - 现代植物标本室：粉杏压花与透明冷玻片 (Botanical Specimen & Pressed Apricot)
   Domain: iyizhihongxing.homes
   Design System & Master Stylesheet
   ========================================================================== */

:root {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F3EFEA;
  --bg-tertiary: #F8FAFC;
  --bg-glass-card: rgba(255, 255, 255, 0.75);
  --bg-glass-card-hover: rgba(255, 255, 255, 0.92);
  
  --accent-pink: #FB7185;
  --accent-pink-dark: #F43F5E;
  --accent-pink-light: rgba(251, 113, 133, 0.08);
  --accent-pink-glow: rgba(251, 113, 133, 0.25);
  
  --sage-green: #E2E8F0;
  --specimen-amber: #EAB308;
  
  --glass-border: rgba(251, 113, 133, 0.18);
  --glass-border-focus: rgba(244, 63, 94, 0.4);
  --glass-shadow: 0 10px 30px -5px rgba(226, 210, 205, 0.25), 0 0 1px 1px rgba(255, 255, 255, 0.8) inset;
  --glass-shadow-hover: 0 20px 40px -10px rgba(244, 63, 94, 0.18), 0 0 2px 1px rgba(251, 113, 133, 0.3) inset;
  
  --text-main: #1E293B;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Consolas, Monaco, monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  background: radial-gradient(circle at 10% 20%, rgba(251, 113, 133, 0.03) 0%, transparent 40%),
              radial-gradient(circle at 90% 80%, rgba(243, 239, 234, 0.8) 0%, transparent 50%),
              var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Canvas Particle Backdrop */
#petal-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

a {
  color: var(--accent-pink-dark);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-pink);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0.9rem 1.5rem;
  transition: all var(--transition-normal);
}

.header-container {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #FFF0F3 0%, #FFE4E8 100%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-pink-dark);
  box-shadow: 0 4px 12px rgba(251, 113, 133, 0.15);
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 5rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-pink-dark);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-pink);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Button Component */
.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--accent-pink) 0%, var(--accent-pink-dark) 100%);
  color: #FFFFFF !important;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 16px rgba(244, 63, 94, 0.35);
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-cta::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transform: rotate(30deg) translateY(-100%);
  transition: transform 0.6s ease;
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(244, 63, 94, 0.45);
}

.btn-cta:hover::after {
  transform: rotate(30deg) translateY(100%);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--bg-glass-card);
  color: var(--text-main) !important;
  border: 1px solid var(--glass-border);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.btn-secondary:hover {
  border-color: var(--accent-pink);
  background: #FFFFFF;
  color: var(--accent-pink-dark) !important;
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-main);
  cursor: pointer;
}

/* Glass Specimen Card */
.specimen-card {
  background: var(--bg-glass-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.specimen-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-pink), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.specimen-card:hover {
  background: var(--bg-glass-card-hover);
  border-color: var(--accent-pink-glow);
  box-shadow: var(--glass-shadow-hover);
  transform: translateY(-4px);
}

.specimen-card:hover::before {
  opacity: 1;
}

/* Technical Monospace Tags */
.specimen-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-pink-dark);
  background: var(--accent-pink-light);
  border: 1px solid rgba(251, 113, 133, 0.25);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
}

.specimen-tag-green {
  color: #059669;
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.2);
}

.specimen-tag-blue {
  color: #0284C7;
  background: rgba(14, 165, 233, 0.08);
  border-color: rgba(14, 165, 233, 0.2);
}

/* Main Layout & Sections */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-pink-dark);
  background: var(--accent-pink-light);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(251, 113, 133, 0.3);
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 1rem;
  line-height: 1.25;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Hero Section */
.hero-section {
  padding: 4.5rem 0 5.5rem 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content h1 {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 1.25rem;
}

.hero-content h1 span.gradient-text {
  background: linear-gradient(135deg, var(--accent-pink-dark) 0%, #E11D48 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.75;
}

.hero-feature-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.25rem;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
}

.hero-image-box {
  background: var(--bg-glass-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--glass-shadow);
  position: relative;
}

.hero-image-box img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  display: block;
}

.floating-specimen-badge {
  position: absolute;
  bottom: -20px;
  left: -20px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  background-color: #10B981;
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-ring 1.8s infinite;
}

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-pink-light);
  border: 1px solid rgba(251, 113, 133, 0.3);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--accent-pink-dark);
  margin-bottom: 1.25rem;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.6rem;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.pricing-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.pricing-card.popular {
  border-color: var(--accent-pink);
  background: linear-gradient(180deg, rgba(255, 240, 243, 0.7) 0%, rgba(255, 255, 255, 0.9) 100%);
  box-shadow: 0 16px 36px rgba(251, 113, 133, 0.2);
}

.popular-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--accent-pink-dark);
  color: #FFFFFF;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-pill);
}

.pricing-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.pricing-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.pricing-price {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent-pink-dark);
  margin-bottom: 1.5rem;
}

.pricing-price span {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  font-size: 0.9rem;
  color: var(--text-main);
  padding: 0.45rem 0;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.06);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pricing-features li i {
  color: var(--accent-pink-dark);
  font-size: 0.85rem;
}

/* Node Speed Matrix Analyzer Widget */
.node-widget-card {
  background: #0F172A;
  color: #F8FAFC;
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.3);
  font-family: var(--font-mono);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.widget-title {
  font-size: 1rem;
  color: var(--accent-pink);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.node-table {
  width: 100%;
  border-collapse: collapse;
}

.node-table th {
  text-align: left;
  font-size: 0.78rem;
  color: #94A3B8;
  padding: 0.6rem 0.5rem;
  text-transform: uppercase;
}

.node-table td {
  padding: 0.85rem 0.5rem;
  font-size: 0.88rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.ping-badge {
  color: #10B981;
  font-weight: 600;
}

/* FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.faq-item {
  background: var(--bg-glass-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-question {
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-question:hover {
  color: var(--accent-pink-dark);
}

.faq-toggle-icon {
  font-size: 1.2rem;
  color: var(--accent-pink);
  transition: transform var(--transition-fast);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 1.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.active {
  border-color: var(--accent-pink-glow);
  background: #FFFFFF;
  box-shadow: var(--glass-shadow);
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-item.active .faq-answer {
  max-height: 350px;
  padding: 0 1.5rem 1.4rem 1.5rem;
}

/* Article Cards Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.article-card {
  display: flex;
  flex-direction: column;
}

.article-card-header {
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.65rem;
  line-height: 1.4;
}

.article-title a {
  color: var(--text-main);
}

.article-title a:hover {
  color: var(--accent-pink-dark);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px dashed rgba(0, 0, 0, 0.08);
  padding-top: 0.85rem;
}

/* Tutorial Detail & Article Detail Layout */
.article-detail-page {
  padding: 3.5rem 0 6rem 0;
}

.article-detail-container {
  max-width: 900px;
  margin: 0 auto;
}

.article-detail-header {
  margin-bottom: 2.5rem;
}

.article-detail-title {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.article-content {
  font-size: 1.05rem;
  color: #334155;
  line-height: 1.85;
}

.article-content h2 {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 2.25rem 0 1rem 0;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--accent-pink-light);
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 1.75rem 0 0.75rem 0;
}

.article-content p {
  margin-bottom: 1.4rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.4rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.callout-box {
  background: var(--accent-pink-light);
  border-left: 4px solid var(--accent-pink-dark);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-sm);
  margin: 1.75rem 0;
}

.callout-box p {
  margin-bottom: 0;
  color: var(--text-main);
  font-weight: 5rem;
}

.article-cta-box {
  background: linear-gradient(135deg, #FFF0F3 0%, #FFE4E8 100%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  text-align: center;
  margin: 3rem 0;
  box-shadow: var(--glass-shadow);
}

.article-cta-box h3 {
  font-size: 1.5rem;
  color: var(--text-main);
  margin-bottom: 0.65rem;
}

.article-cta-box p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Footer */
.site-footer {
  background: #0F172A;
  color: #94A3B8;
  padding: 4.5rem 0 2.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.92rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand h3 {
  color: #FFFFFF;
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

.footer-brand p {
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  color: #94A3B8;
}

.footer-links a:hover {
  color: var(--accent-pink);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 2.25rem; }
  .article-detail-title { font-size: 1.75rem; }
}