/* ===================================================================
   SSRDog 机场官网 - 现代化技术风格与动效样式表
   Brand: SSRDog 机场官网 | Target URL: https://jichang-go.org/go.php
   =================================================================== */

:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #101623;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(28, 38, 60, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 230, 255, 0.3);
  
  --primary: #00e5ff;
  --primary-rgb: 0, 229, 255;
  --primary-dark: #00a8c6;
  --secondary: #7928ca;
  --accent: #ff007a;
  --accent-green: #00f59b;
  --accent-amber: #ffb800;
  
  --text-primary: #f0f4f8;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(0, 229, 255, 0.25);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Canvas & Mesh Glows */
#canvas-particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.65;
}

.bg-ambient-blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.18;
  animation: pulseBlob 12s infinite alternate ease-in-out;
}

.blob-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
  top: -100px;
  left: -100px;
}

.blob-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--secondary) 0%, transparent 70%);
  bottom: 10%;
  right: -150px;
  animation-delay: -5s;
}

.blob-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  top: 45%;
  left: 40%;
  animation-delay: -8s;
  opacity: 0.1;
}

@keyframes pulseBlob {
  0% { transform: scale(1) translate(0, 0); }
  50% { transform: scale(1.15) translate(30px, -40px); }
  100% { transform: scale(0.9) translate(-20px, 30px); }
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* Typography & Helpers */
a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: #fff;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.text-gradient {
  background: linear-gradient(135deg, #00e5ff 0%, #7928ca 50%, #ff007a 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-cyan {
  background: linear-gradient(135deg, #00e5ff 0%, #00f59b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-center { text-align: center; }
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--primary);
  margin-bottom: 16px;
  backdrop-filter: blur(8px);
}

.badge-pill .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
  animation: dotPulse 1.8s infinite;
}

@keyframes dotPulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

/* Header & Navbar */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 13, 20, 0.82);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #fff;
}

.brand-logo svg {
  width: 34px;
  height: 34px;
  filter: drop-shadow(0 0 8px rgba(0, 229, 255, 0.5));
}

.brand-badge {
  font-size: 0.7rem;
  padding: 2px 7px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-weight: 700;
  margin-left: -4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 0;
  position: relative;
}

.nav-links a:hover, .nav-links a.active {
  color: #fff;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
  box-shadow: 0 0 8px var(--primary);
}

.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #00e5ff 0%, #0099ff 100%);
  color: #03101c;
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4ef0ff 0%, #20b0ff 100%);
  box-shadow: 0 6px 28px rgba(0, 229, 255, 0.55);
  transform: translateY(-2px);
  color: #03101c;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
  border-radius: 12px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
}

/* Reading Progress Bar for Articles */
#reading-progress {
  position: fixed;
  top: 72px;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  z-index: 999;
  box-shadow: 0 0 10px var(--primary);
}

/* Hero Section */
.hero-section {
  padding: 85px 0 60px;
  text-align: center;
  position: relative;
}

.hero-title {
  font-size: clamp(2.3rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  max-width: 1040px;
  margin: 0 auto;
}

.highlight-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 18px 20px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.highlight-box:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

.highlight-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(0, 229, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.highlight-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 2px;
}

.highlight-content p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Sections General */
.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background: rgba(16, 22, 35, 0.5);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
}

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

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: 0 15px 35px -10px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 229, 255, 0.15);
}

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

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(121, 40, 202, 0.15));
  border: 1px solid rgba(0, 229, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 22px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

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

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

.pricing-card.popular {
  border-color: var(--primary);
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.2);
  background: rgba(18, 28, 48, 0.9);
}

.popular-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: linear-gradient(135deg, var(--primary), #0099ff);
  color: #03101c;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pricing-header h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.pricing-header p {
  color: var(--text-muted);
  font-size: 0.88rem;
  min-height: 38px;
}

.pricing-price {
  margin: 24px 0 28px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-price .currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
}

.pricing-price .amount {
  font-size: 3rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}

.pricing-price .period {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.pricing-features li svg {
  color: var(--accent-green);
  flex-shrink: 0;
}

/* User Groups / Personas */
.persona-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.persona-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}

.persona-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--bg-card-hover);
}

.persona-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.persona-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.persona-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Tutorial Tabs Section */
.tutorial-tabs-header {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tab-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.tab-btn.active {
  background: var(--primary);
  color: #03101c;
  border-color: var(--primary);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.4);
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.tutorial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(12px);
}

.tutorial-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.step-item {
  position: relative;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-md);
}

.step-num {
  position: absolute;
  top: -12px;
  left: 20px;
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: #03101c;
  font-weight: 800;
  font-size: 0.85rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
}

.step-item h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin: 8px 0 10px;
}

.step-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Reviews / Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.3);
}

.review-stars {
  color: var(--accent-amber);
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-primary);
  line-height: 1.65;
  margin-bottom: 18px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
}

.review-info h5 {
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.review-info span {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-item:hover {
  border-color: rgba(0, 229, 255, 0.3);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  gap: 16px;
}

.faq-question svg {
  transition: transform 0.3s ease;
  flex-shrink: 0;
  color: var(--primary);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 24px 22px;
}

/* Articles Directory Grid */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  text-decoration: none;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.article-thumb {
  width: 100%;
  height: 190px;
  position: relative;
  overflow: hidden;
  background: #151e30;
  display: flex;
  align-items: center;
  justify-content: center;
}

.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.article-card:hover .article-thumb img {
  transform: scale(1.05);
}

.article-thumb-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(10, 13, 20, 0.85);
  color: var(--primary);
  border: 1px solid rgba(0, 229, 255, 0.3);
  backdrop-filter: blur(6px);
}

.article-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 12px;
  transition: color 0.2s;
}

.article-card:hover .article-title {
  color: var(--primary);
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
}

/* Call to Action Banner */
.cta-banner {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.15) 0%, rgba(121, 40, 202, 0.2) 100%);
  border: 1px solid rgba(0, 229, 255, 0.35);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 50px rgba(0, 229, 255, 0.12);
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
}

.cta-banner p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 650px;
  margin: 0 auto 30px;
}

/* Article Detail Page Layout */
.article-page-header {
  padding: 60px 0 30px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-secondary);
}

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

.article-main-title {
  font-size: clamp(1.8rem, 3.5vw, 2.7rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  color: #fff;
}

.article-info-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  flex-wrap: wrap;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-body h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: #fff;
  margin: 48px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h2::before {
  content: '';
  width: 5px;
  height: 24px;
  background: var(--primary);
  border-radius: 3px;
  display: inline-block;
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 32px 0 14px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 26px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body blockquote {
  background: rgba(0, 229, 255, 0.05);
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: #e2e8f0;
  font-style: italic;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.article-body th, .article-body td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.article-body th {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-weight: 700;
}

.article-body tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.article-body code {
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--primary);
}

.article-body pre {
  background: #0d121d;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 18px;
  overflow-x: auto;
  margin: 24px 0;
}

.article-body pre code {
  background: none;
  padding: 0;
  color: #e2e8f0;
}

.article-figure {
  margin: 30px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.article-figure figcaption {
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--bg-card);
  text-align: center;
}

/* In-Article Action Box */
.article-cta-box {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.1), rgba(121, 40, 202, 0.15));
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 40px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.article-cta-box h4 {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
}

.article-cta-box p {
  margin-bottom: 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* Sidebar */
.article-sidebar {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  backdrop-filter: blur(10px);
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  font-size: 0.88rem;
}

.toc-list li {
  margin-bottom: 10px;
}

.toc-list a {
  color: var(--text-secondary);
  display: block;
  padding-left: 8px;
  border-left: 2px solid transparent;
}

.toc-list a:hover {
  color: var(--primary);
  border-left-color: var(--primary);
}

.related-articles-list {
  list-style: none;
}

.related-articles-list li {
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.related-articles-list li:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.related-articles-list a {
  color: #e2e8f0;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.45;
  display: block;
  margin-bottom: 4px;
}

.related-articles-list a:hover {
  color: var(--primary);
}

.related-articles-list span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  background: #07090e;
  border-top: 1px solid var(--border-color);
  padding: 70px 0 30px;
  margin-top: 80px;
  position: relative;
  z-index: 2;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 16px 0 20px;
  max-width: 340px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}

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

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  color: var(--text-muted);
}

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

/* Responsive */
@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: #0d121c;
    flex-direction: column;
    padding: 30px;
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 999;
  }
  .nav-links.active {
    transform: translateY(0);
  }
  .mobile-toggle {
    display: block;
  }
  .nav-actions {
    display: none;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .tutorial-card {
    padding: 24px;
  }
}