:root {
  --primary: #6200EE;
  --primary-hover: #5000ca;
  --primary-light: #7c4dff;
  --primary-gradient: linear-gradient(135deg, #6200EE 0%, #7C4DFF 100%);
  --accent: #00d2b4;
  --accent-hover: #00b89e;
  --accent-glow: rgba(0, 210, 180, 0.35);
  --bg-main: #f8f9fe;
  --bg-card: #ffffff;
  --text-main: #1f2430;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-color: #e2e8f0;
  --border-focus: #6200EE;
  --card-radius: 18px;
  --card-shadow: 0 10px 25px -5px rgba(98, 0, 238, 0.07), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --card-shadow-hover: 0 20px 35px -10px rgba(98, 0, 238, 0.16), 0 10px 15px -5px rgba(0, 210, 180, 0.12);
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "Fira Code", Consolas, Monaco, "Courier New", monospace;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* Material Header Bar */
.material-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(98, 0, 238, 0.25);
  transition: var(--transition);
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #ffffff;
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.5px;
}

.nav-brand-icon {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

.nav-link {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  padding: 8px 16px;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 8px;
  transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
}

.nav-cta-btn {
  background: var(--accent);
  color: #0b2e27;
  padding: 10px 22px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 15px rgba(0, 210, 180, 0.4);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.nav-cta-btn:hover {
  background: #00f2fe;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.5);
  color: #05221b;
}

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

/* Hero Section */
.hero {
  position: relative;
  padding: 80px 24px 60px;
  max-width: 1240px;
  margin: 0 auto;
  text-align: center;
}

.hero-ambient-glow {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(circle, rgba(124, 77, 255, 0.18) 0%, rgba(0, 210, 180, 0.1) 60%, transparent 80%);
  filter: blur(60px);
  z-index: -1;
  pointer-events: none;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 30px;
  background: rgba(98, 0, 238, 0.08);
  border: 1px solid rgba(98, 0, 238, 0.18);
  color: var(--primary);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-pill-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 210, 180, 0.7); }
  70% { transform: scale(1.15); box-shadow: 0 0 0 8px rgba(0, 210, 180, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 210, 180, 0); }
}

.hero-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.25;
  color: #111827;
  letter-spacing: -0.8px;
  margin-bottom: 20px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #6200EE 0%, #00d2b4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  max-width: 840px;
  margin: 0 auto 36px;
  color: var(--text-muted);
  font-size: 1.15rem;
  line-height: 1.8;
}

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

.btn-primary {
  background: var(--accent);
  color: #06312a;
  padding: 14px 34px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  box-shadow: 0 8px 25px rgba(0, 210, 180, 0.4);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: #00f2fe;
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 242, 254, 0.5);
  color: #04241e;
}

.btn-secondary {
  background: #ffffff;
  color: var(--primary);
  border: 1.5px solid rgba(98, 0, 238, 0.25);
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary:hover {
  border-color: var(--primary);
  background: rgba(98, 0, 238, 0.04);
  transform: translateY(-2px);
}

/* Metric Bar */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  max-width: 1080px;
  margin: 0 auto 20px;
}

.metric-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.03);
  text-align: center;
  transition: var(--transition);
}

.metric-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--card-shadow);
  border-color: rgba(98, 0, 238, 0.3);
}

.metric-num {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Section Headings */
.section {
  padding: 70px 24px;
  max-width: 1240px;
  margin: 0 auto;
}

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

.section-tag {
  color: var(--primary);
  text-transform: uppercase;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #111827;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

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

/* Advantages Grid */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.advantage-card {
  background: #ffffff;
  border-radius: var(--card-radius);
  padding: 32px 28px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: var(--transition);
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(98, 0, 238, 0.25);
}

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

.adv-icon {
  width: 52px;
  height: 52px;
  background: rgba(98, 0, 238, 0.08);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--primary);
  margin-bottom: 20px;
  transition: var(--transition);
}

.advantage-card:hover .adv-icon {
  background: var(--primary);
  color: #ffffff;
}

.adv-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #111827;
}

.adv-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* Pricing Grid (Referencing Image 1) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

@media (max-width: 960px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
}

.pricing-card {
  background: #ffffff;
  border-radius: var(--card-radius);
  padding: 40px 32px;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  text-align: center;
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-shadow-hover);
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: 0 15px 35px rgba(98, 0, 238, 0.15);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #ffffff;
  padding: 4px 18px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px rgba(98, 0, 238, 0.3);
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 16px;
}

.plan-price-box {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 30px;
}

.plan-currency {
  font-size: 1.6rem;
  font-weight: 800;
  color: #111827;
}

.plan-price {
  font-size: 3.2rem;
  font-weight: 900;
  color: #111827;
  line-height: 1;
}

.plan-period {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 500;
}

.plan-features {
  list-style: none;
  text-align: left;
  margin-bottom: 36px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid #f1f5f9;
  font-size: 0.95rem;
  color: #334155;
}

.plan-feature-item svg {
  color: var(--accent);
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.pricing-btn {
  width: 100%;
  padding: 14px 20px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  border: 1.5px solid var(--border-color);
  background: #ffffff;
  color: #1e293b;
}

.pricing-btn:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.pricing-card.featured .pricing-btn {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 4px 15px rgba(98, 0, 238, 0.35);
}

.pricing-card.featured .pricing-btn:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 20px rgba(98, 0, 238, 0.45);
}

/* Knowledge Base (12 Cards with Card #10 highlighted) */
.knowledge-header-extra {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.tag-filter-btn {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 8px 18px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.tag-filter-btn.active, .tag-filter-btn:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 26px;
}

.article-card {
  background: #ffffff;
  border-radius: var(--card-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  position: relative;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(98, 0, 238, 0.3);
}

/* Position 10 Flagship Card Style with dynamic lighting */
.article-card.pos-10-flagship {
  border: 2px solid #7c4dff;
  background: linear-gradient(180deg, #ffffff 0%, #fbf9ff 100%);
  box-shadow: 0 12px 30px rgba(124, 77, 255, 0.15);
}

.article-card.pos-10-flagship::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
  transform: skewX(-25deg);
  animation: shine 4.5s infinite;
  pointer-events: none;
}

@keyframes shine {
  0% { left: -100%; }
  35% { left: 160%; }
  100% { left: 160%; }
}

.article-card-header {
  padding: 24px 24px 14px;
}

.article-card-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.article-badge {
  font-size: 0.76rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  text-transform: uppercase;
  background: rgba(98, 0, 238, 0.08);
  color: var(--primary);
}

.article-badge.flagship {
  background: linear-gradient(135deg, #6200EE 0%, #00d2b4 100%);
  color: #ffffff;
}

.article-order-tag {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-light);
}

.article-title {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.45;
  color: #1e293b;
  margin-bottom: 10px;
  transition: var(--transition);
}

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

.article-excerpt {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 18px;
  padding: 0 24px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta-footer {
  padding: 16px 24px;
  background: #fcfcfd;
  border-top: 1px solid #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-light);
}

.article-stats-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.article-read-link {
  color: var(--primary);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 50 FAQ Section */
.faq-filter-bar {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.faq-search-wrapper {
  max-width: 620px;
  margin: 0 auto 36px;
  position: relative;
}

.faq-search-input {
  width: 100%;
  padding: 14px 20px 14px 48px;
  border-radius: 50px;
  border: 1.5px solid var(--border-color);
  font-size: 1rem;
  outline: none;
  background: #ffffff;
  transition: var(--transition);
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}

.faq-search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(98, 0, 238, 0.1);
}

.faq-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 1.1rem;
}

.faq-container {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: #ffffff;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: rgba(98, 0, 238, 0.4);
  box-shadow: 0 6px 20px rgba(98, 0, 238, 0.06);
}

.faq-question {
  padding: 18px 24px;
  font-weight: 700;
  font-size: 1.05rem;
  color: #1e293b;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
}

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

.faq-toggle-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(98, 0, 238, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
  color: var(--primary);
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(180deg);
  background: var(--primary);
  color: #ffffff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  color: #475569;
  font-size: 0.95rem;
  line-height: 1.8;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  padding: 0 24px 22px;
  max-height: 800px;
}

/* Call to Action Banner */
.cta-banner {
  background: var(--primary-gradient);
  border-radius: 24px;
  padding: 60px 40px;
  text-align: center;
  color: #ffffff;
  margin: 70px auto 40px;
  max-width: 1200px;
  box-shadow: 0 20px 40px rgba(98, 0, 238, 0.25);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(0, 210, 180, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
}

.cta-title {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.cta-desc {
  max-width: 700px;
  margin: 0 auto 30px;
  font-size: 1.1rem;
  opacity: 0.92;
  line-height: 1.7;
}

/* Footer */
.material-footer {
  background: #111827;
  color: #94a3b8;
  padding: 60px 24px 30px;
  margin-top: 60px;
  border-top: 1px solid #1e293b;
}

.footer-container {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}

@media (max-width: 860px) {
  .footer-container {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  color: #ffffff;
  font-weight: 700;
  font-size: 1.3rem;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-desc {
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-heading {
  color: #ffffff;
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 18px;
}

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

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

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.92rem;
  transition: var(--transition);
}

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

.footer-bottom {
  max-width: 1240px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* Article Template Styles */
.article-page-body {
  background: #ffffff;
}

.article-hero {
  background: linear-gradient(180deg, rgba(98, 0, 238, 0.04) 0%, rgba(255,255,255,1) 100%);
  padding: 50px 24px 30px;
  border-bottom: 1px solid #f1f5f9;
}

.article-container {
  max-width: 920px;
  margin: 0 auto;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

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

.article-main-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: #0f172a;
  line-height: 1.35;
  margin-bottom: 20px;
  letter-spacing: -0.6px;
}

.article-stats-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 14px 18px;
  background: #f8fafc;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-content {
  padding: 40px 24px;
  color: #334155;
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-content h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: #0f172a;
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid #e2e8f0;
  letter-spacing: -0.4px;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #1e293b;
  margin: 30px 0 14px;
}

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

.article-content ul, .article-content ol {
  margin: 0 0 24px 28px;
}

.article-content li {
  margin-bottom: 8px;
}

.tech-table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.95rem;
  background: #ffffff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0,0,0,0.03);
  border: 1px solid #e2e8f0;
}

.tech-table th {
  background: #f1f5f9;
  color: #0f172a;
  font-weight: 700;
  text-align: left;
  padding: 14px 18px;
  border-bottom: 2px solid #cbd5e1;
}

.tech-table td {
  padding: 12px 18px;
  border-bottom: 1px solid #e2e8f0;
  color: #334155;
}

.tech-table tr:hover {
  background: #f8fafc;
}

.code-box {
  background: #1e1e2e;
  color: #cdd6f4;
  border-radius: 12px;
  padding: 20px;
  margin: 24px 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.65;
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  position: relative;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  font-size: 0.8rem;
  color: #a6adc8;
}

.copy-btn {
  background: rgba(255,255,255,0.1);
  border: none;
  color: #cdd6f4;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
}

.copy-btn:hover {
  background: var(--primary);
  color: #ffffff;
}

.article-internal-links {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 28px;
  margin: 50px 0 30px;
}

.article-internal-links h3 {
  margin-top: 0;
  font-size: 1.25rem;
  color: #0f172a;
  margin-bottom: 16px;
}

.internal-link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

.internal-link-card {
  background: #ffffff;
  padding: 14px 18px;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  text-decoration: none;
  color: #334155;
  font-weight: 600;
  font-size: 0.92rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.internal-link-card:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateX(4px);
}

.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent);
  z-index: 9999;
  width: 0%;
  transition: width 0.1s ease-out;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #6200EE;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
  }
  .nav-menu.show {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
}