/* SkyLinXjc.click - Material Design Theme (Inspired by Material Purple & Teal Elevation UI) */
:root {
  --md-primary: #6200ee;
  --md-primary-dark: #4b00c2;
  --md-primary-light: #8e44ff;
  --md-primary-soft: rgba(98, 0, 238, 0.08);
  --md-secondary: #00bfa5;
  --md-secondary-dark: #009688;
  --md-secondary-soft: rgba(0, 191, 165, 0.12);
  --md-pink: #ff2e7e;
  --md-amber: #ffab00;
  --md-blue: #165dff;
  --md-bg: #f6f7fb;
  --md-surface: #ffffff;
  --md-surface-alt: #f1f3f9;
  --md-text: #1c1e26;
  --md-text-secondary: #525866;
  --md-text-muted: #7a8194;
  --md-border: #e5e8f0;
  --md-shadow-1: 0 2px 6px rgba(28, 30, 38, 0.06), 0 1px 2px rgba(28, 30, 38, 0.04);
  --md-shadow-2: 0 8px 24px rgba(98, 0, 238, 0.10), 0 2px 8px rgba(28, 30, 38, 0.05);
  --md-shadow-3: 0 16px 38px rgba(98, 0, 238, 0.16), 0 6px 14px rgba(28, 30, 38, 0.08);
  --md-radius: 16px;
  --md-radius-sm: 10px;
  --md-radius-pill: 999px;
  --container-max: 1200px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--md-bg);
  color: var(--md-text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--md-primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--md-primary-dark);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* Material Colorful Bottom / Top Accent Bar */
.material-spectrum-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  height: 5px;
  width: 100%;
}
.material-spectrum-bar span:nth-child(1) { background: var(--md-primary); }
.material-spectrum-bar span:nth-child(2) { background: var(--md-secondary); }
.material-spectrum-bar span:nth-child(3) { background: var(--md-pink); }
.material-spectrum-bar span:nth-child(4) { background: var(--md-amber); }

/* Top App Bar (Material Style) */
.app-bar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(90deg, #5e00eb 0%, #6d1bf5 55%, #7c3aed 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(98, 0, 238, 0.25);
}

.app-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #ffffff;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.3px;
}

.brand-logo:hover {
  color: #ffffff;
  opacity: 0.92;
}

.brand-badge {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.9);
  padding: 8px 14px;
  border-radius: var(--md-radius-pill);
  font-size: 0.95rem;
  font-weight: 500;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-register-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--md-secondary);
  color: #092c27;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 9px 18px;
  border-radius: var(--md-radius-pill);
  box-shadow: 0 4px 12px rgba(0, 191, 165, 0.35);
  white-space: nowrap;
}

.btn-register-nav:hover {
  background: #1de9b6;
  color: #06211d;
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: none;
  background: rgba(255, 255, 255, 0.18);
  border: none;
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  align-items: center;
  justify-content: center;
}

/* Hero Section */
.hero-section {
  padding: 48px 0 40px;
  background: radial-gradient(circle at 85% 15%, rgba(0, 191, 165, 0.14), transparent 36%),
              radial-gradient(circle at 12% 20%, rgba(98, 0, 238, 0.12), transparent 40%),
              linear-gradient(180deg, #ffffff 0%, var(--md-bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 32px;
  align-items: center;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--md-radius-pill);
  background: var(--md-primary-soft);
  color: var(--md-primary);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--md-secondary);
  box-shadow: 0 0 0 0 rgba(0, 191, 165, 0.7);
  animation: pulseRing 2s infinite;
}

@keyframes pulseRing {
  0% { box-shadow: 0 0 0 0 rgba(0, 191, 165, 0.65); }
  70% { box-shadow: 0 0 0 9px rgba(0, 191, 165, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 191, 165, 0); }
}

.hero-title {
  margin: 0 0 16px;
  font-size: clamp(1.9rem, 3.6vw, 2.75rem);
  line-height: 1.24;
  font-weight: 800;
  color: var(--md-text);
}

.hero-title .highlight {
  background: linear-gradient(120deg, var(--md-primary), #8e44ff, var(--md-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  margin: 0 0 24px;
  font-size: 1.05rem;
  color: var(--md-text-secondary);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.btn-material-teal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--md-secondary);
  color: #062521;
  font-weight: 700;
  padding: 12px 26px;
  border-radius: var(--md-radius-pill);
  box-shadow: 0 6px 18px rgba(0, 191, 165, 0.32);
  border: none;
  cursor: pointer;
}

.btn-material-teal:hover {
  background: #1de9b6;
  color: #041d19;
  transform: translateY(-2px);
}

.btn-material-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #ffffff;
  color: var(--md-primary);
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--md-radius-pill);
  border: 1.5px solid rgba(98, 0, 238, 0.25);
  box-shadow: var(--md-shadow-1);
}

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

.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.keyword-chip {
  font-size: 0.82rem;
  padding: 4px 12px;
  border-radius: var(--md-radius-pill);
  background: #ffffff;
  border: 1px solid var(--md-border);
  color: var(--md-text-secondary);
  font-weight: 500;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

.keyword-chip.primary-chip {
  background: var(--md-primary-soft);
  color: var(--md-primary);
  border-color: rgba(98, 0, 238, 0.2);
}

/* Hero Material Showcase Card (Inspired by Image 2) */
.hero-material-card {
  background: var(--md-surface);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--md-shadow-3);
  border: 1px solid rgba(98, 0, 238, 0.08);
  transition: var(--transition);
}

.hero-material-card:hover {
  transform: translateY(-4px);
}

.material-card-banner {
  background: linear-gradient(135deg, #5e00eb 0%, #7c3aed 55%, #9333ea 100%);
  padding: 26px 26px 22px;
  color: #ffffff;
  position: relative;
}

.material-card-banner::after {
  content: "";
  position: absolute;
  right: -25px;
  top: -25px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}

.telemetry-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 20px 24px 24px;
}

.telemetry-item {
  background: var(--md-surface-alt);
  border-radius: 12px;
  padding: 12px 14px;
}

.telemetry-label {
  font-size: 0.78rem;
  color: var(--md-text-muted);
  display: block;
}

.telemetry-value {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--md-text);
}

/* Section Headers */
.section-block {
  padding: 64px 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 42px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--md-primary);
  background: var(--md-primary-soft);
  padding: 5px 14px;
  border-radius: var(--md-radius-pill);
  margin-bottom: 10px;
}

.section-title {
  margin: 0 0 12px;
  font-size: clamp(1.55rem, 2.6vw, 2.15rem);
  font-weight: 800;
  color: var(--md-text);
}

.section-subtitle {
  margin: 0;
  color: var(--md-text-secondary);
  font-size: 1rem;
}

/* Advantages Grid */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.adv-card {
  background: var(--md-surface);
  border-radius: var(--md-radius);
  padding: 26px;
  box-shadow: var(--md-shadow-1);
  border: 1px solid var(--md-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.adv-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--md-primary), var(--md-secondary));
  opacity: 0;
  transition: var(--transition);
}

.adv-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--md-shadow-2);
}

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

.adv-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--md-primary-soft);
  color: var(--md-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 14px;
}

.adv-card h3 {
  margin: 0 0 8px;
  font-size: 1.12rem;
  font-weight: 700;
}

.adv-card p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--md-text-secondary);
}

/* Pricing Grid (Faithful to Image 1 + Material Elevation) */
.pricing-section {
  background: linear-gradient(180deg, #ffffff 0%, #f2f4fb 100%);
}

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

.pricing-card {
  background: #ffffff;
  border-radius: 18px;
  padding: 28px 24px 26px;
  border: 1.5px solid #e6eaf5;
  box-shadow: var(--md-shadow-1);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--md-shadow-2);
}

.pricing-card.featured {
  border-color: var(--md-blue);
  box-shadow: 0 12px 32px rgba(22, 93, 255, 0.14);
}

.popular-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #2563eb, #165dff);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--md-radius-pill);
  box-shadow: 0 4px 10px rgba(22, 93, 255, 0.28);
}

.pricing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.pricing-name {
  margin: 0;
  font-size: 1.24rem;
  font-weight: 800;
  color: var(--md-text);
}

.pricing-icon-circle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #eef4ff;
  color: var(--md-blue);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.price-box {
  background: #f7f9fc;
  border-radius: 14px;
  padding: 16px 18px;
  margin-bottom: 14px;
}

.price-label {
  display: block;
  font-size: 0.82rem;
  color: var(--md-text-muted);
  margin-bottom: 4px;
}

.price-amount {
  font-size: 2rem;
  font-weight: 800;
  color: var(--md-blue);
  line-height: 1.2;
}

.price-unit {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--md-text-muted);
}

.quota-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ffffff;
  border: 1px solid #ebeff8;
  border-radius: 12px;
  padding: 11px 16px;
  margin-bottom: 18px;
  font-size: 0.94rem;
}

.quota-box span:first-child {
  color: var(--md-text-muted);
}

.quota-box strong {
  color: var(--md-text);
  font-weight: 800;
}

.pricing-details-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--md-text);
  margin: 0 0 10px;
}

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

.pricing-features li {
  position: relative;
  padding-left: 16px;
  font-size: 0.9rem;
  color: var(--md-text-secondary);
  margin-bottom: 9px;
}

.pricing-features li::before {
  content: "•";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--md-blue);
  font-weight: 900;
}

.btn-subscribe {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px 18px;
  border-radius: 12px;
  background: var(--md-blue);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.98rem;
  box-shadow: 0 6px 16px rgba(22, 93, 255, 0.26);
}

.btn-subscribe:hover {
  background: #0e4ae0;
  color: #ffffff;
}

.pricing-flexible-note {
  margin-top: 26px;
  background: #ffffff;
  border: 1px dashed rgba(98, 0, 238, 0.3);
  border-radius: 14px;
  padding: 16px 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 0.94rem;
  color: var(--md-text-secondary);
}

/* Dynamic Article Showcase Section */
.article-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 26px;
  background: #ffffff;
  padding: 14px 18px;
  border-radius: 16px;
  box-shadow: var(--md-shadow-1);
  border: 1px solid var(--md-border);
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-tab {
  border: 1px solid var(--md-border);
  background: var(--md-surface-alt);
  color: var(--md-text-secondary);
  padding: 7px 15px;
  border-radius: var(--md-radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

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

.search-input-wrap {
  position: relative;
  min-width: 240px;
}

.search-input-wrap input {
  width: 100%;
  padding: 9px 14px 9px 36px;
  border-radius: var(--md-radius-pill);
  border: 1px solid var(--md-border);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.search-input-wrap input:focus {
  border-color: var(--md-primary);
  box-shadow: 0 0 0 3px var(--md-primary-soft);
}

.search-input-wrap span {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--md-text-muted);
  font-size: 0.92rem;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.article-card {
  background: var(--md-surface);
  border-radius: var(--md-radius);
  overflow: hidden;
  box-shadow: var(--md-shadow-1);
  border: 1px solid var(--md-border);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--md-shadow-2);
}

.article-card-top {
  height: 11px;
  background: linear-gradient(90deg, var(--md-primary), var(--md-secondary));
  position: relative;
  overflow: hidden;
}

.article-card.spotlight-card {
  border: 1.5px solid rgba(98, 0, 238, 0.45);
  box-shadow: var(--md-shadow-2);
}

.article-card.spotlight-card .article-card-top {
  height: 54px;
  background: linear-gradient(120deg, #5e00eb, #7c3aed, #00bfa5);
  background-size: 200% 200%;
  animation: gradientFlow 6s ease infinite;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
}

@keyframes gradientFlow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.article-card-body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--md-text-muted);
  margin-bottom: 10px;
}

.article-cat-pill {
  background: var(--md-primary-soft);
  color: var(--md-primary);
  padding: 2px 10px;
  border-radius: var(--md-radius-pill);
  font-weight: 600;
}

.article-card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
  line-height: 1.42;
  font-weight: 700;
}

.article-card h3 a {
  color: var(--md-text);
}

.article-card h3 a:hover {
  color: var(--md-primary);
}

.article-card p {
  margin: 0 0 16px;
  font-size: 0.9rem;
  color: var(--md-text-secondary);
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--md-border);
  font-size: 0.82rem;
  color: var(--md-text-muted);
}

.read-more-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--md-secondary-soft);
  color: #00796b;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: var(--md-radius-pill);
  font-size: 0.82rem;
}

.read-more-pill:hover {
  background: var(--md-secondary);
  color: #062521;
}

/* Reveal Animation */
.reveal-card {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Article Detail Page */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--md-text-muted);
  margin: 22px 0 16px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 310px;
  gap: 28px;
  align-items: start;
  padding-bottom: 64px;
}

.article-main {
  background: var(--md-surface);
  border-radius: 20px;
  padding: 36px 38px;
  box-shadow: var(--md-shadow-1);
  border: 1px solid var(--md-border);
  min-width: 0;
}

.article-hero-header {
  border-bottom: 1px solid var(--md-border);
  padding-bottom: 22px;
  margin-bottom: 28px;
}

.article-hero-header h1 {
  margin: 12px 0 14px;
  font-size: clamp(1.55rem, 2.8vw, 2.15rem);
  line-height: 1.32;
  font-weight: 800;
}

.article-stats-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.86rem;
  color: var(--md-text-muted);
}

.article-stats-bar span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--md-surface-alt);
  padding: 4px 12px;
  border-radius: var(--md-radius-pill);
}

.article-prose h2 {
  margin: 34px 0 14px;
  font-size: 1.38rem;
  font-weight: 800;
  color: var(--md-text);
  padding-left: 14px;
  border-left: 4px solid var(--md-primary);
}

.article-prose h3 {
  margin: 24px 0 10px;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--md-primary-dark);
}

.article-prose p {
  margin: 0 0 16px;
  font-size: 1.02rem;
  color: #2c313d;
  line-height: 1.85;
}

.article-prose ul {
  padding-left: 20px;
  margin: 0 0 18px;
}

.article-prose li {
  margin-bottom: 8px;
  color: #2c313d;
}

.tldr-box {
  background: linear-gradient(135deg, rgba(98, 0, 238, 0.05), rgba(0, 191, 165, 0.07));
  border: 1px solid rgba(98, 0, 238, 0.16);
  border-radius: 14px;
  padding: 18px 22px;
  margin-bottom: 26px;
}

.tldr-box strong {
  color: var(--md-primary);
  display: block;
  margin-bottom: 6px;
  font-size: 0.96rem;
}

/* Tables & Code Blocks */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 22px 0;
  border-radius: 12px;
  border: 1px solid var(--md-border);
}

.article-prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: #ffffff;
}

.article-prose th {
  background: #f3effe;
  color: var(--md-primary-dark);
  font-weight: 700;
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--md-border);
}

.article-prose td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--md-border);
  color: var(--md-text-secondary);
}

.article-prose tr:last-child td {
  border-bottom: none;
}

.code-block-wrap {
  position: relative;
  margin: 20px 0;
  border-radius: 12px;
  overflow: hidden;
  background: #171923;
  box-shadow: var(--md-shadow-1);
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: #232635;
  color: #cbd5e1;
  font-size: 0.78rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.copy-code-btn {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border: none;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.76rem;
}

.copy-code-btn:hover {
  background: var(--md-secondary);
  color: #062521;
}

.code-block-wrap pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  color: #e2e8f0;
  font-size: 0.87rem;
  line-height: 1.6;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Article Bottom FAQ & Meta Footer */
.article-faq-section {
  margin-top: 38px;
  padding-top: 28px;
  border-top: 1px solid var(--md-border);
}

.article-faq-section h2 {
  margin-top: 0;
}

.faq-item {
  background: var(--md-surface-alt);
  border-radius: 14px;
  margin-bottom: 12px;
  border: 1px solid var(--md-border);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 16px 20px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--md-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.faq-question::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--md-primary);
  font-weight: 700;
  flex-shrink: 0;
}

.faq-item.open .faq-question::after {
  content: "−";
}

.faq-answer {
  display: none;
  padding: 0 20px 16px;
  font-size: 0.95rem;
  color: var(--md-text-secondary);
  line-height: 1.78;
}

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

.article-bottom-telemetry {
  margin-top: 28px;
  padding: 16px 20px;
  background: #f8f9fd;
  border-radius: 12px;
  border: 1px solid var(--md-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--md-text-muted);
}

.article-prev-next {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.nav-post-card {
  background: var(--md-surface-alt);
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid var(--md-border);
  display: block;
}

.nav-post-card:hover {
  border-color: var(--md-primary);
  background: #ffffff;
}

.nav-post-label {
  display: block;
  font-size: 0.78rem;
  color: var(--md-text-muted);
  margin-bottom: 4px;
}

.nav-post-title {
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--md-text);
}

/* Sidebar */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 86px;
}

.sidebar-card {
  background: var(--md-surface);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--md-shadow-1);
  border: 1px solid var(--md-border);
}

.sidebar-card h3 {
  margin: 0 0 12px;
  font-size: 1.02rem;
  font-weight: 800;
}

.sidebar-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar-links li {
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--md-border);
}

.sidebar-links li:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.sidebar-links a {
  font-size: 0.9rem;
  color: var(--md-text-secondary);
  font-weight: 500;
  display: block;
}

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

/* Footer */
.site-footer {
  background: #171821;
  color: #cbd5e1;
  padding: 46px 0 28px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 30px;
}

.footer-title {
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 12px;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--md-secondary);
}

.footer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.footer-tag {
  font-size: 0.78rem;
  padding: 3px 10px;
  border-radius: var(--md-radius-pill);
  background: rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.84rem;
  color: #94a3b8;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-grid,
  .advantages-grid,
  .pricing-grid,
  .articles-grid,
  .article-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 820px) {
  .mobile-menu-btn {
    display: inline-flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #5500d6;
    flex-direction: column;
    padding: 14px 20px 20px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
  }
  .nav-links.open {
    display: flex;
  }
  .article-main {
    padding: 24px 18px;
  }
  .article-prev-next {
    grid-template-columns: 1fr;
  }
}