/* ==========================================================================
   Gatern 机场 - 视觉规范与响应式样式表
   Palette:
     - Background: #FFFCF8 (瓷白象牙暖色)
     - Deep Indigo: #333D6B (深靛蓝)
     - Ceramic Orange: #C97D50 (陶土橙)
     - Pale Lilac: #EBEAF3 (淡紫丁香)
   ========================================================================== */

:root {
  --bg-primary: #FFFCF8;
  --bg-secondary: #F7F4EE;
  --bg-card: #FFFFFF;
  --color-indigo: #333D6B;
  --color-indigo-dark: #232A4A;
  --color-indigo-light: #444E7E;
  --color-orange: #C97D50;
  --color-orange-hover: #B46B40;
  --color-lilac: #EBEAF3;
  --color-lilac-dark: #D7D5E5;
  --text-main: #222638;
  --text-muted: #5C6278;
  --text-light: #F4F3F8;
  --border-subtle: rgba(51, 61, 107, 0.12);
  --border-strong: rgba(51, 61, 107, 0.24);
  --shadow-sm: 0 2px 6px rgba(51, 61, 107, 0.05);
  --shadow-md: 0 8px 24px rgba(51, 61, 107, 0.08);
  --shadow-lg: 0 16px 36px rgba(51, 61, 107, 0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-heading: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: Georgia, "Songti SC", "Source Han Serif SC", "Noto Serif SC", "SimSun", serif;
  --container-max: 1240px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  background-color: var(--bg-primary);
  color: var(--text-main);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-indigo);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

/* Heading Sizes */
h1 {
  font-size: 37px; /* Mobile H1 requirement */
}
@media (min-width: 1024px) {
  h1 {
    font-size: 59px; /* Desktop H1 requirement */
  }
}

h2 {
  font-size: 26px;
  margin-bottom: 0.75rem;
}
@media (min-width: 768px) {
  h2 {
    font-size: 34px;
  }
}

h3 {
  font-size: 20px;
  margin-bottom: 0.5rem;
}
@media (min-width: 768px) {
  h3 {
    font-size: 23px;
  }
}

p {
  margin-bottom: 1.15rem;
}

a {
  color: var(--color-orange);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover, a:focus-visible {
  color: var(--color-orange-hover);
  text-decoration: underline;
}

a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--color-orange);
  outline-offset: 3px;
}

img, svg {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

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

@media (min-width: 768px) {
  .container {
    padding-left: 32px;
    padding-right: 32px;
  }
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 252, 248, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.25s ease;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-indigo);
  font-family: var(--font-heading);
  font-size: 21px;
  font-weight: 800;
}

.brand-logo svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.brand-badge {
  font-size: 11px;
  font-weight: 600;
  background-color: var(--color-lilac);
  color: var(--color-indigo);
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.nav-desktop {
  display: none;
}

@media (min-width: 960px) {
  .nav-desktop {
    display: flex;
    align-items: center;
    gap: 28px;
  }
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-indigo);
  text-decoration: none;
  padding: 6px 2px;
  position: relative;
  transition: color 0.2s;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-orange);
  text-decoration: none;
}

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

.header-cta-group {
  display: none;
  align-items: center;
  gap: 14px;
}

@media (min-width: 960px) {
  .header-cta-group {
    display: flex;
  }
}

/* Mobile Menu Button */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  padding: 0;
  gap: 5px;
}

@media (min-width: 960px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.mobile-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-indigo);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  height: calc(100vh - 72px);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
  padding: 24px 20px;
  overflow-y: auto;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
  z-index: 99;
}

.mobile-nav-drawer.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 30px;
}

.mobile-nav-link {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 600;
  color: var(--color-indigo);
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 1px solid rgba(51, 61, 107, 0.08);
}

.mobile-nav-cta {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background-color 0.2s, transform 0.15s, border-color 0.2s, box-shadow 0.2s;
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1.2;
  text-align: center;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background-color: var(--color-orange);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--color-orange-hover);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(201, 125, 80, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-indigo);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  background-color: var(--color-lilac);
  color: var(--color-indigo-dark);
}

.btn-indigo {
  background-color: var(--color-indigo);
  color: #FFFFFF;
}

.btn-indigo:hover {
  background-color: var(--color-indigo-dark);
  color: #FFFFFF;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

.btn-lg {
  padding: 15px 32px;
  font-size: 16px;
}

.btn-full {
  width: 100%;
}

/* Hero Section */
.hero-section {
  padding: 48px 0 64px;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
}

@media (min-width: 1024px) {
  .hero-section {
    padding: 72px 0 88px;
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
  }
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-orange);
  background-color: rgba(201, 125, 80, 0.1);
  padding: 6px 14px;
  border-radius: 20px;
  width: fit-content;
  letter-spacing: 0.5px;
}

.hero-title {
  color: var(--color-indigo);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 8px;
}

@media (min-width: 480px) {
  .hero-actions {
    flex-direction: row;
    align-items: center;
  }
}

.hero-features-list {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-heading);
  font-size: 14px;
  color: var(--color-indigo);
}

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

.hero-feature-item svg {
  color: var(--color-orange);
  width: 16px;
  height: 16px;
}

/* Hero Right: Dial Dashboard (Subtle, No Neon) */
.hero-dashboard {
  background-color: #FFFFFF;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 20px;
}

.dashboard-title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-indigo);
  display: flex;
  align-items: center;
  gap: 8px;
}

.dashboard-tag {
  font-family: var(--font-heading);
  font-size: 12px;
  background-color: var(--color-lilac);
  color: var(--color-indigo);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}

/* Dial Center Container */
.dial-container {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  width: 270px;
  height: 270px;
  margin: 10px auto 20px;
}

@media (min-width: 480px) {
  .dial-container {
    width: 300px;
    height: 300px;
  }
}

.dial-svg {
  width: 100%;
  height: 100%;
}

/* Rotating Dial Indicator: Slow rotation, needle only */
.dial-indicator-needle {
  transform-origin: 150px 150px;
  animation: slow-dial-sweep 12s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes slow-dial-sweep {
  0% {
    transform: rotate(0deg);
  }
  50% {
    transform: rotate(180deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .dial-indicator-needle {
    animation: none;
  }
}

/* Regional Route Badges */
.dial-regions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 10px;
}

.region-node-pill {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-size: 13px;
}

.region-node-name {
  font-weight: 600;
  color: var(--color-indigo);
  display: flex;
  align-items: center;
  gap: 6px;
}

.region-node-flag {
  font-size: 14px;
}

.region-node-role {
  font-size: 11px;
  color: var(--color-orange);
  background: rgba(201, 125, 80, 0.1);
  padding: 2px 6px;
  border-radius: 3px;
}

.dashboard-footer-note {
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 14px;
  line-height: 1.5;
  font-family: var(--font-heading);
}

/* Section Common */
.section {
  padding: 64px 0;
}

@media (min-width: 1024px) {
  .section {
    padding: 88px 0;
  }
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 48px;
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-orange);
  background-color: rgba(201, 125, 80, 0.1);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Benefits: Stepped Composition */
.benefits-section {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.stepped-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: stretch;
}

@media (min-width: 960px) {
  .stepped-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }
  /* Stepped vertical layout */
  .step-card:nth-child(1) {
    transform: translateY(0);
  }
  .step-card:nth-child(2) {
    transform: translateY(24px);
  }
  .step-card:nth-child(3) {
    transform: translateY(48px);
  }
  .stepped-grid-wrap {
    padding-bottom: 48px;
  }
}

.step-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s, box-shadow 0.25s;
}

.step-card:hover {
  box-shadow: var(--shadow-md);
}

.step-number {
  font-family: var(--font-heading);
  font-size: 38px;
  font-weight: 800;
  color: var(--color-orange);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.85;
}

.step-card h3 {
  color: var(--color-indigo);
  margin-bottom: 12px;
}

.step-card p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* Global Nodes: Compact Regional Directory */
.nodes-section {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
}

.nodes-directory-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .nodes-directory-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .nodes-directory-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.node-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.node-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-indigo);
}

.node-flag {
  font-size: 20px;
}

.node-type-tag {
  font-family: var(--font-heading);
  font-size: 11px;
  background-color: var(--color-lilac);
  color: var(--color-indigo);
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 600;
}

.node-details-list {
  list-style: none;
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.node-details-list li {
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.node-details-list li svg {
  width: 15px;
  height: 15px;
  color: var(--color-orange);
  flex-shrink: 0;
  margin-top: 4px;
}

.nodes-notice {
  margin-top: 36px;
  background-color: var(--bg-secondary);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  font-family: var(--font-heading);
}

/* Alternating Indigo / White Narrative: AI & Streaming */
.narrative-container {
  overflow: hidden;
}

/* AI Scenario: Deep Indigo Section */
.ai-scenario-section {
  background-color: var(--color-indigo);
  color: #FFFFFF;
  padding: 72px 0 88px;
}

.ai-scenario-section h2,
.ai-scenario-section h3,
.ai-scenario-section .section-title {
  color: #FFFFFF;
}

.ai-scenario-section .section-subtitle {
  color: var(--color-lilac);
}

.ai-scenario-section .section-eyebrow {
  background-color: rgba(235, 234, 243, 0.15);
  color: #FFFFFF;
}

.ai-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .ai-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .ai-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.ai-card {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(235, 234, 243, 0.15);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(8px);
  transition: transform 0.2s, background-color 0.2s;
}

.ai-card:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.ai-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.ai-icon-box {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: rgba(201, 125, 80, 0.25);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  font-family: var(--font-heading);
}

.ai-card-title {
  font-size: 19px;
  color: #FFFFFF;
  margin-bottom: 0;
}

.ai-card p {
  color: var(--color-lilac);
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 12px;
}

.ai-card-badge {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
  padding: 2px 8px;
  border-radius: 4px;
}

/* Streaming Scenario: White / Warm Ceramic Section */
.streaming-scenario-section {
  background-color: var(--bg-primary);
  padding: 72px 0 88px;
  border-bottom: 1px solid var(--border-subtle);
}

.streaming-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .streaming-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .streaming-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.streaming-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.streaming-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.streaming-icon-box {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--color-lilac);
  color: var(--color-indigo);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  font-family: var(--font-heading);
}

.streaming-card-title {
  font-size: 19px;
  color: var(--color-indigo);
  margin-bottom: 0;
}

.streaming-card p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 12px;
}

.streaming-card-badge {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 600;
  background-color: rgba(201, 125, 80, 0.1);
  color: var(--color-orange);
  padding: 2px 8px;
  border-radius: 4px;
}

/* Pricing Section */
.pricing-section {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.pricing-disclaimer {
  max-width: 860px;
  margin: 0 auto 36px;
  background-color: #FFFFFF;
  border: 1px dashed var(--color-orange);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-indigo-dark);
  text-align: center;
  font-family: var(--font-heading);
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pricing-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s, box-shadow 0.25s;
}

.pricing-card:hover {
  box-shadow: var(--shadow-md);
}

.pricing-card.featured {
  border: 2px solid var(--color-orange);
  box-shadow: var(--shadow-md);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-orange);
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 12px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.pricing-header {
  text-align: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 20px;
}

.pricing-tier-name {
  font-size: 20px;
  color: var(--color-indigo);
  margin-bottom: 6px;
}

.pricing-placeholder-tag {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-heading);
  display: block;
  margin-bottom: 10px;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin: 12px 0 4px;
}

.pricing-currency {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-indigo);
}

.pricing-amount {
  font-size: 34px;
  font-weight: 800;
  font-family: var(--font-heading);
  color: var(--color-indigo);
}

.pricing-period {
  font-size: 13px;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  font-size: 14px;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.pricing-features li svg {
  width: 16px;
  height: 16px;
  color: var(--color-orange);
  flex-shrink: 0;
  margin-top: 3px;
}

/* Articles Section: Editorial 3x3 Layout */
.articles-section {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
}

.articles-grid {
  display: grid;
  grid-template-columns: 1fr; /* Mobile: 1 col */
  gap: 24px;
}

@media (min-width: 640px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr); /* Tablet: 2 cols */
  }
}

@media (min-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(3, 1fr); /* Desktop: 3 cols (3x3 = 9 cards) */
    gap: 30px;
  }
}

.article-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s, box-shadow 0.2s;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-category {
  background-color: var(--color-lilac);
  color: var(--color-indigo);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.article-title {
  font-size: 19px;
  line-height: 1.4;
  margin-bottom: 10px;
}

.article-title a {
  color: var(--color-indigo);
  text-decoration: none;
}

.article-title a:hover {
  color: var(--color-orange);
}

.article-excerpt {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 18px;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-heading);
  font-size: 13px;
}

.article-link {
  color: var(--color-orange);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-link:hover {
  text-decoration: underline;
}

/* Testimonials Section (Sourced / Sample) */
.testimonials-section {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .testimonials-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.testimonial-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-quote {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-main);
  margin-bottom: 16px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
}

.author-avatar-initial {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-lilac);
  color: var(--color-indigo);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.author-info {
  font-family: var(--font-heading);
  font-size: 13px;
}

.author-name {
  font-weight: 700;
  color: var(--color-indigo);
}

.author-role {
  font-size: 11px;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-section {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
}

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

.faq-item {
  background-color: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-summary {
  padding: 20px 24px;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-indigo);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s;
  user-select: none;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-summary:hover {
  background-color: var(--bg-secondary);
}

.faq-icon {
  width: 18px;
  height: 18px;
  color: var(--color-orange);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

details[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 24px 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
}

.faq-content p:last-child {
  margin-bottom: 0;
}

/* Footer */
.site-footer {
  background-color: var(--color-indigo-dark);
  color: #FFFFFF;
  padding: 64px 0 32px;
  font-family: var(--font-heading);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

@media (min-width: 768px) {
  .footer-top {
    grid-template-columns: 1.5fr repeat(3, 1fr);
  }
}

.footer-brand p {
  color: var(--color-lilac);
  font-size: 14px;
  line-height: 1.7;
  margin-top: 14px;
  font-family: var(--font-body);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
}

.footer-links a {
  color: var(--color-lilac);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--color-orange);
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(235, 234, 243, 0.12);
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(235, 234, 243, 0.6);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    text-align: left;
  }
}

/* Article / Page Detail Layout */
.article-header {
  padding: 48px 0 32px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

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

.breadcrumb a:hover {
  color: var(--color-orange);
}

.article-content-wrapper {
  padding: 48px 0 72px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: 2.8fr 1.2fr;
    gap: 48px;
  }
}

.article-body {
  font-size: 17px;
  line-height: 1.85;
}

.article-body h2 {
  font-size: 26px;
  margin-top: 36px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-body h3 {
  font-size: 20px;
  margin-top: 28px;
  margin-bottom: 12px;
}

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

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

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

.article-body blockquote {
  border-left: 4px solid var(--color-orange);
  background-color: var(--bg-secondary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  font-style: italic;
  color: var(--color-indigo-dark);
}

.article-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
  background-color: var(--color-lilac);
  color: var(--color-indigo-dark);
  padding: 2px 6px;
  border-radius: 4px;
}

.article-body pre {
  background-color: var(--color-indigo-dark);
  color: #FFFFFF;
  padding: 20px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 24px 0;
}

.article-body pre code {
  background-color: transparent;
  color: #FFFFFF;
  padding: 0;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background-color: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-indigo);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.related-articles-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-family: var(--font-heading);
  font-size: 14px;
}

.related-articles-list a {
  color: var(--color-indigo);
  text-decoration: none;
  line-height: 1.5;
  display: block;
}

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

/* Callout box */
.callout-box {
  background-color: var(--color-lilac);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--color-indigo);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 24px 0;
}

.callout-box-title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-indigo);
  margin-bottom: 6px;
}

.callout-box p {
  font-size: 14px;
  color: var(--color-indigo-dark);
  margin-bottom: 0;
}

/* Diagram styling inside articles */
.architecture-diagram {
  background-color: #FFFFFF;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 28px 0;
  text-align: center;
}

.diagram-caption {
  font-family: var(--font-heading);
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 12px;
}