/* ==========================================================================
   FlashCat 闪电猫 - Premium Copper & Slate Design System
   Palette:
     Slate: #29343B
     White: #FFFFFF
     Pale Blue-Gray: #EFF3F3
     Muted Copper: #B18467
   Typography:
     Heading: Bold condensed system stack
     Body: Normal system sans-serif (17px)
   ========================================================================== */

:root {
  --color-slate: #29343B;
  --color-slate-dark: #1E272D;
  --color-slate-light: #37454E;
  --color-slate-surface: #242E35;
  --color-slate-border: #41505A;
  
  --color-white: #FFFFFF;
  --color-pale-bg: #EFF3F3;
  --color-pale-surface: #E5ECEC;
  --color-pale-border: #D6DFDF;
  
  --color-copper: #B18467;
  --color-copper-hover: #986D52;
  --color-copper-light: #F4ECE7;
  --color-copper-border: rgba(177, 132, 103, 0.35);

  --color-text-main: #1D252A;
  --color-text-muted: #57646C;
  --color-text-on-dark: #EDF1F3;
  --color-text-dim-on-dark: #A0ACB2;

  --font-heading: "Arial Narrow", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif-condensed, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --h1-desktop: 54px;
  --h1-mobile: 35px;
  --body-size: 17px;

  --container-max: 1200px;
  --container-narrow: 880px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --transition: all 0.25s ease-in-out;
}

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

html {
  font-size: var(--body-size);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-main);
  background-color: var(--color-white);
  overflow-x: hidden;
}

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

h1 {
  font-size: var(--h1-desktop);
}

h2 {
  font-size: 32px;
  margin-bottom: 16px;
}

h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

p {
  margin-bottom: 16px;
}

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

a:hover, a:focus-visible {
  color: var(--color-copper-hover);
}

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

ul, ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container-narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-top: 80px;
  padding-bottom: 80px;
}

.section-pale {
  background-color: var(--color-pale-bg);
}

.section-slate {
  background-color: var(--color-slate);
  color: var(--color-text-on-dark);
}

.section-slate h2, .section-slate h3 {
  color: var(--color-white);
}

.section-title-wrap {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px;
}

.section-badge {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-copper);
  background: var(--color-copper-light);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.section-badge-dark {
  background: rgba(177, 132, 103, 0.2);
  color: #D8BEB0;
  border: 1px solid var(--color-copper-border);
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: 18px;
}

.section-slate .section-subtitle {
  color: var(--color-text-dim-on-dark);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-pale-border);
  box-shadow: 0 2px 10px rgba(41, 52, 59, 0.04);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-slate);
  text-decoration: none;
}

.brand-logo-icon {
  width: 32px;
  height: 32px;
  background-color: var(--color-slate);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-copper);
}

.brand-logo-text {
  letter-spacing: -0.02em;
}

.brand-logo-tag {
  font-size: 11px;
  font-weight: 600;
  background: var(--color-pale-bg);
  color: var(--color-slate);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-pale-border);
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-slate);
  padding: 6px 0;
  position: relative;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--color-copper);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-copper);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-copper);
  color: var(--color-white) !important;
}

.btn-primary:hover, .btn-primary:focus-visible {
  background-color: var(--color-copper-hover);
  color: var(--color-white) !important;
}

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

.btn-secondary:hover, .btn-secondary:focus-visible {
  background-color: var(--color-pale-bg);
  color: var(--color-slate);
}

.btn-ghost-dark {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-ghost-dark:hover {
  background-color: rgba(255, 255, 255, 0.16);
  color: var(--color-white);
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-slate);
  font-size: 26px;
  cursor: pointer;
  padding: 6px;
}

/* Mobile Nav Drawer */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(41, 52, 59, 0.6);
  backdrop-filter: blur(4px);
  z-index: 998;
}

.mobile-nav-panel {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--color-white);
  padding: 24px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  z-index: 999;
  border-bottom: 1px solid var(--color-pale-border);
}

.mobile-nav-panel.open {
  display: block;
}

.mobile-nav-links {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.mobile-nav-links li {
  border-bottom: 1px solid var(--color-pale-bg);
}

.mobile-nav-links a {
  display: block;
  padding: 14px 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-slate);
}

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

/* Split Hero Section */
.hero-split {
  padding-top: 56px;
  padding-bottom: 72px;
  background-color: var(--color-white);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-left {
  padding-right: 12px;
}

.hero-left h1 {
  color: var(--color-slate);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-intro {
  font-size: 18px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.hero-notice {
  font-size: 13px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-notice-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-copper);
}

/* Dark Slate Dashboard (Hero Right) */
.hero-dashboard {
  background-color: var(--color-slate);
  border-radius: var(--radius-lg);
  padding: 28px;
  color: var(--color-text-on-dark);
  border: 1px solid var(--color-slate-border);
  box-shadow: 0 16px 36px rgba(41, 52, 59, 0.16);
  position: relative;
  overflow: hidden;
}

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

.dash-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.dash-title-dot {
  width: 9px;
  height: 9px;
  background-color: var(--color-copper);
  border-radius: 50%;
  animation: pulse-copper 2.5s infinite;
}

.dash-subtitle {
  font-size: 12px;
  color: var(--color-text-dim-on-dark);
  font-family: var(--font-mono);
}

/* Restrained route lines & status diagram */
.dash-routes-canvas {
  margin-bottom: 20px;
  padding: 16px;
  background-color: var(--color-slate-surface);
  border-radius: var(--radius-md);
  border: 1px solid rgba(177, 132, 103, 0.2);
}

.route-diagram-header {
  font-size: 12px;
  color: var(--color-text-dim-on-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
}

.route-list-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.route-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background-color: rgba(41, 52, 59, 0.7);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-slate-border);
  position: relative;
}

.route-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background-color: var(--color-copper);
}

.route-left-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.route-code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-copper);
  font-weight: 700;
  background: rgba(177, 132, 103, 0.15);
  padding: 2px 6px;
  border-radius: 3px;
}

.route-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-white);
}

.route-line-visual {
  flex: 1;
  margin: 0 16px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-copper) 0%, rgba(177, 132, 103, 0.2) 100%);
  position: relative;
}

.route-line-visual::after {
  content: "";
  position: absolute;
  top: -2px;
  right: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-copper);
}

.route-tag {
  font-size: 11px;
  color: #D8BEB0;
  background-color: rgba(177, 132, 103, 0.12);
  padding: 3px 8px;
  border-radius: 3px;
  font-family: var(--font-mono);
}

.dash-footer-note {
  font-size: 12px;
  color: var(--color-text-dim-on-dark);
  line-height: 1.5;
  border-top: 1px solid var(--color-slate-border);
  padding-top: 14px;
}

@keyframes pulse-copper {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

/* Horizontal Benefits Band */
.section-benefits {
  background-color: var(--color-pale-bg);
  border-top: 1px solid var(--color-pale-border);
  border-bottom: 1px solid var(--color-pale-border);
  padding-top: 56px;
  padding-bottom: 56px;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.benefit-card {
  background: var(--color-white);
  padding: 32px 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-pale-border);
  box-shadow: 0 4px 14px rgba(41, 52, 59, 0.04);
}

.benefit-num {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-copper);
  line-height: 1;
  margin-bottom: 14px;
}

.benefit-card h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

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

/* Editorial Nodes List Section */
.nodes-editorial-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.node-editorial-card {
  border: 1px solid var(--color-pale-border);
  border-radius: var(--radius-md);
  padding: 24px;
  background: var(--color-white);
  transition: var(--transition);
}

.node-editorial-card:hover {
  border-color: var(--color-copper);
  box-shadow: 0 6px 18px rgba(41, 52, 59, 0.06);
}

.node-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-pale-bg);
}

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

.node-flag {
  font-size: 18px;
}

.node-badge-tier {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--color-pale-bg);
  color: var(--color-text-muted);
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid var(--color-pale-border);
}

.node-editorial-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.node-features-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.node-pill {
  font-size: 12px;
  background: var(--color-copper-light);
  color: var(--color-copper-hover);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* AI & Streaming Scenarios (Contrasting side-by-side) */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.scenario-column {
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}

.scenario-ai {
  background-color: var(--color-slate);
  color: var(--color-text-on-dark);
  border: 1px solid var(--color-slate-border);
}

.scenario-ai h3 {
  color: var(--color-white);
  font-size: 24px;
  margin-bottom: 12px;
}

.scenario-ai .scenario-desc {
  color: var(--color-text-dim-on-dark);
  font-size: 15px;
  margin-bottom: 24px;
}

.scenario-media {
  background-color: var(--color-pale-bg);
  color: var(--color-text-main);
  border: 1px solid var(--color-pale-border);
}

.scenario-media h3 {
  color: var(--color-slate);
  font-size: 24px;
  margin-bottom: 12px;
}

.scenario-media .scenario-desc {
  color: var(--color-text-muted);
  font-size: 15px;
  margin-bottom: 24px;
}

.service-item-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.service-item {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.scenario-ai .service-item {
  background-color: var(--color-slate-surface);
  border-left: 3px solid var(--color-copper);
}

.scenario-media .service-item {
  background-color: var(--color-white);
  border-left: 3px solid var(--color-slate);
  border-right: 1px solid var(--color-pale-border);
  border-top: 1px solid var(--color-pale-border);
  border-bottom: 1px solid var(--color-pale-border);
}

.service-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.service-tag {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
}

.scenario-ai .service-tag {
  background: rgba(177, 132, 103, 0.2);
  color: #D8BEB0;
}

.scenario-media .service-tag {
  background: var(--color-pale-bg);
  color: var(--color-slate);
}

.service-desc {
  font-size: 13.5px;
  line-height: 1.55;
  margin-bottom: 0;
}

.scenario-ai .service-desc {
  color: var(--color-text-dim-on-dark);
}

.scenario-media .service-desc {
  color: var(--color-text-muted);
}

/* Pricing Section */
.pricing-section {
  background-color: var(--color-pale-bg);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 32px;
}

.pricing-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  border: 1px solid var(--color-pale-border);
  position: relative;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(41, 52, 59, 0.08);
}

.pricing-card.featured {
  border: 2px solid var(--color-copper);
}

.pricing-badge-popular {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--color-copper);
  color: var(--color-white);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 20px;
  text-transform: uppercase;
}

.pricing-tier-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-slate);
  margin-bottom: 6px;
}

.pricing-tier-summary {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  min-height: 42px;
}

.pricing-amount-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-pale-bg);
}

.pricing-currency {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-copper);
}

.pricing-amount {
  font-family: var(--font-heading);
  font-size: 44px;
  font-weight: 700;
  color: var(--color-slate);
  line-height: 1;
}

.pricing-cycle {
  font-size: 14px;
  color: var(--color-text-muted);
}

.pricing-features-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  flex: 1;
}

.pricing-features-list li {
  font-size: 14px;
  color: var(--color-text-main);
  padding: 8px 0;
  border-bottom: 1px dashed var(--color-pale-bg);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-check-icon {
  color: var(--color-copper);
  font-weight: bold;
}

.pricing-btn-wrap {
  margin-top: auto;
}

.pricing-editorial-disclaimer {
  text-align: center;
  font-size: 13px;
  color: var(--color-text-muted);
  max-width: 800px;
  margin: 0 auto;
}

/* Articles Grid Section (Under pricing) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: var(--color-white);
  border: 1px solid var(--color-pale-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--color-copper);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(41, 52, 59, 0.06);
}

.article-card-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-copper);
  background: var(--color-copper-light);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 12px;
  align-self: flex-start;
}

.article-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-slate);
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-card-title a {
  color: var(--color-slate);
}

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

.article-card-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--color-text-muted);
  padding-top: 14px;
  border-top: 1px solid var(--color-pale-bg);
}

.article-read-more {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-copper);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Sample Testimonials Section */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--color-white);
  border: 1px solid var(--color-pale-border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}

.testimonial-scenario-tag {
  font-size: 11px;
  color: var(--color-slate);
  background: var(--color-pale-bg);
  padding: 2px 8px;
  border-radius: 3px;
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.testimonial-quote {
  font-size: 15px;
  color: var(--color-text-main);
  line-height: 1.65;
  margin-bottom: 18px;
}

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

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

.author-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-slate);
}

.author-role {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* FAQ Accordion */
.faq-accordion {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-pale-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  background: var(--color-white);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 18px 24px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-slate);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover {
  background-color: var(--color-pale-bg);
  color: var(--color-copper);
}

.faq-icon {
  font-size: 18px;
  color: var(--color-copper);
  transition: transform 0.25s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  background: var(--color-white);
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Article Template Styles */
.article-header {
  padding: 56px 0 36px;
  border-bottom: 1px solid var(--color-pale-border);
  background: var(--color-white);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--color-text-muted);
}

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

.breadcrumb-sep {
  color: var(--color-pale-border);
}

.article-header h1 {
  font-size: 42px;
  margin-bottom: 16px;
}

.article-meta-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 13px;
  color: var(--color-text-muted);
}

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

.article-body {
  font-size: 17px;
  line-height: 1.85;
  color: var(--color-text-main);
}

.article-body h2 {
  font-size: 28px;
  margin-top: 48px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-pale-border);
}

.article-body h3 {
  font-size: 22px;
  margin-top: 32px;
  margin-bottom: 14px;
}

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 28px;
}

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

.article-body blockquote {
  border-left: 4px solid var(--color-copper);
  padding: 14px 20px;
  background-color: var(--color-pale-bg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: var(--color-slate);
  font-style: italic;
}

.article-callout {
  background: var(--color-pale-bg);
  border: 1px solid var(--color-pale-border);
  border-left: 4px solid var(--color-copper);
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  margin: 28px 0;
}

.article-callout-title {
  font-weight: 700;
  color: var(--color-slate);
  margin-bottom: 8px;
}

.article-cta-box {
  background: var(--color-slate);
  color: var(--color-white);
  padding: 32px;
  border-radius: var(--radius-md);
  margin: 40px 0;
  text-align: center;
}

.article-cta-box h3 {
  color: var(--color-white);
  margin-bottom: 10px;
}

.article-cta-box p {
  color: var(--color-text-dim-on-dark);
  max-width: 600px;
  margin: 0 auto 20px;
}

.related-articles-section {
  padding: 40px 0;
  background: var(--color-pale-bg);
  border-top: 1px solid var(--color-pale-border);
}

/* Footer */
.site-footer {
  background-color: var(--color-slate);
  color: var(--color-text-dim-on-dark);
  padding-top: 64px;
  padding-bottom: 40px;
  border-top: 1px solid var(--color-slate-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand h4 {
  color: var(--color-white);
  font-size: 20px;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h5 {
  color: var(--color-white);
  font-size: 16px;
  margin-bottom: 18px;
  font-family: var(--font-heading);
}

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

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

.footer-links a {
  color: var(--color-text-dim-on-dark);
  font-size: 14px;
}

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

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--color-slate-border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
}

.footer-external-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 8px;
}

.footer-external-links a {
  color: var(--color-copper);
}

.footer-external-links a:hover {
  color: var(--color-white);
}

/* ==========================================================================
   Responsive Breakpoints:
   Mobile: 375px, 390px, 430px
   Tablet: 768px
   Small Desktop: 1024px
   Desktop: 1440px
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: var(--h1-mobile);
  }

  h2 {
    font-size: 26px;
  }

  .nav-links, .header-actions .btn {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }

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

  .nodes-editorial-wrap {
    grid-template-columns: 1fr;
  }

  .scenarios-grid {
    grid-template-columns: 1fr;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-external-links {
    justify-content: center;
  }
}

@media (max-width: 430px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }

  .hero-ctas .btn {
    width: 100%;
  }
}