/* ==========================================================================
   WgetCloud 官方网络与节点推广平台 - 全局核心样式表
   Visual Style: Heritage Teal with Modern Information Layout
   Colors:
     - Ivory: #FBF8F1
     - Heritage Teal: #235C61
     - Dark Walnut: #342E2A
     - Muted Cream: #ECE4D5
   ========================================================================== */

:root {
  --color-ivory: #FBF8F1;
  --color-teal: #235C61;
  --color-teal-dark: #194448;
  --color-teal-light: #EBF2F1;
  --color-teal-subtle: rgba(35, 92, 97, 0.07);
  --color-walnut: #342E2A;
  --color-walnut-muted: #645D56;
  --color-cream: #ECE4D5;
  --color-cream-light: #F7F3EA;
  --color-cream-border: #DDD3C1;
  --color-white: #FFFFFF;
  --color-seal: #9B382F;
  --color-seal-bg: rgba(155, 56, 47, 0.08);

  /* Typography */
  --font-serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", "SimSun", "STSong", "Songti", Georgia, serif;
  --font-sans: -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", monospace;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 880px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-subtle: 0 2px 10px rgba(52, 46, 42, 0.04), 0 1px 3px rgba(52, 46, 42, 0.03);
  --shadow-card: 0 4px 16px rgba(35, 92, 97, 0.06), 0 1px 4px rgba(52, 46, 42, 0.04);
  --shadow-hover: 0 8px 24px rgba(35, 92, 97, 0.12), 0 2px 6px rgba(52, 46, 42, 0.06);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--color-ivory);
  color: var(--color-walnut);
}

body {
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.75;
  color: var(--color-walnut);
  background-color: var(--color-ivory);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Typography styles */
h1, h2, h3, h4, .serif-text {
  font-family: var(--font-serif);
  color: var(--color-walnut);
  font-weight: 700;
  line-height: 1.3;
  overflow-wrap: break-word;
  word-break: break-word;
}

h1 {
  font-size: 52px;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 32px;
  margin-bottom: 0.75rem;
}

h3 {
  font-size: 22px;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

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

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

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

/* Tabular Numerals */
.tabular-nums, .price-num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* Layout container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Decorative Framing for Major Headings */
.heading-frame {
  display: inline-block;
  position: relative;
  padding: 0.4rem 1.75rem;
  border-top: 1px solid var(--color-cream-border);
  border-bottom: 1px solid var(--color-cream-border);
}

.heading-frame::before {
  content: "";
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 0;
  width: 2px;
  background-color: var(--color-teal);
}

.heading-frame::after {
  content: "";
  position: absolute;
  top: 3px;
  bottom: 3px;
  right: 0;
  width: 2px;
  background-color: var(--color-teal);
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header p {
  color: var(--color-walnut-muted);
  font-size: 1.05rem;
  max-width: 680px;
  margin: 0.75rem auto 0;
}

.badge-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-teal);
  background: var(--color-cream-light);
  border: 1px solid var(--color-cream);
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.85rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  line-height: 1.4;
  text-align: center;
}

.btn-primary {
  background-color: var(--color-teal);
  color: var(--color-ivory);
  border-color: var(--color-teal);
}

.btn-primary:hover {
  background-color: var(--color-teal-dark);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(35, 92, 97, 0.25);
}

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

.btn-secondary:hover {
  background-color: var(--color-teal-subtle);
  color: var(--color-teal-dark);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.9rem;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* ==========================================================================
   Header & Mobile Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(251, 248, 241, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-cream);
  transition: background-color 0.2s ease;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-walnut);
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: var(--color-teal);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ivory);
  font-size: 1rem;
  font-weight: 800;
  flex-shrink: 0;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-desktop a {
  color: var(--color-walnut);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 0.25rem 0;
}

.nav-desktop a:hover {
  color: var(--color-teal);
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-teal);
  transition: width 0.2s ease;
}

.nav-desktop a:hover::after {
  width: 100%;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-cream-border);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-walnut);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background-color: var(--color-ivory);
  border-bottom: 2px solid var(--color-cream);
  padding: 1.5rem;
  box-shadow: 0 10px 25px rgba(52, 46, 42, 0.08);
  max-height: calc(100vh - 72px);
  overflow-y: auto;
  z-index: 999;
}

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

.mobile-menu-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.mobile-menu-links a {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-walnut);
  display: block;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--color-cream-light);
}

/* ==========================================================================
   Hero Section & Elegant Route Registry
   ========================================================================== */
.hero-section {
  padding: 4.5rem 0 5rem;
  background: radial-gradient(circle at 80% 20%, rgba(35, 92, 97, 0.05), transparent 45%),
              linear-gradient(180deg, var(--color-ivory) 0%, #FAF5EB 100%);
  border-bottom: 1px solid var(--color-cream);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.hero-copy h1 {
  line-height: 1.18;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-walnut-muted);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.hero-note {
  font-size: 0.875rem;
  color: var(--color-walnut-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Route Registry Dashboard */
.route-registry-card {
  background: var(--color-white);
  border: 1px solid var(--color-cream-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 1.85rem;
  position: relative;
  overflow: hidden;
}

.registry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  border-bottom: 1px solid var(--color-cream);
  padding-bottom: 1.1rem;
  margin-bottom: 1.25rem;
}

.registry-header-main {
  flex: 1;
  min-width: 0;
}

.registry-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-teal);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.registry-sub {
  font-size: 0.8125rem;
  color: var(--color-walnut-muted);
  margin-top: 0.35rem;
}

/* Animated Route Stamp (Single Occurrence - Non-overlapping) */
.route-stamp {
  flex-shrink: 0;
  border: 2px dashed var(--color-seal);
  background: var(--color-seal-bg);
  color: var(--color-seal);
  font-family: var(--font-serif);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.3rem 0.65rem;
  border-radius: 4px;
  text-transform: uppercase;
  transform: rotate(-5deg);
  opacity: 0.95;
  animation: stamp-in 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) 0.25s 1 forwards;
  pointer-events: none;
  white-space: nowrap;
}

@keyframes stamp-in {
  0% {
    opacity: 0;
    transform: rotate(12deg) scale(1.4);
  }
  100% {
    opacity: 0.95;
    transform: rotate(-5deg) scale(1);
  }
}

.registry-groups {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.registry-group {
  background: var(--color-cream-light);
  border: 1px solid var(--color-cream);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.group-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.group-flag {
  font-size: 1.25rem;
}

.group-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-walnut);
}

.group-code {
  font-size: 0.75rem;
  color: var(--color-walnut-muted);
  font-family: var(--font-mono);
}

.group-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-teal);
}

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

.registry-footer-note {
  font-size: 0.75rem;
  color: var(--color-walnut-muted);
  margin-top: 1rem;
  text-align: center;
  border-top: 1px dashed var(--color-cream);
  padding-top: 0.75rem;
}

/* ==========================================================================
   Section: Three Core Advantages (Alternating Open Layout)
   ========================================================================== */
.section-benefits {
  padding: 5rem 0;
  background-color: var(--color-ivory);
}

.benefit-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--color-cream);
}

.benefit-item:last-child {
  border-bottom: none;
}

.benefit-item.reverse {
  direction: rtl;
}

.benefit-item.reverse > * {
  direction: ltr;
}

.benefit-text {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.benefit-num {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-cream-border);
  line-height: 1;
}

.benefit-visual {
  background: var(--color-white);
  border: 1px solid var(--color-cream-border);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  box-shadow: var(--shadow-subtle);
  position: relative;
}

.benefit-visual-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--color-cream-light);
  font-size: 0.95rem;
}

.metric-row:last-child {
  border-bottom: none;
}

.metric-label {
  color: var(--color-walnut-muted);
}

.metric-val {
  font-weight: 600;
  color: var(--color-teal);
}

/* ==========================================================================
   Section: Global Nodes Index (Detailed & Readable Index)
   ========================================================================== */
.section-nodes {
  padding: 5rem 0;
  background-color: #FAF5EB;
  border-top: 1px solid var(--color-cream);
  border-bottom: 1px solid var(--color-cream);
}

.node-table-wrapper {
  background: var(--color-white);
  border: 1px solid var(--color-cream-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow-x: auto;
}

.node-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
}

.node-table th {
  background: var(--color-cream-light);
  color: var(--color-walnut);
  font-weight: 700;
  padding: 1rem 1.25rem;
  border-bottom: 2px solid var(--color-cream-border);
  font-family: var(--font-serif);
}

.node-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-cream);
  color: var(--color-walnut);
}

.node-table tr:last-child td {
  border-bottom: none;
}

.node-table tr:hover td {
  background-color: rgba(35, 92, 97, 0.02);
}

.tag-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--color-teal-light);
  color: var(--color-teal);
  font-weight: 600;
}

/* ==========================================================================
   Section: AI & Streaming Scenarios (Broad Two-Column Layout)
   ========================================================================== */
.section-scenarios {
  padding: 5rem 0;
  background-color: var(--color-ivory);
}

.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.scenario-card {
  background: var(--color-white);
  border: 1px solid var(--color-cream-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.scenario-header {
  border-bottom: 1px solid var(--color-cream);
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
}

.scenario-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0;
}

.scenario-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--color-cream-light);
  border: 1px solid var(--color-cream);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-walnut);
}

.scenario-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
  color: var(--color-walnut-muted);
}

.scenario-features li {
  position: relative;
  padding-left: 1.5rem;
}

.scenario-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-teal);
  font-weight: 700;
}

/* ==========================================================================
   Section: Pricing Plans (4 Distinct Tiers, One Recommended)
   ========================================================================== */
.section-pricing {
  padding: 5rem 0;
  background-color: #FAF5EB;
  border-top: 1px solid var(--color-cream);
  border-bottom: 1px solid var(--color-cream);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  align-items: stretch;
}

.plan-card {
  background: var(--color-white);
  border: 1px solid var(--color-cream-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.plan-card.recommended {
  border: 2px solid var(--color-teal);
  box-shadow: 0 6px 20px rgba(35, 92, 97, 0.15);
  background: #FCFDFD;
}

.recommended-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-teal);
  color: var(--color-ivory);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.2rem 1rem;
  border-radius: 999px;
  white-space: nowrap;
}

.plan-header {
  border-bottom: 1px solid var(--color-cream);
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  text-align: center;
}

.plan-name {
  font-size: 1.35rem;
  font-family: var(--font-serif);
  color: var(--color-walnut);
}

.plan-price-box {
  margin: 1rem 0 0.5rem;
}

.plan-price {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-teal);
  font-family: var(--font-serif);
}

.plan-period {
  font-size: 0.875rem;
  color: var(--color-walnut-muted);
}

.placeholder-pill {
  display: inline-block;
  font-size: 0.75rem;
  background: var(--color-cream-light);
  color: var(--color-walnut-muted);
  border: 1px dashed var(--color-cream-border);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-top: 0.25rem;
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
  flex-grow: 1;
  font-size: 0.9rem;
  color: var(--color-walnut-muted);
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.plan-features li span.check {
  color: var(--color-teal);
  font-weight: 700;
}

.pricing-disclaimer {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-walnut-muted);
  margin-top: 2rem;
}

/* ==========================================================================
   Section: SEO Journal Cards (3 / 2 / 1 Grid)
   ========================================================================== */
.section-articles {
  padding: 5rem 0;
  background-color: var(--color-ivory);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.journal-card {
  background: var(--color-white);
  border: 1px solid var(--color-cream-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

.journal-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-teal);
}

.journal-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--color-walnut-muted);
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-cream-light);
  padding-bottom: 0.5rem;
}

.journal-category {
  font-weight: 700;
  color: var(--color-teal);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.journal-title {
  font-size: 1.25rem;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.journal-title a {
  color: var(--color-walnut);
}

.journal-title a:hover {
  color: var(--color-teal);
}

.journal-excerpt {
  font-size: 0.9375rem;
  color: var(--color-walnut-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.journal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
  border-top: 1px dashed var(--color-cream);
  padding-top: 0.75rem;
}

.read-link {
  font-weight: 600;
  color: var(--color-teal);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* ==========================================================================
   Section: Testimonials (Authentic Sample Feedback)
   ========================================================================== */
.section-testimonials {
  padding: 5rem 0;
  background-color: #FAF5EB;
  border-top: 1px solid var(--color-cream);
  border-bottom: 1px solid var(--color-cream);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.testimonial-card {
  background: var(--color-white);
  border: 1px solid var(--color-cream-border);
  border-radius: var(--radius-md);
  padding: 1.85rem;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-quote {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-walnut);
  margin-bottom: 1.25rem;
  position: relative;
  font-style: normal;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-top: 1px solid var(--color-cream-light);
  padding-top: 0.85rem;
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-cream);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-teal);
  font-size: 0.9rem;
}

.author-meta {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-walnut);
}

.author-title {
  font-size: 0.75rem;
  color: var(--color-walnut-muted);
}

.testimonial-disclaimer {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-walnut-muted);
  margin-top: 1.75rem;
}

/* ==========================================================================
   Section: FAQ Accordion
   ========================================================================== */
.section-faq {
  padding: 5rem 0;
  background-color: var(--color-ivory);
}

.faq-list {
  max-width: var(--container-narrow);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-cream-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.25rem 1.5rem;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-walnut);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  gap: 1rem;
}

.faq-icon {
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-teal);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.5rem;
  font-size: 0.95rem;
  color: var(--color-walnut-muted);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 1.5rem 1.25rem 1.5rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: #2F2A26;
  color: #ECE4D5;
  padding: 4.5rem 0 2.5rem;
  border-top: 2px solid var(--color-teal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand h4 {
  color: #FBF8F1;
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.footer-desc {
  font-size: 0.9rem;
  color: #C7BEB3;
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.footer-col h5 {
  color: #FBF8F1;
  font-size: 1rem;
  font-family: var(--font-serif);
  margin-bottom: 1rem;
  border-bottom: 1px solid rgba(236, 228, 213, 0.15);
  padding-bottom: 0.5rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  font-size: 0.9rem;
}

.footer-links a {
  color: #D8CCC0;
}

.footer-links a:hover {
  color: #FBF8F1;
  text-decoration: underline;
}

/* External Recommendations in Footer */
.footer-external-links {
  margin-top: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(236, 228, 213, 0.15);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.875rem;
}

.footer-external-links span {
  color: #A99F95;
  font-weight: 600;
}

.footer-external-links a {
  color: #E2D7C5;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-external-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(236, 228, 213, 0.1);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: #A99F95;
}

/* ==========================================================================
   Article & Functional Page Inner Layouts
   ========================================================================== */
.page-header {
  padding: 3.5rem 0 2.5rem;
  background: linear-gradient(180deg, #FBF8F1 0%, #FAF5EB 100%);
  border-bottom: 1px solid var(--color-cream);
  text-align: center;
}

.breadcrumbs {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-walnut-muted);
  margin-bottom: 1.25rem;
  list-style: none;
}

.breadcrumbs li::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--color-cream-border);
}

.breadcrumbs li:last-child::after {
  content: "";
}

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

.article-content {
  padding: 3.5rem 0;
  background-color: var(--color-ivory);
}

.article-body {
  font-size: 1.125rem;
  line-height: 1.85;
  color: var(--color-walnut);
}

.article-body h2 {
  font-size: 1.75rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-cream);
  color: var(--color-teal-dark);
}

.article-body h3 {
  font-size: 1.35rem;
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.article-body ul, .article-body ol {
  margin: 1rem 0 1.5rem 1.75rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.callout-box {
  background: var(--color-white);
  border-left: 4px solid var(--color-teal);
  border-top: 1px solid var(--color-cream-border);
  border-right: 1px solid var(--color-cream-border);
  border-bottom: 1px solid var(--color-cream-border);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  font-size: 1rem;
}

.callout-box.warning {
  border-left-color: var(--color-seal);
}

.related-articles {
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 2px solid var(--color-cream);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 1.5rem;
}

/* ==========================================================================
   Responsive Adaptations (375, 390, 430, 768, 1024, 1440px)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 34px !important;
    line-height: 1.25 !important;
  }
  h2 {
    font-size: 26px !important;
  }
  body {
    font-size: 16px !important;
    line-height: 1.7 !important;
  }
  .nav-desktop {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .benefit-item, .benefit-item.reverse {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    direction: ltr !important;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .hero-section {
    padding: 3rem 0;
  }
  .section-benefits, .section-nodes, .section-scenarios, .section-pricing, .section-articles, .section-testimonials, .section-faq {
    padding: 3.5rem 0;
  }
  .registry-header {
    flex-wrap: wrap;
    gap: 0.85rem;
  }
  .route-stamp {
    align-self: flex-start;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .registry-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .route-stamp {
    animation: none !important;
    opacity: 0.95 !important;
    transform: rotate(-5deg) !important;
  }
}