:root {
  --brand: #863bff;
  --brand-2: #6b24d6;
  --accent: #47bfff;
  --accent-soft: rgba(71, 191, 255, 0.12);
  --bg: #f7f6fc;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-hover: #f3f0ff;
  --border: rgba(15, 18, 34, 0.08);
  --border-strong: rgba(134, 59, 255, 0.22);
  --text: #0f1222;
  --text-muted: #5c6378;
  --radius: 16px;
  --radius-sm: 10px;
  --font: 'Noto Sans SC', 'Instrument Sans', system-ui, sans-serif;
  --shadow: 0 20px 50px rgba(134, 59, 255, 0.1);
  --glow: 0 0 60px rgba(134, 59, 255, 0.12);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  width: min(1140px, calc(100% - 2rem));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Background */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
}

.orb-1 {
  width: 520px;
  height: 520px;
  top: -120px;
  right: -80px;
  background: radial-gradient(circle, rgba(134, 59, 255, 0.18) 0%, transparent 70%);
  opacity: 0.9;
}

.orb-2 {
  width: 400px;
  height: 400px;
  bottom: 10%;
  left: -100px;
  background: radial-gradient(circle, rgba(71, 191, 255, 0.14) 0%, transparent 70%);
  opacity: 0.85;
}

.grid-glow {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(134, 59, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(134, 59, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(247, 246, 252, 0.88);
  backdrop-filter: blur(16px) saturate(1.2);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.9rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(134, 59, 255, 0.25), rgba(71, 191, 255, 0.12));
  border: 1px solid var(--border-strong);
}

.brand-text {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.nav-desktop {
  display: flex;
  gap: 1.5rem;
  margin-left: auto;
}

.nav-desktop a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

.header-actions {
  display: flex;
  gap: 0.5rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem 1rem 1.25rem;
  border-top: 1px solid var(--border);
}

.nav-mobile a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
}

.nav-mobile[hidden] {
  display: none !important;
}

.nav-mobile.is-open {
  display: flex;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  box-shadow: 0 8px 28px rgba(134, 59, 255, 0.4);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: transparent;
}

.btn-ghost:hover {
  color: var(--text);
}

.btn-glass {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(15, 18, 34, 0.04);
}

.btn-glass:hover {
  background: var(--surface-hover);
  border-color: var(--border-strong);
}

.btn-lg {
  padding: 0.8rem 1.5rem;
  font-size: 0.95rem;
}

/* Hero */
.hero {
  padding: 4rem 0 2rem;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem 0.35rem 0.55rem;
  margin-bottom: 1.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand-2);
  background: #ede6ff;
  border: 1px solid rgba(134, 59, 255, 0.18);
  border-radius: 999px;
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2.25rem, 5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.headline-gradient {
  display: block;
  background: linear-gradient(120deg, var(--brand) 0%, #a78bfa 45%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  margin: 0 0 1.75rem;
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 32rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.hero-metrics {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.metric-value {
  display: block;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: -0.02em;
}

.metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.metric-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
}

/* Hero panel */
.panel-glass {
  background: linear-gradient(160deg, #ffffff 0%, #faf8ff 100%);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow), var(--glow);
  overflow: hidden;
}

.panel-glass .topology {
  overflow: visible;
}

.panel-top {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--border);
  background: #f3f1f8;
}

.traffic-light {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}

.traffic-light:nth-child(1) { background: #ff5f57; }
.traffic-light:nth-child(2) { background: #febc2e; }
.traffic-light:nth-child(3) { background: #28c840; }

.panel-title {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.topology {
  padding: 1.25rem 1rem 0.75rem;
  background: linear-gradient(160deg, #f8f6ff 0%, #eef8ff 100%);
}

.hero-topo-svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 148px;
  overflow: visible;
}

.link-flow--hero {
  stroke-width: 2.5;
}

.node--site .node-disk {
  color: var(--brand);
}

.node-name--hero {
  font-size: 10px;
}

.node-hint--hero {
  font-size: 8.5px;
}

.panel-feed {
  list-style: none;
  margin: 0;
  padding: 1rem 1.1rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 0.4rem;
}

.status-dot--ok { background: #34d399; box-shadow: 0 0 8px #34d399; }
.status-dot--warn { background: #fbbf24; }

/* Scenarios */
.scenarios {
  padding: 0 0 3rem;
}

.scenarios-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem 1rem;
}

.scenarios-row span {
  padding: 0.4rem 1rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
}

/* Use-case scenarios */
.topo-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

/* National cross-operator case */
.national-case {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 3rem;
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 24px;
  box-shadow: 0 20px 50px rgba(134, 59, 255, 0.08);
}

.national-badge {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.3rem 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #047857;
  background: linear-gradient(135deg, #ecfdf5, #e8f6ff);
  border: 1px solid rgba(52, 211, 153, 0.25);
  border-radius: 999px;
}

.national-case__copy h3 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.35rem, 2.5vw, 1.65rem);
  letter-spacing: -0.02em;
}

.national-lead {
  margin: 0 0 1.25rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.national-problems {
  margin: 0 0 1.25rem;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.55rem;
}

.national-problems li {
  padding: 0.55rem 0.75rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: #fef7f7;
  border: 1px solid rgba(225, 29, 72, 0.1);
  border-radius: 10px;
}

.national-problems strong {
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.78rem;
  color: #be123c;
}

.national-solutions {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.national-solutions li {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand-2);
  background: #ede6ff;
  border-radius: 999px;
}

.national-case__viz {
  margin: 0;
  padding: 0.5rem;
  background: linear-gradient(160deg, #f8fafc 0%, #f0fdf9 45%, #faf5ff 100%);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 16px;
}

.national-map-svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 280px;
  max-height: 420px;
  aspect-ratio: 4 / 3;
  border-radius: 12px;
  pointer-events: none;
  background: transparent;
}

.national-case__viz figcaption {
  margin: 0.75rem 0 0.25rem;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand-2);
  line-height: 1.5;
}

.scenario-divider {
  margin-bottom: 1.75rem;
  text-align: center;
}

.scenario-divider h3 {
  margin: 0 0 0.4rem;
  font-size: 1.2rem;
}

.scenario-divider p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.scenario-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(15, 18, 34, 0.04);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 24px 48px rgba(134, 59, 255, 0.12);
}

.scenario-card--wide {
  grid-column: 1 / -1;
}

.scenario-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
  padding: 0.3rem 0.7rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--brand-2);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(134, 59, 255, 0.15);
  border-radius: 999px;
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(134, 59, 255, 0.08);
}

.scenario-badge--blue {
  color: #0369a1;
  border-color: rgba(71, 191, 255, 0.25);
}

.scenario-canvas {
  position: relative;
  padding: 2.5rem 1rem 1.25rem;
  background:
    radial-gradient(ellipse 90% 70% at 50% 0%, rgba(134, 59, 255, 0.07), transparent 65%),
    linear-gradient(180deg, #faf9ff 0%, #f4f8ff 50%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
}

.scenario-canvas::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(134, 59, 255, 0.07) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0.5;
  pointer-events: none;
}

.scenario-canvas--wide {
  padding-inline: 0.5rem;
}

.scenario-svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 200px;
}

/* Links */
.link-track {
  fill: none;
  stroke: rgba(134, 59, 255, 0.1);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.link-flow {
  fill: none;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 14 10;
  animation: linkFlow 1.4s linear infinite;
}

@keyframes linkFlow {
  to {
    stroke-dashoffset: -48;
  }
}

.packet {
  filter: drop-shadow(0 0 8px rgba(134, 59, 255, 0.5));
}

.packet--blue {
  filter: drop-shadow(0 0 8px rgba(71, 191, 255, 0.5));
}

/* SVG nodes */
.node {
  filter: url(#node-shadow);
}

.node-ring {
  fill: none;
  stroke: rgba(134, 59, 255, 0.2);
  stroke-width: 2;
  stroke-dasharray: 4 6;
  animation: ringSpin 12s linear infinite;
}

.node--relay .node-ring,
.node--cloud .node-ring {
  stroke: rgba(134, 59, 255, 0.35);
}

.node--tunnel .node-ring {
  stroke: rgba(71, 191, 255, 0.35);
  stroke-dasharray: none;
}

.node--nas .node-ring {
  stroke: rgba(16, 185, 129, 0.35);
  stroke-dasharray: none;
}

.node-ring--pulse {
  animation: ringPulse 2.5s ease-in-out infinite;
}

@keyframes ringSpin {
  to {
    stroke-dashoffset: -40;
  }
}

@keyframes ringPulse {
  0%, 100% {
    stroke-opacity: 0.3;
  }
  50% {
    stroke-opacity: 0.75;
  }
}

.node-disk {
  fill: #ffffff;
  stroke: rgba(15, 18, 34, 0.06);
  stroke-width: 1;
}

.node--mobile .node-disk { color: #7c3aed; }
.node--relay .node-disk { color: #863bff; fill: #faf7ff; }
.node--tunnel .node-disk { color: #0284c7; fill: #f0f9ff; }
.node--home .node-disk { color: #863bff; }
.node--cloud .node-disk { color: #0284c7; fill: #f0f9ff; }
.node--nas .node-disk { color: #059669; fill: #ecfdf5; }

.node use {
  color: inherit;
}

.node-name {
  text-anchor: middle;
  font-family: var(--font);
  font-size: 11px;
  font-weight: 700;
  fill: #0f1222;
}

.node-hint {
  text-anchor: middle;
  font-family: var(--font);
  font-size: 9px;
  fill: #5c6378;
}

.node-tag {
  text-anchor: middle;
  font-family: var(--font);
  font-size: 8px;
  font-weight: 600;
  fill: #863bff;
}

.flow-caption {
  text-anchor: middle;
  font-family: var(--font);
  font-size: 11px;
  font-weight: 600;
  fill: var(--brand-2);
  letter-spacing: 0.02em;
}

.scenario-body {
  padding: 1.5rem 1.6rem 1.65rem;
}

.scenario-body--wide {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.25rem;
}

.scenario-body h3 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.scenario-desc {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 36rem;
}

.scenario-perks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.scenario-perks li {
  padding: 0.35rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--brand-2);
  background: linear-gradient(135deg, #f5f0ff, #eef8ff);
  border: 1px solid rgba(134, 59, 255, 0.12);
  border-radius: 999px;
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section--elevated {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.section-tag {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-head {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 3rem;
}

.section-head h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 3.5vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
}

/* Bento */
.bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.bento-card {
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.25s, transform 0.25s, background 0.25s;
}

.bento-card:hover {
  border-color: var(--border-strong);
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.bento-card--wide {
  grid-column: span 2;
}

.bento-card--tall {
  grid-row: span 2;
}

.bento-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  border-radius: 10px;
  background: #ede6ff;
  color: var(--brand);
}

.bento-icon svg {
  width: 22px;
  height: 22px;
}

.bento-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.bento-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Network */
.network-showcase {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.5rem;
  align-items: start;
}

.network-modes {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mode-card {
  padding: 1.35rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.mode-card:hover {
  border-color: var(--border-strong);
}

.mode-num {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--brand);
  margin-bottom: 0.35rem;
  letter-spacing: 0.08em;
}

.mode-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.mode-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.wizard-track {
  padding: 1.5rem;
  background: linear-gradient(180deg, #f5f0ff 0%, #eef8ff 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
}

.wizard-title {
  margin: 0 0 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.wizard-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.wizard-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 500;
  font-size: 0.92rem;
}

.wizard-list span {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  border-radius: 8px;
  color: #fff;
}

/* Monitor */
.monitor-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.monitor-card {
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.monitor-card h3 {
  margin: 0 0 1rem;
  font-size: 1.05rem;
}

.monitor-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.monitor-card li + li {
  margin-top: 0.35rem;
}

.monitor-card--highlight {
  position: relative;
  background: linear-gradient(145deg, #f5f0ff, #eef8ff);
  border-color: var(--border-strong);
}

.highlight-badge {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.2rem 0.55rem;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--brand-2);
  background: #ede6ff;
  border-radius: 6px;
}

.monitor-card--highlight p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* CTA */
.cta {
  padding: 2rem 0 5rem;
}

.cta-box {
  text-align: center;
  padding: 3.5rem 2rem;
  background: linear-gradient(135deg, #ede6ff 0%, #e8f6ff 100%);
  border: 1px solid var(--border-strong);
  border-radius: 24px;
  box-shadow: var(--glow);
}

.cta-box h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.cta-box > p {
  margin: 0 0 1.75rem;
  color: var(--text-muted);
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* FAQ */
.faq {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.2s;
}

.faq-item[open] {
  border-color: var(--border-strong);
}

.faq-item summary {
  padding: 1.1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  margin: 0;
  padding: 0 1.25rem 1.1rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* Footer */
.site-footer {
  padding: 3rem 0 1.5rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.footer-brand strong {
  display: block;
  font-size: 1.05rem;
}

.footer-brand p {
  margin: 0.25rem 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-nav {
  display: flex;
  gap: 3rem;
}

.footer-nav h4 {
  margin: 0 0 0.65rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-nav a {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  margin-bottom: 0.35rem;
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: var(--accent);
}

.footer-copy {
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-copy p {
  margin: 0;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-delay {
  transition-delay: 0.15s;
}

/* Responsive */
@media (max-width: 960px) {
  .hero-layout,
  .network-showcase,
  .bento,
  .monitor-cards,
  .scenario-grid,
  .national-case {
    grid-template-columns: 1fr;
  }

  .national-problems {
    grid-template-columns: 1fr;
  }

  .scenario-card--wide {
    grid-column: span 1;
  }

  .bento-card--wide,
  .bento-card--tall {
    grid-column: span 1;
    grid-row: span 1;
  }

  .nav-desktop,
  .header-actions .btn-ghost,
  .header-actions .btn-primary {
    display: none;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .header-actions {
    display: none;
  }

  .nav-mobile.is-open .btn {
    margin-top: 0.5rem;
  }
}

@media (max-width: 600px) {
  .hero-metrics {
    flex-direction: column;
    align-items: flex-start;
  }

  .metric-divider {
    display: none;
  }

  .footer-nav {
    flex-direction: column;
    gap: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .topo-path,
  .link-flow,
  .link-flow--hero,
  .node-ring {
    animation: none;
  }

  .packet {
    display: none;
  }

  .pill-dot {
    animation: none;
  }
}