/* ==========================================================================
   FastNode 机场网 (fastnode.homes) - Pure Native CSS Design System
   Zero JS dependencies · GPU-accelerated dynamic backdrop · Instant load
   ========================================================================== */

:root {
  --bg-deep: #040711;
  --bg-navy: #080f20;
  --surface-card: rgba(12, 20, 38, 0.84);
  --surface-card-strong: rgba(14, 24, 46, 0.94);
  --surface-elevated: rgba(20, 33, 61, 0.9);
  --border-subtle: rgba(56, 189, 248, 0.16);
  --border-bright: rgba(0, 229, 255, 0.45);
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --cyan: #00e5ff;
  --sky: #38bdf8;
  --emerald: #10b981;
  --amber: #f59e0b;
  --gradient-brand: linear-gradient(135deg, #00e5ff 0%, #22d3ee 48%, #10b981 100%);
  --gradient-card: linear-gradient(180deg, rgba(17, 28, 52, 0.92) 0%, rgba(9, 15, 30, 0.92) 100%);
  --shadow-card: 0 18px 44px -18px rgba(0, 0, 0, 0.72);
  --shadow-glow: 0 0 36px -8px rgba(0, 229, 255, 0.28);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --container-max: 1260px;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

img,
svg {
  display: block;
  max-width: 100%;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

/* --------------------------------------------------------------------------
   Pure CSS Dynamic Animated Background (背景要动态的)
   -------------------------------------------------------------------------- */
.bg-canvas {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(0, 229, 255, 0.12), transparent 65%),
    radial-gradient(ellipse 65% 50% at 85% 90%, rgba(16, 185, 129, 0.1), transparent 60%),
    linear-gradient(180deg, #040711 0%, #070d1d 55%, #040711 100%);
}

.bg-grid {
  position: absolute;
  inset: -120px;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.055) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 85% 75% at 50% 38%, #000 35%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 85% 75% at 50% 38%, #000 35%, transparent 100%);
  animation: gridDrift 26s linear infinite;
  will-change: transform;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  will-change: transform;
}

.bg-orb-1 {
  width: 540px;
  height: 540px;
  top: -120px;
  left: -80px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.22) 0%, rgba(0, 229, 255, 0) 70%);
  animation: orbFloatA 18s ease-in-out infinite alternate;
}

.bg-orb-2 {
  width: 620px;
  height: 620px;
  top: 22%;
  right: -140px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.19) 0%, rgba(16, 185, 129, 0) 70%);
  animation: orbFloatB 22s ease-in-out infinite alternate;
}

.bg-orb-3 {
  width: 480px;
  height: 480px;
  bottom: -140px;
  left: 28%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18) 0%, rgba(59, 130, 246, 0) 70%);
  animation: orbFloatC 20s ease-in-out infinite alternate;
}

.bg-streak {
  position: absolute;
  height: 1.5px;
  width: 240px;
  background: linear-gradient(90deg, transparent 0%, rgba(0, 229, 255, 0.85) 50%, transparent 100%);
  opacity: 0;
  will-change: transform, opacity;
}

.bg-streak-1 {
  top: 18%;
  left: -260px;
  animation: streakAcross 8s ease-in-out infinite;
}

.bg-streak-2 {
  top: 46%;
  left: -260px;
  width: 300px;
  background: linear-gradient(90deg, transparent 0%, rgba(16, 185, 129, 0.8) 50%, transparent 100%);
  animation: streakAcross 11s ease-in-out 2.5s infinite;
}

.bg-streak-3 {
  top: 76%;
  left: -260px;
  width: 200px;
  animation: streakAcross 9.5s ease-in-out 5s infinite;
}

@keyframes gridDrift {
  0% {
    transform: translate3d(0, 0, 0);
  }
  100% {
    transform: translate3d(64px, 64px, 0);
  }
}

@keyframes orbFloatA {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  100% {
    transform: translate3d(90px, 70px, 0) scale(1.12);
  }
}

@keyframes orbFloatB {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  100% {
    transform: translate3d(-110px, -60px, 0) scale(1.08);
  }
}

@keyframes orbFloatC {
  0% {
    transform: translate3d(0, 0, 0) scale(0.96);
  }
  100% {
    transform: translate3d(80px, -90px, 0) scale(1.1);
  }
}

@keyframes streakAcross {
  0% {
    transform: translate3d(0, 0, 0);
    opacity: 0;
  }
  18% {
    opacity: 0.75;
  }
  80% {
    opacity: 0.55;
  }
  100% {
    transform: translate3d(calc(100vw + 520px), 0, 0);
    opacity: 0;
  }
}

@keyframes pulseNode {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.65);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(16, 185, 129, 0);
  }
}

/* Pure CSS Lightning Storm & Electric Arcs */
.bg-flash-sky {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(560px 400px at 16% 18%, rgba(0, 229, 255, 0.26), transparent 70%),
    radial-gradient(580px 420px at 84% 24%, rgba(16, 185, 129, 0.22), transparent 72%),
    radial-gradient(500px 380px at 50% 80%, rgba(59, 130, 246, 0.2), transparent 72%);
  opacity: 0.15;
  animation: electricSkyFlash 4.8s ease-out infinite;
  will-change: opacity;
}

.bg-lightning {
  position: absolute;
  z-index: 2;
  overflow: visible;
  pointer-events: none;
  filter: drop-shadow(0 0 9px rgba(0, 229, 255, 0.95)) drop-shadow(0 0 24px rgba(16, 185, 129, 0.65));
  opacity: 0.35;
  will-change: opacity, transform;
}

.bg-lightning-1 {
  top: 4%;
  left: 3%;
  width: min(250px, 34vw);
  height: auto;
  animation: lightningArcA 4.8s linear -0.1s infinite;
}

.bg-lightning-2 {
  top: 7%;
  right: 3%;
  width: min(270px, 36vw);
  height: auto;
  animation: lightningArcB 6.0s linear -1.9s infinite;
}

.bg-lightning-3 {
  bottom: 5%;
  left: 40%;
  width: min(230px, 32vw);
  height: auto;
  animation: lightningArcC 6.8s linear -3.6s infinite;
}

.bg-lightning-4 {
  top: 44%;
  right: 2%;
  width: min(200px, 26vw);
  height: auto;
  animation: lightningArcB 5.8s linear -0.35s infinite;
}

.lightning-main {
  stroke: #e6fcff;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  stroke-dasharray: 260 60;
  stroke-dashoffset: 0;
  animation: lightningDraw 2.5s linear infinite;
}

.bg-lightning-2 .lightning-main {
  stroke: #a7f3d0;
  animation-duration: 2.9s;
}

.bg-lightning-3 .lightning-main,
.bg-lightning-4 .lightning-main {
  stroke: #bae6fd;
  animation-duration: 3.1s;
}

.lightning-fork {
  stroke: #00e5ff;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  opacity: 0.88;
}

@keyframes electricSkyFlash {
  0%, 100% { opacity: 0.08; }
  4% { opacity: 0.62; }
  8% { opacity: 0.16; }
  12% { opacity: 0.52; }
  24% { opacity: 0.1; }
  52% { opacity: 0.08; }
  56% { opacity: 0.5; }
  60% { opacity: 0.15; }
  64% { opacity: 0.42; }
  76% { opacity: 0.08; }
}

@keyframes lightningArcA {
  0%, 100% { opacity: 0.34; transform: scale(1); }
  3% { opacity: 1; transform: scale(1.02); }
  7% { opacity: 0.3; }
  11% { opacity: 0.98; }
  18% { opacity: 0.55; }
  30% { opacity: 0.34; transform: scale(1); }
}

@keyframes lightningArcB {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  28% { opacity: 0.3; }
  32% { opacity: 1; transform: scale(1.02); }
  36% { opacity: 0.28; }
  40% { opacity: 0.96; }
  48% { opacity: 0.52; }
  62% { opacity: 0.3; transform: scale(1); }
}

@keyframes lightningArcC {
  0%, 100% { opacity: 0.28; }
  55% { opacity: 0.28; }
  59% { opacity: 0.98; }
  63% { opacity: 0.26; }
  67% { opacity: 0.92; }
  78% { opacity: 0.36; }
}

@keyframes lightningDraw {
  0% { stroke-dashoffset: 320; }
  100% { stroke-dashoffset: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .bg-grid,
  .bg-orb,
  .bg-streak,
  .bg-flash-sky,
  .bg-lightning,
  .lightning-main,
  .status-dot {
    animation: none !important;
  }
}

/* --------------------------------------------------------------------------
   Layout Helpers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 84px 0;
  position: relative;
}

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

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.24);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #03111a;
  box-shadow: 0 10px 26px -8px rgba(0, 229, 255, 0.52);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px -6px rgba(0, 229, 255, 0.72);
}

.btn-secondary {
  background: rgba(15, 25, 48, 0.88);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover {
  border-color: var(--cyan);
  background: rgba(20, 34, 64, 0.96);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 14px;
  border-radius: 10px;
}

.btn-lg {
  padding: 15px 30px;
  font-size: 16px;
  border-radius: 14px;
}

.btn-block {
  width: 100%;
}

/* --------------------------------------------------------------------------
   Header & Top-Left Brand Logo (左上方Logo)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 9, 20, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 74px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-name span {
  color: var(--cyan);
}

.brand-domain {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-top: 2px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 6px 2px;
  position: relative;
}

.nav-link:hover {
  color: var(--cyan);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Pure CSS Mobile Nav Toggle */
.nav-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.nav-toggle-label {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: rgba(15, 25, 48, 0.8);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 20px;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  padding: 72px 0 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.34);
  color: #6ee7b7;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald);
  animation: pulseNode 2.2s ease-in-out infinite;
}

.hero-title {
  font-size: clamp(32px, 4.3vw, 50px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.hero-title .text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0 auto 28px;
  max-width: 760px;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-bottom: 32px;
}

.hero-trust-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.trust-stat-item {
  background: rgba(12, 20, 38, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.trust-stat-val {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1.2;
}

.trust-stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Hero Right Telemetry Card */
.telemetry-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-card), var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.telemetry-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
}

.telemetry-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.telemetry-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #6ee7b7;
  background: rgba(16, 185, 129, 0.14);
  border: 1px solid rgba(16, 185, 129, 0.35);
  padding: 3px 10px;
  border-radius: 999px;
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.node-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: 12px;
  background: rgba(6, 11, 24, 0.72);
  border: 1px solid rgba(56, 189, 248, 0.14);
}

.node-region {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.node-type {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: #34d399;
  background: rgba(16, 185, 129, 0.12);
  padding: 3px 9px;
  border-radius: 8px;
}

.telemetry-unlocks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.unlock-chip {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 5px 11px;
  border-radius: 8px;
}

/* --------------------------------------------------------------------------
   Features Grid
   -------------------------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-card);
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-bright);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.28);
  color: var(--cyan);
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Pricing Section — ALL PLANS IN ONE HORIZONTAL ROW (所有价格要同排)
   -------------------------------------------------------------------------- */
.pricing-scroll-hint {
  display: none;
  text-align: center;
  font-size: 13px;
  color: var(--cyan);
  margin-bottom: 12px;
}

.pricing-row-wrap {
  width: 100%;
}

.pricing-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
}

.plan-card {
  display: flex;
  flex-direction: column;
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.plan-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-bright);
}

.plan-card.plan-featured {
  border-color: var(--cyan);
  background: linear-gradient(180deg, rgba(13, 33, 58, 0.96) 0%, rgba(8, 16, 34, 0.96) 100%);
  box-shadow: var(--shadow-card), 0 0 42px -12px rgba(0, 229, 255, 0.42);
}

.plan-badge {
  position: absolute;
  top: -12px;
  right: 18px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--gradient-brand);
  color: #03111a;
  font-size: 12px;
  font-weight: 800;
}

.plan-tier {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.plan-name {
  font-size: 21px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 13px;
  color: var(--text-muted);
  min-height: 44px;
  margin-bottom: 18px;
}

.plan-price-box {
  padding: 16px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 18px;
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.plan-currency {
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
}

.plan-amount {
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 900;
  line-height: 1;
  color: var(--text-primary);
}

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

.plan-alt-cycle {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #6ee7b7;
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.check-icon {
  color: var(--emerald);
  font-weight: 900;
  flex-shrink: 0;
}

/* Comparison Matrix Table */
.compare-table-wrap {
  margin-top: 34px;
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 14px;
}

.compare-table th,
.compare-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(56, 189, 248, 0.12);
}

.compare-table th {
  background: rgba(0, 229, 255, 0.06);
  color: var(--text-primary);
  font-weight: 700;
}

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

.compare-table td {
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Global Nodes & Quick Steps
   -------------------------------------------------------------------------- */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 38px;
}

.region-card {
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
}

.region-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.region-name {
  font-size: 17px;
  font-weight: 700;
}

.region-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.1);
  padding: 3px 9px;
  border-radius: 6px;
}

.region-card p {
  font-size: 14px;
  color: var(--text-secondary);
}

.steps-bar {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.step-box {
  background: rgba(11, 21, 41, 0.85);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.step-num {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--gradient-brand);
  color: #03111a;
  font-family: var(--font-mono);
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-box h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.step-box p {
  font-size: 13.5px;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Articles Grid (8 Deep SEO Guides)
   -------------------------------------------------------------------------- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-card);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-bright);
}

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.article-tag {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.22);
  padding: 3px 9px;
  border-radius: 6px;
}

.article-read {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-muted);
}

.article-card h3 {
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.article-card p {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.65;
  flex-grow: 1;
  margin-bottom: 14px;
}

.article-more {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--cyan);
}

.articles-hub-cta {
  margin-top: 32px;
  text-align: center;
}

/* --------------------------------------------------------------------------
   External Ecosystem Links (做好外链)
   -------------------------------------------------------------------------- */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.external-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 18px;
}

.external-card:hover {
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.external-card strong {
  font-size: 15px;
  color: var(--text-primary);
  display: block;
  margin-bottom: 5px;
}

.external-card span {
  font-size: 12.5px;
  color: var(--text-muted);
  display: block;
  margin-bottom: 10px;
}

.external-arrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--emerald);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   Reviews Section (用户评价)
   -------------------------------------------------------------------------- */
.reviews-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-bottom: 34px;
  padding: 18px 26px;
  border-radius: var(--radius-md);
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
}

.rating-big {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 900;
  color: var(--cyan);
}

.rating-stars {
  color: #fbbf24;
  font-size: 18px;
  letter-spacing: 2px;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.review-card {
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.review-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.review-user strong {
  display: block;
  font-size: 15px;
  color: var(--text-primary);
}

.review-user span {
  font-size: 12px;
  color: var(--text-muted);
}

.review-stars {
  color: #fbbf24;
  font-size: 14px;
}

.review-body {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.72;
  flex-grow: 1;
}

.review-footer {
  font-family: var(--font-mono);
  font-size: 12px;
  color: #6ee7b7;
  padding-top: 10px;
  border-top: 1px solid rgba(56, 189, 248, 0.12);
}

/* --------------------------------------------------------------------------
   FAQ Accordion — Pure HTML5 <details> + CSS (常见问题)
   -------------------------------------------------------------------------- */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

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

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  content: "−";
  color: var(--emerald);
}

.faq-answer {
  padding: 0 22px 20px;
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.78;
  border-top: 1px solid rgba(56, 189, 248, 0.1);
  padding-top: 14px;
}

.faq-answer a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   Bottom CTA & Footer
   -------------------------------------------------------------------------- */
.cta-banner {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.14) 0%, rgba(16, 185, 129, 0.12) 100%);
  border: 1px solid var(--border-bright);
  border-radius: 24px;
  padding: 48px 36px;
  text-align: center;
  box-shadow: var(--shadow-glow);
}

.cta-banner h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-banner p {
  max-width: 660px;
  margin: 0 auto 26px;
  color: var(--text-secondary);
}

.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: rgba(3, 6, 15, 0.92);
  padding: 58px 0 32px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.2fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-links a {
  font-size: 13.5px;
  color: var(--text-muted);
}

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

.footer-desc {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer-bottom {
  padding-top: 22px;
  border-top: 1px solid rgba(56, 189, 248, 0.12);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Responsive Breakpoints
   -------------------------------------------------------------------------- */
@media (max-width: 1120px) {
  .articles-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .ecosystem-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .features-grid,
  .nodes-grid,
  .steps-bar,
  .reviews-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  /* Keep all 4 pricing cards in a single horizontal row on smaller screens */
  .pricing-scroll-hint {
    display: block;
  }
  .pricing-row-wrap {
    overflow-x: auto;
    padding-bottom: 12px;
    -webkit-overflow-scrolling: touch;
  }
  .pricing-row {
    min-width: 940px;
  }
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .nav-toggle-label {
    display: inline-flex;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 20px 24px;
    background: rgba(5, 9, 20, 0.97);
    border-bottom: 1px solid var(--border-subtle);
  }
  .nav-toggle-input:checked ~ .main-nav {
    display: flex;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 60px 0;
  }
  .hero-trust-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .features-grid,
  .nodes-grid,
  .steps-bar,
  .reviews-grid,
  .articles-grid,
  .ecosystem-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .header-actions .btn-sm {
    padding: 8px 12px;
    font-size: 13px;
  }
}