/* ==========================================================================
   山水云 (ishanshuiyun.lol) — Cyber-Telemetry Command Cockpit UI
   Theme: Carbon Cockpit (#090B0E) / Panel Slate (#12161C) / Acid Volt (#D8F044)
          Telemetry Cyan (#00E5FF) / Signal Coral (#FF4D38)
   Layout Paradigm: Fixed Desktop Left-Rail Command Sidebar (.cockpit-shell)
   ========================================================================== */

:root {
  --bg-main: #090B0E;
  --bg-card: #12161C;
  --bg-elevated: #191F28;
  --bg-glass: rgba(18, 22, 28, 0.88);
  --text-main: #F0F5FA;
  --text-muted: #8B9BB0;
  --text-dim: #5A697D;
  --highlight: #D8F044;
  --telemetry-cyan: #00E5FF;
  --accent: #FF4D38;
  --status-green: #18E68C;
  --border-line: #1E2633;
  --border-strong: #2C384B;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-display: "Bahnschrift", "DIN Alternate", "Arial Narrow", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", "Cascadia Mono", "Consolas", "PingFang SC", monospace;
  --rail-width: 250px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background-color: var(--bg-main);
  color: var(--text-main);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  background-image:
    radial-gradient(circle at 18% 10%, rgba(0, 229, 255, 0.045) 0%, transparent 40%),
    radial-gradient(circle at 85% 22%, rgba(216, 240, 68, 0.04) 0%, transparent 42%),
    linear-gradient(rgba(30, 38, 51, 0.25) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 38, 51, 0.25) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 36px 36px, 36px 36px;
  color: var(--text-main);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
}

a {
  color: var(--telemetry-cyan);
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

a:hover {
  color: var(--highlight);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--highlight);
  outline-offset: 2px;
}

/* ==========================================================================
   1. COCKPIT APP-SHELL & FIXED LEFT-RAIL SIDEBAR (NO TOP HORIZONTAL NAV ON DESKTOP)
   ========================================================================== */
.cockpit-shell {
  display: grid;
  grid-template-columns: var(--rail-width) 1fr;
  min-height: 100vh;
  position: relative;
}

.cockpit-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-width);
  background: linear-gradient(180deg, #0D1117 0%, #090B0E 100%);
  border-right: 1px solid var(--border-strong);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 150;
  padding: 20px 16px;
  overflow-y: auto;
  box-shadow: 6px 0 28px rgba(0, 0, 0, 0.55);
}

.cockpit-rail__top {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cockpit-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-line);
  color: var(--text-main);
}

.cockpit-brand:hover {
  color: var(--highlight);
}

.cockpit-brand__emblem {
  width: 38px;
  height: 38px;
  background: var(--bg-card);
  border: 1px solid var(--highlight);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(216, 240, 68, 0.2);
}

.cockpit-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.cockpit-brand__cn {
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--text-main);
}

.cockpit-brand__en {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--telemetry-cyan);
  letter-spacing: 0.08em;
}

/* Live Telemetry Status & Clock Box in Sidebar */
.cockpit-telemetry-box {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--status-green);
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cockpit-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--status-green);
  font-weight: 700;
}

.status-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--status-green);
  display: inline-block;
  box-shadow: 0 0 8px var(--status-green);
  animation: radarPulse 1.8s infinite ease-in-out;
}

@keyframes radarPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.25); }
}

.cockpit-clock-row {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
  border-top: 1px dashed var(--border-line);
  padding-top: 6px;
}

.cockpit-clock-val {
  color: var(--text-main);
  font-weight: 700;
}

.cockpit-sla-meter {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cockpit-sla-meter__label {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.cockpit-sla-meter__bar {
  height: 5px;
  background: #090B0E;
  border: 1px solid var(--border-line);
  overflow: hidden;
}

.cockpit-sla-meter__fill {
  height: 100%;
  width: 96%;
  background: linear-gradient(90deg, var(--telemetry-cyan), var(--highlight));
}

/* Vertical Radar Navigation Menu */
.cockpit-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.cockpit-nav__heading {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0 6px 4px;
}

.cockpit-nav__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 10px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  color: var(--text-muted);
  border: 1px solid transparent;
  border-left: 3px solid transparent;
  background: transparent;
  transition: all 0.16s ease;
}

.cockpit-nav__code {
  color: var(--telemetry-cyan);
  font-weight: 700;
  font-size: 0.76rem;
  flex-shrink: 0;
}

.cockpit-nav__link:hover,
.cockpit-nav__link.is-active {
  background: var(--bg-elevated);
  color: var(--text-main);
  border-color: var(--border-strong);
  border-left-color: var(--highlight);
}

.cockpit-nav__link.is-active .cockpit-nav__code {
  color: var(--highlight);
}

/* Bottom Docked Glowing CTA Module in Rail */
.cockpit-rail__bottom {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-line);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cockpit-dock-card {
  background: linear-gradient(145deg, #161C25 0%, #10141B 100%);
  border: 1px solid var(--border-strong);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cockpit-dock-card__tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--highlight);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cockpit-dock-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 10px 14px;
  background: var(--highlight);
  color: #090B0E !important;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 0.88rem;
  border: 1px solid var(--highlight);
  box-shadow: 0 0 18px rgba(216, 240, 68, 0.28);
  text-align: center;
  cursor: pointer;
}

.cockpit-dock-cta:hover {
  background: #E5FA64;
  box-shadow: 0 0 24px rgba(216, 240, 68, 0.5);
  transform: translateY(-1px);
}

/* Mobile Top HUD Bar (Hidden on Desktop >=960px) */
.cockpit-mobile-hud {
  display: none;
  position: sticky;
  top: 0;
  z-index: 140;
  background: rgba(9, 11, 14, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-strong);
  padding: 0 16px;
  height: 60px;
  align-items: center;
  justify-content: space-between;
}

.cockpit-mobile-hud__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.15rem;
  color: var(--text-main);
}

.cockpit-mobile-hud__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cockpit-mobile-hud__toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--highlight);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 8px 12px;
  min-height: 40px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Main Content Stage inside Cockpit Shell */
.cockpit-stage {
  grid-column: 2;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   2. HERO: FULL-CANVAS RADAR COMMAND DECK + LIVE INTERACTIVE PING MATRIX
   ========================================================================== */
.radar-hero {
  padding: 28px 36px 48px;
  border-bottom: 1px solid var(--border-strong);
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 70% 0%, rgba(0, 229, 255, 0.08), transparent 60%),
    linear-gradient(180deg, rgba(18, 22, 28, 0.65) 0%, rgba(9, 11, 14, 0.95) 100%);
}

/* Top HUD Status Ribbon with Live Animated SVG Waveform */
.hud-ribbon {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--telemetry-cyan);
  padding: 10px 16px;
  margin-bottom: 28px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.hud-ribbon__left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.hud-ribbon__badge {
  background: rgba(0, 229, 255, 0.14);
  color: var(--telemetry-cyan);
  border: 1px solid rgba(0, 229, 255, 0.4);
  padding: 2px 8px;
  font-weight: 800;
  font-size: 0.75rem;
}

.hud-ribbon__wave {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--highlight);
}

.hud-waveform-svg {
  display: block;
}

.hud-waveform-path {
  stroke-dasharray: 180;
  stroke-dashoffset: 180;
  animation: dashWave 3.5s linear infinite;
}

@keyframes dashWave {
  0% { stroke-dashoffset: 180; }
  50% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -180; }
}

/* Command Deck Header Block */
.radar-hero__deck {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: end;
  margin-bottom: 32px;
}

.radar-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--highlight);
  letter-spacing: 0.06em;
  margin-bottom: 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.radar-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.2vw, 2.75rem);
  line-height: 1.18;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}

.radar-hero__subtitle {
  font-size: 1.02rem;
  color: var(--text-muted);
  max-width: 680px;
}

.radar-hero__cta-cluster {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.radar-hero__btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Tactical Buttons */
.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 24px;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.94rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.btn-action--primary {
  background: var(--highlight);
  color: #090B0E !important;
  border-color: var(--highlight);
  box-shadow: 4px 4px 0 var(--accent);
}

.btn-action--primary:hover {
  background: #E6FB60;
  color: #090B0E !important;
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--telemetry-cyan);
}

.btn-action--secondary {
  background: var(--bg-card);
  color: var(--text-main) !important;
  border-color: var(--border-strong);
}

.btn-action--secondary:hover {
  border-color: var(--telemetry-cyan);
  color: var(--telemetry-cyan) !important;
}

.btn-action--telemetry {
  background: rgba(0, 229, 255, 0.12);
  color: var(--telemetry-cyan);
  border: 1px solid var(--telemetry-cyan);
  padding: 8px 18px;
  min-height: 40px;
  font-size: 0.84rem;
}

.btn-action--telemetry:hover {
  background: var(--telemetry-cyan);
  color: #090B0E;
}

/* Full-Width Interactive 6-Node Ping & Telemetry Matrix */
.ping-matrix-console {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-top: 3px solid var(--highlight);
  padding: 22px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
}

.ping-matrix-console__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border-line);
}

.ping-matrix-console__title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.ping-matrix-console__controls {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.ping-summary-stat {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.ping-summary-stat strong {
  color: var(--status-green);
}

.ping-nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.ping-node-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  transition: border-color 0.2s ease, transform 0.15s ease;
}

.ping-node-card:hover {
  border-color: var(--telemetry-cyan);
}

.ping-node-card.is-sweeping {
  border-color: var(--highlight);
  box-shadow: inset 0 0 18px rgba(216, 240, 68, 0.14);
}

.ping-node-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.ping-node-card__code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 2px 6px;
  background: #090B0E;
  color: var(--telemetry-cyan);
  border: 1px solid var(--border-strong);
  font-weight: 700;
}

.ping-node-card__loss {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--status-green);
}

.ping-node-card__name {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--text-main);
}

.ping-node-card__metrics {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-family: var(--font-mono);
}

.ping-node-card__rtt {
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--highlight);
}

.ping-node-card__jitter {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.ping-node-card__meter {
  height: 6px;
  background: #090B0E;
  border: 1px solid var(--border-line);
  overflow: hidden;
}

.ping-node-card__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--status-green), var(--highlight));
  transition: width 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ==========================================================================
   COMMON SECTION SHELL INSIDE COCKPIT STAGE
   ========================================================================== */
.cockpit-section {
  padding: 56px 36px;
  border-bottom: 1px solid var(--border-strong);
  position: relative;
}

.cockpit-section--alt {
  background: rgba(18, 22, 28, 0.55);
}

.section-hud-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--border-line);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.section-hud-bar__id {
  color: var(--highlight);
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.section-hud-bar__id::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--accent);
  display: inline-block;
}

.section-head {
  margin-bottom: 32px;
  max-width: 820px;
}

.section-head__title {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.5vw, 2.15rem);
  line-height: 1.24;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 10px;
}

.section-head__desc {
  color: var(--text-muted);
  font-size: 0.98rem;
}

/* ==========================================================================
   3. SECTION 1 (RIGHT AFTER HERO): INTERACTIVE BANDWIDTH ESTIMATOR + BLADE PRICING
   ========================================================================== */
.bandwidth-estimator {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--highlight);
  padding: 24px;
  margin-bottom: 28px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: center;
}

.bandwidth-estimator__control {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bandwidth-estimator__label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-mono);
}

.bandwidth-estimator__prompt {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
}

.bandwidth-estimator__value {
  font-size: 1.65rem;
  font-weight: 900;
  color: var(--highlight);
}

.cockpit-range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 10px;
  background: #090B0E;
  border: 1px solid var(--border-strong);
  outline: none;
  cursor: pointer;
}

.cockpit-range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  background: var(--highlight);
  border: 2px solid #090B0E;
  box-shadow: 0 0 10px var(--highlight);
  cursor: pointer;
}

.cockpit-range-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  background: var(--highlight);
  border: 2px solid #090B0E;
  box-shadow: 0 0 10px var(--highlight);
  cursor: pointer;
}

.bandwidth-estimator__scale {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-dim);
}

.bandwidth-estimator__readout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.estimator-pill {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  padding: 12px 10px;
  text-align: center;
  font-family: var(--font-mono);
}

.estimator-pill__num {
  display: block;
  font-size: 1.18rem;
  font-weight: 900;
  color: var(--telemetry-cyan);
  margin-bottom: 2px;
}

.estimator-pill__unit {
  font-size: 0.74rem;
  color: var(--text-muted);
}

/* Hardware Server Blade Pricing Grid */
.blade-pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: stretch;
}

.blade-card {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.2s ease;
}

.blade-card.is-recommended {
  background: linear-gradient(180deg, #18202B 0%, #12161C 100%);
  border: 2px solid var(--highlight);
  box-shadow: 0 0 28px rgba(216, 240, 68, 0.16);
  transform: translateY(-4px);
}

.blade-card__slot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.blade-card__rec-badge {
  background: var(--highlight);
  color: #090B0E;
  font-weight: 900;
  padding: 2px 8px;
  font-size: 0.72rem;
}

.blade-card__name {
  font-family: var(--font-display);
  font-size: 1.38rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 8px;
}

.blade-card__price-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-line);
}

.blade-card__price {
  font-family: var(--font-display);
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--highlight);
}

.blade-card__cycle {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--text-muted);
}

.blade-card__specs {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  font-size: 0.92rem;
}

.blade-card__specs li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--text-main);
}

.blade-card__specs li::before {
  content: "▸";
  font-family: var(--font-mono);
  color: var(--telemetry-cyan);
  font-weight: 900;
}

/* ==========================================================================
   4. SECTION 2: INTERACTIVE 3-MODE PROTOCOL & ROUTING TOPOLOGY SWITCHER
   ========================================================================== */
.topology-console {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 24px;
}

.topology-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.topology-tab {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 0.16s ease;
}

.topology-tab__code {
  font-size: 0.72rem;
  color: var(--telemetry-cyan);
}

.topology-tab[aria-selected="true"] {
  background: rgba(216, 240, 68, 0.1);
  border-color: var(--highlight);
  color: var(--text-main);
  box-shadow: inset 0 3px 0 var(--highlight);
}

.topology-tab[aria-selected="true"] .topology-tab__code {
  color: var(--highlight);
}

.topology-stage {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 24px;
  align-items: center;
}

.topology-diagram-box {
  background: #090B0E;
  border: 1px solid var(--border-strong);
  padding: 16px;
}

.topology-svg {
  width: 100%;
  height: auto;
  display: block;
}

.topology-info-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.topology-info-box__badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  background: rgba(0, 229, 255, 0.12);
  color: var(--telemetry-cyan);
  border: 1px solid var(--telemetry-cyan);
  padding: 3px 10px;
}

.topology-info-box__title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-main);
}

.topology-info-box__desc {
  font-size: 0.94rem;
  color: var(--text-muted);
}

.topology-kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 4px;
}

.topology-kpi {
  background: var(--bg-elevated);
  border: 1px solid var(--border-line);
  padding: 10px 12px;
  font-family: var(--font-mono);
}

.topology-kpi__label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.topology-kpi__val {
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--highlight);
}

/* ==========================================================================
   5. SECTION 3: UNIFIED 12-NODE DIAGNOSTIC UNLOCK BOARD (STREAMING & AI)
   ========================================================================== */
.unlock-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.unlock-filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 8px 16px;
  cursor: pointer;
}

.unlock-filter-btn.is-active {
  background: var(--highlight);
  color: #090B0E;
  border-color: var(--highlight);
}

.diagnostic-board-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.diag-node {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  transition: border-color 0.15s ease;
}

.diag-node:hover {
  border-color: var(--highlight);
}

.diag-node[hidden] {
  display: none;
}

.diag-node__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.diag-node__led {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--status-green);
}

.diag-node__region {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--telemetry-cyan);
  background: #090B0E;
  padding: 2px 6px;
  border: 1px solid var(--border-line);
}

.diag-node__name {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--text-main);
}

.diag-node__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.diag-node__proto {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  border-top: 1px dashed var(--border-line);
  padding-top: 8px;
}

/* ==========================================================================
   6. SECTION 4: 4-QUADRANT 24-HOUR DUTY CYCLE TIMELINE SCENARIOS
   ========================================================================== */
.duty-cycle-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.duty-quadrant {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-top: 3px solid var(--telemetry-cyan);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
}

.duty-quadrant:nth-child(2n) {
  border-top-color: var(--highlight);
}

.duty-quadrant__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.duty-quadrant__time {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 900;
  background: var(--highlight);
  color: #090B0E;
  padding: 3px 10px;
}

.duty-quadrant__route {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--telemetry-cyan);
}

.duty-quadrant__title {
  font-family: var(--font-display);
  font-size: 1.24rem;
  font-weight: 900;
  color: var(--text-main);
}

.duty-quadrant__desc {
  font-size: 0.94rem;
  color: var(--text-muted);
}

.duty-quadrant__footer {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--border-line);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-dim);
}

/* ==========================================================================
   7. SECTION 5: CLI TERMINAL ACCORDION FAQ (#faq)
   ========================================================================== */
.cli-terminal-window {
  background: #07090C;
  border: 1px solid var(--border-strong);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.55);
  overflow: hidden;
}

.cli-terminal-window__bar {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-strong);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.cli-terminal-dots {
  display: flex;
  gap: 8px;
}

.cli-terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.cli-terminal-dot--red { background: var(--accent); }
.cli-terminal-dot--yellow { background: var(--highlight); }
.cli-terminal-dot--green { background: var(--status-green); }

.cli-terminal-window__body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cli-prompt-banner {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--status-green);
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border-line);
}

.cli-faq-item,
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
}

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

.cli-faq-item__summary,
.faq-item__summary {
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.cli-faq-item__summary::-webkit-details-marker,
.faq-item__summary::-webkit-details-marker {
  display: none;
}

.cli-cmd-prefix {
  color: var(--telemetry-cyan);
  margin-right: 8px;
}

.cli-faq-item__indicator,
.faq-item__indicator {
  font-family: var(--font-mono);
  color: var(--highlight);
  font-weight: 900;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.cli-faq-item__answer,
.faq-item__answer {
  padding: 14px 20px 18px;
  border-top: 1px solid var(--border-line);
  color: var(--text-muted);
  font-size: 0.94rem;
  background: rgba(9, 11, 14, 0.7);
}

/* ==========================================================================
   8. TECHNICAL BLUEPRINT DOCS LIBRARY (zhinan.html) & SUBPAGE COMPATIBILITY
   ========================================================================== */
.guide-search-console {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 18px 20px;
  margin-bottom: 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.guide-search-input {
  flex: 1 1 280px;
  background: #090B0E;
  border: 1px solid var(--border-strong);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 10px 14px;
  min-height: 44px;
}

.guide-filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.guide-Grid,
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-top: 3px solid var(--telemetry-cyan);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  transition: border-color 0.16s ease, transform 0.16s ease;
}

.guide-card:hover {
  border-color: var(--highlight);
  transform: translateY(-2px);
}

.guide-card[hidden] {
  display: none;
}

.guide-card__thumb {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-line);
}

.guide-card__meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: right;
}

.guide-card__title {
  font-family: var(--font-display);
  font-size: 1.16rem;
  font-weight: 800;
  line-height: 1.38;
}

.guide-card__title a {
  color: var(--text-main);
}

.guide-card__title a:hover {
  color: var(--highlight);
}

.guide-card__summary {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.guide-card__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 800;
  color: var(--highlight);
}

/* Subpages Shared Header/Article/Breadcrumb/Footer Styles */
.pit-stripe-band {
  height: 4px;
  width: 100%;
  background: linear-gradient(90deg, var(--telemetry-cyan), var(--highlight), var(--accent));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 11, 14, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-strong);
}

.site-header__inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header__logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-header__link {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 8px;
}

.site-header__link:hover {
  color: var(--highlight);
}

.site-header__toggle {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 8px;
  color: var(--text-main);
  cursor: pointer;
}

.breadcrumb-bar {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 20px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-line);
}

.cockpit-stage .breadcrumb-bar {
  max-width: none;
  margin: 0;
  padding: 14px 36px;
}

.breadcrumb-bar__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.article-shell {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.article-header {
  border-bottom: 2px solid var(--telemetry-cyan);
  padding-bottom: 22px;
  margin-bottom: 30px;
}

.article-header__title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  line-height: 1.26;
  font-weight: 900;
  margin-bottom: 12px;
}

.article-header__meta {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  margin: 34px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-strong);
  color: var(--highlight);
}

.article-body h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 22px 0 10px;
  color: var(--telemetry-cyan);
}

.article-body p {
  margin-bottom: 16px;
  color: var(--text-main);
}

.article-body__lead {
  font-size: 1.03rem;
  background: var(--bg-card);
  border-left: 4px solid var(--highlight);
  padding: 16px 20px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-table-wrap {
  margin: 20px 0 24px;
  overflow-x: auto;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  font-size: 0.92rem;
}

.spec-table th,
.spec-table td {
  border: 1px solid var(--border-strong);
  padding: 12px 14px;
  text-align: left;
}

.spec-table th {
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  color: var(--highlight);
  font-weight: 700;
}

.code-block {
  font-family: var(--font-mono);
  background: #06080B;
  color: var(--highlight);
  border: 1px solid var(--border-strong);
  padding: 16px;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.55;
  margin: 18px 0 22px;
}

.article-cta-box,
.final-cta {
  margin: 36px 0;
  padding: 32px 28px;
  background: linear-gradient(135deg, #141922 0%, #0E1218 100%);
  border: 1px solid var(--border-strong);
  border-left: 6px solid var(--highlight);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.cockpit-stage .final-cta {
  margin: 36px;
}

.final-cta__title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.3vw, 1.85rem);
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 6px;
}

.final-cta__sub {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.article-related {
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--border-strong);
}

.article-related__list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 14px;
}

.article-related__link {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.article-related__link:hover {
  border-color: var(--highlight);
}

.faq-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-footer {
  background: #07090C;
  border-top: 1px solid var(--border-strong);
  padding: 0 0 72px;
}

.site-footer__inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 36px 36px 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.site-footer__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
}

.site-footer__disclosure {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
}

.site-footer__link {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 0.88rem;
}

.site-footer__link:hover {
  color: var(--highlight);
}

.site-footer__copy {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
}

.sticky-mobile-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 130;
  background: rgba(9, 11, 14, 0.96);
  padding: 10px 16px;
  border-top: 2px solid var(--highlight);
}

.sticky-mobile-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.sticky-mobile-bar__text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
}

/* ==========================================================================
   9. RESPONSIVE COLLAPSE (<960px Mobile HUD + Drawer)
   ========================================================================== */
@media (max-width: 1120px) {
  .diagnostic-board-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .radar-hero__deck,
  .bandwidth-estimator,
  .topology-stage {
    grid-template-columns: 1fr;
  }
  .radar-hero__cta-cluster {
    align-items: flex-start;
  }
}

@media (max-width: 960px) {
  .cockpit-shell {
    display: block;
  }
  .cockpit-mobile-hud {
    display: flex;
  }
  .cockpit-rail {
    transform: translateX(-105%);
    transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1);
    width: 270px;
  }
  .cockpit-rail.is-open {
    transform: translateX(0);
  }
  .cockpit-stage {
    grid-column: 1;
  }
  .radar-hero,
  .cockpit-section {
    padding: 32px 20px;
  }
  .ping-nodes-grid,
  .blade-pricing-grid,
  .topology-tabs,
  .diagnostic-board-grid,
  .duty-cycle-grid,
  .guide-grid,
  .article-related__list {
    grid-template-columns: 1fr;
  }
  .site-header__toggle {
    display: inline-flex;
  }
  .site-header__nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 2px solid var(--highlight);
    flex-direction: column;
    padding: 14px 20px;
    align-items: flex-start;
  }
  .site-header__nav--open {
    display: flex;
  }
}

@media (max-width: 720px) {
  .bandwidth-estimator__readout {
    grid-template-columns: 1fr;
  }
  .sticky-mobile-bar:not([hidden]) {
    display: block;
  }
  .spec-table, .spec-table tbody, .spec-table tr, .spec-table td {
    display: block;
    width: 100%;
  }
  .spec-table thead {
    display: none;
  }
  .spec-table tr {
    background: var(--bg-card);
    border: 1px solid var(--border-strong);
    border-left: 4px solid var(--highlight);
    margin-bottom: 14px;
    padding: 8px 12px;
  }
  .spec-table td {
    border: none;
    border-bottom: 1px solid var(--border-line);
    padding: 8px 4px;
  }
  .spec-table td:last-child {
    border-bottom: none;
  }
  .spec-table td::before {
    content: attr(data-label) "：";
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--highlight);
    display: block;
    font-size: 0.8rem;
    margin-bottom: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}