/* ==========================================================================
   急速云 (jisucloudvless.lol) — Exclusive VLESS Protocol Motorsport &
   Twin-Turbo Speedometer Lab Design System
   Palette:
   - Deep Obsidian Asphalt: #070A10
   - Carbon Fiber:          #111722
   - Carbon Elevated:       #161F2E
   - Electric Cyan:         #00F0FF
   - Nitro Volt:            #D9F044
   - Afterburner Magenta:   #FF2A6D
   ========================================================================== */

:root {
  --bg-page: #070A10;
  --bg-surface: #111722;
  --bg-elevated: #161F2E;
  --bg-glass: rgba(17, 23, 34, 0.84);
  --text-main: #F3F7FC;
  --text-muted: #8C9BAE;
  --accent-cyan: #00F0FF;
  --accent-volt: #D9F044;
  --accent-volt-hover: #EAFF66;
  --accent-magenta: #FF2A6D;
  --border-line: #1E293B;
  --border-glow: rgba(0, 240, 255, 0.32);
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --max-width: 1240px;
  --clip-angled: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  --clip-card: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-page);
  color: var(--text-main);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  background-image:
    radial-gradient(circle at 15% 12%, rgba(0, 240, 255, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 20%, rgba(255, 42, 109, 0.07) 0%, transparent 38%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.015) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.015) 50%, rgba(255, 255, 255, 0.015) 75%, transparent 75%, transparent);
  background-size: 100% 100%, 100% 100%, 32px 32px;
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
}

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

a:hover {
  color: var(--accent-volt);
}

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--accent-volt);
  color: #070A10;
  padding: 0.6rem 1.2rem;
  font-weight: 700;
  z-index: 9999;
}

.skip-link:focus {
  top: 1rem;
}

.layout-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   1. ANGLED HUD TELEMETRY TOP BAR & PROTOCOL TICKER
   ========================================================================== */

.hud-ticker {
  background: linear-gradient(90deg, #05070C 0%, #0D1420 50%, #05070C 100%);
  border-bottom: 1px solid rgba(0, 240, 255, 0.2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 0.45rem 0;
  position: relative;
  overflow: hidden;
}

.hud-ticker__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.hud-ticker__live {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.hud-ticker__pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-volt);
  box-shadow: 0 0 10px var(--accent-volt);
  animation: nitroPulse 1.4s infinite ease-in-out;
}

@keyframes nitroPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.45; }
}

.hud-ticker__metrics {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.hud-ticker__metric strong {
  color: var(--accent-volt);
  font-weight: 700;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(7, 10, 16, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0, 240, 255, 0.22);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.55);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 1.25rem;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.site-header__brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-volt) 100%);
  color: #070A10;
  font-weight: 900;
  font-size: 1.15rem;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.45);
}

.site-header__brand-sub {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.35);
  padding: 0.15rem 0.45rem;
  margin-left: 0.25rem;
}

.site-header__toggle {
  display: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-glow);
  color: var(--accent-cyan);
  padding: 0.5rem;
  cursor: pointer;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-header__menu {
  display: flex;
  align-items: center;
  list-style: none;
  background: rgba(17, 23, 34, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.35rem;
  clip-path: var(--clip-angled);
  gap: 0.25rem;
}

.site-header__link {
  display: inline-block;
  padding: 0.45rem 0.95rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 600;
  clip-path: var(--clip-angled);
  transition: all 0.2s ease;
}

.site-header__link:hover,
.site-header__link[aria-current="page"] {
  color: #070A10;
  background: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
}

.site-header__cta,
.btn-nitro {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(90deg, var(--accent-volt) 0%, #B8FF29 100%);
  color: #070A10 !important;
  font-weight: 800;
  font-size: 0.95rem;
  padding: 0.68rem 1.45rem;
  clip-path: var(--clip-angled);
  box-shadow: 0 0 22px rgba(217, 240, 68, 0.45);
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.site-header__cta:hover,
.btn-nitro:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(217, 240, 68, 0.75);
  background: linear-gradient(90deg, #EAFF66 0%, var(--accent-cyan) 100%);
}

.btn-cyber {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: rgba(0, 240, 255, 0.08);
  color: var(--accent-cyan) !important;
  border: 1px solid var(--accent-cyan);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.68rem 1.4rem;
  clip-path: var(--clip-angled);
}

.btn-cyber:hover {
  background: rgba(0, 240, 255, 0.2);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
}

/* ==========================================================================
   2. INVERTED HERO: LEFT TWIN-TURBO TACHOMETER / RIGHT KINETIC HEADLINE
   ========================================================================== */

.turbo-hero {
  position: relative;
  padding: 4rem 0 4.5rem;
  border-bottom: 1px solid var(--border-line);
  overflow: hidden;
}

.turbo-hero::before {
  content: "";
  position: absolute;
  top: -20%;
  left: -10%;
  width: 55%;
  height: 120%;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.12) 0%, transparent 65%);
  pointer-events: none;
}

.turbo-hero__grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 3.25rem;
  align-items: center;
}

/* Left Column: Twin-Turbo Tachometer Console */
.tachometer-console {
  background: linear-gradient(155deg, rgba(22, 31, 46, 0.96) 0%, rgba(11, 15, 24, 0.98) 100%);
  border: 1px solid rgba(0, 240, 255, 0.35);
  clip-path: var(--clip-card);
  padding: 1.75rem;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.65), inset 0 0 35px rgba(0, 240, 255, 0.06);
}

.tachometer-console__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 0.85rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.tachometer-console__tag {
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.tachometer-console__mode-badge {
  background: rgba(255, 42, 109, 0.16);
  color: var(--accent-magenta);
  border: 1px solid var(--accent-magenta);
  padding: 0.18rem 0.6rem;
  font-weight: 700;
}

.tachometer-dial-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0.5rem 0 1.25rem;
}

.tachometer-svg {
  width: 100%;
  max-width: 380px;
  height: auto;
  overflow: visible;
}

.tach-arc-bg {
  fill: none;
  stroke: #1E293B;
  stroke-width: 16;
  stroke-linecap: round;
}

.tach-arc-active {
  fill: none;
  stroke: url(#turboGrad);
  stroke-width: 16;
  stroke-linecap: round;
  stroke-dasharray: 440;
  stroke-dashoffset: 110;
  transition: stroke-dashoffset 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.5));
}

.tach-needle-group {
  transform-origin: 200px 190px;
  transform: rotate(35deg);
  transition: transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.tachometer-readout {
  text-align: center;
  margin-top: -2.2rem;
  position: relative;
  z-index: 2;
}

.tachometer-readout__speed {
  font-family: var(--font-mono);
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1;
  color: var(--accent-volt);
  text-shadow: 0 0 24px rgba(217, 240, 68, 0.55);
}

.tachometer-readout__unit {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

.tachometer-telemetry-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.telemetry-cell {
  background: rgba(7, 10, 16, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.65rem;
  text-align: center;
  clip-path: var(--clip-angled);
}

.telemetry-cell__label {
  display: block;
  font-size: 0.74rem;
  color: var(--text-muted);
}

.telemetry-cell__val {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 0.15rem;
}

/* Gear Shifter Controls */
.gear-shifter {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-top: 0.75rem;
}

.gear-btn {
  background: #0B101B;
  border: 1px solid #263449;
  color: var(--text-muted);
  padding: 0.75rem 0.5rem;
  cursor: pointer;
  font-family: var(--font-sans);
  text-align: left;
  clip-path: var(--clip-angled);
  transition: all 0.22s ease;
}

.gear-btn__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-bottom: 0.2rem;
}

.gear-btn__name {
  display: block;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--text-main);
}

.gear-btn__target {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.gear-btn:hover {
  border-color: var(--accent-cyan);
}

.gear-btn.is-active {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.18) 0%, rgba(217, 240, 68, 0.14) 100%);
  border-color: var(--accent-volt);
  box-shadow: 0 0 18px rgba(217, 240, 68, 0.28);
}

.gear-btn.is-active .gear-btn__num {
  color: var(--accent-volt);
}

/* Right Column: Kinetic Headline & Telemetry CTA */
.turbo-hero__content {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.turbo-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  align-self: flex-start;
  background: rgba(0, 240, 255, 0.1);
  border-left: 4px solid var(--accent-cyan);
  padding: 0.35rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 0.05em;
}

.turbo-hero__title {
  font-size: clamp(2rem, 3.6vw, 3.05rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

.turbo-hero__title span {
  background: linear-gradient(90deg, var(--accent-cyan) 0%, var(--accent-volt) 60%, var(--accent-magenta) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.turbo-hero__lead {
  font-size: 1.06rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.turbo-specs-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  list-style: none;
  margin: 0.25rem 0;
}

.turbo-specs-list li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.92rem;
  background: rgba(17, 23, 34, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 0.6rem 0.85rem;
  clip-path: var(--clip-angled);
}

.turbo-specs-list li strong {
  color: var(--accent-volt);
  font-family: var(--font-mono);
}

.turbo-hero__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.4rem;
}

/* ==========================================================================
   SECTION COMMON HEADER
   ========================================================================== */

.race-section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border-line);
  position: relative;
}

.race-section--alt {
  background: rgba(13, 19, 29, 0.65);
}

.race-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.race-header__tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-magenta);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.45rem;
}

.race-header__title {
  font-size: clamp(1.65rem, 2.8vw, 2.35rem);
  font-weight: 900;
  line-height: 1.25;
}

.race-header__desc {
  max-width: 540px;
  color: var(--text-muted);
  font-size: 0.98rem;
}

/* ==========================================================================
   SECTION 1: LIVE PEAK-HOUR SPEED COMPARISON BENCHMARK (#benchmark)
   ========================================================================== */

.benchmark-deck {
  background: var(--bg-surface);
  border: 1px solid rgba(0, 240, 255, 0.25);
  clip-path: var(--clip-card);
  padding: 2.25rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.benchmark-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 2rem;
}

.time-selector {
  display: inline-flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.time-btn {
  background: #0A0E17;
  border: 1px solid #263449;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.6rem 1.15rem;
  cursor: pointer;
  clip-path: var(--clip-angled);
  transition: all 0.2s ease;
}

.time-btn.is-active {
  background: var(--accent-magenta);
  color: #FFFFFF;
  border-color: var(--accent-magenta);
  box-shadow: 0 0 18px rgba(255, 42, 109, 0.45);
}

.benchmark-bars {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}

.bench-row {
  background: rgba(7, 10, 16, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 1.25rem 1.5rem;
  clip-path: var(--clip-angled);
}

.bench-row__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.65rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.bench-row__name {
  font-weight: 800;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.bench-row__stats {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  display: flex;
  gap: 1.2rem;
}

.bench-track {
  width: 100%;
  height: 22px;
  background: #0D131F;
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.bench-fill {
  height: 100%;
  transition: width 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
}

.bench-fill--public {
  background: linear-gradient(90deg, #64748B, #EF4444);
}

.bench-fill--bgp {
  background: linear-gradient(90deg, #0284C7, var(--accent-cyan));
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.45);
}

.bench-fill--iepl {
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-volt));
  box-shadow: 0 0 20px rgba(217, 240, 68, 0.55);
}

/* ==========================================================================
   SECTION 2: ALTERNATING DIAGONAL ZIG-ZAG FEATURE ROWS (#features)
   ========================================================================== */

.zigzag-stack {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

.zigzag-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  background: linear-gradient(135deg, rgba(17, 23, 34, 0.9) 0%, rgba(11, 16, 26, 0.9) 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  clip-path: var(--clip-card);
  padding: 2.5rem;
  position: relative;
}

.zigzag-row--reverse .zigzag-row__visual {
  order: 2;
}

.zigzag-row--reverse .zigzag-row__text {
  order: 1;
}

.zigzag-row__visual {
  background: #070A10;
  border: 1px solid rgba(0, 240, 255, 0.25);
  clip-path: var(--clip-angled);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
}

.zigzag-row__index {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-volt);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  display: block;
}

.zigzag-row__title {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 0.85rem;
  color: var(--text-main);
}

.zigzag-row__desc {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.zigzag-metrics {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  list-style: none;
}

.zigzag-metrics li {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  padding: 0.35rem 0.75rem;
}

/* ==========================================================================
   SECTION 3: 3D MOUSE-TILT PRICING PODIUM (#pricing)
   ========================================================================== */

.podium-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
  padding-top: 1.5rem;
}

.tilt-card {
  background: linear-gradient(165deg, #151E2E 0%, #0B101A 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  clip-path: var(--clip-card);
  padding: 2.2rem 1.85rem;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform-style: preserve-3d;
  transition: transform 0.15s ease-out, border-color 0.25s ease, box-shadow 0.25s ease;
  will-change: transform;
  overflow: hidden;
}

.tilt-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(420px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(0, 240, 255, 0.14), transparent 45%);
  pointer-events: none;
}

.tilt-card--champion {
  transform: translateY(-18px);
  border: 2px solid var(--accent-volt);
  box-shadow: 0 25px 60px rgba(217, 240, 68, 0.15);
  background: linear-gradient(165deg, #1A2538 0%, #0D1320 100%);
}

.tilt-card__ribbon {
  display: inline-block;
  align-self: flex-start;
  background: var(--accent-volt);
  color: #070A10;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 900;
  padding: 0.22rem 0.7rem;
  margin-bottom: 0.85rem;
  text-transform: uppercase;
}

.tilt-card__tier {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
}

.tilt-card__sub {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.tilt-card__price {
  margin: 1.5rem 0;
  padding: 1.1rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}

.tilt-card__amount {
  font-family: var(--font-mono);
  font-size: 2.75rem;
  font-weight: 900;
  color: var(--accent-cyan);
}

.tilt-card--champion .tilt-card__amount {
  color: var(--accent-volt);
}

.tilt-card__period {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.tilt-card__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.85rem;
}

.tilt-card__features li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.93rem;
  color: var(--text-main);
}

.tilt-card__features li::before {
  content: "⚡";
  color: var(--accent-volt);
  font-size: 0.85rem;
}

/* ==========================================================================
   SECTION 4: UNIFIED INTERACTIVE ECOSYSTEM WALL (#ecosystem)
   ========================================================================== */

.command-deck {
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  clip-path: var(--clip-card);
  padding: 2rem;
}

.deck-tabs {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 1.25rem;
}

.deck-tab {
  background: #0B101B;
  border: 1px solid #263449;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.75rem 1.35rem;
  cursor: pointer;
  clip-path: var(--clip-angled);
  transition: all 0.2s ease;
}

.deck-tab.is-active {
  background: var(--accent-cyan);
  color: #070A10;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

.deck-panel {
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.deck-panel.is-active {
  display: grid;
}

.eco-card {
  background: #090D15;
  border: 1px solid rgba(255, 255, 255, 0.07);
  padding: 1.4rem;
  clip-path: var(--clip-angled);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.eco-card__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.eco-card__title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
}

.eco-card__badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-volt);
  background: rgba(217, 240, 68, 0.12);
  border: 1px solid rgba(217, 240, 68, 0.35);
  padding: 0.15rem 0.5rem;
}

.eco-card__desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ==========================================================================
   SECTION 5: 60-SECOND PIT-STOP STEPPER + 2-COLUMN FAQ GRID (#faq)
   ========================================================================== */

.pitstop-timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.pitstop-step {
  background: linear-gradient(135deg, #121A28 0%, #0A0E17 100%);
  border: 1px solid rgba(0, 240, 255, 0.25);
  clip-path: var(--clip-angled);
  padding: 1.65rem;
  position: relative;
}

.pitstop-step__clock {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--accent-volt);
  margin-bottom: 0.5rem;
  display: inline-block;
}

.pitstop-step__title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 0.45rem;
}

.pitstop-step__desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.faq-two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.faq-card {
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.09);
  clip-path: var(--clip-angled);
  padding: 1.35rem 1.5rem;
}

.faq-card summary {
  font-weight: 800;
  font-size: 1.02rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  color: var(--text-main);
}

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

.faq-card summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-cyan);
}

.faq-card[open] summary::after {
  content: "−";
  color: var(--accent-volt);
}

.faq-card__body {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* ==========================================================================
   SUBPAGE & ENGINEERING MANUAL STYLES (zhinan.html & article pages)
   ========================================================================== */

.breadcrumb-bar {
  background: #0A0F18;
  border-bottom: 1px solid var(--border-line);
  padding: 0.85rem 0;
  font-size: 0.88rem;
}

.breadcrumb-bar__list {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  list-style: none;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.pit-manual-hero {
  background: linear-gradient(135deg, #131C2B 0%, #080C14 100%);
  border: 1px solid rgba(0, 240, 255, 0.3);
  clip-path: var(--clip-card);
  padding: 2.5rem;
  margin-bottom: 2.5rem;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 2rem;
  align-items: center;
}

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

.track-manual-card {
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.09);
  clip-path: var(--clip-angled);
  display: grid;
  grid-template-columns: 180px 1fr;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

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

.track-manual-card__thumb {
  background: #070A10;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.track-manual-card__body {
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.6rem;
}

.track-manual-card__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  display: flex;
  gap: 1rem;
}

.track-manual-card__title {
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.35;
}

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

.track-manual-card__title a:hover {
  color: var(--accent-volt);
}

.track-manual-card__excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Legacy & Subpage Compatibility Classes */
.section-block {
  padding: 4rem 0;
}

.section-block__header {
  margin-bottom: 2.5rem;
}

.section-block__title {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 0.6rem;
}

.section-block__desc {
  color: var(--text-muted);
}

.article-shell {
  padding: 3rem 0 4.5rem;
}

.article-shell__inner {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.09);
  clip-path: var(--clip-card);
  padding: 2.5rem;
}

.article-header {
  border-bottom: 1px solid var(--border-line);
  padding-bottom: 1.5rem;
  margin-bottom: 1.8rem;
}

.article-header__title {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 0.8rem;
}

.article-header__meta {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-cyan);
}

.article-figure {
  margin: 1.5rem 0 2rem;
  background: #070A10;
  border: 1px solid var(--border-line);
  padding: 1rem;
  text-align: center;
}

.article-content h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-volt);
  margin: 2rem 0 0.85rem;
}

.article-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin: 1.5rem 0 0.6rem;
}

.article-content p {
  margin-bottom: 1.1rem;
  color: var(--text-main);
}

.article-content ul,
.article-content ol {
  margin: 0.85rem 0 1.35rem 1.4rem;
  color: var(--text-muted);
}

.article-content li {
  margin-bottom: 0.55rem;
}

.article-box {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.1) 0%, rgba(217, 240, 68, 0.08) 100%);
  border: 1px solid var(--accent-cyan);
  clip-path: var(--clip-angled);
  padding: 1.75rem;
  margin: 2.25rem 0;
}

.article-box__title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent-volt) !important;
  margin-top: 0 !important;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-volt);
  color: #070A10 !important;
  font-weight: 800;
  padding: 0.65rem 1.4rem;
  clip-path: var(--clip-angled);
  margin-top: 0.75rem;
}

.article-related {
  border-top: 1px solid var(--border-line);
  padding-top: 1.5rem;
  margin-top: 2rem;
}

.article-related__list {
  list-style: none;
  margin-left: 0 !important;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cta-banner {
  padding: 3.5rem 0;
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.08), rgba(217, 240, 68, 0.08));
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
}

.cta-banner__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-footer {
  background: #04060A;
  border-top: 1px solid rgba(0, 240, 255, 0.2);
  padding: 3rem 0 5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.site-footer__nav {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  flex-wrap: wrap;
}

.site-footer__link {
  color: var(--text-muted);
}

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

.mobile-sticky {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 400;
  background: rgba(7, 10, 16, 0.95);
  border-top: 1px solid var(--accent-cyan);
  padding: 0.75rem 1rem;
  justify-content: space-between;
  align-items: center;
}

.mobile-sticky__btn {
  background: var(--accent-volt);
  color: #070A10 !important;
  font-weight: 800;
  padding: 0.45rem 1rem;
  clip-path: var(--clip-angled);
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

@media (max-width: 980px) {
  .turbo-hero__grid,
  .zigzag-row,
  .podium-grid,
  .deck-panel.is-active,
  .pitstop-timeline,
  .faq-two-col,
  .pit-manual-hero,
  .track-manual-grid {
    grid-template-columns: 1fr;
  }

  .zigzag-row--reverse .zigzag-row__visual {
    order: 1;
  }
  .zigzag-row--reverse .zigzag-row__text {
    order: 2;
  }

  .tilt-card--champion {
    transform: none;
  }

  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #070A10;
    border-bottom: 1px solid var(--accent-cyan);
    padding: 1rem 1.5rem;
    flex-direction: column;
    align-items: stretch;
  }

  .site-header__nav.is-open {
    display: flex;
  }

  .site-header__menu {
    flex-direction: column;
    align-items: stretch;
  }

  .mobile-sticky {
    display: flex;
  }
}

@media (max-width: 600px) {
  .track-manual-card {
    grid-template-columns: 1fr;
  }
  .gear-shifter,
  .turbo-specs-list {
    grid-template-columns: 1fr;
  }
}