/* ============================================
   OpenSparX — MasterAgent Website v3
   深炭黑底 + 暖琥珀/青色点缀
   ============================================ */

:root {
  --bg: #0c0c0b;
  --bg-elevated: #151513;
  --bg-card: #1a1a17;
  --bg-card-hover: #20201d;
  --border: #2a2a26;
  --border-strong: #3a3a34;

  --text-primary: #f5f4f0;
  --text-secondary: #a8a79f;
  --text-tertiary: #706f68;
  --text-muted: #52514b;

  --amber: #e8a94b;
  --amber-soft: rgba(232, 169, 75, 0.15);
  --amber-glow: rgba(232, 169, 75, 0.35);
  --cyan: #5ec8c0;
  --cyan-soft: rgba(94, 200, 192, 0.12);
  --cyan-glow: rgba(94, 200, 192, 0.3);

  --container: 1200px;
  --nav-height: 68px;
  --radius: 12px;
  --radius-lg: 20px;

  --easing: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.4s var(--easing);
}

/* Reset & Base */
* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  font-weight: 400;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(12, 12, 11, 0.7);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.nav.scrolled {
  border-bottom-color: var(--border);
  background: rgba(12, 12, 11, 0.85);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.nav-logo-img {
  height: 40px;
  width: auto;
  display: block;
}

.nav-logo-mark {
  color: var(--amber);
  font-size: 18px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s var(--easing);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--amber);
  transition: width 0.3s var(--easing);
}

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

.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-tertiary);
  transition: all 0.2s var(--easing);
  font-family: inherit;
}

.lang-switch:hover {
  border-color: var(--border-strong);
  color: var(--text-secondary);
}

.lang-option {
  padding: 2px 4px;
  border-radius: 4px;
  transition: all 0.2s var(--easing);
}

.lang-option.lang-active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

.lang-divider {
  color: var(--text-muted);
  font-size: 11px;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  transition: all 0.2s var(--easing);
}

.nav-cta:hover {
  border-color: var(--amber);
  color: var(--amber);
}

/* ============================================
   Hero
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + 40px) 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
}

.hero-glow-amber {
  width: 600px;
  height: 600px;
  background: var(--amber);
  top: -200px;
  right: -150px;
  opacity: 0.12;
}

.hero-glow-cyan {
  width: 500px;
  height: 500px;
  background: var(--cyan);
  bottom: -150px;
  left: -100px;
  opacity: 0.08;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--amber-soft);
  border: 1px solid rgba(232, 169, 75, 0.25);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--amber);
  margin-bottom: 28px;
  letter-spacing: 0.01em;
}

.hero-tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 8px var(--amber-glow);
  animation: pulse 2s ease-in-out infinite;
}

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

.hero-title {
  font-size: clamp(42px, 5.5vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-title-accent {
  background: linear-gradient(135deg, var(--amber) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(18px, 1.8vw, 22px);
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.hero-badges {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.badge {
  font-size: 13px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.badge-dot { color: var(--text-muted); }

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  transition: all 0.25s var(--easing);
  cursor: pointer;
  white-space: nowrap;
  letter-spacing: -0.005em;
}

.btn-primary {
  background: var(--amber);
  color: #1a1203;
  border: 1px solid var(--amber);
}

.btn-primary:hover {
  background: #f0b85a;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px -8px var(--amber-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.btn-ghost:hover {
  border-color: var(--text-primary);
  transform: translateY(-1px);
}

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

/* Hero Visual */
.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.chip-frame {
  position: relative;
  width: 340px;
  height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chip-glow {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.4;
  z-index: 0;
}

.chip-glow-amber {
  background: var(--amber);
  top: 20px;
  left: 30px;
}

.chip-glow-cyan {
  background: var(--cyan);
  bottom: 20px;
  right: 30px;
  opacity: 0.25;
}

.chip-core {
  position: relative;
  z-index: 1;
  width: 220px;
  height: 220px;
  background: linear-gradient(145deg, #1c1c19, #111110);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.03) inset,
    0 40px 80px -20px rgba(0,0,0,0.6);
}

.chip-core-inner {
  text-align: center;
  padding: 20px;
}

.chip-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 28px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.chip-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-tertiary);
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}

.chip-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  width: 120px;
  margin: 0 auto;
}

.chip-cell {
  width: 100%;
  aspect-ratio: 1;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 4px;
}

.chip-cell-active {
  background: var(--amber-soft);
  border-color: rgba(232, 169, 75, 0.3);
  animation: cellPulse 2.5s ease-in-out infinite;
}

.chip-cell-active:nth-child(5) { animation-delay: 0.5s; }
.chip-cell-active:nth-child(8) { animation-delay: 1s; }

@keyframes cellPulse {
  0%, 100% { background: var(--amber-soft); }
  50% { background: rgba(232, 169, 75, 0.3); }
}

.chip-pins {
  position: absolute;
  display: flex;
  gap: 10px;
}

.chip-pins-top,
.chip-pins-bottom {
  left: 50%;
  transform: translateX(-50%);
  flex-direction: row;
}

.chip-pins-left,
.chip-pins-right {
  top: 50%;
  transform: translateY(-50%);
  flex-direction: column;
}

.chip-pins-top { top: -10px; }
.chip-pins-bottom { bottom: -10px; }
.chip-pins-left { left: -10px; }
.chip-pins-right { right: -10px; }

.chip-pins::before {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  background: var(--border-strong);
  border-radius: 2px;
  box-shadow:
    18px 0 0 var(--border-strong),
    36px 0 0 var(--border-strong),
    54px 0 0 var(--border-strong),
    72px 0 0 var(--border-strong);
}

.chip-pins-left::before,
.chip-pins-right::before {
  box-shadow:
    0 18px 0 var(--border-strong),
    0 36px 0 var(--border-strong),
    0 54px 0 var(--border-strong),
    0 72px 0 var(--border-strong);
}

.chip-data {
  display: flex;
  gap: 32px;
  z-index: 1;
}

.chip-data-item {
  text-align: center;
}

.chip-data-value {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 20px;
  font-weight: 600;
  color: var(--amber);
  margin-bottom: 2px;
}

.chip-data-label {
  font-size: 11px;
  color: var(--text-tertiary);
  letter-spacing: 0.03em;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
}

.hero-scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-tertiary), transparent);
  position: relative;
  overflow: hidden;
}

.hero-scroll-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 8px;
  background: var(--amber);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { top: -8px; }
  100% { top: 40px; }
}

/* ============================================
   Position Bar
   ============================================ */
.position-bar {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
  background: var(--bg-elevated);
}

.position-bar-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}

.position-bar-brand {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.position-bar-sep {
  width: 1px;
  height: 16px;
  background: var(--border);
}

.position-bar-text {
  font-size: 15px;
  color: var(--text-secondary);
  letter-spacing: -0.005em;
}

.position-bar-logos {
  display: flex;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.partner-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  opacity: 0.75;
  transition: opacity 0.3s ease;
  height: 28px;
}

.partner-logo:hover {
  opacity: 1;
}

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

.partner-logo--qualcomm {
  height: 24px;
}

.partner-logo--nvidia {
  height: 24px;
}

/* ============================================
   Section Base
   ============================================ */
.section {
  padding: 140px 0;
  position: relative;
}

.section-header {
  max-width: 680px;
  margin-bottom: 72px;
}

.section-eyebrow {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--amber);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
  font-family: 'JetBrains Mono', monospace;
}

.section-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.section-pill {
  display: inline-block;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  background: rgba(232, 169, 75, 0.08);
  border: 1px solid rgba(232, 169, 75, 0.2);
  border-radius: 999px;
  margin-bottom: 20px;
  font-family: 'JetBrains Mono', monospace;
}

.toolchain-note {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-top: 20px;
  letter-spacing: 0.01em;
}

/* ============================================
   Why Section — Compare Table
   ============================================ */
.why { padding-top: 120px; }

.compare-table {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
}

.compare-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1.2fr;
  border-bottom: 1px solid var(--border);
}

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

.compare-row.compare-head {
  background: var(--bg-elevated);
}

.compare-cell {
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: 1px solid var(--border);
}

.compare-cell:first-child { border-left: none; }

.compare-label-cell {
  font-size: 14px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.compare-head .compare-cell {
  padding: 28px;
}

.compare-title-muted {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.compare-sub-muted {
  font-size: 13px;
  color: var(--text-muted);
}

.compare-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--amber);
  margin-bottom: 4px;
}

.compare-sub {
  font-size: 13px;
  color: var(--text-tertiary);
}

.compare-row:not(.compare-head) .compare-cell {
  font-size: 15px;
  color: var(--text-secondary);
}

.compare-highlight {
  background: rgba(232, 169, 75, 0.03);
}

.compare-row:not(.compare-head) .compare-highlight {
  color: var(--text-primary) !important;
  font-weight: 500;
}

/* ============================================
   Product — Principles
   ============================================ */
.product-name {
  background: linear-gradient(135deg, var(--amber) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: clamp(48px, 6vw, 72px);
  font-weight: 700;
  letter-spacing: -0.035em;
}

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

.principle-card {
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s var(--easing);
}

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

.principle-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--amber);
  margin-bottom: 20px;
  font-weight: 500;
}

.principle-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.015em;
}

.principle-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ============================================
   Architecture
   ============================================ */
.arch-stack {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-width: 900px;
  margin: 0 auto;
}

.arch-layer {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  padding: 28px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  align-items: center;
  transition: all 0.3s var(--easing);
}

.arch-layer:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

.arch-layer-top {
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.arch-layer-bottom {
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.arch-layer.arch-core {
  background: linear-gradient(135deg, rgba(232, 169, 75, 0.08), rgba(94, 200, 192, 0.06));
  border-color: rgba(232, 169, 75, 0.25);
}

.arch-layer-label {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.arch-layer-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.arch-layer-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.arch-layer-tag {
  font-size: 11px;
  font-weight: 500;
  color: var(--amber);
  background: var(--amber-soft);
  padding: 3px 10px;
  border-radius: 100px;
  letter-spacing: 0.02em;
}

.arch-layer-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.arch-chip {
  font-size: 13px;
  padding: 6px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.2s var(--easing);
}

.arch-chip:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text-primary);
}

.arch-chip-core {
  background: var(--amber-soft);
  border-color: rgba(232, 169, 75, 0.3);
  color: var(--amber);
}

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

.feature-card {
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s var(--easing);
}

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

.feature-card-wide {
  grid-column: span 3;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: start;
  background: linear-gradient(135deg, rgba(232, 169, 75, 0.06), rgba(94, 200, 192, 0.04));
  border-color: rgba(232, 169, 75, 0.2);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--amber-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber);
  margin-bottom: 24px;
  flex-shrink: 0;
}

.feature-card-wide .feature-icon {
  margin-bottom: 0;
  width: 56px;
  height: 56px;
}

.feature-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.015em;
}

.feature-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.feature-card-wide .feature-title {
  font-size: 20px;
  margin-bottom: 12px;
}

.feature-card-wide .feature-desc {
  font-size: 15px;
}

/* ============================================
   Performance
   ============================================ */
.perf-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.perf-card {
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s var(--easing);
}

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

.perf-value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
}

.perf-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 42px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1;
}

.perf-unit {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.perf-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-weight: 500;
}

.perf-bar {
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 12px;
}

.perf-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 1s var(--easing);
}

.perf-bar-amber { background: var(--amber); }
.perf-bar-cyan { background: var(--cyan); }

.perf-note {
  font-size: 12px;
  color: var(--text-tertiary);
  font-family: 'JetBrains Mono', monospace;
}

/* ============================================
   Developer Experience
   ============================================ */
.dev-exp-header {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 56px;
}

.dev-exp-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: var(--cyan-soft);
  border: 1px solid rgba(94, 200, 192, 0.25);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--cyan);
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.dev-exp-pill-dot { opacity: 0.6; }

.dev-exp-pill-en {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  opacity: 0.8;
}

.dev-exp-title {
  font-size: clamp(36px, 5vw, 56px);
  margin-bottom: 16px;
}

.code-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  max-width: 1100px;
  margin: 0 auto;
}

.code-window {
  background: #0e1014;
  border: 1px solid #1e242d;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.5);
  transition: transform 0.3s var(--easing), box-shadow 0.3s var(--easing);
}

.code-window:hover {
  transform: translateY(-4px);
  box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.6);
}

.code-window-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: #161a21;
  border-bottom: 1px solid #1e242d;
}

.code-window-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: block;
}

.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }
.dot-gray { background: #3a4150; }

.code-window-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: #6b7280;
  letter-spacing: 0.02em;
}

.code-window-body {
  padding: 24px 28px;
  overflow-x: auto;
  font-family: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', monospace;
  font-size: 13.5px;
  line-height: 1.75;
}

.code-window-body pre {
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  white-space: pre;
}

/* Terminal coloring */
.code-terminal { color: #c8d0d8; }

.term-prompt {
  color: var(--cyan);
  margin-right: 8px;
  font-weight: 500;
}

.term-cmd {
  color: #50d8c9;
  font-weight: 500;
}

.term-muted {
  color: #6b7280;
}

.term-check {
  color: #50d8c9;
  margin-right: 8px;
}

.term-arrow {
  color: var(--amber);
  margin-right: 8px;
}

.term-text {
  color: #c8d0d8;
}

.term-str {
  color: #50d8c9;
}

.term-accent {
  color: var(--amber);
  font-weight: 600;
}

.term-cursor {
  display: inline-block;
  width: 8px;
  height: 14px;
  background: var(--cyan);
  vertical-align: middle;
  animation: blink 1.1s step-end infinite;
  margin-left: 2px;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* TypeScript coloring */
.code-ts { color: #d4d4d4; }

.ts-keyword {
  color: #c586c0;
}

.ts-str {
  color: #ce9178;
}

.ts-str-tmpl {
  color: #50d8c9;
}

.ts-decorator {
  color: #dcdcaa;
}

.ts-class {
  color: #4ec9b0;
  font-weight: 500;
}

.ts-method {
  color: #dcdcaa;
}

/* ============================================
   Cockpit Section
   ============================================ */
.cockpit {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-elevated) 100%);
}

.cockpit-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.cockpit-title {
  margin-bottom: 20px;
}

.cockpit-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 40px;
}

.cockpit-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.cockpit-spec {
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.3s var(--easing);
}

.cockpit-spec:hover {
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
}

.cockpit-spec-label {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 500;
}

.cockpit-spec-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.cockpit-spec-verified {
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.verified-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan-glow);
}

.cockpit-visual {
  position: relative;
}

.cockpit-visual-inner {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 16/9;
}

.cockpit-visual-inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================
   Scenarios
   ============================================ */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.scenario-card {
  padding: 40px 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s var(--easing);
}

.scenario-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-3px);
}

.scenario-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--cyan-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  margin-bottom: 24px;
}

.scenario-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.015em;
}

.scenario-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ============================================
   Trust / Endorsement (Customer Stories)
   ============================================ */
.trust-header {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 56px;
}

.trust-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: var(--amber-soft);
  border: 1px solid rgba(232, 169, 75, 0.25);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--amber);
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.trust-pill-dot { opacity: 0.6; }

.trust-pill-en {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  opacity: 0.8;
}

.trust-title {
  font-size: clamp(36px, 4.5vw, 52px);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

/* 客户案例两大卡片 */
.trust-cases {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 56px;
}

.case-card {
  position: relative;
  padding: 48px 44px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: all 0.4s var(--easing);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.case-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  opacity: 0.6;
}

.case-card-cyan::before {
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}

.case-card::after {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 169, 75, 0.08), transparent 70%);
  pointer-events: none;
  transition: all 0.4s var(--easing);
}

.case-card-cyan::after {
  background: radial-gradient(circle, rgba(94, 200, 192, 0.08), transparent 70%);
  left: -20%;
  right: auto;
}

.case-card:hover {
  transform: translateY(-6px);
  border-color: rgba(232, 169, 75, 0.3);
  box-shadow: 0 24px 64px -24px rgba(232, 169, 75, 0.25);
}

.case-card-cyan:hover {
  border-color: rgba(94, 200, 192, 0.3);
  box-shadow: 0 24px 64px -24px rgba(94, 200, 192, 0.25);
}

.case-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
  position: relative;
  z-index: 1;
}

.case-brand-logo {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 24px;
}

.case-brand-logo img {
  height: 100px;
  width: auto;
  max-width: none;
  display: block;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.case-brand-logo-vw img {
  height: 50px;
  filter: grayscale(1) brightness(2);
}

.case-brand-tag {
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--amber);
  background: rgba(232, 169, 75, 0.1);
  border: 1px solid rgba(232, 169, 75, 0.2);
  border-radius: 100px;
  letter-spacing: 0.02em;
}

.case-brand-tag-cyan {
  color: var(--cyan);
  background: rgba(94, 200, 192, 0.1);
  border-color: rgba(94, 200, 192, 0.25);
}

.case-title {
  font-size: 26px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.case-desc {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 36px;
  position: relative;
  z-index: 1;
}

.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.case-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.case-metric-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.01em;
  word-break: keep-all;
}

.case-card-cyan .case-metric-num {
  color: var(--cyan);
}

.case-card-amber .case-metric-num {
  color: var(--amber);
}

.case-metric-unit {
  font-size: 13px;
  font-weight: 500;
  opacity: 0.7;
  margin-left: 2px;
}

.case-metric-label {
  font-size: 12.5px;
  color: var(--text-tertiary);
  line-height: 1.4;
}

/* 底部技术支撑行 */
.trust-tech-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px 32px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 100px;
  max-width: 960px;
  margin: 0 auto;
  font-size: 13px;
  color: var(--text-tertiary);
}

.trust-tech-label {
  font-weight: 500;
  color: var(--text-secondary);
  margin-right: 4px;
}

.trust-tech-item {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  color: var(--text-tertiary);
}

.trust-tech-dot {
  color: var(--text-muted);
  opacity: 0.5;
}

/* 老的 trust-grid / trust-card 样式保留以防复用，但响应式覆盖新样式 */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.trust-card {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s var(--easing);
  display: flex;
  flex-direction: column;
}

.trust-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-4px);
}

.trust-icon {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  background: var(--amber-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber);
  margin-bottom: 20px;
  flex-shrink: 0;
}

.trust-brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(232, 169, 75, 0.15), rgba(94, 200, 192, 0.1));
  border: 1px solid rgba(232, 169, 75, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--amber);
  margin-bottom: 20px;
  flex-shrink: 0;
}

.trust-brand-mark-vw {
  color: var(--cyan);
  border-color: rgba(94, 200, 192, 0.3);
  background: linear-gradient(135deg, rgba(94, 200, 192, 0.15), rgba(232, 169, 75, 0.08));
}

.trust-card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

.trust-card-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex: 1;
}

.trust-stats {
  margin-bottom: 20px;
  flex: 1;
}

.trust-stats li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.trust-stats li:last-child { border-bottom: none; }

.trust-stat-label {
  color: var(--text-tertiary);
  font-size: 12.5px;
}

.trust-stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 13.5px;
}

.trust-stat-value em {
  font-style: normal;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-tertiary);
  margin-left: 4px;
}

.trust-card-tag {
  align-self: flex-start;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--cyan);
  background: var(--cyan-soft);
  border: 1px solid rgba(94, 200, 192, 0.25);
  border-radius: 100px;
  letter-spacing: 0.02em;
}

/* ============================================
   Toolchain
   ============================================ */
.toolchain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.toolchain-card {
  position: relative;
  padding: 48px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: all 0.4s var(--easing);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.toolchain-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  opacity: 0.6;
}

.toolchain-card-cyan::before {
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}

.toolchain-card::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 169, 75, 0.06), transparent 70%);
  pointer-events: none;
  transition: all 0.4s var(--easing);
}

.toolchain-card-cyan::after {
  background: radial-gradient(circle, rgba(94, 200, 192, 0.06), transparent 70%);
  left: -20%;
  right: auto;
}

.toolchain-card:hover {
  transform: translateY(-6px);
  border-color: rgba(232, 169, 75, 0.3);
  box-shadow: 0 24px 64px -24px rgba(232, 169, 75, 0.25);
}

.toolchain-card-cyan:hover {
  border-color: rgba(94, 200, 192, 0.3);
  box-shadow: 0 24px 64px -24px rgba(94, 200, 192, 0.25);
}

.toolchain-card-head {
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.toolchain-brand {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  background: linear-gradient(135deg, var(--amber), #f0c987);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.toolchain-card-cyan .toolchain-brand {
  background: linear-gradient(135deg, var(--cyan), #9fe5df);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.toolchain-title {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.015em;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}

.toolchain-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.toolchain-features {
  list-style: none;
  padding: 0;
  margin: 0 0 36px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  position: relative;
  z-index: 1;
}

.toolchain-features li {
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  line-height: 1.4;
  transition: all 0.3s var(--easing);
}

.toolchain-card-amber:hover .toolchain-features li {
  border-color: rgba(232, 169, 75, 0.2);
  color: var(--text-primary);
}

.toolchain-card-cyan:hover .toolchain-features li {
  border-color: rgba(94, 200, 192, 0.2);
  color: var(--text-primary);
}

.toolchain-cta {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-primary);
  background: transparent;
  transition: all 0.3s var(--easing);
  position: relative;
  z-index: 1;
  align-self: flex-start;
  text-decoration: none;
}

.toolchain-cta-amber:hover {
  border-color: var(--amber);
  color: var(--amber);
  background: rgba(232, 169, 75, 0.06);
  transform: translateX(2px);
}

.toolchain-cta-cyan:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(94, 200, 192, 0.06);
  transform: translateX(2px);
}

.toolchain-cta svg {
  transition: transform 0.3s var(--easing);
}

.toolchain-cta:hover svg {
  transform: translateX(2px);
}

/* ============================================
   Open Source
   ============================================ */
.os-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.os-card {
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s var(--easing);
  display: flex;
  flex-direction: column;
}

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

.os-card-featured {
  border-color: rgba(232, 169, 75, 0.3);
  background: linear-gradient(180deg, rgba(232, 169, 75, 0.06), var(--bg-card));
  position: relative;
}

.os-card-featured::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 2px;
  background: var(--amber);
  border-radius: 0 0 2px 2px;
}

.os-card-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 8px;
}

.os-badge {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
  letter-spacing: 0.03em;
  width: fit-content;
}

.os-badge-open {
  background: var(--cyan-soft);
  color: var(--cyan);
  border: 1px solid rgba(94, 200, 192, 0.3);
}

.os-badge-enterprise {
  background: var(--amber-soft);
  color: var(--amber);
  border: 1px solid rgba(232, 169, 75, 0.3);
}

.os-name {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.os-license {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 16px;
}

.os-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 28px;
}

.os-features {
  flex: 1;
  margin-bottom: 32px;
}

.os-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  font-size: 14.5px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.os-features li:last-child { border-bottom: none; }

.os-features svg {
  color: var(--amber);
  flex-shrink: 0;
}

.os-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  transition: all 0.25s var(--easing);
  letter-spacing: -0.005em;
  margin-top: auto;
}

.os-btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

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

.os-btn-primary {
  background: var(--amber);
  color: #1a1203;
  border: 1px solid var(--amber);
}

.os-btn-primary:hover {
  background: #f0b85a;
  box-shadow: 0 8px 24px -8px var(--amber-glow);
}

/* ============================================
   Blog
   ============================================ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s var(--easing);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-3px);
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.blog-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-tertiary);
}

.blog-category {
  font-size: 12px;
  font-weight: 500;
  color: var(--amber);
  background: var(--amber-soft);
  padding: 3px 10px;
  border-radius: 100px;
}

.blog-title {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.015em;
  margin-bottom: 14px;
  transition: color 0.2s var(--easing);
}

.blog-card:hover .blog-title { color: var(--amber); }

.blog-excerpt {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
  flex: 1;
}

.blog-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--amber);
  transition: gap 0.2s var(--easing);
}

.blog-link:hover { gap: 10px; }

/* ============================================
   About
   ============================================ */
.about-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-text {
  font-size: 16.5px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
}

.about-join {
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.about-join-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.015em;
}

.about-join-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.about-positions {
  margin-bottom: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.position-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s var(--easing);
}

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

.position-item:hover { background: rgba(255,255,255,0.02); }

.position-name {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-primary);
}

.position-loc {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section { padding: 100px 0 140px; }

.cta-box {
  padding: 80px 60px;
  background: linear-gradient(135deg, rgba(232, 169, 75, 0.08), rgba(94, 200, 192, 0.05));
  border: 1px solid rgba(232, 169, 75, 0.2);
  border-radius: 24px;
  text-align: center;
}

.cta-title {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

.cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
  background: var(--bg-elevated);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 18px;
  margin-bottom: 12px;
}

.footer-logo-img {
  height: 34px;
  width: auto;
  display: block;
}

.footer-tag {
  font-size: 14px;
  color: var(--text-tertiary);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-col-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}

.footer-link {
  display: block;
  font-size: 14px;
  color: var(--text-tertiary);
  padding: 6px 0;
  transition: color 0.2s var(--easing);
}

.footer-link:hover { color: var(--text-primary); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

/* ============================================
   Reveal Animations
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--easing), transform 0.8s var(--easing);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .container { padding: 0 32px; }
  .nav-inner { padding: 0 32px; }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 60px;
    text-align: center;
  }

  .hero-ctas { justify-content: center; }
  .hero-badges { justify-content: center; }

  .chip-frame { width: 280px; height: 280px; }
  .chip-core { width: 180px; height: 180px; }

  .principles-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card-wide { grid-column: span 2; }

  .perf-grid { grid-template-columns: repeat(2, 1fr); }

  .cockpit-inner { grid-template-columns: 1fr; gap: 48px; }
  .trust-cases { grid-template-columns: 1fr; gap: 24px; }
  .case-card { padding: 40px 36px; }
  .case-title { font-size: 22px; }
  .case-brand-logo { margin-bottom: 18px; }
  .case-brand-logo img { height: 72px; filter: brightness(0) invert(1); }
  .case-brand-logo-vw img { height: 36px; filter: grayscale(1) brightness(2); }
  .trust-tech-row { border-radius: 16px; padding: 16px 20px; }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: repeat(3, 1fr); }
  .trust-card-brand:nth-child(4) { grid-column: span 2; }
  .trust-card-brand:nth-child(5) { grid-column: span 1; }

  .os-grid { grid-template-columns: 1fr; }

  .toolchain-grid { grid-template-columns: 1fr; }
  .toolchain-card { padding: 40px 32px; }
  .toolchain-brand { font-size: 30px; }
  .toolchain-title { font-size: 20px; }

  .blog-grid { grid-template-columns: repeat(2, 1fr); }

  .code-grid { grid-template-columns: 1fr; gap: 24px; }

  .about-inner { grid-template-columns: 1fr; gap: 48px; }

  .footer-inner { grid-template-columns: 1fr; gap: 48px; }
  .footer-cols { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
  :root { --nav-height: 60px; }

  .container { padding: 0 20px; }
  .nav-inner { padding: 0 20px; }

  .nav-links { display: none; }

  .section { padding: 80px 0; }
  .section-header { margin-bottom: 48px; }

  .toolchain-card { padding: 32px 24px; }
  .toolchain-brand { font-size: 26px; }
  .toolchain-title { font-size: 18px; }
  .toolchain-desc { font-size: 14px; }

  .hero {
    min-height: auto;
    padding: calc(var(--nav-height) + 60px) 0 60px;
  }

  .hero-inner { gap: 48px; }

  .chip-frame { width: 240px; height: 240px; }
  .chip-core { width: 160px; height: 160px; }
  .chip-label { font-size: 22px; }
  .chip-grid { width: 90px; }

  .chip-data { gap: 20px; }
  .chip-data-value { font-size: 16px; }

  .hero-scroll { display: none; }

  .position-bar-inner { gap: 16px; }
  .position-bar-sep { display: none; }

  .compare-row {
    grid-template-columns: 1fr 1fr;
  }
  .compare-label-cell {
    grid-column: span 2;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
  }

  .principles-grid { grid-template-columns: 1fr; }

  .arch-layer {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 24px;
  }

  .features-grid { grid-template-columns: 1fr; }
  .feature-card-wide { grid-column: span 1; }

  .perf-grid { grid-template-columns: 1fr; }
  .perf-num { font-size: 36px; }

  .cockpit-specs { grid-template-columns: 1fr; }

  .trust-cases { grid-template-columns: 1fr; gap: 20px; }
  .case-card { padding: 32px 24px; }
  .case-title { font-size: 20px; }
  .case-desc { font-size: 14px; }
  .case-metrics { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
  .case-metric-num { font-size: 18px; }
  .case-brand-row { flex-direction: column; align-items: flex-start; gap: 14px; margin-bottom: 28px; }
  .trust-tech-row { flex-direction: column; align-items: flex-start; gap: 6px; border-radius: 12px; padding: 16px 20px; }
  .trust-tech-dot { display: none; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; }
  .trust-card-brand:nth-child(4),
  .trust-card-brand:nth-child(5) { grid-column: span 1; }
  .trust-pill { font-size: 12px; padding: 6px 16px; }
  .trust-pill-en { display: none; }

  .blog-grid { grid-template-columns: 1fr; }

  .cta-box { padding: 48px 28px; }

  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .os-card { padding: 28px; }
  .about-join { padding: 28px; }

  .code-window-body { padding: 18px 20px; font-size: 12px; }
  .dev-exp-pill { font-size: 12px; padding: 6px 16px; }
  .dev-exp-pill-en { display: none; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}