/* ============================================
   AI月石采集车 — 白底明快风格 v2
   ============================================ */

:root {
  --bg-white: #ffffff;
  --bg-light: #f7f8fc;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f4ff;
  --text-primary: #1a1a2e;
  --text-secondary: #52567a;
  --text-muted: #9295b0;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --accent-softer: #dbeafe;
  --accent-glow: rgba(37, 99, 235, 0.15);
  --gradient-accent: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --gradient-hero: linear-gradient(160deg, #f0f4ff 0%, #dbeafe 40%, #ede9fe 70%, #f0f4ff 100%);
  --border: #e5e7f0;
  --border-hover: #c7cbdf;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font-cn: 'Noto Sans SC', system-ui, sans-serif;
  --font-en: 'Orbitron', monospace;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-cn);
  background: var(--bg-white);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

img {
  max-width: 100%;
  height: auto;
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  box-shadow: 0 1px 12px rgba(0,0,0,0.04);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-cn);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: var(--transition);
  border-radius: 1px;
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- Hero Section ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 0;
}

.hero-split {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 120px 24px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero-content {
  max-width: 560px;
}

.hero-tag {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeUp 0.8s 0.2s forwards;
}

.hero-title {
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 0.8s 0.4s forwards;
}

.hero-title-cn {
  display: block;
  font-size: clamp(2.6rem, 6vw, 4.5rem);
  font-weight: 900;
  background: linear-gradient(135deg, #1a1a2e 0%, #2563eb 60%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.15;
  margin-bottom: 8px;
}

.hero-title-sub {
  display: block;
  font-family: var(--font-en);
  font-size: clamp(0.95rem, 2vw, 1.3rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeUp 0.8s 0.6s forwards;
}

.hero-meta {
  display: flex;
  gap: 20px;
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeUp 0.8s 0.8s forwards;
}

.hero-cta {
  display: inline-block;
  padding: 14px 36px;
  background: var(--gradient-accent);
  color: #fff;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  opacity: 0;
  animation: fadeUp 0.8s 1s forwards;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37, 99, 235, 0.3);
}

.hero-image {
  opacity: 0;
  animation: fadeScale 1s 0.5s forwards;
  position: relative;
}

.hero-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.12));
}

@keyframes fadeScale {
  from { opacity: 0; transform: scale(0.92) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  width: 24px;
  height: 40px;
  border: 2px solid rgba(37, 99, 235, 0.25);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.scroll-dot {
  width: 4px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(12px); opacity: 0.3; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Sections ---- */
.section {
  position: relative;
  padding: 120px 0;
  z-index: 1;
  background: var(--bg-white);
}

.section--alt {
  background: var(--bg-light);
}

.section--gradient {
  background: linear-gradient(180deg, var(--bg-light) 0%, #eef2ff 50%, var(--bg-light) 100%);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.2em;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-top: 12px;
}

/* ---- About Section ---- */
.about-hero-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 56px;
}

.about-hero-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--bg-light);
}

.about-hero-img img {
  width: 100%;
  display: block;
  transition: var(--transition);
}

.about-hero-img:hover img {
  transform: scale(1.03);
}

.about-hero-text h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.about-hero-text p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 2;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.about-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.about-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.about-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.about-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ---- Features (alternating rows) ---- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.feature-row:last-child {
  margin-bottom: 0;
}

.feature-row--reverse {
  direction: rtl;
}

.feature-row--reverse > * {
  direction: ltr;
}

.feature-num {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 900;
  color: #fff;
  background: var(--gradient-accent);
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.feature-text h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.feature-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.9;
}

.feature-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-white);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.feature-img:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.feature-img img {
  width: 100%;
  display: block;
}

/* ---- Hardware Grid ---- */
.hw-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.hw-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.hw-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
}

.hw-card--wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  align-items: center;
}

.hw-card--wide .hw-card-info {
  padding: 40px 48px;
}

.hw-card--wide .hw-card-info h3 {
  font-size: 1.4rem;
}

.hw-card-img {
  overflow: hidden;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4/3;
}

.hw-card--wide .hw-card-img {
  aspect-ratio: auto;
  max-height: 340px;
}

.hw-card-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 16px;
  transition: var(--transition);
}

.hw-card:hover .hw-card-img img {
  transform: scale(1.05);
}

.hw-card-info {
  padding: 20px 24px 24px;
}

.hw-card-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.hw-card-info p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---- Timeline ---- */
.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, #c7d2fe 100%);
}

.timeline-item {
  position: relative;
  padding-left: 64px;
  padding-bottom: 48px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: 12px;
  top: 8px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-white);
  border: 3px solid var(--accent);
  z-index: 2;
  transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.timeline-item:hover .timeline-card {
  border-color: #a5b4fc;
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.timeline-label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.timeline-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.timeline-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ---- Design Showcase ---- */
.design-showcase {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
  margin-bottom: 48px;
}

.design-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.design-image:hover {
  transform: scale(1.015);
  box-shadow: var(--shadow-xl);
}

.design-image img {
  width: 100%;
  height: auto;
  display: block;
}

.design-specs h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.spec-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.spec-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.spec-item:hover {
  border-color: #a5b4fc;
  background: #eef2ff;
}

.spec-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.spec-value {
  font-size: 0.88rem;
  color: var(--text-primary);
  font-weight: 600;
  text-align: right;
}

.design-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.design-gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-light);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.design-gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

.design-gallery-item img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: contain;
  display: block;
  padding: 12px;
}

.design-gallery-item span {
  display: block;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 10px 12px 14px;
  border-top: 1px solid var(--border);
  background: var(--bg-white);
}

/* ---- Innovation Cards ---- */
.innovation-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.inno-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.inno-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: var(--transition);
}

.inno-card:hover {
  transform: translateY(-6px);
  border-color: #a5b4fc;
  box-shadow: var(--shadow-lg);
}

.inno-card:hover::before {
  opacity: 1;
}

.inno-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.inno-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.inno-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ---- Vision Section ---- */
.vision-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  padding: 40px 0;
}

.vision-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 24px;
  margin-top: 12px;
  color: var(--text-primary);
}

.vision-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.vision-quote {
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  font-weight: 500;
  line-height: 1.8;
  color: var(--text-primary);
  border: none;
  padding: 40px;
  background: #fff;
  border-radius: var(--radius);
  border-left: 4px solid var(--accent);
  margin-bottom: 24px;
  font-style: normal;
  box-shadow: var(--shadow-md);
}

.vision-author {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ---- Footer ---- */
.footer {
  position: relative;
  z-index: 1;
  padding: 48px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-light);
}

.footer-inner {
  text-align: center;
}

.footer-inner > p:first-child {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.footer-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.6;
}

/* ---- Scroll Animations ---- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .hero-split {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-meta {
    justify-content: center;
  }

  .hero-image img {
    max-width: 480px;
    margin: 0 auto;
    display: block;
  }

  .about-hero-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .feature-row,
  .feature-row--reverse {
    grid-template-columns: 1fr;
    gap: 32px;
    direction: ltr;
  }

  .design-showcase {
    grid-template-columns: 1fr;
  }

  .hw-card--wide {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

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

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

  .innovation-cards {
    grid-template-columns: 1fr;
  }

  .design-gallery {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 80px 0;
  }

  .feature-row {
    margin-bottom: 56px;
  }

  .vision-quote br {
    display: none;
  }
}

@media (max-width: 600px) {
  .hero-meta {
    flex-direction: column;
    gap: 8px;
  }

  .spec-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .spec-value {
    text-align: left;
  }

  .timeline::before {
    left: 14px;
  }

  .timeline-dot {
    left: 6px;
    width: 16px;
    height: 16px;
  }

  .timeline-item {
    padding-left: 48px;
  }

  .hero-split {
    padding: 100px 16px 60px;
  }
}

/* ---- Nav CTA link ---- */
.nav-link--cta {
  background: var(--gradient-accent);
  color: #fff !important;
  padding: 5px 16px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.85rem;
  transition: var(--transition);
}

.nav-link--cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.nav-link--cta::after {
  display: none !important;
}

/* ---- Remote Control CTA Section ---- */
.cta-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 56px;
  overflow: hidden;
  position: relative;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-card .section-tag {
  color: var(--accent);
}

.cta-title {
  font-size: 2rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-top: 8px;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 28px;
}

.cta-btn {
  display: inline-block;
  padding: 14px 32px;
  background: var(--gradient-accent);
  color: #fff;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37, 99, 235, 0.3);
}

.cta-preview {
  position: relative;
  z-index: 1;
}

.cta-screen {
  background: var(--bg-white);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}

.cta-screen-bar {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
}

.cta-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-hover);
}

.cta-screen img {
  width: 100%;
  display: block;
}

@media (max-width: 768px) {
  .cta-card {
    grid-template-columns: 1fr;
    padding: 36px 28px;
    gap: 32px;
  }
}

/* ---- Lunar Exploration Section ---- */
.section--lunar {
  padding-top: 0;
  padding-bottom: 100px;
  background: var(--bg-white);
}

.lunar-banner {
  position: relative;
  width: 100%;
  height: 480px;
  overflow: hidden;
  margin-bottom: 72px;
}

.lunar-banner-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.lunar-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.5) 50%, rgba(255, 255, 255, 0.15) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 60px;
}

.lunar-banner-overlay .section-tag {
  color: var(--accent);
}

.lunar-banner-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-top: 8px;
  margin-bottom: 12px;
}

.lunar-banner-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.8;
}

.lunar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.lunar-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.lunar-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
}

.lunar-card--hero {
  grid-column: 1 / 2;
  grid-row: 1 / 3;
}

.lunar-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.lunar-card--hero img {
  aspect-ratio: auto;
  height: 100%;
}

.lunar-card-caption {
  padding: 16px 20px;
}

.lunar-card-caption h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.lunar-card-caption p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.lunar-vision-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.lunar-vision-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.lunar-vision-img img {
  width: 100%;
  display: block;
}

.lunar-vision-text h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.lunar-vision-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 28px;
}

.lunar-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.lunar-stat {
  text-align: center;
  padding: 20px 12px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.lunar-stat-num {
  display: block;
  font-family: var(--font-en);
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--accent);
  margin-bottom: 4px;
}

.lunar-stat-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.4;
}

@media (max-width: 1024px) {
  .lunar-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .lunar-card--hero {
    grid-column: 1 / -1;
    grid-row: auto;
  }

  .lunar-card--hero img {
    aspect-ratio: 16/9;
  }

  .lunar-vision-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .lunar-banner {
    height: 320px;
    margin-bottom: 48px;
  }

  .lunar-banner-overlay {
    padding: 32px 24px;
  }

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

  .lunar-stats {
    grid-template-columns: 1fr;
  }
}

/* ---- Vision Section with BG ---- */
.section--vision {
  position: relative;
  padding: 120px 0;
  overflow: hidden;
}

.vision-bg-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.vision-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.vision-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.88) 0%, rgba(247, 248, 252, 0.92) 100%);
}

.section--vision .vision-content {
  position: relative;
  z-index: 1;
}

.section--vision .vision-quote {
  box-shadow: var(--shadow-md);
}

/* ---- Design Subsections ---- */
.design-sub {
  margin-top: 72px;
  padding-top: 56px;
  border-top: 1px solid var(--border);
}

.design-sub-header {
  margin-bottom: 32px;
}

.design-sub-tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.18em;
  margin-bottom: 8px;
}

.design-sub-header h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
}

.design-sub-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 40px;
}

.design-sub-row--reverse {
  direction: rtl;
}

.design-sub-row--reverse > * {
  direction: ltr;
}

.design-sub-text h4 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.design-sub-text p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}

.design-sub-list {
  list-style: none;
  padding: 0;
  margin-bottom: 20px;
}

.design-sub-list li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  padding-left: 20px;
  position: relative;
  margin-bottom: 6px;
}

.design-sub-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.design-sub-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.design-sub-specs span {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: #eef2ff;
  border-radius: 20px;
  border: 1px solid #c7d2fe;
}

.design-sub-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-light);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

.design-sub-img img {
  width: 100%;
  max-height: 420px;
  display: block;
  object-fit: contain;
  padding: 8px;
}

.design-gallery--4 {
  grid-template-columns: repeat(4, 1fr);
}

/* AI Pipeline */
.ai-pipeline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  padding: 32px 24px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex-wrap: wrap;
}

.pipeline-step {
  text-align: center;
  padding: 16px 20px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  min-width: 100px;
  transition: var(--transition);
}

.pipeline-step:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.pipeline-icon {
  font-size: 1.6rem;
  margin-bottom: 6px;
}

.pipeline-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.pipeline-arrow {
  font-size: 1.4rem;
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

@media (max-width: 1024px) {
  .design-sub-row,
  .design-sub-row--reverse {
    grid-template-columns: 1fr;
    gap: 28px;
    direction: ltr;
  }

  .design-gallery--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .design-gallery--4 {
    grid-template-columns: 1fr;
  }

  .ai-pipeline {
    flex-direction: column;
    gap: 4px;
  }

  .pipeline-arrow {
    transform: rotate(90deg);
  }
}

/* ---- Print Styles ---- */
@media print {
  body {
    background: #fff !important;
    color: #000 !important;
  }

  .nav, .scroll-indicator {
    display: none !important;
  }

  .hero-bg {
    background: #fff !important;
  }

  .section, .section--alt, .section--gradient, .section--lunar, .section--vision {
    background: #fff !important;
  }

  .lunar-banner-overlay {
    background: linear-gradient(to top, rgba(255,255,255,0.97) 0%, rgba(255,255,255,0.6) 100%) !important;
  }

  .vision-bg-overlay {
    background: rgba(255,255,255,0.95) !important;
  }

  .cta-card {
    background: #f8f9fb !important;
    border-color: #ccc !important;
  }

  .about-card, .hw-card, .inno-card, .lunar-card, .timeline-card {
    background: #fff !important;
    border-color: #ccc !important;
    box-shadow: none !important;
  }

  .footer {
    background: #fff !important;
    border-color: #ccc !important;
  }
}