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

:root {
  --primary: #1677ff;
  --primary-light: #e6f0ff;
  --primary-dark: #0958d9;
  --dark: #0F1A2E;
  --dark-light: #1a2844;
  --white: #fff;
  --accent: #FF6D00;
  --accent-light: #fff3e6;
  --gray-50: #f8f9fa;
  --gray-100: #f0f2f5;
  --gray-200: #e5e7eb;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-800: #1f2937;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
  font-size: 16px;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--dark);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--gray-500);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.highlight {
  background: linear-gradient(180deg, transparent 60%, rgba(22,119,255,0.18) 60%);
  padding: 0 4px;
}

.section-visual {
  margin-top: 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.section-visual img {
  width: 100%;
  height: auto;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 12px 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}

.nav.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
  padding: 8px 0;
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--dark);
  letter-spacing: -0.01em;
}

.nav-logo img {
  border-radius: 8px;
}

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

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-600);
  transition: color var(--transition);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero {
  position: relative;
  padding: 140px 0 100px;
  overflow: hidden;
  display: flex;
  align-items: center;
  min-height: 100vh;
}

.hero-bg {
  position: absolute;
  top: -50%;
  right: -30%;
  width: 900px;
  height: 900px;
  background: radial-gradient(circle at center, rgba(22,119,255,0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
  max-width: 600px;
  margin: 0;
  margin-left: max(24px, calc((100vw - 1200px) / 2 + 24px));
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 24px;
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-600);
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-title-cn {
  display: block;
  color: var(--dark);
  font-size: 0.75em;
  font-weight: 700;
  margin-bottom: 4px;
}

.hero-title-en {
  display: block;
  color: var(--primary);
}

.hero-title-sub {
  display: block;
  font-size: 0.48em;
  font-weight: 600;
  color: var(--gray-500);
  margin-top: 6px;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--gray-500);
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 28px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(22,119,255,0.35);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(22,119,255,0.45);
}

.btn-outline {
  background: var(--white);
  color: var(--dark);
  border: 2px solid var(--gray-200);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-outline .arrow {
  transition: transform var(--transition);
}

.btn-outline:hover .arrow {
  transform: translateX(4px);
}

.btn-accent {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(255,109,0,0.35);
}

.btn-accent:hover {
  background: #e05a00;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,109,0,0.45);
}

.btn-dark {
  background: var(--dark);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(15,26,46,0.35);
}

.btn-dark:hover {
  background: #1a2844;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15,26,46,0.45);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  border-radius: 32px;
}

.btn-emoji {
  font-size: 1.3em;
}

.hero-stats {
  display: flex;
  gap: 32px;
  align-items: center;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.1;
}

.stat-unit {
  font-size: 0.55em;
  font-weight: 600;
  color: var(--gray-400);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--gray-200);
  border-radius: 1px;
}

.hero-visual {
  position: absolute;
  right: max(-60px, calc((100vw - 1200px) / 2 - 280px));
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
}

.hero-phone {
  width: 300px;
}

.phone-frame {
  background: var(--dark);
  border-radius: 36px;
  padding: 12px;
  box-shadow: var(--shadow-xl);
}

.phone-screen {
  border-radius: 26px;
  overflow: hidden;
  background: var(--white);
}

.phone-screen img {
  width: 100%;
  height: auto;
  display: block;
}

/* Passengers */
.passengers {
  padding: 100px 0;
  background: var(--gray-50);
}

.entry-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.entry-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  text-align: center;
}

.entry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.entry-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.entry-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--dark);
}

.entry-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.6;
}

/* Drivers */
.drivers {
  padding: 100px 0;
}

.feature-grid {
  display: grid;
  gap: 20px;
  margin-bottom: 24px;
}

.two-col {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.feature-item {
  display: flex;
  gap: 16px;
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid transparent;
}

.feature-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  background: var(--white);
  border-color: var(--gray-200);
}

.feature-icon {
  font-size: 2rem;
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.feature-item h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--dark);
}

.feature-item p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.6;
}

/* Fleets */
.fleets {
  padding: 100px 0;
  background: var(--gray-50);
}

.fleet-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.fleet-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.fleet-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.fleet-card-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.fleet-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--dark);
}

.fleet-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.6;
}

/* Features */
.features {
  padding: 100px 0;
}

.feature-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feat-card {
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--gray-100);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  text-align: center;
}

.feat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  background: var(--white);
}

.feat-card-emoji {
  font-size: 2.8rem;
  margin-bottom: 16px;
}

.feat-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--dark);
}

.feat-card p {
  font-size: 0.88rem;
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: 20px;
}

.feat-card-visual {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.feat-card-visual img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

/* How It Works */
.how {
  padding: 100px 0;
  background: var(--dark);
  color: var(--white);
}

.how .section-label {
  background: rgba(22,119,255,0.2);
  color: #93b5f7;
}

.how .section-title {
  color: var(--white);
}

.how .highlight {
  background: linear-gradient(180deg, transparent 60%, rgba(22,119,255,0.3) 60%);
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  max-width: 900px;
  margin: 56px auto 0;
  position: relative;
}

.step {
  text-align: center;
  flex: 1;
  position: relative;
  z-index: 1;
}

.step-number {
  font-size: 4rem;
  font-weight: 900;
  color: rgba(255,255,255,0.08);
  line-height: 1;
  margin-bottom: -30px;
  letter-spacing: -0.04em;
}

.step-icon-wrap {
  width: 88px;
  height: 88px;
  margin: 0 auto 20px;
  background: rgba(22,119,255,0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid rgba(22,119,255,0.3);
}

.step-icon {
  font-size: 2.4rem;
}

.step h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.step p {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
}

.step-connector {
  flex: 0 0 80px;
  padding-top: 55px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.connector-line {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, rgba(22,119,255,0.4), rgba(22,119,255,0.8));
  position: relative;
  border-radius: 2px;
}

.connector-line::after {
  content: '';
  position: absolute;
  right: -4px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: 50%;
}

/* Ecosystem */
.ecosystem {
  padding: 100px 0;
}

.eco-visual {
  margin-top: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.eco-visual img {
  width: 100%;
  height: auto;
}

/* CTA */
.cta {
  padding: 80px 0;
  background: var(--gray-50);
}

.cta-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 64px 40px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-100);
}

.cta-card h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--dark);
}

.cta-card > p {
  font-size: 1.05rem;
  color: var(--gray-500);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

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

/* Footer */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.footer-logo img {
  border-radius: 6px;
}

.footer-logo span {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--white);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.55);
  margin-bottom: 10px;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: rgba(255,255,255,0.45);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: rgba(255,255,255,0.8);
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-visual {
    display: none;
  }

  .hero .container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 24px;
    text-align: center;
  }

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

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

  .hero-title-cn {
    font-size: 0.8em;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    font-size: 1.2rem;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 120px 0 60px;
    min-height: auto;
  }

  .hero-stats {
    gap: 20px;
  }

  .stat-number {
    font-size: 1.4rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .steps {
    flex-direction: column;
    align-items: center;
    gap: 32px;
  }

  .step-connector {
    flex: 0 0 40px;
    padding-top: 0;
    transform: rotate(90deg);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .stat-divider {
    width: 60px;
    height: 1px;
  }

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

  .feature-grid.two-col {
    grid-template-columns: 1fr;
  }

  .fleet-features {
    grid-template-columns: 1fr;
  }

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

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

  .cta-card {
    padding: 40px 20px;
  }

  .btn-lg {
    width: 100%;
    justify-content: center;
  }
}