:root {
  --bg: #020617;
  --bg-soft: #0b1220;
  --surface: rgba(15, 23, 42, 0.75);
  --surface-solid: #0f172a;
  --surface-alt: rgba(30, 41, 59, 0.8);
  --border: rgba(148, 163, 184, 0.15);
  --text-primary: #e2e8f0;
  --text-secondary: #cbd5f5;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.12);
  --accent-strong: #2563eb;
  --shadow-strong: 0 40px 80px rgba(15, 23, 42, 0.6);
  --shadow-soft: 0 20px 40px rgba(15, 23, 42, 0.45);
  --radius-lg: 28px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --container-width: min(1120px, 92vw);
  color-scheme: dark;
}

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

body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
  background:
    radial-gradient(circle at top right, rgba(59, 130, 246, 0.25), transparent 55%),
    radial-gradient(circle at bottom left, rgba(59, 130, 246, 0.18), transparent 45%),
    var(--bg);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-sm);
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: var(--container-width);
  margin: 0 auto;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 600;
}

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.4rem, 4vw, 3.6rem);
}

h2 {
  font-size: clamp(2rem, 3vw, 2.8rem);
}

h3 {
  font-size: clamp(1.25rem, 2.2vw, 1.6rem);
}

p {
  color: var(--text-secondary);
}

.section {
  padding: clamp(4rem, 8vw, 6rem) 0;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto clamp(2rem, 4vw, 3rem);
}

.section-head.align-left {
  text-align: left;
  margin-left: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(2, 6, 23, 0.8);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  display: inline-flex;
  align-items: center;
}

.logo img {
  height: 36px;
  width: auto;
  display: block;
  filter: drop-shadow(0 10px 20px rgba(15, 23, 42, 0.45));
}

.logo-text {
  margin-left: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  font-size: 1.35rem;
  color: #f8fafc;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.95rem;
}

.site-nav a {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus {
  color: #f8fafc;
}

.site-nav .cta-link {
  padding: 0.55rem 1.2rem;
  border-radius: 999px;
  background: var(--accent);
  color: #0b1220;
  font-weight: 600;
}

.site-nav .language-toggle {
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  color: #e2e8f0;
  font-weight: 500;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.site-nav .language-toggle:hover,
.site-nav .language-toggle:focus {
  background: rgba(148, 163, 184, 0.2);
  color: #ffffff;
  border-color: rgba(148, 163, 184, 0.85);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  border: none;
  background: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: #e2e8f0;
  border-radius: 999px;
}

.hero {
  padding-top: clamp(6rem, 9vw, 8rem);
}

.hero-content {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

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

.hero-title {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: clamp(2.1rem, 3.6vw, 3.4rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.hero-title-line {
  display: inline-block;
}

.hero-title-line.nowrap {
  white-space: nowrap;
}

.hero-title-line.accent {
  color: #93c5fd;
  text-shadow: 0 18px 32px rgba(59, 130, 246, 0.18);
}

.hero-copy .eyebrow {
  margin-bottom: 0.6rem;
}

.hero-copy .lead {
  margin-top: 1.4rem;
  margin-bottom: 1.6rem;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.8rem;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.3s ease;
}

.btn.primary {
  background: linear-gradient(120deg, #60a5fa, var(--accent-strong));
  color: #0b1220;
  box-shadow: var(--shadow-soft);
}

.btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-strong);
}

.btn.ghost {
  background: var(--surface);
  color: var(--text-secondary);
  border-color: var(--border);
}

.btn.ghost:hover {
  border-color: rgba(148, 163, 184, 0.45);
  background: var(--surface-alt);
}

.btn.inline {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: transparent;
  color: var(--accent);
}

.hero-highlights {
  list-style: none;
  display: grid;
  gap: 0.65rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 1.4rem;
}

.hero-highlights li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: inset 0 1px 0 rgba(148, 163, 184, 0.15);
}

.hero-highlights li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.18);
}

.hero-media {
  position: relative;
}

.hero-slider {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 1.1rem;
  box-shadow: var(--shadow-strong);
}

.slider-track {
  display: flex;
  transition: transform 0.6s ease;
}

.slide {
  min-width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.slide img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

.slider-control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(15, 23, 42, 0.55);
  color: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.slider-control:hover {
  background: rgba(15, 23, 42, 0.75);
  transform: translateY(-50%) scale(1.05);
}

.slider-control.prev {
  left: 1.25rem;
}

.slider-control.next {
  right: 1.25rem;
}

.slider-control span[aria-hidden='true'] {
  font-size: 1.5rem;
  line-height: 1;
}

.slider-dots {
  position: absolute;
  left: 50%;
  bottom: 1rem;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
}

.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: none;
  background: rgba(148, 163, 184, 0.35);
  transition: background 0.2s ease, width 0.2s ease;
  cursor: pointer;
  padding: 0;
}

.slider-dot.active {
  width: 26px;
  background: var(--accent);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.75rem;
}

.feature-card {
  background: var(--surface);
  padding: 2rem 1.8rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(148, 163, 184, 0.35);
}

.feature-illustration {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: var(--shadow-soft);
  display: block;
}

.workflow {
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(16px);
}

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: clamp(2rem, 4vw, 3rem);
}

.step {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  background: var(--surface);
  position: relative;
  overflow: hidden;
}

.step-index {
  font-size: 0.9rem;
  color: rgba(148, 163, 184, 0.6);
  margin-bottom: 1rem;
  font-weight: 600;
}

.customization {
  background:
    radial-gradient(circle at right top, rgba(37, 99, 235, 0.35), transparent 45%),
    rgba(11, 18, 32, 0.85);
}

.customization-content {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

.customization-list {
  list-style: none;
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0 2rem;
}

.customization-list strong {
  color: #f8fafc;
}

.customization-media {
  background: var(--surface);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}

.customization-media figcaption {
  margin-top: 0.75rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.gallery figure {
  background: var(--surface);
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}

.gallery figcaption {
  margin-top: 0.6rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.video-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  align-items: start;
}

.video-item {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  height: 100%;
}

.video-wrapper video {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #000;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-strong);
}

.video-caption {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.video-caption h2 {
  margin: 0;
}

.video-caption p {
  margin: 0;
}

.cta {
  padding-bottom: clamp(5rem, 10vw, 7rem);
}

.cta-card {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.16), rgba(37, 99, 235, 0.38));
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 6vw, 3.5rem);
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: var(--shadow-strong);
  text-align: center;
}

.cta-card h2 {
  margin-bottom: 1rem;
}

.cta-card p {
  margin-bottom: 1.5rem;
}

.cta-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.cta-form input {
  padding: 0.9rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  outline: none;
  font-size: 1rem;
  background: rgba(15, 23, 42, 0.25);
  color: #f8fafc;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.3);
}

.cta-form input:focus {
  box-shadow: inset 0 0 0 1px var(--accent);
}

.cta-form button {
  padding: 0.9rem 1.6rem;
  border-radius: 999px;
  border: none;
  font-weight: 600;
  background: var(--accent-strong);
  color: #f8fafc;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-form button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.25);
}

.disclaimer {
  font-size: 0.85rem;
  color: rgba(226, 232, 240, 0.72);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0 2.5rem;
  background: rgba(2, 6, 23, 0.9);
}

.site-footer .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  align-items: start;
  justify-items: start;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: flex-start;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--text-secondary);
}

.footer-contact {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-contact a {
  color: var(--accent);
}

.footer-contact a:hover {
  color: var(--text-secondary);
}

.footer-copy {
  grid-column: 1 / -1;
  text-align: center;
  color: rgba(148, 163, 184, 0.6);
  font-size: 0.85rem;
  margin-top: 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

[data-animate] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .hero-content,
  .customization-content {
    grid-template-columns: 1fr;
  }

  .hero-media {
    order: -1;
  }

  .hero-slider {
    padding: 0.9rem;
  }

  .slider-control {
    width: 34px;
    height: 34px;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 1.5rem;
    background: rgba(2, 6, 23, 0.96);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: var(--shadow-soft);
    transform: scale(0.95);
    transform-origin: top right;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }

  .site-nav.open {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
  }

  .nav-toggle {
    display: flex;
  }
}

@media (max-width: 720px) {
  .section {
    padding: clamp(3.5rem, 10vw, 4.5rem) 0;
  }

  .hero {
    padding-top: clamp(4.5rem, 8vw, 5rem);
  }

  .hero-actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
  }

  .slider-control {
    display: none;
  }

  .slider-dots {
    bottom: 0.75rem;
  }

  .hero-slider {
    padding: 0.8rem;
  }

  .feature-card,
  .step,
  .gallery figure,
  .customization-media {
    padding: 1.4rem;
  }

  .cta-form {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}