:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --fg: #1f2430;
  --muted: #5c6476;
  --accent: #4f46e5;
  --accent-soft: rgba(79, 70, 229, 0.12);
  --accent-strong: rgba(79, 70, 229, 0.18);
  --card-bg: #ffffff;
  --card-border: rgba(31, 36, 48, 0.06);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  inset-inline: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem clamp(1.5rem, 4vw, 3.5rem);
  background: rgba(245, 247, 251, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(31, 36, 48, 0.05);
}

.brand {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--fg);
}

.accent-link {
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(79, 70, 229, 0.12);
  color: var(--accent);
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease;
}

.accent-link:hover,
.accent-link:focus-visible {
  background: rgba(79, 70, 229, 0.18);
  transform: translateY(-1px);
}

main {
  flex: 1;
}

section {
  padding: clamp(3rem, 9vw, 6rem) clamp(1.5rem, 5vw, 5rem);
}

.hero {
  display: grid;
  gap: clamp(2rem, 6vw, 5rem);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
  background: radial-gradient(circle at top right, rgba(79, 70, 229, 0.12), transparent 45%),
              linear-gradient(135deg, rgba(79, 70, 229, 0.08), transparent 55%);
}

.hero-content h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.5rem);
  line-height: 1.1;
  margin: 0.5rem 0 1.1rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
}

.eyebrow::before {
  content: "";
  width: 42px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
}

.lead {
  margin: 0 0 1.5rem;
  color: var(--muted);
  max-width: 36ch;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button.primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 14px 34px rgba(79, 70, 229, 0.25);
}

.button.primary:hover,
.button.primary:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(79, 70, 229, 0.28);
}

.button.outline {
  background: transparent;
  border-color: rgba(79, 70, 229, 0.4);
  color: var(--accent);
}

.button.outline:hover,
.button.outline:focus-visible {
  background: rgba(79, 70, 229, 0.08);
}

.hero-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 10% 15% 0;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.2), transparent 60%);
  filter: blur(35px);
  z-index: 0;
}

.terminal-window {
  position: relative;
  z-index: 1;
  background: #171c28;
  color: #eaf0ff;
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  min-width: clamp(280px, 40vw, 360px);
  box-shadow: 0 24px 60px rgba(23, 28, 40, 0.35);
  font-family: "Ubuntu Mono", "Fira Code", monospace;
}

.terminal-window .dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 6px;
}

.terminal-window .dot.red { background: #ff5f56; }
.terminal-window .dot.yellow { background: #ffbd2f; }
.terminal-window .dot.green { background: #27c93f; }

.terminal-window pre {
  margin: 1rem 0 0;
  font-size: 0.95rem;
  line-height: 1.5;
  color: rgba(234, 240, 255, 0.82);
}

.terminal-window .prompt {
  color: #7dd3fc;
}

.terminal-window .ghost {
  color: rgba(234, 240, 255, 0.5);
}

.feature-cards {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(245, 247, 251, 0.9));
}

.feature-cards h2,
.feature-showcase h2,
.workflow h2,
.get-started h2 {
  margin-top: 0;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.section-lead {
  margin: 0.5rem 0 2.5rem;
  max-width: 52ch;
  color: var(--muted);
}

.card-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.feature-card {
  padding: 1.8rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  box-shadow: 0 14px 32px rgba(31, 36, 48, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover,
.feature-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 22px 40px rgba(31, 36, 48, 0.1);
}

.feature-card h3 {
  margin-top: 0;
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
}

.feature-showcase {
  background: var(--bg);
}

.showcase {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: stretch;
}

.showcase-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.showcase-trigger {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: var(--card-bg);
  color: var(--fg);
  padding: 1rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(31, 36, 48, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.showcase-trigger:hover,
.showcase-trigger:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(31, 36, 48, 0.12);
}

.showcase-trigger.is-active {
  border-color: var(--accent);
  box-shadow: 0 20px 42px rgba(79, 70, 229, 0.18);
  background: var(--accent-soft);
  color: var(--accent);
}

.showcase-detail {
  background: var(--card-bg);
  padding: clamp(2rem, 5vw, 2.5rem);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  box-shadow: 0 18px 40px rgba(31, 36, 48, 0.08);
}

.showcase-detail h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.showcase-detail p {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--muted);
}

#feature-points {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--fg);
}

.workflow {
  background: linear-gradient(120deg, rgba(79, 70, 229, 0.08), rgba(245, 247, 251, 0.92));
}

.workflow-steps {
  counter-reset: step;
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.workflow-steps li {
  position: relative;
  padding: 1.5rem 1.5rem 1.5rem 3.5rem;
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-md);
  border: 1px solid rgba(79, 70, 229, 0.12);
  box-shadow: 0 10px 28px rgba(31, 36, 48, 0.08);
}

.workflow-steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 1.4rem;
  left: 1.4rem;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  display: grid;
  place-items: center;
  box-shadow: 0 12px 28px rgba(79, 70, 229, 0.25);
}

.workflow-steps h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
}

.workflow-steps p {
  margin: 0;
  color: var(--muted);
}

.get-started {
  background: radial-gradient(circle at top left, rgba(79, 70, 229, 0.18), transparent 50%),
              radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.16), transparent 45%);
}

.cta-card {
  max-width: 760px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.95);
  padding: clamp(2.2rem, 6vw, 3rem);
  border-radius: var(--radius-lg);
  box-shadow: 0 28px 60px rgba(31, 36, 48, 0.12);
  text-align: center;
}

.cta-card p {
  margin: 1rem auto 2rem;
  max-width: 50ch;
  color: var(--muted);
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer {
  padding: 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 960px) {
  .site-header {
    position: static;
    flex-wrap: wrap;
    justify-content: center;
  }

  .site-nav {
    order: 3;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }

  .accent-link {
    order: 2;
  }

  .hero {
    text-align: center;
  }

  .hero-content,
  .hero-visual {
    justify-self: center;
  }

  .lead {
    margin-left: auto;
    margin-right: auto;
  }

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

  .workflow-steps {
    grid-template-columns: 1fr;
  }

  .workflow-steps li {
    padding-left: 3.2rem;
  }
}

@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;
  }
}