:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-elevated: rgba(12, 24, 43, 0.75);
  --panel: rgba(11, 23, 42, 0.92);
  --panel-strong: #0f1d33;
  --text: #f3f7ff;
  --muted: #b8c5dd;
  --line: rgba(164, 188, 255, 0.18);
  --primary: #5da8ff;
  --primary-strong: #2f7dff;
  --accent: #66f0cf;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(74, 132, 255, 0.32), transparent 26%),
    radial-gradient(circle at top right, rgba(102, 240, 207, 0.18), transparent 22%),
    linear-gradient(180deg, #08111e 0%, #09162b 52%, #06101d 100%);
}

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

img {
  display: block;
  max-width: 100%;
}

.container {
  width: min(calc(100% - 48px), var(--container));
  margin: 0 auto;
}

.hero {
  padding: 24px 0 54px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: 18px;
  font-weight: 800;
}

.brand img {
  width: 42px;
  height: 42px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  color: var(--muted);
}

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

.nav-cta {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
}

.hero-main {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: 40px;
  align-items: center;
  padding-top: 54px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid rgba(102, 240, 207, 0.22);
  border-radius: 999px;
  background: rgba(11, 23, 42, 0.56);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 18px 0 18px;
  font-size: clamp(40px, 5vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.hero-text,
.section-heading p,
.card p,
.media-card p,
.code-card p,
.resource-card p,
.community-copy p,
.footer p {
  color: var(--muted);
  line-height: 1.7;
}

.hero-text {
  margin: 0;
  max-width: 680px;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
  box-shadow: 0 18px 44px rgba(47, 125, 255, 0.3);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.hero-metrics li,
.card,
.media-card,
.code-card,
.resource-card,
.community-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hero-metrics li {
  padding: 18px;
}

.hero-metrics strong {
  display: block;
  margin-bottom: 8px;
  font-size: 15px;
}

.hero-metrics span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.hero-card {
  padding: 18px;
  border: 1px solid rgba(164, 188, 255, 0.18);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(12, 26, 48, 0.92), rgba(10, 20, 34, 0.92));
  box-shadow: var(--shadow);
}

.hero-card img {
  border-radius: calc(var(--radius-xl) - 10px);
}

.section {
  padding: 88px 0;
}

.section-accent {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(164, 188, 255, 0.08);
  border-bottom: 1px solid rgba(164, 188, 255, 0.08);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 36px;
}

.section-heading h2 {
  margin: 18px 0 12px;
  font-size: clamp(30px, 3.4vw, 48px);
  line-height: 1.14;
}

.feature-grid,
.resource-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card,
.resource-card {
  padding: 24px;
}

.card h3,
.media-card h3,
.code-card h3,
.resource-card h3,
.community-copy h2 {
  margin: 0 0 12px;
}

.architecture-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.media-card {
  overflow: hidden;
}

.media-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.media-card div {
  padding: 24px;
}

.quickstart-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.code-card {
  padding: 24px;
}

.code-card pre {
  margin: 16px 0 0;
  padding: 18px;
  overflow: auto;
  border-radius: var(--radius-md);
  background: #06101d;
  border: 1px solid rgba(164, 188, 255, 0.12);
}

.code-card code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  color: #d8e5ff;
}

.resource-card {
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.resource-card:hover {
  transform: translateY(-3px);
  border-color: rgba(93, 168, 255, 0.45);
}

.community {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: 28px;
  align-items: center;
}

.community-card {
  padding: 20px;
}

.community-card img {
  width: 100%;
  border-radius: calc(var(--radius-lg) - 8px);
}

.footer {
  padding: 30px 0 40px;
  border-top: 1px solid rgba(164, 188, 255, 0.08);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
}

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

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (max-width: 1024px) {
  .hero-main,
  .community,
  .feature-grid,
  .resource-grid,
  .quickstart-grid,
  .architecture-grid {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .nav,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 14px;
  }

  .hero {
    padding-top: 12px;
  }

  .hero-main {
    padding-top: 34px;
  }

  .section {
    padding: 72px 0;
  }
}