:root {
  color-scheme: light;
  --bg: #08111f;
  --bg-soft: #0e1b32;
  --panel: rgba(10, 23, 45, 0.74);
  --panel-strong: #10213e;
  --line: rgba(148, 163, 184, 0.22);
  --text: #e5eefc;
  --muted: #a7b8d8;
  --brand: #5aa9ff;
  --brand-strong: #2e7df6;
  --accent: #7fe0ff;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(90, 169, 255, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(127, 224, 255, 0.14), transparent 25%),
    linear-gradient(180deg, #08111f 0%, #091423 30%, #0b1528 100%);
  line-height: 1.6;
}

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

img {
  max-width: 100%;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: rgba(8, 17, 31, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner,
.footer-inner,
.hero-grid,
.install-grid,
.usage-grid,
.platform-grid {
  display: grid;
  gap: 24px;
}

.header-inner {
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  box-shadow: 0 10px 24px rgba(47, 128, 247, 0.28);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 24px;
  font-weight: 800;
}

.brand-text span {
  color: var(--muted);
  font-size: 15px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.nav a {
  color: var(--muted);
  font-size: 14px;
}

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

.hero {
  padding: 72px 0 24px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  align-items: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero h1,
.section-heading h2,
.cta h2 {
  margin: 0;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 60px);
}

.hero-tagline {
  margin: 16px 0 0;
  color: var(--text);
  font-size: clamp(22px, 3.5vw, 32px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.lead {
  max-width: 720px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions,
.button-group,
.hero-meta,
.feature-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions,
.hero-meta {
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

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

.button-primary {
  background: linear-gradient(180deg, #68b4ff 0%, #2e7df6 100%);
  color: #fff;
  box-shadow: 0 16px 40px rgba(46, 125, 246, 0.3);
}

.button-secondary {
  border-color: rgba(144, 180, 255, 0.22);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.hero-meta {
  padding: 0;
  margin-bottom: 0;
  list-style: none;
}

.hero-meta li,
.feature-pills span {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  font-size: 14px;
}

.hero-card,
.announcement,
.card,
.install-card,
.platform-card,
.timeline-item,
.usage-card,
.faq-item,
.cta {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-card {
  border-radius: 28px;
  overflow: hidden;
}

.hero-card-top {
  display: flex;
  gap: 8px;
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.03);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
}

.hero-card-body {
  padding: 34px;
}

.mini-logo {
  width: 72px;
  height: 72px;
  margin-bottom: 24px;
  border-radius: 22px;
  box-shadow: 0 18px 40px rgba(47, 128, 247, 0.28);
}

.hero-card-body h2,
.card h3,
.install-card h3,
.platform-card h3,
.timeline-body h3,
.usage-card h3,
.faq-item h3 {
  margin: 0 0 12px;
}

.hero-card-body p,
.card p,
.announcement p,
.install-card p,
.platform-card p,
.timeline-body p,
.usage-card p,
.faq-item p,
.cta p {
  margin: 0;
  color: var(--muted);
}

.feature-pills {
  margin-top: 24px;
}

.section {
  padding: 28px 0 36px;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), rgba(255, 255, 255, 0.03));
}

.announcement,
.cta {
  padding: 24px;
  border-radius: 24px;
}

.announcement strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.section-heading {
  margin-bottom: 26px;
}

.section-heading h2,
.cta h2 {
  font-size: clamp(28px, 4vw, 42px);
}

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

.card,
.install-card,
.platform-card,
.usage-card,
.faq-item {
  padding: 24px;
  border-radius: 22px;
}

.install-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.steps {
  margin: 16px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.platform-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.timeline {
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 18px;
  padding: 22px 24px;
  border-radius: 22px;
}

.timeline-date {
  color: var(--accent);
  font-weight: 700;
}

.usage-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.faq-list {
  display: grid;
  gap: 16px;
}

.cta {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
}

.site-footer {
  padding: 20px 0 44px;
}

.footer-inner {
  gap: 4px;
}

.footer-inner p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 960px) {
  .hero-grid,
  .install-grid,
  .cta,
  .platform-grid,
  .card-grid,
  .usage-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .header-inner {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px 0;
  }

  .nav {
    gap: 14px;
  }

  .hero {
    padding-top: 48px;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(1120px, calc(100% - 24px));
  }

  .hero-card-body,
  .card,
  .install-card,
  .platform-card,
  .timeline-item,
  .usage-card,
  .faq-item,
  .announcement,
  .cta {
    padding: 20px;
  }

  .button,
  .hero-meta li,
  .feature-pills span {
    width: 100%;
  }
}