:root {
  color-scheme: dark;
  --bg: #070b14;
  --panel: rgba(13, 19, 33, 0.88);
  --panel-strong: rgba(18, 26, 44, 0.96);
  --border: rgba(148, 163, 184, 0.16);
  --text: #f8fafc;
  --muted: #a8b3c7;
  --accent: #3cc4ff;
  --accent-strong: #0991d6;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.26);
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(7, 11, 20, 0.78);
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}

.brand {
  color: var(--text);
}

.brand-lockup,
.footer-brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-image {
  display: block;
  width: auto;
  height: 52px;
}

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

.nav a:hover,
.section-link:hover {
  color: var(--text);
}

.hero {
  position: relative;
  min-height: 760px;
  display: flex;
  align-items: stretch;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(7, 11, 20, 0.34), rgba(7, 11, 20, 0.86)),
    radial-gradient(circle at top left, rgba(60, 196, 255, 0.18), transparent 36%),
    #09111f;
}

.hero-media {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(140deg, rgba(12, 18, 32, 0.12), rgba(12, 18, 32, 0.55)),
    url("https://images.unsplash.com/photo-1500530855697-b586d89ba3ee?auto=format&fit=crop&w=1600&q=80");
  background-position: center;
  background-size: cover;
  transform: scale(1.04);
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 0 96px;
}

.hero-logo {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  background: rgba(7, 11, 20, 0.44);
  backdrop-filter: blur(10px);
}

.hero-logo-image {
  display: block;
  width: auto;
  max-width: min(460px, 72vw);
  height: 120px;
  object-fit: contain;
}

.eyebrow,
.section-kicker {
  margin: 22px 0 0;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2 {
  margin: 16px 0 0;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 760px;
  font-size: clamp(44px, 7vw, 74px);
  line-height: 1.02;
}

.hero-copy {
  max-width: 760px;
  margin: 22px 0 0;
  color: #d9e4f3;
  font-size: 18px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 144px;
  height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
}

.button-primary {
  background: var(--accent);
  color: #03111b;
}

.button-primary:hover {
  background: #64d3ff;
}

.button-secondary {
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(7, 11, 20, 0.28);
  color: var(--text);
}

.button-secondary:hover {
  background: rgba(15, 23, 42, 0.64);
}

.hero-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.hero-notes span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(9, 15, 27, 0.48);
  color: #d9e4f3;
  font-size: 13px;
}

.section {
  padding: 88px 0;
}

.section-alt {
  background: rgba(9, 15, 27, 0.68);
}

.section-heading {
  max-width: 860px;
}

.section-heading.compact {
  max-width: 740px;
}

.section-heading h2 {
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.15;
}

.section-heading p:last-child,
.notice-panel p,
.feature-card p,
.timeline-item p,
.footer-copy,
.footer-item {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}

.overview-grid,
.feature-grid,
.footer-grid {
  display: grid;
  gap: 20px;
  margin-top: 34px;
}

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

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

.footer-grid {
  grid-template-columns: 1.2fr 1fr 1fr;
}

.panel,
.feature-card,
.notice-panel {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel,
.feature-card {
  padding: 24px;
}

.panel h3,
.feature-card h3,
.timeline-item h3,
.footer-title {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
}

.panel ul {
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.panel li {
  margin-top: 12px;
  line-height: 1.7;
}

.feature-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 32px;
  border-radius: 999px;
  background: rgba(60, 196, 255, 0.12);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.feature-card h3 {
  margin-top: 18px;
}

.timeline {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 18px;
  padding: 22px 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-strong);
}

.timeline-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(60, 196, 255, 0.12);
  color: var(--accent);
  font-size: 18px;
  font-weight: 700;
}

.notice-panel {
  padding: 28px;
}

.footer-logo-image {
  display: block;
  width: auto;
  height: 64px;
  object-fit: contain;
}

.site-footer {
  padding: 40px 0 54px;
  border-top: 1px solid rgba(148, 163, 184, 0.08);
  background: #060a12;
}

.footer-record {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.footer-record a {
  color: var(--muted);
  text-decoration: none;
}

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

@media (max-width: 980px) {
  .overview-grid,
  .feature-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 680px;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(var(--container), calc(100% - 28px));
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .nav {
    gap: 14px 18px;
    font-size: 13px;
  }

  .hero {
    min-height: 620px;
  }

  .hero-content {
    padding: 104px 0 72px;
  }

  .hero-logo {
    padding: 12px 14px;
  }

  .brand-logo-image {
    height: 44px;
  }

  .hero-logo-image {
    height: 88px;
  }

  .footer-logo-image {
    height: 52px;
  }

  .hero-copy,
  .section-heading p:last-child,
  .notice-panel p,
  .feature-card p,
  .timeline-item p,
  .footer-copy,
  .footer-item {
    font-size: 15px;
  }

  .section {
    padding: 72px 0;
  }

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