:root {
  --bg: #07111f;
  --panel: #0d1b2d;
  --panel-soft: #10233c;
  --text: #eaf2ff;
  --muted: #aebdd3;
  --line: rgba(255,255,255,0.08);
  --primary: #4ea1ff;
  --primary-strong: #1d7df2;
  --accent: #71e4c8;
  --shadow: 0 20px 60px rgba(0,0,0,0.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(78,161,255,0.14), transparent 28%),
    radial-gradient(circle at top left, rgba(113,228,200,0.08), transparent 22%),
    linear-gradient(180deg, #08111d 0%, #0a1625 100%);
}

a { color: inherit; text-decoration: none; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(7, 17, 31, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

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

.brand {
  font-weight: 800;
  letter-spacing: 0.02em;
  font-size: 1.05rem;
}

.nav nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.nav nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

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

.hero {
  padding: 84px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 32px;
  align-items: center;
}

.eyebrow,
.section-tag {
  margin: 0 0 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.82rem;
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.15;
  white-space: pre-line;
}

.hero-text,
.hero-subtext,
.section-desc,
.card p,
.contact-meta span,
.site-footer p {
  color: var(--muted);
  line-height: 1.8;
}

.hero-text {
  font-size: 1.08rem;
  max-width: 760px;
  margin: 22px 0 0;
}

.hero-subtext {
  font-size: 0.98rem;
  max-width: 760px;
  margin: 14px 0 0;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 128px;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
}

.btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #fff;
  box-shadow: 0 12px 30px rgba(29,125,242,0.28);
}

.btn.secondary {
  border-color: var(--line);
  background: rgba(255,255,255,0.03);
}

.hero-card,
.card,
.contact-box {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015));
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 24px;
}

.hero-stat + .hero-stat {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.hero-stat strong,
.card h3,
.contact-meta strong {
  display: block;
  font-size: 1.06rem;
}

.hero-stat span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.7;
}

.section {
  padding: 56px 0;
}

.section.alt {
  background: rgba(255,255,255,0.02);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3.8vw, 2.8rem);
}

.section-desc {
  max-width: 820px;
  margin-top: 16px;
}

.cards {
  display: grid;
  gap: 20px;
  margin-top: 28px;
}

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

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

.card {
  padding: 24px;
}

.card h3 {
  margin: 0 0 12px;
}

.card p {
  margin: 0;
}

.feature-card ul {
  margin: 16px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.9;
}

.contact-box {
  padding: 28px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  align-items: center;
}

.contact-meta {
  display: grid;
  gap: 16px;
}

.contact-meta div {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
}

.contact-meta span {
  display: block;
  margin-bottom: 8px;
  font-size: 0.92rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 34px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.site-footer p {
  margin: 6px 0 0;
}

.icp-wrap {
  display: flex;
  align-items: center;
}

.icp {
  font-weight: 700;
  color: #dbe7f8;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.icp:hover {
  color: #ffffff;
  opacity: 0.92;
}

@media (max-width: 900px) {
  .hero-grid,
  .contact-box,
  .cards.three,
  .cards.two {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .container { width: min(1120px, calc(100% - 28px)); }
  .hero { padding-top: 64px; }
  .section { padding: 42px 0; }
}