:root {
  --bg: #f6f8fc;
  --bg-soft: #eef3ff;
  --text: #0f172a;
  --muted: #52607a;
  --line: #dbe3f4;
  --surface: #ffffff;
  --surface-2: #f8fbff;
  --accent: #3b82f6;
  --accent-2: #1d4ed8;
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 12%, #dbeafe 0%, transparent 42%),
    radial-gradient(circle at 88% 0%, #e0e7ff 0%, transparent 36%),
    linear-gradient(180deg, #fcfdff 0%, var(--bg) 100%);
  line-height: 1.6;
}

.container { width: min(1120px, 92%); margin: 0 auto; }
header.hero { padding: 1.2rem 0 4rem; }
section.hero { text-align: center; padding: 5.2rem 0 2rem; }

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  position: sticky;
  top: 1rem;
  z-index: 20;
  padding: 0.78rem 1rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(119, 139, 182, 0.3);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.08);
}

.logo-wrap { display: flex; align-items: center; gap: 0.55rem; }
.logo-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.13);
}
.logo-text { font-weight: 800; letter-spacing: 0.08em; }
.actions { display: flex; gap: 0.6rem; align-items: center; }

.lang-btn,
.cta,
.btn {
  border-radius: 999px;
  font-size: 0.92rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s ease;
}

.lang-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  padding: 0.45rem 0.8rem;
  cursor: pointer;
}

.btn,
.cta { padding: 0.56rem 1rem; }

.primary,
.cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border: 0;
}

.ghost {
  border: 1px solid var(--line);
  color: var(--text);
  background: #fff;
}

.eyebrow {
  display: inline-block;
  border: 1px solid #ccd9f5;
  background: rgba(255, 255, 255, 0.75);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  color: #44608f;
  font-size: 0.88rem;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 4.3rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin: 0.9rem auto 1rem;
  max-width: 13ch;
}

.subtitle {
  color: var(--muted);
  max-width: 700px;
  margin: 0 auto;
  font-size: clamp(1rem, 1.8vw, 1.2rem);
}

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
  gap: 0.7rem;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
  text-align: center;
}

.metrics > div,
.card,
.partner {
  background: linear-gradient(180deg, #ffffff 0%, var(--surface-2) 100%);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.metrics > div { padding: 1.1rem; }

.metric-value {
  margin: 0;
  font-size: clamp(1.5rem, 2.9vw, 2.3rem);
  font-weight: 760;
}

.metric-label { margin: 0.2rem 0 0; color: var(--muted); }

.section { padding: 2rem 0; }
.section h2 {
  text-align: center;
  font-size: clamp(1.6rem, 3.1vw, 2.5rem);
  letter-spacing: -0.02em;
  margin: 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.card { padding: 1.4rem; }

.card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.card p,
.partner p,
.footer p { margin: 0; color: var(--muted); }

.partner {
  padding: 1.8rem;
  text-align: center;
  border-radius: 24px;
}

.partner p {
  max-width: 740px;
  margin: 0.65rem auto 0;
}

.footer {
  margin-top: 2.8rem;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.84);
  backdrop-filter: blur(8px);
  padding: 1.4rem 0 2rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer h3 { margin: 0; }

.lang-btn:hover,
.btn:hover,
.cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(61, 123, 238, 0.2);
}

@media (max-width: 900px) {
  header.hero { padding-bottom: 2.7rem; }
  section.hero { padding-top: 3.4rem; }
  h1 { max-width: 16ch; }
  .cards,
  .metrics { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .container { width: min(1120px, calc(100% - 1.25rem)); }
  header.hero { padding-top: 0.9rem; }

  .nav {
    border-radius: 18px;
    flex-wrap: wrap;
    top: 0.5rem;
    padding: 0.72rem 0.78rem;
  }

  .logo-text { font-size: 0.95rem; }
  .actions {
    width: 100%;
    justify-content: space-between;
    gap: 0.5rem;
  }

  .lang-btn,
  .cta,
  .btn {
    min-height: 42px;
    font-size: 0.9rem;
  }

  .cta {
    flex: 1;
    text-align: center;
  }

  section.hero {
    padding-top: 2.4rem;
    padding-bottom: 1.5rem;
  }

  h1 {
    font-size: clamp(1.8rem, 9.5vw, 2.35rem);
    line-height: 1.16;
    margin-top: 0.7rem;
    margin-bottom: 0.75rem;
  }

  .subtitle { font-size: 0.97rem; }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.55rem;
  }

  .hero-actions .btn {
    text-align: center;
    width: 100%;
  }

  .section { padding: 1.35rem 0; }
  .card,
  .partner,
  .metrics > div { padding: 1.05rem; }

  .footer {
    margin-top: 2rem;
    padding-bottom: 1.35rem;
  }

  .footer-inner .btn {
    width: 100%;
    text-align: center;
  }
}