:root {
  --ink: #101827;
  --muted: #53617a;
  --accent: #1c5d8f;
  --accent-2: #34a6a8;
  --bg: #f6f8fb;
  --card: #ffffff;
  --border: #d8e0ea;
  --shadow: 0 28px 60px rgba(19, 39, 71, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 20% 10%, #e8f0ff, transparent 40%),
    radial-gradient(circle at 80% 0%, #e0f7f5, transparent 50%),
    var(--bg);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 6vw;
  background: rgba(246, 248, 251, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo strong { font-size: 16px; display: block; }
.logo span { color: var(--muted); font-size: 12px; letter-spacing: 0.08em; }

.mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: inset 0 0 0 4px rgba(255, 255, 255, 0.4);
}

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

.nav a {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.nav a:hover,
.nav a.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(28, 93, 143, 0.08);
}

.hero {
  padding: 56px 6vw 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 12px;
  color: var(--muted);
}

.hero-text h1 {
  font-size: clamp(30px, 4vw, 44px);
  margin: 12px 0 16px;
}

.lead {
  color: var(--muted);
  line-height: 1.7;
}

.hero-actions {
  margin-top: 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.btn.primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 14px 26px rgba(28, 93, 143, 0.28);
}

.btn.primary:hover { transform: translateY(-2px); }

.btn.ghost {
  color: var(--accent);
  background: transparent;
}

.hero-card {
  background: var(--card);
  border-radius: 22px;
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.section {
  padding: 32px 6vw;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 16px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.card span {
  font-size: 12px;
  color: var(--muted);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill-list span {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 14px;
}

.contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  align-items: center;
  gap: 24px;
}

.contact-card {
  background: var(--card);
  border-radius: 20px;
  border: 1px solid var(--border);
  padding: 20px;
  display: grid;
  gap: 12px;
}

.contact-card strong {
  display: block;
  font-size: 13px;
  color: var(--muted);
}

.footer {
  padding: 24px 6vw 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

@media (max-width: 800px) {
  .nav { flex-wrap: wrap; justify-content: flex-end; }
}