:root {
  --ink: #0f172a;
  --muted: #475569;
  --surface: #ffffff;
  --accent: #0ea5a4;
  --accent-2: #f59e0b;
  --line: #e2e8f0;
  --bg: #f8fafc;
  --hero-a: #e0f2fe;
  --hero-b: #fef3c7;
  --hero-c: #dcfce7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: linear-gradient(160deg, var(--hero-a) 0%, var(--bg) 45%, var(--hero-c) 100%);
}

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

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

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: color-mix(in srgb, white 70%, transparent);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid;
  place-items: center;
  color: white;
  font-size: 18px;
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 20px;
  font-weight: 500;
}

.nav-links a {
  padding: 8px 10px;
  border-radius: 999px;
  transition: 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--surface);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

.hero {
  padding: 80px 0 40px;
  display: grid;
  gap: 32px;
  align-items: center;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.hero-card {
  background: var(--surface);
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
  position: relative;
  overflow: hidden;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: -40% 40% auto auto;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(14, 165, 164, 0.2), transparent 70%);
}

.hero h1 {
  font-family: "ZCOOL KuaiLe", "Noto Sans SC", sans-serif;
  font-size: clamp(32px, 4vw, 48px);
  margin: 0 0 16px;
}

.hero p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

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

.button {
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: 0.2s ease;
}

.button.primary {
  background: var(--accent);
  color: white;
  border-color: transparent;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.15);
}

.section {
  padding: 40px 0 70px;
}

.section h2 {
  font-size: clamp(24px, 3vw, 32px);
  margin-bottom: 18px;
}

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

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  padding: 22px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.05);
}

.card h3 {
  margin-top: 0;
}

.highlight {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.15);
  color: #92400e;
  font-weight: 600;
  margin-bottom: 16px;
}

.timeline {
  border-left: 2px solid var(--line);
  padding-left: 20px;
  display: grid;
  gap: 16px;
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
}

.contact-box {
  display: grid;
  gap: 12px;
  padding: 24px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(14, 165, 164, 0.12), rgba(245, 158, 11, 0.1));
}

footer {
  padding: 30px 0 40px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.hero-visual {
  border-radius: 24px;
  padding: 24px;
  background: linear-gradient(160deg, rgba(14, 165, 164, 0.15), rgba(99, 102, 241, 0.08));
  display: grid;
  gap: 18px;
}

.hero-visual .chip {
  background: var(--surface);
  border-radius: 18px;
  padding: 14px 16px;
  border: 1px solid var(--line);
}

.stats {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

.stat {
  background: var(--surface);
  border-radius: 18px;
  padding: 14px;
  border: 1px solid var(--line);
}

.stat strong {
  font-size: 22px;
}

.page-hero {
  padding: 60px 0 20px;
}

.fade-up {
  animation: fadeUp 0.8s ease both;
}

.stagger > * {
  animation: fadeUp 0.8s ease both;
}

.stagger > *:nth-child(2) { animation-delay: 0.1s; }
.stagger > *:nth-child(3) { animation-delay: 0.2s; }
.stagger > *:nth-child(4) { animation-delay: 0.3s; }

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 720px) {
  .nav {
    flex-direction: column;
    gap: 12px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding-top: 50px;
  }
}