:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --brand: #0f766e;
  --brand-dark: #115e59;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
}

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

.container {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(180%) blur(8px);
}

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

.brand {
  font-size: 22px;
  font-weight: 700;
  color: var(--brand-dark);
  letter-spacing: 1px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.main-nav a {
  color: #1e293b;
  font-size: 14px;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}

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

.main-nav a.is-active {
  color: var(--brand-dark);
  border-bottom-color: var(--brand);
  font-weight: 700;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--brand-dark);
}

.hero {
  background: radial-gradient(circle at top right, #ccfbf1 0%, #f8fafc 45%, #f8fafc 100%);
  border-bottom: 1px solid var(--line);
}

.hero-content {
  padding: 68px 0 54px;
}

.hero-kicker {
  margin: 0 0 8px;
  color: var(--brand);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 1px;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.3;
}

h2 {
  margin: 0 0 22px;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.35;
}

h3 {
  margin: 0 0 8px;
  font-size: 22px;
  line-height: 1.45;
}

p {
  margin: 0 0 14px;
  color: var(--muted);
}

.section {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}

.section-alt {
  background: #f1f5f9;
}

.product-item,
.news-item,
.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 18px 14px;
  margin-bottom: 14px;
}

.news-item .meta {
  font-size: 13px;
  color: #64748b;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  color: #0b3e3a;
}

.faq-item p {
  margin-top: 10px;
}

.contact-list,
.record-list {
  margin: 0;
  padding-left: 20px;
  color: #1e293b;
}

.site-footer {
  background: #0b1220;
  color: #cbd5e1;
}

.footer-content {
  padding: 26px 0 34px;
}

.footer-content p {
  color: #cbd5e1;
  margin-bottom: 6px;
}

.page-main {
  animation: pageFadeIn 260ms ease;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.quick-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}

.quick-card h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

.quick-card p {
  margin-bottom: 10px;
}

.quick-card a {
  font-size: 14px;
  color: var(--brand-dark);
  font-weight: 700;
}

@media (max-width: 900px) {
  .nav-wrap {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0;
  }

  .main-nav {
    gap: 12px;
  }

  .quick-grid {
    grid-template-columns: 1fr;
  }
}