:root {
  --brand: #0f4c81;
  --brand-dark: #0a355b;
  --accent: #c45c26;
  --bg: #f3f6f9;
  --text: #1f2933;
  --muted: #62748a;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(196, 92, 38, 0.1), transparent 32%),
    linear-gradient(180deg, #f7fafc 0%, #eef3f8 100%);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 8vw;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(15,76,129,.08);
  position: sticky;
  top: 0;
  z-index: 10;
}
.logo { font-size: 22px; font-weight: 700; color: var(--brand); }
.site-nav nav { display: flex; gap: 22px; flex-wrap: wrap; }
.site-nav nav a { color: var(--muted); font-weight: 500; }
.site-nav nav a.active, .site-nav nav a:hover { color: var(--brand); }

main { min-height: calc(100vh - 160px); }
.site-footer {
  padding: 28px 8vw;
  color: var(--muted);
  border-top: 1px solid rgba(15,76,129,.08);
  display: grid;
  gap: 8px;
}

.section { padding: 48px 8vw; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 20px;
  gap: 12px;
}
.section-head h2 { margin: 0; }
.section-head a { color: var(--brand); }

.hero-slide {
  min-height: 380px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
  color: #fff;
}
.hero-copy {
  width: min(760px, 88vw);
  margin: 0 auto 48px;
  padding: 28px;
  background: linear-gradient(180deg, transparent, rgba(10,53,91,.75));
}
.hero-copy h1 { margin: 0 0 12px; font-size: clamp(28px, 4vw, 46px); }
.hero-badge {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 10px;
  border: 1px solid rgba(255,255,255,.35);
  font-size: 12px;
  letter-spacing: .08em;
}
.cta {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 18px;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
}

.grid { display: grid; gap: 18px; }
.grid-products { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.grid-articles { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.card {
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 10px 28px rgba(15,76,129,.06);
}
.card .cover { height: 150px; background: #d9e4ef center/cover no-repeat; }
.card h3, .card p { margin: 0; padding: 0 16px; }
.card h3 { padding-top: 14px; font-size: 17px; }
.card p { padding-bottom: 16px; color: var(--muted); font-size: 14px; margin-top: 8px; }

.page { padding: 40px 8vw 60px; }
.page h1 { margin: 0 0 20px; }
.toolbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  align-items: center;
}
.filters { display: flex; gap: 10px; flex-wrap: wrap; }
.filters input, .filters select, .filters button {
  height: 40px;
  border: 1px solid #d7e0ea;
  border-radius: 8px;
  padding: 0 12px;
  background: #fff;
}
.filters button {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
  cursor: pointer;
}

.list { display: grid; gap: 16px; }
.list-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 18px;
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(15,76,129,.05);
}
.list-row .thumb { min-height: 120px; background: #d9e4ef center/cover no-repeat; }
.list-row .meta { color: var(--muted); font-size: 13px; margin: 16px 16px 6px; }
.list-row h2 { margin: 0 16px 8px; font-size: 20px; }
.list-row p { margin: 0 16px 16px; color: var(--muted); }

.article-page, .content-page { max-width: 920px; margin: 0 auto; padding: 48px 8vw 72px; }
.rich { line-height: 1.85; }
.rich img { max-width: 100%; }

.faq-item {
  background: #fff;
  border-radius: 14px;
  padding: 22px 24px;
  box-shadow: 0 8px 24px rgba(15,76,129,.05);
}
.faq-item h2 { margin: 0 0 10px; font-size: 20px; }
.faq-item .summary { color: var(--muted); margin: 0; }
.faq-category {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--brand);
  font-size: 13px;
}
.faq-detail h1 { margin: 0 0 16px; font-size: clamp(26px, 4vw, 38px); }
.faq-detail .answer {
  background: #fff;
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 8px 24px rgba(15,76,129,.05);
}
.related { margin-top: 36px; }
.related ul { padding-left: 18px; }
.related a { color: var(--brand); }

.pagination, .pager { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 24px; }
.pagination a, .pagination span, .pager a, .pager span {
  padding: 8px 12px;
  background: #fff;
  border-radius: 8px;
  border: 1px solid #e5eaf0;
}
.pagination .active span, .pager .current {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}
.pager .disabled { opacity: .5; }
.qa-block { margin-top: 36px; }
.qa-block h2 { margin: 0 0 16px; font-size: 24px; }
.article-body { max-width: 920px; margin: 0 auto; }
.article-body .meta { color: var(--muted); margin-bottom: 10px; }
.article-body .desc { color: var(--muted); margin-bottom: 24px; }
.article-body .content { line-height: 1.85; background: #fff; border-radius: 16px; padding: 28px; box-shadow: 0 8px 24px rgba(15,76,129,.05); }

.disabled-wrap {
  min-height: 60vh;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 40px;
}

@media (max-width: 768px) {
  .site-nav { flex-direction: column; gap: 12px; }
  .list-row { grid-template-columns: 1fr; }
  .list-row .thumb { height: 160px; }
}