:root {
  --blue: #0b3d91;
  --blue-light: #1456b8;
  --steel: #4682b4;
  --text: #1a1a2e;
  --muted: #5a6270;
  --bg: #ffffff;
  --bg-muted: #f4f7fb;
  --border: #dbe3ef;
  --radius: 10px;
  --shadow: 0 8px 24px rgba(11, 61, 145, 0.08);
  --container: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-light); }

.container { width: min(var(--container), calc(100% - 2rem)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; gap: 1rem;
}
.brand { display: flex; flex-direction: column; color: inherit; }
.brand-name { font-size: 1.15rem; font-weight: 700; color: var(--blue); }
.brand-sub { font-size: .78rem; color: var(--muted); }

.nav-toggle {
  display: none; border: 1px solid var(--border); background: #fff;
  font-size: 1.25rem; padding: .35rem .55rem; border-radius: 6px; cursor: pointer;
}
.site-nav { display: flex; flex-wrap: wrap; gap: .25rem 1rem; align-items: center; }
.site-nav a {
  color: var(--text); font-size: .92rem; padding: .35rem 0;
  border-bottom: 2px solid transparent;
}
.site-nav a.active, .site-nav a:hover { color: var(--blue); border-bottom-color: var(--steel); }

.site-main { min-height: 50vh; }
.section { padding: 3rem 0; }
.section-muted { background: var(--bg-muted); }
.section-head {
  display: flex; justify-content: space-between; align-items: end;
  gap: 1rem; margin-bottom: 1.5rem;
}
.section-head h2 { margin: 0; color: var(--blue); font-size: 1.6rem; }
.more-link { font-size: .92rem; white-space: nowrap; }

.page-hero {
  background: linear-gradient(135deg, var(--blue) 0%, var(--steel) 100%);
  color: #fff; padding: 2.5rem 0;
}
.page-hero h1 { margin: 0 0 .35rem; font-size: clamp(1.5rem, 3vw, 2rem); }
.page-hero p { margin: 0; opacity: .9; }
.breadcrumb { font-size: .85rem; margin-bottom: .75rem; opacity: .85; }
.breadcrumb a { color: #fff; }
.meta { margin: .5rem 0 0; font-size: .88rem; opacity: .85; }

.hero { background: linear-gradient(180deg, #eef4fb 0%, #fff 100%); padding: 3rem 0; }
.hero-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 2rem; align-items: center;
}
.hero-copy { animation: fade-up .7s ease both; }
.hero-visual { animation: fade-up .7s ease .12s both; }
@keyframes fade-up {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
.hero-kicker { color: var(--steel); font-weight: 600; margin: 0 0 .5rem; }
.hero h1 { margin: 0 0 .75rem; font-size: clamp(1.8rem, 4vw, 2.5rem); color: var(--blue); line-height: 1.2; }
.hero-lead { color: var(--muted); margin: 0 0 1.25rem; max-width: 36rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.hero-visual img { border-radius: var(--radius); box-shadow: var(--shadow); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .65rem 1.2rem; border-radius: 6px; font-weight: 600;
  border: 2px solid transparent; cursor: pointer; transition: .2s ease;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-light); color: #fff; }
.btn-outline { border-color: var(--blue); color: var(--blue); background: transparent; }
.btn-outline:hover { background: var(--blue); color: #fff; }
.btn-light { background: #fff; color: var(--blue); }
.btn-light:hover { background: #eef4fb; color: var(--blue); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}
.product-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); transition: transform .2s ease;
}
.product-card:hover { transform: translateY(-3px); }
.product-card a { color: inherit; display: block; }
.product-card img { aspect-ratio: 4/3; object-fit: cover; background: #f0f4f8; }
.product-card h3 { margin: .85rem 1rem .35rem; font-size: 1rem; color: var(--blue); }
.product-card p {
  margin: 0 1rem 1rem; font-size: .88rem; color: var(--muted);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem;
}
.feature-item {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.25rem; box-shadow: var(--shadow);
}
.feature-item h3 { margin: 0 0 .5rem; color: var(--blue); font-size: 1.05rem; }
.feature-item p { margin: 0; color: var(--muted); font-size: .92rem; }

.news-list { list-style: none; margin: 0; padding: 0; }
.news-list li { border-bottom: 1px solid var(--border); }
.news-list a {
  display: flex; justify-content: space-between; gap: 1rem;
  padding: .85rem 0; color: inherit;
}
.news-list a:hover span { color: var(--blue); }
.news-list time { color: var(--muted); font-size: .88rem; white-space: nowrap; }

.cta-strip { background: var(--blue); color: #fff; padding: 2rem 0; }
.cta-inner { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.cta-inner h2 { margin: 0 0 .35rem; }
.cta-inner p { margin: 0; opacity: .9; }

.layout-with-sidebar {
  display: grid; grid-template-columns: 220px 1fr; gap: 1.5rem; align-items: start;
}
.sidebar {
  background: var(--bg-muted); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem;
}
.sidebar h3 { margin: 0 0 .75rem; font-size: 1rem; color: var(--blue); }
.cat-list { list-style: none; margin: 0; padding: 0; }
.cat-list a {
  display: block; padding: .45rem .5rem; border-radius: 6px; color: var(--text);
}
.cat-list a.active, .cat-list a:hover { background: #fff; color: var(--blue); }

.prose { max-width: 100%; overflow-wrap: anywhere; }
.prose img, .prose table { max-width: 100%; height: auto; }
.prose table { display: block; overflow-x: auto; }

.article-list { list-style: none; margin: 0; padding: 0; }
.article-item {
  display: flex; justify-content: space-between; gap: 1rem; align-items: center;
  padding: 1rem 0; border-bottom: 1px solid var(--border);
}
.article-item h2 { margin: 0 0 .35rem; font-size: 1.1rem; }
.article-item p {
  margin: 0 0 .35rem; color: var(--muted); font-size: .92rem;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.article-item time { font-size: .85rem; color: var(--muted); }

.guestbook-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.guest-form label { display: block; margin-bottom: .75rem; font-size: .92rem; }
.guest-form input, .guest-form textarea {
  width: 100%; margin-top: .35rem; padding: .6rem .7rem;
  border: 1px solid var(--border); border-radius: 6px; font: inherit;
}
.captcha-row { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; }
.captcha-img { height: 32px; border: 1px solid var(--border); border-radius: 4px; cursor: pointer; }
.guest-list { list-style: none; margin: 0; padding: 0; }
.guest-list li {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem; margin-bottom: .75rem; background: var(--bg-muted);
}
.guest-head { display: flex; justify-content: space-between; gap: .5rem; margin-bottom: .35rem; }
.guest-title { font-weight: 600; margin-bottom: .35rem; }
.guest-reply { margin-top: .75rem; padding-top: .75rem; border-top: 1px dashed var(--border); color: var(--blue); }

.contact-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 1.25rem; }
.contact-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.5rem; box-shadow: var(--shadow);
}
.contact-list div { display: grid; grid-template-columns: 4rem 1fr; gap: .5rem; padding: .5rem 0; border-bottom: 1px solid var(--border); }
.contact-list dt { margin: 0; color: var(--muted); }
.contact-list dd { margin: 0; }

.pager { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .75rem; margin-top: 1.5rem; }
.pager-info { color: var(--muted); font-size: .9rem; }
.pager-links { display: flex; gap: .5rem; flex-wrap: wrap; }
.pager-btn {
  padding: .4rem .75rem; border: 1px solid var(--border); border-radius: 6px;
  background: #fff; color: var(--blue);
}
.pager-btn:hover { background: var(--bg-muted); }

.empty-msg, .empty-state { color: var(--muted); text-align: center; padding: 2rem 0; }
.empty-state h1 { font-size: 3rem; color: var(--blue); margin: 0 0 .5rem; }

.site-footer { background: #0a2f6e; color: #dce8f8; margin-top: 2rem; }
.footer-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem; padding: 2rem 0 1rem;
}
.footer-grid a { color: #dce8f8; }
.footer-copy { border-top: 1px solid rgba(255,255,255,.12); padding: 1rem 0 1.5rem; font-size: .85rem; opacity: .85; }

@media (max-width: 900px) {
  .hero-grid, .layout-with-sidebar, .guestbook-grid, .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    display: none; position: absolute; left: 0; right: 0; top: 64px;
    background: #fff; border-bottom: 1px solid var(--border); padding: .75rem 1rem 1rem;
    flex-direction: column; align-items: stretch;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: .55rem 0; border-bottom: 1px solid var(--border); }
  .header-inner { position: relative; }
  .article-item { flex-direction: column; align-items: flex-start; }
}