/* 第1套：居中双栏 · 海军蓝企业站 */
:root {
  --ink: #1a365d;
  --ink-2: #2c5282;
  --line: #c5d4e8;
  --paper: #f4f7fb;
  --accent: #1d4e89;
  --btn: #c53030;
  --btn-hover: #9b2c2c;
  --ok: #276749;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #1a202c;
  background: var(--paper);
  line-height: 1.75;
  font-size: 16px;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: min(1080px, calc(100% - 32px)); margin: 0 auto; }

.topbar {
  background: #fff;
  border-bottom: 3px solid var(--ink);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.02em;
}
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 8px; }
.nav a {
  padding: 8px 16px;
  color: var(--ink-2);
  border-radius: 4px;
  font-weight: 600;
}
.nav a.is-on {
  background: var(--ink);
  color: #fff;
}
.nav a.is-on:hover { text-decoration: none; }

.hero-band {
  background: linear-gradient(160deg, #1a365d 0%, #2b6cb0 70%, #3182ce 100%);
  color: #fff;
  padding: 48px 0 56px;
}
.hero-band h1 {
  margin: 0 0 16px;
  font-size: 34px;
  line-height: 1.3;
  font-weight: 700;
}
.hero-lead { margin: 0 0 22px; font-size: 18px; max-width: 46em; opacity: 0.95; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn-main, .btn-sub {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 16px;
}
.btn-main {
  background: var(--btn);
  color: #fff;
}
.btn-main:hover { background: var(--btn-hover); text-decoration: none; color: #fff; }
.btn-sub {
  background: #fff;
  color: var(--ink);
}
.btn-sub:hover { text-decoration: none; background: #edf2f7; }

.layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 28px;
  padding: 36px 0 48px;
}
.panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px 24px 26px;
  margin-bottom: 22px;
}
.panel h2 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: 22px;
  border-left: 4px solid var(--btn);
  padding-left: 12px;
}
.panel p { margin: 0 0 12px; }
.feat-list { margin: 0; padding: 0; list-style: none; }
.feat-list li {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}
.feat-list li:last-child { border-bottom: 0; }
.side-dl {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  position: sticky;
  top: 16px;
}
.side-dl h2 { font-size: 18px; margin: 0 0 12px; color: var(--ink); }
.side-dl .btn-main { width: 100%; justify-content: center; margin-bottom: 8px; }
.side-dl p { font-size: 14px; margin: 0 0 10px; color: #4a5568; }

.prod-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.prod-table th, .prod-table td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
}
.prod-table th { background: #e8eef7; color: var(--ink); }

.news-list { margin: 0; padding: 0; list-style: none; }
.news-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.news-list .t { font-weight: 700; color: var(--ink); }
.news-list .d { color: #718096; font-size: 13px; margin-left: 8px; }
.news-list p { margin: 6px 0 0; color: #4a5568; }

.quote {
  background: #edf2f7;
  border-left: 4px solid var(--ok);
  padding: 12px 16px;
  margin: 0 0 12px;
}
.faq-block dt {
  font-weight: 700;
  color: var(--ink);
  margin: 16px 0 6px;
}
.faq-block dd { margin: 0 0 8px; color: #2d3748; }

.foot {
  background: var(--ink);
  color: #e2e8f0;
  padding: 28px 0 36px;
  font-size: 14px;
}
.foot p { margin: 0 0 8px; }
.foot strong { color: #fff; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .hero-band h1 { font-size: 26px; }
  .topbar-inner { flex-direction: column; align-items: flex-start; }
}