/* Shared styles for 晨北科技 filing site */
:root {
  --primary: #007eb9;
  --text: #222;
  --muted: #666;
  --bg: #ffffff;
  --bg-alt: #f5f7f9;
  --border: #e4e8eb;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "PingFang SC", "Microsoft YaHei", "DejaVu Sans", "Liberation Sans", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* Header / nav */
.site-header {
  border-bottom: 1px solid var(--border);
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand-logo { font-size: 20px; font-weight: 700; color: var(--text); }
.nav a { margin-left: 24px; color: var(--text); font-size: 15px; }
.nav a:hover { color: var(--primary); }

/* Hero */
.hero {
  background: var(--bg-alt);
  padding: 72px 0;
  text-align: center;
}
.hero h1 { font-size: 34px; margin: 0 0 16px; }
.hero p { font-size: 18px; color: var(--muted); max-width: 680px; margin: 0 auto; }

/* Sections */
section { padding: 56px 0; }
section h2 { font-size: 26px; margin: 0 0 12px; }
section .lead { color: var(--muted); margin: 0 0 32px; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  background: #fff;
}
.card h3 { margin: 0 0 10px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

/* Contact list */
.info-list { list-style: none; padding: 0; margin: 0; }
.info-list li { padding: 8px 0; border-bottom: 1px solid var(--border); }
.info-list .label { display: inline-block; width: 96px; color: var(--muted); }

/* Footer + 备案 (do not remove filing info) */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 32px 0;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}
.site-footer .footer-nav a { margin: 0 12px; color: var(--muted); }
.beian { margin-top: 14px; line-height: 24px; }
.beian a {
  display: inline-block;
  text-decoration: none;
  height: 20px;
  line-height: 20px;
  color: #555;
}
.beian img { vertical-align: middle; }
.beian span { margin-left: 5px; }

@media (max-width: 720px) {
  .cards { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
  .nav a { margin-left: 14px; }
}