/* 牛码编标平台 · 知识库文章通用样式（轻量、无依赖、可读优先） */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  color: #1f2937; background: #f7f9fc; line-height: 1.85; font-size: 16px;
}
.ba-top {
  background: #0d1524; color: #e9f0f9; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.ba-top .brand { font-weight: 700; font-size: 17px; color: #fff; text-decoration: none; }
.ba-top .brand em { font-style: normal; color: #5eead4; }
.ba-top nav a { color: #93a7be; text-decoration: none; margin-left: 18px; font-size: 14px; }
.ba-top nav a:hover { color: #fff; }
.ba-hero { background: linear-gradient(135deg, #0d1524, #16233c); color: #e9f0f9; padding: 48px 24px 40px; }
.ba-hero .inner { max-width: 860px; margin: 0 auto; }
.ba-kicker {
  display: inline-block; font-size: 13px; letter-spacing: 2px; color: #5eead4;
  border: 1px solid rgba(94,234,212,.35); border-radius: 999px; padding: 3px 14px; margin-bottom: 16px;
}
.ba-hero h1 { font-size: 30px; line-height: 1.4; max-width: 760px; }
.ba-meta { margin-top: 14px; color: #93a7be; font-size: 13px; }
main { max-width: 860px; margin: 0 auto; padding: 36px 24px 24px; }
article {
  background: #fff; border: 1px solid #e5eaf2; border-radius: 14px; padding: 40px 44px;
  box-shadow: 0 4px 24px rgba(13,21,36,.05);
}
article h2 {
  font-size: 22px; margin: 40px 0 14px; padding-left: 12px;
  border-left: 4px solid #2563eb; color: #0d1524;
}
article h2:first-child { margin-top: 8px; }
article h3 { font-size: 18px; margin: 26px 0 10px; color: #0d1524; }
article p { margin: 12px 0; }
article ul, article ol { margin: 12px 0 12px 24px; }
article li { margin: 6px 0; }
article strong { color: #0d1524; }
article blockquote {
  margin: 18px 0; padding: 14px 18px; background: #f0f6ff;
  border-left: 4px solid #5b9bea; border-radius: 6px; color: #2c4a72;
}
article table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14.5px; }
article th, article td { border: 1px solid #e5eaf2; padding: 10px 12px; text-align: left; }
article th { background: #f0f6ff; color: #0d1524; }
article img { max-width: 100%; border-radius: 10px; border: 1px solid #e5eaf2; }
.ba-cta {
  margin: 36px 0 8px; padding: 22px 26px; border-radius: 12px;
  background: linear-gradient(135deg, #1d4ed8, #2563eb); color: #fff;
}
.ba-cta h3 { color: #fff; margin: 0 0 8px; }
.ba-cta p { margin: 0 0 14px; color: #dbeafe; font-size: 14.5px; }
.ba-cta a {
  display: inline-block; background: #5eead4; color: #0d1524; font-weight: 700;
  padding: 10px 26px; border-radius: 8px; text-decoration: none; font-size: 15px;
}
.ba-related { max-width: 860px; margin: 28px auto 0; padding: 0 24px; }
.ba-related h3 { font-size: 16px; color: #46607f; margin-bottom: 12px; }
.ba-related .cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.ba-related a {
  display: block; background: #fff; border: 1px solid #e5eaf2; border-radius: 10px;
  padding: 14px 16px; text-decoration: none; color: #1f2937; font-size: 14.5px; font-weight: 600;
}
.ba-related a:hover { border-color: #5b9bea; color: #1d4ed8; }
.ba-related a span { display: block; font-weight: 400; color: #7b8ea6; font-size: 13px; margin-top: 4px; }
footer.ba-foot {
  max-width: 860px; margin: 40px auto 0; padding: 20px 24px 44px;
  color: #93a7be; font-size: 13px; text-align: center;
}
footer.ba-foot a { color: #5b9bea; text-decoration: none; }
@media (max-width: 640px) {
  article { padding: 26px 20px; }
  .ba-hero h1 { font-size: 23px; }
}