/* ============================================================
 * _base.css —— 16 个页面族共有的外壳样式
 * 自动抽取自 05-原型（59 个 HTML 的 <style>），请勿手改；
 * 改原型后重跑 tools/extract_fam_css.py
 * 规则数：26
 * ============================================================ */

*{margin:0;padding:0;box-sizing:border-box}
.hdr{background:var(--white);padding:10px 0;border-bottom:2px solid var(--blue);position:relative;z-index:50}
.hdr-inner{display:flex;justify-content:space-between;align-items:center;max-width:1100px;margin:0 auto;padding:0 24px}
.hdr img{height:104px;width:auto;display:block}
.hdr nav{display:flex;align-items:center}
.nav-item{position:relative}
.nav-item>a{color:var(--blue-darker);text-decoration:none;font-size:14px;font-weight:600;margin-left:18px;font-family:Arial,sans-serif;display:inline-block;padding:8px 0}
.nav-item>a .caret{font-size:9px;color:var(--muted);margin-left:3px}
.nav-item>a:hover{color:var(--blue)}
.hdr-cta{color:var(--red);font-weight:700;text-decoration:none;font-size:14px;margin-left:18px;font-family:Arial,sans-serif;padding:8px 0;display:inline-block}
.dropdown{display:none;position:absolute;top:100%;left:18px;background:var(--white);border:1px solid var(--line);border-top:2px solid var(--blue);border-radius:0 0 6px 6px;min-width:240px;box-shadow:0 8px 20px rgba(10,61,143,.12);padding:8px 0}
.nav-item:hover .dropdown{display:block}
.dropdown a{display:block;color:var(--blue-darker);text-decoration:none;font-size:13px;font-family:Arial,sans-serif;padding:7px 18px}
.dropdown a:hover{background:var(--paper)}
.dropdown .dd-sep{border-top:1px solid var(--line);margin:6px 0}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:4px;padding:6px 10px;cursor:pointer;font-size:16px;color:var(--blue-darker);font-family:Arial,sans-serif}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.foot-brand p{margin:0}
.foot-col h4{color:#fff;font-size:13px;font-weight:700;margin:0 0 14px;font-family:Arial,sans-serif}
.foot-col a{display:block;color:#b3d1f2;text-decoration:none;font-size:12px;padding:4px 0;transition:color .15s}
.foot-col a:hover{color:#fff}
.foot-bottom{border-top:1px solid rgba(255,255,255,.15);padding-top:16px;text-align:center;font-size:11px;color:rgba(255,255,255,.4)}
.m-nav{display:none;background:var(--white);border-bottom:1px solid var(--line);padding:12px 24px 16px;font-family:Arial,sans-serif}
.m-nav a{display:block;color:var(--blue-darker);text-decoration:none;font-size:14px;padding:8px 0;border-bottom:1px solid var(--paper)}
.m-nav .m-sub{padding-left:16px;font-size:13px;color:var(--muted)}
.m-nav .m-cta{color:var(--red);font-weight:700;border-bottom:none}