*{box-sizing:border-box;margin:0;padding:0}
:root{--ink:#15202b;--muted:#5b6b7c;--line:#e3e9ef;--acc:#0a5cd6;--bg:#ffffff;--soft:#f5f8fb}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75}
a{color:var(--acc);text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
header{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);z-index:9}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:.5px}
.brand .dot{width:10px;height:10px;border-radius:3px;background:var(--acc);display:inline-block}
.nav .links a{margin-left:20px;color:var(--muted);font-size:14px}
.nav .links a:hover{color:var(--ink)}
.hero{background:linear-gradient(135deg,#f7fafd,#eef4fb 60%,#e8f0fa);padding:74px 0 66px}
.hero h1{font-size:40px;line-height:1.25;letter-spacing:1px}
.hero p.sub{color:var(--muted);font-size:17px;margin-top:14px}
.hero .cta{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 26px;border-radius:8px;font-size:15px;border:1px solid var(--line)}
.btn.p{background:var(--acc);color:#fff;border-color:var(--acc)}
.btn.g{background:#fff;color:var(--ink)}
h2.sec{font-size:26px;margin:52px 0 6px}
p.sec-sub{color:var(--muted);margin-bottom:22px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.card{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;display:flex;flex-direction:column;transition:.18s}
.card:hover{box-shadow:0 8px 26px rgba(16,40,70,.10);transform:translateY(-2px)}
.card img{width:100%;height:172px;object-fit:cover;background:var(--soft)}
.card .b{padding:14px 16px 18px}
.card h3{font-size:15.5px;line-height:1.5;font-weight:600}
.card .tag{display:inline-block;font-size:12px;color:var(--acc);background:#eef4fd;border-radius:5px;padding:2px 8px;margin-bottom:8px}
footer{margin-top:70px;border-top:1px solid var(--line);background:var(--soft);padding:34px 0;color:var(--muted);font-size:14px}
article{max-width:820px;margin:0 auto;padding:44px 22px 20px}
article h1{font-size:30px;line-height:1.35;margin-bottom:8px}
article .meta{color:var(--muted);font-size:13px;margin-bottom:26px;padding-bottom:16px;border-bottom:1px solid var(--line)}
article h2{font-size:21px;margin:32px 0 10px;padding-left:10px;border-left:4px solid var(--acc)}
article h3{font-size:17px;margin:24px 0 8px}
article p{margin:12px 0}
article ul{margin:12px 0 12px 22px}
article li{margin:6px 0}
article hr{border:0;border-top:1px solid var(--line);margin:26px 0}
article strong{color:#0d3f86}
article code{background:#f1f5f9;padding:1px 6px;border-radius:4px;font-size:.92em}
.crumb{font-size:13px;color:var(--muted);margin-bottom:18px}
.list-nav{display:flex;gap:18px;flex-wrap:wrap;margin:14px 0 30px;font-size:14px}
.pill{border:1px solid var(--line);border-radius:20px;padding:6px 14px;color:var(--muted);background:#fff}
.pill.on{background:var(--acc);color:#fff;border-color:var(--acc)}