:root{--bg:#fff;--fg:#1a1a1a;--muted:#666;--line:#e6e6e6;--accent:#1f5fbf;--alt:#f6f8fb}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;color:var(--fg);background:var(--bg)}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.site-header{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(255,255,255,.95);backdrop-filter:blur(6px)}
.nav{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{font-weight:700;font-size:20px;color:var(--fg)}
.brand span{font-weight:400;color:var(--muted);margin-left:8px;font-size:14px}
nav a{margin-left:24px;color:var(--fg)}
.hero{padding:96px 0 72px;text-align:center;background:linear-gradient(180deg,var(--alt),#fff)}
.hero h1{font-size:40px;margin:0 0 16px;line-height:1.3}
.hero p{font-size:18px;color:var(--muted);max-width:640px;margin:0 auto 32px}
.btn{display:inline-block;padding:12px 28px;border-radius:6px;background:var(--accent);color:#fff}
.btn:hover{text-decoration:none;opacity:.9}
.section{padding:64px 0}
.section.alt{background:var(--alt)}
.section h2{font-size:28px;margin:0 0 24px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:24px}
.card h3{margin:0 0 4px;font-size:20px}
.card .meta{margin:0 0 12px;color:var(--muted);font-size:13px}
.card p{margin:0}
.site-footer{border-top:1px solid var(--line);padding:32px 0;color:var(--muted);font-size:14px;text-align:center}
.site-footer p{margin:4px 0}
.beian a{color:var(--muted)}
@media(max-width:640px){.hero{padding:64px 0 48px}.hero h1{font-size:28px}nav a{margin-left:14px;font-size:14px}.brand span{display:none}}
.page{padding:48px 0 64px}
.page .wrap{max-width:800px}
.page h1{font-size:32px;margin:0 0 8px}
.page h2{font-size:22px;margin:40px 0 12px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.page h3{font-size:17px;margin:24px 0 8px}
.page .meta{color:var(--muted);font-size:14px;margin:0 0 24px}
.page ul{padding-left:22px}
.page li{margin:6px 0}
.contact-card{margin:24px 0 8px}
.contact-card h2{margin-top:0;border:0;padding:0}
.contact-card .big{font-size:22px;margin:8px 0 12px}
.site-footer .links a{color:var(--muted);margin:0 8px}