:root{--ea-bg:#fff;--ea-text:#0f172a;--ea-muted:#475569;--ea-accent:#2563EB;--ea-line:#e2e8f0;--ea-max:1100px}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ea-text);background:var(--ea-bg);line-height:1.6}
a{color:var(--ea-accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--ea-max);margin:0 auto;padding:0 24px}
.site-header{padding:18px 0;border-bottom:1px solid var(--ea-line);margin-bottom:24px}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:24px}
.site-header .logo img{display:block;height:36px;width:auto}
.site-header nav{display:flex;gap:20px;flex-wrap:wrap}
.site-header nav a{color:var(--ea-muted);font-size:15px;font-weight:500}
.site-header nav a:hover{color:var(--ea-accent)}
.breadcrumb{font-size:14px;color:var(--ea-muted);margin:0 0 18px}
.breadcrumb a{color:var(--ea-muted)}
.breadcrumb a:hover{color:var(--ea-accent)}
.article-detail{padding:24px 0 60px}
.article-detail h1{font-size:32px;line-height:1.25;margin:0 0 16px;font-weight:700;letter-spacing:-.02em}
.article-detail .lead{font-size:18px;color:var(--ea-muted);margin:0 0 28px}
.article-detail article{max-width:760px}
.article-detail article p{margin:0 0 18px}
.article-detail article h2{font-size:24px;margin:36px 0 14px}
.article-detail article h3{font-size:20px;margin:28px 0 12px}
.article-detail article ul,.article-detail article ol{margin:0 0 18px;padding-left:24px}
.article-detail article img{max-width:100%;height:auto;border-radius:10px}
.site-footer{border-top:1px solid var(--ea-line);padding:30px 0;margin-top:40px;font-size:14px;color:var(--ea-muted)}
@media(max-width:768px){
.container{padding:0 18px}
.site-header .container{flex-direction:column;align-items:flex-start;gap:12px}
.site-header nav{gap:14px}
.article-detail h1{font-size:26px}
}