:root {
  --color-primary: #0f62fe;
  --color-surface: #ffffff;
  --color-text: #1f2430;
  --colorPrimary: #22d3ee;
  --space-4: 16px;
}
body{margin:0;font-family:system-ui,-apple-system,"Noto Sans SC",sans-serif;color:var(--color-text);background:var(--color-surface);line-height:1.6}
.site-header,.site-footer,main{max-width:1080px;margin:0 auto;padding:0 16px}
.site-header{display:flex;gap:24px;align-items:center;padding:16px}
.site-header nav ul{display:flex;gap:16px;list-style:none;margin:0;padding:0}
.brand a{font-weight:700;font-size:20px;color:var(--color-primary);text-decoration:none}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{position:static}
a{color:var(--color-primary)}
img{max-width:100%;height:auto}
.hero-news{display:grid;gap:16px}
@media(min-width:768px){.hero-news{grid-template-columns:2fr 1fr}}
.article-list ul,.related-articles ul{list-style:none;padding:0}
.prev-next{display:flex;justify-content:space-between;gap:16px;margin:24px 0}
.site-footer{border-top:1px solid #e2e5ec;margin-top:48px;padding:24px 16px;font-size:14px}
.site-footer nav{display:flex;gap:16px}
.tag-list{display:flex;gap:8px;list-style:none;padding:0}
.source-block{font-size:13px;color:#5b647a;margin-top:16px}