*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#1a365d;--accent:#2b6cb0;--highlight:#ebf8ff;
  --text:#2d3748;--muted:#718096;--bg:#f7fafc;--card:#fff;
  --border:#e2e8f0;--radius:8px;--shadow:0 2px 12px rgba(0,0,0,.07);
  --font-body:'Georgia','Times New Roman',serif;
  --font-ui:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.75;font-size:17px}
/* Header */
.site-header{background:var(--primary);color:#fff;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,.2)}
.header-inner{max-width:1100px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:64px}
.site-logo{font-family:var(--font-ui);font-size:1.35rem;font-weight:700;color:#fff;text-decoration:none}
.site-logo span{color:#90cdf4}
.main-nav{display:flex;gap:4px;align-items:center}
.main-nav a{font-family:var(--font-ui);font-size:.85rem;font-weight:500;color:rgba(255,255,255,.85);text-decoration:none;padding:6px 12px;border-radius:4px;transition:background .2s}
.main-nav a:hover,.main-nav a.active{background:rgba(255,255,255,.15);color:#fff}
.nav-toggle{display:none;background:none;border:none;color:#fff;cursor:pointer;font-size:1.4rem;padding:8px}
/* Layout */
.site-wrapper{max-width:1100px;margin:0 auto;padding:32px 24px;display:grid;grid-template-columns:1fr 280px;gap:32px}
.site-wrapper.full{grid-template-columns:1fr;max-width:820px}
/* Hero */
.hero{background:var(--primary);color:#fff;padding:56px 24px;text-align:center}
.hero h1{font-size:2.4rem;font-weight:700;margin-bottom:12px}
.hero p{font-size:1.1rem;color:rgba(255,255,255,.8);max-width:560px;margin:0 auto}
/* Cards */
.post-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px 28px;margin-bottom:20px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s}
.post-card:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,.1)}
.post-card h2{font-size:1.25rem;margin-bottom:8px;line-height:1.3}
.post-card h2 a{color:var(--primary);text-decoration:none}
.post-card h2 a:hover{color:var(--accent)}
.post-meta{font-family:var(--font-ui);font-size:.8rem;color:var(--muted);display:flex;gap:12px;align-items:center;margin-bottom:10px;flex-wrap:wrap}
.cat-badge{background:var(--highlight);color:var(--accent);border-radius:4px;padding:2px 8px;font-size:.75rem;font-weight:600;font-family:var(--font-ui);text-decoration:none}
.post-excerpt{color:var(--muted);font-size:.95rem}
.read-more{display:inline-block;margin-top:12px;font-family:var(--font-ui);font-size:.85rem;font-weight:600;color:var(--accent);text-decoration:none;border:1.5px solid var(--accent);border-radius:4px;padding:4px 14px;transition:background .2s,color .2s}
.read-more:hover{background:var(--accent);color:#fff}
/* Article */
.article-header{margin-bottom:28px}
.article-header h1{font-size:2rem;line-height:1.25;color:var(--primary);margin-bottom:12px}
.article-body{font-size:1.05rem}
.article-body p{margin-bottom:1.2em}
.article-body h2{font-size:1.4rem;color:var(--primary);margin:1.8em 0 .6em}
.article-body h3{font-size:1.15rem;color:var(--primary);margin:1.4em 0 .5em}
.article-body img{max-width:100%;height:auto;border-radius:var(--radius);margin:16px 0}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.95rem}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 14px;text-align:left}
.article-body th{background:var(--highlight);font-family:var(--font-ui)}
.article-body blockquote{border-left:4px solid var(--accent);margin:20px 0;padding:12px 20px;background:var(--highlight);border-radius:0 var(--radius) var(--radius) 0;font-style:italic;color:var(--muted)}
.article-body ul,.article-body ol{margin:0 0 1.2em 1.5em}
.article-body li{margin-bottom:6px}
.article-body a{color:var(--accent)}
/* Sidebar */
.sidebar-widget{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin-bottom:24px;box-shadow:var(--shadow)}
.sidebar-widget h3{font-family:var(--font-ui);font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-bottom:14px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.sidebar-widget ul{list-style:none}
.sidebar-widget ul li{margin-bottom:8px}
.sidebar-widget ul li a{font-family:var(--font-ui);font-size:.9rem;color:var(--accent);text-decoration:none}
.sidebar-widget ul li a:hover{text-decoration:underline}
/* Category page */
.page-title{font-size:1.6rem;color:var(--primary);margin-bottom:8px;padding-bottom:16px;border-bottom:2px solid var(--border)}
.page-subtitle{color:var(--muted);font-family:var(--font-ui);font-size:.9rem;margin-bottom:28px}
/* Footer */
.site-footer{background:var(--primary);color:rgba(255,255,255,.6);text-align:center;padding:32px 24px;font-family:var(--font-ui);font-size:.85rem;margin-top:48px}
.site-footer a{color:rgba(255,255,255,.8)}
/* Responsive */
@media(max-width:768px){
  .site-wrapper{grid-template-columns:1fr;padding:20px 16px}
  .main-nav{display:none;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:var(--primary);padding:12px 16px;gap:4px}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .hero h1{font-size:1.7rem}
  .article-header h1{font-size:1.5rem}
}