/* ZhongXue Kids - Content Site CSS */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#1a6b4a;--primary-dark:#145538;--accent:#e8a838;
  --bg:#fff;--bg-alt:#f7f8fa;--card:#fff;
  --text:#2d3748;--text-light:#718096;--heading:#1a202c;--border:#e2e8f0;
  --link:#1a6b4a;--link-hover:#145538;
  --body-font:Georgia,'Times New Roman',serif;
  --head-font:'Segoe UI',system-ui,-apple-system,sans-serif;
  --max-w:1200px;--content-w:740px;--side-w:320px;--radius:4px;
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--body-font);color:var(--text);background:var(--bg);line-height:1.8;-webkit-font-smoothing:antialiased}
a{color:var(--link);text-decoration:none;transition:color .2s}
a:hover{color:var(--link-hover);text-decoration:underline}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4,h5,h6{font-family:var(--head-font);color:var(--heading);line-height:1.3;margin-bottom:.5em}
h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1.1rem}
p{margin-bottom:1.2em}
ul,ol{margin:0 0 1.2em 1.5em}li{margin-bottom:.4em}

.site-header{background:var(--bg);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.header-inner{max-width:var(--max-w);margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:60px}
.site-logo{font-family:var(--head-font);font-size:1.35rem;font-weight:700;color:var(--primary);text-decoration:none;display:flex;align-items:center;gap:8px}
.site-logo:hover{text-decoration:none;color:var(--primary-dark)}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{font-family:var(--head-font);font-size:.9rem;font-weight:500;color:var(--text);padding:8px 14px;border-radius:var(--radius);transition:background .2s,color .2s;text-decoration:none}
.main-nav a:hover{background:var(--bg-alt);color:var(--primary);text-decoration:none}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;font-size:1.5rem;color:var(--text)}

.breadcrumbs{max-width:var(--max-w);margin:0 auto;padding:12px 20px;font-size:.85rem;color:var(--text-light)}
.breadcrumbs a{color:var(--text-light)}.breadcrumbs a:hover{color:var(--primary)}
.breadcrumbs span{margin:0 6px}

.ad-leaderboard{max-width:var(--max-w);margin:0 auto;padding:16px 20px;text-align:center;min-height:90px;display:flex;align-items:center;justify-content:center;background:var(--bg-alt);border-bottom:1px solid var(--border)}
.ad-leaderboard .ad-slot{width:728px;max-width:100%;height:90px;background:#f0f0f0;border:1px dashed #ccc;display:flex;align-items:center;justify-content:center;font-size:.75rem;color:#999}

.site-main{max-width:var(--max-w);margin:0 auto;padding:30px 20px}
.content-with-sidebar{display:grid;grid-template-columns:1fr var(--side-w);gap:40px;align-items:start}
.content-area{min-width:0}

.sidebar{position:sticky;top:80px}
.sidebar-widget{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:24px}
.sidebar-widget h3{font-size:1rem;margin-bottom:12px;padding-bottom:8px;border-bottom:2px solid var(--primary)}
.sidebar-ad{min-height:250px;background:#f0f0f0;border:1px dashed #ccc;display:flex;align-items:center;justify-content:center;font-size:.75rem;color:#999;border-radius:var(--radius);margin-bottom:24px}
.popular-list{list-style:none;margin:0;padding:0}
.popular-list li{margin-bottom:10px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.popular-list li:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.popular-list a{font-family:var(--head-font);font-size:.9rem;font-weight:500;color:var(--text);line-height:1.4}
.popular-list a:hover{color:var(--primary);text-decoration:none}
.popular-list .post-date{font-size:.75rem;color:var(--text-light);margin-top:2px}
.category-list{list-style:none;margin:0;padding:0}
.category-list li{margin-bottom:6px}
.category-list a{font-family:var(--head-font);font-size:.9rem;color:var(--text);display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px solid var(--border)}
.category-list a:hover{color:var(--primary);text-decoration:none}
.category-list .count{font-size:.8rem;color:var(--text-light);background:var(--bg-alt);padding:1px 8px;border-radius:10px}

.featured-banner{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;padding:24px 20px;margin-bottom:30px;border-radius:var(--radius)}
.featured-banner h2{font-size:1.3rem;color:#fff;margin-bottom:6px}
.featured-banner p{font-size:.95rem;opacity:.9;margin-bottom:0}
.featured-banner a{color:var(--accent);font-weight:600}
.featured-banner a:hover{text-decoration:underline}

.article-grid{display:grid;gap:24px}
.article-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:box-shadow .2s}
.article-card:hover{box-shadow:0 2px 12px rgba(0,0,0,.08)}
.article-card .card-category{font-family:var(--head-font);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--primary);margin-bottom:8px;display:inline-block}
.article-card h2{font-size:1.25rem;margin-bottom:8px}
.article-card h2 a{color:var(--heading);text-decoration:none}
.article-card h2 a:hover{color:var(--primary)}
.article-card .card-meta{font-size:.8rem;color:var(--text-light);margin-bottom:10px}
.article-card .card-excerpt{font-size:.95rem;color:var(--text);line-height:1.6;margin-bottom:12px}
.read-more{font-family:var(--head-font);font-size:.85rem;font-weight:600;color:var(--primary)}

.article-header{margin-bottom:30px}
.article-header .article-category{font-family:var(--head-font);font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--primary);margin-bottom:8px;display:inline-block}
.article-header h1{font-size:2rem;margin-bottom:10px;line-height:1.25}
.article-header .article-meta{font-size:.85rem;color:var(--text-light)}
.article-header .article-meta span{margin-right:16px}
.ad-in-content{margin:24px 0;min-height:250px;background:#f0f0f0;border:1px dashed #ccc;display:flex;align-items:center;justify-content:center;font-size:.75rem;color:#999;border-radius:var(--radius)}
.ad-in-content.horizontal{min-height:100px}
.article-body{font-size:1.05rem;line-height:1.85;max-width:var(--content-w)}
.article-body h2{margin-top:2em;margin-bottom:.6em;font-size:1.4rem}
.article-body h3{margin-top:1.5em;margin-bottom:.5em;font-size:1.15rem}
.article-body ul,.article-body ol{margin-bottom:1.2em;padding-left:1.5em}
.article-body blockquote{border-left:4px solid var(--primary);margin:1.5em 0;padding:12px 20px;background:var(--bg-alt);border-radius:0 var(--radius) var(--radius) 0;font-style:italic;color:var(--text)}
.article-body img{border-radius:var(--radius);margin:1.5em 0}
.article-body table{width:100%;border-collapse:collapse;margin:1.5em 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(--bg-alt);font-family:var(--head-font);font-weight:600}
.cta-box{background:var(--bg-alt);border:2px solid var(--primary);border-radius:var(--radius);padding:20px 24px;margin:2em 0}
.cta-box h3{margin-top:0;color:var(--primary)}
.article-tags{margin-top:30px;padding-top:20px;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.article-tags .tag-label{font-family:var(--head-font);font-size:.85rem;font-weight:600;color:var(--text);margin-right:4px}
.article-tags a{display:inline-block;font-family:var(--head-font);font-size:.8rem;padding:4px 12px;background:var(--bg-alt);border:1px solid var(--border);border-radius:20px;color:var(--text-light);transition:all .2s}
.article-tags a:hover{background:var(--primary);color:#fff;border-color:var(--primary);text-decoration:none}
.related-articles{margin-top:40px;padding-top:30px;border-top:1px solid var(--border)}
.related-articles h3{font-size:1.2rem;margin-bottom:16px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.related-card{border:1px solid var(--border);border-radius:var(--radius);padding:16px;transition:box-shadow .2s}
.related-card:hover{box-shadow:0 2px 8px rgba(0,0,0,.08)}
.related-card h4{font-size:.95rem;margin-bottom:4px}
.related-card h4 a{color:var(--heading);text-decoration:none}
.related-card h4 a:hover{color:var(--primary)}
.related-card .card-meta{font-size:.75rem;color:var(--text-light)}

.category-header{margin-bottom:24px;padding-bottom:16px;border-bottom:2px solid var(--primary)}
.category-header h1{font-size:1.6rem}
.category-header p{color:var(--text-light);margin-bottom:0}

.home-section{margin-bottom:40px}
.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--primary)}
.section-header h2{font-size:1.25rem;margin-bottom:0}
.section-header a{font-family:var(--head-font);font-size:.85rem;font-weight:600;color:var(--primary)}
.section-header a:hover{text-decoration:underline}
.article-list-compact{list-style:none;margin:0;padding:0}
.article-list-compact li{padding:12px 0;border-bottom:1px solid var(--border)}
.article-list-compact li:last-child{border-bottom:none}
.article-list-compact a{font-family:var(--head-font);font-size:.95rem;font-weight:500;color:var(--heading);line-height:1.4}
.article-list-compact a:hover{color:var(--primary);text-decoration:none}
.article-list-compact .post-date{font-size:.75rem;color:var(--text-light);display:block;margin-top:2px}

.page-content{max-width:var(--content-w);margin:0 auto}
.page-content h1{font-size:1.8rem;margin-bottom:20px}

.site-footer{background:var(--bg-alt);border-top:1px solid var(--border);margin-top:60px;padding:40px 20px 20px}
.footer-inner{max-width:var(--max-w);margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{font-size:.9rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px;color:var(--heading)}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin-bottom:6px}
.footer-col a{font-size:.9rem;color:var(--text-light)}
.footer-col a:hover{color:var(--primary)}
.footer-col p{font-size:.9rem;color:var(--text-light);line-height:1.5}
.footer-bottom{max-width:var(--max-w);margin:0 auto;padding-top:20px;border-top:1px solid var(--border);font-size:.8rem;color:var(--text-light);text-align:center}
.footer-bottom .icp{margin-top:8px;font-size:.8rem}
.ad-leaderboard,.ad-in-content,.sidebar-ad{display:none!important}
.footer-bottom .icp a{color:var(--text-light);text-decoration:none}
.ad-leaderboard,.ad-in-content,.sidebar-ad{display:none!important}
.footer-bottom .icp a:hover{color:var(--primary);text-decoration:underline}
.ad-leaderboard,.ad-in-content,.sidebar-ad{display:none!important}

@media(max-width:960px){
  .content-with-sidebar{grid-template-columns:1fr}
  .sidebar{position:static;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
  .sidebar-ad{min-height:100px}
}
@media(max-width:768px){
  .main-nav{display:none}
  .main-nav.open{display:flex;flex-direction:column;position:absolute;top:60px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);padding:10px 20px;box-shadow:0 4px 12px rgba(0,0,0,.08)}
  .nav-toggle{display:block}
  .header-inner{position:relative}
  .article-header h1{font-size:1.5rem}
  .article-body{font-size:1rem}
  .ad-leaderboard .ad-slot{width:320px;height:50px}
  .related-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .footer-inner{grid-template-columns:1fr}
  .article-card{padding:16px}
}
@media print{
  .site-header,.site-footer,.sidebar,.ad-leaderboard,.ad-in-content,.sidebar-ad,.nav-toggle{display:none}
  .content-with-sidebar{display:block}
}

/* Pagination */
.pagination{display:flex;justify-content:center;align-items:center;gap:6px;margin:32px 0 16px;padding:16px 0;border-top:1px solid var(--border)}
.pagination a,.pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:38px;padding:0 10px;border:1px solid var(--border);border-radius:6px;font-size:.9rem;color:var(--text);text-decoration:none;transition:all .2s}
.pagination a:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.pagination .current{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:600}
.pagination .dots{border:none;color:var(--text-light)}
.pagination .page-prev,.pagination .page-next{font-weight:500}
.pagination .page-prev::before{content:"← ";font-size:.85rem}
.pagination .page-next::after{content:" →";font-size:.85rem}
@media(max-width:480px){.pagination a,.pagination span{min-width:34px;height:34px;font-size:.8rem}}

/* Hero Section */
.hero-section{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;padding:40px 20px;margin-bottom:30px;border-radius:var(--radius)}
.hero-content{max-width:var(--max-w);margin:0 auto;text-align:center}
.hero-section h1{font-size:2.2rem;color:#fff;margin-bottom:12px}
.hero-section p{font-size:1.1rem;opacity:.95;margin-bottom:24px;max-width:600px;margin-left:auto;margin-right:auto}
.hero-stats{display:flex;justify-content:center;gap:30px;flex-wrap:wrap;margin-top:30px}
.hero-stats .stat{text-align:center}
.hero-stats .stat-number{font-family:var(--head-font);font-size:2.5rem;font-weight:700;color:var(--accent);display:block;line-height:1}
.hero-stats .stat-label{font-family:var(--head-font);font-size:.85rem;color:rgba(255,255,255,.8);text-transform:uppercase;letter-spacing:.5px}
@media(max-width:640px){
  .hero-section{padding:30px 20px}
  .hero-section h1{font-size:1.6rem}
  .hero-section p{font-size:1rem}
  .hero-stats{gap:16px}
  .hero-stats .stat-number{font-size:1.8rem}
  .content-with-sidebar{grid-template-columns:1fr}
  .sidebar{position:static}
  .nav-toggle{display:block}
  .main-nav{display:none;position:absolute;top:60px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border);flex-direction:column;padding:12px 20px}
  .main-nav.active{display:flex}
}