*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#eff6ff;--text:#1f2937;--text-light:#6b7280;--text-muted:#9ca3af;--bg:#f8fafc;--bg-white:#ffffff;--border:#e5e7eb;--shadow:0 1px 3px rgba(0,0,0,.08);--shadow-lg:0 4px 12px rgba(0,0,0,.1);--radius:8px;--max-width:1200px}

html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.6;min-height:100vh}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto}
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:var(--bg-white);box-shadow:var(--shadow);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.site-logo h1{font-size:22px;color:var(--text);font-weight:700;letter-spacing:-.5px}
.header-right{display:flex;align-items:center;gap:16px}
.search-form{display:flex;align-items:center}
.search-input{border:1px solid var(--border);border-radius:var(--radius) 0 0 var(--radius);padding:7px 14px;font-size:14px;width:200px;outline:none;transition:border-color .2s}
.search-input:focus{border-color:var(--primary)}
.search-btn{background:var(--primary);color:#fff;border:none;padding:7px 16px;border-radius:0 var(--radius) var(--radius) 0;cursor:pointer;font-size:14px;transition:background .2s}
.search-btn:hover{background:var(--primary-dark)}

/* Nav */
.site-nav{background:var(--bg-white);border-bottom:1px solid var(--border)}
.nav-list{display:flex;list-style:none;gap:4px;overflow-x:auto}
.nav-list li a{display:block;padding:12px 20px;font-size:15px;color:var(--text-light);border-bottom:2px solid transparent;transition:all .2s;white-space:nowrap}
.nav-list li a:hover,.nav-list li.active a{color:var(--primary);border-bottom-color:var(--primary)}

/* Main */
.site-main{padding:24px 0 48px;min-height:60vh}

/* Hero */
.hero-slider{display:flex;gap:16px;margin-bottom:28px;background:var(--bg-white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.hero-main{flex:1.5;position:relative;min-height:300px}
.hero-main .hero-link{display:flex;flex-direction:column;height:100%}
.hero-img img{width:100%;height:220px;object-fit:cover}
.hero-text{padding:16px 20px;flex:1}
.hero-main h2{font-size:20px;font-weight:700;color:var(--text);margin-bottom:8px;line-height:1.4}
.hero-main p{font-size:14px;color:var(--text-light);margin-bottom:8px}
.hero-time{font-size:12px;color:var(--text-muted)}
.hero-side{flex:1;display:flex;flex-direction:column;padding:12px;gap:4px}
.hero-side-item{padding:10px 8px;border-radius:4px;transition:background .2s}
.hero-side-item:hover{background:var(--primary-light)}
.hero-side-item h3{font-size:14px;font-weight:600;color:var(--text);margin-bottom:4px;line-height:1.4}
.hero-side-item span{font-size:12px;color:var(--text-muted)}

/* Content Layout */
.content-layout{display:grid;grid-template-columns:1fr 320px;gap:24px}
.content-main{min-width:0}
.content-sidebar{min-width:0}

/* Section */
.section-header{margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--primary)}
.section-header h2{font-size:20px;font-weight:700}

/* Article List */
.article-list{display:flex;flex-direction:column;gap:0}
.article-item{background:var(--bg-white);border-bottom:1px solid var(--border);transition:box-shadow .2s}
.article-item:hover{box-shadow:var(--shadow)}
.article-item:first-child{border-radius:var(--radius) var(--radius) 0 0}
.article-item:last-child{border-radius:0 0 var(--radius) var(--radius);border-bottom:none}
.article-item-inner{display:flex;gap:16px;padding:16px}
.article-thumb{width:200px;height:130px;overflow:hidden;border-radius:var(--radius);flex-shrink:0}
.article-thumb img{width:100%;height:100%;object-fit:cover}
.article-info{flex:1;min-width:0}
.article-info h3{margin-bottom:8px}
.article-info h3 a{font-size:18px;font-weight:600;color:var(--text);line-height:1.4}
.article-info h3 a:hover{color:var(--primary)}
.article-summary{font-size:14px;color:var(--text-light);margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-meta{display:flex;gap:16px;font-size:13px;color:var(--text-muted)}

/* Badges */
.badge{display:inline-block;padding:1px 8px;font-size:12px;border-radius:3px;vertical-align:middle;margin-left:6px}
.badge-original{background:#ecfdf5;color:#065f46}
.badge-ai{background:#eff6ff;color:#1d4ed8}

/* Pagination */
.pagination{text-align:center;margin-top:24px}
.pagination ul{display:inline-flex;list-style:none;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.pagination li a,.pagination li span{display:block;padding:8px 16px;font-size:14px;background:var(--bg-white);color:var(--text);border-left:1px solid var(--border)}
.pagination li:first-child a,.pagination li:first-child span{border-left:none}
.pagination li span.active{background:var(--primary);color:#fff;font-weight:600}
.pagination li a:hover{background:var(--primary-light);color:var(--primary)}

/* Sidebar */
.sidebar-widget{background:var(--bg-white);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:16px}
.widget-title{font-size:16px;font-weight:700;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.widget-list{list-style:none}
.widget-list li{margin-bottom:8px}
.widget-list li a{font-size:14px;color:var(--text);display:block;line-height:1.4}
.widget-list li a:hover{color:var(--primary)}
.widget-list li a.active{color:var(--primary);font-weight:600}
.widget-list li span{font-size:12px;color:var(--text-muted);display:block}
.hot-list{counter-reset:hot}
.hot-list li{counter-increment:hot;display:flex;justify-content:space-between;align-items:center}
.hot-list li::before{content:counter(hot);background:var(--text-muted);color:#fff;width:18px;height:18px;display:inline-flex;align-items:center;justify-content:center;border-radius:3px;font-size:11px;margin-right:8px;flex-shrink:0}
.hot-list li:nth-child(1)::before,.hot-list li:nth-child(2)::before,.hot-list li:nth-child(3)::before{background:#ef4444}
.hot-list li a{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hot-count{font-size:12px;color:var(--text-muted);flex-shrink:0;margin-left:8px}

/* Article Detail */
.article-detail{padding:20px}
.article-detail-header{margin-bottom:20px}
.breadcrumb{font-size:13px;color:var(--text-muted);margin-bottom:12px}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{margin:0 6px}
.article-detail-title{font-size:26px;font-weight:800;line-height:1.4;margin-bottom:14px;color:var(--text)}
.article-detail-meta{display:flex;gap:16px;font-size:13px;color:var(--text-light);flex-wrap:wrap;align-items:center}
.article-keywords{margin-top:10px;font-size:13px;color:var(--text-light)}
.article-keywords a{display:inline-block;margin:2px 4px;padding:2px 10px;background:var(--primary-light);border-radius:12px;font-size:12px}
.article-detail-content{font-size:15px;line-height:2;color:#333;word-wrap:break-word}
.article-detail-content h2,.article-detail-content h3,.article-detail-content h4{margin:24px 0 14px;color:#222}
.article-detail-content p{margin-bottom:16px}
.article-detail-content ul,.article-detail-content ol{margin-bottom:16px;padding-left:24px}
.article-detail-content img{max-width:100%;border-radius:var(--radius);margin:16px 0}
.article-detail-content blockquote{border-left:3px solid var(--primary);padding:10px 16px;margin:16px 0;background:var(--primary-light);border-radius:0 var(--radius) var(--radius) 0}
.article-detail-footer{margin-top:30px;padding-top:16px;border-top:1px solid var(--border)}
.article-pagination{display:flex;justify-content:space-between;gap:16px}
.article-prev,.article-next{color:var(--text);font-size:14px;padding:8px 12px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);flex:1;text-align:center;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-prev:hover,.article-next:hover{background:var(--primary-light);border-color:var(--primary)}

/* Related Articles */
.related-articles{margin-top:32px}
.related-articles h3{font-size:18px;font-weight:700;margin-bottom:14px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.related-item{background:var(--bg-white);padding:14px;border-radius:var(--radius);box-shadow:var(--shadow);transition:box-shadow .2s}
.related-item:hover{box-shadow:var(--shadow-lg)}
.related-item h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:6px}
.related-item p{font-size:13px;color:var(--text-light);margin-bottom:6px}
.related-item span{font-size:12px;color:var(--text-muted)}

/* Category */
.category-header{margin-bottom:12px}
.category-title{font-size:24px;font-weight:700}
.category-desc{font-size:14px;color:var(--text-light);margin-top:4px}
.category-tabs{margin-bottom:20px;background:var(--bg-white);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.category-tab-list{display:flex;list-style:none;overflow-x:auto;padding:0}
.category-tab-list li{border-right:1px solid var(--border)}
.category-tab-list li a{display:block;padding:12px 24px;font-size:14px;color:var(--text-light);font-weight:600;white-space:nowrap;transition:all .2s}
.category-tab-list li a:hover{color:var(--primary);background:var(--primary-light)}
.category-tab-list li.active a{color:var(--primary);background:var(--primary-light);border-bottom:2px solid var(--primary)}

/* Search Page */
.search-header{margin-bottom:20px}
.search-header h1{font-size:22px;font-weight:700;margin-bottom:12px}
.search-form-large{display:flex}
.search-input-lg{border:2px solid var(--primary);border-radius:var(--radius) 0 0 var(--radius);padding:10px 18px;font-size:15px;flex:1;outline:none}
.search-btn-lg{background:var(--primary);color:#fff;border:none;padding:10px 24px;border-radius:0 var(--radius) var(--radius) 0;cursor:pointer;font-size:15px}
.search-result-info{padding:12px;background:var(--primary-light);border-radius:var(--radius);margin-bottom:16px;font-size:14px}

/* Footer */
.site-footer{background:var(--text);color:#9ca3af;padding:24px 0;margin-top:40px;font-size:13px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-links{display:flex;gap:16px}
.footer-links a{color:#9ca3af}
.footer-links a:hover{color:#fff}

/* Empty State */
.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted);font-size:15px}

/* Grid Layout (4 columns) */
.article-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.grid-item{background:var(--bg-white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:box-shadow .2s,transform .2s}
.grid-item:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.grid-item-link{display:block;text-decoration:none;color:var(--text)}
.grid-thumb{width:100%;height:180px;overflow:hidden;background:var(--border)}
.grid-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.grid-item:hover .grid-thumb img{transform:scale(1.05)}
.grid-thumb-placeholder{display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:13px}
.grid-info{padding:14px}
.grid-info h3{font-size:15px;font-weight:600;margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.grid-summary{font-size:13px;color:var(--text-light);margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.grid-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--text-muted)}

@media (max-width:1024px){.article-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:768px){.article-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:480px){.article-grid{grid-template-columns:1fr}}

/* Responsive */
@media (max-width:768px){
    .content-layout{grid-template-columns:1fr}
    .hero-slider{flex-direction:column}
    .hero-main .hero-img img{height:180px}
    .hero-side{padding:8px 16px}
    .article-item-inner{flex-direction:column}
    .article-thumb{width:100%;height:180px}
    .search-input{width:140px}
    .article-detail-title{font-size:20px}
    .footer-inner{flex-direction:column;text-align:center}
}