:root{
--c-bg:#fff;--c-bg2:#f5f7fa;--c-text:#2d3748;--c-text2:#718096;--c-accent:#3182ce;--c-accent2:#2b6cb0;--c-border:#e2e8f0;--c-card:#fff;--c-hero:linear-gradient(135deg,#667eea,#764ba2);--radius:8px;--shadow:0 1px 3px rgba(0,0,0,.06);--max-w:1100px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans SC","Microsoft YaHei",sans-serif
}
[data-theme=dark]{--c-bg:#1a202c;--c-bg2:#2d3748;--c-text:#e2e8f0;--c-text2:#a0aec0;--c-card:#2d3748;--c-border:#4a5568;--c-hero:linear-gradient(135deg,#2d3748,#1a202c)}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--c-bg);color:var(--c-text);line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:var(--c-accent);text-decoration:none}a:hover{color:var(--c-accent2)}
img{max-width:100%;height:auto;border-radius:var(--radius)}

.reading-progress{position:fixed;top:0;left:0;height:3px;background:var(--c-accent);width:var(--progress);z-index:1000}

.header{background:rgba(255,255,255,.85);border-bottom:1px solid var(--c-border);position:sticky;top:0;z-index:100;backdrop-filter:blur(10px)}
[data-theme=dark] .header{background:rgba(26,32,44,.85)}
.header-inner{max-width:var(--max-w);margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 20px;height:56px;gap:12px}
.logo{font-size:22px;font-weight:800;color:var(--c-text);letter-spacing:-.5px;white-space:nowrap}
.logo:hover{color:var(--c-accent)}
.main-nav{display:flex;gap:2px;overflow-x:auto;flex:1;justify-content:center}
.nav-item{font-size:14px;padding:5px 12px;border-radius:6px;color:var(--c-text2);white-space:nowrap;transition:all .15s;font-weight:500}
.nav-item:hover{background:var(--c-bg2);color:var(--c-accent)}
.header-actions{display:flex;align-items:center;gap:6px;flex-shrink:0}
.lang-link{font-size:12px;padding:3px 8px;border-radius:4px;color:var(--c-text2);border:1px solid var(--c-border);white-space:nowrap}
.lang-link:hover{color:var(--c-accent);border-color:var(--c-accent)}
.lang-link.active{background:var(--c-accent);color:#fff;border-color:var(--c-accent)}
.theme-toggle{background:none;border:1px solid var(--c-border);border-radius:4px;padding:3px 8px;cursor:pointer;font-size:14px;color:var(--c-text2)}

.main{max-width:var(--max-w);margin:0 auto;padding:0 20px 60px}

.hero{text-align:center;padding:64px 20px 48px;background:var(--c-hero);color:#fff;margin:0 -20px 36px;border-radius:0 0 20px 20px}
.hero h1{font-size:38px;font-weight:800;margin-bottom:10px;letter-spacing:-1px}
.hero-desc{font-size:17px;opacity:.9;max-width:520px;margin:0 auto;line-height:1.6}

.post-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin-bottom:40px}
.post-card{background:var(--c-card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:transform .2s,box-shadow .2s;border:1px solid var(--c-border)}
.post-card:hover{transform:translateY(-3px);box-shadow:0 8px 25px rgba(0,0,0,.1)}
.post-card-img{height:180px;overflow:hidden;background:var(--c-bg2)}
.post-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.post-card:hover .post-card-img img{transform:scale(1.05)}
.post-card-body{padding:16px 18px}
.post-card-title{font-size:16px;font-weight:600;line-height:1.5;margin-bottom:8px;color:var(--c-text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card-meta{font-size:12px;color:var(--c-text2);display:flex;gap:8px;align-items:center}
.post-card-cat{background:var(--c-accent);color:#fff;padding:1px 7px;border-radius:3px;font-size:11px;font-weight:500}
.post-card-icon{height:180px;display:flex;align-items:center;justify-content:center;font-size:48px;background:var(--c-bg2)}

.article{max-width:720px;margin:0 auto;padding:32px 0}
.article-header{text-align:center;margin-bottom:32px}
.article-cat-top{display:inline-block;color:var(--c-accent);font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:1px;margin-bottom:12px}
.article-title{font-size:32px;font-weight:800;line-height:1.3;margin-bottom:16px;letter-spacing:-.5px}
.article-meta{font-size:14px;color:var(--c-text2);display:flex;gap:12px;justify-content:center}
.article-cover{margin-bottom:32px;border-radius:var(--radius);overflow:hidden}
.article-cover img{width:100%;max-height:400px;object-fit:cover}
.article-content{font-size:17px;line-height:1.9}
.article-content h2{font-size:24px;font-weight:700;margin:36px 0 16px;padding-bottom:8px;border-bottom:1px solid var(--c-border)}
.article-content h3{font-size:19px;font-weight:600;margin:28px 0 10px}
.article-content p{margin-bottom:18px}
.article-content strong{color:var(--c-accent)}
.article-content ol,.article-content ul{margin:0 0 18px 24px}
.article-content li{margin-bottom:8px}
.article-content blockquote{border-left:4px solid var(--c-accent);margin:24px 0;padding:12px 20px;background:var(--c-bg2);border-radius:0 8px 8px 0;color:var(--c-text2)}
.article-content .tip{background:#ebf8ff;border-left:4px solid var(--c-accent);padding:12px 18px;margin:18px 0;border-radius:0 8px 8px 0;font-size:15px}
.article-content .warn{background:#fffaf0;border-left:4px solid #ed8936;padding:12px 18px;margin:18px 0;border-radius:0 8px 8px 0;font-size:15px}
.article-content hr{border:none;border-top:1px solid var(--c-border);margin:28px 0}
.article-tags{display:flex;gap:8px;flex-wrap:wrap;margin:36px 0 24px}
.tag-pill{background:var(--c-bg2);color:var(--c-text2);padding:4px 12px;border-radius:14px;font-size:13px}
.tag-pill:hover{background:var(--c-accent);color:#fff}
.article-author-card{display:flex;align-items:center;gap:16px;background:var(--c-bg2);padding:18px;border-radius:var(--radius);margin-bottom:28px}
.author-avatar{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--c-accent);border-radius:50%;color:#fff;font-size:24px;flex-shrink:0}
.author-info strong{display:block;margin-bottom:4px;font-size:15px}
.author-info p{font-size:13px;color:var(--c-text2);margin:0}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin:32px 0}
.article-nav a{font-size:14px;color:var(--c-accent);max-width:45%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.article-share{display:flex;align-items:center;gap:8px;padding:16px 0;border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);margin-bottom:24px;font-size:13px;color:var(--c-text2)}
.share-btn{padding:4px 14px;border-radius:14px;font-size:12px;color:#fff}
.share-btn.twitter{background:#1da1f2}.share-btn.facebook{background:#1877f2}.share-btn.weibo{background:#e6162d}
.related-posts{margin-top:32px}.related-posts h3{font-size:20px;margin-bottom:16px}
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.related-card{background:var(--c-bg2);padding:14px;border-radius:var(--radius);border:1px solid var(--c-border)}
.related-card:hover{border-color:var(--c-accent)}
.related-title{font-size:14px;font-weight:500;display:block;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-meta{font-size:12px;color:var(--c-text2)}
.article-toc{background:var(--c-bg2);border-radius:var(--radius);padding:18px 22px;margin-bottom:32px;border:1px solid var(--c-border)}
.toc-title{font-size:15px;font-weight:700;margin-bottom:12px}
.article-toc nav ul{list-style:none;padding:0}.article-toc nav li{margin-bottom:6px;font-size:14px}
.article-toc nav a{color:var(--c-text2)}.article-toc nav a:hover{color:var(--c-accent)}
.article-toc nav ul ul{padding-left:16px;margin-top:4px}

.list-header{padding:40px 0 20px;text-align:center}.list-header h1{font-size:28px;font-weight:800}
.pagination{display:flex;justify-content:center;gap:6px;margin-top:32px;list-style:none}
.pagination .page-item a,.pagination .page-item span{display:block;padding:6px 14px;border-radius:var(--radius);background:var(--c-card);font-size:14px;border:1px solid var(--c-border)}
.pagination .active span{background:var(--c-accent);color:#fff;border-color:var(--c-accent)}
.pagination .disabled span{color:var(--c-text2);opacity:.5}
.footer{text-align:center;padding:28px;color:var(--c-text2);font-size:13px;border-top:1px solid var(--c-border);margin-top:40px}

@media(max-width:768px){
.main-nav{display:none}
.hero h1{font-size:26px}.post-grid{grid-template-columns:1fr}
.article-title{font-size:24px}.article{padding:24px 0}
.related-grid{grid-template-columns:1fr}
}.article-page{max-width:var(--max-w);margin:0 auto;padding:32px 0}
.article-header{text-align:center;margin-bottom:32px}
.article-cover{margin-bottom:32px;border-radius:var(--radius);overflow:hidden}
.article-cover img{width:100%;max-height:400px;object-fit:cover}
.article-body-wrap{display:flex;gap:40px;align-items:flex-start}
.article-sidebar{width:220px;flex-shrink:0}
.toc-sticky{position:sticky;top:72px;background:var(--c-bg2);border-radius:var(--radius);padding:18px;border:1px solid var(--c-border);font-size:14px;line-height:1.6;max-height:calc(100vh - 100px);overflow-y:auto}
.toc-title{font-size:15px;font-weight:700;margin-bottom:12px;color:var(--c-text)}
.toc-sticky nav ul{list-style:none;padding:0}
.toc-sticky nav li{margin-bottom:6px}
.toc-sticky nav a{color:var(--c-text2);display:block;padding:2px 0;border-left:2px solid transparent;padding-left:8px;transition:all .15s}
.toc-sticky nav a:hover{color:var(--c-accent);border-left-color:var(--c-accent)}
.toc-sticky nav ul ul{padding-left:12px;margin-top:2px}
.toc-sticky nav ul ul a{font-size:13px}
.article-content{flex:1;min-width:0;font-size:17px;line-height:1.9}
.article-content h2{font-size:24px;font-weight:700;margin:36px 0 16px;padding-bottom:8px;border-bottom:1px solid var(--c-border)}
.article-content h3{font-size:19px;font-weight:600;margin:28px 0 10px}
.article-content p{margin-bottom:18px}
.article-content strong{color:var(--c-accent)}
.article-content ol,.article-content ul{margin:0 0 18px 24px}
.article-content li{margin-bottom:8px}
.article-content blockquote{border-left:4px solid var(--c-accent);margin:24px 0;padding:12px 20px;background:var(--c-bg2);border-radius:0 8px 8px 0;color:var(--c-text2)}
.article-content .tip{background:#ebf8ff;border-left:4px solid var(--c-accent);padding:12px 18px;margin:18px 0;border-radius:0 8px 8px 0;font-size:15px}
.article-content .warn{background:#fffaf0;border-left:4px solid #ed8936;padding:12px 18px;margin:18px 0;border-radius:0 8px 8px 0;font-size:15px}
.article-content hr{border:none;border-top:1px solid var(--c-border);margin:28px 0}

@media(max-width:860px){
.article-body-wrap{flex-direction:column}
.article-sidebar{width:100%}
.toc-sticky{position:static;max-height:none;margin-bottom:24px}
}.lang-select{font-size:12px;padding:3px 6px;border-radius:4px;border:1px solid var(--c-border);background:var(--c-bg);color:var(--c-text);cursor:pointer;outline:none}
.lang-select:focus{border-color:var(--c-accent)}
.theme-toggle{background:none;border:1px solid var(--c-border);border-radius:4px;padding:3px 7px;cursor:pointer;font-size:15px;color:var(--c-text2);line-height:1}
.header-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}

@media(max-width:768px){.main-nav{display:none}.hero h1{font-size:26px}}