/* static/css/main.css - 从 index.html 完整复制 <style> 内容 */
:root {
    --bg: #f9f7f3;
    --surface: #fffefb;
    --text: #2d2d2d;
    --text-secondary: #5a5a5a;
    --text-muted: #8c8c8c;
    --accent: #3d5060;
    --accent-hover: #2d3d4a;
    --accent-soft: #eef1f3;
    --accent-light: #dde2e6;
    --warm-gold: #b8956a;
    --border: #e6e3dd;
    --border-light: #f0ede8;
    --danger: #c85c5c;
    --success: #5a9e7c;
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 18px;
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.03);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
    --transition: 0.22s;
    --font: 'Microsoft YaHei','PingFang SC',system-ui,sans-serif;
}
[data-theme="dark"] {
    --bg: #1a1c1e;
    --surface: #212426;
    --text: #d8dde0;
    --text-secondary: #a0a8ac;
    --text-muted: #6a7074;
    --accent: #7a93a8;
    --accent-hover: #8ba4b8;
    --accent-soft: #1e2225;
    --accent-light: #2a3034;
    --warm-gold: #b8956a;
    --border: #2e3235;
    --border-light: #262a2d;
    --danger: #c86a6a;
    --success: #6a9e7c;
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;display:flex;flex-direction:column;overflow-x:hidden;transition:background-color 0.3s,color 0.3s}
.top-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.top-inner{max-width:1240px;margin:0 auto;padding:0 24px;display:flex;align-items:center;height:56px;gap:16px;position:relative}
.site-logo-link{display:flex;align-items:center;gap:10px;cursor:pointer;font-weight:700;font-size:1rem;text-decoration:none;color:var(--accent);flex-shrink:0}
.site-logo-img{width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem;background:var(--accent);overflow:hidden;flex-shrink:0}
.site-logo-img img{width:100%;height:100%;object-fit:cover}
.top-nav{display:flex;gap:2px;justify-content:center;flex:1;flex-wrap:wrap}
.top-nav a{padding:7px 16px;border-radius:8px;text-decoration:none;color:var(--text-secondary);font-size:.88rem;cursor:pointer;font-weight:500;white-space:nowrap;transition:var(--transition)}
.top-nav a:hover{color:var(--accent);background:var(--accent-soft)}
.top-nav a.active{color:var(--accent);background:var(--accent-soft);font-weight:600}
.header-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}
.search-box{display:flex;align-items:center;background:var(--bg);border-radius:10px;border:1px solid var(--border);height:36px;transition:var(--transition)}
.search-box:focus-within{border-color:var(--accent)}
.search-box input{border:none;background:0 0;padding:0 14px;outline:none;color:var(--text);width:120px;font-size:.84rem;font-family:var(--font)}
.search-box button{background:0 0;border:none;cursor:pointer;padding:0 10px;color:var(--text-muted)}
.search-box button svg{width:16px;height:16px}
.icon-btn{width:36px;height:36px;border-radius:10px;border:1px solid var(--border);background:var(--surface);cursor:pointer;display:flex;align-items:center;justify-content:center;padding:6px;flex-shrink:0;transition:var(--transition)}
.icon-btn:hover{border-color:var(--accent)}
.icon-btn svg{width:18px;height:18px;stroke:var(--text-secondary);fill:none;stroke-width:2;stroke-linecap:round}
[data-theme="dark"] .sun-icon{display:none}[data-theme="light"] .moon-icon{display:none}
.hamburger-btn{display:none;width:36px;height:36px;border-radius:10px;border:1px solid var(--border);background:var(--surface);cursor:pointer;align-items:center;justify-content:center;padding:8px;flex-shrink:0}
.hamburger-btn span{display:block;width:18px;height:2px;background:var(--text-secondary);border-radius:1px;transition:var(--transition);position:relative}
.hamburger-btn span::before,.hamburger-btn span::after{content:'';position:absolute;width:18px;height:2px;background:var(--text-secondary);border-radius:1px;transition:var(--transition)}
.hamburger-btn span::before{top:-6px}.hamburger-btn span::after{top:6px}
.hamburger-btn.open span{background:transparent}.hamburger-btn.open span::before{top:0;transform:rotate(45deg)}.hamburger-btn.open span::after{top:0;transform:rotate(-45deg)}
.mobile-nav-overlay{display:none;position:fixed;top:56px;left:0;right:0;bottom:0;background:var(--surface);z-index:99;padding:16px;overflow-y:auto;flex-direction:column;gap:4px}
.mobile-nav-overlay.show{display:flex}.mobile-nav-overlay a{display:block;padding:14px 16px;border-radius:10px;text-decoration:none;color:var(--text-secondary);font-size:1rem;cursor:pointer;font-weight:500;border:1px solid var(--border-light)}
.cat-section{max-width:1240px;margin:0 auto;padding:16px 24px 0}
.cat-bar{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:4px}
.cat-tag{padding:8px 18px;border-radius:10px;cursor:pointer;font-size:.85rem;border:1px solid var(--border);background:var(--surface);color:var(--text-secondary);white-space:nowrap;font-weight:500;transition:var(--transition)}
.cat-tag:hover{border-color:var(--accent);color:var(--accent)}
.cat-tag.active{background:var(--accent);color:#fff;border-color:var(--accent);font-weight:600;box-shadow:0 2px 8px rgba(61,80,96,0.2)}
.subcat-bar{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:8px;padding:8px 16px;background:var(--accent-soft);border-radius:12px;max-width:fit-content;margin-left:auto;margin-right:auto}
.subcat-label{font-size:.72rem;color:var(--accent);font-weight:600;display:flex;align-items:center;padding:4px 8px;white-space:nowrap}
.subcat-tag{padding:5px 14px;border-radius:8px;cursor:pointer;font-size:.78rem;border:1px solid var(--accent-light);background:var(--surface);color:var(--text-muted);transition:var(--transition);white-space:nowrap}
.subcat-tag:hover,.subcat-tag.active{background:var(--accent);color:#fff;border-color:var(--accent);font-weight:600}
.ad-slot:empty{display:none}
.container{max-width:1240px;margin:0 auto;padding:18px 24px;flex:1;overflow-x:hidden}
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:var(--surface);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);cursor:pointer;transition:var(--transition);box-shadow:var(--shadow-xs);display:flex;flex-direction:column;height:auto;min-height:280px}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--accent-light)}
.card-img{height:140px;min-height:140px;max-height:140px;width:100%;background:linear-gradient(135deg,var(--accent-soft),var(--accent-light));overflow:hidden;position:relative;flex-shrink:0}
.card-img img{width:100%;height:100%;object-fit:cover;position:absolute;top:0;left:0;transition:0.5s}
.card:hover .card-img img{transform:scale(1.06)}
.card-img .placeholder{color:var(--text-muted);font-size:.85rem;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}
.card-body{padding:12px 14px 14px;flex:1;display:flex;flex-direction:column}
.card-cat{font-size:.68rem;padding:3px 8px;border-radius:6px;background:var(--accent-soft);color:var(--accent);display:inline-block;margin-bottom:6px;font-weight:600}
.card-title{font-weight:700;font-size:.9rem;margin-bottom:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:var(--text)}
.card-desc{font-size:.75rem;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1;line-height:1.4;max-height:2.1rem}
.card-date{font-size:.68rem;color:var(--text-muted);margin-top:auto;padding-top:6px}
.back-btn{display:inline-flex;align-items:center;gap:6px;margin-bottom:14px;color:var(--accent);cursor:pointer;font-weight:600;font-size:.9rem}
.article-layout{display:flex;gap:24px}.article-main{flex:1;min-width:0;background:var(--surface);border-radius:var(--radius-lg);padding:24px 28px;border:1px solid var(--border);overflow-wrap:break-word;word-break:break-word}
.article-meta{color:var(--text-muted);font-size:.88rem;margin-bottom:16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.article-sidebar{width:280px;flex-shrink:0}.sidebar-card{background:var(--surface);border-radius:var(--radius-lg);padding:18px;border:1px solid var(--border);position:sticky;top:76px}
.resource-header{font-weight:700;font-size:.92rem;color:var(--accent);margin-bottom:10px;padding-bottom:8px;border-bottom:2px solid var(--accent)}
.resource-item{margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid var(--border-light)}.resource-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.resource-item img{width:100%;border-radius:10px;margin-bottom:8px;max-height:140px;object-fit:cover}
.res-title{font-weight:700;font-size:.88rem}.res-desc{font-size:.75rem;color:var(--text-muted);margin-bottom:6px}
.res-btn{display:block;width:100%;padding:13px 10px;margin:6px 0;border-radius:10px;font-size:.9rem;font-weight:700;cursor:pointer;text-align:center;border:none;transition:var(--transition);font-family:var(--font)}
.res-btn.free{background:var(--accent);color:#fff}.res-btn.free:hover{background:var(--accent-hover);transform:translateY(-1px)}
.res-btn.password{background:var(--accent-soft);color:var(--accent);border:2px solid var(--accent-light)}
.res-btn.pay{background:var(--warm-gold);color:#fff}.res-btn.pay:hover{opacity:0.9;transform:translateY(-1px)}
.res-btn.both{background:var(--accent);color:#fff}
.disclaimer-box{margin-top:28px;padding:18px 20px;background:var(--accent-soft);border-radius:var(--radius);border:1px solid var(--accent-light);font-size:.8rem;color:var(--text-secondary);line-height:1.8}
.toc-title{font-weight:700;margin:14px 0 8px;font-size:.8rem;color:var(--accent);text-transform:uppercase}
.toc-list{list-style:none}.toc-list a{color:var(--text-muted);text-decoration:none;font-size:.78rem;display:block;padding:4px 8px;border-radius:6px;transition:var(--transition)}
.toc-list a:hover{color:var(--accent);background:var(--accent-soft)}
.article-content{line-height:1.9;overflow-wrap:break-word;word-break:break-word}
.article-content img{max-width:100%;height:auto;border-radius:var(--radius)}
.article-content pre{background:#1a1b26;color:#c0caf5;padding:16px;border-radius:var(--radius);overflow-x:auto;max-width:100%}
.article-content blockquote{border-left:4px solid var(--warm-gold);padding:8px 14px;background:var(--accent-soft);margin:12px 0}
.related-box{margin-top:28px;padding:20px;background:var(--surface);border-radius:var(--radius-lg);border:1px solid var(--border)}
.related-box h3{font-size:1rem;margin-bottom:12px;color:var(--accent)}.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.related-item{cursor:pointer;text-align:center;transition:var(--transition)}.related-item:hover{transform:translateY(-2px)}
.related-item img{width:100%;height:80px;object-fit:cover;border-radius:8px;margin-bottom:6px;background:linear-gradient(135deg,var(--accent-soft),var(--accent-light))}
.related-item span{font-size:.78rem;color:var(--text-secondary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.prev-next{display:flex;justify-content:space-between;gap:16px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border-light)}
.prev-next a{padding:10px 16px;background:var(--accent-soft);border-radius:10px;cursor:pointer;color:var(--accent);font-weight:500;font-size:.85rem;text-decoration:none;flex:1;text-align:center;transition:var(--transition)}
.prev-next a:hover{background:var(--accent);color:#fff}
.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;border-radius:50%;background:var(--accent);color:#fff;border:none;cursor:pointer;display:none;z-index:99;font-size:1.2rem;box-shadow:0 4px 14px rgba(61,80,96,0.3);transition:var(--transition)}
.back-to-top.show{display:flex;align-items:center;justify-content:center}.back-to-top:hover{background:var(--accent-hover);transform:translateY(-2px)}
.hidden{display:none!important}
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);background:var(--surface);color:var(--text);padding:12px 24px;border-radius:28px;z-index:2000;opacity:0;transition:.3s;box-shadow:var(--shadow-md);pointer-events:none;max-width:90vw;border:1px solid var(--accent-light)}.toast.show{opacity:1}
@keyframes shake{0%,100%{transform:translateX(0)}20%,60%{transform:translateX(-8px)}40%,80%{transform:translateX(8px)}}
.shake{animation:shake 0.4s ease-in-out}.pwd-success{color:var(--success)!important;font-weight:700}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.5);backdrop-filter:blur(5px);z-index:1000;display:flex;align-items:center;justify-content:center}.modal-overlay.hidden{display:none}
.modal-box{background:var(--surface);border-radius:18px;padding:24px;width:420px;max-width:93vw;box-shadow:0 20px 50px rgba(0,0,0,0.2);border:1px solid var(--border)}
.modal-close{position:absolute;top:10px;right:14px;background:0 0;border:none;font-size:1.1rem;cursor:pointer;color:var(--text-muted)}
.modal-box h3{margin-bottom:12px;text-align:center;font-size:1.1rem;color:var(--accent)}
.modal-box input{width:100%;padding:10px;border:1px solid var(--border);border-radius:8px;margin:6px 0;font-size:.88rem;background:var(--bg);color:var(--text);font-family:var(--font)}
.modal-box input:focus{outline:none;border-color:var(--accent)}
.modal-box .btn{width:100%;margin-top:6px;padding:10px;border-radius:8px;font-weight:600;cursor:pointer;border:none;font-family:var(--font)}
.search-modal-box{width:560px;max-width:95vw;max-height:60vh;display:flex;flex-direction:column}
.search-input-row{display:flex;gap:8px;margin-bottom:10px}.search-input-row input{flex:1;padding:9px 14px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text)}
.search-input-row button{padding:9px 18px;background:var(--accent);color:#fff;border:none;border-radius:10px;cursor:pointer;font-weight:600}
.search-result-item{padding:12px 14px;border-bottom:1px solid var(--border-light);cursor:pointer;transition:var(--transition)}.search-result-item:hover{background:var(--accent-soft)}
.page-content{max-width:700px;margin:0 auto;padding:0 16px}
.friend-link{display:block;padding:14px 16px;border:1px solid var(--border);border-radius:12px;margin-bottom:8px;text-decoration:none;color:var(--text);transition:var(--transition)}.friend-link:hover{border-color:var(--accent);background:var(--accent-soft)}
.site-footer{margin-top:40px;padding:40px 0 30px;border-top:1px solid var(--border);background:var(--surface)}
.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-bottom:20px}
.footer-col h4{font-weight:700;margin-bottom:10px;color:var(--accent)}.footer-col p,.footer-col div{font-size:.84rem;color:var(--text-muted);line-height:1.8}.footer-col a{color:var(--accent);text-decoration:none}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid var(--border-light);font-size:.8rem;color:var(--text-muted)}
@media(max-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:14px}.card-img{height:150px;min-height:150px;max-height:150px}.related-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:768px){
    body{font-size:15px}.top-nav{display:none}.hamburger-btn{display:flex}
    .top-inner{flex-wrap:wrap;height:auto;padding:8px 12px;gap:6px;justify-content:center}
    .site-logo-link{width:100%;justify-content:center;margin-bottom:2px}
    .header-actions{width:100%;justify-content:center;gap:8px}
    .search-box input{width:100px}.mobile-nav-overlay{top:72px}
    .card-grid{grid-template-columns:repeat(2,1fr);gap:8px}
    .card{font-size:0.85rem;min-height:220px;height:auto}
    .card-img{height:100px;min-height:100px;max-height:100px}
    .card-body{padding:8px 10px}.card-cat{font-size:0.6rem;padding:2px 6px}
    .card-title{font-size:.78rem}.card-desc{font-size:.68rem;-webkit-line-clamp:1}.card-date{font-size:.62rem}
    .article-layout{flex-direction:column}.article-sidebar{width:100%}.article-main{padding:16px}
    .footer-grid{grid-template-columns:1fr;gap:16px}.related-grid{grid-template-columns:repeat(2,1fr)}
    .back-to-top{bottom:20px;right:20px;width:38px;height:38px}
    .container{padding:12px 12px}.cat-section{padding:10px 12px 0}
    .modal-box{padding:20px 16px;width:95vw}.search-modal-box{max-height:70vh}
    img,video,iframe,embed,object{max-width:100%!important;height:auto!important}
    table{display:block;width:100%!important;overflow-x:auto}
    pre{white-space:pre-wrap;word-wrap:break-word}.article-content{word-break:break-word}
    .resource-item img{max-height:100px}
}