:root{--primary: #2563eb;--primary-dark: #1d4ed8;--text: #1f2937;--text-light: #4b5563;--muted: #6b7280;--border: #e5e7eb;--bg-soft: #f9fafb;--bg-code: #1e293b;--sidebar-w: 248px;--toc-w: 200px;--header-h: 60px;--radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .06)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px)}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:var(--text);font-size:16px;line-height:1.8;background:#fff}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.muted{color:var(--muted)}.site-header{position:sticky;top:0;z-index:50;height:var(--header-h);display:flex;align-items:center;gap:16px;padding:0 24px;background:#fff;border-bottom:1px solid var(--border)}.site-header .logo{font-weight:700;font-size:17px;color:var(--text);display:flex;align-items:center;gap:8px;white-space:nowrap}.site-header .logo:hover{text-decoration:none}.site-header .logo .dot{color:var(--primary)}.site-nav{display:flex;gap:4px;margin-left:auto;align-items:center}.site-nav a{color:var(--text-light);padding:6px 12px;border-radius:6px;font-size:14px;cursor:pointer}.site-nav a:hover{background:var(--bg-soft);color:var(--text);text-decoration:none}.site-nav a.active{color:var(--primary);background:#eff6ff}.site-nav .nav-user{font-size:14px;color:var(--muted);padding:0 4px}.menu-toggle{display:none;background:none;border:1px solid var(--border);border-radius:6px;font-size:18px;cursor:pointer;padding:4px 10px;line-height:1}.layout{display:flex;max-width:1360px;margin:0 auto;align-items:flex-start}.sidebar{width:var(--sidebar-w);flex:0 0 var(--sidebar-w);position:sticky;top:var(--header-h);height:calc(100vh - var(--header-h));overflow-y:auto;padding:24px 12px 40px 24px;border-right:1px solid var(--border)}.sidebar .sb-title{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:8px 8px 10px;font-weight:600}.sidebar ul{list-style:none;margin:0;padding:0}.sidebar li a{display:block;padding:6px 10px;border-radius:6px;color:var(--text-light);font-size:14px;line-height:1.5;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar li a:hover{background:var(--bg-soft);color:var(--text);text-decoration:none}.sidebar li a.active{background:#eff6ff;color:var(--primary);font-weight:600}.sidebar li a .no{color:var(--muted);margin-right:6px;font-variant-numeric:tabular-nums}.content{flex:1;min-width:0;max-width:820px;padding:32px 40px 80px}.content h1{font-size:30px;line-height:1.3;margin:8px 0 12px}.content h2{font-size:22px;margin:44px 0 16px;padding-bottom:8px;border-bottom:1px solid var(--border)}.content h3{font-size:17px;margin:28px 0 10px}.content p{margin:12px 0}.content ul,.content ol{padding-left:22px}.content li{margin:6px 0}.content .lead{font-size:17px;color:var(--text-light);background:var(--bg-soft);border-left:3px solid var(--primary);padding:12px 18px;border-radius:0 6px 6px 0;margin:16px 0 24px}.video-block{margin:0 0 32px}.video-item{margin-bottom:20px}.video-block video{width:100%;border-radius:var(--radius);background:#000;box-shadow:var(--shadow);display:block}.video-block .video-empty{aspect-ratio:16 / 9;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:var(--bg-soft);border:1px dashed var(--border);border-radius:var(--radius);color:var(--muted)}.video-block .video-empty .play-icon{width:56px;height:56px;border-radius:50%;border:2px solid var(--muted);display:flex;align-items:center;justify-content:center;font-size:20px;padding-left:4px}.video-block .video-cap{font-size:13px;color:var(--muted);margin:10px 2px 0}.download-block{margin:0 0 32px;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.download-block .dl-head{display:flex;align-items:center;gap:10px;padding:14px 18px;background:var(--bg-soft);border-bottom:1px solid var(--border);font-weight:600;font-size:15px}.download-block .dl-head .ico{color:var(--primary)}.dl-list{list-style:none;margin:0;padding:0}.dl-list li{display:flex;align-items:center;gap:14px;padding:12px 18px;border-bottom:1px solid var(--border)}.dl-list li:last-child{border-bottom:none}.dl-list .dl-info{flex:1;min-width:0}.dl-list .dl-name{display:block;font-size:14px;font-weight:600;word-break:break-all}.dl-list .dl-desc{display:block;font-size:13px;color:var(--muted);line-height:1.5}.dl-list .dl-btn{flex:0 0 auto;font-size:13px;padding:6px 14px;border:1px solid var(--primary);border-radius:6px;color:var(--primary);white-space:nowrap}.dl-list .dl-btn:hover{background:var(--primary);color:#fff;text-decoration:none}.content table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}.content th,.content td{border:1px solid var(--border);padding:9px 12px;text-align:left;vertical-align:top}.content th{background:var(--bg-soft);font-weight:600}.content tbody tr:nth-child(2n){background:#fcfcfd}.callout{margin:18px 0;padding:12px 16px;border-radius:6px;font-size:15px;border-left:4px solid}.callout .callout-title{display:block;font-weight:600;margin-bottom:4px}.callout.tip{background:#eff6ff;border-color:var(--primary)}.callout.tip .callout-title{color:var(--primary-dark)}.callout.warning{background:#fffbeb;border-color:#f59e0b}.callout.warning .callout-title{color:#b45309}.callout.danger{background:#fef2f2;border-color:#ef4444}.callout.danger .callout-title{color:#b91c1c}.code-block{position:relative;margin:18px 0}.code-block pre{margin:0;background:var(--bg-code);color:#e2e8f0;padding:16px 18px;border-radius:var(--radius);overflow-x:auto;font-size:13.5px;line-height:1.7;font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace}.code-block code{white-space:pre-wrap;word-break:break-word}.code-block .copy-btn{position:absolute;top:8px;right:8px;background:#ffffff1f;color:#cbd5e1;border:none;border-radius:5px;font-size:12px;padding:4px 10px;cursor:pointer}.code-block .copy-btn:hover{background:#ffffff3d}code:not(pre code){background:var(--bg-soft);padding:2px 6px;border-radius:4px;font-size:.9em;color:#be185d}.content figure{margin:20px 0;text-align:center}.content figure img{max-width:100%;border:1px solid var(--border);border-radius:var(--radius)}.content figure.img-placeholder{border:1px dashed var(--border);border-radius:var(--radius);padding:32px 16px;color:var(--muted);background:var(--bg-soft);font-size:14px}.content figcaption{font-size:13px;color:var(--muted);margin-top:8px}.toc{width:var(--toc-w);flex:0 0 var(--toc-w);position:sticky;top:var(--header-h);height:calc(100vh - var(--header-h));overflow-y:auto;padding:32px 20px 40px 8px}.toc .toc-title{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:10px}.toc ul{list-style:none;margin:0;padding:0;border-left:2px solid var(--border)}.toc li a{display:block;font-size:13px;color:var(--muted);padding:4px 0 4px 12px;margin-left:-2px;border-left:2px solid transparent;line-height:1.5;cursor:pointer}.toc li a:hover{color:var(--text);text-decoration:none}.toc li.sub a{padding-left:22px;font-size:12.5px}.site-footer{border-top:1px solid var(--border);background:var(--bg-soft);padding:28px 24px;text-align:center;font-size:13px;color:var(--muted);line-height:2}.site-footer a{color:var(--text-light)}.site-footer .beian{margin-top:6px}.page-wrap{max-width:1000px;margin:0 auto;padding:40px 24px 80px}.page-title{font-size:28px;margin:0 0 6px}.hero{padding:40px 0 28px;border-bottom:1px solid var(--border);margin-bottom:36px}.hero h1{font-size:34px;margin:0 0 16px}.hero p{font-size:17px;color:var(--text-light);max-width:720px}.hero .hero-tags{margin-top:18px;display:flex;gap:10px;flex-wrap:wrap}.hero .hero-tags span{font-size:13px;color:var(--primary);background:#eff6ff;padding:4px 12px;border-radius:20px}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;margin-top:20px}.card{display:block;border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:box-shadow .15s,border-color .15s,transform .15s}.card:hover{border-color:var(--primary);box-shadow:0 4px 16px #2563eb1a;transform:translateY(-2px);text-decoration:none}.card .card-no{font-size:13px;color:var(--primary);font-weight:700}.card .card-title{font-size:16px;font-weight:700;color:var(--text);margin:8px 0;line-height:1.5}.card .card-desc{font-size:13.5px;color:var(--muted);line-height:1.65}.section-title{font-size:22px;margin:40px 0 6px}.section-sub{color:var(--muted);font-size:14px;margin:0 0 16px}.chapter-list{list-style:none;padding:0;margin:20px 0}.chapter-list li{border-bottom:1px solid var(--border)}.chapter-list li a{display:flex;gap:16px;align-items:center;padding:18px 4px;color:var(--text)}.chapter-list li a:hover{text-decoration:none}.chapter-list .ch-no{font-weight:700;color:var(--primary);min-width:44px}.chapter-list .ch-body{flex:1;display:flex;flex-direction:column}.chapter-list .ch-title{font-weight:600}.chapter-list .ch-desc{font-size:13.5px;color:var(--muted);line-height:1.6}.chapter-list .ch-badge{font-size:12px;color:var(--primary);background:#eff6ff;padding:2px 10px;border-radius:20px;white-space:nowrap}.auth-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eff6ff,#f9fafb);padding:24px}.auth-card{width:100%;max-width:400px;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:0 10px 40px #0f172a14;padding:32px 28px}.auth-card h1{font-size:24px;margin:0 0 6px}.auth-sub{color:var(--muted);font-size:14px;margin:0 0 22px}.auth-card label{display:block;margin-bottom:14px}.auth-card label span{display:block;font-size:13px;color:var(--text-light);margin-bottom:5px}.auth-card input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:15px;outline:none;transition:border-color .15s,box-shadow .15s}.auth-card input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1f}.auth-card button{width:100%;margin-top:8px;padding:11px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:background .15s}.auth-card button:hover{background:var(--primary-dark)}.auth-card button:disabled{opacity:.6;cursor:not-allowed}.auth-error{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;border-radius:6px;padding:8px 12px;font-size:13.5px;margin:4px 0 12px}.auth-foot{text-align:center;font-size:13.5px;color:var(--muted);margin:18px 0 0}.captcha-field{display:block;margin-bottom:14px}.captcha-field>span{display:block;font-size:13px;color:var(--text-light);margin-bottom:5px}.captcha-row{display:flex;gap:10px;align-items:stretch}.captcha-row input{flex:1;min-width:0}.captcha-img{height:44px;width:120px;flex:0 0 120px;border:1px solid var(--border);border-radius:8px;cursor:pointer;background:var(--bg-soft);object-fit:cover}.captcha-img:hover{border-color:var(--primary)}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a73;display:flex;align-items:flex-start;justify-content:center;padding:48px 20px;z-index:100;overflow-y:auto}.modal-box{background:#fff;border-radius:12px;box-shadow:0 20px 60px #0f172a40;width:100%;max-width:640px;padding:26px 26px 22px;position:relative}.modal-title{font-size:19px;margin:0 0 18px}.modal-close{position:absolute;top:14px;right:14px;width:30px;height:30px;border:none;background:var(--bg-soft);border-radius:8px;font-size:18px;line-height:1;color:var(--muted);cursor:pointer}.modal-close:hover{background:#eef1f5;color:var(--text)}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:8px}.admin-shell{display:flex;min-height:100vh;background:#f4f6fa}.admin-side{width:224px;flex:0 0 224px;background:#0f172a;color:#cbd5e1;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.admin-brand{padding:20px 20px 18px;font-size:15px;font-weight:700;color:#fff;display:flex;align-items:center;gap:8px;border-bottom:1px solid rgba(255,255,255,.08)}.admin-brand .dot{color:#38bdf8}.admin-nav{padding:12px 10px;display:flex;flex-direction:column;gap:2px;flex:1}.admin-nav-item{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:8px;color:#cbd5e1;font-size:14px;cursor:pointer}.admin-nav-item:hover{background:#ffffff12;color:#fff;text-decoration:none}.admin-nav-item.active{background:var(--primary);color:#fff;font-weight:600}.admin-nav-item .ico{width:18px;text-align:center;opacity:.9}.admin-side-foot{padding:12px 10px 18px;border-top:1px solid rgba(255,255,255,.08)}.admin-main{flex:1;min-width:0;display:flex;flex-direction:column}.admin-top{height:60px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 24px;position:sticky;top:0;z-index:20}.admin-title{font-size:17px;margin:0}.admin-user{margin-left:auto;display:flex;align-items:center;gap:14px}.admin-user .who{font-size:14px;color:var(--muted)}.admin-body{padding:24px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px 20px;box-shadow:var(--shadow);border-left:4px solid var(--primary)}.stat-card .stat-num{font-size:26px;font-weight:700;line-height:1.2}.stat-card .stat-label{font-size:13px;color:var(--muted);margin-top:4px}.stat-card.tone-blue{border-left-color:#2563eb}.stat-card.tone-green{border-left-color:#16a34a}.stat-card.tone-violet{border-left-color:#7c3aed}.stat-card.tone-amber{border-left-color:#d97706}.stat-card.tone-slate{border-left-color:#64748b}.panel{background:#fff;border:1px solid var(--border);border-radius:12px;padding:22px;margin-bottom:22px;box-shadow:var(--shadow)}.panel-title{font-size:16px;margin:0 0 16px}.panel-head{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}.panel-head .spacer{flex:1}.admin-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden;font-size:14px}.admin-table th,.admin-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);vertical-align:middle}.admin-table thead th{background:var(--bg-soft);font-weight:600;color:var(--text-light)}.admin-table tbody tr:last-child td{border-bottom:none}.admin-table tbody tr:hover{background:#fbfcfe}.admin-table .cell-strong{font-weight:600;color:var(--text)}.admin-table .cell-sub{font-size:12.5px;margin-top:2px}.admin-table .row-actions{white-space:nowrap}.admin-table .mono{font-family:SFMono-Regular,Consolas,Menlo,monospace;font-size:13px}.badge{display:inline-block;font-size:12px;padding:2px 10px;border-radius:20px;font-weight:600}.badge-on{background:#dcfce7;color:#15803d}.badge-off{background:#f1f5f9;color:#64748b}.admin-form label{display:block;margin-bottom:14px}.admin-form label>span{display:block;font-size:13px;color:var(--text-light);margin-bottom:5px}.admin-form input,.admin-form select,.admin-form textarea{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;outline:none;background:#fff}.admin-form input:focus,.admin-form select:focus,.admin-form textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1f}.admin-form textarea.mono{font-family:SFMono-Regular,Consolas,Menlo,monospace;font-size:13px}.admin-form .form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.admin-form label.checkbox{display:flex;align-items:center;gap:8px}.admin-form label.checkbox input{width:auto}.admin-form label.checkbox span{margin:0}.admin-error{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:8px 12px;font-size:13.5px;margin:4px 0 12px}.admin-notice{color:#15803d;background:#dcfce7;border-radius:20px;padding:4px 14px;font-size:13px}.filter-select{padding:7px 12px;border:1px solid var(--border);border-radius:8px;font-size:13.5px;background:#fff}.progress{height:8px;background:var(--bg-soft);border-radius:6px;overflow:hidden;margin:4px 0 12px}.progress-bar{height:100%;background:var(--primary);transition:width .2s}.btn-primary,.btn-ghost,.btn-sm{font-family:inherit;cursor:pointer;border-radius:8px;font-size:14px;transition:background .15s,border-color .15s}.btn-primary{background:var(--primary);color:#fff;border:none;padding:9px 18px;font-weight:600}.btn-primary:hover{background:var(--primary-dark)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-ghost{background:#fff;color:var(--text-light);border:1px solid var(--border);padding:8px 16px}.btn-ghost:hover{background:var(--bg-soft);color:var(--text)}.btn-sm{background:#fff;border:1px solid var(--border);color:var(--text-light);padding:5px 12px;font-size:13px;margin-right:6px}.btn-sm:hover{border-color:var(--primary);color:var(--primary)}.btn-sm.btn-danger:hover{border-color:#ef4444;color:#dc2626}@media (max-width: 1080px){.toc{display:none}.content{max-width:none}}@media (max-width: 768px){.menu-toggle{display:block;margin-left:auto}.site-nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;flex-direction:column;align-items:stretch;background:#fff;border-bottom:1px solid var(--border);padding:8px;margin:0}.site-nav.open{display:flex}.sidebar{display:none}.content{padding:24px 20px 60px}.content h1{font-size:25px}.hero h1{font-size:26px}}
