:root{--bg: #ffffff;--bg-subtle: #f9fafb;--bg-hover: #f3f4f6;--border: #e5e7eb;--border-strong: #d1d5db;--text: #111827;--text-secondary: #4b5563;--text-muted: #9ca3af;--accent: #111827;--tag-bg: #f3f4f6;--tag-color: #374151;--shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 8px 30px rgba(0,0,0,.08);--shadow-lg: 0 16px 48px rgba(0,0,0,.12);--radius: 14px;--radius-sm: 8px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,sans-serif;background:var(--bg-subtle);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}nav{background:#ffffffd9;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.nav-inner{max-width:900px;margin:0 auto;padding:0 28px;height:60px;display:flex;align-items:center;justify-content:space-between}.nav-logo{font-size:17px;font-weight:700;color:var(--text);letter-spacing:-.3px}.nav-links{display:flex;gap:4px;align-items:center}.nav-links a,.nav-links button{font-size:14px;color:var(--text-secondary);background:none;border:none;cursor:pointer;padding:6px 12px;border-radius:var(--radius-sm);transition:background .15s,color .15s;font-family:inherit;font-weight:500}.nav-links a:hover,.nav-links button:hover{background:var(--bg-hover);color:var(--text)}.btn-primary{background:var(--text)!important;color:#fff!important;padding:6px 16px!important}.btn-primary:hover{background:#374151!important}.container{max-width:900px;margin:0 auto;padding:48px 28px}.home-hero{padding:56px 0 48px;border-bottom:1px solid var(--border);margin-bottom:48px}.hero-title{font-size:42px;font-weight:800;letter-spacing:-1.5px;line-height:1.15;color:var(--text);margin-bottom:12px}.hero-sub{font-size:17px;color:var(--text-secondary);font-weight:400}.section-label{font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);margin-bottom:20px}.post-list{display:flex;flex-direction:column;gap:16px}.post-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:28px 32px;cursor:pointer;transition:box-shadow .2s,transform .2s,border-color .2s}.post-card:hover{box-shadow:var(--shadow-md);border-color:transparent;transform:translateY(-2px)}.post-card h2{font-size:19px;font-weight:700;margin-bottom:8px;color:var(--text);letter-spacing:-.3px;line-height:1.4}.post-card .summary{color:var(--text-secondary);font-size:15px;margin-bottom:16px;line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.post-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:13px;color:var(--text-muted)}.tag{background:var(--tag-bg);color:var(--tag-color);padding:3px 10px;border-radius:20px;font-size:12px;font-weight:500}.post-detail{max-width:740px;margin:0 auto}.post-detail h1{font-size:36px;font-weight:800;margin-bottom:20px;letter-spacing:-1px;line-height:1.25}.post-detail .post-meta{margin-bottom:40px;padding-bottom:28px;border-bottom:1px solid var(--border)}.markdown-body{line-height:1.85;font-size:16.5px;color:#1f2937}.markdown-body h1,.markdown-body h2,.markdown-body h3{margin:1.8em 0 .6em;font-weight:700;color:var(--text);letter-spacing:-.3px}.markdown-body h1{font-size:28px}.markdown-body h2{font-size:22px;border-bottom:1px solid var(--border);padding-bottom:8px}.markdown-body h3{font-size:18px}.markdown-body p{margin:1em 0}.markdown-body ul,.markdown-body ol{padding-left:1.8em;margin:1em 0}.markdown-body li{margin:.4em 0}.markdown-body code{background:#f3f4f6;padding:2px 7px;border-radius:5px;font-size:14px;font-family:Menlo,Monaco,Cascadia Code,monospace;color:#d63384}.markdown-body pre{background:#1f2937;padding:20px 24px;border-radius:var(--radius-sm);overflow-x:auto;margin:1.2em 0}.markdown-body pre code{background:none;padding:0;color:#e5e7eb;font-size:14px}.markdown-body blockquote{border-left:3px solid #d1d5db;padding:4px 20px;color:var(--text-secondary);margin:1.2em 0;font-style:italic}.markdown-body img{max-width:100%;border-radius:var(--radius-sm)}.markdown-body a{color:#2563eb;text-decoration:underline;text-underline-offset:3px}.markdown-body table{border-collapse:collapse;width:100%;margin:1.2em 0}.markdown-body th,.markdown-body td{border:1px solid var(--border);padding:10px 14px}.markdown-body th{background:var(--bg-subtle);font-weight:600}.markdown-body hr{border:none;border-top:1px solid var(--border);margin:2em 0}.login-page{min-height:calc(100vh - 60px);display:flex;align-items:center;justify-content:center;padding:40px 24px}.login-box{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:44px 40px;width:100%;max-width:400px;box-shadow:var(--shadow-sm)}.login-box h2{font-size:22px;font-weight:800;margin-bottom:28px;text-align:center;letter-spacing:-.5px}.form-group{margin-bottom:18px}.form-group label{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px;color:var(--text-secondary)}.form-group input,.form-group textarea,.form-group select{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:15px;outline:none;transition:border-color .15s,box-shadow .15s;font-family:inherit;background:var(--bg);color:var(--text)}.form-group input:focus,.form-group textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #11182714}.btn{padding:10px 20px;border-radius:var(--radius-sm);border:none;font-size:14.5px;cursor:pointer;font-weight:600;transition:background .15s,transform .1s,box-shadow .15s;font-family:inherit}.btn:active{transform:scale(.98)}.btn-dark{background:var(--text);color:#fff}.btn-dark:hover{background:#374151}.btn-danger{background:#ef4444;color:#fff}.btn-danger:hover{background:#dc2626}.btn-outline{background:var(--bg);color:var(--text);border:1px solid var(--border-strong)}.btn-outline:hover{background:var(--bg-hover)}.btn-full{width:100%}.error-msg{color:#ef4444;font-size:13.5px;margin-top:8px}.admin-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px}.admin-post-list{display:flex;flex-direction:column;gap:12px}.admin-post-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px 24px;display:flex;justify-content:space-between;align-items:center;gap:12px;transition:box-shadow .15s}.admin-post-item:hover{box-shadow:var(--shadow-sm)}.admin-post-info h3{font-size:15.5px;font-weight:600;margin-bottom:4px}.admin-post-info p{font-size:13px;color:var(--text-muted)}.admin-actions{display:flex;gap:8px;flex-shrink:0}.draft-badge{background:#fef3c7;color:#92400e;font-size:11.5px;font-weight:600;padding:2px 9px;border-radius:20px;margin-left:8px}.editor-layout{display:grid;grid-template-columns:1fr 1fr;gap:20px;height:calc(100vh - 200px);min-height:400px}.editor-panel,.preview-panel{display:flex;flex-direction:column;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}.panel-header{padding:10px 16px;font-size:12.5px;font-weight:600;color:var(--text-muted);background:var(--bg-subtle);border-bottom:1px solid var(--border);letter-spacing:.04em;text-transform:uppercase}.editor-panel textarea{flex:1;padding:20px;border:none;outline:none;resize:none;font-family:Menlo,Monaco,monospace;font-size:14px;line-height:1.75;color:var(--text)}.preview-panel .markdown-body{flex:1;overflow-y:auto;padding:20px}.editor-fields{display:flex;flex-direction:column;gap:12px;margin-bottom:16px}.editor-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.editor-actions{display:flex;gap:10px;margin-top:16px}.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--text-muted);font-size:14px;margin-bottom:32px;cursor:pointer;font-weight:500;transition:color .15s}.back-link:hover{color:var(--text)}.empty{text-align:center;padding:72px 0;color:var(--text-muted);font-size:15px}.page-title{font-size:30px;font-weight:800;margin-bottom:32px;color:var(--text);letter-spacing:-.8px}.comments-section{max-width:740px;margin:56px auto 0;padding-top:40px;border-top:1px solid var(--border)}.comments-title{font-size:17px;font-weight:700;margin-bottom:24px;color:var(--text)}.comment-list{display:flex;flex-direction:column;gap:14px;margin-bottom:32px}.comment-item{background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 20px;transition:border-color .15s}.comment-item:hover{border-color:var(--border-strong)}.comment-header{display:flex;align-items:center;gap:10px;margin-bottom:8px}.comment-username{font-weight:700;font-size:14px}.comment-time{font-size:12px;color:var(--text-muted)}.comment-delete{margin-left:auto;font-size:12px;color:#ef4444;background:none;border:none;cursor:pointer;font-family:inherit}.comment-delete:hover{text-decoration:underline}.comment-content{font-size:15px;color:var(--text-secondary);line-height:1.65;white-space:pre-wrap}.comment-textarea{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:15px;outline:none;resize:vertical;font-family:inherit;transition:border-color .15s,box-shadow .15s;background:var(--bg)}.comment-textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #11182714}.comment-login-tip{text-align:center;padding:28px;background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius-sm)}.comment-login-tip p{margin-bottom:14px;color:var(--text-secondary);font-size:15px}@media (max-width: 640px){.container{padding:32px 20px}.hero-title{font-size:30px}.editor-layout,.editor-row{grid-template-columns:1fr}.admin-post-item{flex-direction:column;align-items:flex-start}.post-card{padding:22px 20px}.login-box{padding:32px 24px}}