:root {
  --bg: #fafafa;
  --bg-secondary: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --border: #e5e7eb;
  --card-bg: #ffffff;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --card-hover: 0 20px 40px rgba(0,0,0,0.08), 0 8px 16px rgba(0,0,0,0.04);
  --nav-bg: rgba(255,255,255,0.72);
  --nav-blur: 20px;
  --overlay: rgba(255,255,255,0.95);
  --tag-bg: #f3f4f6;
  --tag-text: #4b5563;
  --code-bg: #f4f4f5;
  --progress: linear-gradient(90deg, #6366f1, #a78bfa);
  --hero-grad: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --font-serif: 'Georgia', 'Noto Serif SC', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --max-w: 1200px;
  --content-w: 720px;
  --radius: 12px;
  --radius-sm: 8px;
  --tr: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
[data-theme="dark"] {
  --bg: #0f172a;
  --bg-secondary: #1e293b;
  --text: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #818cf8;
  --accent-light: #a5b4fc;
  --accent-glow: rgba(129, 140, 248, 0.2);
  --border: #334155;
  --card-bg: #1e293b;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.2);
  --card-hover: 0 20px 40px rgba(0,0,0,0.3);
  --nav-bg: rgba(15, 23, 42, 0.8);
  --overlay: rgba(15, 23, 42, 0.97);
  --tag-bg: #334155;
  --tag-text: #cbd5e1;
  --code-bg: #1e293b;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px;transition:background var(--tr),color var(--tr)}
body{font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--accent);text-decoration:none;transition:color var(--tr)}
a:hover{color:var(--accent-light)}
img{max-width:100%;height:auto;display:block}
::selection{background:var(--accent);color:#fff}

/* Reading Progress */
.reading-progress{position:fixed;top:0;left:0;width:0%;height:3px;background:var(--progress);z-index:1001;transition:width 0.1s linear;border-radius:0 2px 2px 0}

/* Navigation */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:var(--nav-bg);backdrop-filter:blur(var(--nav-blur));-webkit-backdrop-filter:blur(var(--nav-blur));border-bottom:1px solid var(--border);transition:all var(--tr)}
.nav.scrolled{box-shadow:0 1px 12px rgba(0,0,0,0.08)}
.nav-inner{max-width:var(--max-w);margin:0 auto;padding:0 2rem;height:64px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-family:var(--font-serif);font-size:1.35rem;font-weight:700}
.nav-logo span{background:var(--hero-grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-links{display:flex;align-items:center;gap:1.5rem;list-style:none}
.nav-links a{color:var(--text-secondary);font-size:0.9rem;font-weight:500;position:relative;padding:0.25rem 0;transition:color var(--tr)}
.nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--accent);transition:width var(--tr);border-radius:1px}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:0.5rem}
.nav-btn{background:none;border:none;cursor:pointer;color:var(--text-secondary);width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all var(--tr);font-size:1.1rem}
.nav-btn:hover{background:var(--accent-glow);color:var(--accent)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;color:var(--text);font-size:1.4rem;width:36px;height:36px;align-items:center;justify-content:center}

/* Command Palette */
.cmd-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:2000;display:none;align-items:flex-start;justify-content:center;padding-top:20vh}
.cmd-overlay.open{display:flex}
.cmd-box{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);width:90%;max-width:560px;box-shadow:0 25px 50px rgba(0,0,0,0.25);overflow:hidden}
.cmd-input{width:100%;padding:1rem 1.25rem;border:none;background:transparent;color:var(--text);font-size:1rem;font-family:var(--font-sans);outline:none;border-bottom:1px solid var(--border)}
.cmd-input::placeholder{color:var(--text-muted)}
.cmd-results{max-height:320px;overflow-y:auto;padding:0.5rem}
.cmd-item{display:flex;align-items:center;gap:0.75rem;padding:0.6rem 0.75rem;border-radius:var(--radius-sm);cursor:pointer;transition:background var(--tr);color:var(--text-secondary);font-size:0.9rem}
.cmd-item:hover,.cmd-item.active{background:var(--accent-glow);color:var(--text)}
.cmd-item .cmd-icon{width:20px;text-align:center;font-size:1rem;flex-shrink:0}
.cmd-item .cmd-label{flex:1}
.cmd-item .cmd-shortcut{font-size:0.75rem;color:var(--text-muted);font-family:var(--font-mono)}
.cmd-hint{padding:0.5rem 0.75rem;font-size:0.75rem;color:var(--text-muted);border-top:1px solid var(--border);display:flex;justify-content:space-between}

/* Search Overlay */
.search-overlay{position:fixed;inset:0;background:var(--overlay);z-index:1500;display:none;flex-direction:column;align-items:center;padding-top:20vh;backdrop-filter:blur(20px)}
.search-overlay.open{display:flex}
.search-box{width:90%;max-width:560px}
.search-input{width:100%;padding:1rem 1.25rem;border:2px solid var(--border);border-radius:var(--radius);background:var(--card-bg);color:var(--text);font-size:1.1rem;font-family:var(--font-sans);outline:none;transition:border-color var(--tr)}
.search-input:focus{border-color:var(--accent)}
.search-hint{text-align:center;margin-top:0.75rem;font-size:0.8rem;color:var(--text-muted)}
.search-hint kbd{background:var(--tag-bg);padding:0.15rem 0.4rem;border-radius:4px;font-family:var(--font-mono);font-size:0.75rem}
.search-results{width:90%;max-width:560px;margin-top:1rem;max-height:50vh;overflow-y:auto}
.search-result-item{display:block;padding:0.75rem 1rem;border-radius:var(--radius-sm);color:var(--text);transition:background var(--tr)}
.search-result-item:hover{background:var(--accent-glow)}
.search-result-item h4{font-size:0.95rem;margin-bottom:0.2rem}
.search-result-item p{font-size:0.8rem;color:var(--text-secondary);margin:0}

@keyframes slideDown{from{transform:translateY(-20px);opacity:0}to{transform:translateY(0);opacity:1}}
/* Hero */
.hero{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:4.5rem 1.5rem 0.5rem;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(ellipse at center,var(--accent-glow) 0%,transparent 60%);animation:heroPulse 8s ease-in-out infinite;pointer-events:none}
@keyframes heroPulse{0%,100%{transform:scale(1);opacity:0.5}50%{transform:scale(1.1);opacity:0.8}}
.hero-title{font-family:var(--font-serif);font-size:clamp(1.4rem,3.5vw,2.2rem);font-weight:800;line-height:1.2;margin-bottom:0.2rem;letter-spacing:-0.03em}position:relative;letter-spacing:-0.03em}
.hero-title .gradient-text{background:var(--hero-grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-subtitle{font-size:0.9rem;color:var(--text-secondary);max-width:540px;margin-bottom:0.1rem;position:relative;line-height:1.6}
.hero-typewriter{font-family:var(--font-mono);font-size:0.82rem;color:var(--accent);position:relative;min-height:1em}
.hero-typewriter .cursor{display:inline-block;width:2px;height:1.1em;background:var(--accent);margin-left:2px;vertical-align:text-bottom;animation:blink 1s step-end infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
.hero-stats{display:flex;gap:1.5rem;margin-top:0.3rem;position:relative}
.hero-stat{text-align:center}
.hero-stat-num{font-size:1.2rem;font-weight:700;color:var(--accent)}
.hero-stat-label{font-size:0.8rem;color:var(--text-muted)}

/* Sections */
.section{max-width:var(--max-w);margin:0 auto;padding:0 1.5rem 0.3rem}
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}
.section-title{font-family:var(--font-serif);font-size:1.5rem;font-weight:700}
.section-link{font-size:0.85rem;color:var(--accent)}

/* Category Filter */
.filter-bar{display:flex;gap:0.5rem;flex-wrap:wrap;margin-bottom:1rem;padding:0 2rem;max-width:var(--max-w);margin-left:auto;margin-right:auto}
.filter-btn{padding:0.4rem 1rem;border:1px solid var(--border);border-radius:20px;background:transparent;color:var(--text-secondary);font-size:0.85rem;cursor:pointer;transition:all var(--tr);font-family:var(--font-sans)}
.filter-btn:hover,.filter-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Post Cards */
.posts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:1rem}
.post-card{background:var(--card-bg);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);box-shadow:var(--card-shadow);transition:all 0.4s cubic-bezier(0.4,0,0.2,1);opacity:0;transform:translateY(30px);position:relative}
.post-card.visible{opacity:1;transform:translateY(0)}
.post-card:hover{box-shadow:var(--card-hover);border-color:var(--accent)}
.post-card.pinned::before{content:'置顶';position:absolute;top:1rem;right:1rem;background:var(--accent);color:#fff;font-size:0.7rem;padding:0.2rem 0.6rem;border-radius:10px;z-index:2;font-weight:600}
.post-card-cover{width:100%;height:160px;object-fit:cover;display:block}
.post-card-body{padding:1rem}
.post-card-meta{display:flex;align-items:center;gap:0.75rem;font-size:0.8rem;color:var(--text-muted);margin-bottom:0.5rem;flex-wrap:wrap}
.post-card-meta .category{color:var(--accent);font-weight:500;cursor:pointer}
.post-card-meta .category:hover{text-decoration:underline}
.post-card-title{font-family:var(--font-serif);font-size:1.15rem;font-weight:700;line-height:1.4;margin-bottom:0.5rem;color:var(--text);transition:color var(--tr)}
.post-card:hover .post-card-title{color:var(--accent)}
.post-card-summary{font-size:0.85rem;color:var(--text-secondary);line-height:1.6;margin-bottom:0.5rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-card-tags{display:flex;gap:0.4rem;flex-wrap:wrap}
.post-card-tag{font-size:0.75rem;padding:0.15rem 0.5rem;background:var(--tag-bg);color:var(--tag-text);border-radius:10px;transition:all var(--tr);cursor:pointer}
.post-card-tag:hover{background:var(--accent);color:#fff}
.post-card-footer{display:flex;align-items:center;justify-content:space-between;padding:0.75rem 1.25rem;border-top:1px solid var(--border)}
.post-card-footer .read-more{font-size:0.85rem;font-weight:500}
.post-card-actions{display:flex;gap:0.5rem}
.post-card-actions button{background:none;border:none;cursor:pointer;font-size:1rem;color:var(--text-muted);transition:all var(--tr);padding:0.25rem;border-radius:4px}
.post-card-actions button:hover{color:var(--accent)}
.post-card-actions button.liked{color:#ef4444}
.post-card-actions button.bookmarked{color:var(--accent)}

/* Post Page */
.post-page{max-width:var(--content-w);margin:0 auto;padding:5rem 2rem 3rem}
.post-header{text-align:center;margin-bottom:2.5rem}
.post-category{display:inline-block;font-size:0.8rem;color:var(--accent);font-weight:600;margin-bottom:0.5rem;background:var(--accent-glow);padding:0.2rem 0.8rem;border-radius:12px}
.post-title{font-family:var(--font-serif);font-size:clamp(1.8rem,4vw,2.5rem);font-weight:800;line-height:1.3;margin-bottom:1rem;letter-spacing:-0.02em}
.post-meta{display:flex;align-items:center;justify-content:center;gap:1rem;font-size:0.85rem;color:var(--text-muted);flex-wrap:wrap}
.post-cover{width:100%;border-radius:var(--radius);margin-bottom:2rem;max-height:420px;object-fit:cover}

/* Post Content */
.post-content{font-size:1.05rem;line-height:1.85}
.post-content h2{font-family:var(--font-serif);font-size:1.5rem;font-weight:700;margin:2.5rem 0 1rem;padding-bottom:0.5rem;border-bottom:1px solid var(--border)}
.post-content h3{font-size:1.2rem;font-weight:600;margin:2rem 0 0.75rem}
.post-content p{margin-bottom:1.2rem}
.post-content ul,.post-content ol{margin:0 0 1.2rem 1.5rem}
.post-content li{margin-bottom:0.4rem}
.post-content blockquote{border-left:3px solid var(--accent);padding:0.75rem 1.25rem;margin:1.5rem 0;background:var(--accent-glow);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-style:italic;color:var(--text-secondary)}
.post-content code{font-family:var(--font-mono);background:var(--code-bg);padding:0.15rem 0.4rem;border-radius:4px;font-size:0.9em}
.post-content pre{background:var(--code-bg);border-radius:var(--radius-sm);padding:1.25rem;margin:1.5rem 0;overflow-x:auto;position:relative}
.post-content pre code{background:none;padding:0;font-size:0.88rem}
.post-content img{border-radius:var(--radius-sm);margin:1.5rem 0;cursor:pointer;transition:transform var(--tr)}
.post-content img:hover{transform:scale(1.02)}
.post-content .post-dropcap::first-letter{float:left;font-size:3.5em;line-height:0.8;padding:0.1em 0.1em 0 0;font-weight:700;font-family:var(--font-serif);color:var(--accent)}

/* TOC */
.toc{position:fixed;top:100px;right:2rem;width:220px;max-height:calc(100vh - 140px);overflow-y:auto;font-size:0.82rem;z-index:100}
.toc-title{font-weight:600;color:var(--text-muted);margin-bottom:0.75rem;font-size:0.75rem;text-transform:uppercase;letter-spacing:0.05em}
.toc a{display:block;padding:0.3rem 0;color:var(--text-muted);border-left:2px solid transparent;padding-left:0.75rem;transition:all var(--tr);line-height:1.4}
.toc a:hover{color:var(--text)}
.toc a.active{color:var(--accent);border-left-color:var(--accent)}
.toc a.toc-h3{padding-left:1.5rem;font-size:0.78rem}
@media(max-width:1100px){.toc{display:none}}

/* Series Nav */
.series-nav{background:var(--accent-glow);border:1px solid var(--accent);border-radius:var(--radius-sm);padding:1rem 1.25rem;margin:2rem 0}
.series-nav h4{font-size:0.85rem;color:var(--accent);margin-bottom:0.5rem}
.series-nav ul{list-style:none;display:flex;flex-direction:column;gap:0.3rem}
.series-nav li{font-size:0.88rem}
.series-nav li.current{font-weight:700;color:var(--accent)}

/* Share Bar */
.share-bar{display:flex;align-items:center;gap:0.75rem;margin:2rem 0;padding:1rem 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.share-bar span{font-size:0.85rem;color:var(--text-muted);font-weight:500}
.share-btn{display:inline-flex;align-items:center;gap:0.4rem;padding:0.4rem 0.8rem;border:1px solid var(--border);border-radius:20px;background:transparent;color:var(--text-secondary);font-size:0.8rem;cursor:pointer;transition:all var(--tr);font-family:var(--font-sans)}
.share-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Related Posts */
.related-posts{margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border)}
.related-posts h3{font-family:var(--font-serif);font-size:1.3rem;margin-bottom:1rem}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}
.related-card{display:flex;gap:0.75rem;padding:0.75rem;border:1px solid var(--border);border-radius:var(--radius-sm);transition:all var(--tr)}
.related-card:hover{border-color:var(--accent);background:var(--accent-glow)}
.related-card img{width:80px;height:60px;object-fit:cover;border-radius:6px;flex-shrink:0}
.related-card h4{font-size:0.88rem;line-height:1.4;margin-bottom:0.2rem}
.related-card p{font-size:0.78rem;color:var(--text-muted)}

/* Post Actions Bar */
.post-actions-bar{display:flex;align-items:center;justify-content:center;gap:1rem;margin:2rem 0;padding:1rem 0}
.post-action-btn{display:inline-flex;align-items:center;gap:0.4rem;padding:0.5rem 1rem;border:1px solid var(--border);border-radius:20px;background:transparent;color:var(--text-secondary);font-size:0.85rem;cursor:pointer;transition:all var(--tr);font-family:var(--font-sans)}
.post-action-btn:hover{border-color:var(--accent);color:var(--accent)}
.post-action-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Archive Page */
.archive-page{max-width:var(--max-w);margin:0 auto;padding:5rem 2rem 3rem}
.archive-header{text-align:center;margin-bottom:3rem}
.archive-title{font-family:var(--font-serif);font-size:2rem;font-weight:800}
.archive-subtitle{color:var(--text-secondary);margin-top:0.5rem}
.archive-year{font-family:var(--font-serif);font-size:1.5rem;font-weight:700;margin:2rem 0 1rem;color:var(--accent)}
.archive-list{display:flex;flex-direction:column;gap:0.5rem}
.archive-item{display:flex;align-items:center;gap:1rem;padding:0.75rem 1rem;border-radius:var(--radius-sm);transition:background var(--tr)}
.archive-item:hover{background:var(--accent-glow)}
.archive-date{font-family:var(--font-mono);font-size:0.8rem;color:var(--text-muted);flex-shrink:0;width:80px}
.archive-item-title{font-size:0.95rem;color:var(--text)}

/* Categories Page */
.categories-page{max-width:var(--max-w);margin:0 auto;padding:5rem 2rem 3rem}
.category-group{margin-bottom:3rem}
.category-group-title{font-family:var(--font-serif);font-size:1.4rem;font-weight:700;margin-bottom:1rem;display:flex;align-items:center;gap:0.5rem}
.category-count{font-size:0.8rem;background:var(--accent-glow);color:var(--accent);padding:0.15rem 0.6rem;border-radius:10px;font-weight:500}

/* Tags Cloud */
.tags-cloud{display:flex;flex-wrap:wrap;gap:0.5rem;margin-bottom:3rem}
.tag-pill{padding:0.4rem 1rem;background:var(--tag-bg);color:var(--tag-text);border-radius:20px;font-size:0.85rem;cursor:pointer;transition:all var(--tr);border:1px solid transparent}
.tag-pill:hover,.tag-pill.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Projects Page */
.projects-page{max-width:var(--max-w);margin:0 auto;padding:5rem 2rem 3rem}
.projects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}
.project-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;transition:all var(--tr)}
.project-card:hover{box-shadow:var(--card-hover);border-color:var(--accent)}
.project-card h3{font-size:1.1rem;font-weight:700;margin-bottom:0.5rem}
.project-card p{font-size:0.88rem;color:var(--text-secondary);line-height:1.6;margin-bottom:0.75rem}
.project-tech{display:flex;gap:0.4rem;flex-wrap:wrap;margin-bottom:0.75rem}
.project-tech span{font-size:0.75rem;padding:0.15rem 0.5rem;background:var(--tag-bg);color:var(--tag-text);border-radius:10px}
.project-links{display:flex;gap:0.75rem}
.project-links a{font-size:0.85rem;font-weight:500}

/* Guestbook */
.guestbook-page{max-width:var(--content-w);margin:0 auto;padding:5rem 2rem 3rem}
.guestbook-form{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:2rem}
.guestbook-form input,.guestbook-form textarea{width:100%;padding:0.75rem 1rem;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text);font-size:0.9rem;font-family:var(--font-sans);outline:none;transition:border-color var(--tr);margin-bottom:0.75rem}
.guestbook-form input:focus,.guestbook-form textarea:focus{border-color:var(--accent)}
.guestbook-form textarea{min-height:100px;resize:vertical}
.guestbook-form button{padding:0.6rem 1.5rem;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);font-size:0.9rem;cursor:pointer;transition:opacity var(--tr);font-family:var(--font-sans)}
.guestbook-form button:hover{opacity:0.9}
.gb-messages{display:flex;flex-direction:column;gap:1rem}
.gb-msg{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:1rem}
.gb-msg-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:0.5rem}
.gb-msg-name{font-weight:600;font-size:0.9rem}
.gb-msg-date{font-size:0.78rem;color:var(--text-muted)}
.gb-msg-text{font-size:0.88rem;color:var(--text-secondary);line-height:1.6}.gb-delete{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:0.85rem;padding:0.15rem 0.4rem;border-radius:4px;transition:all var(--tr);line-height:1}.gb-delete:hover{background:#ef4444;color:#fff}

/* About Page */
.about-page{max-width:var(--content-w);margin:0 auto;padding:5rem 2rem 3rem}.about-page .fade-in{opacity:1;transform:none}
.about-header{text-align:center;margin-bottom:3rem}
.about-avatar{width:90px;height:90px;border-radius:50%;object-fit:cover;margin:0 auto 1rem;display:block}
.about-name{font-family:var(--font-serif);font-size:2rem;font-weight:800}
.about-role{color:var(--text-secondary);margin-top:0.25rem}
.about-stats{display:flex;justify-content:center;gap:3rem;margin-bottom:3rem}
.about-stat{text-align:center}
.about-stat-number{font-size:1.8rem;font-weight:700;color:var(--accent)}
.about-stat-label{font-size:0.8rem;color:var(--text-muted)}
.about-section{margin-bottom:2.5rem}
.about-section-title{font-family:var(--font-serif);font-size:1.3rem;font-weight:700;margin-bottom:1rem}
.about-section p{color:var(--text-secondary);line-height:1.8;margin-bottom:0.75rem}
.about-tags{display:flex;flex-wrap:wrap;gap:0.5rem}
.about-tag{padding:0.4rem 1rem;background:var(--tag-bg);color:var(--tag-text);border-radius:20px;font-size:0.85rem}
.about-tech{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1rem}
.about-tech-group{padding:1rem;border:1px solid var(--border);border-radius:var(--radius-sm)}
.about-tech-group h3{font-size:0.9rem;font-weight:600;margin-bottom:0.4rem}
.about-tech-group p{font-size:0.85rem;color:var(--text-secondary)}
.about-social{display:flex;gap:1rem;flex-wrap:wrap}
.about-social a{display:inline-flex;align-items:center;gap:0.5rem;padding:0.5rem 1rem;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:0.88rem;transition:all var(--tr);color:var(--accent);font-weight:500}
.about-social a:hover{border-color:var(--accent);background:var(--accent-glow)}.qq-link{display:inline-block;font-family:var(--font-sans);font-size:1rem;font-weight:500;padding:0.3rem 1rem;background:var(--accent-glow);border-radius:12px;letter-spacing:0;transition:all var(--tr);font-style:normal;margin-top:0.4rem;color:var(--accent);text-decoration:none}.qq-link:hover{background:var(--accent);color:#fff}.qq-link:hover{background:var(--accent);color:#fff;-webkit-text-fill-color:#fff}.qq-contact{border-color:#12B7F5!important}.qq-contact:hover{background:rgba(18,183,245,0.15)!important;border-color:#12B7F5!important}

/* 404 Page */
.page-404{min-height:80vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:2rem}
.page-404 h1{font-size:6rem;font-weight:800;background:var(--hero-grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.page-404 p{font-size:1.1rem;color:var(--text-secondary);margin:1rem 0 2rem}
.btn-primary{display:inline-block;padding:0.7rem 1.5rem;background:var(--accent);color:#fff;border-radius:var(--radius-sm);font-weight:500;transition:opacity var(--tr)}
.btn-primary:hover{opacity:0.9;color:#fff}

/* Lightbox */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,0.9);z-index:3000;display:none;align-items:center;justify-content:center;cursor:zoom-out}
.lightbox.open{display:flex}
.lightbox img{max-width:90%;max-height:90%;border-radius:var(--radius-sm)}

/* Back to Top */
.back-to-top{position:fixed;bottom:2rem;right:2rem;width:44px;height:44px;border-radius:50%;background:var(--card-bg);border:1px solid var(--border);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.2rem;color:var(--text-secondary);opacity:0;pointer-events:none;transition:all var(--tr);z-index:100;box-shadow:var(--card-shadow)}
.back-to-top.visible{opacity:1;pointer-events:all}
.back-to-top:hover{border-color:var(--accent);color:var(--accent)}

/* Copy Button */
.code-block-wrapper{position:relative}
.copy-btn{position:absolute;top:0.5rem;right:0.5rem;padding:0.25rem 0.6rem;background:var(--tag-bg);border:1px solid var(--border);border-radius:4px;font-size:0.75rem;cursor:pointer;color:var(--text-muted);transition:all var(--tr);font-family:var(--font-sans)}
.copy-btn:hover{color:var(--accent);border-color:var(--accent)}
.copy-btn.copied{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Read Next */
.read-next{margin-top:2.5rem;padding-top:2rem;border-top:1px solid var(--border)}
.read-next h3{font-family:var(--font-serif);font-size:1.3rem;margin-bottom:1rem}
.read-next-card{display:flex;gap:1rem;padding:1rem;border:1px solid var(--border);border-radius:var(--radius);transition:all var(--tr);text-decoration:none;color:var(--text)}
.read-next-card:hover{border-color:var(--accent);box-shadow:var(--card-hover);color:var(--text)}
.read-next-info{flex:1;display:flex;flex-direction:column;justify-content:center}
.read-next-cat{font-size:0.78rem;color:var(--accent);font-weight:500;margin-bottom:0.3rem}
.read-next-info h4{font-size:1rem;font-weight:700;margin-bottom:0.3rem;line-height:1.4}
.read-next-info p{font-size:0.82rem;color:var(--text-secondary)}
.read-next-card img{width:140px;height:100px;object-fit:cover;border-radius:var(--radius-sm);flex-shrink:0}
@media(max-width:768px){.read-next-card img{width:100px;height:80px}}

/* AI News Banner */
.ai-news-banner{max-width:var(--max-w);margin:0 auto;padding:0 1.5rem 0.5rem}
.ai-news-card{display:flex;align-items:center;gap:0.75rem;padding:0.6rem 1rem;background:linear-gradient(135deg,rgba(99,102,241,0.08),rgba(167,139,250,0.08));border:1px solid var(--accent);border-radius:var(--radius);text-decoration:none;color:var(--text);transition:all var(--tr);position:relative;overflow:hidden}
.ai-news-card::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(99,102,241,0.15),rgba(167,139,250,0.15));opacity:0;transition:opacity var(--tr)}
.ai-news-card:hover{box-shadow:0 8px 24px rgba(99,102,241,0.2);transform:translateY(-2px);color:var(--text)}
.ai-news-card:hover::before{opacity:1}
.ai-news-icon{font-size:1.3rem;position:relative;z-index:1;animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.1)}}
.ai-news-text{flex:1;position:relative;z-index:1}
.ai-news-text h3{font-size:1.1rem;font-weight:700;margin-bottom:0.15rem;background:linear-gradient(135deg,var(--accent),#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.ai-news-text p{font-size:0.85rem;color:var(--text-secondary)}
.ai-news-arrow{font-size:1.3rem;color:var(--accent);position:relative;z-index:1;transition:transform var(--tr)}
.ai-news-card:hover .ai-news-arrow{transform:translateX(4px)}
/* Footer */
.footer{text-align:center;padding:3rem 2rem;font-size:0.85rem;color:var(--text-muted);border-top:1px solid var(--border);margin-top:2rem}

/* Animations */
.fade-in{opacity:0;transform:translateY(20px);transition:all 0.6s cubic-bezier(0.4,0,0.2,1)}.fade-in.visible{opacity:1;transform:translateY(0)}@media (scripting: none){.fade-in{opacity:1;transform:none}}
.fade-in.visible{opacity:1;transform:translateY(0)}
.stagger-1{transition-delay:0.1s}
.stagger-2{transition-delay:0.2s}
.stagger-3{transition-delay:0.3s}
.stagger-4{transition-delay:0.4s}

/* Page Content */
.page-content{max-width:var(--max-w);margin:0 auto;padding:5rem 2rem 3rem}

/* Mobile */
@media(max-width:768px){
  .nav-toggle{display:flex}
  .nav-links{position:fixed;top:64px;left:0;right:0;background:var(--nav-bg);backdrop-filter:blur(var(--nav-blur));flex-direction:column;padding:1.5rem 2rem;gap:1rem;border-bottom:1px solid var(--border);transform:translateY(-100%);opacity:0;pointer-events:none;transition:all var(--tr)}
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:all;animation:slideDown 0.25s ease-out}
  .posts-grid{grid-template-columns:1fr}
  .hero{padding:4rem 1rem 0.3rem}
  .hero-stats{gap:1.5rem}
  .section{padding:0 1.5rem 2rem}
  .toc{display:none}
  .post-page{padding:4.5rem 1.25rem 2rem}
  .about-stats{gap:1.5rem}
  .about-tech{grid-template-columns:1fr}
  .projects-grid{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .archive-item{flex-direction:column;align-items:flex-start;gap:0.25rem}
}