:root,[data-theme=light]{--pt-bg: #f8fafc;--pt-surface: #ffffff;--pt-panel-bg: #ffffff;--pt-panel-border: #e5e7eb;--pt-text-primary: #111827;--pt-text-secondary: #4b5563;--pt-text-muted: #9ca3af;--pt-primary: #1e3a8a;--pt-primary-light: #dbeafe;--pt-primary-hover: #1e40af;--pt-primary-foreground: #ffffff;--pt-success: #059669;--pt-warning: #d97706;--pt-error: #dc2626;--pt-info: #0284c7;--pt-tutorial-tag: #eff6ff;--pt-tutorial-tag-text: #1d4ed8;--pt-note-tag: #f0fdf4;--pt-note-tag-text: #15803d;--pt-tool-tag: #fff7ed;--pt-tool-tag-text: #c2410c;--pt-physics-tag: #faf5ff;--pt-physics-tag-text: #7c3aed;--pt-backend-tag: #f0fdf4;--pt-backend-tag-text: #15803d;--pt-divider: #f3f4f6;--pt-hover-bg: #f9fafb;--pt-shadow-sm: 0 1px 2px rgba(0,0,0,.04);--pt-shadow-md: 0 4px 12px rgba(0,0,0,.06);--pt-shadow-lg: 0 12px 32px rgba(0,0,0,.1);--pt-hero-gradient: linear-gradient(180deg, #eef2ff 0%, #f8fafc 100%)}[data-theme=dark]{--pt-bg: #000000;--pt-surface: #0a0a0a;--pt-panel-bg: rgba(24, 24, 27, .7);--pt-panel-border: rgba(255, 255, 255, .08);--pt-text-primary: #f1f5f9;--pt-text-secondary: #a1a1aa;--pt-text-muted: #71717a;--pt-primary: #6366f1;--pt-primary-light: rgba(99, 102, 241, .15);--pt-primary-hover: #818cf8;--pt-primary-foreground: #ffffff;--pt-success: #34d399;--pt-warning: #fbbf24;--pt-error: #f87171;--pt-info: #60a5fa;--pt-tutorial-tag: rgba(96, 165, 250, .12);--pt-tutorial-tag-text: #93c5fd;--pt-note-tag: rgba(52, 211, 153, .12);--pt-note-tag-text: #6ee7b7;--pt-tool-tag: rgba(251, 146, 60, .12);--pt-tool-tag-text: #fdba74;--pt-physics-tag: rgba(167, 139, 250, .12);--pt-physics-tag-text: #c4b5fd;--pt-backend-tag: rgba(52, 211, 153, .12);--pt-backend-tag-text: #6ee7b7;--pt-divider: rgba(255, 255, 255, .06);--pt-hover-bg: rgba(255, 255, 255, .04);--pt-shadow-sm: 0 1px 2px rgba(0,0,0,.3);--pt-shadow-md: 0 4px 16px rgba(0,0,0,.3);--pt-shadow-lg: 0 12px 40px rgba(0,0,0,.4);--pt-hero-gradient: linear-gradient(180deg, rgba(99,102,241,.1) 0%, transparent 100%)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,Noto Sans SC,PingFang SC,Microsoft YaHei,system-ui,sans-serif;background:var(--pt-bg);color:var(--pt-text-primary);font-size:15px;line-height:1.6;transition:background-color .3s ease,color .3s ease;min-height:100vh}.ambient-glow{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:-1}.ambient-glow:before{content:"";position:absolute;top:-200px;left:-100px;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(99,102,241,.1) 0%,transparent 65%);filter:blur(60px);opacity:0;transition:opacity .4s ease}[data-theme=dark] .ambient-glow:before{opacity:1}.ambient-glow:after{content:"";position:absolute;top:200px;right:-100px;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(139,92,246,.08) 0%,transparent 65%);filter:blur(50px);opacity:0;transition:opacity .4s ease}[data-theme=dark] .ambient-glow:after{opacity:1}.top-nav{position:sticky;top:0;z-index:50;background:var(--pt-panel-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--pt-panel-border);height:56px;display:flex;align-items:center;padding:0 20px;transition:background-color .3s ease,border-color .3s ease}.top-nav .logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:16px;color:var(--pt-text-primary);text-decoration:none}.top-nav .logo svg{color:var(--pt-primary)}.top-nav .nav-links{margin-left:32px;display:flex;gap:4px}.top-nav .nav-links a{padding:8px 14px;border-radius:6px;font-size:14px;color:var(--pt-text-secondary);text-decoration:none;transition:all .2s ease;position:relative}.top-nav .nav-links a:hover{color:var(--pt-primary);background:var(--pt-primary-light)}.top-nav .nav-links a.active{color:var(--pt-primary);font-weight:500}.top-nav .nav-actions{margin-left:auto;display:flex;align-items:center;gap:4px}.icon-btn{width:36px;height:36px;border-radius:8px;border:none;background:transparent;color:var(--pt-text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:14px;transition:all .2s ease}.icon-btn:hover{background:var(--pt-primary-light);color:var(--pt-primary)}.theme-icon-dark{display:none}.theme-icon-light,[data-theme=dark] .theme-icon-dark{display:inline-block}[data-theme=dark] .theme-icon-light,.menu-toggle{display:none}.page-hero{padding:48px 20px 32px;text-align:center;background:var(--pt-hero-gradient)}.page-hero-inner{max-width:720px;margin:0 auto}.page-hero h1{font-size:32px;font-weight:700;color:var(--pt-text-primary);margin-bottom:10px;letter-spacing:-.02em}.page-hero p{font-size:16px;color:var(--pt-text-secondary);line-height:1.6}.main-container{max-width:1200px;margin:0 auto;padding:32px 20px 64px}.content-grid{display:grid;grid-template-columns:1fr 300px;gap:32px;align-items:start}.search-bar{margin-bottom:20px}.search-input-wrapper{position:relative;display:flex;align-items:center;background:var(--pt-panel-bg);border:1.5px solid var(--pt-panel-border);border-radius:12px;transition:all .2s ease;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.search-input-wrapper:focus-within{border-color:var(--pt-primary);box-shadow:0 0 0 3px var(--pt-primary-light)}.search-icon{position:absolute;left:16px;font-size:15px;color:var(--pt-text-muted);transition:color .2s}.search-input-wrapper:focus-within .search-icon{color:var(--pt-primary)}.search-input{flex:1;padding:14px 44px;border:none;background:transparent;font-size:15px;color:var(--pt-text-primary);font-family:inherit;outline:none;width:100%}.search-input::placeholder{color:var(--pt-text-muted)}.search-clear{position:absolute;right:10px;width:28px;height:28px;border-radius:50%;border:none;background:transparent;color:var(--pt-text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:13px;opacity:0;visibility:hidden;transition:all .2s ease}.search-clear:hover{background:var(--pt-hover-bg);color:var(--pt-text-primary)}.search-clear.visible{opacity:1;visibility:visible}.search-hint{margin-top:8px;font-size:13px;color:var(--pt-text-muted);display:flex;align-items:center;gap:6px}.search-hint i{color:var(--pt-warning);font-size:12px}.search-result-info{margin-bottom:16px;font-size:14px;color:var(--pt-text-secondary);padding:8px 0}.search-result-info strong{color:var(--pt-primary);font-weight:600}.empty-state{text-align:center;padding:60px 20px;background:var(--pt-panel-bg);border:1px solid var(--pt-panel-border);border-radius:12px;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.empty-icon{width:64px;height:64px;margin:0 auto 16px;border-radius:50%;background:var(--pt-primary-light);display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--pt-primary)}.empty-title{font-size:18px;font-weight:600;color:var(--pt-text-primary);margin-bottom:8px}.empty-desc{font-size:14px;color:var(--pt-text-secondary)}.empty-desc a{color:var(--pt-primary);text-decoration:none;font-weight:500}.empty-desc a:hover{text-decoration:underline}.filter-bar{margin-bottom:24px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.filter-tab{padding:7px 16px;border-radius:20px;font-size:14px;font-weight:500;color:var(--pt-text-secondary);background:transparent;border:1px solid transparent;cursor:pointer;transition:all .2s ease;white-space:nowrap}.filter-tab:hover{color:var(--pt-primary);background:var(--pt-primary-light)}.filter-tab.active{color:#fff;background:var(--pt-primary);border-color:var(--pt-primary)}.filter-tab .count{margin-left:4px;font-size:12px;opacity:.7}.filter-spacer{flex:1}.filter-sort{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--pt-text-muted)}.filter-sort select{padding:5px 10px;border-radius:6px;border:1px solid var(--pt-panel-border);background:var(--pt-panel-bg);color:var(--pt-text-primary);font-size:13px;cursor:pointer;outline:none}.article-list{display:flex;flex-direction:column;gap:16px}.article-card{display:flex;gap:20px;padding:20px;background:var(--pt-panel-bg);border:1px solid var(--pt-panel-border);border-radius:12px;text-decoration:none;transition:all .25s ease;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.article-card:hover{transform:translateY(-2px);box-shadow:var(--pt-shadow-lg);border-color:var(--pt-primary)}.article-card-cover{flex-shrink:0;width:180px;aspect-ratio:16 / 10;border-radius:8px;background:linear-gradient(135deg,var(--pt-primary-light) 0%,rgba(99,102,241,.1) 100%);display:flex;align-items:center;justify-content:center;color:var(--pt-primary);font-size:36px;overflow:hidden;position:relative}.article-card-cover .cover-icon{opacity:.5;transition:transform .3s ease}.article-card:hover .cover-icon{transform:scale(1.1)}.article-card-body{flex:1;min-width:0;display:flex;flex-direction:column}.article-card-top{display:flex;align-items:center;gap:8px;margin-bottom:8px}.article-type-tag{display:inline-flex;align-items:center;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:600;line-height:1.6}.article-type-tag.tutorial{background:var(--pt-tutorial-tag);color:var(--pt-tutorial-tag-text)}.article-type-tag.note{background:var(--pt-note-tag);color:var(--pt-note-tag-text)}.article-type-tag.tool{background:var(--pt-tool-tag);color:var(--pt-tool-tag-text)}.article-type-tag.physics{background:var(--pt-physics-tag);color:var(--pt-physics-tag-text)}.article-type-tag.backend{background:var(--pt-backend-tag);color:var(--pt-backend-tag-text)}.article-card-title{font-size:18px;font-weight:600;color:var(--pt-text-primary);line-height:1.4;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s}.article-card:hover .article-card-title{color:var(--pt-primary)}.article-card-excerpt{font-size:14px;color:var(--pt-text-secondary);line-height:1.6;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}.article-card-footer{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--pt-text-muted);flex-wrap:wrap}.article-card-footer .meta-item{display:flex;align-items:center;gap:4px}.article-card-footer .meta-item i{font-size:12px}.article-card-tags{display:flex;gap:6px;margin-left:auto;flex-wrap:wrap}.article-tag-sm{padding:2px 8px;border-radius:4px;font-size:11px;background:var(--pt-panel-border);color:var(--pt-text-secondary)}.pagination{margin-top:32px;display:flex;justify-content:center;align-items:center;gap:4px}.page-btn{min-width:36px;height:36px;padding:0 10px;border-radius:8px;border:1px solid var(--pt-panel-border);background:var(--pt-panel-bg);color:var(--pt-text-secondary);font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.page-btn:hover{border-color:var(--pt-primary);color:var(--pt-primary)}.page-btn.active{background:var(--pt-primary);border-color:var(--pt-primary);color:#fff;font-weight:500}.page-btn.disabled{opacity:.4;cursor:not-allowed;pointer-events:none}.page-ellipsis{padding:0 6px;color:var(--pt-text-muted);font-size:14px}.sidebar{display:flex;align-self:start;flex-direction:column;gap:20px}.sidebar-panel{background:var(--pt-panel-bg);border:1px solid var(--pt-panel-border);border-radius:12px;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);overflow:hidden}.sidebar-header{padding:14px 16px;border-bottom:1px solid var(--pt-panel-border);font-weight:600;font-size:15px;color:var(--pt-text-primary);display:flex;align-items:center;gap:8px}.sidebar-header i{color:var(--pt-primary);font-size:14px}.sidebar-body{padding:8px}.hot-list{list-style:none}.hot-list li{display:block}.hot-link{display:flex;gap:10px;padding:10px 12px;border-radius:8px;cursor:pointer;transition:background .2s ease;text-decoration:none;color:inherit}.hot-link:hover{background:var(--pt-hover-bg)}.hot-rank{flex-shrink:0;width:20px;height:20px;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;background:var(--pt-panel-border);color:var(--pt-text-muted);margin-top:2px}.hot-list li:nth-child(1) .hot-rank{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff}.hot-list li:nth-child(2) .hot-rank{background:linear-gradient(135deg,#9ca3af,#6b7280);color:#fff}.hot-list li:nth-child(3) .hot-rank{background:linear-gradient(135deg,#d97706,#b45309);color:#fff}.hot-info{flex:1;min-width:0}.hot-title{font-size:14px;color:var(--pt-text-primary);line-height:1.4;margin-bottom:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.hot-meta{font-size:12px;color:var(--pt-text-muted);display:flex;align-items:center;gap:8px}.hot-meta i{font-size:10px}.category-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:10px}.category-item{display:flex;align-items:center;gap:6px;padding:8px 10px;border-radius:8px;font-size:13px;color:var(--pt-text-secondary);cursor:pointer;transition:all .2s ease;text-decoration:none}.category-item:hover{background:var(--pt-primary-light);color:var(--pt-primary)}.category-item i{font-size:14px}.category-item .count{margin-left:auto;font-size:12px;color:var(--pt-text-muted)}.category-item:hover .count{color:var(--pt-primary)}.tag-cloud{padding:12px;display:flex;flex-wrap:wrap;gap:6px}.tag-chip{padding:4px 10px;border-radius:16px;font-size:12px;background:var(--pt-panel-border);color:var(--pt-text-secondary);cursor:pointer;transition:all .2s ease}.tag-chip:hover{background:var(--pt-primary);color:#fff}.site-footer{padding:32px 20px 40px;border-top:1px solid var(--pt-divider);text-align:center;font-size:13px;color:var(--pt-text-muted);margin-top:20px}.site-footer a{color:var(--pt-text-secondary);text-decoration:none}.site-footer a:hover{color:var(--pt-primary)}.footer-links{display:flex;justify-content:center;gap:20px;margin-bottom:14px}@media(max-width:900px){.content-grid{grid-template-columns:1fr;gap:24px}.top-nav .nav-links{display:none}.menu-toggle{display:flex}}@media(max-width:640px){.top-nav{height:48px;padding:0 14px}.page-hero{padding:32px 14px 24px}.page-hero h1{font-size:24px}.page-hero p{font-size:14px}.main-container{padding:20px 14px 48px;gap:16px}.article-card{flex-direction:column;gap:12px;padding:16px}.article-card-cover{width:100%;aspect-ratio:16 / 9}.article-card-title{font-size:16px}.article-card-excerpt{font-size:13px;-webkit-line-clamp:3}.article-card-footer{font-size:12px}.article-card-tags{margin-left:0;width:100%}.search-input{padding:12px 40px;font-size:14px}.search-icon{left:14px;font-size:13px}.search-hint{font-size:12px}.empty-state{padding:40px 16px}.empty-icon{width:56px;height:56px;font-size:20px}.empty-title{font-size:16px}.filter-bar{gap:4px}.filter-tab{padding:6px 12px;font-size:13px}.filter-sort{display:none}.page-btn{min-width:32px;height:32px;font-size:13px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}
