.layout{min-height:100vh;display:flex;flex-direction:column}.header{height:var(--header-height);border-bottom:1px solid var(--color-border);background:var(--color-bg);position:sticky;top:0;z-index:100}.nav{max-width:var(--max-width);margin:0 auto;padding:0 var(--space-lg);height:100%;display:flex;align-items:center;gap:var(--space-xl)}.nav-brand{font-size:1.1rem;font-weight:700;color:var(--color-text);white-space:nowrap}.nav-brand:hover{color:var(--color-text)}.nav-links{display:flex;gap:var(--space-sm);margin-left:auto}.nav-link{padding:var(--space-sm) var(--space-md);border-radius:var(--radius-sm);color:var(--color-text-secondary);font-size:.9rem;font-weight:500;transition:color .15s,background .15s}.nav-link:hover{color:var(--color-text);background:var(--color-bg-secondary)}.nav-link--active,.nav-link--active:hover{color:var(--color-accent);background:var(--color-accent-light)}.main{flex:1;max-width:var(--max-width);margin:0 auto;padding:var(--space-3xl) 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var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-secondary)}.disclaimer-title{font-size:.9rem;font-weight:600;color:var(--color-text-secondary);margin-bottom:var(--space-sm)}.disclaimer-list{list-style:none;padding:0}.disclaimer-list li{font-size:.85rem;color:var(--color-text-muted);padding:var(--space-xs) 0;padding-left:var(--space-md);position:relative}.disclaimer-list li:before{content:"";position:absolute;left:0;top:.6em;width:6px;height:6px;border-radius:50%;background:var(--color-text-muted)}@media (max-width: 640px){.hero-title{font-size:1.5rem}.hero-tagline{font-size:1rem}.entry-grid,.capability-grid{grid-template-columns:1fr}}.demo{display:flex;flex-direction:column;gap:var(--space-xl)}.demo-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--space-md)}.demo-header h1{font-size:1.5rem;font-weight:700}.demo-badges{display:flex;gap:var(--space-sm)}.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.75rem;font-weight:500}.badge-mock{background:var(--color-warning);color:#fff}.badge-step{background:var(--color-bg-tertiary);color:var(--color-text-secondary)}.demo-notice{padding:var(--space-md);background:var(--color-accent-light);border-radius:var(--radius-md);border-left:3px solid var(--color-accent)}.demo-notice p{font-size:.85rem;color:var(--color-text-secondary)}.step-nav{display:flex;gap:var(--space-xs);overflow-x:auto;padding-bottom:var(--space-sm)}.step-dot{display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-xs) var(--space-sm);border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-bg);cursor:pointer;white-space:nowrap;font-size:.8rem;color:var(--color-text-muted);transition:all .15s}.step-dot:disabled{cursor:not-allowed;opacity:.5}.step-dot--done{border-color:var(--color-success);color:var(--color-text-secondary)}.step-dot--active{border-color:var(--color-accent);background:var(--color-accent-light);color:var(--color-accent);font-weight:600}.step-dot-num{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:50%;background:var(--color-bg-tertiary);font-size:.7rem;font-weight:600}.step-dot--active .step-dot-num{background:var(--color-accent);color:#fff}.step-dot--done .step-dot-num{background:var(--color-success);color:#fff}.step-content{min-height:400px}.step-card{padding:var(--space-xl);border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-bg);box-shadow:var(--shadow-sm)}.step-card h2{font-size:1.2rem;font-weight:600;margin-bottom:var(--space-xs)}.step-desc{font-size:.9rem;color:var(--color-text-secondary);margin-bottom:var(--space-lg)}.input{width:100%;padding:var(--space-sm) var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:.9rem;font-family:inherit;outline:none;transition:border-color .15s}.input:focus{border-color:var(--color-accent)}.textarea{min-height:80px;resize:vertical}.textarea-large{min-height:120px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--space-sm) var(--space-lg);border:1px solid transparent;border-radius:var(--radius-md);font-size:.9rem;font-weight:500;cursor:pointer;transition:all .15s}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-accent-hover)}.btn-secondary{background:var(--color-bg-secondary);border-color:var(--color-border);color:var(--color-text-secondary)}.btn-secondary:hover{background:var(--color-bg-tertiary)}.btn-reset{background:transparent;border:1px solid var(--color-border);color:var(--color-text-muted);font-size:.85rem}.btn-reset:hover{border-color:var(--color-danger);color:var(--color-danger)}.btn-row{display:flex;gap:var(--space-md);margin-top:var(--space-lg)}.interview-item{margin-bottom:var(--space-md)}.interview-question{display:block;font-weight:500;margin-bottom:var(--space-xs);color:var(--color-text)}.roadmap-list,.task-list{display:flex;flex-direction:column;gap:var(--space-sm)}.roadmap-item,.task-item{display:flex;align-items:flex-start;gap:var(--space-md);padding:var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-secondary)}.roadmap-order{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--color-accent);color:#fff;font-size:.8rem;font-weight:600;flex-shrink:0}.roadmap-item--completed .roadmap-order{background:var(--color-success)}.roadmap-item--pending .roadmap-order{background:var(--color-text-muted)}.roadmap-content{flex:1}.roadmap-content h3,.task-content h3{font-size:.95rem;font-weight:600}.roadmap-content p,.task-content p{font-size:.85rem;color:var(--color-text-secondary);margin-top:2px}.task-item{align-items:center}.task-content{flex:1}.status-tag{display:inline-block;padding:2px 8px;border-radius:var(--radius-sm);font-size:.75rem;font-weight:500;white-space:nowrap}.status-tag--completed{background:#dcfce7;color:#166534}.status-tag--active,.status-tag--in_progress{background:#dbeafe;color:#1e40af}.status-tag--pending{background:var(--color-bg-tertiary);color:var(--color-text-muted)}.eval-score{display:flex;align-items:baseline;gap:2px;margin-bottom:var(--space-lg)}.eval-score-num{font-size:2.5rem;font-weight:700;color:var(--color-accent)}.eval-score-label{font-size:1rem;color:var(--color-text-muted)}.eval-section{margin-bottom:var(--space-md)}.eval-section h3{font-size:.9rem;font-weight:600;margin-bottom:var(--space-xs)}.eval-section ul{list-style:none;padding:0}.eval-section li{font-size:.85rem;color:var(--color-text-secondary);padding:var(--space-xs) 0;padding-left:var(--space-md);position:relative}.eval-section li:before{content:"";position:absolute;left:0;top:.55em;width:5px;height:5px;border-radius:50%;background:var(--color-accent)}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:var(--space-md);margin-bottom:var(--space-lg)}.knowledge-card{padding:var(--space-md);border-radius:var(--radius-md);border:1px solid var(--color-border)}.knowledge-card-type{display:inline-block;font-size:.75rem;font-weight:600;margin-bottom:var(--space-xs)}.knowledge-card p{font-size:.85rem;color:var(--color-text)}.card-insight{background:#f0fdf4;border-color:#bbf7d0}.card-insight .knowledge-card-type{color:#166534}.card-misconception{background:#fef2f2;border-color:#fecaca}.card-misconception .knowledge-card-type{color:#991b1b}.card-weakness{background:#fffbeb;border-color:#fde68a}.card-weakness .knowledge-card-type{color:#92400e}.card-correction{background:#eff6ff;border-color:#bfdbfe}.card-correction .knowledge-card-type{color:#1e40af}.plan-summary,.plan-section{margin-bottom:var(--space-md)}.plan-summary h3,.plan-section h3{font-size:.9rem;font-weight:600;margin-bottom:var(--space-xs)}.plan-summary p,.plan-section li{font-size:.85rem;color:var(--color-text-secondary)}.plan-section ul{list-style:none;padding:0}.plan-section li{padding:var(--space-xs) 0;padding-left:var(--space-md);position:relative}.plan-section li:before{content:"";position:absolute;left:0;top:.55em;width:5px;height:5px;border-radius:50%;background:var(--color-accent)}.demo-footer{display:flex;justify-content:center;padding-top:var(--space-md)}@media (max-width: 640px){.step-card{padding:var(--space-md)}.btn-row{flex-direction:column}.btn-row .btn{width:100%}.card-grid{grid-template-columns:1fr}.roadmap-item,.task-item{flex-direction:column}}.architecture{display:flex;flex-direction:column;gap:var(--space-2xl)}.data-flow{display:flex;flex-direction:column;gap:var(--space-sm);padding:var(--space-lg);background:var(--color-bg-secondary);border-radius:var(--radius-lg);border:1px solid var(--color-border)}.flow-row{display:flex;align-items:center;gap:var(--space-md)}.flow-node{display:flex;flex-direction:column;padding:var(--space-sm) var(--space-md);background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);min-width:120px}.flow-node-label{font-size:.85rem;font-weight:600;color:var(--color-accent)}.flow-node-desc{font-size:.75rem;color:var(--color-text-muted)}.flow-arrow{display:flex;align-items:center;color:var(--color-text-muted);font-size:.8rem;flex-shrink:0}.flow-arrow-line{display:inline-block;width:24px;height:1px;background:var(--color-border);margin-right:2px}.principle-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--space-md)}.principle-card{padding:var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg)}.principle-card h3{font-size:.9rem;font-weight:600;margin-bottom:var(--space-xs);color:var(--color-accent)}.principle-card p{font-size:.85rem;color:var(--color-text-secondary);line-height:1.6}.tech-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:var(--space-md)}.tech-group{padding:var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-secondary)}.tech-category{font-size:.85rem;font-weight:600;color:var(--color-text-secondary);margin-bottom:var(--space-sm)}.tech-list{list-style:none;padding:0}.tech-list li{font-size:.85rem;color:var(--color-text);padding:2px 0}.persist-layer{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:var(--space-md)}.persist-box{padding:var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg)}.persist-box h3{font-size:.85rem;font-weight:600;margin-bottom:var(--space-sm);color:var(--color-text-secondary)}.persist-box ul{list-style:none;padding:0}.persist-box li{font-size:.85rem;color:var(--color-text);padding:2px 0;padding-left:var(--space-md);position:relative}.persist-box li:before{content:"";position:absolute;left:0;top:.55em;width:5px;height:5px;border-radius:50%;background:var(--color-accent)}@media (max-width: 640px){.flow-row{flex-direction:column;align-items:stretch;gap:var(--space-xs)}.flow-arrow{justify-content:center;transform:rotate(90deg);margin:var(--space-xs) 0}.principle-grid,.tech-grid,.persist-layer{grid-template-columns:1fr}}.desktop-app{display:flex;flex-direction:column;gap:var(--space-2xl)}.page-title{font-size:1.5rem;font-weight:700}.page-desc{color:var(--color-text-secondary);margin-top:var(--space-xs)}.section{display:flex;flex-direction:column;gap:var(--space-md)}.section-title{font-size:1.1rem;font-weight:600;padding-bottom:var(--space-sm);border-bottom:1px solid var(--color-border)}.section-desc{font-size:.9rem;color:var(--color-text-secondary)}.screenshot-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:var(--space-md)}.screenshot-card{border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;background:var(--color-bg)}.screenshot-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;height:160px;background:var(--color-bg-tertiary);gap:var(--space-sm)}.screenshot-icon{font-size:2rem;opacity:.4}.screenshot-label{font-size:.85rem;color:var(--color-text-muted);font-weight:500}.screenshot-desc{padding:var(--space-sm) var(--space-md);font-size:.8rem;color:var(--color-text-secondary);text-align:center}.video-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;height:240px;background:var(--color-bg-tertiary);border-radius:var(--radius-lg);border:2px dashed var(--color-border);gap:var(--space-sm)}.video-icon{font-size:2.5rem;opacity:.4}.video-label{font-size:.9rem;color:var(--color-text-muted)}.tech-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--space-sm)}.tech-item{display:flex;flex-direction:column;padding:var(--space-sm) var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-secondary)}.tech-name{font-size:.85rem;font-weight:600;color:var(--color-text)}.tech-desc{font-size:.75rem;color:var(--color-text-muted)}.req-list,.limitation-list{list-style:none;padding:0}.req-list li,.limitation-list li{font-size:.9rem;padding:var(--space-xs) 0;padding-left:var(--space-md);position:relative;color:var(--color-text-secondary)}.req-list li:before{content:"";position:absolute;left:0;top:.55em;width:6px;height:6px;border-radius:50%;background:var(--color-success)}.limitation-list li:before{content:"";position:absolute;left:0;top:.55em;width:6px;height:6px;border-radius:50%;background:var(--color-warning)}.code{font-family:var(--font-mono);font-size:.85rem;padding:1px 6px;background:var(--color-bg-tertiary);border-radius:var(--radius-sm);color:var(--color-text)}@media (max-width: 640px){.screenshot-grid,.tech-list{grid-template-columns:1fr}.screenshot-placeholder{height:120px}}:root{--color-bg: #ffffff;--color-bg-secondary: #f8f9fa;--color-bg-tertiary: #f1f3f4;--color-text: #1a1a2e;--color-text-secondary: #5f6368;--color-text-muted: #80868b;--color-border: #e0e0e0;--color-accent: #3b82f6;--color-accent-hover: #2563eb;--color-accent-light: #eff6ff;--color-success: #10b981;--color-warning: #f59e0b;--color-danger: #ef4444;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--max-width: 960px;--header-height: 60px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-sans);line-height:1.6;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased}a{color:var(--color-accent);text-decoration:none}a:hover{color:var(--color-accent-hover)}