/* STOS Website v1.1 — Complete Styles */
:root {
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-card: #17171a;
    --bg-card-hover: #1e1e22;
    --border: #27272a;
    --border-hover: #3f3f46;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --accent: #6366f1;
    --accent-secondary: #8b5cf6;
    --gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --max-width: 1200px;
    --nav-height: 64px;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--bg-primary); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; }
.text-muted { color: var(--text-tertiary); font-size: 0.85rem; }
.gradient-text { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.6rem 1.2rem; border-radius: 8px; font-weight: 600; font-size: 0.875rem; transition: all 0.2s; cursor: pointer; border: none; }
.btn-primary { background: var(--gradient); color: #fff; }
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-secondary { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--border-hover); color: var(--text-primary); }
.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }

/* Badge */
.badge { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.35rem 0.8rem; border-radius: 20px; background: rgba(99,102,241,0.1); border: 1px solid rgba(99,102,241,0.2); font-size: 0.8rem; color: var(--accent); font-weight: 500; }
.badge-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.5} }

/* Chapter Tag */
.chapter-tag { display: inline-block; padding: 0.25rem 0.8rem; border-radius: 20px; background: var(--gradient); color: #fff; font-size: 0.75rem; font-weight: 700; margin-bottom: 1rem; letter-spacing: 0.05em; }

/* Navbar */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(10,10,11,0.8); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav-container { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; display: flex; align-items: center; justify-content: space-between; height: var(--nav-height); }
.logo { display: flex; align-items: center; gap: 0.5rem; }
.logo-icon { font-size: 1.5rem; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.logo-text { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.02em; }
.nav-links { display: flex; gap: 2rem; }
.nav-links a { color: var(--text-secondary); font-size: 0.875rem; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text-secondary); margin: 5px 0; transition: all 0.3s; }

/* Hero */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding-top: var(--nav-height); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.gradient-orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.3; }
.orb-1 { width: 600px; height: 600px; background: var(--accent); top: -200px; right: -100px; }
.orb-2 { width: 400px; height: 400px; background: var(--accent-secondary); bottom: -100px; left: -50px; }
.grid-pattern { position: absolute; inset: 0; background-image: linear-gradient(rgba(99,102,241,0.03) 1px,transparent 1px), linear-gradient(90deg,rgba(99,102,241,0.03) 1px,transparent 1px); background-size: 60px 60px; }
.hero-container { position: relative; z-index: 1; max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; display: flex; align-items: center; gap: 4rem; width: 100%; }
.hero-content { flex: 1; }
.hero-title { font-size: 3.5rem; font-weight: 800; line-height: 1.1; margin: 1.5rem 0; letter-spacing: -0.03em; }
.hero-subtitle { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 2rem; max-width: 520px; line-height: 1.7; }
.hero-cta { display: flex; gap: 1rem; margin-bottom: 3rem; }
.hero-stats { display: flex; gap: 3rem; }
.stat-number { display: block; font-size: 2rem; font-weight: 800; }
.stat-label { font-size: 0.8rem; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.05em; }

/* Code Window */
.hero-code { flex: 0 0 460px; }
.code-window { background: #111; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.code-header { display: flex; align-items: center; gap: 6px; padding: 12px 16px; background: #0d0d0d; border-bottom: 1px solid var(--border); }
.code-dot { width: 10px; height: 10px; border-radius: 50%; }
.code-dot.red { background: #ef4444; }
.code-dot.yellow { background: #f59e0b; }
.code-dot.green { background: #22c55e; }
.code-title { margin-left: auto; font-size: 0.75rem; color: var(--text-tertiary); font-family: var(--font-mono); }
.code-content { padding: 1.25rem; font-family: var(--font-mono); font-size: 0.8rem; line-height: 1.7; color: #e4e4e7; overflow-x: auto; }
.code-keyword { color: #c084fc; }
.code-variable { color: #67e8f9; }
.code-string { color: #86efac; }
.code-number { color: #fbbf24; }
.code-comment { color: #52525b; font-style: italic; }
.code-class { color: #60a5fa; }
.code-method { color: #f9a8d4; }
.code-sm .code-content { font-size: 0.75rem; padding: 1rem; }

/* Sections */
.section { padding: 6rem 0; }
.section-dark { background: var(--bg-secondary); }
.section-header { text-align: center; margin-bottom: 4rem; }
.section-header h2 { font-size: 2.5rem; font-weight: 800; margin-bottom: 0.75rem; letter-spacing: -0.02em; }
.section-header p { font-size: 1.05rem; color: var(--text-secondary); max-width: 650px; margin: 0 auto; line-height: 1.7; }
.sub-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.5rem; }
.sub-desc { color: var(--text-secondary); margin-bottom: 2rem; }

/* Defect Cards */
.defect-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-bottom: 3rem; }
.defect-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 2rem; transition: all 0.3s; }
.defect-card:hover { border-color: var(--border-hover); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.3); }
.defect-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.defect-card h3 { font-size: 1.3rem; margin-bottom: 0.25rem; }
.defect-subtitle { color: var(--accent); font-size: 0.85rem; margin-bottom: 1rem; }
.defect-card > p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1.25rem; line-height: 1.6; }
.defect-list { display: flex; flex-direction: column; gap: 0.5rem; }
.defect-list li { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: var(--text-secondary); }
.defect-x { color: var(--error); font-weight: 700; }

/* Transition Block */
.transition-block { text-align: center; padding: 3rem 0; }
.transition-title { font-size: 1.8rem; font-weight: 700; margin-bottom: 1.5rem; }
.transition-end { font-size: 1.1rem; color: var(--text-secondary); margin-top: 1.5rem; font-style: italic; }

/* Eight Systems Grid */
.eight-systems { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin: 2rem auto; max-width: 700px; }
.es-item { display: flex; flex-direction: column; align-items: center; gap: 0.3rem; padding: 1rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; font-size: 0.85rem; transition: all 0.3s; }
.es-item:hover { border-color: var(--accent); transform: translateY(-2px); }
.es-icon { font-size: 1.5rem; }

/* Belief Layers */
.belief-layers { margin-bottom: 4rem; }
.layer-stack { display: flex; flex-direction: column; gap: 1rem; }
.belief-layer { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; transition: all 0.3s; }
.layer-meta { border-left: 3px solid var(--accent); }
.layer-l0 { border-left: 3px solid var(--accent-secondary); margin-left: 1.5rem; }
.layer-l1 { border-left: 3px solid #a855f7; margin-left: 3rem; }
.layer-header { display: flex; align-items: center; gap: 1rem; padding: 1rem 1.5rem; cursor: pointer; user-select: none; }
.layer-header:hover { background: var(--bg-card-hover); }
.layer-badge { padding: 0.25rem 0.6rem; border-radius: 6px; font-size: 0.75rem; font-weight: 700; white-space: nowrap; }
.badge-meta { background: rgba(99,102,241,0.15); color: var(--accent); }
.badge-l0 { background: rgba(139,92,246,0.15); color: var(--accent-secondary); }
.badge-l1 { background: rgba(168,85,247,0.15); color: #a855f7; }
.layer-count { font-size: 0.85rem; color: var(--text-secondary); }
.layer-desc { font-size: 0.8rem; color: var(--text-tertiary); flex: 1; }
.layer-toggle { width: 28px; height: 28px; border-radius: 6px; background: var(--bg-primary); border: 1px solid var(--border); color: var(--text-secondary); font-size: 1.1rem; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all 0.3s; flex-shrink: 0; }
.layer-toggle:hover { border-color: var(--accent); color: var(--accent); }
.belief-layer.open .layer-toggle { transform: rotate(45deg); }
.layer-content { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s; padding: 0 1.5rem; }
.belief-layer.open .layer-content { max-height: 800px; padding: 0 1.5rem 1.5rem; }
.belief-list { display: flex; flex-direction: column; gap: 0.5rem; }
.belief-list li { padding: 0.5rem 0.75rem; background: var(--bg-primary); border-radius: 6px; font-size: 0.85rem; color: var(--text-secondary); border-left: 2px solid transparent; }
.belief-list li:hover { border-left-color: var(--accent); color: var(--text-primary); }

/* Resonance Demo */
.resonance-demo { margin-bottom: 4rem; }
.signal-bars { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 2rem; }
.signal-row { display: flex; align-items: center; gap: 0.75rem; }
.signal-tag { width: 32px; text-align: center; font-weight: 700; font-size: 0.8rem; font-family: var(--font-mono); padding: 0.2rem 0; border-radius: 4px; }
.signal-pp { color: var(--success); background: rgba(34,197,94,0.1); }
.signal-p { color: #4ade80; background: rgba(74,222,128,0.1); }
.signal-0 { color: var(--text-tertiary); background: rgba(113,113,122,0.1); }
.signal-n { color: var(--warning); background: rgba(245,158,11,0.1); }
.signal-nn { color: var(--error); background: rgba(239,68,68,0.1); }
.signal-bar { flex: 1; height: 8px; background: var(--bg-primary); border-radius: 4px; overflow: hidden; }
.signal-fill { height: 100%; border-radius: 4px; transition: width 0.6s ease; }
.signal-label { font-size: 0.8rem; color: var(--text-tertiary); white-space: nowrap; }
.demo-box { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 2rem; }
.demo-title { font-size: 1.1rem; margin-bottom: 1rem; }
.demo-input-wrap { margin-bottom: 1.5rem; }
.demo-input { width: 100%; padding: 0.8rem 1rem; background: var(--bg-primary); border: 1px solid var(--border); border-radius: 8px; color: var(--text-primary); font-size: 0.95rem; font-family: var(--font-sans); outline: none; transition: border-color 0.2s; }
.demo-input:focus { border-color: var(--accent); }
.demo-input::placeholder { color: var(--text-tertiary); }
.demo-result { min-height: 60px; }
.demo-placeholder { color: var(--text-tertiary); font-size: 0.9rem; text-align: center; padding: 1.5rem; }

/* Drift Section */
.drift-section { margin-bottom: 3rem; }
.drift-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: start; }
.drift-flow { display: flex; flex-direction: column; gap: 0.5rem; }
.drift-step { display: flex; align-items: flex-start; gap: 0.75rem; padding: 0.75rem; background: var(--bg-card); border-radius: 8px; border: 1px solid var(--border); }
.drift-num { width: 28px; height: 28px; border-radius: 50%; background: var(--gradient); display: flex; align-items: center; justify-content: center; font-size: 0.8rem; font-weight: 700; flex-shrink: 0; }
.drift-arrow { text-align: center; color: var(--text-tertiary); font-size: 1.2rem; }
.drift-step strong { font-size: 0.9rem; }
.drift-code { display: flex; flex-direction: column; gap: 0.75rem; }

/* Tools Grid */
.tools-grid { margin-top: 3rem; }
.tool-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; margin-top: 1.5rem; }
.tool-card { display: flex; flex-direction: column; gap: 0.3rem; padding: 0.75rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; font-size: 0.8rem; }
.tool-card code { color: var(--accent); font-family: var(--font-mono); font-size: 0.75rem; }
.tool-card span { color: var(--text-tertiary); font-size: 0.7rem; }

/* Body Map (Health) */
.body-map { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 3rem; }
.body-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem; transition: all 0.3s; }
.body-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.body-emoji { font-size: 1.8rem; display: block; margin-bottom: 0.5rem; }
.body-card h4 { font-size: 0.85rem; margin-bottom: 0.25rem; }
.body-desc { font-size: 0.75rem; color: var(--text-tertiary); }

/* Health Report */
.health-report { max-width: 600px; margin: 0 auto; }
.report-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 2rem; }
.report-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; font-weight: 600; }
.report-date { font-size: 0.8rem; color: var(--text-tertiary); font-weight: 400; }
.report-total { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 0.75rem; }
.report-total-label { font-size: 0.9rem; color: var(--text-secondary); }
.report-total-score { font-size: 1.8rem; font-weight: 800; }
.report-bar-wrap { margin-bottom: 1.5rem; }
.report-bar { height: 8px; background: var(--bg-primary); border-radius: 4px; overflow: hidden; }
.report-bar-fill { height: 100%; border-radius: 4px; background: var(--gradient); transition: width 1s ease-out; }
.report-items { display: flex; flex-direction: column; gap: 0.6rem; }
.report-item { display: flex; align-items: center; gap: 0.75rem; }
.ri-name { font-size: 0.8rem; color: var(--text-secondary); min-width: 70px; }
.report-item .report-bar { flex: 1; }
.ri-score { font-size: 0.8rem; font-weight: 600; min-width: 36px; text-align: right; }
.report-advice { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--border); font-size: 0.8rem; color: var(--text-tertiary); }

/* Three Column / Four Column */
.three-col { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.four-col { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }

/* Concept Card */
.concept-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; transition: all 0.3s; }
.concept-card:hover { border-color: var(--border-hover); }
.concept-icon { font-size: 2rem; margin-bottom: 0.75rem; display: block; }
.concept-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.concept-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }
.concept-tag { display: inline-block; margin-top: 0.75rem; padding: 0.2rem 0.5rem; background: rgba(99,102,241,0.1); color: var(--accent); border-radius: 4px; font-size: 0.7rem; font-family: var(--font-mono); }

/* Insight Block */
.insight-block { background: var(--bg-card); border-left: 3px solid var(--accent); border-radius: 0 12px 12px 0; padding: 1.5rem 2rem; }
.insight-block h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.insight-block p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* Urgency Cards (Ch6) */
.urgency-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; text-align: center; transition: all 0.3s; }
.urgency-card:hover { transform: translateY(-3px); }
.urgency-level { font-size: 2rem; font-weight: 800; font-family: var(--font-mono); margin-bottom: 0.5rem; }
.urgency-card h4 { font-size: 1rem; margin-bottom: 0.5rem; }
.urgency-card p { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 0.5rem; }
.urgency-example { font-size: 0.75rem; color: var(--text-tertiary); font-style: italic; }
.urgency-l1 { border-color: var(--error); } .urgency-l1 .urgency-level { color: var(--error); }
.urgency-l2 { border-color: var(--warning); } .urgency-l2 .urgency-level { color: var(--warning); }
.urgency-l3 { border-color: #fbbf24; } .urgency-l3 .urgency-level { color: #fbbf24; }
.urgency-l4 { border-color: var(--success); } .urgency-l4 .urgency-level { color: var(--success); }

/* Pulse Grid (Ch9) */
.pulse-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.pulse-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; text-align: center; transition: all 0.3s; }
.pulse-card:hover { transform: translateY(-2px); }
.pulse-freq { font-size: 2rem; font-weight: 800; font-family: var(--font-mono); background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 0.5rem; }
.pulse-card h4 { font-size: 1rem; margin-bottom: 0.3rem; }
.pulse-card p { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 0.5rem; }
.pulse-metaphor { font-size: 0.75rem; color: var(--text-tertiary); font-style: italic; }
.pulse-fast { border-color: rgba(99,102,241,0.3); }
.pulse-slow { border-color: rgba(139,92,246,0.3); }
.pulse-slowest { border-color: rgba(168,85,247,0.3); }

/* Formula Block (Ch10) */
.formula-block { text-align: center; padding: 3rem 2rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; margin-bottom: 3rem; }
.formula { font-size: 1.1rem; font-family: var(--font-mono); color: var(--text-secondary); margin-bottom: 1rem; line-height: 1.8; }
.formula-note { font-size: 0.9rem; color: var(--text-tertiary); }
.organic-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.organic-item { padding: 1.25rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }
.organic-item strong { color: var(--text-primary); }

/* Deploy Grid (Ch11) */
.deploy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.deploy-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; position: relative; }
.deploy-badge { position: absolute; top: -10px; right: 16px; padding: 0.2rem 0.6rem; background: var(--success); color: #fff; font-size: 0.7rem; font-weight: 700; border-radius: 4px; }
.deploy-card h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }

/* Evolution Timeline (Ch12) */
.evolution-timeline { display: flex; align-items: stretch; gap: 0; }
.evo-step { flex: 1; background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; text-align: center; }
.evo-step h4 { font-size: 1rem; margin: 0.5rem 0; }
.evo-step p { font-size: 0.8rem; color: var(--text-secondary); }
.evo-badge { display: inline-block; padding: 0.2rem 0.6rem; border-radius: 6px; font-size: 0.7rem; font-weight: 600; background: rgba(113,113,122,0.15); color: var(--text-tertiary); }
.evo-current { border-color: var(--accent); }
.badge-current { background: rgba(99,102,241,0.2) !important; color: var(--accent) !important; }
.evo-arrow { display: flex; align-items: center; color: var(--text-tertiary); font-size: 1.5rem; padding: 0 0.5rem; }

/* Ethics Grid */
.ethics-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.ethics-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; }
.ethics-card h4 { font-size: 1rem; margin-bottom: 0.5rem; }
.ethics-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }

/* Final CTA */
.final-cta { text-align: center; padding: 3rem 0; }
.final-quote { font-size: 1.15rem; color: var(--text-secondary); line-height: 2; margin-bottom: 2rem; font-style: italic; max-width: 700px; margin-left: auto; margin-right: auto; }

/* Agent Topology */
.agent-topology { display: flex; flex-direction: column; align-items: center; gap: 0; margin-bottom: 3rem; padding: 2rem; }
.topo-row { display: flex; align-items: center; justify-content: center; gap: 0; }
.topo-node { display: flex; flex-direction: column; align-items: center; gap: 0.2rem; padding: 1rem 1.5rem; background: var(--bg-card); border: 2px solid var(--border); border-radius: 12px; min-width: 100px; transition: all 0.3s; }
.topo-node:hover { border-color: var(--accent); transform: scale(1.05); }
.tn-name { font-weight: 700; font-size: 1rem; }
.tn-role { font-size: 0.75rem; color: var(--text-tertiary); }
.node-mingjing { border-color: var(--accent); }
.node-mingde, .node-mingpin { border-color: rgba(99,102,241,0.4); }
.node-mingma { border-color: var(--accent-secondary); }
.node-mingzhen, .node-mingcha { border-color: rgba(168,85,247,0.4); }
.topo-connector { width: 40px; height: 2px; background: var(--border); }
.topo-line-vertical { width: 2px; height: 24px; background: var(--border); }

/* Agent Cards */
.agent-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.agent-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; transition: all 0.3s; }
.agent-card:hover { border-color: var(--border-hover); }
.agent-name { font-size: 1.5rem; font-weight: 800; margin-bottom: 0.25rem; }
.agent-aspect { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 6px; font-size: 0.7rem; font-weight: 600; margin-bottom: 0.5rem; }
.aspect-dao { background: rgba(99,102,241,0.15); color: var(--accent); }
.aspect-xin { background: rgba(139,92,246,0.15); color: var(--accent-secondary); }
.aspect-xing { background: rgba(168,85,247,0.15); color: #a855f7; }
.agent-title { display: block; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 0.75rem; }
.agent-duties { display: flex; flex-direction: column; gap: 0.25rem; margin-bottom: 0.75rem; }
.agent-duties li { font-size: 0.8rem; color: var(--text-secondary); padding-left: 0.75rem; position: relative; }
.agent-duties li::before { content: '·'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.agent-power { font-size: 0.75rem; padding: 0.2rem 0.5rem; background: rgba(34,197,94,0.1); color: var(--success); border-radius: 4px; display: inline-block; }

/* Footer */
.footer { padding: 2rem 0; border-top: 1px solid var(--border); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; }
.footer p { font-size: 0.85rem; color: var(--text-tertiary); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: 0.85rem; color: var(--text-tertiary); transition: color 0.2s; }
.footer-links a:hover { color: var(--text-primary); }

/* Animations */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible, .fade-in.fade-in-visible { opacity: 1; transform: translateY(0); }
@keyframes fadeIn { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }

/* Responsive */
@media (max-width: 1024px) {
    .hero-container { flex-direction: column; gap: 2rem; }
    .hero-code { flex: none; width: 100%; max-width: 500px; }
    .defect-grid, .three-col, .ethics-grid { grid-template-columns: 1fr; }
    .four-col, .pulse-grid { grid-template-columns: repeat(2, 1fr); }
    .body-map { grid-template-columns: repeat(2, 1fr); }
    .tool-cards { grid-template-columns: repeat(2, 1fr); }
    .agent-cards { grid-template-columns: repeat(2, 1fr); }
    .drift-grid, .organic-grid { grid-template-columns: 1fr; }
    .deploy-grid { grid-template-columns: 1fr; }
    .layer-l0 { margin-left: 0.75rem; }
    .layer-l1 { margin-left: 1.5rem; }
    .eight-systems { grid-template-columns: repeat(4, 1fr); }
    .evolution-timeline { flex-direction: column; gap: 0; }
    .evo-arrow { transform: rotate(90deg); justify-content: center; padding: 0.5rem; }
}
@media (max-width: 768px) {
    .nav-links { display: none; position: fixed; top: var(--nav-height); left: 0; right: 0; background: rgba(10,10,11,0.95); backdrop-filter: blur(12px); flex-direction: column; padding: 1.5rem 2rem; gap: 1rem; border-bottom: 1px solid var(--border); }
    .nav-links.open { display: flex; }
    .nav-toggle { display: block; }
    .hero-title { font-size: 2.2rem; }
    .section-header h2 { font-size: 1.8rem; }
    .defect-grid, .three-col, .four-col, .pulse-grid, .body-map, .agent-cards, .tool-cards, .deploy-grid, .ethics-grid { grid-template-columns: 1fr; }
    .eight-systems { grid-template-columns: repeat(4, 1fr); }
    .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
    .topo-node { min-width: 80px; padding: 0.75rem; }
    .topo-connector { width: 20px; }
    .formula { font-size: 0.9rem; }
}