:root {
    /* Dark Theme (Default) */
    --bg: #0a0906;
    --fg: #e8e4dc;
    --accent: #d4954a;
    --accent-glow: rgba(212, 149, 74, 0.4);
    --accent-dim: rgba(212, 149, 74, 0.12);
    --muted: #1c1a17;
    --muted-fg: #8a8275;
    --card-bg: rgba(20, 18, 15, 0.85);
    --border: rgba(232, 228, 220, 0.08);
    --border-hover: rgba(212, 149, 74, 0.3);
    --spark-color: #FEF3C7;
    --nav-bg: rgba(10, 9, 6, 0.6);
    --grain-opacity: 0.05;
    --danger: #e06c6c;
    --success: #7aad80;
    
    /* Code/Command Specific */
    --code-bg: #000000;
    --code-fg: var(--accent);
    --code-border: var(--border);
    
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

body.light {
    /* Light Theme */
    --bg: #fdfbf7;
    --fg: #1c1a17;
    --accent: #c8873a;
    --accent-glow: rgba(200, 135, 58, 0.3);
    --accent-dim: rgba(200, 135, 58, 0.08);
    --muted: #f2efe9;
    --muted-fg: #7a7568;
    --card-bg: rgba(255, 255, 255, 0.85);
    --border: rgba(28, 26, 23, 0.1);
    --border-hover: rgba(200, 135, 58, 0.4);
    --spark-color: #c8873a;
    --nav-bg: rgba(253, 251, 247, 0.7);
    --grain-opacity: 0.025;
    
    /* Light Code Styling */
    --code-bg: #f1ede4;
    --code-fg: #9b4a1a; /* Darker amber for contrast */
    --code-border: rgba(28, 26, 23, 0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
/* Prevent FOUC: early light class set before body renders */
html.early-light { background-color: #fdfbf7; }

body {
    background-color: var(--bg);
    color: var(--fg);
    font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.4s var(--ease-out-expo), color 0.4s var(--ease-out-expo);
}

/* Atmosphere */
.grain {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 9999;
    opacity: var(--grain-opacity);
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3%3Ffilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.ambient-glow {
    position: absolute; width: 1000px; height: 800px;
    background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
    top: -300px; left: 50%; transform: translateX(-50%);
    pointer-events: none; z-index: 0;
}

h1, h2, h3, h4 { font-family: 'Lora', Georgia, serif; font-weight: 500; letter-spacing: -0.01em; }
.mono { font-family: 'IBM Plex Mono', monospace; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 1; }
.section { padding: 10rem 0; position: relative; }
.section-header { text-align: center; margin-bottom: 5rem; }
.section-header .mono { display: block; font-size: 0.75rem; color: var(--accent); margin-bottom: 1rem; letter-spacing: 0.2em; }
.section-header h2 { font-size: 2.5rem; }

/* Language Switcher Utilities — specificity must beat component rules */
[data-en], [data-zh] { display: none !important; }
html[lang="en"] [data-en] { display: block !important; }
html[lang="zh"] [data-zh] { display: block !important; }
html[lang="en"] span[data-en], html[lang="en"] a[data-en], html[lang="en"] code[data-en] { display: inline !important; }
html[lang="zh"] span[data-zh], html[lang="zh"] a[data-zh], html[lang="zh"] code[data-zh] { display: inline !important; }
html[lang="en"] ul[data-en], html[lang="en"] ol[data-en] { display: flex !important; }
html[lang="zh"] ul[data-zh], html[lang="zh"] ol[data-zh] { display: flex !important; }

.dark-bg { background: var(--muted); }

/* --- Navigation --- */
.nav-container {
    position: fixed; top: 0; width: 100%; z-index: 100;
    background: var(--nav-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding-top: env(safe-area-inset-top, 0px);
}
.nav-content { display: flex; justify-content: space-between; align-items: center; padding: 1rem 2rem; max-width: 1400px; margin: 0 auto; }
.logo-group { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; color: var(--fg); }
.logo-svg { width: 50px; height: 25px; color: var(--accent); }
.logo-text { font-family: 'IBM Plex Mono', monospace; font-weight: 600; font-size: 1.1rem; letter-spacing: -0.02em; }
.nav-right { display: flex; align-items: center; gap: 2.5rem; }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a { color: var(--muted-fg); text-decoration: none; font-size: 0.85rem; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--accent); }
.controls { display: flex; align-items: center; gap: 1rem; border-left: 1px solid var(--border); padding-left: 2rem; }
.control-btn {
    background: transparent; border: 1px solid var(--border); color: var(--muted-fg);
    width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    cursor: pointer; transition: all 0.2s;
}
.control-btn:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-dim); }
.btn-primary { background: var(--accent); color: #131210 !important; padding: 0.6rem 1.25rem; border-radius: 8px; font-size: 0.85rem; font-weight: 600; text-decoration: none; }

/* --- HERO --- */
.hero { text-align: center; padding-top: 14rem; padding-bottom: 6rem; background: radial-gradient(circle at 50% 30%, var(--accent-dim) 0%, transparent 60%); }
.tagline-badge {
    display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.4rem 1rem;
    background: var(--card-bg); border: 1px solid var(--border);
    color: var(--muted-fg); border-radius: 100px; font-size: 0.75rem; font-family: 'IBM Plex Mono', monospace;
    margin-bottom: 2.5rem;
}
.tagline-badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.hero h1 { font-size: clamp(3.2rem, 8vw, 5.8rem); line-height: 1.02; margin-bottom: 1.5rem; }
.accent-text { color: var(--accent); font-style: italic; }
.hero-sub { font-size: clamp(1.1rem, 2vw, 1.35rem); color: var(--muted-fg); max-width: 720px; margin: 0 auto 3.5rem; font-family: 'Lora', serif; font-style: italic; }

/* Hero CTA Group */
.hero-cta-group {
    display: flex; align-items: center; justify-content: center; gap: 1rem;
    margin-bottom: 2rem;
}
.cta-primary {
    display: inline-flex; align-items: center; gap: 0.5rem;
    background: var(--accent); color: #131210; padding: 0.85rem 2rem;
    border-radius: 12px; font-size: 0.95rem; font-weight: 700;
    text-decoration: none; transition: all 0.3s var(--ease-out-expo);
    box-shadow: 0 4px 20px rgba(212, 149, 74, 0.3);
}
.cta-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(212, 149, 74, 0.45); }
.cta-secondary {
    display: inline-flex; align-items: center; gap: 0.5rem;
    background: transparent; color: var(--fg); padding: 0.85rem 1.75rem;
    border-radius: 12px; font-size: 0.95rem; font-weight: 600;
    text-decoration: none; border: 1px solid var(--border);
    transition: all 0.3s var(--ease-out-expo);
}
.cta-secondary:hover { border-color: var(--muted-fg); background: var(--card-bg); }
.hero-trust-bar {
    display: flex; align-items: center; justify-content: center; gap: 1.25rem;
    font-family: 'IBM Plex Mono', monospace; font-size: 0.75rem;
    color: var(--muted-fg); letter-spacing: 0.04em;
}
.trust-tag { display: inline-flex; align-items: center; gap: 0.4rem; }
.trust-sep { width: 4px; height: 4px; border-radius: 50%; background: var(--border); }

/* --- Before × After Comparison --- */
.compare-section { position: relative; overflow: hidden; }
.compare-section::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent 10%, var(--border-hover) 50%, transparent 90%);
}

.compare-tabs {
    display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap;
    margin-bottom: 3rem;
}
.compare-tab {
    padding: 0.6rem 1.4rem; border-radius: 100px; border: 1px solid var(--border);
    background: transparent; color: var(--muted-fg); font-size: 0.82rem;
    font-family: 'IBM Plex Mono', monospace; cursor: pointer;
    transition: all 0.35s var(--ease-out-expo); letter-spacing: 0.02em;
}
.compare-tab:hover { border-color: var(--border-hover); color: var(--fg); }
.compare-tab.active {
    background: var(--accent); color: var(--bg); border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.compare-stage { display: none; }
.compare-stage.active { display: block; animation: compareFadeIn 0.5s var(--ease-out-expo); }
@keyframes compareFadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

.compare-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 0; max-width: 960px; margin: 0 auto;
    border-radius: 20px; overflow: hidden; border: 1px solid var(--border);
    background: var(--card-bg); backdrop-filter: blur(10px);
}

.compare-col { padding: 2.5rem; position: relative; }
.compare-col--before { border-right: 1px solid var(--border); }

.compare-col-badge {
    display: inline-flex; align-items: center; gap: 0.45rem;
    font-family: 'IBM Plex Mono', monospace; font-size: 0.68rem; font-weight: 600;
    letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1.5rem;
    padding: 0.35rem 0.85rem; border-radius: 100px;
}
.compare-col--before .compare-col-badge {
    background: rgba(224, 108, 108, 0.1); color: var(--danger); border: 1px solid rgba(224, 108, 108, 0.2);
}
.compare-col--after .compare-col-badge {
    background: var(--accent-dim); color: var(--accent); border: 1px solid var(--border-hover);
}

.compare-scenario {
    font-size: 0.95rem; line-height: 1.5; color: var(--fg); font-weight: 500;
    margin-bottom: 1.25rem; min-height: 2.5em;
}

.compare-steps { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.75rem; }
.compare-step {
    display: flex; gap: 0.75rem; align-items: flex-start;
    font-size: 0.84rem; line-height: 1.6; color: var(--muted-fg);
    padding: 0.65rem 0.85rem; border-radius: 10px;
    border: 1px solid transparent; transition: all 0.3s ease;
}
.compare-col--before .compare-step { background: rgba(224, 108, 108, 0.04); }
.compare-col--after .compare-step { background: var(--accent-dim); color: var(--fg); border-color: rgba(212, 149, 74, 0.08); }
.compare-step:hover { transform: translateX(2px); }

.compare-step-icon {
    flex-shrink: 0; width: 20px; height: 20px; border-radius: 6px;
    display: flex; align-items: center; justify-content: center; font-size: 0.7rem;
    margin-top: 0.15rem;
}
.compare-col--before .compare-step-icon { background: rgba(224, 108, 108, 0.15); color: var(--danger); }
.compare-col--after .compare-step-icon { background: rgba(212, 149, 74, 0.2); color: var(--accent); }

.compare-verdict {
    margin-top: 1.5rem; padding-top: 1.25rem; border-top: 1px solid var(--border);
    font-family: 'IBM Plex Mono', monospace; font-size: 0.78rem; color: var(--muted-fg);
    display: flex; align-items: center; gap: 0.5rem;
}
.compare-col--before .compare-verdict { color: var(--danger); opacity: 0.7; }
.compare-col--after .compare-verdict { color: var(--accent); }
.compare-verdict strong { font-size: 1.4rem; line-height: 1; }

/* --- Real Story Section --- */
.story-section { position: relative; }

.story-card {
    max-width: 780px; margin: 0 auto; position: relative;
    background: var(--card-bg); border: 1px solid var(--border); border-radius: 24px;
    padding: 3rem 3.5rem; backdrop-filter: blur(10px);
    transition: border-color 0.5s ease;
}
.story-card:hover { border-color: var(--border-hover); }
.story-card::before {
    content: ''; position: absolute; top: -60px; right: -60px;
    width: 200px; height: 200px; border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none; opacity: 0.4;
}

.story-quote-mark {
    font-family: Georgia, 'Lora', serif; font-size: 5rem; line-height: 1;
    color: var(--accent); opacity: 0.15; position: absolute; top: 1rem; left: 2.5rem;
    user-select: none;
}

.story-body { position: relative; z-index: 1; }
.story-body p {
    font-size: 1.05rem; line-height: 1.85; color: var(--fg); margin-bottom: 1.25rem;
    opacity: 0.9;
}
.story-body p:last-of-type { margin-bottom: 0; }

.story-highlight {
    display: inline; background: linear-gradient(120deg, var(--accent-dim) 0%, rgba(212, 149, 74, 0.22) 100%);
    padding: 0.1em 0.35em; border-radius: 4px; font-weight: 600; color: var(--accent);
    white-space: nowrap;
}

.story-stat {
    display: flex; align-items: center; justify-content: center; gap: 2.5rem;
    margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid var(--border);
}
.story-stat-item { text-align: center; }
.story-stat-num {
    font-family: 'IBM Plex Mono', monospace; font-size: 2.2rem; font-weight: 700;
    color: var(--accent); line-height: 1; display: block;
}
.story-stat-label {
    font-size: 0.75rem; color: var(--muted-fg); margin-top: 0.4rem; display: block;
    font-family: 'IBM Plex Mono', monospace; letter-spacing: 0.05em;
}
.story-stat-arrow {
    font-size: 1.5rem; color: var(--accent); opacity: 0.4;
}

.story-author {
    display: flex; align-items: center; gap: 1rem; margin-top: 2rem;
    padding-top: 1.5rem; border-top: 1px solid var(--border);
}
.story-author-avatar {
    width: 40px; height: 40px; border-radius: 10px;
    background: var(--accent-dim); color: var(--accent);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.story-author-name { font-size: 0.85rem; font-weight: 600; color: var(--fg); }
.story-author-role { font-size: 0.75rem; color: var(--muted-fg); margin-top: 0.15rem; }

/* --- 01. THE SHARED MIND LOOP --- */
.loop-section { padding: 8rem 0; background: var(--bg); position: relative; overflow: hidden; }

/* Three-column bridge layout */
.mind-bridge {
    display: grid; grid-template-columns: 1fr auto 1fr; gap: 0;
    align-items: stretch; max-width: 1200px; margin: 4rem auto 0;
    position: relative;
}

/* Side panels (Human & Agents) */
.bridge-side {
    background: var(--card-bg); border: 1px solid var(--border);
    border-radius: 20px; backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    display: flex; flex-direction: column;
    transition: all 0.5s var(--ease-out-expo);
    overflow: hidden;
}
.bridge-side:hover { border-color: var(--border-hover); box-shadow: 0 16px 48px rgba(0,0,0,0.15); }

.bridge-side-header {
    display: flex; align-items: center; gap: 1rem;
    padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border);
}
.bridge-side-header h3 { font-size: 1.05rem; margin: 0; line-height: 1.2; }
.bridge-side-sub { font-size: 0.75rem; color: var(--muted-fg); margin-top: 0.15rem; }

.bridge-avatar {
    width: 40px; height: 40px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.bridge-avatar--human { background: var(--accent-dim); color: var(--accent); }
.bridge-avatar--agent { background: rgba(122, 173, 128, 0.12); color: var(--success); }

/* Mind Files (left side) */
.mind-files { display: flex; flex-direction: column; gap: 0; flex: 1; }
.mind-file {
    display: flex; align-items: center; gap: 0.85rem;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border);
    transition: all 0.4s var(--ease-out-expo);
    position: relative;
}
.mind-file:last-child { border-bottom: none; }
.mind-file::before {
    content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
    background: var(--accent); opacity: 0; transition: opacity 0.4s;
    border-radius: 0 3px 3px 0;
}
.mind-file--active::before { opacity: 0.4; }
.mind-file--syncing { background: var(--accent-dim); }
.mind-file--syncing::before { opacity: 1; }
.mind-file--editing {
    animation: fileEditPulse 0.6s ease-in-out 2;
}
@keyframes fileEditPulse {
    0%, 100% { background: transparent; }
    50% { background: rgba(212, 149, 74, 0.18); }
}
.mind-file-icon { font-size: 1.25rem; flex-shrink: 0; width: 28px; text-align: center; }
.mind-file-name {
    display: block; font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem; font-weight: 600; color: var(--fg); line-height: 1.3;
}
.mind-file-desc { font-size: 0.7rem; color: var(--muted-fg); line-height: 1.3; margin-top: 0.1rem; }
.agent-slot-action { font-size: 0.7rem; color: var(--muted-fg); line-height: 1.3; margin-top: 0.1rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Center Bridge Hub */
.bridge-center {
    display: flex; flex-direction: column; align-items: center;
    justify-content: center; padding: 1.5rem 1rem;
    position: relative; min-width: 220px;
}
.bridge-hub {
    position: relative; width: 88px; height: 88px;
    display: flex; align-items: center; justify-content: center;
}
.bridge-hub-ring {
    position: absolute; inset: 0; border-radius: 50%;
    border: 1.5px solid var(--border);
    animation: hubSpin 12s linear infinite, hubPulse 6s ease-in-out infinite;
}
.bridge-hub-ring--inner {
    inset: 10px; border-color: var(--accent); opacity: 0.25;
    animation: hubSpin 8s linear infinite reverse, hubPulseInner 5s ease-in-out infinite;
}
.bridge-active .bridge-hub-ring {
    border-color: var(--accent); opacity: 0.5;
    animation: hubSpin 8s linear infinite, hubPulseActive 4s ease-in-out infinite;
}
.bridge-active .bridge-hub-ring--inner {
    opacity: 0.6; box-shadow: 0 0 20px var(--accent-glow);
    animation: hubSpin 5s linear infinite reverse, hubPulseActiveInner 3.2s ease-in-out infinite;
}
@keyframes hubSpin { to { transform: rotate(360deg); } }
@keyframes hubPulse {
    0%, 100% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.06); }
}
@keyframes hubPulseInner {
    0%, 100% { transform: rotate(0deg) scale(1); opacity: 0.25; }
    50% { transform: rotate(-180deg) scale(0.92); opacity: 0.4; }
}
@keyframes hubPulseActive {
    0%, 100% { transform: rotate(0deg) scale(1); border-width: 1.5px; }
    50% { transform: rotate(180deg) scale(1.1); border-width: 2.5px; }
}
@keyframes hubPulseActiveInner {
    0%, 100% { transform: rotate(0deg) scale(1); box-shadow: 0 0 20px var(--accent-glow); }
    50% { transform: rotate(-180deg) scale(0.88); box-shadow: 0 0 35px var(--accent-glow), 0 0 60px rgba(212,149,74,0.15); }
}

.bridge-hub-logo { width: 44px; height: 22px; color: var(--accent); position: relative; z-index: 1; }

.bridge-label {
    font-family: 'IBM Plex Mono', monospace; font-size: 0.85rem;
    font-weight: 700; color: var(--fg); margin-top: 0.75rem; letter-spacing: 0.04em;
}

/* MCP Protocol Status */
.bridge-protocol {
    display: flex; align-items: center; gap: 0.4rem;
    margin-top: 0.5rem; font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem;
    width: 100%; justify-content: center;
}
.bridge-protocol-tag {
    background: var(--accent-dim); color: var(--accent); padding: 0.15rem 0.5rem;
    border-radius: 4px; font-weight: 600; font-size: 0.6rem; letter-spacing: 0.05em;
}
.bridge-protocol-dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--muted-fg); transition: all 0.4s;
}
.bridge-protocol-dot--active { background: var(--success); box-shadow: 0 0 8px rgba(122, 173, 128, 0.6); }
.bridge-protocol-status {
    color: var(--muted-fg);
    display: inline-block;
    min-width: 15ch;
    text-align: left;
    white-space: nowrap;
}

/* Flow Particles */
.bridge-flow {
    position: absolute; top: 50%; height: 2px;
    display: flex; align-items: center; pointer-events: none;
}
.bridge-flow--left { right: 50%; left: -100%; margin-right: 52px; transform: translateY(-20px); }
.bridge-flow--right { left: 50%; right: -100%; margin-left: 52px; transform: translateY(-20px); }

.bridge-particle {
    position: absolute; width: 6px; height: 6px; border-radius: 50%;
    background: var(--accent); opacity: 0;
    box-shadow: 0 0 8px var(--accent-glow);
}
.bridge-active .bridge-flow--left .bridge-particle {
    animation: particleLeft 2.4s ease-in-out infinite;
}
.bridge-active .bridge-flow--right .bridge-particle {
    animation: particleRight 2.4s ease-in-out infinite;
}
@keyframes particleLeft {
    0% { right: 0; opacity: 0; }
    15% { opacity: 1; }
    85% { opacity: 1; }
    100% { right: 100%; opacity: 0; }
}
@keyframes particleRight {
    0% { left: 0; opacity: 0; }
    15% { opacity: 1; }
    85% { opacity: 1; }
    100% { left: 100%; opacity: 0; }
}

/* Agent Fleet (right side) */
.agent-fleet { display: flex; flex-direction: column; gap: 0; flex: 1; }
.agent-slot {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border);
    transition: all 0.4s var(--ease-out-expo);
    position: relative;
}
.agent-slot:last-child { border-bottom: none; }
.agent-slot::before {
    content: ''; position: absolute; right: 0; top: 0; bottom: 0; width: 3px;
    background: var(--success); opacity: 0; transition: opacity 0.4s;
    border-radius: 3px 0 0 3px;
}
.agent-slot--active { background: rgba(122, 173, 128, 0.05); }
.agent-slot--active::before { opacity: 0.6; }

.agent-slot-logo {
    width: 32px; height: 32px; border-radius: 8px;
    flex-shrink: 0; object-fit: contain;
}
.agent-slot-info { flex: 1; min-width: 0; }
.agent-slot-name {
    display: block; font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem; font-weight: 600; color: var(--fg); line-height: 1.3;
}
/* Agent Status Indicator */
.agent-slot-bar {
    position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
    background: var(--border); overflow: hidden;
}
.agent-slot-bar-fill {
    height: 100%; width: 0; background: var(--accent);
    box-shadow: 0 0 6px var(--accent-glow);
    transition: width 0s;
}
.agent-slot--done .agent-slot-bar-fill { background: var(--success); box-shadow: 0 0 6px rgba(122,173,128,0.4); }

.agent-slot-status {
    width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
    background: var(--border); transition: all 0.4s;
}
.agent-slot-status--running {
    background: var(--accent); box-shadow: 0 0 10px var(--accent-glow);
    animation: statusPulse 1.2s ease-in-out infinite;
}
.agent-slot-status--done {
    background: var(--success); box-shadow: 0 0 10px rgba(122, 173, 128, 0.5);
}
@keyframes statusPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.75); }
}

@keyframes blink { 50% { opacity: 0; } }

/* --- Vision & Features --- */
.section-sub { font-size: 1.05rem; color: var(--muted-fg); max-width: 680px; margin: 1rem auto 0; line-height: 1.7; }

/* --- Vision Section --- */
.vision-section {
    background: radial-gradient(ellipse at 50% 0%, var(--accent-dim) 0%, transparent 50%);
    position: relative; overflow: hidden;
}
.vision-section::before {
    content: ''; position: absolute; inset: 0;
    background: repeating-linear-gradient(
        0deg, transparent, transparent 80px,
        var(--border) 80px, var(--border) 81px
    );
    opacity: 0.08; pointer-events: none;
}

/* --- Pillar Cards (Vision Section) --- */
.pillar-stack { display: flex; flex-direction: column; gap: 2rem; max-width: 1020px; margin: 0 auto; }

.pillar-card {
    background: var(--card-bg); border: 1px solid var(--border); border-radius: 20px;
    padding: 0; overflow: hidden; backdrop-filter: blur(10px);
    transition: all 0.5s var(--ease-out-expo); position: relative;
}
.pillar-card::before {
    content: ''; position: absolute; inset: -1px; border-radius: 21px;
    background: linear-gradient(135deg, var(--accent) 0%, transparent 40%, transparent 60%, var(--accent) 100%);
    opacity: 0; transition: opacity 0.5s ease; z-index: -1;
}
.pillar-card:hover { border-color: transparent; box-shadow: 0 20px 60px rgba(0,0,0,0.2), 0 0 40px var(--accent-glow); transform: translateY(-4px); }
.pillar-card:hover::before { opacity: 0.35; }

.pillar-head {
    display: flex; align-items: center; gap: 1.25rem;
    padding: 1.75rem 2.5rem; border-bottom: 1px solid var(--border);
    position: relative;
}
.pillar-head::after {
    content: ''; position: absolute; bottom: -1px; left: 2.5rem; right: 2.5rem;
    height: 1px; background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0; transition: opacity 0.5s ease;
}
.pillar-card:hover .pillar-head::after { opacity: 0.4; }

.pillar-icon-wrap {
    width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0;
    background: var(--accent-dim); color: var(--accent);
    display: flex; align-items: center; justify-content: center;
    transition: all 0.4s ease; position: relative;
}
.pillar-icon-wrap::after {
    content: ''; position: absolute; inset: -3px; border-radius: 17px;
    border: 1px solid var(--accent); opacity: 0; transition: opacity 0.4s ease;
}
.pillar-card:hover .pillar-icon-wrap { background: var(--accent); color: var(--bg); transform: scale(1.08); }
.pillar-card:hover .pillar-icon-wrap::after { opacity: 0.3; }

.pillar-num {
    font-family: 'IBM Plex Mono', monospace; font-size: 2rem; font-weight: 700;
    color: var(--accent); opacity: 0.08; line-height: 1; flex-shrink: 0; margin-left: auto;
    transition: opacity 0.4s ease;
}
.pillar-card:hover .pillar-num { opacity: 0.2; }

.pillar-head h3 { font-size: 1.25rem; margin: 0; line-height: 1.3; font-weight: 600; }
.pillar-tagline { font-size: 0.78rem; color: var(--muted-fg); margin-top: 0.25rem; font-family: 'IBM Plex Mono', monospace; letter-spacing: 0.03em; font-style: italic; }

.pillar-body {
    display: grid; grid-template-columns: 1fr auto 1fr; gap: 0;
    padding: 2rem 2.5rem; align-items: start;
}

.pillar-col { padding: 0 0.75rem; }
.pillar-col p { font-size: 0.9rem; line-height: 1.7; color: var(--muted-fg); margin-top: 0.6rem; }

.pillar-list {
    list-style: none; padding: 0; margin: 0.75rem 0 0 0;
    flex-direction: column; gap: 0.5rem;
}
.pillar-list li {
    font-size: 0.86rem; line-height: 1.65; color: var(--muted-fg);
    padding-left: 1.2rem; position: relative;
    transition: color 0.3s ease, transform 0.3s ease;
}
.pillar-card:hover .pillar-shift .pillar-list li { transform: translateX(2px); }
.pillar-list li::before {
    content: ''; position: absolute; left: 0; top: 0.55em;
    width: 5px; height: 5px; border-radius: 50%;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.pillar-pain .pillar-list li::before { background: var(--danger); opacity: 0.5; }
.pillar-shift .pillar-list li::before { background: var(--accent); opacity: 0.7; }
.pillar-shift .pillar-list li { color: var(--fg); }
.pillar-card:hover .pillar-shift .pillar-list li::before { transform: scale(1.4); box-shadow: 0 0 10px var(--accent-glow); }

.pillar-label {
    display: flex; align-items: center; gap: 0.5rem;
    font-family: 'IBM Plex Mono', monospace; font-size: 0.68rem; font-weight: 600;
    letter-spacing: 0.12em; text-transform: uppercase;
}
.pillar-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.pillar-dot--pain { background: var(--danger); box-shadow: 0 0 8px rgba(224, 108, 108, 0.4); }
.pillar-dot--shift { background: var(--accent); box-shadow: 0 0 8px var(--accent-glow); }

.pillar-pain .pillar-label { color: var(--danger); }
.pillar-shift .pillar-label { color: var(--accent); }
.pillar-shift p { color: var(--fg); }

.pillar-arrow {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 0.35rem; color: var(--accent); opacity: 0.35; padding: 0 0.75rem; padding-top: 1.6rem;
    transition: opacity 0.4s ease;
}
.pillar-card:hover .pillar-arrow { opacity: 0.7; }
.pillar-arrow-line {
    width: 1px; height: 18px; background: currentColor; opacity: 0.5;
    transition: height 0.4s ease;
}
.pillar-card:hover .pillar-arrow-line { height: 24px; }
.pillar-arrow svg { transition: transform 0.4s ease; }
.pillar-card:hover .pillar-arrow svg { transform: translateX(3px); }

/* Foundation Banner */
.foundation-banner {
    display: flex; align-items: flex-start; gap: 1.5rem;
    margin-top: 2.5rem; padding: 2rem 2.5rem; max-width: 960px; margin-left: auto; margin-right: auto;
    background: var(--accent-dim); border: 1px solid var(--border-hover);
    border-radius: 16px; position: relative; overflow: hidden;
}
.foundation-banner::before {
    content: ''; position: absolute; top: -40px; right: -40px;
    width: 160px; height: 160px; border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
}
.foundation-icon { color: var(--accent); flex-shrink: 0; margin-top: 0.15rem; }
.foundation-content h4 { font-size: 1rem; color: var(--accent); margin-bottom: 0.5rem; }
.foundation-content p { font-size: 0.9rem; color: var(--fg); line-height: 1.7; opacity: 0.85; }

/* --- Features Grid --- */
.feat-row-label {
    display: flex; align-items: center; gap: 0.75rem;
    margin-bottom: 1.25rem;
}
.feat-row-label::after {
    content: ''; flex: 1; height: 1px;
    background: linear-gradient(90deg, var(--border) 0%, transparent 100%);
}
.feat-row-tag {
    font-family: 'IBM Plex Mono', monospace; font-size: 0.7rem; font-weight: 600;
    letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent);
    padding: 0.3rem 0.9rem; border-radius: 100px;
    background: var(--accent-dim); border: 1px solid rgba(212, 149, 74, 0.15);
    white-space: nowrap;
}
.feat-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem;
    margin-bottom: 1rem;
}
.feat-card {
    padding: 2rem 1.75rem; background: var(--card-bg); border: 1px solid var(--border);
    border-radius: 18px; backdrop-filter: blur(10px);
    transition: all 0.5s var(--ease-out-expo); position: relative; overflow: hidden;
}
.feat-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0; transition: opacity 0.4s;
}
.feat-card:hover {
    transform: translateY(-6px); border-color: var(--border-hover);
    box-shadow: 0 16px 48px rgba(0,0,0,0.15);
}
.feat-card:hover::before { opacity: 1; }
.feat-icon {
    width: 44px; height: 44px; border-radius: 12px;
    background: var(--accent-dim); color: var(--accent);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 1.25rem;
}
.feat-card h3 { font-size: 1.05rem; margin-bottom: 0.6rem; line-height: 1.3; }
.feat-card p { font-size: 0.85rem; color: var(--muted-fg); line-height: 1.65; }

/* --- Dual-Path Quickstart --- */
.qs-dual {
    display: grid; grid-template-columns: 1fr 1fr; gap: 2rem;
    max-width: 1100px; margin: 0 auto;
}
.qs-path {
    background: var(--card-bg); border: 1px solid var(--border); border-radius: 20px;
    overflow: hidden; backdrop-filter: blur(10px);
    transition: all 0.5s var(--ease-out-expo);
}
.qs-path:hover { border-color: var(--border-hover); box-shadow: 0 12px 40px rgba(0,0,0,0.15); }
.qs-path-header {
    display: flex; align-items: flex-start; gap: 1rem;
    padding: 1.5rem 1.75rem; border-bottom: 1px solid var(--border);
    text-align: left;
}
.qs-path-icon {
    width: 44px; height: 44px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.qs-path-icon--human { background: var(--accent-dim); color: var(--accent); }
.qs-path-icon--agent { background: rgba(122, 173, 128, 0.12); color: var(--success); }
.qs-path-header h3 { font-size: 1.1rem; margin: 0; line-height: 1.25; }
.qs-path-sub { font-size: 0.82rem; color: var(--muted-fg); margin-top: 0.25rem; line-height: 1.45; }
.qs-path-title-wrap { flex: 1; min-width: 0; }

.qs-path--default {
    border-color: var(--border-hover);
    box-shadow: 0 0 0 1px rgba(212, 149, 74, 0.25), 0 16px 42px rgba(212, 149, 74, 0.09);
}

.qs-default-badge {
    flex-shrink: 0;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    border: 1px solid var(--border-hover);
    background: var(--accent-dim);
    color: var(--accent);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.62rem;
    letter-spacing: 0.05em;
    align-self: center;
}

.qs-badge {
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--muted);
    color: var(--muted-fg);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.02em;
}

/* Quickstart Phases */
.qs-phase {
    max-width: 760px;
    margin: 0 auto 2.5rem;
}
.qs-phase-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.25rem;
}
.qs-phase-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}
.qs-phase-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--accent);
    color: #131210;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}
.qs-phase-sub {
    color: var(--muted-fg);
    font-size: 0.82rem;
    margin: 0.25rem 0 0;
}
.qs-auto-steps {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    margin-top: 1rem;
    font-size: 0.75rem;
    color: var(--muted-fg);
}
.qs-auto-step {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}
.qs-auto-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.6;
}
.qs-auto-arrow {
    color: var(--muted-fg);
    opacity: 0.4;
    font-size: 0.7rem;
}
.qs-agent-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* Try-It Cards */
.qs-try-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}
.qs-try-card {
    position: relative;
    padding: 1.25rem 1rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--muted);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}
.qs-try-card:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
}
.qs-try-icon {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}
.qs-try-label {
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}
.qs-try-prompt {
    font-size: 0.78rem;
    color: var(--muted-fg);
    line-height: 1.5;
    margin-bottom: 0.75rem;
}
.qs-try-copy {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.68rem;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--muted-fg);
    cursor: pointer;
    transition: all 0.15s;
}
.qs-try-copy:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Terminal Card */
.qs-terminal { margin: 0; }
.qs-terminal-bar {
    display: flex; align-items: center; justify-content: space-between; gap: 0.75rem;
    padding: 0.6rem 1.25rem; background: rgba(0,0,0,0.3); border-bottom: 1px solid var(--border);
}
.qs-terminal-meta { display: flex; align-items: center; gap: 0.75rem; min-width: 0; }
.qs-dots { display: flex; gap: 5px; }
.qs-dots span { width: 8px; height: 8px; border-radius: 50%; background: var(--muted-fg); opacity: 0.3; }
.qs-terminal-title { font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem; color: var(--muted-fg); letter-spacing: 0.08em; }
.qs-terminal-body {
    padding: 1.25rem 1.5rem; font-family: 'IBM Plex Mono', monospace; font-size: 0.8rem; line-height: 1.7;
    display: flex; flex-direction: column; gap: 0.2rem; text-align: left;
}
.qs-line {
    color: var(--fg); white-space: normal; overflow-wrap: anywhere; word-break: break-word; text-align: left;
    display: flex; align-items: flex-start; gap: 0.35rem;
}
.qs-line-gap { margin-top: 0.6rem; }
.qs-step {
    width: 1.15rem; height: 1.15rem; border-radius: 6px; flex-shrink: 0;
    border: 1px solid var(--border-hover);
    background: var(--accent-dim); color: var(--accent);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 0.63rem; font-weight: 700; line-height: 1;
    margin-top: 0.15rem;
}
.qs-prompt { color: var(--accent); opacity: 0.7; margin-right: 0.1rem; min-width: 1ch; }
.qs-comment { color: var(--muted-fg); font-style: italic; }
.qs-line-result {
    margin-top: 0.8rem; padding: 0.55rem 0.75rem; border-radius: 8px;
    background: rgba(122, 173, 128, 0.08); border: 1px solid rgba(122, 173, 128, 0.15);
    display: flex; align-items: flex-start; gap: 0.5rem; color: var(--success); font-size: 0.78rem;
}
.qs-success-dot {
    width: 6px; height: 6px; border-radius: 50%; background: var(--success);
    box-shadow: 0 0 8px rgba(122, 173, 128, 0.5); flex-shrink: 0; margin-top: 0.35rem;
}

/* Prompt Card */
.qs-prompt-card { margin: 0; }
.qs-prompt-bar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.6rem 1.25rem; background: rgba(0,0,0,0.3); border-bottom: 1px solid var(--border);
}
.qs-prompt-badge {
    display: flex; align-items: center; gap: 0.4rem;
    font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem; color: var(--muted-fg); letter-spacing: 0.08em;
}
.qs-copy-btn {
    background: var(--muted); border: none; color: var(--muted-fg);
    padding: 0.3rem 0.75rem; border-radius: 6px; cursor: pointer;
    font-size: 0.7rem; font-weight: 600; transition: all 0.2s;
    font-family: 'IBM Plex Mono', monospace;
}
.qs-copy-btn:hover { background: var(--accent); color: #fff; }
body.light .qs-copy-btn:hover { color: #fff; }
.qs-prompt-body {
    padding: 1.25rem 1.5rem; font-size: 0.85rem; line-height: 1.75; color: var(--fg);
    display: flex; flex-direction: column; gap: 0.28rem; text-align: left;
}
.qs-prompt-body p { margin: 0; }

#quickstart .qs-dual { align-items: stretch; }
#quickstart .qs-path { display: flex; flex-direction: column; min-height: 100%; }
#quickstart .qs-terminal,
#quickstart .qs-prompt-card { height: 100%; }
#quickstart .qs-prompt-body p:nth-child(2n+1),
#quickstart .qs-terminal .qs-comment { color: var(--muted-fg); }
html[lang="zh"] #quickstart .qs-path-header h3 { letter-spacing: 0.01em; }
html[lang="zh"] #quickstart .qs-path-sub { letter-spacing: 0.005em; }

.manifesto-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; max-width: 1100px; margin: 0 auto; }
.m-side { padding: 4rem; border-radius: 28px; border: 1px solid var(--border); transition: 0.3s; }
.m-mindos { background: var(--accent-dim); border-color: var(--border-hover); box-shadow: 0 0 40px rgba(212, 149, 74, 0.05); }

.eco-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2.5rem; margin-bottom: 6rem; }

/* Marquee / Infinite Carousel */
.marquee-wrap {
    overflow: hidden; width: 100%; position: relative;
    mask-image: linear-gradient(90deg, transparent 0%, #000 8%, #000 92%, transparent 100%);
    -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 8%, #000 92%, transparent 100%);
    padding: 1rem 0 6rem;
}
.marquee-track {
    display: flex; gap: 1.5rem; width: max-content;
    animation: marquee-scroll 40s linear infinite;
}
.marquee-wrap:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee-scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.eco-item {
    display: flex; flex-direction: column; align-items: center; gap: 0.6rem;
    padding: 1.5rem 1.2rem; border-radius: 12px; min-width: 150px; flex-shrink: 0;
    background: var(--card-bg); border: 1px solid var(--border);
    transition: 0.3s; cursor: default;
}
.eco-item:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 8px 30px rgba(212, 149, 74, 0.1); }
.eco-logo { width: 48px; height: 48px; border-radius: 10px; }
.eco-name { font-family: 'IBM Plex Mono', monospace; font-size: 0.9rem; font-weight: 600; color: var(--fg); }
.eco-desc { font-size: 0.75rem; color: var(--muted-fg); text-align: center; }

/* Code/Command specific styling for Quickstart cards */
.qs-code {
    display: block; background: var(--code-bg); color: var(--code-fg); 
    padding: 1rem; border-radius: 10px; border: 1px solid var(--code-border);
    font-family: 'IBM Plex Mono', monospace; font-size: 0.85rem;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

.animate-up { opacity: 0; transform: translateY(50px); transition: all 1.2s var(--ease-out-expo); }
.animate-up.active { opacity: 1; transform: translateY(0); }

@media (max-width: 1100px) {
    .mind-bridge { grid-template-columns: 1fr; gap: 1.5rem; max-width: 500px; margin-left: auto; margin-right: auto; }
    .bridge-center { flex-direction: row; gap: 1rem; padding: 1rem 1.5rem; min-width: unset; }
    .bridge-flow { display: none; }
    .bridge-hub { width: 60px; height: 60px; }
    .bridge-hub-logo { width: 32px; height: 16px; }
}
@media (max-width: 960px) {
    .feat-grid { grid-template-columns: repeat(2, 1fr); }

    /* Topbar: avoid squeeze/overflow on tablets and large phones */
    .nav-content {
        padding: 0.8rem 1rem;
        gap: 0.8rem;
        flex-wrap: wrap;
    }
    .nav-right {
        width: 100%;
        gap: 0.6rem;
        align-items: stretch;
    }
    .controls {
        border-left: none;
        padding-left: 0;
        justify-content: flex-end;
        gap: 0.65rem;
    }
    .nav-links {
        width: 100%;
        overflow-x: auto;
        white-space: nowrap;
        gap: 1rem;
        padding-bottom: 0.25rem;
        -webkit-overflow-scrolling: touch;
    }
    .nav-links a { flex: 0 0 auto; }
}
@media (max-width: 768px) {
    .container { padding: 0 1rem; }
    .section { padding: 6.5rem 0; }

    .nav-content { padding: 0.7rem 0.9rem; }
    .logo-svg { width: 42px; height: 21px; }
    .logo-text { font-size: 1rem; }
    .control-btn { width: 30px; height: 30px; }
    .btn-primary { padding: 0.5rem 0.9rem; font-size: 0.8rem; }
    .nav-links a { font-size: 0.78rem; }

    .hero { padding-top: 11rem; padding-bottom: 4.5rem; }
    .hero h1 { font-size: 2.8rem; }
    .hero-cta-group { flex-direction: column; max-width: 320px; margin: 0 auto 1.5rem; }
    .cta-primary, .cta-secondary { width: 100%; justify-content: center; }
    .hero-trust-bar { flex-wrap: wrap; gap: 0.7rem 1rem; }

    .manifesto-wrapper { grid-template-columns: 1fr; }
    .bridge-side { border-radius: 16px; }
    .bridge-side-header { padding: 1rem 1.25rem; }
    .mind-file, .agent-slot { padding: 0.6rem 1.25rem; }
    .agent-slot-logo { width: 28px; height: 28px; }
    .pillar-body { grid-template-columns: 1fr; gap: 0.75rem; padding: 1.5rem; }
    .pillar-arrow { flex-direction: row; padding: 0; justify-self: center; }
    .pillar-arrow-line { width: 18px; height: 1px; }
    .pillar-head { padding: 1.25rem 1.5rem; }
    .pillar-col { padding: 0; }
    .pillar-icon-wrap { width: 36px; height: 36px; }
    .pillar-icon-wrap svg { width: 18px; height: 18px; }
    .foundation-banner { flex-direction: column; gap: 1rem; padding: 1.5rem; }
    .feat-grid { grid-template-columns: 1fr; }
    .qs-dual { grid-template-columns: 1fr; }
    .qs-try-grid { grid-template-columns: 1fr; }
    .qs-auto-steps { gap: 0.3rem; font-size: 0.7rem; }
    .qs-path-header { padding: 1.15rem 1.1rem; gap: 0.75rem; }
    .qs-default-badge { align-self: flex-start; margin-top: 0.1rem; }
    .qs-terminal-bar { padding: 0.55rem 1.1rem; }
    .qs-terminal-body, .qs-prompt-body { padding: 1rem 1.1rem; }
    .qs-step { width: 1.05rem; height: 1.05rem; font-size: 0.58rem; }
    /* Compare section mobile */
    .compare-grid { grid-template-columns: 1fr; }
    .compare-col--before { border-right: none; border-bottom: 1px solid var(--border); }
    .compare-col { padding: 1.75rem; }
    .compare-tabs { gap: 0.35rem; }
    .compare-tab { padding: 0.5rem 1rem; font-size: 0.75rem; }
    /* Story section mobile */
    .story-card { padding: 2rem 1.75rem; }
    .story-body p { font-size: 0.95rem; }
    .story-stat { gap: 1.5rem; flex-wrap: wrap; }
    .story-stat-num { font-size: 1.8rem; }
    .story-quote-mark { font-size: 3.5rem; top: 0.5rem; left: 1.5rem; }
    /* Demo flow mobile */
    .df-grid { grid-template-columns: 1fr !important; gap: 1.5rem !important; }
    .df-arrow-gap { display: none !important; }
    .df-arrows-svg { display: none !important; }
    .df-canvas { padding: 1.5rem !important; }
    .df-desktop-layout { flex-direction: column !important; }
    .df-sidebar { flex-direction: row !important; width: 100% !important; border-right: none !important; border-bottom: 1px solid var(--border) !important; overflow-x: auto !important; padding: 0.5rem 0.5rem !important; gap: 0.25rem !important; }
    .df-sidebar-item { padding: 0.3rem 0.6rem !important; font-size: 0.65rem !important; white-space: nowrap !important; }
}

/* ============================
   Demo Flow Section
   ============================ */
.demo-flow-section { padding: 8rem 0; }

.df-canvas {
    max-width: 1360px;
    margin: 0 auto;
    padding: 2.5rem 2rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    position: relative;
    overflow: visible;
}

.df-grid {
    display: grid;
    grid-template-columns: 240px 100px 1fr 100px 280px;
    align-items: start;
    gap: 0;
}

/* Step labels */
.df-step-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}
.df-step-num {
    width: 22px; height: 22px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.7rem; font-weight: 700; color: var(--bg);
    font-family: 'IBM Plex Mono', monospace;
}
.df-step-1 .df-step-num { background: var(--accent); }
.df-step-2 .df-step-num { background: var(--success); }
.df-step-3 .df-step-num { background: #7a9ec4; }
.df-step-text { font-size: 0.85rem; font-weight: 600; color: var(--fg); }
.df-step-sub { font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem; color: var(--muted-fg); margin-left: auto; }

/* === Mobile Frame === */
.df-mobile {
    background: var(--muted);
    border-radius: 20px;
    border: 1.5px solid var(--border);
    overflow: hidden;
    box-shadow: 0 16px 40px rgba(0,0,0,0.3);
}
.df-mobile-status {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.4rem 1rem;
    font-size: 0.65rem; font-family: 'IBM Plex Mono', monospace;
    color: var(--muted-fg); background: var(--bg);
}
.df-mobile-nav {
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.5rem 0.8rem;
    background: var(--bg); border-bottom: 1px solid var(--border);
    font-size: 0.8rem; font-weight: 600;
}
.df-back { color: var(--accent); font-size: 1.1rem; }
.df-mobile-body { padding: 0.6rem; min-height: 180px; }

.df-note {
    background: var(--bg); border-radius: 8px; padding: 0.6rem 0.65rem;
    margin-bottom: 0.4rem; border-left: 3px solid transparent;
}
.df-note--accent { border-left-color: var(--accent); }
.df-note--muted { border-left-color: var(--muted-fg); }
.df-note-time {
    font-size: 0.6rem; font-family: 'IBM Plex Mono', monospace;
    color: var(--muted-fg); margin-bottom: 0.2rem;
}
.df-note-text { font-size: 0.7rem; color: var(--fg); line-height: 1.5; opacity: 0.9; }
.df-tag {
    display: inline-block; margin-top: 0.3rem; padding: 0.1rem 0.4rem;
    border-radius: 3px; font-size: 0.6rem; font-family: 'IBM Plex Mono', monospace;
}
.df-tag--accent { background: var(--accent-dim); color: var(--accent); }
.df-tag--muted { background: rgba(138,130,117,0.1); color: var(--muted-fg); }

.df-mobile-input {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0.5rem 0.6rem;
    background: var(--bg); border-top: 1px solid var(--border);
}
.df-input-placeholder {
    flex: 1; background: var(--muted); border: 1px solid var(--border);
    border-radius: 14px; padding: 0.3rem 0.65rem;
    font-size: 0.65rem; color: var(--muted-fg);
}
.df-send {
    width: 22px; height: 22px; border-radius: 50%; background: var(--accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.7rem; color: var(--bg); font-weight: 700;
}

/* === Arrow gaps (grid columns 2 & 4) === */
.df-arrow-gap {
    align-self: stretch;
}

/* === SVG Arrow Overlay === */
.df-arrows-svg {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 5;
    overflow: visible;
}

/* === Desktop Frame === */
.df-desktop {
    background: var(--muted);
    border-radius: 10px;
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: 0 16px 40px rgba(0,0,0,0.3);
}
.df-desktop-bar {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg); border-bottom: 1px solid var(--border);
}
.df-dot { width: 8px; height: 8px; border-radius: 50%; }
.df-dot--r { background: #e06c6c; }
.df-dot--y { background: var(--accent); }
.df-dot--g { background: var(--success); }
.df-desktop-title {
    margin-left: 0.5rem;
    font-size: 0.65rem; font-family: 'IBM Plex Mono', monospace; color: var(--muted-fg);
}
.df-desktop-layout { display: flex; min-height: 260px; }
.df-sidebar {
    width: 110px; background: var(--bg); opacity: 0.85;
    border-right: 1px solid var(--border);
    padding: 0.5rem 0;
    display: flex; flex-direction: column; gap: 0;
}
.df-sidebar-item {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0.35rem 0.65rem;
    font-size: 0.7rem; color: var(--muted-fg); cursor: default;
}
.df-sidebar-item--active {
    background: var(--accent-dim); color: var(--accent);
    border-right: 2px solid var(--accent);
}
.df-si-icon {
    width: 14px; height: 14px;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 0.55rem; font-family: 'IBM Plex Mono', monospace;
    border-radius: 2px; background: rgba(232,228,220,0.04);
    color: var(--muted-fg); font-weight: 600;
}
.df-sidebar-item--active .df-si-icon { background: rgba(212,149,74,0.15); color: var(--accent); }
.df-main { flex: 1; padding: 0.75rem 1rem; overflow: hidden; }
.df-filepath {
    font-size: 0.6rem; color: var(--muted-fg);
    font-family: 'IBM Plex Mono', monospace; margin-bottom: 0.4rem;
}
.df-updated-badge {
    display: inline-flex; align-items: center; gap: 0.3rem;
    padding: 0.15rem 0.5rem; border-radius: 4px;
    font-size: 0.6rem; font-family: 'IBM Plex Mono', monospace;
    background: var(--accent-dim); color: var(--accent);
    border: 1px solid rgba(212,149,74,0.12);
    margin-bottom: 0.5rem;
}
.df-updated-dot {
    width: 5px; height: 5px; border-radius: 50%;
    background: var(--accent);
    animation: df-pulse 1.5s ease-in-out infinite;
}
@keyframes df-pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}
.df-content-title {
    font-family: 'Lora', Georgia, serif;
    font-size: 0.95rem; font-weight: 500; color: var(--fg);
    margin-bottom: 0.5rem;
}
.df-content-section { margin-bottom: 0.6rem; }
.df-content-section h4 {
    font-size: 0.7rem; font-weight: 600; color: var(--accent);
    margin-bottom: 0.2rem; letter-spacing: 0.02em;
    font-family: 'IBM Plex Sans', sans-serif;
}
.df-content-section ul { list-style: none; padding: 0; }
.df-content-section li {
    font-size: 0.7rem; color: var(--fg); opacity: 0.8; line-height: 1.6;
}
.df-content-section li::before { content: '•'; color: var(--accent); margin-right: 0.35rem; opacity: 0.5; }
.df-badge-row { display: flex; gap: 0.3rem; flex-wrap: wrap; margin-top: 0.2rem; }
.df-file-badge {
    padding: 0.1rem 0.4rem; border-radius: 3px; font-size: 0.6rem;
    font-family: 'IBM Plex Mono', monospace;
    background: rgba(232,228,220,0.04); color: var(--muted-fg);
    border: 1px solid var(--border);
}

/* === Agent Group === */
.df-agent-group {
    border: 1.5px solid rgba(122,158,196,0.2);
    border-radius: 12px;
    padding: 1rem 0.65rem 0.65rem;
    background: rgba(122,158,196,0.03);
    position: relative;
    display: flex; flex-direction: column; gap: 0.5rem;
}
.df-agent-group-label {
    position: absolute; top: -0.55rem; left: 0.75rem;
    padding: 0 0.5rem;
    font-size: 0.6rem; font-family: 'IBM Plex Mono', monospace;
    color: #7a9ec4; background: var(--muted);
    border-radius: 3px; letter-spacing: 0.04em;
}

/* CLI terminal cards */
.df-cli {
    background: var(--bg); border-radius: 7px;
    border: 1px solid var(--border); overflow: hidden;
    box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}
.df-cli-bar {
    display: flex; align-items: center; gap: 0.25rem;
    padding: 0.35rem 0.5rem;
    background: var(--muted); border-bottom: 1px solid var(--border);
}
.df-cli-bar .df-dot { width: 6px; height: 6px; }
.df-cli-name {
    margin-left: 0.3rem;
    font-size: 0.6rem; font-family: 'IBM Plex Mono', monospace; color: var(--muted-fg);
}
.df-cli-body {
    padding: 0.4rem 0.6rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.6rem; line-height: 1.6;
}
.df-cli-line { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.df-prompt { color: var(--accent); opacity: 0.8; }
.df-cli-reading { color: #7a9ec4; }
.df-cli-output { color: var(--muted-fg); }

/* Telegram-style card */
.df-tg {
    background: var(--bg); border-radius: 7px;
    border: 1px solid var(--accent-glow); overflow: hidden;
    box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}
.df-tg-header {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0.35rem 0.6rem;
    background: var(--accent-dim); border-bottom: 1px solid rgba(212,149,74,0.1);
}
.df-tg-avatar {
    width: 18px; height: 18px; border-radius: 50%; background: var(--accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.6rem; font-weight: 700; color: var(--bg);
}
.df-tg-name { font-size: 0.65rem; font-weight: 600; color: var(--accent); }
.df-tg-badge {
    margin-left: auto; font-size: 0.55rem; padding: 0.05rem 0.35rem;
    border-radius: 2px; background: var(--accent); color: var(--bg);
    font-family: 'IBM Plex Mono', monospace; font-weight: 600;
}
.df-tg-body { padding: 0.4rem 0.6rem; }
.df-tg-bubble {
    padding: 0.35rem 0.5rem; border-radius: 6px;
    font-size: 0.65rem; line-height: 1.5; margin-bottom: 0.3rem;
}
.df-tg-user {
    background: var(--accent-dim); color: var(--fg);
    border-radius: 6px 6px 2px 6px; margin-left: 1.5rem;
}
.df-tg-bot {
    background: var(--muted); color: var(--fg); margin-right: 1.5rem;
    border-radius: 6px 6px 6px 2px;
}
.df-tg-hl { color: var(--accent); }

/* Tagline */
.df-tagline {
    text-align: center;
    margin-top: 2.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}
.df-tagline p { font-size: 0.9rem; color: var(--muted-fg); }
.df-tagline span { color: var(--accent); font-weight: 600; }