.chv4{--h4-navy: #0F2744;--h4-navy-2: #1A3A5C;--h4-navy-divider: #4A6A8A;--h4-ink: #0A1628;--h4-ink-2: #495057;--h4-muted: #6C757D;--h4-muted-2: #ADB5BD;--h4-line: #D1DFE8;--h4-line-2: #E8EFF4;--h4-divider: #D1DFE8;--h4-bg: #FFFFFF;--h4-bg-2: #F4F7FA;--h4-white: #FFFFFF;--h4-accent: #1A3A5C;--h4-accent-solid: #0F2744;--h4-accent-hover: #0A1628;--h4-accent-text: #1A3A5C;--h4-accent-soft: #A8C0D8;--h4-warm: #F4F7FA;--h4-warm-line: #D1DFE8;--h4-green: #2E7D5F;--h4-green-soft: #E8F4EF;--h4-danger: #A63D40;--h4-danger-soft: #FCEAEA;--h4-on-navy: #D1DFE8;--h4-on-navy-muted: #A8C0D8;--h4-avatar-mint: #E8EFF4;--h4-avatar-warm: #E8EFF4;--h4-avatar-cool: #E8EFF4;--h4-status-grey-bg: #F1F3F5;--h4-focus: #4C6FFF;--h4-shadow-card: 0 1px 2px rgba(10, 22, 40, .04);--h4-font-display: "Source Serif 4", Georgia, serif;--h4-font-body: "Source Sans 3", "Segoe UI", sans-serif;--h4-font-mono: "Source Code Pro", ui-monospace, monospace;--h4-container: 1120px;--h4-gutter: 80px;--h4-radius-sm: 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var(--h4-gutter));margin:0 auto;padding:0 var(--h4-gutter)}.chv4-band{padding:72px 0}.chv4-band-light{background:var(--h4-bg)}.chv4-band-tint{background:var(--h4-bg-2)}.chv4-band-navy{background:var(--h4-navy);color:var(--h4-on-navy)}.chv4-band-navy h2,.chv4-band-navy h3{color:var(--h4-white)}.chv4-band-navy .chv4-body{color:var(--h4-on-navy)}.chv4-band-navy .chv4-helper{color:var(--h4-on-navy-muted)}.chv4-two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:64px;align-items:center}.chv4-copy{display:flex;flex-direction:column;gap:16px}.chv4-centered{display:flex;flex-direction:column;align-items:center;gap:40px;text-align:center}.chv4-section-intro{display:flex;flex-direction:column;gap:12px;max-width:640px}.chv4-section-intro-center{align-items:center;text-align:center}.chv4-lead{font-size:18px;line-height:1.5;color:var(--h4-ink-2);max-width:520px}.chv4-lead-on-navy{color:var(--h4-on-navy);font-size:17px}.chv4-body{font-size:17px;line-height:1.5;color:var(--h4-ink-2);max-width:480px}.chv4-helper{font-size:15px;color:var(--h4-muted)}.chv4-cta-stack{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin-top:8px}.chv4-cta-stack-center{align-items:center}.chv4-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:var(--h4-radius-btn);font-weight:600;white-space:nowrap;transition:background-color 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var(--h4-line-2)}.chv4-hero-bg{position:absolute;top:0;right:0;bottom:0;left:0;z-index:-1;width:100%;height:100%;pointer-events:none}.chv4-hero-arc{fill:none;stroke:var(--h4-accent-soft);stroke-width:1.5;vector-effect:non-scaling-stroke}.chv4-hero-arc-1{opacity:.7}.chv4-hero-arc-2{opacity:.45}.chv4-hero-arc-3{opacity:.6}.chv4-hero-arc-4{opacity:.35}.chv4-hero-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:64px;align-items:center}.chv4-hero-copy{display:flex;flex-direction:column;gap:24px}.chv4-hero-visual{display:flex;justify-content:flex-end}.chv4-hero-screen{width:100%;max-width:560px;margin:0;background:var(--h4-white);border:1px solid var(--h4-line);border-radius:var(--h4-radius-card-lg);box-shadow:var(--h4-shadow-card);overflow:hidden}.chv4-hero-screen .chv4-hero-list-meta{font-family:var(--h4-font-mono);font-weight:500}.chv4-hero-screen img{display:block;width:100%;height:auto}.chv4-hero-list{width:100%;max-width:480px;background:var(--h4-white);border:1px 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var(--h4-line-2)}.chv4-hero-list-row:last-child{border-bottom:0}.chv4-hero-list-text{display:flex;flex-direction:column;gap:2px;flex:1;min-width:0}.chv4-hero-list-name{font-size:15px;font-weight:700;color:var(--h4-ink)}.chv4-hero-list-detail{font-size:13px;color:var(--h4-muted)}.chv4-avatar{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;font-size:13px;font-weight:700;color:var(--h4-navy);flex-shrink:0}.chv4-avatar-lg{width:44px;height:44px;font-size:15px}.chv4-avatar-mint{background:var(--h4-avatar-mint)}.chv4-avatar-warm{background:var(--h4-avatar-warm);color:var(--h4-accent-text)}.chv4-avatar-cool{background:var(--h4-avatar-cool)}.chv4-status{font-size:11px;font-weight:700;padding:4px 8px;border-radius:var(--h4-radius-sm);white-space:nowrap}.chv4-status-green{color:var(--h4-green);background:var(--h4-green-soft)}.chv4-status-grey{color:var(--h4-muted);background:var(--h4-status-grey-bg)}.chv4-problem{padding:72px 0}.chv4-problem 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