:root,:root[data-theme=dark]{color-scheme:dark;--rtc-bg: #0b1220;--rtc-bg-alt: #0e1626;--rtc-color-surface: #131f35;--rtc-color-surface-alt: #18253e;--rtc-color-surface-2: #1e2e4a;--rtc-color-primary: #2a8cff;--rtc-color-primary-bright: #5aa9ff;--rtc-color-primary-dark: #1567d3;--rtc-color-cyan: #38e0c8;--rtc-color-accent: #7c5cff;--rtc-color-text: #e7eef9;--rtc-color-text-muted: #9fb0c9;--rtc-color-text-dim: #64748f;--rtc-color-border: rgba(255, 255, 255, .09);--rtc-color-border-strong: rgba(255, 255, 255, .17);--rtc-color-success: #2ed47a;--rtc-color-warning: #f5a524;--rtc-color-danger: #ff5c5c;--rtc-glass: rgba(19, 31, 53, .72);--rtc-glass-border: rgba(255, 255, 255, .1);--rtc-hover-tint: rgba(255, 255, 255, .05);--rtc-shadow-sm: 0 4px 14px rgba(0, 0, 0, .35);--rtc-shadow-md: 0 12px 34px rgba(0, 0, 0, .45);--rtc-shadow-lg: 0 26px 64px rgba(0, 0, 0, .55);--rtc-glow-primary: 0 0 0 1px rgba(42, 140, 255, .4), 0 0 26px rgba(42, 140, 255, .32);--rtc-on-brand: #05131f}:root[data-theme=light]{color-scheme:light;--rtc-bg: #f5f8fd;--rtc-bg-alt: #eaf0f9;--rtc-color-surface: #ffffff;--rtc-color-surface-alt: #f4f7fc;--rtc-color-surface-2: #ffffff;--rtc-color-primary: #1567d3;--rtc-color-primary-bright: #2a8cff;--rtc-color-primary-dark: #0e4fa6;--rtc-color-cyan: #0fb9a1;--rtc-color-accent: #6a45ff;--rtc-color-text: #0e1626;--rtc-color-text-muted: #47586f;--rtc-color-text-dim: #76889f;--rtc-color-border: rgba(12, 26, 52, .1);--rtc-color-border-strong: rgba(12, 26, 52, .18);--rtc-color-success: #12a05a;--rtc-color-warning: #c9770a;--rtc-color-danger: #dc3b3b;--rtc-glass: rgba(255, 255, 255, .78);--rtc-glass-border: rgba(12, 26, 52, .08);--rtc-hover-tint: rgba(12, 26, 52, .04);--rtc-shadow-sm: 0 4px 14px rgba(18, 40, 80, .08);--rtc-shadow-md: 0 12px 30px rgba(18, 40, 80, .1);--rtc-shadow-lg: 0 24px 56px rgba(18, 40, 80, .14);--rtc-glow-primary: 0 0 0 1px rgba(21, 103, 211, .28), 0 10px 30px rgba(21, 103, 211, .16);--rtc-on-brand: #ffffff}:root{--rtc-font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;--rtc-font-display: "Space Grotesk", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--rtc-font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--rtc-radius-sm: 8px;--rtc-radius-md: 14px;--rtc-radius-lg: 22px;--rtc-radius-pill: 999px;--rtc-gradient-brand: linear-gradient(135deg, #2a8cff 0%, #38e0c8 100%);--rtc-gradient-accent: linear-gradient(135deg, #7c5cff 0%, #2a8cff 100%);--rtc-container: 1200px;--rtc-section-y: 88px}*{box-sizing:border-box}html,body{margin:0;padding:0;min-height:100%}body{font-family:var(--rtc-font-sans);font-size:15px;line-height:1.65;color:var(--rtc-color-text);background-color:var(--rtc-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .3s ease,color .3s ease}h1,h2,h3,h4{font-family:var(--rtc-font-display);font-weight:700;letter-spacing:-.01em;line-height:1.12;margin:0}p{margin:0}a{color:var(--rtc-color-primary);text-decoration:none;transition:color .15s ease}a:hover{color:var(--rtc-color-primary-bright)}code,pre{font-family:var(--rtc-font-mono)}::selection{background:#2a8cff47}.rtc-container{width:100%;max-width:var(--rtc-container);margin:0 auto;padding:0 24px}.rtc-section{padding:var(--rtc-section-y) 0}.rtc-section--alt{background:var(--rtc-bg-alt);border-top:1px solid var(--rtc-color-border);border-bottom:1px solid var(--rtc-color-border)}.rtc-eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--rtc-font-mono);font-size:12.5px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--rtc-color-primary)}.rtc-eyebrow:before{content:"";width:18px;height:1px;background:var(--rtc-color-primary);opacity:.7}.rtc-section-head{max-width:720px;margin:0 auto 56px;text-align:center}.rtc-section-title{font-size:clamp(28px,4vw,40px);margin-top:14px}.rtc-section-sub{margin-top:16px;font-size:17px;color:var(--rtc-color-text-muted)}.rtc-card{background:var(--rtc-color-surface);border:1px solid var(--rtc-color-border);border-radius:var(--rtc-radius-lg);box-shadow:var(--rtc-shadow-sm)}.rtc-chip{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:var(--rtc-radius-pill);background:var(--rtc-hover-tint);border:1px solid var(--rtc-color-border);font-family:var(--rtc-font-mono);font-size:12px;color:var(--rtc-color-text-muted)}.rtc-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border:1px solid transparent;border-radius:var(--rtc-radius-pill);font-family:var(--rtc-font-display);font-size:14.5px;font-weight:600;letter-spacing:.01em;cursor:pointer;white-space:nowrap;transition:transform .12s ease,box-shadow .15s ease,background .15s ease,border-color .15s ease,color .15s ease}.rtc-btn:hover{transform:translateY(-1px);text-decoration:none}.rtc-btn:active{transform:translateY(0)}.rtc-btn--primary{background:var(--rtc-gradient-brand);color:var(--rtc-on-brand);box-shadow:0 8px 22px #2a8cff52}.rtc-btn--primary:hover{color:var(--rtc-on-brand);box-shadow:0 12px 30px #2a8cff75}.rtc-btn--ghost{background:var(--rtc-hover-tint);color:var(--rtc-color-text);border-color:var(--rtc-color-border-strong)}.rtc-btn--ghost:hover{color:var(--rtc-color-text);border-color:var(--rtc-color-primary);background:#2a8cff14}.rtc-btn--sm{height:38px;padding:0 16px;font-size:13.5px}.rtc-btn--lg{height:52px;padding:0 28px;font-size:16px}