:root{--bk-bg: #0A0E1A;--bk-bg-elevated: #111729;--bk-surface: #161C2E;--bk-surface-2: #1D2338;--bk-border: rgba(255, 255, 255, .08);--bk-border-strong: rgba(255, 255, 255, .14);--bk-text: #E8ECF5;--bk-text-dim: #A0A8BC;--bk-text-muted: #6B7280;--bk-primary: #4F9EFF;--bk-primary-hover: #3B8BEF;--bk-success: #2DB87A;--bk-warn: #F5A623;--bk-danger: #E53935;--bk-accent: #8B5CF6;--bk-radius-sm: 8px;--bk-radius: 12px;--bk-radius-lg: 20px;--bk-radius-xl: 28px;--bk-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;--bk-shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--bk-shadow: 0 8px 24px rgba(0, 0, 0, .4);--bk-shadow-lg: 0 24px 64px rgba(0, 0, 0, .5)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bk-bg);color:var(--bk-text);font-family:var(--bk-font);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}.bk-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}.bk-nav{position:sticky;top:0;z-index:100;background:#0a0e1ac7;backdrop-filter:saturate(180%) blur(16px);-webkit-backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid var(--bk-border);transition:background .2s ease}.bk-nav__inner{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:1200px;margin:0 auto}.bk-nav__logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.01em}.bk-nav__logo-mark{width:32px;height:32px;border-radius:8px;object-fit:contain;display:block;flex-shrink:0}.bk-nav__links{display:flex;gap:32px;align-items:center}.bk-nav__links a{font-size:14px;color:var(--bk-text-dim);transition:color .15s ease}.bk-nav__links a:hover{color:var(--bk-text)}.bk-nav__right{display:flex;align-items:center;gap:12px}.bk-nav__cta{padding:10px 20px;background:var(--bk-primary);color:#fff;border-radius:999px;font-size:14px;font-weight:600;transition:transform .15s ease,background .15s ease}.bk-nav__cta:hover{background:var(--bk-primary-hover);transform:translateY(-1px)}.bk-nav__mobile-toggle{display:none}.bk-hero{position:relative;padding:96px 0 72px;overflow:hidden}.bk-hero__bg{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;background:radial-gradient(ellipse 70% 50% at 50% 0%,rgba(79,158,255,.15),transparent 60%),radial-gradient(ellipse 40% 40% at 85% 30%,rgba(139,92,246,.1),transparent 70%)}.bk-hero__grid{position:relative;display:grid;grid-template-columns:1.1fr 1fr;gap:64px;align-items:center}.bk-hero__badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;background:#4f9eff1a;border:1px solid rgba(79,158,255,.25);border-radius:999px;font-size:13px;color:var(--bk-primary);margin-bottom:24px}.bk-hero__badge-dot{width:6px;height:6px;border-radius:50%;background:var(--bk-success);box-shadow:0 0 #2db87a80;animation:pulse 2s ease-out infinite}@keyframes pulse{0%{box-shadow:0 0 #2db87a99}to{box-shadow:0 0 0 10px #2db87a00}}.bk-hero__title{font-size:clamp(36px,5vw,64px);font-weight:800;line-height:1.05;letter-spacing:-.03em;margin-bottom:24px}.bk-hero__title-accent{background:linear-gradient(135deg,var(--bk-primary),var(--bk-accent));-webkit-background-clip:text;background-clip:text;color:transparent}.bk-hero__tagline{font-size:17px;color:var(--bk-text-dim);margin-bottom:16px;font-style:italic}.bk-hero__desc{font-size:17px;color:var(--bk-text-dim);max-width:520px;margin-bottom:36px}.bk-hero__actions{display:flex;gap:14px;flex-wrap:wrap}.bk-btn{display:inline-flex;align-items:center;gap:10px;padding:14px 24px;border-radius:14px;font-weight:600;font-size:15px;transition:transform .15s ease,background .15s ease,box-shadow .15s ease;cursor:pointer}.bk-btn--primary{background:var(--bk-primary);color:#fff;box-shadow:0 8px 24px #4f9eff59}.bk-btn--primary:hover{background:var(--bk-primary-hover);transform:translateY(-2px);box-shadow:0 12px 32px #4f9eff73}.bk-btn--ghost{background:transparent;color:var(--bk-text);border:1px solid var(--bk-border-strong)}.bk-btn--ghost:hover{background:var(--bk-surface);border-color:#ffffff40}.bk-hero__stats{display:flex;gap:40px;margin-top:56px;padding-top:32px;border-top:1px solid var(--bk-border)}.bk-stat__value{font-size:28px;font-weight:700;letter-spacing:-.02em;color:var(--bk-text)}.bk-stat__label{font-size:13px;color:var(--bk-text-muted);margin-top:2px}.bk-hero__mockup{position:relative;display:flex;justify-content:center;align-items:center}.bk-mockup-phone{position:relative;width:100%;max-width:340px;aspect-ratio:9 / 19.5;background:var(--bk-surface);border-radius:40px;border:1px solid var(--bk-border-strong);padding:12px;box-shadow:0 0 0 1px #ffffff0a,var(--bk-shadow-lg);overflow:hidden}.bk-mockup-phone__screen{width:100%;height:100%;background:#0f1117;border-radius:28px;overflow:hidden;position:relative}.bk-mockup-phone__placeholder{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--bk-text-muted);font-size:12px;text-align:center;padding:24px;background:linear-gradient(135deg,#4f9eff14,#8b5cf614),#0f1117}.bk-mockup-phone__placeholder-icon{font-size:48px;margin-bottom:12px;opacity:.6}.bk-hero__float{position:absolute;padding:12px 14px;background:var(--bk-surface);border:1px solid var(--bk-border);border-radius:var(--bk-radius);display:flex;align-items:center;gap:10px;box-shadow:var(--bk-shadow);animation:float 4s ease-in-out infinite}.bk-hero__float--1{top:16%;left:-8%;animation-delay:0s}.bk-hero__float--2{bottom:18%;right:-4%;animation-delay:2s}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.bk-hero__float-dot{width:8px;height:8px;border-radius:50%}.bk-hero__float-text{font-size:13px;font-weight:500}.bk-section{padding:96px 0;position:relative}.bk-section--tint{background:linear-gradient(180deg,transparent,rgba(79,158,255,.03) 50%,transparent),var(--bk-bg)}.bk-section__head{text-align:center;max-width:680px;margin:0 auto 64px}.bk-section__eyebrow{display:inline-block;font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.15em;color:var(--bk-primary);margin-bottom:16px}.bk-section__title{font-size:clamp(28px,3.5vw,44px);font-weight:800;letter-spacing:-.02em;line-height:1.15;margin-bottom:16px}.bk-section__subtitle{font-size:17px;color:var(--bk-text-dim)}.bk-features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.bk-feature-card{padding:32px 28px;background:var(--bk-surface);border:1px solid var(--bk-border);border-radius:var(--bk-radius-lg);transition:transform .2s 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