*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f5f5f7;--surface: #ffffff;--border: #e5e5e7;--text: #1d1d1f;--text-secondary: #6e6e73;--primary: #0071e3;--primary-hover: #0060c0;--radius: 12px;--radius-sm: 8px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);--shadow-lg: 0 4px 16px rgba(0,0,0,.1);--font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif}[data-theme=dark]{--bg: #1a1a1c;--surface: #2c2c2e;--border: #3a3a3c;--text: #f5f5f7;--text-secondary: #98989d;--primary: #0a84ff;--primary-hover: #409cff;--shadow: 0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.2);--shadow-lg: 0 4px 16px rgba(0,0,0,.4)}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh}.nav{position:sticky;top:0;z-index:100;background:var(--surface);border-bottom:1px solid var(--border)}.nav-inner{max-width:1080px;margin:0 auto;padding:12px 24px;display:flex;justify-content:space-between;align-items:center}.nav-logo{font-size:20px;font-weight:700;letter-spacing:-.5px;color:var(--text)}.nav-right{display:flex;align-items:center;gap:12px}.nav-link{font-size:14px;font-weight:500;color:var(--text-secondary);text-decoration:none;padding:6px 14px;border-radius:var(--radius-sm);transition:background .15s,color .15s}.nav-link:hover{background:var(--bg);color:var(--text)}.theme-toggle{background:none;border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;padding:4px 8px;font-size:16px;line-height:1;transition:background .15s}.theme-toggle:hover{background:var(--bg)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 16px;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:500;font-family:var(--font);cursor:pointer;text-decoration:none;transition:background .15s,transform .1s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}.btn-ghost:hover{background:var(--surface);color:var(--text)}.btn-lg{padding:12px 28px;font-size:16px;border-radius:var(--radius)}.hero{padding:96px 24px 80px;text-align:center;background-image:linear-gradient(135deg,rgba(0,113,227,.04) 0%,transparent 50%,rgba(168,85,247,.04) 100%)}[data-theme=dark] .hero{background-image:linear-gradient(135deg,rgba(10,132,255,.06) 0%,transparent 50%,rgba(168,85,247,.06) 100%)}.hero-inner{max-width:680px;margin:0 auto}.hero-tagline{font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:1.5px;color:var(--primary);margin-bottom:16px}.hero-title{font-size:56px;font-weight:700;letter-spacing:-1.5px;line-height:1.1;margin-bottom:20px}.hero-subtitle{font-size:19px;color:var(--text-secondary);line-height:1.6;margin-bottom:36px}.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.features{padding:80px 24px}.features-inner{max-width:900px;margin:0 auto}.section-title{font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--primary);margin-bottom:24px}.app-grid{display:grid;grid-template-columns:1fr;gap:16px}.app-card{display:flex;align-items:flex-start;gap:20px;padding:28px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);text-decoration:none;color:var(--text);transition:box-shadow .15s,transform .15s}.app-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.app-card-icon{font-size:36px;line-height:1;flex-shrink:0}.app-card-name{font-size:18px;font-weight:600;margin-bottom:4px}.app-card-desc{font-size:15px;color:var(--text-secondary);line-height:1.5}.platform-features{padding-top:0}.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.feature-card{padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}.feature-card-icon{font-size:28px;display:block;margin-bottom:12px}.feature-card-title{font-size:16px;font-weight:600;margin-bottom:4px}.feature-card-desc{font-size:14px;color:var(--text-secondary);line-height:1.5}.footer{border-top:1px solid var(--border);padding:24px}.footer-inner{max-width:1080px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.footer-brand{font-size:15px;font-weight:600;color:var(--text)}.footer-copy{font-size:13px;color:var(--text-secondary)}@media (max-width: 768px){.hero{padding:64px 24px 56px}.hero-title{font-size:38px}.hero-subtitle{font-size:17px}.feature-grid{grid-template-columns:1fr}.nav-right{gap:8px}}