:root{--brand:#3b82f6;--brand-light:#60a5fa;--brand-dark:#2563eb;--brand-bg:#3b82f614;--brand-border:#3b82f640;--brand-shadow:#3b82f64d;--text:#374151;--text-secondary:#6b7280;--text-heading:#111827;--bg:#fff;--bg-alt:#f9fafb;--bg-card:#fff;--border:#e5e7eb;--border-hover:#3b82f640;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 12px #00000014;--shadow-lg:0 8px 30px #0000001f;--navbar-bg:#ffffffd9;--navbar-mobile-bg:#fff;--icon-blue-bg:#3b82f61a;--icon-purple-bg:#8b5cf61a;--icon-green-bg:#10b9811a;--icon-orange-bg:#f59e0b1a;--icon-pink-bg:#ec48991a;--icon-cyan-bg:#06b6d41a;--icon-blue:#3b82f6;--icon-purple:#8b5cf6;--icon-green:#10b981;--icon-orange:#f59e0b;--icon-pink:#ec4899;--icon-cyan:#06b6d4;--cta-bg:linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);--hero-glow:#3b82f60f;--max-width:1200px;--section-padding:100px 24px;--radius:12px;--radius-sm:8px;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-mono:"SF Mono", "Fira Code", Consolas, monospace;--toggle-icon:"☀️";font:16px/160% var(--font-sans);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}[data-theme=dark]{--brand:#60a5fa;--brand-light:#93c5fd;--brand-dark:#3b82f6;--brand-bg:#60a5fa1f;--brand-border:#60a5fa4d;--brand-shadow:#60a5fa40;--text:#d1d5db;--text-secondary:#9ca3af;--text-heading:#f9fafb;--bg:#0f1117;--bg-alt:#161923;--bg-card:#1c1f2e;--border:#2d3148;--border-hover:#60a5fa59;--shadow-sm:0 1px 2px #0000004d;--shadow-md:0 4px 12px #0006;--shadow-lg:0 8px 30px #00000080;--navbar-bg:#0f1117d9;--navbar-mobile-bg:#0f1117;--icon-blue-bg:#3b82f626;--icon-purple-bg:#8b5cf626;--icon-green-bg:#10b98126;--icon-orange-bg:#f59e0b26;--icon-pink-bg:#ec489926;--icon-cyan-bg:#06b6d426;--icon-blue:#60a5fa;--icon-purple:#a78bfa;--icon-green:#34d399;--icon-orange:#fbbf24;--icon-pink:#f472b6;--icon-cyan:#22d3ee;--cta-bg:linear-gradient(135deg, #0f1729 0%, #0c1a3a 100%);--hero-glow:#60a5fa0f;--toggle-icon:"🌙"}@media (width<=768px){:root{--section-padding:64px 16px}}html.theme-transition,html.theme-transition *,html.theme-transition :before,html.theme-transition :after{transition:background-color .35s,color .25s,border-color .3s,box-shadow .3s!important}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{min-height:100vh}a{color:inherit;text-decoration:none}ul,ol{list-style:none}img{max-width:100%;display:block}button{cursor:pointer;font:inherit;background:0 0;border:none}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.navbar{z-index:100;background:var(--navbar-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:box-shadow .3s,background .35s;position:fixed;top:0;left:0;right:0}.navbar.scrolled{box-shadow:var(--shadow-sm)}.navbar .container{justify-content:space-between;align-items:center;height:64px;display:flex}.navbar-brand{color:var(--text-heading);align-items:center;gap:10px;font-size:20px;font-weight:700;display:flex}.navbar-brand svg{width:32px;height:32px}.navbar-brand span.sub{color:var(--text-secondary);margin-left:2px;font-size:14px;font-weight:400}.navbar-links{align-items:center;gap:32px;display:flex}.navbar-links a{color:var(--text-secondary);font-size:15px;transition:color .2s}.navbar-links a:hover{color:var(--brand)}.navbar-actions{align-items:center;gap:12px;margin-left:auto;display:flex}.theme-toggle{width:36px;height:36px;color:var(--text-secondary);border-radius:50%;justify-content:center;align-items:center;transition:all .25s;display:flex;position:relative;overflow:hidden}.theme-toggle:hover{background:var(--brand-bg);color:var(--brand);transform:rotate(15deg)}.theme-toggle svg{width:20px;height:20px;transition:transform .4s cubic-bezier(.34,1.56,.64,1)}.theme-toggle:active svg{transform:scale(.85)rotate(180deg)}.theme-toggle .icon-sun{display:block}.theme-toggle .icon-moon,[data-theme=dark] .theme-toggle .icon-sun{display:none}[data-theme=dark] .theme-toggle .icon-moon{display:block}.btn{border-radius:var(--radius-sm);justify-content:center;align-items:center;gap:8px;padding:10px 24px;font-size:15px;font-weight:600;transition:all .2s;display:inline-flex}.btn-ghost{border-radius:var(--radius-sm);color:var(--text-secondary);justify-content:center;align-items:center;padding:8px 16px;font-size:14px;font-weight:500;transition:all .25s;display:inline-flex}.btn-ghost:hover{background:var(--brand-bg);color:var(--brand)}.btn-secondary{background:var(--bg);color:var(--text-heading);border:1.5px solid var(--border)}.btn-secondary:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}.mobile-menu-btn{width:36px;height:36px;color:var(--text-secondary);justify-content:center;align-items:center;display:none}@media (width<=768px){.navbar-links{display:none}.mobile-menu-btn{display:flex}.navbar-links.open{background:var(--navbar-mobile-bg);border-bottom:1px solid var(--border);box-shadow:var(--shadow-md);flex-direction:column;gap:16px;padding:16px 24px;display:flex;position:absolute;top:64px;left:0;right:0}}.hero{text-align:center;padding:140px 24px 100px;position:relative;overflow:hidden}.hero:before{content:"";background:radial-gradient(circle, var(--hero-glow) 0%, transparent 70%);pointer-events:none;width:800px;height:800px;position:absolute;top:-200px;left:50%;transform:translate(-50%)}.hero-badge{background:var(--brand-bg);border:1px solid var(--brand-border);color:var(--brand);border-radius:100px;align-items:center;gap:6px;margin-bottom:24px;padding:6px 16px;font-size:14px;font-weight:500;display:inline-flex}.hero h1{color:var(--text-heading);letter-spacing:-1.5px;margin-bottom:20px;font-size:56px;font-weight:800;line-height:1.15}.hero h1 .highlight{background:linear-gradient(135deg, var(--brand), #8b5cf6);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.hero .subtitle{color:var(--text-secondary);max-width:600px;margin:0 auto 40px;font-size:20px;line-height:1.6}.hero-actions{flex-wrap:wrap;justify-content:center;align-items:center;gap:16px;display:flex}.hero-actions .btn{padding:14px 32px;font-size:16px}@media (width<=768px){.hero{padding:110px 16px 64px}.hero h1{letter-spacing:-.5px;font-size:36px}.hero .subtitle{font-size:17px}.hero-actions .btn{padding:12px 24px;font-size:15px}}.features{padding:var(--section-padding);background:var(--bg-alt)}.section-header{text-align:center;margin-bottom:64px}.section-header h2{color:var(--text-heading);letter-spacing:-.5px;margin-bottom:16px;font-size:36px;font-weight:700}.section-header p{color:var(--text-secondary);max-width:560px;margin:0 auto;font-size:18px}.features-grid{max-width:var(--max-width);grid-template-columns:repeat(3,1fr);gap:24px;margin:0 auto;display:grid}.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;transition:all .3s}.feature-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-md);transform:translateY(-4px)}.feature-icon{background:var(--brand-bg);border-radius:12px;justify-content:center;align-items:center;width:48px;height:48px;margin-bottom:20px;display:flex}.feature-card h3{color:var(--text-heading);margin-bottom:10px;font-size:18px;font-weight:600}.feature-card p{color:var(--text-secondary);font-size:15px;line-height:1.6}@media (width<=1024px){.features-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=640px){.features-grid{grid-template-columns:1fr}.section-header h2{font-size:28px}}.platforms,.security{padding:var(--section-padding);background:var(--bg-alt)}.security-grid{max-width:var(--max-width);grid-template-columns:repeat(3,1fr);gap:24px;margin:0 auto;display:grid}.security-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;transition:all .3s}.security-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-md);transform:translateY(-4px)}.security-card h3{color:var(--text-heading);margin-bottom:10px;font-size:18px;font-weight:600}.security-card p{color:var(--text-secondary);font-size:15px;line-height:1.6}@media (width<=1024px){.security-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=640px){.security-grid{grid-template-columns:1fr}}.platform-grid{grid-template-columns:repeat(3,1fr);gap:32px;max-width:960px;margin:0 auto;display:grid}.platform-card{text-align:center;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-card);padding:40px 24px;transition:all .3s}.platform-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-md)}.platform-card .icon{margin-bottom:16px;font-size:40px}.platform-card h3{color:var(--text-heading);margin-bottom:8px;font-size:20px;font-weight:600}.platform-card p{color:var(--text-secondary);font-size:14px;line-height:1.6}.platform-card .tag{background:var(--brand-bg);color:var(--brand);border-radius:100px;margin-top:12px;padding:4px 12px;font-size:12px;font-weight:500;display:inline-block}@media (width<=768px){.platform-grid{grid-template-columns:1fr;gap:16px}}.cta{text-align:center;background:var(--cta-bg);padding:100px 24px}.cta h2{color:var(--text-heading);margin-bottom:16px;font-size:36px;font-weight:700}.cta p{color:var(--text-secondary);margin-bottom:32px;font-size:18px}@media (width<=768px){.cta h2{font-size:28px}.cta p{font-size:16px}}.footer{border-top:1px solid var(--border);background:var(--bg);padding:48px 24px}.footer .container{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.footer-left{color:var(--text-secondary);align-items:center;gap:8px;font-size:14px;display:flex}.footer-left svg{width:20px;height:20px}.footer-links{gap:24px;display:flex}.footer-links a{color:var(--text-secondary);font-size:14px;transition:color .2s}.footer-links a:hover{color:var(--brand)}@media (width<=640px){.footer .container{text-align:center;flex-direction:column}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-in{opacity:0;animation:.6s forwards fadeInUp}.animate-in:first-child{animation-delay:.1s}.animate-in:nth-child(2){animation-delay:.2s}.animate-in:nth-child(3){animation-delay:.3s}.animate-in:nth-child(4){animation-delay:.4s}.animate-in:nth-child(5){animation-delay:.5s}.animate-in:nth-child(6){animation-delay:.6s}.animate-in:nth-child(7){animation-delay:.7s}.animate-in:nth-child(8){animation-delay:.8s}.animate-in:nth-child(9){animation-delay:.9s}.animate-in:nth-child(10){animation-delay:1s}