:root{color-scheme:light;--ink:#17213b;--muted:#60708f;--line:rgba(23,33,59,0.12);--panel:rgba(255,255,255,0.78);--blue:#246bfe;--green:#12a474;--yellow:#ffc84a;}*{box-sizing:border-box;}html{scroll-behavior:smooth;}body{margin:0;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:radial-gradient(circle at 10% 12%,rgba(255,200,74,0.36),transparent 24rem),radial-gradient(circle at 88% 8%,rgba(36,107,254,0.18),transparent 24rem),linear-gradient(180deg,#f8fbff 0%,#eef6ff 48%,#fff8e8 100%);}a{color:inherit;text-decoration:none;}.site-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:18px clamp(18px,5vw,72px);background:rgba(248,251,255,0.82);border-bottom:1px solid var(--line);backdrop-filter:blur(16px);}.brand,.nav{display:flex;align-items:center;}.brand{gap:10px;font-weight:800;font-size:20px;}.brand-mark{display:block;width:54px;height:54px;object-fit:contain;flex:0 0 auto;}.nav{gap:20px;color:var(--muted);font-weight:650;}.nav a:hover{color:var(--blue);}.hero,.section,.footer{width:min(1120px,calc(100% - 36px));margin:0 auto;}.hero{min-height:620px;display:grid;grid-template-columns:1.1fr 0.9fr;align-items:center;gap:clamp(32px,6vw,86px);}.eyebrow{margin:0 0 12px;color:var(--green);font-weight:800;text-transform:uppercase;letter-spacing:0;}h1,h2,h3,p{letter-spacing:0;}h1{margin:0;max-width:720px;font-size:clamp(38px,7vw,72px);line-height:1.04;}h2{margin:0;font-size:clamp(28px,4vw,46px);line-height:1.12;}h3{margin:0 0 12px;font-size:22px;}.lead{max-width:640px;margin:24px 0 0;color:var(--muted);font-size:20px;line-height:1.75;}.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}.primary-link,.secondary-link,.feedback-form button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border:0;border-radius:8px;font:inherit;font-weight:800;cursor:pointer;}.primary-link,.feedback-form button{color:#fff;background:linear-gradient(135deg,var(--blue),#6c54ff);box-shadow:0 16px 34px rgba(36,107,254,0.24);}.secondary-link{background:#fff;border:1px solid var(--line);}.hero-card{position:relative;min-height:420px;padding:38px;overflow:hidden;background:var(--panel);border:1px solid rgba(255,255,255,0.9);border-radius:24px;box-shadow:0 24px 80px rgba(39,62,112,0.16);}.orbit{position:absolute;inset:34px;border:2px dashed rgba(36,107,254,0.22);border-radius:50%;}.orbit::before,.orbit::after{content:"";position:absolute;border-radius:50%;}.orbit::before{width:96px;height:96px;left:18%;top:12%;background:var(--yellow);}.orbit::after{width:132px;height:132px;right:10%;bottom:8%;background:linear-gradient(135deg,#9be7ff,#7d7cff);}.stat.big{position:relative;margin-top:72px;font-size:116px;font-weight:900;line-height:1;}.stat-label{position:relative;color:var(--muted);font-size:22px;font-weight:800;}.mini-grid{position:relative;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:54px;}.mini-grid span,.feature{background:rgba(255,255,255,0.82);border:1px solid var(--line);border-radius:8px;}.mini-grid span{padding:14px;font-weight:750;}.section{padding:72px 0;}.section-head{max-width:720px;margin-bottom:28px;}.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}.feature{min-height:220px;padding:24px;}.feature p,.split p,.feedback-section p{color:var(--muted);line-height:1.7;}.split{display:grid;grid-template-columns:0.8fr 1.2fr;gap:52px;align-items:start;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}.feedback-section{padding-bottom:96px;}.feedback-form{display:grid;gap:18px;max-width:760px;padding:28px;background:var(--panel);border:1px solid var(--line);border-radius:16px;}.feedback-form label{display:grid;gap:8px;color:var(--ink);font-weight:800;}.feedback-form input,.feedback-form textarea{width:100%;padding:14px 16px;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:8px;font:inherit;line-height:1.5;}.feedback-form textarea{resize:vertical;}.form-status{min-height:24px;margin:0;color:var(--green);font-weight:750;}.form-status.error{color:#d94343;}.footer{display:flex;justify-content:space-between;gap:16px;padding:28px 0 44px;color:var(--muted);border-top:1px solid var(--line);}@media (max-width:820px){.site-header,.footer{align-items:flex-start;flex-direction:column;}.nav{width:100%;justify-content:space-between;gap:10px;font-size:14px;}.hero{min-height:auto;grid-template-columns:1fr;padding:54px 0 36px;}.hero-card{min-height:320px;padding:26px;}.feature-grid,.split{grid-template-columns:1fr;}.feature{min-height:auto;}}