:root{font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;color:#272831;background:#eff1f7;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 7% 6%,#d9dcf2 0,transparent 35%),radial-gradient(circle at 94% 88%,#f2dfe5 0,transparent 35%),#eff1f7}a{color:inherit}a:focus-visible{outline:3px solid #6b75c9;outline-offset:4px;border-radius:4px}.shell{width:min(1100px,calc(100% - 40px));margin:0 auto}.topbar{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:28px 0}.brand{text-decoration:none;font-size:28px;letter-spacing:.3em;font-weight:500;white-space:nowrap}.topnav{display:flex;align-items:center;gap:22px;font-size:14px;color:#616571}.topnav a{text-decoration:none}.topnav .enter{padding:11px 20px;border-radius:999px;background:#282930;color:white}.hero{padding:128px 0 156px;max-width:none}.hero h1{font-size:clamp(40px,4.4vw,64px);line-height:1.2;letter-spacing:.2em;font-weight:650;white-space:nowrap;margin:0 0 32px}.hero p{color:#626878;font-size:18px;line-height:1.7;letter-spacing:.14em;margin:0}.features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;padding-bottom:100px}.feature{background:#ffffffba;border:1px solid #fff;border-radius:26px;padding:27px;box-shadow:0 20px 55px #37394f0b}.feature .number{color:#7b80a4;font-size:13px}.feature h2{font-size:20px;margin:28px 0 10px}.feature p{font-size:14px;line-height:1.8;color:#686d78;margin:0}.document{background:#ffffffd9;border:1px solid #fff;border-radius:32px;padding:clamp(26px,5vw,64px);margin:38px auto 70px;box-shadow:0 25px 80px #34364a12;max-width:900px}.document .back{color:#6d7280;text-decoration:none;font-size:14px}.document h1{font-size:clamp(32px,4vw,48px);margin:27px 0 12px}.document .intro,.document .updated{color:#737784;line-height:1.8}.document section{border-top:1px solid #e8e9ef;padding-top:24px;margin-top:30px}.document h2{font-size:19px;margin:0 0 12px}.document p,.document li{font-size:15px;line-height:1.9;color:#4d5260}.document ul{padding-left:22px}.document a{color:#3e568a}.footer{border-top:1px solid #ffffffb5;display:flex;justify-content:space-between;gap:20px;padding:26px 0 38px;color:#747987;font-size:13px}.footer nav{display:flex;gap:22px}.footer a{text-decoration:none}@media(max-width:680px){.topbar{align-items:flex-start}.brand{font-size:22px}.topnav{gap:12px;font-size:12px}.topnav .enter{padding:8px 12px}.hero{padding:86px 0 110px}.hero h1{font-size:clamp(36px,8vw,52px);white-space:normal;letter-spacing:.12em}.hero p{font-size:16px}.features{grid-template-columns:1fr;padding-bottom:64px}.footer{flex-direction:column}}
.topbar>.topnav:only-child,.footer>nav:only-child{margin-left:auto}