:root{--ink:#18211c;--muted:#68746d;--paper:#f5f2e9;--card:#fffdf7;--line:#dedbd0;--green:#184d3a;--green-soft:#dce9df;--orange:#e96e3a;--yellow:#f3c84b;--danger:#b8403b;--shadow:0 18px 60px #25322a1a}*{box-sizing:border-box}html{background:var(--paper)}body{color:var(--ink);background:radial-gradient(circle at 8% 4%, #f3c84b29, transparent 27rem), radial-gradient(circle at 94% 88%, #184d3a1f, transparent 34rem), var(--paper);margin:0;font-family:Inter,PingFang SC,Microsoft YaHei,system-ui,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer}.landing{min-height:100vh;padding:28px clamp(20px,6vw,88px) 48px;overflow:hidden}.landing-nav{justify-content:space-between;align-items:center;max-width:1240px;margin:auto;display:flex}.brand{letter-spacing:-.03em;align-items:center;gap:10px;font-size:20px;font-weight:800;display:inline-flex}.brand-mark{background:var(--orange);color:#fff;border-radius:11px 11px 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