:root{--bg:#f5f5f1;--paper:#fff;--ink:#242b29;--muted:#8b918c;--line:#e6e9e2;--green:#36644b;--mint:#eef4ec}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:14px}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #91b299;outline-offset:3px}button{transition:background .2s,transform .2s}button:hover{filter:brightness(.96)}header{height:82px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 5%;background:#fafaf7}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-weight:750;font-size:22px;text-decoration:none}.brand-icon{display:grid;place-items:center;background:var(--green);color:white;width:36px;height:36px;border-radius:11px;font-size:23px}.brand-en{font-size:10px;letter-spacing:2px;font-weight:600;margin-left:5px;color:#747e73}.header-note{font-size:12px;color:#7d877d;letter-spacing:1px}.demo-tag{font-size:10px;letter-spacing:1px;border:1px solid #d8dfd3;border-radius:6px;padding:7px 10px;color:#66755b}main{max-width:1260px;margin:auto;padding:43px 32px 0}.intro{display:flex;align-items:center;justify-content:space-between;margin-bottom:31px}.eyebrow{font-size:10px;letter-spacing:2px;color:var(--green);font-weight:700}.eyebrow span{color:#a0a99a;margin-left:12px}h1{font-size:32px;font-weight:650;letter-spacing:1px;margin:12px 0}h1 span{color:#739366}.intro p{color:#8a9088;margin:0;font-size:13px}.outline{padding:11px 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