:root{color-scheme:light;--paper:#f4f1e9;--ink:#173a35;--muted:#64736b;--accent:#a45d32;--line:#d5d9cd}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px 'Microsoft YaHei','PingFang SC',sans-serif}header{padding:25px 5vw;display:flex;align-items:center;gap:30px;border-bottom:1px solid var(--line)}a{color:inherit}.brand{text-decoration:none;font:700 28px 'Songti SC',SimSun,serif;letter-spacing:3px}.brand small{font:10px Georgia,serif;letter-spacing:2px}.badge{margin-left:auto;font-size:12px;border:1px solid var(--ink);padding:6px 12px;border-radius:20px}main{max-width:1280px;margin:auto;display:grid;grid-template-columns:1.4fr 1fr;min-height:76vh}.intro{padding:65px 55px 55px 35px}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--accent)}h1{font:normal clamp(36px,4.6vw,62px)/1.35 'Songti SC',SimSun,serif;margin:30px 0}p{line-height:1.8}.intro>p:not(.eyebrow){max-width:440px;color:var(--muted)}.chain{list-style:none;padding:0;display:flex;margin:45px 0;gap:12px;flex-wrap:wrap;font-size:13px}.chain li{border-top:2px solid var(--line);padding-top:13px;flex:1;min-width:80px}.chain li:first-child{border-color:var(--accent)}aside{border-left:3px solid var(--accent);padding:0 18px;font-size:13px}aside p{color:var(--muted)}.access{background:#fffdf7;border-left:1px solid var(--line);padding:65px 42px}h2{font:normal 30px 'Songti SC',SimSun,serif}.muted,.footnote{color:var(--muted);font-size:13px}form{margin-top:28px}label{display:block;font-size:13px;margin-bottom:20px}input{display:block;width:100%;padding:14px;margin-top:9px;background:transparent;border:1px solid #a8b4a9;border-radius:3px;font:inherit}button{width:100%;padding:14px;border:0;background:var(--ink);color:white;font:inherit;cursor:pointer;border-radius:3px}button:disabled{opacity:.5;cursor:wait}.secondary{background:transparent;color:var(--ink);border:1px solid var(--line);margin-top:15px}:focus-visible{outline:3px solid #c48a44;outline-offset:3px}#message{font-size:13px;color:var(--accent);min-height:25px}pre{white-space:pre-wrap;overflow-wrap:anywhere;font:13px/1.8 'Microsoft YaHei',sans-serif}.footnote{margin-top:35px}footer{border-top:1px solid var(--line);padding:23px 5vw;font-size:12px;display:flex;justify-content:space-between;color:var(--muted)}[hidden]{display:none!important}@media(max-width:750px){header>span:not(.badge){display:none}main{grid-template-columns:1fr}.intro{padding:30px 24px}.access{padding:30px 24px;border-left:0;border-top:1px solid var(--line)}h1{margin:20px 0}.chain{margin:25px 0}footer{gap:20px;flex-wrap:wrap}}
/* P0 · 激活绑定体验（扫码 / 一点即绑 / 复制 / 官方商店） */
.qr-wrap{margin:18px 0}
.qr-wrap img{display:block;background:#fff;border:1px solid var(--line);border-radius:3px;padding:8px}
.link-btn{display:inline-block;width:auto;padding:12px 18px;margin:6px 0;border:1px solid var(--line);border-radius:3px;color:var(--ink);text-decoration:none;background:transparent;font:inherit;cursor:pointer}
.link-btn.as-button{width:auto}
.store-list{margin:8px 0 0;padding-left:20px;font-size:13px}
.store-list a{color:var(--accent)}
details{margin:14px 0;font-size:13px}
summary{cursor:pointer;color:var(--muted)}