:root{color-scheme:light;--ink:#30261f;--muted:#766c61;--accent:#815923;--paper:#fbf7ef;--line:#dfd1b8}
*{box-sizing:border-box}
body{margin:0;color:var(--ink);background:#efe6d7;font:16px/1.8 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
main{max-width:860px;min-height:100vh;margin:auto;padding:32px 48px;background:var(--paper);border-top:5px solid var(--accent)}
header{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--line)}
.brand{font:700 28px/1.4 "Songti SC",SimSun,serif;letter-spacing:.16em}.label{color:var(--muted);font-size:13px;letter-spacing:.2em}
nav{display:flex;gap:28px;margin-top:20px}a{color:var(--accent);text-underline-offset:5px}a[aria-current=page]{font-weight:700;text-decoration-thickness:2px}a:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.intro{padding:46px 0 28px}.eyebrow{margin:0;color:var(--accent);font-size:13px;letter-spacing:.12em}h1{font:700 clamp(32px,6vw,48px)/1.4 "Songti SC",SimSun,serif;margin:12px 0 20px}.subtitle{font-size:.7em}.lead{color:var(--muted);max-width:640px}
h2{font-size:20px;margin:0 0 12px}.notice{padding:22px 26px;border-left:3px solid var(--accent);background:#f1e8d8}.notice p{margin:0;color:var(--muted)}.steps{padding:32px 0 16px}ol{list-style:none;counter-reset:steps;padding:0;margin:0}li{counter-increment:steps;position:relative;padding:18px 0 18px 48px;border-bottom:1px solid var(--line)}li::before{content:counter(steps,decimal-leading-zero);position:absolute;left:0;top:18px;color:var(--accent);font-size:20px}strong,li span{display:block}li span{color:var(--muted);font-size:14px}footer{margin-top:28px;color:var(--muted);font-size:12px}
@media(max-width:600px){main{padding:24px 22px}.intro{padding-top:32px}.notice{padding:18px}.brand{font-size:25px}nav{gap:20px;font-size:14px}}