:root{color-scheme:light;--ink:#172426;--muted:#617174;--accent:#0a756d;--line:#d9e8e4;font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#f5fbf9}*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-underline-offset:4px}a:focus-visible,summary:focus-visible{outline:2px solid #0f9f91;outline-offset:5px}.skip{position:absolute;top:-80px;padding:12px;background:white}.skip:focus{top:8px;z-index:2}.header{border-bottom:1px solid var(--line);background:#fbfefd}.header-inner{max-width:1120px;margin:auto;min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:16px 24px}.brand{text-decoration:none;color:var(--ink);font-size:17px;font-weight:750;white-space:nowrap}.brand span{display:block;font-size:10px;letter-spacing:.15em;margin-top:5px}.header nav{display:flex;gap:22px;flex-wrap:wrap;font-size:14px}.header nav a{text-decoration:none;color:var(--muted)}.header nav a[aria-current=page]{color:var(--accent);font-weight:650}.main{max-width:1060px;margin:auto;padding:32px 24px 64px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:54px}.breadcrumb a{text-decoration:none}.hero{max-width:820px;margin-bottom:64px}.eyebrow{font-size:13px;letter-spacing:.06em;color:var(--accent);font-weight:650}h1{font-size:clamp(32px,4.7vw,54px);line-height:1.2;letter-spacing:-.03em;margin:18px 0 24px}p{line-height:1.9}.intro{font-size:18px;color:var(--muted);margin-bottom:28px}.action{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;border-radius:10px;padding:13px 22px;font-size:15px;font-weight:600}.action:hover{background:#075d57}.section{margin-top:56px}h2{font-size:26px;font-weight:650;margin:0 0 24px}.features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px}.feature{border-top:1px solid var(--line);padding-top:22px}h3{font-size:18px;margin:0 0 12px}.feature p,.steps p,details p{font-size:15px;color:var(--muted);margin:0}.steps{padding:0;list-style:none;counter-reset:step}.steps li{display:grid;grid-template-columns:44px 1fr;gap:18px;padding:24px 0;border-top:1px solid var(--line)}.steps li:before{counter-increment:step;content:counter(step,decimal-leading-zero);font-size:22px;color:var(--accent);font-variant-numeric:tabular-nums}.faq details{border-top:1px solid var(--line);padding:20px 0}.faq summary{cursor:pointer;line-height:1.6;font-weight:600}.faq details p{margin:16px 0 0;max-width:850px}.related{display:flex;gap:14px 28px;flex-wrap:wrap}.related a{font-size:15px}.footer{max-width:1060px;margin:auto;padding:28px 24px;border-top:1px solid var(--line);color:var(--muted);font-size:12px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px}.footer nav{display:flex;gap:18px}.footer a{color:inherit}.notice{margin-top:40px;font-size:13px;color:var(--muted)}@media(max-width:720px){.header-inner{align-items:flex-start;flex-direction:column;gap:20px;padding:20px}.header nav{gap:12px 20px;font-size:13px}.main{padding:24px 20px 48px}.breadcrumb{margin-bottom:32px}.hero{margin-bottom:44px}.intro{font-size:16px}.features{grid-template-columns:1fr;gap:24px}.section{margin-top:40px}h2{font-size:23px}.footer{padding:24px 20px}.steps li{grid-template-columns:30px 1fr;gap:14px}}