:root{--ink:#24272b;--muted:#626872;--line:#e7e9ec;--neutral:#f0f1f2;--primary:#f4d8c7;--brown:#703e2d;--mine:#faebe3;color:var(--ink);-webkit-font-smoothing:antialiased;font-family:system-ui,-apple-system,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}body,h1,h2,h3,p,figure{margin:0}body{background:#fff}a{color:inherit;text-decoration:none}a:hover{color:var(--brown)}.wrap{width:min(1120px,100% - 48px);margin-inline:auto}.site-header,.section{border-bottom:1px solid var(--line)}.header-row{justify-content:space-between;align-items:center;gap:20px;min-height:68px;display:flex}.brand,nav,.hero-links{align-items:center;gap:12px;display:flex}.brand{font-size:21px;font-weight:750}.brand span{color:#4e5660;background:#e8ebee;border-radius:9px;place-items:center;width:29px;height:28px;display:grid}nav{color:var(--muted);gap:24px;font-size:14px}.outline,.primary{border-radius:8px;justify-content:center;align-items:center;gap:12px;min-height:42px;padding:8px 15px;font-weight:700;display:inline-flex}.outline{border:1px solid var(--line);color:var(--ink)}.primary{background:var(--primary);color:var(--brown);min-height:46px;padding-inline:18px}.primary:hover{background:#efcbbb}.hero{grid-template-columns:1fr 1fr;align-items:center;gap:64px;padding-block:76px 82px;display:grid}h1{letter-spacing:-.035em;font-size:clamp(35px,4.2vw,57px);font-weight:780;line-height:1.17}.intro{max-width:350px;color:var(--muted);margin-top:24px;font-size:16px;line-height:1.8}.hero-links{flex-wrap:wrap;gap:18px;margin-top:24px;font-size:14px}.secondary{font-weight:700}.chat{border:1px solid var(--line);border-radius:16px;min-width:0;font-size:14px;overflow:hidden}.chat-head{border-bottom:1px solid var(--line);align-items:center;gap:11px;padding:15px 20px;font-weight:700;display:flex}.avatar{color:#525d69;background:#e9edef;border-radius:50%;flex:0 0 29px;place-items:center;width:29px;height:29px;font-size:13px;font-weight:700;display:inline-grid}.chat-messages{gap:12px;padding:16px 20px 22px;display:grid}.chat-messages time{color:var(--muted);justify-self:center;font-size:12px}.chat-row{align-items:center;gap:8px;display:flex}.chat-row p{background:var(--neutral);border-radius:10px;padding:10px 12px}.chat-row.mine{justify-content:flex-end}.chat-row.mine p{background:var(--mine)}.reward{color:#79551e;background:#fffbf1;border:1px solid #f1dfb8;border-radius:9px;justify-self:center;align-items:center;gap:7px;padding:7px 11px;font-size:12px;font-weight:700;display:flex}.reward span{background:#f7df9f;border-radius:50%;place-items:center;width:20px;height:20px;display:grid}.chat-composer{border-top:1px solid var(--line);gap:8px;padding:10px 14px;font-size:12px;display:flex}.chat-composer span{border-radius:7px;padding:8px 10px}.chat-composer span:first-child{background:var(--neutral);color:var(--muted);flex:1}.chat-composer span:last-child{background:var(--primary);color:var(--brown)}main>.section{border-top:1px solid var(--line);border-bottom:0;padding-block:43px 49px;scroll-margin:16px}h2{letter-spacing:-.025em;font-size:clamp(25px,3vw,35px)}h3{margin-bottom:8px;font-size:16px}.steps{grid-template-columns:repeat(3,1fr);margin-top:28px;display:grid}.steps div{padding-right:25px}.steps div+div{border-left:1px solid var(--line);padding-left:25px}.steps p,details p{color:var(--muted);font-size:14px;line-height:1.7}.faq{grid-template-columns:1fr 1.9fr;gap:24px;display:grid}details{border-top:1px solid var(--line)}details:last-child{border-bottom:1px solid var(--line)}summary{cursor:pointer;padding:16px 22px 16px 0;font-size:15px;font-weight:700;list-style:none;position:relative}summary::-webkit-details-marker{display:none}summary:after{content:"+";position:absolute;right:0}details[open] summary:after{content:"−"}details p{margin:0 14px 16px 0}footer.section{border-top:1px solid var(--line);border-bottom:0;padding-block:24px}@media (width<=760px){.hero{grid-template-columns:1fr;gap:32px;padding-block:44px}.faq,.steps{grid-template-columns:1fr}.steps{gap:14px}.steps div+div{border-left:0;border-top:1px solid var(--line);padding:14px 0 0}}@media (width<=460px){.wrap{width:calc(100% - 32px)}.header-row,nav{gap:10px}nav{font-size:12px}.outline{min-height:36px;padding-inline:9px}.chat-messages{padding-inline:12px}}