:root{--paper:#F7F3EC;--paper2:#FBF8F2;--card:#fff;--ink:#23211C;--ink2:#4A4438;--muted:#6B6459;--faint:#9A9183;--line:#E8E0D2;--clay:#B5713C;--clay-d:#8A5A23;--clay-soft:#FBF4E9;--blue:#4E6E92;--sans:"Noto Sans SC",system-ui,sans-serif;--serif:"Noto Serif SC",serif;--mono:"JetBrains Mono",monospace}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:880px;margin:0 auto;padding:0 24px}
.bar{position:sticky;top:0;background:rgba(247,243,236,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:10}
.bar .wrap{display:flex;align-items:center;gap:14px;height:60px}
.bar a.back{font-size:14px;color:var(--ink2)}
.bar a.back:hover{color:var(--clay)}
.bar .t{font-weight:500;font-size:15px}
.bar .demo{margin-left:auto;font-size:12px;color:var(--clay-d);background:var(--clay-soft);border:1px solid #EAD7BC;padding:4px 12px;border-radius:20px}
.hd{text-align:center;padding:54px 0 10px}
.hd .k{font-size:13px;letter-spacing:2px;color:var(--clay-d);font-weight:500;margin-bottom:12px}
.hd h1{font-family:var(--serif);font-weight:600;font-size:32px;margin-bottom:12px}
.hd p{font-size:16px;color:var(--muted);max-width:580px;margin:0 auto}
.step{padding:34px 0;border-top:1px solid var(--line)}
.step:first-of-type{border-top:0}
.shead{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.sn{width:34px;height:34px;border-radius:50%;background:var(--ink);color:var(--paper);font-family:var(--mono);display:flex;align-items:center;justify-content:center;font-size:15px}
.shead h2{font-family:var(--serif);font-weight:600;font-size:22px}
.shead .sub{font-size:13px;color:var(--faint);margin-left:auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 24px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.block{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 22px}
.block .ic{font-size:22px;color:var(--clay);margin-bottom:10px}
.block h3{font-size:16px;font-weight:600;margin-bottom:8px}
.block h4{font-size:14px;font-weight:700;margin-bottom:10px}
.block p{font-size:13.5px;color:var(--muted)}
.list{list-style:none;display:flex;flex-direction:column;gap:9px}
.list li{font-size:14px;color:var(--ink2);padding-left:22px;position:relative}
.list li:before{content:"";position:absolute;left:0;top:8px;width:9px;height:9px;border-radius:3px;background:var(--clay)}
.list li b{color:var(--ink);font-weight:500}
.tags{display:flex;gap:8px;flex-wrap:wrap}
.tg{font-size:13px;padding:5px 12px;border-radius:8px}
.tg.good{background:#E1F5EE;color:#0F6E56}
.tg.bad{background:#FCEBEB;color:#A32D2D}
.evalbar{background:var(--ink);color:#F2EADF;border-radius:14px;padding:20px 24px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.evalbar .badge{font-family:var(--mono);font-size:20px;color:#E0A861;font-weight:500;white-space:nowrap}
.evalbar p{font-size:14px;color:#D8CFC0}
.cta{text-align:center;padding:44px 0 60px;border-top:1px solid var(--line);margin-top:14px}
.cta h3{font-family:var(--serif);font-weight:600;font-size:24px;margin-bottom:10px}
.cta p{color:var(--muted);margin-bottom:22px}
.btn{display:inline-flex;align-items:center;gap:7px;font-size:15px;font-weight:500;padding:13px 26px;border-radius:10px;background:var(--clay);color:#fff;transition:.22s;border:1px solid transparent}
.btn:hover{background:var(--clay-d)}
.btn.ghost{background:transparent;color:var(--ink);border-color:rgba(35,33,28,.22)}
.btn.ghost:hover{background:rgba(35,33,28,.04)}
.note{font-size:12.5px;color:var(--faint);margin-top:16px}
.chat{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.chat .ctop{display:flex;align-items:center;gap:9px;padding:13px 18px;border-bottom:1px solid var(--line);background:var(--paper2)}
.chat .ctop .av{width:28px;height:28px;border-radius:8px;background:var(--ink);color:var(--paper);display:flex;align-items:center;justify-content:center;font-size:14px}
.chat .ctop .nm{font-weight:500;font-size:14px}
.chat .cbody{padding:18px;display:flex;flex-direction:column;gap:13px}
.bu{align-self:flex-end;max-width:82%;background:var(--ink);color:var(--paper);padding:10px 15px;border-radius:13px 13px 4px 13px;font-size:14px}
.ba{align-self:flex-start;max-width:92%;background:var(--paper2);border:1px solid var(--line);padding:13px 16px;border-radius:13px 13px 13px 4px;font-size:14px;color:var(--ink2)}
.ba .rtag{display:inline-block;font-size:12px;font-weight:500;color:#A32D2D;background:#FCEBEB;border:1px solid #F0C8C8;padding:2px 10px;border-radius:14px;margin-bottom:8px}
.ba .gtag{display:inline-block;font-size:12px;font-weight:500;color:#0F6E56;background:#E1F5EE;padding:2px 10px;border-radius:14px;margin-bottom:8px}
.typing{display:inline-flex;gap:5px;align-items:center;align-self:flex-start;background:var(--paper2);border:1px solid var(--line);padding:13px 16px;border-radius:14px 14px 14px 4px;width:fit-content}
.typing .dot{width:7px;height:7px;border-radius:50%;background:var(--clay);animation:tblink 1.2s infinite}
.typing .dot:nth-child(2){animation-delay:.2s}
.typing .dot:nth-child(3){animation-delay:.4s}
@keyframes tblink{0%,60%,100%{opacity:.25;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}
@media(max-width:760px){.grid2,.grid3{grid-template-columns:1fr}}