:root{color-scheme:light;--primary:#395AE6;--bg:#F3F5FA;--surface:#fff;--ink:#17212B;--muted:#667085;--border:#E0E5ED;--success:#217A55;--danger:#B43D3D;font:15px/1.7 "Segoe UI","Microsoft YaHei UI","PingFang SC",sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html{scroll-behavior:smooth;scrollbar-color:var(--muted) var(--bg);scrollbar-width:thin}body{margin:0}a{color:inherit;text-decoration:none}a:focus-visible{outline:3px solid var(--primary);outline-offset:5px}a:hover{text-decoration:underline}.wrap{max-width:1120px;margin:auto;padding-inline:28px}header{height:110px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;gap:12px;align-items:center;font-size:21px;font-weight:700;line-height:1.4}.brand small{display:block;font-size:11px;color:var(--muted);font-weight:400;letter-spacing:.08em}.quiet{font-size:14px;color:var(--muted)}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:60px;align-items:center;padding:65px 0 88px}.eyebrow{font:600 11px/1.6 Consolas,monospace;letter-spacing:.12em;color:var(--primary)}h1{font-size:clamp(40px,5.5vw,62px);line-height:1.2;letter-spacing:-.035em;margin:22px 0}h2{font-size:27px;line-height:1.4;margin:13px 0 20px}h3{font-size:17px;margin:0 0 8px}.lead{font-size:18px;color:var(--muted);line-height:1.85}.actions{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0 16px}.primary,.secondary{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 20px;border-radius:12px;font-size:14px;font-weight:600;gap:25px}.primary{background:var(--primary);color:white}.primary:hover{filter:brightness(.95)}.secondary{background:var(--surface);border:1px solid var(--border)}.meta{font-size:12px;color:var(--muted);margin:6px 0}.preview{padding:28px;border:1px solid var(--border);border-radius:24px;background:var(--surface);box-shadow:0 18px 55px #17212b08;transform:rotate(1deg)}.preview-head{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);padding-bottom:22px;border-bottom:1px solid var(--border);margin-bottom:24px}.preview-head i{width:8px;height:8px;border-radius:50%;background:var(--success)}.preview label{font-weight:600;font-size:14px}.mock-input{padding:18px;margin:10px 0 20px;border:1px solid var(--border);border-radius:12px;min-height:115px;color:var(--muted);font-family:Consolas,monospace}.mock-input span{font-family:inherit;font-size:12px;opacity:.7}.choices{display:flex;gap:12px}.choices span{border:1px solid var(--border);padding:15px;flex:1;border-radius:12px;font-size:14px}.choices .selected{border-color:var(--primary);color:var(--primary);background:var(--bg)}.ready{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:28px;font-size:11px;color:var(--success)}.ready b{background:var(--primary);color:#fff;padding:10px 16px;border-radius:8px;white-space:nowrap}.preview>p{font-size:11px;color:var(--muted);text-align:center;margin:18px 0 0}.start{padding:55px 0;border-top:1px solid var(--border);display:grid;grid-template-columns:1fr 1.3fr;gap:60px}ol{padding:0;margin:0;list-style:none}li{display:flex;gap:20px;margin:0 0 27px}li>b{color:var(--primary);font:28px/1.4 Consolas,monospace}li p{margin:0;color:var(--muted);font-size:14px}.web{display:flex;align-items:center;gap:45px;justify-content:space-between;background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:34px 40px}.web p,.notes p{font-size:14px;color:var(--muted);max-width:690px}.web>a{flex-shrink:0}.notes{padding:60px 0}.notes h2{font-size:21px}.notes p{max-width:850px}.links{display:flex;gap:25px;flex-wrap:wrap;color:var(--primary);font-size:13px;margin-top:24px}footer{border-top:1px solid var(--border);padding-block:25px;color:var(--muted);display:flex;justify-content:space-between;gap:15px;font-size:12px}@media(max-width:760px){.wrap{padding-inline:22px}header{height:90px}.brand{font-size:18px}.hero{grid-template-columns:1fr;padding:35px 0 50px;gap:34px}.preview{transform:none}.start{grid-template-columns:1fr;gap:20px;padding:40px 0}.web{flex-direction:column;align-items:flex-start;padding:28px;gap:10px}footer{flex-direction:column}.quiet{font-size:12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
