:root{color:#243f39;font-synthesis:none;background:#f5f4ed;font-family:system-ui,PingFang SC,sans-serif}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer;color:#254e42;background:#fff;border:1px solid #c8d4c7;border-radius:14px;min-height:48px;padding:12px 20px}button:disabled{opacity:.55;cursor:wait}button:focus-visible,a:focus-visible{outline-offset:3px;outline:3px solid #c48323}@supports not selector(:focus-visible){button:focus,a:focus{outline-offset:3px;outline:3px solid #c48323}}input,select,textarea{background:#fff;border:1px solid #a8b9ac;border-radius:12px;width:100%;margin:8px 0 18px;padding:14px}label{font-weight:600;display:block}h1{letter-spacing:-1px;font-size:clamp(28px,4vw,46px);line-height:1.3}h2{font-size:24px}.pilot-shell{max-width:1240px;min-height:100dvh;margin:auto;padding:28px 40px}.pilot-header{border-bottom:1px solid #dce3d8;flex-wrap:wrap;align-items:center;gap:20px;margin-bottom:44px;padding-bottom:24px;display:flex}.pilot-brand{color:#284a3d;font-size:26px;font-weight:800;text-decoration:none}.pilot-brand span{margin-left:12px;font-size:16px;font-weight:500}.pilot-badge{background:#e4eddb;border-radius:20px;margin-left:auto;padding:8px 12px;font-size:13px}.pilot-login{grid-template-columns:1.15fr 1fr;align-items:center;gap:60px;min-height:60vh;display:grid}.pilot-card{background:#fff;border:1px solid #e0e5da;border-radius:24px;margin:20px 0;padding:30px;box-shadow:0 10px 35px #254b3510}.pilot-primary{color:#fff;background:#315e4d;border-color:#315e4d}.pilot-eyebrow{color:#687d55;font-size:16px;font-weight:600}.pilot-muted,footer{color:#69756b;font-size:14px;line-height:1.7}p{line-height:1.8}footer{margin-top:36px}form button{width:100%}[role=alert]{color:#9d342a}.pilot-row{flex-wrap:wrap;gap:12px;display:flex}.pilot-grid{grid-template-columns:1fr 1fr;gap:24px;display:grid}@media (width<=760px){.pilot-shell{padding:20px}.pilot-login,.pilot-grid{grid-template-columns:1fr;gap:12px}.pilot-header{margin-bottom:22px}.pilot-card{padding:22px}.pilot-badge{margin-left:0}}.pilot-study{grid-template-columns:340px minmax(0,1fr);align-items:start;gap:30px;display:grid}.pilot-character{text-align:center;position:sticky;top:20px}.pilot-character .feifei-stage{min-height:280px;margin:0}.pilot-character .character-puppet{height:320px}.pilot-prompt{white-space:pre-wrap;overflow-wrap:break-word;overflow-wrap:anywhere;font-size:24px}.pilot-expression{background:#f0f5e8;border-radius:12px;padding:16px;font-size:28px}.pilot-study .pilot-row button{margin-bottom:10px}.pilot-character .feifei-stage__caption{color:#68765f}@media (width<=900px){.pilot-study{grid-template-columns:1fr}.pilot-character{grid-template-columns:180px 1fr;align-items:center;display:grid;position:static}.pilot-character .character-puppet{height:180px}.pilot-character .feifei-stage{min-height:180px}.pilot-character .pilot-muted{grid-column:2}.pilot-prompt{font-size:22px}}.pilot-shell>section>h1{margin:8px 0 24px;font-size:32px}.pilot-header{margin-bottom:24px}.pilot-shell>section>.pilot-eyebrow{margin-bottom:4px}.pilot-checkbox{vertical-align:middle;width:24px;height:24px;margin:8px}.pilot-study{grid-template-columns:minmax(360px,.95fr) minmax(0,1.15fr);gap:28px;margin-top:20px}.pilot-character{display:block}.pilot-character>p{margin:14px 12px 0}@media (width<=900px){.pilot-study{grid-template-columns:1fr}.pilot-character{display:block;position:static}.pilot-character .pilot-muted{display:none}}@supports not (aspect-ratio:1/1){.pilot-header>*+:not(.pilot-badge){margin-left:20px}.pilot-row>*+*{margin-left:12px}}