:root{--bg:#f5f3ed;--surface:#fff;--ink:#171a22;--muted:#69707d;--line:#dedfdc;--blue:#4f67e8;--blue-soft:#e9edff;--green:#2f9b68;--navy:#17213d;--warm:#ede7dc;--shadow:0 24px 70px rgba(23,27,39,.10)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif}button,textarea{font:inherit}button{cursor:pointer}.topbar{height:78px;padding:0 36px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(80,84,92,.14);background:rgba(245,243,237,.9);backdrop-filter:blur(14px);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none}.brand-mark{width:42px;height:42px;border-radius:13px;background:var(--navy);color:white;display:grid;place-items:center;font-size:22px;font-weight:800}.brand>span:last-child{display:grid;gap:1px}.brand small{font-size:11px;color:var(--muted);letter-spacing:.08em}.top-actions,.result-actions{display:flex;gap:10px}.ghost,.dark,.primary{border:0;border-radius:13px;padding:12px 18px;font-weight:700}.ghost{background:transparent;border:1px solid var(--line);color:var(--ink)}.dark{background:var(--ink);color:white}.primary{background:var(--blue);color:white;box-shadow:0 10px 24px rgba(79,103,232,.22)}main{width:min(1220px,calc(100% - 40px));margin:auto}.intro{min-height:calc(100vh - 78px);display:grid;grid-template-columns:1.12fr .88fr;gap:80px;align-items:center;padding:70px 0}.eyebrow{font-size:12px;letter-spacing:.16em;font-weight:800;color:var(--blue)}.intro h1,.result-head h1{font-size:clamp(48px,6vw,82px);line-height:1.02;letter-spacing:-.055em;margin:18px 0 24px}.intro h1 span{color:var(--blue)}.intro-copy>p{font-size:18px;line-height:1.8;color:var(--muted);max-width:730px}.idea-box{margin-top:38px;background:var(--surface);border:1px solid 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p{font-size:13px;line-height:1.55;margin:8px 0 0}.progress-sidebar nav{display:grid;gap:6px;margin:22px 0}.step-item{display:grid;grid-template-columns:30px 1fr;align-items:center;gap:8px;padding:10px;border-radius:11px;color:var(--muted);font-size:13px}.step-item i{font-style:normal;width:26px;height:26px;border-radius:8px;background:#f0f1f2;display:grid;place-items:center;font-size:11px}.step-item.active{background:#f0f3ff;color:var(--blue);font-weight:800}.step-item.complete i{background:#e6f5ed;color:var(--green)}.sidebar-note{margin-top:auto;padding:15px;border-radius:15px;background:#f7f2e8}.sidebar-note strong{font-size:12px}.sidebar-note p{font-size:12px;color:var(--muted);line-height:1.55;margin:7px 0 0}.conversation{padding:34px;display:flex;flex-direction:column}.conversation-head{display:flex;align-items:flex-start;justify-content:space-between}.conversation-head span{font-size:11px;color:var(--blue);font-weight:800;letter-spacing:.12em}.conversation-head 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