:root{--bg:#faf9f6;--surface:#ffffff;--surface-2:#f3f1ea;--ink:#1a1a1a;--ink-2:#57534c;--muted:#8a857b;--border:#e8e4d9;--border-strong:#d7d2c4;--accent:#0f766e;--accent-ink:#0b5a54;--accent-weak:#e6f2f0;--danger:#a23c1b;--danger-weak:#f6e9e3;--r-lg:14px;--r:10px;--r-sm:7px;--sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--shadow-sm:0 1px 2px rgba(26,26,26,0.05);--shadow:0 6px 24px rgba(26,26,26,0.07);--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color-scheme:light}[data-theme=dark]{color-scheme:dark;--bg:#15140f;--surface:#1d1b16;--surface-2:#272420;--ink:#f4f1ea;--ink-2:#c5bfb2;--muted:#938d80;--border:#322e26;--border-strong:#443f35;--accent:#19b8a8;--accent-ink:#6ee7d6;--accent-weak:#14302d;--danger:#e8835f;--danger-weak:#3a241b;--shadow-sm:0 1px 2px rgba(0,0,0,0.4);--shadow:0 6px 24px rgba(0,0,0,0.55)}[data-theme=dark] .btn-primary{color:var(--bg)}[data-theme=dark] .btn-primary:hover:not(:disabled){background:#ffffff;color:var(--bg)}[data-theme=dark] .lockbtn.on{color:var(--bg)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--ink);font-family:var(--font-sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.page-main{flex:1 0 auto}a{color:var(--accent-ink)}.shell{max-width:1040px;margin:0 auto;padding:var(--sp-6) var(--sp-4) var(--sp-7)}.banner,.dropzone,.note,.progress,.result{max-width:720px;margin-left:auto;margin-right:auto}.masthead{display:flex;align-items:baseline;gap:var(--sp-3);margin-bottom:var(--sp-6)}.wordmark{font-size:22px;font-weight:680;letter-spacing:-.02em;margin:0}.wordmark .dot{color:var(--accent)}.navbar{position:-webkit-sticky;position:sticky;top:0;z-index:30;background:var(--surface);border-bottom:1px solid var(--border)}.navbar-inner{width:100%;max-width:none;margin:0;padding:0 var(--sp-5);height:60px;justify-content:space-between}.navbar-inner,.navbar-start{display:flex;align-items:center;gap:var(--sp-5)}.navbar-start{min-width:0;flex:1 1}.brand{text-decoration:none;color:var(--ink)}.brand,.navlinks{display:flex;align-items:center}.navlinks{gap:2px}.navlink{text-decoration:none;color:var(--ink-2);font-size:14px;font-weight:540;padding:7px 12px;border-radius:var(--r-sm);transition:color .12s ease,background .12s ease}.navlink:hover{color:var(--ink);background:var(--surface-2)}.navlink.active{color:var(--accent-ink);background:var(--accent-weak)}.navauth{margin-left:auto;display:flex;align-items:center}.themetoggle{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;flex:none;background:none;border:1px solid var(--border);border-radius:var(--r-sm);color:var(--ink-2);cursor:pointer;margin-right:var(--sp-1);transition:color .12s,border-color .12s,background 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10px;border-radius:var(--r-sm)}.navmobile-link.active,.navmobile-link:hover{background:var(--surface-2);color:var(--accent-ink)}.navmobile-auth{display:flex;flex-direction:column;align-items:stretch;gap:var(--sp-2);margin-top:var(--sp-3);padding-top:var(--sp-3);border-top:1px solid var(--border)}.navmobile-auth .btn{width:100%}.navmobile-auth .nav-login{width:100%;text-align:center;border:1px solid var(--border-strong);border-radius:var(--r-sm);padding:11px}}.hero{text-align:center;max-width:760px;margin:var(--sp-6) auto var(--sp-5)}.hero-title{font-size:38px;font-weight:720;letter-spacing:-.03em;line-height:1.1;margin:0 0 var(--sp-3)}.hero-sub{color:var(--ink-2);font-size:16.5px;line-height:1.6;margin:0 auto;max-width:600px}.hero-trust{list-style:none;margin:var(--sp-4) 0 0;padding:0;display:flex;flex-wrap:wrap;justify-content:center;gap:var(--sp-2) var(--sp-3)}.trust-chip{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:540;color:var(--ink-2)}.trust-chip 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var(--accent);outline-offset:1px}.uiselect{position:relative;display:inline-block}.uiselect.block{display:block;width:100%}.uiselect-btn{display:flex;align-items:center;justify-content:space-between;gap:8px;width:100%;min-width:132px;height:40px;font:inherit;font-size:14px;color:var(--ink);background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--r-sm);padding:0 12px;cursor:pointer;transition:border-color .12s ease}.uiselect-btn:hover{border-color:var(--accent)}.uiselect-btn:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.uiselect-btn:disabled{opacity:.5;cursor:not-allowed}.uiselect-chev{color:var(--ink-2);flex:none}.uiselect-panel{position:absolute;z-index:40;top:calc(100% + 6px);left:0;min-width:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow);padding:6px;max-height:320px;overflow:auto}.uiselect-group+.uiselect-group{margin-top:4px;border-top:1px solid 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.aspect-thumb{border-color:var(--ink)}.aspect-frame{max-width:100%;max-height:100%;overflow:hidden;border-radius:3px;background:var(--border);box-shadow:var(--shadow-sm)}.aspect-frame img{width:100%;height:100%;object-fit:cover;display:block}.aspect-name{font-size:12px;font-weight:560;color:var(--ink);line-height:1.2}.aspect-dim{font-size:11px;color:var(--ink-2)}.editor{display:grid;grid-template-columns:minmax(0,1fr) 380px;grid-gap:var(--sp-5);gap:var(--sp-5);align-items:start;margin-top:var(--sp-4)}.editor-stage{position:-webkit-sticky;position:sticky;top:var(--sp-4);display:grid;grid-gap:var(--sp-3);gap:var(--sp-3)}.editor-stage 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