:root{--bg:#f6f7fb;--panel:#ffffff;--panel2:#eef1f7;--text:#16181d;--muted:#5b6472;--line:#e3e7ef;--violet:#7c3aed;--violet-soft:#ede9fe;--orange:#f97316;--orange-soft:#fff1e6;--green:#16a34a;--green-soft:#e6f6ec;--red:#dc2626;--red-soft:#fdecec;--shadow:0 12px 32px rgba(30,27,75,.10);--shadow-sm:0 4px 14px rgba(30,27,75,.08);--header-bg:rgba(255,255,255,.92);--input-bg:#ffffff;--link:#6d28d9}[data-theme=dark]{--bg:#0f0f14;--panel:#18181f;--panel2:#1f1f2a;--text:#f2f2f5;--muted:#a7a7b5;--line:#2a2a38;--violet:#8b5cf6;--violet-soft:#2a2140;--orange:#f97316;--orange-soft:#3a2415;--green:#22c55e;--green-soft:#14291a;--red:#ef4444;--red-soft:#2a1214;--shadow:0 10px 40px rgba(0,0,0,.35);--shadow-sm:0 4px 14px rgba(0,0,0,.30);--header-bg:rgba(15,15,20,.92);--input-bg:#0f0f14;--link:#c4b5fd}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe 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17px;border-radius:13px;border:1.5px solid var(--line);background:var(--input-bg);color:var(--text);font-size:16px;outline:none}.toolform input:focus{border-color:var(--violet);box-shadow:0 0 0 4px var(--violet-soft)}.btn{border:0;border-radius:13px;padding:14px 22px;font-size:16px;font-weight:700;cursor:pointer}.btn.primary{background:linear-gradient(135deg,var(--violet),var(--orange));color:#fff;box-shadow:0 8px 20px rgba(124,58,237,.35)}.btn.primary:hover{filter:brightness(1.08)}.btn.secondary{background:var(--panel2);color:var(--text);border:1px solid var(--line)}.btn.download{display:inline-block;background:var(--green);color:#fff;margin:6px 8px 0 0}.btn:disabled{opacity:.6;cursor:wait}.hint,.small{font-size:14px;color:var(--muted)}.affil{font-size:13px;color:var(--muted)}.status{color:var(--violet);font-weight:600}.alert{border-radius:13px;padding:14px 16px;margin-top:14px;text-align:left}.alert.error{background:var(--red-soft);border:1px solid var(--red);color:var(--text)}.alert p{margin:6px 0}.result{display:flex;gap:16px;margin-top:16px;text-align:left;flex-wrap:wrap}.thumb{width:180px;max-width:100%;border-radius:13px;object-fit:cover}.result-title{font-weight:700;margin:0 0 4px}.trust-row{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:22px 0 6px}.trust-item{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:8px 15px;font-size:14px;font-weight:600;color:var(--muted)}.section{padding:30px 0;border-top:1px solid var(--line);margin-top:30px}.section h2{font-size:26px;margin:0 0 16px;letter-spacing:-.3px}.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:14px;gap:14px}.step-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow-sm)}.step-num{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--violet),var(--orange));color:#fff;font-weight:800;margin-bottom:10px}.features li,.steps li{margin:8px 0}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:10px;gap:10px;list-style:none;padding:0;margin:0}.feature-item{background:var(--panel);border:1px solid var(--line);border-radius:13px;padding:13px 16px;display:flex;gap:10px;align-items:flex-start}.feature-check{color:#fff;background:var(--green);border-radius:50%;width:24px;height:24px;min-width:24px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:800}.faq{background:var(--panel);border:1px solid var(--line);border-radius:13px;padding:13px 17px;margin:10px 0}.faq 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0}.disclaimer,.footer-grid a{color:var(--muted)}.disclaimer{font-size:14px}.post-list{list-style:none;padding:0}.post-list li{margin:14px 0}.post-list a{font-weight:700}.article-meta{color:var(--muted);font-size:14px}.lang-switch{margin:14px 0}.lang-switch a{margin-right:14px}@media(max-width:900px){.header-inner{gap:10px;padding:10px 14px}.logo{font-size:20px}.logo-mark{width:30px;height:30px}.main-nav{flex:1 1 100%;order:3;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;padding-bottom:2px}.main-nav::-webkit-scrollbar{display:none}.main-nav a{white-space:nowrap;padding:7px 10px;font-size:14px}.theme-toggle{margin-left:auto;padding:7px 12px;font-size:13px}}@media(max-width:640px){body{font-size:16px}.wrap{padding:0 14px}.toolform{flex-direction:column}.toolform input{width:100%}.hero{padding:26px 0 10px}.toolbox{padding:16px}.thumb{width:100%}.section h2{font-size:22px}}