*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f8f9fa;--bg2:#f0f2f5;--surface:#fff;--border:#e0e0e0;--accent:#2563eb;--accent-hover:#1d4ed8;--accent-light:#eff6ff;--text:#1a1a1a;--text2:#6b7280;--text3:#9ca3af;--radius:14px;--radius-sm:8px;--shadow-sm:0 1px 3px rgba(0,0,0,.08);--shadow-md:0 4px 16px rgba(0,0,0,.1);--transition:0.18s ease;--grad:linear-gradient(135deg,#2563eb,#7c3aed)}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{opacity:.8}.container{max-width:900px}.container,.container-wide{margin:0 auto;padding:0 24px}.container-wide{max-width:1200px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:15px;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);white-space:nowrap;text-decoration:none;padding:12px 24px}.btn-primary{background:var(--grad);color:#fff;box-shadow:0 2px 8px rgba(37,99,235,.3)}.btn-primary:hover{opacity:.9;transform:translateY(-1px)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-ghost{background:transparent;color:var(--text2);border:1px solid var(--border)}.btn-ghost:hover{background:var(--bg2);color:var(--text);opacity:1}.btn-success{background:#16a34a;color:#fff}.btn-success:hover{background:#15803d;opacity:1}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}.input{width:100%;background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:15px;padding:12px 16px;outline:none;transition:border-color var(--transition)}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(37,99,235,.1)}.grad-text{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.ad-slot{background:var(--bg2);border:1px dashed var(--border);border-radius:var(--radius-sm);padding:16px;text-align:center;color:var(--text3);font-size:11px;letter-spacing:.06em;text-transform:uppercase;min-height:90px;display:flex;align-items:center;justify-content:center}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));grid-gap:16px;gap:16px}.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);text-decoration:none;color:var(--text);transition:all var(--transition);display:flex;flex-direction:column;gap:10px}.tool-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--accent);opacity:1}.tool-icon{font-size:32px}.tool-name{font-size:16px;font-weight:700;color:var(--text)}.tool-desc{font-size:13px;color:var(--text2);line-height:1.5}.tool-badge{display:inline-block;background:var(--accent-light);color:var(--accent);font-size:11px;font-weight:600;padding:3px 8px;border-radius:20px}@keyframes spin{to{transform:rotate(1turn)}}.spinner{width:18px;height:18px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}@keyframes fadeUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.fade-up{animation:fadeUp .3s ease forwards}.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:48px 24px;text-align:center;cursor:pointer;transition:all var(--transition);background:var(--bg)}.upload-zone.drag-over,.upload-zone:hover{border-color:var(--accent);background:var(--accent-light)}.upload-zone p{color:var(--text2);font-size:14px;margin-top:8px}.progress-bar{height:6px;background:var(--bg2);border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:var(--grad);border-radius:3px;transition:width .3s ease}.result-box{background:#f0fdf4;border:1px solid #86efac;border-radius:var(--radius);padding:20px}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:12px;gap:12px}.stat-box{background:var(--bg2);border-radius:var(--radius-sm);padding:12px;text-align:center}.stat-label{font-size:11px;color:var(--text3);text-transform:uppercase;letter-spacing:.05em}.stat-value{font-size:18px;font-weight:700;color:var(--text);margin-top:2px}@media (max-width:640px){.card{padding:16px}.stats-grid{grid-template-columns:repeat(2,1fr)}.tool-grid{grid-template-columns:1fr 1fr}}