*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:#f7fafc;color:#333;line-height:1.5}#app{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}@media(min-width:1024px){#app{max-width:1200px;padding:0 24px}}@media(min-width:1440px){#app{max-width:1400px}}button,input,select{font-family:inherit}.navbar[data-v-ebd77113]{display:flex;justify-content:space-between;align-items:center;padding:1rem 0;border-bottom:1px solid #eee}.logo-text[data-v-ebd77113]{font-size:1.5rem;font-weight:700;color:#3182ce}.lang[data-v-ebd77113]{padding:.4rem .6rem;border:1px solid #ddd;border-radius:6px;outline:none}.tab-bar[data-v-9fd98f1f]{display:flex;gap:.5rem;margin-bottom:1.5rem;border-bottom:1px solid #eee}.tab[data-v-9fd98f1f]{padding:.7rem 1.2rem;border:none;background:none;font-size:1rem;cursor:pointer}.tab.active[data-v-9fd98f1f]{color:#3182ce;font-weight:600;border-bottom:2px solid #3182ce}.upload-area[data-v-37bef7b4]{border:2px dashed #ddd;border-radius:10px;padding:2rem;text-align:center;cursor:pointer;min-height:140px;display:flex;align-items:center;justify-content:center}.empty[data-v-37bef7b4]{color:#666;font-size:1rem}.file-list[data-v-37bef7b4]{width:100%}.file-item[data-v-37bef7b4]{padding:.5rem 0;color:#333}.format-group[data-v-b9dd8c22]{display:flex;gap:10px;align-items:center}.format-item[data-v-b9dd8c22]{padding:10px 20px;border:1px solid #ccc;border-radius:6px;cursor:pointer;-webkit-user-select:none;user-select:none;font-size:14px}.format-item.active[data-v-b9dd8c22]{background-color:#3182ce;color:#fff;border-color:#3182ce}.format-item[data-v-b9dd8c22]:hover{border-color:#999}.app-container[data-v-76891656]{width:100%;margin:0 auto;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.hero[data-v-76891656]{text-align:center;margin:2.5rem 0}.hero h1[data-v-76891656]{font-size:2.6rem;color:#2d3748;margin:0 0 1rem}.desc[data-v-76891656]{color:#4a5568;line-height:1.6;max-width:900px;margin:0 auto 1.5rem;font-size:1.1rem}.features[data-v-76891656]{text-align:left;color:#4a5568;max-width:800px;margin:0 auto;padding-left:1.5rem;font-size:1.05rem}.features li[data-v-76891656]{margin:.5rem 0}.tool-panel[data-v-76891656]{background:#fff;border-radius:12px;box-shadow:0 4px 12px #00000014;padding:2rem;margin-bottom:2rem}.action-bar[data-v-76891656]{display:flex;align-items:center;gap:1rem;margin-top:1.5rem;flex-wrap:wrap}.btn-convert[data-v-76891656]{padding:.75rem 2.5rem;background:#3182ce;color:#fff;border:none;border-radius:6px;font-size:1rem;cursor:pointer;transition:background .2s}.btn-convert[data-v-76891656]:disabled{background:#cbd5e0;cursor:not-allowed}.btn-convert[data-v-76891656]:hover:not(:disabled){background:#2b6cb0}