:root{--bg:#f7f8fc;--surface:#fff;--ink:#111827;--muted:#667085;--line:#e5e7eb;--brand:#6d5dfc;--brand2:#8b7cff;--dark:#0b1020;--success:#0f9f6e;--shadow:0 20px 60px rgba(20,25,50,.08);--radius:24px}html.dark{color-scheme:dark;--bg:#0b1020;--surface:#12182a;--ink:#f3f5fb;--muted:#a5aec0;--line:#283149;--dark:#f3f5fb;--success:#42d39b;--shadow:0 20px 60px rgba(0,0,0,.28)}html.dark .site-header{background:rgba(11,16,32,.9);border-bottom-color:rgba(40,49,73,.85)}html.dark .hero{background:radial-gradient(circle at 75% 25%,rgba(109,93,252,.18),transparent 32%),linear-gradient(180deg,#11172a 0%,var(--bg) 100%)}html.dark .hero-pills span,html.dark .hero-note,html.dark .tool-card,html.dark .tabs,html.dark .dropzone,html.dark .file-summary,html.dark .target-input input,html.dark .target-input select,html.dark .control-row>select,html.dark .number-input,html.dark .download-one,html.dark .result-item,html.dark .mini-card,html.dark .about-card,html.dark .faq-list details,html.dark .contact-note{background:#12182a;border-color:var(--line);color:var(--ink)}html.dark .tabs{background:#0f1525}html.dark .tab.active{background:#20283d;color:var(--ink)}html.dark .dropzone{background:linear-gradient(180deg,#151c30,#101629);border-color:#3a4661}html.dark .dropzone.dragover{background:#1a1835;border-color:var(--brand)}html.dark .hero-note p,html.dark .control-help,html.dark .result-meta,html.dark .mini-card p,html.dark .about-card p,html.dark .contact-note p,html.dark .faq-list details p{color:var(--muted)}html.dark .trust-section{background:#0f1525;border-color:var(--line)}html.dark .note-icon{background:#27223f;color:#9b91ff}html.dark .upload-icon{background:#27223f;color:#9b91ff}html.dark .file-summary{background:#171e31}html.dark .site-footer{background:#070b15}html.dark .primary-btn,html.dark .download-all{background:#f3f5fb;color:#0b1020}html.dark .download-one{background:#171e31}html.dark .nav a:hover{color:var(--ink)}html.dark .legal a,html.dark .faq-list 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