:root{--bg: #F9F8F6;--bg-soft: #F9F8F6;--bg-2: rgba(28, 28, 28, .05);--card: #F9F8F6;--text: #1C1C1C;--text-dim: rgba(28, 28, 28, .6);--text-tertiary: rgba(28, 28, 28, .4);--border: rgba(28, 28, 28, .1);--border-strong: rgba(28, 28, 28, .4);--primary: #1C1C1C;--primary-2: #1C1C1C;--accent: #1C1C1C;--success: #1C1C1C;--warning: #1C1C1C;--danger: #1C1C1C;--radius: 0;--shadow: none;--font-serif: Georgia, "Times New Roman", "Songti SC", "SimSun", "Noto Serif SC", serif;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif}*{margin:0;padding:0;box-sizing:border-box}html,body{font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.7;min-height:100vh}#app{min-height:100vh;display:flex;flex-direction:column}.app-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:flex-end;padding:18px 48px;background:#f9f8f6e6;backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}.privacy-badge{font-family:var(--font-sans);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-dim)}.app-main{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:56px 48px 120px}.page-title{text-align:center;padding:8px 0 44px}.page-title h1{font-family:var(--font-serif);font-size:38px;line-height:1.2;letter-spacing:-.03em;font-weight:400;color:var(--text);margin-bottom:14px}.page-title .page-subtitle{font-family:var(--font-sans);font-size:13px;letter-spacing:.06em;text-transform:uppercase;font-style:italic;color:var(--text-tertiary);line-height:1.8}.upload-zone{border:1px dashed var(--border-strong);background:transparent;padding:80px 24px;text-align:center;cursor:pointer;transition:border-color .2s ease,background-color .2s ease}.upload-zone:hover,.upload-zone.dragover{border-color:var(--text);background:var(--bg-2)}.upload-icon{font-size:40px;margin-bottom:24px;opacity:.55}.upload-title{font-family:var(--font-serif);font-size:24px;letter-spacing:-.02em;margin-bottom:12px}.upload-sub{font-size:14px;color:var(--text-dim);line-height:1.8}.upload-hint{margin-top:28px;font-family:var(--font-sans);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-tertiary)}.notice{margin-top:32px;border:1px solid var(--border);padding:22px 28px;font-size:13px;line-height:2;color:var(--text-dim);background:transparent}.notice strong{color:var(--text);font-weight:600}.notice-label{display:block;font-family:var(--font-sans);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--text-tertiary);margin-bottom:6px}.settings-panel{margin-top:44px;border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:30px 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:40px;background:transparent}.setting-group label{display:block;font-family:var(--font-sans);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--text-tertiary);margin-bottom:14px;font-weight:400}.setting-control{display:flex;gap:10px;align-items:center}.setting-control span{color:var(--text-dim);font-size:12px}input[type=number],select{background:transparent;color:var(--text);border:none;border-bottom:1px solid var(--border-strong);border-radius:0;padding:13px 2px;font-family:var(--font-sans);font-size:14px;width:100%;outline:none;transition:border-color .2s ease}input[type=number]:focus,select:focus{border-bottom-color:var(--text)}input[type=number]::-webkit-inner-spin-button{opacity:.4}.seg{display:flex;border-bottom:1px solid var(--border);gap:0}.seg button{flex:1;border:none;border-bottom:2px solid 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ease}.compare-wrap{position:relative;width:100%;overflow:hidden;background:#1c1c1c0a;user-select:none}.compare-img{width:100%;display:block;pointer-events:none}.compare-after{position:absolute;inset:0;overflow:hidden;pointer-events:none}.compare-after img{max-width:none;height:100%;width:auto;position:absolute;left:0;top:0}.compare-divider{position:absolute;top:0;bottom:0;width:1px;background:var(--text);cursor:ew-resize;z-index:5}.compare-divider:after{content:"⇄";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--text);color:var(--bg);width:28px;height:28px;display:grid;place-items:center;font-size:13px;line-height:1}.compare-tag{position:absolute;top:10px;left:10px;font-family:var(--font-sans);font-size:10px;letter-spacing:.15em;text-transform:uppercase;padding:5px 12px;background:var(--bg);color:var(--text);border:1px solid var(--border);z-index:6}.compare-tag.after{left:auto;right:10px}:focus-visible{outline:1px solid 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