:root{--bg: #f4f3f0;--surface: #ffffff;--surface-2: #ebe9e4;--surface-3: #e2e0da;--ink: #1f2b4d;--muted: #5d6578;--border: #dcdad3;--accent: #f7941d;--accent-ink: #1f2b4d;--accent-strong: #c2570a;--accent-soft: #fdeedb;--danger: #c72a21;--danger-soft: #fdeceb;--danger-ink: #9b1c14;--success: #1a7f4b;--success-soft: #e7f4ec;--warning: #8a5a00;--warning-soft: #fbf0dd;--font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-read: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", "Songti SC", "STSong", "SimSun", serif;--font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;--fs-xs: 13px;--fs-sm: 13px;--fs-base: 14px;--fs-title: 18px;--fs-heading: 26px;--fs-brand: 18px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-pill: 999px;--sp-1: 4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-5: 24px;--sp-6: 32px;--sp-7: 48px;--ease-out: cubic-bezier(.22, 1, .36, 1);--ease-in-out: cubic-bezier(.76, 0, .24, 1);--ease-soft: cubic-bezier(.33, 1, .68, 1);--t-press: .14s;--t-hover: .18s;--t-ui: .24s;--shadow-dialog: 0 24px 70px rgba(15, 20, 40, .28), 0 2px 8px rgba(15, 20, 40, .08);--shadow-toast: 0 12px 32px rgba(15, 20, 40, .16)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-ui);font-size:var(--fs-base);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}::selection{background:var(--accent);color:var(--accent-ink)}#app{min-width:0}svg.icon{display:inline-block;vertical-align:-.125em;flex:none}.app-header{position:sticky;top:0;z-index:30;background:var(--bg);padding:14px clamp(16px,4vw,32px)}.app-header-inner{max-width:1120px;margin:0 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