:root{--app-max-width: 1120px;--x-padding: clamp(14px, 4vw, 24px);--app-radius: 14px;--app-radius-sm: 10px;--app-ease: cubic-bezier(.22, 1, .36, 1);--app-duration-fast: .16s;--app-duration: .22s;--app-font-sans: "Fira Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Apple Color Emoji", "Segoe UI Emoji";--app-font-mono: "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--app-bg: #f6f7fb;--app-bg-glow-1: rgba(37, 99, 235, .1);--app-bg-glow-2: rgba(14, 165, 233, .08);--app-surface: rgba(255, 255, 255, .78);--app-surface-solid: #ffffff;--app-surface-2: rgba(248, 250, 252, .92);--app-border: rgba(15, 23, 42, .12);--app-border-strong: rgba(15, 23, 42, .18);--app-text: #0f172a;--app-text-muted: rgba(15, 23, 42, .68);--app-brand: #2563eb;--app-brand-2: #0ea5e9;--app-shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 12px 30px 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