:root{--pc-font-sans: "IBM Plex Sans", "Noto Sans SC", "IBM Plex Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--pc-font-sans-zh: "Noto Sans SC", "IBM Plex Sans SC", "PingFang SC", sans-serif;--pc-font-mono: "IBM Plex Mono", ui-monospace, "Cascadia Code", "SF Mono", monospace;--pc-font-serif: var(--pc-font-sans);--pc-font-serif-en: var(--pc-font-sans);--pc-font-serif-zh: var(--pc-font-sans-zh);--pc-text-manifesto: clamp(44px, 7vw, 88px);--pc-text-display: clamp(32px, 4.5vw, 56px);--pc-text-headline: clamp(24px, 3vw, 36px);--pc-text-title: clamp(18px, 1.8vw, 22px);--pc-text-lead: clamp(17px, 1.3vw, 20px);--pc-text-body-lg: 16px;--pc-text-body: 15px;--pc-text-body-sm: 13px;--pc-text-caption: 12px;--pc-text-micro: 11px;--pc-line-tight: 1.05;--pc-line-display: 1.1;--pc-line-headline: 1.2;--pc-line-snug: 1.4;--pc-line-normal: 1.5;--pc-line-relaxed: 1.6;--pc-line-loose: 1.8;--pc-weight-regular: 400;--pc-weight-medium: 500;--pc-weight-semibold: 600;--pc-weight-bold: 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24px;--pc-space-component: 16px;--pc-space-field: 8px;--pc-container-max: 1200px;--pc-container-prose: 680px;--pc-container-wide: 1360px;--pc-radius-none: 0;--pc-radius-sm: 4px;--pc-radius-md: 6px;--pc-radius-lg: 8px;--pc-radius-pill: 9999px;--pc-shadow-xs: 0 1px 0 rgba(0, 0, 0, .4);--pc-shadow-sm: 0 1px 2px rgba(0, 0, 0, .5);--pc-shadow-md: 0 4px 8px rgba(0, 0, 0, .4), 0 0 0 1px var(--pc-color-border-default);--pc-shadow-lg: 0 12px 32px rgba(0, 0, 0, .5), 0 0 0 1px var(--pc-color-border-strong);--pc-shadow-accent: 0 0 0 1px var(--pc-color-accent-default);--pc-duration-instant: 80ms;--pc-duration-fast: .12s;--pc-duration-base: .18s;--pc-duration-slow: .28s;--pc-duration-manifesto: .4s;--pc-easing: cubic-bezier(.2, 0, 0, 1);--pc-easing-out: cubic-bezier(0, 0, .2, 1);--pc-easing-emphasis: cubic-bezier(.16, 1, .3, 1);--pc-z-base: 1;--pc-z-header: 50;--pc-z-overlay: 100;--pc-z-modal: 200;--pc-header-height: 60px;--pc-rule-width: 1px;--pc-spotlight-color: rgba(16, 185, 129, 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var(--pc-space-page);position:relative;z-index:1}.container-prose{max-width:var(--pc-container-prose)}.container-wide{max-width:var(--pc-container-wide)}.section{padding-block:var(--pc-space-section-y);position:relative;z-index:1}.section-sm{padding-block:var(--pc-space-section-y-sm)}.section-rule{border-top:var(--pc-rule-width) solid 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var(--pc-duration-fast) var(--pc-easing);white-space:nowrap;border:1px solid transparent;cursor:pointer}.btn-primary{background:var(--pc-color-accent-default);color:var(--pc-color-accent-on)}.btn-primary:hover{background:var(--pc-color-accent-hover)}.btn-secondary{background:var(--pc-color-bg-elevated);color:var(--pc-color-text-primary);border-color:var(--pc-color-border-strong)}.btn-secondary:hover{background:var(--pc-color-bg-surface);border-color:var(--pc-color-text-muted)}.btn-ghost{background:transparent;color:var(--pc-color-text-secondary);padding-inline:10px}.btn-ghost:hover{color:var(--pc-color-text-primary);background:var(--pc-color-bg-elevated)}.card{background:var(--pc-color-bg-surface);border:1px solid var(--pc-color-border-default);border-radius:var(--pc-radius-lg);padding:var(--pc-space-card);transition:border-color var(--pc-duration-fast) var(--pc-easing),background-color var(--pc-duration-fast) 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