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2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--space-20: 5rem;--container-max: 72rem;--container-padding: clamp(1.125rem, 4vw, 3.375rem);--section-padding-y: clamp(3.375rem, 7vw, 5.75rem);--radius-sm: 6px;--radius-md: 2px;--radius-lg: 4px;--duration-fast: .15s;--duration-base: .22s;--ease-standard: cubic-bezier(.4, 0, .2, 1)}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;font-family:var(--font-sans);font-size:var(--font-size-base);font-weight:var(--font-weight-regular);line-height:var(--line-height-base);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased}img,picture,video,canvas,svg{display:block;max-width:100%}input,button,textarea,select{font:inherit}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:.15em}a:hover{color:var(--color-primary)}h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}h1,h2,h3,h4{font-weight:var(--font-weight-semibold);letter-spacing:var(--letter-spacing-tight);line-height:var(--line-height-tight)}h1{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold)}h2{font-size:var(--font-size-xl)}h3{font-size:var(--font-size-lg)}h4{font-size:var(--font-size-md)}p+p{margin-top:var(--space-4)}.eyebrow{margin-bottom:var(--space-3);color:var(--color-accent);font-family:var(--font-mono);font-size:var(--font-size-xs);font-weight:var(--font-weight-medium);letter-spacing:var(--letter-spacing-caps);text-transform:uppercase}.lede{max-width:42rem;color:var(--color-muted);font-size:var(--font-size-md);line-height:var(--line-height-relaxed)}.text-muted,.placeholder-item{color:var(--color-muted)}.placeholder-flag{color:var(--color-muted);font-size:var(--font-size-xs);font-weight:var(--font-weight-semibold)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.container{width:min(100% - (var(--container-padding) * 2),var(--container-max));margin-inline:auto}.section{padding-block:var(--section-padding-y)}.section--surface{background:var(--color-surface);border-block:1px solid var(--color-line)}.stack{display:flex;flex-direction:column;gap:var(--stack-gap, var(--space-4))}.stack--lg{--stack-gap: var(--space-8)}.grid{display:grid;gap:var(--grid-gap, var(--space-4))}.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}@media(max-width:768px){.grid--2,.grid--3{grid-template-columns:1fr}}.card{padding:var(--space-6);background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius-md);box-shadow:var(--shadow-elevated)}.swatch{min-height:3.5rem;padding:var(--space-3);border:1px solid var(--color-line);border-radius:var(--radius-sm);color:var(--color-on-primary);font-size:var(--font-size-xs);font-weight:var(--font-weight-semibold)}.swatch--primary{background:var(--color-primary)}.swatch--accent{background:var(--color-accent)}.swatch--success{background:var(--color-success)}.swatch--surface{background:var(--color-surface);color:var(--color-text)}.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--color-line);border-radius:var(--radius-md);background:var(--color-surface)}table{width:100%;min-width:32rem;border-collapse:collapse;font-size:var(--font-size-sm);font-variant-numeric:tabular-nums}caption{padding:var(--space-4);text-align:left;font-weight:var(--font-weight-bold)}th,td{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-line);text-align:left;vertical-align:top}th{color:var(--color-muted);font-family:var(--font-mono);font-size:var(--font-size-xs);font-weight:var(--font-weight-medium);letter-spacing:var(--letter-spacing-caps);text-transform:uppercase;background:color-mix(in srgb,var(--color-bg) 65%,var(--color-surface))}tbody tr:last-child td{border-bottom:none}:lang(zh-CN),:lang(zh){--font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "IBM Plex Sans", sans-serif;--font-mono: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "IBM Plex Mono", ui-monospace, monospace;--letter-spacing-tight: 0;--letter-spacing-caps: .06em}:lang(zh-CN) .eyebrow,:lang(zh) .eyebrow{text-transform:none}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}