.header[data-astro-cid-3ef6ksr2]{position:sticky;top:0;z-index:var(--z-sticky);height:var(--header-height);background:var(--header-bg);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:.5px solid var(--color-border)}.header__nav[data-astro-cid-3ef6ksr2]{height:100%;display:flex;align-items:center;justify-content:space-between}.header__logo[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:7px;font-weight:600;font-size:18px;color:var(--color-ink);letter-spacing:-.02em}.header__logo-mark[data-astro-cid-3ef6ksr2]{width:22px;height:22px;border-radius:50%;background:var(--color-accent);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:13px}.header__links[data-astro-cid-3ef6ksr2]{display:flex;gap:34px;list-style:none}.header__links[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{font-size:13px;color:var(--color-ink-body);transition:color var(--transition-fast)}.header__links[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]:hover,.header__links[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2].is-active{color:var(--color-accent)}.header__toggle[data-astro-cid-3ef6ksr2]{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:4px;padding:6px}.header__toggle[data-astro-cid-3ef6ksr2] span[data-astro-cid-3ef6ksr2]{width:18px;height:1.5px;background:var(--color-ink);display:block;transition:var(--transition-fast)}@media(max-width:768px){.header__toggle[data-astro-cid-3ef6ksr2]{display:flex}.header__links[data-astro-cid-3ef6ksr2]{position:fixed;top:var(--header-height);left:0;right:0;flex-direction:column;gap:0;background:var(--color-bg);border-bottom:.5px solid var(--color-border);padding:8px 22px 16px;transform:translateY(-120%);transition:transform var(--transition-base)}.header__links[data-astro-cid-3ef6ksr2].is-open{transform:translateY(0)}.header__links[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{display:block;padding:12px 0;font-size:16px}}.footer[data-astro-cid-sz7xmlte]{margin-top:var(--space-24);padding:var(--space-12) 0;border-top:.5px solid var(--color-border)}.footer__inner[data-astro-cid-sz7xmlte]{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:var(--space-4)}.footer__copy[data-astro-cid-sz7xmlte]{font-size:var(--text-sm);color:var(--color-ink-muted)}.footer__links[data-astro-cid-sz7xmlte]{display:flex;gap:var(--space-6);list-style:none}.footer__links[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{font-size:var(--text-sm);color:var(--color-ink-muted);transition:color var(--transition-fast)}.footer__links[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]:hover{color:var(--color-accent)}@media(max-width:768px){.footer__inner[data-astro-cid-sz7xmlte]{flex-direction:column;align-items:flex-start}}:root{--color-primary: #1D1D1F;--color-primary-hover: #000000;--color-primary-soft: #F5F5F7;--color-accent: #0071E3;--color-accent-hover: #0077ED;--color-ink: #1D1D1F;--color-ink-body: #424245;--color-ink-muted: #86868B;--color-bg: #FFFFFF;--color-bg-secondary: #F5F5F7;--color-border: rgba(0, 0, 0, .08);--color-border-hover: rgba(0, 0, 0, .16);--color-success: #0F7B43;--color-warning: #B25000;--color-error: #D70015;--font-zh: "PingFang SC", "Noto Sans SC", system-ui, sans-serif;--font-en: -apple-system, "SF Pro Display", system-ui, "Inter", sans-serif;--font-mono: ui-monospace, "SF Mono", monospace;--text-hero: 3.5rem;--text-h1: 3rem;--text-h2: 2.25rem;--text-h3: 1.5rem;--text-h4: 1.1875rem;--text-body: 1.0625rem;--text-sm: .875rem;--text-xs: .75rem;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-6: 1.5rem;--space-8: 2rem;--space-12: 3rem;--space-16: 4rem;--space-20: 5rem;--space-24: 6rem;--space-32: 8rem;--container-max: 1120px;--container-prose: 692px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--radius-xl: 28px;--radius-full: 980px;--ease: cubic-bezier(.4, 0, .2, 1);--transition-fast: .2s cubic-bezier(.4, 0, .2, 1);--transition-base: .3s cubic-bezier(.4, 0, .2, 1);--shadow-card: 0 4px 24px rgba(0, 0, 0, .04);--shadow-card-hover: 0 8px 40px rgba(0, 0, 0, .08);--header-height: 48px;--header-bg: rgba(255, 255, 255, .72);--z-sticky: 200;--z-modal: 400;--z-toast: 500}@media(max-width:768px){:root{--text-hero: 2.25rem;--text-h1: 2rem;--text-h2: 1.625rem;--text-h3: 1.25rem;--text-body: 1rem}}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}body{font-family:var(--font-zh);font-size:var(--text-body);line-height:1.6;color:var(--color-ink-body);background:var(--color-bg)}h1,h2,h3,h4{color:var(--color-ink);font-weight:600;letter-spacing:-.02em;line-height:1.15}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}.container{max-width:var(--container-max);margin:0 auto;padding:0 22px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}