.site-header[data-astro-cid-fzpbxy5g]{border-bottom:1px solid var(--border);backdrop-filter:blur(18px)saturate(130%);z-index:10;background:#080a0bc7;position:sticky;top:0}.site-header__inner[data-astro-cid-fzpbxy5g]{align-items:center;gap:var(--s3);min-height:72px;padding-block:var(--s2);flex-wrap:wrap;display:flex}.brand[data-astro-cid-fzpbxy5g]{min-height:44px;color:var(--text);letter-spacing:-.025em;align-items:baseline;gap:.48rem;margin-right:auto;font-weight:700;text-decoration:none;display:inline-flex}.brand__en[data-astro-cid-fzpbxy5g]{font-size:1.08rem}.brand__divider[data-astro-cid-fzpbxy5g],.brand__zh[data-astro-cid-fzpbxy5g]{color:var(--text-muted);letter-spacing:.04em;font-size:.82rem;font-weight:500}.brand[data-astro-cid-fzpbxy5g]:hover{color:var(--accent-strong)}.nav[data-astro-cid-fzpbxy5g]{gap:.25rem;list-style:none;display:flex}.nav[data-astro-cid-fzpbxy5g] a[data-astro-cid-fzpbxy5g]{color:var(--text-secondary);border-bottom:1px solid #0000;align-items:center;min-height:44px;padding-inline:.8rem;font-size:.9rem;text-decoration:none;display:inline-flex}.nav[data-astro-cid-fzpbxy5g] a[data-astro-cid-fzpbxy5g]:hover{color:var(--text)}.nav[data-astro-cid-fzpbxy5g] a[data-astro-cid-fzpbxy5g][aria-current=page]{color:var(--text);border-bottom-color:var(--accent)}@media (width<=32rem){.brand[data-astro-cid-fzpbxy5g]{width:100%;margin-right:0}.site-header__inner[data-astro-cid-fzpbxy5g]{gap:.2rem var(--s2);min-height:auto;padding-block:.7rem}.nav[data-astro-cid-fzpbxy5g] a[data-astro-cid-fzpbxy5g]{padding-inline:.65rem}}.site-footer[data-astro-cid-nns7i3if]{border-top:1px solid var(--border);padding-block:var(--s6) var(--s4);background:var(--bg-sunken);margin-top:0}.site-footer__top[data-astro-cid-nns7i3if]{gap:var(--s4);flex-wrap:wrap;justify-content:space-between;align-items:start;display:flex}.brand[data-astro-cid-nns7i3if]{color:var(--text);font-weight:700}.foot-nav[data-astro-cid-nns7i3if]{flex-wrap:wrap;gap:.35rem;font-size:.95rem;list-style:none;display:flex}.foot-nav[data-astro-cid-nns7i3if] a[data-astro-cid-nns7i3if]{min-height:44px;color:var(--text-secondary);align-items:center;padding-inline:.7rem;text-decoration:none;display:inline-flex}.foot-nav[data-astro-cid-nns7i3if] a[data-astro-cid-nns7i3if]:hover{color:var(--text)}.site-footer__legal[data-astro-cid-nns7i3if]{justify-content:space-between;align-items:center;gap:var(--s1) var(--s3);margin-top:var(--s5);padding-top:var(--s3);border-top:1px solid var(--border);flex-wrap:wrap;display:flex}.site-footer__legal[data-astro-cid-nns7i3if] a[data-astro-cid-nns7i3if]{min-height:44px;color:inherit;align-items:center;text-decoration:none;display:inline-flex}.site-footer__legal[data-astro-cid-nns7i3if] a[data-astro-cid-nns7i3if]:hover{color:var(--text);text-underline-offset:.25em;text-decoration:underline}:root{color-scheme:dark;--bg:#0a0c0d;--bg-deep:#060708;--bg-raised:#111416;--bg-soft:#15191b;--border:#c6dde41f;--border-strong:#c6dde43d;--text:#f1f0ec;--text-secondary:#afb5b5;--text-muted:#858d8e;--accent:#73c9de;--accent-strong:#a4deeb;--accent-dim:#73c9de1f;--warm:#f0ad43;--warm-dim:#f0ad431f;--radius:3px;--radius-lg:14px;--s1:.5rem;--s2:1rem;--s3:1.5rem;--s4:2rem;--s5:3rem;--s6:4.5rem;--s7:7rem;--s8:10rem;--measure:38rem;--container:78rem;--font-display:"Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", STSong, serif;--font-body:"Noto Sans CJK SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--font-mono:"Noto Sans Mono CJK SC", "SFMono-Regular", Consolas, monospace;--ease:cubic-bezier(.2, .8, .2, 1)}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;background:var(--bg-deep)}body{background:radial-gradient(circle at 75% 8%, #73c9de0e, transparent 28rem), linear-gradient(180deg, #0c0e0f 0%, var(--bg) 38%, var(--bg-deep) 100%);min-width:320px;color:var(--text);font-family:var(--font-body);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;font-size:1rem;line-height:1.75}body:before{content:"";z-index:-1;pointer-events:none;opacity:.17;background-image:linear-gradient(#ffffff05 1px,#0000 1px),linear-gradient(90deg,#ffffff05 1px,#0000 1px);background-size:64px 64px;position:fixed;inset:0;mask-image:linear-gradient(#000,#0000 72%)}h1,h2,h3,h4{color:var(--text);text-wrap:balance;margin:0;font-weight:600;line-height:1.2}h1,h2{font-family:var(--font-display);letter-spacing:-.035em}h1{font-size:clamp(2.65rem,2rem + 3vw,5.4rem)}h2{font-size:clamp(2rem,1.55rem + 2vw,3.8rem)}h3{letter-spacing:-.015em;font-size:clamp(1.1rem,1rem + .35vw,1.35rem)}p{text-wrap:pretty;margin:0}a{color:var(--accent-strong);text-underline-offset:.22em;transition:color .18s var(--ease), text-decoration-color .18s var(--ease);text-decoration-color:#a4deeb6b}a:hover{color:var(--text);text-decoration-color:currentColor}.prose a:visited{color:#d1b889}img{max-width:100%;height:auto;display:block}ul,ol{margin:0;padding:0}::selection{color:var(--bg-deep);background:var(--accent-strong)}:focus-visible{outline:2px solid var(--accent-strong);outline-offset:4px;border-radius:2px}:focus:not(:focus-visible){outline:none}.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:clamp(1.25rem,4vw,3.25rem)}.section{border-top:1px solid var(--border);padding-block:clamp(5rem,11vw,9rem);position:relative}.section--flush{border-top:0}.stack>*+*{margin-top:var(--s2)}.stack-lg>*+*{margin-top:var(--s4)}.measure{max-width:var(--measure)}.section-head{margin-bottom:clamp(2rem,5vw,4.5rem)}.eyebrow,.kicker{color:var(--accent);font-family:var(--font-mono);letter-spacing:.18em;text-transform:uppercase;font-size:.72rem;font-weight:500;line-height:1.5}.lede{color:var(--text-secondary);font-size:clamp(1.04rem,.98rem + .3vw,1.2rem);line-height:1.8}.skip-link{left:var(--s2);z-index:100;background:var(--accent-strong);min-height:44px;color:var(--bg-deep);border-radius:var(--radius);transition:top .18s var(--ease);padding:.65rem 1rem;font-weight:700;text-decoration:none;position:absolute;top:-100%}.skip-link:focus{top:var(--s2);color:var(--bg-deep)}.btn{border-radius:var(--radius);min-height:48px;font-family:var(--font-body);cursor:pointer;transition:background-color .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease), transform .18s var(--ease), box-shadow .18s var(--ease);border:1px solid #0000;justify-content:center;align-items:center;gap:.65em;padding:.78rem 1.45rem;font-size:.94rem;font-weight:650;text-decoration:none;display:inline-flex}.btn:after{content:"↗";font-family:var(--font-mono);transition:transform .18s var(--ease);font-size:.85em}.btn:hover:after{transform:translate(2px,-2px)}.btn--primary{color:#091012;background:var(--text);box-shadow:0 10px 38px #00000038}.btn--primary:hover{color:#091012;background:var(--accent-strong);transform:translateY(-2px);box-shadow:0 16px 44px #73c9de21}.btn--secondary{color:var(--text);border-color:var(--border-strong);background:#0a0c0d47}.btn--secondary:hover{color:var(--text);background:var(--accent-dim);border-color:#a4deeb8c;transform:translateY(-2px)}.btn--unavailable{color:var(--text-muted);border-color:var(--border);cursor:not-allowed;background:0 0}.btn--unavailable:after{display:none}.btn-row{flex-wrap:wrap;align-items:flex-start;gap:.8rem;display:flex}.grid{gap:var(--s3);display:grid}.card{padding:var(--s3);border:1px solid var(--border);border-radius:var(--radius-lg);transition:border-color .18s var(--ease), transform .18s var(--ease);background:#111416b3}.card:hover{border-color:var(--border-strong)}@media (width>=40rem){.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width>=56rem){.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}}.badge{width:fit-content;min-height:30px;color:var(--text-secondary);border:1px solid var(--border-strong);font-family:var(--font-mono);letter-spacing:.04em;white-space:nowrap;border-radius:999px;align-items:center;gap:.55em;padding:.24rem .72rem;font-size:.74rem;font-weight:500;line-height:1.4;display:inline-flex}.badge__mark{font-size:.72em;line-height:1}.badge--prototype{color:var(--warm);background:var(--warm-dim);border-color:#f0ad436b}.badge--prototype .badge__mark{animation:2.2s ease-in-out infinite status-pulse}.badge--planned{color:var(--text-muted)}.badge--building{color:var(--accent-strong);background:var(--accent-dim);border-color:#73c9de66}.badge--verified{color:#9fd2aa;background:#7eb78f1a;border-color:#7eb78f6b}.badge--type{font-size:.72rem}.prose{max-width:var(--measure);color:var(--text-secondary);font-size:1.06rem}.prose>*+*{margin-top:var(--s2)}.prose h2{margin-top:var(--s5);color:var(--text)}.prose h3{margin-top:var(--s4);color:var(--text)}.prose ul,.prose ol{padding-left:1.3em}.prose li+li{margin-top:.4em}.prose strong{color:var(--text)}.prose blockquote{margin:var(--s3) 0;padding-left:var(--s2);color:var(--text);border-left:2px solid var(--accent)}.prose code{background:var(--bg-deep);border:1px solid var(--border);font-family:var(--font-mono);border-radius:3px;padding:.1em .35em;font-size:.9em}.visually-hidden{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.text-muted{color:var(--text-muted)}.text-secondary{color:var(--text-secondary)}.small{font-size:.88rem}.reveal{animation:reveal-up .72s var(--ease) both}.reveal--2{animation-delay:.1s}.reveal--3{animation-delay:.2s}@keyframes reveal-up{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}@keyframes status-pulse{0%,to{opacity:.48}50%{opacity:1}}@media (width<=40rem){.section{padding-block:4.5rem}.btn-row{gap:.65rem}.btn{padding-inline:1.05rem}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}