@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-cyrillic-ext-wght-normal.BOeWTOD4.woff2)format("woff2-variations");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-cyrillic-wght-normal.DqGufNeO.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-greek-ext-wght-normal.DlzME5K_.woff2)format("woff2-variations");unicode-range:U+1F??}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-greek-wght-normal.CkhJZR-_.woff2)format("woff2-variations");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-vietnamese-wght-normal.CBcvBZtf.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-latin-ext-wght-normal.DO1Apj_S.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-latin-wght-normal.Dx4kXJAl.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Newsreader Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(/_astro/newsreader-vietnamese-opsz-normal.BjhtXyW2.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Newsreader Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(/_astro/newsreader-latin-ext-opsz-normal.BQn1nviT.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Newsreader Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(/_astro/newsreader-latin-opsz-normal.s-izfB6B.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--abyss:#050e16;--ink:#07131d;--ink-2:#0c2131;--tide:#123a50;--current:#1d5b78;--cyan:#62d6e2;--cyan-soft:#b6eef3;--foam:#e9fbfc;--paper:#eef1f0;--paper-2:#e1e7e6;--sand:#c9b98f;--text:#0b1720;--text-2:#3a4a54;--muted:#5a6972;--on-dark:#e8f2f5;--on-dark-2:#a5b9c2;--line:#0b17201f;--line-dark:#e8f2f524;--signal:#f2b45a;--alert:#ff7a59;--font-display:"Newsreader Variable", "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;--font-body:"Inter Variable", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;--step--1:clamp(.84rem, .82rem + .1vw, .9rem);--step-0:clamp(1rem, .97rem + .15vw, 1.0625rem);--step-1:clamp(1.15rem, 1.08rem + .35vw, 1.35rem);--step-2:clamp(1.4rem, 1.25rem + .75vw, 1.85rem);--step-3:clamp(1.8rem, 1.5rem + 1.5vw, 2.6rem);--step-4:clamp(2.2rem, 1.7rem + 2.4vw, 3.4rem);--header-h:72px;--gutter:clamp(1.25rem, 4vw, 4rem);--max:1240px;--radius:14px;--ease-water:cubic-bezier(.22, .61, .36, 1);--ease-viscous:cubic-bezier(.65, 0, .35, 1)}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}html{scroll-padding-top:calc(var(--header-h) + 1rem);color-scheme:light}.dark,.dark-band,.site-footer,.film-dialog{color-scheme:dark}a,button,summary{touch-action:manipulation;-webkit-tap-highlight-color:#62d6e22e}body{font-family:var(--font-body);font-size:var(--step-0);color:var(--text);background:var(--paper);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;margin:0;line-height:1.6}:lang(zh-CN) body,body:lang(zh-CN){line-height:1.8}img,svg,video,canvas{max-width:100%;display:block}a{color:inherit}h1,h2,h3{font-family:var(--font-display);letter-spacing:-.012em;text-wrap:balance;margin:0;font-weight:430;line-height:1.1}:lang(zh-CN) h1,:lang(zh-CN) h2,:lang(zh-CN) h3{letter-spacing:.02em;font-weight:600;line-height:1.3}p{margin:0}button{font:inherit;color:inherit}:root{--focus:var(--current)}.dark,.dark-band,.site-footer,.film-dialog,.site-header:not(.on-paper),.site-header.is-open{--focus:var(--cyan)}:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:4px}.skip{background:var(--cyan);color:var(--ink);z-index:100;padding:.6rem 1rem;position:absolute;top:0;left:-999px}.skip:focus{top:1rem;left:1rem}.wrap{width:min(100% - 2 * var(--gutter), var(--max));margin-inline:auto}.eyebrow{font-size:var(--step--1);letter-spacing:.01em;color:var(--current);font-weight:600}.dark .eyebrow,.on-dark .eyebrow{color:var(--cyan)}.lede{font-size:var(--step-1);color:var(--text-2);text-wrap:pretty;max-width:44ch;line-height:1.5}:lang(zh-CN) .lede{max-width:32em;line-height:1.7}.dark .lede{color:var(--on-dark-2)}.dark{background:var(--ink);color:var(--on-dark)}.btn{min-height:48px;font-weight:600;font-size:var(--step--1);letter-spacing:.01em;cursor:pointer;transition:background-color .3s var(--ease-water), color .3s var(--ease-water), border-color .3s var(--ease-water);background:0 0;border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;gap:.6rem;padding:.75rem 1.35rem;line-height:1.2;text-decoration:none;display:inline-flex}.btn-primary{background:var(--tide);color:#fff}.btn-primary:hover{background:var(--current)}.dark .btn-primary,.dark-band .btn-primary{background:var(--cyan);color:var(--ink)}.dark .btn-primary:hover,.dark-band .btn-primary:hover{background:var(--foam)}.btn-ghost{border-color:currentColor}.btn-ghost:hover{background:#1d5b7814}.dark .btn-ghost:hover,.dark-band .btn-ghost:hover{background:#62d6e21f}.site-header{z-index:50;color:var(--on-dark);transition:background .5s var(--ease-water), color .5s var(--ease-water), box-shadow .5s;position:fixed;inset:0 0 auto}.site-header.is-solid{backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line-dark);background:#07131dd1}.site-header.on-paper:not(.is-open){color:var(--text)}.site-header.on-paper.is-solid:not(.is-open){box-shadow:0 1px 0 var(--line);background:#eef1f0e0}.header-row{height:var(--header-h);justify-content:space-between;align-items:center;display:flex}.brand{min-height:44px;font-family:var(--font-display);align-items:center;gap:.55rem;font-size:1.35rem;text-decoration:none;display:inline-flex}.brand em{color:var(--cyan);font-style:italic}.on-paper .brand em{color:var(--current)}.brand svg{width:30px;height:18px}.nav{font-size:var(--step--1);white-space:nowrap;align-items:center;gap:clamp(1rem,1.6vw,1.6rem);display:flex}.nav a{opacity:.86;text-decoration:none;transition:opacity .3s}.nav a:hover,.nav a[aria-current=page]{opacity:1}.nav a[aria-current=page]{box-shadow:0 1px}.nav .lang{opacity:.7;border:1px solid;border-radius:999px;padding:.2rem .7rem}.nav .nav-cta{color:var(--ink);background:var(--cyan);opacity:1;border-radius:999px;padding:.5rem 1rem;font-weight:600}.on-paper:not(.is-open) .nav .nav-cta{color:#fff;background:var(--tide)}.menu-btn{cursor:pointer;background:0 0;border:0;justify-content:center;align-items:center;width:44px;height:44px;margin-right:-10px;display:none}@media (width<=1080px){.menu-btn{display:inline-flex}.nav{inset:var(--header-h) 0 auto 0;padding:1.5rem var(--gutter) 2rem;background:var(--ink);color:var(--on-dark);font-size:var(--step-1);visibility:hidden;transition:transform .5s var(--ease-water), visibility 0s .5s;flex-direction:column;align-items:flex-start;gap:1.1rem;position:fixed;transform:translateY(-120%)}.site-header.is-open .nav{visibility:visible;transition:transform .5s var(--ease-water);transform:none}}.section{padding-block:clamp(4rem,8vw,7rem)}.section-head{gap:.9rem;max-width:48rem;margin-bottom:clamp(2rem,4vw,3.2rem);display:grid}.section-head h2{font-size:var(--step-3)}.page-hero{padding-top:calc(var(--header-h) + clamp(2.5rem, 6vw, 5rem));padding-bottom:clamp(2.5rem,5vw,4rem)}.page-hero h1{font-size:var(--step-4);max-width:20ch;margin-block:.8rem 1.2rem}:lang(zh-CN) .page-hero h1{max-width:15em}.status{letter-spacing:.02em;color:var(--current);border:1px solid;border-radius:1rem;align-items:center;gap:.45rem;padding:.2rem .7rem;font-size:.78rem;line-height:1.35;display:inline-flex}.status:before{content:"";background:currentColor;border-radius:50%;flex:none;width:6px;height:6px}.dark .status,.dark-band .status{color:var(--cyan)}.note{font-size:var(--step--1);color:var(--muted)}.dark .note,.dark-band .note{color:var(--on-dark-2)}.prose{gap:1rem;max-width:46rem;display:grid}.prose p{color:var(--text-2)}.dark .prose p,.dark-band .prose p{color:var(--on-dark-2)}.card-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,17rem),1fr));gap:1.2rem;display:grid}.card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;align-content:start;gap:.8rem;padding:clamp(1.3rem,2.4vw,2rem);display:grid}.card h3{font-size:var(--step-1)}.card p{color:var(--text-2)}a.card{transition:border-color .3s var(--ease-water);text-decoration:none}a.card:hover{border-color:var(--current)}.text-link{color:var(--current);text-underline-offset:.28em;transition:text-decoration-color .3s var(--ease-water);font-weight:600;text-decoration:underline 1px #1d5b7866}.text-link:hover{text-decoration-color:currentColor}.dark .text-link,.dark-band .text-link{color:var(--cyan);text-decoration-color:#62d6e273}.dark .text-link:hover,.dark-band .text-link:hover{text-decoration-color:currentColor}.link-list{flex-wrap:wrap;gap:.6rem 1.4rem;margin:0;padding:0;list-style:none;display:flex}@media (width<=820px),(pointer:coarse){.link-list a{align-items:center;min-height:44px;display:inline-flex}}.sim-note{color:var(--muted);align-items:center;gap:.45rem;font-size:.78rem;display:inline-flex}.sim-note:before{content:"";border:1.5px dashed;border-radius:3px;width:10px;height:10px}.dark .sim-note,.dark-band .sim-note{color:var(--on-dark-2)}.dark-band{background:var(--ink);color:var(--on-dark);border-radius:var(--radius);padding:clamp(1.2rem,3vw,2.4rem)}.dark-band .eyebrow{color:var(--cyan)}.table-wrap{overflow-x:auto}.data-table{border-collapse:collapse;width:100%;font-size:var(--step--1)}.data-table th,.data-table td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:.85rem 1rem}.data-table thead th{color:var(--muted);border-bottom-color:var(--text);font-weight:600}.data-table tbody th{font-weight:600}.dark-band .data-table th,.dark-band .data-table td{border-bottom-color:var(--line-dark)}.dark-band .data-table thead th{color:var(--on-dark-2);border-bottom-color:var(--on-dark-2)}@media (width<=720px){.data-table thead{clip:rect(0 0 0 0);width:1px;height:1px;position:absolute;overflow:hidden}.data-table tr{border-bottom:1px solid var(--line);padding:.8rem 0;display:grid}.data-table th,.data-table td{border:0;padding:.25rem 0}.data-table td[data-label]:before{content:attr(data-label);color:var(--muted);font-size:.74rem;display:block}}.details{border-top:1px solid var(--line)}.details:last-of-type{border-bottom:1px solid var(--line)}.details summary{cursor:pointer;justify-content:space-between;gap:1rem;padding:1rem 0;font-weight:600;list-style:none;display:flex}.details summary::-webkit-details-marker{display:none}.details summary:after{content:"+";color:var(--current);font-weight:400}.details[open] summary:after{content:"−"}.details>:not(summary){padding-bottom:1.2rem}.dark-band .details{border-color:var(--line-dark)}.site-footer{background:var(--abyss);color:var(--on-dark-2);font-size:var(--step--1);padding-block:3.5rem 2.5rem}.footer-grid{grid-template-columns:1.4fr 1fr;align-items:end;gap:2rem;display:grid}.footer-grid .brand{color:var(--on-dark)}.footer-links{flex-wrap:wrap;justify-content:flex-end;gap:1.2rem;display:flex}.footer-links a{text-decoration:none}.footer-links a:hover{color:var(--on-dark);text-underline-offset:.25em;text-decoration:underline}@media (width<=820px),(pointer:coarse){.footer-links{gap:0 1.2rem}.footer-links a{align-items:center;min-height:44px;display:inline-flex}}.footer-bottom{border-top:1px solid var(--line-dark);flex-wrap:wrap;justify-content:space-between;gap:1rem;margin-top:2.5rem;padding-top:1.5rem;display:flex}@media (width<=720px){.footer-grid{grid-template-columns:1fr}.footer-links{justify-content:flex-start}}.film-dialog{overscroll-behavior:contain;background:0 0;border:0;width:min(96vw,1280px,177.778dvh - 10.6667rem);max-width:none;padding:0;overflow:visible}.film-dialog[open]{gap:.5rem;display:grid}.film-dialog::backdrop{backdrop-filter:blur(6px);background:#03090edb}.film-dialog video{aspect-ratio:16/9;background:#000;border-radius:12px;width:100%}.film-dialog .film-close{color:var(--on-dark);cursor:pointer;font-size:var(--step--1);background:0 0;border:0;justify-self:end;padding:.4rem 0}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;overflow:hidden;position:absolute!important}