@font-face{font-family:Overpass Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/overpass-cyrillic-ext-wght-normal.B1PfurAb.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:Overpass Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/overpass-cyrillic-wght-normal.Bb0oHPsy.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Overpass Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/overpass-vietnamese-wght-normal.BfgOsjc9.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:Overpass Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/overpass-latin-ext-wght-normal.DvafStyF.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:Overpass Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/overpass-latin-wght-normal.qAR8M_co.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{--sign:#0b5a44;--sign-deep:#084231;--ink:#14211d;--ink-2:#42524c;--ink-3:#62716b;--paper:#f4f6f2;--paper-2:#e8ede7;--card:#fff;--hair:#d3dbd3;--brand:#fdb800;--brand-deep:#e5a600;--accent:#0b5a44;--accent-ink:#084231;--on-sign:#f6f8f4;--on-sign-2:#f6f8f4cc;--shadow:8 66 49;--sans:"Overpass Variable", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;--max:1160px;--gutter:clamp(20px, 4vw, 48px);--r-sm:6px;--r-md:12px;--r-lg:20px}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}body{background:var(--paper);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;margin:0;font-size:1.0625rem;line-height:1.75}img{max-width:100%;height:auto;display:block}a{color:var(--accent);text-underline-offset:3px;text-decoration-thickness:1px}a:hover{color:var(--accent-ink)}:focus-visible{outline:3px solid var(--sign);outline-offset:3px;border-radius:3px}.on-sign :focus-visible{outline-color:var(--brand)}h1,h2,h3{text-wrap:balance;margin:0;font-weight:700;line-height:1.25}h1{letter-spacing:-.01em;font-size:clamp(2.05rem,1.2rem + 3.4vw,3.35rem);line-height:1.18}h2{font-size:clamp(1.55rem,1.1rem + 1.7vw,2.2rem)}h3{font-size:1.2rem;line-height:1.4}p{margin:0}ul,ol{margin:0;padding:0;list-style:none}.container{width:100%;max-width:calc(var(--max) + var(--gutter) * 2);padding-inline:var(--gutter);margin-inline:auto}.section{padding-block:clamp(56px,7.5vw,104px)}.section.tint{background:var(--paper-2)}.section-head{max-width:46rem;margin-bottom:clamp(28px,4vw,48px)}.section-head p{color:var(--ink-2);margin-top:14px}.num{font-variant-numeric:tabular-nums;font-weight:700}.muted{color:var(--ink-3);font-size:.92rem}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.btn{min-height:48px;font:inherit;cursor:pointer;border:2px solid #0000;border-radius:999px;justify-content:center;align-items:center;padding:10px 26px;font-weight:700;line-height:1.3;text-decoration:none;transition:background-color .15s,border-color .15s,color .15s;display:inline-flex}.btn-primary{background:var(--brand);color:var(--ink)}.btn-primary:hover{background:var(--brand-deep);color:var(--ink)}.btn-ghost{border-color:var(--sign);color:var(--sign);background:0 0}.btn-ghost:hover{background:var(--sign);color:var(--on-sign)}.btn[disabled]{opacity:.6;cursor:progress}.site-head{z-index:20;backdrop-filter:blur(8px);border-bottom:1px solid var(--hair);background:#f4f6f2f0;position:sticky;top:0}.site-head .container{align-items:center;gap:24px;min-height:68px;display:flex}.logo{color:var(--ink);align-items:center;gap:12px;text-decoration:none;display:inline-flex}.logo-plate{background:var(--sign);border-radius:8px;padding:3px;display:inline-block}.logo-plate span{border:1.5px solid var(--on-sign);color:var(--on-sign);letter-spacing:.03em;border-radius:5px;padding:5px 10px 2px;font-size:1.12rem;font-weight:800;line-height:1.2;display:block}.logo-sub{color:var(--ink-3);font-size:.82rem;line-height:1.3}.site-nav{align-items:center;gap:clamp(14px,2vw,28px);margin-left:auto;display:flex}.site-nav a:not(.btn){color:var(--ink-2);padding-block:8px;font-size:.96rem;text-decoration:none}.site-nav a:not(.btn):hover{color:var(--sign);text-decoration:underline}.site-nav .btn{min-height:42px;padding:6px 20px;font-size:.96rem}@media (width<=860px){.site-nav a:not(.btn),.logo-sub{display:none}}.site-foot{background:var(--ink);color:#f6f8f4c7;padding-block:48px 36px;font-size:.94rem}.site-foot a{color:var(--on-sign)}.site-foot :focus-visible{outline-color:var(--brand)}.foot-grid{grid-template-columns:1.3fr 1fr 1fr;gap:32px;display:grid}.foot-grid h2{color:var(--on-sign);margin-bottom:10px;font-size:1rem}.foot-grid li+li{margin-top:6px}.foot-note{border-top:1px solid #f6f8f42e;margin-top:36px;padding-top:20px;font-size:.86rem;line-height:1.7}@media (width<=760px){.foot-grid{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}.page-head{max-width:46rem;margin-bottom:clamp(28px,4vw,44px)}.page-head h1{font-size:clamp(1.9rem,1.3rem + 2.4vw,2.7rem)}.page-head .lead{color:var(--ink-2);margin-top:16px;font-size:clamp(1.06rem,.98rem + .35vw,1.18rem)}.page-head .muted{margin-top:10px}.prose{max-width:46rem;color:var(--ink-2)}.prose>*+*{margin-top:1.05em}.prose h2{border-top:1px solid var(--hair);color:var(--ink);margin-top:2.2em;padding-top:1.1em;font-size:clamp(1.3rem,1.1rem + .8vw,1.6rem)}.prose h3{color:var(--ink);margin-top:1.6em}.prose strong{color:var(--ink)}.prose ul{padding-left:1.3em;list-style:outside}.prose ol{padding-left:1.5em;list-style:decimal}.prose li+li{margin-top:.5em}.prose li::marker{color:var(--sign)}.prose a{overflow-wrap:anywhere}.table-scroll{border:1px solid var(--hair);border-radius:var(--r-md);background:var(--card);overflow-x:auto}.prose table{border-collapse:collapse;width:100%;min-width:620px;font-size:.95rem;line-height:1.6}.prose th,.prose td{text-align:left;vertical-align:top;border-top:1px solid var(--hair);padding:12px 16px}.prose thead th{color:var(--ink-3);white-space:nowrap;border-top:0;font-size:.88rem;font-weight:600}.prose td:first-child{color:var(--ink);white-space:nowrap;font-weight:700}