@font-face{font-family:Onest Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/onest-cyrillic-ext-wght-normal.DOFToQv1.woff2) format("woff2-variations");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Onest Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/onest-cyrillic-wght-normal.DayYxulF.woff2) format("woff2-variations");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:Onest Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/onest-math-wght-normal.Bl4ZGkZl.woff2) format("woff2-variations");unicode-range:U+0302-0303,U+0305,U+0307-0308,U+0310,U+0312,U+0315,U+031A,U+0326-0327,U+032C,U+032F-0330,U+0332-0333,U+0338,U+033A,U+0346,U+034D,U+0391-03A1,U+03A3-03A9,U+03B1-03C9,U+03D1,U+03D5-03D6,U+03F0-03F1,U+03F4-03F5,U+2016-2017,U+2034-2038,U+203C,U+2040,U+2043,U+2047,U+2050,U+2057,U+205F,U+2070-2071,U+2074-208E,U+2090-209C,U+20D0-20DC,U+20E1,U+20E5-20EF,U+2100-2112,U+2114-2115,U+2117-2121,U+2123-214F,U+2190,U+2192,U+2194-21AE,U+21B0-21E5,U+21F1-21F2,U+21F4-2211,U+2213-2214,U+2216-22FF,U+2308-230B,U+2310,U+2319,U+231C-2321,U+2336-237A,U+237C,U+2395,U+239B-23B7,U+23D0,U+23DC-23E1,U+2474-2475,U+25AF,U+25B3,U+25B7,U+25BD,U+25C1,U+25CA,U+25CC,U+25FB,U+266D-266F,U+27C0-27FF,U+2900-2AFF,U+2B0E-2B11,U+2B30-2B4C,U+2BFE,U+3030,U+FF5B,U+FF5D,U+1D400-1D7FF,U+1EE00-1EEFF}@font-face{font-family:Onest Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/onest-symbols-wght-normal.DxQzqQfC.woff2) format("woff2-variations");unicode-range:U+0001-000C,U+000E-001F,U+007F-009F,U+20DD-20E0,U+20E2-20E4,U+2150-218F,U+2190,U+2192,U+2194-2199,U+21AF,U+21E6-21F0,U+21F3,U+2218-2219,U+2299,U+22C4-22C6,U+2300-243F,U+2440-244A,U+2460-24FF,U+25A0-27BF,U+2800-28FF,U+2921-2922,U+2981,U+29BF,U+29EB,U+2B00-2BFF,U+4DC0-4DFF,U+FFF9-FFFB,U+10140-1018E,U+10190-1019C,U+101A0,U+101D0-101FD,U+102E0-102FB,U+10E60-10E7E,U+1D2C0-1D2D3,U+1D2E0-1D37F,U+1F000-1F0FF,U+1F100-1F1AD,U+1F1E6-1F1FF,U+1F30D-1F30F,U+1F315,U+1F31C,U+1F31E,U+1F320-1F32C,U+1F336,U+1F378,U+1F37D,U+1F382,U+1F393-1F39F,U+1F3A7-1F3A8,U+1F3AC-1F3AF,U+1F3C2,U+1F3C4-1F3C6,U+1F3CA-1F3CE,U+1F3D4-1F3E0,U+1F3ED,U+1F3F1-1F3F3,U+1F3F5-1F3F7,U+1F408,U+1F415,U+1F41F,U+1F426,U+1F43F,U+1F441-1F442,U+1F444,U+1F446-1F449,U+1F44C-1F44E,U+1F453,U+1F46A,U+1F47D,U+1F4A3,U+1F4B0,U+1F4B3,U+1F4B9,U+1F4BB,U+1F4BF,U+1F4C8-1F4CB,U+1F4D6,U+1F4DA,U+1F4DF,U+1F4E3-1F4E6,U+1F4EA-1F4ED,U+1F4F7,U+1F4F9-1F4FB,U+1F4FD-1F4FE,U+1F503,U+1F507-1F50B,U+1F50D,U+1F512-1F513,U+1F53E-1F54A,U+1F54F-1F5FA,U+1F610,U+1F650-1F67F,U+1F687,U+1F68D,U+1F691,U+1F694,U+1F698,U+1F6AD,U+1F6B2,U+1F6B9-1F6BA,U+1F6BC,U+1F6C6-1F6CF,U+1F6D3-1F6D7,U+1F6E0-1F6EA,U+1F6F0-1F6F3,U+1F6F7-1F6FC,U+1F700-1F7FF,U+1F800-1F80B,U+1F810-1F847,U+1F850-1F859,U+1F860-1F887,U+1F890-1F8AD,U+1F8B0-1F8BB,U+1F8C0-1F8C1,U+1F900-1F90B,U+1F93B,U+1F946,U+1F984,U+1F996,U+1F9E9,U+1FA00-1FA6F,U+1FA70-1FA7C,U+1FA80-1FA89,U+1FA8F-1FAC6,U+1FACE-1FADC,U+1FADF-1FAE9,U+1FAF0-1FAF8,U+1FB00-1FBFF}@font-face{font-family:Onest Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/onest-vietnamese-wght-normal.BBxOatbv.woff2) format("woff2-variations");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Onest Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/onest-latin-ext-wght-normal.QAhDxQuo.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,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:Onest Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/onest-latin-wght-normal.Dun_Rd-l.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/jetbrains-mono-cyrillic-ext-400-normal.C_uLvvQ5.woff2) format("woff2"),url(/_astro/jetbrains-mono-cyrillic-ext-400-normal.Bh0R7Dhr.woff) format("woff");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/jetbrains-mono-cyrillic-400-normal.BEIGL1Tu.woff2) format("woff2"),url(/_astro/jetbrains-mono-cyrillic-400-normal.ugxPyKxw.woff) format("woff");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/jetbrains-mono-greek-400-normal.C190GLew.woff2) format("woff2"),url(/_astro/jetbrains-mono-greek-400-normal.B9oWc5Lo.woff) format("woff");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/jetbrains-mono-vietnamese-400-normal.ByoDsISC.woff2) format("woff2"),url(/_astro/jetbrains-mono-vietnamese-400-normal.CqNFfHCs.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/jetbrains-mono-latin-ext-400-normal.Bc8Ftmh3.woff2) format("woff2"),url(/_astro/jetbrains-mono-latin-ext-400-normal.fXTG6kC5.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,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:JetBrains Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/jetbrains-mono-latin-400-normal.V6pRDFza.woff2) format("woff2"),url(/_astro/jetbrains-mono-latin-400-normal.6-qcROiO.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/_astro/jetbrains-mono-cyrillic-ext-500-normal.C9ShMxGR.woff2) format("woff2"),url(/_astro/jetbrains-mono-cyrillic-ext-500-normal.CEVyPk4Y.woff) format("woff");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/_astro/jetbrains-mono-cyrillic-500-normal.DmUKJPL_.woff2) format("woff2"),url(/_astro/jetbrains-mono-cyrillic-500-normal.DJqRU3vO.woff) format("woff");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/_astro/jetbrains-mono-greek-500-normal.JpySY46c.woff2) format("woff2"),url(/_astro/jetbrains-mono-greek-500-normal.D7SFKleX.woff) format("woff");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/_astro/jetbrains-mono-vietnamese-500-normal.BvH7FW2L.woff2) format("woff2"),url(/_astro/jetbrains-mono-vietnamese-500-normal.DNRqzVM1.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/_astro/jetbrains-mono-latin-ext-500-normal.Cut-4mMH.woff2) format("woff2"),url(/_astro/jetbrains-mono-latin-ext-500-normal.ckzbgY84.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,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:JetBrains Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/_astro/jetbrains-mono-latin-500-normal.BWZEU5yA.woff2) format("woff2"),url(/_astro/jetbrains-mono-latin-500-normal.CJOVTJB7.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{color-scheme:light;--bg: #f6f7fa;--surface: #ffffff;--ink: #14161c;--text: #4b5060;--muted: #5f6474;--line: #e4e7ee;--line-strong: #d3d8e2;--accent: #1f56e0;--accent-hover: #1747c4;--accent-soft: #e8eefc;--accent-on: #ffffff;--accent-sub: #d6e0ff;--ok: #137a3a;--ok-soft: #e2f6ea;--warn: #8a4b00;--warn-soft: #fff4e2;--radius-sm: 10px;--radius: 20px;--radius-lg: 28px;--shadow: 0 30px 60px -30px rgba(40, 50, 90, .35);--font: "Onest Variable", system-ui, -apple-system, "Segoe UI", sans-serif;--mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;--gutter: clamp(16px, 4vw, 24px)}:lang(zh){--font: "Onest Variable", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:80px}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}h1,h2,h3,p,ul,ol,figure{margin:0}ul,ol{padding:0;list-style:none}img,svg{display:block;max-width:100%}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 55%,transparent);outline-offset:2px;border-radius:6px}.wrap{width:100%;max-width:1200px;margin-inline:auto;padding-inline:var(--gutter)}.section{padding-block:clamp(64px,9vw,104px)}.band{background:var(--surface);border-block:1px solid var(--line)}.eyebrow{font-size:14px;font-weight:500;color:var(--accent)}.h2{font-size:clamp(28px,3.4vw,40px);line-height:1.12;letter-spacing:-.03em;font-weight:600;text-wrap:balance}.head{display:flex;flex-direction:column;gap:14px;max-width:680px}.lead{font-size:17px;line-height:1.6;color:var(--text);text-wrap:pretty}.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}.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--ink);color:#fff;padding:10px 14px;border-radius:var(--radius-sm)}.skip:focus{top:12px;color:#fff}.header[data-astro-cid-3ef6ksr2]{position:sticky;top:0;z-index:20;background:#f6f7fadb;backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line)}.bar[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:28px;min-height:60px}.brand[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:600;font-size:17px;letter-spacing:-.01em}.brand[data-astro-cid-3ef6ksr2]:hover{color:var(--ink)}.logo[data-astro-cid-3ef6ksr2]{width:34px;height:auto}.nav[data-astro-cid-3ef6ksr2]{display:none;flex:1;gap:24px;font-size:15px}.nav[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{color:var(--text)}.nav[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]:hover{color:var(--ink)}.actions[data-astro-cid-3ef6ksr2]{margin-left:auto;display:flex;align-items:center;gap:8px}.cta[data-astro-cid-3ef6ksr2]{background:var(--accent);color:var(--accent-on);font-weight:500;font-size:15px;padding:9px 16px;border-radius:var(--radius-sm)}.cta[data-astro-cid-3ef6ksr2]:hover{background:var(--accent-hover);color:var(--accent-on)}details[data-astro-cid-3ef6ksr2]{position:relative}summary[data-astro-cid-3ef6ksr2]{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 10px;border-radius:var(--radius-sm);color:var(--text);font-size:14px;font-weight:500}summary[data-astro-cid-3ef6ksr2]::-webkit-details-marker{display:none}summary[data-astro-cid-3ef6ksr2]:hover,details[data-astro-cid-3ef6ksr2][open] summary[data-astro-cid-3ef6ksr2]{background:#14161c0f;color:var(--ink)}.pop[data-astro-cid-3ef6ksr2]{position:absolute;right:0;top:calc(100% + 8px);min-width:200px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 20px 40px -20px #28325a59;padding:6px;display:flex;flex-direction:column}.pop[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{display:block;padding:10px 12px;border-radius:8px;color:var(--ink);font-size:15px}.pop[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]:hover{background:var(--bg)}.pop[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2][aria-current]{color:var(--accent);font-weight:500}.lang[data-astro-cid-3ef6ksr2] .pop[data-astro-cid-3ef6ksr2]{min-width:150px}@media(min-width:960px){.nav[data-astro-cid-3ef6ksr2]{display:flex}.menu[data-astro-cid-3ef6ksr2]{display:none}}[data-os=phone] .cta[data-astro-cid-3ef6ksr2]{display:none}@media(max-width:340px){.brand[data-astro-cid-3ef6ksr2] span[data-astro-cid-3ef6ksr2]{display:none}}.footer[data-astro-cid-sz7xmlte]{border-top:1px solid var(--line);background:var(--surface);padding-block:48px 32px}.cols[data-astro-cid-sz7xmlte]{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,180px),1fr));gap:32px}@media(min-width:760px){.cols[data-astro-cid-sz7xmlte]{grid-template-columns:2fr repeat(3,minmax(0,1fr))}}.about[data-astro-cid-sz7xmlte]{display:flex;flex-direction:column;gap:12px}.brand[data-astro-cid-sz7xmlte]{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:600;font-size:16px}.logo[data-astro-cid-sz7xmlte]{width:30px;height:auto}.about[data-astro-cid-sz7xmlte] p[data-astro-cid-sz7xmlte]{font-size:14px;line-height:1.5;color:var(--muted);max-width:260px}nav[data-astro-cid-sz7xmlte]{display:flex;flex-direction:column;gap:10px;font-size:14px}.h[data-astro-cid-sz7xmlte]{font-weight:600;color:var(--ink)}nav[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{color:var(--text)}nav[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte].h{color:var(--ink)}nav[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]:hover{color:var(--ink)}.bottom[data-astro-cid-sz7xmlte]{margin-top:40px;padding-top:24px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px 32px;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted)}.langs[data-astro-cid-sz7xmlte]{flex-direction:row;gap:16px;font-size:13px}.langs[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte][aria-current]{color:var(--ink);font-weight:500}