:root{--bg:#F7F9FC;--card:#fff;--tx:#172033;--tx2:#5B677B;--ac:#2563EB;--ac2:#0891B2;--ln:#DCE4F0;--glass:rgba(255,255,255,.72);--sh:0 1px 2px rgba(23,32,51,.05),0 8px 24px -12px rgba(37,99,235,.18);--code:#0F172A;--r:14px}
:root[data-theme=dark]{--bg:#0B1120;--card:#131C2E;--tx:#E8EEF8;--tx2:#98A5B8;--ac:#60A5FA;--ac2:#22D3EE;--ln:#22304A;--glass:rgba(11,17,32,.72);--sh:0 8px 28px -14px rgba(0,0,0,.6);--code:#0A0F1C}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--tx);font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,Inter,sans-serif;transition:background .3s,color .3s;overflow-x:hidden}
a{color:var(--ac);text-decoration:none}a:focus-visible,button:focus-visible{outline:2px solid var(--ac);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--card);padding:8px 12px;z-index:99}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
h1,h2,h3{line-height:1.18;letter-spacing:-.02em;margin:0 0 .5em}h1{font-size:clamp(2.4rem,6vw,4.4rem)}h2{font-size:clamp(1.5rem,3vw,2.1rem)}h3{font-size:1.2rem}
.hdr{position:sticky;top:0;z-index:50;border-bottom:1px solid transparent;transition:.3s}.hdr.sc{background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-color:var(--ln)}
.hrow{display:flex;align-items:center;gap:8px;height:68px}.brand{display:flex;align-items:center;gap:10px;color:var(--tx);font-weight:700;letter-spacing:-.01em}
.nav{margin-left:auto;display:flex;gap:2px}.nav a{color:var(--tx2);padding:8px 12px;border-radius:10px;font-size:.95rem;transition:.2s}.nav a:hover,.nav a[aria-current]{color:var(--tx);background:color-mix(in srgb,var(--ac) 10%,transparent)}
.ibtn{background:none;border:1px solid var(--ln);color:var(--tx);width:40px;height:40px;border-radius:10px;display:grid;place-items:center;cursor:pointer;transition:.2s}.ibtn:hover{border-color:var(--ac)}.burger{display:none}
.hero{position:relative;margin-top:-68px;padding:150px 0 90px;overflow:hidden;background:linear-gradient(135deg,color-mix(in srgb,var(--ac) 9%,var(--bg)),var(--bg) 55%,color-mix(in srgb,var(--ac2) 8%,var(--bg)));background-size:200% 200%;animation:gr 24s ease-in-out infinite alternate}
@keyframes gr{to{background-position:100% 100%}}
.orb{position:absolute;border-radius:50%;filter:blur(2px)}.o1{width:420px;height:420px;right:-80px;top:40px;background:radial-gradient(circle,color-mix(in srgb,var(--ac) 22%,transparent),transparent 70%)}.o2{width:300px;height:300px;left:-60px;bottom:-60px;background:radial-gradient(circle,color-mix(in srgb,var(--ac2) 20%,transparent),transparent 70%)}
.grid-bg{position:absolute;inset:0;background-image:linear-gradient(var(--ln) 1px,transparent 1px),linear-gradient(90deg,var(--ln) 1px,transparent 1px);background-size:48px 48px;opacity:.45;mask-image:radial-gradient(ellipse at 70% 40%,#000,transparent 70%);-webkit-mask-image:radial-gradient(ellipse at 70% 40%,#000,transparent 70%)}
.hgrid{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}.sub{color:var(--ac);font-weight:600;margin:0 0 14px}.lead{font-size:1.25rem;color:var(--tx2)}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.btn{display:inline-flex;align-items:center;min-height:46px;padding:0 22px;border-radius:12px;border:1px solid var(--ln);background:var(--card);color:var(--tx);font-weight:600;transition:.25s}.btn:hover{border-color:var(--ac);box-shadow:0 6px 22px -8px color-mix(in srgb,var(--ac) 55%,transparent)}.btn.pri{background:var(--ac);border-color:var(--ac);color:#fff}[data-theme=dark] .btn.pri{color:#0B1120}
.net{width:100%;height:auto;color:var(--ac);overflow:visible}.net .lines{opacity:.35}.net .nodes circle{fill:var(--card);stroke:var(--ac);stroke-width:2}.net .hub{stroke:var(--ac2);animation:pu 5s ease-in-out infinite}.net .pkt circle{fill:var(--ac2)}.net .term rect{fill:var(--card);stroke:var(--ln)}.net .term path{stroke:var(--ac2);stroke-width:2;opacity:.7}
@keyframes pu{50%{r:14}}
.sec{padding:72px 0}.dgrid,.agrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}.agrid{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.dcard,.acard,.feat,.pgrid>div{background:var(--glass);border:1px solid var(--ln);border-radius:var(--r);padding:26px;box-shadow:var(--sh);transition:transform .25s,border-color .25s,box-shadow .25s}
.dcard{position:relative;display:block;color:var(--tx)}.dcard p{color:var(--tx2);margin:0}.dcard:hover,.acard:hover{transform:translateY(-4px);border-color:var(--c,var(--ac))}
.ico{display:grid;place-items:center;width:48px;height:48px;border-radius:12px;background:color-mix(in srgb,var(--c,var(--ac)) 12%,transparent);color:var(--c,var(--ac));margin-bottom:16px;transition:transform .3s}.ico svg{width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.dcard:hover .ico{transform:translateY(-2px) rotate(-4deg)}
.arr{position:absolute;right:22px;top:24px;color:var(--c);transition:transform .25s}.dcard:hover .arr{transform:translateX(4px)}
.chip{display:inline-block;font-size:.8rem;font-weight:600;color:var(--c,var(--ac));background:color-mix(in srgb,var(--c,var(--ac)) 11%,transparent);padding:3px 10px;border-radius:99px;margin-bottom:12px}
.acard{display:flex;flex-direction:column}.acard h3 a{color:var(--tx)}.acard p{color:var(--tx2);margin:0 0 16px;font-size:.97rem;flex:1}.meta{display:flex;gap:14px;align-items:center;font-size:.85rem;color:var(--tx2)}.more{margin-left:auto;font-weight:600}
.flow{display:flex;align-items:center;margin:28px 0 36px}.flow span{position:relative;flex:1;text-align:center;padding:14px 8px;font-weight:600;background:var(--card);border:1px solid var(--ln);border-radius:12px}.flow span+span{margin-left:28px}.flow span+span:before{content:"";position:absolute;left:-28px;top:50%;width:28px;height:2px;background:linear-gradient(90deg,var(--ac),var(--ac2))}
.pgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}.pgrid p{margin:0;color:var(--tx2)}
.phead{padding:72px 0 24px;background:linear-gradient(180deg,color-mix(in srgb,var(--c,var(--ac)) 8%,transparent),transparent);border-top:3px solid var(--c,transparent)}.phead h1{font-size:clamp(2.2rem,5vw,3.4rem)}.ico.big{width:56px;height:56px}
.feat{margin-bottom:28px;border-left:4px solid var(--c)}.feat h2 a{color:var(--tx)}.feat p{color:var(--tx2);max-width:640px}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}.filters button{font:inherit;font-size:.9rem;padding:6px 14px;border:1px solid var(--ln);background:var(--card);color:var(--tx);border-radius:99px;cursor:pointer;min-height:36px}.filters .on{background:var(--ac);border-color:var(--ac);color:#fff}[data-theme=dark] .filters .on{color:#0B1120}
.art-l{display:grid;grid-template-columns:220px minmax(0,800px);gap:48px;padding-top:56px;padding-bottom:72px}.toc{position:sticky;top:90px;align-self:start;display:flex;flex-direction:column;gap:6px;font-size:.9rem;border-left:2px solid var(--ln);padding-left:16px}.toc a{color:var(--tx2)}.toc a:hover{color:var(--ac)}
.post{max-width:800px}.post h1{font-size:clamp(2rem,4.5vw,2.9rem)}.post section{margin-top:44px}.post h2{padding-top:4px}.pm{color:var(--tx2);font-size:.92rem}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em}p code{background:color-mix(in srgb,var(--ac) 10%,transparent);padding:2px 6px;border-radius:6px}
.code{position:relative;margin:18px 0;background:var(--code);border-radius:12px;border:1px solid var(--ln)}.code pre{margin:0;padding:18px;overflow-x:auto;color:#E2E8F0;font-size:.88rem;line-height:1.6}.lang{position:absolute;left:14px;top:-10px;font-size:.72rem;background:var(--ac);color:#fff;padding:1px 8px;border-radius:6px}[data-theme=dark] .lang{color:#0B1120}
.copy{position:absolute;right:10px;top:8px;font:inherit;font-size:.78rem;background:rgba(255,255,255,.08);color:#CBD5E1;border:1px solid rgba(255,255,255,.16);border-radius:8px;padding:3px 10px;cursor:pointer}.copy:hover{background:rgba(255,255,255,.16)}.code pre{padding-top:36px}
.note{margin:18px 0;padding:14px 18px;border-radius:12px;border-left:4px solid var(--ac2);background:color-mix(in srgb,var(--ac2) 9%,var(--card))}.note.warn{border-color:#D97706;background:color-mix(in srgb,#F59E0B 11%,var(--card))}
.rel{margin-top:64px}.rel .agrid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.ftr{border-top:1px solid var(--ln);padding:56px 0 28px;background:var(--card)}.fgrid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}.fgrid p{color:var(--tx2);max-width:360px}.fgrid h2{font-size:1rem}.fgrid a:not(.brand){display:block;color:var(--tx2);padding:3px 0}.copy-r{margin-top:32px;color:var(--tx2);font-size:.9rem}
.rv{opacity:0;transform:translateY(14px);transition:opacity .7s,transform .7s}.rv.in{opacity:1;transform:none}
@media(max-width:900px){.hgrid{grid-template-columns:1fr}.art{max-width:420px}.art-l{grid-template-columns:1fr}.toc{position:static}.fgrid{grid-template-columns:1fr 1fr}.fgrid>div:first-child{grid-column:1/-1}}
@media(max-width:820px){.burger{display:grid;margin-left:auto}.nav{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;background:var(--bg);border-bottom:1px solid var(--ln);padding:12px 24px 20px;margin:0}.nav.open{display:flex}.nav a{padding:14px 10px;font-size:1.05rem}.flow{flex-direction:column;gap:20px}.flow span{width:100%}.flow span+span{margin:0}.flow span+span:before{left:50%;top:-20px;width:2px;height:20px}}
@media(max-width:480px){body{font-size:16px}.agrid{grid-template-columns:1fr}.hero{padding:120px 0 60px}.btn{width:100%;justify-content:center}}
@media(prefers-reduced-motion:reduce){*,*:before{animation:none!important;transition:none!important;scroll-behavior:auto!important}.rv{opacity:1;transform:none}}