/* Shared chrome copied from about.css (nav, buttons, footer) + the «Полезное» section. */
img{height:auto}
@font-face{font-family:'Inter';font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/fonts/inter-cyrillic-wght-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Inter';font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/fonts/inter-latin-ext-wght-normal.woff2) format('woff2');unicode-range:U+0100-02AF,U+0304,U+0308,U+0329,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';font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/fonts/inter-latin-wght-normal.woff2) format('woff2');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+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
:root{--bg:#FFFFFF;--bg2:#F6F5F3;--bg3:#EFEDEA;--ink:#121212;--ink2:#2B2B2B;--muted:#6E6B68;--line:rgba(18,18,18,.08);
 --red:#E3262B;--red2:#FF4B3E;--red3:#B5161B;--redbg:#FFF0EE;--green:#16A34A;--gbg:#E8F7EE;--amber:#D97706;--abg:#FFF4E0;--blue:#2563EB;--bbg:#EAF1FF;
 --d:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Inter","Helvetica Neue",Arial,sans-serif;--f:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Inter","Helvetica Neue",Arial,sans-serif;--m:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Inter","Helvetica Neue",Arial,sans-serif;--r:28px;--ease:cubic-bezier(.22,.8,.24,1)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.55 var(--f);overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit}
img,svg{display:block}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--m)}
h1,h2,h3{font-family:var(--d);letter-spacing:-.035em;margin:0;font-weight:600}
h2{font-size:clamp(30px,4.2vw,58px);line-height:1.03}
h2 em,h1 em{font-style:normal;color:var(--red)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font:600 12px var(--m);letter-spacing:.14em;text-transform:uppercase;color:var(--red)}
.eyebrow:before{content:"";width:22px;height:2px;background:currentColor;border-radius:2px}
.sub{color:var(--muted);font-size:clamp(16px,1.4vw,19px);max-width:56ch}
section{position:relative}
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:16px 26px;border-radius:999px;font:600 16px var(--f);text-decoration:none;border:0;cursor:pointer;transition:transform .3s var(--ease),box-shadow .3s,background .3s;white-space:nowrap;will-change:transform}
.btn.r{color:#fff;background:linear-gradient(135deg,var(--red2),var(--red) 55%,var(--red3));box-shadow:0 18px 36px -14px rgba(227,38,43,.65),inset 0 1px 0 rgba(255,255,255,.3)}
.btn.r:hover{box-shadow:0 22px 44px -12px rgba(227,38,43,.8),inset 0 1px 0 rgba(255,255,255,.3)}
.btn.w{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--line),0 10px 24px -18px rgba(0,0,0,.4)}
.btn.w:hover{box-shadow:inset 0 0 0 1.5px var(--ink)}
.btn svg{transition:transform .3s}
.btn:hover svg{transform:translateX(3px)}
.zl{display:block;height:19px;width:auto}
#prog{position:fixed;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,var(--red2),var(--red));z-index:100}

/* ============ NAV ============ */
.nav{position:fixed;left:0;right:0;top:14px;z-index:90;padding:0 16px;pointer-events:none}
.nav .in{pointer-events:auto;max-width:1240px;margin:0 auto;display:flex;align-items:center;gap:18px;padding:10px 10px 10px 26px;border-radius:999px;background:rgba(255,255,255,.8);backdrop-filter:blur(18px) saturate(1.6);-webkit-backdrop-filter:blur(18px) saturate(1.6);box-shadow:0 0 0 1px var(--line),0 20px 40px -28px rgba(0,0,0,.35);transition:box-shadow .3s}
.logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.logo .pt{display:flex;align-items:center;gap:8px;padding-left:12px;border-left:1px solid var(--line);font:600 10px/1.2 var(--m);letter-spacing:.06em;color:var(--muted)}
.logo .pt img{height:15px;width:auto}
.links{display:flex;gap:2px;margin-left:auto}
.links a{text-decoration:none;font-weight:500;font-size:15px;padding:9px 13px;border-radius:999px;color:var(--ink2);transition:background .2s;white-space:nowrap}
.links a:hover{background:var(--bg2)}
.nr{display:flex;align-items:center;gap:10px}
.tel{text-decoration:none;font:600 15px var(--f);padding:9px 6px;white-space:nowrap}
.lang{display:flex;gap:2px;padding:3px;border-radius:999px;background:var(--bg2)}
.lang a{text-decoration:none;font:600 11px var(--m);border:0;background:none;cursor:pointer;padding:6px 8px;border-radius:999px;color:var(--muted);transition:all .25s}
.lang a.on{background:#fff;color:var(--ink);box-shadow:0 2px 6px -2px rgba(0,0,0,.2)}
.nav .btn{padding:12px 20px;font-size:15px}
.burger{display:none;width:44px;height:44px;border-radius:50%;border:0;background:var(--bg2);cursor:pointer;place-items:center}
.burger i{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:transform .3s}
.burger i:before,.burger i:after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s}
.burger i:before{top:-6px}.burger i:after{top:6px}
.open .burger i{background:transparent}.open .burger i:before{transform:translateY(6px) rotate(45deg)}.open .burger i:after{transform:translateY(-6px) rotate(-45deg)}
.sheet{display:none}
@media (max-width:1180px){.logo .pt{display:none}}
@media (max-width:1080px){.links,.tel,.nr>.lang{display:none}.burger{display:grid}.nav .in{padding:8px 8px 8px 20px}.nr{margin-left:auto}
 .sheet{display:grid;pointer-events:auto;max-width:1240px;margin:8px auto 0;border-radius:26px;background:rgba(255,255,255,.97);box-shadow:0 0 0 1px var(--line),0 30px 60px -30px rgba(0,0,0,.4);padding:0 20px;max-height:0;overflow:hidden;transition:max-height .45s,padding .45s}
 .open .sheet{max-height:600px;padding:10px 20px 18px}
 .sheet>a{text-decoration:none;font:600 20px var(--f);padding:14px 2px;border-bottom:1px solid var(--line)}
 .sheet .lang{display:flex;margin-top:14px;width:max-content}.sheet .lang a{text-decoration:none;font-size:13px;padding:9px 14px}}
@media (max-width:480px){.nav .btn{padding:11px 15px;font-size:14px}}
@media (max-width:1320px){.links a{padding:9px 9px;font-size:14.5px}.nav .in{gap:12px}}
.ntel{display:inline-flex!important;align-items:center;gap:7px;color:var(--ink);font-size:14.5px}.ntel svg{color:var(--red)}.ntel:hover{color:var(--red)}.nav .in{max-width:1560px}.links{margin-left:auto;margin-right:auto}@media (max-width:1800px){.pt>span{display:none}}@media (max-width:1440px){.links a{padding:9px 8px;font-size:14.5px}.nav .in{gap:12px}}@media (max-width:1300px){.ntel span{display:none}.ntel{width:42px;height:42px;justify-content:center;border-radius:50%;background:var(--bg2)}}@media (max-width:1080px){.links a{padding:9px 6px;font-size:13.5px}}
@media (max-width:760px){.ntel{display:none!important}}
footer{padding:40px 0 50px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;padding-top:40px;border-top:1px solid var(--line)}
footer h3{margin:0 0 14px;font:600 12px var(--m);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
footer a{text-decoration:none}
footer a:hover{color:var(--red)}
.fl{display:flex;flex-direction:column;gap:8px;font-size:15px}
.soc{display:flex;gap:10px;margin-top:18px}
.soc a{width:44px;height:44px;border-radius:14px;background:var(--bg2);display:grid;place-items:center;transition:background .2s}
.soc a:hover{background:var(--redbg)}
.copy{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:40px;color:var(--muted);font-size:13px}
.fbig{margin-top:50px;color:var(--bg2)}
.fbig svg{width:100%;height:auto}
@media (max-width:860px){.fgrid{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.fgrid{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}html{scroll-behavior:auto}}

/* ============ BLOG ============ */
.blog{padding:120px 0 40px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;font-size:14px;color:var(--muted);margin-bottom:28px}
.crumbs a{text-decoration:none}.crumbs a:hover{color:var(--red)}
.crumbs i{font-style:normal;opacity:.5}
.crumbs span{color:var(--ink2);max-width:46ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lead{color:var(--muted);font-size:clamp(17px,1.5vw,20px);line-height:1.5;max-width:62ch;margin:18px 0 0}
.blog h1{font-size:clamp(32px,4.6vw,60px);line-height:1.04;margin-top:16px;max-width:22ch;text-wrap:balance}
a.eyebrow{text-decoration:none}

/* listing */
.lhead{margin-bottom:30px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 30px}
.chips a{text-decoration:none;font-weight:600;font-size:15px;padding:10px 16px;border-radius:999px;background:var(--bg2);color:var(--ink2);transition:background .2s,color .2s}
.chips a:hover{background:var(--bg3)}
.chips a.on{background:var(--ink);color:#fff}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{position:relative;display:flex;flex-direction:column;gap:12px;padding:26px 26px 22px;border-radius:24px;background:var(--bg2);text-decoration:none;color:var(--ink);transition:transform .3s var(--ease),box-shadow .3s,background .3s;overflow:hidden}
.card:before{content:"";position:absolute;left:0;top:0;right:0;height:4px;background:var(--cc,var(--red))}
.card:hover{background:#fff;box-shadow:0 0 0 1px var(--line),0 24px 48px -28px rgba(0,0,0,.35);transform:translateY(-3px)}
.card h2,.card h3{font-size:21px;line-height:1.22;letter-spacing:-.02em;font-weight:600;text-wrap:balance}
.card p{margin:0;color:var(--muted);font-size:15px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.ctag{font:600 11.5px var(--m);letter-spacing:.12em;text-transform:uppercase;color:var(--cc,var(--red))}
.cmeta{margin-top:auto;padding-top:6px;font-size:13px;color:var(--muted)}
.c-iiko{--cc:var(--red)}.c-uchet{--cc:var(--green)}.c-zakon{--cc:var(--blue)}.c-servis{--cc:var(--amber)}.c-biznes{--cc:#7C3AED}

/* article */
.ahead{max-width:900px}
.meta{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:22px;font-size:14px;color:var(--muted)}
.meta span:not(:last-child):after{content:"·";margin-left:18px;opacity:.6}
.agrid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:60px;margin-top:44px;align-items:start}
.side{position:sticky;top:100px;display:flex;flex-direction:column;gap:16px}
.toc{border-radius:20px;background:var(--bg2);padding:18px 20px}
.toc summary{font:600 12px var(--m);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);cursor:pointer;list-style:none}
.toc summary::-webkit-details-marker{display:none}
.toc ol{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:2px;max-height:calc(100vh - 360px);overflow:auto}
.toc a{display:block;text-decoration:none;font-size:14.5px;line-height:1.35;padding:6px 0 6px 14px;border-left:2px solid var(--line);color:var(--ink2);transition:color .2s,border-color .2s}
.toc a:hover{color:var(--ink);border-left-color:rgba(18,18,18,.25)}.toc a.on{color:var(--red);font-weight:600;border-left-color:var(--red)}
.sbox{border-radius:20px;padding:20px;background:var(--ink);color:#fff}
.sbox b{font-size:18px}.sbox p{margin:8px 0 16px;font-size:14.5px;color:rgba(255,255,255,.7)}
.sbox .btn{width:100%;padding:13px 18px;font-size:15px}

.prose{font-size:18px;line-height:1.7;color:var(--ink2);max-width:760px;min-width:0;overflow-wrap:break-word}
.prose>*:first-child{margin-top:0}
.prose p{margin:0 0 1.1em}
.prose h2{font-size:clamp(25px,2.6vw,33px);line-height:1.15;color:var(--ink);margin:1.9em 0 .6em;scroll-margin-top:100px}
.prose h3{font-size:clamp(20px,1.9vw,23px);line-height:1.25;color:var(--ink);margin:1.6em 0 .5em;scroll-margin-top:100px;letter-spacing:-.02em}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.3em}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--red);font-weight:600}
.prose a{color:var(--red);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.prose a:hover{color:var(--red3)}
.prose strong{color:var(--ink);font-weight:600}
.prose code{font-size:.9em;background:var(--bg2);padding:2px 6px;border-radius:6px}
.note{margin:1.6em 0;padding:18px 22px;border-radius:18px;background:var(--redbg);border-left:4px solid var(--red)}
.note p{margin:0 0 .6em}.note p:last-child{margin:0}
.tbl{margin:1.5em 0;overflow-x:auto;border-radius:16px;box-shadow:0 0 0 1px var(--line)}
.tbl table{border-collapse:collapse;width:100%;font-size:15.5px;line-height:1.45}
.tbl th{background:var(--bg2);text-align:left;font-weight:600;color:var(--ink)}
.tbl th,.tbl td{padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl tr:last-child td{border-bottom:0}
.afaq,.srcs{margin-top:2.4em}
.afaq h2,.srcs h2{margin-top:0}
.faq{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:16px 36px 16px 0;font-weight:600;color:var(--ink);position:relative;font-size:18px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";position:absolute;right:4px;top:12px;font-size:24px;color:var(--red);transition:transform .2s}
.faq[open] summary:after{transform:rotate(45deg)}
.faq-a p{margin:0 0 16px}
.srcs ol{font-size:15px;line-height:1.5;color:var(--muted)}
.srcs a{color:var(--muted);word-break:break-word}

.cta{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center;margin:70px 0 0;padding:44px;border-radius:32px;background:var(--bg2)}
.cta h2{font-size:clamp(26px,3vw,38px);line-height:1.1;margin-top:12px;max-width:24ch}
.cta p{color:var(--muted);margin:12px 0 0;max-width:58ch}
.ctab{display:flex;flex-direction:column;gap:10px}
.rel{margin-top:70px}
.rel>h2{font-size:clamp(26px,3vw,38px);margin-bottom:24px}

@media (max-width:1080px){.toc summary:after{content:"+";float:right;font-size:18px;line-height:12px;color:var(--red)}.toc[open] summary:after{content:"−"}.agrid{grid-template-columns:minmax(0,1fr);gap:20px;margin-top:30px}.side{position:static;order:-1}.sbox{display:none}.toc{padding:16px 18px}.toc:not([open]) ol{display:none}.toc ol{max-height:none}.grid{grid-template-columns:1fr 1fr}}
@media (max-width:760px){.cta{grid-template-columns:1fr;padding:28px 22px;border-radius:26px}.ctab .btn{width:100%}}
@media (max-width:640px){.blog{padding:96px 0 20px}.wrap{padding:0 16px}.grid{grid-template-columns:1fr}.prose{font-size:17px}.card{padding:22px 20px 18px}.chips{flex-wrap:nowrap;overflow-x:auto;margin:0 -16px 24px;padding:0 16px;scrollbar-width:none}.chips::-webkit-scrollbar{display:none}.chips a{white-space:nowrap}.tbl table{font-size:14px}.tbl th,.tbl td{padding:10px 12px}}

/* «Полезное» took the place of «Поддержка» in the top menu (it stays in the mobile menu); on narrow screens «Внедрение» goes too */
.links a[href$="#podderzhka"]{display:none}.logo .pt>span{display:none}
@media (max-width:1200px){.links a[href$="#vnedrenie"]{display:none}}