:root{--bg:#f6f7f9;--panel:#fff;--text:#17191c;--muted:#6b7280;--line:#e5e7eb;--soft:#f3f4f6;--blue:#2457d6}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:92px}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.65}
a{color:inherit;text-decoration:none}.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:20px;min-height:68px;padding:10px 28px;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.brand{font-weight:800;letter-spacing:-.025em;white-space:nowrap}.brand span{font-weight:600;color:var(--muted)}
.menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:9px;padding:7px 10px;font-size:19px}
.search-wrap{position:relative;width:min(520px,100%);margin-left:auto}.search-wrap input{width:100%;height:44px;border:1px solid var(--line);border-radius:11px;padding:0 14px;font:inherit;outline:none;background:#fff}.search-wrap input:focus{border-color:#9ca3af;box-shadow:0 0 0 3px rgba(36,87,214,.08)}
.search-results{position:absolute;left:0;right:0;top:51px;max-height:min(520px,70vh);overflow:auto;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 18px 50px rgba(0,0,0,.14);padding:7px;z-index:80}
.search-empty{padding:18px;color:var(--muted);font-size:14px}.search-result{display:block;padding:12px;border-radius:9px}.search-result:hover,.search-result.is-selected{background:var(--soft)}.search-result strong{display:block;font-size:14px}.search-result small{display:block;color:var(--blue);font-weight:650;margin:2px 0}.search-result p{margin:3px 0 0;color:var(--muted);font-size:13px;line-height:1.45}
.layout{display:grid;grid-template-columns:255px minmax(0,820px) 215px;gap:34px;max-width:1380px;margin:0 auto;padding:32px 28px 64px}
.sidebar,.toc{position:sticky;top:94px;align-self:start;max-height:calc(100vh - 116px);overflow:auto}.nav-group{margin-bottom:20px}.nav-group h3{margin:0 0 6px;color:#8a9099;font-size:11px;letter-spacing:.09em;text-transform:uppercase}.nav-link{display:block;padding:7px 9px;border-radius:8px;color:#4d535b;font-size:14px}.nav-link:hover,.nav-link.active{background:#e9ebef;color:#111;font-weight:650}
.content{min-width:0;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:46px 54px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:20px}h1{font-size:40px;line-height:1.08;letter-spacing:-.04em;margin:0 0 14px}h2{font-size:24px;line-height:1.25;letter-spacing:-.02em;margin:42px 0 13px}p{margin:0 0 16px}.lead{font-size:19px;color:#555c66;margin-bottom:28px}ul,ol{padding-left:24px}li{margin:7px 0}
.note,.warning,.success{margin:22px 0;padding:16px 18px;border:1px solid var(--line);border-radius:11px}.note{background:#f8fafc}.warning{background:#fff9ed}.success{background:#f1faf5}.note strong,.warning strong,.success strong{display:block;margin-bottom:3px}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:20px 0}.card{display:block;border:1px solid var(--line);border-radius:12px;padding:18px;background:#fff}.card:hover{border-color:#b8bec7;transform:translateY(-1px)}.card strong{display:block;margin-bottom:5px}.card span{display:block;color:var(--muted);font-size:14px}
.shot{min-height:210px;margin:22px 0;border:1px dashed #c7cbd1;border-radius:12px;background:#fafafa;display:grid;place-items:center;text-align:center;color:#8a9099;padding:30px}.toc strong{display:block;font-size:13px;margin-bottom:9px}.toc a{display:block;padding:5px 0;color:var(--muted);font-size:13px}.toc a:hover{color:#111}footer{margin-top:46px;padding-top:22px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}.scrim{display:none}
@media(max-width:1080px){.layout{grid-template-columns:225px minmax(0,1fr)}.toc{display:none}}
@media(max-width:760px){html{scroll-padding-top:132px}.topbar{padding:10px 14px;gap:11px;flex-wrap:wrap}.menu-btn{display:block}.brand{flex:1}.search-wrap{order:3;flex-basis:100%;width:100%;margin-left:0}.search-results{position:fixed;left:12px;right:12px;top:116px}.layout{display:block;padding:16px 12px 40px}.content{padding:28px 21px;border-radius:12px}h1{font-size:33px}.cards{grid-template-columns:1fr}.sidebar{display:none;position:fixed;z-index:100;left:0;top:0;bottom:0;width:292px;max-height:none;background:#fff;padding:24px;box-shadow:0 0 36px rgba(0,0,0,.18)}.sidebar.open{display:block}.scrim.show{display:block;position:fixed;inset:0;background:rgba(0,0,0,.28);z-index:90}}

.lang-switch{display:flex;align-items:center;gap:6px;font-size:13px;font-weight:700;color:var(--muted)}
.lang-link{padding:4px 6px;border-radius:6px}
.lang-link:hover{background:var(--soft);color:var(--text)}
.lang-link.active-lang{color:var(--blue)}
@media(max-width:760px){.lang-switch{margin-left:auto}.search-wrap{order:4}}
.lang-picker{
  display:none !important;
}

.guide-back-site{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:38px;
  padding:7px 11px;
  border:1px solid var(--line);
  border-radius:9px;
  background:#fff;
  color:#4d535b;
  font-size:13px;
  font-weight:700;
  line-height:1;
  white-space:nowrap;
}
.guide-back-site:hover{
  background:var(--soft);
  color:var(--text);
  border-color:#c7cbd1;
}
@media(max-width:760px){
  .guide-back-site{
    min-height:36px;
    padding:7px 9px;
    font-size:12px;
  }
}