:root{
  --bg:#f7fbff;
  --panel:#ffffff;
  --ink:#122033;
  --muted:#5f6f84;
  --line:#d9e5f1;
  --brand:#0f766e;
  --brand-dark:#0d3f3a;
  --accent:#f59e0b;
  --shadow:0 18px 50px rgba(19,48,79,.10);
  --radius:18px;
  --font:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.65}
a{color:inherit}
.rt-skip{position:fixed;left:20px;top:-70px;z-index:1000;background:#fff;border:1px solid var(--line);padding:10px 14px;border-radius:10px}
.rt-skip:focus{top:18px}
.rt-header{position:sticky;top:0;z-index:50;background:rgba(247,251,255,.92);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
.rt-header__inner{width:min(1120px,calc(100% - 32px));height:72px;margin:0 auto;display:flex;align-items:center;gap:24px}
.rt-brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.rt-brand__mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(145deg,var(--brand),#14b8a6);color:#fff;display:grid;place-items:center;font-weight:900;letter-spacing:-.04em}
.rt-brand span:last-child{display:flex;flex-direction:column;line-height:1.1}
.rt-brand b{font-size:16px}
.rt-brand small{font-size:11px;color:var(--muted);margin-top:5px}
.rt-nav{margin-left:auto;display:flex;align-items:center;gap:20px}
.rt-nav a{font-size:13px;text-decoration:none;color:#344459;font-weight:700}
.rt-nav a:hover{color:var(--brand)}
.rt-language{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--line);border-radius:99px;font-size:12px;font-weight:800;color:var(--brand);background:#fff}
.rt-menu{display:none;margin-left:auto;border:0;background:transparent;padding:10px;align-items:center;gap:4px;color:var(--ink)}
.rt-menu span{display:block;width:20px;height:2px;background:currentColor}
.rt-menu b{font-size:12px;margin-left:5px}
.rt-main{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:42px 0 72px}
.rt-hero{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(330px,.85fr);gap:34px;align-items:center;padding:52px 0 36px}
.rt-eyebrow,.rt-section__head span,.rt-article-block__toc span,.rt-page__hero>span{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--brand);font-weight:900}
.rt-hero h1,.rt-page__hero h1{font-size:clamp(42px,6vw,76px);line-height:.98;letter-spacing:-.06em;margin:12px 0 18px}
.rt-hero p{font-size:19px;color:var(--muted);max-width:680px;margin:0}
.rt-hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.rt-action{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:12px;padding:13px 18px;font-size:14px;font-weight:800;text-decoration:none;cursor:pointer}
.rt-action--dark{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff}
.rt-action.is-copied,.rt-open-box button.is-copied{background:#e7f8f4;color:var(--brand);border-color:#b8e7dc}
.rt-gateway-card{background:var(--panel);border:1px solid var(--line);border-radius:28px;padding:30px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.rt-gateway-card:before{content:"";position:absolute;right:-70px;top:-70px;width:190px;height:190px;border-radius:50%;background:rgba(20,184,166,.12)}
.rt-gateway-card>span{font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);font-weight:900}
.rt-gateway-card strong{display:block;font-size:clamp(42px,6vw,64px);letter-spacing:-.06em;margin:8px 0;color:var(--brand-dark)}
.rt-gateway-card p{margin:0 0 22px;color:var(--muted)}
.rt-gateway-card dl{display:grid;gap:10px;margin:0}
.rt-gateway-card dl div{display:flex;justify-content:space-between;gap:14px;border-top:1px solid var(--line);padding-top:10px}
.rt-gateway-card dt{font-size:12px;color:var(--muted)}
.rt-gateway-card dd{margin:0;font-size:12px;font-weight:800;text-align:right}
.rt-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:18px 0 34px}
.rt-strip div{background:#fff;padding:22px}
.rt-strip span{display:block;color:var(--accent);font-weight:900;font-size:12px}
.rt-strip b{display:block;font-size:16px;margin:5px 0 4px}
.rt-strip small{color:var(--muted);font-size:13px}
.rt-section{margin-top:34px}
.rt-section__head{max-width:720px;margin-bottom:16px}
.rt-section__head h2{font-size:clamp(27px,3vw,38px);line-height:1.08;letter-spacing:-.04em;margin:6px 0 8px}
.rt-section__head p{color:var(--muted);margin:0;max-width:620px}
.rt-check-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.rt-check-grid label{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;display:flex;gap:12px;align-items:flex-start;box-shadow:0 8px 24px rgba(18,32,51,.04)}
.rt-check-grid input{margin-top:5px;accent-color:var(--brand)}
.rt-check-grid b{display:block}
.rt-check-grid small{display:block;color:var(--muted);font-size:12px;line-height:1.45;margin-top:4px}
.rt-ip-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.rt-ip-list a,.rt-guide-grid a,.rt-related-grid a{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;text-decoration:none;display:flex;flex-direction:column;min-height:138px}
.rt-ip-list a:hover,.rt-guide-grid a:hover,.rt-related-grid a:hover{border-color:#8dd8cf;box-shadow:0 10px 28px rgba(15,118,110,.10)}
.rt-ip-list span{font-size:11px;color:var(--accent);font-weight:900}
.rt-ip-list strong{font-size:24px;letter-spacing:-.03em;margin:8px 0 7px;color:var(--brand-dark)}
.rt-ip-list small,.rt-guide-grid span,.rt-related-grid span{color:var(--muted);font-size:13px}
.rt-guide-grid,.rt-related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.rt-guide-grid small,.rt-related-grid small{text-transform:uppercase;letter-spacing:.12em;color:var(--brand);font-size:10px;font-weight:900}
.rt-guide-grid b,.rt-related-grid b{font-size:18px;line-height:1.25;margin:8px 0}
.rt-article-block{display:grid;grid-template-columns:220px minmax(0,1fr);gap:28px;margin-top:38px;align-items:start}
.rt-article-block__toc{position:sticky;top:96px;background:#eef7f6;border:1px solid #cde9e4;border-radius:16px;padding:18px}
.rt-article-block__toc nav,.rt-page__nav nav{display:flex;flex-direction:column;gap:8px;margin-top:12px}
.rt-article-block__toc a,.rt-page__nav a{font-size:13px;text-decoration:none;color:#385069;line-height:1.35}
.rt-article-block__toc a.is-sub,.rt-page__nav a.is-sub{padding-left:12px;font-size:12px}
.rt-prose{background:#fff;border:1px solid var(--line);border-radius:20px;padding:34px;box-shadow:0 10px 32px rgba(18,32,51,.05)}
.rt-prose h2{font-size:30px;line-height:1.15;letter-spacing:-.035em;margin:36px 0 12px}
.rt-prose h2:first-child{margin-top:0}
.rt-prose h3{font-size:21px;margin:26px 0 8px}
.rt-prose p,.rt-prose li{color:#425168}
.rt-prose a{color:var(--brand);font-weight:750}
.rt-prose code{background:#edf6f4;border:1px solid #cde9e4;border-radius:6px;padding:2px 6px;color:var(--brand-dark)}
.rt-prose table{border-collapse:collapse;width:100%;font-size:14px}
.rt-prose th,.rt-prose td{border:1px solid var(--line);padding:10px;text-align:left}
.rt-faq-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.rt-faq-list details{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.rt-faq-list summary{list-style:none;cursor:pointer;padding:16px 18px;display:flex;justify-content:space-between;gap:16px;font-weight:800}
.rt-faq-list summary::-webkit-details-marker{display:none}
.rt-faq-list i{font-style:normal;color:var(--brand)}
.rt-faq-list p{margin:0;padding:0 18px 18px;color:var(--muted);font-size:14px}
.rt-page{max-width:920px;margin:0 auto}
.rt-page__hero{padding:42px 0 24px}
.rt-page__intro{font-size:18px;color:var(--muted);max-width:760px}
.rt-open-box{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;margin-top:22px;box-shadow:0 8px 24px rgba(18,32,51,.05)}
.rt-open-box div{margin-right:auto}
.rt-open-box small{display:block;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.12em}
.rt-open-box strong{font-size:22px}
.rt-open-box a,.rt-open-box button{border:1px solid var(--line);border-radius:10px;padding:10px 13px;text-decoration:none;background:#fff;font-weight:800;font-size:13px;cursor:pointer}
.rt-open-box a{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff}
.rt-page__nav{background:#eef7f6;border:1px solid #cde9e4;border-radius:16px;padding:16px;margin-bottom:16px}
.rt-page__nav>span{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--brand);font-weight:900}
.rt-page__nav nav{display:grid;grid-template-columns:repeat(2,1fr)}
.rt-page-section{margin-top:26px}
.rt-page-section h2{font-size:28px;letter-spacing:-.035em}
.rt-footer{border-top:1px solid var(--line);background:#fff}
.rt-footer__inner{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:26px 0;display:grid;grid-template-columns:1fr auto;gap:12px;color:var(--muted)}
.rt-footer b{display:block;color:var(--ink)}
.rt-footer span,.rt-footer small{font-size:13px}
.rt-footer nav{display:flex;gap:16px;flex-wrap:wrap}
.rt-footer a{font-size:13px;text-decoration:none;color:#3d4d63;font-weight:700}
.rt-footer small{grid-column:1/-1}
@media(max-width:860px){
  .rt-header__inner{height:64px}
  .rt-menu{display:flex}
  .rt-language{display:none}
  .rt-nav{position:absolute;left:16px;right:16px;top:70px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px;display:none;flex-direction:column;align-items:stretch;box-shadow:var(--shadow)}
  .rt-header.is-open .rt-nav{display:flex}
  .rt-nav a{padding:10px 12px}
  .rt-hero,.rt-article-block{grid-template-columns:1fr}
  .rt-strip,.rt-check-grid,.rt-ip-list,.rt-guide-grid,.rt-related-grid{grid-template-columns:1fr 1fr}
  .rt-article-block__toc{position:static}
}
@media(max-width:560px){
  .rt-main{width:calc(100% - 24px);padding-top:24px}
  .rt-hero{padding-top:22px}
  .rt-hero h1,.rt-page__hero h1{font-size:40px}
  .rt-hero p,.rt-page__intro{font-size:15px}
  .rt-strip,.rt-check-grid,.rt-ip-list,.rt-guide-grid,.rt-related-grid,.rt-faq-list,.rt-page__nav nav{grid-template-columns:1fr}
  .rt-gateway-card,.rt-prose{padding:22px;border-radius:16px}
  .rt-footer__inner{display:flex;flex-direction:column}
}