:root{--ink: #1f2933;--ink-soft: #52606d;--brand: #106ba0;--brand-dark: #0b5482;--mist: #e8f1f8;--paper: #ffffff;--wash: #f4f7f8;--line: #d7e0e3;--news: #0b5482;--serif: "Newsreader", Georgia, serif;--sans: "Public Sans", -apple-system, "Segoe UI", sans-serif;--wrap: 1160px}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 var(--sans);overflow-wrap:break-word}img{max-width:100%;height:auto;display:block}a{color:var(--brand)}a:hover{color:var(--brand-dark)}:focus-visible{outline:3px solid var(--news);outline-offset:2px}h1,h2,h3{font-family:var(--serif);line-height:1.15;margin:0 0 .5em;font-weight:600}h1{font-size:clamp(2.1rem,5vw,3.6rem);letter-spacing:-.01em}h2{font-size:clamp(1.6rem,3.2vw,2.3rem)}h3{font-size:1.3rem}p{margin:0 0 1em}.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}.section{padding:64px 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a[aria-current]{font-weight:700;color:var(--brand)}.topbar-links{display:flex;align-items:center}html[lang=zh-CN]{--serif: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;--sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif}html[lang=ar]{--serif: "Geeza Pro", "Segoe UI", "Noto Naskh Arabic", Tahoma, sans-serif;--sans: "Geeza Pro", "Segoe UI", "Noto Sans Arabic", Tahoma, sans-serif}html[lang=ar] body{line-height:1.8}@media(min-width:1201px){html:is([lang=ru],[lang=fr],[lang=es]) .nav ul{gap:14px}html:is([lang=ru],[lang=fr],[lang=es]) .nav a{font-size:.95rem}html:is([lang=ru],[lang=fr],[lang=es]) .nav .btn{padding:12px 18px}}html[lang=zh-CN] :is(h1,h2){word-break:keep-all;overflow-wrap:anywhere}