:root{--primary: #1f6fb2;--primary-dark: #175a90;--accent: #c0303a;--ink: #1f2d3d;--text: #41505e;--muted: #6a7783;--line: #e4e8ed;--line-2: #d6dee6;--bg: #ffffff;--soft: #f4f8fb;--soft-2: #fafbfc;--footer-bg: #f1f1f1;--font-body: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*,*::before,*::after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;font-family:var(--font-body);font-size:16.5px;line-height:1.68;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}img{max-width:100%;height:auto}a{color:var(--primary);text-decoration:none;transition:color .2s ease}a:hover{color:var(--primary-dark);text-decoration:underline}h1,h2,h3,h4{color:var(--ink);font-weight:700;line-height:1.22;letter-spacing:-0.014em}.container{max-width:1140px;margin:0 auto;padding:0 20px}.section-padding{padding:56px 0 72px}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:12px;top:12px;z-index:100;background:#fff;padding:8px 14px;border:1px solid var(--line);border-radius:6px}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.site-header{position:sticky;top:0;z-index:50;background:#fff;box-shadow:0 3px 6px rgba(0,0,0,0.07)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:13px 0}.site-info{display:flex;align-items:center;gap:13px;min-width:0}.site-logo img{width:44px;height:44px;display:block}.site-name{font-size:1.3rem;font-weight:700;color:var(--ink);line-height:1.15}.site-name b{color:var(--primary);font-weight:700}.site-tagline{margin:2px 0 0;font-size:.78rem;color:var(--muted)}.site-nav{display:flex;align-items:center;gap:1.5rem}.site-nav a{color:var(--ink);font-weight:500;font-size:.98rem}.site-nav a:hover{color:var(--primary);text-decoration:none}.site-nav a[aria-current="page"]{color:var(--primary);border-bottom:2px solid var(--accent);padding-bottom:3px}.nav-toggle{display:none;background:none;border:0;padding:8px;margin:-8px -8px -8px 0;cursor:pointer;color:var(--ink)}.nav-toggle svg{display:block}.doc{display:flex;gap:56px;justify-content:center}.doc-toc{flex:0 0 230px}.doc-main{flex:1 1 700px;max-width:720px;min-width:0}.toc-wrap{position:sticky;top:92px}.toc-title{margin:0 0 14px;font-size:.76rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}.toc-list ol{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}.toc-list li{margin:0;line-height:1.35}.toc-list a{display:block;padding:7px 0 7px 16px;margin-left:-2px;border-left:2px solid transparent;color:#5b6775;font-size:.92rem}.toc-list a:hover{color:var(--primary);text-decoration:none}.toc-list a.active{color:var(--primary);font-weight:600;border-left-color:var(--primary)}.content>*:first-child{margin-top:0}.content h1{font-size:2.5rem;font-weight:800;line-height:1.12;letter-spacing:-0.03em;margin:0 0 1.1rem}.content h2{font-size:1.6rem;font-weight:700;letter-spacing:-0.02em;margin:2.7rem 0 1.05rem;padding-bottom:.45rem;border-bottom:1px solid var(--line);scroll-margin-top:88px}.content h3{font-size:1.2rem;margin:1.7rem 0 .5rem;letter-spacing:-0.015em;scroll-margin-top:88px}.content p{margin:0 0 1.05rem}.content ul,.content ol{margin:0 0 1.05rem;padding-left:1.4rem}.content li{margin:.4rem 0}.content ul li{list-style:disc}.content li::marker{color:var(--primary)}.content strong{color:var(--ink)}.content hr{border:0;border-top:1px solid var(--line);margin:2.2rem 0}.content code{font-family:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;font-size:.88em;background:#eef2f6;color:#b03050;padding:.12em .4em;border-radius:4px}.content pre{background:#f6f8fa;border:1px solid var(--line);border-radius:8px;padding:14px 16px;margin:0 0 1.05rem;overflow-x:auto;font-size:.82rem;line-height:1.5}.content pre code{background:none;color:inherit;padding:0;font-size:inherit;border-radius:0}.content figure{margin:1.5rem 0}.content figure img{border:1px solid var(--line);border-radius:8px;display:block}.content figcaption{color:var(--muted);font-size:.86rem;margin-top:.55rem}.lead-box{margin:0 0 26px;padding:16px 20px;border-left:4px solid var(--primary);border-radius:0 6px 6px 0;background:var(--soft);color:#3d4b57;font-size:1.06rem;line-height:1.6}.lead-box strong{color:var(--ink)}.buttons{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 22px}.btn{display:inline-block;padding:9px 16px;border-radius:6px;background:var(--primary);color:#fff;font-weight:600;font-size:.95rem}.btn:hover{background:var(--primary-dark);color:#fff;text-decoration:none}.btn.secondary{background:#fff;color:var(--primary);border:1px solid var(--line-2)}.btn.secondary:hover{background:var(--soft);color:var(--primary)}.date-list li,.update-list li{margin-bottom:.55rem}.tag-next{display:inline-block;margin-left:.4rem;color:var(--accent);font-weight:700;font-size:.72rem;letter-spacing:.04em;text-transform:uppercase}.date-link{display:inline-block;margin-left:.4rem;font-weight:700;font-size:.72rem;letter-spacing:.04em;text-transform:uppercase}.content table{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;margin:1.5rem 0;font-size:.95rem}.content thead th{background:var(--soft);color:var(--ink);font-weight:700;text-align:left}.content th,.content td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}.content tbody tr:last-child td{border-bottom:0}.content tbody tr:nth-child(even){background:var(--soft-2)}.content td:first-child{white-space:nowrap}.faq-item{margin:12px 0;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 3px 12px rgba(0,0,0,0.04)}.faq-item summary{padding:14px 18px;color:var(--ink);cursor:pointer;font-weight:700;line-height:1.4}.faq-item summary:hover{color:var(--primary)}.faq-item .faq-body{margin:0 18px 16px}.faq-item .faq-body p{margin:0}.org-grid{list-style:none;padding:0;margin:1.5rem 0 0;display:grid;grid-template-columns:repeat(auto-fill, minmax(150px, 1fr));gap:1.7rem 1rem}.org-grid li{margin:0;text-align:center;list-style:none}.org-grid img{width:96px;height:96px;border-radius:50%;object-fit:cover;background:var(--soft);border:1px solid var(--line)}.org-name{font-weight:600;font-size:.95rem;margin:.6rem 0 .1rem}.org-affil{color:var(--muted);font-size:.82rem;margin:0;line-height:1.4}.site-footer{background:var(--footer-bg);padding:50px 0;text-align:center;color:var(--muted)}.site-footer .f-name{font-size:1.15rem;font-weight:700;color:var(--ink)}.site-footer p{margin:6px 0}.site-footer a{color:var(--ink)}.site-footer a:hover{color:var(--primary)}#back-to-top{position:fixed;right:18px;bottom:22px;width:42px;height:42px;border-radius:50%;background:var(--primary);color:#fff;display:none;align-items:center;justify-content:center;z-index:60;box-shadow:0 6px 16px rgba(0,0,0,0.2)}#back-to-top.show{display:flex}#back-to-top:hover{background:var(--primary-dark);color:#fff;transform:translateY(-3px);text-decoration:none}@media (max-width: 900px){.doc{display:block}.doc-toc{display:none}.doc-main{max-width:none}.nav-toggle{display:block}.site-tagline{display:none}.site-nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-top:1px solid var(--line);box-shadow:0 8px 16px rgba(0,0,0,0.08);padding:.3rem 20px 1rem}.site-nav.open{display:flex}.site-nav a{padding:.7rem 0;border-bottom:1px solid var(--line)}.site-nav a:last-child{border-bottom:0}.site-nav a[aria-current="page"]{border-bottom:1px solid var(--line);padding-bottom:.7rem}.content h1{font-size:1.9rem}.content h2{font-size:1.4rem}}