:root{--bg:#fff;--bg-alt:#f6f7fb;--card:#fff;--ink:#111827;--ink-2:#374151;--muted:#6b7280;--line:#e5e7eb;--accent:#4f46e5;--accent-ink:#fff;--accent-soft:#eef2ff;--good:#047857;--warn:#b45309;--bad:#dc2626;--radius:14px;--shadow:0 1px 2px #1118270f, 0 8px 24px #1118270f;--max:1120px;--site-font:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0b1020;--bg-alt:#111827;--card:#131a2c;--ink:#f3f4f6;--ink-2:#d1d5db;--muted:#9ca3af;--line:#253049;--accent:#818cf8;--accent-ink:#0b1020;--accent-soft:#1e1b4b;--good:#34d399;--warn:#fbbf24;--bad:#f87171;--shadow:none}}:root[data-theme=dark]{--bg:#0b1020;--bg-alt:#111827;--card:#131a2c;--ink:#f3f4f6;--ink-2:#d1d5db;--muted:#9ca3af;--line:#253049;--accent:#818cf8;--accent-ink:#0b1020;--accent-soft:#1e1b4b;--good:#34d399;--warn:#fbbf24;--bad:#f87171;--shadow:none}.wrap{max-width:var(--max);box-sizing:border-box;margin:0 auto;padding:0 20px}.skip{position:absolute;left:-999px}.skip:focus{background:var(--card);color:var(--ink);z-index:100;outline:3px solid var(--accent);border-radius:8px;padding:8px 12px;position:fixed;top:12px;left:12px}html{scroll-padding-top:5rem}.site-header :focus-visible,.site-footer :focus-visible,.lang-menu :focus-visible,.skip:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.site-header,.site-footer{font-family:var(--site-font);color:var(--ink);line-height:1.6}.site-header a,.site-footer a{color:inherit}.site-header{z-index:5;background:color-mix(in srgb, var(--bg) 88%, transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);position:sticky;top:0}.header-row{align-items:center;gap:24px;height:64px;display:flex}.brand{align-items:center;gap:10px;font-size:1.15rem;font-weight:700;text-decoration:none;display:inline-flex}.brand img{display:inline-block}.nav{gap:22px;margin-left:12px;display:flex}.site-header .nav a,.site-header .link-quiet{color:var(--ink-2);font-size:.97rem;text-decoration:none}.site-header .nav a:hover,.site-header .link-quiet:hover{color:var(--accent)}.header-actions{align-items:center;gap:16px;margin-left:auto;display:flex}@media (width<=760px){.nav{display:none}.header-actions{gap:12px}.header-actions .btn{padding:8px 12px;font-size:.9rem}}.lang-menu{flex:none;position:relative}.lang-menu summary{border:1px solid var(--line);cursor:pointer;min-height:36px;color:var(--ink-2);font-family:var(--site-font);white-space:nowrap;border-radius:10px;align-items:center;gap:6px;padding:4px 8px;font-size:.93rem;font-weight:600;line-height:1.2;list-style:none;display:inline-flex}.lang-menu summary::-webkit-details-marker{display:none}.lang-menu summary:hover,.lang-menu[open] summary{border-color:var(--accent);color:var(--accent)}.flag{vertical-align:middle;border-radius:2px;flex:none;width:20px;height:14px;display:inline-block;box-shadow:0 0 0 1px #1118272e}.lang-menu-code{display:none}.lang-menu-chevron{flex:none;transition:transform .15s}.lang-menu[open] .lang-menu-chevron{transform:rotate(180deg)}.lang-menu-list{z-index:6;background:var(--card);border:1px solid var(--line);border-radius:12px;min-width:11rem;max-width:calc(100vw - 32px);margin:0;padding:6px;list-style:none;position:absolute;top:calc(100% + 6px);right:0;box-shadow:0 8px 24px #1118272e}.lang-menu-list li{margin:0}.lang-menu-list a,.lang-menu-list button{box-sizing:border-box;width:100%;min-height:24px;color:var(--ink-2);font:inherit;font-family:var(--site-font);text-align:start;cursor:pointer;background:0 0;border:0;border-radius:8px;align-items:center;gap:10px;padding:8px 12px;font-size:.97rem;line-height:1.4;text-decoration:none;display:flex}.lang-menu-list a:hover,.lang-menu-list button:hover{background:var(--accent-soft);color:var(--ink)}.lang-menu-list [aria-current]{color:var(--ink);font-weight:700}.lang-menu-list [aria-current]:after{content:" ✓";color:var(--accent)}@media (width<=420px){.header-row{flex-wrap:wrap;gap:6px 12px;height:auto;min-height:64px;padding-top:8px;padding-bottom:8px}.header-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px 10px;min-width:0}.lang-menu-name{display:none}.lang-menu-code{display:inline}.site-header .link-quiet,.header-actions .btn{text-align:center;line-height:1.25}.header-actions .btn{padding:7px 10px}}.site-footer{border-top:1px solid var(--line);background:var(--bg-alt);margin-top:48px;padding:48px 0 24px;font-size:.95rem}.footer-grid{grid-template-columns:2fr repeat(4,1fr);gap:32px;display:grid}.footer-grid nav{flex-direction:column;gap:8px;display:flex}.footer-grid>*{min-width:0}.footer-grid a,.footer-grid h2{overflow-wrap:break-word;-webkit-hyphens:auto;hyphens:auto}.footer-grid h2{text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 6px;font-size:.8rem;font-weight:700}.site-footer .footer-grid a{color:var(--ink-2);text-decoration:none}.site-footer .footer-grid a:hover{color:var(--accent)}.footer-brand p{color:var(--muted);max-width:32ch;margin:1em 0}.footer-legal{color:var(--muted);margin-top:32px;font-size:.85rem}.footer-legal p{margin:0}.footer-langs{margin-top:32px}.langs{flex-wrap:wrap;align-items:center;gap:4px 18px;display:flex}.langs-icon{color:var(--muted);flex:none}.site-footer .langs a{font-family:var(--site-font);color:var(--ink-2);min-height:24px;padding:2px 0;text-decoration:none;display:inline-block}.site-footer .langs a:hover{color:var(--accent);text-decoration:underline}.site-footer .langs a[aria-current]{color:var(--ink);font-weight:700}:lang(hi){--site-font:system-ui, "Nirmala UI", "Kohinoor Devanagari", "Noto Sans Devanagari", Mangal, sans-serif}:lang(zh-Hans){--site-font:system-ui, -apple-system, "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans SC", sans-serif}:lang(ja){--site-font:system-ui, -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, "Noto Sans CJK JP", "Noto Sans JP", sans-serif}@media (width<=860px){.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}.btn{border:1px solid #0000;border-radius:10px;padding:10px 18px;font-size:.97rem;font-weight:600;line-height:1.6;text-decoration:none;display:inline-block}.btn-lg{padding:14px 24px;font-size:1.05rem}.site-header .btn-primary,.btn-primary{background:var(--accent);color:var(--accent-ink)}.btn-primary:hover{filter:brightness(1.08)}.btn-ghost{border-color:var(--line);color:var(--ink);background:var(--card)}.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}