:root{--primary:#0b63ce;--primary2:#084a9a;--bg:#ffffff;--muted:#f3f7ff;--text:#0f172a;--sub:#334155;--border:#dbeafe;--r:18px;--shadow:0 12px 30px rgba(2,8,23,.10);--shadow2:0 6px 16px rgba(2,8,23,.08)}
*{box-sizing:border-box}html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,Noto Sans,sans-serif;color:var(--text);background:var(--bg)}
a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.skip{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip:focus{left:16px;top:16px;width:auto;height:auto;background:#fff;border:2px solid var(--primary);padding:10px 12px;border-radius:12px;z-index:1000}
header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
.logo{display:flex;flex-direction:column;line-height:1.1}
.logo b{font-size:18px}.logo span{font-size:12.5px;color:var(--sub)}
.menu{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.menu a{padding:8px 10px;border-radius:12px;color:var(--text)}
.menu a.active,.menu a:hover{background:var(--muted);text-decoration:none}
.burger{display:none}
@media(max-width:860px){
  .burger{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;border:1px solid var(--border);background:#fff}
  .menu{display:none;position:absolute;right:16px;top:64px;flex-direction:column;background:#fff;border:1px solid var(--border);border-radius:14px;padding:10px;width:calc(100% - 32px);box-shadow:var(--shadow)}
  .menu.open{display:flex}
}
.hero{padding:56px 0 28px;background:radial-gradient(1200px 420px at 20% -10%, rgba(11,99,206,.18), transparent 60%),radial-gradient(900px 380px at 90% 0%, rgba(8,74,154,.16), transparent 55%),linear-gradient(180deg, rgba(243,247,255,.9), rgba(255,255,255,1));border-bottom:1px solid var(--border)}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr}}
.badge{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(11,99,206,.08);border:1px solid rgba(11,99,206,.22);font-size:13px;color:var(--primary2)}
h1{font-size:clamp(28px,3.6vw,44px);margin:12px 0 10px;letter-spacing:-.2px}
.lead{font-size:16.5px;color:var(--sub);line-height:1.65;margin:0 0 18px}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 16px;border-radius:14px;border:1px solid var(--border);background:var(--muted);color:var(--text);box-shadow:0 1px 0 rgba(2,8,23,.04)}
.btn.primary{background:var(--primary);color:#fff;border-color:rgba(11,99,206,.35)}
.btn.primary:hover{background:var(--primary2);text-decoration:none}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow);padding:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:900px){.grid-3{grid-template-columns:1fr}}
.section{padding:30px 0}.section h2{margin:0 0 12px;font-size:24px}
.section p{margin:0 0 12px;color:var(--sub);line-height:1.7}
.list{margin:8px 0 0;padding-left:18px;color:var(--sub);line-height:1.7}
.hr{height:1px;background:var(--border);margin:16px 0}
.footer{border-top:1px solid var(--border);background:#fff;padding:24px 0;color:var(--sub)}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr}}
.small{font-size:13px;color:var(--sub);line-height:1.7}
.floating-cta{position:fixed;right:16px;bottom:16px;z-index:40;display:flex;flex-direction:column;gap:10px}
.floating-cta a{display:inline-flex;align-items:center;justify-content:center;padding:12px 14px;border-radius:999px;background:var(--primary);color:#fff;box-shadow:var(--shadow);border:1px solid rgba(11,99,206,.35);font-weight:700}
.floating-cta a:hover{background:var(--primary2);text-decoration:none}
.post{border:1px solid var(--border);border-radius:var(--r);padding:16px;background:#fff;box-shadow:var(--shadow2)}
.post h3{margin:0 0 6px}.meta{font-size:13px;color:var(--sub);margin-bottom:10px}
table{width:100%;border-collapse:collapse;border:1px solid var(--border);border-radius:12px;overflow:hidden}
th,td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left}
th{background:rgba(243,247,255,.9)}
blockquote{margin:14px 0;padding:12px 14px;border-left:4px solid rgba(11,99,206,.45);background:rgba(243,247,255,.7);border-radius:10px;color:var(--sub)}
.kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;background:rgba(15,23,42,.06);border:1px solid rgba(15,23,42,.12);padding:2px 6px;border-radius:8px}
.notice{border:1px dashed rgba(11,99,206,.45);background:rgba(243,247,255,.6);padding:12px 14px;border-radius:14px;color:var(--sub)}