:root{--bg: #fafcfe;--bg-soft: #f0f5fa;--paper: #ffffff;--ink: #16283e;--muted: #5a6b80;--blue: #1b4b8f;--blue-strong: #123a70;--blue-bright: #2e6fd8;--sky: #dce9f7;--line: #d9e4f0;--grid: rgba(27, 75, 143, .055);--radius: 14px;--radius-sm: 8px;--shadow-sm: 0 1px 3px rgba(18, 42, 76, .08), 0 1px 2px rgba(18, 42, 76, .05);--shadow-md: 0 10px 30px rgba(18, 42, 76, .12), 0 3px 8px rgba(18, 42, 76, .06);--font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", ui-monospace, "Consolas", monospace;--nav-h: 72px}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}body{margin:0;font-family:var(--font-sans);font-size:16px;line-height:1.7;color:var(--ink);background-color:var(--bg);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:34px 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h3{font-size:1.02rem;margin-bottom:.25rem}.cert-meta{font-size:.75rem;color:var(--muted);margin:0}.to-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;border:0;background:var(--blue);color:#fff;font-size:1.15rem;display:grid;place-items:center;cursor:pointer;box-shadow:var(--shadow-md);opacity:0;pointer-events:none;transform:translateY(14px);transition:opacity .3s ease,transform .3s ease,background .25s ease;z-index:950}.to-top.visible{opacity:1;pointer-events:auto;transform:translateY(0)}.to-top:hover{background:var(--blue-strong)}.err-page{min-height:calc(100svh - var(--nav-h) - 90px);display:grid;place-items:center;text-align:center;padding-top:calc(var(--nav-h) + 2rem)}.err-code{display:flex;align-items:center;justify-content:center;gap:1.4rem;margin:1.2rem 0 .6rem}.err-code .num{font-size:clamp(5rem,16vw,9rem);font-weight:700;color:var(--blue);line-height:1}.err-code .dim-line{max-width:110px}.err-page h1{font-size:clamp(1.3rem,3.6vw,2rem)}.err-page .err-text{color:var(--muted);max-width:480px;margin-inline:auto}.err-beam{margin:.4rem auto 1.4rem;max-width:420px;width:100%;height:auto}.marquee{overflow:hidden;background:var(--blue-strong);color:#cfe1f8;padding:.85rem 0;position:relative;z-index:2}.marquee-track{display:flex;width:max-content;animation:marquee 32s linear infinite;will-change:transform}.marquee-group{display:flex;align-items:center;gap:2.6rem;padding-right:2.6rem}.marquee-group span{display:inline-flex;align-items:center;gap:2.6rem;white-space:nowrap;font-family:var(--font-mono);font-size:.8rem;font-weight:500;letter-spacing:.16em}.marquee-group .dot{font-style:normal;font-size:.6rem;color:var(--blue-bright)}.marquee:hover .marquee-track{animation-play-state:paused}@keyframes 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