:root{--lb-space-xxs:4px;--lb-space-xs:8px;--lb-space-sm:12px;--lb-space-md:16px;--lb-space-lg:24px;--lb-space-xl:32px;--lb-space-xxl:48px;--lb-radius-sm:8px;--lb-radius-md:12px;--lb-radius-lg:16px;--lb-radius-xl:24px;--lb-glass-blur:16px;--lb-font-family:"Be Vietnam Pro", "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--lb-type-display:700 3rem/3.5rem var(--lb-font-family);--lb-type-headline:700 1.75rem/2.25rem var(--lb-font-family);--lb-type-title:600 1.25rem/1.75rem var(--lb-font-family);--lb-type-body:400 1rem/1.5rem var(--lb-font-family);--lb-type-body-small:400 .875rem/1.25rem var(--lb-font-family);--lb-type-label:600 .875rem/1.25rem var(--lb-font-family);--lb-type-caption:500 .75rem/1rem var(--lb-font-family);--lb-type-telemetry:600 2rem/2.5rem var(--lb-font-family);--lb-type-telemetry-large:700 3.5rem/4rem var(--lb-font-family);--lb-bp-medium:600px;--lb-bp-expanded:840px;--lb-motion-fast:.12s;--lb-motion-normal:.2s;--lb-motion-slow:.32s;--lb-motion-splash:.9s}:root,[data-theme=light]{--lb-color-primary:#00e5ff;--lb-color-primary-deep:#1a56db;--lb-color-secondary:#2962ff;--lb-color-accent:#ff6d00;--lb-color-accent-strong:#b94a00;--lb-color-bg:#f8fafc;--lb-color-surface:#f0f4f8;--lb-color-surface-raised:#fff;--lb-color-outline:#cbd5e1;--lb-color-outline-strong:#64748b;--lb-color-text:#0b1220;--lb-color-text-muted:#475569;--lb-color-on-primary:#0b1220;--lb-color-on-primary-deep:#fff;--lb-color-on-accent:#0b1220;--lb-color-danger:#e53935;--lb-color-danger-strong:#c62828;--lb-color-on-danger:#fff;--lb-color-warning:#ffb300;--lb-color-warning-strong:#8a5a00;--lb-color-on-warning:#0b1220;--lb-color-success:#00c853;--lb-color-success-strong:#007a34;--lb-color-on-success:#0b1220;--lb-color-scrim:#0b122099;--lb-shadow-sm:0px 1px 3px 0px #0b12201f;--lb-shadow-md:0px 4px 12px -2px #0b122026, -2px -2px 8px 0px #ffffffb3;--lb-shadow-lg:0px 12px 32px -6px #0b122033, -4px -4px 16px 0px #fffc;--lb-glass-fill:#ffffffb8;--lb-glass-border:#fff9;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--lb-color-primary:#00e5ff;--lb-color-primary-deep:#4c8dff;--lb-color-secondary:#5c8bff;--lb-color-accent:#ff8a3d;--lb-color-accent-strong:#ff8a3d;--lb-color-bg:#0b1220;--lb-color-surface:#131c2e;--lb-color-surface-raised:#1b2740;--lb-color-outline:#334155;--lb-color-outline-strong:#7c8ba1;--lb-color-text:#e8eef7;--lb-color-text-muted:#94a3b8;--lb-color-on-primary:#0b1220;--lb-color-on-primary-deep:#0b1220;--lb-color-on-accent:#0b1220;--lb-color-danger:#ff6b66;--lb-color-danger-strong:#ff6b66;--lb-color-on-danger:#0b1220;--lb-color-warning:#ffca4d;--lb-color-warning-strong:#ffca4d;--lb-color-on-warning:#0b1220;--lb-color-success:#3ddc84;--lb-color-success-strong:#3ddc84;--lb-color-on-success:#0b1220;--lb-color-scrim:#000000b3;--lb-shadow-sm:0px 1px 3px 0px #0006;--lb-shadow-md:0px 4px 12px -2px #00000080, -1px -1px 6px 0px #ffffff14;--lb-shadow-lg:0px 12px 32px -6px #0009, -2px -2px 12px 0px #ffffff1a;--lb-glass-fill:#131c2e99;--lb-glass-border:#fff3;color-scheme:dark}}[data-theme=dark]{--lb-color-primary:#00e5ff;--lb-color-primary-deep:#4c8dff;--lb-color-secondary:#5c8bff;--lb-color-accent:#ff8a3d;--lb-color-accent-strong:#ff8a3d;--lb-color-bg:#0b1220;--lb-color-surface:#131c2e;--lb-color-surface-raised:#1b2740;--lb-color-outline:#334155;--lb-color-outline-strong:#7c8ba1;--lb-color-text:#e8eef7;--lb-color-text-muted:#94a3b8;--lb-color-on-primary:#0b1220;--lb-color-on-primary-deep:#0b1220;--lb-color-on-accent:#0b1220;--lb-color-danger:#ff6b66;--lb-color-danger-strong:#ff6b66;--lb-color-on-danger:#0b1220;--lb-color-warning:#ffca4d;--lb-color-warning-strong:#ffca4d;--lb-color-on-warning:#0b1220;--lb-color-success:#3ddc84;--lb-color-success-strong:#3ddc84;--lb-color-on-success:#0b1220;--lb-color-scrim:#000000b3;--lb-shadow-sm:0px 1px 3px 0px #0006;--lb-shadow-md:0px 4px 12px -2px #00000080, -1px -1px 6px 0px #ffffff14;--lb-shadow-lg:0px 12px 32px -6px #0009, -2px -2px 12px 0px #ffffff1a;--lb-glass-fill:#131c2e99;--lb-glass-border:#fff3;color-scheme:dark}.lb-tabular{font-variant-numeric:tabular-nums}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/be-vietnam-pro-regular.woff2)format("woff2")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/be-vietnam-pro-semibold.woff2)format("woff2")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/be-vietnam-pro-bold.woff2)format("woff2")}:root{--rong:1120px;--le:max(16px, calc((100% - var(--rong)) / 2));--nen-hero:radial-gradient(1200px 600px at 85% -10%, #00e5ff2e, transparent 60%), radial-gradient(900px 500px at -10% 20%, #2962ff24, transparent 60%);--vien:1px solid var(--lb-color-outline)}*,:before,:after{box-sizing:border-box}html{color-scheme:light dark;-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:80px}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}body{background:var(--lb-color-bg);min-height:100dvh;color:var(--lb-color-text);font:var(--lb-type-body);text-rendering:optimizelegibility;flex-direction:column;margin:0;display:flex;overflow-x:hidden}main{flex:1}h1,h2,h3,p{margin:0}h2{font:var(--lb-type-headline);letter-spacing:-.01em}h3{font:var(--lb-type-title)}a{color:var(--lb-color-primary-deep);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--lb-color-secondary);outline-offset:3px;border-radius:4px}img,svg{max-width:100%;display:block}code,.ma{overflow-wrap:anywhere;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.875em}.khung{width:100%;padding-inline:var(--le)}.vung{padding-block:clamp(48px,8vw,96px)}.vung-phu{background:var(--lb-color-surface)}.dau-vung{gap:var(--lb-space-sm);max-width:44rem;margin-bottom:var(--lb-space-xl);display:grid}.dau-vung p{color:var(--lb-color-text-muted)}.nhan-nho{align-items:center;gap:var(--lb-space-xs);background:var(--lb-color-surface-raised);border:var(--vien);width:fit-content;color:var(--lb-color-primary-deep);font:var(--lb-type-label);border-radius:999px;padding:4px 12px;display:inline-flex}.cham{background:var(--lb-color-success);border-radius:50%;width:8px;height:8px}.nut{justify-content:center;align-items:center;gap:var(--lb-space-xs);border-radius:var(--lb-radius-md);min-height:48px;font:var(--lb-type-label);transition:transform var(--lb-motion-fast) ease, box-shadow var(--lb-motion-normal) ease, background var(--lb-motion-normal) ease;border:1px solid #0000;padding:12px 22px;font-size:1rem;text-decoration:none;display:inline-flex}.nut:hover{text-decoration:none;transform:translateY(-1px)}.nut-chinh{background:var(--lb-color-primary-deep);color:var(--lb-color-on-primary-deep);box-shadow:var(--lb-shadow-md)}.nut-chinh:hover{box-shadow:var(--lb-shadow-lg)}.nut-phu{background:var(--lb-color-surface-raised);color:var(--lb-color-text);border-color:var(--lb-color-outline)}.nut-tat{color:var(--lb-color-text-muted);border:1px dashed var(--lb-color-outline-strong);cursor:default;background:0 0}.nut-tat:hover{transform:none}.nut svg{width:20px;height:20px}.the{background:var(--lb-color-surface-raised);border:var(--vien);border-radius:var(--lb-radius-lg);padding:var(--lb-space-lg);box-shadow:var(--lb-shadow-sm)}.luoi{gap:var(--lb-space-md);grid-template-columns:repeat(auto-fill,minmax(min(100%,250px),1fr));display:grid}.o-icon{border-radius:var(--lb-radius-md);width:48px;height:48px;color:var(--lb-color-primary-deep);background:linear-gradient(135deg,#00e5ff2e,#2962ff2e);flex:none;place-items:center;display:grid}.o-icon svg{width:26px;height:26px}.mo{color:var(--lb-color-text-muted)}.van-ban{gap:var(--lb-space-lg);max-width:46rem;display:grid}.van-ban section{gap:var(--lb-space-xs);display:grid}.van-ban p{color:var(--lb-color-text-muted)}.dau-trang{padding-block:clamp(40px, 7vw, 80px) var(--lb-space-xl);background:var(--nen-hero)}.dau-trang h1{font:var(--lb-type-display);letter-spacing:-.02em;font-size:clamp(2rem,5vw,3rem);line-height:1.15}.dau-trang p{margin-top:var(--lb-space-sm);color:var(--lb-color-text-muted);max-width:44rem}.an-chu{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.bo-qua[data-astro-cid-ioswq4ux]{z-index:20;border-radius:var(--lb-radius-sm);background:var(--lb-color-primary-deep);color:var(--lb-color-on-primary-deep);padding:8px 16px;position:absolute;top:-64px;left:16px}.bo-qua[data-astro-cid-ioswq4ux]:focus{top:8px}.dau[data-astro-cid-ioswq4ux]{z-index:10;justify-content:space-between;align-items:center;gap:var(--lb-space-md);background:var(--lb-glass-fill);min-height:68px;-webkit-backdrop-filter:blur(var(--lb-glass-blur)) saturate(1.4);border-bottom:1px solid var(--lb-color-outline);display:flex;position:sticky;top:0}.thuong-hieu[data-astro-cid-ioswq4ux]{flex:none;display:block}.nav-rong[data-astro-cid-ioswq4ux]{align-items:center;gap:var(--lb-space-lg);display:none}.nav-rong[data-astro-cid-ioswq4ux] a[data-astro-cid-ioswq4ux]:not(.nut){color:var(--lb-color-text);font:var(--lb-type-label);text-decoration:none}.nav-rong[data-astro-cid-ioswq4ux] a[data-astro-cid-ioswq4ux]:not(.nut):hover{color:var(--lb-color-primary-deep)}.doi-ngu[data-astro-cid-ioswq4ux]{border:1px solid var(--lb-color-outline);border-radius:var(--lb-radius-sm);padding:6px 10px}.nut-nho[data-astro-cid-ioswq4ux]{min-height:40px;padding:8px 16px}.menu[data-astro-cid-ioswq4ux] summary[data-astro-cid-ioswq4ux]{border-radius:var(--lb-radius-md);border:1px solid var(--lb-color-outline);cursor:pointer;place-items:center;width:48px;height:48px;list-style:none;display:grid}.menu[data-astro-cid-ioswq4ux] summary[data-astro-cid-ioswq4ux]::-webkit-details-marker{display:none}.gach[data-astro-cid-ioswq4ux],.gach[data-astro-cid-ioswq4ux]:before,.gach[data-astro-cid-ioswq4ux]:after{background:var(--lb-color-text);width:20px;height:2px;transition:transform var(--lb-motion-normal) ease, opacity var(--lb-motion-fast);border-radius:2px;display:block;position:relative}.gach[data-astro-cid-ioswq4ux]:before,.gach[data-astro-cid-ioswq4ux]:after{content:"";position:absolute}.gach[data-astro-cid-ioswq4ux]:before{top:-6px}.gach[data-astro-cid-ioswq4ux]:after{top:6px}.menu[data-astro-cid-ioswq4ux][open] .gach[data-astro-cid-ioswq4ux]{background:0 0}.menu[data-astro-cid-ioswq4ux][open] .gach[data-astro-cid-ioswq4ux]:before{transform:translateY(6px)rotate(45deg)}.menu[data-astro-cid-ioswq4ux][open] .gach[data-astro-cid-ioswq4ux]:after{transform:translateY(-6px)rotate(-45deg)}.nav-hep[data-astro-cid-ioswq4ux]{padding:var(--lb-space-xs) var(--le) var(--lb-space-md);background:var(--lb-color-surface-raised);border-bottom:1px solid var(--lb-color-outline);box-shadow:var(--lb-shadow-md);display:grid;position:absolute;top:100%;left:0;right:0}.nav-hep[data-astro-cid-ioswq4ux] a[data-astro-cid-ioswq4ux]{color:var(--lb-color-text);font:var(--lb-type-label);border-bottom:1px solid var(--lb-color-outline);padding:14px 4px;font-size:1rem;text-decoration:none}.nav-hep[data-astro-cid-ioswq4ux] a[data-astro-cid-ioswq4ux]:last-child{border-bottom:0}@media (width>=840px){.nav-rong[data-astro-cid-ioswq4ux]{display:flex}.menu[data-astro-cid-ioswq4ux]{display:none}}.chan[data-astro-cid-ioswq4ux]{padding-block:var(--lb-space-xxl) var(--lb-space-lg);border-top:1px solid var(--lb-color-outline);background:var(--lb-color-surface);font:var(--lb-type-body-small);margin-top:auto}.chan-tren[data-astro-cid-ioswq4ux]{gap:var(--lb-space-xl);grid-template-columns:1fr;display:grid}@media (width>=600px){.chan-tren[data-astro-cid-ioswq4ux]{grid-template-columns:2fr 1fr 1fr}}.chan-thuong-hieu[data-astro-cid-ioswq4ux]{gap:var(--lb-space-sm);max-width:28rem;display:grid}.chan-cot[data-astro-cid-ioswq4ux]{align-content:start;gap:var(--lb-space-sm);display:grid}.chan-cot[data-astro-cid-ioswq4ux] a[data-astro-cid-ioswq4ux]{color:var(--lb-color-text);text-decoration:none}.chan-cot[data-astro-cid-ioswq4ux] a[data-astro-cid-ioswq4ux]:hover{color:var(--lb-color-primary-deep);text-decoration:underline}.chan-duoi[data-astro-cid-ioswq4ux]{gap:var(--lb-space-xs) var(--lb-space-lg);margin-top:var(--lb-space-xl);padding-top:var(--lb-space-md);border-top:1px solid var(--lb-color-outline);color:var(--lb-color-text-muted);flex-wrap:wrap;display:flex}.chan-duoi[data-astro-cid-ioswq4ux] a[data-astro-cid-ioswq4ux]{color:inherit}