:root{--bg:#0c0a09;--bg-header:#110f0d;--surface:#151210;--surface-2:#1d1917;--line:#2f2925;--fg:#fcfbf8;--fg-soft:#fcfbf8e6;--muted:#ada085;--green:#4ade80;--yellow:#f8c630;--red:#ef4343;--on-accent:#0c0a09;--gradient:linear-gradient(to right, #4ade80, #f8c630);--logo-bg:#fcfbf8;--zalo:#0068ff;--font:"Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--fs-h1:clamp(2.25rem, 1.2rem + 4.2vw, 3.75rem);--fs-h2:clamp(1.75rem, 1.05rem + 2.8vw, 3rem);--fs-h3:clamp(1.125rem, 1rem + .5vw, 1.25rem);--fs-lead:clamp(1.0625rem, 1rem + .35vw, 1.25rem);--fs-body:1rem;--fs-small:.875rem;--tracking-tight:-.025em;--container:1200px;--gutter:16px;--section-y:clamp(56px, 8vw, 104px);--radius:.75rem;--radius-lg:1.25rem;--shadow-glow:0 10px 40px -10px #4ade8059}@media (width>=768px){:root{--gutter:32px}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{background:var(--bg);color:var(--fg);font-family:var(--font);font-size:var(--fs-body);-webkit-font-smoothing:antialiased;margin:0;line-height:1.6;overflow-x:hidden}img{max-width:100%;height:auto;display:block}a{color:inherit}h1,h2,h3,h4{letter-spacing:var(--tracking-tight);margin:0;font-weight:700;line-height:1.15}p{margin:0}.container{width:100%;max-width:var(--container);padding-inline:var(--gutter);margin-inline:auto}.muted{color:var(--muted)}.text-gradient{background:var(--gradient);color:#0000;-webkit-background-clip:text;background-clip:text}.text-green{color:var(--green)}.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}.btn{border-radius:var(--radius);min-height:48px;font:600 1rem/1 var(--font);cursor:pointer;border:0;justify-content:center;align-items:center;gap:10px;padding:0 28px;text-decoration:none;transition:transform .15s,box-shadow .2s,background-color .2s;display:inline-flex}.btn-primary{background:var(--gradient);color:var(--on-accent);box-shadow:var(--shadow-glow)}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 14px 44px -10px #4ade8080}.btn-ghost{color:var(--fg);border:1px solid var(--line);background:#ffffff0d}.btn-ghost:hover{background:#ffffff17}.btn-lg{min-height:56px;padding:0 36px;font-size:1.0625rem}.btn .arrow{transition:transform .15s}.btn:hover .arrow{transform:translate(3px)}:focus-visible{outline:3px solid var(--green);outline-offset:2px;border-radius:6px}.skip-link{z-index:100;background:var(--fg);color:var(--bg);border-radius:8px;padding:10px 16px;position:absolute;top:-48px;left:12px}.skip-link:focus{top:12px}.page-banner{background:var(--surface-2);border-bottom:1px solid var(--line);text-align:center;padding:clamp(36px,6vw,56px) 0}.page-banner h1{font-size:var(--fs-h2);text-transform:uppercase}.page-banner p{color:var(--muted);font-size:var(--fs-lead);margin-top:12px}.prose{max-width:70ch;color:var(--fg-soft)}.prose h2{margin:2em 0 .6em;font-size:1.5rem}.prose p,.prose ul{margin:0 0 1em}.prose a{color:var(--green)}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.logo[data-astro-cid-r4ibslmy]{align-items:center;gap:10px;text-decoration:none;display:inline-flex}.badge[data-astro-cid-r4ibslmy]{width:var(--s);height:var(--s);background:var(--logo-bg);border-radius:12px;flex:none;place-items:center;display:grid;overflow:hidden}.badge[data-astro-cid-r4ibslmy] img[data-astro-cid-r4ibslmy]{object-fit:contain;width:88%;height:88%}.name[data-astro-cid-r4ibslmy]{letter-spacing:-.01em;white-space:nowrap;font-size:1.0625rem;font-weight:700}.site-header[data-astro-cid-isef26zo]{z-index:50;background:color-mix(in srgb, var(--bg-header) 92%, transparent);-webkit-backdrop-filter:saturate(140%)blur(8px);backdrop-filter:saturate(140%)blur(8px);border-bottom:1px solid var(--line);position:sticky;top:0}.bar[data-astro-cid-isef26zo]{justify-content:space-between;align-items:center;gap:16px;min-height:72px;display:flex}.nav[data-astro-cid-isef26zo] ul[data-astro-cid-isef26zo],.sheet[data-astro-cid-isef26zo] ul[data-astro-cid-isef26zo]{margin:0;padding:0;list-style:none}.nav[data-astro-cid-isef26zo]{display:none}.nav[data-astro-cid-isef26zo] ul[data-astro-cid-isef26zo]{gap:36px;display:flex}.nav[data-astro-cid-isef26zo] a[data-astro-cid-isef26zo],.sheet[data-astro-cid-isef26zo] a[data-astro-cid-isef26zo]:not(.btn){color:var(--muted);font-size:.9375rem;text-decoration:none;transition:color .2s}.nav[data-astro-cid-isef26zo] a[data-astro-cid-isef26zo]:hover,.nav[data-astro-cid-isef26zo] a[data-astro-cid-isef26zo][aria-current=page],.sheet[data-astro-cid-isef26zo] a[data-astro-cid-isef26zo][aria-current=page]{color:var(--fg)}.nav[data-astro-cid-isef26zo] a[data-astro-cid-isef26zo][aria-current=page]{font-weight:600}.cta[data-astro-cid-isef26zo]{min-height:42px;padding:0 20px;font-size:.9375rem;display:none}.mobile-menu[data-astro-cid-isef26zo] summary[data-astro-cid-isef26zo]{cursor:pointer;border:1px solid var(--line);width:44px;height:44px;color:var(--fg);border-radius:10px;place-items:center;list-style:none;display:grid}.mobile-menu[data-astro-cid-isef26zo] summary[data-astro-cid-isef26zo]::-webkit-details-marker{display:none}.sheet[data-astro-cid-isef26zo]{background:var(--bg-header);border-bottom:1px solid var(--line);padding:8px var(--gutter) 20px;gap:12px;display:grid;position:absolute;top:100%;left:0;right:0}.sheet[data-astro-cid-isef26zo] li[data-astro-cid-isef26zo] a[data-astro-cid-isef26zo]{border-bottom:1px solid var(--line);padding:12px 0;font-size:1.0625rem;display:block}@media (width>=900px){.nav[data-astro-cid-isef26zo],.cta[data-astro-cid-isef26zo]{display:block}.cta[data-astro-cid-isef26zo]{display:inline-flex}.mobile-menu[data-astro-cid-isef26zo]{display:none}}.site-footer[data-astro-cid-oenwriqq]{background:var(--bg-header);border-top:1px solid var(--line);margin-top:clamp(40px,6vw,72px);padding-top:56px}.grid[data-astro-cid-oenwriqq]{grid-template-columns:1fr;gap:32px;padding-bottom:40px;display:grid}.slogan[data-astro-cid-oenwriqq]{max-width:32ch;font-size:var(--fs-small);margin-top:14px}.links[data-astro-cid-oenwriqq]{gap:14px;margin:0;padding:0;list-style:none;display:grid}.links[data-astro-cid-oenwriqq] a[data-astro-cid-oenwriqq]{color:var(--muted);font-size:.9375rem;text-decoration:none}.links[data-astro-cid-oenwriqq] a[data-astro-cid-oenwriqq]:hover{color:var(--fg)}.social[data-astro-cid-oenwriqq]{align-items:flex-start;gap:12px;display:flex}.social[data-astro-cid-oenwriqq] a[data-astro-cid-oenwriqq]{border:1px solid var(--line);width:42px;height:42px;color:var(--muted);border-radius:10px;place-items:center;transition:color .2s,border-color .2s;display:grid}.social[data-astro-cid-oenwriqq] a[data-astro-cid-oenwriqq]:hover{color:var(--green);border-color:var(--green)}.bottom[data-astro-cid-oenwriqq]{border-top:1px solid var(--line);text-align:center;font-size:var(--fs-small);gap:6px;padding-block:22px 96px;display:grid}@media (width>=768px){.grid[data-astro-cid-oenwriqq]{grid-template-columns:1.4fr 1fr 1fr auto}.bottom[data-astro-cid-oenwriqq]{padding-bottom:24px}}.zalo-float[data-astro-cid-x65vpo5h]{z-index:60;background:var(--zalo);color:#fff;width:58px;height:58px;font:700 .875rem/1 var(--font);border-radius:50%;place-items:center;text-decoration:none;transition:transform .15s;display:grid;position:fixed;bottom:16px;right:16px;box-shadow:0 10px 30px #0068ff73}.zalo-float[data-astro-cid-x65vpo5h]:hover{transform:scale(1.06)}.zalo-float[data-astro-cid-x65vpo5h]:after{content:"";border:2px solid #0068ff80;border-radius:50%;animation:2.4s ease-out infinite pulse;position:absolute;inset:-6px}@keyframes pulse{0%{opacity:1;transform:scale(.9)}to{opacity:0;transform:scale(1.25)}}