@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/be-vietnam-pro-latin-400-normal.PpnXBOrz.woff2)format("woff2"),url(/_astro/be-vietnam-pro-latin-400-normal.bXgqVju9.woff)format("woff")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/be-vietnam-pro-vietnamese-400-normal.CRcqvyg1.woff2)format("woff2"),url(/_astro/be-vietnam-pro-vietnamese-400-normal.BuGn0gnm.woff)format("woff")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:500;src:url(/_astro/be-vietnam-pro-latin-500-normal.B6LVzGNe.woff2)format("woff2"),url(/_astro/be-vietnam-pro-latin-500-normal.BJkVuMHw.woff)format("woff")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:500;src:url(/_astro/be-vietnam-pro-vietnamese-500-normal.DREgrEoJ.woff2)format("woff2"),url(/_astro/be-vietnam-pro-vietnamese-500-normal.CfdwVo8-.woff)format("woff")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:600;src:url(/_astro/be-vietnam-pro-latin-600-normal.BZDkUTrt.woff2)format("woff2"),url(/_astro/be-vietnam-pro-latin-600-normal.5IO4e7bK.woff)format("woff")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:600;src:url(/_astro/be-vietnam-pro-vietnamese-600-normal.nyU-ZL2p.woff2)format("woff2"),url(/_astro/be-vietnam-pro-vietnamese-600-normal.DkpCIyan.woff)format("woff")}:root{--c-bg:#f4f5f8;--c-bg-haze-1:#e9e8fb;--c-bg-haze-2:#e4eef8;--c-surface:#fff;--c-surface-2:#f9fafb;--c-ink:#121419;--c-ink-2:#474d59;--c-ink-3:#5f6673;--c-line:#12141914;--c-line-strong:#12141924;--c-accent:#4150e6;--c-accent-hover:#3442d4;--c-accent-soft:#eceefe;--c-on-accent:#fff;--c-good:#1f7a4d;--c-good-soft:#e3f3ea;--c-warn:#8a5a00;--c-warn-soft:#fbf0d9;--glass-bg:#ffffff9e;--glass-bg-strong:#fffc;--glass-highlight:#ffffffd9;--glass-edge:#181c3c12;--glass-blur:18px;--glass-saturate:160%;--font-sans:"Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--fw-regular:400;--fw-medium:500;--fw-semibold:600;--fs-12:.75rem;--fs-13:.8125rem;--fs-14:.875rem;--fs-16:1rem;--fs-18:1.125rem;--fs-20:1.25rem;--fs-24:1.5rem;--fs-32:2rem;--fs-display:clamp(2.125rem, 1.4rem + 3.2vw, 3.75rem);--lh-tight:1.12;--lh-snug:1.3;--lh-body:1.6;--tracking-display:-.025em;--tracking-label:.04em;--s-1:4px;--s-2:8px;--s-3:12px;--s-4:16px;--s-5:20px;--s-6:24px;--s-8:32px;--s-10:40px;--s-12:48px;--s-16:64px;--s-20:80px;--s-24:96px;--gutter:max(16px, env(safe-area-inset-left,0px));--content-max:1200px;--r-control:12px;--r-card:16px;--r-panel:24px;--r-full:999px;--sh-1:0 1px 2px #1e22500d, 0 2px 8px #1e22500a;--sh-2:0 2px 6px #1e22500d, 0 14px 36px #1e225014;--sh-3:0 4px 14px #1e22500f, 0 28px 72px #1e225021;--ease-soft:cubic-bezier(.22, 1, .36, 1);--ease-standard:cubic-bezier(.2, 0, 0, 1);--dur-press:.12s;--dur-fast:.2s;--dur-slow:.48s;--dur-page:.52s}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;color-scheme:light;scroll-padding-top:88px}body{background-color:var(--c-bg);background-image:radial-gradient(60rem 36rem at 12% -8%, var(--c-bg-haze-1), transparent 70%), radial-gradient(52rem 32rem at 96% 4%, var(--c-bg-haze-2), transparent 70%);min-height:100dvh;color:var(--c-ink);font-family:var(--font-sans);font-size:var(--fs-16);line-height:var(--lh-body);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;background-repeat:no-repeat;margin:0}h1,h2,h3,h4,p,ul,ol,figure{margin:0}h1,h2,h3{font-weight:var(--fw-semibold);line-height:var(--lh-tight);letter-spacing:var(--tracking-display);text-wrap:balance}p{text-wrap:pretty}img,video,svg{max-width:100%;height:auto;display:block}a{color:inherit}button,input,textarea,select{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:6px}.tnum{font-variant-numeric:tabular-nums}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;overflow:hidden;position:absolute!important}.glass{background:var(--glass-bg);border:1px solid var(--glass-edge);box-shadow:inset 0 1px 0 var(--glass-highlight), var(--sh-1);backdrop-filter:blur(var(--glass-blur)) saturate(var(--glass-saturate))}@supports not (backdrop-filter:blur(1px)){.glass{background:var(--glass-bg-strong)}}@media (prefers-reduced-transparency:reduce){.glass{background:var(--c-surface);backdrop-filter:none}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:1ms!important;animation-duration:1ms!important;animation-iteration-count:1!important}}:root{--pad:16px}@media (width>=640px){:root{--pad:24px}}@media (width>=1024px){:root{--pad:40px}}@view-transition{navigation:auto}::view-transition-group(*){animation-duration:var(--dur-page);animation-timing-function:var(--ease-soft)}::view-transition-old(root),::view-transition-new(root){animation-duration:.28s;animation-timing-function:var(--ease-standard)}@media (prefers-reduced-motion:reduce){@view-transition{navigation:none}::view-transition-group(*),::view-transition-old(*),::view-transition-new(*){animation:none!important}}.container{max-width:calc(var(--content-max) + 2 * var(--pad));padding-left:max(var(--pad), env(safe-area-inset-left,0px));padding-right:max(var(--pad), env(safe-area-inset-right,0px));margin-inline:auto}.section{padding-block:var(--s-16)}@media (width>=1024px){.section{padding-block:var(--s-24)}}.section-head{gap:var(--s-3);max-width:62ch;margin-bottom:var(--s-10);display:grid}.section-head h2{font-size:clamp(1.75rem,1.25rem + 1.8vw,2.5rem)}.section-head p:not(.eyebrow){color:var(--c-ink-2);font-size:var(--fs-18)}.eyebrow{color:var(--c-ink-3);font-size:var(--fs-12);font-weight:var(--fw-semibold);letter-spacing:var(--tracking-label);text-transform:uppercase}.btn{justify-content:center;align-items:center;gap:var(--s-2);min-height:48px;padding:0 var(--s-5);border-radius:var(--r-control);font-size:var(--fs-16);font-weight:var(--fw-semibold);white-space:nowrap;cursor:pointer;transition:transform var(--dur-press) var(--ease-standard), background-color var(--dur-fast) var(--ease-standard), border-color var(--dur-fast) var(--ease-standard);border:1px solid #0000;line-height:1;text-decoration:none;display:inline-flex}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.6;cursor:progress}.btn-primary{background:var(--c-accent);color:var(--c-on-accent);box-shadow:0 1px 2px #1e227833,0 8px 20px #4150e638}.btn-primary:hover{background:var(--c-accent-hover)}.btn-secondary{background:var(--c-surface);border-color:var(--c-line-strong);color:var(--c-ink)}.btn-secondary:hover{border-color:#1214193d}.btn-sm{min-height:44px;padding:0 var(--s-4);border-radius:var(--r-full);font-size:var(--fs-14)}.chip{align-items:center;gap:var(--s-1);border-radius:var(--r-full);background:var(--c-surface);border:1px solid var(--c-line);min-height:24px;color:var(--c-ink-2);font-size:var(--fs-12);font-weight:var(--fw-semibold);letter-spacing:.01em;padding:0 10px;display:inline-flex}.chip-good{background:var(--c-good-soft);color:var(--c-good);border-color:#0000}.chip-warn{background:var(--c-warn-soft);color:var(--c-warn);border-color:#0000}.link-arrow{align-items:center;gap:var(--s-1);color:var(--c-accent);font-weight:var(--fw-semibold);text-decoration:none;display:inline-flex}.link-arrow:hover{text-underline-offset:4px;text-decoration:underline}.prose{gap:var(--s-4);max-width:68ch;color:var(--c-ink-2);font-size:var(--fs-18);display:grid}.prose h2{margin-top:var(--s-4);color:var(--c-ink);font-size:var(--fs-24)}.prose ul{gap:var(--s-2);padding-left:1.2em;display:grid}.prose strong{color:var(--c-ink);font-weight:var(--fw-semibold)}@supports (animation-timeline:view()){@media (prefers-reduced-motion:no-preference){.reveal{animation:linear both reveal-rise view();animation-range:entry entry 45%}}}@keyframes reveal-rise{0%{transform:translateY(32px)}}.nav-wrap[data-astro-cid-wpvy4v7s]{z-index:50;padding-top:calc(env(safe-area-inset-top,0px) + var(--s-3));padding-left:max(var(--pad), env(safe-area-inset-left,0px));padding-right:max(var(--pad), env(safe-area-inset-right,0px));view-transition-name:site-nav;position:sticky;top:0}.nav-wrap[data-astro-cid-wpvy4v7s]:before{content:"";z-index:-1;background:linear-gradient(var(--c-bg) 45%, #f4f5f800);pointer-events:none;height:calc(100% - 20px);position:absolute;inset:0 0 auto}.nav[data-astro-cid-wpvy4v7s]{align-items:center;gap:var(--s-4);max-width:var(--content-max);min-height:56px;padding:6px 6px 6px var(--s-4);border-radius:var(--r-full);background:#ffffffb8;margin-inline:auto;display:flex}.brand[data-astro-cid-wpvy4v7s]{align-items:center;gap:var(--s-2);color:var(--c-ink);font-weight:var(--fw-semibold);letter-spacing:-.01em;text-decoration:none;display:inline-flex}.brand-mark[data-astro-cid-wpvy4v7s]{color:var(--c-ink);display:inline-flex}.nav-links[data-astro-cid-wpvy4v7s]{gap:2px;margin:0 auto;padding:0;list-style:none;display:none;position:relative}.nav-links[data-astro-cid-wpvy4v7s] a[data-astro-cid-wpvy4v7s]{min-height:40px;padding:0 var(--s-3);border-radius:var(--r-full);color:var(--c-ink-2);font-size:var(--fs-14);font-weight:var(--fw-medium);transition:color var(--dur-fast) var(--ease-standard);align-items:center;text-decoration:none;display:inline-flex}.nav-links[data-astro-cid-wpvy4v7s] a[data-astro-cid-wpvy4v7s]:hover,.nav-links[data-astro-cid-wpvy4v7s] a[data-astro-cid-wpvy4v7s][data-active],.nav-links[data-astro-cid-wpvy4v7s] a[data-astro-cid-wpvy4v7s][aria-current=page]{color:var(--c-ink)}.nav-indicator[data-astro-cid-wpvy4v7s]{background:var(--c-accent);transform-origin:0;opacity:0;width:100px;height:2px;transition:transform var(--dur-slow) var(--ease-soft), opacity var(--dur-fast) var(--ease-standard);pointer-events:none;position:absolute;bottom:4px;left:0}.nav-cta[data-astro-cid-wpvy4v7s]{margin-left:auto}.menu-btn[data-astro-cid-wpvy4v7s]{cursor:pointer;background:#1214190f;border:0;border-radius:50%;flex:none;place-items:center;width:44px;height:44px;display:grid}.menu-btn[data-astro-cid-wpvy4v7s] span[data-astro-cid-wpvy4v7s],.menu-btn[data-astro-cid-wpvy4v7s] span[data-astro-cid-wpvy4v7s]:before{background:var(--c-ink);border-radius:2px;width:16px;height:1.75px;display:block}.menu-btn[data-astro-cid-wpvy4v7s] span[data-astro-cid-wpvy4v7s]{position:relative;transform:translateY(-3px)}.menu-btn[data-astro-cid-wpvy4v7s] span[data-astro-cid-wpvy4v7s]:before{content:"";position:absolute;top:6px}.menu[data-astro-cid-wpvy4v7s]{inset:calc(env(safe-area-inset-top,0px) + 76px) max(var(--pad), env(safe-area-inset-right,0px)) auto max(var(--pad), env(safe-area-inset-left,0px));width:auto;padding:var(--s-4);border-radius:var(--r-panel);color:var(--c-ink);box-shadow:inset 0 1px 0 var(--glass-highlight), var(--sh-3);opacity:0;transition:opacity var(--dur-fast) var(--ease-standard), transform var(--dur-slow) var(--ease-soft), overlay var(--dur-slow) allow-discrete, display var(--dur-slow) allow-discrete;background:#ffffffdb;margin:0;position:fixed;transform:translateY(-8px)scale(.98)}.menu[data-astro-cid-wpvy4v7s]:popover-open{opacity:1;transform:none}@starting-style{.menu[data-astro-cid-wpvy4v7s]:popover-open{opacity:0;transform:translateY(-8px)scale(.98)}}.menu[data-astro-cid-wpvy4v7s] ul[data-astro-cid-wpvy4v7s]{margin:0 0 var(--s-3);padding:0;list-style:none;display:grid}.menu[data-astro-cid-wpvy4v7s] li[data-astro-cid-wpvy4v7s] a[data-astro-cid-wpvy4v7s]{min-height:48px;padding:0 var(--s-3);border-radius:var(--r-control);font-size:var(--fs-18);font-weight:var(--fw-medium);align-items:center;text-decoration:none;display:flex}.menu[data-astro-cid-wpvy4v7s] li[data-astro-cid-wpvy4v7s] a[data-astro-cid-wpvy4v7s]:active{background:#1214190d}.menu[data-astro-cid-wpvy4v7s] .btn[data-astro-cid-wpvy4v7s]{width:100%}.cta-short[data-astro-cid-wpvy4v7s]{display:none}@media (width<=859px){.nav[data-astro-cid-wpvy4v7s]{gap:var(--s-2)}}@media (width<=440px){.cta-long[data-astro-cid-wpvy4v7s]{display:none}.cta-short[data-astro-cid-wpvy4v7s]{display:inline}.nav-cta[data-astro-cid-wpvy4v7s]{padding:0 var(--s-3);font-size:var(--fs-13)}}@media (width>=860px){.nav-links[data-astro-cid-wpvy4v7s]{display:flex}.nav-cta[data-astro-cid-wpvy4v7s]{margin-left:0}.menu-btn[data-astro-cid-wpvy4v7s],.menu[data-astro-cid-wpvy4v7s]{display:none}}.footer[data-astro-cid-jo6i4kqk]{margin-top:var(--s-24);padding-block:var(--s-10) calc(var(--s-10) + env(safe-area-inset-bottom,0px));border-top:1px solid var(--c-line)}.footer-inner[data-astro-cid-jo6i4kqk]{gap:var(--s-6);display:grid}.footer-brand[data-astro-cid-jo6i4kqk]{gap:var(--s-1);max-width:44ch;color:var(--c-ink-2);font-size:var(--fs-14);display:grid}.footer-brand[data-astro-cid-jo6i4kqk] strong[data-astro-cid-jo6i4kqk]{color:var(--c-ink);font-weight:var(--fw-semibold)}.footer-links[data-astro-cid-jo6i4kqk]{gap:var(--s-2) var(--s-5);font-size:var(--fs-14);flex-wrap:wrap;padding:0;list-style:none;display:flex}.footer-links[data-astro-cid-jo6i4kqk] a[data-astro-cid-jo6i4kqk]{color:var(--c-ink-2);text-decoration:none}.footer-links[data-astro-cid-jo6i4kqk] a[data-astro-cid-jo6i4kqk]:hover{color:var(--c-ink)}.footer-meta[data-astro-cid-jo6i4kqk]{color:var(--c-ink-3);font-size:var(--fs-13)}@media (width>=860px){.footer-inner[data-astro-cid-jo6i4kqk]{grid-template-columns:1fr auto;align-items:start}.footer-meta[data-astro-cid-jo6i4kqk]{grid-column:1/-1}}.avatar[data-astro-cid-u5m3xj5o]{object-fit:cover;box-shadow:0 0 0 2px var(--c-surface), var(--sh-1);border-radius:50%;flex:none}.fab[data-astro-cid-5jzoedjg]{right:max(var(--s-4), env(safe-area-inset-right,0px));bottom:calc(var(--s-4) + env(safe-area-inset-bottom,0px));z-index:40;align-items:center;gap:var(--s-2);min-height:52px;padding:6px var(--s-4) 6px 6px;border-radius:var(--r-full);color:var(--c-ink);font-size:var(--fs-14);font-weight:var(--fw-semibold);box-shadow:inset 0 1px 0 var(--glass-highlight), var(--sh-2);opacity:0;pointer-events:none;transition:opacity var(--dur-slow) var(--ease-soft), transform var(--dur-slow) var(--ease-soft);view-transition-name:zalo-fab;text-decoration:none;display:inline-flex;position:fixed;transform:translateY(12px)scale(.96)}.fab[data-astro-cid-5jzoedjg][data-visible=true]{opacity:1;pointer-events:auto;transform:none}.fab[data-astro-cid-5jzoedjg]:active{transition-duration:var(--dur-press);transform:scale(.97)}.fab[data-astro-cid-5jzoedjg] .fab-avatar{box-shadow:0 0 0 2px var(--c-surface)}@media (width<=639px){.fab[data-astro-cid-5jzoedjg]{min-height:48px;padding-right:var(--s-3);gap:6px}.fab-label[data-astro-cid-5jzoedjg]{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}}.skip-link[data-astro-cid-hkbrpulz]{left:var(--s-4);z-index:100;padding:var(--s-2) var(--s-4);border-radius:var(--r-control);background:var(--c-ink);color:#fff;text-decoration:none;position:absolute;top:-100px}.skip-link[data-astro-cid-hkbrpulz]:focus{top:var(--s-4)}