:root{--navy:#062b59;--navy2:#031f43;--blue:#0967c9;--orange:#ff8a00;--ink:#17263b;--muted:#66758a;--line:#dde6ef;--soft:#f4f7fa;--shadow:0 12px 32px rgba(4,37,78,.1)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);font:16px/1.72 Inter,"Segoe UI",Arial,sans-serif;background:#fff}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{width:min(1120px,calc(100% - 32px));margin:auto}
.topbar{color:#dfeaf6;font-size:13px;background:var(--navy2)}
.topbar .wrap{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar strong{color:#ffb13b}
.header{position:sticky;z-index:30;top:0;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 3px 12px rgba(3,31,67,.06)}
.nav{min-height:72px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:10px;margin-right:auto;color:var(--navy);font-weight:900}
.brand img{width:48px;height:48px;object-fit:contain}
.brand small{display:block;color:#0b9daf;font-size:10px;letter-spacing:.08em}
.navlinks{display:flex;align-items:center;gap:20px;color:#344b65;font-size:14px;font-weight:700}
.navlinks a:hover{color:var(--blue)}
.zalo{display:inline-flex;align-items:center;justify-content:center;padding:10px 15px;color:#fff!important;font-weight:900;background:var(--blue);border-radius:7px}
.breadcrumb{padding:18px 0;color:var(--muted);font-size:13px}
.breadcrumb a{color:var(--blue)}
.hero{padding:46px 0 52px;background:linear-gradient(135deg,#f2f7fd,#fff)}
.heroGrid{display:grid;grid-template-columns:1fr 300px;gap:36px;align-items:center}
.eyebrow{color:var(--orange);font-size:13px;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
h1{max-width:850px;margin:10px 0 16px;color:var(--navy);font-size:clamp(34px,5vw,52px);line-height:1.12}
.lead{max-width:780px;margin:0;color:#50647c;font-size:18px}
.heroBox{padding:24px;color:#fff;background:linear-gradient(135deg,var(--navy),#0a4f9c);box-shadow:var(--shadow)}
.heroBox b{display:block;margin-bottom:8px;font-size:19px}
.heroBox p{margin:0 0 17px;color:#d7e8f8;font-size:14px}
.heroBox a{display:inline-flex;padding:10px 14px;color:#fff;font-size:13px;font-weight:900;background:var(--orange);border-radius:5px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:42px;padding:48px 0 64px}
.article{min-width:0}
.article h2{margin:38px 0 12px;color:var(--navy);font-size:29px;line-height:1.25}
.article h2:first-child{margin-top:0}
.article h3{margin:27px 0 8px;color:#0a4f9c;font-size:21px}
.article p{margin:0 0 17px}
.article a{color:var(--blue);font-weight:700;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.article ul,.article ol{margin:0 0 20px;padding-left:24px}
.article li{margin:7px 0}
.article strong{color:var(--navy)}
.highlight{margin:28px 0;padding:20px 22px;background:#f1f7ff;border-left:4px solid var(--blue)}
.highlight p:last-child{margin-bottom:0}
.faq{display:grid;gap:12px;margin:20px 0 28px}
.faqItem{padding:18px 20px;background:#fff;border:1px solid var(--line)}
.faqItem h3{margin:0 0 7px;color:var(--navy);font-size:18px}
.faqItem p{margin:0;color:#50647c}
.steps{display:grid;gap:12px;margin:22px 0}
.step{display:grid;grid-template-columns:46px 1fr;gap:14px;padding:16px;background:#fff;border:1px solid var(--line)}
.step span{width:38px;height:38px;display:grid;place-items:center;color:#fff;font-weight:900;background:var(--blue);border-radius:50%}
.step b{display:block;color:var(--navy)}
.step p{margin:3px 0 0;color:var(--muted);font-size:14px}
.side{position:sticky;top:98px;align-self:start}
.sideCard{margin-bottom:16px;padding:20px;background:#fff;border:1px solid var(--line);box-shadow:0 5px 18px rgba(4,37,78,.06)}
.sideCard h2{margin:0 0 12px;color:var(--navy);font-size:18px}
.sideCard a:not(.zalo){display:block;padding:9px 0;color:#425a75;font-size:14px;border-bottom:1px solid #edf1f5}
.sideCard a:last-child{border-bottom:0}
.sideCard .zalo{width:100%;margin-top:8px;color:#fff}
.author{display:grid;grid-template-columns:70px 1fr;gap:13px;align-items:center}
.author img{width:70px;height:70px;object-fit:cover;border-radius:50%}
.author b{display:block;color:var(--navy)}
.author span{color:var(--muted);font-size:12px}
.related{padding:52px 0;background:var(--soft)}
.related h2{margin:0 0 22px;color:var(--navy);font-size:28px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{display:flex;min-height:190px;flex-direction:column;padding:20px;background:#fff;border:1px solid var(--line)}
.card small{color:var(--orange);font-weight:900;text-transform:uppercase}
.card h3{margin:8px 0;color:var(--navy);font-size:19px;line-height:1.3}
.card p{margin:0 0 13px;color:var(--muted);font-size:13px}
.card a{margin-top:auto;color:var(--blue);font-size:13px;font-weight:900}
.footer{padding:34px 0;color:#b5c7da;background:#061a36}
.footer .wrap{display:flex;justify-content:space-between;gap:24px}
.footer b{color:#fff}
.footer p{margin:4px 0;font-size:13px}
.floatZalo{position:fixed;right:16px;bottom:16px;z-index:40;padding:11px 15px;color:#fff;font-size:13px;font-weight:900;background:var(--orange);border-radius:6px;box-shadow:0 9px 24px rgba(0,0,0,.18)}
.indexHero{padding:52px 0;background:linear-gradient(135deg,var(--navy),#0b5fb5);color:#fff}
.indexHero h1{color:#fff}
.indexHero .lead{color:#d8e9fa}
.articleGrid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;padding:50px 0}
.articleCard{display:flex;min-height:240px;flex-direction:column;padding:25px;background:#fff;border:1px solid var(--line);box-shadow:0 5px 18px rgba(4,37,78,.06)}
.articleCard small{color:var(--orange);font-weight:900;text-transform:uppercase}
.articleCard h2{margin:10px 0;color:var(--navy);font-size:24px;line-height:1.3}
.articleCard p{margin:0 0 18px;color:var(--muted);font-size:14px}
.articleCard a{margin-top:auto;color:var(--blue);font-weight:900}
.achievements{display:grid;gap:18px}
.achievement{display:grid;grid-template-columns:170px 1fr;gap:24px;padding:20px;background:#fff;border:1px solid var(--line)}
.achievement img{width:170px;height:170px;object-fit:cover;border-radius:10px}
.achievement h2{margin:0 0 5px}
.achievement ul{margin:12px 0 0}
@media(max-width:850px){.heroGrid,.layout{grid-template-columns:1fr}.side{position:static}.cards{grid-template-columns:1fr 1fr}.navlinks a:not(.zalo){display:none}.achievement{grid-template-columns:130px 1fr}.achievement img{width:130px;height:130px}}
@media(max-width:600px){.topbar{display:none}.nav{min-height:64px}.brand img{width:42px;height:42px}.brand span{font-size:13px}.hero{padding:34px 0}.heroBox{display:none}.layout{padding-top:34px}.cards,.articleGrid{grid-template-columns:1fr}.article h2{font-size:25px}.footer .wrap{display:block}.achievement{grid-template-columns:1fr}.achievement img{width:min(100%,230px);height:auto;aspect-ratio:1}.floatZalo{right:10px;bottom:10px}}