:root{--ink:#0F2533;--muted:#5B7080;--line:#DCE7EE;--brand:#0EA5E9;--bg:#F3F8FB}
*{box-sizing:border-box}body{margin:0;font:17px/1.6 "Be Vietnam Pro",system-ui,Segoe UI,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:#0369A1}header.t{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0}
.logo{font-weight:800;text-decoration:none;color:var(--ink)}nav a{margin-left:12px;text-decoration:none;font-weight:600}nav a.cta{background:var(--brand);color:#fff;padding:7px 14px;border-radius:999px}
main{max-width:920px;margin:0 auto;padding:16px}.crumb{font-size:14px;color:var(--muted);margin:6px 0 10px}h1{font-size:28px;line-height:1.3;margin:6px 0}.sub{color:var(--muted);margin:0 0 12px}
article,.ls,.grid{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.br li{margin:4px 0;font-weight:600}.feat{padding-left:18px}.feat li{margin:4px 0}
.big{display:inline-block;background:var(--brand);color:#fff;text-decoration:none;font-weight:800;padding:12px 22px;border-radius:14px;margin:8px 0}
.pn{display:flex;justify-content:space-between;gap:12px;margin-top:14px;font-size:15px}.ls{padding-left:36px}.ls li{margin:10px 0}.ls li span{display:block;color:var(--muted);font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}.card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:12px;padding:12px;text-decoration:none;color:var(--ink)}.card span{color:var(--muted);font-size:14px}
footer{text-align:center;color:var(--muted);font-size:14px;padding:24px 16px}
/* đầu trang trên điện thoại: không xuống dòng lệch */
header.t{flex-wrap:nowrap}.logo{white-space:nowrap;font-size:18px;min-width:0;overflow:hidden;text-overflow:ellipsis}
header.t nav{display:flex;align-items:center;gap:10px;flex-shrink:0}header.t nav a{margin:0;white-space:nowrap}
@media(max-width:480px){header.t{padding:10px 12px}.logo{font-size:16px}header.t nav a{font-size:14px}header.t nav a.cta{padding:6px 12px}}
@media(max-width:480px){header.t nav a:not(.cta){display:none}}
.shr-btn{display:inline-flex;align-items:center;gap:6px;border:1.5px solid #0EA5E9;background:#fff;color:#0369A1;border-radius:999px;padding:8px 16px;font:inherit;font-weight:700;font-size:15px;cursor:pointer;vertical-align:middle}
.act{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.act .big{margin:0}