:root{--mực:#14495A;--mực2:#0f3a48;--son:#B8322A;--đồng:#C9A86A;--giấy:#F6F1E7;--chữ:#1d2b30;--phụ:#5b6b70;--viền:#e6dcc7}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Be Vietnam Pro',system-ui,sans-serif;background:var(--giấy);color:var(--chữ);line-height:1.75;font-size:17px;-webkit-text-size-adjust:100%}
img{max-width:100%;display:block}a{color:var(--son)}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
header.top{background:rgba(246,241,231,.96);border-bottom:1px solid var(--viền);position:sticky;top:0;z-index:10}
header.top .wrap{max-width:1080px;display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
header.top img{height:44px;width:auto}
header.top nav{display:flex;gap:20px;font-size:14.5px;font-weight:500}header.top nav a{color:var(--mực);text-decoration:none}
.nút{display:inline-block;background:var(--son);color:#fff!important;text-decoration:none;font-weight:600;padding:12px 24px;border-radius:999px;min-height:46px}
h1,h2,h3{font-family:'Playfair Display','Noto Serif SC',serif;color:var(--mực);line-height:1.3}
h1{font-size:clamp(28px,6vw,42px);margin:34px 0 12px}
h2{font-size:clamp(22px,4.6vw,28px);margin:38px 0 10px}
.meta{color:var(--phụ);font-size:14px;margin-bottom:22px}
article p{margin:0 0 16px}article ul{margin:0 0 16px 22px}article li{margin-bottom:6px}
.han{font-family:'Noto Serif SC',serif}
.tbl{overflow-x:auto;margin:18px 0 24px;border:1px solid var(--viền);border-radius:12px;background:#fff}
table{border-collapse:collapse;width:100%;min-width:480px;font-size:16px}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--viền)}th{background:var(--mực);color:#fff;font-weight:600;font-size:14px}
tr:last-child td{border-bottom:0}td.c{font-family:'Noto Serif SC',serif;font-size:24px;color:var(--mực)}
.hộp{background:#fbf4e2;border:1px dashed var(--đồng);border-radius:14px;padding:16px 20px;margin:22px 0}
.cta{background:var(--mực);color:#fff;border-radius:18px;padding:28px 24px;text-align:center;margin:40px 0}
.cta h3{color:#fff;margin-bottom:8px}.cta p{color:#dce8eb;margin-bottom:16px}
.thẻ{display:block;background:#fff;border:1px solid var(--viền);border-radius:16px;padding:22px;margin:16px 0;text-decoration:none;color:inherit}
.thẻ h2{margin:0 0 6px;font-size:22px}.thẻ p{color:var(--phụ);margin:0;font-size:15.5px}
footer{background:var(--mực2);color:#cfdde1;padding:30px 0;margin-top:40px;font-size:14px;text-align:center}footer a{color:#e6c88a}
@keyframes nháy{0%,100%{box-shadow:0 0 0 0 rgba(184,50,42,.65);transform:scale(1)}50%{box-shadow:0 0 0 12px rgba(184,50,42,0);transform:scale(1.07)}}
.nhay{animation:nháy 1.5s ease-in-out infinite}.nhay:hover{animation:none}
@media(prefers-reduced-motion:reduce){.nhay{animation:none}}
/* hình minh họa + liên kết trong bài */
.minhhoa{margin:20px 0 26px;background:linear-gradient(135deg,#0f3a48,#14495A);border-radius:18px;padding:24px 18px;color:#fff;text-align:center}
.minhhoa .hàng{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.minhhoa .cặp{background:rgba(255,255,255,.07);border:1px solid rgba(201,168,106,.45);border-radius:14px;padding:12px 16px;min-width:120px}
.minhhoa .chữ{font-family:'Noto Serif SC',serif;font-size:44px;line-height:1.1}
.minhhoa .chữ .mũi{font-family:'Be Vietnam Pro',sans-serif;font-size:22px;color:#C9A86A;margin:0 8px;vertical-align:middle}
.minhhoa .nhỏ{font-size:13px;color:#cfe0e5;margin-top:6px}
.minhhoa figcaption{margin-top:14px;font-size:14px;color:#e6c88a}
.minhhoa .thẻ2{background:#fff;color:var(--chữ);border-radius:14px;padding:16px;text-align:left;flex:1;min-width:220px;max-width:320px}
.minhhoa .thẻ2 b{font-size:26px;font-family:'Noto Serif SC',serif;color:var(--mực);display:block}
.minhhoa .thẻ2 span{display:block;color:var(--son);font-weight:700;margin-bottom:6px}
.minhhoa .bước{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;text-align:center}
@media(max-width:620px){.minhhoa .bước{grid-template-columns:1fr 1fr}}
.minhhoa .bước div{background:rgba(255,255,255,.08);border-radius:12px;padding:10px 6px;font-size:13.5px}
.minhhoa .bước b{display:block;font-size:22px;color:#C9A86A}
.dẫn{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:26px 0}
@media(max-width:560px){.dẫn{grid-template-columns:1fr}}
.dẫn a{display:block;text-decoration:none;background:#fff;border:1px solid var(--viền);border-left:5px solid var(--son);border-radius:12px;padding:14px 16px;color:var(--chữ)}
.dẫn a b{display:block;color:var(--mực);margin-bottom:2px}.dẫn a span{font-size:14.5px;color:var(--phụ)}
.liênquan{margin:30px 0 10px}.liênquan h3{font-size:20px;margin-bottom:10px}
.liênquan a{display:block;padding:10px 0;border-bottom:1px solid var(--viền);text-decoration:none;color:var(--mực);font-weight:600}
@media(max-width:620px){
  header.top .wrap{flex-wrap:wrap;height:auto;padding-top:8px;padding-bottom:6px;row-gap:4px}
  header.top nav{order:3;width:100%;justify-content:center;gap:18px;font-size:14px}
  header.top img{height:38px}
  header.top .nút{padding:8px 14px!important;font-size:13px!important}
}
@media(max-width:620px){.minhhoa .hàng:has(.cặp){flex-wrap:nowrap;gap:8px}.minhhoa .cặp{min-width:0;flex:1;padding:10px 4px}.minhhoa .chữ{font-size:28px}.minhhoa .chữ .mũi{font-size:15px;margin:0 3px}}