#main{padding-top:var(--header-h)}
.nav-link[aria-current],.drawer a[aria-current]{color:var(--brand-700);background:var(--brand-50)}

/* ---------- breadcrumb: một dòng trong trang ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin-bottom:clamp(20px,2.2vw,30px);font-size:.8rem;color:var(--muted)}
.crumb li{display:flex;align-items:center;gap:8px;min-width:0}
.crumb li+li::before{content:"";flex:none;width:5px;height:5px;border-top:1.5px solid var(--line-2);
  border-right:1.5px solid var(--line-2);transform:rotate(45deg)}
.crumb a{color:var(--ink-2);font-weight:500}
.crumb a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.crumb [aria-current]{color:var(--ink);font-weight:600;overflow:hidden;text-overflow:ellipsis;
  white-space:nowrap}

/* ---------- ảnh bìa dựng bằng CSS ---------- */
.cover{position:relative;overflow:hidden;background:var(--cv1);
  display:grid;place-items:center;isolation:isolate}
.cover::before{content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,var(--cv1),var(--cv2))}
.cover::after{content:"";position:absolute;inset:0;opacity:.16;
  background-image:linear-gradient(rgba(255,255,255,.9) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:34px 34px;
  mask-image:radial-gradient(70% 70% at 70% 20%,#000,transparent 78%);
  -webkit-mask-image:radial-gradient(70% 70% at 70% 20%,#000,transparent 78%)}
.cover .cv-ic{position:relative;z-index:1;color:rgba(255,255,255,.92);
  filter:drop-shadow(0 6px 16px rgba(0,0,0,.28))}
.cover .cat{position:absolute;z-index:2;top:12px;left:12px;
  padding:5px 11px;border-radius:999px;background:rgba(255,255,255,.94);
  color:var(--ink);font-size:.7rem;font-weight:700;letter-spacing:.01em}
/* Ảnh bìa thật (D22) — thay cho gradient+icon khi bài viết có chọn ảnh. */
.cover img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}

/* ---------- đầu trang danh sách ---------- */
#tin-dau{background:linear-gradient(180deg,var(--brand-50),#fff 80%);
  padding-block:clamp(26px,3vw,40px) clamp(34px,3.6vw,52px)}
.nh{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:26px;align-items:end}
.nh h1{font-size:clamp(1.85rem,1.35rem + 1.9vw,2.7rem);margin-bottom:12px}
.nh p{color:var(--ink-2);font-size:var(--fs-lead);max-width:44rem}
.nsearch{display:flex;align-items:center;gap:9px;flex:none;width:min(320px,100%);
  padding:11px 15px;background:#fff;border:1px solid var(--line-2);border-radius:12px;
  box-shadow:var(--sh-xs);transition:.2s var(--ease)}
.nsearch:focus-within{border-color:var(--brand-300);box-shadow:0 0 0 4px var(--brand-50)}
.nsearch .ic{flex:none;color:var(--muted);font-size:17px}
.nsearch input{flex:1;min-width:0;border:0;background:none;font-size:.92rem}
.nsearch input:focus{outline:none}
.nsearch button{flex:none;font-size:.85rem;font-weight:600;color:var(--brand-600)}
@media (max-width:820px){.nh{grid-template-columns:1fr}.nsearch{width:100%}}

/* ---------- bài nổi bật ---------- */
#tin-noi-bat{padding-block:0 clamp(40px,4.4vw,64px);background:#fff}
.feat-art{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;
  box-shadow:var(--sh-md);transition:transform .26s var(--ease),box-shadow .26s var(--ease)}
.feat-art:hover{transform:translateY(-4px);box-shadow:var(--sh-lg)}
.feat-art .cover{min-height:290px}
.feat-art .cover .cv-ic{font-size:4.6rem}
.feat-art .fa-body{padding:clamp(24px,2.6vw,38px);display:flex;flex-direction:column;
  justify-content:center;min-width:0}
.fa-tag{display:inline-flex;align-items:center;gap:7px;align-self:flex-start;margin-bottom:14px;
  padding:5px 12px;border-radius:999px;background:var(--warn-bg);color:var(--warn);
  font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase}
.feat-art h2{font-size:clamp(1.3rem,1.05rem + 1vw,1.85rem);margin-bottom:12px}
.feat-art p{color:var(--ink-2);font-size:1rem;margin-bottom:18px}
.ameta{display:flex;flex-wrap:wrap;align-items:center;gap:7px 14px;
  font-size:.82rem;color:var(--muted)}
.ameta span{display:inline-flex;align-items:center;gap:6px}
.ameta .ic{font-size:14px}
.ameta .sep{width:4px;height:4px;border-radius:50%;background:var(--line-2)}
.feat-art .link-more{margin-top:20px;display:inline-flex;align-items:center;gap:8px;
  font-weight:600;color:var(--brand-600)}
.feat-art:hover .link-more .ic-arrow{transform:translateX(3px)}
.feat-art .link-more .ic{transition:transform .22s var(--ease)}
@media (max-width:860px){.feat-art{grid-template-columns:1fr}.feat-art .cover{min-height:190px}}

/* ---------- lọc chuyên mục ---------- */
#tin-danh-sach{background:var(--bg-soft);border-top:1px solid var(--line)}
.filter-bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  margin-bottom:clamp(22px,2.4vw,32px)}
.chips{display:flex;gap:8px;flex-wrap:wrap;flex:1;min-width:0}
.chips button{padding:9px 16px;border-radius:999px;background:#fff;border:1px solid var(--line-2);
  font-size:.87rem;font-weight:500;color:var(--ink-2);white-space:nowrap;transition:.2s var(--ease)}
.chips button:hover{border-color:var(--brand-300);color:var(--brand-700)}
.chips button[aria-pressed="true"]{background:var(--brand-500);border-color:var(--brand-500);
  color:#fff;font-weight:600}
.chips button b{font-weight:inherit;opacity:.6;margin-left:5px}
.filter-count{flex:none;font-size:.85rem;color:var(--muted)}

/* ---------- lưới bài viết ---------- */
.arts{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(16px,1.8vw,24px)}
.art{position:relative;display:flex;flex-direction:column;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease)}
.art:hover{transform:translateY(-5px);box-shadow:var(--sh-md);border-color:var(--brand-200)}
.art .cover{aspect-ratio:16/9}
.art .cover .cv-ic{font-size:2.5rem}
.art-body{padding:20px;display:flex;flex-direction:column;flex:1;min-width:0}
.art h3{font-size:1.04rem;line-height:1.4;margin-bottom:9px}
.art:hover h3{color:var(--brand-700)}
.art p{font-size:.9rem;color:var(--ink-2);margin-bottom:16px;flex:1}
.art .ameta{font-size:.79rem}
.art .card-link{position:absolute;inset:0;border-radius:inherit}
.arts .art[hidden]{display:none}
.no-result{padding:44px 20px;text-align:center;color:var(--muted);font-size:.95rem;
  background:#fff;border:1px dashed var(--line-2);border-radius:var(--r-lg)}
.no-result b{display:block;font-family:var(--font-head);color:var(--ink);font-size:1.05rem;
  margin-bottom:6px}
.load-more{display:flex;justify-content:center;margin-top:clamp(26px,3vw,40px)}
@media (max-width:980px){.arts{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.arts{grid-template-columns:1fr}}

/* ---------- đăng ký nhận bài ---------- */
.nlx{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);
  gap:clamp(22px,2.6vw,42px);align-items:center;
  background:var(--grad-brand);color:#fff;border-radius:var(--r-xl);
  padding:clamp(28px,3.2vw,46px);position:relative;overflow:hidden;isolation:isolate}
.nlx::before{content:"";position:absolute;z-index:-1;width:400px;height:400px;border-radius:50%;
  top:-170px;right:-110px;background:radial-gradient(circle,rgba(255,255,255,.18),transparent 62%)}
.nlx h2{color:#fff;font-size:clamp(1.35rem,1.1rem + 1vw,1.85rem);margin-bottom:10px}
.nlx p{color:#dbe5ff;font-size:.98rem}
.nl-form{display:grid;gap:10px}
.nl-row{display:flex;gap:10px;flex-wrap:wrap}
.nl-row input{flex:1;min-width:190px;padding:14px 16px;border-radius:12px;
  border:1px solid rgba(255,255,255,.34);background:rgba(255,255,255,.12);color:#fff;
  font-size:.95rem}
.nl-row input::placeholder{color:#c3d2f8}
.nl-row input:focus{outline:none;border-color:#fff;background:rgba(255,255,255,.2)}
.nl-note{font-size:.8rem;color:#c3d2f8}
.nl-note a{color:#fff;text-decoration:underline;text-underline-offset:3px}
.nl-ok{display:none;align-items:center;gap:11px;padding:15px 18px;border-radius:12px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);font-size:.93rem}
.nl-ok.show{display:flex}
.nl-ok .ic{flex:none;color:#8ef0be;font-size:19px;stroke-width:2.6}
@media (max-width:860px){.nlx{grid-template-columns:1fr}}

/* ============================================================
   TRANG BÀI VIẾT
   ============================================================ */
#bai-viet{padding-block:clamp(26px,3vw,40px) 0;background:#fff}
.ah{max-width:52rem}
.ah-cat{display:inline-flex;align-items:center;gap:8px;margin-bottom:16px;
  padding:6px 14px;border-radius:999px;font-size:.74rem;font-weight:700;
  letter-spacing:.06em;text-transform:uppercase;color:#fff;background:var(--cv1)}
.ah h1{font-size:clamp(1.75rem,1.3rem + 1.9vw,2.6rem);margin-bottom:16px}
.ah .lead{color:var(--ink-2);font-size:var(--fs-lead);margin-bottom:22px}
.ah-bar{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:15px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.ah-who{display:flex;align-items:center;gap:11px;min-width:0}
.ah-who .av{flex:none;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-50);color:var(--brand-700);border:1px solid var(--brand-100);
  font-family:var(--font-head);font-weight:700;font-size:.8rem}
.ah-who b{display:block;font-size:.88rem;line-height:1.35}
.share{display:flex;align-items:center;gap:8px;flex:none}
.share span{font-size:.8rem;color:var(--muted);margin-right:2px}
.share a,.share button{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--bg-soft);border:1px solid var(--line);color:var(--ink-2);font-size:15px;
  transition:.2s var(--ease)}
.share a:hover,.share button:hover{background:var(--brand-50);border-color:var(--brand-300);
  color:var(--brand-700);transform:translateY(-2px)}
.share .copied{position:relative}
.share .copied::after{content:"Đã sao chép";position:absolute;bottom:calc(100% + 8px);right:0;
  padding:5px 10px;border-radius:8px;background:var(--ink);color:#fff;font-size:.72rem;
  font-weight:600;white-space:nowrap;opacity:0;transform:translateY(4px);
  transition:.2s var(--ease);pointer-events:none}
.share .copied.on::after{opacity:1;transform:none}

.ah-cover{margin-top:clamp(24px,2.6vw,36px);border-radius:var(--r-lg);
  aspect-ratio:21/9;min-height:180px}
.ah-cover .cv-ic{font-size:clamp(3rem,2rem + 3vw,4.6rem)}

/* thân bài: mục lục ghim dọc bên trái + nội dung bên phải */
.abody{display:grid;grid-template-columns:220px minmax(0,1fr);
  gap:clamp(28px,3.4vw,56px);align-items:start;
  padding-block:clamp(34px,3.8vw,56px)}
.toc{position:sticky;top:calc(var(--header-h) + 24px)}
.toc b{display:block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted);padding-bottom:11px;border-bottom:1px solid var(--line);margin-bottom:11px}
.toc ol{display:grid;gap:1px;counter-reset:toc}
.toc a{display:flex;gap:9px;padding:7px 10px;border-radius:8px;font-size:.85rem;
  color:var(--ink-2);line-height:1.45;transition:.18s var(--ease)}
.toc a::before{counter-increment:toc;content:counter(toc);flex:none;
  font-family:var(--font-head);font-size:.74rem;font-weight:700;color:var(--line-2);margin-top:1px}
.toc a:hover{background:var(--bg-soft);color:var(--brand-700)}
.toc a:hover::before{color:var(--brand-500)}
.toc a.on{background:var(--brand-50);color:var(--brand-700);font-weight:600}
.toc a.on::before{color:var(--brand-500)}
.toc-cta{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}

.prose{max-width:44rem;font-size:1.02rem;line-height:1.78;color:var(--ink-2)}
.prose>*+*{margin-top:20px}
.prose h2{font-size:clamp(1.24rem,1.08rem + .6vw,1.5rem);color:var(--ink);
  margin-top:38px;scroll-margin-top:calc(var(--header-h) + 24px)}
.prose h2:first-child{margin-top:0}
.prose b,.prose strong{color:var(--ink);font-weight:600}
.prose ul,.prose ol{display:grid;gap:11px;padding-left:2px}
.prose li{display:flex;gap:12px}
.prose ul li::before{content:"";flex:none;width:6px;height:6px;margin-top:11px;border-radius:50%;
  background:var(--brand-300)}
.prose ol{counter-reset:pl}
.prose ol li::before{counter-increment:pl;content:counter(pl);flex:none;width:23px;height:23px;
  margin-top:3px;border-radius:7px;display:grid;place-items:center;background:var(--brand-50);
  color:var(--brand-700);font-family:var(--font-head);font-size:.74rem;font-weight:700}
.prose .callout{display:flex;gap:13px;padding:18px 20px;border-radius:var(--r);
  background:var(--brand-50);border-left:3px solid var(--brand-500);font-size:.96rem;
  line-height:1.68;color:var(--ink-2)}
.prose .callout .ic{flex:none;margin-top:4px;color:var(--brand-600);font-size:17px}
.prose blockquote{padding:4px 0 4px 22px;border-left:3px solid var(--brand-200);
  font-family:var(--font-head);font-size:clamp(1.08rem,1rem + .35vw,1.24rem);line-height:1.55;
  color:var(--ink);font-weight:600;letter-spacing:-.01em}
.prose blockquote cite{display:block;margin-top:12px;font-family:var(--font-body);font-size:.85rem;
  font-weight:500;font-style:normal;color:var(--muted);letter-spacing:0}
.prose-tb{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff}
.prose-tb table{width:100%;min-width:440px;border-collapse:collapse;font-size:.92rem}
.prose-tb th,.prose-tb td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);
  line-height:1.55}
.prose-tb tr:last-child td{border-bottom:0}
.prose-tb thead th{background:var(--bg-soft);font-family:var(--font-head);font-size:.8rem;
  font-weight:700;color:var(--ink);border-bottom:1px solid var(--line-2)}
.prose-tb td:first-child{color:var(--ink);font-weight:500}

/* module liên quan trong bài — đúng luồng §18.2 của đặc tả */
.mod-link{display:flex;align-items:center;gap:16px;margin-top:34px;
  padding:20px 22px;background:var(--bg-soft);border:1px solid var(--line);
  border-radius:var(--r-lg);transition:.24s var(--ease)}
.mod-link:hover{background:var(--brand-50);border-color:var(--brand-300);transform:translateY(-2px)}
.mod-link .mi{flex:none;width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  background:var(--grad-brand);color:#fff;font-size:1.2rem}
.mod-link-t{flex:1;min-width:0}
.mod-link-t span{display:block;font-size:.74rem;font-weight:700;letter-spacing:.07em;
  text-transform:uppercase;color:var(--brand-600);margin-bottom:3px}
.mod-link-t b{display:block;font-family:var(--font-head);font-size:1.04rem;line-height:1.35}
.mod-link>.ic{flex:none;color:var(--brand-500);font-size:19px;transition:transform .22s var(--ease)}
.mod-link:hover>.ic{transform:translateX(4px)}
@media (max-width:900px){
  .abody{grid-template-columns:1fr;gap:0}
  .toc{position:static;margin-bottom:30px;padding:18px 20px;background:var(--bg-soft);
    border:1px solid var(--line);border-radius:var(--r-lg)}
  .toc-cta{display:none}
  .prose{max-width:none}
}

/* bài liên quan + CTA */
#lien-quan{background:var(--bg-soft);border-top:1px solid var(--line)}
.sec-bar{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  flex-wrap:wrap;margin-bottom:clamp(26px,3vw,40px)}
.sec-bar .sec-head{margin-bottom:0;margin-inline:0;text-align:left;max-width:40rem}
.sec-bar>.link-more{flex:none;display:inline-flex;align-items:center;gap:8px;
  padding:11px 18px;border:1px solid var(--line-2);border-radius:11px;background:#fff;
  font-size:.9rem;font-weight:600;color:var(--ink);transition:.22s var(--ease)}
.sec-bar>.link-more:hover{border-color:var(--brand-300);color:var(--brand-700);
  background:var(--brand-50);transform:translateY(-2px)}
.sec-bar>.link-more:hover .ic-arrow{transform:translateX(3px)}
.sec-bar>.link-more .ic{transition:transform .22s var(--ease)}
.arts--3{grid-template-columns:repeat(3,1fr)}
@media (max-width:980px){.arts--3{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.arts--3{grid-template-columns:1fr}}

.page-cta{position:relative;overflow:hidden;isolation:isolate;
  background:var(--grad-brand);color:#fff;border-radius:var(--r-xl);
  padding:clamp(30px,3.4vw,52px);display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);
  gap:clamp(22px,2.6vw,40px);align-items:center}
.page-cta::before{content:"";position:absolute;z-index:-1;width:420px;height:420px;border-radius:50%;
  top:-190px;right:-130px;background:radial-gradient(circle,rgba(255,255,255,.18),transparent 62%)}
.page-cta h2{color:#fff;margin-bottom:12px;font-size:clamp(1.45rem,1.1rem + 1.1vw,2rem)}
.page-cta p{color:#dbe5ff;font-size:1rem}
.page-cta-acts{display:grid;gap:11px}
.page-cta-note{margin-top:6px;font-size:.82rem;color:#c3d2f8;text-align:center}
@media (max-width:860px){.page-cta{grid-template-columns:1fr}}