/* ============================================================
   DEN HUNG - mẫu 1455
   Cội nguồn vững, ý chí mới bền
   Phông chữ: Literata tiêu đề, Hanken Grotesk nội dung.
   ============================================================ */
/* ---------- Thanh điều hướng ---------- */

:root {
  --dhu-menuy: #345c16;
  --dhu-menuy-deep: #1c300b;
  --dhu-menuy-mid: #497a22;
  --dhu-menuy-soft: #eef1fa;
  --dhu-coral: #4d5aff;
  --dhu-coral-dark: #3845e2;
  --dhu-coral-soft: #fff1ed;
  --dhu-gold: #9e51f5;
  --dhu-ink: #2b3f17;
  --dhu-ink-2: #55743c;
  --dhu-ink-3: #839e6c;
  --dhu-line: #ecf6e3;
  --dhu-bg: #f5f7fc;
  --dhu-white: #ffffff;
  --dhu-radius: 16px;
  --dhu-radius-sm: 11px;
  --dhu-shadow: 0 18px 42px rgb(41,74,17, 0.10);
  --dhu-shadow-sm: 0 8px 22px rgb(41,74,17, 0.07);
  --dhu-font: 'Hanken Grotesk', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --dhu-display: 'Literata', 'Hanken Grotesk', system-ui, sans-serif;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--dhu-font);
  font-size: 16px;
  line-height: 1.72;
  color: var(--dhu-ink-2);
  background: var(--dhu-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {height:auto; max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-family: var(--dhu-display); font-weight: 700; color: var(--dhu-menuy); line-height: 1.25; }
p { margin: 0; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--dhu-coral); outline-offset: 2px; }

.dhu-shell { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.dhu-skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--dhu-coral); color: #fff; padding: 12px 20px; border-radius: 0 0 10px 0; font-weight: 600;
}
.dhu-skip:focus { left: 0; }

/* ---------- Nút bấm ---------- */
.dhu-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; border: 1px solid transparent;
  font-family: var(--dhu-display); font-size: 15.5px; font-weight: 700; letter-spacing: 0.2px;
  transition: transform 0.22s ease, background 0.22s ease, color 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  cursor: pointer;
}
.dhu-btn b { font-weight: 700; transition: transform 0.22s ease; }
.dhu-btn:hover b { transform: translateX(3px); }
.dhu-btn-coral { background: var(--dhu-coral); color: #fff; box-shadow: 0 10px 24px rgb(77,90,255, 0.30); }
.dhu-btn-coral:hover { background: var(--dhu-coral-dark); transform: translateY(-2px); }
.dhu-btn-navy { background: var(--dhu-menuy); color: #fff; box-shadow: 0 10px 24px rgb(52,92,22, 0.24); }
.dhu-btn-navy:hover { background: var(--dhu-menuy-mid); transform: translateY(-2px); }
.dhu-btn-ghost { background: rgba(255, 255, 255, 0.10); color: #fff; border-color: rgba(255, 255, 255, 0.45); }
.dhu-btn-ghost:hover { background: rgba(255, 255, 255, 0.20); border-color: #fff; }
.dhu-btn-outline { background: transparent; color: var(--dhu-menuy); border-color: var(--dhu-line); }
.dhu-btn-outline:hover { border-color: var(--dhu-coral); color: var(--dhu-coral); }

/* ---------- Đầu trang ---------- */
.dhu-header {
  position: sticky; top: 0; z-index: 60;
  background: var(--dhu-menuy);
  box-shadow: 0 6px 20px rgb(28,48,11, 0.18);
}
.dhu-header-line { display: flex; align-items: center; gap: 26px; height: 76px; }
.dhu-brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.dhu-brand-img { width: 208px; height: 48px; object-fit: contain; object-position: left center; }
.dhu-menu { margin-left: auto; }
.dhu-menu-list { display: flex; align-items: center; gap: 4px; }
.dhu-menu-a {
  position: relative; display: inline-block;
  padding: 10px 15px; border-radius: 10px;
  font-family: var(--dhu-display); font-size: 15px; font-weight: 600; letter-spacing: 0.2px;
  color: rgba(255, 255, 255, 0.86);
  transition: color 0.2s ease, background 0.2s ease;
}
.dhu-menu-a::after {
  content: ''; position: absolute; left: 15px; right: 15px; bottom: 4px; height: 2px;
  background: var(--dhu-coral); border-radius: 2px;
  transform: scaleX(0); transform-origin: left center; transition: transform 0.26s ease;
}
.dhu-menu-a:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
.dhu-menu-a:hover::after, .dhu-menu-a.is-active::after { transform: scaleX(1); }
.dhu-menu-a.is-active { color: #fff; }
.dhu-burger {
  display: none; margin-left: auto; width: 46px; height: 46px; padding: 0;
  background: rgba(255, 255, 255, 0.10); border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 12px; cursor: pointer;
}
.dhu-burger span {
  display: block; width: 22px; height: 2px; margin: 4px auto; border-radius: 2px;
  background: #fff; transition: transform 0.26s ease, opacity 0.2s ease;
}
.dhu-burger.is-on span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.dhu-burger.is-on span:nth-child(2) { opacity: 0; }
.dhu-burger.is-on span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.dhu-mask {
  display: none; position: fixed; inset: 0; z-index: 55;
  background: rgb(21,38,8, 0.55); opacity: 0; visibility: hidden;
  transition: opacity 0.28s ease, visibility 0.28s ease;
}
.dhu-mask.is-show { opacity: 1; visibility: visible; }
body.dhu-locked { overflow: hidden; }

/* ---------- Khu vực chính ---------- */
.dhu-hero { position: relative; background: var(--dhu-menuy-deep); padding: 92px 0 0; }
.dhu-hero-bg { position: absolute; inset: 0; z-index: 0; }
.dhu-hero-img { width: 100%; height: 100%; object-fit: cover; }
.dhu-hero::before {
  content: ''; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(105deg, rgb(28,48,11, 0.94) 0%, rgb(28,48,11, 0.72) 46%, rgb(52,92,22, 0.42) 100%);
}
.dhu-hero-inner { position: relative; z-index: 2; padding: 0 0 74px; max-width: 1240px; }
.dhu-hero-kicker {
  display: inline-block; margin-bottom: 18px; padding: 7px 16px; border-radius: 999px;
  background: rgb(77,90,255, 0.16); border: 1px solid rgb(77,90,255, 0.45);
  color: #a8abff; font-size: 13px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase;
}
.dhu-hero-title {
  max-width: 20ch; font-size: clamp(34px, 4.4vw, 58px); font-weight: 800; line-height: 1.12;
  color: #fff; letter-spacing: -0.5px;
}
.dhu-hero-desc { max-width: 62ch; margin-top: 20px; font-size: 17px; line-height: 1.78; color: rgb(238,250,226, 0.88); }
.dhu-hero-acts { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.dhu-hero-stats {
  position: relative; z-index: 3;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0;
  margin: 0; padding: 0;
  background: var(--dhu-white); border-radius: var(--dhu-radius);
  box-shadow: var(--dhu-shadow); overflow: hidden;
  transform: translateY(38px);
}
.dhu-hero-stats li {
  padding: 24px 26px; border-right: 1px solid var(--dhu-line);
  display: flex; flex-direction: column; gap: 4px;
}
.dhu-hero-stats li:last-child { border-right: 0; }
.dhu-hero-stats strong {
  font-family: var(--dhu-display); font-size: 30px; font-weight: 800; color: var(--dhu-menuy); line-height: 1.1;
}
.dhu-hero-stats span { font-size: 14px; color: var(--dhu-ink-3); }

/* ---------- Khốis ---------- */
.dhu-section { padding: 74px 0; }
.dhu-section-soft { background: #eef1fa; }
.dhu-section:first-of-type { padding-top: 92px; }
.dhu-head { max-width: 68ch; margin-bottom: 34px; }
.dhu-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; max-width: none; }
.dhu-head-row > div { max-width: 68ch; }
.dhu-kicker {
  margin-bottom: 10px; font-family: var(--dhu-display);
  font-size: 13px; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase; color: var(--dhu-coral);
}
.dhu-h2 { font-size: clamp(26px, 2.6vw, 36px); font-weight: 800; letter-spacing: -0.3px; }
.dhu-head-desc { margin-top: 12px; font-size: 16.5px; line-height: 1.75; color: var(--dhu-ink-3); }
.dhu-head-link {
  flex: 0 0 auto; display: inline-flex; align-items: center; gap: 7px;
  padding: 10px 20px; border-radius: 999px; border: 1px solid var(--dhu-line); background: #fff;
  font-family: var(--dhu-display); font-size: 14.5px; font-weight: 700; color: var(--dhu-menuy);
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.dhu-head-link:hover { border-color: var(--dhu-coral); color: var(--dhu-coral); transform: translateY(-2px); }
.dhu-head-link b { transition: transform 0.2s ease; }
.dhu-head-link:hover b { transform: translateX(3px); }

/* ---------- Lưới + Thẻ ---------- */
.dhu-grid { display: grid; gap: 26px; }
.dhu-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.dhu-card {
  background: var(--dhu-white); border: 1px solid var(--dhu-line); border-radius: var(--dhu-radius);
  overflow: hidden; transition: transform 0.26s ease, box-shadow 0.26s ease, border-color 0.26s ease;
}
.dhu-card:hover { transform: translateY(-5px); box-shadow: var(--dhu-shadow); border-color: #dcf1c9; }
.dhu-card-link { display: flex; flex-direction: column; height: 100%; }
.dhu-card-media { display: block; overflow: hidden; background: var(--dhu-menuy-soft); aspect-ratio: 4 / 3; }
.dhu-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.dhu-card:hover .dhu-card-media img { transform: scale(1.06); }
.dhu-card-body { display: flex; flex-direction: column; gap: 9px; padding: 18px 19px 20px; }
.dhu-card-cat {
  display: flex; align-items: center; gap: 7px;
  font-size: 12.5px; font-weight: 600; letter-spacing: 0.3px; color: var(--dhu-coral);
}
.dhu-card-cat time { color: var(--dhu-ink-3); font-weight: 400; }
.dhu-card-cat i { font-style: normal; color: #cbe0b9; }
.dhu-card-title {
  font-family: var(--dhu-display); font-size: 17.5px; font-weight: 700; line-height: 1.38; color: var(--dhu-menuy);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.dhu-card-desc {
  font-size: 14.5px; line-height: 1.7; color: var(--dhu-ink-3);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.dhu-more {
  margin-top: auto; padding-top: 6px;
  font-family: var(--dhu-display); font-size: 14px; font-weight: 700; color: var(--dhu-menuy);
}
.dhu-card:hover .dhu-more { color: var(--dhu-coral); }

/* ---------- Đầuic hexagons ---------- */
.dhu-topic-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 30px 26px; }
.dhu-topic { display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }
.dhu-topic-hex {
  width: 100%; max-width: 178px; aspect-ratio: 1 / 1; overflow: hidden;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  background: var(--dhu-menuy); transition: transform 0.3s ease;
}
.dhu-topic-hex img { width: 100%; height: 100%; object-fit: cover; }
.dhu-topic:hover .dhu-topic-hex { transform: translateY(-6px) scale(1.03); }
.dhu-topic-name {
  font-family: var(--dhu-display); font-size: 18px; font-weight: 700; color: var(--dhu-menuy);
}
.dhu-topic-more { font-size: 13.5px; font-weight: 600; color: var(--dhu-ink-3); opacity: 0; transition: opacity 0.24s ease; }
.dhu-topic:hover .dhu-topic-more { opacity: 1; color: var(--dhu-coral); }

/* ---------- lead block ---------- */
.dhu-lead-wrap { display: grid; grid-template-columns: 1.55fr 1fr; gap: 30px; align-items: start; }
.dhu-lead {
  background: var(--dhu-white); border: 1px solid var(--dhu-line); border-radius: var(--dhu-radius);
  overflow: hidden; box-shadow: var(--dhu-shadow-sm);
}
.dhu-lead-link { display: block; }
.dhu-lead-media { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: var(--dhu-menuy-soft); }
.dhu-lead-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.dhu-lead:hover .dhu-lead-media img { transform: scale(1.05); }
.dhu-lead-body { display: flex; flex-direction: column; gap: 11px; padding: 24px 26px 26px; }
.dhu-lead-title {
  font-family: var(--dhu-display); font-size: clamp(21px, 2vw, 27px); font-weight: 800; line-height: 1.3; color: var(--dhu-menuy);
}
.dhu-lead:hover .dhu-lead-title { color: var(--dhu-coral); }
.dhu-lead-desc { font-size: 15.5px; line-height: 1.75; color: var(--dhu-ink-3); }
.dhu-lead-list li + li { margin-top: 2px; }
.dhu-lead-list a {
  display: grid; grid-template-columns: 92px 1fr; gap: 15px; align-items: center;
  padding: 14px 16px; border-radius: var(--dhu-radius-sm); background: var(--dhu-white);
  border: 1px solid var(--dhu-line); transition: border-color 0.22s ease, transform 0.22s ease;
}
.dhu-lead-list a:hover { border-color: var(--dhu-coral); transform: translateX(3px); }
.dhu-lead-thumb { display: block; width: 92px; height: 72px; overflow: hidden; border-radius: 9px; background: var(--dhu-menuy-soft); }
.dhu-lead-thumb img { width: 100%; height: 100%; object-fit: cover; }
.dhu-lead-text { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.dhu-lead-text strong {
  font-family: var(--dhu-display); font-size: 16px; font-weight: 700; line-height: 1.4; color: var(--dhu-menuy);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.dhu-lead-text time { font-size: 13px; color: var(--dhu-ink-3); }

/* ---------- horizontal track ---------- */
.dhu-track {
  display: flex; gap: 22px; overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 6px 24px 22px; scroll-padding-left: 24px;
  scrollbar-width: thin; scrollbar-color: #d6edc3 transparent;
}
.dhu-track::-webkit-scrollbar { height: 8px; }
.dhu-track::-webkit-scrollbar-thumb { background: #d6edc3; border-radius: 8px; }
.dhu-track-card { flex: 0 0 clamp(250px, 24vw, 320px); scroll-snap-align: start; }

/* ---------- Giới thiệu ---------- */
.dhu-about-wrap { display: grid; grid-template-columns: 1fr 1.05fr; gap: 46px; align-items: center; }
.dhu-about-media { border-radius: var(--dhu-radius); overflow: hidden; box-shadow: var(--dhu-shadow); }
.dhu-about-media img { width: 100%; }
.dhu-about-copy { min-width: 0; }
.dhu-about-desc { margin-top: 14px; font-size: 16.5px; line-height: 1.8; color: var(--dhu-ink-2); }
.dhu-about-facts { margin: 26px 0 30px; display: flex; flex-direction: column; gap: 12px; }
.dhu-about-facts li {
  display: grid; grid-template-columns: 52px 1fr; gap: 14px; align-items: center;
  padding: 14px 18px; border-radius: var(--dhu-radius-sm); background: var(--dhu-white); border: 1px solid var(--dhu-line);
}
.dhu-fact-num { font-family: var(--dhu-display); font-size: 21px; font-weight: 800; color: var(--dhu-coral); }
.dhu-fact-text { font-size: 15px; line-height: 1.6; color: var(--dhu-ink-2); }

/* ---------- Hỏi đáp ---------- */
.dhu-faq-wrap { display: grid; grid-template-columns: 0.85fr 1.35fr; gap: 46px; align-items: start; }
.dhu-faq-intro { position: sticky; top: 104px; }
.dhu-faq-note { margin: 14px 0 24px; font-size: 16px; line-height: 1.75; color: var(--dhu-ink-3); }
.dhu-faq-item { background: var(--dhu-white); border: 1px solid var(--dhu-line); border-radius: var(--dhu-radius-sm); overflow: hidden; }
.dhu-faq-item + .dhu-faq-item { margin-top: 12px; }
.dhu-faq-h { font-size: inherit; margin: 0; }
.dhu-faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 18px;
  padding: 19px 22px; background: none; border: 0; text-align: left; cursor: pointer;
  font-family: var(--dhu-display); font-size: 16.5px; font-weight: 700; color: var(--dhu-menuy);
  transition: color 0.2s ease;
}
.dhu-faq-q:hover { color: var(--dhu-coral); }
.dhu-faq-q i {
  flex: 0 0 auto; position: relative; width: 26px; height: 26px; border-radius: 50%;
  background: var(--dhu-menuy-soft); transition: background 0.24s ease, transform 0.28s ease;
}
.dhu-faq-q i::before, .dhu-faq-q i::after {
  content: ''; position: absolute; left: 50%; top: 50%; background: var(--dhu-menuy);
  transform: translate(-50%, -50%); transition: transform 0.28s ease, background 0.24s ease;
}
.dhu-faq-q i::before { width: 11px; height: 2px; }
.dhu-faq-q i::after { width: 2px; height: 11px; }
.dhu-faq-q[aria-expanded="true"] { color: var(--dhu-coral); }
.dhu-faq-q[aria-expanded="true"] i { background: var(--dhu-coral); transform: rotate(180deg); }
.dhu-faq-q[aria-expanded="true"] i::before, .dhu-faq-q[aria-expanded="true"] i::after { background: #fff; }
.dhu-faq-q[aria-expanded="true"] i::after { transform: translate(-50%, -50%) scaleY(0); }
.dhu-faq-a { padding: 0 22px 22px; }
.dhu-faq-a p { font-size: 15.5px; line-height: 1.8; color: var(--dhu-ink-2); }

/* ---------- friend links ---------- */
.dhu-flink { background: var(--dhu-white); border-top: 1px solid var(--dhu-line); padding: 54px 0 46px; }
.dhu-flink-head { margin-bottom: 26px; }
.dhu-flink-title { font-size: 24px; font-weight: 800; }
.dhu-flink-note { margin-top: 8px; font-size: 15px; color: var(--dhu-ink-3); }
.dhu-flink-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 18px; }
.dhu-flink-item {
  display: flex; flex-direction: column; align-items: center; gap: 11px;
  padding: 20px 12px; border-radius: var(--dhu-radius-sm); border: 1px solid var(--dhu-line);
  background: var(--dhu-bg); transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}
.dhu-flink-item:hover { transform: translateY(-4px); border-color: #dcf1c9; box-shadow: var(--dhu-shadow-sm); }
.dhu-flink-icon {
  width: 66px; height: 66px; display: flex; align-items: center; justify-content: center;
  border-radius: 14px; overflow: hidden;
}
.dhu-flink-logo { width: 100%; height: 100%; object-fit: contain; }
.dhu-flink-name {
  font-family: var(--dhu-display); font-size: 14.5px; font-weight: 700; color: var(--dhu-menuy); text-align: center;
}

/* ---------- Chân trang ---------- */
.dhu-footer { background: var(--dhu-menuy-deep); color: #c2ddaa; margin-top: 0; }
.dhu-foot-grid {
  display: grid; grid-template-columns: 1.5fr 1.15fr 0.95fr 1.1fr; gap: 36px;
  padding: 52px 0 34px;
}
.dhu-foot-brand, .dhu-foot-col { min-width: 0; }
.dhu-brand-foot { margin-bottom: 16px; }
.dhu-brand-foot .dhu-brand-img { width: 216px; height: 50px; }
.dhu-foot-about { font-size: 14.5px; line-height: 1.8; color: #afcf93; max-width: 42ch; }
.dhu-foot-h {
  margin-bottom: 16px; font-family: var(--dhu-display); font-size: 15px; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase; color: #fff;
}
.dhu-foot-list { display: flex; flex-direction: column; gap: 9px; }
.dhu-foot-list a {
  display: inline-block; font-size: 14.5px; color: #c2ddaa;
  transition: color 0.2s ease, transform 0.2s ease;
}
.dhu-foot-list a:hover { color: var(--dhu-gold); transform: translateX(3px); }
.dhu-foot-cats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px 16px; }
.dhu-foot-info { display: flex; flex-direction: column; gap: 12px; }
.dhu-foot-info li { display: flex; flex-direction: column; gap: 2px; }
.dhu-foot-key { font-size: 12.5px; letter-spacing: 0.6px; text-transform: uppercase; color: #8bb06f; }
.dhu-foot-val { font-size: 14.5px; line-height: 1.65; color: #e0f4cf; }
.dhu-foot-base {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  padding: 22px 0 34px; border-top: 1px solid rgba(255, 255, 255, 0.10);
}
.dhu-foot-copy { font-size: 13.5px; line-height: 1.7; color: #9bbf7f; max-width: 78ch; }
.dhu-foot-meta { display: flex; align-items: center; gap: 9px; font-size: 13.3px; color: #9bbf7f; flex-wrap: wrap; }
.dhu-foot-sitemap { color: #c2ddaa; text-decoration: underline; text-underline-offset: 3px; }
.dhu-foot-sitemap:hover { color: var(--dhu-gold); }

.dhu-top-btn {
  position: fixed; right: 22px; bottom: 26px; z-index: 70;
  width: 46px; height: 46px; border: 0; border-radius: 50%;
  background: var(--dhu-menuy); color: #fff; font-size: 18px; cursor: pointer;
  box-shadow: 0 12px 26px rgb(28,48,11, 0.28);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity 0.26s ease, transform 0.26s ease, visibility 0.26s ease, background 0.2s ease;
}
.dhu-top-btn.is-show { opacity: 1; visibility: visible; transform: none; }
.dhu-top-btn:hover { background: var(--dhu-coral); }

/* ---------- breadĐường dẫn ---------- */
.dhu-crumb { background: var(--dhu-white); border-bottom: 1px solid var(--dhu-line); }
.dhu-crumb-line { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; padding: 15px 24px; font-size: 14px; }
.dhu-crumb-line a { color: var(--dhu-ink-3); transition: color 0.2s ease; }
.dhu-crumb-line a:hover { color: var(--dhu-coral); }
.dhu-crumb-sep { color: #d6edc3; }
.dhu-crumb-now { font-weight: 600; color: var(--dhu-menuy); }

/* ---------- Phần 01 ---------- */
.dhu-ibanner {
  position: relative; overflow: hidden;
  background: linear-gradient(112deg, var(--dhu-menuy-deep) 0%, var(--dhu-menuy) 58%, var(--dhu-menuy-mid) 100%);
  color: #fff; padding: 56px 0 60px;
}
.dhu-ibanner-inner { display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center; }
.dhu-ibanner-kicker {
  display: inline-block; margin-bottom: 12px; font-family: var(--dhu-display);
  font-size: 12.5px; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase; color: var(--dhu-gold);
}
.dhu-ibanner-head { font-family: var(--dhu-display); font-size: clamp(28px, 3.2vw, 42px); font-weight: 800; color: #fff; line-height: 1.15; }
.dhu-ibanner-desc { margin-top: 14px; max-width: 66ch; font-size: 16px; line-height: 1.75; color: rgb(235,250,220, 0.85); }
.dhu-ibanner-art { position: relative; width: 190px; height: 168px; flex: 0 0 auto; }
.dhu-ib-hex {
  position: absolute; right: 74px; top: 6px; width: 118px; height: 132px;
  background: rgb(77,90,255, 0.30); border: 2px solid rgb(77,90,255, 0.65);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}
.dhu-ib-hex-sm {
  right: 4px; top: 52px; width: 78px; height: 88px;
  background: rgb(158,81,245, 0.24); border-color: rgb(158,81,245, 0.7);
}
.dhu-ib-dot {
  position: absolute; left: 18px; bottom: 8px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--dhu-gold);
}

/* ---------- Danh sách / detail layout ---------- */
.dhu-page { padding-top: 40px; }
.dhu-page-h1 { font-size: clamp(26px, 2.8vw, 34px); font-weight: 800; }
.dhu-page-desc { margin-top: 12px; max-width: 76ch; font-size: 16.5px; line-height: 1.8; color: var(--dhu-ink-3); }
.dhu-page-head { margin-bottom: 32px; }
.dhu-page-acts { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.dhu-list-wrap, .dhu-article-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 40px; align-items: start; }
.dhu-list-main, .dhu-show-main { min-width: 0; }

/* ---------- Phân trang ---------- */
.dhu-pagi { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; margin-top: 38px; }
.dhu-pagi-btn {
  min-width: 42px; height: 42px; padding: 0 14px; border-radius: 11px;
  border: 1px solid var(--dhu-line); background: #fff; cursor: pointer;
  font-family: var(--dhu-display); font-size: 15px; font-weight: 700; color: var(--dhu-menuy);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.dhu-pagi-btn:hover:not(:disabled) { border-color: var(--dhu-coral); color: var(--dhu-coral); }
.dhu-pagi-btn.is-cur { background: var(--dhu-menuy); border-color: var(--dhu-menuy); color: #fff; }
.dhu-pagi-btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* ---------- Cột bên ---------- */
.dhu-side { display: flex; flex-direction: column; gap: 22px; position: sticky; top: 100px; }
.dhu-side-box {
  background: var(--dhu-white); border: 1px solid var(--dhu-line);
  border-radius: var(--dhu-radius); padding: 22px 22px 24px;
}
.dhu-side-h {
  margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--dhu-menuy-soft);
  font-family: var(--dhu-display); font-size: 17px; font-weight: 800; color: var(--dhu-menuy);
}
.dhu-side-hot li + li { margin-top: 14px; }
.dhu-side-hot a { display: grid; grid-template-columns: 96px 1fr; gap: 13px; align-items: center; }
.dhu-side-hot img { width: 96px; height: 72px; object-fit: cover; border-radius: 9px; background: var(--dhu-menuy-soft); }
.dhu-side-hot-body { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.dhu-side-hot-body strong {
  font-family: var(--dhu-display); font-size: 14.5px; font-weight: 700; line-height: 1.45; color: var(--dhu-menuy);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.dhu-side-hot a:hover strong { color: var(--dhu-coral); }
.dhu-side-hot-body time { font-size: 12.5px; color: var(--dhu-ink-3); }
.dhu-side-more {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 16px;
  font-family: var(--dhu-display); font-size: 14.5px; font-weight: 700; color: var(--dhu-coral);
}
.dhu-side-more:hover b { transform: translateX(3px); }
.dhu-side-more b { transition: transform 0.2s ease; }
.dhu-side-list li + li { margin-top: 10px; }
.dhu-side-list a {
  display: grid; grid-template-columns: 30px 1fr; gap: 12px; align-items: start;
  font-size: 14.5px; line-height: 1.6; color: var(--dhu-ink-2); transition: color 0.2s ease;
}
.dhu-side-list a:hover { color: var(--dhu-coral); }
.dhu-side-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 8px; background: var(--dhu-menuy-soft);
  font-family: var(--dhu-display); font-size: 14px; font-weight: 800; color: var(--dhu-menuy);
}
.dhu-side-cta { background: linear-gradient(150deg, var(--dhu-menuy) 0%, var(--dhu-menuy-deep) 100%); border-color: transparent; }
.dhu-side-cta .dhu-side-h { color: #fff; border-bottom-color: rgba(255, 255, 255, 0.16); }
.dhu-side-cta p { font-size: 14.5px; line-height: 1.75; color: rgb(235,250,220, 0.86); margin-bottom: 18px; }

/* ---------- Bài viết ---------- */
.dhu-article {
  background: var(--dhu-white); border: 1px solid var(--dhu-line);
  border-radius: var(--dhu-radius); padding: 38px 42px 34px;
}
.dhu-article-h1 { font-size: clamp(26px, 2.9vw, 38px); font-weight: 800; line-height: 1.24; }
.dhu-article-meta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin: 18px 0 26px; font-size: 14px; color: var(--dhu-ink-3); }
.dhu-meta-chip {
  padding: 5px 14px; border-radius: 999px; background: var(--dhu-coral-soft);
  font-family: var(--dhu-display); font-size: 13px; font-weight: 700; color: var(--dhu-coral-dark);
}
.dhu-meta-item b { color: var(--dhu-menuy); font-weight: 600; }
.dhu-article-figure { margin: 0 0 26px; border-radius: var(--dhu-radius-sm); overflow: hidden; }
.dhu-article-figure img { width: 100%; }
.dhu-article-body { font-size: 16.5px; line-height: 1.9; color: var(--dhu-ink-2); }
.dhu-article-body h2 {
  margin: 32px 0 14px; font-size: 22px; font-weight: 800; color: var(--dhu-menuy);
  padding-left: 14px; border-left: 4px solid var(--dhu-coral);
}
.dhu-article-body h3 { margin: 24px 0 10px; font-size: 19px; }
.dhu-article-body p + p { margin-top: 16px; }
.dhu-article-body ul { margin: 16px 0; display: flex; flex-direction: column; gap: 9px; }
.dhu-article-body li { position: relative; padding-left: 24px; }
.dhu-article-body li::before {
  content: ''; position: absolute; left: 6px; top: 12px; width: 7px; height: 7px;
  border-radius: 2px; background: var(--dhu-coral); transform: rotate(45deg);
}
.dhu-article-body img { border-radius: var(--dhu-radius-sm); margin: 18px 0; }
.dhu-article-tags { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 30px; padding-top: 22px; border-top: 1px solid var(--dhu-line); }
.dhu-tag-label { font-family: var(--dhu-display); font-size: 13px; font-weight: 700; letter-spacing: 0.8px; text-transform: uppercase; color: var(--dhu-ink-3); }
.dhu-tag {
  padding: 6px 15px; border-radius: 999px; background: var(--dhu-menuy-soft);
  font-size: 13.5px; font-weight: 600; color: var(--dhu-menuy); transition: background 0.2s ease, color 0.2s ease;
}
.dhu-tag:hover { background: var(--dhu-coral); color: #fff; }
.dhu-switcher { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 24px; }
.dhu-switcher-cell {
  padding: 20px 22px; background: var(--dhu-white); border: 1px solid var(--dhu-line); border-radius: var(--dhu-radius-sm);
}
.dhu-switcher-next { text-align: right; }
.dhu-switcher-label { display: block; margin-bottom: 8px; font-size: 12.5px; letter-spacing: 0.8px; text-transform: uppercase; color: var(--dhu-ink-3); }
.dhu-switcher-link {
  font-family: var(--dhu-display); font-size: 15.5px; font-weight: 700; line-height: 1.5; color: var(--dhu-menuy);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.dhu-switcher-link:hover { color: var(--dhu-coral); }
.dhu-switcher-empty { font-size: 14.5px; color: var(--dhu-ink-3); }
.dhu-related { margin-top: 38px; }
.dhu-block-h { margin-bottom: 20px; font-size: 22px; font-weight: 800; }
.dhu-other { margin-top: 46px; }
.dhu-other-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.dhu-other-grid a { display: block; border-radius: var(--dhu-radius-sm); overflow: hidden; border: 1px solid var(--dhu-line); background: #fff; }
.dhu-other-grid img { aspect-ratio: 16 / 11; object-fit: cover; width: 100%; }
.dhu-other-grid span {
  display: block; padding: 13px 15px; font-family: var(--dhu-display);
  font-size: 15px; font-weight: 700; color: var(--dhu-menuy);
}

/* ---------- Trang 404 ---------- */
.dhu-404 { padding: 80px 0 96px; background: linear-gradient(160deg, var(--dhu-menuy-deep) 0%, var(--dhu-menuy) 100%); color: #fff; }
.dhu-404-inner { text-align: center; }
.dhu-404-code {
  font-family: var(--dhu-display); font-size: clamp(90px, 14vw, 168px); font-weight: 800; line-height: 1;
  color: rgba(255, 255, 255, 0.14); letter-spacing: -4px;
}
.dhu-404-title { margin-top: -18px; font-size: clamp(26px, 3.2vw, 40px); font-weight: 800; color: #fff; }
.dhu-404-desc { max-width: 62ch; margin: 18px auto 0; font-size: 16.5px; line-height: 1.8; color: rgb(235,250,220, 0.86); }
.dhu-404-acts { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-top: 32px; }
.dhu-404-cats { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 44px; }
.dhu-404-cats a {
  display: inline-block; padding: 10px 20px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.28); font-size: 14.5px; font-weight: 600; color: #eefae2;
  transition: background 0.22s ease, border-color 0.22s ease, transform 0.22s ease;
}
.dhu-404-cats a:hover { background: rgb(77,90,255, 0.9); border-color: transparent; transform: translateY(-2px); }

/* ---------- Hiệu ứng xuất hiện ---------- */
.dhu-reveal { opacity: 1; transform: none; }
html.dhu-js .dhu-reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
html.dhu-js .dhu-reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html.dhu-js .dhu-reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Giao diện máy tính bảng ---------- */
@media (max-width: 1180px) {
  .dhu-menu {
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 58;
    width: min(84vw, 340px); background: var(--dhu-menuy-deep);
    padding: 26px 0 40px; overflow-y: auto;
    transform: translateX(-102%); transition: transform 0.32s ease;
    box-shadow: 18px 0 48px rgb(21,38,8, 0.35);
  }
  .dhu-menu.is-open { transform: translateX(0); }
  .dhu-menu-list { flex-direction: column; align-items: stretch; gap: 2px; padding: 0 18px; }
  .dhu-menu-list > li { border-bottom: 1px solid rgba(255, 255, 255, 0.09); }
  .dhu-menu-list > li:last-child { border-bottom: 0; }
  .dhu-menu-a { display: block; padding: 15px 12px; font-size: 16px; color: rgba(255, 255, 255, 0.92); }
  .dhu-menu-a::after { left: 12px; right: 12px; bottom: 8px; }
  .dhu-burger { display: block; }
  .dhu-mask { display: block; }
  .dhu-brand-img { width: 178px; height: 42px; }
  .dhu-hero { padding-top: 66px; }
  .dhu-grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dhu-topic-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .dhu-list-wrap, .dhu-article-wrap { grid-template-columns: 1fr; gap: 34px; }
  .dhu-side { position: static; }
  .dhu-lead-wrap { grid-template-columns: 1fr; }
  .dhu-about-wrap { grid-template-columns: 1fr; gap: 32px; }
  .dhu-faq-wrap { grid-template-columns: 1fr; gap: 28px; }
  .dhu-faq-intro { position: static; }
  .dhu-foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px; }
  .dhu-flink-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .dhu-other-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dhu-article { padding: 30px 28px 26px; }
}

/* ---------- Giao diện điện thoại ---------- */
@media (max-width: 700px) {
  .dhu-shell { padding: 0 18px; }
  .dhu-header-line { height: 66px; gap: 14px; }
  .dhu-brand-img { width: 152px; height: 36px; }
  .dhu-hero { padding-top: 50px; }
  .dhu-hero-inner { padding-bottom: 54px; }
  .dhu-hero-title { max-width: none; font-size: 30px; }
  .dhu-hero-desc { font-size: 15.5px; }
  .dhu-hero-stats { grid-template-columns: 1fr; transform: translateY(26px); }
  .dhu-hero-stats li { border-right: 0; border-bottom: 1px solid var(--dhu-line); padding: 18px 20px; }
  .dhu-hero-stats li:last-child { border-bottom: 0; }
  .dhu-hero-stats strong { font-size: 26px; }
  .dhu-section { padding: 52px 0; }
  .dhu-section:first-of-type { padding-top: 76px; }
  .dhu-head-row { flex-direction: column; align-items: flex-start; gap: 16px; }
  .dhu-grid-4 { grid-template-columns: 1fr; gap: 18px; }
  .dhu-topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 16px; }
  .dhu-topic-hex { max-width: 132px; }
  .dhu-topic-name { font-size: 16px; }
  .dhu-lead-list a { grid-template-columns: 76px 1fr; gap: 12px; }
  .dhu-lead-thumb { width: 76px; height: 60px; }
  .dhu-track { padding: 6px 18px 18px; scroll-padding-left: 18px; }
  .dhu-track-card { flex-basis: 78vw; }
  .dhu-about-facts li { grid-template-columns: 42px 1fr; padding: 12px 14px; }
  .dhu-fact-num { font-size: 18px; }
  .dhu-ibanner { padding: 40px 0 44px; }
  .dhu-ibanner-inner { grid-template-columns: 1fr; }
  .dhu-ibanner-art { display: none; }
  .dhu-crumb-line { padding: 12px 18px; font-size: 13px; }
  .dhu-article { padding: 24px 20px 22px; }
  .dhu-article-h1 { font-size: 25px; }
  .dhu-article-body { font-size: 16px; }
  .dhu-switcher { grid-template-columns: 1fr; }
  .dhu-switcher-next { text-align: left; }
  .dhu-flink-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .dhu-flink { padding: 40px 0 34px; }
  .dhu-flink-icon { width: 54px; height: 54px; }
  .dhu-foot-grid { grid-template-columns: 1fr; gap: 26px; padding-top: 38px; }
  .dhu-foot-cats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dhu-foot-base { flex-direction: column; align-items: flex-start; gap: 12px; }
  .dhu-other-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dhu-404 { padding: 56px 0 68px; }
  .dhu-top-btn { right: 14px; bottom: 16px; width: 42px; height: 42px; }
}

/* ---------- print ---------- */
@media print {
  .dhu-header, .dhu-burger, .dhu-mask, .dhu-top-btn, .dhu-pagi, .dhu-side, .dhu-flink, .dhu-404-acts { display: none !important; }
  body { background: #fff; }
  .dhu-hero, .dhu-footer, .dhu-ibanner { background: #fff !important; color: #000 !important; }
  .dhu-hero-title, .dhu-footer .dhu-foot-h, .dhu-ibanner-head { color: #000 !important; }
}

/* ---------- Lớp bổ trợ ---------- */
.dhu-flink-cell,
.dhu-body,
.dhu-nav-a,
.dhu-band,
.dhu-band-in,
.dhu-topic-cell,
.dhu-faq-list,
.dhu-ibanner-copy,
.dhu-ibanner-title,
.dhu-rows { }

/* ---------- Khối khác biệt hoá ---------- */
.dhu-band{background:rgb(81,145,59);color:dhu-related;border-top:1px solid rgba(0,0,0,.12);border-bottom:1px solid rgba(0,0,0,.12);padding:16px 0}
.dhu-band-in{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;gap:40px;justify-content:center;flex-wrap:wrap;font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase}
.dhu-band-in span{display:inline-flex;align-items:center;gap:10px}
.dhu-band-in span::before{content:"";width:8px;height:8px;border-radius:50%;background:rgb(71,209,97)}
.dhu-stat{background:dhu-related;padding:44px 0}
.dhu-stat-in{max-width:1200px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.dhu-stat-cell{background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:16px;padding:26px 18px;text-align:center}
.dhu-stat-cell b{display:block;font-family:var(--font-head,Literata,serif);font-size:34px;line-height:1.1;color:rgb(81,145,59)}
.dhu-stat-cell span{display:block;margin-top:8px;font-size:13px;color:rgb(36,51,31);opacity:.8}
.dhu-quote{background:rgb(36,51,31);color:dhu-related;padding:52px 0}
.dhu-quote-in{max-width:900px;margin:0 auto;padding:0 20px;text-align:center;font-family:var(--font-head,Literata,serif);font-size:26px;line-height:1.5}
@media(max-width:900px){.dhu-band-in{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;gap:28px}.dhu-stat-in{grid-template-columns:repeat(2,1fr)}.dhu-quote-in{font-size:20px}}
@media(min-width:1025px){.dhu-hero-in{grid-template-columns:1.16fr .84fr}}