/* Màu theo logo LDH Social: cam + xám, nền tối than chì */
:root {
  --navy: #1E1E24;
  --navy-2: #141418;
  --blue: #F7972E;
  --blue-dark: #C65F00;
  --orange: #F7972E;
  --orange-red: #FF7A00;
  --gold: #FFB45C;
  --gray: #A5A4A5;
  --text: #26262B;
  --muted: #66666E;
  --line: #ECE6DF;
  --bg: #FFFFFF;
  --bg-soft: #FFF7EE;
  --bg-warm: #FFF0E0;
  --radius: 16px;
  --shadow: 0 6px 24px rgba(30, 30, 36, .07);
  --shadow-lg: 0 16px 48px rgba(30, 30, 36, .14);
  --grad: linear-gradient(135deg, #141418 0%, #22222A 55%, #3A3029 100%);
  --grad-cta: linear-gradient(90deg, #F7972E 0%, #FF7A00 100%);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif; color: var(--text); background: var(--bg); line-height: 1.65; font-size: 16px; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue-dark); text-decoration: none; }
a:hover { color: var(--orange); }
svg { width: 1em; height: 1em; flex: none; }
h1, h2, h3 { color: var(--navy); line-height: 1.3; margin: 0 0 .5em; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2.2vw, 2.6rem); font-weight: 800; }
h2 { font-size: clamp(1.35rem, 1.1rem + 1vw, 1.75rem); font-weight: 800; }
h3 { font-size: 1.1rem; font-weight: 700; }
p { margin: 0 0 1em; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 820px; }
.center { text-align: center; }
.section { padding-top: 40px; padding-bottom: 48px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: #fff; padding: 8px 12px; border-radius: 8px; }
.eyebrow { display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--orange); margin-bottom: .6em; }

/* Nút */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .45em; padding: .62em 1.15em; border-radius: 999px; font-weight: 700; font-size: .95rem; border: 2px solid transparent; cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s, color .15s; white-space: nowrap; font-family: inherit; line-height: 1.3; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--grad-cta); color: #fff; box-shadow: 0 6px 18px rgba(247, 151, 46, .35); }
.btn-primary:hover { color: #fff; box-shadow: 0 10px 24px rgba(247, 151, 46, .45); }
.btn-ghost { background: #fff; color: var(--blue-dark); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue-dark); }
.btn-soft { background: var(--bg-soft); color: var(--blue-dark); }
.btn-soft:hover { background: var(--blue); color: #fff; }
.btn-outline-light { color: #fff; border-color: rgba(255, 255, 255, .55); background: rgba(255, 255, 255, .06); }
.btn-outline-light:hover { color: var(--navy); background: #fff; }
.btn-lg { padding: .85em 1.5em; font-size: 1.02rem; }
.btn-block { width: 100%; }
.icon-btn { display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; border: 1px solid var(--line); background: #fff; color: var(--navy); cursor: pointer; font-size: 1.25rem; }
.icon-btn:hover { color: var(--orange); border-color: var(--orange); }
.link-btn { background: none; border: 0; color: var(--blue-dark); text-decoration: underline; cursor: pointer; font: inherit; padding: 0; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--line); }
.topbar { background: var(--navy); color: #CFCFD6; font-size: .82rem; }
.topbar a { color: #fff; font-weight: 600; }
.topbar a:hover { color: var(--gold); }
.topbar-in { display: flex; justify-content: space-between; gap: 12px; padding-top: 6px; padding-bottom: 6px; }
.topbar-contact a { display: inline-flex; align-items: center; gap: .35em; }
.header-in { display: flex; align-items: center; gap: 20px; height: 72px; }
.brand { display: inline-flex; flex: none; }
.main-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.main-nav > a { padding: 8px 10px; border-radius: 10px; color: var(--navy); font-weight: 600; font-size: .93rem; white-space: nowrap; }
.main-nav > a:hover { background: var(--bg-soft); color: var(--blue-dark); }
.main-nav > a[aria-current] { color: var(--orange); }
.nav-auth { display: none; }
.header-actions { display: flex; align-items: center; gap: 8px; }
.menu-toggle { display: none; }

@media (max-width: 1220px) {
  .menu-toggle { display: inline-grid; }
  .header-actions { margin-left: auto; }
  .main-nav { position: fixed; inset: 0 0 0 auto; width: min(340px, 86vw); flex-direction: column; align-items: stretch; background: #fff; padding: 88px 20px 24px; box-shadow: var(--shadow-lg); transform: translateX(105%); visibility: hidden; transition: transform .25s, visibility .25s; margin: 0; overflow-y: auto; z-index: 60; }
  .main-nav.open { transform: none; visibility: visible; }
  .main-nav > a { padding: 12px 14px; font-size: 1.02rem; border-bottom: 1px solid var(--line); border-radius: 0; }
  .nav-auth { display: grid; gap: 10px; margin-top: 18px; }
  body.nav-open::after { content: ''; position: fixed; inset: 0; background: rgba(20, 20, 24, .5); z-index: 45; }
  .menu-toggle[aria-expanded="true"] { position: relative; z-index: 61; }
}
@media (max-width: 640px) {
  .hide-sm { display: none; }
  .logo { font-size: 22px; }
  .header-in { height: 64px; gap: 12px; }
  .topbar-in > span:first-child { display: none; }
  .topbar-in { justify-content: center; }
}

/* Hero */
.hero { background: var(--grad); color: #fff; position: relative; overflow: hidden; }
.hero::before { content: '2026'; position: absolute; right: -20px; top: -60px; font-size: 220px; font-weight: 800; color: rgba(255, 255, 255, .05); line-height: 1; pointer-events: none; }
.hero::after { content: ''; position: absolute; right: -160px; bottom: -200px; width: 520px; height: 520px; background: radial-gradient(circle, rgba(247, 151, 46, .45), transparent 65%); pointer-events: none; }
.hero-in { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; padding-top: 64px; padding-bottom: 72px; position: relative; z-index: 1; }
.hero h1 { color: #fff; }
.hero h1 em { font-style: normal; color: var(--gold); }
.hero p { color: #D4D4DA; font-size: 1.08rem; max-width: 600px; }
.hero .eyebrow { color: var(--gold); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 18px; }
.hero-actions.center { justify-content: center; }
.hero-points { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 20px; color: #E4E4E9; font-size: .95rem; }
.hero-points li { display: flex; align-items: center; gap: .4em; }
.hero-points svg { color: var(--gold); }
.hero-visual { position: relative; height: 340px; }
.orb { position: absolute; display: grid; place-items: center; width: 74px; height: 74px; border-radius: 22px; background: #fff; color: var(--c); font-size: 2.1rem; box-shadow: 0 14px 34px rgba(0, 0, 0, .25); animation: float 6s ease-in-out infinite; }
.orb-0 { left: 6%; top: 8%; }
.orb-1 { left: 44%; top: 0; animation-delay: -1s; }
.orb-2 { right: 4%; top: 18%; animation-delay: -2s; }
.orb-3 { left: 0; bottom: 14%; animation-delay: -3s; }
.orb-4 { left: 40%; bottom: 0; animation-delay: -4s; }
.orb-5 { right: 8%; bottom: 10%; animation-delay: -5s; color: #229ED9; }
.hero-card { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); display: grid; gap: 8px; padding: 18px 26px; background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .25); border-radius: 20px; backdrop-filter: blur(6px); }
.hero-card-num { font-size: 1.35rem; font-weight: 800; color: #fff; }
.hero-card-num:nth-child(2) { color: var(--gold); }
@keyframes float { 50% { transform: translateY(-10px); } }
@media (prefers-reduced-motion: reduce) { .orb { animation: none; } html { scroll-behavior: auto; } }
@media (max-width: 900px) {
  .hero-in { grid-template-columns: 1fr; padding-top: 44px; padding-bottom: 48px; }
  .hero-visual { display: none; }
}

/* Thẻ chung */
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.chip { display: inline-block; font-size: .75rem; font-weight: 700; padding: .25em .8em; border-radius: 999px; color: var(--c, var(--blue-dark)); background: color-mix(in srgb, var(--c, var(--blue)) 12%, white); }
.chip:hover { color: #fff; background: var(--c, var(--blue)); }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: .4em; color: var(--muted); font-size: .85rem; }

/* Chuyên mục */
.cat-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-bottom: 32px; }
.cat-tile { display: flex; align-items: center; gap: 12px; padding: 14px 16px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); color: var(--navy); transition: transform .15s, border-color .15s; }
.cat-tile:hover { transform: translateY(-2px); border-color: var(--c); color: var(--navy); }
.cat-tile strong { display: block; }
.cat-tile small { color: var(--muted); }
.cat-icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: color-mix(in srgb, var(--c) 12%, white); color: var(--c); font-size: 1.4rem; flex: none; }
.cat-icon.lg { width: 64px; height: 64px; font-size: 2rem; border-radius: 18px; background: #fff; }
@media (max-width: 900px) { .cat-row { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 420px) { .cat-row { grid-template-columns: 1fr; } }

/* Ảnh bìa tự tạo */
.cover { aspect-ratio: 1200 / 630; border-radius: 12px; overflow: hidden; }
.cover img { width: 100%; height: 100%; object-fit: cover; }
.cover-gen { position: relative; display: flex; flex-direction: column; justify-content: flex-end; gap: 8px; padding: 18px; color: #fff; background:
  radial-gradient(circle at 85% 110%, rgba(247, 151, 46, .55), transparent 45%),
  linear-gradient(135deg, var(--navy-2), color-mix(in srgb, var(--c) 55%, #2A2A31)); }
.cover-gen::before { content: ''; position: absolute; inset: 0; background-image: radial-gradient(rgba(255, 255, 255, .14) 1px, transparent 1px); background-size: 16px 16px; }
.cover-icon { position: absolute; right: 16px; top: 16px; display: grid; place-items: center; width: 52px; height: 52px; border-radius: 14px; background: #fff; color: var(--c); font-size: 1.7rem; }
.cover-kw { position: relative; font-weight: 800; font-size: 1.15rem; line-height: 1.3; text-transform: capitalize; max-width: 80%; text-shadow: 0 2px 8px rgba(0, 0, 0, .25); }
.cover-lg { border-radius: var(--radius); margin: 24px 0; }
.cover-lg .cover-kw { font-size: clamp(1.3rem, 1rem + 1.8vw, 2.2rem); }
.cover-lg .cover-icon { width: 72px; height: 72px; font-size: 2.4rem; right: 24px; top: 24px; }
.cover-lg.cover-gen { padding: 28px; }

/* Bài nổi bật */
.featured { display: grid; grid-template-columns: 1.2fr 1fr; gap: 28px; padding: 16px; align-items: center; margin-bottom: 40px; }
.featured .cover-lg { margin: 0; }
.featured-body { padding: 8px 12px 8px 0; }
.featured-body h2 a { color: var(--navy); }
.featured-body h2 a:hover { color: var(--orange); }
@media (max-width: 800px) { .featured { grid-template-columns: 1fr; } .featured-body { padding: 4px; } }

/* Lưới bài viết */
.section-head { margin: 8px 0 22px; }
.section-head.center { text-align: center; max-width: 720px; margin-left: auto; margin-right: auto; }
.section-head p { color: var(--muted); }
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.post-card { display: flex; flex-direction: column; overflow: hidden; transition: transform .15s, box-shadow .15s; }
.post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.post-card .cover { border-radius: 0; }
.post-card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.post-card h3 { margin: 0; font-size: 1.08rem; }
.post-card h3 a { color: var(--navy); }
.post-card h3 a:hover { color: var(--orange); }
.post-card p { color: var(--muted); font-size: .92rem; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.post-card .meta { margin-top: auto; padding-top: 6px; }
.post-card-media { display: block; }
@media (max-width: 960px) { .post-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .post-grid { grid-template-columns: 1fr; } }
.empty { color: var(--muted); }

.pagination { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 36px 0 8px; }
.pagination a, .pagination span { min-width: 42px; height: 42px; padding: 0 12px; display: grid; place-items: center; border-radius: 12px; border: 1px solid var(--line); font-weight: 600; }
.pagination span[aria-current] { background: var(--navy); color: #fff; border-color: var(--navy); }

/* Dải nền */
.band { background: var(--bg-soft); background-image: radial-gradient(rgba(247, 151, 46, .16) 1px, transparent 1px); background-size: 18px 18px; }

/* Dịch vụ */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 36px; }
.service-card { padding: 22px; display: flex; flex-direction: column; border-top: 4px solid var(--c); }
.service-head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.service-head h3 { margin: 0; }
.service-icon { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px; background: color-mix(in srgb, var(--c) 12%, white); color: var(--c); font-size: 1.5rem; }
.service-card ul, .side-list { list-style: none; padding: 0; margin: 0 0 16px; display: grid; gap: 6px; font-size: .94rem; }
.service-card li, .side-list li { display: flex; gap: .5em; align-items: flex-start; }
.service-card li svg, .side-list li svg { color: var(--orange); margin-top: .3em; }
.service-card .btn { margin-top: auto; align-self: flex-start; }
@media (max-width: 960px) { .service-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .service-grid { grid-template-columns: 1fr; } }

/* Lợi ích */
.benefit-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 36px; }
.benefit { padding: 20px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
.benefit-icon { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px; background: var(--bg-warm); color: var(--orange); font-size: 1.4rem; margin-bottom: 12px; }
.benefit h3 { margin-bottom: .3em; }
.benefit p { color: var(--muted); font-size: .92rem; margin: 0; }
@media (max-width: 960px) { .benefit-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .benefit-grid { grid-template-columns: 1fr; } }

/* Các bước */
.steps { list-style: none; padding: 0; margin: 0 0 40px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.steps li { padding: 22px; border-radius: var(--radius); background: var(--bg-soft); }
.step-n { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; border: 2px solid var(--blue); color: var(--blue-dark); font-weight: 800; margin-bottom: 10px; background: #fff; }
.steps p { color: var(--muted); font-size: .93rem; margin: 0; }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }

/* Hộp CTA */
.cta-box { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; padding: 24px 26px; margin: 32px 0; border-radius: var(--radius); background: var(--grad); color: #fff; position: relative; overflow: hidden; }
.cta-box::after { content: ''; position: absolute; right: -80px; bottom: -120px; width: 280px; height: 280px; background: radial-gradient(circle, rgba(247, 151, 46, .5), transparent 65%); }
.cta-text { flex: 1 1 320px; position: relative; z-index: 1; }
.cta-text strong, .prose .cta-text strong { color: #fff; font-size: 1.2rem; display: block; margin-bottom: 4px; }
.cta-text p { margin: 0; color: #D4D4DA; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 10px; position: relative; z-index: 1; }
.cta-actions .btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .5); }
.cta-actions .btn-ghost:hover { background: #fff; color: var(--navy); }
@media (max-width: 520px) { .cta-actions, .cta-actions .btn { width: 100%; } }

/* Trang con */
.page-hero { background: var(--bg-soft); background-image: radial-gradient(rgba(247, 151, 46, .18) 1px, transparent 1px); background-size: 18px 18px; padding: 28px 0 32px; border-bottom: 1px solid var(--line); }
.page-hero p { color: var(--muted); max-width: 760px; margin: 0; }
.page-hero-row { display: flex; align-items: center; gap: 18px; }
.page-hero .cat-icon.lg { box-shadow: var(--shadow); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 6px; font-size: .85rem; color: var(--muted); margin-bottom: 14px; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--orange); }
.breadcrumb span[aria-current] { min-width: 0; color: var(--text); display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }

/* Bài viết */
.post-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 40px; padding-top: 28px; padding-bottom: 40px; }
.post-header h1 { margin-top: 12px; }
.lead { font-size: 1.1rem; color: var(--muted); }
.toc { background: var(--bg-soft); border: 1px solid #F6DCC0; border-left: 4px solid var(--blue); border-radius: 12px; padding: 16px 20px; margin: 0 0 28px; }
.toc strong { color: var(--navy); }
.toc ul { margin: 8px 0 0; padding: 0; list-style: none; }
.toc li { margin: 6px 0; padding-left: 14px; position: relative; }
.toc li::before { content: ""; position: absolute; left: 0; top: .7em; width: 6px; height: 6px; border-radius: 50%; background: var(--orange); }
.toc a { color: var(--text); }
.toc a:hover, .toc a.active { color: var(--orange); }
.prose { font-size: 1.04rem; }
.prose h2 { margin-top: 1.8em; padding-left: 14px; border-left: 4px solid var(--orange); scroll-margin-top: 96px; }
.prose h3 { margin-top: 1.4em; scroll-margin-top: 96px; }
.prose ul, .prose ol { padding-left: 1.4em; margin: 0 0 1.1em; }
.prose li { margin: .35em 0; }
.prose a { text-decoration: underline; text-underline-offset: 2px; }
.prose strong { color: var(--navy); }
.prose blockquote { margin: 1.4em 0; padding: 14px 20px; background: var(--bg-warm); border-left: 4px solid var(--orange); border-radius: 0 12px 12px 0; }
.prose blockquote p:last-child { margin: 0; }
.prose img { border-radius: 12px; margin: 1.2em auto; }
.table-wrap { overflow-x: auto; margin: 1.2em 0; border: 1px solid var(--line); border-radius: 12px; }
.prose table { width: 100%; border-collapse: collapse; font-size: .95rem; min-width: 520px; }
.prose th { background: var(--blue-dark); color: #fff; text-align: left; }
.prose th, .prose td { padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose tr:nth-child(even) td { background: var(--bg-soft); }
.prose .service-grid { grid-template-columns: repeat(2, 1fr); }
.prose .service-card ul { padding: 0; }
.prose .btn { text-decoration: none; }
.faq { margin-top: 36px; }
.faq details { border: 1px solid var(--line); border-radius: 12px; margin-bottom: 10px; background: #fff; }
.faq summary { cursor: pointer; padding: 14px 18px; font-weight: 700; color: var(--navy); list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--orange); font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: '–'; }
.faq details > div { padding: 0 18px 16px; color: var(--text); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tags span { font-size: .85rem; padding: 4px 10px; border-radius: 999px; background: var(--bg-soft); color: var(--blue-dark); }
.sidebar { display: flex; flex-direction: column; gap: 20px; }
.side-box { padding: 20px; }
.side-box h3 { font-size: 1.02rem; }
.side-auth { text-align: center; border-top: 4px solid var(--orange); }
.side-auth img { margin: 0 auto 10px; }
.side-auth p { font-size: .93rem; color: var(--muted); }
.side-auth .btn + .btn { margin-top: 8px; }
.side-posts { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; font-size: .93rem; }
.side-posts li { padding-bottom: 10px; border-bottom: 1px dashed var(--line); }
.side-posts li:last-child { border: 0; padding: 0; }
.side-posts a { color: var(--text); font-weight: 600; }
.side-posts a:hover { color: var(--orange); }
.side-toc { position: sticky; top: 96px; }
.side-toc .toc { margin: 0; padding: 0; border: 0; background: none; }
@media (max-width: 1000px) {
  .post-layout { grid-template-columns: minmax(0, 1fr); }
  .side-toc { display: none; }
}

/* Đăng nhập / Đăng ký */
.auth-wrap { background: var(--bg-soft); background-image: radial-gradient(rgba(247, 151, 46, .18) 1px, transparent 1px); background-size: 18px 18px; }
.auth-in { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: start; padding-top: 36px; padding-bottom: 56px; }
.auth-info .benefit-grid { grid-template-columns: repeat(2, 1fr); margin-top: 24px; }
.auth-card { padding: 30px 26px; text-align: center; border-top: 5px solid var(--orange); position: sticky; top: 100px; }
.auth-card img { margin: 0 auto 16px; height: 54px; width: auto; }
.auth-card p { color: var(--muted); font-size: .95rem; }
.auth-card .btn { margin: 8px 0 14px; white-space: normal; }
.auth-switch { margin: 0 0 12px; }
.auth-note { display: flex; gap: .5em; align-items: flex-start; text-align: left; font-size: .85rem; background: var(--bg-warm); padding: 10px 12px; border-radius: 10px; margin: 0; }
.auth-note svg { color: var(--orange); margin-top: .2em; }
@media (max-width: 900px) {
  .auth-in { grid-template-columns: 1fr; }
  .auth-card { position: static; order: -1; }
}
@media (max-width: 520px) { .auth-info .benefit-grid { grid-template-columns: 1fr; } }

/* Liên hệ */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.contact-card { padding: 24px; text-align: center; color: var(--text); }
.contact-card p { color: var(--muted); margin: 0; font-size: .93rem; overflow-wrap: anywhere; }
.contact-icon { display: grid; place-items: center; width: 56px; height: 56px; margin: 0 auto 12px; border-radius: 16px; background: var(--bg-soft); color: var(--blue-dark); font-size: 1.6rem; }
.contact-icon.zalo { background: none; font-size: 3.4rem; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .contact-grid { grid-template-columns: 1fr; } }

/* Tìm kiếm */
.search-form { display: flex; gap: 10px; max-width: 640px; margin-top: 16px; }
.search-form input { flex: 1; min-width: 0; padding: .8em 1em; border-radius: 999px; border: 1px solid var(--line); font: inherit; font-size: 1rem; }
.search-form input:focus { outline: 2px solid var(--blue); border-color: transparent; }
.search-status { color: var(--muted); }
.notfound h1 { font-size: 6rem; color: var(--orange); margin: 0; }

/* Footer */
.site-footer { background: var(--navy); color: #B4B4BC; margin-top: 0; font-size: .93rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.4fr; gap: 32px; padding-top: 48px; padding-bottom: 36px; }
.site-footer h3 { color: #fff; font-size: 1rem; margin-bottom: 14px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.site-footer a { color: #E6E6EA; }
.site-footer a:hover { color: var(--gold); }
.footer-brand img { height: 52px; width: auto; margin-bottom: 14px; }
.footer-cta { display: flex; flex-wrap: wrap; gap: 10px; }
.footer-contact li { display: flex; gap: .6em; align-items: flex-start; }
.footer-contact svg { color: var(--orange); margin-top: .3em; }
.footer-links { margin-top: 16px !important; grid-template-columns: repeat(2, auto); justify-content: start; column-gap: 20px !important; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); padding: 16px 0 84px; font-size: .85rem; text-align: center; }
@media (max-width: 960px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }

/* Nút liên hệ nổi */
.float-contact { position: fixed; right: 16px; bottom: 16px; display: grid; gap: 10px; z-index: 40; }
.float-contact a { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%; box-shadow: 0 8px 22px rgba(0, 0, 0, .2); }
.float-zalo { background: #fff; font-size: 52px; }
.float-zalo svg { width: 52px; height: 52px; border-radius: 50%; }
.float-phone { background: var(--grad-cta); color: #fff; font-size: 1.4rem; animation: ring 2.4s ease-in-out infinite; }
.float-phone:hover { color: #fff; }
@keyframes ring { 0%, 100% { box-shadow: 0 0 0 0 rgba(247, 151, 46, .5); } 60% { box-shadow: 0 0 0 14px rgba(247, 151, 46, 0); } }
.prose .cta-box p { color: #D4D4DA; }

/* Logo LDH Social */
.logo { display: inline-flex; align-items: center; gap: .32em; font-size: 26px; line-height: 1; white-space: nowrap; }
.logo img { height: 1.55em; width: auto; }
.logo-text { font-family: Roboto, 'Be Vietnam Pro', Arial, sans-serif; font-weight: 700; color: #FF7A00; letter-spacing: -.01em; }
.logo-lg { font-size: 30px; }
.logo-xl { font-size: 40px; }
.side-auth .logo, .auth-card .logo { margin: 0 auto 14px; }
.site-footer .logo { margin-bottom: 16px; }
.hero-card img { width: 64px; height: auto; margin: 0 auto 4px; }
.cover-brand { position: absolute; left: 18px; top: 16px; font-family: Roboto, Arial, sans-serif; font-weight: 700; font-size: .8rem; color: var(--orange); background: rgba(0, 0, 0, .35); padding: 3px 9px; border-radius: 999px; }
.cover-lg .cover-brand { left: 28px; top: 26px; font-size: .95rem; }
.float-fb { background: #1877F2; color: #fff; font-size: 1.5rem; }
.float-fb:hover { color: #fff; }
.topbar-contact { display: inline-flex; gap: 16px; }

/* Cụm từ khoá trang chủ */
.kw-hub { margin-bottom: 40px; }
.kw-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.kw-tile { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: 12px; background: #fff; border: 1px solid var(--line); color: var(--navy); font-weight: 600; transition: border-color .15s, transform .15s; }
.kw-tile:hover { border-color: var(--orange); color: var(--blue-dark); transform: translateY(-2px); }
.kw-tile > svg:last-child { margin-left: auto; color: var(--orange); }
.kw-icon { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; background: color-mix(in srgb, var(--c) 12%, white); color: var(--c); font-size: 1.1rem; flex: none; }
@media (max-width: 960px) { .kw-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .kw-grid { grid-template-columns: 1fr; } }
.seo-text { margin: 8px auto 32px; }
.seo-text h2 { text-align: center; }
.seo-text a { text-decoration: underline; text-underline-offset: 2px; }
.faq { max-width: 820px; margin-left: auto; margin-right: auto; }
.post .faq { max-width: none; }

/* Bài viết: tóm tắt + tác giả */
.summary-box { background: var(--bg-warm); border: 1px solid #F6D2AC; border-radius: 12px; padding: 16px 20px; margin: 0 0 22px; }
.summary-box strong { display: flex; align-items: center; gap: .4em; color: var(--blue-dark); }
.summary-box ul { margin: 8px 0 0; padding-left: 1.2em; }
.summary-box li { margin: 4px 0; }
.author-box { display: flex; gap: 16px; align-items: flex-start; padding: 18px 20px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; margin: 0 0 24px; }
.author-box img { width: 64px; height: 64px; object-fit: contain; border-radius: 16px; background: var(--navy); padding: 8px; flex: none; }
.author-box strong { color: var(--navy); font-size: 1.05rem; }
.author-box p { margin: 4px 0 6px; color: var(--muted); font-size: .94rem; }
.author-box a { font-weight: 600; font-size: .92rem; }

/* Giới thiệu */
.about-head { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.about-head .logo { background: #fff; padding: 14px 20px; border-radius: 18px; box-shadow: var(--shadow); }
.value-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 0 0 1.2em; }
.value { padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.value h3 { margin: 0 0 .3em; }
.value p { margin: 0; color: var(--muted); font-size: .95rem; }
@media (max-width: 560px) { .value-grid { grid-template-columns: 1fr; } .logo-xl { font-size: 30px; } }
.section-tight { padding-bottom: 48px; }

/* Video YouTube */
.btn-yt { background: #FF0000; color: #fff; }
.btn-yt:hover { color: #fff; background: #D90000; }
.section-head-row { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; }
.head-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card { overflow: hidden; display: flex; flex-direction: column; }
.video-thumb { position: relative; display: block; aspect-ratio: 16 / 9; background: #000; border: 0; padding: 0; cursor: pointer; width: 100%; overflow: hidden; }
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .25s; }
.video-thumb:hover img { transform: scale(1.04); }
.video-thumb iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.play-btn { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); display: grid; place-items: center; width: 64px; height: 44px; border-radius: 12px; background: rgba(255, 0, 0, .92); color: #fff; font-size: 1.5rem; box-shadow: 0 6px 18px rgba(0, 0, 0, .3); }
.video-body { padding: 14px 16px 16px; }
.video-body h3 { font-size: 1rem; margin: 0 0 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-body h3 a { color: var(--navy); }
.video-body h3 a:hover { color: var(--orange); }
.video-body .meta svg { color: #FF0000; }
.side-videos { list-style: none; padding: 0; margin: 0 0 14px; display: grid; gap: 12px; }
.side-videos a { display: grid; grid-template-columns: 112px 1fr; gap: 10px; align-items: start; color: var(--text); font-size: .88rem; font-weight: 600; line-height: 1.4; }
.side-videos a:hover { color: var(--orange); }
.side-videos img { width: 112px; height: 63px; object-fit: cover; border-radius: 8px; }
@media (max-width: 960px) { .video-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .video-grid { grid-template-columns: 1fr; } }