/* ============================================================================
 * pages.css — Section patterns: hero, question, split philosophy, process,
 * calculator, case study, journey timeline, cooperation, page-hero
 * ==========================================================================*/

/* ---------- HERO (homepage) ---------------------------------------------- */
.hero { position: relative; min-height: 100vh; min-height: 100svh; display: flex; align-items: center; overflow: hidden; padding-top: 120px; padding-bottom: 80px; }
.hero__bg { position: absolute; inset: 0; z-index: 0; }
.hero__bg img, .hero__bg .ph { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero__bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(11,13,15,.94) 0%, rgba(11,13,15,.82) 42%, rgba(11,13,15,.5) 100%); }
.hero__bg .ph { background: radial-gradient(130% 120% at 75% 20%, #24282e 0%, #14171b 55%, #0b0d0f 100%); }
.hero__inner { position: relative; z-index: 2; max-width: 820px; }
.hero__title { margin: 1.4rem 0; }
.hero__title .line { display: block; }
.hero__title .accent { color: var(--gold); }
.hero__sub { max-width: 54ch; margin-bottom: 2.2rem; }
.hero__cta { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
.hero__scroll { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); z-index: 2; display: flex; flex-direction: column; align-items: center; gap: .6rem; font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); }
.hero__scroll .mouse { width: 22px; height: 36px; border: 1px solid var(--muted); border-radius: 12px; position: relative; }
.hero__scroll .mouse::after { content: ""; position: absolute; left: 50%; top: 7px; width: 3px; height: 7px; border-radius: 3px; background: var(--gold); transform: translateX(-50%); animation: scrolldot 1.8s var(--ease) infinite; }
@keyframes scrolldot { 0% { opacity: 0; transform: translate(-50%, 0); } 40% { opacity: 1; } 80% { opacity: 0; transform: translate(-50%, 12px); } 100% { opacity: 0; } }
@media (max-width: 1040px) { .hero__scroll { display: none; } }

/* ---------- HERO banner variant (portrait + minimal text) ---------------- */
.hero--banner .hero__bg::after { background: linear-gradient(90deg, rgba(11,13,15,.95) 0%, rgba(11,13,15,.88) 42%, rgba(11,13,15,.74) 100%); }
.hero__inner--banner { max-width: none; width: 100%; display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.hero--banner .hero__title { font-size: clamp(2.4rem, 1.2rem + 4.2vw, 5rem); margin: 1rem 0 1.15rem; }
.hero--banner .hero__sub { margin-bottom: 1.8rem; }
.hero__text { max-width: 36rem; }
.hero__portrait { justify-self: end; width: 100%; max-width: 440px; }
.hero__portrait-frame { position: relative; aspect-ratio: 4 / 5; border-radius: 20px; overflow: hidden; border: 1px solid rgba(184,155,97,.38); box-shadow: 0 34px 90px rgba(0,0,0,.6); background: #14171b; }
.hero__portrait-frame::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: linear-gradient(180deg, rgba(11,13,15,0) 55%, rgba(11,13,15,.5) 100%); pointer-events: none; }
.hero__portrait-frame img { width: 100%; height: 100%; object-fit: cover; object-position: center 18%; display: block; }
@media (max-width: 920px) {
  .hero__inner--banner { grid-template-columns: 1fr; gap: 2.2rem; }
  .hero__text { max-width: none; order: 2; }
  .hero__portrait { order: 1; justify-self: center; max-width: 290px; }
}

/* ---------- Stats band ---------------------------------------------------- */
.stats-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stats-band .stat { padding: clamp(1.4rem,1rem+1.5vw,2.4rem) clamp(1rem,.5rem+1vw,2rem); border-left: 1px solid var(--border); }
.stats-band .stat:first-child { border-left: 0; padding-left: 0; }
@media (max-width: 760px) { .stats-band { grid-template-columns: 1fr 1fr; } .stats-band .stat { border-left: 0; border-top: 1px solid var(--border); padding-left: 0; } .stats-band .stat:first-child, .stats-band .stat:nth-child(2) { border-top: 0; } }

/* ---------- Big question (signature) ------------------------------------- */
.question { text-align: center; }
.question__text { font-family: var(--font-display); font-weight: 800; font-size: clamp(2.2rem, 1.2rem + 5.4vw, 6rem); line-height: 1.08; letter-spacing: -0.02em; padding-bottom: .06em; }
.question__text .fade { color: color-mix(in srgb, var(--warm-white) 30%, transparent); transition: color 1s var(--ease); }
.question.in .question__text .fade { color: var(--gold); }
.question__reveal { max-width: 640px; margin: 2.4rem auto 0; }

/* ---------- Split philosophy (two legs) ---------------------------------- */
.legs { display: grid; grid-template-columns: 1fr auto 1fr; align-items: stretch; gap: 0; border: 1px solid var(--border); border-radius: var(--radius-xl); overflow: hidden; }
.legs__side { padding: clamp(2rem,1.5rem+2vw,3.6rem); }
.legs__side h3 { margin-bottom: .6rem; }
.legs__side .leg-en { font-size: .8rem; letter-spacing: .18em; text-transform: uppercase; color: var(--gold); margin-bottom: 1.4rem; }
.legs__mid { display: grid; place-items: center; background: var(--gold-soft); padding: 1.5rem; border-inline: 1px solid var(--border); }
.legs__mid span { writing-mode: vertical-rl; transform: rotate(180deg); font-family: var(--font-display); font-weight: 700; letter-spacing: .04em; color: var(--gold); font-size: 1rem; }
@media (max-width: 760px) {
  .legs { grid-template-columns: 1fr; }
  .legs__mid { border-inline: 0; border-block: 1px solid var(--border); }
  .legs__mid span { writing-mode: horizontal-tb; transform: none; }
}

/* ---------- Documentary (từ thực chiến đến kiến thức) --------------------- */
.doc-block { display: grid; grid-template-columns: minmax(280px, 430px) 1fr; gap: clamp(2rem, 1.2rem + 3.4vw, 4.5rem); align-items: start; }
.doc-block > div:first-child { position: sticky; top: 100px; }
.doc-block .prose { max-width: 60ch; }
.doc-block.reverse { direction: rtl; } .doc-block.reverse > * { direction: ltr; }
@media (max-width: 860px) {
  .doc-block, .doc-block.reverse { grid-template-columns: 1fr; direction: ltr; gap: 1.8rem; }
  .doc-block > div:first-child { position: static; max-width: 420px; margin-inline: auto; }
}

/* ---------- Process horizontal timeline ---------------------------------- */
.process { position: relative; }
.process__track { display: flex; gap: 1rem; overflow-x: auto; padding-bottom: 1.5rem; scroll-snap-type: x mandatory; scrollbar-width: thin; }
.process__step { scroll-snap-align: start; flex: 0 0 clamp(220px, 70%, 300px); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.6rem; background: var(--bg-elev); transition: border-color .3s var(--ease), transform .3s var(--ease); }
.process__step:hover { border-color: color-mix(in srgb,var(--gold) 50%, transparent); transform: translateY(-3px); }
.process__num { font-family: var(--font-display); font-size: 2.4rem; color: var(--gold); line-height: 1; }
.process__step h4 { margin: .6rem 0 .5rem; }
.process__step p { font-size: .9rem; color: var(--fg-dim); }
.process__hint { font-size: .8rem; color: var(--fg-dim); margin-top: 1rem; display: flex; align-items: center; gap: .5rem; }

/* ---------- Case study / investment memo --------------------------------- */
.memo { border: 1px solid var(--border); border-radius: var(--radius-xl); overflow: hidden; }
.memo__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.4rem clamp(1.4rem,1rem+1vw,2.2rem); border-bottom: 1px solid var(--border); background: var(--bg-elev); flex-wrap: wrap; }
.memo__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
@media (max-width: 760px) { .memo__grid { grid-template-columns: 1fr 1fr; } }
.memo__cell { padding: 1.4rem clamp(1.4rem,1rem+1vw,2.2rem); border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.memo__cell .k { font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--fg-dim); }
.memo__cell .v { font-family: var(--font-display); font-size: 1.5rem; margin-top: .4rem; }
.memo__note { padding: 1.4rem clamp(1.4rem,1rem+1vw,2.2rem); font-size: .9rem; color: var(--fg-dim); }

/* ---------- Calculator ---------------------------------------------------- */
.calc { display: grid; grid-template-columns: 1.05fr 1fr; gap: var(--gutter); align-items: start; }
@media (max-width: 960px) { .calc { grid-template-columns: 1fr; } }
.calc__inputs { border: 1px solid var(--border); border-radius: var(--radius-xl); padding: clamp(1.3rem,1rem+1.5vw,2rem); background: var(--bg-elev); }
.calc__group + .calc__group { margin-top: 1.6rem; padding-top: 1.6rem; border-top: 1px solid var(--border); }
.calc__group h4 { font-family: var(--font-body); font-size: .78rem; letter-spacing: .16em; text-transform: uppercase; color: var(--gold); margin-bottom: 1rem; }
.calc__row { display: grid; grid-template-columns: 1fr auto; gap: .6rem 1rem; align-items: center; margin-bottom: .9rem; }
.calc__row label { font-size: .9rem; display: inline-flex; align-items: center; gap: .4rem; }
.calc__row .tip { width: 16px; height: 16px; border-radius: 50%; border: 1px solid var(--fg-dim); color: var(--fg-dim); font-size: .7rem; display: inline-grid; place-items: center; cursor: help; position: relative; flex: none; }
.calc__row .tip:hover::after { content: attr(data-tip); position: absolute; bottom: 140%; left: 50%; transform: translateX(-50%); width: max-content; max-width: 240px; background: var(--ink); color: var(--warm-white); border: 1px solid var(--line); padding: .6rem .8rem; border-radius: 6px; font-size: .78rem; line-height: 1.4; z-index: 5; box-shadow: var(--shadow); white-space: normal; }
.calc__input { position: relative; }
.calc__input input { width: 100%; padding: .7rem .9rem; text-align: right; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); color: var(--fg); font-variant-numeric: tabular-nums; }
.calc__input input:focus { outline: none; border-color: var(--gold); }
.calc__input .unit { position: absolute; left: .8rem; top: 50%; transform: translateY(-50%); font-size: .78rem; color: var(--fg-dim); }

.calc__results { position: sticky; top: 96px; }
.calc__headline { border: 1px solid var(--border); border-radius: var(--radius-xl); padding: clamp(1.3rem,1rem+1.5vw,2rem); background: linear-gradient(180deg, var(--bg-elev), var(--bg)); }
.calc__metric-big { margin-bottom: 1.4rem; }
.calc__metric-big .lbl { font-size: .8rem; color: var(--fg-dim); letter-spacing: .08em; text-transform: uppercase; }
.calc__metric-big .val { font-family: var(--font-display); font-size: clamp(2rem,1.4rem+2.5vw,3rem); line-height: 1.05; margin-top: .3rem; }
.calc__metric-big .val.neg { color: #e08066; }
.calc__metric-big .val.pos { color: #8fcaa0; }
.calc__metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; margin-top: 1rem; }
.calc__metrics .m { background: var(--bg-elev); padding: 1rem 1.1rem; }
.calc__metrics .m .k { font-size: .76rem; color: var(--fg-dim); }
.calc__metrics .m .v { font-family: var(--font-display); font-size: 1.3rem; margin-top: .25rem; font-variant-numeric: tabular-nums; }
.calc__bars { margin-top: 1.4rem; }
.calc__bar { margin-bottom: .9rem; }
.calc__bar .bar-top { display: flex; justify-content: space-between; font-size: .84rem; margin-bottom: .35rem; }
.calc__bar .bar-track { height: 10px; background: var(--bg); border-radius: 999px; overflow: hidden; border: 1px solid var(--border); }
.calc__bar .bar-fill { height: 100%; border-radius: 999px; transition: width .6s var(--ease); }
.calc__disclaimer { font-size: .8rem; color: var(--fg-dim); margin-top: 1.2rem; }

/* ---------- Journey vertical timeline ------------------------------------ */
.journey { position: relative; max-width: 760px; margin-inline: auto; }
.journey::before { content: ""; position: absolute; left: 11px; top: 8px; bottom: 8px; width: 1px; background: var(--border); }
.journey__item { position: relative; padding-left: 3.2rem; padding-bottom: 2.6rem; }
.journey__item::before { content: ""; position: absolute; left: 4px; top: 6px; width: 15px; height: 15px; border-radius: 50%; border: 1px solid var(--gold); background: var(--bg); }
.journey__item.mark::before { background: var(--gold); box-shadow: 0 0 0 5px var(--gold-soft); }
.journey__item h4 { margin-bottom: .4rem; }
.journey__item p { color: var(--fg-dim); font-size: .95rem; }

/* ---------- Cooperation cards -------------------------------------------- */
.coop-card { padding: clamp(1.6rem,1.2rem+1.5vw,2.4rem); border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--bg-elev); transition: border-color .4s var(--ease), transform .4s var(--ease); display: flex; flex-direction: column; gap: .7rem; min-height: 220px; }
.coop-card:hover { border-color: color-mix(in srgb,var(--gold) 50%, transparent); transform: translateY(-4px); }
.coop-card .coop-ix { font-family: var(--font-display); color: var(--gold); font-size: 1rem; }
.coop-card h3 { font-size: var(--fs-h4); }
.coop-card p { color: var(--fg-dim); font-size: .95rem; flex: 1; }

/* ---------- Page hero (inner pages) -------------------------------------- */
.page-hero { position: relative; padding-top: clamp(140px, 10vw, 200px); padding-bottom: clamp(3rem,2rem+4vw,6rem); overflow: hidden; }
.page-hero .eyebrow { margin-bottom: 1.4rem; }
.page-hero h1 { max-width: 16ch; }
.page-hero .lead { margin-top: 1.4rem; max-width: 60ch; }
.page-hero__bg { position: absolute; inset: 0; z-index: -1; opacity: .5; }
.page-hero__bg::after { content:""; position:absolute; inset:0; background: linear-gradient(180deg, var(--ink) 0%, rgba(11,13,15,.6) 50%, var(--ink) 100%); }
.page-hero__bg img, .page-hero__bg .ph { width: 100%; height: 100%; object-fit: cover; }

.breadcrumb { display: flex; gap: .5rem; align-items: center; font-size: .82rem; color: var(--fg-dim); margin-bottom: 2rem; flex-wrap: wrap; }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb .sep { opacity: .5; }

/* ---------- Content prose (about / article) ------------------------------ */
.prose { max-width: 68ch; }
.prose p { margin-bottom: 1.3rem; color: var(--fg-dim); }
.surface-light .prose p { color: #3f4349; }
.prose h3 { margin: 2.6rem 0 1rem; }
.prose .pullquote { margin: 2.4rem 0; padding-left: 1.6rem; border-left: 2px solid var(--gold); color: var(--fg); }
.prose strong { color: var(--fg); font-weight: 600; }

/* ---------- Gallery ------------------------------------------------------- */
.gallery { columns: 3; column-gap: var(--gutter); }
@media (max-width: 860px) { .gallery { columns: 2; } }
@media (max-width: 520px) { .gallery { columns: 1; } }
.gallery .pimg { margin-bottom: var(--gutter); break-inside: avoid; }

/* ---------- FAQ ----------------------------------------------------------- */
.faq__item { border-bottom: 1px solid var(--border); }
.faq__q { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 1rem; text-align: left; padding: 1.3rem 0; font-family: var(--font-display); font-size: var(--fs-h4); }
.faq__q .ic { flex: none; width: 24px; height: 24px; position: relative; }
.faq__q .ic::before, .faq__q .ic::after { content: ""; position: absolute; inset: 50% 0 auto 0; height: 1.5px; background: var(--gold); transition: transform .3s var(--ease); }
.faq__q .ic::after { transform: rotate(90deg); }
.faq__item[open] .faq__q .ic::after { transform: rotate(0); }
.faq__a { padding-bottom: 1.4rem; color: var(--fg-dim); max-width: 70ch; }
details.faq__item summary { list-style: none; cursor: pointer; } details.faq__item summary::-webkit-details-marker { display: none; }

/* ---------- CTA band ------------------------------------------------------ */
.cta-band { text-align: center; }
.cta-band h2 { max-width: 20ch; margin-inline: auto; }
.cta-band .hero__cta { justify-content: center; margin-top: 2rem; }

/* ============================================================================
 * PREMIUM POLISH · typography + ánh kim + glow dịu (tiết chế, cao cấp)
 * ==========================================================================*/

/* --- Typography refinement: cân dòng heading, giãn dòng chữ đọc --- */
h1, h2, h3, .display, .hero__title, .pullquote, .section-head h2 { text-wrap: balance; }
p, .lead, .prose p { text-wrap: pretty; }
.prose p { line-height: 1.75; }

/* --- Chữ vàng nhấn: champagne ánh kim --- */
.accent, .hero__title .accent, .title .gold { color: var(--gold); }

@media (prefers-reduced-motion: no-preference) {
  .accent, .hero__title .accent {
    background: linear-gradient(100deg, var(--gold) 16%, #f3e7c6 50%, var(--gold) 84%);
    background-size: 220% 100%;
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: goldShimmer 7s ease-in-out infinite;
  }
  @keyframes goldShimmer { 0%, 100% { background-position: 0% 0; } 50% { background-position: 100% 0; } }

  /* Reveal: mờ nhẹ → nét, mượt hơn */
  [data-reveal] { filter: blur(5px); transition: opacity .9s var(--ease), transform .9s var(--ease), filter .9s var(--ease); }
  [data-reveal].in { filter: blur(0); }
}

/* --- Glow vàng dịu khi hover --- */
.card { transition: transform .5s var(--ease), border-color .5s var(--ease), box-shadow .5s var(--ease); }
.card:hover { box-shadow: 0 24px 60px rgba(0,0,0,.5), 0 0 0 1px rgba(184,155,97,.20), 0 12px 46px rgba(184,155,97,.10); }
.btn:hover { box-shadow: 0 12px 32px rgba(184,155,97,.20); }

/* Quầng sáng vàng nhẹ sau khung chân dung hero */
.hero--banner .hero__portrait-frame { box-shadow: 0 34px 90px rgba(0,0,0,.6), 0 0 90px rgba(184,155,97,.12); }

/* Câu trích: dấu nháy vàng tinh tế */
.prose .pullquote { position: relative; }

/* ============================================================================
 * ARTICLE (trang bài viết Kiến thức) — dùng chung cho mọi bài
 * ==========================================================================*/
.article { max-width: 760px; margin-inline: auto; }
.article__meta { display: flex; flex-wrap: wrap; gap: .6rem 1.4rem; align-items: center; font-size: .9rem; color: var(--fg-dim); margin-bottom: 2rem; padding-bottom: 1.4rem; border-bottom: 1px solid var(--border); }
.article__meta .who { display: flex; align-items: center; gap: .6rem; }
.article__meta .who img { width: 34px; height: 34px; border-radius: 999px; object-fit: cover; object-position: center 20%; border: 1px solid rgba(184,155,97,.4); }
.article__meta .who b { color: var(--fg); font-weight: 600; }
.article__meta .dot { color: var(--gold); }
.article .prose h2 { font-family: var(--font-display); font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2rem); margin: 2.8rem 0 1rem; scroll-margin-top: 90px; }
.article .prose h3 { font-size: 1.2rem; margin: 1.8rem 0 .7rem; }
.article .prose ul, .article .prose ol { margin: 0 0 1.3rem 1.2rem; }
.article .prose li { margin-bottom: .5rem; color: var(--fg-dim); }
.article figure { margin: 2.4rem 0; }
.article figcaption { font-size: .85rem; color: var(--fg-dim); margin-top: .7rem; text-align: center; }
.toc { background: var(--bg-elev); border: 1px solid var(--border); border-left: 2px solid var(--gold); border-radius: var(--radius-lg); padding: 1.3rem 1.5rem; margin: 2rem 0 2.6rem; }
.toc__title { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .18em; text-transform: uppercase; color: var(--gold); margin-bottom: .8rem; }
.toc ol { margin: 0; padding-left: 1.2rem; }
.toc li { margin-bottom: .45rem; }
.toc a { color: var(--fg-dim); text-decoration: none; transition: color .3s var(--ease); }
.toc a:hover { color: var(--gold); }
.callout { background: var(--gold-soft); border: 1px solid color-mix(in srgb, var(--gold) 35%, transparent); border-radius: var(--radius-lg); padding: 1.3rem 1.5rem; margin: 2rem 0; }
.callout b { color: var(--fg); }
.faq details { border: 1px solid var(--border); border-radius: var(--radius-lg); padding: .3rem 1.3rem; margin-bottom: .8rem; background: var(--bg-elev); }
.faq summary { cursor: pointer; font-weight: 600; padding: 1rem 0; list-style: none; display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--gold); font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details[open] summary { border-bottom: 1px solid var(--border); }
.faq details p { color: var(--fg-dim); padding: 1rem 0 .4rem; margin: 0; }
.author-box { display: flex; gap: 1.4rem; align-items: flex-start; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: clamp(1.4rem, 1rem + 1.5vw, 2rem); margin: 3rem 0; }
.author-box__img { flex: 0 0 auto; width: 92px; }
.author-box__img .pimg { border-radius: 14px; border: 1px solid rgba(184,155,97,.4); }
.author-box h3 { margin: 0 0 .3rem; font-size: 1.15rem; }
.author-box .role { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; color: var(--gold); margin-bottom: .7rem; }
.author-box p { color: var(--fg-dim); font-size: .94rem; margin-bottom: 1rem; }
.author-box .acts { display: flex; flex-wrap: wrap; gap: .6rem; }
@media (max-width: 560px) { .author-box { flex-direction: column; } .author-box__img { width: 120px; } }
.related { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gutter); margin-top: 1.8rem; }
@media (max-width: 820px) { .related { grid-template-columns: 1fr; } }

/* ============================================================================
 * 3D DEPTH — tilt thẻ theo chuột + vệt sáng + chân dung hero 3D (desktop)
 * ==========================================================================*/
@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .card, .topic-card { transform-style: preserve-3d; will-change: transform; }
  .card.tilt-active, .topic-card.tilt-active { transition: transform .1s linear, box-shadow .5s var(--ease), border-color .5s var(--ease); }
  .card::before {
    content: ""; position: absolute; inset: 0; border-radius: inherit; z-index: 4; pointer-events: none;
    background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 0%), rgba(255,255,255,.10), transparent 42%);
    opacity: 0; transition: opacity .4s var(--ease);
  }
  .card:hover::before { opacity: 1; }
  .hero__portrait-frame { will-change: transform; }
}

/* ============================================================================
 * 3D MẠNH HƠN — parallax cuộn + float chân dung + layer hero + glare
 * ==========================================================================*/
@media (prefers-reduced-motion: no-preference) {
  .hero__bg img, .page-hero__bg img { will-change: transform; }
  .hero--banner .hero__portrait-frame { animation: vvtFloat 6.5s ease-in-out infinite; }
  @keyframes vvtFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
  .hero__text { transition: transform .3s var(--ease); will-change: transform; }
  .card::before { background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 0%), rgba(255,255,255,.14), transparent 44%); }
}