/* ==========================================================================
   360VR · Component bài viết biên soạn lại (vr-x-*)
   Hợp đồng HTML: converter Markdown → Gutenberg (directive :::tldr, :::steps…).
   Scope .vr-b-body (template #158). Chỉ token semantic (docs/color.md). px vì html = 62.5%.
   Ngôn ngữ thiết kế khớp kb.css: kicker JetBrains Mono viết hoa, kẻ trên màu --text,
   bo 14–20px, số mảnh weight 200, band gradient surface-brand → surface-brand-deep.
   Nạp bằng mu-plugin vr-articles.php. Nguồn: design-src/post-articles.css
   ========================================================================== */

.vr-b-body .vr-x, .vr-b-body .vr-x-wrap {
  --x-ease: cubic-bezier(.2, .7, .1, 1);
  --x-radius: 18px;
  --x-gap: clamp(14px, 2vw, 20px);
  --x-shadow: 0 22px 44px -30px color-mix(in srgb, var(--surface-brand-deep) 55%, transparent);
  --x-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  /* F14: chênh lệch cỡ chữ đọc do nút A+/A− của kb.js (--fs mặc định 18px, mobile 17px) → cộng vào cỡ chữ đọc của component */
  --x-d: calc(var(--fs, 18px) - 18px);
  box-sizing: border-box;
  max-width: 100%;
  margin-left: 0; margin-right: 0;
}
.vr-b-body .vr-x *, .vr-b-body .vr-x *::before, .vr-b-body .vr-x *::after { box-sizing: border-box; }
/* Nhịp: khối component thở rộng hơn đoạn văn thường */
.vr-b-body > :is(.vr-x, .vr-x-wrap) { margin-top: clamp(32px, 4.5vw, 52px); }
.vr-b-body > :is(.vr-x, .vr-x-wrap) + * { margin-top: clamp(32px, 4.5vw, 52px); }
.vr-b-body > :is(.vr-x--lead, .vr-x--tldr):first-child { margin-top: 0; }

/* Reset typographic bên trong component (kb.css đặt margin cho h3/p/ul) */
.vr-b-body .vr-x :is(h2, h3, h4, p, ul, ol, figure) { margin: 0; }
.vr-b-body .vr-x :is(h3, h4) { scroll-margin-top: 100px; }
.vr-b-body .vr-x__body > * + * { margin-top: .75em; }
.vr-b-body .vr-x__body > :is(ul, ol):not([class]) { margin-top: .6em; }

/* Kicker chung */
.vr-b-body .vr-x__kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font: 500 11.5px/1.3 var(--x-mono); letter-spacing: .09em; text-transform: uppercase;
  color: var(--on-primary-soft);
}

@media (max-width: 767px) { .vr-b-body .vr-x, .vr-b-body .vr-x-wrap { --x-d: calc(var(--fs, 17px) - 17px); } }

/* Ẩn trực quan, giữ cho trình đọc màn hình (caption bảng, giá trị cuối của stats) */
.vr-x-sr { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* Focus chung — F10: chỉ outline, giữ bo góc riêng của component (nút pill, thẻ link) */
.vr-b-body .vr-x a:focus-visible, .vr-b-body .vr-x summary:focus-visible, .vr-b-body .vr-x [tabindex]:focus-visible {
  outline: 2px solid var(--focus-ring); outline-offset: 3px;
}
.vr-b-body .vr-x :is(a:not([class]), summary):focus-visible { border-radius: 6px; }

/* F9: gạch chân link trong thân bài đủ thấy (≥3:1 so với nền) — chỉ link chữ thường (không class) */
.vr-b-body a:not([class]) { text-decoration-color: color-mix(in srgb, var(--link) 70%, transparent); text-decoration-thickness: 1.5px; }
.vr-b-body a:not([class]):hover { text-decoration-color: currentColor; }
.vr-b-body .vr-x--cta .vr-x__body a:not([class]) { text-decoration-color: currentColor; }

/* ==========================================================================
   1. LEAD — đoạn mở bài
   ========================================================================== */
.vr-b-body .vr-x--lead { position: relative; padding-left: clamp(18px, 2.4vw, 26px); }
.vr-b-body .vr-x--lead::before {
  content: ""; position: absolute; left: 0; top: .35em; bottom: .35em; width: 3px; border-radius: 3px;
  background: linear-gradient(var(--primary), var(--accent));
}
.vr-b-body .vr-x--lead p {
  font-size: clamp(19px, 1.9vw, 22px); line-height: 1.62; font-weight: 450; letter-spacing: -.008em; color: var(--text); text-wrap: pretty;
}
.vr-b-body .vr-x--lead p + p { margin-top: .7em; }
.vr-b-body .vr-x--lead strong { font-weight: 700; color: var(--text-brand); }

/* ==========================================================================
   2. TLDR — tóm tắt nhanh đầu bài
   ========================================================================== */
.vr-b-body .vr-x--tldr {
  position: relative; overflow: hidden;
  padding: clamp(22px, 3vw, 32px) clamp(20px, 3vw, 34px) clamp(22px, 3vw, 30px);
  border: 1px solid var(--primary-border); border-radius: var(--x-radius);
  background:
    radial-gradient(120% 90% at 100% 0%, color-mix(in srgb, var(--accent) 16%, transparent) 0%, transparent 55%),
    var(--primary-soft);
}
.vr-b-body .vr-x--tldr::before { /* vạch nhấn đỉnh */
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent) 70%, var(--secondary-on-dark));
}
.vr-b-body .vr-x--tldr .vr-x__kicker { margin-bottom: 14px; }
.vr-b-body .vr-x--tldr .vr-x__kicker::before {
  content: ""; width: 22px; height: 22px; flex-shrink: 0; border-radius: 50%;
  background:
    linear-gradient(var(--on-primary), var(--on-primary)) center 7px / 10px 1.5px no-repeat,
    linear-gradient(var(--on-primary), var(--on-primary)) center 10.5px / 10px 1.5px no-repeat,
    linear-gradient(var(--on-primary), var(--on-primary)) center 14px / 6px 1.5px no-repeat,
    var(--primary);
}
.vr-b-body .vr-x--tldr .vr-x__list { display: grid; gap: 12px; padding: 0; list-style: none; counter-reset: tl; }
.vr-b-body .vr-x--tldr .vr-x__list > li {
  position: relative; padding-left: 38px; counter-increment: tl;
  font-size: calc(16.5px + var(--x-d)); line-height: 1.65; color: var(--text); text-wrap: pretty;
}
.vr-b-body .vr-x--tldr .vr-x__list > li::before {
  content: counter(tl, decimal-leading-zero); content: counter(tl, decimal-leading-zero) / ""; position: absolute; left: 0; top: .2em;
  width: 26px; height: 22px; display: flex; align-items: center; justify-content: center;
  border-radius: 6px; background: var(--surface); border: 1px solid var(--primary-border);
  font: 500 11px/1 var(--x-mono); color: var(--primary);
}
.vr-b-body .vr-x--tldr .vr-x__list > li + li { margin-top: 0; }
.vr-b-body .vr-x--tldr .vr-x__body { font-size: calc(16.5px + var(--x-d)); line-height: 1.7; color: var(--text); }
.vr-b-body .vr-x--tldr strong { color: var(--text-brand); }

/* ==========================================================================
   3. EXPERT — góc nhìn chuyên gia
   ========================================================================== */
.vr-b-body .vr-x--expert {
  position: relative;
  padding: clamp(22px, 3vw, 30px) clamp(20px, 3vw, 32px) clamp(22px, 3vw, 28px) clamp(64px, 7vw, 84px);
  border-radius: var(--x-radius); background: var(--bg-subtle);
  border: 1px solid var(--border);
}
.vr-b-body .vr-x--expert::before { /* huy hiệu ngoặc kép */
  content: "\201C"; content: "\201C" / ""; position: absolute; left: clamp(18px, 2.4vw, 26px); top: clamp(20px, 3vw, 28px);
  width: 34px; height: 34px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: var(--accent); color: var(--on-accent);
  font: 800 30px/1 Georgia, "Times New Roman", serif; padding-top: 12px;
}
.vr-b-body .vr-x--expert::after { /* đường dọc nối từ huy hiệu */
  content: ""; position: absolute; left: calc(clamp(18px, 2.4vw, 26px) + 16px); top: calc(clamp(20px, 3vw, 28px) + 44px); bottom: 26px;
  width: 2px; border-radius: 2px; background: linear-gradient(var(--accent), transparent);
}
.vr-b-body .vr-x--expert .vr-x__kicker { color: var(--accent-text); margin-bottom: 8px; }
.vr-b-body .vr-x--expert .vr-x__title { margin-bottom: 8px; font-size: 19px; line-height: 1.4; font-weight: 700; letter-spacing: -.01em; color: var(--text); }
.vr-b-body .vr-x--expert .vr-x__body { font-size: calc(16.5px + var(--x-d)); line-height: 1.75; color: var(--text-body); }
.vr-b-body .vr-x--expert .vr-x__body > p:first-child { font-size: calc(17.5px + var(--x-d)); color: var(--text); }

/* ==========================================================================
   4. STEPS — timeline số lớn + đường nối
   ========================================================================== */
.vr-b-body .vr-x-wrap > .vr-x__intro { font-size: calc(17px + var(--x-d)); line-height: 1.7; color: var(--text-body); margin: 0 0 22px; }
.vr-b-body .vr-x-wrap > .vr-x { margin-top: 0; }
.vr-b-body ol.vr-x--steps { position: relative; padding: 0; list-style: none; counter-reset: none; }
.vr-b-body ol.vr-x--steps > .vr-x__item {
  position: relative; display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 0 clamp(16px, 2.4vw, 26px);
  padding: 0 0 clamp(26px, 3.4vw, 36px); margin: 0; counter-increment: none;
}
.vr-b-body ol.vr-x--steps > .vr-x__item::before { /* đường nối dọc */
  content: ""; position: absolute; left: 31px; top: 64px; bottom: 6px; width: 2px; border-radius: 2px;
  background: linear-gradient(var(--primary-border), var(--border)); height: auto;
}
.vr-b-body ol.vr-x--steps > .vr-x__item:last-child { padding-bottom: 0; }
.vr-b-body ol.vr-x--steps > .vr-x__item:last-child::before { display: none; }
.vr-b-body ol.vr-x--steps > .vr-x__item + .vr-x__item { margin-top: 0; }
.vr-b-body .vr-x--steps .vr-x__num {
  position: relative; z-index: 1; width: 64px; height: 64px; display: flex; align-items: center; justify-content: center;
  border-radius: 50%; border: 1px solid var(--primary-border); background: var(--surface);
  font-size: 26px; font-weight: 200; letter-spacing: -.04em; line-height: 1; color: var(--primary);
  font-variant-numeric: tabular-nums;
  transition: background-color .3s var(--x-ease), color .3s var(--x-ease), border-color .3s, transform .3s var(--x-ease);
}
.vr-b-body .vr-x--steps .vr-x__item:hover .vr-x__num { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
.vr-b-body .vr-x--steps .vr-x__content {
  min-width: 0; padding: 14px 0 0; display: flex; flex-direction: column; gap: 8px;
}
.vr-b-body .vr-x--steps .vr-x__title { font-size: clamp(18px, 1.6vw, 20px); line-height: 1.35; font-weight: 700; letter-spacing: -.012em; color: var(--text); }
.vr-b-body .vr-x--steps .vr-x__body { font-size: calc(16.5px + var(--x-d)); line-height: 1.72; color: var(--text-body); }

/* ==========================================================================
   5. CARDS — lưới responsive theo data-count
   ========================================================================== */
.vr-b-body .vr-x--cards { display: grid; gap: var(--x-gap); grid-template-columns: minmax(0, 1fr); counter-reset: card; }
@container vrbody (min-width: 560px) {
  .vr-b-body .vr-x--cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .vr-b-body .vr-x--cards[data-count="1"] { grid-template-columns: minmax(0, 1fr); }
  /* số lẻ: thẻ cuối trải hết hàng để lưới không hụt */
  .vr-b-body .vr-x--cards:is([data-count="3"], [data-count="5"], [data-count="7"]) > .vr-x__card:last-child { grid-column: 1 / -1; }
}
/* cột bài tối đa 720px → ngưỡng 660px (820px cũ không bao giờ khớp) */
@container vrbody (min-width: 660px) {
  .vr-b-body .vr-x--cards:is([data-count="3"], [data-count="6"], [data-count="9"]) { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .vr-b-body .vr-x--cards:is([data-count="3"], [data-count="6"], [data-count="9"]) > .vr-x__card:last-child { grid-column: auto; }
  .vr-b-body .vr-x--cards[data-count="5"] { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .vr-b-body .vr-x--cards[data-count="5"] > .vr-x__card { grid-column: span 2; }
  .vr-b-body .vr-x--cards[data-count="5"] > .vr-x__card:nth-child(-n + 2) { grid-column: span 3; }
  .vr-b-body .vr-x--cards[data-count="5"] > .vr-x__card:last-child { grid-column: span 2; }
}
.vr-b-body .vr-x__card {
  position: relative; display: flex; flex-direction: column; gap: 10px; min-width: 0;
  padding: 24px 22px 24px; border: 1px solid var(--border); border-radius: 16px; background: var(--surface);
  counter-increment: card;
  transition: border-color .25s, box-shadow .3s var(--x-ease), transform .3s var(--x-ease);
}
.vr-b-body .vr-x__card::after { /* vạch sáng đáy khi hover */
  content: ""; position: absolute; left: 22px; right: 22px; bottom: -1px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0); transform-origin: left; transition: transform .4s var(--x-ease);
}
.vr-b-body .vr-x__card:hover { border-color: var(--primary-border); box-shadow: var(--x-shadow); transform: translateY(-3px); }
.vr-b-body .vr-x__card:hover::after { transform: scaleX(1); }
.vr-b-body .vr-x__icon {
  align-self: flex-start; min-width: 44px; height: 44px; padding: 0 10px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 12px; background: var(--primary-soft); border: 1px solid var(--primary-border);
  font-size: 22px; line-height: 1; color: var(--on-primary-soft);
}
.vr-b-body .vr-x__icon:empty { min-width: 0; height: auto; padding: 0; border: 0; background: none;
  font: 500 11px/1.3 var(--x-mono); letter-spacing: .09em; color: var(--primary); }
.vr-b-body .vr-x__icon:empty::before { content: counter(card, decimal-leading-zero); content: counter(card, decimal-leading-zero) / ""; }
.vr-b-body .vr-x__card .vr-x__title { font-size: 18px; line-height: 1.35; font-weight: 700; letter-spacing: -.012em; color: var(--text); }
.vr-b-body .vr-x__card .vr-x__body { font-size: calc(15.5px + var(--x-d)); line-height: 1.68; color: var(--text-body); }
.vr-b-body .vr-x__card .vr-x__body :is(ul, ol):not([class]) > li { font-size: calc(15px + var(--x-d)); }
/* Thẻ đầu nổi bật khi lưới có 2 hoặc 5 thẻ */
.vr-b-body .vr-x--cards[data-count="5"] > .vr-x__card:first-child { background: var(--primary-soft); border-color: var(--primary-border); }

/* ==========================================================================
   6. COMPARE — bảng so sánh
   ========================================================================== */
.vr-b-body .vr-x--compare { position: relative; }
.vr-b-body .vr-x--compare .vr-x__scroll {
  position: relative; overflow-x: auto; -webkit-overflow-scrolling: touch; overscroll-behavior-x: contain;
  max-height: min(78vh, 760px);
  border: 1px solid var(--border); border-radius: 16px; background: var(--surface);
  scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent;
}
.vr-b-body .vr-x--compare .vr-x__scroll:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.vr-b-body .vr-x--compare .vr-x__table {
  display: table; width: 100%; min-width: 560px; margin: 0; border: 0; border-collapse: separate; border-spacing: 0;
  font-size: calc(15px + var(--x-d)); line-height: 1.55;
}
.vr-b-body .vr-x--compare .vr-x__table :is(th, td) {
  padding: 14px 16px; border: 0; border-bottom: 1px solid var(--border); vertical-align: top; text-align: left; background: var(--surface);
}
.vr-b-body .vr-x--compare .vr-x__table thead th {
  position: sticky; top: 0; z-index: 2;
  background: var(--bg-subtle); border-bottom: 1px solid var(--text);
  font: 600 11px/1.35 var(--x-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--text);
}
.vr-b-body .vr-x--compare .vr-x__table tbody tr:last-child :is(th, td) { border-bottom: 0; }
/* Cột đầu: nhãn tiêu chí, dính trái khi cuộn ngang */
.vr-b-body .vr-x--compare .vr-x__table :is(tbody, thead) tr > :first-child {
  position: sticky; left: 0; z-index: 1; min-width: 150px;
  background: var(--bg-subtle); color: var(--text); font-weight: 650;
  box-shadow: inset -1px 0 0 var(--border);
}
.vr-b-body .vr-x--compare .vr-x__table thead tr > :first-child { z-index: 3; }
/* F3: ô đầu hàng là <th scope="row"> — gỡ kiểu mono viết hoa của kb.css (.vr-b-body th), giữ đúng vẻ cột nhãn cũ */
.vr-b-body .vr-x--compare .vr-x__table tbody th {
  font-family: inherit; font-size: inherit; line-height: inherit; letter-spacing: normal; text-transform: none;
}
.vr-b-body .vr-x--compare .vr-x__table caption { caption-side: top; }
.vr-b-body .vr-x--compare .vr-x__table tbody tr:hover > * { background: var(--primary-soft); }
.vr-b-body .vr-x--compare .vr-x__table tbody tr:hover > :first-child { color: var(--on-primary-soft); }
.vr-b-body .vr-x--compare .vr-x__table td strong { color: var(--text-brand); }
.vr-b-body .vr-x--compare .vr-x__note { margin-top: 10px; font-size: 13.5px; line-height: 1.55; color: var(--text-muted-strong); }
/* Gợi ý cuộn ngang: JS đặt data-scroll-hint="1" trên .vr-x__scroll khi bảng tràn và chưa được cuộn */
.vr-b-body .vr-x--compare .vr-x__scroll[data-scroll-hint="1"] {
  background:
    linear-gradient(90deg, transparent, color-mix(in srgb, var(--text) 9%, transparent)) right / 40px 100% no-repeat local,
    linear-gradient(90deg, transparent, color-mix(in srgb, var(--text) 9%, transparent)) right / 40px 100% no-repeat scroll,
    var(--surface);
}
.vr-b-body .vr-x--compare .vr-x__scroll[data-scroll-hint="1"] tbody tr > :last-child { box-shadow: inset -28px 0 24px -24px color-mix(in srgb, var(--text) 16%, transparent); }
.vr-b-body .vr-x--compare:has(.vr-x__scroll[data-scroll-hint="1"])::before {
  content: "Vuốt ngang để xem đủ bảng  \2192"; display: flex; margin-bottom: 8px;
  font: 500 10.5px/1.3 var(--x-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--text-muted-strong);
  animation: vr-x-nudge 1.8s var(--x-ease) 2;
}
@keyframes vr-x-nudge { 50% { transform: translateX(6px); } }
@media (max-width: 760px) {
  .vr-b-body .vr-x--compare .vr-x__table :is(tbody, thead) tr > :first-child { min-width: 120px; max-width: 42vw; }
  .vr-b-body .vr-x--compare .vr-x__table :is(th, td) { padding: 12px 13px; font-size: calc(14.5px + var(--x-d)); }
  .vr-b-body .vr-x--compare .vr-x__table tbody th { font-size: calc(14.5px + var(--x-d)); }
}

/* ==========================================================================
   7. STATS — số lớn
   ========================================================================== */
.vr-b-body .vr-x--stats {
  container-type: inline-size; /* V1: cỡ số theo bề rộng khối stats, không theo viewport */
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr));
  border-top: 1px solid var(--text); border-bottom: 1px solid var(--border);
}
.vr-b-body .vr-x__stat {
  display: flex; flex-direction: column; gap: 6px; min-width: 0;
  padding: 22px clamp(14px, 2vw, 22px) 22px 0;
}
.vr-b-body .vr-x__stat + .vr-x__stat { padding-left: clamp(14px, 2vw, 22px); border-left: 1px solid var(--border); }
.vr-b-body .vr-x__value {
  font-size: clamp(30px, 6cqi, 54px); line-height: 1; font-weight: 200; letter-spacing: -.045em; color: var(--accent-text);
  font-variant-numeric: tabular-nums;
  /* V1: không bẻ giữa số ("16.384", "8K/30fps") — chỉ xuống dòng ở khoảng trắng */
  overflow-wrap: normal; word-break: normal; hyphens: manual; text-wrap: balance;
}
/* Giá trị dài (> 6 ký tự hoặc không có số; JS + converter gắn --long): 2 cột, chữ nhỏ hơn */
.vr-b-body .vr-x--stats:has(.vr-x__value--long) { grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.vr-b-body .vr-x__value--long { font-size: clamp(24px, 4.4cqi, 36px); letter-spacing: -.025em; }
.vr-b-body .vr-x__label { font-size: calc(15px + var(--x-d)); line-height: 1.5; font-weight: 600; color: var(--text); }
.vr-b-body .vr-x__src { font: 500 10.5px/1.4 var(--x-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--text-muted); }
@media (max-width: 520px) {
  .vr-b-body .vr-x--stats, .vr-b-body .vr-x--stats:has(.vr-x__value--long) { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .vr-b-body .vr-x__stat { padding: 18px 12px 18px 0; border-bottom: 1px solid var(--border); }
  .vr-b-body .vr-x__stat + .vr-x__stat { padding-left: 0; border-left: 0; }
  .vr-b-body .vr-x__stat:nth-child(even) { padding-left: 14px; border-left: 1px solid var(--border); }
  .vr-b-body .vr-x__stat:nth-last-child(-n + 2):nth-child(odd), .vr-b-body .vr-x__stat:last-child { border-bottom: 0; }
  .vr-b-body .vr-x__stat:only-child { grid-column: 1 / -1; }
}

/* ==========================================================================
   8. FAQ — accordion
   ========================================================================== */
.vr-b-body .vr-x--faq { display: flex; flex-direction: column; }
.vr-b-body .vr-x--faq .vr-x__heading { margin: 0 0 18px !important; font-size: clamp(26px, 2.6vw, 34px); line-height: 1.15; }
.vr-b-body .vr-x--faq .vr-x__q { border-bottom: 1px solid var(--border); counter-increment: faq; }
.vr-b-body .vr-x--faq { counter-reset: faq; }
.vr-b-body .vr-x--faq .vr-x__heading + .vr-x__q, .vr-b-body .vr-x--faq .vr-x__q:first-of-type { border-top: 1px solid var(--text); }
.vr-b-body .vr-x--faq summary {
  position: relative; display: grid; grid-template-columns: 34px minmax(0, 1fr) 32px; align-items: start; gap: 12px;
  padding: 20px 0; list-style: none; cursor: pointer;
  font-size: calc(17px + var(--x-d)); line-height: 1.45; font-weight: 650; color: var(--text); transition: color .2s;
}
.vr-b-body .vr-x--faq summary::-webkit-details-marker { display: none; }
.vr-b-body .vr-x--faq summary::before {
  content: counter(faq, decimal-leading-zero); content: counter(faq, decimal-leading-zero) / ""; padding-top: .32em;
  font: 500 11px/1.3 var(--x-mono); letter-spacing: .06em; color: var(--primary);
}
.vr-b-body .vr-x--faq summary::after {
  content: ""; width: 30px; height: 30px; margin-top: -3px; border-radius: 50%; border: 1px solid var(--border);
  background:
    linear-gradient(var(--primary), var(--primary)) center / 11px 1.5px no-repeat,
    linear-gradient(var(--primary), var(--primary)) center / 1.5px 11px no-repeat, var(--surface);
  transition: transform .3s var(--x-ease), background-color .2s, border-color .2s;
}
.vr-b-body .vr-x--faq summary:hover { color: var(--primary); }
.vr-b-body .vr-x--faq summary:hover::after { border-color: var(--primary-border); }
.vr-b-body .vr-x--faq :is(details[open], details.is-open) > summary { color: var(--text-brand); }
.vr-b-body .vr-x--faq :is(details[open], details.is-open) > summary::after {
  transform: rotate(45deg); border-color: var(--primary);
  background:
    linear-gradient(var(--on-primary), var(--on-primary)) center / 11px 1.5px no-repeat,
    linear-gradient(var(--on-primary), var(--on-primary)) center / 1.5px 11px no-repeat, var(--primary);
}
.vr-b-body .vr-x--faq .vr-x__a {
  padding: 0 44px 22px 46px; font-size: calc(16.5px + var(--x-d)); line-height: 1.75; color: var(--text-body);
}
.vr-b-body .vr-x--faq .vr-x__a > * { margin: 0; }
.vr-b-body .vr-x--faq .vr-x__a > * + * { margin-top: .7em; }
/* Mở/đóng mượt do post-articles.js animate height .vr-x__a; .is-open đặt ngay khi bắt đầu mở */
@media (max-width: 520px) {
  .vr-b-body .vr-x--faq summary { grid-template-columns: 26px minmax(0, 1fr) 30px; gap: 10px; font-size: calc(16px + var(--x-d)); }
  .vr-b-body .vr-x--faq .vr-x__a { padding: 0 0 20px 36px; font-size: calc(16px + var(--x-d)); }
}

/* ==========================================================================
   9. CTA + SHOWCASE — band thương hiệu
   ========================================================================== */
.vr-b-body :is(.vr-x--cta, .vr-x--showcase) {
  position: relative; overflow: hidden; isolation: isolate;
  display: grid; grid-template-columns: minmax(0, 1fr); align-items: start; gap: 22px;
  padding: clamp(26px, 4vw, 44px); border-radius: 22px;
  background: linear-gradient(135deg, var(--surface-brand), var(--surface-brand-deep));
  color: var(--text-on-brand);
}
.vr-b-body :is(.vr-x--cta, .vr-x--showcase)::before { /* vòng tròn quét 360° trang trí */
  content: ""; position: absolute; z-index: -1; right: -90px; top: -120px; width: 320px; height: 320px; border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--secondary-on-dark) 35%, transparent);
  box-shadow: 0 0 0 40px color-mix(in srgb, var(--text-on-brand) 3%, transparent), 0 0 0 80px color-mix(in srgb, var(--text-on-brand) 2%, transparent);
}
.vr-b-body :is(.vr-x--cta, .vr-x--showcase)::after {
  content: ""; position: absolute; z-index: -1; left: 0; right: 0; bottom: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--secondary-on-dark));
}
.vr-b-body :is(.vr-x--cta, .vr-x--showcase) .vr-x__body { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.vr-b-body :is(.vr-x--cta, .vr-x--showcase) :is(p, li, strong, .vr-x__body a:not(.vr-x__btn)) { color: var(--text-on-brand); }
.vr-b-body :is(.vr-x--cta, .vr-x--showcase) .vr-x__body > p { max-width: 38em; font-size: calc(16px + var(--x-d)); line-height: 1.65; opacity: .92; }
.vr-b-body :is(.vr-x--cta, .vr-x--showcase) .vr-x__body > .vr-x__title {
  opacity: 1; max-width: 22em; font-size: clamp(22px, 2.5vw, 30px); line-height: 1.18; font-weight: 800; letter-spacing: -.022em; text-wrap: balance;
}
.vr-b-body :is(.vr-x--cta, .vr-x--showcase) .vr-x__kicker { color: var(--secondary-on-dark); }
.vr-b-body .vr-x--showcase .vr-x__kicker::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent);
  animation: vr-x-pulse 2.4s var(--x-ease) 3; /* F8: 3 nhịp rồi dừng (2.2.2: không chuyển động > 5s tự chạy) */
}
@keyframes vr-x-pulse { 50% { box-shadow: 0 0 0 8px color-mix(in srgb, var(--accent) 0%, transparent); } }
.vr-b-body .vr-x__actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-start; }
.vr-b-body :is(.vr-x--cta, .vr-x--showcase) .vr-x__actions {
  padding-top: 20px; border-top: 1px solid color-mix(in srgb, var(--text-on-brand) 16%, transparent);
}
.vr-b-body .vr-x__btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 12px 22px;
  border-radius: 999px; border: 1px solid color-mix(in srgb, var(--text-on-brand) 60%, transparent); background: transparent;
  color: var(--text-on-brand) !important; font-size: 15px; font-weight: 600; line-height: 1.3; text-align: center; text-decoration: none !important;
  white-space: nowrap; transition: background-color .2s, border-color .2s, transform .25s var(--x-ease);
}
.vr-b-body .vr-x__btn:hover { background: color-mix(in srgb, var(--text-on-brand) 12%, transparent); border-color: var(--text-on-brand); }
.vr-b-body .vr-x__btn--primary { border-color: var(--accent); background: var(--accent); color: var(--on-accent) !important; }
.vr-b-body .vr-x__btn--primary::after { content: "\2192"; content: "\2192" / ""; transition: transform .25s var(--x-ease); }
.vr-b-body .vr-x__btn--primary:hover { border-color: var(--accent-hover); background: var(--accent-hover); }
.vr-b-body .vr-x__btn--primary:hover::after { transform: translateX(3px); }
.vr-b-body .vr-x__btn:active { transform: translateY(1px); }
.vr-b-body :is(.vr-x--cta, .vr-x--showcase) a:focus-visible { outline-color: var(--focus-ring-on-brand); }
@media (max-width: 760px) {
  .vr-b-body :is(.vr-x--cta, .vr-x--showcase) { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .vr-b-body .vr-x__actions { justify-content: flex-start; }
}
@media (max-width: 420px) {
  .vr-b-body .vr-x__actions { flex-direction: column; align-items: stretch; }
  .vr-b-body .vr-x__btn { white-space: normal; }
}

/* ==========================================================================
   10. RELATED — danh sách thẻ đọc tiếp
   ========================================================================== */
.vr-b-body .vr-x--related { padding-top: 14px; border-top: 1px solid var(--text); }
.vr-b-body .vr-x--related .vr-x__kicker { color: var(--text-muted-strong); margin-bottom: 14px; }
.vr-b-body .vr-x--related .vr-x__kicker::before { content: ""; width: 18px; height: 1px; background: var(--primary); }
.vr-b-body .vr-x__links {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); gap: 10px;
  padding: 0; list-style: none; counter-reset: rel;
}
.vr-b-body .vr-x__links > li { margin: 0; padding: 0; counter-increment: rel; }
.vr-b-body .vr-x__links > li::before { content: none; }
/* V2/F13: bài liên quan chưa đăng (vr-posts-runtime.php đổi <a> thành span.vr-x__pending) → ẩn; li ẩn không tăng counter(rel)
   nên số thứ tự vẫn liền mạch. Không còn bài nào đã đăng → ẩn cả khối. */
.vr-b-body .vr-x__links > li:has(> .vr-x__pending:only-child) { display: none; }
.vr-b-body .vr-x--related:not(:has(.vr-x__links > li > a)) { display: none; }
.vr-b-body .vr-x__links a {
  position: relative; height: 100%; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 14px;
  padding: 16px 18px; border: 1px solid var(--border); border-radius: 14px; background: var(--surface);
  font-size: calc(15.5px + var(--x-d)); line-height: 1.45; font-weight: 600; color: var(--text); text-decoration: none;
  transition: border-color .2s, background-color .2s, color .2s, transform .3s var(--x-ease);
}
.vr-b-body .vr-x__links a::before { content: counter(rel, decimal-leading-zero); content: counter(rel, decimal-leading-zero) / ""; font: 500 11px/1 var(--x-mono); letter-spacing: .06em; color: var(--primary); }
.vr-b-body .vr-x__links a::after {
  content: "\2192"; content: "\2192" / ""; width: 30px; height: 30px; display: flex; align-items: center; justify-content: center; border-radius: 50%;
  background: var(--primary-soft); color: var(--primary); font-weight: 400;
  transition: background-color .2s, color .2s, transform .3s var(--x-ease);
}
.vr-b-body .vr-x__links a:hover { border-color: var(--primary-border); background: var(--primary-soft); color: var(--on-primary-soft); }
.vr-b-body .vr-x__links a:hover::after { background: var(--primary); color: var(--on-primary); transform: translateX(3px); }

/* ==========================================================================
   11. GALLERY
   ========================================================================== */
.vr-b-body .vr-x--gallery { display: grid; gap: 12px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.vr-b-body .vr-x--gallery > .vr-x__fig:only-child { grid-column: 1 / -1; }
.vr-b-body .vr-x--gallery > .vr-x__fig:first-child:nth-last-child(odd) { grid-column: 1 / -1; } /* số ảnh lẻ: ảnh đầu full */
@container vrbody (min-width: 660px) {
  .vr-b-body .vr-x--gallery:has(> .vr-x__fig:nth-child(6)) { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .vr-b-body .vr-x--gallery:has(> .vr-x__fig:nth-child(6)) > .vr-x__fig:first-child { grid-column: auto; }
}
.vr-b-body .vr-x__fig { position: relative; display: flex; flex-direction: column; gap: 8px; min-width: 0; margin: 0; }
.vr-b-body .vr-x__fig img {
  display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 14px; background: var(--bg-subtle);
  transition: transform .5s var(--x-ease), filter .3s;
}
.vr-b-body .vr-x--gallery > .vr-x__fig:first-child:nth-last-child(odd) img { aspect-ratio: 16 / 9; }
.vr-b-body .vr-x__fig:hover img { filter: saturate(1.08) contrast(1.03); }
.vr-b-body .vr-x__fig figcaption { margin: 0; font-size: 13.5px; line-height: 1.5; color: var(--text-muted-strong); text-align: left; }
.vr-b-body .vr-x__fig figcaption::before { content: ""; display: inline-block; width: 14px; height: 1px; margin: 0 8px .3em 0; vertical-align: middle; background: var(--primary); }

/* ==========================================================================
   12. Xuất hiện khi cuộn — post-articles.js: html.vr-x-js + .is-in, style="--i:n" để so le
   (không JS = hiện bình thường)
   ========================================================================== */
html.vr-x-js .vr-b-body :is(.vr-x--cards .vr-x__card, .vr-x--steps .vr-x__item) {
  transition: opacity .6s var(--x-ease), transform .6s var(--x-ease), border-color .25s, box-shadow .3s var(--x-ease);
  transition-delay: calc(min(var(--i, 0), 6) * 70ms), calc(min(var(--i, 0), 6) * 70ms), 0s, 0s;
}
html.vr-x-js .vr-b-body :is(.vr-x--cards .vr-x__card, .vr-x--steps .vr-x__item):not(.is-in) { opacity: .18; transform: translateY(14px); }
html.vr-x-js .vr-b-body .vr-x--cards .vr-x__card.is-in:hover { transition-delay: 0s; }
html.vr-x-js .vr-b-body .vr-x--steps .vr-x__item.is-in .vr-x__num { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
html.vr-x-js .vr-b-body .vr-x--steps .vr-x__item.is-in::before { animation: vr-x-line .9s var(--x-ease) both; transform-origin: top; }
@keyframes vr-x-line { from { transform: scaleY(0); } }
html.vr-x-js .vr-b-body .vr-x--stats .vr-x__stat { transition: opacity .6s var(--x-ease), transform .6s var(--x-ease); }
html.vr-x-js .vr-b-body .vr-x--stats:not(.is-in) .vr-x__stat { opacity: .18; transform: translateY(10px); }
html.vr-x-js .vr-b-body .vr-x--stats.is-in .vr-x__stat:nth-child(2) { transition-delay: 80ms; }
html.vr-x-js .vr-b-body .vr-x--stats.is-in .vr-x__stat:nth-child(3) { transition-delay: 160ms; }
html.vr-x-js .vr-b-body .vr-x--stats.is-in .vr-x__stat:nth-child(n + 4) { transition-delay: 240ms; }
.vr-b-body .vr-x__fig img.vr-zoomable { cursor: zoom-in; }

/* ==========================================================================
   13. Nhỏ gọn ≤ 480px (375px)
   ========================================================================== */
@media (max-width: 480px) {
  .vr-b-body .vr-x--tldr .vr-x__list > li { padding-left: 34px; font-size: calc(16px + var(--x-d)); }
  .vr-b-body .vr-x--expert { padding: 20px 18px 20px 18px; padding-top: 66px; }
  .vr-b-body .vr-x--expert::before { top: 20px; left: 18px; }
  .vr-b-body .vr-x--expert::after { display: none; }
  .vr-b-body ol.vr-x--steps > .vr-x__item { grid-template-columns: 46px minmax(0, 1fr); gap: 0 14px; }
  .vr-b-body ol.vr-x--steps > .vr-x__item::before { left: 22px; top: 46px; }
  .vr-b-body .vr-x--steps .vr-x__num { width: 46px; height: 46px; font-size: 19px; }
  .vr-b-body .vr-x--steps .vr-x__content { padding-top: 8px; }
  .vr-b-body .vr-x__card { padding: 20px 18px; }
  .vr-b-body :is(.vr-x--cta, .vr-x--showcase) { border-radius: 18px; padding: 24px 20px; }
  .vr-b-body .vr-x--gallery { grid-template-columns: minmax(0, 1fr); }
  .vr-b-body .vr-x__links a { padding: 14px 14px; gap: 12px; }
}

/* ==========================================================================
   14. Giảm chuyển động + in
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  .vr-b-body .vr-x, .vr-b-body .vr-x *, .vr-b-body .vr-x *::before, .vr-b-body .vr-x *::after, .vr-b-body .vr-x-wrap, .vr-b-body .vr-x-wrap * {
    transition: none !important; animation: none !important;
  }
  html.vr-x-js .vr-b-body :is(.vr-x__card, .vr-x__item, .vr-x__stat) { opacity: 1 !important; transform: none !important; }
  .vr-b-body .vr-x__card:hover, .vr-b-body .vr-x__links a:hover::after { transform: none; }
}
@media print {
  html.vr-x-js .vr-b-body :is(.vr-x__card, .vr-x__item, .vr-x__stat) { opacity: 1 !important; transform: none !important; }
  .vr-b-body :is(.vr-x--cta, .vr-x--showcase) { background: none; color: var(--text); border: 1px solid var(--border); }
  .vr-b-body :is(.vr-x--cta, .vr-x--showcase) :is(p, .vr-x__btn) { color: var(--text) !important; }
  .vr-b-body .vr-x--faq details > .vr-x__a { display: block; }
  .vr-b-body .vr-x--compare .vr-x__scroll { max-height: none; overflow: visible; }
}

/* ==========================================================================
   15. Nâng cấp QA (2026-10): container query theo cột bài, thẻ có số thứ tự,
   showcase sáng tách biệt với CTA, ảnh trong bài có khung chỉn chu
   ========================================================================== */
/* Cột bài ~720px dù viewport rộng → lưới bám theo bề rộng cột, không theo viewport */
.vr-b-body { container: vrbody / inline-size; }

/* Thẻ không có icon: số thứ tự mono + vạch, đầu thẻ có nhịp */
.vr-b-body .vr-x__card:not(:has(> .vr-x__icon))::before {
  content: counter(card, decimal-leading-zero); content: counter(card, decimal-leading-zero) / "";
  display: flex; align-items: center; gap: 10px;
  font: 500 11px/1 var(--x-mono); letter-spacing: .09em; color: var(--primary);
}
.vr-b-body .vr-x__card:not(:has(> .vr-x__icon)) { padding-top: 20px; }
.vr-b-body .vr-x__card .vr-x__title { text-wrap: balance; }
.vr-b-body .vr-x__card {
  background:
    radial-gradient(140% 70% at 100% 0%, color-mix(in srgb, var(--primary-soft) 70%, transparent) 0%, transparent 46%),
    var(--surface);
}

/* SHOWCASE: biến thể sáng (CTA giữ band xanh) — tránh 2 band tối dính nhau */
.vr-b-body .vr-x--showcase {
  background:
    radial-gradient(90% 120% at 100% 0%, color-mix(in srgb, var(--accent) 14%, transparent) 0%, transparent 55%),
    var(--primary-soft);
  border: 1px solid var(--primary-border);
  color: var(--text);
}
.vr-b-body .vr-x--showcase::before { border-color: var(--primary-border);
  box-shadow: 0 0 0 40px color-mix(in srgb, var(--primary) 4%, transparent), 0 0 0 80px color-mix(in srgb, var(--primary) 3%, transparent); }
.vr-b-body .vr-x--showcase :is(p, li, strong, .vr-x__body a:not(.vr-x__btn)) { color: var(--text-body); }
.vr-b-body .vr-x--showcase .vr-x__body > .vr-x__title { color: var(--text-brand); }
.vr-b-body .vr-x--showcase .vr-x__kicker { color: var(--accent-text); }
.vr-b-body .vr-x--showcase .vr-x__actions { border-top-color: var(--primary-border); }
.vr-b-body .vr-x--showcase .vr-x__btn:not(.vr-x__btn--primary) { color: var(--text) !important; border-color: var(--text-muted-strong); } /* F12: ≥3:1 trên primary-soft + vùng tint */
.vr-b-body .vr-x--showcase .vr-x__btn:not(.vr-x__btn--primary):hover { background: var(--surface); border-color: var(--primary); }
.vr-b-body .vr-x--showcase .vr-x__btn--primary { background: var(--primary); border-color: var(--primary); color: var(--on-primary) !important; }
.vr-b-body .vr-x--showcase .vr-x__btn--primary:hover { background: var(--primary-hover, var(--surface-brand-deep)); border-color: var(--primary-hover, var(--surface-brand-deep)); }
.vr-b-body .vr-x--showcase a:focus-visible { outline-color: var(--focus-ring); }
/* Showcase + CTA đứng liền (18 bài): tách hai band thương hiệu bằng khoảng thở rõ ràng */
.vr-b-body > .vr-x--showcase + .vr-x--cta, .vr-b-body > .vr-x--cta + .vr-x--showcase { margin-top: clamp(36px, 5vw, 56px); }

/* Ảnh core trong bài: bo góc, caption dạng chú thích biên tập */
.vr-b-body > .wp-block-image { margin-top: clamp(28px, 4vw, 44px); margin-bottom: 0; }
.vr-b-body > .wp-block-image img { display: block; width: 100%; height: auto; border-radius: 16px; background: var(--bg-subtle); }
.vr-b-body > .wp-block-image .wp-element-caption {
  margin: 12px 0 0; font-size: 13.5px; line-height: 1.55; color: var(--text-muted-strong); text-align: left;
}
.vr-b-body > .wp-block-image .wp-element-caption::before {
  content: ""; display: inline-block; width: 14px; height: 1px; margin: 0 8px .3em 0; vertical-align: middle; background: var(--primary);
}

/* Bảng core ngoài compare: không tràn ngang trên mobile */
.vr-b-body > .wp-block-table { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Stats mobile: số lẻ → ô cuối trải hết hàng, không để trống nửa lưới */
@media (max-width: 520px) {
  .vr-b-body .vr-x__stat:last-child:nth-child(odd) { grid-column: 1 / -1; padding-right: 0; }
  .vr-b-body .vr-x__label { font-size: calc(14.5px + var(--x-d)); font-weight: 550; }
}

/* ==========================================================================
   16. QA hiển thị (2026-10-12, display.md)
   ========================================================================== */
/* Nút CTA/showcase nhãn dài: xuống dòng thay vì bị overflow:hidden của band cắt (421–760px) */
.vr-b-body .vr-x__btn { white-space: normal; max-width: 100%; text-align: center; text-wrap: balance; }

/* Thẻ: số lẻ bất kỳ (vd 13) ở chế độ 2 cột → thẻ cuối trải hết hàng, không mồ côi */
@container vrbody (min-width: 560px) {
  .vr-b-body .vr-x--cards:not([data-count="3"], [data-count="5"], [data-count="6"], [data-count="9"]) > .vr-x__card:last-child:nth-child(odd):not(:only-child) { grid-column: 1 / -1; }
}
@container vrbody (min-width: 660px) {
  .vr-b-body .vr-x--cards:is([data-count="3"], [data-count="6"], [data-count="9"]) .vr-x__card { padding: 20px 18px; }
}

/* Stats 2 cột (có giá trị dài, ≥521px): kẻ dọc chỉ giữa 2 cột, kẻ ngang giữa các hàng, ô lẻ cuối trải hết hàng */
@media (min-width: 521px) {
  .vr-b-body .vr-x--stats:has(.vr-x__value--long) > .vr-x__stat:nth-child(odd) { padding-left: 0; border-left: 0; }
  .vr-b-body .vr-x--stats:has(.vr-x__value--long) > .vr-x__stat:nth-child(even) { padding-left: clamp(14px, 2vw, 22px); border-left: 1px solid var(--border); }
  .vr-b-body .vr-x--stats:has(.vr-x__value--long) > .vr-x__stat:not(:nth-last-child(-n + 2)),
  .vr-b-body .vr-x--stats:has(.vr-x__value--long) > .vr-x__stat:nth-last-child(2):nth-child(odd) { border-bottom: 1px solid var(--border); }
  .vr-b-body .vr-x--stats:has(.vr-x__value--long) > .vr-x__stat:last-child:nth-child(odd) { grid-column: 1 / -1; border-bottom: 0; }
}

/* Compare trên điện thoại: cột nhãn dính trái gọn hơn (≤ ~32%), không cuộn dọc lồng nhau */
@media (max-width: 760px) {
  .vr-b-body .vr-x--compare .vr-x__scroll { max-height: none; }
  .vr-b-body .vr-x--compare .vr-x__table thead th { position: static; }
  .vr-b-body .vr-x--compare .vr-x__table thead tr > :first-child { position: sticky; left: 0; }
}
@media (max-width: 480px) {
  .vr-b-body .vr-x--compare .vr-x__table { min-width: calc(110px + var(--cols, 3) * 150px); }
  .vr-b-body .vr-x--compare .vr-x__table :is(tbody th, td) { font-size: calc(14px + var(--x-d)); }
  .vr-b-body .vr-x--compare .vr-x__table :is(tbody, thead) tr > :first-child { min-width: 96px; max-width: 32vw; padding-right: 10px; overflow-wrap: anywhere; hyphens: auto; }
}

/* In: không bao giờ in trạng thái chưa reveal */
@media print {
  .vr-b-body :is(.vr-x__card, .vr-x__item, .vr-x__stat) { opacity: 1 !important; transform: none !important; }
  .vr-b-body .vr-x--compare .vr-x__table { min-width: 0; }
}

/* Code inline / URL trần dài: xuống dòng trong cột đọc */
.vr-b-body :not(pre) > code { overflow-wrap: anywhere; word-break: normal; }
.vr-b-body p a[href^="http"] { overflow-wrap: anywhere; }