/* ===== Section commons ===== */
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 32px; }
.sec-head .kicker { margin-bottom: 10px; }
.sec-head__ctrl { display: flex; gap: 8px; flex-shrink: 0; }
.pillar { position: relative; padding-block: var(--section-y); overflow: hidden; }

/* ===== 01 Vé máy bay ===== */
.pillar--air { --accent: var(--air); --accent-ink: var(--air-ink); background: linear-gradient(180deg, #fff 0%, var(--air-soft) 62%, #fff 100%); }
.pillar--air::before { content: ""; position: absolute; right: -10%; top: -6%; width: 60%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(242,106,33,.16), transparent 62%); pointer-events: none; }
.air__grid { position: relative; display: grid; gap: 40px; }
.air__media { position: relative; }
.air__photo { width: 100%; aspect-ratio: 4 / 3.4; object-fit: cover; border-radius: var(--r-xl); box-shadow: var(--shadow-3); }
.air__route { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.air__route path#air-arc { fill: none; stroke: rgba(255,255,255,.85); stroke-width: 2; stroke-dasharray: 2 8; stroke-linecap: round; }
.air__dot { fill: #fff; stroke: var(--air); stroke-width: 3; }
.air__plane path { fill: #fff; }
.air__notice { position: absolute; left: 12px; right: 12px; bottom: 12px; display: flex; gap: 12px; align-items: center; padding: 12px 14px; border-radius: 16px; background: rgba(255,255,255,.96); box-shadow: var(--shadow-3); }
.air__notice-ico { width: 40px; height: 40px; flex-shrink: 0; border-radius: 12px; background: var(--air); color: #fff; display: grid; place-items: center; font-size: 20px; }
.air__notice b { display: block; font-size: 14.5px; line-height: 1.3; }
.air__notice small { display: block; font-size: 12.5px; color: var(--muted); }
.air__stamp { position: absolute; top: 16px; right: 16px; display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; border-radius: 99px; background: rgba(15,16,18,.55); backdrop-filter: blur(8px); color: #fff; font-family: var(--mono); font-weight: 600; font-size: 13px; }
.air__copy .lead { margin-bottom: 28px; }
.tickets { display: grid; gap: 10px; }
.ticket { position: relative; display: grid; grid-template-columns: 58px 1fr auto; align-items: center; min-height: 76px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; transition: transform .25s var(--ease-out), box-shadow .25s, border-color .25s; }
.ticket:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); border-color: rgba(185,69,12,.35); }
.ticket__stub { align-self: stretch; display: grid; place-items: center; font-size: 24px; color: var(--air-ink); background: var(--air-soft); border-radius: 13px 0 0 13px; border-right: 2px dashed rgba(185,69,12,.28); position: relative; }
.ticket__stub::before, .ticket__stub::after { content: ""; position: absolute; right: -8px; width: 14px; height: 14px; border-radius: 50%; background: var(--air-soft); border: 1px solid var(--line); }
.ticket__stub::before { top: -8px; clip-path: inset(50% 0 0 0); }
.ticket__stub::after { bottom: -8px; clip-path: inset(0 0 50% 0); }
.ticket__body { padding: 12px 8px 12px 16px; min-width: 0; }
.ticket__body b { display: block; font-size: 16px; line-height: 1.3; }
.ticket__body small { display: block; font-size: 13.5px; color: var(--muted); line-height: 1.4; margin-top: 2px; }
.ticket__go { padding-right: 16px; font-size: 18px; color: var(--muted); transition: transform .3s var(--ease-out), color .3s; }
.ticket:hover .ticket__go { transform: translateX(4px); color: var(--air-ink); }
.air__row { display: grid; gap: 16px; margin-top: 40px; }
.vdh-banner { display: grid; gap: 16px; align-items: center; padding: 22px; border-radius: var(--r-lg); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1); transition: box-shadow .25s, transform .25s var(--ease-out); }
.vdh-banner:hover { box-shadow: var(--shadow-2); transform: translateY(-2px); }
.vdh-banner__logo { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; }
.vdh-banner__logo img { width: 150px; height: auto; }
.vdh-banner__logo small { font-size: 11px; font-weight: 500; color: #64748B; white-space: nowrap; line-height: 1.2; }
.vdh-banner__txt { font-size: 15px; color: var(--ink-2); }
.vdh-banner .btn { justify-self: start; }
.tool-card { position: relative; display: block; min-height: 180px; border-radius: var(--r-lg); overflow: hidden; background: var(--night); }
.tool-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease-out); }
.tool-card:hover img { transform: scale(1.05); }
.tool-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(15,16,18,.88), rgba(15,16,18,.1) 70%); }
.tool-card__cap { position: absolute; left: 20px; right: 20px; bottom: 18px; z-index: 1; color: #fff; }
.tool-card__cap b { display: block; font-size: 17px; }
.tool-card__cap small { display: block; font-size: 13.5px; color: rgba(255,255,255,.88); }
@media (min-width: 640px) {
  .tickets { grid-template-columns: 1fr 1fr; }
  .air__notice { left: -16px; right: auto; bottom: 28px; max-width: 340px; }
  .vdh-banner { grid-template-columns: auto 1fr auto; gap: 24px; }
  .vdh-banner .btn { justify-self: end; }
}
@media (min-width: 1024px) {
  .air__grid { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 64px; align-items: center; }
  .air__photo { aspect-ratio: 4 / 4.6; }
  .air__row { grid-template-columns: 1.5fr 1fr; }
  .vdh-banner { grid-template-columns: auto 1fr; }
  .vdh-banner .btn { grid-column: 1 / -1; justify-self: start; }
}
@media (min-width: 1280px) { .vdh-banner { grid-template-columns: auto 1fr auto; } .vdh-banner .btn { grid-column: auto; justify-self: end; } }

/* ===== 02 Công nghệ ===== */
.pillar--tech { --accent: var(--tech-hi); --accent-ink: var(--tech-hi); background: #0B0C10; color: var(--on-night); }
.tech__grid-bg { position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(ellipse 80% 70% at 70% 20%, #000 20%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse 80% 70% at 70% 20%, #000 20%, transparent 75%); }
.pillar--tech::after { content: ""; position: absolute; right: -10%; top: -20%; width: 55%; aspect-ratio: 1; background: radial-gradient(circle, rgba(109,114,246,.22), transparent 62%); pointer-events: none; }
.pillar--tech .container { position: relative; z-index: 1; }
.pillar--tech .h2 { color: #fff; }
.pillar--tech .lead { color: var(--on-night-2); }
.tech__head { display: grid; gap: 36px; align-items: end; margin-bottom: 40px; }
.codewin { background: #15161B; border: 1px solid rgba(255,255,255,.1); border-radius: 18px; box-shadow: 0 30px 80px -30px rgba(109,114,246,.45); overflow: hidden; }
.codewin__bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,.08); }
.codewin__bar span { width: 11px; height: 11px; border-radius: 50%; background: #3A3C44; }
.codewin__bar span:first-child { background: #FF5F57; } .codewin__bar span:nth-child(2) { background: #FEBC2E; } .codewin__bar span:nth-child(3) { background: #28C840; }
.codewin__bar em { margin-left: 10px; font-style: normal; font-family: var(--mono); font-size: 12.5px; color: var(--on-night-2); }
.codewin__code { margin: 0; padding: 18px 20px; font-family: var(--mono); font-size: 13px; line-height: 1.75; color: #E8E6E1; overflow-x: auto; white-space: pre; }
.t-c { color: #9A9EA8; } .t-k { color: #B3B6FF; } .t-s { color: #6BE3A6; } .t-f { color: #FFAA74; }
.codewin__foot { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 16px 16px; }
.codewin__foot span { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600; color: #E8E6E1; padding: 5px 10px; border-radius: 99px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); }
.codewin__foot .ph-fill { color: var(--csr-hi); }
.bento { display: grid; gap: 12px; }
.bento__item a { position: relative; display: grid; gap: 6px; height: 100%; padding: 22px; border-radius: 18px; background: rgba(255,255,255,.035); border: 1px solid rgba(255,255,255,.09); overflow: hidden; transition: border-color .3s, transform .3s var(--ease-out); }
.bento__item a::before { content: ""; position: absolute; inset: 0; background: radial-gradient(300px circle at var(--sx, 50%) var(--sy, 0%), rgba(167,171,255,.16), transparent 60%); opacity: 0; transition: opacity .3s; pointer-events: none; }
.bento__item a:hover { border-color: rgba(167,171,255,.5); transform: translateY(-2px); }
.bento__item a:hover::before { opacity: 1; }
.bento code { font-family: var(--mono); font-size: 12.5px; color: var(--tech-hi); }
.bento__ico { font-size: 28px; color: #fff; margin: 14px 0 4px; }
.bento b { font-size: 18px; color: #fff; line-height: 1.3; }
.bento span { font-size: 14.5px; color: var(--on-night-2); line-height: 1.55; }
.products { margin-top: 44px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,.1); }
.products__title { font-weight: 700; color: #fff; margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }
.products__title::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--csr-hi); box-shadow: 0 0 0 4px rgba(94,219,156,.18); }
.products__list { display: grid; grid-template-columns: 1fr; gap: 10px; }
.products__list a { display: grid; grid-template-columns: 1fr auto; gap: 2px 10px; padding: 14px 16px; border-radius: 14px; border: 1px solid rgba(255,255,255,.12); transition: background .25s, border-color .25s; }
.products__list a:hover { background: rgba(255,255,255,.05); border-color: rgba(255,255,255,.3); }
.products__list b { color: #fff; font-size: 15px; }
.products__list span { grid-column: 1; font-size: 13px; color: var(--on-night-2); }
.products__list .ph { grid-column: 2; grid-row: 1 / 3; align-self: center; color: var(--on-night-2); }
@media (min-width: 640px) {
  .bento { grid-template-columns: 1fr 1fr; }
  .bento__item--wide { grid-column: 1 / -1; }
  .products__list { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .tech__head { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 64px; }
  .bento { grid-template-columns: repeat(4, 1fr); }
  .bento__item--wide { grid-column: span 2; }
  .bento__item:last-child { grid-column: span 2; }
  .products__list { grid-template-columns: repeat(5, 1fr); }
}

/* ===== 03 Marketing số ===== */
.pillar--mkt { color: #fff; background: linear-gradient(118deg, #4C1D95 0%, #86198F 30%, #A3124F 62%, #B93A0C 100%); }
.mkt__glow { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(40% 50% at 85% 15%, rgba(255,255,255,.18), transparent 70%), radial-gradient(35% 45% at 10% 90%, rgba(255,180,90,.22), transparent 70%); }
.mkt__glow::after { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(255,255,255,.16) 1px, transparent 1px); background-size: 22px 22px; mask-image: linear-gradient(to bottom, #000, transparent 80%); -webkit-mask-image: linear-gradient(to bottom, #000, transparent 80%); }
.pillar--mkt .container { position: relative; z-index: 1; }
.pillar--mkt .lead { color: #fff; opacity: .94; margin-bottom: 28px; }
.mkt__grid { display: grid; gap: 40px; align-items: center; }
.mkt__viz { position: relative; display: grid; gap: 14px; }
.ai-card { background: var(--surface); color: var(--ink); border-radius: 20px; padding: 18px; box-shadow: 0 30px 70px -30px rgba(30,0,20,.6); }
.ai-card__q { display: flex; gap: 10px; align-items: flex-start; font-weight: 600; font-size: 15px; padding: 12px 14px; border-radius: 14px; background: var(--bg-soft); }
.ai-card__q .ph { font-size: 20px; color: var(--mkt-ink); margin-top: 1px; }
.ai-card__a { padding: 14px 4px 2px; }
.ai-card__bot { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 700; color: var(--mkt-ink); }
.ai-card__a p { font-size: 15px; color: var(--ink-2); margin: 6px 0 10px; }
.ai-card__src { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 700; padding: 5px 10px; border-radius: 99px; background: var(--mkt-soft); color: var(--mkt-ink); }
.chart { margin: 0; padding: 16px 18px; border-radius: 20px; background: rgba(15,16,18,.34); border: 1px solid rgba(255,255,255,.22); backdrop-filter: blur(6px); }
.chart figcaption { display: flex; justify-content: space-between; font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.chart figcaption em { font-style: normal; font-weight: 500; opacity: .9; }
.chart__svg { width: 100%; height: auto; overflow: visible; }
.chart__grid line { stroke: rgba(255,255,255,.18); stroke-dasharray: 3 5; }
.chart__area { fill: url(#chart-fill); opacity: 0; transition: opacity 1.2s .6s; }
.chart__line { fill: none; stroke: #fff; stroke-width: 3; stroke-linejoin: round; stroke-linecap: round; stroke-dasharray: 520; stroke-dashoffset: 520; transition: stroke-dashoffset 1.8s var(--ease-out); }
.chart__end { fill: #fff; opacity: 0; transition: opacity .4s 1.6s; }
.chart.is-in .chart__line { stroke-dashoffset: 0; }
.chart.is-in .chart__area, .chart.is-in .chart__end { opacity: 1; }
.chart__bars { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; align-items: end; height: 44px; margin-top: 10px; }
.chart__bars span { height: var(--h); background: rgba(255,255,255,.55); border-radius: 4px 4px 2px 2px; transform: scaleY(0); transform-origin: bottom; transition: transform .9s var(--ease-out); }
.chart.is-in .chart__bars span { transform: scaleY(1); }
.chart.is-in .chart__bars span:nth-child(2) { transition-delay: .08s; } .chart.is-in .chart__bars span:nth-child(3) { transition-delay: .16s; } .chart.is-in .chart__bars span:nth-child(4) { transition-delay: .24s; } .chart.is-in .chart__bars span:nth-child(5) { transition-delay: .32s; } .chart.is-in .chart__bars span:nth-child(6) { transition-delay: .4s; }
.mkt__cards { display: grid; gap: 12px; margin-top: 48px; }
.mkt__cards a { display: grid; grid-template-columns: auto 1fr; gap: 2px 14px; padding: 18px 20px; border-radius: 18px; background: rgba(15,16,18,.30); border: 1px solid rgba(255,255,255,.2); transition: background .3s, transform .3s var(--ease-out), border-color .3s; }
.mkt__cards a:hover { background: rgba(15,16,18,.46); border-color: rgba(255,255,255,.45); transform: translateY(-2px); }
.mkt__cards .ph { grid-row: 1 / 3; font-size: 26px; width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; background: rgba(255,255,255,.14); }
.mkt__cards b { font-size: 17px; line-height: 1.3; align-self: end; }
.mkt__cards span { font-size: 14.5px; color: #fff; opacity: .92; line-height: 1.5; }
@media (min-width: 640px) { .mkt__cards { grid-template-columns: 1fr 1fr; } .mkt__viz { grid-template-columns: 1fr; } }
@media (min-width: 1024px) {
  .mkt__grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 64px; }
  .mkt__viz { padding-left: 24px; }
  .ai-card { transform: rotate(-1.2deg); margin-right: 48px; }
  .chart { margin-left: 64px; margin-top: -28px; transform: rotate(1deg); }
  .mkt__cards { grid-template-columns: repeat(3, 1fr); }
}

/* ===== 04 Cộng đồng ===== */
.pillar--csr { --accent: var(--csr); --accent-ink: var(--csr-ink); background: var(--csr-soft); }
.pillar--csr::before { content: ""; position: absolute; left: -12%; bottom: -30%; width: 55%; aspect-ratio: 1; border-radius: 42% 58% 61% 39% / 47% 39% 61% 53%; background: radial-gradient(circle, rgba(31,164,99,.16), transparent 65%); pointer-events: none; }
.csr__grid { position: relative; display: grid; gap: 48px; align-items: center; }
.csr__collage { position: relative; height: 400px; }
.csr__ph { position: absolute; margin: 0; overflow: hidden; box-shadow: var(--shadow-3); border: 5px solid #fff; }
.csr__ph img { width: 100%; height: 100%; object-fit: cover; }
.csr__ph--a { left: 0; top: 0; width: 74%; height: 62%; border-radius: 28px 96px 28px 28px; }
.csr__ph--b { right: 0; top: 30%; width: 40%; height: 62%; border-radius: 999px 999px 28px 28px; }
.csr__ph--c { left: 8%; bottom: 0; width: 48%; height: 36%; border-radius: 28px; }
.csr__sticker { position: absolute; left: 56%; top: 6%; display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 99px; background: var(--surface); box-shadow: var(--shadow-2); font-weight: 700; font-size: 14px; color: var(--csr-ink); transform: rotate(4deg); }
.csr__list { display: grid; gap: 10px; margin-top: 28px; }
.csr__list a { display: flex; gap: 14px; align-items: center; padding: 14px 16px; border-radius: 16px; background: var(--surface); border: 1px solid rgba(19,122,71,.14); transition: transform .25s var(--ease-out), box-shadow .25s; }
.csr__list a:hover { transform: translateX(4px); box-shadow: var(--shadow-2); }
.csr__list .ph { flex-shrink: 0; width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; font-size: 22px; color: var(--csr-ink); background: var(--csr-soft); }
.csr__list b { display: block; font-size: 16px; line-height: 1.3; }
.csr__list small { display: block; font-size: 13.5px; color: var(--muted); }
.csr__press { margin-top: 28px; padding: 4px 0 4px 18px; border-left: 3px solid var(--csr); }
.csr__press p { font-size: 17px; font-style: italic; font-weight: 500; color: var(--ink-2); }
.csr__press cite { display: block; margin-top: 6px; font-style: normal; font-size: 13.5px; font-weight: 600; color: var(--muted); }
@media (min-width: 640px) { .csr__collage { height: 520px; } }
@media (min-width: 1024px) { .csr__grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 72px; } .csr__collage { height: 600px; } }

/* ===== Vì sao HVSC ===== */
.why { padding-block: var(--section-y); }
.why__grid { display: grid; gap: 36px; }
.why__list { display: grid; counter-reset: why; }
.why__list li { position: relative; display: grid; gap: 6px; padding: 24px 0; border-top: 1px solid var(--line); counter-increment: why; }
.why__list li::after { content: "0" counter(why); position: absolute; right: 0; top: 24px; font-family: var(--mono); font-size: 12.5px; color: var(--muted-2); }
.why__list .ph { font-size: 30px; color: var(--brand); margin-bottom: 6px; }
.why__list b { font-size: 18px; line-height: 1.3; }
.why__list span { color: var(--muted); font-size: 15px; }
@media (min-width: 640px) { .why__list { grid-template-columns: 1fr 1fr; column-gap: 40px; } }
@media (min-width: 1024px) {
  .why__grid { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 72px; align-items: start; }
  .why__head { position: sticky; top: calc(var(--header-h) + 40px); }
}

/* ===== Câu chuyện ===== */
.story { position: relative; padding-block: var(--section-y); color: var(--on-night); background: radial-gradient(60% 80% at 100% 0%, rgba(227,30,36,.28), transparent 60%), linear-gradient(160deg, #1A0B0D 0%, #120D0F 50%, #0F1012 100%); overflow: hidden; }
.story__head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 20px 32px; margin-bottom: 56px; }
.story__head > div, .story__head .kicker { flex-basis: 100%; }
.story__head .h2 { flex: 1 1 420px; }
.timeline { position: relative; display: grid; gap: 28px; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(to bottom, var(--brand), rgba(255,255,255,.2)); transform-origin: top; transform: scaleY(0); transition: transform 1.6s var(--ease-out); }
.timeline.is-in::before { transform: scaleY(1); }
.timeline__item { position: relative; }
.timeline__item::before { content: ""; position: absolute; left: -28px; top: 14px; width: 14px; height: 14px; border-radius: 50%; background: #0F1012; border: 2px solid rgba(255,255,255,.55); }
.timeline__item--key::before { background: var(--brand); border-color: #fff; box-shadow: 0 0 0 6px rgba(227,30,36,.25); }
.timeline__item--now::before { border-color: var(--csr-hi); }
.timeline__year { display: block; font-size: 40px; font-weight: 800; line-height: 1.05; letter-spacing: -.03em; color: #fff; }
.timeline__item--key .timeline__year { background: linear-gradient(90deg, #FF4A50, #FF9A5C); -webkit-background-clip: text; background-clip: text; color: transparent; }

.timeline__item b { display: block; margin-top: 10px; font-size: 17px; color: #fff; }
.timeline__item p { margin-top: 4px; font-size: 14.5px; color: var(--on-night-2); max-width: 40ch; }
.timeline__item { opacity: 0; transform: translateY(16px); transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
.timeline.is-in .timeline__item { opacity: 1; transform: none; }
.timeline.is-in .timeline__item:nth-child(2) { transition-delay: .12s; } .timeline.is-in .timeline__item:nth-child(3) { transition-delay: .24s; } .timeline.is-in .timeline__item:nth-child(4) { transition-delay: .36s; } .timeline.is-in .timeline__item:nth-child(5) { transition-delay: .48s; }
@media (min-width: 1024px) {
  .timeline { grid-template-columns: repeat(5, 1fr); gap: 28px; padding-left: 0; padding-top: 36px; }
  .timeline::before { left: 0; right: 0; top: 6px; bottom: auto; width: auto; height: 2px; transform: scaleX(0); transform-origin: left; background: linear-gradient(90deg, var(--brand), rgba(255,255,255,.2)); }
  .timeline.is-in::before { transform: scaleX(1); }
  .timeline__item::before { left: 0; top: -36px; }
  .timeline__year { font-size: 48px; min-height: 2.2em; display: flex; align-items: flex-end; }

}

/* ===== Báo chí ===== */
.press { padding-block: var(--section-y) 48px; }
.press__list { display: grid; gap: 12px; }
.press__list a { display: grid; gap: 10px; padding: 22px; border-radius: 18px; border: 1px solid var(--line); transition: border-color .25s, box-shadow .25s; }
.press__list a:hover { border-color: var(--ink); box-shadow: var(--shadow-2); }
.press__logo { justify-self: start; display: inline-grid; place-items: center; min-width: 132px; height: 40px; padding: 0 14px; border: 1.5px dashed var(--line-2); border-radius: 10px; font-weight: 800; font-size: 15px; letter-spacing: .06em; color: #2E7D32; }
.press__logo--tn { color: #1F4E8C; }
.press__list b { font-size: 17px; line-height: 1.4; }
.press__list small { font-size: 13.5px; color: var(--muted); font-weight: 600; }
@media (min-width: 900px) { .press__list { grid-template-columns: repeat(3, 1fr); } }

/* ===== Tin tức ===== */
.news { padding-block: 48px var(--section-y); }
.news__grid { display: grid; gap: 16px; }
.post { display: grid; grid-template-columns: 120px 1fr; gap: 14px; align-items: center; padding: 10px; border-radius: 18px; background: var(--surface); border: 1px solid var(--line); transition: box-shadow .25s, transform .25s var(--ease-out); }
.post:hover { box-shadow: var(--shadow-2); transform: translateY(-2px); }
.post__img { display: block; border-radius: 12px; overflow: hidden; aspect-ratio: 4 / 3; background: var(--bg-soft); }
.post__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease-out); }
.post:hover .post__img img { transform: scale(1.05); }
.post__body { display: grid; gap: 6px; justify-items: start; min-width: 0; padding-right: 6px; }
.post__body b { font-size: 15.5px; line-height: 1.4; }
.post__body small { font-size: 13px; color: var(--muted); }
.post--lead { grid-template-columns: 1fr; padding: 12px; }
.post--lead .post__img { aspect-ratio: 16 / 10; }
.post--lead .post__body { padding: 6px 8px 8px; }
.post--lead .post__body b { font-size: 20px; line-height: 1.35; }
@media (min-width: 900px) {
  .news__grid { grid-template-columns: 1.25fr 1fr; grid-template-rows: repeat(3, auto); }
  .post--lead { grid-row: 1 / 4; }
  .post { grid-template-columns: 168px 1fr; }
  .post--lead { grid-template-columns: 1fr; }
  .post--lead .post__body b { font-size: 24px; }
}

/* ===== Video ngắn ===== */
.reels { padding-block: var(--section-y); background: var(--bg-soft); }
.reels__track { display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; padding: 4px max(var(--gutter), calc((100vw - var(--container)) / 2)) 12px; scroll-padding-inline: max(var(--gutter), calc((100vw - var(--container)) / 2)); }
.reels__track::-webkit-scrollbar { display: none; }
.reel { position: relative; flex: 0 0 auto; width: 200px; aspect-ratio: 9 / 16; border-radius: 20px; overflow: hidden; scroll-snap-align: start; background: var(--night); box-shadow: var(--shadow-2); }
.reel img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease-out); }
.reel:hover img { transform: scale(1.05); }
.reel::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(15,16,18,.9) 0%, rgba(15,16,18,.15) 52%, transparent 70%); }
.reel__play { position: absolute; z-index: 1; top: 12px; right: 12px; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; background: rgba(255,255,255,.2); backdrop-filter: blur(8px); color: #fff; font-size: 16px; border: 1px solid rgba(255,255,255,.35); transition: background .25s, transform .25s; }
.reel:hover .reel__play { background: var(--brand); transform: scale(1.08); border-color: var(--brand); }
.reel__cap { position: absolute; z-index: 1; left: 14px; right: 14px; bottom: 14px; color: #fff; }
.reel__cap b { display: block; font-size: 15px; line-height: 1.35; }
.reel__cap small { display: inline-block; margin-top: 6px; font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 6px; background: rgba(255,255,255,.18); }
@media (min-width: 900px) { .reel { width: 236px; } }

/* ===== Đánh giá ===== */
.reviews { padding-block: var(--section-y) 64px; }
.reviews__viewport { margin-inline: calc(var(--gutter) * -1); }
.reviews__track { display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; padding: 4px var(--gutter) 12px; scroll-padding-inline: var(--gutter); }
.reviews__track::-webkit-scrollbar { display: none; }
.review { flex: 0 0 86%; scroll-snap-align: start; display: flex; flex-direction: column; gap: 16px; padding: 24px; border-radius: 20px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1); }
.review__stars { display: flex; gap: 2px; color: #E7A11A; font-size: 17px; }
.review p { font-size: 16.5px; line-height: 1.6; color: var(--ink-2); flex: 1; }
.review__who { display: flex; gap: 12px; align-items: center; }
.avatar { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; font-size: 14px; color: #fff; background: color-mix(in srgb, var(--accent) 68%, #000); flex-shrink: 0; }
.review__who b { display: block; font-size: 15px; }
.review__who small { display: block; font-size: 13px; color: var(--muted); }
.reviews__note { margin-top: 14px; font-size: 13px; color: var(--muted); display: flex; gap: 6px; align-items: center; }
@media (min-width: 640px) { .review { flex-basis: 360px; } }
@media (min-width: 1024px) { .review { flex-basis: calc((100% - 32px) / 3); } .reviews__viewport { margin-inline: 0; } .reviews__track { padding-inline: 0; scroll-padding-inline: 0; } }

/* ===== FAQ ===== */
.faq { padding-block: 32px var(--section-y); }
.faq__grid { display: grid; gap: 32px; }
.contact-card { margin-top: 24px; display: grid; gap: 10px; padding: 22px; border-radius: 20px; background: var(--bg-soft); max-width: 380px; }
.contact-card p { font-size: 15px; color: var(--ink-2); margin-bottom: 4px; }
.qa { border-bottom: 1px solid var(--line); }
.qa:first-child { border-top: 1px solid var(--line); }
.qa summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 0; font-size: 17px; font-weight: 700; cursor: pointer; line-height: 1.4; }
.qa summary::-webkit-details-marker { display: none; }
.qa__pm { position: relative; width: 32px; height: 32px; flex-shrink: 0; border-radius: 50%; border: 1px solid var(--line-2); transition: background .25s, border-color .25s; }
.qa__pm::before, .qa__pm::after { content: ""; position: absolute; left: 50%; top: 50%; width: 12px; height: 2px; border-radius: 2px; background: var(--ink); transform: translate(-50%, -50%); transition: transform .3s var(--ease-out), background .25s; }
.qa__pm::after { transform: translate(-50%, -50%) rotate(90deg); }
.qa[open] .qa__pm { background: var(--ink); border-color: var(--ink); }
.qa[open] .qa__pm::before, .qa[open] .qa__pm::after { background: var(--surface); }
.qa[open] .qa__pm::after { transform: translate(-50%, -50%) rotate(0deg); }
.qa summary:hover .qa__pm { border-color: var(--ink); }
.qa__a { padding: 0 48px 22px 0; }
.qa__a p { color: var(--muted); font-size: 16px; max-width: 68ch; }
.qa__a a { color: var(--brand-ink); font-weight: 600; text-decoration: underline; }
@media (min-width: 1024px) { .faq__grid { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 72px; } }

/* ===== CTA ===== */
.cta { position: relative; padding-block: 80px; background: var(--brand-600); color: #fff; overflow: hidden; }
.cta::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .14;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='64' height='56'%3E%3Cpath d='M0 56 L32 0 L64 56 Z' fill='none' stroke='white' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 64px 56px; mask-image: radial-gradient(ellipse 60% 90% at 100% 50%, #000, transparent 70%); -webkit-mask-image: radial-gradient(ellipse 60% 90% at 100% 50%, #000, transparent 70%); }
.cta .container { position: relative; }
.cta__title { font-size: var(--fs-h2); font-weight: 800; letter-spacing: -.025em; line-height: var(--lh-tight); }
.cta__grid { display: grid; gap: 12px; margin-top: 28px; }
.cta__opt { display: grid; grid-template-columns: auto 1fr; gap: 0 14px; align-items: center; padding: 18px 20px; border-radius: 18px; background: var(--surface); color: var(--ink); transition: transform .25s var(--ease-out), box-shadow .25s; }
.cta__opt:hover { transform: translateY(-3px); box-shadow: 0 20px 40px -18px rgba(60,0,0,.6); }
.cta__opt .ph { grid-row: 1 / 3; font-size: 26px; width: 50px; height: 50px; border-radius: 14px; display: grid; place-items: center; color: var(--brand-600); background: var(--brand-50); }
.cta__opt b { font-size: 17px; line-height: 1.3; }
.cta__opt span { font-size: 14px; color: var(--muted); }
.cta__fine { margin-top: 20px; font-size: 15px; }
.cta__fine a { color: #fff; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
@media (min-width: 900px) { .cta__grid { grid-template-columns: repeat(3, 1fr); } }

/* ===== Mobile: thu gọn lưới 3 thẻ + Xem thêm (+/−) ===== */
.more-btn { display: none; }
@media (max-width: 639px) {
  .js [data-collapse]:not(.is-expanded) > :nth-child(n+4) { display: none; }
  .more-btn { display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%; min-height: 46px; margin-top: 12px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--surface); font-weight: 700; font-size: 15px; color: var(--ink); }
  .more-btn .ph { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; font-size: 13px; background: var(--ink); color: var(--on-ink); }
  .pillar--tech .more-btn, .pillar--mkt .more-btn { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.28); color: #fff; }
  .pillar--tech .more-btn .ph, .pillar--mkt .more-btn .ph { background: var(--surface); color: var(--ink); }
  .sec-head { flex-wrap: wrap; align-items: flex-end; margin-bottom: 24px; }
  .csr__collage { height: 330px; }
  .air__row { margin-top: 28px; }
  .tool-card { min-height: 160px; }
  .mkt__cards { margin-top: 36px; }
  .products { margin-top: 32px; }
  .story__head { margin-bottom: 36px; }
  .timeline { gap: 22px; }
  .timeline__year { font-size: 32px; }
}

/* Báo chí: hàng cuộn ngang có mũi tên trên mobile/tablet */
.sec-head__ctrl--mobile { display: flex; }
.press__more { margin-top: 18px; }
@media (max-width: 899px) {
  .press__list { display: flex; gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; margin-inline: calc(var(--gutter) * -1); padding: 2px var(--gutter) 8px; scroll-padding-inline: var(--gutter); }
  .press__list::-webkit-scrollbar { display: none; }
  .press__list li { flex: 0 0 min(82%, 340px); scroll-snap-align: start; }
  .press__list a { height: 100%; }
}
@media (min-width: 900px) { .sec-head__ctrl--mobile { display: none; } }

/* Ảnh bìa minh hoạ không dùng ảnh chụp */
.post__img--art { display: grid; place-items: center; background: linear-gradient(135deg, #5B21B6, #B0175E 55%, #C2410C); color: rgba(255,255,255,.9); font-size: 40px; }

/* Footer cột link: accordion +/− trên mobile */
.fcol summary { list-style: none; font-weight: 700; color: var(--ftr-strong, #fff); margin-bottom: 12px; display: flex; align-items: center; justify-content: space-between; }
.fcol summary::-webkit-details-marker { display: none; }
.fcol__pm { display: none; position: relative; width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--ftr-line2, rgba(255,255,255,.3)); }
.fcol__pm::before, .fcol__pm::after { content: ""; position: absolute; left: 50%; top: 50%; width: 10px; height: 2px; border-radius: 2px; background: var(--ftr-strong, #fff); transform: translate(-50%, -50%); }
.fcol__pm::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .3s var(--ease-out); }
.fcol[open] .fcol__pm::after { transform: translate(-50%, -50%) rotate(0deg); }
.fcol ul { display: grid; gap: 8px; }
@media (min-width: 900px) { .fcol summary { pointer-events: none; } }
@media (max-width: 899px) {
  .site-footer__cols { grid-template-columns: 1fr; gap: 0; }
  .fcol { border-bottom: 1px solid var(--ftr-line, rgba(255,255,255,.1)); }
  .fcol summary { margin: 0; padding: 14px 0; cursor: pointer; }
  .fcol ul { padding-bottom: 14px; }
  .fcol__pm { display: block; }
}
.round-btn--dark { background: transparent; color: #fff; border-color: rgba(255,255,255,.3); }
.round-btn--dark:hover { background: var(--surface); color: var(--ink); border-color: #fff; }
.story__ctrl { display: none; }

/* ===== Mobile gọn (≤639px): mục tiêu trang ~9.000px ===== */
@media (max-width: 639px) {

  .air__grid { gap: 24px; }
  .air__photo { aspect-ratio: 16 / 10; }
  .air__notice { padding: 10px 12px; }
  .air__copy .lead { margin-bottom: 20px; }
  .tool-card { display: none; }
  .vdh-banner { padding: 16px; gap: 12px; }
  .vdh-banner__txt { font-size: 14px; }

  .tech__head { gap: 24px; margin-bottom: 24px; }
  .codewin__foot { display: none; }
  .codewin__code { font-size: 11.5px; padding: 14px 16px; line-height: 1.7; }
  .bento__item a { grid-template-columns: auto 1fr; gap: 2px 14px; padding: 16px; }
  .bento code { display: none; }
  .bento__ico { grid-row: 1 / 3; margin: 2px 0 0; font-size: 26px; }
  .bento b { font-size: 16.5px; }
  .bento span { font-size: 14px; }
  .products__list a { padding: 11px 14px; }

  .chart { display: none; }
  .ai-card { padding: 14px; }
  .mkt__cards a { padding: 14px 16px; }
  .mkt__cards .ph { width: 40px; height: 40px; font-size: 22px; }

  .csr__grid { gap: 24px; }
  .csr__collage { height: auto; }
  .csr__ph--a { position: relative; width: 100%; height: auto; aspect-ratio: 16 / 10; border-radius: 24px 72px 24px 24px; }
  .csr__ph--b, .csr__ph--c, .csr__sticker { display: none; }
  .csr__list { margin-top: 20px; }
  .csr__press { margin-top: 20px; }

  .why__list li { grid-template-columns: auto 1fr; gap: 2px 14px; padding: 18px 0; }
  .why__list .ph { grid-row: 1 / 3; margin: 0; font-size: 26px; }
  .why__list li::after { display: none; }
  .why__grid { gap: 20px; }

  .story__ctrl { display: flex; }
  .story__head .h2 { flex-basis: 100%; }
  .timeline { display: flex; gap: 14px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; padding: 32px var(--gutter) 6px; margin-inline: calc(var(--gutter) * -1); scroll-padding-inline: var(--gutter); }
  .timeline::-webkit-scrollbar { display: none; }
  .timeline::before { left: var(--gutter); right: auto; top: 6px; bottom: auto; width: 1000px; height: 2px; transform: scaleX(0); transform-origin: left; background: linear-gradient(90deg, var(--brand), rgba(255,255,255,.2)); }
  .timeline.is-in::before { transform: scaleX(1); }
  .timeline__item { flex: 0 0 72%; scroll-snap-align: start; }
  .timeline__item::before { left: 0; top: -32px; }

  .post--lead .post__img { aspect-ratio: 16 / 9; }
  .post { grid-template-columns: 104px 1fr; }
  .post__body b { font-size: 15px; }

  .contact-card { display: none; }
  .faq__grid { gap: 16px; }
  .qa summary { font-size: 16px; padding: 16px 0; }

  .cta { padding-block: 56px; }
  .cta__opt { padding: 14px 16px; }
  .cta__opt .ph { width: 42px; height: 42px; font-size: 22px; }
  .site-footer { padding-top: 48px; }
  .site-footer__top { gap: 28px; padding-bottom: 28px; }
}

/* Hàng cuộn ngang có mũi tên chỉ trên mobile */
.m-rail-ctrl { display: none; gap: 8px; }
.products__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.products__head .products__title { margin: 0; }
@media (max-width: 639px) {
  .m-rail-ctrl { display: flex; }
  .why__head .m-rail-ctrl { margin-top: 18px; }
  .m-rail { display: flex !important; gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; margin-inline: calc(var(--gutter) * -1); padding: 2px var(--gutter) 8px; scroll-padding-inline: var(--gutter); }
  .m-rail::-webkit-scrollbar { display: none; }
  .m-rail > * { flex: 0 0 80%; scroll-snap-align: start; }
  .why__list.m-rail > li { border: 1px solid var(--line); border-radius: 16px; padding: 18px; background: var(--bg-soft); grid-template-columns: 1fr; }
  .why__list.m-rail .ph { grid-row: auto; }
  .news__grid.m-rail > .post { grid-template-columns: 1fr; padding: 10px; align-content: start; }
  .news__grid.m-rail .post__img { aspect-ratio: 16 / 10; }
  .news__grid.m-rail .post--lead .post__body b, .news__grid.m-rail .post__body b { font-size: 15.5px; }
  .products__list.m-rail > li { flex-basis: 64%; }
  .products__list.m-rail a { height: 100%; }
  .press { display: none; }
  .codewin { display: none; }
  .tech__head { margin-bottom: 20px; }
  .reel { width: 172px; }

  .site-footer__about { display: none; }
}
.bento__ctrl, .mkt__ctrl, .csr__ctrl { justify-content: flex-end; margin-bottom: 12px; }
@media (max-width: 639px) {
  .bento.m-rail > li, .mkt__cards.m-rail > li { flex-basis: 82%; }
  .bento.m-rail > li > a, .mkt__cards.m-rail > li > a { height: 100%; }
  .mkt__cards { margin-top: 28px; }
  .mkt__ctrl { margin-top: 28px; }
  .mkt__ctrl + .mkt__cards { margin-top: 0; }
  .pillar--mkt .mkt__copy .btn { display: none; }
  .csr__list.m-rail > li { flex-basis: 84%; }
  .csr__list.m-rail a { height: 100%; }
  .csr__ctrl { margin-top: 20px; }
  .csr__ctrl + .csr__list { margin-top: 0; }
  .air__photo { aspect-ratio: 2 / 1; }
  .csr__ph--a { aspect-ratio: 2 / 1; }
  .vdh-banner__txt { display: none; }
  .vdh-banner { grid-template-columns: 1fr auto; }
  .vdh-banner .btn { justify-self: end; }
  .graph { height: 370px; }
}
.csr__grid > *, .air__grid > *, .mkt__grid > *, .tech__head > *, .why__grid > *, .faq__grid > * { min-width: 0; }
@media (max-width: 639px) {
  .vdh-banner { grid-template-columns: 1fr; }
  .vdh-banner .btn { justify-self: start; }
  .vdh-banner__logo small { white-space: normal; }
}
@media (min-width: 640px) and (max-width: 1023px) { .bento__item:last-child { grid-column: 1 / -1; } }

/* 11/10: 7 thẻ Marketing digital – thẻ AI trong Marketing rộng gấp đôi, đủ hàng */
@media (min-width: 640px) { .mkt__cards > li.mkt__card--ai { grid-column: span 2; } }
@media (min-width: 1024px) { .mkt__cards { grid-template-columns: repeat(4, 1fr); } }

/* review1: mockup web mẫu thay khung code */
.webmock { padding: 14px 14px 10px; position: relative; }
.webmock svg { display: block; width: 100%; height: auto; }
.webmock__tag { position: absolute; right: 18px; top: 8px; margin: 0; padding: 2px 9px; font-size: 11.5px; border-radius: 99px; background: rgba(255,255,255,.1); color: var(--on-night-2); }

/* ===== review1: khối Tin tức — ảnh 16:9 không cắt chữ, thẻ ngang, meta ngày + phút đọc, trạng thái rỗng ===== */
.news__grid { gap: 18px; }
.post { grid-template-columns: minmax(120px, 42%) 1fr; padding: 12px; align-items: start; }
.post__img { aspect-ratio: 16 / 9; border-radius: 10px; }
.post__img--fb { background: linear-gradient(135deg, #1B1F2E, #3A2B5E 60%, #E31E24); }
.post[data-group="air"] .post__img--fb { background: linear-gradient(135deg, #3b1d0e, #b4531e); }
.post[data-group="tech"] .post__img--fb { background: linear-gradient(135deg, #12142b, #4f54d6); }
.post[data-group="mkt"] .post__img--fb { background: linear-gradient(135deg, #3a0f2a, #c2185b); }
.post[data-group="csr"] .post__img--fb { background: linear-gradient(135deg, #0c2e20, #1fa463); }
.post__body { align-content: start; gap: 7px; }
.post__body b { font-size: 15.5px; line-height: 1.38; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post__meta { display: inline-flex; gap: 6px; align-items: center; font-size: 12.5px; color: var(--muted); }
.post--lead { grid-template-columns: 1fr; padding: 14px; }
.post--lead .post__img { aspect-ratio: 16 / 9; border-radius: 12px; }
.post--lead .post__body b { font-size: clamp(19px, .9vw + 14px, 24px); -webkit-line-clamp: 3; }
.post--lead .post__body small { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; font-size: 14.5px; line-height: 1.5; }
@media (min-width: 900px) {
  .news__grid { grid-template-columns: 7fr 5fr; grid-template-rows: none; grid-auto-rows: auto; align-items: stretch; }
  .post--lead { grid-row: 1 / span 4; grid-template-columns: 1fr; }
  .news__grid[data-n="1"] { grid-template-columns: minmax(0, 760px); }
  .news__grid[data-n="2"] .post:not(.post--lead) { align-self: start; }
  .post { grid-template-columns: 176px 1fr; }
  .news__grid > .post.post--lead { grid-template-columns: 1fr; }
}
@media (min-width: 761px) and (max-width: 899px) {
  .news__grid { grid-template-columns: 1fr 1fr; }
  .news__grid > .post--lead { grid-column: 1 / -1; grid-row: auto; }
  .news__grid > .post:not(.post--lead) { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .news__grid.m-rail > .post { grid-template-columns: 1fr; flex: 0 0 min(82vw, 330px); }
  .news__grid.m-rail .post__img { aspect-ratio: 16 / 9; }
  .news__grid.m-rail .post--lead .post__body b, .news__grid.m-rail .post__body b { font-size: 16px; }
}
.news__empty { display: grid; justify-items: center; gap: 8px; text-align: center; padding: 48px 20px; border: 1px dashed var(--line); border-radius: 20px; background: var(--bg-soft); }
.news__empty svg { width: 40px; height: 40px; color: #E31E24; }
.news__empty p { max-width: 46ch; color: var(--muted); font-size: 14.5px; }