/*
 * Trang ban ScrollStop — nhan dien DT Labs (CLAUDE.md 1b): xanh #2563EB -> #0EA5E9, chu #0F172A,
 * chu phu #64748B, nen trang, Inter. Chi nen sang: anh chup app va anh slide deu chon cho nen sang.
 * Tinh cach cua trang den tu chinh cac slide that; phan con lai giu yen.
 */
:root {
  --blue: #2563EB;
  --sky: #0EA5E9;
  --ink: #0F172A;
  --ink-2: #334155;
  --muted: #64748B;
  --line: #E2E8F0;
  --mist: #F3F6FB;
  --paper: #FFFFFF;
  --tint: #EFF5FF;
  --ok: #15803D;
  --ok-bg: #ECFDF3;
  --no: #B42318;
  --no-bg: #FEF3F2;
  --grad: linear-gradient(135deg, #2563EB 0%, #0EA5E9 100%);
  --r: 14px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 12px 32px -12px rgba(15, 23, 42, .18);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body.ss {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 17px/1.65 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
.ss img { max-width: 100%; height: auto; display: block; }
.ss a { color: var(--blue); text-underline-offset: 3px; }
.ss a:focus-visible, .ss button:focus-visible, .ss summary:focus-visible { outline: 3px solid rgba(37, 99, 235, .45); outline-offset: 3px; border-radius: 6px; }
.ss h1, .ss h2, .ss h3 { color: var(--ink); text-wrap: balance; margin: 0; letter-spacing: -.02em; }
.ss h1 { font-size: clamp(2.2rem, 5.2vw, 3.6rem); line-height: 1.05; font-weight: 800; }
.ss h2 { font-size: clamp(1.6rem, 3.4vw, 2.35rem); line-height: 1.15; font-weight: 800; }
.ss h3 { font-size: 1.15rem; line-height: 1.3; font-weight: 700; letter-spacing: -.01em; }
.ss p { margin: 0; }
.ss ul { margin: 0; padding: 0; list-style: none; }
.ss figure { margin: 0; }

.ss-wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.ss-narrow { max-width: 760px; }
.ss-sec { padding: 88px 0; }
.ss-sec.tight { padding: 64px 0; }
.ss-band { background: var(--mist); }
.ss-dark { background: var(--ink); color: #CBD5E1; }
.ss-dark h2, .ss-dark h3 { color: #fff; }
.ss-stack { display: flex; flex-direction: column; gap: 18px; }
.ss-kicker { font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--blue); }
.ss-lede { font-size: 1.2rem; line-height: 1.55; color: var(--ink-2); max-width: 62ch; }
.ss-sub { color: var(--muted); max-width: 64ch; }
.ss-center { text-align: center; }
.ss-center .ss-lede, .ss-center .ss-sub { margin-left: auto; margin-right: auto; }
.ss-hl { background: linear-gradient(transparent 62%, rgba(14, 165, 233, .28) 62%); }

/* ------------------------------------------------------------------ nav */
.ss-nav { position: sticky; top: 0; z-index: 20; background: rgba(255, 255, 255, .9); backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.ss-nav-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; }
.ss-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--ink) !important; text-decoration: none; font-size: 1.05rem; }
.ss-brand small { font-weight: 500; color: var(--muted); font-size: .8rem; margin-left: 2px; }
.ss-mark { width: 32px; height: 32px; border-radius: 8px; background: var(--grad); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 1rem; }
.ss-nav nav { display: flex; align-items: center; gap: 18px; font-size: .95rem; }
.ss-nav nav a:not(.ss-btn) { color: var(--ink-2); text-decoration: none; font-weight: 500; }
.ss-nav nav > * { white-space: nowrap; }
@media (max-width: 560px) { .ss-brand small { display: none; } .ss-nav nav { gap: 12px; font-size: .88rem; } .ss-nav nav a[href^="mailto"] { display: none; } }

/* ------------------------------------------------------------------ knopf */
.ss-btn, .ss .sales-buy {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 54px; padding: 0 30px; border-radius: 12px; border: 0;
  background: var(--grad); color: #fff !important; font: 700 1.05rem/1.2 Inter, system-ui, sans-serif;
  text-decoration: none; cursor: pointer; box-shadow: 0 10px 24px -10px rgba(37, 99, 235, .7);
  transition: transform .15s ease, box-shadow .15s ease;
}
.ss-btn:hover { transform: translateY(-1px); box-shadow: 0 14px 28px -10px rgba(37, 99, 235, .8); }
.ss-btn-sm { min-height: 40px; padding: 0 16px; font-size: .9rem; border-radius: 10px; box-shadow: none; }
.ss-btn-block { width: 100%; }
.ss .is-waiting { opacity: .55; cursor: not-allowed; box-shadow: none; transform: none; }
.ss .sales-no, .ss-no { display: inline-block; color: var(--muted) !important; font-size: .95rem; text-decoration: underline; text-underline-offset: 3px; }
.ss .sales-no.is-waiting { opacity: 1; }
.ss .sales-preview-skip { display: block; margin-top: 6px; font-size: .8rem; color: var(--muted); }
.ss-cta { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.ss-center .ss-cta { align-items: center; }
.ss-under { font-size: .88rem; color: var(--muted); }
@media (prefers-reduced-motion: reduce) { .ss-btn { transition: none; } .ss-btn:hover { transform: none; } }

/* ------------------------------------------------------------------ hero */
.ss-hero { padding: 72px 0 0; background:
  radial-gradient(900px 420px at 80% -10%, rgba(14, 165, 233, .14), transparent 70%),
  radial-gradient(700px 380px at 0% 0%, rgba(37, 99, 235, .10), transparent 70%); }
.ss-hero .ss-stack { gap: 22px; }
.ss-hero h1 { max-width: 15ch; }
.ss-hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .ss-hero-grid { grid-template-columns: 1fr; gap: 36px; } }
.ss-fan { position: relative; height: 470px; }
.ss-fan img { position: absolute; width: 58%; border-radius: 14px; box-shadow: 0 30px 60px -20px rgba(15, 23, 42, .45); aspect-ratio: 4 / 5; object-fit: cover; }
.ss-fan img:nth-child(1) { left: 0; top: 60px; transform: rotate(-8deg); }
.ss-fan img:nth-child(2) { left: 21%; top: 10px; transform: rotate(-1deg); z-index: 2; }
.ss-fan img:nth-child(3) { left: 42%; top: 64px; transform: rotate(7deg); z-index: 3; }
@media (max-width: 900px) { .ss-fan { height: 360px; max-width: 460px; margin: 0 auto; width: 100%; } }
@media (max-width: 420px) { .ss-fan { height: 300px; } }

.ss .ss-frame { margin: 64px 0 0; border-radius: 16px 16px 0 0; overflow: hidden; border: 1px solid var(--line); border-bottom: 0; box-shadow: 0 -8px 40px -20px rgba(15, 23, 42, .35); background: #fff; }
.ss .ss-frame.whole { border-radius: 16px; border-bottom: 1px solid var(--line); margin-top: 0; box-shadow: var(--shadow); }
.ss-frame-bar { height: 34px; display: flex; align-items: center; gap: 7px; padding: 0 14px; background: #F1F5F9; border-bottom: 1px solid var(--line); }
.ss-frame-bar i { width: 10px; height: 10px; border-radius: 50%; background: #CBD5E1; }
.ss-frame-bar span { margin-left: 10px; font-size: .74rem; color: var(--muted); }
.ss-caption { font-size: .82rem; color: var(--muted); margin-top: 12px; }

/* ------------------------------------------------------------------ luoi */
.ss-grid { display: grid; gap: 18px; }
.ss-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ss-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 860px) { .ss-grid.three { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .ss-grid.two, .ss-grid.three { grid-template-columns: 1fr; } }
.ss-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 24px; display: flex; flex-direction: column; gap: 8px; }
.ss-card p { color: var(--ink-2); font-size: .98rem; }
.ss-card .ss-note { color: var(--muted); font-size: .88rem; }
.ss-split { display: grid; grid-template-columns: 1fr 1.25fr; gap: 48px; align-items: center; }
.ss-split.rev { grid-template-columns: 1.25fr 1fr; }
@media (max-width: 900px) { .ss-split, .ss-split.rev { grid-template-columns: 1fr; gap: 28px; } .ss-split.rev > :first-child { order: 2; } }

/* ------------------------------------------------------------------ mau slide */
.ss-tpls { display: grid; grid-template-columns: repeat(auto-fill, minmax(176px, 1fr)); gap: 22px 16px; }
@media (max-width: 520px) { .ss-tpls { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 12px; } .ss-tpl span:not(.ss-tag) { display: none; } }
.ss-tpl figure { margin: 0; }
.ss-tpl img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 10px; box-shadow: 0 10px 24px -14px rgba(15, 23, 42, .5); }
.ss-tpl figcaption { margin-top: 10px; display: flex; flex-direction: column; gap: 4px; }
.ss-tpl b { font-size: .95rem; }
.ss-tpl span { font-size: .84rem; color: var(--muted); line-height: 1.45; }
.ss-tag { align-self: flex-start; font-size: .72rem; font-weight: 700; letter-spacing: .04em; padding: 3px 8px; border-radius: 999px; background: var(--tint); color: var(--blue); }
.ss-tag.plain { background: #F1F5F9; color: var(--ink-2); }
.ss-tag.ok { background: var(--ok-bg); color: var(--ok); }

/* ------------------------------------------------------------------ buoc */
.ss-steps { counter-reset: s; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
@media (max-width: 900px) { .ss-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .ss-steps { grid-template-columns: 1fr; } }
.ss-steps li { counter-increment: s; background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 22px; display: flex; flex-direction: column; gap: 8px; }
.ss-steps li::before { content: counter(s); width: 34px; height: 34px; border-radius: 10px; background: var(--grad); color: #fff; font-weight: 800; display: grid; place-items: center; }
.ss-steps p { color: var(--ink-2); font-size: .96rem; }

/* ------------------------------------------------------------------ danh sach */
.ss-ticks li, .ss-cross li { position: relative; padding-left: 30px; margin: 10px 0; color: var(--ink-2); }
.ss-ticks li::before, .ss-cross li::before { position: absolute; left: 0; top: .2em; width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; font-size: .75rem; font-weight: 800; }
.ss-ticks li::before { content: "✓"; background: var(--ok-bg); color: var(--ok); }
.ss-cross li::before { content: "✕"; background: var(--no-bg); color: var(--no); }
.ss-fit { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 700px) { .ss-fit { grid-template-columns: 1fr; } }
.ss-fit .ss-card { padding: 26px 28px; }
.ss-rule { margin-top: 20px; padding: 16px 20px; border-radius: 12px; background: var(--tint); color: var(--ink); font-weight: 600; }

/* ------------------------------------------------------------------ bang chi phi */
.ss-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); background: #fff; }
.ss-table { width: 100%; border-collapse: collapse; font-size: .95rem; min-width: 560px; }
.ss-table th, .ss-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.ss-table thead th { font-size: .78rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); font-weight: 700; background: #F8FAFC; }
.ss-table tbody tr:last-child td, .ss-table tbody tr:last-child th { border-bottom: 0; }
.ss-table td.num { font-variant-numeric: tabular-nums; white-space: nowrap; font-weight: 600; }
.ss-table th[scope=row] { font-weight: 700; }
.ss-table td:last-child { min-width: 280px; }

/* ------------------------------------------------------------------ hop gia */
.ss-price { display: grid; grid-template-columns: 1.15fr 1fr; gap: 0; border-radius: 20px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: #fff; }
@media (max-width: 860px) { .ss-price { grid-template-columns: 1fr; } }
.ss-price-list { padding: 36px; }
.ss-price-buy { padding: 36px; background: var(--ink); color: #CBD5E1; display: flex; flex-direction: column; gap: 16px; justify-content: center; }
.ss-price-buy h3 { color: #fff; font-size: 1.05rem; }
.ss-amount { color: #fff; font-size: 4rem; font-weight: 800; letter-spacing: -.03em; line-height: 1; font-variant-numeric: tabular-nums; }
.ss-amount small { font-size: 1rem; font-weight: 500; color: #94A3B8; letter-spacing: 0; margin-left: 8px; }
.ss-price-buy .ss-under { color: #94A3B8; }
.ss-price-buy .sales-no, .ss-price-buy .ss-no { color: #CBD5E1 !important; }
.ss-price-list .ss-ticks li { font-size: .97rem; }
.ss-callout { border-left: 4px solid var(--sky); background: #F0F9FF; padding: 18px 22px; border-radius: 0 12px 12px 0; color: var(--ink-2); font-size: .96rem; }
.ss-callout b { color: var(--ink); }

/* ------------------------------------------------------------------ banner + faq */
.ss-banner { background: var(--ok-bg); color: var(--ok); text-align: center; font-weight: 600; font-size: .95rem; padding: 12px 20px; border-bottom: 1px solid #C6F0D5; }
.ss-step { display: inline-flex; gap: 8px; align-items: center; font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.ss-step b { color: var(--blue); }
.ss-faq { display: flex; flex-direction: column; gap: 10px; }
.ss-faq details { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 0 22px; }
.ss-faq summary { cursor: pointer; list-style: none; padding: 18px 28px 18px 0; font-weight: 700; position: relative; }
.ss-faq summary::-webkit-details-marker { display: none; }
.ss-faq summary::after { content: "+"; position: absolute; right: 0; top: 14px; font-size: 1.4rem; font-weight: 500; color: var(--muted); }
.ss-faq details[open] summary::after { content: "–"; }
.ss-faq details > div { padding: 0 0 20px; color: var(--ink-2); display: flex; flex-direction: column; gap: 10px; font-size: .98rem; }

/* ------------------------------------------------------------------ jv */
.ss-facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 860px) { .ss-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.ss-fact { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 20px; }
.ss-fact .k { font-size: .76rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); font-weight: 700; }
.ss-fact .v { font-size: 1.6rem; font-weight: 800; letter-spacing: -.02em; margin-top: 6px; font-variant-numeric: tabular-nums; }
.ss-fact .v small { font-size: .85rem; color: var(--muted); font-weight: 500; letter-spacing: 0; }
.ss-swipe { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 22px 24px; }
.ss-swipe pre { white-space: pre-wrap; font: 400 .95rem/1.6 Inter, system-ui, sans-serif; color: var(--ink-2); margin: 10px 0 0; }

/* ------------------------------------------------------------------ chan trang */
.ss-footer { border-top: 1px solid var(--line); background: #F8FAFC; padding: 40px 0 48px; }
.ss .ss-fine { font-size: .78rem; color: var(--muted); line-height: 1.6; max-width: 90ch; margin: 0 auto 12px; text-align: center; }
.ss .wplus_spdisclaimer { font-size: .78rem; color: var(--muted); max-width: 90ch; margin: 0 auto 12px; text-align: center; }
.ss .dt-footer { margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--line); text-align: center; font-size: .8rem; color: var(--muted); display: flex; flex-direction: column; gap: 8px; }
.ss .dt-footer a { color: var(--ink-2); }
.ss .dt-footer-fb { margin-left: 4px; }

/* truoc gio mo ban: moc gio that, khong dem nguoc */
.ss-opens { display: inline-block; margin-top: 4px; padding: 8px 14px; border-radius: 10px; background: var(--tint); color: var(--blue); font-weight: 600; font-size: .92rem; }
.ss-opens.dark { background: rgba(14, 165, 233, .15); color: #7DD3FC; margin: 0; }

/* ------------------------------------------------------------------ DT Labs Membership */
.mem-shelf { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.mem-shelf img { width: 100%; aspect-ratio: 5 / 3; object-fit: cover; border-radius: 12px; box-shadow: var(--shadow); }
.mem-shelf img:first-child { grid-column: 1 / -1; }
.mem-next { aspect-ratio: 5 / 3; border-radius: 12px; border: 2px dashed #93C5FD; background: var(--tint); display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 2px; color: var(--blue); }
.mem-next span { font-size: .75rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.mem-next b { font-size: 1.05rem; color: var(--ink); }
.mem-app img { width: 100%; aspect-ratio: 5 / 3; object-fit: cover; border-radius: 10px; margin-bottom: 6px; }
.mem-app h3 { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.mem-soon { border-style: dashed; border-color: #93C5FD; background: var(--tint); justify-content: center; }
.mem-plans { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; max-width: 860px; margin-left: auto; margin-right: auto; width: 100%; }
@media (max-width: 700px) { .mem-plans { grid-template-columns: 1fr; } }
.mem-plan { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 28px; display: flex; flex-direction: column; gap: 12px; box-shadow: var(--shadow); }
.mem-plan .ss-amount { color: var(--ink); }
.mem-plan .ss-amount small { color: var(--muted); }
.mem-plan p { color: var(--ink-2); font-size: .95rem; }
.mem-plan.best { border: 2px solid var(--blue); }
.mem-shelf img:first-child + .mem-next:last-child { grid-column: 1 / -1; aspect-ratio: auto; padding: 22px; }
/* membership doc lap chua mo checkout (config membership.pages.main.open) */
.ss .mem-closed { background: #E2E8F0; color: #475569; box-shadow: none; cursor: default; pointer-events: none; }
/* FE v2 (16/10): old-vs-new table, stack list, P.S., source footnote */
.ss-vs td:first-child { color: var(--muted); }
.ss-vs td:last-child { color: var(--ink); font-weight: 600; }
.ss-ref { color: var(--blue, #2563EB); text-decoration: none; font-size: .75em; margin-left: 2px; }
.ss .ss-stack-list { margin: 0; padding-left: 1.25rem; display: grid; gap: 14px; }
.ss .ss-stack-list li { line-height: 1.55; }
.ss .ss-stack-list li span { display: block; color: var(--muted); font-size: .9rem; margin-top: 2px; }
.ss .ss-bullets li { line-height: 1.6; }
.ss .ss-ps { font-size: 1.05rem; line-height: 1.7; color: var(--ink-2, #334155); }
/* tieu de dai (FE v2): nho hon va rong hon de khong thanh 8 dong */
.ss-hero h1.ss-h1-long { max-width: 22ch; font-size: clamp(1.9rem, 3.6vw, 2.75rem); line-height: 1.1; }

/* ===================================================================
 * FE v3 (chu duyet 16/10, mockup docs/mockups/fe-v3): hero navy + demo,
 * thanh mua dinh, input->output, khoi mua lap lai, khoi so le, the stack.
 * =================================================================== */
.ss-btn-lg { min-height: 56px; padding: 0 28px; font-size: 1.05rem; }

/* thanh mua dinh: desktop o tren, dien thoai o day */
.v3-bar { position: fixed; top: 0; left: 0; right: 0; z-index: 60; transform: translateY(-110%); transition: transform .25s ease; background: rgba(11, 18, 34, .94); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(255,255,255,.08); }
.v3-bar.on { transform: none; }
.v3-bar-in { display: flex; align-items: center; gap: 16px; height: 62px; }
.v3-bar-name { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; }
.v3-bar-name .ss-mark { width: 28px; height: 28px; font-size: .85rem; }
.v3-bar-meta { color: #94A3B8; font-size: .9rem; }
.v3-bar-meta b { color: #fff; }
.v3-bar .ss-btn { margin-left: auto; }
@media (max-width: 640px) {
  .v3-bar { top: auto; bottom: 0; transform: translateY(110%); border-bottom: 0; border-top: 1px solid rgba(255,255,255,.08); }
  .v3-bar-meta, .v3-bar-name { display: none; }
  .v3-bar .ss-btn { flex: 1; }
}

/* hero */
.v3-hero { color: #fff; padding: 22px 0 96px; overflow: hidden;
  background: radial-gradient(1200px 600px at 85% -10%, rgba(14,165,233,.22), transparent 60%), radial-gradient(900px 500px at -10% 110%, rgba(37,99,235,.25), transparent 60%), #0B1222; }
.v3-nav { display: flex; align-items: center; gap: 12px; padding: 4px 0 52px; }
.v3-brand { display: flex; align-items: center; gap: 10px; color: #fff !important; text-decoration: none; }
.v3-brand b { font-size: 1.15rem; }
.v3-brand small { color: #94A3B8; font-size: .85rem; }
.v3-nav-links { margin-left: auto; display: flex; gap: 22px; }
.v3-nav-links a { color: #CBD5E1 !important; text-decoration: none; font-weight: 500; }
.v3-hero-grid { display: grid; grid-template-columns: minmax(0,1.05fr) minmax(0,.95fr); gap: 56px; align-items: center; }
.v3-hero-grid > * { min-width: 0; }
.v3-kick { color: #7DD3FC; font-weight: 700; font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; }
.ss .v3-hero h1 { color: #fff; font-size: clamp(2.3rem, 4.6vw, 3.6rem); line-height: 1.04; margin-top: 16px; max-width: none; }
.v3-hl { background: linear-gradient(transparent 58%, rgba(14,165,233,.35) 58%); padding: 0 .06em; white-space: nowrap; }
.v3-hl-l { background: linear-gradient(transparent 60%, rgba(14,165,233,.28) 60%); padding: 0 .06em; }
.v3-h2 { font-size: clamp(1.15rem, 1.8vw, 1.45rem); line-height: 1.35; font-weight: 600; color: #CBD5E1; margin-top: 18px; }
.v3-lede { color: #94A3B8; font-size: 1.05rem; line-height: 1.65; margin-top: 18px; max-width: 54ch; }
.v3-lede .ss-ref { color: #7DD3FC; }
.v3-cta { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; margin-top: 30px; }
.v3-small { color: #64748B; font-size: .82rem; max-width: 56ch; }
.v3-opens { color: #7DD3FC; font-size: .85rem; font-weight: 600; }
.v3-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.v3-chip { display: inline-flex; align-items: center; gap: 7px; font-size: .82rem; font-weight: 500; color: var(--ink-2); background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; }
.v3-chip svg { width: 15px; height: 15px; stroke: var(--blue); }
.v3-chips.dark .v3-chip { color: #CBD5E1; background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.12); }
.v3-chips.dark .v3-chip svg { stroke: #7DD3FC; }

.v3-demo { background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.1); border-radius: 22px; padding: 18px; box-shadow: 0 40px 80px -30px rgba(0,0,0,.6); overflow: hidden; }
.v3-demo-dots { display: flex; gap: 6px; margin-bottom: 14px; }
.v3-demo-dots i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.18); }
.v3-url { display: flex; gap: 10px; align-items: center; background: #fff; border-radius: 12px; padding: 8px 8px 8px 14px; }
.v3-url-t { flex: 1; min-width: 0; color: var(--ink); font: .85rem ui-monospace, Menlo, monospace; white-space: nowrap; overflow: hidden; }
.v3-url-t.typing::after { content: ''; display: inline-block; width: 2px; height: 16px; background: var(--blue); vertical-align: -3px; margin-left: 1px; animation: v3blink 1s steps(1) infinite; }
.v3-url-go { background: var(--grad); color: #fff; font-weight: 700; font-size: .8rem; border-radius: 9px; padding: 9px 14px; white-space: nowrap; }
@keyframes v3blink { 50% { opacity: 0; } }
.v3-fan { position: relative; height: 360px; margin-top: 22px; }
.v3-fan img { position: absolute; width: 44%; height: auto; aspect-ratio: 4/5; object-fit: cover; border-radius: 12px; box-shadow: 0 20px 40px -14px rgba(0,0,0,.7); opacity: 0; transform: translateY(30px) scale(.94); transition: opacity .45s ease, transform .45s ease; }
.v3-fan.go img { opacity: 1; }
.v3-fan.go img:nth-child(1) { left: 0; top: 40px; transform: rotate(-9deg); }
.v3-fan.go img:nth-child(2) { left: 18%; top: 14px; transform: rotate(-3deg); transition-delay: .12s; }
.v3-fan.go img:nth-child(3) { left: 37%; top: 4px; transform: rotate(3deg); transition-delay: .24s; }
.v3-fan.go img:nth-child(4) { left: 56%; top: 26px; transform: rotate(9deg); transition-delay: .36s; }
.v3-demo-cap { display: flex; justify-content: space-between; gap: 12px; color: #94A3B8; font-size: .75rem; margin-top: 6px; }
.v3-demo-cap b { color: #fff; }
@media (max-width: 900px) { .v3-hero-grid { grid-template-columns: minmax(0,1fr); gap: 40px; } .v3-fan { height: 300px; } }
@media (max-width: 520px) { .v3-nav-links a:first-child { display: none; } .v3-url-go { font-size: .72rem; padding: 8px 10px; } .v3-fan { height: 240px; } }

/* nen toi dung chung (secrets, promise) */
.v3-dark { background: #0B1222; color: #CBD5E1; }
.ss .v3-dark h2, .ss .v3-dark h3 { color: #fff; }
.v3-dark .ss-kicker { color: #7DD3FC; }
.v3-dark .ss-sub, .v3-dark .ss-lede { color: #94A3B8; }
.v3-dark .ss-card { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.1); box-shadow: none; }
.v3-dark .ss-card p { color: #94A3B8; }
.v3-dark .ss-tag { background: rgba(125,211,252,.12); color: #7DD3FC; }
.v3-dark a { color: #7DD3FC; }

/* cach cu / cach moi */
.v3-vs { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 28px; }
.v3-vs-card { border-radius: 20px; padding: 28px; border: 1px solid var(--line); background: #fff; }
.v3-vs-card.new { border: 2px solid var(--blue); box-shadow: 0 24px 50px -30px rgba(37,99,235,.6); }
.v3-vs-lab { font-size: .78rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.v3-vs-card.new .v3-vs-lab { color: var(--blue); }
.v3-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 6px; }
.v3-tabs span { display: inline-flex; align-items: center; gap: 8px; font-size: .82rem; font-weight: 600; color: var(--muted); background: #F1F5F9; border: 1px solid var(--line); border-radius: 8px; padding: 7px 11px; }
.v3-vs-card.old .v3-tabs span:nth-child(odd) { transform: rotate(-2deg); }
.v3-vs-card.old .v3-tabs span:nth-child(even) { transform: rotate(2deg); }
.v3-tabs.one span { color: var(--ink); background: #EFF6FF; border-color: #BFDBFE; font-size: .9rem; }
.v3-tabs .ss-mark { width: 20px; height: 20px; font-size: .7rem; border-radius: 6px; font-style: normal; }
@media (max-width: 760px) { .v3-vs { grid-template-columns: 1fr; } }

/* input -> output */
.v3-io { background: #F8FAFC; border-top: 1px solid var(--line); }
.v3-io-row { display: grid; grid-template-columns: 290px 52px minmax(0,1fr); gap: 20px; align-items: center; margin-top: 36px; }
.v3-io-row > * { min-width: 0; }
.v3-src { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 20px; box-shadow: var(--shadow); }
.v3-src-lab { font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.v3-src-url { margin-top: 10px; font: .8rem ui-monospace, Menlo, monospace; color: var(--blue); word-break: break-all; }
.v3-src h3 { font-size: 1.1rem; line-height: 1.3; margin-top: 12px; }
.v3-src p:last-child { color: var(--muted); font-size: .88rem; line-height: 1.55; margin-top: 8px; }
.v3-arrow { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%; background: var(--grad); color: #fff; font-size: 1.4rem; font-weight: 700; box-shadow: 0 10px 24px -10px rgba(37,99,235,.8); }
.v3-strip-slides { display: flex; gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 6px 4px 14px; -webkit-mask-image: linear-gradient(90deg, #000 88%, transparent); mask-image: linear-gradient(90deg, #000 88%, transparent); }
.v3-strip-slides:focus-visible { outline: 2px solid var(--blue); outline-offset: 4px; border-radius: 12px; }
.v3-strip-slides figure { margin: 0; flex: 0 0 186px; scroll-snap-align: start; }
.v3-strip-slides img { width: 186px; height: auto; aspect-ratio: 4/5; border-radius: 12px; box-shadow: 0 12px 26px -16px rgba(15,23,42,.55); }
.v3-strip-slides figcaption { font-size: .75rem; color: var(--muted); margin-top: 6px; text-align: center; }
@media (max-width: 900px) { .v3-io-row { grid-template-columns: minmax(0,1fr); } .v3-arrow { transform: rotate(90deg); margin: 0 auto; } }

/* khoi mua gon (lap lai) */
.v3-strip { margin: 36px auto 0; display: flex; flex-direction: column; align-items: center; gap: 14px; text-align: center; padding: 28px; border-radius: 20px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); max-width: 720px; }
.v3-strip-main { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; justify-content: center; }
.v3-strip-price b { font-size: 2.4rem; font-weight: 800; letter-spacing: -.03em; color: var(--ink); }
.v3-strip-price span { color: var(--muted); font-weight: 600; margin-left: 6px; }
.v3-dark .v3-strip { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.1); }

/* how it works: the step */
.v3-steps { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.v3-steps li { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 16px; display: flex; flex-direction: column; gap: 10px; box-shadow: var(--shadow); }
.v3-step-n { align-self: flex-start; font-size: .75rem; font-weight: 800; color: #fff; background: var(--grad); padding: 4px 10px; border-radius: 999px; }
.v3-steps img { width: 100%; height: 150px; object-fit: cover; object-position: top left; border-radius: 10px; border: 1px solid var(--line); }
.v3-steps img.v3-step-slide { object-fit: contain; background: #0B1222; }
.v3-steps h3 { font-size: 1.05rem; }
.v3-steps p { color: var(--muted); font-size: .9rem; line-height: 1.55; }
@media (max-width: 980px) { .v3-steps { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 560px) { .v3-steps { grid-template-columns: minmax(0,1fr); } }

/* tinh nang so le */
.v3-zigs { display: flex; flex-direction: column; gap: 72px; margin-top: 40px; }
.v3-zig { display: grid; grid-template-columns: minmax(0,1.1fr) minmax(0,1fr); gap: 48px; align-items: center; }
.v3-zig.rev > figure { order: 2; }
.v3-zig h3 { font-size: 1.5rem; line-height: 1.2; }
@media (max-width: 900px) { .v3-zig { grid-template-columns: minmax(0,1fr); gap: 24px; } .v3-zig.rev > figure { order: 0; } }

/* stack: the co hinh */
.v3-cards { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; margin-top: 28px; }
.v3-card { background: #fff; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; display: flex; flex-direction: column; box-shadow: var(--shadow); }
.v3-card-media { height: 150px; background: linear-gradient(135deg, #EFF6FF, #E0F2FE); display: grid; place-items: center; overflow: hidden; }
.v3-card-media img { width: 100%; height: 100%; object-fit: cover; object-position: top left; }
.v3-card-media img.tall { width: auto; height: 130px; border-radius: 8px; box-shadow: 0 10px 22px -12px rgba(15,23,42,.6); }
.v3-card-ic svg { width: 56px; height: 56px; stroke: var(--blue); }
.v3-card-body { padding: 18px; display: flex; flex-direction: column; gap: 6px; }
.v3-card-body h3 { font-size: 1.02rem; }
.v3-card-body p { color: var(--ink-2); font-size: .9rem; line-height: 1.55; }
.v3-card-body span { color: var(--muted); font-size: .8rem; }
@media (max-width: 900px) { .v3-cards { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 560px) { .v3-cards { grid-template-columns: minmax(0,1fr); } }

/* con dau 30 ngay (tu thiet ke, khong phai "guarantee") */
.v3-seal { width: 96px; height: 96px; border-radius: 50%; display: grid; place-items: center; text-align: center; border: 2px solid rgba(125,211,252,.5); box-shadow: inset 0 0 0 6px rgba(125,211,252,.08); color: #E0F2FE; font-weight: 800; line-height: 1.05; align-self: center; }
.v3-seal b { display: block; font-size: 1.8rem; }
.v3-seal span { font-size: .6rem; letter-spacing: .12em; text-transform: uppercase; color: #7DD3FC; }
.v3-seal.big { width: 120px; height: 120px; margin: 0 auto 6px; }
.v3-seal.big b { font-size: 2.3rem; }

@media (prefers-reduced-motion: reduce) { .v3-bar, .v3-fan img { transition: none; } .v3-url-t.typing::after { animation: none; } }
/* .ss p { margin: 0 } thang .v3-* (do dac hieu) -> khai bao lai voi tien to .ss */
.ss .v3-h2 { margin-top: 18px; }
.ss .v3-lede { margin-top: 18px; }
.ss .v3-src-url { margin-top: 10px; }
.ss .v3-src p:last-child { margin-top: 8px; }
.ss .v3-center-note { margin: 16px auto 0; text-align: center; }

/* ===================================================================
 * FE v4 (16/10): hero sang "creator studio", tieu de can giua, dien thoai
 * co carousel tu luot; Stack Graphic bang anh that. Tien to v4-.
 * =================================================================== */
.v4-hero { position: relative; overflow: hidden; padding: 22px 0 64px;
  background: radial-gradient(760px 460px at 90% 30%, rgba(14,165,233,.16), transparent 65%),
              radial-gradient(640px 440px at 15% 85%, rgba(236,72,153,.09), transparent 65%),
              radial-gradient(560px 380px at 10% 8%, rgba(245,158,11,.10), transparent 65%), #FFFDF9; }
.v4-nav { display: flex; align-items: center; gap: 12px; padding: 4px 0 44px; }
.v4-brand { display: flex; align-items: center; gap: 10px; color: var(--ink) !important; text-decoration: none; }
.v4-brand b { font-size: 1.15rem; } .v4-brand small { color: var(--muted); font-size: .85rem; }
.v4-nav-links { margin-left: auto; display: flex; gap: 22px; }
.v4-nav-links a { color: var(--ink-2) !important; text-decoration: none; font-weight: 500; }
.v4-head { max-width: 880px; margin: 0 auto; text-align: center; display: flex; flex-direction: column; align-items: center; }
.ss .v4-eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: .82rem; font-weight: 700; color: var(--blue); background: #EFF6FF; border: 1px solid #DBEAFE; padding: 6px 12px; border-radius: 999px; }
.v4-eyebrow i { width: 8px; height: 8px; border-radius: 50%; background: conic-gradient(#F59E0B, #EC4899, #8B5CF6, #0EA5E9, #F59E0B); }
.ss .v4-hero h1 { font-size: clamp(2.3rem, 4.8vw, 3.75rem); line-height: 1.05; margin-top: 18px; max-width: 20ch; }
.v4-mk { background: linear-gradient(transparent 62%, rgba(14,165,233,.28) 62%); padding: 0 .06em; white-space: nowrap; }
.ss .v4-sub { font-size: clamp(1.1rem, 1.7vw, 1.3rem); font-weight: 600; color: var(--ink-2); margin-top: 16px; }
.ss .v4-lede { color: var(--muted); font-size: 1.02rem; line-height: 1.65; margin-top: 14px; max-width: 62ch; }
.v4-cta { display: flex; flex-direction: column; align-items: center; gap: 14px; margin-top: 26px; }
.v4-cta .v3-chips { justify-content: center; }
.ss .v4-small { color: var(--muted); font-size: .8rem; max-width: 60ch; }

.v4-stage { position: relative; height: 640px; max-width: 900px; margin: 44px auto 0; }
.v4-ghost { position: absolute; width: 230px; height: auto; border-radius: 16px; box-shadow: 0 30px 60px -28px rgba(15,23,42,.5); }
.v4-ghost.l { left: 70px; top: 120px; transform: rotate(-8deg); }
.v4-ghost.r { right: 70px; top: 80px; transform: rotate(7deg); }
.v4-phone { position: absolute; left: 50%; top: 0; transform: translateX(-50%) rotate(1.5deg); z-index: 2; width: 310px; border-radius: 46px; padding: 12px; background: #0B0F19; box-shadow: 0 50px 90px -35px rgba(15,23,42,.55), inset 0 0 0 2px #1F2937; }
.v4-phone::before { content: ''; position: absolute; top: 18px; left: 50%; transform: translateX(-50%); width: 92px; height: 24px; border-radius: 14px; background: #000; z-index: 3; }
.v4-screen { border-radius: 36px; overflow: hidden; background: #fff; }
.v4-post-h { display: flex; align-items: center; gap: 9px; padding: 48px 14px 10px; }
.v4-av { width: 30px; height: 30px; border-radius: 50%; padding: 2px; background: conic-gradient(#F59E0B, #EC4899, #8B5CF6, #0EA5E9, #F59E0B); }
.v4-av i { display: block; width: 100%; height: 100%; border-radius: 50%; background: #F5EFE6; border: 2px solid #fff; }
.v4-post-h b { font-size: .82rem; color: var(--ink); } .v4-post-h span:last-child { margin-left: auto; color: #94A3B8; letter-spacing: 2px; }
.v4-car { position: relative; aspect-ratio: 4/5; overflow: hidden; background: #F1F5F9; }
.v4-track { display: flex; height: 100%; transition: transform .55s cubic-bezier(.6,.05,.25,1); }
.v4-track img { flex: 0 0 100%; width: 100%; height: 100%; object-fit: cover; }
.v4-count { position: absolute; top: 10px; right: 10px; background: rgba(15,23,42,.65); color: #fff; font: 600 .7rem Inter, sans-serif; padding: 4px 8px; border-radius: 999px; }
.v4-post-a { display: flex; align-items: center; gap: 14px; padding: 10px 14px 4px; }
.v4-post-a svg { width: 22px; height: 22px; stroke: var(--ink); fill: none; stroke-width: 1.8; }
.v4-post-a .v4-save { margin-left: auto; }
.ss .v4-post-c { padding: 6px 14px 18px; font-size: .75rem; line-height: 1.45; color: var(--ink-2); text-align: left; }
.v4-post-c b { color: var(--ink); }
.v4-float { position: absolute; z-index: 4; background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 20px 40px -22px rgba(15,23,42,.45); padding: 12px 14px; font-size: .75rem; display: flex; flex-direction: column; gap: 6px; text-align: left; color: var(--muted); }
.v4-float b { color: var(--ink); font-size: .78rem; }
.v4-kit { left: 40px; bottom: 30px; width: 220px; }
.v4-sw { display: flex; gap: 6px; } .v4-sw i { width: 26px; height: 26px; border-radius: 8px; border: 1px solid rgba(0,0,0,.06); }
.v4-cap { right: 30px; bottom: 70px; width: 220px; }
.v4-exp { right: 120px; top: 18px; flex-direction: row; align-items: center; gap: 8px; font-weight: 600; color: var(--ink); }
.v4-exp svg { width: 16px; height: 16px; stroke: var(--blue); fill: none; stroke-width: 2; }
.ss .v4-stage-note { text-align: center; color: var(--muted); font-size: .78rem; margin-top: 18px; }
@media (max-width: 900px) {
  .v4-ghost { display: none; }
  .v4-kit { left: 0; bottom: -10px; } .v4-cap { right: 0; bottom: 40px; } .v4-exp { right: 0; }
}
@media (max-width: 560px) {
  .v4-nav-links a:first-child { display: none; }
  .v4-stage { height: 600px; }
  .v4-phone { width: 270px; }
  .v4-cap, .v4-exp { display: none; }
  .v4-kit { left: 50%; transform: translateX(-50%); bottom: -20px; }
}
@media (prefers-reduced-motion: reduce) { .v4-track { transition: none; } }

/* Stack Graphic */
.v4-bundle { margin: 32px 0 0; }
.v4-bundle-art { position: relative; height: 560px; max-width: 1040px; margin: 0 auto; }
.v4-laptop { position: absolute; left: 50%; top: 22px; transform: translateX(-50%); width: 600px; z-index: 2; }
.v4-lid { background: #0B0F19; border-radius: 18px 18px 6px 6px; padding: 14px 14px 18px; box-shadow: 0 40px 80px -40px rgba(15,23,42,.6); }
.v4-lid img { border-radius: 6px; aspect-ratio: 16/10; object-fit: cover; object-position: top left; width: 100%; height: auto; }
.v4-base { height: 16px; margin: 0 -50px; background: linear-gradient(#E2E8F0, #CBD5E1); border-radius: 0 0 18px 18px; position: relative; }
.v4-base::after { content: ''; position: absolute; left: 50%; top: 0; transform: translateX(-50%); width: 110px; height: 6px; background: #94A3B8; border-radius: 0 0 8px 8px; }
.v4-tfan { position: absolute; left: 0; bottom: 24px; width: 300px; height: 260px; z-index: 3; }
.v4-tfan img { position: absolute; width: 140px; height: auto; border-radius: 10px; box-shadow: 0 18px 30px -16px rgba(15,23,42,.6); }
.v4-tfan img:nth-child(1) { left: 0; top: 60px; transform: rotate(-12deg); }
.v4-tfan img:nth-child(2) { left: 55px; top: 30px; transform: rotate(-4deg); }
.v4-tfan img:nth-child(3) { left: 110px; top: 20px; transform: rotate(4deg); }
.v4-tfan img:nth-child(4) { left: 160px; top: 40px; transform: rotate(12deg); }
.v4-book { position: absolute; right: 30px; bottom: 30px; width: 220px; height: 280px; z-index: 3; border-radius: 6px 14px 14px 6px; background: linear-gradient(160deg, #1E3A8A, #0B1222 70%); color: #fff; padding: 22px 20px; box-shadow: inset -8px 0 0 -2px #0EA5E9, 0 30px 50px -24px rgba(15,23,42,.7); display: flex; flex-direction: column; text-align: left; }
.v4-book small { font-size: .62rem; letter-spacing: .14em; text-transform: uppercase; color: #7DD3FC; font-weight: 700; }
.v4-book b { font-size: 1.3rem; line-height: 1.12; margin-top: 10px; }
.v4-rows { margin-top: auto; display: grid; gap: 6px; }
.v4-rows i { display: block; height: 6px; border-radius: 3px; background: rgba(255,255,255,.18); }
.v4-rows i:nth-child(1) { width: 80%; } .v4-rows i:nth-child(2) { width: 60%; } .v4-rows i:nth-child(3) { width: 70%; }
.v4-book em { font-style: normal; font-size: .65rem; color: #94A3B8; margin-top: 10px; }
.v4-hooks, .v4-check { position: absolute; z-index: 4; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 14px; box-shadow: 0 20px 40px -22px rgba(15,23,42,.5); display: flex; flex-direction: column; gap: 6px; text-align: left; }
.v4-hooks { right: 270px; bottom: 6px; width: 190px; }
.v4-check { left: 300px; bottom: 0; width: 180px; }
.v4-hooks b, .v4-check b { font-size: .8rem; color: var(--ink); }
.v4-hooks small, .v4-check small { font-size: .7rem; color: var(--muted); line-height: 1.4; }
.v4-hk { display: flex; gap: 6px; } .v4-hk i { flex: 1; height: 22px; border-radius: 6px; background: #EFF6FF; border: 1px solid #DBEAFE; }
.v4-bars { display: flex; align-items: flex-end; gap: 6px; height: 44px; } .v4-bars i { flex: 1; border-radius: 4px 4px 0 0; background: var(--grad); }
.v4-pill { position: absolute; z-index: 5; background: var(--ink); color: #fff; font-size: .75rem; font-weight: 700; padding: 6px 10px; border-radius: 999px; white-space: nowrap; }
.v4-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 24px; }
.v4-legend span { font-size: .82rem; font-weight: 600; color: var(--ink-2); background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 7px 12px; }
.v4-legend b { color: var(--blue); }
@media (max-width: 1060px) { .v4-bundle-art { transform: scale(.8); transform-origin: top center; height: 460px; } }
@media (max-width: 760px) { .v4-bundle-art { transform: scale(.52); height: 300px; width: 1040px; left: 50%; margin-left: -520px; } }
.v4-bundle { overflow: hidden; }
@media (max-width: 900px) { .ss .v4-ghost { display: none; } }
@media (max-width: 560px) { .v4-stage { height: 640px; } .v4-kit { bottom: -40px; } }
@media (max-width: 560px) {
  .v4-stage { height: auto; display: flex; flex-direction: column; align-items: center; gap: 20px; }
  .v4-phone { position: relative; left: auto; top: auto; transform: rotate(1.5deg); }
  .v4-kit { position: relative; left: auto; bottom: auto; transform: none; }
}
/* Hero A hai cot (chu chot lai theo mockup A 16/10): chu trai, dien thoai phai */
.v4-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 40px; align-items: center; }
.v4-grid > * { min-width: 0; }
.v4-grid .v4-head { text-align: left; align-items: flex-start; margin: 0; max-width: none; }
.ss .v4-grid .v4-head h1 { font-size: clamp(2.2rem, 4vw, 3.25rem); max-width: none; }
.ss .v4-grid .v4-lede { max-width: 52ch; }
.v4-grid .v4-cta { align-items: flex-start; }
.v4-grid .v4-cta .v3-chips { justify-content: flex-start; }
.v4-grid .v4-stage { margin: 0; max-width: none; height: 640px; }
.v4-grid .v4-ghost { width: 210px; }
.v4-grid .v4-ghost.l { left: 0; top: 120px; }
.v4-grid .v4-ghost.r { right: 0; top: 70px; }
.v4-grid .v4-kit { left: -30px; bottom: -6px; }
.v4-grid .v4-cap { right: -24px; bottom: 30px; }
.v4-grid .v4-exp { right: 40px; top: 14px; }
.ss .v4-stage-note { margin-top: 28px; }
@media (max-width: 960px) {
  .v4-grid { grid-template-columns: minmax(0,1fr); gap: 36px; }
  .v4-grid .v4-kit { left: 0; } .v4-grid .v4-cap { right: 0; } .v4-grid .v4-exp { right: 0; }
}
@media (max-width: 560px) {
  .v4-grid .v4-stage { height: auto; }
  .v4-grid .v4-kit { left: auto; bottom: auto; }
}
@media (min-width: 961px) { .v4-grid .v4-kit { bottom: -44px; } .v4-grid .v4-cap { bottom: 0; } }
/* video demo */
.v4-video { padding-top: 72px; }
.v4-video-frame { max-width: 980px; margin: 28px auto 0; }
.v4-video-frame video { display: block; width: 100%; height: auto; background: #0B1222; }
/* template: 12 thiet ke 4 cot + the ngang Product Showcase */
.ss-tpls.v4-tpls { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px 20px; }
@media (max-width: 900px) { .ss-tpls.v4-tpls { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 620px) { .ss-tpls.v4-tpls { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 12px; } }
.v4-showcase { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 28px; align-items: center; margin-top: 32px; padding: 22px; border-radius: 18px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.v4-showcase img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 10px; box-shadow: 0 10px 24px -14px rgba(15,23,42,.5); }
.v4-showcase h3 { font-size: 1.3rem; }
@media (max-width: 620px) { .v4-showcase { grid-template-columns: 120px minmax(0, 1fr); gap: 16px; padding: 14px; } .v4-showcase .ss-sub { font-size: .85rem; } }

/* ===================================================================
 * OTO v5 (16/10): dai "don hang da xong" + tien do pheu, hero sang hai cot
 * voi anh app that, thanh mua dinh, khoi mua giua trang. Tien to v5-.
 * =================================================================== */
.v5-done { background: #ECFDF5; border-bottom: 1px solid #C6F0D5; }
.v5-done-in { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; justify-content: space-between; padding-top: 12px; padding-bottom: 12px; }
.v5-done-msg { display: inline-flex; align-items: center; gap: 10px; color: #166534; font-weight: 600; font-size: .92rem; }
.v5-done-msg svg { width: 20px; height: 20px; flex: none; stroke: #fff; fill: none; stroke-width: 3; background: #16A34A; border-radius: 50%; padding: 3px; }
.v5-progress { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 6px; font-size: .78rem; font-weight: 600; }
.v5-progress li { display: inline-flex; align-items: center; gap: 6px; color: #64748B; padding: 5px 10px; border-radius: 999px; background: #fff; border: 1px solid #D1FAE5; }
.v5-progress li::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: #CBD5E1; }
.v5-progress li.done { color: #166534; } .v5-progress li.done::before { background: #16A34A; }
.v5-progress li.skip { color: #94A3B8; text-decoration: line-through; }
.v5-progress li.now { color: #fff; background: var(--grad); border-color: transparent; } .v5-progress li.now::before { background: #fff; }
@media (max-width: 760px) { .v5-progress { display: none; } }

.v5-hero { position: relative; overflow: hidden; padding: 56px 0 72px;
  background: radial-gradient(760px 460px at 92% 30%, rgba(14,165,233,.15), transparent 65%),
              radial-gradient(560px 380px at 8% 90%, rgba(236,72,153,.08), transparent 65%), #FFFDF9; }
.v5-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 48px; align-items: center; }
.v5-grid > * { min-width: 0; }
.ss .v5-hero h1 { font-size: clamp(2rem, 3.6vw, 3rem); line-height: 1.07; margin-top: 16px; max-width: none; }
.ss .v5-lede { color: var(--muted); font-size: 1.05rem; line-height: 1.65; margin-top: 16px; max-width: 54ch; }
.v5-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; margin-top: 26px; }
.ss .v5-small { color: var(--muted); font-size: .82rem; }
.v5-visual { position: relative; height: 470px; }
.ss .v5-shot { position: absolute; margin: 0; width: 86%; }
.v5-shot img { display: block; width: 100%; height: auto; }
.v5-shot-0 { left: 0; top: 0; z-index: 2; }
.v5-shot-1 { right: 0; bottom: 0; width: 62% !important; z-index: 3; transform: rotate(2deg); }
.v5-chip { flex-direction: row !important; align-items: center; gap: 8px !important; color: var(--ink) !important; font-weight: 600; font-size: .8rem !important; white-space: nowrap; }
.v5-chip svg { width: 16px; height: 16px; flex: none; stroke: #fff; fill: none; stroke-width: 3; background: var(--grad); border-radius: 50%; padding: 2px; }
.v5-chip-0 { left: -18px; bottom: 120px; }
.v5-chip-1 { right: 36%; bottom: -10px; }
.v5-chip-2 { right: -10px; top: 18px; }
@media (max-width: 960px) {
  .v5-grid { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .v5-visual { height: 420px; }
}
@media (max-width: 560px) {
  .v5-hero { padding-top: 36px; }
  .v5-visual { height: auto; display: flex; flex-direction: column; gap: 12px; }
  .ss .v5-shot { position: relative; width: 100%; }
  .v5-shot-1 { display: none; }
  .v5-chip { position: relative !important; left: auto !important; right: auto !important; top: auto !important; bottom: auto !important; align-self: flex-start; }
}
.v3-dark .ss-callout { background: rgba(255,255,255,.05); border-color: rgba(125,211,252,.25); color: #CBD5E1; }
.v5-hero .v4-mk { white-space: normal; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.v5-progress li.past { color: #64748B; } .v5-progress li.past::before { background: #94A3B8; }
/* membership hero v5 */
.v5-plans { display: flex; flex-wrap: wrap; gap: 12px; }
.ss .v5-btn-alt { background: #fff; color: var(--blue) !important; border: 2px solid var(--blue); box-shadow: none; }
.v5-next { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; height: 170px; border-radius: 16px; border: 2px dashed #93C5FD; background: #EFF6FF; text-align: center; }
.v5-next span { font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--blue); }
.v5-next b { font-size: 1.2rem; color: var(--ink); }
.v5-next small { color: var(--muted); font-size: .8rem; }
@media (max-width: 560px) { .v5-next { display: none; } }

/* ===================================================================
 * JV v2 (16/10): hero sang + bac hoa hong, swipe co nut copy, banner tai ve.
 * =================================================================== */
.v6-jv-hero { padding-bottom: 80px; }
.v6-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 26px; }
.v6-jump { font-weight: 600; color: var(--blue) !important; text-decoration: none; padding: 0 6px; }
.v6-ladder { background: #0B1222; color: #CBD5E1; border-radius: 22px; padding: 26px; box-shadow: 0 40px 80px -35px rgba(15,23,42,.6); }
.ss .v6-ladder-k { font-size: .75rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: #7DD3FC; }
.v6-ladder ol { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 8px; }
.v6-ladder li { display: grid; grid-template-columns: minmax(0,1fr) auto auto; gap: 14px; align-items: center; padding: 12px 14px; border-radius: 12px; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.08); font-size: .9rem; }
.v6-ladder li b { color: #fff; }
.v6-ladder li em { font-style: normal; font-size: .75rem; font-weight: 700; color: #7DD3FC; background: rgba(125,211,252,.12); padding: 3px 8px; border-radius: 999px; }
.v6-ladder li strong { color: #fff; font-size: 1.1rem; font-variant-numeric: tabular-nums; text-align: right; }
.v6-ladder li strong small { display: block; font-size: .7rem; color: #94A3B8; font-weight: 600; }
.v6-ladder li.alt { opacity: .75; border-style: dashed; }
.v6-ladder li.rec { border-color: rgba(125,211,252,.35); }
.ss .v6-ladder-total { margin-top: 16px; font-size: .95rem; color: #E2E8F0; }
.v6-ladder-total b { color: #fff; font-size: 1.1rem; }
.ss .v6-ladder-fine { margin-top: 6px; font-size: .75rem; color: #64748B; }
.v6-why { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; margin-top: 24px; }
@media (max-width: 980px) { .v6-why { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 560px) { .v6-why { grid-template-columns: minmax(0,1fr); } .v6-ladder li { grid-template-columns: minmax(0,1fr) auto; } .v6-ladder li em { display: none; } }
.v6-swipes { display: grid; gap: 12px; margin-top: 24px; max-width: 860px; margin-left: auto; margin-right: auto; width: 100%; }
.v6-swipe { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 16px 18px; box-shadow: var(--shadow); }
.v6-swipe summary { cursor: pointer; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; list-style: none; }
.v6-swipe summary::-webkit-details-marker { display: none; }
.v6-swipe pre, .v6-mini { white-space: pre-wrap; font: .9rem/1.6 Inter, system-ui, sans-serif; color: var(--ink-2); background: #F8FAFC; border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 14px 0 10px; }
.v6-copy { font: 600 .85rem Inter, sans-serif; color: var(--blue); background: #EFF6FF; border: 1px solid #BFDBFE; border-radius: 10px; padding: 8px 14px; cursor: pointer; }
.v6-assets { display: grid; grid-template-columns: minmax(0,1.4fr) minmax(0,1fr); gap: 18px; margin-top: 28px; }
.v6-asset { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.v6-banners { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 10px; width: 100%; margin: 6px 0 8px; }
.v6-banners a { display: flex; flex-direction: column; gap: 4px; text-decoration: none; color: var(--muted) !important; font-size: .75rem; }
.v6-banners img { width: 100%; height: 110px; object-fit: contain; background: #F1F5F9; border: 1px solid var(--line); border-radius: 10px; }
@media (max-width: 900px) { .v6-assets { grid-template-columns: minmax(0,1fr); } .v6-banners { grid-template-columns: repeat(2, minmax(0,1fr)); } }
.v6-jv-hero .v4-mk { white-space: normal; -webkit-box-decoration-break: clone; box-decoration-break: clone; }