/* ===== Nền Móng — trang chủ v3 "Bảng mạch" (13/11/2026). Chỉ trang chủ dùng; trang con dùng tokens.css + site.css. ===== */
:root {
  color-scheme: dark;
  --bg: #070B11; --bg-2: #0A1018; --panel: #0E1620; --panel-2: #121C28;
  --text: #EEF1F4; --text-2: #A9B6C6; --text-3: #7A889C;
  --line: rgba(160, 190, 230, .12); --line-2: rgba(160, 190, 230, .22);
  --trace: rgba(150, 178, 220, .26);
  --copper: #D99A2B; --copper-2: #F0BC5E; --spark: #FFE3A6; --copper-dim: rgba(217, 154, 43, .16);
  --data: #7CC4FF; --data-dim: rgba(124, 196, 255, .14);
  --ok: #5CC08B; --danger: #F0776C;
  --font-head: "Archivo", "Be Vietnam Pro", "Segoe UI", system-ui, sans-serif;
  --font-body: "Be Vietnam Pro", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Mono", Consolas, ui-monospace, monospace;
  --container: 1200px; --pad: clamp(16px, 4vw, 40px);
  --section-y: clamp(72px, 3rem + 5vw, 132px);
  --ease: cubic-bezier(.22, 1, .36, 1);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 clamp(1rem, .98rem + .12vw, 1.0625rem)/1.65 var(--font-body);
  background-image: radial-gradient(rgba(160, 190, 230, .07) 1px, transparent 1.4px);
  background-size: 26px 26px; overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-family: var(--font-head); font-stretch: 96%; text-wrap: balance; }
:focus-visible { outline: 2px solid var(--copper-2); outline-offset: 3px; border-radius: 6px; }
.wrap { width: min(100% - 2 * var(--pad), var(--container)); margin-inline: auto; }
.mono { font-family: var(--font-mono); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--text-3); }
.mono b { color: var(--copper-2); font-weight: 500; }
.tag { display: inline-flex; align-items: center; gap: 10px; }
.tag::before { content: ""; width: 22px; height: 2px; background: var(--copper); box-shadow: 0 0 10px var(--copper); }
section { padding-block: var(--section-y); position: relative; }
h2 { font-size: clamp(1.75rem, 1.3rem + 2vw, 2.875rem); line-height: 1.16; font-weight: 700; margin-top: 14px; max-width: 22ch; }
.lead { color: var(--text-2); font-size: clamp(1.0625rem, 1.02rem + .25vw, 1.25rem); max-width: 58ch; margin-top: 18px; }
.gold { color: var(--copper-2); }

/* ---------- Nút (không viên thuốc) ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px; min-height: 48px; padding: 0 22px;
  font: 600 1rem var(--font-body); text-decoration: none; border-radius: 10px; border: 1px solid transparent;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s;
}
.btn--cta { background: linear-gradient(180deg, var(--copper-2), var(--copper)); color: #10161F;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.35), 0 0 0 1px rgba(217,154,43,.5), 0 10px 36px -8px rgba(217,154,43,.55); }
.btn--cta:hover { transform: translateY(-1px); box-shadow: inset 0 1px 0 rgba(255,255,255,.4), 0 0 0 1px var(--copper-2), 0 14px 44px -6px rgba(240,188,94,.7); }
.btn--cta svg { transition: transform .2s var(--ease); }
.btn--cta:hover svg { transform: translateX(3px); }
.btn--ghost { border-color: var(--line-2); color: var(--text); background: rgba(14, 22, 32, .6); }
.btn--ghost:hover { border-color: var(--copper); }
.btn--sm { min-height: 40px; padding: 0 16px; font-size: .9375rem; }

/* ---------- Header ---------- */
.top { position: fixed; inset: 0 0 auto 0; z-index: 20; backdrop-filter: blur(14px); background: rgba(7, 11, 17, .72); border-bottom: 1px solid var(--line); }
.top__in { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 700 1.125rem var(--font-head); letter-spacing: .01em; }
.top nav { display: flex; gap: 24px; margin-left: auto; }
.top nav a { text-decoration: none; color: var(--text-2); font-size: .9375rem; }
.top nav a:hover { color: var(--text); }
.top__cta { display: flex; gap: 10px; }
@media (max-width: 900px) { .top nav { display: none; } .top__cta { margin-left: auto; } .top__cta .btn--ghost { display: none; } }

/* ---------- Hero ---------- */
.hero { padding: 0; min-height: min(100svh, 920px); display: grid; align-items: center; isolation: isolate; overflow: hidden; border-bottom: 1px solid var(--line); }
#pcb { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60% 70% at 22% 48%, rgba(7, 11, 17, .92), transparent 70%),
    radial-gradient(46% 50% at 76% 46%, rgba(217, 154, 43, .10), transparent 70%),
    linear-gradient(180deg, rgba(7,11,17,.5), transparent 22%, transparent 78%, var(--bg)); }
@media (max-width: 979.98px) { .hero::before { background: linear-gradient(180deg, rgba(7,11,17,.78) 0, rgba(7,11,17,.78) 62%, rgba(7,11,17,.35) 80%, var(--bg)); } }
.hero__in { display: grid; gap: clamp(28px, 4vw, 64px); align-items: center; padding-block: 104px 56px; }
@media (min-width: 980px) { .hero__in { grid-template-columns: 1.08fr .92fr; } }
h1 { font-size: clamp(2.25rem, 1.35rem + 3.2vw, 3.5rem); line-height: 1.13; font-weight: 750; letter-spacing: -.012em; margin-top: 20px; }
h1 .l2 { display: block; background: linear-gradient(92deg, var(--copper-2) 0%, var(--spark) 45%, var(--copper) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; padding-bottom: .08em; }
h1 { text-wrap: wrap; } h1 .nb { display: block; }
.hero__cta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 20px; margin-top: 30px; }
.hero__note { color: var(--text-3); font-size: .9375rem; }
.specs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 34px; padding: 0; list-style: none; }
.specs li { font-family: var(--font-mono); font-size: .75rem; letter-spacing: .04em; color: var(--text-2); padding: 7px 11px; border: 1px solid var(--line); border-radius: 6px; background: rgba(14, 22, 32, .7); }
.specs li b { color: var(--copper-2); font-weight: 500; }

/* Module mạch ở hero */
.board { position: relative; border: 1px solid var(--line); border-radius: 18px; padding: clamp(10px, 2vw, 22px);
  background: linear-gradient(180deg, rgba(14, 22, 32, .86), rgba(9, 14, 21, .86)); backdrop-filter: blur(3px);
  box-shadow: 0 0 0 1px rgba(0,0,0,.4), 0 40px 120px -40px rgba(0,0,0,.9), 0 0 120px -50px rgba(217,154,43,.5); max-width: 560px; margin-inline: auto; width: 100%; }
.board::before, .board::after { content: ""; position: absolute; width: 18px; height: 18px; border: 2px solid var(--copper); opacity: .8; }
.board::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; border-top-left-radius: 18px; }
.board::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; border-bottom-right-radius: 18px; }
.board svg { display: block; width: 100%; height: auto; }
.board figcaption { display: flex; justify-content: space-between; gap: 12px; margin-top: 6px; }
.t-base { fill: none; stroke: var(--trace); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transition: stroke .25s; }
.t-in, .t-out { fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 10 110; }
.t-in { stroke: var(--spark); stroke-dashoffset: 10; animation: pulse-in 3.4s linear infinite; animation-delay: var(--d, 0s); }
.t-out { stroke: var(--data); stroke-dashoffset: -100; animation: pulse-out 3.4s linear infinite; animation-delay: calc(var(--d, 0s) + 1.7s); }
.glow .t-in, .glow .t-out { stroke-width: 7; opacity: .7; }
@keyframes pulse-in { 0% { stroke-dashoffset: 10; } 55%, 100% { stroke-dashoffset: -100; } }
@keyframes pulse-out { 0% { stroke-dashoffset: -100; } 55%, 100% { stroke-dashoffset: 10; } }
.node rect { fill: #0F1823; stroke: var(--line-2); transition: stroke .25s, fill .25s; }
.node .led { fill: var(--copper); animation: led 3.4s ease-in-out infinite; animation-delay: var(--d, 0s); }
@keyframes led { 0%, 100% { opacity: .35; } 8% { opacity: 1; } 30% { opacity: .35; } }
.node .nt { font: 600 13px var(--font-body); fill: var(--text); }
.node .nv { font: 400 10px var(--font-mono); fill: var(--text-3); }
.link:hover .t-base { stroke: var(--copper); }
.link:hover .node rect { stroke: var(--copper); fill: #152131; }
.link:hover .nv { fill: var(--copper-2); }
.halo { animation: halo 3.4s ease-in-out infinite; transform-origin: 230px 270px; }
@keyframes halo { 0%, 100% { opacity: .55; transform: scale(.94); } 50% { opacity: 1; transform: scale(1.06); } }
.io { font: 400 9px var(--font-mono); fill: var(--text-3); letter-spacing: .06em; }
@media (max-width: 600px) { .node .nv, .io { display: none; } .node .nt { font-size: 15px; transform: translateY(9px); } .node .led { transform: translateY(8px); } }
@media (hover: none) { .board figcaption span:first-child { visibility: hidden; } }
.paused * { animation-play-state: paused !important; }

/* ---------- Reveal ---------- */
.js .rv { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: calc(var(--i, 0) * 70ms); }
.js .rv.in { opacity: 1; transform: none; }

/* ---------- Bus: một đơn, năm chặng ---------- */
.bus { position: relative; margin-top: clamp(40px, 5vw, 72px); --p: 0; }
.bus__line { position: absolute; background: var(--trace); border-radius: 2px; }
.bus__fill { position: absolute; inset: 0; background: linear-gradient(90deg, var(--copper), var(--spark)); box-shadow: 0 0 14px var(--copper); transform-origin: 0 0; border-radius: 2px; }
.bus__spark { position: absolute; width: 12px; height: 12px; margin: -5px 0 0 -6px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 4px rgba(255, 227, 166, .25), 0 0 22px 6px var(--copper-2); }
.sts { list-style: none; margin: 0; padding: 0; display: grid; gap: 28px; }
.st { position: relative; }
.st__dot { width: 20px; height: 20px; border-radius: 50%; border: 2px solid var(--trace); background: var(--bg); position: relative; z-index: 1; transition: border-color .3s, box-shadow .3s, background .3s; }
.st__dot::after { content: ""; position: absolute; inset: 4px; border-radius: 50%; background: var(--text-3); opacity: .4; transition: background .3s, opacity .3s; }
.st.on .st__dot { border-color: var(--copper-2); box-shadow: 0 0 0 5px var(--copper-dim), 0 0 24px var(--copper); }
.st.on .st__dot::after { background: var(--spark); opacity: 1; }
.st__time { font: 500 .8125rem var(--font-mono); color: var(--text-3); letter-spacing: .06em; transition: color .3s; }
.st.on .st__time { color: var(--copper-2); }
.st__who { font: 650 1.0625rem var(--font-head); margin-top: 4px; }
.st__what { color: var(--text-2); font-size: .9375rem; line-height: 1.55; margin-top: 6px; }
.st__body { opacity: .45; transition: opacity .4s; }
.st.on .st__body { opacity: 1; }
.bus__foot { color: var(--text-3); font-size: .875rem; margin-top: 28px; }
@media (min-width: 860px) {
  .bus__line { top: 9px; left: 10%; right: 10%; height: 2px; }
  .bus__fill { transform: scaleX(var(--p)); }
  .bus__spark { top: 1px; left: calc(var(--p) * 100%); }
  .sts { grid-template-columns: repeat(5, 1fr); gap: 20px; }
  .st { text-align: center; }
  .st__dot { margin: 0 auto 18px; }
  .st__what { max-width: 24ch; margin-inline: auto; }
}
@media (max-width: 859.98px) {
  .bus__line { left: 9px; top: 10px; width: 2px; height: 0; }
  .bus__fill { transform: scaleY(var(--p)); background: linear-gradient(180deg, var(--copper), var(--spark)); }
  .bus__spark { left: 1px; top: calc(var(--p) * 100%); margin: -6px 0 0 -5px; }
  .st { padding-left: 44px; }
  .st__dot { position: absolute; left: 0; top: 0; }
}

/* ---------- Ba câu hỏi: tab + màn hình ---------- */
.alt { background: linear-gradient(180deg, transparent, rgba(14, 22, 32, .7) 12%, rgba(14, 22, 32, .7) 88%, transparent); }
.tabs { display: flex; gap: 8px; margin-top: 36px; flex-wrap: wrap; }
.tab { font: 600 .9375rem var(--font-body); color: var(--text-2); background: transparent; border: 1px solid var(--line); border-radius: 8px; padding: 10px 16px; cursor: pointer; display: inline-flex; gap: 10px; align-items: center; transition: border-color .2s, color .2s, background .2s; }
.tab i { font: 500 .6875rem var(--font-mono); font-style: normal; color: var(--text-3); }
.tab:hover { color: var(--text); border-color: var(--line-2); }
.tab[aria-selected="true"] { color: var(--text); border-color: var(--copper); background: var(--copper-dim); box-shadow: 0 0 24px -8px var(--copper); }
.tab[aria-selected="true"] i { color: var(--copper-2); }
.pane { display: grid; gap: clamp(24px, 4vw, 56px); margin-top: 32px; align-items: start; }
.pane[hidden] { display: none; }
@media (min-width: 980px) { .pane { grid-template-columns: .8fr 1.2fr; } }
.pane h3 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem); line-height: 1.2; font-weight: 700; }
.pane__sub { color: var(--copper-2); font-weight: 600; margin-top: 12px; }
.pts { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 16px; }
.pts li { padding-left: 26px; position: relative; color: var(--text-2); font-size: .9688rem; line-height: 1.55; }
.pts li::before { content: ""; position: absolute; left: 0; top: .5em; width: 12px; height: 12px; border: 2px solid var(--copper); border-radius: 50%; box-shadow: 0 0 10px -1px var(--copper); }
.pts b { display: block; color: var(--text); font-weight: 600; }
.screen { border: 1px solid var(--line-2); border-radius: 14px; background: var(--panel); overflow: hidden; box-shadow: 0 40px 100px -40px #000, 0 0 90px -50px var(--data); margin: 0; }
.screen__bar { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.screen__bar span { width: 8px; height: 8px; border-radius: 2px; background: var(--line-2); }
.screen__bar span:first-child { background: var(--copper); box-shadow: 0 0 8px var(--copper); }
.screen__bar em { margin-left: 6px; font-style: normal; }
.screen__img { position: relative; overflow: hidden; background: #fff; }
.screen__img img { width: 100%; filter: brightness(.94); }
.pane.scan .screen__img::after { content: ""; position: absolute; inset: 0 0 auto 0; height: 90px; pointer-events: none;
  background: linear-gradient(180deg, transparent, rgba(124, 196, 255, .28) 70%, rgba(255,255,255,.9) 99%, transparent); animation: scan .9s var(--ease) both; }
@keyframes scan { from { transform: translateY(-100px); } to { transform: translateY(900px); opacity: 0; } }
.ping { position: absolute; width: 22px; height: 22px; margin: -11px 0 0 -11px; border-radius: 50%; background: var(--copper); color: #10161F; font: 600 .6875rem/22px var(--font-mono); text-align: center; box-shadow: 0 0 0 3px rgba(255,255,255,.9), 0 4px 14px rgba(0,0,0,.4); }
.ping::after { content: ""; position: absolute; inset: -3px; border-radius: 50%; border: 2px solid var(--copper); animation: ring 2.2s ease-out infinite; }
@keyframes ring { from { transform: scale(1); opacity: .9; } to { transform: scale(2.4); opacity: 0; } }
.probes { list-style: none; margin: 0; padding: 12px 14px; display: flex; flex-wrap: wrap; gap: 8px 18px; border-top: 1px solid var(--line); }
.probes li { font: 400 .75rem var(--font-mono); color: var(--text-2); display: flex; gap: 8px; align-items: center; }
.probes li b { width: 18px; height: 18px; border-radius: 50%; background: var(--copper); color: #10161F; font-weight: 600; font-size: .625rem; line-height: 18px; text-align: center; flex: none; }
.probes .note { margin-left: auto; color: var(--text-3); }

/* ---------- Cổng logic: kiểm soát tiền ---------- */
.gate { margin-top: 44px; border: 1px solid var(--line); border-radius: 18px; background: var(--panel); padding: clamp(18px, 3vw, 36px); }
.gate__ctl { display: flex; flex-wrap: wrap; gap: 12px; }
.sw { display: inline-flex; align-items: center; gap: 12px; cursor: pointer; font: 500 .9375rem var(--font-body); color: var(--text); background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; }
.sw__t { width: 40px; height: 22px; border-radius: 6px; background: #1C2836; border: 1px solid var(--line-2); position: relative; flex: none; transition: background .2s, border-color .2s; }
.sw__t::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 4px; background: var(--text-3); transition: transform .25s var(--ease), background .2s; }
.sw[aria-checked="true"] .sw__t { background: var(--copper-dim); border-color: var(--copper); }
.sw[aria-checked="true"] .sw__t::after { transform: translateX(18px); background: var(--copper-2); box-shadow: 0 0 10px var(--copper); }
.circ { display: flex; align-items: center; margin-top: 30px; }
.g-node, .g-gate { flex: none; text-align: center; border: 1px solid var(--line-2); border-radius: 10px; padding: 14px 16px; background: var(--panel-2); min-width: 136px; transition: border-color .3s, box-shadow .3s, background .3s; }
.g-node strong, .g-gate strong { display: block; font: 650 1rem var(--font-head); }
.g-node small, .g-gate small { display: block; font: 400 .6875rem var(--font-mono); color: var(--text-3); margin-top: 4px; }
.g-gate { border-style: dashed; }
.g-wire { flex: 1; height: 2px; min-width: 24px; background: var(--trace); position: relative; overflow: hidden; }
.g-wire::after { content: ""; position: absolute; top: 0; left: -40%; width: 40%; height: 100%; background: linear-gradient(90deg, transparent, var(--spark)); opacity: 0; }
.g-node.live { border-color: var(--copper); box-shadow: 0 0 26px -8px var(--copper); }
.g-wire.live { background: rgba(217, 154, 43, .55); box-shadow: 0 0 10px var(--copper); }
.g-wire.live::after { opacity: 1; animation: flow-x 1.3s linear infinite; }
@keyframes flow-x { to { left: 100%; } }
@keyframes flow-y { to { top: 100%; } }
.g-gate.open { border-style: solid; border-color: var(--copper); box-shadow: 0 0 26px -8px var(--copper); }
.g-gate.block { border-color: var(--danger); box-shadow: 0 0 26px -8px var(--danger); }
.g-gate.block small { color: var(--danger); }
.g-end.live { border-color: var(--ok); box-shadow: 0 0 34px -6px var(--ok); background: rgba(92, 192, 139, .1); }
.g-end.live small { color: var(--ok); }
.gate__msg { margin-top: 24px; font: 400 .8125rem var(--font-mono); color: var(--text-2); min-height: 2.6em; }
.gate__msg::before { content: "› "; color: var(--copper-2); }
@media (max-width: 859.98px) {
  .circ { flex-direction: column; align-items: stretch; }
  .g-wire { width: 2px; height: 30px; flex: none; margin-inline: auto; min-width: 0; }
  .g-wire::after { left: 0; top: -40%; width: 100%; height: 40%; background: linear-gradient(180deg, transparent, var(--spark)); }
  .g-wire.live::after { animation-name: flow-y; }
}
.rules { display: grid; gap: 1px; margin-top: 28px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
@media (min-width: 720px) { .rules { grid-template-columns: repeat(3, 1fr); } }
.rules div { background: var(--bg-2); padding: 22px; }
.rules b { display: block; font: 650 1rem var(--font-head); }
.rules span { display: block; color: var(--text-2); font-size: .9063rem; line-height: 1.55; margin-top: 6px; }

/* ---------- Cách ly: mỗi công ty một mạch ---------- */
.iso { display: grid; gap: clamp(28px, 4vw, 64px); align-items: center; }
@media (min-width: 980px) { .iso { grid-template-columns: 1fr 1fr; } }
.lanes { border: 1px solid var(--line); border-radius: 18px; background: var(--panel); padding: 8px 22px; }
.lane { display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; padding: 22px 0; }
.lane + .lane { border-top: 8px solid transparent; border-image: repeating-linear-gradient(135deg, var(--line-2) 0 2px, transparent 2px 7px) 8; }
.lane__tag, .lane__db { font: 500 .75rem var(--font-mono); padding: 8px 10px; border: 1px solid var(--line-2); border-radius: 6px; color: var(--text-3); white-space: nowrap; }
.lane__w { height: 2px; background: var(--trace); position: relative; overflow: hidden; }
.lane__w::after { content: ""; position: absolute; top: 0; left: -30%; width: 30%; height: 100%; background: linear-gradient(90deg, transparent, var(--data)); animation: flow-x 2.4s linear infinite; animation-delay: var(--d, 0s); }
.lane.me .lane__tag, .lane.me .lane__db { color: var(--text); border-color: var(--copper); box-shadow: 0 0 20px -8px var(--copper); }
.lane.me .lane__w { background: rgba(217, 154, 43, .5); box-shadow: 0 0 10px var(--copper); }
.lane.me .lane__w::after { background: linear-gradient(90deg, transparent, var(--spark)); }
.iso ul { list-style: none; padding: 0; margin: 26px 0 0; display: grid; gap: 14px; }
.iso li { color: var(--text-2); padding-left: 26px; position: relative; font-size: .9688rem; }
.iso li::before { content: ""; position: absolute; left: 0; top: .55em; width: 14px; height: 2px; background: var(--data); box-shadow: 0 0 8px var(--data); }
.iso li b { color: var(--text); font-weight: 600; }
.honest { color: var(--text-3); font-size: .9063rem; margin-top: 22px; border-left: 2px solid var(--line-2); padding-left: 14px; }

/* ---------- CTA cuối ---------- */
.final { text-align: center; }
.final__box { position: relative; border: 1px solid var(--line-2); border-radius: 22px; padding: clamp(36px, 6vw, 80px) clamp(18px, 4vw, 56px); overflow: hidden;
  background: radial-gradient(60% 90% at 50% 0%, rgba(217, 154, 43, .16), transparent 70%), var(--panel); }
.final__box::before { content: ""; position: absolute; inset: 0 12% auto 12%; height: 2px; background: linear-gradient(90deg, transparent, var(--spark), transparent); box-shadow: 0 0 22px 2px var(--copper); }
.final h2 { margin-inline: auto; max-width: 26ch; }
.final .lead { margin-inline: auto; }
.steps { list-style: none; padding: 0; margin: 44px auto 0; display: grid; gap: 14px; max-width: 920px; text-align: left; counter-reset: s; }
@media (min-width: 760px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.steps li { counter-increment: s; border: 1px solid var(--line); border-radius: 12px; padding: 18px 18px 20px; background: var(--bg-2); }
.steps li::before { content: "0" counter(s); font: 500 .75rem var(--font-mono); color: var(--copper-2); letter-spacing: .1em; }
.steps b { display: block; font: 650 1.0625rem var(--font-head); margin-top: 8px; }
.steps span { display: block; color: var(--text-2); font-size: .9063rem; line-height: 1.55; margin-top: 6px; }
.final .hero__cta { justify-content: center; margin-top: 38px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
  .t-in, .t-out, .glow { display: none; }
  .js .rv { opacity: 1; transform: none; }
}

/* ---------- Bổ sung khi thành trang chủ ---------- */
.skip { position: absolute; left: -9999px; top: 8px; z-index: 30; background: var(--copper); color: #10161F; padding: 10px 14px; border-radius: 8px; font-weight: 600; }
.skip:focus { left: 12px; }
.anchor { position: relative; top: -90px; display: block; height: 0; }
section[id] { scroll-margin-top: 72px; }
.more { display: inline-flex; gap: 8px; margin-top: 24px; color: var(--copper-2); font-weight: 600; text-decoration: none; border-bottom: 1px solid rgba(240, 188, 94, .4); padding-bottom: 2px; }
.more:hover { border-bottom-color: var(--copper-2); }

.field { display: grid; gap: clamp(36px, 5vw, 72px); margin-top: clamp(36px, 5vw, 64px); align-items: end; }
@media (min-width: 900px) { .field { grid-template-columns: 1fr 1fr; } }
.field h3 { font-size: clamp(1.25rem, 1.1rem + .6vw, 1.5rem); font-weight: 700; margin-top: 28px; }
.field p { color: var(--text-2); margin-top: 10px; max-width: 46ch; }
.phones { display: flex; gap: clamp(14px, 3vw, 28px); align-items: flex-end; }
.phone { margin: 0; width: min(46%, 220px); }
.phone:nth-child(2) { transform: translateY(-28px); }
.phone img { border-radius: 26px; border: 6px solid #05080D; outline: 1px solid var(--line-2); box-shadow: 0 30px 70px -30px #000, 0 0 70px -40px var(--data); filter: brightness(.94); }
.phone figcaption, .paper figcaption { margin-top: 12px; }
.paper { margin: 0; max-width: 440px; }
.paper img { border-radius: 3px; box-shadow: 0 0 0 1px rgba(255,255,255,.08), 0 30px 80px -30px #000, 0 0 90px -50px var(--copper); filter: brightness(.95); transform: rotate(-1.2deg); }

.also { list-style: none; padding: 0; margin: 40px 0 0; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); counter-reset: a; }
.also li { counter-increment: a; background: var(--bg-2); padding: 22px 22px 24px; transition: background .2s; }
.also li:hover { background: var(--panel-2); }
.also li::before { content: counter(a, decimal-leading-zero); font: 500 .6875rem var(--font-mono); color: var(--copper-2); letter-spacing: .1em; }
.also b { display: block; font: 650 1rem var(--font-head); margin-top: 8px; }
.also span { display: block; color: var(--text-2); font-size: .9063rem; line-height: 1.55; margin-top: 6px; }

.faq { display: grid; gap: clamp(24px, 4vw, 64px); }
@media (min-width: 980px) { .faq { grid-template-columns: .7fr 1.3fr; } }
.qa { border-bottom: 1px solid var(--line); }
.qa:first-child { border-top: 1px solid var(--line); }
.qa summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 18px; align-items: baseline; padding: 18px 2px; font: 600 1.0313rem var(--font-body); }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; font: 400 1.25rem var(--font-mono); color: var(--copper-2); flex: none; transition: transform .2s var(--ease); }
.qa[open] summary::after { transform: rotate(45deg); }
.qa summary:hover { color: var(--copper-2); }
.qa p { color: var(--text-2); margin: 0 2px 20px; max-width: 68ch; }

footer { border-top: 1px solid var(--line); padding: 44px 0 36px; color: var(--text-3); font-size: .9063rem; }
.foot { display: grid; gap: 26px; }
@media (min-width: 860px) { .foot { grid-template-columns: 1fr 1.4fr; align-items: start; } .foot__base { grid-column: 1 / -1; } }
.foot__brand p { margin-top: 12px; max-width: 34ch; }
.foot__nav { display: flex; flex-wrap: wrap; gap: 10px 26px; }
.foot__nav a { color: var(--text-2); text-decoration: none; }
.foot__nav a:hover { color: var(--copper-2); }
.foot__base { border-top: 1px solid var(--line); padding-top: 20px; }
@media (prefers-reduced-motion: reduce) { .phone:nth-child(2), .paper img { transform: none; } }

/* Không có JS: không có tab ⇒ hiện cả ba khối, ẩn hàng nút tab. */
html:not(.js) .pane[hidden] { display: grid; }
html:not(.js) .tabs { display: none; }
html:not(.js) .pane + .pane { margin-top: 72px; }