/* ============================================================
   styles.css  —  LAYOUT DUNG CHUNG (SSOT) cho CMS maylamda
   Moi trang san pham deu tham chieu file nay. Doi style o 1 noi
   => tat ca trang doi theo. Port tu landing Coway Neo Plus (sky-blue).
   ============================================================ */
:root {
  /* ---- Color system ---- */
  --ink: #0c1e2e;
  --ink-2: #1d3547;
  --muted: #5b727a;
  --line: rgba(12, 30, 46, .12);
  --line-soft: rgba(12, 30, 46, .07);
  --soft: #eff7fd;
  --mist: #ddedf9;
  --aqua: #3aa5e8;
  --aqua-2: #6fc8f8;
  --aqua-dark: #1f78bd;
  --aqua-deep: #0e4a74;
  --amber: #ff8a3d;
  --gold: #f6b045;
  --warm: #f7f0e6;
  --white: #ffffff;

  /* ---- Gradients ---- */
  --grad-aqua: linear-gradient(135deg, #6fc8f8 0%, #2e93da 48%, #1f78bd 100%);
  --grad-warm: linear-gradient(135deg, #ffb066 0%, #ff8a3d 100%);
  --grad-dark: linear-gradient(165deg, #0c1e2e 0%, #0b2a44 56%, #07243a 100%);
  /* CTA gradient (SSOT cho mọi nút primary — trước đây hardcode rải 3 nơi) */
  --cta-1: #2e9be0;
  --cta-2: #17699f;
  --grad-cta: linear-gradient(135deg, var(--cta-1) 0%, #2493d8 45%, var(--cta-2) 100%);

  /* ---- Radius scale ---- */
  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 26px;
  --r-pill: 999px;

  /* ---- Shadow scale ---- */
  --sh-sm: 0 2px 10px rgba(12, 30, 46, .06);
  --sh-md: 0 14px 34px rgba(12, 30, 46, .10);
  --sh-lg: 0 30px 72px rgba(13, 42, 66, .18);
  --sh-glow: 0 26px 70px rgba(58, 165, 232, .30);

  --ease: cubic-bezier(.22, .61, .36, 1);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  letter-spacing: -.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(58, 165, 232, .22); }
.shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.hero-grid > *, .solution-grid > *, .trust-grid > *, .closing-grid > *, .spec-layout > *, .section-head > * { min-width: 0; }
html { overflow-x: hidden; }

/* ---- Nav ---- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 20;
  height: 74px; display: flex; align-items: center;
  backdrop-filter: blur(20px) saturate(140%); -webkit-backdrop-filter: blur(20px) saturate(140%);
  background: rgba(255, 255, 255, .76);
  border-bottom: 1px solid rgba(12, 30, 46, .07);
  transition: background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.nav.scrolled { background: rgba(255, 255, 255, .92); box-shadow: 0 10px 30px rgba(12, 30, 46, .08); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { font-weight: 800; font-size: 27px; letter-spacing: -.02em; }
.brand span { background: var(--grad-aqua); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 8px; color: var(--ink-2); font-size: 14.5px; font-weight: 600; }
.nav-links a { position: relative; padding: 8px 14px; border-radius: var(--r-pill); transition: color .2s var(--ease), background .2s var(--ease); }
.nav-links a::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 4px; height: 2px; border-radius: 2px;
  background: var(--grad-aqua); transform: scaleX(0); transform-origin: left; transition: transform .28s var(--ease);
}
.nav-links a:hover { color: var(--aqua-dark); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-cta, .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 50px; padding: 0 24px; border-radius: var(--r-pill);
  background: var(--ink); color: #fff; font-weight: 700; font-size: 15.5px; border: 1px solid var(--ink);
  box-shadow: 0 14px 28px rgba(12, 30, 46, .20);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), filter .25s var(--ease);
  position: relative; overflow: hidden; isolation: isolate;
}
.nav-cta { min-height: 46px; }
.btn.primary, .nav-cta {
  background: var(--grad-cta); border-color: transparent; color: #fff;
  box-shadow: var(--sh-glow);
}
.btn.primary::before, .nav-cta::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, .35) 50%, transparent 70%);
  transform: translateX(-120%); transition: transform .6s var(--ease);
}
.btn.primary:hover::before, .nav-cta:hover::before { transform: translateX(120%); }
.nav-cta:hover, .btn:hover { transform: translateY(-3px); box-shadow: 0 22px 44px rgba(31, 120, 189, .34); }
.btn:active, .nav-cta:active { transform: translateY(-1px); }
.btn.secondary {
  background: rgba(255, 255, 255, .7); color: var(--ink); box-shadow: var(--sh-sm); border-color: var(--line);
  backdrop-filter: blur(6px);
}
.btn.secondary:hover { background: #fff; border-color: var(--aqua); color: var(--aqua-dark); box-shadow: var(--sh-md); }
:focus-visible { outline: 3px solid rgba(58, 165, 232, .55); outline-offset: 3px; border-radius: 6px; }

/* ---- Language switcher ---- */
.nav-right { display: flex; align-items: center; gap: 14px; }
.lang-switch { display: inline-flex; align-items: center; gap: 2px; padding: 3px; border-radius: var(--r-pill); background: rgba(12, 30, 46, .06); border: 1px solid var(--line-soft); }
.lang-btn { display: inline-flex; align-items: center; justify-content: center; border: 0; background: transparent; cursor: pointer; font-weight: 800; font-size: 12.5px; color: var(--muted); padding: 6px 11px; border-radius: var(--r-pill); line-height: 1; font-family: inherit; text-decoration: none; transition: background .2s var(--ease), color .2s var(--ease); }
.lang-btn:hover { color: var(--aqua-dark); }
.lang-btn.active { background: #fff; color: var(--aqua-dark); box-shadow: var(--sh-sm); }
@media (max-width: 560px) { .lang-switch { padding: 2px; } .lang-btn { padding: 5px 9px; font-size: 12px; } }

/* ---- Hero (premium frosted banner) ---- */
.hero {
  position: relative; min-height: 100svh; display: grid; align-items: center; overflow: hidden;
  padding: 124px 0 72px;
  background:
    radial-gradient(130% 105% at 80% -18%, rgba(111, 200, 248, .30), transparent 52%),
    radial-gradient(85% 75% at -6% 110%, rgba(255, 138, 61, .11), transparent 55%),
    linear-gradient(118deg, #eaf5fe 0%, #dbecf9 46%, #f5fafe 100%);
}
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(60px); z-index: 0; pointer-events: none; }
.hero::before {
  width: 620px; height: 620px; top: -180px; right: -120px;
  background: radial-gradient(circle, rgba(111, 200, 248, .42), rgba(111, 200, 248, 0) 70%);
  animation: drift 18s ease-in-out infinite;
}
.hero::after {
  width: 520px; height: 520px; bottom: -220px; left: -140px;
  background: radial-gradient(circle, rgba(255, 138, 61, .20), rgba(255, 138, 61, 0) 70%);
  animation: drift 22s ease-in-out infinite reverse;
}
/* Banner mo chua chinh hinh san pham: template gan background-image = anh hero,
   lam mo sau + mask fade => truong sang cao cap phia sau/quanh san pham. */
.hero-photo-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-repeat: no-repeat; background-position: 80% 45%;
  background-size: min(60%, 720px) auto;
  filter: blur(46px) saturate(1.3) brightness(1.02);
  opacity: .62; transform: scale(1.12);
  -webkit-mask-image: radial-gradient(66% 70% at 80% 44%, #000 24%, transparent 74%);
          mask-image: radial-gradient(66% 70% at 80% 44%, #000 24%, transparent 74%);
  animation: heroBgFloat 20s var(--ease) infinite;
}
@keyframes heroBgFloat {
  0%, 100% { transform: scale(1.12) translate3d(0, 0, 0); }
  50%      { transform: scale(1.17) translate3d(-16px, 20px, 0); }
}
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, .92fr) minmax(360px, .78fr); gap: 56px; align-items: center; }
/* Kicker dang pill kinh — chi trong hero, khong doi kicker cac section khac */
.hero .kicker { padding: 7px 14px 7px 12px; border-radius: var(--r-pill); background: rgba(255, 255, 255, .68); border: 1px solid rgba(111, 200, 248, .38); box-shadow: var(--sh-sm); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.hero h1 .grad { background-size: 220% auto; animation: gradShimmer 7s linear infinite; }
.kicker { display: inline-flex; align-items: center; gap: 9px; color: var(--aqua-dark); font-weight: 800; text-transform: uppercase; font-size: 12.5px; letter-spacing: .08em; }
.kicker::before { content: ""; width: 22px; height: 2px; border-radius: 2px; background: var(--grad-aqua); }
h1 { margin: 16px 0 20px; font-size: clamp(31px, 6.6vw, 74px); line-height: 1.04; letter-spacing: -.03em; max-width: 760px; overflow-wrap: break-word; font-weight: 800; }
h1 .grad { background: var(--grad-aqua); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-copy { font-size: clamp(17px, 1.9vw, 21px); color: #39525a; max-width: 600px; margin: 0 0 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.micro-proof { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 10px; color: #41616a; font-size: 13.5px; font-weight: 600; }
.micro-proof > span {
  display: inline-flex; align-items: center; gap: 8px; padding: 9px 15px;
  border: 1px solid rgba(31, 120, 189, .18); border-radius: var(--r-pill); background: rgba(255, 255, 255, .72);
  box-shadow: var(--sh-sm); transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.micro-proof > span::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--aqua); box-shadow: 0 0 0 3px rgba(58, 165, 232, .18); }
.micro-proof > span:hover { transform: translateY(-2px); border-color: var(--aqua); box-shadow: var(--sh-md); }

.product-stage { position: relative; min-height: 680px; display: grid; place-items: center; }
/* Be kinh glassmorphism + dai sang quet ngang (sheen) — hieu ung business cao cap */
.product-stage::before {
  content: ""; position: absolute; width: min(468px, 90%); height: min(608px, 92%); border-radius: var(--r-lg);
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0) 40%, rgba(255, 255, 255, .55) 50%, rgba(255, 255, 255, 0) 60%) -60% 0 / 260% 100% no-repeat,
    radial-gradient(120% 78% at 50% 16%, rgba(255, 255, 255, .62), rgba(255, 255, 255, 0) 62%),
    linear-gradient(158deg, rgba(233, 244, 251, .5) 0%, rgba(198, 223, 240, .32) 52%, rgba(168, 207, 230, .28) 100%);
  border: 1px solid rgba(255, 255, 255, .75);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .9), 0 40px 92px rgba(16, 52, 82, .22), 0 0 0 1px rgba(111, 200, 248, .10);
  backdrop-filter: blur(15px) saturate(1.3); -webkit-backdrop-filter: blur(15px) saturate(1.3);
  transform: translateY(24px);
  animation: glassSheen 7.5s var(--ease) infinite;
}
.product-stage::after {
  content: ""; position: absolute; width: 340px; height: 340px; border-radius: 50%; z-index: 0;
  background: radial-gradient(circle, rgba(111, 200, 248, .55), rgba(111, 200, 248, 0) 66%);
  filter: blur(26px); transform: translateY(10px); animation: glowPulse 6s ease-in-out infinite;
}
.product-stage img {
  position: relative; z-index: 1; width: auto; max-width: min(410px, 84%); max-height: min(552px, 63vh);
  filter: drop-shadow(0 40px 60px rgba(16, 35, 43, .26)) drop-shadow(0 8px 18px rgba(16, 35, 43, .12));
  animation: floatIn 1.1s var(--ease) both, levitate 5.5s ease-in-out infinite 1.1s;
}
@keyframes glassSheen { 0% { background-position: -60% 0, 50% 20%, 0 0; } 55%, 100% { background-position: 180% 0, 50% 20%, 0 0; } }

/* ---- Con dấu "cam kết chính hãng" trên khung banner (dấu mộc uy tín + nhấp nháy) ---- */
.product-stage .trust-seal {
  position: absolute; z-index: 3; top: 4%; right: 3%;
  width: 130px; height: 130px; border-radius: 50%; overflow: hidden;
  display: grid; place-items: center; text-align: center; color: #5a3d0a;
  transform: rotate(-9deg);
  background:
    radial-gradient(circle at 34% 24%, rgba(255, 255, 255, .82), rgba(255, 255, 255, 0) 40%),
    conic-gradient(from 210deg, #a9711b, #ffe9a8, #f0be3a, #ffd76a, #c1841f, #fff1c4, #a9711b);
  box-shadow: 0 14px 30px rgba(120, 82, 12, .42), inset 0 0 0 2px rgba(255, 252, 236, .85), inset 0 0 0 8px rgba(168, 113, 27, .38);
  animation: sealPulse 2.6s ease-in-out infinite;
}
.product-stage .trust-seal::before {
  content: ""; position: absolute; inset: 10px; border-radius: 50%;
  border: 2px dashed rgba(92, 62, 12, .55); animation: sealSpin 16s linear infinite;
}
.product-stage .trust-seal::after {
  content: ""; position: absolute; inset: -25%; pointer-events: none;
  background: linear-gradient(115deg, transparent 42%, rgba(255, 255, 255, .72) 50%, transparent 58%);
  background-size: 250% 250%; animation: sealGlint 3.8s ease-in-out infinite;
}
.trust-seal .ts-in { position: relative; z-index: 1; display: grid; gap: 1px; line-height: 1.05; }
.trust-seal .ts-star { font-size: 10px; letter-spacing: 1.5px; color: #c0342a; text-shadow: 0 1px 1px rgba(255, 255, 255, .5); }
.trust-seal .ts-top { font-size: 9px; font-weight: 700; letter-spacing: 2px; color: #6b4a12; }
.trust-seal .ts-mid { font-size: 17px; font-weight: 900; letter-spacing: .3px; color: #4a3207; text-shadow: 0 1px 0 rgba(255, 255, 255, .55); }
.trust-seal .ts-bot { font-size: 8.5px; font-weight: 700; letter-spacing: 1px; opacity: .9; margin-top: 1px; }
@keyframes sealPulse {
  0%, 100% { transform: rotate(-9deg) scale(1); box-shadow: 0 14px 30px rgba(120, 82, 12, .42), inset 0 0 0 2px rgba(255, 252, 236, .85), inset 0 0 0 8px rgba(168, 113, 27, .38), 0 0 0 0 rgba(240, 190, 58, .55); }
  50% { transform: rotate(-9deg) scale(1.07); box-shadow: 0 18px 40px rgba(120, 82, 12, .5), inset 0 0 0 2px rgba(255, 255, 245, .95), inset 0 0 0 8px rgba(168, 113, 27, .45), 0 0 28px 8px rgba(240, 190, 58, .52); }
}
@keyframes sealSpin { to { transform: rotate(360deg); } }
@keyframes sealGlint { 0%, 60% { background-position: 210% 210%; } 88%, 100% { background-position: -60% -60%; } }
/* ---- Section base ---- */
section { padding: 104px 0; position: relative; }
.section-head { display: grid; grid-template-columns: .84fr .9fr; gap: 40px; align-items: end; margin-bottom: 56px; }
h2 { font-size: clamp(32px, 4.4vw, 52px); line-height: 1.04; margin: 0; letter-spacing: -.025em; font-weight: 800; }
.lead { color: #526970; font-size: 18px; margin: 0; }

/* ---- Pain band (dark) ---- */
.pain-band { background: var(--grad-dark); color: #fff; }
.pain-band::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5; background: radial-gradient(60% 60% at 85% 0%, rgba(111, 200, 248, .16), transparent 70%); }
.pain-band .shell { position: relative; z-index: 1; }
.pain-band .lead { color: rgba(255, 255, 255, .72); }
.pain-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.pain-item {
  padding: 28px; min-height: 220px; border-radius: var(--r-md);
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .12);
  transition: transform .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease);
}
.pain-item:hover { transform: translateY(-6px); background: rgba(255, 255, 255, .08); border-color: rgba(165, 218, 249, .5); }
.num { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 11px; color: var(--aqua-deep); font-weight: 900; font-size: 14px; background: linear-gradient(135deg, #a5daf9, #6fc8f8); }
.pain-item h3, .feature h3, .proof h3 { margin: 18px 0 10px; font-size: 21px; line-height: 1.2; font-weight: 700; letter-spacing: -.01em; }
.pain-item p, .proof p { margin: 0; color: rgba(255, 255, 255, .7); }

/* ---- Solution ---- */
.solution { background: var(--soft); overflow: hidden; }
.solution-grid { display: grid; grid-template-columns: .85fr 1fr; gap: 68px; align-items: center; }
.image-panel { position: relative; min-height: 640px; display: grid; place-items: center; }
.image-panel::before { content: ""; position: absolute; inset: 9% 12%; border-radius: var(--r-lg); background: linear-gradient(150deg, #ebf3fa 0%, #d2e6f4 56%, #b4d5ea 100%); box-shadow: var(--sh-lg); transform: rotate(-3deg); }
.image-panel::after { content: ""; position: absolute; width: 240px; height: 240px; border-radius: 50%; background: radial-gradient(circle, rgba(111, 200, 248, .4), transparent 68%); filter: blur(22px); }
.image-panel img { position: relative; z-index: 1; width: auto; max-width: min(370px, 78%); max-height: min(500px, 58vh); filter: drop-shadow(0 28px 40px rgba(16, 35, 43, .16)); }
.check-list { display: grid; gap: 14px; margin-top: 34px; }
.check { display: flex; gap: 16px; align-items: flex-start; padding: 16px 18px; border-radius: var(--r-md); background: #fff; border: 1px solid var(--line-soft); box-shadow: var(--sh-sm); transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease); }
.check:hover { transform: translateX(5px); box-shadow: var(--sh-md); border-color: rgba(58, 165, 232, .4); }
.check i { flex: 0 0 30px; width: 30px; height: 30px; border-radius: 9px; background: var(--grad-aqua); color: #fff; display: grid; place-items: center; font-style: normal; font-weight: 900; box-shadow: 0 6px 14px rgba(58, 165, 232, .3); }
.check strong { display: block; margin-bottom: 3px; font-size: 16px; }
.check span { color: var(--muted); font-size: 14.5px; }

/* ---- Features ---- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature { background: #fff; padding: 30px; min-height: 250px; border-radius: var(--r-md); border: 1px solid var(--line-soft); box-shadow: var(--sh-sm); position: relative; overflow: hidden; transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease); }
.feature::before { content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 100%; background: var(--grad-aqua); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease); }
.feature:hover { transform: translateY(-8px); box-shadow: var(--sh-lg); border-color: transparent; }
.feature:hover::before { transform: scaleX(1); }
.feature p { color: var(--muted); }
.feature small { display: inline-flex; align-items: center; gap: 7px; padding: 5px 12px; border-radius: var(--r-pill); color: var(--aqua-dark); font-weight: 700; text-transform: uppercase; letter-spacing: .05em; font-size: 11.5px; background: rgba(58, 165, 232, .1); }
.feature small::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--aqua); }

/* ---- Specs ---- */
.specs { background: linear-gradient(180deg, #ffffff 0%, #f2f8fd 100%); }
.spec-layout { display: grid; grid-template-columns: .84fr 1.16fr; gap: 48px; align-items: start; }
.spec-table { border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; background: #fff; box-shadow: var(--sh-md); }
.row { display: grid; grid-template-columns: 1fr 1.1fr; gap: 20px; padding: 17px 22px; border-bottom: 1px solid var(--line-soft); transition: background .2s var(--ease); }
.row:hover { background: var(--soft); }
.row:last-child { border-bottom: 0; }
.row span:first-child { color: var(--muted); }
.row strong { text-align: right; font-weight: 700; }

/* ============ Icons + brand-bar + spec grid + feature/trust icon ============ */
.ico { width: 22px; height: 22px; display: block; flex: 0 0 auto; }

/* Hero brand-trust bar (uy tín: chính hãng Coway, thương hiệu Hàn Quốc) */
.hero-brandbar { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; margin-bottom: 18px; }
.hero-brandbar .hbb-item { display: inline-flex; align-items: center; gap: 8px; padding: 7px 13px; border-radius: var(--r-pill); background: rgba(255, 255, 255, .74); border: 1px solid rgba(31, 120, 189, .16); box-shadow: var(--sh-sm); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); font-size: 12.5px; font-weight: 600; color: #33505c; }
.hero-brandbar .ico { width: 16px; height: 16px; color: var(--aqua-dark); }
.hero-brandbar .hbb-seal { font-weight: 800; color: var(--aqua-dark); }
.hero-brandbar .hbb-seal .ico { color: var(--gold); }

/* Spec grid — thay bảng phẳng bằng lưới thẻ có icon */
.spec-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.spec-item { display: grid; grid-template-columns: 44px 1fr; align-items: center; gap: 2px 14px; padding: 15px 16px; border-radius: var(--r-md); background: #fff; border: 1px solid var(--line-soft); box-shadow: var(--sh-sm); transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease); }
.spec-item:hover { transform: translateY(-3px); box-shadow: var(--sh-md); border-color: rgba(58, 165, 232, .35); }
.spec-ico { grid-row: 1 / span 2; width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center; background: linear-gradient(150deg, rgba(111, 200, 248, .20), rgba(58, 165, 232, .09)); color: var(--aqua-dark); border: 1px solid rgba(58, 165, 232, .16); transition: transform .28s var(--ease); }
.spec-item:hover .spec-ico { transform: rotate(-6deg) scale(1.06); }
.spec-ico .ico { width: 23px; height: 23px; }
.spec-label { grid-column: 2; align-self: end; font-size: 12.5px; color: var(--muted); font-weight: 600; }
.spec-val { grid-column: 2; align-self: start; font-size: 15.5px; font-weight: 800; color: var(--ink); letter-spacing: -.01em; line-height: 1.28; }

/* Feature icon tile */
.feature-ico { display: inline-grid; place-items: center; width: 54px; height: 54px; border-radius: 15px; margin-bottom: 18px; background: linear-gradient(150deg, rgba(111, 200, 248, .22), rgba(58, 165, 232, .10)); color: var(--aqua-dark); border: 1px solid rgba(58, 165, 232, .16); box-shadow: var(--sh-sm); transition: transform .3s var(--ease); }
.feature:hover .feature-ico { transform: translateY(-3px) rotate(-5deg); }
.feature-ico .ico { width: 27px; height: 27px; }
.feature small { margin-bottom: 10px; }

/* Trust proof icon */
.proof-ico { flex: 0 0 46px; width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; background: linear-gradient(150deg, rgba(111, 200, 248, .20), rgba(58, 165, 232, .10)); color: var(--aqua-dark); border: 1px solid rgba(58, 165, 232, .18); box-shadow: var(--sh-sm); transition: transform .28s var(--ease); }
.proof:hover .proof-ico { transform: rotate(-6deg) scale(1.06); }
.proof-ico .ico { width: 24px; height: 24px; }
.proof-body { min-width: 0; }
.proof-body h3 { margin: 1px 0 6px; font-size: 18px; }

/* ---- Đối tác (logo wall: grayscale → màu khi hover) ---- */
.partners { background: var(--soft); }
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.partner { display: grid; place-items: center; padding: 20px 18px; min-height: 100px; background: #fff; border: 1px solid var(--line-soft); border-radius: var(--r-md); box-shadow: var(--sh-sm); transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease); }
.partner img { max-width: 100%; max-height: 54px; width: auto; height: auto; transition: transform .3s var(--ease); }
.partner:hover { transform: translateY(-4px); box-shadow: var(--sh-md); border-color: rgba(58, 165, 232, .35); }
.partner:hover img { transform: scale(1.05); }
@media (max-width: 920px) { .partner-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 560px) { .partner-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; } .partner { min-height: 82px; padding: 14px; } .partner img { max-height: 44px; } }

/* ---- Price ---- */
.price-band { background: linear-gradient(170deg, #f9f2ea 0%, #f4ece1 100%); }
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.price-card { padding: 32px; background: #fff; border: 1px solid rgba(12, 30, 46, .1); border-radius: var(--r-lg); box-shadow: var(--sh-sm); position: relative; transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease); }
.price-card:hover { transform: translateY(-8px); box-shadow: var(--sh-lg); }
.price-card.featured { border: 1px solid transparent; background: linear-gradient(#fff, #fff) padding-box, var(--grad-aqua) border-box; box-shadow: var(--sh-glow); transform: translateY(-10px); }
.price-card.featured:hover { transform: translateY(-16px); }
.badge { position: absolute; top: -13px; left: 32px; display: inline-flex; align-items: center; gap: 7px; padding: 7px 14px; border-radius: var(--r-pill); background: var(--grad-warm); color: #fff; font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; box-shadow: 0 10px 22px rgba(255, 138, 61, .4); }
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #fff; }
.price-card .label { color: var(--muted); font-weight: 700; }
.price-card .price { font-size: 34px; line-height: 1.08; font-weight: 900; letter-spacing: -.02em; margin: 12px 0; }
.price-card.featured .price { background: var(--grad-aqua); -webkit-background-clip: text; background-clip: text; color: transparent; }
.price-card p { color: var(--muted); margin: 0; }
.price-hint { display: inline-flex; align-items: center; gap: 6px; margin: -4px 0 12px; padding: 5px 12px; border-radius: var(--r-pill); background: var(--mist); color: var(--aqua-dark); font-size: 12.5px; font-weight: 800; letter-spacing: .01em; }
.price-hint::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--aqua); }
.promo-sticker { position: relative; display: grid; gap: 7px; margin-top: 20px; padding: 15px 17px 14px; background: var(--grad-aqua); color: #fff; border-radius: 16px; border: 3px solid #fff; box-shadow: 0 14px 30px rgba(31, 120, 189, .32), 0 4px 10px rgba(31, 120, 189, .22); transform: rotate(-2deg); animation: sticker-bob 2.8s var(--ease) infinite; }
.promo-sticker .flash { justify-self: start; display: inline-flex; align-items: center; gap: 6px; padding: 4px 11px; border-radius: var(--r-pill); background: var(--grad-warm); color: #fff; font-size: 11.5px; font-weight: 900; text-transform: uppercase; letter-spacing: .06em; box-shadow: 0 6px 14px rgba(255, 138, 61, .45); animation: sticker-blink 1.5s ease-in-out infinite; }
.promo-sticker .line { font-size: 14.5px; line-height: 1.5; }
.promo-sticker .line strong { background: rgba(255, 255, 255, .2); padding: 1px 7px; border-radius: 7px; white-space: nowrap; }
.promo-sticker .sticker-cta { justify-self: start; display: inline-flex; align-items: center; margin-top: 3px; padding: 8px 15px; border-radius: var(--r-pill); background: #fff; color: var(--aqua-dark); font-weight: 800; font-size: 13.5px; box-shadow: 0 8px 18px rgba(13, 42, 66, .18); transition: transform .2s var(--ease); }
.promo-sticker .sticker-cta:hover { transform: scale(1.06); }
@keyframes sticker-bob { 0%, 100% { transform: rotate(-2deg) translateY(0); } 50% { transform: rotate(-1deg) translateY(-5px); } }
@keyframes sticker-blink { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

/* ---- Promo / discount (hot-pink) ---- */
.promo-banner { display: flex; align-items: center; justify-content: center; gap: 12px; margin: 0 auto 34px; padding: 14px 26px; max-width: 860px; border-radius: var(--r-pill); background: linear-gradient(100deg, #ff2d78 0%, #ff6a3d 100%); color: #fff; font-weight: 800; font-size: clamp(14px, 2.1vw, 18px); text-align: center; box-shadow: 0 16px 40px rgba(255, 45, 120, .36); animation: promoPulse 1.6s ease-in-out infinite; }
.promo-banner-ico { font-size: 1.35em; animation: promoShake 1.1s ease-in-out infinite; }
@keyframes promoPulse { 0%, 100% { box-shadow: 0 16px 40px rgba(255, 45, 120, .34); transform: translateY(0); } 50% { box-shadow: 0 22px 56px rgba(255, 45, 120, .55); transform: translateY(-2px); } }
@keyframes promoShake { 0%, 100% { transform: rotate(-9deg); } 50% { transform: rotate(9deg); } }

.price-card { overflow: visible; }
.save-flash { position: absolute; top: -14px; right: 20px; z-index: 3; display: inline-flex; align-items: center; padding: 7px 13px; border-radius: 12px; background: linear-gradient(135deg, #ff2d78, #ff5c3d); color: #fff; font-size: 14px; font-weight: 900; letter-spacing: .02em; box-shadow: 0 10px 22px rgba(255, 45, 120, .45); transform: rotate(6deg); animation: saveBlink 1s steps(1, end) infinite; }
@keyframes saveBlink { 0%, 100% { opacity: 1; transform: rotate(6deg) scale(1); } 50% { opacity: .4; transform: rotate(6deg) scale(1.09); } }
.price-row { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin: 12px 0; }
.price-row .price { margin: 0; }
.price-old { font-size: 17px; font-weight: 700; color: #9aa8ae; text-decoration: line-through; text-decoration-color: #ff2d78; text-decoration-thickness: 2px; }
.price-gift { display: flex; align-items: flex-start; gap: 9px; margin-top: 10px; padding: 11px 14px; border-radius: 12px; background: linear-gradient(120deg, #fff3f8, #ffeef0); border: 1px dashed #ffb0cd; color: #c81e63; font-weight: 700; font-size: 13.5px; line-height: 1.42; }
.price-gift .gift-ico { font-size: 1.2em; animation: giftBob 2s ease-in-out infinite; }
@keyframes giftBob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-3px); } }

/* ---- Trust ---- */
.trust { background: #fff; }
.trust-grid { display: grid; grid-template-columns: .78fr 1fr; gap: 60px; align-items: center; }
.proof-list { display: grid; gap: 14px; }
.proof { display: flex; gap: 16px; align-items: flex-start; padding: 20px 22px; border-radius: var(--r-md); background: var(--soft); border: 1px solid var(--line-soft); transition: transform .25s var(--ease), box-shadow .25s var(--ease); }
.proof:hover { transform: translateX(5px); box-shadow: var(--sh-md); }
.proof h3 { color: var(--ink); }
.trust .proof p { color: var(--muted); }

/* ---- Closing (dark) ---- */
.closing { position: relative; overflow: hidden; color: #fff; background: var(--grad-dark); padding-bottom: 0; }
.closing::before { content: ""; position: absolute; width: 600px; height: 600px; top: -260px; left: -120px; border-radius: 50%; background: radial-gradient(circle, rgba(111, 200, 248, .2), transparent 70%); filter: blur(40px); pointer-events: none; }
.closing-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr .72fr; gap: 60px; align-items: center; padding-bottom: 84px; }
.closing .lead { color: rgba(255, 255, 255, .74); }
.closing img { width: auto; max-width: min(340px, 84%); max-height: min(460px, 56vh); margin: auto; filter: drop-shadow(0 32px 50px rgba(0, 0, 0, .32)); }
.product-stage img, .image-panel img, .closing img { -webkit-user-drag: none; user-select: none; pointer-events: none; }

/* ---- Form ---- */
.form { margin-top: 32px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; position: relative; }
.form input, .form textarea { min-height: 52px; border-radius: var(--r-md); border: 1px solid rgba(255, 255, 255, .18); background: rgba(255, 255, 255, .07); color: #fff; padding: 0 18px; outline: none; font-size: 15px; transition: border-color .25s var(--ease), background .25s var(--ease), box-shadow .25s var(--ease); }
.form input::placeholder, .form textarea::placeholder { color: rgba(255, 255, 255, .55); }
.form input:focus, .form textarea:focus { border-color: var(--aqua-2); background: rgba(255, 255, 255, .12); box-shadow: 0 0 0 4px rgba(111, 200, 248, .18); }
.form textarea { grid-column: 1 / -1; padding: 14px 18px; min-height: 96px; line-height: 1.5; resize: vertical; font-family: inherit; }
.form .btn { grid-column: 1 / -1; margin-top: 4px; }
.form .hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.form button[disabled] { opacity: .6; cursor: default; }
.form-status { grid-column: 1 / -1; margin: 4px 2px 0; min-height: 18px; font-size: 14px; line-height: 1.45; color: rgba(255, 255, 255, .85); }
.form-status.error { color: #ffb1b1; }
.form-status.success { color: #9bd7f5; }

/* ---- Marquee ---- */
.marquee { border-top: 1px solid rgba(255, 255, 255, .12); overflow: hidden; padding: 18px 0; background: rgba(255, 255, 255, .04); -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track { display: flex; width: max-content; animation: marquee 30s linear infinite; }
.marquee-track:hover { animation-play-state: paused; }
.marquee-group { display: flex; align-items: center; gap: 44px; padding-right: 44px; flex: 0 0 auto; }
.marquee span { font-size: 18px; font-weight: 700; letter-spacing: .04em; color: rgba(255, 255, 255, .6); white-space: nowrap; }
.marquee em { color: #a5daf9; font-style: normal; font-weight: 800; margin-right: 7px; }

/* ---- Reveal / motion ---- */
.js .reveal { opacity: 0; transform: translateY(30px); transition: opacity .75s var(--ease), transform .75s var(--ease); }
.js .reveal.show { opacity: 1; transform: translateY(0); }
.js .stagger > * { opacity: 0; transform: translateY(22px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.js .stagger.show > * { opacity: 1; transform: translateY(0); }
.js .stagger.show > *:nth-child(1) { transition-delay: .04s; }
.js .stagger.show > *:nth-child(2) { transition-delay: .12s; }
.js .stagger.show > *:nth-child(3) { transition-delay: .20s; }
.js .stagger.show > *:nth-child(4) { transition-delay: .28s; }
.js .stagger.show > *:nth-child(5) { transition-delay: .36s; }
.js .stagger.show > *:nth-child(6) { transition-delay: .44s; }

@keyframes floatIn { from { opacity: 0; transform: translateY(30px) scale(.96); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes levitate { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes drift { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(-40px, 36px); } }
@keyframes glowPulse { 0%, 100% { opacity: .55; transform: scale(.92); } 50% { opacity: .9; transform: scale(1.06); } }

/* ---- Responsive ---- */
@media (max-width: 920px) {
  .nav-links { display: none; }
  .hero-grid, .section-head, .solution-grid, .spec-layout, .trust-grid, .closing-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 108px; }
  .hero-photo-bg { background-position: 50% 76%; background-size: min(78%, 460px) auto; opacity: .4;
    -webkit-mask-image: radial-gradient(70% 42% at 50% 76%, #000 22%, transparent 76%);
            mask-image: radial-gradient(70% 42% at 50% 76%, #000 22%, transparent 76%); }
  .product-stage { min-height: 540px; }
  .pain-list, .features-grid, .price-grid { grid-template-columns: 1fr; }
  .pain-item { min-height: auto; }
  .price-card.featured, .price-card.featured:hover { transform: none; }
  .form { grid-template-columns: 1fr; }
  section { padding: 78px 0; }
  .row strong { text-align: left; }
  .hero-copy { max-width: 100%; }
}
@media (max-width: 560px) {
  .shell { width: min(100% - 30px, 1180px); }
  .nav { height: 66px; }
  .nav-cta { display: none; }
  .hero-actions { align-items: stretch; }
  .btn { width: 100%; }
  .product-stage { min-height: 440px; }
  .image-panel { min-height: 460px; }
  .row { grid-template-columns: 1fr; gap: 4px; }
  .spec-grid { grid-template-columns: 1fr; }
  .product-stage .trust-seal { width: 96px; height: 96px; top: 2%; right: 4%; }
  .trust-seal .ts-mid { font-size: 13px; } .trust-seal .ts-top { font-size: 7.5px; letter-spacing: 1.5px; }
  .trust-seal .ts-bot { font-size: 7px; } .trust-seal .ts-star { font-size: 8px; }
  .badge { left: 24px; }
  .marquee span { font-size: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .js .reveal, .js .stagger > * { opacity: 1 !important; transform: none !important; }
}

/* ---- Footer ---- */
.site-footer { position: relative; background: var(--ink); color: rgba(255, 255, 255, .82); padding: 76px 0 30px; }
.site-footer::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(165, 218, 249, .45), transparent); }
.footer-grid { display: grid; grid-template-columns: 1fr .82fr; gap: 60px; align-items: center; }
.footer-grid > * { min-width: 0; }
.footer-logo { display: flex; align-items: center; gap: 14px; }
.footer-mark { width: 54px; height: 54px; border-radius: 16px; display: grid; place-items: center; background: var(--grad-aqua); color: #fff; font-weight: 800; font-size: 25px; box-shadow: var(--sh-glow); flex: 0 0 auto; }
.footer-logo strong { display: block; font-size: 21px; color: #fff; letter-spacing: -.01em; }
.footer-logo span { font-size: 13.5px; color: rgba(255, 255, 255, .58); }
.footer-desc { margin: 24px 0 26px; max-width: 430px; font-size: 15px; line-height: 1.72; color: rgba(255, 255, 255, .7); }
.footer-meta { display: flex; flex-wrap: wrap; gap: 12px 26px; font-size: 13.5px; color: rgba(255, 255, 255, .56); }
.footer-meta span { display: inline-flex; align-items: center; gap: 8px; }
.footer-meta svg { width: 17px; height: 17px; color: #a5daf9; flex: 0 0 auto; }

.contact-card { background: #fff; color: var(--ink); border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--sh-lg); }
.contact-card-head { display: flex; align-items: center; gap: 14px; padding: 20px 24px; background: var(--grad-aqua); color: #fff; }
.contact-avatar { width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; background: rgba(255, 255, 255, .22); border: 2px solid rgba(255, 255, 255, .65); font-weight: 800; font-size: 21px; flex: 0 0 auto; }
.contact-card-head strong { display: block; font-size: 17.5px; }
.contact-card-head span { font-size: 13px; color: rgba(255, 255, 255, .88); }
.contact-phones { padding: 10px 12px; }
.phone-row { display: flex; align-items: center; gap: 14px; padding: 13px 14px; border-radius: var(--r-md); transition: background .2s var(--ease), transform .2s var(--ease); }
.phone-row:hover { background: var(--soft); transform: translateX(2px); }
.phone-row + .phone-row { margin-top: 4px; }
.phone-ico { width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center; background: var(--mist); color: var(--aqua-dark); flex: 0 0 auto; }
.phone-ico svg { width: 21px; height: 21px; }
.phone-info { display: flex; flex-direction: column; line-height: 1.25; }
.phone-info em { font-style: normal; font-size: 11.5px; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: .05em; }
.phone-info b { font-size: 22px; font-weight: 800; letter-spacing: .01em; color: var(--ink); }
.contact-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 14px 18px 22px; border-top: 1px solid var(--line-soft); }
.contact-actions .btn { width: 100%; min-height: 48px; padding: 0 16px; }

.footer-bar { display: flex; justify-content: space-between; align-items: center; gap: 14px 24px; flex-wrap: wrap; margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255, 255, 255, .1); font-size: 13px; color: rgba(255, 255, 255, .5); }
.footer-bar a { color: rgba(255, 255, 255, .72); font-weight: 600; }
.footer-bar a:hover { color: #a5daf9; }

@media (max-width: 920px) { .footer-grid { grid-template-columns: 1fr; gap: 40px; } }
@media (max-width: 560px) { .site-footer { padding: 56px 0 26px; } .footer-bar { justify-content: center; text-align: center; } }

/* ============================================================
   MOTION UPGRADE (bổ sung 2026-07-07) — CHỈ thêm chuyển động.
   KHÔNG đổi màu / token / layout. Chỉ transform · opacity ·
   background-position. Tôn trọng prefers-reduced-motion (khối
   @media reduce phía trên đã vô hiệu mọi animation/transition).
   ============================================================ */

/* 1) Thanh tiến trình cuộn trên đỉnh (dùng gradient aqua sẵn có) */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 60;
  background: var(--grad-aqua); transform: scaleX(var(--sp, 0)); transform-origin: left;
  will-change: transform; pointer-events: none;
}

/* 2) Reveal mượt hơn: thêm scale nhẹ; ảnh vào có chiều sâu hơn */
.js .reveal { transform: translateY(32px) scale(.992); }
.js .reveal.show { transform: none; }
.js .image-panel.reveal, .js .product-stage.reveal { transform: translateY(30px) scale(.965); }
.js .image-panel.reveal.show, .js .product-stage.reveal.show { transform: none; }
/* Vạch kicker vẽ ra khi section hiện */
.kicker::before { transition: width .55s var(--ease) .15s; }
.js .reveal:not(.show) .kicker::before { width: 0; }

/* 3) Stagger sâu hơn (bảng/danh sách nhiều phần tử vẫn xếp tầng đẹp) */
.js .stagger.show > *:nth-child(7)  { transition-delay: .50s; }
.js .stagger.show > *:nth-child(8)  { transition-delay: .56s; }
.js .stagger.show > *:nth-child(9)  { transition-delay: .62s; }
.js .stagger.show > *:nth-child(10) { transition-delay: .68s; }

/* 4) Shimmer chạy trên chữ gradient (ĐỒNG MÀU — chỉ dịch vị trí gradient) */
@keyframes gradShimmer { to { background-position: 220% center; } }
h1 .grad, .price-card.featured .price { background-size: 220% auto; animation: gradShimmer 7s linear infinite; }

/* 5) Micro-interaction khi hover (thêm sức sống cho icon/số/giá) */
.check i, .feature small, .pain-item .num, .price-card .price { transition: transform .28s var(--ease); }
.check:hover i { transform: rotate(-8deg) scale(1.1); }
.feature:hover small { transform: translateY(-2px); }
.pain-item:hover .num { transform: scale(1.12) rotate(-5deg); }
.price-card:hover .price { transform: scale(1.04); }
.proof::before { transition: transform .3s var(--ease); transform-origin: center; }
.proof:hover::before { transform: scaleY(1.14); }

/* 6) Magnetic button (JS set transform) — chừa sẵn hint hợp thành */
.btn.primary, .nav-cta { will-change: transform; }
.spec-table .row strong { transition: color .2s var(--ease); }
.row:hover strong { color: var(--aqua-dark); }

/* ============================================================
   HERO ENTRANCE VARIANTS (2026-07-07) — mỗi trang một kiểu ảnh
   sản phẩm XUẤT HIỆN. Chọn qua content `hero.anim`; template gắn
   class .hero-anim-<x>. 'float' (mặc định) = giữ hiệu ứng cũ.
   Chỉ transform/opacity. Reduced-motion: khối @media reduce ở
   trên tự snap ảnh về trạng thái cuối (hiện, không chuyển động).
   ============================================================ */
/* easing có overshoot nhẹ → entrance "bật" vào rõ, linh động hơn (không quá toy) */
.hero-anim-zoom       .product-stage img { animation: heroZoom      1.5s  cubic-bezier(.34, 1.4, .5, 1) both, levitate 5.5s ease-in-out infinite 1.5s; }
.hero-anim-fly-left   .product-stage img { animation: heroFlyLeft   1.5s  cubic-bezier(.34, 1.36, .5, 1) both, levitate 5.5s ease-in-out infinite 1.5s; }
.hero-anim-fly-right  .product-stage img { animation: heroFlyRight  1.5s  cubic-bezier(.34, 1.36, .5, 1) both, levitate 5.5s ease-in-out infinite 1.5s; }
.hero-anim-fade-morph .product-stage img { animation: heroFadeMorph 1.5s  cubic-bezier(.4, 0, .2, 1) both, levitate 5.5s ease-in-out infinite 1.5s; }
.hero-anim-rise       .product-stage img { animation: heroRise      1.45s cubic-bezier(.2, .9, .3, 1.12) both, levitate 5.5s ease-in-out infinite 1.45s; }
.hero-anim-drop       .product-stage img { animation: heroDrop      1.45s cubic-bezier(.2, .9, .3, 1.14) both, levitate 5.5s ease-in-out infinite 1.45s; }
.hero-anim-swing      .product-stage img { transform-origin: top center; animation: heroSwing 1.6s cubic-bezier(.3, 1, .5, 1) both, levitate 5.5s ease-in-out infinite 1.6s; }
.hero-anim-unfold     .product-stage img { animation: heroUnfold    1.5s  cubic-bezier(.25, 1, .4, 1) both, levitate 5.5s ease-in-out infinite 1.5s; }

@keyframes heroZoom      { from { opacity: 0; transform: scale(.28); } to { opacity: 1; transform: none; } }
@keyframes heroFlyLeft   { from { opacity: 0; transform: translateX(-140px) rotate(-7deg); } to { opacity: 1; transform: none; } }
@keyframes heroFlyRight  { from { opacity: 0; transform: translateX(140px) rotate(7deg); } to { opacity: 1; transform: none; } }
@keyframes heroFadeMorph { 0% { opacity: 0; transform: scale(1.16) translateY(-10px); } 60% { opacity: 1; } 100% { opacity: 1; transform: none; } }
@keyframes heroRise      { from { opacity: 0; transform: translateY(92px); } to { opacity: 1; transform: none; } }
@keyframes heroDrop      { 0% { opacity: 0; transform: translateY(-92px); } 72% { opacity: 1; } 100% { opacity: 1; transform: none; } }
@keyframes heroSwing     { 0% { opacity: 0; transform: translateY(-30px) rotate(-13deg); } 55% { opacity: 1; transform: translateY(0) rotate(7deg); } 78% { transform: rotate(-3deg); } 100% { transform: none; } }
@keyframes heroUnfold    { from { opacity: 0; transform: perspective(1000px) rotateY(55deg) scale(.9); } to { opacity: 1; transform: none; } }

/* ============================================================
   NÚT CTA NỔI CỐ ĐỊNH (2026-07-07) — giữa-phải màn hình, mọi trang.
   Bấm -> cuộn tới #contact (form tư vấn). Dùng gradient aqua sẵn có.
   ============================================================ */
.float-cta {
  position: fixed; right: 16px; top: 50%; transform: translateY(-50%);
  z-index: 55; display: inline-flex; align-items: center; gap: 9px;
  padding: 11px 17px 11px 14px; border-radius: var(--r-pill);
  background: var(--grad-cta); color: #fff;
  font-weight: 800; font-size: 13.5px; letter-spacing: -.01em; line-height: 1;
  border: 2px solid rgba(255, 255, 255, .5);
  box-shadow: 0 14px 30px rgba(31, 120, 189, .42), 0 4px 10px rgba(31, 120, 189, .3);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), opacity .3s var(--ease), visibility .3s var(--ease);
  animation: floatCtaPulse 2.6s ease-in-out infinite;
}
.float-cta:hover { transform: translateY(-50%) scale(1.06); box-shadow: 0 20px 42px rgba(31, 120, 189, .5); }
.float-cta:active { transform: translateY(-50%) scale(.99); }
.float-cta-ico { display: grid; place-items: center; width: 21px; height: 21px; flex: 0 0 auto; }
.float-cta-ico svg { width: 20px; height: 20px; }
.float-cta.hide { opacity: 0; visibility: hidden; pointer-events: none; transform: translateY(-50%) translateX(24px); }
@keyframes floatCtaPulse {
  0%, 100% { box-shadow: 0 14px 30px rgba(31, 120, 189, .42), 0 0 0 0 rgba(58, 165, 232, .45); }
  50%      { box-shadow: 0 14px 30px rgba(31, 120, 189, .42), 0 0 0 12px rgba(58, 165, 232, 0); }
}
@media (max-width: 560px) {
  .float-cta { right: 12px; padding: 12px; gap: 0; }
  .float-cta-label { display: none; } /* nhỏ gọn: chỉ còn icon trên mobile */
}

/* ============================================================
   UPGRADE 2026-07-18 — FAQ + Related (SEO/AEO) · CTA sống động
   (token --grad-cta) · Hero bubbles VFX · Tilt 3D ảnh sản phẩm.
   Animation chỉ transform / opacity / background-position; khối
   @media (prefers-reduced-motion) phía trên tự vô hiệu tất cả.
   ============================================================ */

/* ---- CTA sống động: gradient trôi + pressed + mũi tên trượt ---- */
.btn.primary, .nav-cta { background-size: 190% auto; animation: ctaShift 5.5s ease-in-out infinite; }
.float-cta { background-size: 190% auto; animation: ctaShift 5.5s ease-in-out infinite, floatCtaPulse 2.6s ease-in-out infinite; }
@keyframes ctaShift { 0%, 100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
.btn:active, .nav-cta:active { transform: translateY(-1px) scale(.985); }
.btn-arr { display: inline-grid; place-items: center; width: 20px; height: 20px; flex: 0 0 auto; }
.btn-arr svg { width: 18px; height: 18px; transition: transform .25s var(--ease); }
.btn.primary:hover .btn-arr svg { transform: translateX(4px); }

/* ---- Hero bubbles (bong bóng nước — đúng brand lọc nước, transform/opacity only) ---- */
.hero-bubbles { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.hero-bubbles i {
  position: absolute; bottom: -48px; display: block; border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, rgba(255, 255, 255, .85), rgba(111, 200, 248, .28) 58%, rgba(111, 200, 248, .06) 100%);
  border: 1px solid rgba(255, 255, 255, .55);
  box-shadow: inset 0 -4px 8px rgba(58, 165, 232, .18);
  opacity: 0; animation: bubbleRise linear infinite;
}
.hero-bubbles i:nth-child(1)  { left: 6%;  width: 22px; height: 22px; animation-duration: 12s;   animation-delay: 0s; }
.hero-bubbles i:nth-child(2)  { left: 14%; width: 12px; height: 12px; animation-duration: 9.5s;  animation-delay: 3.2s; }
.hero-bubbles i:nth-child(3)  { left: 24%; width: 28px; height: 28px; animation-duration: 14s;   animation-delay: 1.4s; }
.hero-bubbles i:nth-child(4)  { left: 33%; width: 10px; height: 10px; animation-duration: 8.5s;  animation-delay: 5.6s; }
.hero-bubbles i:nth-child(5)  { left: 45%; width: 16px; height: 16px; animation-duration: 11s;   animation-delay: 2.3s; }
.hero-bubbles i:nth-child(6)  { left: 55%; width: 24px; height: 24px; animation-duration: 13.5s; animation-delay: 6.8s; }
.hero-bubbles i:nth-child(7)  { left: 66%; width: 13px; height: 13px; animation-duration: 9s;    animation-delay: 4.1s; }
.hero-bubbles i:nth-child(8)  { left: 76%; width: 30px; height: 30px; animation-duration: 15s;   animation-delay: .8s; }
.hero-bubbles i:nth-child(9)  { left: 86%; width: 15px; height: 15px; animation-duration: 10s;   animation-delay: 7.4s; }
.hero-bubbles i:nth-child(10) { left: 93%; width: 19px; height: 19px; animation-duration: 12.5s; animation-delay: 5.1s; }
@keyframes bubbleRise {
  0%   { opacity: 0; transform: translateY(0) scale(.65); }
  8%   { opacity: .75; }
  85%  { opacity: .5; }
  100% { opacity: 0; transform: translateY(-106vh) scale(1.08); }
}
@media (max-width: 560px) { .hero-bubbles i:nth-child(n+7) { display: none; } }

/* ---- Tilt 3D ảnh sản phẩm (JS set thuộc tính `rotate` — compose với animation transform) ---- */
.product-stage { perspective: 1000px; }
.product-stage img { transition: rotate .35s var(--ease); }

/* ---- FAQ (Hỏi & đáp — accordion <details> native, accessible) ---- */
.faq { background: linear-gradient(180deg, #f2f8fd 0%, #ffffff 72%); }
.faq-list { max-width: 880px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item {
  border: 1px solid var(--line-soft); border-radius: var(--r-md); background: #fff;
  box-shadow: var(--sh-sm); overflow: hidden;
  transition: box-shadow .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}
.faq-item:hover { box-shadow: var(--sh-md); border-color: rgba(58, 165, 232, .3); transform: translateY(-2px); }
.faq-item[open] { box-shadow: var(--sh-md); border-color: rgba(58, 165, 232, .35); }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 18px 22px; font-weight: 700; font-size: 16.5px; color: var(--ink); line-height: 1.4;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-chev {
  flex: 0 0 30px; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(58, 165, 232, .1); color: var(--aqua-dark);
  transition: transform .3s var(--ease), background .3s var(--ease), color .3s var(--ease);
}
.faq-chev svg { width: 16px; height: 16px; }
.faq-item[open] .faq-chev { transform: rotate(180deg); background: var(--grad-cta); color: #fff; }
.faq-a { padding: 0 22px 20px; color: var(--muted); font-size: 15px; line-height: 1.7; }
.faq-a p { margin: 0; }
.faq-item[open] .faq-a { animation: faqOpen .38s var(--ease); }
@keyframes faqOpen { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
@media (max-width: 560px) { .faq-item summary { padding: 15px 16px; font-size: 15px; } .faq-a { padding: 0 16px 16px; } }

/* ---- Related (link chéo 6 site — card sản phẩm liên quan) ---- */
.related { background: var(--soft); }
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.rel-card {
  display: grid; gap: 8px; align-content: start; padding: 22px 20px; background: #fff;
  border: 1px solid var(--line-soft); border-radius: var(--r-md); box-shadow: var(--sh-sm);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease), border-color .28s var(--ease);
}
.rel-card:hover { transform: translateY(-6px); box-shadow: var(--sh-lg); border-color: rgba(58, 165, 232, .4); }
.rel-model { justify-self: start; padding: 4px 11px; border-radius: var(--r-pill); background: rgba(58, 165, 232, .1); color: var(--aqua-dark); font-size: 11.5px; font-weight: 800; letter-spacing: .05em; }
.rel-name { font-size: 18px; letter-spacing: -.01em; }
.rel-tag { color: var(--muted); font-size: 13.5px; line-height: 1.5; }
.rel-go { display: inline-flex; align-items: center; gap: 7px; margin-top: 6px; color: var(--aqua-dark); font-weight: 700; font-size: 13.5px; }
.rel-go svg { width: 16px; height: 16px; transition: transform .25s var(--ease); }
.rel-card:hover .rel-go svg { transform: translateX(4px); }

/* ---- Related v2 (2026-07-18): giá thuê/mua thấp nhất + badge khuyến mãi ---- */
/* Hàng tagline chiếm 1fr → khối giá + nút luôn thẳng hàng đáy giữa các card */
.rel-card { position: relative; grid-template-rows: auto auto 1fr auto auto; align-content: stretch; }
.rel-prices { display: grid; gap: 5px; padding-top: 10px; border-top: 1px dashed var(--line); align-self: end; }
.rel-price { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.rel-price em { font-style: normal; font-size: 10.5px; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); flex: 0 0 auto; }
.rel-price b { font-size: 14.5px; font-weight: 800; color: var(--aqua-dark); letter-spacing: -.01em; white-space: nowrap; }
.rel-price-buy b { color: var(--ink); }
/* Giá gốc gạch đỏ — y hệt .price-old ở khối báo giá, cỡ nhỏ cho card */
.rel-vals { display: grid; justify-items: end; gap: 1px; }
.rel-vals s { font-size: 11.5px; font-weight: 700; color: #9aa8ae; text-decoration: line-through; text-decoration-color: #ff2d78; text-decoration-thickness: 2px; white-space: nowrap; }
/* Badge "Đang khuyến mãi" — nổi nửa ngoài mép trên card, gradient hồng promo (hex sẵn có),
   pulse ring + glint quét (tái dùng sealGlint) + icon quà bob. Reduced-motion tự tắt (global). */
.rel-promo {
  position: absolute; top: -12px; right: 12px; z-index: 3;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: var(--r-pill); white-space: nowrap;
  background: linear-gradient(120deg, #ff2d78 0%, #ff6a3d 100%);
  color: #fff; font-size: 10.5px; font-weight: 900; letter-spacing: .05em; text-transform: uppercase;
  border: 2px solid #fff; overflow: hidden; isolation: isolate;
  box-shadow: 0 10px 22px rgba(255, 45, 120, .42);
  animation: relPromoPulse 2.4s ease-in-out infinite;
}
.rel-promo svg { width: 13px; height: 13px; flex: 0 0 auto; animation: giftBob 2s ease-in-out infinite; }
.rel-promo::after {
  content: ""; position: absolute; inset: -40%; z-index: -1;
  background: linear-gradient(115deg, transparent 42%, rgba(255, 255, 255, .75) 50%, transparent 58%);
  background-size: 250% 250%; animation: sealGlint 3.2s ease-in-out infinite;
}
@keyframes relPromoPulse {
  0%, 100% { transform: rotate(2deg) scale(1); box-shadow: 0 10px 22px rgba(255, 45, 120, .42), 0 0 0 0 rgba(255, 45, 120, .4); }
  50%      { transform: rotate(-1deg) scale(1.05); box-shadow: 0 12px 26px rgba(255, 45, 120, .5), 0 0 0 9px rgba(255, 45, 120, 0); }
}