/* =====================================================================
   Z-Agency landing — design system
   Palette derived from the logo gradient (deep navy → sky blue)
   ===================================================================== */
:root {
  --navy-900: #081c30;
  --navy-800: #0b2a45;
  --navy-700: #0e3a5e;
  --blue-600: #1a5c8e;
  --blue-500: #1f6fa8;
  --blue-400: #2e8bc9;
  --sky-400: #3a9bd6;
  --sky-300: #6fb8e6;
  --sky-200: #b5dbf3;
  --sky-100: #dceef9;
  --sky-50: #eef6fc;

  --bg: #f7fafd;
  --bg-soft: #eef4f9;
  --white: #ffffff;
  --text: #0b2239;
  --text-2: #2c4458;
  --muted: #5b7084;
  --line: #dbe5ee;
  --line-2: #c9d8e4;

  --grad: linear-gradient(135deg, var(--navy-700) 0%, var(--blue-500) 48%, var(--sky-400) 100%);
  --grad-text: linear-gradient(100deg, var(--blue-600) 0%, var(--sky-400) 100%);
  --grad-dark: radial-gradient(120% 100% at 100% 0%, #15507f 0%, var(--navy-800) 45%, var(--navy-900) 100%);

  --shadow-sm: 0 1px 2px rgba(11, 34, 57, .06), 0 2px 8px rgba(11, 34, 57, .05);
  --shadow-md: 0 6px 20px rgba(11, 34, 57, .08), 0 2px 6px rgba(11, 34, 57, .05);
  --shadow-lg: 0 24px 60px rgba(11, 34, 57, .14), 0 8px 20px rgba(11, 34, 57, .06);
  --shadow-blue: 0 14px 34px rgba(31, 111, 168, .32);

  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;

  --font: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --container: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --section: clamp(76px, 10vw, 140px);
  --header-h: 76px;

  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --ease-io: cubic-bezier(.65, 0, .35, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, p { margin: 0; }
svg:not([fill]) { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
:focus-visible { outline: 3px solid var(--sky-400); outline-offset: 3px; border-radius: 6px; }
::selection { background: var(--sky-200); color: var(--navy-900); }

.container { width: min(100% - var(--gutter) * 2, var(--container)); margin-inline: auto; }
.section { padding-block: var(--section); position: relative; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--grad-dark); color: #fff; }
.section--dark .lead { color: rgba(255,255,255,.72); }
.section--dark .h2 em { background: linear-gradient(100deg, #8ccbf0 0%, #d7edfb 100%); -webkit-background-clip: text; background-clip: text; }

/* ---------- typography ---------- */
.h2 {
  font-size: clamp(30px, 4.4vw, 54px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -.025em;
  text-wrap: balance;
}
.h2 em, .hero__title em {
  font-style: normal;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead { font-size: clamp(16px, 1.3vw, 19px); color: var(--muted); max-width: 60ch; text-wrap: pretty; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase;
  color: var(--blue-500); margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 26px; height: 3px; border-radius: 3px; background: var(--grad); }
.eyebrow--light { color: #8ccbf0; }
.eyebrow--light::before { background: #8ccbf0; }
.eyebrow__pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--sky-400); box-shadow: 0 0 0 0 rgba(58,155,214,.6); animation: pulse 2s infinite; }
.eyebrow:has(.eyebrow__pulse)::before { display: none; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(58,155,214,.55) } 70% { box-shadow: 0 0 0 10px rgba(58,155,214,0) } 100% { box-shadow: 0 0 0 0 rgba(58,155,214,0) } }

.section__head { margin-bottom: clamp(40px, 6vw, 72px); }
.section__head--center { text-align: center; }
.section__head--center .eyebrow { justify-content: center; }
.section__head--center .lead { margin: 18px auto 0; }
.section__head--split { display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px 64px; align-items: end; }
.section__head--split .lead { padding-bottom: 6px; }
@media (max-width: 860px) { .section__head--split { grid-template-columns: 1fr; gap: 16px; } }
.section__head .lead, .h2 + .lead { margin-top: 18px; }

/* ---------- buttons ---------- */
.btn {
  --bg: var(--navy-700);
  position: relative; isolation: isolate;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 24px; border-radius: 999px;
  font-weight: 700; font-size: 15px; line-height: 1; white-space: nowrap;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), background .3s;
  will-change: transform;
}
.btn svg { width: 18px; height: 18px; flex: 0 0 auto; transition: transform .35s var(--ease-out); }
.btn:hover svg:last-child { transform: translateX(4px); }
.btn--primary { color: #fff; background: var(--grad); box-shadow: var(--shadow-blue); overflow: hidden; }
.btn--primary::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(135deg, var(--blue-500), var(--navy-700));
  opacity: 0; transition: opacity .4s;
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px rgba(31,111,168,.4); }
.btn--primary:hover::after { opacity: 1; }
.btn--primary:active { transform: translateY(0) scale(.98); }
.btn--ghost { color: var(--navy-700); background: #fff; border: 1.5px solid var(--line-2); box-shadow: var(--shadow-sm); }
.btn--ghost:hover { border-color: var(--sky-400); color: var(--blue-500); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.section--dark .btn--ghost { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.22); color: #fff; }
.section--dark .btn--ghost:hover { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.5); }
.btn--sm { padding: 11px 18px; font-size: 14px; }
.btn--lg { padding: 18px 30px; font-size: 16px; }
.btn--block { width: 100%; }
.link-arrow { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; color: var(--blue-500); }
.link-arrow svg { width: 18px; height: 18px; transition: transform .3s var(--ease-out); }
.link-arrow:hover svg { transform: translateX(5px); }
.link-arrow--light { color: #fff; }

/* ---------- intro ---------- */
.intro {
  position: fixed; inset: 0; z-index: 1000;
  background: #fff;
  display: grid; place-content: center; gap: 22px; text-align: center;
  transition: opacity .6s var(--ease-io), visibility .6s;
}
.intro.is-done { opacity: 0; visibility: hidden; pointer-events: none; }
.intro__mark img { width: clamp(72px, 10vw, 120px); height: auto; margin: 0 auto; filter: drop-shadow(0 20px 40px rgba(31,111,168,.3)); animation: introMark 1.1s var(--ease-out) both; }
@keyframes introMark { from { opacity: 0; transform: translateY(24px) scale(.86) rotate(-6deg); } to { opacity: 1; transform: none; } }
.intro__word { display: flex; align-items: center; gap: 12px; justify-content: center; font-weight: 800; letter-spacing: .32em; font-size: 12px; color: var(--navy-700); }
.intro__word span { animation: introWord .7s var(--ease-out) both; }
.intro__word span:nth-child(3) { animation-delay: .15s; }
.intro__word span:nth-child(5) { animation-delay: .3s; }
.intro__word i { width: 18px; height: 2px; background: var(--sky-400); transform-origin: left; animation: introLine .5s var(--ease-out) .35s both; }
@keyframes introWord { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes introLine { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.no-intro .intro { display: none; }

/* ---------- header ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  transition: transform .5s var(--ease-out), background .4s, box-shadow .4s, height .4s;
  background: transparent;
}
.header.is-scrolled { background: rgba(255,255,255,.82); backdrop-filter: saturate(160%) blur(16px); -webkit-backdrop-filter: saturate(160%) blur(16px); box-shadow: 0 1px 0 rgba(11,34,57,.06), 0 10px 30px rgba(11,34,57,.05); height: 66px; }
.header.is-hidden { transform: translateY(-100%); }
.header__inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand img { width: 150px; height: auto; }
.nav { display: flex; gap: 6px; }
.nav a { position: relative; padding: 10px 14px; font-size: 14.5px; font-weight: 600; color: var(--text-2); border-radius: 999px; transition: color .3s, background .3s; }
.nav a:hover, .nav a.is-active { color: var(--blue-500); background: var(--sky-50); }
.header__cta { display: flex; align-items: center; gap: 10px; }
.header__phone { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 14.5px; color: var(--navy-700); padding: 10px 12px; border-radius: 999px; transition: background .3s; }
.header__phone svg { width: 18px; height: 18px; color: var(--sky-400); }
.header__phone:hover { background: var(--sky-50); }
.burger { display: none; width: 44px; height: 44px; border-radius: 12px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
.burger span { width: 22px; height: 2px; background: var(--navy-700); border-radius: 2px; transition: transform .4s var(--ease-out), opacity .3s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
@media (max-width: 1080px) {
  .nav { display: none; }
  .header__phone span { display: none; }
}
@media (max-width: 720px) {
  .header__phone { display: none; }
  .header__cta .btn { display: none; }
  .burger { display: flex; }
  .brand img { width: 128px; }
}

/* ---------- mobile menu ---------- */
.mobile-menu {
  position: fixed; inset: 0; z-index: 90;
  background: #fff;
  padding: calc(var(--header-h) + 16px) var(--gutter) 32px;
  display: flex; flex-direction: column; justify-content: space-between;
  clip-path: circle(0 at calc(100% - 44px) 38px);
  transition: clip-path .7s var(--ease-io);
  visibility: hidden;
}
.mobile-menu.is-open { clip-path: circle(150% at calc(100% - 44px) 38px); visibility: visible; }
.mobile-menu__nav a { display: flex; align-items: baseline; gap: 16px; padding: 14px 0; font-size: clamp(26px, 7vw, 34px); font-weight: 800; letter-spacing: -.02em; color: var(--navy-800); border-bottom: 1px solid var(--line); opacity: 0; transform: translateY(16px); transition: opacity .5s, transform .5s var(--ease-out); }
.mobile-menu.is-open .mobile-menu__nav a { opacity: 1; transform: none; }
.mobile-menu__nav a:nth-child(n) { transition-delay: calc(.15s + var(--i, 0) * .05s); }
.mobile-menu__nav a em { font-style: normal; font-size: 12px; font-weight: 700; color: var(--sky-400); letter-spacing: .1em; }
.mobile-menu__foot { display: grid; gap: 16px; }
.mobile-menu__contact { display: flex; flex-wrap: wrap; gap: 8px 20px; font-weight: 600; color: var(--muted); font-size: 14px; }

/* ---------- hero ---------- */
.hero { position: relative; padding-top: calc(var(--header-h) + clamp(40px, 7vw, 96px)); padding-bottom: clamp(48px, 6vw, 80px); overflow: hidden; }
.hero__bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero__glow { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .6; }
.hero__glow--1 { width: 60vw; height: 60vw; max-width: 760px; max-height: 760px; right: -16vw; top: -18vw; background: radial-gradient(circle, rgba(111,184,230,.55) 0%, rgba(111,184,230,0) 65%); }
.hero__glow--2 { width: 40vw; height: 40vw; max-width: 520px; max-height: 520px; left: -14vw; bottom: -10vw; background: radial-gradient(circle, rgba(31,111,168,.26) 0%, rgba(31,111,168,0) 65%); }
.hero__grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(14,58,94,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(14,58,94,.06) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 75%);
}
.hero__inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
.hero__title { font-size: clamp(38px, 5.6vw, 72px); line-height: 1.02; font-weight: 800; letter-spacing: -.035em; margin: 6px 0 24px; text-wrap: balance; }
.hero__lead { font-size: clamp(17px, 1.45vw, 20px); color: var(--text-2); max-width: 54ch; }
.hero__lead strong { color: var(--navy-700); font-weight: 700; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero__trust { display: flex; flex-wrap: wrap; gap: 10px 24px; margin-top: 26px; font-size: 14px; color: var(--muted); font-weight: 500; }
.hero__trust li { display: inline-flex; align-items: center; gap: 8px; }
.hero__trust svg { width: 16px; height: 16px; color: var(--sky-400); stroke-width: 3; }

/* hero visual stage */
.hero__visual { position: relative; min-height: 480px; }
.zstage { position: relative; width: 100%; aspect-ratio: 1; max-width: 560px; margin-inline: auto; }
.zstage__mark { position: absolute; inset: 14%; display: grid; place-items: center; will-change: transform; }
.zstage__mark img { width: 100%; height: auto; filter: drop-shadow(0 40px 60px rgba(14,58,94,.35)) drop-shadow(0 8px 16px rgba(14,58,94,.12)); animation: floatY 7s ease-in-out infinite; }
@keyframes floatY { 0%, 100% { transform: translateY(0) } 50% { transform: translateY(-14px) } }
.zstage__ghost { position: absolute; opacity: .09; pointer-events: none; }
.zstage__ghost img { width: 100%; filter: grayscale(1) brightness(.6); }
.zstage__ghost--a { width: 62%; left: -10%; top: -6%; transform: rotate(-8deg); }
.zstage__ghost--b { width: 48%; right: -8%; bottom: -4%; transform: rotate(10deg); }
.zstage__ring { position: absolute; inset: 4%; border-radius: 50%; border: 1px dashed rgba(31,111,168,.25); animation: spin 60s linear infinite; }
.zstage__ring::before { content: ""; position: absolute; top: -5px; left: 50%; width: 10px; height: 10px; border-radius: 50%; background: var(--sky-400); box-shadow: 0 0 0 6px rgba(58,155,214,.18); }
@keyframes spin { to { transform: rotate(360deg) } }

.fcard {
  position: absolute; z-index: 2;
  background: rgba(255,255,255,.86); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,.9);
  border-radius: 18px; padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  will-change: transform;
}
.fcard__label { font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.fcard__value { font-size: 34px; font-weight: 800; letter-spacing: -.03em; line-height: 1.05; margin-top: 4px; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.fcard__value small { font-size: .6em; font-weight: 700; }
.fcard__meta { font-size: 12.5px; color: var(--text-2); margin-top: 4px; font-weight: 500; }
.fcard--1 { left: -6%; top: 10%; animation: floatY 6s ease-in-out infinite .4s; }
.fcard--2 { right: -4%; top: 26%; animation: floatY 8s ease-in-out infinite 1.1s; }
.fcard--3 { left: 2%; bottom: 10%; animation: floatY 7s ease-in-out infinite .8s; }
.fcard--4 { right: 0; bottom: 4%; display: flex; align-items: center; gap: 12px; padding: 12px 16px; animation: floatY 9s ease-in-out infinite 1.6s; }
.fcard__avatars { display: flex; }
.fcard__avatars img { width: 34px; height: 34px; border-radius: 50%; object-fit: cover; border: 2px solid #fff; margin-left: -10px; background: #fff; box-shadow: var(--shadow-sm); }
.fcard__avatars img:first-child { margin-left: 0; }

.hero__stats {
  position: relative; z-index: 1;
  margin-top: clamp(44px, 6vw, 80px);
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.stat { padding: 24px 28px; border-left: 1px solid var(--line); }
.stat:first-child { border-left: 0; }
.stat__num { font-size: clamp(28px, 3vw, 40px); font-weight: 800; letter-spacing: -.03em; line-height: 1; color: var(--navy-700); display: flex; align-items: baseline; gap: 6px; }
.stat__num i { font-style: normal; font-size: .45em; font-weight: 700; color: var(--sky-400); }
.stat__label { font-size: 13.5px; color: var(--muted); margin-top: 8px; font-weight: 500; }
.hero__scroll { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); width: 26px; height: 42px; border: 2px solid var(--line-2); border-radius: 14px; display: none; }
.hero__scroll span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--sky-400); animation: scrollHint 1.8s infinite; }
@keyframes scrollHint { 0% { transform: translateY(0); opacity: 1 } 80% { transform: translateY(14px); opacity: 0 } 100% { opacity: 0 } }

@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; gap: 24px; }
  .hero__visual { min-height: 0; order: 0; margin-top: 12px; }
  .zstage { max-width: 380px; }
  .fcard__value { font-size: 26px; }
  .fcard { padding: 10px 14px; border-radius: 14px; }
  .fcard--1 { left: -4%; top: 4%; }
  .fcard--2 { right: -6%; top: 20%; }
  .fcard--3 { left: -2%; bottom: 8%; }
  .fcard--4 { right: -2%; bottom: -2%; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }
}
@media (max-width: 600px) {
  .hero { padding-top: calc(var(--header-h) + 8px); }
  .zstage { max-width: 290px; }
  .zstage__ring { display: none; }
  .eyebrow { font-size: 11px; letter-spacing: .14em; }
  .hero__actions .btn { width: 100%; }
  .fcard__meta { display: none; }
  .fcard--4 .fcard__meta { display: block; }
  .stat { padding: 18px 18px; }
}

/* ---------- clients marquee ---------- */
.clients { padding: clamp(28px, 4vw, 48px) 0 clamp(36px, 5vw, 64px); }
.clients__title { text-align: center; font-size: 13.5px; font-weight: 600; color: var(--muted); letter-spacing: .02em; margin-bottom: 26px; text-wrap: balance; }
.marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee__track { display: flex; width: max-content; animation: marquee 48s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__list { display: flex; gap: 16px; padding-right: 16px; }
.marquee__list li { width: 150px; height: 84px; display: grid; place-items: center; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 12px; transition: transform .35s var(--ease-out), box-shadow .35s; }
.marquee__list li:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.marquee__list img { max-height: 56px; width: auto; max-width: 118px; object-fit: contain; filter: grayscale(1) opacity(.72); transition: filter .4s; }
.marquee__list li:hover img { filter: none; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- pain ---------- */
.pain__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pain__card { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 30px 28px; transition: transform .45s var(--ease-out), box-shadow .45s, border-color .3s; overflow: hidden; }
.pain__card::before { content: ""; position: absolute; inset: 0; background: radial-gradient(80% 60% at 0% 0%, rgba(111,184,230,.18), transparent 60%); opacity: 0; transition: opacity .5s; }
.pain__card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--sky-200); }
.pain__card:hover::before { opacity: 1; }
.pain__icon { width: 50px; height: 50px; border-radius: 14px; display: grid; place-items: center; background: var(--sky-50); color: var(--blue-500); margin-bottom: 20px; position: relative; }
.pain__icon svg { width: 24px; height: 24px; }
.pain__card h3 { font-size: 19px; font-weight: 700; letter-spacing: -.01em; margin-bottom: 10px; position: relative; }
.pain__card p { color: var(--muted); font-size: 15px; position: relative; }
.pain__card--cta { background: var(--grad-dark); color: #fff; border: 0; display: flex; flex-direction: column; justify-content: space-between; gap: 24px; }
.pain__card--cta::before { display: none; }
.pain__quote { font-size: 18px; line-height: 1.5; font-weight: 500; color: rgba(255,255,255,.85); }
.pain__quote strong { color: #fff; }
.pain__card--cta .link-arrow { color: #8ccbf0; }
@media (max-width: 960px) { .pain__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .pain__grid { grid-template-columns: 1fr; gap: 14px; } .pain__card { padding: 24px 22px; } }

/* ---------- solution ---------- */
.solution { overflow: hidden; }
.solution__bg { position: absolute; inset: 0; pointer-events: none; background-image: radial-gradient(rgba(255,255,255,.08) 1px, transparent 1px); background-size: 28px 28px; mask-image: radial-gradient(ellipse 60% 70% at 80% 20%, #000, transparent 70%); -webkit-mask-image: radial-gradient(ellipse 60% 70% at 80% 20%, #000, transparent 70%); }
.pillars { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pillars__line { position: absolute; left: 6%; right: 6%; top: 30px; height: 2px; background: rgba(255,255,255,.1); border-radius: 2px; overflow: hidden; }
.pillars__line i { display: block; height: 100%; width: 100%; background: linear-gradient(90deg, #8ccbf0, #fff); transform: scaleX(0); transform-origin: left; }
.pillar { position: relative; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: var(--r-lg); padding: 28px 28px 30px; backdrop-filter: blur(6px); transition: background .4s, transform .45s var(--ease-out), border-color .4s; }
.pillar:hover { background: rgba(255,255,255,.09); transform: translateY(-6px); border-color: rgba(140,203,240,.4); }
.pillar__num { width: 60px; height: 60px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; font-size: 17px; background: var(--grad); color: #fff; box-shadow: 0 10px 24px rgba(0,0,0,.25), inset 0 0 0 4px var(--navy-800); margin-bottom: 26px; }
.pillar h3 { font-size: 22px; font-weight: 800; letter-spacing: -.015em; margin-bottom: 10px; }
.pillar p { color: rgba(255,255,255,.72); font-size: 15px; margin-bottom: 18px; }
.pillar ul { display: grid; gap: 8px; }
.pillar li { position: relative; padding-left: 20px; font-size: 14.5px; font-weight: 500; color: rgba(255,255,255,.88); }
.pillar li::before { content: ""; position: absolute; left: 0; top: .55em; width: 10px; height: 10px; border-radius: 3px; background: linear-gradient(135deg, #8ccbf0, var(--sky-400)); transform: rotate(45deg); }
.solution__tagline { margin-top: clamp(36px, 5vw, 56px); display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 10px 14px; font-weight: 700; letter-spacing: .14em; font-size: 12.5px; text-transform: uppercase; color: rgba(255,255,255,.6); }
.solution__tagline i { color: #8ccbf0; font-style: normal; }
@media (max-width: 900px) { .pillars { grid-template-columns: 1fr; } .pillars__line { display: none; } }

/* ---------- services bento ---------- */
.bento { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.bento__item { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 26px 24px; min-height: 230px; display: flex; flex-direction: column; transform-style: preserve-3d; transition: box-shadow .45s, border-color .3s; overflow: hidden; }
.bento__item:hover { box-shadow: var(--shadow-lg); border-color: var(--sky-200); }
.bento__item--wide { grid-column: span 2; }
.bento__item--accent { background: var(--grad); color: #fff; border: 0; }
.bento__item--accent .bento__icon { background: rgba(255,255,255,.16); color: #fff; }
.bento__item--accent p { color: rgba(255,255,255,.85); }
.bento__item--accent .link-arrow { margin-top: auto; padding-top: 14px; }
.bento__icon { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; background: var(--sky-50); color: var(--blue-500); margin-bottom: 18px; transition: transform .4s var(--ease-out), background .3s, color .3s; }
.bento__icon svg { width: 23px; height: 23px; }
.bento__item:hover .bento__icon { transform: translateY(-3px) rotate(-6deg); background: var(--grad); color: #fff; }
.bento__item--accent:hover .bento__icon { background: #fff; color: var(--blue-500); }
.bento__item h3 { font-size: 18px; font-weight: 700; letter-spacing: -.01em; margin-bottom: 8px; }
.bento__item p { font-size: 14.5px; color: var(--muted); }
.bento__thumbs { margin-top: auto; padding-top: 18px; display: flex; gap: 10px; }
.bento__thumbs img { width: 33%; aspect-ratio: 4/3; object-fit: cover; border-radius: 12px; transition: transform .5s var(--ease-out); }
.bento__item:hover .bento__thumbs img:nth-child(1) { transform: rotate(-3deg) translateY(-4px); }
.bento__item:hover .bento__thumbs img:nth-child(2) { transform: translateY(-8px); }
.bento__item:hover .bento__thumbs img:nth-child(3) { transform: rotate(3deg) translateY(-4px); }
@media (max-width: 1024px) { .bento { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 760px) { .bento { grid-template-columns: repeat(2, 1fr); gap: 12px; } .bento__item { padding: 20px 18px; min-height: 0; } .bento__item h3 { font-size: 16px; } .bento__item p { font-size: 13.5px; } .bento__thumbs { display: none; } }
@media (max-width: 420px) { .bento__item--wide, .bento__item--accent { grid-column: span 2; } }

/* ---------- cases (stacked) ---------- */
.cases { overflow: clip; }
.cases__stack { position: relative; }
.case { position: sticky; top: calc(var(--header-h) + 12px); margin-bottom: 24px; will-change: transform; }
.case__inner {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(28px, 4vw, 64px); align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-xl);
  padding: clamp(28px, 4vw, 56px);
  box-shadow: 0 30px 80px rgba(11,34,57,.12);
  min-height: min(78vh, 720px);
  transform-origin: top center;
}
.case:nth-child(2) .case__inner { background: #f9fcfe; }
.case:nth-child(3) .case__inner { background: #fff; }
.case:nth-child(4) .case__inner { background: #f9fcfe; }
.case__top { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.case__index { font-size: 13px; font-weight: 800; letter-spacing: .1em; color: #fff; background: var(--grad); padding: 6px 10px; border-radius: 8px; }
.case__tag { font-size: 12.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--blue-500); }
.case__title { font-size: clamp(26px, 3vw, 38px); font-weight: 800; letter-spacing: -.025em; line-height: 1.1; margin-bottom: 14px; text-wrap: balance; }
.case__desc { color: var(--muted); font-size: 15.5px; max-width: 56ch; }
.case__metrics { display: flex; flex-wrap: wrap; align-items: stretch; gap: 10px; margin: 26px 0 20px; }
.metric { flex: 1 1 130px; background: var(--sky-50); border: 1px solid var(--sky-100); border-radius: 16px; padding: 14px 16px; }
.metric--arrow { flex: 0 0 auto; display: grid; place-items: center; background: none; border: 0; padding: 0 2px; color: var(--sky-400); }
.metric--arrow svg { width: 22px; height: 22px; }
.metric--hero { background: var(--grad); border: 0; color: #fff; box-shadow: var(--shadow-blue); }
.metric__v { font-size: clamp(26px, 2.6vw, 34px); font-weight: 800; letter-spacing: -.03em; line-height: 1; color: var(--navy-700); }
.metric--hero .metric__v { color: #fff; }
.metric__l { font-size: 12.5px; color: var(--muted); margin-top: 6px; font-weight: 500; line-height: 1.35; }
.metric--hero .metric__l { color: rgba(255,255,255,.82); }
.case__facts { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 20px; font-size: 14px; color: var(--text-2); }
.case__facts li { position: relative; padding-left: 16px; }
.case__facts li::before { content: ""; position: absolute; left: 0; top: .6em; width: 7px; height: 7px; border-radius: 50%; background: var(--sky-400); }
.case__facts b { color: var(--navy-700); font-weight: 700; }
.case__chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.case__chips span { font-size: 12.5px; font-weight: 600; padding: 7px 12px; border-radius: 999px; background: #fff; border: 1px solid var(--line-2); color: var(--text-2); }

.collage { position: relative; aspect-ratio: 1; max-width: 520px; margin-inline: auto; }
.collage img { position: absolute; object-fit: cover; border-radius: 18px; box-shadow: var(--shadow-lg); border: 4px solid #fff; transition: transform .6s var(--ease-out); }
.collage__badge { position: absolute; z-index: 3; background: var(--navy-800); color: #fff; padding: 10px 16px; border-radius: 999px; font-size: 13px; font-weight: 600; box-shadow: var(--shadow-lg); display: flex; gap: 6px; align-items: baseline; }
.collage__badge b { font-size: 18px; font-weight: 800; color: #8ccbf0; }
/* sora */
.collage--sora .collage__a { left: 0; top: 6%; width: 52%; aspect-ratio: 371/480; z-index: 2; }
.collage--sora .collage__b { right: 2%; top: 0; width: 42%; aspect-ratio: 375/692; z-index: 1; }
.collage--sora .collage__c { left: 28%; bottom: 0; width: 50%; aspect-ratio: 548/684; z-index: 3; }
.collage--sora .collage__badge { right: 0; top: 54%; }
/* thien van */
.collage--tv .collage__a { left: 0; top: 0; width: 56%; aspect-ratio: 672/1008; z-index: 2; }
.collage--tv .collage__b { right: 0; top: 12%; width: 50%; aspect-ratio: 640/960; z-index: 1; }
.waves { position: absolute; left: 8%; right: 8%; bottom: 0; z-index: 3; height: 92px; background: rgba(255,255,255,.9); backdrop-filter: blur(10px); border: 1px solid var(--line); border-radius: 16px; display: flex; align-items: flex-end; gap: 6px; padding: 10px 14px 26px; box-shadow: var(--shadow-lg); }
.waves span { flex: 1; height: calc(var(--h) * 100%); border-radius: 4px 4px 0 0; background: linear-gradient(180deg, var(--sky-400), var(--blue-500)); transform: scaleY(0); transform-origin: bottom; }
.waves em { position: absolute; left: 14px; bottom: 7px; font-style: normal; font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
/* van minh */
.collage--vm { aspect-ratio: 1200/997; }
.collage--vm .collage__a { inset: 0; width: 100%; height: 100%; }
.collage__badge--b { left: 6%; bottom: 6%; }
/* rieu viet */
.collage--rv { aspect-ratio: 1; }
.collage--rv .collage__a { left: 0; top: 4%; width: 100%; aspect-ratio: 1200/444; z-index: 1; }
.collage--rv .collage__b { left: 6%; bottom: 0; width: 42%; aspect-ratio: 464/600; z-index: 2; }
.collage--rv .collage__c { right: 6%; bottom: 4%; width: 42%; aspect-ratio: 435/600; z-index: 2; }
.case:hover .collage img { transform: translateY(-4px); }

.revchart { display: flex; align-items: flex-end; gap: 14px; height: 150px; margin: 6px 0 18px; padding: 0 4px; border-bottom: 1px solid var(--line); }
.revchart__bar { position: relative; flex: 1; height: calc(var(--v) * 100%); background: linear-gradient(180deg, var(--sky-300), var(--sky-200)); border-radius: 10px 10px 0 0; transform: scaleY(0); transform-origin: bottom; }
.revchart__bar--hi { background: var(--grad); }
.revchart__bar b { position: absolute; left: 0; right: 0; top: -26px; text-align: center; font-size: 14px; font-weight: 800; color: var(--navy-700); }
.revchart__bar span { position: absolute; left: 0; right: 0; bottom: -24px; text-align: center; font-size: 11px; color: var(--muted); font-weight: 600; white-space: nowrap; }
.revchart + .case__chips { margin-top: 36px; }
.cases__foot { margin-top: clamp(40px, 6vw, 72px); text-align: center; display: grid; justify-items: center; gap: 18px; }
.cases__foot p { font-size: clamp(18px, 2vw, 24px); font-weight: 700; letter-spacing: -.01em; color: var(--navy-700); }

@media (max-width: 960px) {
  .case { position: relative; top: auto; }
  .case__inner { grid-template-columns: 1fr; min-height: 0; }
  .case__media { order: -1; }
  .collage { max-width: 420px; }
}
@media (max-width: 560px) {
  .case__inner { padding: 20px 18px 24px; border-radius: 22px; }
  .case__facts { grid-template-columns: 1fr; }
  .metric { flex-basis: 110px; padding: 12px; }
  .metric--arrow { display: none; }
  .collage { max-width: 100%; }
  .waves { height: 76px; }
}

/* ---------- process ---------- */
.steps { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.steps__line { position: absolute; left: 0; right: 0; top: 11px; height: 2px; background: var(--line-2); }
.steps__line i { display: block; height: 100%; background: var(--grad); transform: scaleX(0); transform-origin: left; }
.step { position: relative; padding-top: 36px; }
.step__dot { position: absolute; left: 0; top: 0; width: 24px; height: 24px; border-radius: 50%; background: #fff; border: 2px solid var(--line-2); box-shadow: 0 0 0 6px var(--bg-soft); transition: border-color .4s, background .4s; }
.step.is-on .step__dot { border-color: var(--sky-400); background: var(--sky-400); box-shadow: 0 0 0 6px var(--bg-soft), 0 0 0 10px rgba(58,155,214,.18); }
.step__num { font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--sky-400); margin-bottom: 8px; }
.step h3 { font-size: 20px; font-weight: 800; letter-spacing: -.015em; margin-bottom: 10px; }
.step p { color: var(--muted); font-size: 14.5px; }
.step__time { display: inline-block; margin-top: 14px; font-size: 12.5px; font-weight: 700; color: var(--blue-500); background: #fff; border: 1px solid var(--sky-100); padding: 6px 12px; border-radius: 999px; }
@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; gap: 28px; padding-left: 34px; }
  .steps__line { left: 11px; right: auto; top: 0; bottom: 0; width: 2px; height: auto; }
  .steps__line i { width: 100%; height: 100%; transform: scaleY(0); transform-origin: top; }
  .step { padding-top: 0; }
  .step__dot { left: -34px; top: 2px; }
}

/* ---------- about ---------- */
.about__grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(36px, 6vw, 88px); align-items: center; }
.about__media { position: relative; }
.about__photo { border-radius: var(--r-xl); overflow: hidden; aspect-ratio: 4/4.6; box-shadow: var(--shadow-lg); }
.about__photo img { width: 100%; height: 115%; object-fit: cover; will-change: transform; }
.about__badge { position: absolute; left: -18px; bottom: 16%; display: flex; align-items: center; gap: 12px; background: #fff; padding: 12px 18px 12px 12px; border-radius: 18px; box-shadow: var(--shadow-lg); border: 1px solid var(--line); }
.about__badge img { width: 44px; height: 44px; }
.about__badge b { display: block; font-size: 15px; font-weight: 800; color: var(--navy-700); }
.about__badge span { font-size: 12px; color: var(--muted); line-height: 1.3; font-weight: 500; }
.about__quote { position: absolute; right: -14px; top: -18px; max-width: 260px; margin: 0; background: var(--grad); color: #fff; padding: 18px 20px; border-radius: 18px 18px 18px 4px; font-size: 15px; font-weight: 600; line-height: 1.45; box-shadow: var(--shadow-blue); }
.advantages { margin-top: 30px; display: grid; gap: 10px; }
.adv { border: 1px solid var(--line); border-radius: 16px; background: #fff; overflow: hidden; transition: border-color .3s, box-shadow .3s; }
.adv[open] { border-color: var(--sky-200); box-shadow: var(--shadow-md); }
.adv summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 16px; padding: 16px 18px; font-weight: 700; font-size: 16px; }
.adv summary::-webkit-details-marker { display: none; }
.adv__n { font-size: 12px; font-weight: 800; color: var(--sky-400); letter-spacing: .1em; }
.adv summary i { margin-left: auto; width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--line-2); position: relative; flex: 0 0 auto; transition: transform .4s var(--ease-out), background .3s, border-color .3s; }
.adv summary i::before, .adv summary i::after { content: ""; position: absolute; left: 50%; top: 50%; width: 12px; height: 2px; background: var(--navy-700); transform: translate(-50%, -50%); transition: transform .4s; }
.adv summary i::after { transform: translate(-50%, -50%) rotate(90deg); }
.adv[open] summary i { background: var(--navy-700); border-color: var(--navy-700); }
.adv[open] summary i::before, .adv[open] summary i::after { background: #fff; }
.adv[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.adv p { padding: 0 18px 18px 50px; color: var(--muted); font-size: 14.5px; }
@media (max-width: 900px) {
  .about__grid { grid-template-columns: 1fr; }
  .about__media { max-width: 520px; margin-inline: auto; width: 100%; padding-top: 30px; }
  .about__photo { aspect-ratio: 4/3.4; }
  .about__quote { right: 0; top: -6px; max-width: 240px; font-size: 14px; }
  .about__badge { left: 0; bottom: -18px; }
}

/* ---------- ecosystem ---------- */
.eco__map { display: grid; grid-template-columns: 1fr auto 1fr; gap: clamp(20px, 4vw, 56px); align-items: center; }
.eco__col h4 { font-size: 12.5px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--blue-500); margin-bottom: 14px; }
.eco__col ul { display: flex; flex-wrap: wrap; gap: 8px; }
.eco__col--right { text-align: right; }
.eco__col--right ul { justify-content: flex-end; }
.eco__col li { background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 9px 14px; font-size: 14px; font-weight: 600; color: var(--text-2); transition: transform .35s var(--ease-out), border-color .3s, color .3s; }
.eco__col li:hover { transform: translateY(-3px); border-color: var(--sky-300); color: var(--blue-500); }
.eco__center { position: relative; width: 220px; height: 220px; display: grid; place-items: center; }
.eco__center img { position: relative; z-index: 2; width: 96px; height: 96px; filter: drop-shadow(0 16px 30px rgba(14,58,94,.3)); }
.eco__orbit { position: absolute; inset: 0; }
.eco__orbit i { position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(31,111,168,.22); }
.eco__orbit i:nth-child(2) { inset: 22px; border-style: dashed; animation: spin 40s linear infinite; }
.eco__orbit i:nth-child(3) { inset: 46px; border-color: rgba(31,111,168,.35); }
.eco__orbit i:nth-child(2)::before { content: ""; position: absolute; top: -5px; left: 50%; width: 10px; height: 10px; border-radius: 50%; background: var(--sky-400); }
@media (max-width: 800px) {
  .eco__map { grid-template-columns: 1fr; text-align: center; }
  .eco__col--right { text-align: center; }
  .eco__col ul, .eco__col--right ul { justify-content: center; }
  .eco__center { margin-inline: auto; width: 180px; height: 180px; }
}

/* ---------- faq ---------- */
.faq__grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.faq__head { position: sticky; top: calc(var(--header-h) + 24px); }
.faq__head .btn { margin-top: 26px; }
.faq__list { display: grid; gap: 10px; }
.qa { border: 1px solid var(--line); border-radius: 16px; background: #fff; transition: border-color .3s, box-shadow .3s; }
.qa[open] { border-color: var(--sky-200); box-shadow: var(--shadow-md); }
.qa summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 20px; font-weight: 700; font-size: 16px; line-height: 1.4; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary i { width: 28px; height: 28px; flex: 0 0 auto; border-radius: 50%; border: 1.5px solid var(--line-2); position: relative; transition: transform .4s var(--ease-out), background .3s; }
.qa summary i::before, .qa summary i::after { content: ""; position: absolute; left: 50%; top: 50%; width: 12px; height: 2px; background: var(--navy-700); transform: translate(-50%, -50%); transition: transform .4s, background .3s; }
.qa summary i::after { transform: translate(-50%, -50%) rotate(90deg); }
.qa[open] summary i { background: var(--navy-700); border-color: var(--navy-700); }
.qa[open] summary i::before, .qa[open] summary i::after { background: #fff; }
.qa[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.qa p { padding: 0 20px 20px; color: var(--muted); font-size: 15px; }
@media (max-width: 860px) { .faq__grid { grid-template-columns: 1fr; } .faq__head { position: static; } }

/* ---------- contact ---------- */
.contact { overflow: hidden; }
.contact__bg { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(60% 50% at 10% 100%, rgba(58,155,214,.25), transparent 70%); }
.contact__grid { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 80px); align-items: start; }
.contact__points { margin-top: 26px; display: grid; gap: 12px; font-size: 15px; color: rgba(255,255,255,.85); }
.contact__points li { display: flex; gap: 12px; align-items: flex-start; }
.contact__points svg { width: 20px; height: 20px; flex: 0 0 auto; color: #8ccbf0; stroke-width: 3; margin-top: 2px; }
.contact__direct { margin-top: 32px; display: grid; gap: 10px; }
.contact__card { display: flex; align-items: center; gap: 16px; padding: 14px 18px; border-radius: 16px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); transition: background .3s, transform .35s var(--ease-out), border-color .3s; }
.contact__card:hover { background: rgba(255,255,255,.11); transform: translateX(6px); border-color: rgba(140,203,240,.45); }
.contact__card svg { width: 24px; height: 24px; color: #8ccbf0; flex: 0 0 auto; }
.contact__card span { display: block; font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: rgba(255,255,255,.55); font-weight: 700; }
.contact__card b { display: block; font-size: 17px; font-weight: 800; }
.contact__card small { font-size: 12.5px; color: rgba(255,255,255,.6); }

.form { background: #fff; color: var(--text); border-radius: var(--r-xl); padding: clamp(24px, 3vw, 40px); box-shadow: 0 40px 100px rgba(0,0,0,.35); display: grid; gap: 18px; }
.form__head h3 { font-size: 24px; font-weight: 800; letter-spacing: -.02em; }
.form__head p { color: var(--muted); font-size: 14px; margin-top: 4px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field { display: grid; gap: 7px; }
.field > span, .field legend { font-size: 13px; font-weight: 700; color: var(--text-2); }
.field i { font-style: normal; color: #e05252; }
.field input, .field select {
  width: 100%; height: 50px; padding: 0 16px; border-radius: 12px; border: 1.5px solid var(--line-2); background: var(--bg);
  transition: border-color .25s, box-shadow .25s, background .25s;
  -webkit-appearance: none; appearance: none;
}
.field select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235b7084' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; background-size: 16px; padding-right: 40px; }
.field input::placeholder { color: #9aacbb; }
.field input:focus, .field select:focus { outline: none; border-color: var(--sky-400); background: #fff; box-shadow: 0 0 0 4px rgba(58,155,214,.16); }
.field input.is-invalid { border-color: #e05252; box-shadow: 0 0 0 4px rgba(224,82,82,.14); }
.field--chips { border: 0; padding: 0; margin: 0; }
.field--chips legend { padding: 0; margin-bottom: 8px; }
.field--chips small { font-weight: 500; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips label { position: relative; }
.chips input { position: absolute; opacity: 0; inset: 0; }
.chips span { display: inline-block; padding: 9px 14px; border-radius: 999px; border: 1.5px solid var(--line-2); font-size: 13.5px; font-weight: 600; color: var(--text-2); background: var(--bg); cursor: pointer; transition: all .25s; user-select: none; }
.chips input:checked + span { background: var(--navy-700); border-color: var(--navy-700); color: #fff; }
.chips input:focus-visible + span { outline: 3px solid var(--sky-400); outline-offset: 2px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form .btn--primary { margin-top: 4px; }
.btn__loading { display: none; width: 18px; height: 18px; border: 2.5px solid rgba(255,255,255,.4); border-top-color: #fff; border-radius: 50%; animation: spin .8s linear infinite; }
.btn.is-loading .btn__loading { display: block; }
.btn.is-loading svg, .btn.is-loading .btn__text { opacity: .6; }
.btn.is-loading { pointer-events: none; }
.form__note { font-size: 12.5px; color: var(--muted); text-align: center; line-height: 1.5; }
.form__msg { display: none; padding: 14px 16px; border-radius: 12px; font-size: 14.5px; font-weight: 600; }
.form__msg.is-ok { display: block; background: #e8f7ee; color: #1b7a3f; }
.form__msg.is-err { display: block; background: #fdeeee; color: #b63c3c; }
.form.is-sent .form__row, .form.is-sent .field--chips, .form.is-sent .btn, .form.is-sent .form__note { display: none; }
.form.is-sent .form__head h3::before { content: "✓ "; color: #1b7a3f; }
@media (max-width: 960px) { .contact__grid { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .form__row { grid-template-columns: 1fr; } }

/* ---------- footer ---------- */
.footer { background: var(--navy-900); color: rgba(255,255,255,.72); padding: clamp(48px, 6vw, 72px) 0 calc(28px + env(safe-area-inset-bottom)); font-size: 14.5px; }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
.footer__brand img { width: 170px; filter: brightness(0) invert(1); opacity: .95; }
.footer__brand p { margin-top: 18px; max-width: 34ch; }
.footer__motto { margin-top: 18px; font-size: 12px; font-weight: 800; letter-spacing: .3em; color: #8ccbf0; }
.footer__col h5 { font-size: 12.5px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: #fff; margin-bottom: 16px; }
.footer__col a { display: block; padding: 5px 0; transition: color .3s; }
.footer__col a:hover { color: #fff; }
.footer__col p { margin-bottom: 12px; }
.footer__col b { color: #fff; font-weight: 700; }
.footer__bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 13px; color: rgba(255,255,255,.5); }
@media (max-width: 900px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer__grid { grid-template-columns: 1fr; gap: 28px; } }

/* ---------- mobile sticky cta ---------- */
.sticky-cta {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 80;
  display: none; gap: 8px; padding: 10px var(--gutter) calc(10px + env(safe-area-inset-bottom));
  background: rgba(255,255,255,.9); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--line);
  transform: translateY(110%); transition: transform .5s var(--ease-out);
}
.sticky-cta.is-visible { transform: none; }
.sticky-cta__btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 48px; border-radius: 14px; font-weight: 700; font-size: 14px; }
.sticky-cta__btn--call { width: 48px; background: var(--sky-50); color: var(--blue-500); }
.sticky-cta__btn--call svg { width: 20px; height: 20px; }
.sticky-cta__btn--call span { display: none; }
.sticky-cta__btn--zalo { width: 48px; background: #e9f3ff; color: #0068ff; }
.sticky-cta__btn--zalo b { font-size: 18px; font-weight: 900; }
.sticky-cta__btn--zalo span { display: none; }
.sticky-cta__btn--main { flex: 1; background: var(--grad); color: #fff; box-shadow: var(--shadow-blue); }
@media (max-width: 720px) {
  .sticky-cta { display: flex; }
  body { padding-bottom: 0; }
  .footer { padding-bottom: calc(96px + env(safe-area-inset-bottom)); }
}

/* ---------- reveal & split ---------- */
[data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity .9s var(--ease-out), transform .9s var(--ease-out); will-change: opacity, transform; }
[data-reveal].is-in { opacity: 1; transform: none; }
.js [data-split] .w { display: inline-block; overflow: hidden; vertical-align: bottom; padding-bottom: .08em; margin-bottom: -.08em; }
.js [data-split] .w > span { display: inline-block; transform: translateY(110%); transition: transform 1s var(--ease-out); }
.js [data-split].is-in .w > span { transform: none; }

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  [data-reveal], .js [data-split] .w > span { opacity: 1; transform: none; }
  .intro { display: none; }
  .revchart__bar, .waves span, .pillars__line i, .steps__line i { transform: none; }
}