:root {
  --green: #2767FC;
  --green-dark: #1d56e6;
  --green-soft: #eef3ff;
  --green-soft-2: #f5f7fb;
  --yellow: #FDCC4C;
  --yellow-dark: #e8b63a;
  --green-panel: #2156e8;
  --mint: #eef3ff;
  --black: #12151a;
  --text: #3d4554;
  --muted: #6f7786;
  --line: rgba(18, 21, 26, 0.08);
  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --panel: #eef3ff;
  --radius: 28px;
  --radius-lg: 40px;
  --radius-pill: 999px;
  --container: 1500px;
  --gutter: 1.25rem;
  --header-h: 5.35rem;
  --shadow: 0 18px 50px rgba(18, 21, 26, 0.1);
  --font: 'Be Vietnam Pro', system-ui, sans-serif;
  --font-brand: 'Outfit', 'Be Vietnam Pro', system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 0.75rem);
  overflow-x: hidden;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  width: 100%;
  max-width: 100%;
  position: relative;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  z-index: 400;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: var(--green-panel);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
}
.skip-link:focus { top: 0.75rem; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button, input, select, textarea { font: inherit; }

.container {
  width: min(100% - (var(--gutter) * 2), var(--container));
  margin-inline: auto;
}

h1, h2, h3 {
  color: var(--black);
  line-height: 1.28;
  letter-spacing: -0.015em;
  font-weight: 400;
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
}

h2 {
  font-size: clamp(1.35rem, 2.4vw, 2rem);
}

h3 {
  font-size: 1.02rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.4;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 3rem;
  padding: 0.75rem 1.35rem;
  border-radius: var(--radius-pill);
  border: none;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.25s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--green);
  color: #fff;
}
.btn-primary:hover {
  background: var(--green-dark);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--black);
  border: 1.5px solid rgba(18, 21, 26, 0.14);
}
.btn-ghost:hover {
  border-color: var(--green);
  color: var(--green);
}
.btn-light {
  background: #fff;
  color: var(--black);
  box-shadow: 0 8px 24px rgba(18, 21, 26, 0.12);
}
.btn-light:hover {
  color: var(--green);
}
.btn-yellow {
  background: var(--yellow);
  color: var(--black);
  font-weight: 700;
  border-radius: 24px;
  min-height: 3rem;
  padding: 0.85rem 1.75rem;
}
.btn-yellow:hover {
  background: var(--yellow-dark);
  color: var(--black);
}
.btn-mint {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  font-weight: 600;
  border-radius: 24px;
  min-height: 3rem;
  padding: 0.85rem 1.75rem;
  white-space: nowrap;
  border: 1.5px solid rgba(255, 255, 255, 0.28);
}
.btn-mint:hover {
  background: #fff;
  color: var(--green-panel);
}
.btn-soft {
  background: #fff;
  color: var(--black);
  box-shadow: 0 2px 10px rgba(18, 21, 26, 0.06);
  padding-right: 0.55rem;
}
.btn-soft:hover { color: var(--green); }
.btn-ico {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--green-soft);
  color: var(--black);
  font-size: 0.75rem;
}
.btn-block { width: 100%; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: #fff;
  border-bottom: 1px solid rgba(18, 21, 26, 0.06);
  transition: box-shadow 0.25s;
}
.header.scrolled {
  box-shadow: 0 8px 24px rgba(18, 21, 26, 0.06);
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}
.logo {
  display: inline-flex;
  align-items: center;
  flex-direction: row;
  gap: 0.75rem;
  flex-shrink: 0;
}
.logo-img {
  height: 3.15rem;
  width: auto;
  display: block;
}
.logo-mark {
  width: 2.85rem;
  height: 3.35rem;
  border-radius: 0;
  background: url("../images/logo-mark.png") center / contain no-repeat;
  flex-shrink: 0;
  box-shadow: none;
}
img.logo-mark {
  width: 2.85rem;
  height: 3.35rem;
  object-fit: contain;
  display: block;
}
.logo-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.18rem;
  min-width: 0;
}
.logo-name {
  font-family: var(--font-brand);
  font-size: 1.42rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.05;
  text-transform: uppercase;
  white-space: nowrap;
  color: #2156e8;
}
.logo-vu { color: #2156e8; }
.logo-decal { color: #2156e8; }
.logo-tag {
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--muted);
  text-transform: none;
  line-height: 1.25;
}
.logo-tag-short { display: none; }

.nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-left: auto;
  flex: 1;
  justify-content: flex-end;
}
.nav ul {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0;
  margin-right: auto;
  margin-left: clamp(0.35rem, 2vw, 1.75rem);
}
.nav ul a {
  display: inline-flex;
  padding: 0.5rem 0.55rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--black);
  white-space: nowrap;
}
.nav ul a:hover,
.nav ul a.active { color: var(--green); }

.header-cta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}
.nav-phone {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.7rem;
  padding: 0.3rem 0.95rem 0.3rem 0.35rem;
  border-radius: 999px;
  border: 1.5px solid rgba(18, 21, 26, 0.12);
  background: #fff;
  color: var(--black);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.nav-phone:hover {
  border-color: rgba(18, 21, 26, 0.22);
  color: var(--black);
  box-shadow: 0 4px 14px rgba(18, 21, 26, 0.06);
}
.nav-phone-ico {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--yellow);
  color: var(--black);
  font-size: 0.78rem;
  flex-shrink: 0;
}
.nav-cta {
  white-space: nowrap;
  min-height: 2.7rem;
  padding: 0.55rem 1.25rem;
  font-size: 0.9rem;
  border-radius: 999px;
}
@media (max-width: 1280px) {
  .nav-cta { display: none; }
}
@media (max-width: 1120px) {
  .nav-phone { padding-right: 0.4rem; }
  .nav-phone > span:last-child { display: none; }
}

.header-actions {
  display: none;
  align-items: center;
  gap: 0.45rem;
  margin-left: auto;
  position: relative;
  z-index: 320;
}
.header-call,
.menu-toggle {
  width: 2.65rem;
  height: 2.65rem;
  border-radius: 50%;
  border: 0;
  background: var(--bg-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--black);
  position: relative;
  z-index: 320;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}
.header-call {
  font-size: 0.9rem;
}
.header-call:hover,
.menu-toggle:hover {
  background: var(--green-soft);
  color: var(--green-panel);
}
.menu-toggle {
  display: none;
}
.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 280;
  background: rgba(18, 21, 26, 0.45);
  border: 0;
  padding: 0;
  cursor: pointer;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}
.nav-backdrop[hidden] { display: none !important; }
.menu-toggle span {
  position: absolute;
  left: 0.45rem;
  height: 2px;
  background: var(--black);
  transition: 0.25s;
  border-radius: 2px;
}
.menu-toggle span:nth-child(1) {
  top: 0.95rem;
  width: 1.55rem;
}
.menu-toggle span:nth-child(2) {
  top: 1.4rem;
  width: 1.1rem;
}
.nav-open .menu-toggle span:nth-child(1) {
  top: 1.2rem;
  width: 1.45rem;
  transform: rotate(45deg);
}
.nav-open .menu-toggle span:nth-child(2) {
  top: 1.2rem;
  width: 1.45rem;
  transform: rotate(-45deg);
}

/* Hero — Solar X style */
.hero {
  padding: 0.5rem 0 1.5rem;
  background: #fff;
}
.hero-frame {
  position: relative;
  width: 100%;
  min-height: min(72vh, 680px);
  border-radius: 48px;
  overflow: hidden;
  background: #1b2430;
  display: flex;
  align-items: center;
}
.hero-slides {
  position: absolute;
  inset: 0;
}
.hero-slides::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: linear-gradient(105deg, rgba(12, 18, 28, 0.28) 0%, rgba(12, 18, 28, 0.1) 46%, rgba(12, 18, 28, 0.06) 100%);
}
.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 62% 48%;
  filter: none;
  opacity: 0;
  transform: none;
  z-index: 0;
  transition: opacity 0.35s ease;
}
.hero-img.is-leaving {
  opacity: 1;
  z-index: 1;
  transition: none;
}
.hero-img.is-active {
  opacity: 1;
  z-index: 2;
  animation: none;
}
.hero-img-a { object-position: 60% 50%; }
.hero-img-b { object-position: 58% 46%; }
.hero-img-c { object-position: 50% 52%; }
.hero-dots {
  position: absolute;
  z-index: 4;
  right: 1.5rem;
  left: auto;
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.4rem;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: none;
}
.hero-dots button {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 999px;
  border: none;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  padding: 0;
  transition: width 0.25s ease, height 0.25s ease, background 0.25s ease, opacity 0.25s ease;
}
.hero-dots button:hover {
  background: rgba(255, 255, 255, 0.9);
}
.hero-dots button.is-active {
  height: 1.15rem;
  width: 0.4rem;
  background: var(--yellow);
  box-shadow: none;
}
.hero-panel {
  position: relative;
  z-index: 5;
  width: min(100%, 33rem);
  min-height: 0;
  margin: 2.25rem 0 2.25rem 2.25rem;
  padding: clamp(2.1rem, 4.8vh, 2.85rem) clamp(1.75rem, 4vh, 2.5rem) 2.1rem;
  background: #fff;
  border-radius: 0;
  box-shadow: none;
  filter: none;
  display: flex;
  flex-direction: column;
  /* Solar X vamtam-cp-top-left — left high, soft dip to the right */
  clip-path: polygon(
    32.25px 0,
    calc(100% - 29.9px) 14.17px,
    calc(100% - 25px) 14.88px,
    calc(100% - 20.3px) 16.3px,
    calc(100% - 16px) 18.37px,
    calc(100% - 12.1px) 21.03px,
    calc(100% - 8.64px) 24.23px,
    calc(100% - 5.68px) 27.9px,
    calc(100% - 3.28px) 31.99px,
    calc(100% - 1.49px) 36.42px,
    calc(100% - 0.38px) 41.16px,
    100% 46.12px,
    100% calc(100% - 32.02px),
    calc(100% - 0.42px) calc(100% - 26.83px),
    calc(100% - 1.63px) calc(100% - 21.9px),
    calc(100% - 3.57px) calc(100% - 17.31px),
    calc(100% - 6.17px) calc(100% - 13.11px),
    calc(100% - 9.37px) calc(100% - 9.38px),
    calc(100% - 13.09px) calc(100% - 6.18px),
    calc(100% - 17.28px) calc(100% - 3.57px),
    calc(100% - 21.87px) calc(100% - 1.63px),
    calc(100% - 26.8px) calc(100% - 0.42px),
    calc(100% - 31.98px) 100%,
    31.98px 100%,
    26.8px calc(100% - 0.42px),
    21.87px calc(100% - 1.63px),
    17.28px calc(100% - 3.57px),
    13.09px calc(100% - 6.18px),
    9.37px calc(100% - 9.38px),
    6.17px calc(100% - 13.11px),
    3.57px calc(100% - 17.31px),
    1.63px calc(100% - 21.9px),
    0.42px calc(100% - 26.83px),
    0 calc(100% - 32.02px),
    0 32.02px,
    0.42px 26.83px,
    1.63px 21.9px,
    3.57px 17.31px,
    6.17px 13.11px,
    9.37px 9.38px,
    13.09px 6.18px,
    17.28px 3.57px,
    21.87px 1.63px,
    26.8px 0.42px,
    31.98px 0
  );
}
.hero-panel h1 {
  font-size: clamp(1.5rem, 2.7vw, 2.15rem);
  line-height: 1.28;
  letter-spacing: -0.015em;
  font-weight: 400;
  color: #000;
  max-width: 16em;
}
.hero-lead {
  margin: 1.15rem 0 0;
  color: rgba(0, 0, 0, 0.6);
  font-size: clamp(1rem, 1.15vw, 1.125rem);
  line-height: 1.65;
  font-weight: 400;
  max-width: 34em;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1.5rem;
  margin: auto 0 0;
  padding-top: 2rem;
  list-style: none;
  color: rgba(0, 0, 0, 0.6);
  font-size: 0.875rem;
  font-weight: 400;
}
.hero-trust li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
}
.hero-check {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  flex-shrink: 0;
  background: var(--green-panel);
  color: #fff;
  font-size: 0.62rem;
}

.hero-mobile-cta { display: none; }

/* Brands */
.sec-brands {
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--line);
}
.brands-note { display: none; }
.brands-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.35rem 0;
}
.brands-row span {
  position: relative;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-size: 0.78rem;
  padding: 0.15rem 1.35rem;
  white-space: nowrap;
}
.brands-row span + span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--green);
  opacity: 0.4;
  transform: translate(-50%, -50%);
}

/* Sections common */
.sec { padding: 5rem 0; }
.sec-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.7rem;
}
.sec-label::after {
  content: "//";
  color: var(--green);
  letter-spacing: 0.02em;
  font-weight: 500;
}
.sec-label-slash::after {
  /* kept for markup compatibility — slash already on .sec-label */
  content: "//";
  color: var(--green);
  letter-spacing: 0.02em;
  font-weight: 500;
}
.sec-label-light {
  color: rgba(255, 255, 255, 0.78);
}
.sec-label-light::after {
  content: "//";
  color: var(--yellow);
  letter-spacing: 0.02em;
  font-weight: 500;
}
.sec-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.75rem;
  margin-bottom: 2.15rem;
}
.sec-head h2 {
  margin: 0;
  max-width: 16em;
}
.sec-title-center {
  text-align: center;
  max-width: 14em;
  margin: 0 auto 2.75rem;
}
.sec-sub {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
  font-weight: 400;
  max-width: 36em;
}

/* Services */
.sec-services {
  background: #fff;
  padding-top: 4.25rem;
  padding-bottom: 4.5rem;
}
.sec-services .sec-head h2,
.sec-gallery .sec-head h2,
.sec-tips .sec-head h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.015em;
}
.svc-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.35rem;
}
.svc-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.15rem;
}
.svc-grid-6 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.svc-card {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1rem 1rem 1.2rem;
  border-radius: 28px;
  background: linear-gradient(180deg, #c5d8ff 0%, #d7e4ff 38%, #e8efff 72%, #f3f7ff 100%);
  border: none;
  color: inherit;
  min-height: 100%;
  box-shadow: 0 10px 28px rgba(33, 86, 232, 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}
.svc-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 22px 44px rgba(33, 86, 232, 0.12);
  background: linear-gradient(180deg, #b9d0ff 0%, #cfe0ff 38%, #e4edff 72%, #f0f5ff 100%);
}
.svc-img {
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: #dce8ff;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}
.svc-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s ease;
}
.svc-card:hover .svc-img img {
  transform: scale(1.045);
}
.svc-card h3 {
  margin: 0.05rem 0 0;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--black);
  min-height: 2.6em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.svc-grid-4 .svc-card h3 {
  font-size: 1.05rem;
  min-height: 2.6em;
}
.svc-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.svc-grid-4 .svc-card p {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.svc-card .btn-soft {
  align-self: flex-start;
  margin-top: auto;
  font-size: 0.86rem;
  font-weight: 700;
  min-height: 2.65rem;
  padding: 0.3rem 0.38rem 0.3rem 1.05rem;
  box-shadow: 0 4px 16px rgba(18, 21, 26, 0.07);
}
.svc-card .btn-soft:hover { transform: none; color: var(--black); }
.svc-card .btn-ico {
  background: var(--yellow);
  color: var(--black);
  width: 1.85rem;
  height: 1.85rem;
}
.svc-card:hover .btn-ico {
  background: var(--green);
  color: #fff;
}

.svc-carousel { --svc-gap: 1.15rem; --svc-show: 4; }
.svc-carousel-viewport { overflow: hidden; }
.svc-carousel-track {
  display: flex;
  width: 100%;
  gap: var(--svc-gap);
  transition: transform 0.45s ease;
  will-change: transform;
}
.svc-carousel-track .svc-card {
  flex: 0 0 calc((100% - (var(--svc-show) - 1) * var(--svc-gap)) / var(--svc-show));
  min-width: 0;
}
.svc-carousel-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.35rem;
}
.svc-all-link {
  padding-right: 1.15rem;
  gap: 0.5rem;
}
.svc-all-link i {
  font-size: 0.78rem;
}
.sec-services .sec-head .svc-carousel-btns { flex-shrink: 0; }
.svc-carousel-btns { display: flex; gap: 0.4rem; }
.svc-carousel-btn {
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 11px;
  border: 0;
  background: var(--green-soft);
  color: var(--green-panel);
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  font-size: 0.78rem;
  transition: background 0.2s ease, color 0.2s ease;
}
.svc-carousel-btn:hover:not(:disabled) {
  background: var(--green-panel);
  color: #fff;
}
.svc-carousel-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

/* Steps */
.sec-steps {
  background: #fff;
  padding: 2.75rem 0 5.5rem;
}
.steps-wrap {
  display: flex;
  flex-direction: column;
  gap: 2.85rem;
}
.steps-intro {
  text-align: center;
  max-width: none;
}
.steps-intro .sec-label { margin-bottom: 0.55rem; }
.steps-intro h2 {
  margin: 0 auto;
  max-width: 14em;
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.3;
  color: var(--black);
}
.steps-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  width: 100%;
  margin: 0;
  padding: 0 1.25rem;
  list-style: none;
}
.step-card {
  padding: 0 2.15rem;
  background: none;
  border-radius: 0;
  box-shadow: none;
  border-left: 1px solid var(--line);
}
.step-card:first-child {
  padding-left: 0;
  border-left: 0;
}
.step-card:last-child { padding-right: 0; }
.step-num {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-brand);
  font-size: 2.05rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--green-panel);
}
.step-num::after {
  content: "";
  display: block;
  width: 1.5rem;
  height: 3px;
  margin: 0.65rem 0 0.9rem;
  border-radius: 99px;
  background: var(--yellow);
}
.step-body h3 {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--black);
}
.step-body p {
  margin: 0.45rem 0 0;
  max-width: 28em;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* Who we are + Why Choose Us — Solar X stacked */
.sec-story {
  background: #fff;
  padding-top: 2rem;
  padding-bottom: 2rem;
}
.story-stack {
  position: relative;
}
.about-block {
  position: relative;
  z-index: 2;
  background: var(--green-soft);
  border-radius: 40px;
  padding: clamp(2rem, 4vw, 3.25rem);
}
.about-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.75rem, 3.5vw, 3.25rem);
  align-items: center;
}
.about-copy h2 {
  max-width: 16em;
  margin-bottom: 1rem;
  font-size: clamp(1.4rem, 2.4vw, 1.95rem);
  line-height: 1.28;
}
.about-lead {
  color: var(--muted);
  max-width: 40em;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(18, 21, 26, 0.1);
  font-size: 1.05rem;
  line-height: 1.65;
  font-weight: 400;
}
.check-list {
  display: grid;
  gap: 1.15rem;
  margin: 0 0 2rem;
}
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  font-weight: 400;
  color: var(--black);
  line-height: 1.55;
  font-size: 0.95rem;
}
.check-list .check {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  flex-shrink: 0;
  margin-top: 0.12rem;
}
.about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.about-media {
  border-radius: 32px;
  overflow: hidden;
  min-height: 420px;
  height: 100%;
  box-shadow: 0 18px 40px rgba(18, 21, 26, 0.1);
}
.about-media img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  object-position: center;
  display: block;
}

.why-block {
  position: relative;
  z-index: 1;
  margin-top: -2.75rem;
  background: linear-gradient(165deg, #2d6fff 0%, #1e4fd4 100%);
  border-radius: 32px;
  padding: clamp(3.5rem, 6vw, 4.75rem) clamp(1.75rem, 4vw, 3.25rem) clamp(2.5rem, 4vw, 3.5rem);
  color: #fff;
}
.why-block h2 {
  color: #fff;
  max-width: 14em;
  font-size: clamp(1.4rem, 2.5vw, 2.05rem);
  line-height: 1.28;
  letter-spacing: -0.015em;
}
.why-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2.75rem;
}
.why-copy .sec-label {
  margin-bottom: 0.85rem;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}
.stat-card {
  background: transparent;
  border-radius: 0;
  padding: 0.35rem 1.75rem;
  border-right: 1px solid rgba(255, 255, 255, 0.3);
}
.stat-card:first-child { padding-left: 0; }
.stat-card:last-child {
  border-right: none;
  padding-right: 0;
}
.stat-num {
  font-size: clamp(2.5rem, 4vw, 2.9rem);
  font-weight: 600;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat-num span {
  color: #fff;
  font-weight: 400;
}
.stat-lbl {
  margin-top: 0.65rem;
  color: rgba(255, 255, 255, 0.88);
  font-weight: 400;
  font-size: 0.95rem;
}

/* Testimonials */
.sec-testimonials { background: #fff; }
.t-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.t-card {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 1.6rem 1.4rem;
}
.t-stars {
  color: var(--yellow-dark);
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}
.t-card p {
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}
.t-card footer {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.t-card strong { color: var(--black); font-size: 0.95rem; }
.t-card span { color: var(--muted); font-size: 0.85rem; }
.t-logos {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.85rem 0.75rem;
  align-items: center;
  margin: 0 0 2rem;
  padding: 1.35rem 1rem 1.2rem;
  list-style: none;
  border-radius: 28px;
  background: var(--bg-soft);
}
.t-logos li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.t-logos svg {
  width: 2.35rem;
  height: 2.35rem;
  color: #8b93a2;
}

/* Quote form — Solar X yellow panel */
.sec-quote {
  background: #fff;
  padding-bottom: 3.5rem;
}
.quote-panel {
  background: linear-gradient(145deg, #FDCC4C 0%, #f6d36a 42%, #fff4c4 100%);
  border-radius: 72px 40px 40px 40px;
  padding: clamp(2.25rem, 4.5vw, 3.75rem) clamp(1.75rem, 4vw, 3.5rem);
}
.quote-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(1.75rem, 3.5vw, 3.25rem);
  align-items: start;
}
.quote-copy {
  padding-top: 0.25rem;
}
.quote-panel .sec-label {
  margin-bottom: 0.7rem;
  color: rgba(18, 21, 26, 0.72);
}
.quote-panel h2 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.6rem, 2.7vw, 2.2rem);
  line-height: 1.28;
  letter-spacing: -0.015em;
  max-width: 11em;
}
.quote-lead {
  margin: 0 0 1.75rem;
  max-width: 28rem;
  color: rgba(18, 21, 26, 0.68);
  font-size: 1.05rem;
  line-height: 1.6;
  font-weight: 400;
}
.quote-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 1.15rem;
  background: rgba(255, 255, 255, 0.55);
  padding: 1.5rem;
  box-shadow: 0 12px 36px rgba(18, 21, 26, 0.06);
  border-radius: 28px;
}
.quote-form label {
  display: grid;
  gap: 0.35rem;
}
.quote-form .qf-full,
.quote-form .qf-actions,
.quote-form .form-note {
  grid-column: 1 / -1;
}
.quote-form span {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--black);
}
.quote-form span em {
  font-style: normal;
  font-weight: 500;
  color: rgba(18, 21, 26, 0.55);
}
.quote-form input,
.quote-form select,
.quote-form textarea {
  width: 100%;
  border: none;
  border-radius: 14px;
  padding: 0.9rem 1rem;
  background: #fff;
  color: var(--black);
  outline: none;
  box-shadow: 0 1px 0 rgba(18, 21, 26, 0.04);
  transition: box-shadow 0.2s;
}
.quote-form input:focus,
.quote-form select:focus,
.quote-form textarea:focus {
  box-shadow: 0 0 0 2px rgba(39, 103, 252, 0.35);
}
.quote-form textarea {
  resize: vertical;
  min-height: 110px;
}
.qf-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1.25rem;
  margin-top: 0.15rem;
}
.btn-dark {
  background: #12151a;
  color: #fff;
  font-weight: 700;
  border-radius: 999px;
  min-height: 3.15rem;
  padding: 0.9rem 1.85rem;
  box-shadow: 0 10px 24px rgba(18, 21, 26, 0.18);
}
.btn-dark:hover {
  background: #000;
  color: #fff;
}
.quote-call {
  color: var(--black);
  font-size: 0.95rem;
}
.quote-call:hover { text-decoration: underline; }
.quote-call strong { font-weight: 800; }
.form-note {
  font-size: 0.82rem;
  color: rgba(18, 21, 26, 0.58);
  text-align: left;
  margin: 0;
}
.quote-guarantee {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-top: 0.25rem;
  padding: 0;
  border-top: none;
  background: transparent;
  border-radius: 0;
}
.quote-guarantee-ico {
  flex: 0 0 auto;
  width: 2.85rem;
  height: 2.85rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.72);
  color: var(--green-panel);
  font-size: 1.05rem;
  box-shadow: 0 4px 14px rgba(18, 21, 26, 0.06);
}
.quote-guarantee h3 {
  margin: 0 0 0.3rem;
  font-size: 1.02rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.quote-guarantee p {
  margin: 0;
  color: rgba(18, 21, 26, 0.7);
  font-size: 0.92rem;
  line-height: 1.5;
  max-width: 26rem;
}

/* FAQ */
.sec-faq {
  background: #fff;
  padding-top: 2rem;
}
.faq-panel {
  background: var(--bg-soft);
  border-radius: 72px 40px 40px 40px;
  padding: clamp(2.25rem, 4.5vw, 3.75rem) clamp(1.75rem, 4vw, 3.5rem);
}
.faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: start;
}
.faq-intro .sec-label { margin-bottom: 0.7rem; }
.faq-intro h2 {
  margin: 0 0 0.95rem;
  font-size: clamp(1.5rem, 2.4vw, 2.05rem);
  letter-spacing: -0.015em;
  line-height: 1.28;
  max-width: 13em;
}
.faq-cta-line {
  margin: 0 0 0.55rem !important;
  color: var(--black) !important;
  font-size: 1.02rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.35;
  max-width: 18em;
}
.faq-intro p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  max-width: 28rem;
  line-height: 1.6;
  font-size: 1rem;
}
.faq-intro .btn { margin-right: 0.65rem; margin-bottom: 0.65rem; }
.faq-zalo { vertical-align: middle; }
.faq-list {
  display: grid;
  gap: 0;
  background: #fff;
  border-radius: 28px;
  padding: 0.35rem 0;
  overflow: hidden;
  box-shadow: 0 8px 28px rgba(18, 21, 26, 0.04);
}
.faq-item {
  background: transparent;
  border-radius: 0;
  overflow: hidden;
  border: none;
  border-bottom: 1px solid rgba(18, 21, 26, 0.08);
}
.faq-item:last-child { border-bottom: none; }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  text-align: left;
  background: transparent;
  border: none;
  padding: 1.25rem 1.5rem;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--black);
  cursor: pointer;
}
.faq-q i {
  color: var(--muted);
  font-size: 0.85rem;
  transition: transform 0.25s, color 0.25s;
}
.faq-a {
  display: none;
  padding: 0 1.5rem 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
}
.faq-item.active {
  border-color: rgba(18, 21, 26, 0.08);
  box-shadow: none;
}
.faq-item.active .faq-q { color: var(--green-panel); }
.faq-item.active .faq-a { display: block; }
.faq-item.active .faq-q i {
  transform: rotate(180deg);
  color: var(--green);
}

/* Gallery — even tiles */
.sec-gallery { background: #fff; }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}
.gallery-item {
  position: relative;
  display: block;
  margin: 0;
  border-radius: 22px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--green-soft);
  color: inherit;
  text-decoration: none;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.45s ease;
}
.gallery-item:hover img { transform: scale(1.04); }
.gallery-item span,
.gallery-item figcaption {
  position: absolute;
  left: 0.9rem;
  bottom: 0.9rem;
  background: rgba(255, 255, 255, 0.94);
  color: var(--black);
  font-weight: 600;
  font-size: 0.84rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-pill);
}

/* Footer — brand blue panel, 4-col brand + links */
.footer {
  background: #fff;
  color: var(--text);
  padding: 0.75rem 0 0;
  margin-top: 0.25rem;
}
.footer-panel {
  background: linear-gradient(180deg, #b8d0ff 0%, #d4e3ff 42%, #f3f7ff 100%);
  border-radius: 56px 36px 0 0;
  padding: clamp(2.25rem, 4vw, 3.25rem) clamp(1.5rem, 3.5vw, 2.75rem) 0;
  box-shadow: none;
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 26rem);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  align-items: start;
  padding-bottom: clamp(1.75rem, 3vw, 2.25rem);
  margin-bottom: clamp(1.75rem, 3vw, 2.25rem);
  border-bottom: 1px solid rgba(18, 21, 26, 0.08);
}
.footer-brand {
  max-width: 34rem;
  padding-right: 0;
}
.footer-brand-name {
  display: block;
  margin-bottom: 0.45rem;
}
.footer-brand-name .logo-name {
  font-family: var(--font-brand);
  font-size: clamp(1.85rem, 3vw, 2.45rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.1;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--black);
}
.footer-brand-name .logo-vu { color: var(--black); }
.footer-brand-name .logo-decal { color: var(--green-panel); }
.footer-company {
  margin: 0 0 0.4rem;
  color: var(--black);
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
}
.footer-tag {
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 1.15rem;
  font-weight: 400;
  line-height: 1.55;
  max-width: 32rem;
}
.footer-brand .btn-yellow {
  padding-inline: 1.45rem;
  min-height: 2.75rem;
  font-size: 0.9rem;
}
.footer-aside {
  padding-top: 0.35rem;
}
.footer-mail {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.footer-mail input {
  flex: 1;
  min-width: 0;
  min-height: 2.75rem;
  padding: 0 1.15rem;
  border: 0;
  border-radius: 999px;
  background: #fff;
  color: var(--black);
  font: inherit;
  font-size: 0.9rem;
  box-shadow: 0 4px 14px rgba(18, 21, 26, 0.05);
}
.footer-mail input::placeholder { color: #9aa3b2; }
.footer-mail input:focus {
  outline: 2px solid rgba(39, 103, 252, 0.28);
  outline-offset: 1px;
}
.footer-mail .btn {
  flex-shrink: 0;
  min-height: 2.75rem;
  padding-inline: 1.25rem;
}
.footer-heading {
  color: var(--black);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 0.95rem;
}
.footer-heading-ghost { visibility: hidden; }
.footer-nav {
  display: grid;
  grid-template-columns: 1.15fr 1.05fr 0.85fr 1.15fr;
  gap: clamp(1.5rem, 3.2vw, 2.75rem);
  align-items: start;
  padding-bottom: clamp(1.75rem, 3vw, 2.35rem);
}
.footer-svc ul,
.footer-nav .f-col ul {
  display: grid;
  gap: 0.52rem;
}
.footer-svc a,
.footer-nav .f-col ul:not(.f-contact) a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 500;
}
.footer-svc a:hover,
.footer-nav .f-col a:hover {
  color: var(--green-panel);
}

.f-contact {
  display: grid;
  gap: 0.55rem;
}
.f-contact li {
  display: block;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.45;
}
.f-contact > li > span:first-child {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}
.f-contact a {
  color: var(--black);
  font-weight: 700;
}
.f-contact a:hover { color: var(--green-panel); }
.f-addr { color: var(--black); font-weight: 500; }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: #fff;
  border-top: 0;
  border-radius: 28px 28px 0 0;
  padding: 1.1rem 1.35rem calc(1.25rem + env(safe-area-inset-bottom, 0px));
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
}
.footer-bottom p {
  max-width: 48rem;
  line-height: 1.45;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Tips — 3 even article cards */
.sec-tips { background: var(--bg-soft); }
.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}
.tip-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}
.tip-cat {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.4rem;
}
.tip-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(18, 21, 26, 0.04);
}
a.tip-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease;
}
a.tip-card-link:hover {
  transform: translateY(-2px);
}
a.tip-card-link:hover h3 {
  color: var(--green);
}
.tip-card .tip-img {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--green-soft);
}
.tip-card .tip-body { padding: 1.15rem 1.2rem 1.35rem; }
.tip-card .tip-body h3 {
  font-size: 1.02rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}
.tip-body p {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.text-center { text-align: center; }

.zalo-mark {
  font-weight: 800;
  font-size: 0.72rem;
  letter-spacing: -0.03em;
  line-height: 1;
}

.float-actions {
  position: fixed;
  right: 1.15rem;
  bottom: 1.15rem;
  z-index: 90;
  display: grid;
  gap: 0.5rem;
  width: max-content;
}
.float-btn {
  position: relative;
  width: 100%;
  height: 2.6rem;
  min-height: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 0;
  border: 0;
  border-radius: 0;
  color: var(--black);
  background: transparent;
  box-shadow: none;
  overflow: visible;
}
.float-btn:hover {
  background: transparent;
  color: var(--black);
  box-shadow: none;
}
.float-btn i,
.float-btn .zalo-mark {
  position: relative;
  z-index: 1;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  flex-shrink: 0;
  background: var(--green-panel);
  color: #fff;
  font-size: 0.82rem;
  line-height: 1;
  box-shadow: 0 6px 16px rgba(33, 86, 232, 0.22);
  transition: background 0.2s ease;
  animation: floatPulse 2.4s ease-out infinite;
}
.float-btn .zalo-mark {
  background: #0068ff;
  font-size: 0.56rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  animation-delay: 1.1s;
}
.float-phone:hover i { background: var(--green-dark); }
.float-zalo:hover .zalo-mark { background: #0058d6; }
.float-label {
  position: static;
  transform: none;
  opacity: 1;
  pointer-events: none;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  height: 1.85rem;
  margin-left: -0.7rem;
  padding: 0 0.75rem 0 0.95rem;
  border-radius: 0 999px 999px 0;
  background: #fff;
  color: var(--black);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(18, 21, 26, 0.08);
}

@keyframes floatPulse {
  0%, 100% { box-shadow: 0 6px 16px rgba(33, 86, 232, 0.22), 0 0 0 0 rgba(33, 86, 232, 0.28); }
  70% { box-shadow: 0 6px 16px rgba(33, 86, 232, 0.22), 0 0 0 7px rgba(33, 86, 232, 0); }
}

/* Motion system */
@keyframes kenburns {
  from { transform: scale(1.08); }
  to { transform: scale(1); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
@keyframes heroRise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
.hero-frame,
.hero-panel h1,
.hero-lead,
.hero-trust,
.svc-hero-frame { animation: none; }

.reveal,
.reveal-left,
.reveal-right,
.reveal.is-in {
  opacity: 1;
  transform: none;
  filter: none;
  transition: none;
}

@media (prefers-reduced-motion: reduce) {
  .float-btn { transition: none; }
  .float-btn i,
  .float-btn .zalo-mark { animation: none; }
  .svc-carousel-track { transition: none; }
  .hero-frame,
  .hero-panel h1,
  .hero-lead,
  .hero-trust,
  .svc-hero-frame,
  .hero-img.is-active { animation: none; }
  .hero-img { transform: none; }
  .reveal,
  .reveal-left,
  .reveal-right {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn:hover { transform: none; }
}

/* Responsive */
@media (max-width: 980px) {
  html, body {
    overflow-x: hidden;
    max-width: 100%;
  }
  /* Header must sit ABOVE backdrop so the drawer (child) is clickable */
  .header {
    position: relative;
    z-index: 300;
    overflow: hidden;
  }
  body.nav-open .header {
    overflow: visible;
  }
  .header-actions { display: inline-flex; }
  .menu-toggle { display: inline-flex; }
  body.nav-open {
    position: fixed;
    inset: 0;
    width: 100%;
    overflow: hidden;
    touch-action: none;
  }
  html.nav-open {
    overflow: hidden;
  }
  .nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    width: min(21rem, 88vw);
    max-width: 100%;
    height: 100vh;
    height: 100dvh;
    margin: 0;
    flex: none;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 5.35rem 1.25rem 1.5rem;
    background: var(--bg-soft);
    transform: translate3d(100%, 0, 0);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.28s ease, visibility 0.28s;
    box-shadow: -18px 0 48px rgba(18, 21, 26, 0.18);
    z-index: 310;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    border-radius: 28px 0 0 28px;
  }
  body.nav-open .nav {
    transform: translate3d(0, 0, 0);
    visibility: visible;
    pointer-events: auto;
  }
  body.nav-open .header-call {
    display: none;
  }
  body.nav-open .menu-toggle {
    background: #fff;
    border: 1px solid rgba(18, 21, 26, 0.1);
    box-shadow: 0 6px 16px rgba(18, 21, 26, 0.08);
  }
  body.nav-open .float-actions {
    opacity: 0;
    pointer-events: none;
  }
  .nav-backdrop {
    z-index: 280;
  }
  .nav::before {
    content: none;
    display: none;
  }
  .nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    width: 100%;
    flex: none;
    background: #fff;
    border-radius: 22px;
    padding: 0.25rem 0.85rem;
    box-shadow: 0 8px 24px rgba(18, 21, 26, 0.04);
  }
  .nav ul li {
    width: 100%;
  }
  .nav ul a {
    display: flex;
    align-items: center;
    width: 100%;
    box-sizing: border-box;
    padding: 1rem 0.15rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--black);
    border-bottom: 1px solid rgba(18, 21, 26, 0.06);
  }
  .nav ul li:last-child a {
    border-bottom: 0;
  }
  .nav ul a:hover,
  .nav ul a:active {
    color: var(--green-panel);
  }
  .header-cta {
    flex-direction: column;
    align-items: stretch;
    gap: 0.7rem;
    margin-top: 1.15rem;
    width: 100%;
    flex: none;
  }
  .nav-phone,
  .nav-cta {
    display: inline-flex;
    width: 100%;
    justify-content: center;
    text-align: center;
    min-height: 3.1rem;
    border-radius: 999px;
  }
  .nav-phone > span:last-child { display: inline; }
  .nav-phone {
    padding: 0.45rem 1rem 0.45rem 0.45rem;
    font-size: 1.02rem;
    background: #fff;
    border: 1px solid rgba(18, 21, 26, 0.08);
    box-shadow: 0 6px 18px rgba(18, 21, 26, 0.05);
  }
  .nav-phone:hover {
    border-color: rgba(18, 21, 26, 0.14);
    color: var(--black);
  }
  .nav-phone-ico {
    width: 2.2rem;
    height: 2.2rem;
  }
  .nav-cta {
    box-shadow: 0 8px 20px rgba(242, 215, 1, 0.28);
  }

  .svc-carousel { --svc-show: 2; --svc-gap: 1rem; }

  .svc-grid,
  .svc-grid-6,
  .stats-grid,
  .t-grid {
    grid-template-columns: 1fr 1fr;
  }
  .t-logos {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem 0.75rem;
    margin-bottom: 1.65rem;
    padding: 1.15rem 0.85rem 1.05rem;
  }
  .sec-steps { padding: 2.5rem 0 4rem; }
  .steps-wrap { gap: 2rem; }
  .steps-list { grid-template-columns: 1fr; width: 100%; padding: 0; }
  .step-card {
    display: grid;
    grid-template-columns: 3.4rem minmax(0, 1fr);
    gap: 0 1rem;
    padding: 1.15rem 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .step-card:first-child {
    padding-top: 0;
    border-top: 0;
  }
  .step-num {
    margin-bottom: 0;
    padding-top: 0.08rem;
    font-size: 1.7rem;
  }
  .step-num::after { display: none; }
  .gallery-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }
  .tips-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.85rem;
  }
  .svc-grid-4 {
    grid-template-columns: 1fr;
    gap: 0.95rem;
  }
  .svc-grid-4 .svc-card {
    display: grid;
    grid-template-columns: minmax(0, 9.5rem) minmax(0, 1fr);
    grid-template-rows: auto auto auto;
    column-gap: 0.85rem;
    row-gap: 0.35rem;
    align-items: start;
    padding: 0.85rem;
    border-radius: 22px;
    min-width: 0;
  }
  .svc-grid-4 .svc-img {
    grid-row: 1 / span 3;
    aspect-ratio: 1;
    border-radius: 16px;
    height: 100%;
    min-height: 7.5rem;
  }
  .svc-grid-4 .svc-card h3 {
    font-size: 1.05rem;
    min-height: 0;
    margin: 0;
  }
  .svc-grid-4 .svc-card p {
    font-size: 0.9rem;
    -webkit-line-clamp: 2;
  }
  .svc-grid-4 .svc-card .btn-soft {
    margin-top: 0.15rem;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-aside { max-width: 28rem; }
  .footer-nav {
    grid-template-columns: 1fr 1fr;
    gap: 1.6rem 1.75rem;
  }
  .footer-brand {
    max-width: 28rem;
    padding-right: 0;
  }
  .hero-panel {
    width: auto;
    max-width: min(36rem, calc(100% - 2.5rem));
    min-height: 22rem;
    margin: 1.25rem;
    padding: 3.5rem 2.5rem 2.5rem;
  }
  .hero-trust {
    gap: 0.75rem 1.25rem;
    padding-top: 1.65rem;
  }
  .stat-card { padding: 0.5rem 1rem; }
  .about-grid { grid-template-columns: 1fr; }
  .about-media,
  .about-media img { min-height: 280px; }
  .quote-panel,
  .faq-panel {
    border-radius: 48px 28px 28px 28px;
  }
  .quote-layout,
  .faq-grid { grid-template-columns: 1fr; }
  .quote-form { grid-template-columns: 1fr; }
  .sec-head,
  .why-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .sec-services .sec-head {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .brands-row {
    justify-content: center;
    flex-wrap: wrap;
  }
  .sec-services .sec-head { margin-bottom: 1.5rem; }
}

@media (max-width: 640px) {
  :root { --gutter: 1rem; --header-h: 5.15rem; }
  .container { width: min(100% - (var(--gutter) * 2), var(--container)); }

  .logo { gap: 0.55rem; max-width: calc(100% - 6.25rem); }
  .logo-mark,
  img.logo-mark {
    width: 2.4rem;
    height: 2.85rem;
  }
  .logo-name { font-size: 1.18rem; letter-spacing: 0.02em; }
  .logo-tag-full { display: none; }
  .logo-tag-short {
    display: block;
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--black);
    letter-spacing: 0;
    text-transform: none;
    line-height: 1.25;
  }
  .header-call,
  .menu-toggle {
    width: 2.5rem;
    height: 2.5rem;
    background: #fff;
    border: 1px solid rgba(18, 21, 26, 0.08);
    box-shadow: 0 4px 12px rgba(18, 21, 26, 0.05);
  }
  .header-call {
    color: var(--green-panel);
  }
  .header-call:hover,
  .menu-toggle:hover {
    background: var(--green-soft);
    color: var(--green-panel);
  }

  /* Hero — clean stack, no awkward overlap */
  .hero { padding: 0.15rem 0 0.85rem; }
  .hero-frame {
    min-height: auto;
    max-height: none;
    aspect-ratio: auto;
    border-radius: 28px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-soft);
    overflow: hidden;
    box-shadow: none;
  }
  .hero-slides {
    position: relative;
    height: auto;
    aspect-ratio: 16 / 9;
    width: 100%;
    border-radius: 0;
    overflow: hidden;
    background: #1b2430;
    order: 1;
    flex: none;
  }
  .hero-img { height: 100%; }
  .hero-img-a,
  .hero-img-b,
  .hero-img-c { object-position: 50% 50%; }
  .hero-dots {
    right: auto;
    left: 50%;
    top: auto;
    bottom: 0.7rem;
    transform: translateX(-50%);
    flex-direction: row;
    gap: 0.35rem;
    padding: 0.35rem 0.5rem;
    background: rgba(18, 21, 26, 0.28);
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: none;
  }
  .hero-dots button {
    width: 0.38rem;
    height: 0.38rem;
    background: rgba(255, 255, 255, 0.45);
  }
  .hero-dots button.is-active {
    width: 1.05rem;
    height: 0.38rem;
    background: #fff;
    box-shadow: none;
  }
  .hero-panel {
    order: 2;
    position: relative;
    z-index: 2;
    margin: 0;
    width: 100%;
    min-height: 0;
    padding: 1.35rem 1.2rem 1.25rem;
    border-radius: 0;
    background: #fff;
    border: none;
    box-shadow: none;
    clip-path: none;
    filter: none;
  }
  .hero-panel h1 {
    font-size: clamp(1.3rem, 5.6vw, 1.6rem);
    line-height: 1.3;
    letter-spacing: -0.015em;
    font-weight: 400;
    margin: 0;
    max-width: none;
  }
  .hero-lead {
    margin: 0.75rem 0 0;
    font-size: 0.94rem;
    line-height: 1.55;
    color: rgba(0, 0, 0, 0.6);
  }
  .hero-trust {
    margin-top: 1.15rem;
    padding-top: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 0.55rem 0.9rem;
    width: 100%;
    font-size: 0.8rem;
  }
  .hero-trust li {
    flex: 0 0 auto;
    gap: 0.35rem;
  }
  .hero-check {
    width: 1.2rem;
    height: 1.2rem;
    font-size: 0.5rem;
  }
  .hero-mobile-cta { display: none !important; }

  /* Sections */
  .sec { padding: 2.75rem 0; }
  .sec-story { padding: 1.5rem 0; }
  .sec-label { font-size: 0.68rem; letter-spacing: 0.12em; margin-bottom: 0.6rem; }
  .sec-head h2,
  .sec-title-center,
  .steps-intro h2,
  .about-copy h2,
  .why-copy h2,
  .quote-panel h2,
  .faq-intro h2 {
    font-size: clamp(1.3rem, 5.6vw, 1.6rem);
    line-height: 1.3;
    letter-spacing: -0.015em;
  }
  .sec-head .btn {
    width: auto;
    justify-content: center;
  }
  .faq-cta-line { font-size: 1.02rem; }

  /* Brands — wrap on mobile, no horizontal page scroll */
  .sec-brands {
    padding: 0.85rem 0 0.35rem;
    border-bottom: 1px solid rgba(18, 21, 26, 0.06);
    overflow: hidden;
  }
  .sec-brands .container {
    overflow: visible;
    max-width: 100%;
  }
  .brands-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.25rem 0;
    width: 100%;
    min-width: 0;
    margin: 0;
    padding: 0.15rem 0;
    box-sizing: border-box;
  }
  .brands-row span {
    flex: 0 0 auto;
    font-size: 0.66rem;
    letter-spacing: 0.05em;
    padding: 0.12rem 0.55rem;
    color: var(--muted);
    white-space: nowrap;
  }

  /* Services — cleaner mobile stack */
  .sec-services { padding-top: 2.25rem; padding-bottom: 2.5rem; }
  .sec-services .sec-head {
    flex-direction: row;
    margin-bottom: 1.25rem;
    gap: 0.75rem;
    align-items: center;
  }
  .sec-services .sec-head h2 {
    max-width: 14em;
    font-size: clamp(1.25rem, 5.4vw, 1.5rem);
  }
  .sec-services .sec-head .svc-carousel-btns { margin-left: auto; }
  .svc-carousel-bar .btn { flex-shrink: 0; }
  .svc-carousel { --svc-show: 1; --svc-gap: 0.85rem; }

  .svc-grid,
  .svc-grid-4,
  .svc-grid-6,
  .stats-grid,
  .t-grid { grid-template-columns: 1fr; gap: 0.85rem; }
  .gallery-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
  }
  .gallery-item { border-radius: 16px; aspect-ratio: 4 / 3; }
  .gallery-item span,
  .gallery-item figcaption {
    left: 0.4rem;
    right: 0.4rem;
    bottom: 0.4rem;
    max-width: calc(100% - 0.8rem);
    font-size: 0.7rem;
    padding: 0.28rem 0.5rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .tips-grid { grid-template-columns: 1fr; gap: 0.85rem; }

  .svc-card {
    border-radius: 22px;
    padding: 0.85rem 0.85rem 1rem;
    gap: 0.55rem;
    background: linear-gradient(180deg, #c5d8ff 0%, #d7e4ff 38%, #f3f7ff 100%);
    display: flex;
    grid-template-columns: unset;
  }
  .svc-grid-4 .svc-card {
    display: flex;
    flex-direction: column;
    grid-template-columns: unset;
  }
  .svc-grid-4 .svc-img {
    grid-row: auto;
    aspect-ratio: 16 / 10;
    height: auto;
    min-height: 0;
  }
  .svc-card h3 {
    font-size: 1.05rem;
    margin-top: 0.15rem;
    min-height: 0;
  }
  .svc-card p {
    font-size: 0.88rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .svc-img {
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 16 / 10;
  }
  .svc-card .btn-soft {
    align-self: flex-start;
    margin-top: 0.25rem;
    min-height: auto;
    padding: 0;
    background: transparent;
    box-shadow: none;
    color: var(--green-panel);
    font-size: 0.9rem;
    font-weight: 700;
    gap: 0.45rem;
  }
  .svc-card .btn-soft .btn-ico {
    width: 1.55rem;
    height: 1.55rem;
    font-size: 0.65rem;
  }

  .sec-steps { padding: 2.15rem 0 3.25rem; }
  .steps-wrap { gap: 1.65rem; }
  .step-card {
    grid-template-columns: 2.75rem minmax(0, 1fr);
    gap: 0 0.8rem;
    padding: 0.95rem 0;
  }
  .step-num { font-size: 1.45rem; }
  .step-body h3 { font-size: 1.05rem; }
  .step-body p { font-size: 0.88rem; }

  .about-block {
    border-radius: 26px;
    padding: 1.35rem 1.15rem 1.5rem;
  }
  .about-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
  }
  .about-actions .btn {
    width: 100%;
    justify-content: center;
    padding-inline: 0.7rem;
  }
  .about-media,
  .about-media img {
    min-height: 220px;
    border-radius: 20px;
  }
  .about-lead { font-size: 0.95rem; }
  .check-list { gap: 0.85rem; }
  .why-block {
    border-radius: 26px;
    margin-top: -1.5rem;
    padding: 2.65rem 1.15rem 1.5rem;
  }
  .why-top { margin-bottom: 1.5rem; }
  .why-top .btn { width: 100%; justify-content: center; }
  .stats-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }
  .stat-card {
    border-right: 1px solid rgba(255, 255, 255, 0.28);
    border-bottom: none;
    padding: 0.15rem 0.55rem 0 0;
    text-align: left;
  }
  .stat-card:last-child {
    border-right: none;
    padding-right: 0;
  }
  .stat-num { font-size: 1.7rem; }
  .stat-lbl { font-size: 0.78rem; margin-top: 0.4rem; }

  .t-card {
    border-radius: 22px;
    padding: 1.25rem;
  }
  .t-logos {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.95rem 0.5rem;
    margin-bottom: 1.35rem;
    padding: 1rem 0.65rem 0.9rem;
    border-radius: 22px;
  }
  .t-logos li { font-size: 0.75rem; }
  .t-logos svg { width: 2.05rem; height: 2.05rem; }

  .quote-panel,
  .faq-panel {
    border-radius: 32px 22px 22px 22px;
    padding: 1.65rem 1.25rem;
  }
  .quote-lead { font-size: 0.98rem; margin-bottom: 1.35rem; }
  .quote-form {
    padding: 1.15rem;
    border-radius: 22px;
  }
  .quote-guarantee { margin-top: 0.15rem; }
  .qf-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .qf-actions .btn-dark {
    width: 100%;
    justify-content: center;
  }
  .faq-list { border-radius: 22px; }
  .faq-q {
    padding: 1.05rem 1.15rem;
    font-size: 0.95rem;
  }
  .faq-a { padding: 0 1.15rem 1.1rem; }
  .faq-intro .btn {
    width: 100%;
    justify-content: center;
    margin-right: 0;
    margin-bottom: 0.55rem;
  }
  .faq-intro .btn + .btn { margin-bottom: 0; }
  .tip-card .tip-body { padding: 0.95rem 1rem 1.1rem; }

  .gallery-item,
  .tip-card { border-radius: 18px; }

  /* Footer */
  .footer {
    padding-bottom: 5.5rem; /* room for fixed call buttons */
  }
  .footer-panel {
    border-radius: 28px 20px 0 0;
    padding: 1.7rem 1.15rem 0;
  }
  .footer-top,
  .footer-nav {
    grid-template-columns: 1fr;
    gap: 1.45rem;
  }
  .footer-heading-ghost { display: none; }
  .footer-mail { flex-wrap: nowrap; }
  .footer-mail input { min-width: 0; }
  .footer-bottom { flex-wrap: wrap; }
  .footer-brand { grid-column: auto; max-width: none; }
  .footer-brand-name .logo-name { font-size: 1.65rem; }
  .footer-tag { font-size: 0.9rem; margin-bottom: 1.05rem; }
  .footer-bottom {
    padding: 0.95rem 0 calc(1.1rem + env(safe-area-inset-bottom, 0px));
    font-size: 0.78rem;
  }

  .float-actions {
    right: max(0.75rem, env(safe-area-inset-right, 0px));
    bottom: max(0.75rem, env(safe-area-inset-bottom, 0px));
    gap: 0.45rem;
    width: auto;
  }
  .float-btn {
    width: 2.75rem;
    height: 2.75rem;
    display: flex;
    background: transparent;
    box-shadow: none;
    overflow: visible;
  }
  .float-btn i,
  .float-btn .zalo-mark {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    font-size: 0.86rem;
    box-shadow: 0 6px 16px rgba(33, 86, 232, 0.24);
  }
  .float-btn .zalo-mark { font-size: 0.56rem; }
  .float-label { display: none; }
}