:root {
  --blue: #1761a7;
  --blue-dark: #0b3765;
  --cyan: #1fb3df;
  --green: #63bb35;
  --ink: #162033;
  --muted: #64748b;
  --line: #dbe7f2;
  --soft: #f4f9fc;
  --white: #ffffff;
  --aqua-soft: rgba(31, 179, 223, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  background:
    radial-gradient(circle at 7% 12%, rgba(31, 179, 223, 0.08), transparent 24%),
    radial-gradient(circle at 93% 38%, rgba(99, 187, 53, 0.07), transparent 22%),
    var(--white);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand img {
  width: 170px;
  border: 1px solid var(--line);
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 20px;
  color: var(--blue-dark);
  font-size: 15px;
  font-weight: 700;
}

.main-nav a:hover {
  color: var(--green);
}

.lang-toggle {
  flex: 0 0 auto;
  min-height: 38px;
  padding: 8px 14px;
  color: var(--white);
  font-weight: 800;
  border: 0;
  border-radius: 6px;
  background: var(--blue);
  cursor: pointer;
}

.lang-toggle:hover {
  background: var(--green);
}

.hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  align-items: center;
  gap: clamp(32px, 6vw, 76px);
  min-height: calc(100vh - 82px);
  padding: clamp(48px, 8vw, 96px) clamp(20px, 5vw, 72px);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.12) 0 10%, transparent 10% 22%, rgba(255, 255, 255, 0.08) 22% 33%, transparent 33%),
    radial-gradient(circle at 18% 74%, rgba(204, 242, 184, 0.14), transparent 22%),
    radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.25), transparent 30%),
    linear-gradient(120deg, rgba(8, 61, 112, 0.98), rgba(31, 179, 223, 0.82));
  color: var(--white);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.water-orb {
  position: absolute;
  width: clamp(140px, 18vw, 280px);
  aspect-ratio: 1;
  border-radius: 55% 45% 62% 38% / 46% 58% 42% 54%;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background:
    radial-gradient(circle at 34% 28%, rgba(255, 255, 255, 0.65), transparent 13%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.2), rgba(31, 179, 223, 0.12));
  filter: blur(0.1px);
  opacity: 0.7;
  pointer-events: none;
}

.water-orb-one {
  top: 13%;
  right: 5%;
}

.water-orb-two {
  bottom: 8%;
  left: 42%;
  width: clamp(90px, 10vw, 160px);
  opacity: 0.42;
}

.wave-divider {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 88px;
  color: #ffffff;
  pointer-events: none;
}

.wave-divider svg {
  display: block;
  width: 100%;
  height: 100%;
}

.wave-divider path {
  fill: currentColor;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #ccf2b8;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.03;
}

h2 {
  margin-bottom: 18px;
  color: var(--blue-dark);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.12;
}

h3 {
  margin-bottom: 10px;
  color: var(--blue-dark);
  font-size: 22px;
}

.hero-copy {
  max-width: 680px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 19px;
}

.seo-copy {
  max-width: 700px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  font-weight: 700;
}

.zh {
  font-family: Arial, "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}

.hero-zh,
.section-subtitle {
  color: var(--blue);
  font-size: 18px;
  font-weight: 800;
}

.hero .hero-zh,
.hero .zh {
  color: rgba(255, 255, 255, 0.9);
}

.card-label {
  margin-bottom: 8px;
  color: var(--green) !important;
  font-size: 15px;
  font-weight: 800;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.consumer-note {
  max-width: 640px;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 15px;
}

.button,
.contact-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border: 0;
  border-radius: 6px;
  font-weight: 800;
  cursor: pointer;
}

.button.primary,
.contact-form button {
  color: var(--white);
  background: var(--green);
}

.button.secondary {
  color: var(--white);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.9);
}

.hero-visual {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
}

.hero-visual img {
  width: min(560px, 84vw);
  padding: 22px;
  background: rgba(255, 255, 255, 0.94);
  border-radius: 8px;
  box-shadow: 0 28px 80px rgba(11, 55, 101, 0.28);
}

.hero-visual::before,
.hero-visual::after {
  content: "";
  position: absolute;
  z-index: -1;
  border-radius: 999px;
  pointer-events: none;
}

.hero-visual::before {
  width: min(520px, 78vw);
  height: min(520px, 78vw);
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22), transparent 62%);
}

.hero-visual::after {
  width: min(410px, 62vw);
  height: min(140px, 22vw);
  border: 1px solid rgba(255, 255, 255, 0.35);
  transform: rotate(-13deg);
}

.product-hero img {
  object-fit: contain;
}

.section {
  position: relative;
  padding: clamp(56px, 8vw, 96px) clamp(20px, 5vw, 72px);
}

.section-heading {
  position: relative;
  z-index: 1;
}

.section-heading::after {
  content: "";
  display: block;
  width: 96px;
  height: 8px;
  margin-top: 18px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 13% 50%, var(--cyan) 0 5px, transparent 6px),
    linear-gradient(90deg, var(--blue), var(--cyan), var(--green));
}

.split-section {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 6vw, 72px);
}

.section-copy {
  color: var(--muted);
  font-size: 18px;
}

.consumer-section {
  overflow: hidden;
  background:
    radial-gradient(circle at 91% 18%, rgba(31, 179, 223, 0.12), transparent 20%),
    #ffffff;
}

.consumer-section::before {
  content: "";
  position: absolute;
  right: clamp(18px, 5vw, 72px);
  top: 36px;
  width: 140px;
  height: 140px;
  border-radius: 50% 50% 48% 52% / 58% 44% 56% 42%;
  background: linear-gradient(145deg, rgba(31, 179, 223, 0.16), rgba(255, 255, 255, 0));
}

.consumer-section .section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.consumer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.consumer-grid article {
  position: relative;
  overflow: hidden;
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(243, 250, 255, 0.95)),
    #ffffff;
  box-shadow: 0 16px 40px rgba(11, 55, 101, 0.08);
}

.consumer-grid article::after,
.water-grid article::after,
.tech-grid article::after {
  content: "";
  position: absolute;
  right: -22px;
  bottom: -28px;
  width: 86px;
  height: 112px;
  border-radius: 54% 46% 58% 42% / 48% 60% 40% 52%;
  background: linear-gradient(145deg, rgba(31, 179, 223, 0.14), rgba(255, 255, 255, 0.02));
  transform: rotate(24deg);
}

.consumer-grid h3 {
  position: relative;
  z-index: 1;
  font-size: 20px;
}

.consumer-grid p {
  position: relative;
  z-index: 1;
  color: var(--muted);
}

.water-importance-section {
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(243, 250, 255, 0.96)),
    radial-gradient(circle at 20% 8%, rgba(31, 179, 223, 0.16), transparent 26%);
}

.water-importance-section::before {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 120px;
  background:
    radial-gradient(80% 52px at 50% 100%, rgba(31, 179, 223, 0.12), transparent 70%);
}

.water-importance-section .section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.water-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.water-grid article {
  position: relative;
  overflow: hidden;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 16px 40px rgba(11, 55, 101, 0.08);
}

.water-grid h3 {
  position: relative;
  z-index: 1;
  font-size: 20px;
}

.water-grid p {
  position: relative;
  z-index: 1;
  color: var(--muted);
}

.terahertz-section {
  overflow: hidden;
  background:
    linear-gradient(115deg, transparent 0 42%, rgba(31, 179, 223, 0.07) 42% 48%, transparent 48%),
    radial-gradient(circle at 12% 15%, rgba(31, 179, 223, 0.13), transparent 34%),
    linear-gradient(180deg, #ffffff, #f8fbfd);
}

.terahertz-section::after {
  content: "";
  position: absolute;
  right: -80px;
  top: 80px;
  width: 280px;
  height: 280px;
  border: 1px solid rgba(31, 179, 223, 0.18);
  border-radius: 55% 45% 60% 40% / 45% 58% 42% 55%;
}

.terahertz-section .section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.terahertz-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.terahertz-grid article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 16px 40px rgba(11, 55, 101, 0.08);
}

.terahertz-grid h3 {
  font-size: 20px;
}

.terahertz-grid p {
  color: var(--muted);
}

.product-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  background: linear-gradient(180deg, #ffffff, var(--soft));
}

.product-media {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 14px;
  align-items: center;
}

.product-media img {
  width: 100%;
  height: 100%;
  max-height: 620px;
  object-fit: contain;
  padding: 14px;
  border-radius: 8px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 24px 70px rgba(11, 55, 101, 0.16);
}

.product-media img,
.dispenser-media img,
.mini-gallery img,
.quantum-media img,
.photo-showcase img {
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.product-media img:hover,
.dispenser-media img:hover,
.mini-gallery img:hover,
.quantum-media img:hover,
.photo-showcase img:hover {
  transform: translateY(-3px);
  box-shadow: 0 26px 72px rgba(11, 55, 101, 0.18);
}

.product-copy p {
  color: var(--muted);
  font-size: 18px;
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 28px 0 18px;
}

.benefit-grid div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.product-section::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 14px;
  background: linear-gradient(90deg, transparent, rgba(31, 179, 223, 0.35), transparent);
}

.benefit-grid strong {
  display: block;
  margin-bottom: 6px;
  color: var(--blue-dark);
}

.benefit-grid span {
  display: block;
  color: var(--muted);
}

.product-facts {
  margin-top: 24px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fbfd;
}

.product-facts h3 {
  margin-bottom: 14px;
  font-size: 20px;
}

.product-facts ul {
  margin: 0;
  padding-left: 18px;
}

.product-facts li {
  margin: 10px 0;
  color: var(--muted);
  line-height: 1.6;
}

.disclaimer {
  padding: 14px 16px;
  border-left: 4px solid var(--green);
  background: #eef8ed;
  font-size: 14px !important;
}

.dispenser-section {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  background: var(--white);
}

.dispenser-copy p {
  color: var(--muted);
  font-size: 18px;
}

.dispenser-media {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(120px, 0.62fr);
  gap: 14px;
  align-items: end;
}

.dispenser-media img {
  width: 100%;
  height: 100%;
  max-height: 560px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 20px 60px rgba(11, 55, 101, 0.12);
}

.dispenser-media img:nth-child(3) {
  grid-column: 1 / -1;
  max-height: 360px;
  object-position: center 38%;
}

.temperature-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 28px;
}

.temperature-list div {
  padding: 15px;
  border-radius: 8px;
  background: linear-gradient(180deg, #eef8ff, #ffffff);
  border: 1px solid var(--line);
}

.temperature-list strong {
  display: block;
  color: var(--blue);
  font-size: 22px;
}

.temperature-list span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.tech-section {
  background: var(--soft);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.tech-grid article {
  padding: 22px;
  border-radius: 8px;
  background: var(--white);
  border: 1px solid var(--line);
}

.tech-grid h3 {
  font-size: 19px;
}

.tech-grid p {
  color: var(--muted);
}

.mini-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  background:
    radial-gradient(circle at 10% 20%, rgba(31, 179, 223, 0.12), transparent 34%),
    #ffffff;
}

.mini-gallery {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 14px;
  align-items: center;
}

.mini-gallery img {
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 18px 50px rgba(11, 55, 101, 0.11);
}

.mini-gallery img:nth-child(2) {
  grid-column: 1 / -1;
}

.mini-gallery img:nth-child(4) {
  grid-column: 1 / -1;
  max-height: 420px;
  object-position: center 62%;
}

.mini-copy p {
  color: var(--muted);
  font-size: 18px;
}

.mini-points {
  display: grid;
  gap: 12px;
  margin: 26px 0 18px;
}

.mini-points div {
  padding: 16px 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: linear-gradient(90deg, #f7fbff, #ffffff);
}

.mini-points strong {
  display: block;
  color: var(--blue-dark);
}

.mini-points span {
  display: block;
  color: var(--muted);
}

.ideal-users {
  padding: 16px 18px;
  border-radius: 8px;
  background: var(--blue-dark);
  color: var(--white) !important;
}

.quantum-section {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(280px, 0.98fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  background:
    radial-gradient(circle at 80% 10%, rgba(99, 187, 53, 0.14), transparent 32%),
    linear-gradient(180deg, #ffffff, #f8fbfd);
}

.quantum-copy p {
  color: var(--muted);
  font-size: 18px;
}

.symptom-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 24px 0;
}

.symptom-grid div {
  padding: 14px 16px;
  color: var(--blue-dark);
  font-weight: 800;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eef8ff;
}

.quantum-benefits {
  display: grid;
  gap: 12px;
}

.quantum-benefits div {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.quantum-benefits strong {
  display: block;
  color: var(--blue-dark);
}

.quantum-benefits span {
  display: block;
  color: var(--muted);
}

.tagline {
  margin-top: 22px;
  color: var(--green) !important;
  font-weight: 800;
}

.quantum-media {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.quantum-media img {
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f5f5f5;
  box-shadow: 0 20px 60px rgba(11, 55, 101, 0.12);
}

.quantum-media img:nth-child(3) {
  grid-column: 1 / -1;
}

.quantum-media img:nth-child(4),
.quantum-media img:nth-child(5) {
  max-height: 480px;
}

.mission-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  padding: 0;
  background: var(--line);
}

.mission-band > div {
  min-height: 270px;
  padding: clamp(32px, 5vw, 64px);
  background: var(--soft);
}

.mission-band span {
  display: block;
  margin-bottom: 14px;
  color: var(--green);
  font-weight: 800;
  text-transform: uppercase;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 250px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.feature-card p,
.partner-copy p,
.partner-list p,
.site-footer p {
  color: var(--muted);
}

.partner-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 6vw, 72px);
  background: var(--blue-dark);
}

.partner-section h2,
.contact-section h2 {
  color: var(--white);
}

.partner-copy p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 18px;
}

.partner-list {
  display: grid;
  gap: 14px;
}

.partner-list div {
  padding: 24px;
  border-radius: 8px;
  background: var(--white);
}

.partner-list strong {
  display: block;
  margin-bottom: 8px;
  color: var(--blue);
  font-size: 18px;
}

.assurance-section {
  overflow: hidden;
  background:
    radial-gradient(circle at 80% 18%, rgba(31, 179, 223, 0.12), transparent 22%),
    linear-gradient(180deg, #ffffff, #f3faff);
}

.assurance-section .section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.certificate-section {
  overflow: hidden;
  background: linear-gradient(180deg, #ffffff, #f8fbfd);
}

.certificate-section::before {
  content: "";
  position: absolute;
  left: -120px;
  top: 110px;
  width: 260px;
  height: 260px;
  border-radius: 49% 51% 62% 38% / 51% 44% 56% 49%;
  background: linear-gradient(145deg, rgba(31, 179, 223, 0.12), transparent);
}

.certificate-section .section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.certificate-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  max-width: 1100px;
  margin: 0 auto;
}

.certificate-grid figure {
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fbfd;
  box-shadow: 0 16px 40px rgba(11, 55, 101, 0.08);
}

.certificate-grid img {
  width: 100%;
  height: 100%;
  max-height: 620px;
  object-fit: contain;
  border-radius: 6px;
  background: #ffffff;
}

.certificate-grid figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.assurance-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.assurance-grid article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 16px 40px rgba(11, 55, 101, 0.08);
}

.assurance-grid h3 {
  font-size: 20px;
}

.assurance-grid p {
  color: var(--muted);
}

.values {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.values div {
  padding: 24px;
  color: var(--white);
  font-weight: 800;
  text-align: center;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
}

.media-section {
  overflow: hidden;
  background:
    radial-gradient(circle at 12% 14%, rgba(31, 179, 223, 0.13), transparent 25%),
    linear-gradient(180deg, #ffffff, var(--soft));
}

.media-section::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: 8%;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(31, 179, 223, 0.12), transparent 68%);
}

.media-section .section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.media-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: clamp(24px, 5vw, 56px);
  align-items: start;
}

.photo-showcase {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.photo-showcase img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 18px 45px rgba(11, 55, 101, 0.1);
}

.video-list {
  display: grid;
  gap: 14px;
}

.video-list article {
  position: relative;
  padding: 22px 22px 22px 64px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.video-card.featured-video {
  position: relative;
  overflow: hidden;
  padding: 22px;
}

.video-card.featured-video::before {
  display: block;
  content: "";
  position: absolute;
  right: -32px;
  top: -34px;
  width: 104px;
  height: 124px;
  border-radius: 55% 45% 60% 40% / 46% 58% 42% 54%;
  background: linear-gradient(145deg, rgba(31, 179, 223, 0.12), rgba(255, 255, 255, 0.02));
}

.video-card video {
  width: 100%;
  margin: 4px 0 18px;
  border-radius: 8px;
  background: #000000;
}

.video-list article::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 26px;
  width: 0;
  height: 0;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  border-left: 18px solid var(--green);
}

.video-list span {
  display: block;
  margin-bottom: 8px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.video-list p {
  color: var(--muted);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 6vw, 72px);
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 16%, rgba(255, 255, 255, 0.16), transparent 20%),
    linear-gradient(135deg, var(--blue), var(--cyan));
}

.contact-details {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.contact-details a {
  display: inline-flex;
  width: fit-content;
  padding: 11px 14px;
  color: var(--white);
  font-weight: 800;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.12);
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 28px;
  border-radius: 8px;
  background: var(--white);
}

.contact-form label {
  display: grid;
  gap: 7px;
  color: var(--blue-dark);
  font-weight: 800;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 13px 14px;
  color: var(--ink);
  font: inherit;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.whatsapp-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  color: var(--blue-dark);
  font-weight: 800;
  border: 2px solid var(--green);
  border-radius: 6px;
  background: var(--white);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(20px, 5vw, 72px);
  background: #071f39;
  color: var(--white);
}

.site-footer p {
  margin: 6px 0 0;
}

.site-footer a {
  color: #ccf2b8;
  font-weight: 800;
}

@media (max-width: 860px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .product-section,
  .dispenser-section,
  .mini-section,
  .quantum-section,
  .split-section,
  .mission-band,
  .feature-grid,
  .consumer-grid,
  .water-grid,
  .terahertz-grid,
  .tech-grid,
  .partner-section,
  .assurance-grid,
  .certificate-grid,
  .values,
  .media-layout,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .brand img {
    width: 150px;
  }

  .temperature-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .main-nav {
    gap: 12px;
    font-size: 14px;
  }

  h1 {
    font-size: 38px;
  }

  .hero-copy,
  .section-copy,
  .consumer-section .section-heading p:not(.eyebrow),
  .water-importance-section .section-heading p:not(.eyebrow),
  .terahertz-section .section-heading p:not(.eyebrow),
  .assurance-section .section-heading p:not(.eyebrow),
  .certificate-section .section-heading p:not(.eyebrow),
  .media-section .section-heading p:not(.eyebrow),
  .partner-copy p,
  .product-copy p,
  .dispenser-copy p,
  .mini-copy p,
  .quantum-copy p {
    font-size: 16px;
  }

  .benefit-grid,
  .product-media,
  .dispenser-media,
  .temperature-list,
  .mini-gallery,
  .symptom-grid,
  .quantum-media,
  .photo-showcase {
    grid-template-columns: 1fr;
  }

  .mini-gallery img:nth-child(2),
  .quantum-media img:nth-child(3) {
    grid-column: auto;
  }
}