:root {
  --blue:  #003B7A;
  --blue-dark: #002B67;
  --blue-deep: #001F4D;
  --blue-soft: #EEF4FA;
  --ink: #172631;
  --muted: #6F808C;
  --line: #DCE5EC;
  --paper: #F7FAFC;
  --white: #ffffff;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; color: var(--ink); background: var(--white); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }

.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(8px); }
.nav-wrap { height: 74px; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; background: var(--blue); color: white; font-weight: 700; border-radius: 4px; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.05; }
.brand-copy strong {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--blue-dark);
}

.brand-copy small {
  margin-top: 4px;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a { font-size: 14px; font-weight: 600; color: #40505b; }
.nav a:hover { color: var(--blue); }

.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; background: var(--blue); color: white; font-size: 14px; font-weight: 700; border-radius: 3px; }
.button:hover { background: var(--blue-dark); }
.button-small { min-height: 40px; padding: 0 16px; }
.menu-button { display: none; margin-left: auto; border: 0; background: transparent; font-size: 24px; }

.hero {
  background: linear-gradient(
    135deg,
    #f8fbfe 0%,
    #ffffff 50%,
    #f3f8fc 100%
  );
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 20px;
  align-items: center;

  min-height: 580px;
  padding: 55px 0;
}
.eyebrow { display: block; color: var(--blue); font-size: 11px; font-weight: 700; letter-spacing: .14em; margin-bottom: 18px; }
.hero h1, .section h2, .contact-section h2 { margin: 0; line-height: 1.08; letter-spacing: -.03em; }
.hero h1 {
  font-size: clamp(48px, 4.2vw, 62px);
  max-width: 620px;
  line-height: 1.02;
}
.hero-copy > p { max-width: 700px; margin: 24px 0 28px; font-size: 18px; color: var(--muted); }
.hero-actions { display: flex; align-items: center; gap: 22px; }
.text-link { color: var(--blue); font-weight: 700; font-size: 14px; }
.hero-specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; padding-top: 24px; border-top: 1px solid #cad8e3; }
.hero-specs strong, .hero-specs span { display: block; }
.hero-specs strong { font-size: 16px; }
.hero-specs span { color: var(--muted); font-size: 12px; margin-top: 3px; }

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.vessel-panel svg { width: 100%; display: block; }
.vessel-panel {
  width: 100%;
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
  overflow: visible;
}
.trust-bar { background: var(--blue-deep); color: white; }
.trust-row { min-height: 68px; display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; text-align: center; gap: 20px; font-size: 11px; font-weight: 700; letter-spacing: .08em; }

.section { padding: 95px 0; }
.section-soft { background: var(--paper); }
.section-heading { max-width: 760px; margin-bottom: 46px; }
.section-heading h2, .about-grid h2, .quality-grid h2 { font-size: clamp(34px, 4vw, 52px); }
.section-heading p { max-width: 620px; color: var(--muted); margin: 14px 0 0; }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { padding: 26px; border: 1px solid var(--line); background: white; min-height: 390px; }
.card-number { color: var(--blue); font-size: 11px; font-weight: 700; }
.card h3 { margin: 22px 0 10px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.product-shape { height: 180px; margin-top: 18px; display: flex; align-items: end; justify-content: center; }
.cylinders { gap: 9px; }
.cylinders span { display: block; background: linear-gradient(90deg, #9ca8b2, #edf2f5, #aab5bd); border-radius: 10px 10px 6px 6px; }
.cylinders span:nth-child(1) { width: 52px; height: 125px; }
.cylinders span:nth-child(2) { width: 44px; height: 100px; }
.cylinders span:nth-child(3) { width: 38px; height: 78px; }
.pressure-vessel, .process-tank { width: 120px; height: 135px; margin-left: auto; margin-right: auto; background: linear-gradient(90deg, #9ca8b2, #edf2f5, #aab5bd); border-radius: 35px 35px 12px 12px; align-self: center; }
.process-tank { border-radius: 12px; }
.custom { width: 150px; height: 110px; margin-left: auto; margin-right: auto; border: 1px solid #9bb7cf; background: linear-gradient(90deg, transparent 49%, #d0dfe9 50%, transparent 51%), linear-gradient(transparent 49%, #d0dfe9 50%, transparent 51%); background-size: 30px 30px; align-self: center; }

.application-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.application-item { display: grid; grid-template-columns: 54px 1fr; gap: 18px; align-items: start; padding: 24px; border: 1px solid var(--line); background: white; }
.application-item > span { width: 46px; height: 46px; display: grid; place-items: center; border: 1px solid var(--blue); color: var(--blue); font-weight: 700; }
.application-item h3 { margin: 0 0 6px; font-size: 19px; }
.application-item p { margin: 0; color: var(--muted); font-size: 14px; }

.capability-list { border-top: 1px solid var(--line); }
.capability-list > div { display: grid; grid-template-columns: 240px 1fr; gap: 24px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.capability-list strong { color: var(--blue-dark); }
.capability-list span { color: var(--muted); }

.section-blue { background: var(--blue-deep); color: white; }
.eyebrow-light { color: #8fc5f0; }
.quality-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.quality-items { border-top: 1px solid rgba(255,255,255,.24); }
.quality-items > div { padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.24); }
.quality-items strong, .quality-items span { display: block; }
.quality-items span { color: #afc4d4; font-size: 14px; margin-top: 2px; }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.about-copy { color: var(--muted); font-size: 17px; }
.about-copy p:first-child { color: var(--ink); }

.contact-section { padding: 80px 0; background: var(--blue); color: white; }
.contact-grid { display: grid; grid-template-columns: 1fr .8fr; gap: 80px; align-items: center; }
.contact-section h2 { font-size: clamp(34px, 4vw, 50px); }
.contact-section p { color: #d7e8f6; max-width: 600px; }
.contact-card { background: white; color: var(--ink); padding: 28px; }
.contact-card > div { padding: 16px 0; border-bottom: 1px solid var(--line); }
.contact-card span { display: block; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }
.contact-card a, .contact-card strong { display: inline-block; margin-top: 4px; }

footer { background: #081f36; color: #9fb5c6; padding: 28px 0; font-size: 12px; }
.footer-row { display: flex; justify-content: space-between; gap: 20px; }

@media (max-width: 920px) {
  .nav, .nav-wrap > .button { display: none; }
  .menu-button { display: block; }
  .nav.open { display: flex; position: absolute; top: 74px; left: 0; right: 0; padding: 22px; flex-direction: column; background: white; border-bottom: 1px solid var(--line); }
  .hero-grid, .quality-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-grid { padding: 72px 0; gap: 48px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-row { grid-template-columns: repeat(2, 1fr); padding: 18px 0; }
}

@media (max-width: 600px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 72px 0; }
  .hero h1 { font-size: 42px; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .hero-specs, .product-grid, .application-grid, .trust-row { grid-template-columns: 1fr; }
  .capability-list > div { grid-template-columns: 1fr; gap: 4px; }
  .footer-row { flex-direction: column; }
}


/* Product detail additions */
.card-link { position: relative; transition: transform .2s ease, box-shadow .2s ease; }
.card-link:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(12,63,115,.09); }
.card-cover { position: absolute; inset: 0; z-index: 2; }
.learn-more { display: inline-block; margin-top: 18px; color: var(--blue); font-size: 13px; font-weight: 700; }

.detail-hero {
  padding: 86px 0 72px;
  background: linear-gradient(180deg, #f8fbfe 0%, #eef5fb 100%);
  border-bottom: 1px solid var(--line);
}
.breadcrumb { font-size: 12px; color: var(--muted); margin-bottom: 28px; }
.breadcrumb a { color: var(--blue); }
.detail-hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center; }
.detail-hero h1 { margin: 0; font-size: clamp(42px, 5vw, 64px); line-height: 1.06; letter-spacing: -.035em; }
.detail-hero p { color: var(--muted); font-size: 18px; max-width: 680px; margin: 24px 0 0; }
.detail-visual {
  min-height: 420px; background: white; border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center; padding: 30px;
  box-shadow: 0 20px 50px rgba(20,72,112,.08);
}
.detail-visual .product-shape { transform: scale(1.45); }
.detail-section { padding: 84px 0; }
.detail-section.soft { background: var(--paper); }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.detail-section h2 { margin: 0 0 18px; font-size: clamp(30px, 4vw, 46px); line-height: 1.1; }
.detail-section p { color: var(--muted); }
.spec-table { border-top: 1px solid var(--line); }
.spec-row { display: grid; grid-template-columns: 220px 1fr; gap: 24px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.spec-row strong { color: var(--blue-dark); }
.spec-row span { color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 34px; }
.feature-box { padding: 24px; border: 1px solid var(--line); background: white; min-height: 150px; }
.feature-box strong { display: block; color: var(--blue-dark); margin-bottom: 8px; }
.feature-box p { margin: 0; font-size: 14px; }
.detail-note { padding: 24px; background: var(--blue-soft); border-left: 3px solid var(--blue); color: #3f5564; }
.back-products { display: inline-block; margin-top: 28px; color: var(--blue); font-weight: 700; }

@media (max-width: 920px) {
  .detail-hero-grid, .detail-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .feature-grid { grid-template-columns: 1fr; }
  .spec-row { grid-template-columns: 1fr; gap: 3px; }
}

.vessel-panel {
  width: 135%;
  height: auto;
  padding: 0;

  background: transparent;
  border: none;
  box-shadow: none;

  display: flex;
  align-items: center;
  justify-content: center;

  overflow: visible;

  margin-left: -7%;
}


.hero-product-image {
  display: block;

  width: 100%;
  max-width: none;
  height: auto;

  object-fit: contain;

  mix-blend-mode: multiply;
}

.product-image {
  width: 100%;
  height: 200px;
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-image img {
  max-width: 280px;
  max-height: 210px;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}

.cert-intro {
  max-width: 500px;
  margin-top: 20px;
  color: #afc4d4;
}

.certification-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.certification-item {
  min-height: 220px;
  padding: 28px;
  background: white;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  justify-content: space-between;
}
.ce-logo {
  transform: scale(1.56);
}

.certification-logo {
  width: 150px;
  height: 100px;
  object-fit: contain;
  object-position: center;
  display: block;
}

.certification-item strong {
  display: block;
  margin-top: 25px;
  color: var(--blue-dark);
  font-size: 18px;
}

.certification-item span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 13px;
}

.factory-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  margin-top: 26px;
  padding: 13px 22px;

  background: var(--blue);
  color: white;

  font-size: 14px;
  font-weight: 700;

  border-radius: 3px;
  transition: 0.2s ease;
}

.factory-button:hover {
  background: var(--blue-dark);
  transform: translateY(-2px);
}

.about-company-name {
  color: var(--blue-dark);
  font-size: 18px;
  font-weight: 700;
}

.contact-email-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  margin-top: 22px;
  padding: 13px 24px;

  background: white;
  color: var(--blue);

  font-size: 14px;
  font-weight: 700;

  border-radius: 3px;
  transition: 0.2s ease;
}

.contact-email-button:hover {
  background: #f2f6fa;
  transform: translateY(-2px);
}

.detail-product-image {
  width: 100%;
  height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.detail-product-image img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}

/* Cylinder Range */

.cylinder-range-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 22px;
}

/* First row: 3 products */
.cylinder-range-card {
  grid-column: span 2;
  width: 100%;
  background: white;
  border: 1px solid var(--line);
  overflow: hidden;
}

/* Second row: 2 products centered */
.cylinder-range-card:nth-child(4) {
  grid-column: 2 / span 2;
}

.cylinder-range-card:nth-child(5) {
  grid-column: 4 / span 2;
}


/* Product images */

.cylinder-range-image {
  width: 100%;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: white;
}

.cylinder-range-image img {
  width: 90%;
  height: 90%;
  object-fit: contain;
  display: block;
}


/* Product text */

.cylinder-range-content {
  padding: 24px;
}

.cylinder-range-content > span {
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
}

.cylinder-range-content h3 {
  margin: 10px 0 9px;
  font-size: 20px;
  color: var(--blue-dark);
}

.cylinder-range-content p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}


/* Tablet */

@media (max-width: 900px) {
  .cylinder-range-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cylinder-range-card,
  .cylinder-range-card:nth-child(4),
  .cylinder-range-card:nth-child(5) {
    grid-column: auto;
  }
}


/* Mobile */

@media (max-width: 600px) {
  .cylinder-range-grid {
    grid-template-columns: 1fr;
  }
}

/* Pressure Vessel Product Page */

.vessel-photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 36px;
}

.vessel-photo-card {
  background: white;
  border: 1px solid var(--line);
  padding-bottom: 24px;
}

.vessel-photo {
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #ffffff;
}

.vessel-photo img {
  width: 90%;
  height: 90%;
  object-fit: contain;
  display: block;
}

.vessel-photo-card h3 {
  margin: 20px 22px 8px;
  font-size: 20px;
  color: var(--blue-dark);
}

.vessel-photo-card p {
  margin: 0 22px;
  color: var(--muted);
  font-size: 14px;
}


/* Technical Table */

.technical-table-wrapper {
  margin-top: 34px;
  overflow-x: auto;
  border: 1px solid var(--line);
}

.technical-table {
  width: 100%;
  min-width: 1200px;
  border-collapse: collapse;
  background: white;
}

.technical-table th {
  padding: 16px 14px;
  background: var(--blue-deep);
  color: white;
  font-size: 12px;
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
}

.technical-table td {
  padding: 18px 14px;
  border-top: 1px solid var(--line);
  color: var(--ink);
  font-size: 14px;
  white-space: nowrap;
}

.technical-table tbody tr:hover {
  background: #f7fbff;
}

.spec-note {
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}


/* Responsive */

@media (max-width: 900px) {
  .vessel-photo-grid {
    grid-template-columns: 1fr;
  }

  .vessel-photo {
    height: 360px;
  }
}

/* Wheeled Extinguisher Page */

.wheeled-photo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.wheeled-photo-card {
  background: white;
  border: 1px solid var(--line);
  padding-bottom: 24px;
}

.wheeled-photo {
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: white;
}

.wheeled-photo img {
  width: 90%;
  height: 90%;
  object-fit: contain;
  display: block;
}

.wheeled-photo-card h3 {
  margin: 20px 22px 8px;
  font-size: 20px;
  color: var(--blue-dark);
}

.wheeled-photo-card p {
  margin: 0 22px;
  color: var(--muted);
  font-size: 14px;
}


/* Common Specifications */

.common-spec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 30px;
  margin-bottom: 28px;
}

.common-spec-grid > div {
  padding: 20px;
  background: white;
  border: 1px solid var(--line);
}

.common-spec-grid strong {
  display: block;
  color: var(--blue-dark);
  font-size: 13px;
  margin-bottom: 5px;
}

.common-spec-grid span {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 800px) {
  .wheeled-photo-grid,
  .common-spec-grid {
    grid-template-columns: 1fr;
  }
}

/* Storage Tank Detail Page */

.storage-photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 36px;
}

.storage-photo-card {
  background: white;
  border: 1px solid var(--line);
  padding-bottom: 24px;
}

.storage-photo {
  width: 100%;
  height: 330px;

  display: flex;
  align-items: center;
  justify-content: center;

  overflow: hidden;
  background: white;
}

.storage-photo img {
  width: 92%;
  height: 92%;

  object-fit: contain;
  display: block;
}

.storage-photo-card h3 {
  margin: 20px 22px 8px;

  font-size: 20px;
  color: var(--blue-dark);
}

.storage-photo-card p {
  margin: 0 22px;

  color: var(--muted);

  font-size: 14px;
  line-height: 1.6;
}


@media (max-width: 900px) {

  .storage-photo-grid {
    grid-template-columns: 1fr;
  }

  .storage-photo {
    height: 380px;
  }

}

/* Customized Vessels Page */

.customized-main-image {
  width: 100%;
  height: 500px;

  display: flex;
  align-items: center;
  justify-content: center;

  overflow: hidden;
  background: white;
  border: 1px solid var(--line);

  box-shadow: 0 20px 50px rgba(20, 72, 112, 0.08);
}

.customized-main-image img {
  width: 100%;
  height: 100%;

  object-fit: contain;
  display: block;
}


/* Introduction */

.customized-intro {
  max-width: 720px;
  margin: 0 0 40px;

  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}


/* Customization options */

.customized-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.customized-options > div {
  padding: 26px 22px;

  background: white;
  border: 1px solid var(--line);
}

.customized-options span {
  display: block;

  margin-bottom: 18px;

  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
}

.customized-options strong {
  display: block;

  margin-bottom: 9px;

  color: var(--blue-dark);
  font-size: 17px;
}

.customized-options p {
  margin: 0;

  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}


/* CTA */

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

.customized-cta h2 {
  margin-bottom: 14px;
}

.customized-cta > p {
  max-width: 560px;

  margin: 0 auto 26px;

  color: var(--muted);
}

.customized-cta .back-products {
  margin-top: 28px;
}


/* Responsive */

@media (max-width: 900px) {

  .customized-options {
    grid-template-columns: repeat(2, 1fr);
  }

  .customized-main-image {
    height: 420px;
  }

}

@media (max-width: 600px) {

  .customized-options {
    grid-template-columns: 1fr;
  }

}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.header-logo {
  width: 260px;
  height: auto;
  display: block;
  object-fit: contain;
}