:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #5d6a78;
  --line: #d9e0e8;
  --surface: #ffffff;
  --soft: #f2f6fa;
  --blue: #1758a6;
  --blue-dark: #0d376d;
  --yellow: #f4c430;
  --green: #2f7d58;
  --shadow: 0 18px 45px rgba(23, 33, 43, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(217, 224, 232, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--green));
  border-radius: 6px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 15px;
}

.main-nav a,
.site-footer a {
  text-decoration: none;
}

.main-nav a:hover,
.site-footer a:hover {
  color: var(--blue);
}

.header-actions {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
}

select {
  min-width: 132px;
  height: 40px;
  padding: 0 12px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.icon-link {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: var(--ink);
  background: #fff;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
}

.quick-contact {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 30;
  display: grid;
  width: min(320px, 86vw);
  gap: 8px;
  padding: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.quick-contact[hidden] {
  display: none;
}

.quick-contact a {
  padding: 10px 12px;
  color: var(--blue-dark);
  background: #f6f9fc;
  border-radius: 6px;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.hero {
  position: relative;
  min-height: 680px;
  display: grid;
  align-items: end;
  overflow: hidden;
  background: #0f1c2b;
}

.hero-video,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-video {
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(7, 18, 31, 0.86) 0%, rgba(7, 18, 31, 0.62) 46%, rgba(7, 18, 31, 0.28) 100%),
    linear-gradient(0deg, rgba(7, 18, 31, 0.72), rgba(7, 18, 31, 0.08) 55%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(980px, calc(100% - 36px));
  padding: 110px 0 210px clamp(18px, 4vw, 56px);
  color: #fff;
}

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

.hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(36px, 6vw, 68px);
  line-height: 1.05;
}

.hero-copy {
  max-width: 710px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 6px;
  font-weight: 800;
  text-decoration: none;
}

.btn.primary {
  color: #122033;
  background: var(--yellow);
}

.btn.secondary {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.55);
}

.hero-panel {
  position: absolute;
  right: clamp(18px, 4vw, 56px);
  bottom: 28px;
  left: clamp(18px, 4vw, 56px);
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.13);
  backdrop-filter: blur(16px);
}

.hero-panel div {
  padding: 22px;
  background: rgba(13, 31, 50, 0.42);
}

.hero-panel strong,
.hero-panel span {
  display: block;
}

.hero-panel strong {
  font-size: 28px;
}

.hero-panel span {
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.section {
  padding: 82px clamp(18px, 4vw, 56px);
}

.section-head {
  max-width: 760px;
  margin-bottom: 32px;
}

.section-head.wide {
  max-width: 980px;
}

.section h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.12;
}

.section-head p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
}

.intro-band {
  background: var(--soft);
}

.feature-grid,
.product-grid,
.solution-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-grid article,
.solution-list article {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.feature-icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  margin-bottom: 18px;
  color: var(--blue);
  background: #e8f1fb;
  border-radius: 6px;
  font-weight: 900;
}

.feature-grid h3,
.solution-list h3 {
  margin: 0 0 8px;
}

.feature-grid p,
.solution-list p,
.quality-copy p,
.contact-section p,
.detail-copy p {
  color: var(--muted);
}

.product-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.product-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  padding: 18px;
  background: linear-gradient(180deg, #f7f9fc, #fff);
}

.product-body {
  padding: 22px;
  border-top: 1px solid var(--line);
}

.tag {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 5px 9px;
  color: var(--blue-dark);
  background: #e8f1fb;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 800;
}

.product-body h3 {
  min-height: 58px;
  margin: 0 0 10px;
  font-size: 21px;
  line-height: 1.28;
}

.product-body p {
  min-height: 96px;
  margin: 0 0 18px;
  color: var(--muted);
}

.specs-gallery {
  background: #f8fafc;
  border-top: 1px solid var(--line);
}

.spec-gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.spec-gallery-grid article {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.spec-gallery-grid h3 {
  margin: 0;
  padding: 14px 16px;
  background: #102235;
  color: #fff;
  font-size: 18px;
}

.spec-gallery-grid div {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
}

.spec-gallery-grid img {
  width: 100%;
  height: 260px;
  object-fit: contain;
  padding: 12px;
  background: #fff;
}

dl {
  display: grid;
  grid-template-columns: 108px 1fr;
  gap: 8px 14px;
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  font-weight: 700;
}

.detail-band {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 42px;
  align-items: center;
  background: #132437;
  color: #fff;
}

.detail-copy p {
  color: rgba(255, 255, 255, 0.76);
}

.spec-table-wrap {
  overflow-x: auto;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  background: #fff;
  color: var(--ink);
}

th,
td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  color: #fff;
  background: var(--blue);
}

.solution-list {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.quality {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: start;
  background: var(--soft);
}

.quality-copy ul {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding-left: 20px;
}

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

.certificate-grid figure {
  display: grid;
  grid-template-rows: 1fr auto;
  min-height: 250px;
  margin: 0;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(23, 33, 43, 0.08);
}

.certificate-grid .certificate-feature {
  grid-column: span 2;
  min-height: 310px;
}

.certificate-grid img {
  width: 100%;
  height: 210px;
  object-fit: contain;
  padding: 14px;
  background: #fff;
}

.certificate-grid .certificate-feature img {
  height: 270px;
}

.certificate-grid figcaption {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 12px;
  color: var(--ink);
  background: #f5f8fb;
  border-top: 1px solid var(--line);
  font-size: 13px;
  font-weight: 800;
}

.contact-section {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 36px;
  align-items: center;
}

.contact-card {
  display: grid;
  gap: 12px;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.contact-card a {
  min-height: 46px;
  display: flex;
  align-items: center;
  padding: 10px 14px;
  color: var(--blue-dark);
  background: #f6f9fc;
  border: 1px solid var(--line);
  border-radius: 6px;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.contact-card span {
  display: block;
  padding: 10px 14px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px clamp(18px, 4vw, 56px);
  color: #dbe6f2;
  background: #0f1c2b;
}

.site-footer p {
  margin: 6px 0 0;
  color: #aab8c7;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  align-content: start;
}

.policy-page {
  max-width: 960px;
  margin: 0 auto;
  padding: 72px 18px;
}

.policy-page h1 {
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.08;
}

.policy-page section {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.policy-page p,
.policy-page li {
  color: var(--muted);
}

@media (max-width: 980px) {
  .site-header {
    flex-wrap: wrap;
  }

  .main-nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    min-height: 720px;
  }

  .hero-content {
    padding-bottom: 240px;
  }

  .feature-grid,
  .product-grid,
  .solution-list,
  .detail-band,
  .quality,
  .contact-section,
  .spec-gallery-grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 680px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand {
    min-width: 0;
  }

  .brand small {
    display: none;
  }

  .header-actions {
    width: 100%;
  }

  select {
    flex: 1;
  }

  .hero {
    min-height: 760px;
  }

  .hero-content {
    width: 100%;
    padding: 80px 18px 280px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .hero-panel {
    grid-template-columns: 1fr;
    right: 18px;
    left: 18px;
  }

  .hero-panel div {
    padding: 16px;
  }

  .section {
    padding: 58px 18px;
  }

  .feature-grid,
  .product-grid,
  .solution-list,
  .detail-band,
  .quality,
  .contact-section,
  .certificate-grid,
  .spec-gallery-grid {
    grid-template-columns: 1fr;
  }

  .certificate-grid .certificate-feature {
    grid-column: span 1;
  }

  .certificate-grid img,
  .certificate-grid .certificate-feature img {
    height: 230px;
  }

  .spec-gallery-grid img {
    height: 210px;
  }

  .product-body h3,
  .product-body p {
    min-height: 0;
  }

  dl {
    grid-template-columns: 96px 1fr;
  }

  .site-footer {
    display: grid;
  }
}