* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: #1d2a36;
  background: #fff;
  font-family: Arial, Helvetica, sans-serif;
}

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

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

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  background: #2f536f;
  color: #dce7ef;
  font-size: 13px;
}

.topbar-inner {
  height: 34px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.phone {
  color: #fff;
  font-weight: 700;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid #e5ecf1;
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav-wrap {
  height: 86px;
  display: grid;
  grid-template-columns: 170px 1fr auto;
  gap: 22px;
  align-items: center;
}

.brand img {
  width: 140px;
  max-height: 62px;
  object-fit: contain;
  object-position: left center;
}

.main-nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 6px;
}

.main-nav a {
  padding: 32px 13px;
  color: #22384a;
  font-size: 15px;
  font-weight: 700;
  border-bottom: 3px solid transparent;
}

.main-nav a:hover {
  color: #1b77ac;
  border-color: #1b77ac;
}

.nav-cta {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  background: #1b77ac;
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
}

.hero {
  min-height: 500px;
  position: relative;
  overflow: hidden;
  background: #b8ced1;
}

.hero-track {
  height: 500px;
  display: flex;
  width: 300%;
  animation: slide 16s infinite;
}

.hero-track img {
  width: 33.333%;
  height: 500px;
  object-fit: cover;
}

@keyframes slide {
  0%, 28% { transform: translateX(0); }
  34%, 62% { transform: translateX(-33.333%); }
  68%, 95% { transform: translateX(-66.666%); }
  100% { transform: translateX(0); }
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(9, 34, 54, .78), rgba(9, 34, 54, .34), rgba(9, 34, 54, .06));
}

.hero-copy {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: max(32px, calc((100vw - 1180px) / 2));
  width: min(610px, calc(100% - 64px));
  transform: translateY(-50%);
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  color: #bfe4f5;
  font-weight: 800;
  letter-spacing: 2px;
  font-size: 13px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: 46px;
  line-height: 1.12;
  letter-spacing: 0;
}

.hero p {
  font-size: 17px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 26px;
}

.hero-actions a,
.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 20px;
  background: #1b77ac;
  color: #fff;
  font-weight: 800;
  border: 1px solid #1b77ac;
}

.hero-actions .ghost {
  background: rgba(255,255,255,.12);
  border-color: rgba(255,255,255,.7);
}

section {
  padding: 72px 0;
}

.section-title {
  margin-bottom: 30px;
}

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

.section-title p {
  margin: 0 0 8px;
  color: #1b77ac;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 2px;
}

.section-title h2 {
  margin: 0;
  color: #183348;
  font-size: 32px;
  line-height: 1.25;
}

.about {
  background: #fff;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: stretch;
}

.about-card {
  border: 1px solid #dce5ec;
  padding: 28px;
  background: #fff;
}

.about-card.primary {
  border-top: 4px solid #1b77ac;
}

.about-card.full {
  grid-column: 1 / -1;
  background: #f7fafc;
}

.about-card h3,
.quality-cards h3,
.application-grid h3,
.product-grid h3,
.footer h3 {
  margin: 0 0 12px;
  color: #153147;
}

.about-card p,
.quality-cards p,
.application-grid p,
.news p,
.footer p {
  margin: 0 0 14px;
  line-height: 1.72;
  color: #5a6874;
}

.stats {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: #dce5ec;
  border: 1px solid #dce5ec;
}

.stats div {
  padding: 24px;
  background: #f4f8fb;
  text-align: center;
}

.stats strong {
  display: block;
  color: #1b77ac;
  font-size: 27px;
  margin-bottom: 6px;
}

.stats span {
  color: #506170;
  font-weight: 700;
}

.applications {
  background: #eef4f7;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.application-grid article {
  background: #fff;
  box-shadow: 0 10px 26px rgba(20, 48, 70, .08);
}

.application-grid img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.application-grid div {
  padding: 24px;
}

.card-link {
  display: inline-flex;
  margin-top: 6px;
  color: #1b77ac;
  font-weight: 800;
}

.products {
  background: #fff;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.product-grid article {
  background: #f8fbfd;
  border: 1px solid #dce5ec;
  text-align: center;
  transition: transform .18s ease, box-shadow .18s ease;
}

.product-grid article:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(20, 48, 70, .12);
}

.product-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #fff;
}

.product-grid h3 {
  font-size: 16px;
  padding: 16px 10px 6px;
  margin: 0;
}

.product-grid p {
  min-height: 48px;
  margin: 0;
  padding: 0 14px 18px;
  color: #5a6874;
  font-size: 13px;
  line-height: 1.45;
}

.quality {
  background: linear-gradient(135deg, #153147, #2f536f);
  color: #fff;
}

.quality .section-title h2,
.quality .section-title p {
  color: #fff;
}

.quality-grid {
  display: grid;
  grid-template-columns: .9fr 1.3fr;
  gap: 36px;
  align-items: center;
}

.quality-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.quality-cards div {
  min-height: 210px;
  padding: 24px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.18);
}

.quality-cards h3,
.quality-cards p {
  color: #fff;
}

.news {
  background: #f4f8fb;
}

.news-grid {
  display: grid;
  grid-template-columns: 430px 1fr;
  gap: 40px;
  align-items: center;
}

.news img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border: 10px solid #fff;
  box-shadow: 0 8px 24px rgba(20, 48, 70, .1);
}

.text-link {
  margin-top: 10px;
}

.footer {
  background: #183348;
  color: #d7e3ec;
  padding: 54px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr .85fr .75fr 1.25fr;
  gap: 34px;
}

.footer img {
  width: 135px;
  margin-bottom: 18px;
}

.footer h3 {
  color: #fff;
  font-size: 17px;
}

.footer a {
  display: block;
  color: #d7e3ec;
  margin: 10px 0;
}

.footer p {
  color: #d7e3ec;
}

.page-hero {
  padding: 68px 0;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(9, 34, 54, .86), rgba(9, 34, 54, .38)),
    url("assets/banner2.jpg") center / cover no-repeat;
}

.page-hero p {
  margin: 0 0 10px;
  color: #bfe4f5;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 2px;
}

.page-hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: 40px;
  line-height: 1.16;
}

.breadcrumb {
  padding: 16px 0;
  border-bottom: 1px solid #e5ecf1;
  color: #667583;
  font-size: 14px;
}

.breadcrumb a {
  color: #1b77ac;
  font-weight: 800;
}

.page-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 36px;
  align-items: start;
}

.side-nav {
  border: 1px solid #dce5ec;
  background: #f7fafc;
}

.side-nav h2 {
  margin: 0;
  padding: 16px 18px;
  background: #2f536f;
  color: #fff;
  font-size: 18px;
}

.side-nav a {
  display: block;
  padding: 14px 18px;
  border-top: 1px solid #dce5ec;
  color: #22384a;
  font-weight: 800;
}

.side-nav a:hover {
  color: #1b77ac;
  background: #fff;
}

.content-panel {
  min-width: 0;
}

.content-panel > h2 {
  margin: 0 0 18px;
  color: #183348;
  font-size: 30px;
}

.lead {
  max-width: 860px;
  color: #5a6874;
  font-size: 17px;
  line-height: 1.75;
}

.detail-grid,
.product-list,
.contact-grid {
  display: grid;
  gap: 22px;
}

.detail-grid,
.product-list,
.contact-grid {
  grid-template-columns: repeat(2, 1fr);
}

.detail-card,
.product-item,
.contact-card {
  border: 1px solid #dce5ec;
  background: #fff;
}

.detail-card img,
.product-item img {
  width: 100%;
  aspect-ratio: 600 / 436;
  object-fit: cover;
  background: #f4f8fb;
}

.detail-card div,
.product-item div,
.contact-card {
  padding: 22px;
}

.detail-card h3,
.product-item h3,
.contact-card h3 {
  margin: 0 0 10px;
  color: #153147;
}

.detail-card p,
.product-item p,
.contact-card p {
  margin: 0 0 12px;
  color: #5a6874;
  line-height: 1.7;
}

.source-note {
  margin-top: 28px;
  padding: 16px 18px;
  background: #f4f8fb;
  color: #5a6874;
  border-left: 4px solid #1b77ac;
  line-height: 1.65;
}

@media (max-width: 980px) {
  .nav-wrap {
    height: auto;
    grid-template-columns: 1fr;
    padding: 16px 0;
  }

  .main-nav {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .main-nav a {
    padding: 8px 10px;
  }

  .brand img {
    width: 128px;
    max-height: 54px;
  }

  .nav-cta {
    width: fit-content;
  }

  .hero h1 {
    font-size: 34px;
  }

  .about-grid,
  .application-grid,
  .quality-grid,
  .quality-cards,
  .news-grid,
  .footer-grid,
  .page-layout,
  .detail-grid,
  .product-list,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .page-hero h1 {
    font-size: 32px;
  }

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

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

@media (max-width: 560px) {
  .topbar-inner {
    min-height: 36px;
    height: auto;
    padding: 0;
    justify-content: center;
    align-items: center;
  }

  .topbar-inner span:first-child {
    display: none;
  }

  .topbar {
    font-size: 12px;
  }

  .phone {
    text-align: center;
    line-height: 1.35;
  }

  .nav-wrap {
    gap: 12px;
    padding: 12px 0;
  }

  .brand {
    display: flex;
    justify-content: center;
  }

  .brand img {
    width: 118px;
    max-height: 50px;
    object-position: center;
  }

  .main-nav {
    justify-content: center;
    gap: 4px;
  }

  .main-nav a {
    padding: 7px 8px;
    font-size: 13px;
  }

  .nav-cta {
    margin: 0 auto;
    min-height: 34px;
    padding: 0 14px;
    font-size: 13px;
  }

  .hero,
  .hero-track,
  .hero-track img {
    height: 560px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .product-grid,
  .stats {
    grid-template-columns: 1fr;
  }

  section {
    padding: 54px 0;
  }
}