:root {
  --blue: #0758b5;
  --blue-deep: #024892;
  --text: #202e3d;
  --line: #e3e8ef;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Source Sans 3", "Noto Sans SC", sans-serif;
  color: var(--text);
  background: #fff;
}

.container {
  width: min(1240px, 94vw);
  margin: 0 auto;
}

.top-head {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.top-head-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  color: inherit;
  min-width: 260px;
}
.logo {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.logo img {
  width: 46px;
  height: 46px;
  display: block;
}
.brand-text strong {
  display: block;
  font-size: 1.62rem;
  line-height: 1.05;
  font-weight: 900;
}
.brand-text small {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  color: #2f4762;
  line-height: 1.15;
}

.top-slogan {
  border-left: 1px solid #d9e1eb;
  padding-left: 1rem;
  min-width: 430px;
}
.top-slogan strong {
  display: block;
  font-size: 1.03rem;
  line-height: 1.25;
  color: #1d2f43;
}
.top-slogan small {
  display: block;
  margin-top: 0.05rem;
  font-size: 0.62rem;
  color: #263c55;
  line-height: 1.2;
}
.contact {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.contact-item {
  display: grid;
  grid-template-columns: 26px 1fr;
  column-gap: 0.35rem;
  align-items: center;
}
.contact-icon {
  width: 24px;
  height: 24px;
  border: 1px solid #79a7e0;
  color: #0f5aae;
  border-radius: 50%;
  font-style: normal;
  font-size: 0.8rem;
  display: grid;
  place-items: center;
  grid-row: 1 / span 2;
}
.contact-item b {
  font-size: 0.78rem;
  color: #1f3348;
  line-height: 1;
}
.contact-item em {
  font-style: normal;
  color: #2e455d;
  font-size: 0.66rem;
  line-height: 1.15;
}
.lang-entry {
  border: 1px solid #d0ddec;
  background: #fff;
  border-radius: 999px;
  padding: 0.18rem 0.55rem;
  color: #31495f;
  font-size: 0.78rem;
  cursor: pointer;
  white-space: nowrap;
}

.main-nav {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.nav-inner {
  display: flex;
  align-items: center;
  min-height: 56px;
}
.nav-inner a {
  text-decoration: none;
  color: #263442;
  font-size: 0.98rem;
  font-weight: 600;
  padding: 0.95rem 1.25rem;
}
.nav-inner a.active {
  background: var(--blue);
  color: #fff;
}

.hero {
  position: relative;
  height: 600px;
  overflow: hidden;
  background-color: #8f99a6;
  background-image: url("./assets/hero/hero-container-ocean.jpg"), url("./info.png");
  background-size: cover;
  background-position: center bottom;
}
.mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 23, 52, 0.25), rgba(0, 23, 52, 0.55));
}
.hero-text {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  color: #fff;
}
.hero-text p {
  margin: 0;
  font-size: 2.2rem;
  font-weight: 700;
}
.hero-text h1 {
  margin: 0.3rem 0;
  font-size: clamp(2.2rem, 4.9vw, 4.8rem);
  line-height: 1.05;
  font-weight: 800;
  text-transform: uppercase;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}
.hero-text h2 {
  margin: 0;
  font-size: 2rem;
  font-weight: 600;
}
.btn {
  margin: 1.5rem auto 0;
  text-decoration: none;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  padding: 0.8rem 2rem;
  border-radius: 2px;
}

.products {
  margin-top: -96px;
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  background: #fff;
  border: 1px solid #dce3ec;
  border-radius: 8px;
  overflow: hidden;
}
.products article {
  text-align: center;
  border-right: 1px solid #e6ebf2;
  padding: 1rem 0.6rem 0.9rem;
}
.products article:last-child { border-right: none; }
.products img {
  width: 120px;
  height: 120px;
  object-fit: contain;
}
.products h3 {
  margin: 0.5rem 0 0.05rem;
  font-size: 1.35rem;
  color: #0f5eb5;
}
.products p {
  margin: 0;
  font-size: 1.35rem;
  color: #224766;
  font-weight: 600;
}

.stats {
  background: linear-gradient(135deg, var(--blue-deep), var(--blue));
}
.stats-inner {
  min-height: 160px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stats-inner > div {
  color: #fff;
  text-align: center;
  display: grid;
  place-content: center;
  border-right: 1px solid rgba(255, 255, 255, 0.22);
}
.stats-inner > div:last-child { border-right: none; }
.stats strong {
  display: block;
  font-size: 3rem;
  line-height: 1;
}
.stats span { font-size: 1.2rem; }

.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: 2rem 0 1rem;
}
.kicker {
  margin: 0;
  color: #0f5aae;
  font-weight: 800;
}
.about h2 {
  margin: 0.2rem 0 0.8rem;
  font-size: 3rem;
  color: #0f5aae;
}
.about p {
  font-size: 1.45rem;
  line-height: 1.45;
  color: #2c3e52;
}
.btn.small {
  display: inline-block;
  padding: 0.58rem 1rem;
  margin-top: 0.35rem;
}
.right img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.douyin-card {
  margin-top: 0.2rem;
  border: 1px solid #dbe7f5;
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(135deg, #f7fbff, #eef5ff);
  display: block;
}

.douyin-media img {
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center top;
  display: block;
}

.section {
  padding: 1.4rem 0 0.8rem;
}

.section-head h2 {
  margin: 0;
  color: #0f5aae;
  font-size: 2rem;
}

.section-head p {
  margin: 0.35rem 0 0;
  color: #3e5166;
  font-size: 1.02rem;
}

.focus-grid {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.85rem;
}

.focus-grid article {
  border: 1px solid #e1e8f2;
  border-radius: 10px;
  padding: 0.95rem;
  background: #fbfdff;
}

.focus-grid h3 {
  margin: 0;
  color: #0f5aae;
  font-size: 1.12rem;
}

.focus-grid p {
  margin: 0.5rem 0 0;
  color: #3d4e61;
  line-height: 1.4;
}

.table-wrap {
  margin-top: 0.9rem;
  border: 1px solid #dfe7f1;
  border-radius: 10px;
  overflow: auto;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 930px;
  background: #fff;
}

.spec-table thead {
  background: linear-gradient(135deg, #0b57af, #0a68cf);
  color: #fff;
}

.spec-table th,
.spec-table td {
  padding: 0.72rem 0.68rem;
  border-bottom: 1px solid #e6ecf4;
  text-align: left;
  font-size: 0.95rem;
}

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

.cert-grid,
.workflow-grid {
  margin-top: 0.9rem;
}

.cert-section .cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

.cert-section .cert-grid article {
  border: 1px solid #d9e6f6;
  border-radius: 10px;
  padding: 0.95rem;
  background: linear-gradient(180deg, #f7fbff, #eef5ff);
}

.cert-section .cert-grid h3 {
  margin: 0;
  color: #0f5aae;
  font-size: 1.08rem;
}

.cert-section .cert-grid p {
  margin: 0.5rem 0 0;
  color: #3c4f66;
  line-height: 1.4;
}

.map-nav-card {
  margin-top: 0.9rem;
  border: 1px solid #d9e6f6;
  border-radius: 10px;
  padding: 1rem;
  background: linear-gradient(180deg, #f7fbff, #eef5ff);
}

.map-nav-card p {
  margin: 0;
  color: #314a63;
}

.map-btns {
  margin-top: 0.8rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.map-frame {
  margin-top: 0.85rem;
  border: 1px solid #cfe0f3;
  border-radius: 10px;
  overflow: hidden;
  background: #eef5ff;
}

.map-frame iframe {
  width: 100%;
  height: 320px;
  border: 0;
  display: block;
}

.map-btn {
  display: inline-block;
  text-decoration: none;
  background: #0f5aae;
  color: #fff;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.56rem 0.9rem;
  border-radius: 8px;
}

.map-btn:hover {
  background: #0c4f9b;
}

.workflow-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.65rem;
}

.workflow-grid div {
  border: 1px solid #dbe6f4;
  border-radius: 10px;
  padding: 0.85rem 0.5rem;
  text-align: center;
  background: #fff;
}

.workflow-grid b {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  font-size: 0.9rem;
  color: #fff;
  background: #0f5aae;
}

.workflow-grid span {
  display: block;
  margin-top: 0.55rem;
  color: #2f4258;
  font-size: 0.95rem;
  line-height: 1.35;
  font-weight: 600;
}

.faq-list {
  margin-top: 0.9rem;
  display: grid;
  gap: 0.65rem;
}

.faq-list article {
  border: 1px solid #e3eaf3;
  border-radius: 10px;
  padding: 0.85rem 0.92rem;
  background: #fff;
}

.faq-list h3 {
  margin: 0;
  color: #0f5aae;
  font-size: 1.04rem;
}

.faq-list p {
  margin: 0.48rem 0 0;
  color: #3c5066;
  line-height: 1.42;
}

.bottom-gallery .gallery-grid {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

.bottom-gallery article {
  border: 1px solid #e4ebf4;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}

.bottom-gallery img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}

.bottom-gallery p {
  margin: 0;
  padding: 0.7rem 0.8rem;
  font-weight: 700;
  color: #27425f;
}

.spec-download-card {
  margin-top: 0.5rem;
  border: 1px solid #dbe7f5;
  border-radius: 10px;
  background: linear-gradient(135deg, #f5f9ff, #eef5ff);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.spec-download-card h3 {
  margin: 0;
  color: #0f5aae;
  font-size: 1.2rem;
}

.spec-download-card p {
  margin: 0.35rem 0 0;
  color: #3c5066;
}

.site-footer {
  margin-top: 1.2rem;
  background: #0f2138;
  color: #dce8f5;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 1rem;
  padding: 1.2rem 0;
}

.footer-grid h4 {
  margin: 0 0 0.45rem;
  color: #ffffff;
}

.footer-grid p {
  margin: 0.25rem 0;
}

.footer-grid a {
  color: #dce8f5;
  text-decoration: none;
}

.footer-grid a:hover {
  text-decoration: underline;
}

.footer-copy {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
  font-size: 0.9rem;
  padding: 0.75rem 0;
  color: #b9ccdf;
}

@media (max-width: 1100px) {
  .brand-text strong { font-size: 1.4rem; }
  .brand-text small { font-size: 1rem; }
  .hero { height: 500px; }
  .hero-text p { font-size: 1.4rem; }
  .hero-text h2 { font-size: 1.2rem; }
  .products h3, .products p { font-size: 1rem; }
  .about h2 { font-size: 2rem; }
  .about p { font-size: 1rem; }
}

@media (max-width: 860px) {
  .top-slogan,
  .contact { display: none; }
  .nav-inner { overflow-x: auto; white-space: nowrap; }
  .products { grid-template-columns: repeat(2, 1fr); margin-top: 1rem; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .about { grid-template-columns: 1fr; }
  .douyin-media img { height: auto; }
  .focus-grid,
  .cert-section .cert-grid,
  .bottom-gallery .gallery-grid { grid-template-columns: 1fr; }
  .workflow-grid { grid-template-columns: repeat(2, 1fr); }
  .spec-download-card { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; }
  .map-btns { flex-direction: column; }
  .map-frame iframe { height: 260px; }
}