:root {
  --background: #f6f7f7;
  --foreground: #162025;
  --muted: #627078;
  --line: #dce2e5;
  --panel: #ffffff;
  --ink: #10171b;
  --steel: #34444d;
  --blue: #1f5d7a;
  --flame: #e36f24;
  --flame-dark: #aa4719;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--background);
  color: var(--foreground);
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Hiragino Sans GB",
    Arial,
    sans-serif;
  margin: 0;
}

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

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

main {
  min-height: 100vh;
  overflow: hidden;
}

.siteHeader {
  align-items: center;
  background: rgba(12, 18, 21, 0.86);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  left: 0;
  min-height: 72px;
  padding: 0 56px;
  position: fixed;
  right: 0;
  top: 0;
  z-index: 20;
}

.brandMark {
  align-items: center;
  display: inline-flex;
  font-size: 1rem;
  font-weight: 700;
  gap: 12px;
}

.brandSymbol {
  background:
    linear-gradient(135deg, var(--flame), #f2b13b),
    var(--flame);
  border: 2px solid rgba(255, 255, 255, 0.34);
  border-radius: 50%;
  box-shadow:
    0 10px 26px rgba(0, 0, 0, 0.24),
    inset 0 0 0 3px rgba(255, 255, 255, 0.14);
  display: inline-block;
  height: 34px;
  position: relative;
  width: 34px;
}

.brandSymbol::after {
  background: rgba(16, 23, 27, 0.82);
  content: "";
  height: 13px;
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 13px;
}

.navLinks {
  align-items: center;
  display: flex;
  gap: 28px;
  font-size: 0.95rem;
}

.navLinks a {
  color: rgba(255, 255, 255, 0.82);
}

.navLinks a:hover {
  color: #ffffff;
}

.hero {
  background: #11191d;
  color: #ffffff;
  min-height: 760px;
  position: relative;
}

.heroImage {
  height: 100%;
  inset: 0;
  object-fit: cover;
  position: absolute;
  width: 100%;
}

.heroShade {
  background:
    linear-gradient(90deg, rgba(7, 11, 13, 0.9) 0%, rgba(7, 11, 13, 0.72) 36%, rgba(7, 11, 13, 0.26) 72%, rgba(7, 11, 13, 0.14) 100%),
    linear-gradient(180deg, rgba(7, 11, 13, 0.34) 0%, rgba(7, 11, 13, 0.22) 52%, rgba(7, 11, 13, 0.72) 100%);
  inset: 0;
  position: absolute;
}

.heroContent {
  margin: 0 auto;
  max-width: 1180px;
  padding: 170px 40px 82px;
  position: relative;
  z-index: 2;
}

.eyebrow {
  color: #f2b13b;
  font-size: 0.9rem;
  font-weight: 700;
  margin: 0 0 18px;
}

.eyebrow.dark {
  color: var(--flame-dark);
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.08;
  margin: 0;
  max-width: 720px;
}

.heroLead {
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.12rem;
  line-height: 1.9;
  margin: 28px 0 0;
  max-width: 660px;
}

.heroActions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.primaryButton,
.secondaryButton {
  align-items: center;
  border-radius: 6px;
  display: inline-flex;
  font-size: 1rem;
  font-weight: 700;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
}

.primaryButton {
  background: var(--flame);
  color: #ffffff;
}

.primaryButton:hover {
  background: #cf5d1b;
}

.secondaryButton {
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #ffffff;
}

.secondaryButton:hover {
  border-color: rgba(255, 255, 255, 0.72);
}

.heroMetrics {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 150px));
  margin: 74px 0 0;
}

.heroMetrics div {
  border-left: 2px solid var(--flame);
  padding-left: 16px;
}

.heroMetrics dt {
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1;
}

.heroMetrics dd {
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.92rem;
  margin: 8px 0 0;
}

.sectionInner {
  margin: 0 auto;
  max-width: 1180px;
  padding-left: 40px;
  padding-right: 40px;
}

.brandBand {
  background: #ffffff;
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
}

.brandInner {
  align-items: center;
  display: flex;
  gap: 36px;
  min-height: 118px;
}

.brandInner p {
  color: var(--muted);
  flex: 0 0 auto;
  font-weight: 700;
  margin: 0;
}

.brandList {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: 100%;
}

.brandList span,
.accessoryGrid span,
.applicationList span {
  align-items: center;
  background: #f4f6f7;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: flex;
  font-weight: 700;
  min-height: 46px;
  padding: 0 16px;
}

.brandList span {
  color: var(--steel);
  justify-content: center;
}

.sceneSection {
  background: #f0f3f4;
  padding: 92px 0 86px;
}

.sceneGrid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 42px;
}

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

.sceneCard img {
  aspect-ratio: 4 / 3;
  height: auto;
  object-fit: cover;
  width: 100%;
}

.sceneCard div {
  padding: 24px 26px 26px;
}

.sceneCard p {
  color: var(--muted);
  line-height: 1.8;
  margin: 0;
}

.sectionIntro {
  background: var(--background);
  padding: 90px 0 38px;
}

.introGrid {
  align-items: end;
  display: grid;
  gap: 72px;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.72fr);
}

h2 {
  color: var(--ink);
  font-size: 2.45rem;
  line-height: 1.22;
  margin: 0;
}

.introGrid > p,
.splitText p,
.contactBoard p,
.trustPoints p,
.productCard p,
.stepCard p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
  margin: 0;
}

.productSection {
  background: var(--background);
  padding: 34px 0 92px;
}

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

.productCard,
.stepCard,
.trustPoints article {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.productCard {
  min-height: 250px;
  padding: 26px;
}

.cardRule {
  background: var(--flame);
  display: block;
  height: 4px;
  margin-bottom: 28px;
  width: 46px;
}

h3 {
  color: var(--ink);
  font-size: 1.22rem;
  line-height: 1.35;
  margin: 0 0 14px;
}

.accessorySection {
  background: #ffffff;
  padding: 92px 0;
}

.splitLayout {
  align-items: start;
  display: grid;
  gap: 74px;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
}

.splitText p {
  margin-top: 22px;
}

.accessoryGrid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.accessoryGrid span {
  color: var(--steel);
  justify-content: flex-start;
}

.serviceSection {
  background: var(--background);
  padding: 92px 0;
}

.sectionTitle {
  max-width: 760px;
}

.stepGrid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 42px;
}

.stepCard {
  min-height: 236px;
  padding: 26px;
}

.stepCard span {
  color: var(--blue);
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 28px;
}

.applicationsSection {
  background: #122027;
  color: #ffffff;
  padding: 92px 0;
}

.applicationLayout {
  align-items: center;
  display: grid;
  gap: 72px;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
}

.applicationsSection h2 {
  color: #ffffff;
}

.applicationList {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.applicationList span {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.9);
}

.trustSection {
  background: #ffffff;
  padding: 92px 0;
}

.trustGrid {
  display: grid;
  gap: 70px;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
}

.trustPoints {
  display: grid;
  gap: 16px;
}

.trustPoints article {
  padding: 24px 26px;
}

.contactSection {
  background:
    linear-gradient(90deg, rgba(16, 23, 27, 0.94), rgba(31, 93, 122, 0.88)),
    #162025;
  color: #ffffff;
  padding: 86px 0;
}

.contactBoard {
  align-items: center;
  display: grid;
  gap: 64px;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.78fr);
}

.contactBoard h2 {
  color: #ffffff;
}

.contactBoard p {
  color: rgba(255, 255, 255, 0.78);
  margin-top: 22px;
}

.contactDetails {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  display: grid;
  font-style: normal;
  gap: 16px;
  padding: 28px;
}

.contactDetails span {
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.9);
  padding-bottom: 16px;
}

.contactDetails span:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.siteFooter {
  background: #0c1215;
  color: rgba(255, 255, 255, 0.72);
  padding: 28px 0;
}

.footerInner {
  display: flex;
  gap: 20px;
  justify-content: space-between;
}

@media (max-width: 980px) {
  .siteHeader {
    padding: 0 28px;
  }

  .hero {
    min-height: 720px;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .introGrid,
  .splitLayout,
  .applicationLayout,
  .trustGrid,
  .contactBoard {
    gap: 36px;
    grid-template-columns: 1fr;
  }

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

  .brandInner {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
    padding-bottom: 28px;
    padding-top: 28px;
  }

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

@media (max-width: 680px) {
  .siteHeader {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    min-height: 104px;
    padding: 16px 20px;
    position: absolute;
  }

  .brandMark {
    font-size: 0.95rem;
  }

  .navLinks {
    gap: 18px;
    overflow-x: auto;
    width: 100%;
  }

  .hero {
    min-height: 760px;
  }

  .heroContent {
    padding: 154px 22px 58px;
  }

  .hero h1 {
    font-size: 2.45rem;
  }

  .heroLead {
    font-size: 1rem;
  }

  .heroMetrics {
    grid-template-columns: 1fr;
    margin-top: 46px;
  }

  .sectionInner {
    padding-left: 22px;
    padding-right: 22px;
  }

  h2 {
    font-size: 2rem;
  }

  .sectionIntro,
  .sceneSection,
  .accessorySection,
  .serviceSection,
  .applicationsSection,
  .trustSection,
  .contactSection {
    padding-bottom: 66px;
    padding-top: 66px;
  }

  .productSection {
    padding-bottom: 66px;
  }

  .productGrid,
  .stepGrid,
  .sceneGrid,
  .accessoryGrid,
  .brandList,
  .applicationList {
    grid-template-columns: 1fr;
  }

  .productCard,
  .stepCard {
    min-height: auto;
  }

  .footerInner {
    flex-direction: column;
  }
}