:root {
  --ink: #101820;
  --ink-soft: #3d505b;
  --paper: #f7faf8;
  --card: #ffffff;
  --line: #dbe5e1;
  --blue: #123bbb;
  --blue-dark: #0b2b91;
  --gold: #e8aa3d;
  --green: #789f63;
  --shadow: 0 24px 64px rgba(16, 24, 32, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 5vw, 72px);
  background: rgba(247, 250, 248, 0.94);
  border-bottom: 1px solid rgba(16, 24, 32, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-logo {
  display: grid;
  place-items: center;
  width: 58px;
  height: 46px;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(18, 59, 187, 0.16);
  border-radius: 8px;
  box-shadow: 0 12px 28px rgba(18, 59, 187, 0.14);
}

.brand-logo img {
  width: 50px;
}

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

.brand-text strong {
  font-size: 18px;
  line-height: 1.2;
}

.brand-text small {
  margin-top: 4px;
  color: #60717a;
  font-size: 12px;
}

nav {
  display: flex;
  gap: clamp(12px, 3vw, 30px);
  color: #1d2f3b;
  font-size: 14px;
  font-weight: 700;
}

nav a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

nav a:hover {
  color: var(--blue-dark);
  border-color: var(--gold);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(340px, 0.98fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 79px);
  padding: clamp(42px, 7vw, 92px) clamp(18px, 5vw, 72px) clamp(34px, 6vw, 76px);
  background:
    linear-gradient(90deg, rgba(247, 250, 248, 0.97), rgba(247, 250, 248, 0.76)),
    radial-gradient(circle at 86% 12%, rgba(232, 170, 61, 0.26), transparent 32%),
    linear-gradient(145deg, #eef3ff, #f9f3e4 62%, #e7f3f1);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.06;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4.4vw, 50px);
  line-height: 1.14;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  letter-spacing: 0;
}

.hero-copy p:not(.eyebrow),
.section-heading p,
.about p,
.contact-band p {
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.85;
}

.hero-copy p:not(.eyebrow) {
  max-width: 720px;
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 14px 32px rgba(18, 59, 187, 0.22);
}

.button.secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
}

.hero-media {
  position: relative;
  min-height: 440px;
  overflow: hidden;
  background: #dfece7;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 100%;
  height: 100%;
  min-height: 440px;
  object-fit: cover;
}

.hero-card {
  position: absolute;
  right: 18px;
  bottom: 18px;
  width: min(280px, calc(100% - 36px));
  padding: 18px;
  color: #fff;
  background: rgba(16, 24, 32, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
}

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

.hero-card span {
  color: #aadfdd;
  font-size: 12px;
  font-weight: 800;
}

.hero-card strong {
  margin-top: 6px;
  font-size: 24px;
  line-height: 1.24;
}

.figures {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(16, 24, 32, 0.08);
}

.figures div {
  padding: 26px clamp(18px, 4vw, 44px);
  background: #fff;
}

.figures strong {
  display: block;
  color: var(--blue-dark);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1;
}

.figures span {
  display: block;
  margin-top: 10px;
  color: #53656d;
  font-weight: 700;
}

.section {
  padding: clamp(58px, 8vw, 110px) clamp(18px, 5vw, 72px);
}

.section-heading {
  max-width: 920px;
  margin-bottom: 36px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.product-card {
  min-height: 100%;
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 34px rgba(16, 24, 32, 0.08);
}

.product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #eef3f2;
}

.product-card span,
.product-card h3,
.product-card p {
  margin-right: 20px;
  margin-left: 20px;
}

.product-card span {
  display: inline-flex;
  margin-top: 20px;
  margin-bottom: 12px;
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 800;
}

.product-card p {
  margin-bottom: 22px;
  color: #52646c;
  line-height: 1.78;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: start;
  background:
    linear-gradient(135deg, rgba(18, 59, 187, 0.06), rgba(232, 170, 61, 0.1)),
    #eef5f2;
}

.capability-list {
  display: grid;
  gap: 12px;
}

.capability-list div {
  padding: 18px 20px;
  color: #273943;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(16, 24, 32, 0.08);
  border-radius: 8px;
  box-shadow: 0 10px 26px rgba(16, 24, 32, 0.06);
}

.history {
  background: #fff;
}

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

.history-grid article {
  padding: 24px;
  background: #f7faf8;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.history-grid strong {
  color: var(--green);
  font-size: 14px;
}

.history-grid h3 {
  margin-top: 14px;
}

.history-grid p {
  margin-bottom: 0;
  color: #53656d;
  line-height: 1.75;
}

.about {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(24px, 5vw, 64px);
  border-top: 1px solid var(--line);
}

.about p {
  margin-bottom: 0;
}

.contact-band {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.8fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: center;
  margin: 0 clamp(18px, 5vw, 72px) clamp(58px, 8vw, 110px);
  padding: clamp(30px, 5vw, 58px);
  color: #fff;
  background:
    linear-gradient(135deg, rgba(18, 59, 187, 0.94), rgba(11, 43, 145, 0.9)),
    var(--blue);
  border-radius: 8px;
}

.contact-band .eyebrow,
.contact-band p {
  color: rgba(255, 255, 255, 0.84);
}

.contact-panel {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
}

.contact-panel p {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 16px;
  margin: 0;
  padding: 18px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.contact-panel p:last-child {
  border-bottom: 0;
}

.contact-panel span {
  color: rgba(255, 255, 255, 0.72);
}

.contact-panel strong {
  color: #fff;
  font-size: 18px;
}

footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 24px clamp(18px, 5vw, 72px);
  color: #60717a;
  background: #fff;
  border-top: 1px solid var(--line);
}

.footer-meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.footer-meta a {
  color: #526670;
  text-decoration: none;
}

.footer-meta a:hover,
.footer-meta a:focus-visible {
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 980px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    flex-wrap: wrap;
  }

  .hero,
  .split,
  .about,
  .contact-band {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 640px) {
  .brand-text small {
    display: none;
  }

  .hero {
    min-height: auto;
  }

  .hero-media,
  .hero-media img {
    min-height: 300px;
  }

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

  .contact-panel p {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-meta {
    justify-content: flex-start;
  }
}