:root {
  --blue: #002fa7;
  --blue-dark: #001b61;
  --ink: #101624;
  --muted: #667085;
  --line: #d9dfec;
  --paper: #f7f9fc;
  --white: #ffffff;
  --shadow: 0 24px 80px rgba(16, 22, 36, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
  padding: 14px clamp(20px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 310px;
}

.brand img {
  width: 68px;
  height: 68px;
  border-radius: 12px;
}

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

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.25;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  font-size: 15px;
  color: #263044;
}

.nav-links a {
  padding: 10px 0;
}

.nav-links a:hover {
  color: var(--blue);
}

.lang-toggle {
  min-width: 58px;
  height: 38px;
  border: 1px solid var(--blue);
  border-radius: 4px;
  color: var(--blue);
  background: var(--white);
  font-weight: 700;
  cursor: pointer;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 78px);
  padding: clamp(54px, 7vw, 96px) clamp(20px, 6vw, 80px) 54px;
  background:
    linear-gradient(110deg, rgba(0, 47, 167, 0.08), transparent 44%),
    linear-gradient(180deg, #ffffff 0%, #f5f8ff 100%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
}

.hero-lede,
.section-body p,
.section-heading p,
.quality-panel p,
.contact p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 20px;
  border-radius: 4px;
  border: 1px solid var(--blue);
  font-weight: 800;
}

.button.primary {
  color: var(--white);
  background: var(--blue);
}

.button.ghost {
  color: var(--blue);
  background: transparent;
}

.hero-media {
  position: relative;
}

.hero-media img {
  width: 100%;
  height: min(62vh, 560px);
  object-fit: cover;
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.hero-stat {
  position: absolute;
  right: -18px;
  bottom: 28px;
  width: 168px;
  padding: 20px;
  color: var(--white);
  background: var(--blue);
  box-shadow: var(--shadow);
}

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

.hero-stat strong {
  font-size: 42px;
  line-height: 1;
}

.hero-stat span {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.35;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metrics div {
  min-height: 146px;
  padding: 32px clamp(20px, 4vw, 56px);
  border-right: 1px solid var(--line);
}

.metrics div:last-child {
  border-right: 0;
}

.metrics strong,
.metrics span {
  display: block;
}

.metrics strong {
  color: var(--blue);
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1;
}

.metrics span {
  margin-top: 12px;
  color: var(--muted);
  font-weight: 700;
}

.section {
  padding: clamp(70px, 8vw, 112px) clamp(20px, 6vw, 80px);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: clamp(28px, 6vw, 86px);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 34px;
}

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

.product-card,
.case-grid article,
.quality-panel,
.contact-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.product-card img {
  width: 100%;
  height: 270px;
  object-fit: cover;
}

.product-card div {
  padding: 24px;
}

.product-card p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.band {
  background: var(--paper);
}

.capability-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(360px, 0.8fr);
  gap: 28px;
  align-items: stretch;
}

.capability-layout > img {
  width: 100%;
  height: 100%;
  min-height: 520px;
  object-fit: cover;
  border-radius: 6px;
}

.capability-list {
  display: grid;
  gap: 16px;
}

.capability-list div {
  padding: 28px;
  background: var(--white);
  border-left: 5px solid var(--blue);
}

.capability-list span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.capability-list p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.case-grid {
  grid-template-columns: repeat(4, 1fr);
}

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

.case-grid h3 {
  margin: 0;
  padding: 18px;
  font-size: 18px;
}

.quality {
  color: var(--white);
  background: var(--blue-dark);
}

.quality .section-kicker,
.quality h2 {
  color: var(--white);
}

.quality-panel {
  padding: 30px;
  color: var(--ink);
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.72fr);
  gap: 40px;
  align-items: start;
}

.contact-card {
  padding: 28px;
  box-shadow: var(--shadow);
}

.contact-card p {
  margin-bottom: 14px;
}

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

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(20px, 6vw, 80px);
  color: var(--white);
  background: var(--ink);
}

.site-footer strong,
.site-footer span {
  display: block;
}

.site-footer span {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.72);
}

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

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    gap: 18px;
    overflow-x: auto;
  }

  .hero,
  .split,
  .capability-layout,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

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

  .hero-stat {
    right: 14px;
  }
}

@media (max-width: 640px) {
  .brand {
    min-width: 0;
  }

  .brand img {
    width: 54px;
    height: 54px;
  }

  .brand small {
    display: none;
  }

  .hero,
  .section {
    padding-left: 18px;
    padding-right: 18px;
  }

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

  .metrics div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .hero-media img,
  .capability-layout > img {
    height: 360px;
    min-height: 0;
  }

  .hero-stat {
    position: static;
    width: 100%;
    margin-top: 12px;
  }

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