:root {
  color-scheme: light;
  --ink: #16202a;
  --muted: #66717d;
  --line: #dce3ea;
  --paper: #f6f8fb;
  --panel: #ffffff;
  --brand: #b0192b;
  --brand-deep: #7c1020;
  --steel: #354657;
  --accent: #d7b46a;
  --shadow: 0 18px 50px rgba(22, 32, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  background: var(--paper);
}

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;
  min-height: 72px;
  padding: 12px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  background: rgba(22, 32, 42, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
  font-weight: 700;
}

.brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  border-radius: 6px;
  background: #fff;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 2vw, 32px);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.84);
}

.main-nav a:hover,
.footer-links a:hover {
  color: #fff;
}

.header-phone {
  min-width: max-content;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 6px;
  font-weight: 700;
}

.hero {
  position: relative;
  display: grid;
  min-height: calc(100vh - 72px);
  overflow: hidden;
  background: var(--ink);
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(10, 17, 24, 0.9), rgba(10, 17, 24, 0.64) 42%, rgba(10, 17, 24, 0.2)),
    linear-gradient(0deg, rgba(10, 17, 24, 0.42), transparent 40%);
}

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

.hero-content {
  position: relative;
  z-index: 1;
  align-self: center;
  width: min(720px, calc(100% - 40px));
  margin-left: clamp(20px, 7vw, 96px);
  padding: 52px 0;
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 680px;
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.16;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.3;
}

.hero-subtitle {
  max-width: 640px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 32px 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
}

.btn.primary {
  color: #fff;
  background: var(--brand);
}

.btn.primary:hover {
  background: var(--brand-deep);
}

.btn.secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.42);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 560px;
  margin: 0;
}

.hero-stats div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.09);
}

.hero-stats dt {
  font-size: 24px;
  font-weight: 800;
}

.hero-stats dd {
  margin: 4px 0 0;
  color: rgba(255, 255, 255, 0.72);
}

.geo-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 18px 24px;
  color: #fff;
  background: var(--brand);
}

.geo-label {
  padding: 4px 8px;
  border-radius: 4px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  background: #fff;
}

.geo-bar select {
  min-height: 36px;
  padding: 0 12px;
  border: 0;
  border-radius: 6px;
  color: var(--ink);
  background: #fff;
}

.section {
  padding: clamp(58px, 8vw, 110px) clamp(20px, 5vw, 72px);
}

.section-head {
  max-width: 820px;
  margin: 0 auto 36px;
  text-align: center;
}

.section-head p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
}

.intro {
  background: #fff;
}

.intro-grid,
.manufacturing {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.82fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
}

.intro-copy {
  color: var(--muted);
  font-size: 18px;
}

.intro-grid img,
.manufacturing img {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  max-width: 1180px;
  margin: 0 auto;
}

.product-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #e9edf1;
}

.product-card h3,
.product-card p {
  padding-inline: 20px;
}

.product-card h3 {
  margin-top: 18px;
}

.product-card p {
  min-height: 84px;
  color: var(--muted);
}

.capabilities {
  color: #fff;
  background: var(--steel);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.feature-grid article {
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.feature-grid span {
  display: block;
  margin-bottom: 30px;
  color: var(--accent);
  font-weight: 800;
}

.feature-grid p {
  color: rgba(255, 255, 255, 0.74);
}

.manufacturing {
  background: #fff;
}

.manufacturing-copy {
  max-width: 620px;
}

.manufacturing-copy p {
  color: var(--muted);
  font-size: 17px;
}

.check-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
}

.check-list li {
  padding: 12px 14px;
  border-left: 4px solid var(--brand);
  border-radius: 6px;
  background: var(--paper);
}

.cooperation {
  background: #fff;
}

.process {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  max-width: 1180px;
  padding: 0;
  margin: 0 auto;
  list-style: none;
}

.process li {
  min-height: 160px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.process strong {
  display: block;
  margin-bottom: 12px;
  color: var(--brand);
  font-size: 19px;
}

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

.contact {
  background: var(--ink);
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: clamp(28px, 5vw, 70px);
  max-width: 1180px;
  margin: 0 auto;
  color: #fff;
}

.contact-panel p {
  color: rgba(255, 255, 255, 0.76);
}

.contact-list {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
}

.contact-list div {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
}

.contact-list dt {
  color: rgba(255, 255, 255, 0.56);
}

.contact-list dd {
  margin: 0;
}

.inquiry-form {
  display: grid;
  gap: 14px;
  padding: 24px;
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.inquiry-form label {
  display: grid;
  gap: 6px;
  color: var(--ink);
  font-weight: 700;
}

.inquiry-form input,
.inquiry-form textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  font: inherit;
  resize: vertical;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 26px clamp(20px, 5vw, 72px);
  color: rgba(255, 255, 255, 0.72);
  background: #101820;
}

.site-footer strong {
  color: #fff;
}

.site-footer p {
  margin: 4px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
}

@media (max-width: 980px) {
  .main-nav {
    display: none;
  }

  .hero-content {
    width: min(680px, calc(100% - 40px));
  }

  .intro-grid,
  .manufacturing,
  .contact-panel {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 640px) {
  .site-header {
    gap: 12px;
    min-height: 64px;
  }

  .brand span {
    display: none;
  }

  .header-phone {
    font-size: 13px;
  }

  .hero {
    min-height: 760px;
  }

  .hero-media::after {
    background: linear-gradient(0deg, rgba(10, 17, 24, 0.9), rgba(10, 17, 24, 0.54));
  }

  .hero-content {
    align-self: end;
    margin: 0 auto;
    padding-bottom: 36px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

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

  .geo-bar {
    align-items: stretch;
    flex-direction: column;
  }

  .contact-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

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

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