:root {
  --red: #c9141b;
  --red-dark: #a70f16;
  --ink: #161616;
  --muted: #555;
  --light: #f6f6f6;
  --line: #e7e7e7;
  --soft-line: #efefef;
  --gold: #b88734;
  --wrap: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.65;
}

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

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

.wrap {
  width: min(var(--wrap), calc(100% - 64px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 54px;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--soft-line);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 54px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  min-width: 285px;
}

.brand img {
  width: 50px;
  height: 50px;
  object-fit: contain;
}

.brand strong {
  font-size: 20px;
  font-weight: 900;
  line-height: 1;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0;
  height: 100%;
}

.nav a {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 16px;
  color: #202020;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.nav a.active,
.nav a:hover {
  color: var(--red);
}

.nav a.active::after,
.nav a:hover::after {
  position: absolute;
  right: 18px;
  bottom: 0;
  left: 18px;
  height: 3px;
  background: var(--red);
  content: "";
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #fff;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: #222;
}

.hero {
  min-height: 420px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 70% 35%, rgba(223, 230, 237, .75), transparent 38%),
    linear-gradient(90deg, #fff 0%, #fff 43%, #f4f7fa 72%, #fff 100%);
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 47% 53%;
  align-items: center;
  min-height: 420px;
  padding: 22px 0 16px;
}

.hero-copy {
  position: relative;
  z-index: 2;
  padding: 6px 0 0 26px;
}

.hero-logo {
  width: 116px;
  height: 116px;
  margin: 0 0 6px 116px;
  object-fit: contain;
}

.hero h1 {
  margin: 0;
  font-size: 32px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0;
}

.hero-slogan {
  margin: 8px 0 0;
  color: var(--red);
  font-size: 24px;
  font-weight: 900;
  line-height: 1.25;
}

.hero-role {
  margin: 6px 0 0;
  font-size: 19px;
  font-weight: 500;
  letter-spacing: .04em;
}

.hero-desc {
  max-width: 495px;
  margin: 12px 0 0;
  color: #3e3e3e;
  font-size: 13px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  gap: 32px;
  margin-top: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 150px;
  height: 40px;
  border: 1px solid var(--red);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 800;
}

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

.btn.outline {
  color: var(--red);
  background: #fff;
}

.hero-art {
  align-self: stretch;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-top: 12px;
}

.hero-art img {
  width: 100%;
  max-width: 565px;
  filter: drop-shadow(0 16px 24px rgba(23, 44, 65, .10));
}

.section {
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, .46fr) minmax(0, .54fr);
  gap: 28px;
  align-items: center;
}

h2 {
  margin: 0;
  font-size: 27px;
  font-weight: 900;
  line-height: 1.2;
}

h2::after {
  display: block;
  width: 44px;
  height: 3px;
  margin-top: 12px;
  background: var(--red);
  content: "";
}

.center-title {
  text-align: center;
}

.center-title::after {
  margin-right: auto;
  margin-left: auto;
}

.red-rule {
  display: none;
}

.section-copy {
  max-width: 470px;
  margin: 13px 0 0;
  color: #333;
  font-size: 14px;
}

.about-points {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  max-width: 470px;
  margin-top: 24px;
  border-right: 1px solid var(--line);
}

.about-points article {
  min-height: 88px;
  padding: 0 14px;
  border-left: 1px solid var(--line);
  text-align: center;
}

.about-points strong {
  display: block;
  margin-top: 9px;
  font-size: 14px;
  font-weight: 900;
}

.about-points em {
  display: block;
  margin-top: 4px;
  color: #777;
  font-size: 11px;
  font-style: normal;
  line-height: 1.55;
}

.wide-image {
  margin: 0;
}

.wide-image img {
  width: 100%;
  border: 0;
  object-fit: cover;
}

.services {
  padding-top: 25px;
  padding-bottom: 32px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.service-grid article {
  min-height: 166px;
  padding: 9px 9px 15px;
  border: 1px solid var(--line);
  background: #fff;
  text-align: center;
}

.service-grid img {
  width: 100%;
  aspect-ratio: 1.12 / 1;
  object-fit: cover;
}

.service-grid h3 {
  margin: 8px 0 3px;
  font-size: 15px;
  font-weight: 900;
  line-height: 1.2;
}

.service-grid p {
  margin: 0;
  color: #666;
  font-size: 11px;
  line-height: 1.55;
}

.technology {
  padding-top: 27px;
}

.tech-layout {
  grid-template-columns: minmax(0, .47fr) minmax(0, .53fr);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px 17px;
  margin-top: 24px;
}

.tech-grid article {
  display: grid;
  grid-template-columns: 44px 1fr;
  column-gap: 12px;
  align-items: start;
}

.tech-grid strong {
  display: block;
  margin-top: 2px;
  font-size: 14px;
  font-weight: 900;
}

.tech-grid p {
  grid-column: 2;
  margin: 4px 0 0;
  color: #666;
  font-size: 11px;
  line-height: 1.6;
}

.tech-image img {
  min-height: 220px;
  object-fit: cover;
}

.capacity {
  padding-top: 25px;
  padding-bottom: 30px;
}

.capacity-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.capacity-grid article {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #fff;
  text-align: center;
}

.capacity-grid h3 {
  margin: 9px 10px 0;
  font-size: 15px;
  font-weight: 900;
}

.capacity-grid strong {
  display: block;
  margin-top: 2px;
  color: var(--red);
  font-size: 26px;
  font-weight: 900;
  line-height: 1;
}

.capacity-grid p {
  min-height: 34px;
  margin: 5px 12px 12px;
  color: #666;
  font-size: 11px;
  line-height: 1.45;
}

.capacity-grid img {
  width: 100%;
  aspect-ratio: 1.55 / 1;
  object-fit: cover;
}

.credentials {
  padding-top: 24px;
  padding-bottom: 30px;
}

.credential-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 14px;
  margin-top: 18px;
}

.credential-grid article {
  min-height: 84px;
  padding: 13px 8px;
  border: 1px solid var(--line);
  border-radius: 3px;
  text-align: center;
}

.credential-grid strong {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.35;
}

.credential-note {
  margin: 12px 0 0;
  color: #777;
  font-size: 12px;
  text-align: center;
}

.culture {
  padding-top: 28px;
}

.culture-layout {
  grid-template-columns: minmax(0, .53fr) minmax(0, .47fr);
  gap: 26px;
}

.culture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 20px;
}

.culture-grid article {
  min-height: 96px;
}

.culture-grid h3 {
  position: relative;
  margin: 0 0 13px;
  padding-left: 20px;
  font-size: 16px;
  font-weight: 900;
}

.culture-grid h3::before {
  position: absolute;
  top: 12px;
  left: 0;
  width: 12px;
  height: 2px;
  background: var(--red);
  content: "";
}

.culture-grid p {
  margin: 0;
  color: #666;
  font-size: 12px;
  line-height: 1.7;
}

.culture-image img {
  min-height: 160px;
  object-fit: cover;
}

.contact {
  padding-top: 24px;
  padding-bottom: 24px;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, .27fr) minmax(0, .37fr) minmax(0, .36fr);
  gap: 20px;
  align-items: start;
}

.contact-info h2 {
  text-align: left;
}

.contact-info h2::after {
  margin-left: 0;
}

.contact-info ul {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  color: #444;
  font-size: 13px;
}

.contact-info li {
  position: relative;
  padding-left: 24px;
}

.contact-info li::before {
  position: absolute;
  top: .72em;
  left: 0;
  width: 5px;
  height: 5px;
  border: 1px solid #999;
  border-radius: 50%;
  content: "";
}
.contact-info span {
  color: #333;
  font-weight: 800;
}

.map {
  margin: 48px 0 0;
}

.map img {
  width: 100%;
  min-height: 134px;
  object-fit: cover;
}

.contact-form {
  display: grid;
  gap: 9px;
  margin-top: 46px;
}

.contact-form label {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  color: #333;
  font-size: 13px;
  font-weight: 800;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  padding: 8px 10px;
  color: #222;
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
}

.submit {
  justify-self: end;
  width: 202px;
  height: 34px;
  margin-top: 4px;
  border: 0;
  border-radius: 3px;
  color: #fff;
  background: var(--red);
  font-weight: 900;
  cursor: pointer;
}

.footer {
  color: #e8e8e8;
  background: #242424;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
  font-size: 12px;
}

.line-icon,
.big-icon {
  display: inline-grid;
  place-items: center;
  color: var(--red);
  border: 2px solid currentColor;
}

.line-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
}

.line-icon::before,
.big-icon::before {
  display: block;
  color: currentColor;
  font-weight: 900;
  line-height: 1;
}

.line-icon.team::before { content: "人"; }
.line-icon.plan::before { content: "案"; }
.line-icon.quality::before { content: "盾"; font-size: 12px; }
.line-icon.service::before { content: "服"; }
.line-icon.chip::before { content: "芯"; font-size: 12px; }
.line-icon.link::before { content: "联"; }
.line-icon.bulb::before { content: "智"; }
.line-icon.shield::before { content: "安"; }
.line-icon.lock::before { content: "密"; }
.line-icon.cycle::before { content: "全"; }
.line-icon.cert::before { content: "证"; }

.big-icon {
  width: 42px;
  height: 42px;
  margin: 13px auto 1px;
  border-radius: 4px;
}

.big-icon::before { font-size: 18px; }
.big-icon.building::before { content: "楼"; }
.big-icon.tool::before { content: "工"; }
.big-icon.worker::before { content: "施"; }
.big-icon.shield::before { content: "保"; }
.big-icon.headset::before { content: "服"; }

@media (max-width: 1160px) {
  .wrap {
    width: min(100% - 36px, var(--wrap));
  }

  .brand {
    min-width: 218px;
  }

  .brand strong {
    font-size: 14px;
  }

  .nav a {
    padding: 0 4px;
    font-size: 10px;
  }

  .hero-copy {
    padding-left: 0;
  }

  .hero-logo {
    margin-left: 70px;
  }
}

@media (max-width: 760px) {
  .site-header,
  .header-inner {
    height: 60px;
  }

  .brand img {
    width: 45px;
    height: 45px;
  }

  .menu-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: 60px;
    right: 18px;
    left: 18px;
    display: none;
    height: auto;
    padding: 8px;
    border: 1px solid var(--line);
    background: #fff;
    box-shadow: 0 12px 30px rgba(0,0,0,.10);
  }

  .nav.open {
    display: grid;
  }

  .nav a {
    height: 38px;
    padding: 0 12px;
  }

  .nav a::after {
    display: none;
  }

  .hero-inner,
  .two-col,
  .tech-layout,
  .culture-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero,
  .hero-inner {
    min-height: auto;
  }

  .hero-copy {
    padding-top: 20px;
  }

  .hero-logo {
    width: 110px;
    height: 110px;
    margin-left: 0;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero-slogan {
    font-size: 23px;
  }

  .hero-role {
    font-size: 18px;
  }

  .hero-art {
    padding-top: 22px;
  }

  .about-points,
  .service-grid,
  .tech-grid,
  .capacity-grid,
  .credential-grid,
  .culture-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .map,
  .contact-form {
    margin-top: 0;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 13px;
  }

  .wrap {
    width: calc(100% - 28px);
  }

  .brand {
    min-width: 0;
  }

  .brand strong {
    max-width: 230px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .hero {
    background: #fff;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-slogan {
    font-size: 20px;
  }

  .hero-actions {
    gap: 12px;
  }

  .btn {
    flex: 1;
    width: auto;
  }

  .section {
    padding: 34px 0;
  }

  h2 {
    font-size: 25px;
  }

  .about-points,
  .service-grid,
  .tech-grid,
  .capacity-grid,
  .credential-grid,
  .culture-grid {
    grid-template-columns: 1fr;
  }

  .about-points {
    border-right: 0;
  }

  .about-points article {
    border-right: 1px solid var(--line);
  }

  .contact-form label {
    grid-template-columns: 1fr;
  }

  .submit {
    width: 100%;
  }
}