:root {
  --ink: #102033;
  --muted: #65758a;
  --line: #dce5ef;
  --page: #f5f8fb;
  --white: #ffffff;
  --blue: #1f63e9;
  --cyan: #00a6d6;
  --green: #15a66a;
  --dark: #08111f;
  --gold: #d59637;
  --shadow: 0 18px 45px rgba(15, 38, 70, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 0 clamp(18px, 4vw, 64px);
  color: #fff;
  background: rgba(8, 17, 31, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(12px);
}

.brand {
  min-width: 240px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  font-weight: 800;
}

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

.brand small {
  color: #a9bdd3;
  font-size: 12px;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  color: #dbe7f5;
  font-size: 14px;
}

.nav a:hover {
  color: #fff;
}

.header-call,
.primary-link,
.secondary-link {
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  padding: 0 18px;
  font-weight: 700;
}

.header-call,
.primary-link {
  color: #fff;
  background: var(--blue);
}

.secondary-link {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.42);
}

.hero {
  min-height: 760px;
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background: var(--dark);
}

.hero-bg,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-bg {
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(8, 17, 31, 0.96) 0%, rgba(8, 17, 31, 0.84) 42%, rgba(8, 17, 31, 0.22) 100%),
    linear-gradient(0deg, rgba(8, 17, 31, 0.88), rgba(8, 17, 31, 0.1) 45%, rgba(8, 17, 31, 0.54));
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(980px, calc(100% - 36px));
  margin-left: clamp(18px, 6vw, 96px);
  padding-top: 72px;
}

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

.hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(42px, 7vw, 84px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 720px;
  margin: 26px 0 0;
  color: #d7e5f4;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 34px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(140px, 1fr));
  gap: 14px;
  max-width: 720px;
  margin: 56px 0 0;
}

.hero-stats div {
  padding: 20px;
  border-left: 3px solid var(--cyan);
  background: rgba(255, 255, 255, 0.08);
}

.hero-stats dt {
  font-size: 28px;
  font-weight: 800;
}

.hero-stats dd {
  margin: 4px 0 0;
  color: #b7c9db;
}

.section {
  width: min(1220px, calc(100% - 36px));
  margin: 0 auto;
  padding: 84px 0;
}

.intro {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(360px, 1fr);
  gap: 56px;
  align-items: start;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
  letter-spacing: 0;
}

.intro p:last-child,
.cases p,
.contact-band p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

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

.product,
.advantage-grid div {
  min-height: 280px;
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 10px 26px rgba(15, 38, 70, 0.05);
}

.product.highlight {
  color: #fff;
  background: linear-gradient(145deg, #12365d, #0b1625 74%);
  border-color: rgba(255, 255, 255, 0.1);
}

.product-icon {
  width: 54px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--blue);
  border-radius: 4px;
  font-weight: 800;
}

.product h3 {
  margin: 22px 0 12px;
  font-size: 21px;
  line-height: 1.3;
}

.product p,
.product li,
.advantage-grid p {
  color: var(--muted);
}

.product.highlight p,
.product.highlight li {
  color: #c4d7ea;
}

.product ul {
  padding-left: 18px;
  margin: 18px 0 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  margin-top: 16px;
  padding: 0 10px;
  color: #106c47;
  background: #e9f7f0;
  border-radius: 3px;
}

.split {
  display: grid;
  grid-template-columns: minmax(360px, 0.96fr) minmax(380px, 1.04fr);
  gap: 52px;
  align-items: center;
}

.visual-panel {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  border-radius: 6px;
  background: var(--dark);
  box-shadow: var(--shadow);
}

.visual-panel img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
}

.server-stack {
  position: absolute;
  left: 42px;
  right: 42px;
  bottom: 42px;
  display: grid;
  gap: 12px;
}

.server-stack span {
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 4px;
  background: rgba(8, 17, 31, 0.7);
  box-shadow: inset 0 0 0 1px rgba(0, 166, 214, 0.26);
}

.steps {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.steps div {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 14px;
  align-items: center;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.steps b {
  color: var(--blue);
  font-size: 22px;
}

.advantage-grid,
.cert-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.advantage-grid div {
  min-height: 190px;
}

.advantage-grid strong {
  display: block;
  font-size: 20px;
  margin-bottom: 12px;
}

.cases {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(420px, 1.1fr);
  gap: 48px;
  align-items: start;
}

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

.cert-list span {
  min-height: 64px;
  display: flex;
  align-items: center;
  padding: 16px 18px;
  background: #fff;
  border-left: 4px solid var(--green);
  box-shadow: 0 8px 22px rgba(15, 38, 70, 0.05);
}

.contact-band {
  color: #fff;
  background: linear-gradient(135deg, #08111f, #17395f 62%, #0c6d79);
}

.contact-inner {
  width: min(1220px, calc(100% - 36px));
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(420px, 1.1fr);
  gap: 48px;
  align-items: center;
  margin: 0 auto;
  padding: 78px 0;
}

.contact-band h2 {
  margin-bottom: 18px;
}

.contact-band p {
  color: #c7d7e6;
}

.contact-box {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.contact-box a,
.contact-box p {
  min-height: 92px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin: 0;
  padding: 20px;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 6px;
}

.contact-box b {
  margin-bottom: 6px;
  color: #9ee8ff;
}

.footer {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 0 clamp(18px, 4vw, 64px);
  color: #8a9aad;
  background: #070d16;
  font-size: 14px;
}

@media (max-width: 1080px) {
  .nav {
    display: none;
  }

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

@media (max-width: 820px) {
  .site-header {
    position: absolute;
    height: auto;
    align-items: flex-start;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .brand {
    min-width: 0;
  }

  .header-call {
    display: none;
  }

  .hero {
    min-height: 720px;
  }

  .hero-content {
    padding-top: 104px;
  }

  .hero-stats,
  .intro,
  .split,
  .cases,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .product-grid,
  .advantage-grid,
  .cert-list,
  .contact-box {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 58px 0;
  }
}

@media (max-width: 520px) {
  .hero h1 {
    font-size: 38px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .primary-link,
  .secondary-link {
    width: 100%;
  }

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