:root {
  --ink: #18212f;
  --muted: #647083;
  --line: #d9e1eb;
  --paper: #f8fafc;
  --white: #ffffff;
  --teal: #118c83;
  --cyan: #2d9cdb;
  --green: #7ab55c;
  --amber: #d9902e;
  --red: #d45c4c;
  --navy: #213a5a;
  --shadow: 0 24px 70px rgba(25, 44, 71, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding: 12px clamp(18px, 4vw, 56px);
  background: rgba(248, 250, 252, 0.92);
  border-bottom: 1px solid rgba(217, 225, 235, 0.78);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 238px;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--navy));
  border-radius: 8px;
  font-size: 15px;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 6px;
  flex: 1;
}

.nav a,
.header-cta,
.button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 700;
}

.nav a {
  padding: 0 14px;
  color: var(--muted);
}

.nav a:hover {
  color: var(--teal);
  background: #edf7f6;
}

.header-cta {
  padding: 0 18px;
  color: #fff;
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.88fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(44px, 7vw, 86px) clamp(18px, 5vw, 76px) 42px;
  background:
    linear-gradient(90deg, rgba(248, 250, 252, 0.94), rgba(248, 250, 252, 0.78)),
    radial-gradient(circle at 72% 18%, rgba(45, 156, 219, 0.18), transparent 34%),
    linear-gradient(135deg, #f8fafc 0%, #eaf5f3 54%, #eef3f8 100%);
}

.hero-copy,
.hero-visual {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 22px;
  font-size: 52px;
  line-height: 1.12;
  overflow-wrap: anywhere;
}

h1 span {
  display: inline;
}

h2 {
  margin-bottom: 12px;
  font-size: 34px;
  line-height: 1.22;
}

h3 {
  margin-bottom: 10px;
  font-size: 19px;
  line-height: 1.35;
}

.hero-lead {
  max-width: 760px;
  color: #48576b;
  font-size: 18px;
  overflow-wrap: anywhere;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  gap: 8px;
  padding: 0 22px;
  border: 1px solid transparent;
}

.button.primary {
  color: #fff;
  background: var(--teal);
  box-shadow: 0 14px 30px rgba(17, 140, 131, 0.22);
}

.button.secondary {
  color: var(--ink);
  background: #fff;
  border-color: var(--line);
}

.button.wide {
  width: 100%;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 780px;
  margin: 34px 0 0;
}

.hero-stats div {
  min-height: 112px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(217, 225, 235, 0.86);
  border-radius: 8px;
}

.hero-stats dt {
  color: var(--navy);
  font-size: 30px;
  font-weight: 900;
}

.hero-stats dd {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-visual {
  margin: 0;
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 1.08;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

section {
  padding: 82px clamp(18px, 5vw, 76px);
}

.promise-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  padding: 0 clamp(18px, 5vw, 76px);
  background: #d9e1eb;
}

.promise-strip div {
  min-height: 106px;
  display: grid;
  align-content: center;
  gap: 6px;
  padding: 20px 22px;
  background: #162233;
}

.promise-strip strong {
  color: #fff;
  font-size: 18px;
}

.promise-strip span {
  color: #b7c9d8;
  font-size: 14px;
}

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

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

.section-heading.narrow {
  max-width: 680px;
}

.service-band {
  background: #fff;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  min-height: 238px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(31, 45, 61, 0.06);
}

.service-card p,
.timeline p,
.process-steps p,
.contact p,
.contact-card p {
  color: var(--muted);
}

.card-icon {
  display: inline-block;
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  border-radius: 8px;
  background: var(--teal);
  position: relative;
}

.card-icon::before,
.card-icon::after {
  content: "";
  position: absolute;
  background: #fff;
}

.card-icon.network::before {
  width: 24px;
  height: 2px;
  left: 9px;
  top: 20px;
  box-shadow: 0 -8px 0 #fff, 0 8px 0 #fff;
}

.card-icon.system {
  background: var(--cyan);
}

.card-icon.system::before {
  width: 22px;
  height: 16px;
  left: 10px;
  top: 10px;
  border: 2px solid #fff;
  background: transparent;
}

.card-icon.system::after {
  width: 18px;
  height: 2px;
  left: 12px;
  top: 30px;
}

.card-icon.idc {
  background: var(--amber);
}

.card-icon.idc::before {
  width: 22px;
  height: 26px;
  left: 10px;
  top: 8px;
  border: 2px solid #fff;
  background: transparent;
}

.card-icon.idc::after {
  width: 14px;
  height: 2px;
  left: 14px;
  top: 16px;
  box-shadow: 0 6px 0 #fff, 0 12px 0 #fff;
}

.card-icon.cloud {
  background: var(--green);
}

.card-icon.cloud::before {
  width: 24px;
  height: 12px;
  left: 9px;
  top: 18px;
  border-radius: 12px;
}

.card-icon.db {
  background: var(--navy);
}

.card-icon.db::before {
  width: 22px;
  height: 9px;
  left: 10px;
  top: 10px;
  border-radius: 50%;
  box-shadow: 0 8px 0 #fff, 0 16px 0 #fff;
}

.card-icon.security {
  background: var(--red);
}

.card-icon.security::before {
  width: 20px;
  height: 24px;
  left: 11px;
  top: 9px;
  clip-path: polygon(50% 0, 90% 14%, 84% 72%, 50% 100%, 16% 72%, 10% 14%);
}

.capability {
  background: linear-gradient(180deg, #eef6f4 0%, #f8fafc 100%);
}

.capability-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: 24px;
  align-items: stretch;
}

.capability-panel,
.stack-panel,
.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 16px 36px rgba(31, 45, 61, 0.08);
}

.capability-panel {
  padding: 28px;
}

.check-list {
  display: grid;
  gap: 13px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 15px;
  height: 15px;
  border-radius: 4px;
  background: var(--teal);
  box-shadow: inset 0 0 0 4px #dff3f1;
}

.stack-panel {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 10px;
  padding: 28px;
}

.stack-panel span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 13px;
  color: #243449;
  background: #f3f6f9;
  border: 1px solid #dfe7ef;
  border-radius: 8px;
  font-weight: 700;
}

.cases-band {
  background: #fff;
}

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

.timeline article {
  min-height: 272px;
  padding: 24px;
  border-left: 4px solid var(--teal);
  background: #f8fafc;
  border-radius: 8px;
}

.timeline span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 18px;
  color: #fff;
  background: var(--navy);
  border-radius: 8px;
  font-weight: 900;
}

.process {
  background: #f1f6f7;
}

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

.process-steps article {
  min-height: 154px;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.process-steps strong {
  display: block;
  margin-bottom: 8px;
  color: var(--teal);
  font-size: 21px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 26px;
  align-items: center;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(24, 33, 47, 0.96), rgba(33, 58, 90, 0.94)),
    url("assets/idc-operations-hero.png") center/cover;
}

.contact .eyebrow,
.contact h2 {
  color: #fff;
}

.contact p {
  max-width: 740px;
  color: #d9e5ef;
}

.contact-card {
  padding: 22px;
}

.contact-card .button + .button {
  margin-top: 12px;
}

.contact-card p {
  margin: 14px 0 0;
  color: #5f6c7b;
  font-size: 14px;
}

.footer {
  padding: 24px clamp(18px, 5vw, 76px);
  color: #728094;
  background: #111923;
  font-size: 14px;
}

.footer p {
  margin: 0;
}

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

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

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

  .hero {
    min-height: auto;
  }

  h1 {
    font-size: 42px;
  }

  .service-grid,
  .timeline,
  .process-steps,
  .promise-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-card {
    max-width: 420px;
  }
}

@media (max-width: 640px) {
  .site-header {
    gap: 10px;
    min-height: auto;
  }

  .brand {
    min-width: 0;
    width: 100%;
  }

  .header-cta {
    display: none;
  }

  .nav a {
    padding: 0 12px;
    font-size: 14px;
  }

  h1 {
    font-size: 30px;
    line-height: 1.2;
  }

  h1 span {
    display: block;
  }

  h2 {
    font-size: 27px;
  }

  .hero-lead {
    font-size: 16px;
    word-break: break-all;
  }

  .hero-copy {
    max-width: calc(100vw - 64px);
  }

  .hero-stats,
  .service-grid,
  .timeline,
  .process-steps,
  .promise-strip {
    grid-template-columns: 1fr;
  }

  .hero-stats div,
  .service-card,
  .timeline article,
  .process-steps article {
    min-height: auto;
  }

  section {
    padding-top: 58px;
    padding-bottom: 58px;
  }
}