*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-strong: #0f172a;
  --surface-soft: #eaf0f8;
  --text: #111827;
  --muted: #5d6678;
  --muted-strong: #334155;
  --line: #d9e2ef;
  --primary: #1454d4;
  --primary-dark: #0b2b74;
  --primary-soft: #e6efff;
  --cyan: #18b6d9;
  --green: #16a36f;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
  --radius: 8px;
  --container: 1160px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(100% - 48px, var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(217, 226, 239, 0.9);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  box-shadow: 0 14px 32px rgba(20, 84, 212, 0.25);
}

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

.brand strong {
  font-size: 17px;
  line-height: 1.15;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a {
  position: relative;
  color: var(--muted-strong);
  font-size: 14px;
  font-weight: 600;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -10px;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.18s ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--primary);
}

.site-nav a.is-active::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 80px;
  color: #fff;
  background:
    radial-gradient(circle at 78% 22%, rgba(24, 182, 217, 0.34), transparent 28%),
    linear-gradient(135deg, #08162f 0%, #0f2f67 52%, #10213f 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(420px, 0.98fr);
  gap: 54px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 720px;
  font-size: clamp(42px, 5vw, 68px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-subtitle {
  max-width: 650px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 20px;
}

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

.btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #0f8bd8);
  box-shadow: 0 16px 36px rgba(20, 84, 212, 0.35);
}

.btn-secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.32);
  background: rgba(255, 255, 255, 0.08);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 42px 0 0;
}

.hero-metrics div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
}

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

.hero-metrics dd {
  margin: 4px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.visual-panel {
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 18px;
  background: rgba(8, 18, 38, 0.68);
  box-shadow: var(--shadow);
}

.visual-topline,
.visual-status {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
}

.cloud-map {
  position: relative;
  min-height: 420px;
  margin: 22px 0;
  border-radius: 14px;
  background:
    radial-gradient(circle at center, rgba(24, 182, 217, 0.2), transparent 34%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  overflow: hidden;
}

.node {
  position: absolute;
  z-index: 2;
  min-width: 112px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  background: rgba(15, 35, 76, 0.82);
}

.node-core {
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  padding: 18px 22px;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
}

.node-a { left: 8%; top: 16%; }
.node-b { right: 8%; top: 16%; }
.node-c { left: 8%; bottom: 18%; }
.node-d { right: 8%; bottom: 18%; }
.node-e { left: 50%; bottom: 8%; transform: translateX(-50%); }

.link {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(24, 182, 217, 0.8), transparent);
  transform-origin: center;
}

.link-1 { left: 24%; top: 32%; width: 52%; transform: rotate(18deg); }
.link-2 { left: 24%; bottom: 32%; width: 52%; transform: rotate(-18deg); }
.link-3 { left: 50%; top: 26%; height: 48%; width: 1px; }
.link-4 { left: 20%; top: 50%; width: 60%; }

.section {
  padding: 94px 0;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 42px;
  text-align: center;
}

.section-heading.align-left {
  margin-left: 0;
  text-align: left;
}

.section-heading h2,
.split-section h2,
.contact-panel h2 {
  margin: 0;
  color: var(--text);
  font-size: clamp(30px, 3vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}

.section-heading p:not(.eyebrow),
.split-section p,
.contact-panel p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.challenge-grid,
.capability-grid {
  display: grid;
  gap: 18px;
}

.challenge-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.challenge-card,
.capability-grid article,
.case-card,
.deliverables,
.dev-grid span {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.05);
}

.challenge-card {
  padding: 26px;
}

.challenge-card span,
.process-list span,
.case-label {
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.challenge-card h3,
.capability-grid h3,
.case-card h3,
.deliverables h3 {
  margin: 16px 0 8px;
  font-size: 19px;
  line-height: 1.25;
}

.challenge-card p,
.capability-grid p,
.case-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.capabilities {
  background: var(--surface);
}

.capability-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.capability-grid article {
  padding: 28px;
}

.process {
  background: linear-gradient(180deg, #eef4fb 0%, #f8fafc 100%);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-list li {
  position: relative;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.process-list strong {
  display: block;
  margin-top: 12px;
  font-size: 18px;
}

.process-list p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.case-layout,
.split-section,
.contact-panel,
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
}

.case-card,
.deliverables {
  padding: 32px;
}

.deliverables ul {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.deliverables li + li {
  margin-top: 10px;
}

.development {
  background: var(--surface-strong);
  color: #fff;
}

.development h2 {
  color: #fff;
}

.development p {
  color: rgba(255, 255, 255, 0.72);
}

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

.dev-grid span {
  padding: 18px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.14);
}

.contact-panel {
  padding: 42px;
  border-radius: 18px;
  color: #fff;
  background:
    radial-gradient(circle at 86% 20%, rgba(24, 182, 217, 0.35), transparent 28%),
    linear-gradient(135deg, var(--primary-dark), #10213f);
  box-shadow: var(--shadow);
}

.contact-panel h2 {
  color: #fff;
}

.contact-panel p {
  color: rgba(255, 255, 255, 0.72);
}

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

.contact-list a,
.contact-list span {
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
}

.site-footer {
  padding: 28px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.footer-inner {
  font-size: 13px;
}

.footer-inner span:last-child {
  text-align: right;
}

@media (max-width: 1040px) {
  .hero-grid,
  .case-layout,
  .split-section,
  .contact-panel,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 38px;
  }

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

  .process-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-inner span:last-child {
    text-align: left;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(100% - 32px, var(--container));
  }

  .header-inner {
    min-height: 64px;
  }

  .menu-toggle {
    width: 42px;
    height: 42px;
    display: inline-grid;
    place-content: center;
    gap: 5px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
  }

  .menu-toggle span {
    width: 18px;
    height: 2px;
    display: block;
    background: var(--text);
  }

  .site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    padding: 10px;
  }

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

  .hero {
    padding: 70px 0 58px;
  }

  .hero h1 {
    font-size: 38px;
  }

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

  .hero-metrics,
  .challenge-grid,
  .capability-grid,
  .process-list,
  .dev-grid {
    grid-template-columns: 1fr;
  }

  .cloud-map {
    min-height: 340px;
  }

  .node {
    min-width: 96px;
    padding: 10px;
    font-size: 12px;
  }

  .section {
    padding: 68px 0;
  }

  .section-heading {
    text-align: left;
  }

  .contact-panel {
    padding: 28px;
  }
}

@media (max-width: 480px) {
  .brand small {
    display: none;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

  .visual-topline,
  .visual-status {
    display: grid;
  }

  .node-a,
  .node-c {
    left: 4%;
  }

  .node-b,
  .node-d {
    right: 4%;
  }
}