:root {
  color-scheme: light;
  --ink: #10172a;
  --muted: #5e687d;
  --line: #dce2ec;
  --paper: #f7f8fb;
  --white: #ffffff;
  --navy: #0b1530;
  --navy-soft: #121f3d;
  --blue: #2468f2;
  --blue-dark: #1552cb;
  --cyan: #59c5e8;
  --shell: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--white);
  background: var(--blue);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.shell {
  width: min(calc(100% - 48px), var(--shell));
  margin-inline: auto;
}

.site-header {
  position: absolute;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  color: var(--white);
  border-bottom: 1px solid rgb(255 255 255 / 12%);
}

.header-inner {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

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

.brand-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid rgb(255 255 255 / 28%);
  border-radius: 12px;
  background: var(--blue);
  color: var(--white);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
}

.brand-copy { display: grid; gap: 2px; }
.brand-copy strong { font-size: 20px; letter-spacing: .04em; }
.brand-copy small { color: #aab6cc; font-size: 11px; letter-spacing: .12em; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  color: #c9d2e3;
  font-size: 14px;
}

.main-nav a { transition: color .18s ease, border-color .18s ease, background .18s ease; }
.main-nav a:hover, .main-nav a:focus-visible { color: var(--white); }

.nav-console {
  padding: 10px 17px;
  color: var(--white) !important;
  border: 1px solid rgb(255 255 255 / 30%);
  border-radius: 8px;
}

.nav-console:hover, .nav-console:focus-visible { background: rgb(255 255 255 / 9%); }

.hero {
  overflow: hidden;
  min-height: 760px;
  display: grid;
  align-items: center;
  padding: 154px 0 92px;
  color: var(--white);
  background:
    linear-gradient(90deg, transparent 49.9%, rgb(255 255 255 / 5%) 50%, transparent 50.1%) center / 150px 100%,
    linear-gradient(transparent 49.9%, rgb(255 255 255 / 5%) 50%, transparent 50.1%) center / 100% 150px,
    var(--navy);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, .94fr) minmax(500px, 1.06fr);
  align-items: center;
  gap: 70px;
}

.eyebrow {
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.eyebrow span { width: 22px; height: 2px; background: currentColor; }
.hero .eyebrow, .eyebrow-light { color: #72d4f0; }

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

h1 {
  margin-bottom: 24px;
  font-size: clamp(44px, 4.3vw, 62px);
  line-height: 1.12;
  letter-spacing: -.045em;
}

.hero-lead {
  max-width: 610px;
  margin-bottom: 34px;
  color: #b8c3d7;
  font-size: 18px;
  line-height: 1.9;
}

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

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 23px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { background: var(--blue); color: var(--white); }
.button-primary:hover, .button-primary:focus-visible { background: #3477ff; }
.button-quiet { border: 1px solid rgb(255 255 255 / 26%); color: var(--white); }
.button-quiet:hover, .button-quiet:focus-visible { border-color: rgb(255 255 255 / 50%); background: rgb(255 255 255 / 6%); }

.hero-proof {
  margin: 38px 0 0;
  padding: 22px 0 0;
  display: flex;
  gap: 26px;
  list-style: none;
  color: #aab6cc;
  border-top: 1px solid rgb(255 255 255 / 12%);
  font-size: 13px;
}

.hero-proof li::before { content: ""; width: 5px; height: 5px; display: inline-block; margin: 0 8px 2px 0; background: var(--cyan); }

.system-map {
  padding: 22px;
  border: 1px solid rgb(255 255 255 / 13%);
  border-radius: 24px;
  background: rgb(12 24 51 / 88%);
  box-shadow: 0 28px 80px rgb(0 0 0 / 24%);
}

.map-topline, .map-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #91a0b9;
  font-size: 12px;
}

.map-topline > div { display: flex; align-items: center; gap: 9px; color: #dbe4f2; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #4ee0a1; box-shadow: 0 0 0 4px rgb(78 224 161 / 12%); }

.map-stage {
  position: relative;
  min-height: 410px;
  margin: 18px 0;
  border: 1px solid rgb(255 255 255 / 8%);
  background:
    linear-gradient(90deg, transparent 49.8%, rgb(255 255 255 / 6%) 50%, transparent 50.2%),
    linear-gradient(transparent 49.8%, rgb(255 255 255 / 6%) 50%, transparent 50.2%);
}

.map-stage::before, .map-stage::after {
  content: "";
  position: absolute;
  inset: 50% auto auto 50%;
  border: 1px solid rgb(89 197 232 / 18%);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.map-stage::before { width: 270px; height: 270px; }
.map-stage::after { width: 360px; height: 360px; }

.map-core {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  width: 190px;
  min-height: 126px;
  display: grid;
  place-content: center;
  gap: 7px;
  text-align: center;
  border: 1px solid rgb(89 197 232 / 48%);
  border-radius: 18px;
  background: #102650;
  box-shadow: 0 12px 44px rgb(16 75 163 / 34%);
  transform: translate(-50%, -50%);
}

.map-core small { color: #86a6cf; font-size: 11px; letter-spacing: .12em; }
.map-core strong { font-size: 25px; }
.map-core span { color: #6fd0ec; font-size: 11px; }

.module {
  position: absolute;
  z-index: 3;
  width: 138px;
  padding: 13px 15px;
  display: grid;
  gap: 3px;
  border-left: 2px solid var(--cyan);
  background: #15223e;
  box-shadow: 0 8px 22px rgb(0 0 0 / 18%);
}

.module span { color: #62cce9; font-size: 10px; }
.module strong { font-size: 15px; }
.module small { color: #91a0b9; font-size: 10px; }
.module-property { top: 33px; left: 30px; }
.module-tenant { top: 35px; right: 28px; }
.module-contract { top: 174px; right: 7px; }
.module-billing { right: 42px; bottom: 26px; }
.module-device { bottom: 31px; left: 30px; }

.map-footer { gap: 10px; justify-content: flex-start; }
.map-footer span { padding: 7px 10px; border: 1px solid rgb(255 255 255 / 8%); }

.section { padding: 112px 0; }
.section-heading { margin-bottom: 58px; display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 80px; }
.section-heading h2, .about h2, .workflow h2 { margin-bottom: 0; font-size: clamp(34px, 4vw, 52px); line-height: 1.22; letter-spacing: -.035em; }
.section-heading > p { margin-bottom: 4px; color: var(--muted); line-height: 1.9; }

.capabilities { background: var(--paper); }
.capability-layout { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); border: 1px solid var(--line); background: var(--white); }
.capability-feature { min-height: 520px; padding: 44px; display: flex; flex-direction: column; border-right: 1px solid var(--line); background: var(--navy); color: var(--white); }
.capability-index { color: #5f7195; font-size: 14px; letter-spacing: .12em; }
.capability-label { margin: auto 0 10px; color: #72d4f0; font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.capability-feature h3 { margin-bottom: 18px; font-size: 33px; }
.capability-feature > p:not(.capability-label) { max-width: 450px; color: #aebbd0; line-height: 1.9; }
.feature-flow { margin-top: 32px; display: flex; align-items: center; gap: 8px; color: #c8d2e4; font-size: 11px; white-space: nowrap; }
.feature-flow i { flex: 1; height: 1px; background: #344565; }

.capability-list { display: grid; grid-template-columns: 1fr 1fr; }
.capability-list article { min-height: 210px; padding: 32px; display: flex; gap: 20px; border-bottom: 1px solid var(--line); }
.capability-list article:nth-child(odd) { border-right: 1px solid var(--line); }
.capability-list article:nth-last-child(-n+2) { border-bottom: 0; }
.capability-list article:last-child { grid-column: 1 / -1; min-height: 130px; }
.capability-number { padding-top: 3px; color: var(--blue); font-size: 11px; font-weight: 800; }
.capability-list h3 { margin-bottom: 10px; font-size: 19px; }
.capability-list p { margin-bottom: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

.workflow { color: var(--white); background: var(--navy); }
.workflow-grid { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: 96px; }
.workflow-intro > p:last-child { max-width: 470px; margin: 28px 0 0; color: #aebbd0; line-height: 1.9; }
.workflow-steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid #293854; }
.workflow-steps li { padding: 25px 0; display: grid; grid-template-columns: 54px 1fr; border-bottom: 1px solid #293854; }
.workflow-steps > li > span { color: #63cce9; font-size: 12px; font-weight: 700; }
.workflow-steps strong { font-size: 18px; }
.workflow-steps p { margin: 8px 0 0; color: #9daac0; font-size: 14px; line-height: 1.7; }

.about-grid { display: grid; grid-template-columns: minmax(0, .75fr) minmax(0, 1.25fr); gap: 110px; align-items: start; }
.about-copy { padding-top: 36px; border-top: 1px solid var(--line); }
.about-copy h3 { margin: 0 0 14px; font-size: 20px; letter-spacing: -.015em; }
.about-description { margin: 0 0 28px; color: var(--muted); font-size: 18px; line-height: 2; }
.company-contact { margin: 0 0 28px; display: grid; font-style: normal; border-top: 1px solid var(--line); }
.company-contact div { padding: 18px 0; display: grid; grid-template-columns: 108px 1fr; gap: 20px; border-bottom: 1px solid var(--line); }
.company-contact span { color: var(--muted); font-size: 13px; font-weight: 600; }
.company-contact strong, .company-contact a { color: var(--ink); font-size: 14px; font-weight: 600; line-height: 1.7; }
.company-contact a { width: fit-content; color: var(--blue-dark); }
.about-action { color: var(--blue-dark); font-weight: 700; }
.about-action span { display: inline-block; margin-left: 7px; transition: transform .18s ease; }
.about-action:hover span, .about-action:focus-visible span { transform: translateX(4px); }

.site-footer { color: #c5cede; background: #081126; }
.footer-main { min-height: 140px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.footer-main p { margin: 0; color: #8f9db5; font-size: 13px; }
.footer-legal { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 24px; color: #7d8ba4; border-top: 1px solid #1d2a43; font-size: 12px; }
.footer-legal a:hover, .footer-legal a:focus-visible { color: var(--white); }

:focus-visible { outline: 3px solid #6bd6f2; outline-offset: 3px; }

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero { min-height: 0; }
  .system-map { max-width: 640px; width: 100%; }
  .section-heading, .workflow-grid, .about-grid { grid-template-columns: 1fr; gap: 38px; }
  .capability-layout { grid-template-columns: 1fr; }
  .capability-feature { min-height: 430px; border-right: 0; border-bottom: 1px solid var(--line); }
  .about-copy { padding-top: 28px; }
}

@media (max-width: 720px) {
  .shell { width: min(calc(100% - 32px), var(--shell)); }
  .header-inner { min-height: 72px; }
  .brand-copy small { display: none; }
  .main-nav { gap: 14px; }
  .main-nav a:not(.nav-console) { display: none; }
  .nav-console { padding: 9px 13px; }
  .hero { padding: 126px 0 72px; }
  .hero-grid { gap: 50px; }
  h1 { font-size: clamp(36px, 10.5vw, 42px); }
  .hero-lead { font-size: 16px; }
  .hero-proof { flex-wrap: wrap; gap: 13px 20px; }
  .system-map { padding: 14px; border-radius: 18px; }
  .map-stage { min-height: 370px; }
  .map-stage::before { width: 220px; height: 220px; }
  .map-stage::after { width: 300px; height: 300px; }
  .map-core { width: 154px; min-height: 108px; }
  .module { width: 116px; padding: 10px; }
  .module small { display: none; }
  .module-property { left: 12px; }
  .module-tenant { right: 10px; }
  .module-contract { right: 2px; }
  .module-billing { right: 15px; }
  .module-device { left: 10px; }
  .section { padding: 80px 0; }
  .section-heading { margin-bottom: 38px; }
  .capability-feature { min-height: 390px; padding: 30px 24px; }
  .capability-list { grid-template-columns: 1fr; }
  .capability-list article, .capability-list article:nth-child(odd), .capability-list article:nth-last-child(-n+2) { min-height: 0; padding: 26px 22px; border-right: 0; border-bottom: 1px solid var(--line); }
  .capability-list article:last-child { grid-column: auto; border-bottom: 0; }
  .feature-flow { flex-wrap: wrap; white-space: normal; }
  .feature-flow i { min-width: 18px; }
  .workflow-steps li { grid-template-columns: 40px 1fr; }
  .company-contact div { grid-template-columns: 1fr; gap: 7px; }
  .footer-main, .footer-legal { padding-block: 24px; flex-direction: column; align-items: flex-start; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}