:root {
  color-scheme: dark;
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui,
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #15201d;
  background: #f4f7f5;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  letter-spacing: 0;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  background: #f4f7f5;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: #f4f7f5;
}

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

.page-shell {
  display: flex;
  width: min(100% - 48px, 1240px);
  min-height: 100vh;
  margin: 0 auto;
  flex-direction: column;
}

.site-header {
  display: flex;
  min-height: 88px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #dce3df;
}

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

.brand-logo {
  display: block;
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.brand-name {
  color: #15201d;
  font-size: 19px;
  font-weight: 700;
}

.header-login {
  display: inline-flex;
  min-height: 40px;
  padding: 0 17px;
  align-items: center;
  justify-content: center;
  border: 1px solid #cbd5d0;
  border-radius: 6px;
  color: #263a34;
  font-size: 14px;
  font-weight: 600;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.header-login:hover {
  border-color: #5bbfa8;
  background: #e9f1ed;
}

.hero {
  display: grid;
  flex: 1;
  grid-template-columns: minmax(0, 1.08fr) minmax(420px, 0.92fr);
  align-items: center;
  gap: clamp(48px, 7vw, 104px);
  padding: 72px 0 64px;
}

.hero-copy {
  max-width: 650px;
}

.status-line {
  display: inline-flex;
  min-height: 30px;
  padding: 0 11px;
  align-items: center;
  gap: 8px;
  border: 1px solid #c3ded5;
  border-radius: 999px;
  background: #e8f3ee;
  color: #24715d;
  font-size: 12px;
  font-weight: 600;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ee1ad;
  box-shadow: 0 0 0 4px rgba(50, 154, 125, 0.1);
}

.eyebrow {
  margin: 36px 0 14px;
  color: #24856e;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  font-weight: 700;
}

h1 {
  margin: 0;
  color: #10201b;
  font-size: clamp(48px, 6.1vw, 80px);
  font-weight: 730;
  line-height: 1.08;
}

.hero-description {
  max-width: 570px;
  margin: 28px 0 0;
  color: #53665f;
  font-size: 18px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  margin-top: 40px;
  align-items: center;
  gap: 20px;
}

.primary-action {
  display: inline-flex;
  min-width: 164px;
  min-height: 52px;
  padding: 0 22px;
  align-items: center;
  justify-content: center;
  gap: 18px;
  border: 1px solid #5fe1c6;
  border-radius: 6px;
  background: #5fe1c6;
  box-shadow: 0 14px 36px rgba(28, 166, 139, 0.16);
  color: #071b20;
  font-size: 15px;
  font-weight: 750;
  transition: background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.primary-action span {
  font-size: 20px;
  line-height: 1;
}

.primary-action:hover {
  border-color: #8cebd7;
  background: #8cebd7;
  transform: translateY(-2px);
}

.action-note {
  color: #70807a;
  font-size: 13px;
}

.signal-panel {
  position: relative;
  overflow: hidden;
  min-height: 520px;
  border: 1px solid rgba(142, 173, 207, 0.18);
  border-radius: 8px;
  background: #0a1718;
  box-shadow: 0 28px 70px rgba(20, 42, 35, 0.17);
}

.signal-panel::before,
.signal-panel::after {
  position: absolute;
  background: rgba(129, 163, 200, 0.12);
  content: "";
}

.signal-panel::before {
  top: 56px;
  bottom: 96px;
  left: 50%;
  width: 1px;
}

.signal-panel::after {
  top: calc(50% - 20px);
  right: 0;
  left: 0;
  height: 1px;
}

.signal-topbar {
  position: relative;
  z-index: 2;
  display: flex;
  min-height: 56px;
  padding: 0 20px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(142, 173, 207, 0.15);
  color: #73869e;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 11px;
  font-weight: 700;
}

.live-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #77ddbf;
}

.live-label i {
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ee1ad;
}

.signal-visual {
  position: relative;
  height: 366px;
}

.signal-core {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  display: grid;
  width: 140px;
  height: 140px;
  border: 1px solid rgba(90, 220, 195, 0.34);
  border-radius: 32px;
  background: #0b1830;
  box-shadow: 0 0 60px rgba(57, 216, 231, 0.13);
  place-items: center;
  transform: translate(-50%, -50%);
}

.signal-core img {
  display: block;
  width: 112px;
  height: 112px;
}

.signal-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(126, 160, 195, 0.17);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-one {
  width: 246px;
  height: 246px;
}

.orbit-two {
  width: 340px;
  height: 340px;
  border-style: dashed;
}

.node {
  position: absolute;
  z-index: 2;
  width: 11px;
  height: 11px;
  border: 2px solid #0a172b;
  border-radius: 50%;
  background: #55dbc2;
  box-shadow: 0 0 18px rgba(85, 219, 194, 0.7);
}

.node-one {
  top: 78px;
  left: 33%;
}

.node-two {
  top: 54%;
  right: 19%;
}

.node-three {
  bottom: 66px;
  left: 25%;
}

.metrics {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: 96px;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(142, 173, 207, 0.15);
}

.metric {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.metric + .metric {
  border-left: 1px solid rgba(142, 173, 207, 0.15);
}

.metric-value {
  color: #e5ecf5;
  font-size: 17px;
  font-weight: 700;
}

.metric-label {
  color: #71849a;
  font-size: 11px;
}

.site-footer {
  display: flex;
  min-height: 66px;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid #dce3df;
  color: #71817b;
  font-size: 12px;
}

.footer-domain {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

a:focus-visible {
  outline: 3px solid rgba(95, 225, 198, 0.42);
  outline-offset: 4px;
}

@media (max-width: 940px) {
  .page-shell {
    width: min(100% - 40px, 720px);
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 54px;
    padding-top: 64px;
  }

  .hero-copy {
    max-width: 680px;
  }

  .signal-panel {
    min-height: 500px;
  }
}

@media (max-width: 560px) {
  .page-shell {
    width: min(100% - 32px, 720px);
  }

  .site-header {
    min-height: 72px;
  }

  .brand-logo {
    width: 36px;
    height: 36px;
  }

  .header-login {
    min-height: 38px;
    padding: 0 13px;
  }

  .hero {
    gap: 42px;
    padding: 48px 0 42px;
  }

  .eyebrow {
    margin-top: 30px;
  }

  h1 {
    font-size: clamp(42px, 13vw, 58px);
  }

  .hero-description {
    margin-top: 22px;
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 13px;
  }

  .primary-action {
    width: 100%;
  }

  .action-note {
    align-self: center;
  }

  .signal-panel {
    min-height: 404px;
  }

  .signal-visual {
    height: 270px;
  }

  .signal-core {
    width: 112px;
    height: 112px;
    border-radius: 26px;
  }

  .signal-core img {
    width: 88px;
    height: 88px;
  }

  .orbit-one {
    width: 184px;
    height: 184px;
  }

  .orbit-two {
    width: 252px;
    height: 252px;
  }

  .node-one {
    top: 48px;
  }

  .node-three {
    bottom: 46px;
  }

  .metrics {
    min-height: 78px;
  }

  .metric-value {
    font-size: 15px;
  }

  .site-footer {
    min-height: 58px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}