:root {
  color-scheme: dark;
  --bg: #05060a;
  --bg-deep: #020307;
  --ink: #f7fbff;
  --muted: #aab8c9;
  --line: rgba(255, 255, 255, 0.15);
  --panel: rgba(8, 14, 25, 0.74);
  --panel-solid: #0c111d;
  --cyan: #24d8ff;
  --pink: #ff3ed8;
  --green: #8cff5a;
  --amber: #ffd166;
  --blue: #3f7cff;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(90deg, rgba(36, 216, 255, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    var(--bg);
  background-size: 72px 72px, 72px 72px, auto;
  color: var(--ink);
  font-family:
    Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: 0;
}

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

img,
svg {
  display: block;
}

.container {
  width: min(100% - 40px, var(--max));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 14px max(20px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid transparent;
  transition: background 180ms ease, border-color 180ms ease;
}

.site-header.is-scrolled {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(4, 7, 14, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  width: 46px;
  height: 46px;
  place-items: center;
  flex: 0 0 auto;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  box-shadow:
    0 0 26px rgba(36, 216, 255, 0.2),
    0 0 34px rgba(255, 62, 216, 0.12);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-name {
  overflow: hidden;
  color: #fff;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  padding: 6px;
  backdrop-filter: blur(16px);
}

.site-nav a {
  min-width: 64px;
  border-radius: 999px;
  padding: 9px 14px;
  color: #d7e2ee;
  font-size: 0.92rem;
  text-align: center;
}

.site-nav a:hover,
.site-nav a.is-active {
  background: rgba(36, 216, 255, 0.14);
  color: #fff;
}

.hero {
  position: relative;
  min-height: 84svh;
  isolation: isolate;
  overflow: hidden;
  display: grid;
  align-items: center;
  padding: 112px 0 68px;
}

.hero-image,
.hero-shade,
.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -3;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-shade {
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(3, 5, 10, 0.92), rgba(3, 5, 10, 0.58) 44%, rgba(3, 5, 10, 0.1) 75%),
    linear-gradient(180deg, rgba(3, 5, 10, 0.45), transparent 45%, rgba(3, 5, 10, 0.82));
}

.hero-grid {
  z-index: -1;
  opacity: 0.52;
  background:
    repeating-linear-gradient(0deg, transparent 0 20px, rgba(255, 255, 255, 0.04) 21px),
    repeating-linear-gradient(90deg, transparent 0 20px, rgba(36, 216, 255, 0.05) 21px);
  mask-image: linear-gradient(90deg, #000, transparent 70%);
}

.hero-content {
  max-width: var(--max);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  max-width: 680px;
  margin: 0;
  color: #fff;
  font-size: 4.5rem;
  line-height: 1.02;
  text-shadow: 0 0 36px rgba(36, 216, 255, 0.28);
}

.hero-lead {
  max-width: 620px;
  margin: 24px 0 0;
  color: #dbe8f5;
  font-size: 1.2rem;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0 22px;
  font-weight: 800;
  white-space: nowrap;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.btn svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary,
.btn-download {
  background: linear-gradient(135deg, var(--cyan), var(--blue) 48%, var(--pink));
  color: #fff;
  box-shadow: 0 16px 44px rgba(36, 216, 255, 0.28);
}

.btn-secondary {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  backdrop-filter: blur(12px);
}

.hero-metrics {
  display: grid;
  max-width: 680px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 42px 0 0;
  padding: 1px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
}

.hero-metrics div {
  min-width: 0;
  padding: 18px;
  background: rgba(4, 8, 16, 0.66);
}

.hero-metrics div:first-child {
  border-radius: 7px 0 0 7px;
}

.hero-metrics div:last-child {
  border-radius: 0 7px 7px 0;
}

.hero-metrics dt {
  color: #fff;
  font-size: 2rem;
  font-weight: 900;
  line-height: 1;
}

.hero-metrics dd {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.signal-band {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background:
    linear-gradient(90deg, rgba(36, 216, 255, 0.12), rgba(255, 62, 216, 0.08), rgba(140, 255, 90, 0.1)),
    rgba(2, 3, 7, 0.9);
}

.signal-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 92px;
}

.signal-inner p {
  margin: 0;
  color: #dce7f2;
  line-height: 1.8;
}

.signal-status {
  display: inline-flex;
  min-width: 88px;
  justify-content: center;
  border: 1px solid rgba(140, 255, 90, 0.42);
  border-radius: 999px;
  padding: 8px 14px;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 900;
}

.section {
  padding: 92px 0;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(280px, 0.62fr);
  gap: 44px;
  align-items: end;
  margin-bottom: 34px;
}

.section-head .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -24px;
}

.section-head h2 {
  margin: 0;
  font-size: 2.7rem;
  line-height: 1.14;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.features-section {
  background:
    linear-gradient(180deg, rgba(2, 3, 7, 0.72), rgba(9, 16, 27, 0.94)),
    var(--bg);
}

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

.feature-card,
.platform-card,
.download-panel {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.03));
  box-shadow: 0 22px 58px rgba(0, 0, 0, 0.22);
}

.feature-card {
  min-height: 232px;
  padding: 26px;
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: "";
  position: absolute;
  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan), var(--pink), var(--green));
}

.feature-icon {
  display: inline-grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid rgba(36, 216, 255, 0.32);
  border-radius: 8px;
  background: rgba(36, 216, 255, 0.1);
  color: var(--cyan);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.feature-card h3,
.platform-card h3 {
  margin: 22px 0 10px;
  font-size: 1.2rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.platforms-section {
  background:
    linear-gradient(180deg, rgba(9, 16, 27, 0.94), rgba(4, 7, 12, 0.98)),
    var(--bg-deep);
}

.platform-layout {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.platform-console {
  position: sticky;
  top: 96px;
  border: 1px solid rgba(36, 216, 255, 0.2);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(36, 216, 255, 0.1), rgba(255, 62, 216, 0.06)),
    #08101b;
  padding: 18px;
  box-shadow: inset 0 0 30px rgba(36, 216, 255, 0.08);
}

.console-top {
  display: flex;
  gap: 7px;
  margin-bottom: 16px;
}

.console-top span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
}

.console-top span:nth-child(2) {
  background: var(--pink);
}

.console-top span:nth-child(3) {
  background: var(--green);
}

.console-screen {
  min-height: 176px;
  display: grid;
  align-content: center;
  justify-items: center;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background:
    linear-gradient(rgba(36, 216, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 216, 255, 0.08) 1px, transparent 1px),
    rgba(0, 0, 0, 0.34);
  background-size: 18px 18px;
}

.console-screen p,
.console-screen span {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.console-screen strong {
  color: var(--green);
  font-size: 4rem;
  line-height: 1.1;
  text-shadow: 0 0 24px rgba(140, 255, 90, 0.38);
}

.console-lines {
  display: grid;
  gap: 9px;
  margin-top: 18px;
}

.console-lines span {
  display: block;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.console-lines span:nth-child(1) {
  width: 86%;
}

.console-lines span:nth-child(2) {
  width: 62%;
  background: rgba(36, 216, 255, 0.24);
}

.console-lines span:nth-child(3) {
  width: 74%;
  background: rgba(255, 62, 216, 0.22);
}

.console-lines span:nth-child(4) {
  width: 50%;
  background: rgba(140, 255, 90, 0.2);
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.platform-card {
  padding: 24px;
}

.platform-card h3 {
  margin-top: 0;
  color: #fff;
}

.platform-card ul,
.download-notes {
  list-style: none;
  margin: 0;
  padding: 0;
}

.platform-card li,
.download-notes li {
  position: relative;
  padding-left: 18px;
  color: #d6e1ed;
  line-height: 1.72;
  overflow-wrap: anywhere;
}

.platform-card li::before,
.download-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 7px;
  height: 7px;
  clip-path: polygon(0 0, 100% 50%, 0 100%);
  background: var(--cyan);
}

.platform-card:nth-child(3n + 2) li::before {
  background: var(--pink);
}

.platform-card:nth-child(3n) li::before {
  background: var(--green);
}

.download-section {
  background:
    linear-gradient(90deg, rgba(36, 216, 255, 0.1), transparent 40%),
    linear-gradient(270deg, rgba(255, 62, 216, 0.1), transparent 42%),
    #05070d;
}

.download-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 42px;
  align-items: center;
}

.download-copy h2 {
  margin: 0;
  font-size: 2.8rem;
  line-height: 1.14;
}

.download-copy p:not(.eyebrow) {
  max-width: 660px;
  margin: 18px 0 0;
  color: var(--muted);
  line-height: 1.9;
}

.download-panel {
  padding: 24px;
  background:
    linear-gradient(180deg, rgba(36, 216, 255, 0.14), rgba(255, 62, 216, 0.08)),
    var(--panel-solid);
}

.download-panel-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.download-panel-head strong,
.download-panel-head small {
  display: block;
}

.download-panel-head small {
  margin-top: 4px;
  color: var(--muted);
}

.btn-download {
  width: 100%;
  min-height: 58px;
  font-size: 1.05rem;
}

.download-notes {
  display: grid;
  gap: 7px;
  margin-top: 18px;
}

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: #020307;
}

.footer-inner {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: #8795a7;
  font-size: 0.92rem;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  flex-wrap: wrap;
}

.police-beian {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.police-beian img {
  width: 16px;
  height: 16px;
  object-fit: contain;
}

.footer-inner a:hover {
  color: #fff;
}

@media (max-width: 980px) {
  .site-header {
    min-height: 66px;
  }

  .site-nav a {
    min-width: auto;
  }

  .hero {
    min-height: 82svh;
    padding-top: 104px;
  }

  h1 {
    max-width: 560px;
    font-size: 3.25rem;
  }

  .hero-lead {
    max-width: 560px;
    font-size: 1.05rem;
  }

  .section-head,
  .platform-layout,
  .download-layout {
    grid-template-columns: 1fr;
  }

  .section-head .eyebrow {
    margin-bottom: -14px;
  }

  .platform-console {
    position: relative;
    top: auto;
  }

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

  .download-panel {
    max-width: 460px;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(100% - 28px, var(--max));
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 12px 14px;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
  }

  .site-nav a {
    flex: 1;
    padding-inline: 8px;
  }

  .hero {
    min-height: 76svh;
    padding: 136px 0 42px;
  }

  .hero-image {
    object-position: 62% center;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(3, 5, 10, 0.92), rgba(3, 5, 10, 0.62)),
      linear-gradient(180deg, rgba(3, 5, 10, 0.38), transparent 34%, rgba(3, 5, 10, 0.88));
  }

  h1 {
    font-size: 2.45rem;
  }

  .hero-lead {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

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

  .hero-metrics div {
    padding: 13px 10px;
  }

  .hero-metrics div:first-child {
    border-radius: 7px 0 0 7px;
  }

  .hero-metrics div:last-child {
    border-radius: 0 7px 7px 0;
  }

  .hero-metrics dt {
    font-size: 1.45rem;
  }

  .hero-metrics dd {
    font-size: 0.78rem;
  }

  .signal-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 22px 0;
  }

  .section {
    padding: 68px 0;
  }

  .section-head h2,
  .download-copy h2 {
    font-size: 2rem;
  }

  .feature-grid,
  .platform-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: auto;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 18px 0;
  }

  .footer-links {
    justify-content: flex-start;
  }
}