:root {
  color-scheme: dark;
  --bg: #03050b;
  --panel: rgba(12, 17, 31, 0.72);
  --panel-strong: rgba(15, 20, 36, 0.92);
  --line: rgba(255, 255, 255, 0.12);
  --text: #f5f7ff;
  --muted: #aab2c5;
  --dim: #70798e;
  --cyan: #50e9ff;
  --purple: #641eff;
  --violet: #8b5cff;
  --orange: #ff8a2f;
  --radius: 8px;
  --display-font: "Alibaba PuHuiTi", "Alibaba PuHuiTi 3.0", "AlibabaPuHuiTi", "Alibaba Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 72% 16%, rgba(98, 30, 255, 0.18), transparent 26%),
    radial-gradient(circle at 22% 30%, rgba(80, 233, 255, 0.12), transparent 24%),
    linear-gradient(180deg, #050711 0%, #020309 100%);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

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

.site-shell {
  position: relative;
  overflow: hidden;
}

.site-shell::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 76%);
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1180px, calc(100% - 40px));
  height: 72px;
  margin: 16px auto 0;
  padding: 0 14px 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(5, 8, 18, 0.72);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(22px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  box-shadow: 0 0 24px rgba(80, 233, 255, 0.22);
}

.brand span {
  font-family: var(--display-font);
  font-size: 19px;
  font-weight: 800;
  line-height: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-action,
.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: var(--radius);
  font-weight: 700;
  white-space: nowrap;
}

.nav-action,
.primary-btn {
  background: linear-gradient(135deg, var(--purple), #7f35ff 52%, var(--cyan));
  color: white;
  box-shadow: 0 14px 42px rgba(100, 30, 255, 0.32);
}

.secondary-btn {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  color: #dce4f7;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 520px);
  gap: 72px;
  width: min(1180px, calc(100% - 40px));
  min-height: calc(100vh - 88px);
  margin: 0 auto;
  padding: 96px 0 84px;
  align-items: center;
}

.hero-map {
  position: absolute;
  inset: 34px -90px 28px;
  z-index: -1;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  opacity: 0.7;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(3, 5, 11, 0.96), rgba(3, 5, 11, 0.56) 48%, rgba(3, 5, 11, 0.98)),
    url("./assets/screen-live.png") center / cover;
  filter: saturate(0.52);
}

.hero-map::after {
  position: absolute;
  inset: 0;
  content: "";
  background: rgba(0, 0, 0, 0.52);
  backdrop-filter: blur(18px);
}

.eyebrow,
.screen-kicker,
.section-heading span,
.security-card span,
.contact-panel span {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  color: #d9fbff;
}

.eyebrow span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 24px var(--cyan);
}

.hero h1,
.section-heading h2,
.security h2,
.contact h2 {
  margin: 0;
  font-family: var(--display-font);
  font-weight: 900;
  line-height: 1.06;
}

.hero h1 {
  font-size: clamp(42px, 5vw, 72px);
  text-shadow: 0 0 34px rgba(80, 233, 255, 0.22);
}

.hero-copy p {
  max-width: 620px;
  margin: 28px 0 0;
  color: #c9d1e4;
  font-size: 20px;
  line-height: 1.8;
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 560px;
  margin: 46px 0 0;
}

.hero-stats div {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.045);
  backdrop-filter: blur(16px);
}

.hero-stats dt {
  font-family: var(--display-font);
  font-weight: 900;
  font-size: 34px;
}

.hero-stats dd {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-visual {
  position: relative;
  min-height: 700px;
}

.phone {
  position: relative;
  margin: 0;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  overflow: hidden;
  background: #05060d;
  box-shadow:
    0 38px 110px rgba(0, 0, 0, 0.62),
    0 0 0 1px rgba(80, 233, 255, 0.08);
}

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

.phone-main {
  position: absolute;
  right: 40px;
  top: 34px;
  width: min(360px, 78vw);
  height: 708px;
  transform: rotate(2deg);
}

.floating-card {
  position: absolute;
  z-index: 2;
  margin: 0;
  border: 1px solid rgba(80, 233, 255, 0.34);
  border-radius: 8px;
  overflow: hidden;
  background: rgba(4, 7, 15, 0.9);
  box-shadow: 0 24px 72px rgba(0, 0, 0, 0.5);
}

.floating-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.float-a {
  left: 0;
  top: 140px;
  width: 180px;
  height: 390px;
  transform: rotate(-5deg);
}

.float-b {
  right: 0;
  bottom: 84px;
  width: 170px;
  height: 368px;
  transform: rotate(6deg);
}

.orbit {
  position: absolute;
  border: 1px solid rgba(80, 233, 255, 0.22);
  border-radius: 50%;
  pointer-events: none;
}

.orbit-one {
  inset: 72px -48px 72px -72px;
  transform: rotate(-18deg);
}

.orbit-two {
  inset: 142px 20px 132px -18px;
  border-color: rgba(100, 30, 255, 0.28);
  transform: rotate(24deg);
}

.feature-strip,
.showcase,
.security,
.contact,
.footer {
  width: min(1180px, calc(100% - 40px));
  margin-right: auto;
  margin-left: auto;
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding: 20px 0 96px;
}

.feature-strip article,
.screen-stage,
.security-card,
.security-grid article,
.contact-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(18px);
}

.feature-strip article {
  min-height: 220px;
  padding: 26px;
}

.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 28px;
  border-radius: 50%;
  background: rgba(100, 30, 255, 0.18);
  color: var(--cyan);
  font-weight: 900;
}

.feature-strip h2,
.security-grid h3 {
  margin: 0;
  font-size: 24px;
}

.feature-strip p,
.section-heading p,
.screen-copy p,
.security-card p,
.security-grid p {
  color: var(--muted);
  line-height: 1.75;
}

.feature-strip p {
  margin: 14px 0 0;
  font-size: 15px;
}

.showcase {
  padding: 0 0 106px;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

.section-heading h2,
.security h2,
.contact h2 {
  margin-top: 12px;
  font-size: clamp(28px, 3.2vw, 44px);
}

.section-heading p {
  margin: 18px 0 0;
  font-size: 17px;
}

.screen-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.screen-tabs button {
  height: 42px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
}

.screen-tabs button.is-active {
  color: white;
  border-color: rgba(80, 233, 255, 0.48);
  background: rgba(80, 233, 255, 0.12);
}

.screen-stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 420px);
  gap: 48px;
  min-height: 650px;
  padding: 56px;
  overflow: hidden;
}

.screen-stage::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    linear-gradient(90deg, rgba(5, 7, 17, 0.96), rgba(5, 7, 17, 0.55)),
    url("./assets/screen-stay-map.jpg") center / cover;
  filter: blur(12px) saturate(0.6);
  transform: scale(1.04);
}

.screen-copy {
  align-self: center;
}

.screen-copy h3 {
  margin: 18px 0 0;
  font-family: var(--display-font);
  font-weight: 900;
  font-size: clamp(30px, 3.6vw, 48px);
  line-height: 1.08;
}

.screen-copy p:not(.screen-kicker) {
  max-width: 520px;
  margin-top: 20px;
  font-size: 18px;
}

.screen-phone {
  justify-self: center;
  width: min(360px, 100%);
  height: 620px;
}

.security {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 18px;
  padding-bottom: 106px;
}

.security-card {
  padding: 42px;
}

.security-card p {
  max-width: 660px;
  margin: 28px 0 0;
  font-size: 17px;
}

.security-grid {
  display: grid;
  gap: 18px;
}

.security-grid article {
  padding: 26px;
}

.security-grid p {
  margin: 10px 0 0;
}

.contact {
  padding-bottom: 56px;
}

.contact-panel {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
  padding: 30px;
  background:
    linear-gradient(135deg, rgba(100, 30, 255, 0.18), rgba(80, 233, 255, 0.08)),
    var(--panel-strong);
}

.contact-panel img {
  width: 68px;
  height: 68px;
  border-radius: 8px;
}

.contact-panel h2 {
  margin-top: 8px;
  font-size: clamp(24px, 2.7vw, 36px);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.contact-panel a,
.support-card a {
  padding: 14px 18px;
  border: 1px solid rgba(80, 233, 255, 0.36);
  border-radius: var(--radius);
  color: #eafcff;
  background: rgba(80, 233, 255, 0.08);
  font-weight: 800;
}

.support-site {
  min-height: 100vh;
}

.support-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 32px;
  width: min(1180px, calc(100% - 40px));
  min-height: 620px;
  margin: 0 auto;
  padding: 96px 0 68px;
  align-items: center;
}

.support-map {
  position: absolute;
  inset: 34px -90px 28px;
  z-index: -1;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(3, 5, 11, 0.96), rgba(3, 5, 11, 0.58), rgba(3, 5, 11, 0.98)),
    url("./assets/screen-history.png") center / cover;
  filter: saturate(0.5);
}

.support-map::after {
  position: absolute;
  inset: 0;
  content: "";
  background: rgba(0, 0, 0, 0.58);
  backdrop-filter: blur(20px);
}

.support-label {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.support-copy h1 {
  margin: 18px 0 0;
  font-family: var(--display-font);
  font-size: clamp(42px, 5vw, 72px);
  font-weight: 900;
  line-height: 1.06;
  text-shadow: 0 0 34px rgba(80, 233, 255, 0.22);
}

.support-copy p {
  max-width: 660px;
  margin: 28px 0 0;
  color: #c9d1e4;
  font-size: 20px;
  line-height: 1.8;
}

.support-card {
  display: grid;
  gap: 12px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(100, 30, 255, 0.22), rgba(80, 233, 255, 0.08)),
    var(--panel-strong);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(18px);
}

.support-card img {
  width: 72px;
  height: 72px;
  margin-bottom: 12px;
  border-radius: 8px;
}

.support-card span {
  color: var(--muted);
  font-size: 14px;
}

.support-card strong {
  font-family: var(--display-font);
  font-size: 36px;
  font-weight: 900;
  line-height: 1;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 0 0 96px;
}

.support-grid article {
  min-height: 220px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(18px);
}

.support-grid span {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 28px;
  border-radius: 50%;
  background: rgba(100, 30, 255, 0.18);
  color: var(--cyan);
  font-weight: 900;
}

.support-grid h2 {
  margin: 0;
  font-size: 24px;
}

.support-grid p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 0 0 34px;
  color: var(--dim);
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
}

@media (max-width: 980px) {
  .nav {
    height: auto;
    min-height: 68px;
  }

  .nav-links {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 30px;
    padding-top: 64px;
  }

  .hero-visual {
    min-height: 620px;
  }

  .phone-main {
    left: 50%;
    right: auto;
    transform: translateX(-50%) rotate(2deg);
  }

  .float-a {
    left: 2%;
  }

  .float-b {
    right: 2%;
  }

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

  .screen-stage,
  .security,
  .support-hero {
    grid-template-columns: 1fr;
  }

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

  .contact-panel {
    grid-template-columns: 1fr;
  }

  .contact-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .nav,
  .hero,
  .feature-strip,
  .showcase,
  .security,
  .contact,
  .footer {
    width: min(100% - 28px, 1180px);
  }

  .brand span {
    font-size: 18px;
  }

  .nav-action {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-bottom: 56px;
  }

  .hero-copy p {
    font-size: 17px;
  }

  .hero-stats,
  .feature-strip {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 570px;
  }

  .phone-main {
    width: 285px;
    height: 560px;
  }

  .floating-card {
    display: none;
  }

  .screen-stage {
    min-height: auto;
    padding: 26px;
  }

  .screen-phone {
    height: 560px;
  }

  .security-card {
    padding: 28px;
  }

  .support-hero,
  .support-grid {
    width: min(100% - 28px, 1180px);
  }

  .support-hero {
    min-height: auto;
    padding-top: 64px;
  }

  .support-copy p {
    font-size: 17px;
  }

  .support-grid {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
  }
}