:root {
  color-scheme: light;
  --blue-950: #06245f;
  --blue-900: #083179;
  --blue-700: #075ee8;
  --blue-600: #0b72ff;
  --blue-100: #dbeafe;
  --cyan-500: #14b8ff;
  --ink: #10203f;
  --muted: #5b6b86;
  --line: #dbe5f5;
  --surface: #ffffff;
  --surface-soft: #f4f8ff;
  --shadow: 0 24px 70px rgba(8, 49, 121, 0.16);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: #ffffff;
  line-height: 1.65;
}

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

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

.container {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -44px;
  z-index: 30;
  padding: 10px 14px;
  border-radius: 6px;
  background: var(--blue-950);
  color: #fff;
  transition: top 160ms ease;
}

.skip-link:focus {
  top: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(219, 229, 245, 0.9);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  box-shadow: 0 10px 24px rgba(11, 114, 255, 0.2);
}

.brand strong {
  display: block;
  color: var(--blue-950);
  font-size: 18px;
  line-height: 1.2;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: #30415f;
  font-weight: 600;
  font-size: 14px;
}

.nav a {
  padding: 10px 0;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--blue-700);
}

.header-cta,
.btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border-radius: var(--radius);
  font-weight: 700;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.header-cta {
  padding: 10px 18px;
  background: var(--blue-700);
  color: #fff;
  box-shadow: 0 10px 24px rgba(7, 94, 232, 0.22);
}

.btn {
  padding: 12px 20px;
  border: 1px solid transparent;
}

.btn.primary {
  background: var(--blue-700);
  color: #fff;
  box-shadow: 0 16px 36px rgba(7, 94, 232, 0.26);
}

.btn.secondary {
  border-color: var(--line);
  background: #fff;
  color: var(--blue-900);
}

.btn:hover,
.btn:focus-visible,
.header-cta:hover,
.header-cta:focus-visible {
  transform: translateY(-1px);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 82px 0 56px;
  background:
    linear-gradient(115deg, rgba(219, 234, 254, 0.78), rgba(255, 255, 255, 0.86) 42%, rgba(224, 247, 255, 0.7)),
    radial-gradient(circle at 90% 10%, rgba(20, 184, 255, 0.22), transparent 34%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.96fr);
  gap: 54px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue-700);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

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

h1 {
  margin-bottom: 20px;
  color: var(--blue-950);
  font-size: clamp(38px, 6vw, 62px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 680px;
  color: #314363;
  font-size: 18px;
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 34px;
}

.trust-row span,
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(7, 94, 232, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.78);
  color: #27405f;
  font-size: 14px;
  font-weight: 650;
  padding: 10px 12px;
}

.product-card {
  border: 1px solid rgba(219, 229, 245, 0.9);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.app-titlebar {
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 18px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #fbfdff, #f5f9ff);
}

.app-titlebar strong {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--blue-950);
}

.app-titlebar img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.status {
  color: #087a4b;
  font-size: 13px;
  font-weight: 800;
}

.app-body {
  padding: 28px;
}

.connect-panel {
  min-height: 245px;
  display: grid;
  place-items: center;
  text-align: center;
  border-radius: 14px;
  background: linear-gradient(160deg, #eef6ff, #ffffff);
  border: 1px solid rgba(219, 229, 245, 0.9);
}

.connect-ring {
  width: 118px;
  height: 118px;
  display: grid;
  place-items: center;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: conic-gradient(from 120deg, var(--blue-700), var(--cyan-500), var(--blue-700));
  box-shadow: 0 18px 42px rgba(7, 94, 232, 0.25);
}

.connect-ring img {
  width: 76px;
  height: 76px;
  border-radius: 18px;
}

.connect-panel h2 {
  margin-bottom: 6px;
  color: var(--blue-950);
}

.metric-grid,
.device-grid,
.feature-grid {
  display: grid;
  gap: 16px;
}

.metric-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-top: 16px;
}

.metric {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: #fff;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.metric strong {
  display: block;
  color: var(--blue-900);
  font-size: 18px;
}

.section {
  padding: 72px 0;
}

.section.soft {
  background: var(--surface-soft);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 32px;
}

.section-heading.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-heading h2 {
  margin-bottom: 10px;
  color: var(--blue-950);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.18;
}

.section-heading p {
  color: var(--muted);
}

.device-grid {
  grid-template-columns: repeat(5, 1fr);
}

.device-card,
.feature-card,
.download-panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 14px 34px rgba(16, 32, 63, 0.07);
}

.device-card {
  padding: 20px;
}

.device-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  border-radius: 10px;
  background: var(--blue-100);
  color: var(--blue-700);
  font-weight: 900;
}

.device-card h3,
.feature-card h3 {
  margin-bottom: 8px;
  color: var(--blue-950);
}

.device-card p,
.feature-card p,
.download-panel p {
  color: var(--muted);
}

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

.feature-card {
  padding: 24px;
}

.download-hero {
  padding: 58px 0 44px;
  background: linear-gradient(120deg, #eef6ff, #ffffff 58%, #e8fbff);
}

.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 30px;
  align-items: center;
  padding: 34px;
}

.download-panel h1 {
  font-size: clamp(34px, 5vw, 52px);
}

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

.platform-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.platform-item strong {
  color: var(--blue-950);
}

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

.download-box {
  padding: 22px;
  border-radius: 14px;
  background: var(--blue-950);
  color: #fff;
}

.download-box img {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  margin-bottom: 18px;
}

.download-box p {
  color: rgba(255, 255, 255, 0.78);
}

.download-box .btn {
  width: 100%;
  background: #fff;
  color: var(--blue-900);
}

.site-footer {
  padding: 30px 0;
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-links {
  display: flex;
  gap: 16px;
  color: var(--blue-900);
  font-weight: 650;
}

svg {
  flex: none;
}

@media (max-width: 900px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .header-cta {
    width: 100%;
  }

  .hero-grid,
  .download-panel {
    grid-template-columns: 1fr;
  }

  .device-grid,
  .feature-grid,
  .trust-row,
  .metric-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 28px, 1160px);
  }

  .hero,
  .section {
    padding: 50px 0;
  }

  .hero-actions,
  .download-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .download-panel,
  .app-body {
    padding: 20px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

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