:root {
  color-scheme: light;
  --bg: #f4f8fb;
  --bg-strong: #e9f3f8;
  --card: #ffffff;
  --ink: #071426;
  --muted: #5c6b7d;
  --primary: #0d7ea2;
  --primary-dark: #075c78;
  --accent: #16a3a6;
  --warning: #fff7e5;
  --warning-border: #f0c56b;
  --line: rgba(7, 20, 38, 0.1);
  --shadow: 0 22px 70px rgba(7, 20, 38, 0.12);
  --radius: 28px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(22, 163, 166, 0.2), transparent 34rem),
    linear-gradient(180deg, #f8fcff 0%, var(--bg) 48%, #ffffff 100%);
  color: var(--ink);
  line-height: 1.6;
}

a {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  height: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(7, 20, 38, 0.08);
  background: rgba(248, 252, 255, 0.86);
  backdrop-filter: blur(18px);
}

.nav {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 10px 28px rgba(13, 126, 162, 0.2);
}

.nav-links {
  display: none;
  align-items: center;
  gap: 18px;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--muted);
  font-weight: 650;
  text-decoration: none;
}

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  padding: 72px 0 48px;
}

.hero-grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 8px 12px;
  border: 1px solid rgba(13, 126, 162, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  color: var(--primary-dark);
  font-size: 0.86rem;
  font-weight: 800;
}

.hero h1,
.section h2,
.policy-hero h1 {
  margin: 0;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.hero h1 {
  max-width: 780px;
  font-size: clamp(3rem, 9vw, 6.8rem);
}

.lead {
  max-width: 690px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 30px;
}

.app-store-badge {
  display: inline-flex;
  align-items: center;
  transition: transform 160ms ease, filter 160ms ease;
}

.app-store-badge:hover {
  transform: translateY(-2px);
  filter: drop-shadow(0 12px 24px rgba(7, 20, 38, 0.14));
}

.app-store-badge img {
  width: 180px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 20px;
  border: 1px solid rgba(13, 126, 162, 0.25);
  border-radius: 16px;
  background: #ffffff;
  color: var(--primary-dark);
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 12px 30px rgba(7, 20, 38, 0.08);
}

.button:hover {
  border-color: rgba(13, 126, 162, 0.48);
}

.hero-card {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 36px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(233, 243, 248, 0.8)),
    radial-gradient(circle at top right, rgba(22, 163, 166, 0.24), transparent 18rem);
  box-shadow: var(--shadow);
}

.splash-preview {
  position: relative;
  min-height: 480px;
  padding: 28px;
}

.phone-shell {
  width: min(330px, 100%);
  margin: 0 auto;
  border: 12px solid #071426;
  border-radius: 42px;
  background: #071426;
  box-shadow: 0 34px 76px rgba(7, 20, 38, 0.25);
}

.phone-screen {
  overflow: hidden;
  border-radius: 30px;
  background: linear-gradient(180deg, #f8fdff 0%, #eef8fb 100%);
}

.splash {
  display: grid;
  place-items: center;
  gap: 16px;
  padding: 38px 22px 30px;
  text-align: center;
}

.splash-logo {
  width: 96px;
  border-radius: 24px;
  animation: pulse 2.4s ease-in-out infinite;
  box-shadow: 0 20px 42px rgba(13, 126, 162, 0.25);
}

.splash strong {
  display: block;
  font-size: 1.22rem;
  letter-spacing: -0.03em;
}

.mini-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
  padding: 11px;
  border-top: 1px solid rgba(7, 20, 38, 0.08);
  background: rgba(255, 255, 255, 0.82);
}

.mini-tabs span {
  display: grid;
  place-items: center;
  min-height: 38px;
  border-radius: 12px;
  background: rgba(13, 126, 162, 0.09);
  color: var(--primary-dark);
  font-size: 0.76rem;
  font-weight: 800;
}

.quick-panel {
  padding: 0 18px 22px;
}

.quick-panel h3 {
  margin: 0 0 12px;
  font-size: 0.92rem;
  color: var(--muted);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.scenario-tile {
  min-height: 84px;
  padding: 12px;
  border: 1px solid rgba(13, 126, 162, 0.14);
  border-radius: 18px;
  background: #ffffff;
}

.scenario-tile strong {
  display: block;
  font-size: 0.9rem;
}

.scenario-tile span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.76rem;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.055);
  }
}

.desktop-qr {
  display: none;
}

.qr-card {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid rgba(7, 20, 38, 0.1);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.82);
  text-align: center;
}

.qr-card img {
  width: 170px;
  border-radius: 16px;
}

.qr-card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.notice {
  margin: 0 0 34px;
  padding: 18px 20px;
  border: 1px solid var(--warning-border);
  border-radius: 22px;
  background: var(--warning);
  color: #604817;
  font-weight: 650;
}

.section {
  padding: 54px 0;
}

.section h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.section-intro {
  max-width: 760px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.cards {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: 0 18px 48px rgba(7, 20, 38, 0.07);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.18rem;
  letter-spacing: -0.025em;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.feature-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 28px;
  color: var(--muted);
}

.feature-list li::before {
  content: "";
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.highlight-grid {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.highlight {
  border-radius: var(--radius);
  background: linear-gradient(145deg, #071426, #0a526f);
  color: #ffffff;
  padding: 26px;
  box-shadow: var(--shadow);
}

.highlight h3 {
  margin: 0 0 8px;
  font-size: 1.28rem;
}

.highlight p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
}

.safety-band {
  border-radius: 36px;
  background:
    linear-gradient(135deg, rgba(13, 126, 162, 0.95), rgba(22, 163, 166, 0.9)),
    var(--primary);
  color: #ffffff;
  padding: 34px;
  box-shadow: var(--shadow);
}

.safety-band h2 {
  color: #ffffff;
}

.safety-band .section-intro,
.safety-band li {
  color: rgba(255, 255, 255, 0.84);
}

.safety-band .feature-list li::before {
  background: #ffffff;
}

.footer {
  margin-top: 44px;
  padding: 30px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

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

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

.footer a {
  color: var(--primary-dark);
  font-weight: 750;
  text-decoration: none;
}

.policy-hero {
  padding: 64px 0 24px;
}

.policy-hero h1 {
  font-size: clamp(2.6rem, 7vw, 5rem);
}

.policy-content {
  display: grid;
  gap: 18px;
  max-width: 880px;
  padding: 24px 0 68px;
}

.policy-section {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: 0 16px 42px rgba(7, 20, 38, 0.06);
}

.policy-section h2 {
  margin: 0 0 10px;
  letter-spacing: -0.03em;
}

.policy-section p,
.policy-section li {
  color: var(--muted);
}

.policy-section p:last-child,
.policy-section ul:last-child {
  margin-bottom: 0;
}

@media (min-width: 760px) {
  .nav-links {
    display: flex;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.72fr);
  }

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

  .highlight-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .desktop-qr {
    display: block;
  }

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

@media (max-width: 520px) {
  .container,
  .nav {
    width: min(100% - 28px, 1120px);
  }

  .hero {
    padding-top: 46px;
  }

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

  .app-store-badge img {
    width: 165px;
  }

  .splash-preview {
    padding: 18px;
    min-height: auto;
  }

  .section {
    padding: 42px 0;
  }
}