:root {
  color-scheme: dark;
  --bg: #050b18;
  --panel: rgba(9, 23, 45, 0.78);
  --panel-strong: rgba(12, 27, 51, 0.94);
  --line: rgba(126, 180, 255, 0.2);
  --text: #f6fbff;
  --muted: #a8b8d4;
  --cyan: #25d7ff;
  --pet: #ff9a57;
  --pink: #ff6f9f;
  --radius: 8px;
  --container: min(1120px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 14% 8%, rgba(255, 154, 87, 0.18), transparent 28%),
    radial-gradient(circle at 82% 10%, rgba(37, 215, 255, 0.13), transparent 32%),
    linear-gradient(180deg, #050b18 0%, #081427 52%, #050b18 100%);
  line-height: 1.75;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.28));
}

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

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

.container {
  width: var(--container);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(126, 180, 255, 0.16);
  background: rgba(5, 11, 24, 0.84);
  backdrop-filter: blur(18px);
}

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

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

.brand img {
  width: 46px;
  height: 46px;
  object-fit: contain;
  filter: drop-shadow(0 0 16px rgba(37, 215, 255, 0.34));
}

.brand-name {
  display: block;
  font-size: 22px;
  font-weight: 850;
  line-height: 1.1;
}

.brand-company {
  display: block;
  margin-top: 4px;
  color: #87a4cc;
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: #c8d6ee;
  font-size: 15px;
}

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

.hero {
  padding: 90px 0 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: 42px;
  align-items: center;
}

.app-head {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 22px;
}

.app-icon {
  width: 92px;
  height: 92px;
  border-radius: 24px;
  object-fit: cover;
  box-shadow: 0 18px 46px rgba(255, 154, 87, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.14);
}

.tag {
  display: inline-flex;
  width: fit-content;
  padding: 5px 10px;
  border: 1px solid rgba(255, 154, 87, 0.36);
  border-radius: 999px;
  color: #ffd8bf;
  background: rgba(255, 154, 87, 0.1);
  font-size: 12px;
  font-weight: 750;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.18;
  letter-spacing: 0;
}

h1 {
  margin-top: 8px;
  font-size: clamp(42px, 7vw, 76px);
}

.lead {
  width: min(650px, 100%);
  margin: 22px 0 0;
  color: #c7d6ee;
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border: 1px solid rgba(178, 211, 255, 0.36);
  border-radius: var(--radius);
  font-weight: 800;
}

.btn-primary {
  color: #190b05;
  border: 0;
  background: linear-gradient(90deg, #ffd36a, var(--pet) 54%, var(--pink));
  box-shadow: 0 18px 44px rgba(255, 154, 87, 0.24);
}

.btn-secondary {
  color: #ecf7ff;
  background: rgba(7, 19, 36, 0.58);
}

.phone {
  width: min(320px, 100%);
  margin: 0 auto;
  padding: 18px;
  border-radius: 32px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: linear-gradient(180deg, #fff7ef, #fff);
  color: #42362f;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.34);
}

.phone-top {
  display: flex;
  justify-content: space-between;
  color: #9a8173;
  font-size: 12px;
  margin-bottom: 18px;
}

.pet-card {
  padding: 17px;
  border-radius: 22px;
  background: linear-gradient(135deg, #fff2e6, #fff);
  box-shadow: 0 12px 34px rgba(255, 138, 61, 0.14);
}

.pet-card img {
  width: 76px;
  height: 76px;
  border-radius: 19px;
  object-fit: cover;
  margin-bottom: 14px;
}

.pet-card strong {
  display: block;
  font-size: 22px;
  line-height: 1.35;
}

.pet-card span {
  display: block;
  margin-top: 8px;
  color: #8d7467;
  font-size: 14px;
}

.phone-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.phone-item {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 12px;
  border-radius: 16px;
  background: #fffaf5;
  color: #5d4a40;
  font-size: 13px;
}

.section {
  padding: 66px 0;
  border-top: 1px solid rgba(126, 180, 255, 0.1);
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 28px;
}

.section-kicker {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section h2 {
  margin-top: 6px;
  font-size: clamp(28px, 3.4vw, 44px);
}

.section-lead {
  width: min(480px, 100%);
  margin: 0;
  color: var(--muted);
}

.feature-grid,
.download-grid,
.legal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.card strong {
  display: block;
  color: #fff;
  font-size: 19px;
  margin-bottom: 8px;
}

.card p,
.card span,
.doc p,
.doc li {
  color: var(--muted);
}

.download-card {
  display: block;
  padding: 24px;
  border: 1px solid rgba(126, 180, 255, 0.2);
  border-radius: var(--radius);
  background: var(--panel-strong);
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.download-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 154, 87, 0.48);
}

.download-card.is-open {
  border-color: rgba(255, 154, 87, 0.46);
  background:
    radial-gradient(circle at 12% 0%, rgba(255, 154, 87, 0.16), transparent 34%),
    var(--panel-strong);
}

.download-card.is-soon {
  opacity: 0.74;
}

.download-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 21px;
}

.download-card span {
  color: var(--muted);
}

.doc {
  width: min(900px, calc(100% - 40px));
  margin: 64px auto;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.doc h1 {
  font-size: clamp(34px, 5vw, 54px);
}

.doc h2 {
  margin-top: 34px;
  font-size: 24px;
}

.doc ul,
.doc ol {
  padding-left: 20px;
}

.meta {
  margin: 12px 0 28px;
  color: #8fa4c7;
}

.site-footer {
  padding: 36px 0;
  border-top: 1px solid rgba(126, 180, 255, 0.12);
  color: #8fa4c7;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  .hero-grid,
  .feature-grid,
  .download-grid,
  .legal-grid {
    grid-template-columns: 1fr;
  }

  .section-head {
    display: block;
  }

  .section-lead {
    margin-top: 12px;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 30px, 1120px);
  }

  .nav {
    min-height: 68px;
  }

  .brand-company,
  .nav-links {
    display: none;
  }

  .hero {
    padding: 54px 0 44px;
  }

  .app-head {
    align-items: flex-start;
  }

  .app-icon {
    width: 74px;
    height: 74px;
    border-radius: 20px;
  }

  .actions,
  .btn {
    width: 100%;
  }

  .doc {
    margin: 34px auto;
    padding: 24px;
  }
}