:root {
  --bg: #f5f5f7;
  --bg-alt: #fbfbfd;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --line: rgba(29, 29, 31, 0.08);
  --line-strong: rgba(29, 29, 31, 0.14);
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #0071e3;
  --accent-soft: rgba(0, 113, 227, 0.12);
  --shadow: 0 28px 80px rgba(15, 17, 23, 0.08);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(0, 113, 227, 0.09), transparent 26%),
    radial-gradient(circle at 80% 16%, rgba(255, 255, 255, 0.72), transparent 18%),
    linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 46%, #eef1f5 100%);
}

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

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

code {
  font-family: "SF Mono", "SFMono-Regular", ui-monospace, Menlo, monospace;
  font-size: 0.92em;
}

.page-shell {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto;
  padding: 18px 0 72px;
}

.site-header {
  position: sticky;
  top: 14px;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
  box-shadow: 0 14px 40px rgba(15, 17, 23, 0.06);
}

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

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  box-shadow: 0 10px 24px rgba(15, 17, 23, 0.12);
}

.brand-text {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  gap: 24px;
  margin-left: auto;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.site-nav a:hover,
.nav-download:hover {
  color: var(--text);
}

.nav-download {
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--text);
  color: #fff;
  font-size: 0.94rem;
  font-weight: 700;
}

main {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

section {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, var(--surface-strong), var(--surface));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero {
  padding: 72px 34px 26px;
  text-align: center;
  background:
    radial-gradient(circle at top, rgba(0, 113, 227, 0.12), transparent 30%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(247, 248, 251, 0.76));
}

.hero-copy {
  display: grid;
  justify-items: center;
  gap: 18px;
  max-width: 760px;
  margin: 0 auto;
}

.eyebrow,
.card-step {
  margin: 0;
  color: var(--muted);
  font-size: 0.83rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-title,
.section-heading h2,
.cta-band h2 {
  margin: 0;
  letter-spacing: -0.05em;
}

.hero-title {
  max-width: 10ch;
  font-size: clamp(3.6rem, 8vw, 6.9rem);
  line-height: 0.92;
}

.hero-lead,
.hero-subline,
.section-copy,
.feature-card p,
.install-card p,
.showcase-card figcaption span,
.video-copy p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.hero-lead {
  max-width: 30ch;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
}

.hero-subline {
  max-width: 52ch;
  font-size: 0.98rem;
}

.hero-actions,
.video-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.96rem;
  font-weight: 700;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  border-color: transparent;
  background: var(--accent);
  color: #fff;
  box-shadow: 0 18px 42px rgba(0, 113, 227, 0.24);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
}

.button.ghost {
  background: rgba(255, 255, 255, 0.56);
  color: var(--text);
}

.hero-shot {
  width: min(1120px, 100%);
  margin: 34px auto 0;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.86);
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(245, 246, 249, 0.74));
  box-shadow:
    0 36px 90px rgba(15, 17, 23, 0.12),
    0 1px 0 rgba(255, 255, 255, 0.8) inset;
}

.hero-shot img {
  border-radius: 18px;
  box-shadow: 0 18px 40px rgba(15, 17, 23, 0.12);
}

.section-heading {
  display: grid;
  gap: 12px;
  padding: 34px 34px 0;
}

.section-heading h2,
.cta-band h2 {
  max-width: 12ch;
  font-size: clamp(2.2rem, 5vw, 4.3rem);
  line-height: 0.95;
}

.section-copy {
  max-width: 52ch;
  font-size: 1.02rem;
}

.showcase-grid,
.feature-grid,
.install-grid,
.video-layout,
.comparison-grid,
.faq-list {
  padding: 26px 34px 34px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr) minmax(260px, 0.72fr);
  gap: 18px;
  align-items: start;
}

.showcase-card,
.feature-card,
.install-card {
  height: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 16px 40px rgba(15, 17, 23, 0.06);
}

.showcase-card {
  padding: 14px;
}

.showcase-card img {
  border-radius: 18px;
}

.showcase-card figcaption {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  padding: 2px 6px 6px;
}

.showcase-card strong,
.feature-card h3,
.install-card h3 {
  letter-spacing: -0.02em;
}

.showcase-card strong {
  font-size: 1.05rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

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

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

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.feature-card,
.install-card {
  padding: 22px;
}

.comparison-card {
  height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top left, rgba(0, 113, 227, 0.08), transparent 44%),
    rgba(255, 255, 255, 0.74);
  box-shadow: 0 16px 40px rgba(15, 17, 23, 0.06);
}

.feature-card h3,
.install-card h3,
.comparison-card h3 {
  margin: 0 0 10px;
  font-size: 1.24rem;
}

.feature-card p,
.install-card p,
.comparison-card p,
.install-command {
  font-size: 0.98rem;
}

.quick-install .button.primary {
  justify-self: start;
}

.install-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 16px;
}

.install-card-main {
  background:
    radial-gradient(circle at top left, rgba(0, 113, 227, 0.1), transparent 45%),
    rgba(255, 255, 255, 0.86);
}

.install-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.install-command {
  overflow-wrap: anywhere;
}

.install-command code {
  display: block;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(245, 245, 247, 0.94);
}

.video-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 20px;
  align-items: center;
}

.video-copy {
  display: grid;
  gap: 18px;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 16px 40px rgba(15, 17, 23, 0.06);
}

.faq-item summary {
  cursor: pointer;
  padding: 22px 24px;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin: 0;
  padding: 0 24px 22px;
  color: var(--muted);
  line-height: 1.7;
}

.install-video {
  width: 100%;
  min-height: 320px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #000;
  box-shadow: 0 18px 42px rgba(15, 17, 23, 0.08);
}

.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 32px 34px;
  color: #fff;
  background:
    radial-gradient(circle at 18% 0%, rgba(82, 146, 255, 0.4), transparent 28%),
    linear-gradient(135deg, #0f1116, #1b1f2a);
}

.cta-band .eyebrow,
.cta-band h2 {
  color: #fff;
}

.cta-band .button.secondary,
.cta-band .button.ghost {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.14);
  color: #fff;
}

@media (max-width: 1120px) {
  .showcase-grid,
  .feature-grid,
  .recommend-grid,
  .privacy-grid,
  .install-grid,
  .video-layout,
  .comparison-grid {
    grid-template-columns: 1fr 1fr;
  }

  .showcase-card.showcase-portrait,
  .feature-grid article:last-child {
    grid-column: span 2;
  }
}

@media (max-width: 820px) {
  .page-shell {
    width: min(100%, calc(100% - 24px));
    padding-top: 12px;
  }

  .site-header {
    flex-wrap: wrap;
    justify-content: center;
    border-radius: 28px;
  }

  .site-nav {
    order: 3;
    width: 100%;
    justify-content: center;
    margin-left: 0;
    flex-wrap: wrap;
  }

  .hero {
    padding: 54px 20px 20px;
  }

  .hero-title {
    max-width: 8ch;
    font-size: clamp(2.9rem, 13vw, 4.6rem);
  }

  .section-heading,
  .showcase-grid,
  .feature-grid,
  .install-grid,
  .video-layout,
  .cta-band {
    padding-left: 20px;
    padding-right: 20px;
  }

  .showcase-grid,
  .feature-grid,
  .recommend-grid,
  .privacy-grid,
  .install-grid,
  .video-layout,
  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .showcase-card.showcase-portrait,
  .feature-grid article:last-child {
    grid-column: auto;
  }

  .cta-band {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-actions,
  .hero-actions,
  .video-actions {
    justify-content: flex-start;
  }

  .button {
    width: 100%;
  }
}