:root {
  --bg: #08090b;
  --bg-soft: #101215;
  --panel: rgba(18, 20, 24, 0.92);
  --panel-strong: #16181d;
  --text: #f5f3ee;
  --muted: #a8abb4;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 107, 0, 0.24);
  --red: #ff3a2e;
  --orange: #ff8a1f;
  --gold: #f5bf4a;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --radius: 24px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 58, 46, 0.18), transparent 28%),
    radial-gradient(circle at 90% 5%, rgba(245, 191, 74, 0.16), transparent 18%),
    linear-gradient(180deg, #050608 0%, #090a0d 46%, #0c0d11 100%);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  line-height: 1.7;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.8), transparent 85%);
  opacity: 0.4;
  z-index: 0;
}

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

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

.page-shell,
.site-header,
.section,
.site-footer {
  position: relative;
  z-index: 1;
}

.container {
  width: min(100% - 32px, var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(7, 8, 10, 0.72);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 80px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  box-shadow: 0 12px 28px rgba(255, 67, 45, 0.28);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text strong {
  letter-spacing: 0.08em;
  font-size: 1.06rem;
  text-transform: lowercase;
}

.brand-text small {
  color: var(--muted);
  margin-top: 4px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-nav a {
  padding: 11px 16px;
  border-radius: 999px;
  color: var(--muted);
  border: 1px solid transparent;
  transition: 0.22s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 0 10px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  margin: 4px auto;
  background: currentColor;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.section {
  padding: 88px 0;
}

.hero {
  padding-top: 60px;
}

.hero-grid,
.page-hero-inner,
.two-col,
.three-col {
  display: grid;
  gap: 28px;
}

.hero-grid {
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
}

.hero-copy h1,
.page-hero h1 {
  margin: 14px 0 18px;
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-size: clamp(2.1rem, 4vw, 4.65rem);
}

.lead {
  color: #d4d7de;
  font-size: 1.03rem;
  max-width: 66ch;
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--gold);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  transition: 0.24s ease;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.btn-primary {
  color: #120e06;
  background: linear-gradient(135deg, #ffd56c, #ff8a1f 54%, #ff4f34);
  box-shadow: 0 16px 36px rgba(255, 108, 29, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
}

.btn:hover {
  transform: translateY(-2px);
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.trust-row div {
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
}

.trust-row strong {
  display: block;
  font-size: 1.5rem;
  color: var(--gold);
}

.trust-row span {
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-panel,
.page-hero-card,
.info-card,
.feature-card,
.content-card,
.guide-step,
.review-card,
.shot-card,
.faq-item,
.download-panel {
  background: linear-gradient(180deg, rgba(26, 28, 33, 0.96), rgba(13, 15, 18, 0.96));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.device-card {
  padding: 20px;
  border-radius: calc(var(--radius) - 4px);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)),
    radial-gradient(circle at top right, rgba(255, 138, 31, 0.2), transparent 28%);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.device-top {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  margin-bottom: 18px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #3fe06f;
  box-shadow: 0 0 0 5px rgba(63, 224, 111, 0.16);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.metric {
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.metric span,
.info-card .card-tag,
.feature-icon,
.shot-card figcaption,
.guide-step span {
  color: var(--muted);
  font-size: 0.86rem;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 1.02rem;
}

.metric.wide {
  grid-column: 1 / -1;
}

.bar {
  height: 10px;
  margin-top: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.bar i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--gold), var(--orange), var(--red));
}

.mini-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.mini-card {
  padding: 15px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.mini-card em,
.feature-card h3,
.content-links strong,
.review-card footer {
  font-style: normal;
  font-weight: 700;
}

.mini-card p,
.info-card p,
.feature-card p,
.content-card p,
.guide-step p,
.review-card p,
.faq-item p,
.page-hero-card p,
.download-panel p {
  color: #ced2db;
}

.mini-card.highlight {
  border-color: rgba(255, 138, 31, 0.22);
  background: linear-gradient(180deg, rgba(255, 138, 31, 0.18), rgba(255,255,255,0.03));
}

.section-heading {
  display: grid;
  gap: 10px;
  margin-bottom: 24px;
  max-width: 820px;
}

.section-heading h2,
.content-card h2,
.guide-step h2,
.download-panel h2,
.page-hero-card strong {
  margin: 0;
  line-height: 1.15;
  font-size: clamp(1.5rem, 2.3vw, 2.45rem);
}

.stats-grid,
.feature-grid,
.shot-grid,
.content-links,
.review-grid,
.faq-grid,
.guide-grid {
  display: grid;
  gap: 20px;
}

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

.info-card,
.feature-card,
.guide-step,
.review-card,
.page-hero-card {
  padding: 24px;
}

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

.feature-icon {
  display: inline-flex;
  width: 52px;
  height: 52px;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  border-radius: 16px;
  border: 1px solid rgba(255, 138, 31, 0.2);
  background: linear-gradient(180deg, rgba(255, 138, 31, 0.18), rgba(255, 255, 255, 0.04));
  color: #ffd08b;
  font-weight: 800;
}

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

.shot-card {
  padding: 14px;
  overflow: hidden;
}

.shot-card img {
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.shot-card figcaption {
  margin-top: 12px;
}

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

.content-link {
  display: grid;
  gap: 10px;
  padding: 24px;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.02)),
    radial-gradient(circle at top right, rgba(255, 58, 46, 0.14), transparent 32%);
  border: 1px solid var(--line);
}

.content-link span {
  color: var(--gold);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

.review-card {
  margin: 0;
}

.review-card p {
  margin-top: 0;
  font-size: 1.02rem;
}

.review-card footer {
  color: var(--gold);
}

.faq-grid,
.faq-accordion {
  display: grid;
  gap: 16px;
}

.faq-item {
  padding: 0;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 22px;
  font-weight: 700;
  position: relative;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 18px;
  font-size: 1.2rem;
  color: var(--gold);
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-item p {
  margin: 0;
  padding: 0 22px 22px;
}

.page-hero-inner {
  grid-template-columns: 1.1fr 0.8fr;
  align-items: center;
}

.page-hero-card {
  align-self: stretch;
  display: grid;
  gap: 14px;
  align-content: center;
}

.two-col {
  grid-template-columns: 1.2fr 0.8fr;
}

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

.highlight-card {
  border-color: rgba(255, 138, 31, 0.2);
}

.check-list {
  margin: 0 0 24px;
  padding-left: 18px;
  color: #d7dae2;
}

.download-panel {
  padding: 28px;
  display: flex;
  gap: 24px;
  justify-content: space-between;
  align-items: center;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.28);
  padding: 30px 0 36px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 18px;
  align-items: start;
}

.footer-grid strong {
  display: inline-block;
  margin-bottom: 8px;
}

.footer-grid a {
  display: block;
  color: var(--muted);
  margin: 6px 0;
}

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

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.page-main {
  padding-top: 24px;
}

@media (max-width: 1024px) {
  .hero-grid,
  .page-hero-inner,
  .two-col,
  .three-col,
  .stats-grid,
  .feature-grid,
  .shot-grid,
  .content-links,
  .review-grid,
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .shot-grid,
  .content-links,
  .review-grid,
  .stats-grid,
  .feature-grid,
  .three-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .download-panel {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 760px) {
  .menu-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 16px;
    right: 16px;
    display: grid;
    gap: 6px;
    padding: 12px;
    border-radius: 18px;
    background: rgba(8, 9, 11, 0.96);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: 0.22s ease;
  }

  .site-nav.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .header-inner {
    position: relative;
  }

  .section {
    padding: 68px 0;
  }

  .hero-grid,
  .page-hero-inner,
  .two-col,
  .three-col,
  .stats-grid,
  .feature-grid,
  .shot-grid,
  .content-links,
  .review-grid,
  .footer-grid,
  .trust-row,
  .metric-grid,
  .mini-cards {
    grid-template-columns: 1fr;
  }

  .download-panel,
  .hero-actions,
  .download-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }
}