:root {
  --bg: #fff;
  --ink: #111;
  --mute: #666;
  --line: #eee;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}
img { max-width:100%;height:auto; display: block; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(920px, calc(100% - 40px)); margin-inline: auto; }
nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #fff;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 56px;
}
.brand { font-weight: 600; }
.links { display: flex; gap: 18px; font-size: 0.88rem; color: var(--mute); }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 4px;
}
.ghost { padding: 8px 12px; color: var(--mute); }
.hero { padding: 96px 0 48px; }
.hero h1, .page-head h1 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 550;
  line-height: 1.3;
}
.lead { color: var(--mute); margin: 12px 0 16px; }
.hero .button { margin-top: 20px; }
.section { padding: 72px 0; }
.head { margin-bottom: 24px; max-width: 36em; }
.grid6, .cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card, .download-card, .review, .scene, .policy { padding: 0; }
.icon { color: var(--mute); font-size: 0.75rem; margin-bottom: 6px; }
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}
.split img, .shot img, .cta img {
  width: 100%;
  object-fit: cover;
}
.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 16px 0 18px;
}
.scene { display: flex; gap: 8px; }
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.person { margin-top: 10px; color: var(--mute); display: flex; flex-direction: column; }
.visual { padding: 0 0 72px; }
.faq-layout {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 28px;
}
details { border-bottom: 1px solid var(--line); padding: 12px 0; }
summary { cursor: pointer; font-weight: 600; }
details p { margin-top: 8px; color: var(--mute); }
.cta { padding: 20px 0 72px; }
.cta img { height: 160px; object-fit: cover; margin-bottom: 16px; }
footer {
  padding: 28px 0 16px;
  border-top: 1px solid var(--line);
  color: var(--mute);
}
.footer {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.footer .brand { color: var(--ink); }
.footer h4 { color: #999; font-weight: 500; margin-bottom: 8px; }
.footer a { display: block; margin: 6px 0; }
.seo-line {
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: #9a9a9a;
  padding: 8px 0 12px;
}
.copy { font-size: 0.78rem; }
.page-head { padding: 48px 0 8px; }
.help-layout {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
}
.side a { display: block; padding: 8px 0; color: var(--mute); }
.article { margin-bottom: 32px; }
.article .shot { margin: 14px 0; }
.policy { margin-top: 14px; }
@media (max-width: 900px) {
  .grid6, .cards, .review-grid, .split, .faq-layout, .footer, .help-layout {
    grid-template-columns: 1fr;
  }
  .links { display: none; }
}
@media (max-width: 640px) {
  .scene-grid { grid-template-columns: 1fr; }
}

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