* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #000;
  background: #fff;
  line-height: 1.6;
}
img { max-width:100%;height:auto; display: block; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(1080px, calc(100% - 40px)); margin-inline: auto; }
nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #000;
  color: #fff;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 58px;
}
.brand { font-weight: 800; }
.links { display: flex; gap: 18px; font-size: 0.9rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: #000;
  font-weight: 800;
  padding: 10px 16px;
  border: 2px solid #fff;
}
.button.invert {
  background: #000;
  color: #fff;
  border-color: #000;
}
.hero .button.invert,
.cta .button.invert {
  background: #fff;
  color: #000;
  border-color: #fff;
}
.ghost { padding: 10px 14px; border: 2px solid #000; }
.hero {
  background: #000;
  color: #fff;
  padding: 72px 0;
}
.kicker {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 800;
  margin-bottom: 12px;
}
.hero h1, .page-head h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.1;
}
.lead { margin: 12px 0 14px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.band { background: #000; padding: 0 0 48px; }
.band img { width: 100%; height: 280px; object-fit: cover; filter: grayscale(1) contrast(1.2); }
.section { padding: 80px 0; }
.head { margin-bottom: 26px; max-width: 38em; }
.grid6, .cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}
.card, .download-card, .review, .scene, .policy {
  border: 2px solid #000;
  padding: 18px;
  margin: -1px;
  background: #fff;
}
.card.flip, .download-card.flip {
  background: #000;
  color: #fff;
}
.icon { font-weight: 800; margin-bottom: 6px; }
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: center;
}
.split img, .shot img {
  width: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.15);
  border: 2px solid #000;
}
.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: 16px 0 18px;
}
.scene { display: flex; gap: 8px; }
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}
.person { margin-top: 12px; display: flex; flex-direction: column; font-weight: 700; }
.visual { padding: 0 0 80px; }
.metrics { display: flex; gap: 22px; margin: 16px 0; }
.metrics b { display: block; font-size: 1.4rem; }
.faq-layout {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 28px;
}
details { border-bottom: 2px solid #000; padding: 12px 0; }
summary { cursor: pointer; font-weight: 800; }
details p { margin-top: 8px; }
.cta {
  background: #000;
  color: #fff;
  padding: 40px 0;
}
.cta-in {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}
footer {
  background: #000;
  color: #fff;
  padding: 36px 0 18px;
  border-top: 2px solid #fff;
}
.footer {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.footer h4 { margin-bottom: 8px; }
.footer a { display: block; margin: 6px 0; }
.copy { border-top: 2px solid #fff; padding-top: 12px; font-size: 0.82rem; }
.page-head { padding: 48px 0 10px; }
.help-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 28px;
}
.side a { display: block; padding: 8px 0; border-bottom: 2px solid #000; }
.article { margin-bottom: 36px; }
.article .shot { margin: 14px 0; }
.policy { margin-top: 14px; }
@media (max-width: 900px) {
  .grid6, .cards, .review-grid, .split, .faq-layout, .footer, .help-layout, .cta-in {
    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}}