:root {
  --bg: #111111;
  --band: #1c1c1c;
  --orange: #ff6a00;
  --text: #f2f2f2;
  --dim: #bdbdbd;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "DIN Alternate", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 17px;
  line-height: 1.8;
}
a { color: var(--orange); }
a:hover { color: #ffb27a; }

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 6vw;
  border-bottom: 1px solid #2a2a2a;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.14em;
}
.nav a {
  color: var(--dim);
  text-decoration: none;
  margin-left: 28px;
  font-size: 15px;
}
.nav a.is-current { color: var(--orange); }

.hero {
  padding: 56px 6vw 48px;
  background: linear-gradient(180deg, #1a120c 0%, #111 100%);
}
.hero h1 {
  font-size: 40px;
  line-height: 1.28;
  max-width: 16em;
  margin-bottom: 18px;
}
.hero p { max-width: 42em; color: var(--dim); margin-bottom: 26px; }
.btn-dl {
  display: inline-block;
  background: var(--orange);
  color: #111;
  text-decoration: none;
  padding: 14px 28px;
  font-weight: 800;
}
.btn-dl:hover { background: #ff8a33; color: #111; }

.band {
  padding: 48px 6vw;
}
.band:nth-of-type(odd) { background: var(--band); }
.band:nth-of-type(even) { background: #161616; }
.band h2 {
  font-size: 28px;
  color: var(--orange);
  margin-bottom: 16px;
  font-weight: 700;
}
.band p { margin-bottom: 14px; max-width: 70em; }
.q-display {
  font-size: 22px;
  color: #fff;
  margin-bottom: 10px;
}
.faq-item { margin-bottom: 22px; max-width: 70em; }
.faq-item h3 { font-size: 20px; color: #fff; margin-bottom: 8px; }

.site-footer {
  padding: 32px 6vw 48px;
  border-top: 1px solid #2a2a2a;
  color: #9a9a9a;
  font-size: 13px;
}
.foot-nav a { color: var(--orange); margin-right: 18px; text-decoration: none; }
.site-footer p { margin: 8px 0; }

@media (max-width: 720px) {
  .hero h1 { font-size: 28px; }
  .top { flex-direction: column; align-items: flex-start; gap: 12px; }
  .nav a { margin-left: 0; margin-right: 16px; }
}