:root {
  color-scheme: dark;
  --blue: #3b63ff;
  --cyan: #25d0df;
  --ink: #f8fbff;
  --muted: #aab6ca;
  --line: rgba(255,255,255,.12);
  --panel: rgba(255,255,255,.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 18%, rgba(37,208,223,.22), transparent 28%),
    radial-gradient(circle at 80% 12%, rgba(59,99,255,.24), transparent 30%),
    linear-gradient(180deg, #101828 0%, #07111f 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1120px, calc(100% - 32px));
  height: 76px;
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 900; }
.brand img { width: 48px; height: 48px; object-fit: cover; border-radius: 12px; box-shadow: 0 14px 28px rgba(0,0,0,.28); }
.brand small { display: block; margin-top: -5px; color: var(--muted); font-size: 10px; letter-spacing: .36em; font-weight: 800; }
.site-nav { display: flex; align-items: center; gap: 24px; color: #d7e1f5; font-size: 15px; font-weight: 800; }
.site-nav a:hover { color: var(--cyan); }

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 56px;
  width: min(1120px, calc(100% - 32px));
  min-height: calc(100vh - 76px);
  margin: 0 auto;
  padding: 58px 0 78px;
}
.eyebrow {
  display: inline-flex;
  margin: 0 0 18px;
  padding: 6px 12px;
  color: #92f2ff;
  background: rgba(37,208,223,.12);
  border: 1px solid rgba(37,208,223,.26);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
}
.hero h1 { margin: 0; font-size: clamp(46px, 7vw, 84px); line-height: 1; letter-spacing: 0; }
.lead { max-width: 560px; margin: 24px 0 0; color: var(--muted); font-size: 19px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 36px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 900;
}
.button.primary { color: #fff; background: linear-gradient(135deg, var(--blue), var(--cyan)); box-shadow: 0 18px 44px rgba(37,208,223,.22); }
.button.secondary { color: #eaf2ff; background: rgba(255,255,255,.08); border-color: var(--line); }
.meta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.meta-row span {
  padding: 7px 10px;
  color: #dbe7ff;
  background: rgba(255,255,255,.08);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}
.game-card {
  padding: 12px;
  background: linear-gradient(135deg, rgba(255,255,255,.18), rgba(255,255,255,.04));
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 34px 80px rgba(0,0,0,.34);
}
.game-card img { width: 100%; border-radius: 20px; }

.section {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0;
}
.download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.download-card {
  display: grid;
  gap: 12px;
  padding: 26px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
}
.download-card.featured { border-color: rgba(37,208,223,.38); box-shadow: 0 24px 64px rgba(37,208,223,.14); }
.download-card span { color: #92f2ff; font-size: 13px; font-weight: 900; text-transform: uppercase; letter-spacing: .12em; }
.download-card h3 { margin: 0; font-size: 28px; }
.download-card p, .notice p, .steps p { margin: 0; color: var(--muted); }
.download-card strong { color: #fff; font-size: 15px; }
.download-card .button { width: fit-content; margin-top: 6px; }
.notice h2 { margin: 0 0 6px; font-size: 28px; }
.section-heading { text-align: center; margin-bottom: 26px; }
.section-heading h2 { margin: 0; font-size: 32px; }
.section-heading p { margin: 8px 0 0; color: var(--muted); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.steps article {
  min-height: 178px;
  padding: 24px;
  background: rgba(255,255,255,.07);
  border: 1px solid var(--line);
  border-radius: 16px;
}
.steps strong { color: var(--cyan); font-size: 24px; }
.steps h3 { margin: 10px 0 8px; font-size: 21px; }
.notice {
  margin-bottom: 20px;
  padding: 28px;
  background: rgba(37,208,223,.08);
  border: 1px solid rgba(37,208,223,.2);
  border-radius: 18px;
}
.notice a { display: inline-flex; margin-top: 14px; color: #94f2ff; font-weight: 900; }
.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
  color: var(--muted);
}

@media (max-width: 820px) {
  .site-header { height: auto; padding: 14px 0; align-items: flex-start; }
  .site-nav { flex-wrap: wrap; justify-content: flex-end; gap: 10px 16px; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 44px; }
  .site-footer { flex-direction: column; align-items: flex-start; }
  .download-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .brand span { font-size: 17px; }
  .site-nav { display: none; }
  .hero h1 { font-size: 44px; }
  .hero-actions .button, .download-card .button { width: 100%; }
}