/* 浅沙日间 */
.theme-sand {
  --bg: #ece8e1;
  --bg-elev: #f7f4ee;
  --bg-soft: #e4dfd6;
  --ink: #1c2430;
  --muted: #5f6b78;
  --line: rgba(28, 36, 48, 0.1);
  --line-strong: rgba(28, 36, 48, 0.18);
  --accent: #1f4b7a;
  --accent-2: #2f6dad;
  --accent-ink: #f4f7fb;
  --font-display: "Literata", serif;
  --font-body: "Work Sans", sans-serif;
}
.theme-sand .page-atmosphere {
  background:
    radial-gradient(800px 400px at 20% 0%, rgba(31,75,122,0.08), transparent 55%),
    linear-gradient(180deg, #f3efe8, #ece8e1 50%, #e6e1d8);
}
.theme-sand .page-atmosphere::after { opacity: 0.02; }
.theme-sand .site-header {
  background: rgba(247, 244, 238, 0.86);
  border-bottom-color: rgba(28,36,48,0.08);
}
.theme-sand .masthead-brand {
  background: linear-gradient(100deg, #1c2430, #1f4b7a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.theme-sand .btn-primary {
  background: linear-gradient(135deg, #2f6dad, #1f4b7a);
  color: #fff;
}
.theme-sand .link-vip {
  background: #1f4b7a;
  color: #fff;
}
.theme-sand .badge.free { background: #2f7d57; color: #fff; }
.theme-sand .poster-veil {
  background: linear-gradient(180deg, transparent 50%, rgba(20,24,30,0.45) 100%);
}
.theme-sand .site-footer { color: var(--muted); border-top-color: rgba(28,36,48,0.1); }
.theme-sand .search-form { background: #fff; }
.theme-sand .auth-card { background: #fff; box-shadow: 0 20px 50px rgba(28,36,48,0.08); }