:root {
  --primary: #F5A623;
  --primary-dark: #D4880E;
  --primary-light: #FCEABB;
  --secondary: #2D2D2D;
  --accent: #FF6B35;
}

/* 暗黑沉浸影音风 · 玻璃拟态 */
html { scroll-behavior: smooth; }
body { -webkit-font-smoothing: antialiased; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: #100e1a; }
::-webkit-scrollbar-thumb { background: linear-gradient(#818cf8, #c084fc); border-radius: 8px; }
::selection { background: #818cf8; color: #fff; }

/* 玻璃卡片 */
.glass {
  background: rgba(255,255,255,.05);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.09);
  transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease;
}
.glass:hover {
  transform: translateY(-5px);
  border-color: rgba(129,140,248,.5);
  box-shadow: 0 16px 44px -12px rgba(129,140,248,.4);
}

/* 光晕 */
.aurora {
  position: absolute; border-radius: 9999px;
  filter: blur(90px); opacity: .5; z-index: 0;
}

/* 渐变文字 */
.gradient-text {
  background: linear-gradient(110deg, #a5b4fc, #c084fc, #38bdf8);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* 图片缩放 */
.zoom-img { overflow: hidden; }
.zoom-img img { transition: transform .6s cubic-bezier(.16,.84,.44,1); }
.zoom-img:hover img { transform: scale(1.07); }

/* 移动端抽屉导航 */
.nav { transition: transform .4s cubic-bezier(.16,.84,.44,1); }
@media (max-width: 1023px) {
  .nav {
    position: fixed; top: 0; right: 0; bottom: 0;
    width: 84%; max-width: 340px;
    flex-direction: column; align-items: flex-start;
    background: #14121f; padding: 5.5rem 1.5rem 2rem;
    transform: translateX(100%);
    z-index: 60; overflow-y: auto; gap: .35rem;
    display: flex !important;
  }
  .nav.active { transform: translateX(0); }
  .nav a { width: 100%; }
  .menu-overlay {
    position: fixed; inset: 0;
    background: rgba(16,14,26,.8); backdrop-filter: blur(4px);
    opacity: 0; visibility: hidden;
    transition: opacity .35s ease; z-index: 55;
  }
  .menu-overlay.active { opacity: 1; visibility: visible; }
  body.menu-open { overflow: hidden; }
}

/* FAQ 折叠 */
.faq-answer {
  max-height: 0; overflow: hidden; opacity: 0;
  transition: max-height .4s ease, opacity .4s ease;
}
.faq-icon { transition: transform .35s ease; }

/* 回到顶部 */
.back-to-top { opacity: 0; visibility: hidden; transition: opacity .35s ease; }
.back-to-top.visible { opacity: 1; visibility: visible; }

/* 入场动画 */
@keyframes glowUp {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}
.glow-up { animation: glowUp .85s cubic-bezier(.16,.84,.44,1) both; }

@media print {
  header, footer, .nav, .no-print { display: none !important; }
  body { background: #fff !important; color: #000 !important; }
}