/* ================================================================
 * lanshu-awesome-ai-video-kit · 全站统一主题(Liquid Glass)
 * 与主页 index.html 完全一致的视觉系统:
 *   - CSS variables (dark/light tokens)
 *   - Mesh gradient background + noise overlay
 *   - Floating capsule nav (.top + .nav-link + .nav-icon-btn)
 *   - Theme toggle via [data-theme="light"]
 * 配套 JS: /assets/site-theme.js
 * ================================================================ */

:root {
  --bg-base: #06050b;
  --bg-mesh-1: hsl(258, 75%, 22%);
  --bg-mesh-2: hsl(330, 75%, 20%);
  --bg-mesh-3: hsl(195, 65%, 18%);
  --bg-mesh-4: hsl(48, 70%, 18%);

  /* Liquid Glass surfaces */
  --glass-1: rgba(255, 255, 255, 0.03);
  --glass-2: rgba(255, 255, 255, 0.05);
  --glass-3: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-strong: rgba(255, 255, 255, 0.14);
  --glass-highlight: rgba(255, 255, 255, 0.12);

  /* Text */
  --text-primary: rgba(255, 255, 255, 0.98);
  --text-secondary: rgba(255, 255, 255, 0.66);
  --text-muted: rgba(255, 255, 255, 0.42);
  --text-disabled: rgba(255, 255, 255, 0.24);

  /* Accent */
  --accent: #a78bfa;
  --accent-hover: #c4b5fd;
  --accent-soft: rgba(167, 139, 250, 0.15);
  --accent-glow: rgba(167, 139, 250, 0.5);

  /* 15 模型色 */
  --m-sd: #fb923c; --m-hh: #38bdf8; --m-kl: #f472b6;
  --m-so: #34d399; --m-ve: #facc15; --m-rw: #c084fc;
  --m-pk: #fda4af; --m-hl: #5eead4; --m-hy: #93c5fd;
  --m-wn: #fcd34d; --m-jm: #f9a8d4;
  --m-lt: #a3e635; --m-mo: #fb7185; --m-cg: #60a5fa; --m-hg: #e879f9;

  /* Radius */
  --r-sm: 8px; --r-md: 14px; --r-lg: 22px; --r-xl: 32px; --r-full: 999px;

  /* Liquid Glass shadows */
  --shadow-glass:
    inset 0 1px 0 rgba(255, 255, 255, 0.14),
    inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    0 1px 2px rgba(0, 0, 0, 0.2),
    0 8px 24px rgba(0, 0, 0, 0.3),
    0 24px 64px -8px rgba(0, 0, 0, 0.4);
  --shadow-glass-hover:
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    0 16px 40px rgba(0, 0, 0, 0.4),
    0 40px 100px -16px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
  --bg-base: #f5f3ff;
  --bg-mesh-1: hsl(258, 90%, 88%);
  --bg-mesh-2: hsl(330, 85%, 92%);
  --bg-mesh-3: hsl(195, 75%, 90%);
  --bg-mesh-4: hsl(48, 90%, 92%);
  --glass-1: rgba(255, 255, 255, 0.45);
  --glass-2: rgba(255, 255, 255, 0.65);
  --glass-3: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.06);
  --glass-border-strong: rgba(0, 0, 0, 0.12);
  --glass-highlight: rgba(255, 255, 255, 0.9);
  --text-primary: rgba(15, 12, 25, 0.92);
  --text-secondary: rgba(15, 12, 25, 0.6);
  --text-muted: rgba(15, 12, 25, 0.4);
  --text-disabled: rgba(15, 12, 25, 0.25);
  --accent: #7c3aed;
  --accent-hover: #6d28d9;
  --accent-soft: rgba(124, 58, 237, 0.12);
  --accent-glow: rgba(124, 58, 237, 0.35);
  --shadow-glass:
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 0 0 1px rgba(255, 255, 255, 0.4),
    0 1px 2px rgba(0, 0, 0, 0.04),
    0 8px 24px rgba(0, 0, 0, 0.08),
    0 24px 64px -8px rgba(0, 0, 0, 0.12);
  --shadow-glass-hover:
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 0 0 0 1px rgba(255, 255, 255, 0.6),
    0 16px 40px rgba(0, 0, 0, 0.15),
    0 40px 100px -16px rgba(0, 0, 0, 0.2);
}

html, body {
  font-family: 'Inter', system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11', 'ss01';
  overflow-x: hidden;
}
body { min-height: 100vh; position: relative; }

/* ============= Animated mesh background ============= */
body::before {
  content: '';
  position: fixed;
  inset: -10vh -10vw;
  background:
    radial-gradient(45% 55% at 12% 8%, var(--bg-mesh-1) 0%, transparent 60%),
    radial-gradient(40% 50% at 88% 4%, var(--bg-mesh-2) 0%, transparent 55%),
    radial-gradient(55% 45% at 50% 100%, var(--bg-mesh-3) 0%, transparent 60%),
    radial-gradient(40% 40% at 80% 70%, var(--bg-mesh-4) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
  animation: meshDrift 30s ease-in-out infinite alternate;
}
@keyframes meshDrift {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-2%, -1%) scale(1.05); }
  100% { transform: translate(2%, 1%) scale(1); }
}
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.9'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.06 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  mix-blend-mode: overlay;
}

/* ============= Floating capsule nav ============= */
nav.top {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 8px 6px 16px;
  background: var(--glass-2);
  backdrop-filter: saturate(180%) blur(28px);
  -webkit-backdrop-filter: saturate(180%) blur(28px);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-full);
  box-shadow: var(--shadow-glass);
  max-width: calc(100vw - 32px);
  overflow-x: auto;
  scrollbar-width: none;
}
nav.top::-webkit-scrollbar { display: none; }

nav.top .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 13px;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
  padding-right: 12px;
  border-right: 1px solid var(--glass-border);
  margin-right: 4px;
  white-space: nowrap;
  transition: opacity .15s;
}
nav.top .brand:hover { opacity: 0.78; }
nav.top .brand-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, #a78bfa, #f472b6);
  box-shadow: 0 0 12px var(--accent-glow);
  animation: brandPulse 2.4s ease-in-out infinite;
}
@keyframes brandPulse {
  0%, 100% { box-shadow: 0 0 8px var(--accent-glow); transform: scale(1); }
  50% { box-shadow: 0 0 16px var(--accent-glow), 0 0 24px var(--accent-glow); transform: scale(1.15); }
}

nav.top .nav-link {
  padding: 7px 13px;
  border-radius: var(--r-full);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 12.5px;
  font-weight: 500;
  transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}
nav.top .nav-link:hover {
  color: var(--text-primary);
  background: var(--glass-3);
}
nav.top .nav-link.active {
  color: var(--text-primary);
  background: var(--accent-soft);
  font-weight: 600;
}
nav.top .nav-link.cta {
  background: var(--accent);
  color: #fff;
  margin-left: 4px;
  box-shadow: 0 0 16px var(--accent-glow);
}
nav.top .nav-link.cta:hover {
  background: var(--accent-hover);
  color: #fff;
}

nav.top .nav-icon-btn {
  width: 30px;
  height: 30px;
  border-radius: var(--r-full);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s;
}
nav.top .nav-icon-btn:hover {
  background: var(--glass-3);
  color: var(--text-primary);
}
nav.top .nav-icon-btn svg { width: 14px; height: 14px; }

@media (max-width: 740px) {
  nav.top { padding: 4px 6px 4px 12px; gap: 2px; }
  nav.top .brand { padding-right: 8px; margin-right: 2px; font-size: 12px; }
  nav.top .nav-link { padding: 6px 10px; font-size: 11.5px; }
}