/* ═══════════════════════════════════════════════════════════════
   VUC Design Tokens v1.0 — 虚拟宇宙公司 全局设计变量
   所有子页面引入此文件即可获得与首页一致的视觉风格
   ═══════════════════════════════════════════════════════════════ */

:root {
  /* === 底色板 === */
  --vuc-bg:           #0a0a1a;        /* 深空主背景 */
  --vuc-bg-deep:      #050510;        /* 更深区域背景 */
  --vuc-bg-panel:     rgba(16,16,32,0.85);
  --vuc-bg-card:      rgba(18,18,36,0.8);

  /* === 前景文字 === */
  --vuc-fg:           #e8e8f0;        /* 主文字 */
  --vuc-fg-dim:       rgba(232,232,240,0.65);
  --vuc-fg-muted:     rgba(232,232,240,0.4);
  --vuc-fg-title:     #ffffff;

  /* === 主题强调色 === */
  --vuc-green:        #00ff88;        /* 主强调：生命/科技/CTA */
  --vuc-cyan:         #6ca0dc;        /* 次强调：医疗/信息 */
  --vuc-purple:       #7b5cff;        /* 第三强调：科技/精神 */
  --vuc-gold:         #c9a84c;        /* 金融/价值/成就 */
  --vuc-pink:         #ff6b9d;        /* 警告/紧急/特殊 */
  --vuc-red:          #ff4d4d;        /* 危险/错误 */

  /* === 玻璃态 === */
  --vuc-glass-bg:     rgba(16,16,32,0.85);
  --vuc-glass-border: rgba(0,255,136,0.15);
  --vuc-glass-glow:   rgba(0,255,136,0.1);
  --vuc-glass-blur:   12px;

  /* === 圆角 === */
  --vuc-radius-sm:    8px;
  --vuc-radius-md:    12px;
  --vuc-radius-lg:    16px;
  --vuc-radius-xl:    24px;

  /* === 间距 === */
  --vuc-space-xs:     4px;
  --vuc-space-sm:     8px;
  --vuc-space-md:     16px;
  --vuc-space-lg:     24px;
  --vuc-space-xl:     40px;
  --vuc-space-2xl:    64px;

  /* === 排版 === */
  --vuc-font:          'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --vuc-font-mono:     'Orbitron', 'Courier New', monospace;

  /* === 阴影 === */
  --vuc-shadow-sm:     0 2px 8px rgba(0,0,0,0.3);
  --vuc-shadow-md:     0 4px 16px rgba(0,0,0,0.4);
  --vuc-shadow-lg:     0 8px 32px rgba(0,0,0,0.5);
  --vuc-shadow-glow:   0 0 20px var(--vuc-glass-glow);

  /* === 动画 === */
  --vuc-transition:    0.3s cubic-bezier(0.4,0,0.2,1);
}

/* === 全局 Reset === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--vuc-font);
  color: var(--vuc-fg);
  background: var(--vuc-bg);
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(0,255,136,0.06), transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(123,92,255,0.05), transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(108,160,220,0.03), transparent 60%),
    var(--vuc-bg);
}

/* === 通用卡片 === */
.vuc-card {
  background: var(--vuc-glass-bg);
  border: 1px solid var(--vuc-glass-border);
  border-radius: var(--vuc-radius-lg);
  backdrop-filter: blur(var(--vuc-glass-blur));
  -webkit-backdrop-filter: blur(var(--vuc-glass-blur));
  padding: var(--vuc-space-lg);
  transition: transform var(--vuc-transition), box-shadow var(--vuc-transition), border-color var(--vuc-transition);
}
.vuc-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--vuc-shadow-glow);
  border-color: rgba(0,255,136,0.3);
}

/* === 通用按钮 === */
.vuc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: var(--vuc-radius-sm);
  font-family: var(--vuc-font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--vuc-transition);
  border: none;
  text-decoration: none;
  line-height: 1.4;
}
.vuc-btn--primary {
  background: linear-gradient(135deg, var(--vuc-green), var(--vuc-cyan));
  color: #0a0a1a;
  box-shadow: 0 0 16px rgba(0,255,136,0.25);
}
.vuc-btn--primary:hover {
  box-shadow: 0 0 28px rgba(0,255,136,0.45);
  transform: translateY(-1px);
}
.vuc-btn--secondary {
  background: transparent;
  border: 1px solid var(--vuc-glass-border);
  color: var(--vuc-fg);
}
.vuc-btn--secondary:hover {
  border-color: var(--vuc-green);
  background: rgba(0,255,136,0.08);
}

/* === 通用标签 === */
.vuc-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid;
}
.vuc-tag--green  { color: var(--vuc-green);  border-color: rgba(0,255,136,0.3); background: rgba(0,255,136,0.08); }
.vuc-tag--cyan   { color: var(--vuc-cyan);   border-color: rgba(108,160,220,0.3); background: rgba(108,160,220,0.08); }
.vuc-tag--purple { color: var(--vuc-purple); border-color: rgba(123,92,255,0.3); background: rgba(123,92,255,0.08); }
.vuc-tag--gold   { color: var(--vuc-gold);   border-color: rgba(201,168,76,0.3); background: rgba(201,168,76,0.08); }
.vuc-tag--pink   { color: var(--vuc-pink);   border-color: rgba(255,107,157,0.3); background: rgba(255,107,157,0.08); }

/* === Hero 区渐变背景 === */
.vuc-hero-bg {
  background:
    radial-gradient(ellipse at 30% 20%, rgba(0,255,136,0.08), transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(123,92,255,0.06), transparent 50%),
    var(--vuc-bg);
}

/* === 数据表格 === */
.vuc-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.9rem;
}
.vuc-table th {
  text-align: left;
  padding: 12px 16px;
  color: var(--vuc-fg-dim);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.vuc-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.vuc-table tr:hover td {
  background: rgba(0,255,136,0.04);
}

/* === 2列/3列/4列 Grid === */
.vuc-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--vuc-space-lg); }
.vuc-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--vuc-space-lg); }
.vuc-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--vuc-space-lg); }

@media (max-width: 900px) {
  .vuc-grid-2, .vuc-grid-3, .vuc-grid-4 {
    grid-template-columns: 1fr;
  }
}

/* === 渐变色条 (卡片顶部装饰) === */
.vuc-card-accent-top {
  position: relative;
  overflow: hidden;
}
.vuc-card-accent-top::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--vuc-green), var(--vuc-cyan), var(--vuc-purple));
  border-radius: var(--vuc-radius-lg) var(--vuc-radius-lg) 0 0;
}

/* === 隐藏滚动条但可滚 (暗色主题) === */
.vuc-scroll-thin::-webkit-scrollbar { width: 4px; }
.vuc-scroll-thin::-webkit-scrollbar-track { background: transparent; }
.vuc-scroll-thin::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

/* === 简单淡入动画 === */
@keyframes vuc-fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.vuc-animate-in {
  animation: vuc-fadeIn 0.5s ease-out both;
}