:root {
    --sg-bg: #1e293b;
    --sg-bg-deep: #1e293b;
    --sg-surface: rgba(255,255,255,0.06);
    --sg-surface-hover: rgba(255,255,255,0.10);
    --sg-surface-active: rgba(255,255,255,0.14);
    --sg-accent: #38bdf8;
    --sg-accent-light: #7dd3fc;
    --sg-accent-dim: rgba(56,189,248,0.08);
    --sg-accent-glow: rgba(56,189,248,0.18);
    --sg-warm: #f59e0b;
    --sg-warm-dim: rgba(245,158,11,0.08);
    --sg-blue-dark: #1e3a5f;
    --sg-blue-deep: #152a45;
    --sg-text: #f1f5f9;
    --sg-text-secondary: #cbd5e1;
    --sg-text-muted: #94a3b8;
    --sg-text-dim: #64748b;
    --sg-border: rgba(255,255,255,0.08);
    --sg-border-hover: rgba(56,189,248,0.35);
    --sg-radius: 16px;
    --sg-radius-sm: 10px;
    --sg-radius-xs: 6px;
    --sg-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --sg-danger: #f87171;
    --sg-danger-light: #fca5a5;
    --sg-success: #34d399;
    --sg-blue: #60a5fa;
    --sg-red: #f87171;
    --sg-purple: #a78bfa;
    --sg-cyan: #22d3ee;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background: var(--sg-bg);
    color: var(--sg-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

[v-cloak] { display: none; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--sg-accent);
    outline-offset: 2px;
}