:root{--vs-primary: #1f6feb;--vs-primary-dark: #1a5fd0;--vs-bg: #f5f7fa;--vs-surface: #ffffff;--vs-border: #e2e8f0;--vs-text: #1e293b;--vs-muted: #64748b;--vs-danger: #dc2626;--vs-success: #16a34a;--vs-shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .04);--vs-radius: 12px}*{box-sizing:border-box}html,body{margin:0;padding:0;min-height:100%}body{font-family:Segoe UI,system-ui,-apple-system,Helvetica Neue,Arial,sans-serif;background:var(--vs-bg);color:var(--vs-text);line-height:1.55}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}.container{width:min(1140px,92vw);margin:0 auto}.btn{display:inline-flex;align-items:center;gap:.5rem;border:none;border-radius:8px;padding:.6rem 1.15rem;font-size:.95rem;font-weight:600;transition:background .15s ease,transform .05s ease}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--vs-primary);color:#fff}.btn-primary:hover{background:var(--vs-primary-dark)}.btn-ghost{background:transparent;color:var(--vs-text);border:1px solid var(--vs-border)}.btn-ghost:hover{background:#f1f5f9}.btn-danger{background:var(--vs-danger);color:#fff}