:root {
    --brand: #0d6efd;
    --muted: #6c757d;
    --bg: #f8f9fa;
}

body.custom-body {
    background: linear-gradient(180deg,#ffffff 0%, var(--bg) 100%);
    color: #333;
    font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
}

header .navbar-brand {
    font-weight: 600;
}

footer small.text-muted a {
    color: var(--muted);
    text-decoration: none;
}