body {
    padding-top: 10px;
    background-image: url("/images/bg/blue-yellow-blue.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: left top;
}

/* 顶部简易导航栏（悬浮效果） */

nav.navbar-floating {
    margin: 0.75rem 2rem 0;
    padding: 0.5rem 1rem;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    overflow: hidden;
}

@media (max-width: 768px) {
    nav.navbar-floating {
        margin: 0.5rem 0.7rem 0;
        border-radius: 12px;
        padding: 0.5rem 0.2rem;
    }
}