.site-header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    /* 磨砂玻璃效果 */
    border-bottom: 1px solid #f0f2f5;
    position: sticky;
    top: 0;
    z-index: 1000;
    height: 70px;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    box-sizing: border-box;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #2d3748;
    text-decoration: none;
}

.nav-list {
    display: flex;
    gap: 25px;
    list-style: none;
}

.nav-list a {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-list li.current a,
.nav-list a:hover {
    color: #4a90e2;
}

@media (max-width: 768px) {
    .site-nav {
        display: none;
    }

    .header-container {
        padding: 0 15px;
    }
}