/* Header - 蓝色背景 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 60px;
    height: 64px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #3C8CFF;
    transition: all 0.3s;
}

.header > svg {
    align-self: center;
    display: block;
}

.nav {
    display: flex;
    gap: 40px;
}

.nav a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    transition: color 0.2s;
}

.nav a:hover {
    color: #fff;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .header {
        padding: 0 20px;
        height: 56px;
    }

    .nav {
        display: none;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: #3C8CFF;
        flex-direction: column;
        padding: 12px 20px;
        gap: 0;
    }

    .nav a {
        padding: 10px 0;
        border-bottom: 1px solid rgba(255,255,255,0.15);
    }

    .menu-toggle {
        display: block;
    }
}