/* 顶部栏整体 */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: #ffffff;
    border-bottom: 1px solid #eee;
    box-sizing: border-box;
}

/* 左侧：Logo + 网站名 */
.topbar-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.topbar-left .logo {
    height: 32px;
    width: auto;
}

.site-name {
    font-size: 20px;
    font-weight: 600;
    color: #333;
}

/* 右侧：社交图标 */
.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.topbar-right img {
    width: 24px;
    height: 24px;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.topbar-right img:hover {
    opacity: 0.7;
}

/* 图标 hover 放大 */
.topbar-right .icon {
    transition: transform 0.2s ease;
}

.topbar-right .icon:hover {
    transform: scale(1.15);
}

/* tooltip 容器 */
.icon-wrap {
    position: relative;
    display: inline-block;
}

/* tooltip 样式 */
.icon-wrap::after {
    content: attr(data-tip);
    position: absolute;
    left: 50%;
    top: 120%; /* 图标下方 */
    transform: translateX(-50%);
    background: #333;
    color: #fff;
    padding: 4px 8px;
    font-size: 12px;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
    z-index: 9999; /* 确保不被遮挡 */
}

/* hover 时显示 tooltip */
.icon-wrap:hover::after {
    opacity: 1;
}

/* 手机屏幕下的轻量自适应 */
@media (max-width: 768px) {

    /* 整体高度更紧凑 */
    .topbar {
        padding: 6px 10px;
    }

    /* 左侧：Logo + 名称缩小一点 */
    .topbar-left .logo {
        width: 26px;
        height: 26px;
        margin-right: 6px;
    }

    .topbar-left .site-name {
        font-size: 16px;
    }

    /* 右侧图标间距缩小 */
    .topbar-right {
        gap: 10px;
    }

    .topbar-right .icon {
        width: 22px;
        height: 22px;
    }

    /* 手机没有 hover，隐藏 tooltip */
    .icon-wrap::after {
        display: none;
    }
}