/* 全局顶栏容器 */
.top-bar {
    height: 60px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    background: #2d2d2d;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* 左侧 Logo 区域 */
.top-bar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo-icon {
    width: 40px;
    height: 40px;
    object-fit: contain;
}
.logo-text {
    font-size: 28px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 1px;
}

/* 中间文件夹按钮 */
.top-bar-center {
    flex: 1;
    display: flex;
    justify-content: center;
}
.folder-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s ease;
}
.folder-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}
.folder-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
    filter: brightness(0) invert(1);
}
.folder-text {
    font-size: 16px;
    color: #ffffff;
}

/* 右侧功能区 */
.top-bar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}
.login-btn {
    padding: 6px 16px;
    background: transparent;
    border: 1px solid #ffffff;
    border-radius: 4px;
    color: #ffffff;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s ease;
}
.login-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}
.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #409eff;
    cursor: pointer;
}
.help-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s ease;
}
.help-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}
.help-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
}