.main02c {
        color: #909399;
        opacity: 0.6;
        font-size: 14px;
        display: none;
        width: 1200px;
        margin: 10px auto;
    }

    /* 问号元素：保持原有样式，增加hover光标反馈 */
    .help-icon {
        border-radius: 50%;
        width: 20px;
        height: 20px;
        background-color: black;
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 12px;
        cursor: help;
        border: none;
        margin: 0;
        cursor: pointer;
        margin-left: -16px;
    }

    /* 提示框：默认隐藏，hover时显示 */
    .help-tooltip {
        position: absolute;
        top: 80%;
        left: 12%;
        transform: translateX(-50%);
        margin-top: 8px;

        /* 样式：白色背景+阴影+圆角，确保清晰可见 */
        background-color: black;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        border-radius: 4px;
        padding: 8px 12px;
        font-size: 12px;
        color: white;
        line-height: 1.4;
        white-space: normal;
        max-width: 300px;
        opacity: 0;
        visibility: hidden;
        height: 0;
        overflow: hidden;
        transition: opacity 0.2s ease, visibility 0.2s ease, height 0.2s ease;
        z-index: 10;
    }

    .help-icon:hover+.help-tooltip,
    .help-tooltip:hover {
        opacity: 1;
        visibility: visible;
        height: auto;
    }

    #dns-detail-container .active {
        background: #1890ff;
        color: white;
        /* color: #1890ff; */
    }

    .dns-container {
        display: flex;
        align-items: center;
        gap: 10px;
        margin: 15px 0;
        font-size: 14px;
    }

    .dns-container label {
        cursor: pointer;
    }

    #testResult {
        /* padding: 6px 10px; */
        width: 180px;
        border: 1px solid #ccc;
        border-radius: 5px;
        outline: none;
        transition: border-color 0.2s, box-shadow 0.2s;
    }

    #testResult:focus {
        border-color: #0078d7;
        box-shadow: 0 0 3px rgba(0, 120, 215, 0.4);
    }

    /* 下拉框样式 */
    .dns-dropdown {
        position: absolute;
        background: #fff;
        border: 1px solid #ccc;
        border-radius: 6px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        margin-top: 2px;
        width: 180px;
        display: none;
        z-index: 100;
    }

    .dns-option {
        padding: 6px 10px;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        cursor: pointer;
        color: #666;
    }

    .dns-option label {
        cursor: pointer;
    }

    .dns-option:hover {
        background: #f3f7ff;
        color: #0078d7;
    }

    .page04d4 p {
        cursor: pointer;
        padding: 5px 10px;
        margin: 0;
    }

    .page04d4 p.active {
        background-color: #0089d1;
        border-radius: 4px;
        color: white;
    }