/* ==================== 内容区域容器 ==================== */
    .gzy_content {
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 40px 20px;
    }

    /* ==================== 模块通用样式 ==================== */
    .content-section {
        margin-bottom: 60px;
    }

    .content-section__title {
        font-size: 1.8rem;
        font-weight: 700;
        color: #1a1a1a;
        text-align: center;
        padding-bottom: 15px;
        border-bottom: 2px solid var(--primary);
        display: inline-block;
    }

    .content-section__header {
        text-align: center;
        margin-bottom: 40px;
    }

    /* ==================== 视频模块 ==================== */
    .video-wrapper {
        width: 100%;
        max-width: 900px;
        margin: 0 auto;
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow);
    }

    .video-wrapper mux-player {
        width: 100%;
        aspect-ratio: 16 / 9;
    }

    /* ==================== 安装步骤模块 ==================== */
    .steps-list {
        display: flex;
        flex-direction: column;
        gap: 30px;
    }

    .step-item {
        display: flex;
        gap: 30px;
        background: var(--card-bg);
        border-radius: var(--radius);
        padding: 24px;
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
        align-items: center;
    }

    /* 偶数步骤：图片在左，文字在右 */
    .step-item--reverse {
        flex-direction: row-reverse;
    }

    .step-item__number {
        flex-shrink: 0;
        width: 48px;
        height: 48px;
        background: var(--primary);
        color: #fff;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        font-weight: 700;
    }

    .step-item__text {
        flex: 1;
        min-width: 0;
    }

    .step-item__title {
        font-size: 1.1rem;
        font-weight: 700;
        margin-bottom: 10px;
        color: #1a1a1a;
    }

    .step-item__desc {
        font-size: 0.95rem;
        color: var(--text-light);
        line-height: 1.7;
    }

    .step-item__img-wrapper {
        flex: 1;
        min-width: 0;
    }

    .step-item__img {
        width: 100%;
        height: auto;
        display: block;
        border-radius: 8px;
        object-fit: contain;
        background: #f9f9f9;
    }

    /* ==================== QA模块 ==================== */
    .qa-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
        max-width: 900px;
        margin: 0 auto;
    }

    .qa-item {
        background: var(--card-bg);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        overflow: hidden;
    }

    .qa-item__question {
        width: 100%;
        text-align: left;
        padding: 18px 24px;
        background: none;
        border: none;
        cursor: pointer;
        font-size: 1rem;
        font-weight: 600;
        color: #1a1a1a;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-family: inherit;
        transition: background 0.2s;
    }

    .qa-item__question:hover {
        background: #f9fafb;
    }

    .qa-item__icon {
        font-size: 1.2rem;
        color: var(--primary);
        transition: transform 0.3s;
        flex-shrink: 0;
        margin-left: 16px;
    }

    .qa-item--open .qa-item__icon {
        transform: rotate(45deg);
    }

    .qa-item__answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        padding: 0 24px;
        font-size: 0.95rem;
        color: var(--text-light);
        line-height: 1.7;
    }

    .qa-item--open .qa-item__answer {
        max-height: 300px;
        padding: 0 24px 18px;
    }

   /* ==================== 响应式：手机端文字和图片各占一行 ==================== */
    @media (max-width: 768px) {
        .step-item,
        .step-item--reverse {
            flex-direction: column;
            gap: 15px;
            padding: 20px;
        }

        .step-item__number {
            width: 40px;
            height: 40px;
            font-size: 1rem;
            align-self: flex-start;
        }
    }

    @media (max-width: 480px) {
        .step-item,
        .step-item--reverse {
            padding: 16px;
            gap: 12px;
        }

        .step-item__title {
            font-size: 1rem;
        }

        .step-item__desc {
            font-size: 0.85rem;
        }
    }