/* ===== 原样式 ===== */
    .service-flow-section {
        max-width: 1200px;
        margin: 0 auto;
        padding: 40px 20px 60px;
        font-family: "Inter", "Segoe UI", Arial, sans-serif;
        color: #222;
    }
    .service-flow-section .section-title {
        text-align: center;
        margin-bottom: 40px;
    }
    .service-flow-section .section-title h2 {
        font-size: 32px;
        font-weight: 700;
        color: #1a2a4a;
        letter-spacing: 1px;
        margin-bottom: 10px;
    }
    .service-flow-section .section-title p {
        font-size: 16px;
        color: #888;
        max-width: 650px;
        margin: 0 auto;
        line-height: 1.7;
    }
    .service-flow-section .section-title .line {
        width: 50px;
        height: 3px;
        background: #2b7be4;
        margin: 12px auto 0;
    }
    .service-flow-section .flow-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        margin-top: 20px;
    }
    .service-flow-section .flow-item {
        background: #f8faff;
        border-radius: 14px;
        padding: 20px 16px 24px;
        border: 1px solid #eef4ff;
        transition: transform 0.3s, box-shadow 0.3s;
        text-align: center;
    }
    .service-flow-section .flow-item:hover {
        transform: translateY(-4px);
        box-shadow: 0 8px 30px rgba(43, 123, 228, 0.10);
    }
    .service-flow-section .flow-item img {
        width: 100%;
        height: auto;
        display: block;
        border-radius: 8px;
        margin-bottom: 12px;
        cursor: pointer;
        transition: opacity 0.2s;
    }
    .service-flow-section .flow-item img:hover {
        opacity: 0.85;
    }
    .service-flow-section .flow-item h4 {
        font-size: 18px;
        font-weight: 700;
        color: #1a2a4a;
        margin-bottom: 4px;
    }
    .service-flow-section .flow-item p {
        font-size: 14px;
        color: #666;
        line-height: 1.6;
        text-align: left;
        padding: 0 4px;
    }

    @media (max-width: 768px) {
        .service-flow-section .flow-grid {
            grid-template-columns: 1fr;
        }
        .service-flow-section .section-title h2 {
            font-size: 24px;
        }
        .service-flow-section { padding: 20px 12px 40px; }
    }

    /* ===== 弹窗样式 ===== */
    .image-lightbox {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.85);
        z-index: 99999;
        justify-content: center;
        align-items: center;
        cursor: pointer;
        padding: 30px;
        box-sizing: border-box;
    }
    .image-lightbox.active {
        display: flex;
    }
    .image-lightbox img {
        max-width: 95%;
        max-height: 95%;
        object-fit: contain;
        border-radius: 8px;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        cursor: default;
    }
    .image-lightbox .close-btn {
        position: fixed;
        top: 24px;
        right: 32px;
        font-size: 40px;
        color: #fff;
        cursor: pointer;
        font-weight: 300;
        line-height: 1;
        transition: transform 0.2s;
        z-index: 100000;
        background: none;
        border: none;
        padding: 0;
        font-family: Arial, sans-serif;
    }
    .image-lightbox .close-btn:hover {
        transform: rotate(90deg);
    }
    .image-lightbox .hint {
        position: fixed;
        bottom: 30px;
        left: 50%;
        transform: translateX(-50%);
        color: rgba(255, 255, 255, 0.4);
        font-size: 14px;
        font-family: "Inter", Arial, sans-serif;
        letter-spacing: 1px;
        pointer-events: none;
    }

    @media (max-width: 768px) {
        .image-lightbox { padding: 16px; }
        .image-lightbox .close-btn {
            top: 16px;
            right: 20px;
            font-size: 32px;
        }
        .image-lightbox .hint { display: none; }
    }