/* ---------- 双驱动方案主容器 (纯白背景) ---------- */
    .dual-drive-section {
        padding: 70px 0;
        background: #ffffff;  /* 纯白背景 */
        position: relative;
        overflow: hidden;
    }

    /* 移除原有的装饰性背景图案 */
    .dual-drive-section::before {
        display: none;
    }

    /* ---------- 方案区块 ---------- */
    .solution-block {
        background: white;
        border-radius: 16px;
        box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
        margin-bottom: 36px;
        overflow: hidden;
        border: 1px solid rgba(42, 92, 170, 0.08);
        transition: box-shadow 0.3s ease;
        position: relative;
        z-index: 1;
    }

    .solution-block:hover {
        box-shadow: 0 8px 36px rgba(42, 92, 170, 0.10);
    }

    /* ---------- 方案头部 ---------- */
    .solution-header {
        padding: 28px 32px 18px;
        text-align: center;
        border-bottom: 1px solid #edf2f9;
    }

    .solution-badge {
        display: inline-block;
        padding: 8px 22px;
        border-radius: 30px;
        font-weight: 700;
        font-size: 0.95rem;
        letter-spacing: 0.3px;
        font-family: 'Montserrat', sans-serif;
    }

    .badge-mobile {
        background: #eef6ff;
        color: #2A5CAA;
    }

    .badge-pc {
        background: #f0faf5;
        color: #1a7a4c;
    }

    .solution-subtitle {
        margin: 10px 0 0;
        color: #666;
        font-size: 0.95rem;
        line-height: 1.5;
    }

    /* ---------- Mobile 卡片容器 ---------- */
    .mobile-cards {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0;
        padding: 28px 32px 32px;
    }

    @media (max-width: 900px) {
        .mobile-cards {
            grid-template-columns: 1fr;
            gap: 24px;
            padding: 20px;
        }
    }

    /* ---------- 单个 Mobile 卡片 ---------- */
    .mobile-card {
        position: relative;
        background: #fafcff;
        border-radius: 14px;
        padding: 28px 24px 22px;
        border: 1px solid #e8eff8;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        display: flex;
        flex-direction: column;
    }

    .mobile-card:hover {
        transform: translateY(-3px);
        box-shadow: 0 8px 28px rgba(42, 92, 170, 0.10);
    }

    .mobile-card+.mobile-card {
        margin-left: 20px;
    }

    @media (max-width: 900px) {
        .mobile-card+.mobile-card {
            margin-left: 0;
        }
    }

    .mobile-card-tag {
        position: absolute;
        top: 16px;
        right: 18px;
        padding: 5px 14px;
        border-radius: 20px;
        font-weight: 700;
        font-size: 0.8rem;
        letter-spacing: 0.4px;
        font-family: 'Montserrat', sans-serif;
        background: #2A5CAA;
        color: white;
        z-index: 2;
    }

    .tag-ios {
        background: #333;
    }

    .mobile-card-title {
        font-size: 1.25rem;
        color: #2A5CAA;
        margin: 0 0 20px;
        font-weight: 600;
        font-family: 'Montserrat', sans-serif;
        padding-right: 60px;
        line-height: 1.3;
    }

    .mobile-card-body {
        display: flex;
        gap: 22px;
        align-items: stretch;
        flex: 1;
        min-height: 0;
    }

    @media (max-width: 600px) {
        .mobile-card-body {
            flex-direction: column;
            gap: 18px;
        }
    }

    /* ---------- 引导区块（二维码 / App Store）---------- */
    .guide-block {
        flex: 0 0 42%;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        background: white;
        border-radius: 10px;
        padding: 20px 16px;
        text-align: center;
        border: 1px solid #edf2f9;
        min-height: 180px;
    }

    @media (max-width: 600px) {
        .guide-block {
            flex: 1 1 auto;
            min-height: auto;
            padding: 16px 14px;
        }
    }

    .guide-label {
        font-size: 0.9rem;
        color: #555;
        margin: 0 0 14px;
        font-weight: 500;
    }

    .qr-wrapper {
        display: flex;
        flex-direction: column;
        align-items: center;
        margin-bottom: 12px;
    }

    .qr-image {
        width: 120px;
        height: 120px;
        object-fit: contain;
        border-radius: 8px;
        background: white;
        padding: 5px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }

    .qr-link-text {
        font-size: 0.75rem;
        color: #888;
        margin-top: 5px;
    }

    .qr-link-text a {
        color: #2A5CAA;
        text-decoration: none;
        word-break: break-all;
    }

    .btn-download-apk {
        display: inline-block;
        padding: 10px 24px;
        background: #2A5CAA;
        color: white;
        border-radius: 30px;
        text-decoration: none;
        font-weight: 500;
        font-size: 0.9rem;
        transition: background 0.3s ease, transform 0.2s ease;
        box-shadow: 0 4px 14px rgba(42, 92, 170, 0.22);
    }

    .btn-download-apk:hover {
        background: #4A7CC8;
        transform: translateY(-2px);
    }

    /* App Store */
    .appstore-wrapper {
        display: flex;
        flex-direction: column;
        align-items: center;
        margin-bottom: 4px;
    }

    .appstore-image {
        width: 130px;
        height: auto;
        object-fit: contain;
        border-radius: 14px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
        background: white;
        padding: 5px;
    }

    .appstore-hint {
        font-size: 0.9rem;
        color: #555;
        margin-top: 8px;
    }

    .appstore-hint strong {
        color: #2A5CAA;
        font-weight: 600;
    }

    /* ---------- 视频区块 ---------- */
    .video-block {
        flex: 1;
        display: flex;
        flex-direction: column;
        min-width: 0;
    }

    .video-player {
        position: relative;
        width: 100%;
        padding-bottom: 56.25%;
        background: #111;
        border-radius: 10px;
        overflow: hidden;
        cursor: pointer;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
        transition: box-shadow 0.3s ease;
    }

    .video-player:hover {
        box-shadow: 0 6px 22px rgba(0, 0, 0, 0.16);
    }

    .video-thumb {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        transition: transform 0.4s ease;
    }

    .video-player:hover .video-thumb {
        transform: scale(1.03);
    }

    .play-overlay {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(0, 0, 0, 0.28);
        transition: background 0.3s ease;
    }

    .video-player:hover .play-overlay {
        background: rgba(0, 0, 0, 0.16);
    }

    .play-btn {
        width: 64px;
        height: 64px;
        background: rgba(255, 255, 255, 0.93);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: transform 0.3s ease, background 0.3s ease;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        backdrop-filter: blur(2px);
    }

    .video-player:hover .play-btn {
        transform: scale(1.07);
        background: white;
    }

    .play-btn svg {
        margin-left: 4px;
        width: 36px;
        height: 36px;
        filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.18));
    }

    .video-player iframe {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        border: none;
        border-radius: 10px;
    }

    .video-label {
        font-size: 0.82rem;
        color: #888;
        text-align: center;
        margin: 8px 0 0;
        letter-spacing: 0.3px;
        transition: color 0.3s ease;
    }

    .video-block:hover .video-label {
        color: #2A5CAA;
    }

    /* ---------- PC Solution 内容 ---------- */
    .pc-content {
        display: flex;
        gap: 30px;
        padding: 28px 32px 20px;
        align-items: flex-start;
    }

    @media (max-width: 900px) {
        .pc-content {
            flex-direction: column;
            padding: 20px;
            gap: 20px;
        }
    }

    .pc-info {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 18px;
    }

    .pc-reader-intro {
        display: flex;
        align-items: center;
        gap: 18px;
        flex-wrap: wrap;
    }

    .reader-qr-img {
        width: 110px;
        height: 110px;
        object-fit: contain;
        border-radius: 10px;
        background: white;
        padding: 5px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
        transition: transform 0.3s ease;
    }

    .reader-qr-link:hover .reader-qr-img {
        transform: scale(1.04);
    }

    .btn-reader-link {
        display: inline-block;
        padding: 11px 22px;
        background: #1a7a4c;
        color: white;
        border-radius: 30px;
        text-decoration: none;
        font-weight: 500;
        font-size: 0.9rem;
        transition: background 0.3s ease, transform 0.2s ease;
        box-shadow: 0 4px 14px rgba(26, 122, 76, 0.22);
        white-space: nowrap;
    }

    .btn-reader-link:hover {
        background: #238b5a;
        transform: translateY(-2px);
    }

    .pc-features {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .pc-features li {
        padding: 10px 0;
        border-bottom: 1px dashed #e8e8e8;
        font-size: 0.93rem;
        color: #444;
        line-height: 1.55;
    }

    .pc-features li:last-child {
        border-bottom: none;
    }

    .pc-features li strong {
        display: block;
        color: #2A5CAA;
        font-weight: 600;
        margin-bottom: 3px;
        font-size: 0.95rem;
    }

    .pc-features li span {
        color: #666;
        font-size: 0.88rem;
    }

    .pc-video {
        flex: 0 0 340px;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    @media (max-width: 900px) {
        .pc-video {
            flex: 1 1 auto;
            width: 100%;
            max-width: 500px;
            margin: 0 auto;
        }
    }

    .pc-video-player {
        border-radius: 10px;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
        background: #000;
        width: 100%;
        max-width: 340px;
    }

    /* ---------- NFC 注意事项 ---------- */
    .nfc-note {
        margin: 0 32px 24px;
        padding: 14px 20px;
        background: #fffdf5;
        border-radius: 10px;
        border: 1px solid #f0e6b0;
        font-size: 0.9rem;
        color: #6b5e1a;
        line-height: 1.5;
    }

    @media (max-width: 600px) {
        .nfc-note {
            margin: 0 16px 20px;
            font-size: 0.84rem;
        }
    }

    /* ---------- 响应式微调 ---------- */
    @media (max-width: 768px) {
        .solution-header {
            padding: 22px 18px 14px;
        }

        .solution-badge {
            font-size: 0.85rem;
            padding: 6px 16px;
        }

        .solution-subtitle {
            font-size: 0.88rem;
        }

        .mobile-card {
            padding: 22px 16px 18px;
        }

        .mobile-card-title {
            font-size: 1.1rem;
            padding-right: 50px;
        }

        .play-btn {
            width: 50px;
            height: 50px;
        }

        .play-btn svg {
            width: 28px;
            height: 28px;
        }

        .qr-image {
            width: 90px;
            height: 90px;
        }

        .appstore-image {
            width: 100px;
        }

        .reader-qr-img {
            width: 85px;
            height: 85px;
        }
    }

    @media (max-width: 480px) {
        .dual-drive-section {
            padding: 40px 0;
        }

        .solution-block {
            border-radius: 12px;
            margin-bottom: 24px;
        }

        .mobile-cards {
            padding: 14px;
        }

        .mobile-card {
            padding: 18px 12px 14px;
        }

        .mobile-card-title {
            font-size: 1rem;
            padding-right: 44px;
        }

        .btn-download-apk,
        .btn-reader-link {
            padding: 8px 18px;
            font-size: 0.82rem;
        }

        .pc-content {
            padding: 14px;
        }

        .pc-video-player {
            max-width: 100%;
        }
    }