.mu5735-archive {
        max-width: 850px;
        margin: 0 auto;
        background: #fff;
        font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        border: 1px solid #eee;
        box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    }

    /* Banner 样式 */
    .archive-banner {
        position: relative;
        height: 300px;
        overflow: hidden;
        background: #000;
    }
    .banner-img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        opacity: 0.6; /* 调暗图片 */
        filter: grayscale(40%); /* 略微去色增加肃穆感 */
    }
    .banner-overlay {
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 60%;
        background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
        z-index: 1;
    }
    .banner-text {
        position: absolute;
        bottom: 40px;
        left: 40px;
        z-index: 2;
        color: #fff;
    }
    .banner-line {
        width: 40px;
        height: 3px;
        background: #ff6600;
        margin-bottom: 15px;
    }
    .banner-text h1 { margin: 0; font-size: 26px; font-weight: 900; letter-spacing: 1px; }
    .banner-text p { margin: 5px 0 0 0; font-size: 14px; opacity: 0.7; font-style: italic; }

    /* 内容区样式 */
    .archive-body { padding: 40px; }
    .file-item {
        display: flex;
        gap: 25px;
        margin-bottom: 40px;
        border-bottom: 1px solid #f0f0f0;
        padding-bottom: 30px;
    }
    .file-icon-box {
        width: 60px;
        height: 60px;
        flex-shrink: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 12px;
        font-weight: bold;
        color: #fff;
        border-radius: 4px;
    }
    .pdf { background: #333; }
    .csv { background: #555; }
    .upk { background: #777; }
    .txt { background: #999; }

    .file-main h3 { margin: 0 0 5px 0; font-size: 18px; color: #000; }
    .file-meta { font-size: 12px; color: #ff6600; font-weight: bold; text-transform: uppercase; }
    .file-main p { font-size: 14px; color: #555; line-height: 1.8; margin: 15px 0; }
    
    .dl-link {
        font-size: 13px;
        color: #000;
        text-decoration: none;
        border-bottom: 1px solid #000;
        padding-bottom: 2px;
        font-weight: bold;
    }
    .dl-link:hover { color: #ff6600; border-color: #ff6600; }

    /* 打包区 */
    .footer-pack {
        background: #f9f9f9;
        padding: 30px;
        text-align: center;
        border-radius: 8px;
        border: 1px solid #eee;
    }
    .footer-pack p { font-size: 13px; color: #888; margin-bottom: 15px; font-family: monospace; }
    .btn-main-dl {
        display: inline-block;
        background: #000;
        color: #fff;
        text-decoration: none;
        padding: 15px 40px;
        font-weight: bold;
        border-radius: 4px;
        transition: 0.3s;
    }
    .btn-main-dl:hover { background: #ff6600; transform: translateY(-2px); }

    @media (max-width: 600px) {
        .file-item { flex-direction: column; gap: 15px; }
        .banner-text { left: 20px; bottom: 20px; }
    }