/* =============================================================================
 * 产品详情页「下载」标签页（2.10.46）
 *
 *   .cxb-b2b-downloads-container.cxb-b2b-dl
 *     > ul.cxb-b2b-dl-list
 *       > li.cxb-b2b-dl-item.cxb-b2b-dl--{pdf|doc|xls|ppt|zip|img|cad|video|txt|file}
 *         > .cxb-b2b-dl-type                      类型色块
 *         > .cxb-b2b-dl-info > .cxb-b2b-dl-name + .cxb-b2b-dl-size
 *         > .cxb-b2b-dl-actions > a.cxb-b2b-dl-preview + a.cxb-b2b-dl-button
 *
 * 整行可点：下载按钮的 ::after 铺满整行，Preview 用 z-index 叠在它上面。
 *
 * 选择器统一以 .cxb-b2b-dl 开头（0,2,0 起），高于主题常见的 .entry-content a、
 * ul li 之类。链接的颜色、下划线、边框、阴影是主题最爱改的几项，末尾那一段
 * 对它们单独加了 !important。
 * ========================================================================== */

.cxb-b2b-dl {
    --cxb-dl-accent: var(--cxb-primary-color, #0a7aff);
    --cxb-dl-accent-hover: var(--cxb-primary-color-hover, var(--cxb-dl-accent));
    --cxb-dl-accent-soft: #eaf2ff;
    --cxb-dl-accent-text: var(--cxb-dl-accent);
    --cxb-dl-ink: #1b2533;
    --cxb-dl-muted: #5f6b7a;
    --cxb-dl-line: #e3e7ed;
    --cxb-dl-surface: #ffffff;
    --cxb-dl-hover: #f6f8fb;
    --cxb-dl-radius: 10px;

    /* 类型色：底色取 12% 浅色，文字用加深色保证对比度 */
    --cxb-dl-t: #5b6675;

    margin: 20px 0 0;
    padding: 0;
    color: var(--cxb-dl-ink);
    font-size: 15px;
    line-height: 1.45;
    container-type: inline-size;
}

@supports (color: color-mix(in srgb, red 50%, blue)) {
    .cxb-b2b-dl {
        --cxb-dl-accent-soft: color-mix(in srgb, var(--cxb-dl-accent) 10%, #ffffff);
        --cxb-dl-accent-text: color-mix(in srgb, var(--cxb-dl-accent) 80%, #000000);
    }
}
/* 主色当文字用在浅底上：把明度夹到 0.5 以下，换成亮黄、亮绿这类品牌色也读得清 */
@supports (color: oklch(from red l c h)) {
    .cxb-b2b-dl {
        --cxb-dl-accent-text: oklch(from var(--cxb-dl-accent) min(l, .5) c h);
    }
}

.cxb-b2b-dl *,
.cxb-b2b-dl *::before,
.cxb-b2b-dl *::after {
    box-sizing: border-box;
}

.cxb-b2b-dl .cxb-b2b-dl-list {
    margin: 0;
    padding: 0;
    overflow: hidden;
    border: 1px solid var(--cxb-dl-line);
    border-radius: var(--cxb-dl-radius);
    background: var(--cxb-dl-surface);
    list-style: none;
}

/* ---- 行 ---- */
.cxb-b2b-dl .cxb-b2b-dl-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 16px;
    min-height: 72px;
    margin: 0;
    padding: 14px 16px 14px 18px;
    border: 0;
    border-top: 1px solid var(--cxb-dl-line);
    background: transparent;
    list-style: none;
    transition: background-color .15s ease;
}
.cxb-b2b-dl .cxb-b2b-dl-item:first-child {
    border-top: 0;
}
.cxb-b2b-dl .cxb-b2b-dl-item::before,
.cxb-b2b-dl .cxb-b2b-dl-item::marker {
    content: none;
}
.cxb-b2b-dl .cxb-b2b-dl-item:hover,
.cxb-b2b-dl .cxb-b2b-dl-item:focus-within {
    background: var(--cxb-dl-hover);
}

/* ---- 类型色块 ---- */
.cxb-b2b-dl .cxb-b2b-dl-type {
    display: inline-flex;
    flex: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    background: color-mix(in srgb, var(--cxb-dl-t) 12%, #ffffff);
    color: var(--cxb-dl-t);
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: .02em;
    font-variant-numeric: tabular-nums;
}
@supports not (color: color-mix(in srgb, red 50%, blue)) {
    .cxb-b2b-dl .cxb-b2b-dl-type {
        background: #eef1f5;
    }
}

.cxb-b2b-dl .cxb-b2b-dl--pdf   { --cxb-dl-t: #c5221f; }
.cxb-b2b-dl .cxb-b2b-dl--doc   { --cxb-dl-t: #1a5fd1; }
.cxb-b2b-dl .cxb-b2b-dl--xls   { --cxb-dl-t: #137333; }
.cxb-b2b-dl .cxb-b2b-dl--ppt   { --cxb-dl-t: #b3470b; }
.cxb-b2b-dl .cxb-b2b-dl--zip   { --cxb-dl-t: #5b6270; }
.cxb-b2b-dl .cxb-b2b-dl--img   { --cxb-dl-t: #7b3fb0; }
.cxb-b2b-dl .cxb-b2b-dl--cad   { --cxb-dl-t: #00695c; }
.cxb-b2b-dl .cxb-b2b-dl--video { --cxb-dl-t: #b0175b; }
.cxb-b2b-dl .cxb-b2b-dl--txt,
.cxb-b2b-dl .cxb-b2b-dl--file  { --cxb-dl-t: #5b6675; }

/* ---- 名称与大小 ---- */
.cxb-b2b-dl .cxb-b2b-dl-info {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}
.cxb-b2b-dl .cxb-b2b-dl-name {
    display: -webkit-box;
    overflow: hidden;
    color: var(--cxb-dl-ink);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    overflow-wrap: anywhere;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}
.cxb-b2b-dl .cxb-b2b-dl-size {
    color: var(--cxb-dl-muted);
    font-size: 13px;
    line-height: 1.3;
    font-variant-numeric: tabular-nums;
}

/* ---- 操作 ---- */
.cxb-b2b-dl .cxb-b2b-dl-actions {
    display: flex;
    flex: none;
    align-items: center;
    gap: 8px;
}

.cxb-b2b-dl .cxb-b2b-dl-preview,
.cxb-b2b-dl .cxb-b2b-dl-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 40px;
    margin: 0;
    padding: 0 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}

.cxb-b2b-dl .cxb-b2b-dl-preview {
    position: relative;
    z-index: 2; /* 压在整行下载热区之上 */
    border: 1px solid var(--cxb-dl-line);
    background: var(--cxb-dl-surface);
    color: var(--cxb-dl-ink);
}
.cxb-b2b-dl .cxb-b2b-dl-preview:hover {
    border-color: #c5ccd6;
    background: var(--cxb-dl-surface);
    color: var(--cxb-dl-ink);
}

/* 平时是浅底主色：九个文件就是九个按钮，全部实心太吵。
   指到这一行（或键盘聚焦）时变成实心，同时提示整行都能点。 */
.cxb-b2b-dl .cxb-b2b-dl-button {
    padding: 0 16px;
    border: 1px solid transparent;
    background: var(--cxb-dl-accent-soft);
    color: var(--cxb-dl-accent-text);
}
/* 整行热区 */
.cxb-b2b-dl .cxb-b2b-dl-button::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
}
/* 实心态用加深后的主色：白字压在 #0A7AFF 这类亮蓝上只有约 4:1，加深后稳定在 4.5:1 以上 */
.cxb-b2b-dl .cxb-b2b-dl-item:hover .cxb-b2b-dl-button,
.cxb-b2b-dl .cxb-b2b-dl-button:hover,
.cxb-b2b-dl .cxb-b2b-dl-button:focus-visible {
    background: var(--cxb-dl-accent-text);
    color: #ffffff;
}

.cxb-b2b-dl .cxb-b2b-dl-icon {
    display: block;
    flex: none;
    width: 18px;
    height: 18px;
}

/* 下载按钮图标：悬停整行时轻轻下移，提示点击会下载 */
.cxb-b2b-dl .cxb-b2b-dl-button .cxb-b2b-dl-icon {
    transition: transform .2s ease;
}
.cxb-b2b-dl .cxb-b2b-dl-item:hover .cxb-b2b-dl-button .cxb-b2b-dl-icon {
    transform: translateY(2px);
}

/* ---- 焦点 ---- */
.cxb-b2b-dl .cxb-b2b-dl-preview:focus-visible,
.cxb-b2b-dl .cxb-b2b-dl-button:focus-visible {
    outline: 2px solid var(--cxb-dl-accent);
    outline-offset: 2px;
}

/* ---- 窄容器（手机、或标签页区域本身很窄） ----
   按钮收成 44px 的图标按钮，留在同一行：整行本来就能点下载，
   不必再用整行宽的大按钮把每个文件撑到两倍高。 */
@container (max-width: 560px) {
    .cxb-b2b-dl .cxb-b2b-dl-item {
        gap: 12px;
        min-height: 68px;
        padding: 12px 12px 12px 14px;
    }
    .cxb-b2b-dl .cxb-b2b-dl-type {
        width: 40px;
        height: 40px;
        font-size: 10px;
    }
    .cxb-b2b-dl .cxb-b2b-dl-name {
        font-size: 14.5px;
    }
    .cxb-b2b-dl .cxb-b2b-dl-actions {
        gap: 6px;
    }
    .cxb-b2b-dl .cxb-b2b-dl-preview,
    .cxb-b2b-dl .cxb-b2b-dl-button {
        width: 44px;
        min-height: 44px;
        padding: 0;
    }
    .cxb-b2b-dl .cxb-b2b-dl-icon {
        width: 20px;
        height: 20px;
    }
    /* 文字只留给读屏软件（链接另有完整的 aria-label） */
    .cxb-b2b-dl .cxb-b2b-dl-text {
        position: absolute;
        width: 1px;
        height: 1px;
        margin: -1px;
        padding: 0;
        overflow: hidden;
        clip: rect(0 0 0 0);
        white-space: nowrap;
        border: 0;
    }
}

/* 320px 级别的超窄屏：色块与间距再收一点，给文件名留出宽度 */
@container (max-width: 340px) {
    .cxb-b2b-dl .cxb-b2b-dl-item {
        gap: 10px;
        padding: 10px;
    }
    .cxb-b2b-dl .cxb-b2b-dl-type {
        width: 34px;
        height: 34px;
        border-radius: 7px;
        font-size: 9.5px;
    }
    .cxb-b2b-dl .cxb-b2b-dl-actions {
        gap: 4px;
    }
}

/* 不支持容器查询的旧浏览器按视口宽度退回同样的排版 */
@supports not (container-type: inline-size) {
    @media (max-width: 600px) {
        .cxb-b2b-dl .cxb-b2b-dl-item {
            gap: 12px;
            min-height: 68px;
            padding: 12px 12px 12px 14px;
        }
        .cxb-b2b-dl .cxb-b2b-dl-type {
            width: 40px;
            height: 40px;
            font-size: 10px;
        }
        .cxb-b2b-dl .cxb-b2b-dl-name {
            font-size: 14.5px;
        }
        .cxb-b2b-dl .cxb-b2b-dl-actions {
            gap: 6px;
        }
        .cxb-b2b-dl .cxb-b2b-dl-preview,
        .cxb-b2b-dl .cxb-b2b-dl-button {
            width: 44px;
            min-height: 44px;
            padding: 0;
        }
        .cxb-b2b-dl .cxb-b2b-dl-icon {
            width: 20px;
            height: 20px;
        }
        /* 文字只留给读屏软件（链接另有完整的 aria-label） */
        .cxb-b2b-dl .cxb-b2b-dl-text {
            position: absolute;
            width: 1px;
            height: 1px;
            margin: -1px;
            padding: 0;
            overflow: hidden;
            clip: rect(0 0 0 0);
            white-space: nowrap;
            border: 0;
        }
    }
}

@media (prefers-reduced-motion: reduce) {
    .cxb-b2b-dl .cxb-b2b-dl-item,
    .cxb-b2b-dl .cxb-b2b-dl-preview,
    .cxb-b2b-dl .cxb-b2b-dl-button,
    .cxb-b2b-dl .cxb-b2b-dl-button .cxb-b2b-dl-icon {
        transition: none;
    }
    .cxb-b2b-dl .cxb-b2b-dl-item:hover .cxb-b2b-dl-button .cxb-b2b-dl-icon {
        transform: none;
    }
}

@media print {
    .cxb-b2b-dl .cxb-b2b-dl-actions {
        display: none;
    }
    .cxb-b2b-dl .cxb-b2b-dl-item {
        break-inside: avoid;
    }
}

/* ---- 主题隔离：链接 ---- */
.cxb-b2b-dl a.cxb-b2b-dl-preview,
.cxb-b2b-dl a.cxb-b2b-dl-button,
.cxb-b2b-dl a.cxb-b2b-dl-preview:hover,
.cxb-b2b-dl a.cxb-b2b-dl-button:hover,
.cxb-b2b-dl a.cxb-b2b-dl-preview:focus,
.cxb-b2b-dl a.cxb-b2b-dl-button:focus {
    box-shadow: none !important;
    text-decoration: none !important;
    text-transform: none !important;
    letter-spacing: normal !important;
}
.cxb-b2b-dl a.cxb-b2b-dl-button,
.cxb-b2b-dl a.cxb-b2b-dl-button:focus,
.cxb-b2b-dl a.cxb-b2b-dl-button:visited {
    color: var(--cxb-dl-accent-text) !important;
}
.cxb-b2b-dl .cxb-b2b-dl-item:hover a.cxb-b2b-dl-button,
.cxb-b2b-dl a.cxb-b2b-dl-button:hover,
.cxb-b2b-dl a.cxb-b2b-dl-button:focus-visible {
    color: #ffffff !important;
}
.cxb-b2b-dl a.cxb-b2b-dl-preview,
.cxb-b2b-dl a.cxb-b2b-dl-preview:hover,
.cxb-b2b-dl a.cxb-b2b-dl-preview:focus,
.cxb-b2b-dl a.cxb-b2b-dl-preview:visited {
    color: var(--cxb-dl-ink) !important;
}