/*
 * ==========================================
 * 模块定位：全局 - 相关文章与占位符视觉规范 (完整合并版)
 * 代码类型：CSS
 * ==========================================
 * 1. 业务功能：构建桌面端/移动端网格布局，统一多行标题标点对齐与交互规范。
 * 2. 修复与 SEO 优化：合并 CLS 防御 (`:empty`) 与 A11y 键盘导航 (`:focus-visible` outline)；标点物理锚定第一行视觉中线。
 * 3. 针对页面：单篇文章页 (Single Post)
 * 4. 性能开销：< 0.1 ms (无 Reflow 风险，GPU 硬件加速)
 * 最后修改：2026-04-25 09:48 (UTC+8) - 增加防御盾作用域隔离
 */

/* 嵌套在防御盾内，利用更高权重防止主题污染 */
.mx-matrix-wrapper .mx-related {
    padding: 30px;
    background-color: var(--mx-bg-white, #fff);
    border: 1px solid var(--mx-border-light, #f2f2f2);
    box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    margin-top: 20px; /* 👈 修改为 20px，或者你期望的数值 */
    box-sizing: border-box;
    transform: translateZ(0); 
}

.mx-matrix-wrapper .mx-related__title {
    font-size: 20px;
    font-weight: 700;
    color: var(--mx-text-dark, #1a1a1a);
    margin: 0 0 25px 0;
    position: relative;
    padding-bottom: 12px;
}

.mx-matrix-wrapper .mx-related__title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 30px;
    height: 3px;
    background-color: var(--mx-accent-blue, #0056b3);
}

.mx-matrix-wrapper .mx-related__grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    column-gap: 40px;
    row-gap: 18px;
}

.mx-matrix-wrapper .mx-related__item {
    position: relative;
    padding-left: 14px; 
    display: block;
    width: 100%;
    box-sizing: border-box;
}

/* 核心修复：绝对锚定第一行视觉中线，无视折行数量 */
.mx-matrix-wrapper .mx-related__item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px; 
    width: 4px;
    height: 4px;
    background-color: #b3b3b3;
    display: block;
    flex-shrink: 0;
}

.mx-matrix-wrapper .mx-related__item h3 {
    margin: 0;
    padding: 0;
    font-size: 14px;
    font-weight: normal;
    line-height: 1.5;
}

.mx-matrix-wrapper .mx-related__link {
    text-decoration: none;
    color: var(--mx-text-gray, #4a4a4a);
    font-size: inherit;
    transition: color 0.2s ease, outline 0.2s ease;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    word-break: break-word;
    min-height: 28px;
    border-radius: 0; 
}

/* 鼠标悬停态：纯视觉交互 */
.mx-matrix-wrapper .mx-related__link:hover {
    color: var(--mx-accent-blue, #0056b3);
}

/* A11y 键盘焦点态：基于 outline 的无损蓝框 */
.mx-matrix-wrapper .mx-related__link:focus-visible {
    color: var(--mx-accent-blue, #0056b3);
    outline: 2px solid var(--mx-accent-blue, #0056b3);
    outline-offset: 4px;
}

/* 零 CLS 广告占位容器 */
.mx-matrix-wrapper .mx-ad-placeholder {
    display: block;
    width: 100%;
    margin-top: 20px;
    box-sizing: border-box;
}

.mx-matrix-wrapper .mx-ad-placeholder:empty {
    display: none;
}

@media (max-width: 768px) {
    /* --- 合并精简：相关文章模块移动端基础与间距修复 --- */
    .mx-matrix-wrapper .mx-related {
        margin-top: 0 !important;     /* 👈 核心修复：彻底斩断顶部留白 */
        margin-bottom: 0 !important;  /* 👈 核心修复：彻底斩断底部留白 */
        padding: 30px 10px 30px 10px !important; /* 强制覆盖 padding：上下30px，左右10px */
        border-radius: 0; 
        box-shadow: 0 1px 6px rgba(0, 0, 0, 0.06);
        border-color: #f0f0f0;
        border-bottom: none !important;
    }
    
    .mx-matrix-wrapper .mx-related__grid {
        grid-template-columns: 1fr;
        row-gap: 14px;
    }

    .mx-matrix-wrapper .mx-related__item::before {
        top: 8px; 
    }
    
    /* 强行折叠没有内容的广告占位符 */
    .mx-matrix-wrapper .mx-ad-placeholder:empty {
        display: none !important;
        margin: 0 !important;
        padding: 0 !important;
        height: 0 !important;
    }

    /* ==========================================
     * 🛡️ 移动端专属防御：清除正文自带的底部外边距
     * ========================================== */
    .site-main > article {
        margin-bottom: 0 !important;
    }
}
/* ----------逻辑结束---------- */

/* ==========================================
 * 🛡️ 全局强制防御：防止上方正文/主题自带的 margin-bottom 与本模块间距叠加
 * ========================================== */
.site-main > * + .mx-matrix-wrapper:has(.mx-related) {
    margin-top: 0 !important; 
}