/*
文件：static/css/blog-list.css
作用：博客列表页专用样式（含 3 套 demo：A 紧凑列表 / B 长卡竖排 / C 方卡网格）
解决什么问题：实现 demo 切换器驱动的 3 种视觉风格，方便对比决策
创建：2026-09-12
作者：大军 + 小军
注：V1 上线前删除 ?blog_style 切换相关代码 + blog-demo.js + 本文件中 B/A demo 样式
*/

/* ============ 英雄区 ============ */
.blog-hero {
    background: var(--color-bg-secondary);
    padding: 80px 0 48px;
    border-bottom: 1px solid var(--color-border);
}
.blog-hero-content {
    max-width: 640px;
}
.blog-hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}
.blog-hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============ 列表头 ============ */
.blog-list-section {
    padding: 48px 0 80px;
}
.blog-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
}
.blog-section-title-group {
    display: flex;
    align-items: baseline;
    gap: 12px;
}
.blog-section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
}
.blog-post-count {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ============ Demo 切换器 ============ */
.blog-demo-switcher {
    display: inline-flex;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 4px;
    gap: 4px;
}
.blog-demo-btn {
    background: transparent;
    border: none;
    padding: 6px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.15s ease;
    font-family: inherit;
}
.blog-demo-btn:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
}
.blog-demo-btn[aria-selected="true"] {
    color: #fff;
    background: var(--color-accent);
}

/* ============ 列表容器 ============ */
.blog-list {
    display: grid;
    gap: 20px;
}

/* ============ 分类标签（6 色共用） ============ */
.blog-tag {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 4px;
    white-space: nowrap;
}
.blog-tag[data-color="efficiency"] { color: #0066cc; background: rgba(0,102,204,0.10); }
.blog-tag[data-color="environment"] { color: #228b22; background: rgba(34,139,34,0.10); }
.blog-tag[data-color="problem"] { color: #d97a00; background: rgba(217,122,0,0.12); }
.blog-tag[data-color="pitfall"] { color: #c91842; background: rgba(201,24,66,0.10); }
.blog-tag[data-color="thought"] { color: #7d22ce; background: rgba(138,43,226,0.10); }
.blog-tag[data-color="ai_creation"] { color: #e754a8; background: rgba(231,84,168,0.12); }

/* ============ 默认隐藏所有 item，只有激活样式才显示 ============ */
/* 这是关键修复：避免 3 种卡片同时渲染导致的"每篇 3 个卡"bug */
.blog-item-compact,
.blog-item-tall,
.blog-item-grid {
    display: none;
}

/* ============ C 模式：方卡网格（3 列，默认） ============ */
.blog-list[data-blog-style="C"] {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.blog-list[data-blog-style="C"] .blog-item-grid {
    display: flex;
    flex-direction: column;
    padding: 20px;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    /* transition：材质感曲线（Material Design standard easing） */
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                background 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    aspect-ratio: 1 / 1.2;
}
/* === C hover：上浮 + 阴影加深 + 背景淡渐变（按分类色）== */
.blog-item-grid:hover {
    transform: translateY(-4px);
    border-color: transparent;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
}
/* 按 6 分类色动态设置 hover 背景渐变（核心增强点） */
.blog-item-grid[data-cat="efficiency"]:hover  { background: linear-gradient(135deg, rgba(0,102,204,0.08) 0%, rgba(0,102,204,0.02) 100%); }
.blog-item-grid[data-cat="environment"]:hover { background: linear-gradient(135deg, rgba(34,139,34,0.08) 0%, rgba(34,139,34,0.02) 100%); }
.blog-item-grid[data-cat="problem"]:hover      { background: linear-gradient(135deg, rgba(217,122,0,0.10) 0%, rgba(217,122,0,0.03) 100%); }
.blog-item-grid[data-cat="pitfall"]:hover      { background: linear-gradient(135deg, rgba(201,24,66,0.08) 0%, rgba(201,24,66,0.02) 100%); }
.blog-item-grid[data-cat="thought"]:hover      { background: linear-gradient(135deg, rgba(138,43,226,0.08) 0%, rgba(138,43,226,0.02) 100%); }
.blog-item-grid[data-cat="ai_creation"]:hover  { background: linear-gradient(135deg, rgba(231,84,168,0.10) 0%, rgba(231,84,168,0.03) 100%); }
/* hover 时标题变色 + 箭头滑动 */
.blog-item-grid:hover .blog-item-title-grid {
    color: var(--color-accent);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.blog-item-arrow-grid {
    font-size: 0.875rem;
    color: var(--color-accent);
    font-weight: 500;
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.blog-item-grid:hover .blog-item-arrow-grid {
    transform: translateX(4px);
}
.blog-item-title-grid {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 12px 0 8px;
    line-height: 1.4;
}
.blog-item-excerpt-grid {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 5;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: normal;
}
.blog-item-meta-grid {
    display: flex;
    gap: 8px;
    align-items: center;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}
.blog-item-date-grid::after {
    content: "·";
    margin-left: 8px;
}
.blog-item-arrow-grid {
    font-size: 0.875rem;
    color: var(--color-accent);
    font-weight: 500;
}

/* ============ 模式 A：紧凑列表（单列横排） ============ */
.blog-list[data-blog-style="A"] {
    grid-template-columns: 1fr;
    gap: 12px;
}
.blog-list[data-blog-style="A"] .blog-item-compact {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 20px;
    align-items: center;
    min-height: 88px;  /* 🆕 2026-09-21: A 模式紧凑固定高度，容纳标题 ≤2 行 + 摘要 ≤2 行 */
    padding: 16px 20px;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                background 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}
/* === A hover：左侧出现 4px 色条 + 背景变浅色 === */
.blog-item-compact::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--cat-color, var(--color-accent));
    transform: scaleY(0);
    transform-origin: center;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.blog-item-compact:hover {
    transform: translateX(2px);
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    padding-left: 20px;
}
.blog-item-compact:hover::before {
    transform: scaleY(1);
}
.blog-item-compact[data-cat="efficiency"]  { --cat-color: #0066cc; }
.blog-item-compact[data-cat="environment"] { --cat-color: #228b22; }
.blog-item-compact[data-cat="problem"]      { --cat-color: #d97a00; }
.blog-item-compact[data-cat="pitfall"]      { --cat-color: #c91842; }
.blog-item-compact[data-cat="thought"]      { --cat-color: #7d22ce; }
.blog-item-compact[data-cat="ai_creation"]  { --cat-color: #e754a8; }
/* hover 时背景渐变 + 标题变色 */
.blog-item-compact[data-cat="efficiency"]:hover  { background: linear-gradient(90deg, rgba(0,102,204,0.06) 0%, rgba(0,102,204,0.01) 100%); }
.blog-item-compact[data-cat="environment"]:hover { background: linear-gradient(90deg, rgba(34,139,34,0.06) 0%, rgba(34,139,34,0.01) 100%); }
.blog-item-compact[data-cat="problem"]:hover      { background: linear-gradient(90deg, rgba(217,122,0,0.08) 0%, rgba(217,122,0,0.02) 100%); }
.blog-item-compact[data-cat="pitfall"]:hover      { background: linear-gradient(90deg, rgba(201,24,66,0.06) 0%, rgba(201,24,66,0.01) 100%); }
.blog-item-compact[data-cat="thought"]:hover      { background: linear-gradient(90deg, rgba(138,43,226,0.06) 0%, rgba(138,43,226,0.01) 100%); }
.blog-item-compact[data-cat="ai_creation"]:hover  { background: linear-gradient(90deg, rgba(231,84,168,0.08) 0%, rgba(231,84,168,0.02) 100%); }
.blog-item-compact:hover .blog-item-title-compact {
    color: var(--cat-color, var(--color-accent));
}
.blog-item-arrow {
    color: var(--color-accent);
    font-weight: 500;
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.blog-item-compact:hover .blog-item-arrow {
    transform: translateX(6px);
}
.blog-item-main {
    min-width: 0;  /* 防止 grid item 内容溢出 */
}
.blog-item-title-compact {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0 0 4px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: clip;
}
.blog-item-excerpt-compact {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: normal;
}
.blog-item-meta-compact {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}
.blog-item-arrow {
    color: var(--color-accent);
    font-weight: 500;
}

/* ============ 模式 B：长卡竖排（单列大卡） ============ */
.blog-list[data-blog-style="B"] {
    grid-template-columns: 1fr;
    gap: 16px;
}
.blog-list[data-blog-style="B"] .blog-item-tall {
    display: flex;
    flex-direction: column;
    padding: 28px;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                background 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}
/* === B hover：左侧色条 + 大幅上浮 + 阴影加强 === */
.blog-item-tall::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 6px;
    background: var(--cat-color, var(--color-accent));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.blog-item-tall:hover {
    transform: translateY(-6px);
    border-color: transparent;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.10), 0 4px 8px rgba(0, 0, 0, 0.04);
}
.blog-item-tall:hover::before {
    transform: scaleY(1);
}
.blog-item-tall[data-cat="efficiency"]  { --cat-color: #0066cc; }
.blog-item-tall[data-cat="environment"] { --cat-color: #228b22; }
.blog-item-tall[data-cat="problem"]      { --cat-color: #d97a00; }
.blog-item-tall[data-cat="pitfall"]      { --cat-color: #c91842; }
.blog-item-tall[data-cat="thought"]      { --cat-color: #7d22ce; }
.blog-item-tall[data-cat="ai_creation"]  { --cat-color: #e754a8; }
/* hover 背景渐变 */
.blog-item-tall[data-cat="efficiency"]:hover  { background: linear-gradient(135deg, rgba(0,102,204,0.08) 0%, rgba(0,102,204,0.02) 100%); }
.blog-item-tall[data-cat="environment"]:hover { background: linear-gradient(135deg, rgba(34,139,34,0.08) 0%, rgba(34,139,34,0.02) 100%); }
.blog-item-tall[data-cat="problem"]:hover      { background: linear-gradient(135deg, rgba(217,122,0,0.10) 0%, rgba(217,122,0,0.03) 100%); }
.blog-item-tall[data-cat="pitfall"]:hover      { background: linear-gradient(135deg, rgba(201,24,66,0.08) 0%, rgba(201,24,66,0.02) 100%); }
.blog-item-tall[data-cat="thought"]:hover      { background: linear-gradient(135deg, rgba(138,43,226,0.08) 0%, rgba(138,43,226,0.02) 100%); }
.blog-item-tall[data-cat="ai_creation"]:hover  { background: linear-gradient(135deg, rgba(231,84,168,0.10) 0%, rgba(231,84,168,0.03) 100%); }
.blog-item-tall:hover .blog-item-title-tall {
    color: var(--cat-color, var(--color-accent));
}
.blog-item-tall-footer .blog-item-arrow {
    font-size: 0.875rem;
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.blog-item-tall:hover .blog-item-arrow {
    transform: translateX(6px);
}
.blog-item-tall-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.blog-item-date-tall {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}
.blog-item-title-tall {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin: 0 0 12px;
    line-height: 1.3;
}
.blog-item-excerpt-tall {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 10;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: normal;
}
.blog-item-tall-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}
.blog-item-author-tall {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}
.blog-item-tall-footer .blog-item-arrow {
    font-size: 0.875rem;
}

/* ============ 空状态 ============ */
.blog-empty-state {
    color: var(--color-text-secondary);
    font-size: 1rem;
    padding: 48px 0;
    text-align: center;
    grid-column: 1 / -1;
}

/* ============ 分页 ============ */
.blog-pagination {
    margin-top: 48px;
    display: flex;
    justify-content: center;
}
.blog-pagination-list {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
    padding: 0;
    margin: 0;
}
.blog-pagination-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    text-decoration: none;
    transition: all 0.15s ease;
}
.blog-pagination-link:hover:not(.blog-pagination-disabled):not(.blog-pagination-current) {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-accent-bg);
}
.blog-pagination-current {
    color: #fff;
    background: var(--color-accent);
    border-color: var(--color-accent);
    cursor: default;
}
.blog-pagination-disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ============ 响应式 ============ */
@media (max-width: 992px) {
    .blog-list[data-blog-style="C"] { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .blog-hero { padding: 48px 0 32px; }
    .blog-hero-title { font-size: 1.875rem; }
    .blog-list-section { padding: 32px 0 48px; }
    .blog-list[data-blog-style="C"] { grid-template-columns: 1fr; }
    .blog-section-header { flex-direction: column; align-items: flex-start; }

    /* === A 列表手机端：极简紧凑型 ===
       布局：分类竖排（每字一行） | 标题 + 摘要（主区） | meta（右下单行）
       目标：压缩垂直高度，让标题摘要占主区域
    */
    .blog-list[data-blog-style="A"] {
        gap: 6px;
    }
    .blog-list[data-blog-style="A"] .blog-item-compact {
        grid-template-columns: 20px 1fr;  /* 分类仅占 20px（汉字列宽） */
        grid-template-areas:
            "tag main"
            "tag meta";
        gap: 4px 10px;
        padding: 8px 10px;
        min-height: 80px;  /* 🆕 2026-09-21: mobile A 模式紧凑固定高度 */
        align-items: start;
    }
    .blog-list[data-blog-style="A"] .blog-tag-compact {
        grid-area: tag;
        align-self: start;
        justify-self: center;
        font-size: 0.625rem;
        padding: 2px 0;
        line-height: 1.1;
        max-width: 20px;
        word-break: break-all;
        white-space: normal;
        text-align: center;
        letter-spacing: 0;
    }
    .blog-list[data-blog-style="A"] .blog-item-main {
        grid-area: main;
        min-width: 0;
    }
    .blog-list[data-blog-style="A"] .blog-item-meta-compact {
        grid-area: meta;
        justify-self: end;
        align-self: end;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 6px;
        font-size: 0.6875rem;
        color: var(--color-text-secondary);
        white-space: nowrap;
    }
    .blog-list[data-blog-style="A"] .blog-item-meta-compact .blog-item-date-compact,
    .blog-list[data-blog-style="A"] .blog-item-meta-compact .blog-item-author-compact {
        font-size: 0.6875rem;
        color: var(--color-text-secondary);
    }
    .blog-list[data-blog-style="A"] .blog-item-meta-compact .blog-item-date-compact::after {
        content: "·";
        margin-left: 6px;
    }
    .blog-list[data-blog-style="A"] .blog-item-meta-compact .blog-item-arrow {
        font-size: 0.875rem;
        margin-left: 4px;
    }
    /* 移动端标题与摘要：允许完整换行 */
    .blog-list[data-blog-style="A"] .blog-item-title-compact,
    .blog-list[data-blog-style="A"] .blog-item-excerpt-compact {
        white-space: normal;
        overflow: hidden;
        text-overflow: clip;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
    }
    /* 标题：2行，无省略号 */
    .blog-list[data-blog-style="A"] .blog-item-title-compact {
        text-overflow: clip;
    }
    /* 摘要：2行，有省略号 */
    .blog-list[data-blog-style="A"] .blog-item-excerpt-compact {
        text-overflow: ellipsis;
    }
    .blog-list[data-blog-style="A"] .blog-item-title-compact {
        font-size: 0.9375rem;
        line-height: 1.4;
        font-weight: 600;
    }
    .blog-list[data-blog-style="A"] .blog-item-excerpt-compact {
        font-size: 0.8125rem;
        line-height: 1.5;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-top: 2px;
    }
    /* 移动端不色 bar（保持简洁）*/
    .blog-list[data-blog-style="A"] .blog-item-compact::before,
    .blog-list[data-blog-style="A"] .blog-item-compact:hover::before {
        display: none;
    }
    /* 移动端 hover：减弱动画但保留反馈 */
    .blog-list[data-blog-style="A"] .blog-item-compact:hover {
        transform: none;
        padding-left: 12px;
        background: var(--color-accent-bg);
    }
    .blog-list[data-blog-style="A"] .blog-item-compact:hover .blog-item-title-compact {
        color: var(--cat-color, var(--color-accent));
    }
}

/* ============ 摘要内嵌样式（方案 C · 2026-09-21）============
   excerpt 现在输出 <strong>/<code>/<a> 三种 HTML，需要样式
*/
.blog-item-excerpt-compact code,
.blog-item-excerpt-tall code,
.blog-item-excerpt-grid code {
    background: var(--color-bg-secondary);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.9em;
    font-family: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;
    color: #c7254e;
    word-break: break-all;
}
.blog-item-excerpt-compact a,
.blog-item-excerpt-tall a,
.blog-item-excerpt-grid a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px dotted var(--color-accent);
}
.blog-item-excerpt-compact a:hover,
.blog-item-excerpt-tall a:hover,
.blog-item-excerpt-grid a:hover {
    color: var(--color-accent-hover, var(--color-accent));
    border-bottom-style: solid;
}