/* 双栏布局 */
.two-column-layout{
    display: grid;
    grid-template-columns: 1fr 310px;
    gap: 36px;
    align-items: start;
    box-sizing: border-box;
}
.sidebar{
    position: -webkit-sticky;
    position: sticky;
    top: 90px;
    width: 310px;
    box-sizing: border-box;
}
.sidebar-inner{
    max-height: calc(100vh - 110px);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 22px;
    scrollbar-width: none;
}
.sidebar-inner::-webkit-scrollbar{
    display: none;
}

.sidebar-card{
    background: var(--card);
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 20px;
    box-sizing: border-box;
}
.sidebar-title{
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 14px;
    padding-left: 12px;
    border-left: 3px solid var(--btn-bg);
    color: var(--title);
}

/* 面包屑 */
.section-title{
    margin-top: 28px;
    margin-bottom: 24px;
}
.section-title a{
    text-decoration: none;
    color: var(--title);
}
.section-title{
    color: var(--muted);
}

/* 侧边热门文章列表 */
.hot-list{
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: hotIndex;
}
.hot-list li{
    counter-increment: hotIndex;
    margin-bottom: 10px;
    position: relative;
    padding-left: 24px;
    line-height: 1.55;
}
.hot-list li::before{
    content: counter(hotIndex) ".";
    position: absolute;
    left: 0;
    top: 0;
    color: #888;
    font-size: 14px;
}
.hot-list a{
    font-size: 14px;
    color: var(--muted);
    text-decoration: none;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: 0.22s ease;
}
.hot-list a:hover{
    color: var(--btn-bg);
}

/* 标签云 */
.tag-cloud{
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
}
.tag-item{
    font-size: 13px;
    padding: 5px 12px;
    background: var(--tag-bg);
    color: var(--tag-text);
    border-radius: 7px;
    text-decoration: none !important;
    transition: 0.22s ease;
}
.tag-item:hover{
    background: var(--btn-bg);
    color: #fff;
}

/* 广告区域 */
.ad-area p{
    text-align:center;
    color:var(--muted);
    line-height:140px;
    margin:0;
}

/* 文章主体卡片 */
.article-box{
    background: var(--card);
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 32px;
    box-shadow: var(--shadow);
}
.article-title{
    font-size: 26px;
    color: var(--title);
    line-height: 1.4;
    margin-bottom: 12px;
}
.article-meta{
    display: flex;
    flex-wrap: wrap;
    gap:12px;
    align-items:center;
    margin-bottom:24px;
    padding-bottom:16px;
    border-bottom:1px solid var(--border);
}
.article-meta .tag{
    display: inline-block;
    padding: 2px 8px;
    background: var(--tag-bg);
    color: var(--tag-text);
    border-radius: 4px;
    font-size: 12px;
    text-decoration: none !important;
}
.article-meta .time{
    font-size:13px;
    color:var(--muted);
}

/* 正文排版 */
.article-content{
    color:var(--text);
    line-height:1.85;
    font-size:16px;
}
.article-content p{
    margin-bottom:16px;
}
.article-content img{
    max-width:100%;
    border-radius:8px;
    margin:12px auto;
    display:block;
}
.article-content h2,.article-content h3{
    margin:24px 0 12px;
    color:var(--title);
}

/* 上下篇导航 PC横向并排 */
.prev-next{
    margin-top: 24px;
    display: flex;
    gap: 12px;
}
.prev-next a{
    flex: 1;
    display:block;
    padding:14px 16px;
    background:var(--card);
    border:1px solid var(--border);
    border-radius:10px;
    color:var(--muted);
    text-decoration:none;
    transition:0.2s;
}
.prev-next a:hover{
    border-color:var(--btn-bg);
    color:var(--btn-bg);
}

/* 相关阅读间距 */
.relative-box {
    margin-top: 40px;
}

/* 移动端适配 */
@media(max-width: 1024px){
    .two-column-layout{
        grid-template-columns: 1fr;
    }
    .sidebar{
        display: none;
    }
    .article-box{
        padding:20px;
    }
    .article-title{
        font-size:22px;
    }
    /* 移动端上下篇垂直排列 */
    .prev-next{
        flex-direction:column;
    }
}