/* ========== 🆕 顶部补丁：强制修复背景变白 ========== */
/* 这里的 !important 是为了覆盖 Layui 等框架的默认白色样式 */
body {
    background-color: var(--bg-dark) !important; 
}

/* 确保 tutorials 页面继承全局的透明设定 */
.content-area {
    background-color: transparent !important; 
}


/* --- 基础容器 --- */
.tutorial-wrapper {
    max-width: 1400px; 
    margin: 0 auto;
    padding: 30px; 
    min-height: 100vh;
    
    /* 🆕 核心修改：显式透明，让底部的黑色透出来 */
    background-color: transparent; 
}

/* --- 主体布局 (PC) --- */
.tutorial-body {
    display: flex;
    gap: 30px;
    position: relative;
    align-items: flex-start; 
}

/* --- 左侧侧边栏 (PC) --- */
.tutorial-sidebar {
    width: 280px;
    flex-shrink: 0;
    background: #1e2025;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    overflow: hidden;
    
    /* 粘性定位 */
    position: -webkit-sticky;
    position: sticky;
    top: 30px; 
    max-height: calc(100vh - 60px); 
    display: flex;
    flex-direction: column;
}

.list-header {
    padding: 15px 20px;
    font-weight: 700;
    font-size: 14px;
    color: #fff;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.tutorial-list {
    list-style: none;
    padding: 10px;
    overflow-y: auto; 
    margin: 0;
}

.tutorial-list::-webkit-scrollbar {
    width: 4px;
}
.tutorial-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.tutorial-item {
    padding: 12px 15px;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 4px;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.tutorial-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.tutorial-item.active {
    background: rgba(114, 137, 218, 0.15); 
    border-color: rgba(114, 137, 218, 0.3);
    color: #7289da;
}

.tutorial-item .item-title {
    font-weight: 600;
    font-size: 14px;
    line-height: 1.4;
}

.tutorial-item .item-desc {
    font-size: 12px;
    opacity: 0.6;
    margin-top: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 1; 
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* --- 右侧内容区 --- */
.tutorial-content-area {
    flex: 1;
    min-width: 0; 
    background: #1e2025;
    border-radius: 12px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.tutorial-article.hidden {
    display: none;
}

.article-meta {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 25px;
    margin-bottom: 25px;
}

.article-title {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 15px;
    line-height: 1.3;
}

.article-info {
    display: flex;
    gap: 15px;
}

.article-info .badge {
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    color: #8a94a6;
    display: flex;
    align-items: center;
    gap: 6px;
}

.cover-wrapper {
    margin-top: 20px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}

.article-cover {
    width: 100%;
    display: block;
    object-fit: cover;
}

/* Markdown 样式 */
.markdown-body {
    background: transparent !important;
    font-family: inherit !important;
    color: #d0d0d0 !important;
    font-size: 16px;
    line-height: 1.8;
}
.markdown-body h1, .markdown-body h2 {
    border-bottom-color: rgba(255,255,255,0.1) !important;
}
.markdown-body pre {
    background-color: #16181c !important;
    border-radius: 8px;
}

/* --- 移动端适配 (修改重点) --- */
@media (max-width: 768px) {
    .tutorial-wrapper {
        padding: 15px;
        height: auto;
    }

    .tutorial-body {
        flex-direction: column; 
        gap: 15px;
    }

    /* 侧边栏容器 */
    .tutorial-sidebar {
        width: 100%;
        position: static; 
        max-height: none;
        border-radius: 12px;
        background: #1e2025;
    }

    /* 列表变为横向滚动条 */
    .tutorial-list {
        display: flex; 
        flex-direction: row;
        overflow-x: auto; 
        padding: 10px;
        gap: 8px;
        -webkit-overflow-scrolling: touch; 
        /* 隐藏滚动条但保留功能 */
        scrollbar-width: none; /* Firefox */
    }
    .tutorial-list::-webkit-scrollbar {
        display: none; /* Chrome/Safari */
    }

    /* 单个项目样式调整 */
    .tutorial-item {
        flex-shrink: 0;     /* 防止被压缩 */
        width: auto;        /* ★ 关键：根据内容自动宽度 */
        max-width: none;    /* ★ 关键：移除最大宽度限制 */
        min-width: auto;    /* 移除最小宽度限制，更紧凑 */
        
        white-space: nowrap; /* ★ 关键：强制一行显示 */
        
        margin-bottom: 0;
        background: rgba(255,255,255,0.05);
        border: 1px solid rgba(255,255,255,0.05);
        padding: 8px 16px;   /* 调整内边距，像胶囊按钮一样 */
    }

    /* 隐藏描述，只留标题 */
    .tutorial-item .item-desc {
        display: none; 
    }
    
    .tutorial-item .item-title {
        font-size: 13px; /* 稍微调小一点字体，更精致 */
    }

    .tutorial-item.active {
        background: #7289da;
        color: #fff;
        border-color: #7289da;
    }

    /* 右侧内容区适配 */
    .tutorial-content-area {
        padding: 20px;
        border-radius: 12px;
        overflow: visible; 
    }
    
    .article-title {
        font-size: 1.5rem;
    }
}