/* =========================================
   全局基础样式
   ========================================= */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f8f9fa; /* 浅灰背景，护眼 */
    color: #333;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* 链接去下划线，悬停时显示 */
a {
    text-decoration: none;
    color: #0d6efd;
}
a:hover {
    text-decoration: underline;
}

/* =========================================
   导航栏优化
   ========================================= */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.08); /* 底部投影，增加层次感 */
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: 0.5px;
}

/* =========================================
   首页文章列表卡片
   ========================================= */
.card {
    border: none;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* 鼠标悬停时卡片轻轻上浮 */
.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.card-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-title a {
    color: #2c3e50;
    transition: color 0.2s;
}

.card-title a:hover {
    color: #0d6efd;
    text-decoration: none;
}

/* =========================================
   文章详情页 & Markdown 排版
   (关键：让Markdown解析后的HTML好看)
   ========================================= */
.markdown-body {
    font-size: 1.05rem; /* 稍微大一点的字号，阅读更舒服 */
    line-height: 1.8;
    color: #2c3e50;
    word-wrap: break-word; /* 防止长单词撑破手机屏幕 */
}

/* 1. 图片自适应：手机端最关键的样式 */
.markdown-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    display: block;
}

/* 2. 标题间距 */
.markdown-body h1, 
.markdown-body h2, 
.markdown-body h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 700;
    color: #212529;
    line-height: 1.3;
}

.markdown-body h1 { font-size: 2rem; border-bottom: 1px solid #eee; padding-bottom: 0.3rem; }
.markdown-body h2 { font-size: 1.75rem; }
.markdown-body h3 { font-size: 1.5rem; }

/* 3. 引用块样式 */
.markdown-body blockquote {
    border-left: 5px solid #0d6efd;
    background-color: #f1f3f5;
    padding: 1rem 1.2rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
    color: #555;
    font-style: italic;
}

/* 4. 代码块样式 */
.markdown-body pre {
    background: #282c34;
    color: #abb2bf;
    padding: 1.2rem;
    border-radius: 8px;
    overflow-x: auto; /* 代码过长允许横向滚动 */
    font-family: Consolas, Monaco, "Andale Mono", monospace;
    font-size: 0.9rem;
    margin: 1.5rem 0;
}

/* 行内代码 code */
.markdown-body code {
    background-color: rgba(27,31,35,0.05);
    color: #d63384; /* 醒目的粉色 */
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-size: 0.9em;
    font-family: Consolas, monospace;
}

/* 5. 列表间距 */
.markdown-body ul, .markdown-body ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}
.markdown-body li {
    margin-bottom: 0.5rem;
}

/* =========================================
   登录页微调
   ========================================= */
.login-card {
    margin-top: 3rem;
    border: none;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}