/* --- 核心变量（全局统一） --- */
:root {
    --primary: #00FFC2; 
    --bg: #0D0D0D;      
    --card-bg: #1A1A1B; 
    --text: #E0E0E0;
    --text-dim: #999;
    --border: #222;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    background-color: var(--bg); 
    color: var(--text); 
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", sans-serif;
    line-height: 1.8;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: 0.3s; }
.container { width: 90%; max-width: 850px; margin: 0 auto; } /* 资讯阅读宽度：更窄更聚焦 */

/* --- 头部导航 (首页原版) --- */
header { padding: 15px 0; border-bottom: 1px solid #222; position: sticky; top: 0; background: rgba(13,13,13,0.9); backdrop-filter: blur(10px); z-index: 1000; }
nav { display: flex; justify-content: space-between; align-items: center; }
.logo svg { width: 130px; height: auto; vertical-align: middle; }
.nav-links { display: flex; gap: 25px; align-items: center; }
.nav-links a { font-size: 0.9rem; font-weight: 500; }
.nav-links a:hover { color: var(--primary); }

/* --- 文章标题区 --- */
.article-header { padding: 80px 0 40px; border-bottom: 1px solid var(--border); }
.breadcrumb { font-size: 0.8rem; color: var(--text-dim); margin-bottom: 20px; }
.breadcrumb a:hover { color: var(--primary); }

.article-header h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); font-weight: 800; line-height: 1.4; color: #fff; margin-bottom: 25px; }

.article-meta { display: flex; gap: 20px; font-size: 0.85rem; color: #666; align-items: center; }
.article-meta span { display: flex; align-items: center; gap: 5px; }
.category-tag { color: var(--primary); background: rgba(0,255,194,0.1); padding: 2px 8px; border-radius: 2px; }

/* --- 文章主体内容 --- */
.article-body { padding: 50px 0; }

/* 针对文章内图片、代码块、引用等元素的优化 */
.article-body p { margin-bottom: 25px; font-size: 1.05rem; color: #ccc; }
.article-body h2 { color: #fff; font-size: 1.6rem; margin: 45px 0 25px; display: flex; align-items: center; }
.article-body h2::before { content: ""; width: 4px; height: 18px; background: var(--primary); margin-right: 12px; }

.article-body img { width: 100%; border-radius: 8px; margin: 20px 0; border: 1px solid var(--border); }

/* 引用块样式 */
blockquote { border-left: 3px solid var(--primary); padding: 20px 30px; background: #141414; margin: 30px 0; font-style: italic; color: var(--text-dim); }

/* 代码块样式 */
pre { background: #000; padding: 20px; border-radius: 6px; overflow-x: auto; margin-bottom: 30px; border: 1px solid #222; font-family: 'Courier New', Courier, monospace; font-size: 0.9rem; color: var(--primary); }

/* --- 上下篇文章导航 --- */
.post-nav { display: flex; justify-content: space-between; border-top: 1px solid var(--border); padding-top: 40px; margin-top: 40px; gap: 20px; }
.nav-item { flex: 1; padding: 20px; background: var(--card-bg); border-radius: 4px; border: 1px solid var(--border); transition: 0.3s; }
.nav-item:hover { border-color: var(--primary); }
.nav-item span { display: block; font-size: 0.75rem; color: var(--text-dim); margin-bottom: 8px; }
.nav-item p { font-size: 0.9rem; font-weight: bold; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* --- 底部 (首页原版) --- */
footer { padding: 80px 0 40px; border-top: 1px solid #222; margin-top: 100px; background: #0a0a0a; }
.footer-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 40px; margin-bottom: 50px; }
.footer-links h5 { color: var(--primary); margin-bottom: 20px; font-size: 1rem; }
.links-wrap { display: flex; gap: 30px; }
.links-wrap a { color: var(--text-dim); font-size: 0.85rem; }
.links-wrap a:hover { color: var(--primary); }
.copyright { border-top: 1px solid #1a1a1a; text-align: center; font-size: 0.8rem; color: #555; padding-top: 30px; }

/* --- 响应式适配 --- */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .article-header { padding: 50px 0 30px; }
    .post-nav { flex-direction: column; }
    .footer-top { flex-direction: column; text-align: center; }
    .links-wrap { justify-content: center; flex-wrap: wrap; }
}