@namespace atom url("http://www.w3.org/2005/Atom");
@namespace content url("http://purl.org/rss/1.0/modules/content/");
@namespace dc url("http://purl.org/dc/elements/1.1/");

:root {
    --bg-color: #f4f5f7;
    --card-bg: #ffffff;
    --text-main: #222;
    --text-muted: #555;
    --text-light: #888;
    --max-width: 780px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1c;
        --card-bg: #2c2c2e;
        --text-main: #e5e5e7;
        --text-muted: #a1a1a6;
        --text-light: #707074;
    }
}

body,
rss,
atom|feed {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg-color);
    color: var(--text-main);
    margin: 0px auto;
    padding: 2rem 1rem;
    font-size: 16px;
    line-height: 1.6;
    max-width: var(--max-width);
}

channel>title,
atom|feed>atom|title {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin: 0px 0px 0.5rem;
    letter-spacing: -0.02em;
}

item,
atom|entry {
    display: block;
    background: var(--card-bg);
    padding: 1.5rem;
    margin-bottom: 1.25rem;
    border-radius: 16px;
    box-shadow: rgba(0, 0, 0, 0.05) 0px 4px 20px;
    transition: transform 0.2s;
}

item:hover,
atom|entry:hover {
    transform: translateY(-2px);
}

item>title,
atom|entry>atom|title {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

item>description,
atom|entry>atom|summary {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    overflow: hidden;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

item>pubDate,
atom|entry>atom|updated {
    display: block;
    color: var(--text-light);
    font-size: 0.85rem;
    margin-top: 0.75rem;
}

link,
guid,
author,
category,
comments,
source,
enclosure,
content|encoded,
dc|creator,
atom|id,
atom|link,
atom|updated,
atom|published,
atom|author,
atom|category,
atom|rights,
atom|content,
language,
generator {
    display: none;
}

channel>description,
atom|feed>atom|subtitle {
    display: block;
    text-align: center;
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 2rem;
}

channel>description::after,
atom|feed>atom|subtitle::after {
    content: "这是一个订阅源（Feed）。复制当前URL到任何支持 Atom/RSS 的阅读器，即可订阅本博客的最新文章。\a 以下展示了此订阅源包含的最新文章：";
    display: block;
    white-space: pre-wrap;
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 1rem;
    padding: 1rem;
    border-top-width: 1px;
    border-top-style: solid;
    border-top-color: rgba(128, 128, 128, 0.2);
}

rss,
channel,
atom|feed {
    display: flex;
    flex-direction: column;
}

channel>lastBuildDate,
atom|feed>atom|updated:not(atom|entry atom|updated) {
    order: 999;
    text-align: center;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top-width: 1px;
    border-top-style: solid;
    border-top-color: rgba(128, 128, 128, 0.2);
    color: var(--text-light);
    font-size: 0.85rem;
    display: block !important;
}

channel>lastBuildDate::before,
atom|feed>atom|updated:not(atom|entry atom|updated)::before {
    content: "更新于 ";
}