/* ============ Rhycwu 静态站样式 ============ */
:root {
  --bg: #f7f6f3;
  --bg-card: #ffffff;
  --bg-soft: #efece6;
  --text: #2b2a26;
  --text-sub: #8a867c;
  --line: #e6e2d9;
  --accent: #3e7c6f;
  --accent-soft: rgba(62, 124, 111, .1);
  --shadow: 0 1px 3px rgba(40, 38, 32, .06), 0 6px 24px rgba(40, 38, 32, .05);
  --radius: 14px;
  --max-w: 760px;
}
html[data-theme="dark"] {
  --bg: #17181a;
  --bg-card: #212326;
  --bg-soft: #2a2c30;
  --text: #e8e6e1;
  --text-sub: #93908a;
  --line: #33363b;
  --accent: #6fb3a4;
  --accent-soft: rgba(111, 179, 164, .12);
  --shadow: 0 1px 3px rgba(0,0,0,.3), 0 6px 24px rgba(0,0,0,.25);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  transition: background .25s, color .25s;
}
a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; }
.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 18px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand-avatar {
  width: 38px; height: 38px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #8fb));
  color: #fff; font-weight: 700; font-size: 18px;
  display: grid; place-items: center;
  box-shadow: var(--shadow);
  overflow: hidden; flex: none;
}
.brand-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: inherit; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 17px; }
.brand-text small { color: var(--text-sub); font-size: 11px; }
.site-nav { margin-left: auto; display: flex; gap: 4px; }
.site-nav a {
  color: var(--text-sub); padding: 7px 14px; border-radius: 10px;
  font-size: 14.5px; transition: all .18s;
}
.site-nav a:hover { color: var(--text); background: var(--bg-soft); }
.site-nav a.active { color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.icon-btn {
  border: 1px solid var(--line); background: var(--bg-card); color: var(--text);
  width: 36px; height: 36px; border-radius: 10px; cursor: pointer; font-size: 15px;
  transition: transform .15s;
}
.icon-btn:hover { transform: scale(1.08); }

/* ---------- 首页 hero ---------- */
.hero { padding: 44px 0 8px; }
.hero h1 { font-size: 26px; margin: 0 0 6px; letter-spacing: .5px; }
.hero p { color: var(--text-sub); margin: 0; font-size: 14.5px; }
.search-box {
  margin: 18px 0 6px; display: flex; align-items: center; gap: 8px;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 12px;
  padding: 10px 14px; box-shadow: var(--shadow);
}
.search-box input {
  flex: 1; border: none; outline: none; background: transparent;
  color: var(--text); font-size: 14.5px;
}
.search-box .hint { color: var(--text-sub); font-size: 12px; white-space: nowrap; }

/* ---------- 文章列表 ---------- */
.post-list { display: flex; flex-direction: column; gap: 16px; margin: 22px 0 40px; }
.post-card {
  display: flex; gap: 18px; background: var(--bg-card);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; cursor: pointer; box-shadow: var(--shadow);
  transition: transform .18s, box-shadow .18s;
}
.post-card:hover { transform: translateY(-2px); box-shadow: 0 4px 8px rgba(40,38,32,.08), 0 12px 32px rgba(40,38,32,.09); }
.post-cover {
  width: 148px; height: 104px; flex: none; border-radius: 10px; overflow: hidden;
  background: var(--bg-soft);
}
.post-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.post-card-body { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.post-card h3 { margin: 2px 0 6px; font-size: 16.5px; line-height: 1.45; color: var(--text); }
.post-excerpt {
  color: var(--text-sub); font-size: 13.5px; margin: 0;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.post-meta { margin-top: auto; padding-top: 8px; display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-sub); }
.chip {
  background: var(--accent-soft); color: var(--accent);
  padding: 2px 9px; border-radius: 999px; font-size: 11.5px; font-weight: 600;
}
.empty-tip { text-align: center; color: var(--text-sub); padding: 60px 0; }

/* ---------- 文章页 ---------- */
.article-head { padding: 40px 0 20px; }
.back-link { font-size: 13.5px; color: var(--text-sub); cursor: pointer; display: inline-flex; align-items: center; gap: 4px; }
.back-link:hover { color: var(--accent); }
.article-head h1 { font-size: 25px; line-height: 1.4; margin: 12px 0 10px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 12.5px; color: var(--text-sub); }
.article {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px clamp(18px, 5vw, 44px); margin-bottom: 48px; box-shadow: var(--shadow);
}
.article img { border-radius: 10px; }
.article h1, .article h2, .article h3 { line-height: 1.45; margin: 1.6em 0 .6em; }
.article h2 { font-size: 20px; border-left: 4px solid var(--accent); padding-left: 12px; }
.article h3 { font-size: 17px; }
.article p { margin: .8em 0; overflow-wrap: break-word; }
.article blockquote {
  margin: 1em 0; padding: 10px 16px; border-left: 4px solid var(--accent);
  background: var(--accent-soft); border-radius: 0 10px 10px 0; color: var(--text-sub);
}
.article pre {
  background: #1e2127; color: #d5d8e0; padding: 16px 18px; border-radius: 10px;
  overflow-x: auto; font-size: 13px; line-height: 1.6;
}
.article code {
  font-family: "Cascadia Code", Consolas, "JetBrains Mono", monospace; font-size: .92em;
}
.article :not(pre) > code {
  background: var(--bg-soft); color: var(--text); padding: 2px 6px; border-radius: 6px;
}
.article table { border-collapse: collapse; width: 100%; margin: 1em 0; font-size: 13.5px; }
.article th, .article td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.article th { background: var(--bg-soft); }
.article a { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 瞬间时间线 ---------- */
.moments-wrap { margin: 30px 0 48px; position: relative; }
.moments-wrap::before {
  content: ""; position: absolute; left: 21px; top: 8px; bottom: 8px;
  width: 2px; background: var(--line); border-radius: 2px;
}
.moment-item { position: relative; padding: 0 0 22px 52px; }
.moment-dot {
  position: absolute; left: 12px; top: 4px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--accent-soft); border: 2px solid var(--accent);
  display: grid; place-items: center; font-size: 9px; color: var(--accent);
}
.moment-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 18px; box-shadow: var(--shadow);
}
.moment-date { font-size: 12px; color: var(--text-sub); margin-bottom: 6px; display: flex; gap: 8px; align-items: center; }
.moment-content { font-size: 14.5px; }
.moment-content p { margin: .4em 0; }
.moment-content img { border-radius: 10px; cursor: zoom-in; }
.moment-imgs { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; margin-top: 8px; }
.moment-imgs img { width: 100%; height: 150px; object-fit: cover; border-radius: 10px; cursor: zoom-in; }

/* ---------- 图片墙（瀑布流） ---------- */
.gallery-cols { display: flex; gap: 12px; align-items: flex-start; margin: 26px 0 48px; }
.gallery-col { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 12px; }
.gallery-item { cursor: zoom-in; }
.gallery-item img {
  width: 100%; display: block; border-radius: 12px; border: 1px solid var(--line);
  box-shadow: var(--shadow); transition: transform .18s;
}
.gallery-item:hover img { transform: scale(1.015); }
.gallery-note { font-size: 12px; color: var(--text-sub); margin-top: 4px; }
.gallery-empty {
  border: 2px dashed var(--line); border-radius: var(--radius);
  padding: 60px 24px; text-align: center; color: var(--text-sub); margin: 30px 0 48px;
}
.gallery-empty code { background: var(--bg-soft); padding: 2px 8px; border-radius: 6px; font-size: 12.5px; }

/* ---------- 友链 ---------- */
.friends-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 14px; margin: 26px 0 48px; }
.friend-card {
  display: flex; gap: 12px; align-items: center;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; color: var(--text); box-shadow: var(--shadow); transition: transform .18s, box-shadow .18s;
}
.friend-card:hover { transform: translateY(-2px); box-shadow: 0 4px 8px rgba(40,38,32,.08), 0 12px 32px rgba(40,38,32,.09); }
.friend-avatar {
  position: relative; width: 46px; height: 46px; flex: none; border-radius: 12px; overflow: hidden;
  background: var(--accent-soft); display: grid; place-items: center;
  color: var(--accent); font-weight: 700; font-size: 18px; font-style: normal;
}
.friend-avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.friend-info { display: flex; flex-direction: column; line-height: 1.4; min-width: 0; }
.friend-info strong { font-size: 15px; }
.friend-info small { color: var(--text-sub); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 100; background: rgba(10, 10, 12, .88);
  display: grid; place-items: center; cursor: zoom-out; backdrop-filter: blur(6px);
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 94vw; max-height: 92vh; border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,.5); }
.lightbox-close {
  position: absolute; top: 18px; right: 24px; font-size: 30px; color: #fff;
  background: none; border: none; cursor: pointer; opacity: .8;
}
.lightbox-close:hover { opacity: 1; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 26px 0 40px; margin-top: 20px; }
.site-footer p { color: var(--text-sub); font-size: 12.5px; text-align: center; margin: 0; }

/* ---------- 返回顶部 ---------- */
.backtop {
  position: fixed; right: 22px; bottom: 26px; z-index: 60;
  width: 42px; height: 42px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--bg-card); color: var(--text); font-size: 18px; cursor: pointer;
  box-shadow: var(--shadow); opacity: 0; pointer-events: none; transform: translateY(8px);
  transition: all .25s;
}
.backtop.show { opacity: 1; pointer-events: auto; transform: none; }
.backtop:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- KaTeX / mermaid 容器 ---------- */
.article .mermaid { background: var(--bg-card); padding: 8px; text-align: center; overflow-x: auto; }

/* ---------- 响应式 ---------- */
@media (max-width: 560px) {
  .header-inner { height: 58px; gap: 8px; }
  .brand-text small { display: none; }
  .site-nav a { padding: 6px 9px; font-size: 13.5px; }
  .post-card { flex-direction: column; gap: 12px; }
  .post-cover { width: 100%; height: 160px; }
  .moments-wrap::before { left: 17px; }
  .moment-item { padding-left: 42px; }
  .moment-dot { left: 8px; }
}