/* ============================================================
   七色寮 · 日式极简深色主题
   纯手写 CSS，无任何框架依赖
   ============================================================ */

:root {
  /* 色彩 —— 暖调深色 + 朱红 */
  --bg:        #141412;
  --bg-soft:   #1a1a17;
  --bg-raised: #1f1f1b;
  --border:    #2c2b26;
  --border-soft: #23221e;
  --text:      #e6e2d5;
  --text-dim:  #9a9587;
  --text-faint:#6f6a5e;
  --accent:    #c0563f;   /* 朱红 · 印泥色 */
  --accent-hover: #d46a52;
  --accent-soft: rgba(192, 86, 63, 0.10);

  /* 字体 */
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", "MS Mincho", serif;
  --sans:  "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei UI", "PingFang SC", sans-serif;
  --mono:  "JetBrains Mono", "Cascadia Code", "Sarasa Mono SC", Consolas, monospace;

  /* 度量 */
  --max-w: 46rem;          /* 正文宽度 */
  --max-w-wide: 54rem;     /* 首页宽度 */
  --radius: 6px;
  --ease: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { color-scheme: dark; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.95;
  letter-spacing: 0.02em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent-soft); color: #f0d9d2; }

a { color: var(--accent); text-decoration: none; transition: color var(--ease); }
a:hover { color: var(--accent-hover); }

img { max-width: 100%; height: auto; }

/* ---------- 顶部横幅 ---------- */
.site-banner {
  position: relative;
  width: 100%;                  /* 全宽显示，无两侧黑边 */
  aspect-ratio: 7 / 3;          /* pc.jpg（21:9 横版）完全显示 */
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.site-banner picture {
  position: absolute; inset: 0;
}
.site-banner .banner-img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: brightness(0.62) saturate(0.82);
}
.site-banner::after {           /* 底部轻微渐隐（仅最底部，避免大面积黑边感） */
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20,20,18,0) 72%, rgba(20,20,18,0.5) 100%);
  pointer-events: none;
}
.banner-inner {
  position: relative;
  z-index: 1;
  padding: 0 24px;
  animation: fadeUp 0.9s var(--ease) both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

.site-title {
  margin: 0;
  font-size: clamp(2.4rem, 7vw, 3.6rem);
  font-weight: 700;
  letter-spacing: 0.35em;
  text-indent: 0.35em;          /* 补偿 letter-spacing 造成的视觉偏移 */
  color: #f2efe6;
  text-shadow: 0 2px 24px rgba(0,0,0,0.55);
}
.site-title .tate-mark {        /* 标题旁的小竖线装饰 */
  display: inline-block;
  width: 3px; height: 0.85em;
  background: var(--accent);
  margin-right: 0.35em;
  vertical-align: 0.06em;
  border-radius: 2px;
}
.site-tagline {
  margin: 0.9rem 0 0;
  font-size: 0.95rem;
  color: #c9c3b4;
  letter-spacing: 0.28em;
  text-indent: 0.28em;
  font-weight: 400;
}

/* 子页面横幅：全宽无黑边，限高（cover 裁切上下，主体居中安全） */
.banner-short {
  width: 100%;
  max-width: none;
  margin: 0;
  aspect-ratio: auto;
  height: clamp(180px, 26vh, 340px);
  min-height: 0;
  padding: 0;
  background: none;
}
.banner-short .site-title { font-size: clamp(1.4rem, 3.2vw, 1.9rem); }
.banner-short .site-tagline { display: none; }

/* ---------- 导航 ---------- */
.site-nav {
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.nav-inner {
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 2.2rem;
  height: 3.6rem;
}
.nav-brand {
  font-size: 0.95rem;
  color: var(--text-dim);
  letter-spacing: 0.22em;
  margin-right: auto;
}
.nav-brand b { color: var(--text); font-weight: 600; }
.nav-link {
  font-size: 0.88rem;
  color: var(--text-dim);
  letter-spacing: 0.14em;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.nav-link:hover { color: var(--text); }
.nav-link.active { color: var(--text); border-bottom-color: var(--accent); }

/* ---------- 导航 · 链接下拉菜单 ---------- */
.nav-menu { position: relative; }
.nav-menu summary {
  list-style: none;
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--text-dim);
  letter-spacing: 0.14em;
  padding: 0.35rem 0;
  user-select: none;
  transition: color var(--ease);
}
.nav-menu summary::-webkit-details-marker { display: none; }
.nav-menu summary:hover { color: var(--text); }
.nav-menu summary::after {
  content: "▾";
  margin-left: 0.45em;
  font-size: 0.72em;
  color: var(--text-faint);
}
.nav-menu[open] summary { color: var(--text); }
.nav-menu[open] summary::after { content: "▴"; }
.menu-drop {
  position: absolute;
  right: 0; top: calc(100% + 0.55rem);
  min-width: 150px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.35rem;
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.5);
  z-index: 50;
  display: flex;
  flex-direction: column;
  animation: fadeUp 0.18s var(--ease) both;
}
.menu-drop a {
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  border-radius: 4px;
  white-space: nowrap;
}
.menu-drop a:hover { color: var(--accent); background: var(--bg-soft); }
.menu-drop a.rss-item {
  border-top: 1px dashed var(--border);
  margin-top: 0.25rem;
  padding-top: 0.6rem;
}

/* ---------- 主体容器 ---------- */
.container {
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 0 24px;
}

main { padding-bottom: 4.5rem; }

/* ---------- 首页 · 主人简介 ---------- */
.owner {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  padding: 3.2rem 0 2.6rem;
}
.owner-avatar {
  width: 84px; height: 84px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
  flex-shrink: 0;
  box-shadow: 0 0 0 6px var(--bg-soft);
}
.owner-name {
  margin: 0 0 0.2rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}
.owner-bio {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
}

/* ---------- 首页 · 文章列表 ---------- */
.section-title {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 1.4rem;
  padding-top: 1.6rem;
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--text-dim);
}
.section-title::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--accent);
}
.section-title .jp {
  font-size: 0.78rem;
  color: var(--text-faint);
  letter-spacing: 0.2em;
}

.post-list { list-style: none; margin: 0; padding: 0; }

.post-item {
  padding: 1.5rem 0.4rem;
  border-bottom: 1px solid var(--border-soft);
  transition: background var(--ease);
  border-radius: 4px;
}
.post-item:first-child { border-top: 1px solid var(--border-soft); }
.post-item:hover { background: var(--bg-soft); }

.post-item .post-meta {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  margin-bottom: 0.35rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  letter-spacing: 0.08em;
}
.post-item .post-date::before { content: "◈ "; color: var(--accent); font-size: 0.7em; }
.post-item .post-tags { display: inline; }
.post-item .tag {
  font-family: var(--sans);
  font-size: 0.7rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.05rem 0.55rem;
  margin-left: 0.3rem;
  letter-spacing: 0.05em;
}
.post-item h3 {
  margin: 0 0 0.4rem;
  font-size: 1.22rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.post-item h3 a {
  color: var(--text);
  transition: color var(--ease);
}
.post-item h3 a:hover { color: var(--accent); }
.post-item .post-excerpt {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 文章页 ---------- */
.post-page { max-width: var(--max-w); }

.post-head {
  padding: 3.2rem 0 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.4rem;
}
.post-head .post-date {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-faint);
  letter-spacing: 0.1em;
  margin-bottom: 0.9rem;
}
.post-head .post-date::before { content: "◈ "; color: var(--accent); }
.post-head h1 {
  margin: 0;
  font-size: clamp(1.6rem, 4.5vw, 2.1rem);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.05em;
}
.post-head .post-sub {
  margin-top: 0.9rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
}

/* 文章底部标签区 */
.post-tags-bottom {
  margin-top: 2.8rem;
  padding-top: 1.3rem;
  border-top: 1px dashed var(--border-soft);
  font-size: 0.82rem;
  color: var(--text-faint);
  letter-spacing: 0.1em;
}
.post-tags-bottom .tag { margin-right: 0.4rem; }

/* ---------- 代码高亮配色（和风低饱和） ---------- */
.prose .tok-kw  { color: #d1755f; }   /* 关键字 · 朱 */
.prose .tok-str { color: #9db78c; }   /* 字符串 · 抹茶 */
.prose .tok-num { color: #d8a657; }   /* 数字 · 金茶 */
.prose .tok-com { color: #6b665a; font-style: italic; }  /* 注释 · 墨灰 */
.prose .tok-fn  { color: #8fb3c7; }   /* 函数/属性 · 青 */
.prose .tok-var { color: #c98fa0; }   /* 变量 · 藕 */

/* ---------- 正文排版 .prose ---------- */
.prose { font-size: 1.02rem; }

.prose > *:first-child { margin-top: 0; }
.prose p { margin: 0 0 1.4em; text-align: justify; }

.prose h2, .prose h3, .prose h4 {
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.04em;
  margin: 2.2em 0 0.9em;
}
.prose h2 {
  font-size: 1.42rem;
  padding-left: 0.75em;
  border-left: 3px solid var(--accent);
}
.prose h3 { font-size: 1.18rem; }
.prose h4 { font-size: 1.05rem; color: var(--text-dim); }

.prose a { text-decoration: underline; text-decoration-color: var(--accent-soft); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: var(--accent); }

.prose strong { color: #f0ecdf; font-weight: 700; }
.prose em { color: var(--text-dim); }

.prose code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  padding: 0.12em 0.42em;
  color: #e0b8a8;
  word-break: break-all;
}

.prose pre {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  line-height: 1.7;
  margin: 0 0 1.5em;
}
.prose pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85rem;
  color: #d6d2c4;
  word-break: normal;
}

.prose blockquote {
  margin: 1.6em 0;
  padding: 0.4em 0 0.4em 1.2em;
  border-left: 2px solid var(--border);
  color: var(--text-dim);
  font-style: normal;
}
.prose blockquote p { margin: 0.3em 0; }

.prose ul, .prose ol {
  margin: 0 0 1.5em;
  padding-left: 1.6em;
}
.prose li { margin: 0.35em 0; }
.prose li::marker { color: var(--accent); }
.prose ul ul, .prose ol ol { margin-bottom: 0; }

/* 任务列表（- [x] / - [ ]） */
.prose li.task-item {
  list-style: none;
  margin-left: -1.2em;
  display: flex;
  align-items: baseline;
  gap: 0.55em;
}
.task-item .cb {
  flex-shrink: 0;
  align-self: center;
  width: 0.92em; height: 0.92em;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-raised);
  position: relative;
  margin-top: 0.1em;
}
.task-item .cb.done {
  border-color: var(--accent);
  background: var(--accent);
}
.task-item .cb.done::after {
  content: "";
  position: absolute;
  left: 0.26em; top: 0.04em;
  width: 0.28em; height: 0.5em;
  border: solid #f4efe6;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.prose img {
  display: block;
  margin: 2em auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.prose hr {
  border: none;
  border-top: 1px dashed var(--border);
  margin: 3em auto;
  width: 60%;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.5em;
  font-size: 0.92rem;
}
.prose th, .prose td {
  border: 1px solid var(--border);
  padding: 0.5em 0.8em;
  text-align: left;
}
.prose th { background: var(--bg-raised); font-weight: 600; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 2.6rem 0 3rem;
  margin-top: 2rem;
}
.footer-inner {
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem 1.4rem;
  font-size: 0.8rem;
  color: var(--text-faint);
  letter-spacing: 0.1em;
}
.footer-inner .sep { color: var(--border); }
.footer-inner a { color: var(--text-faint); }
.footer-inner a:hover { color: var(--accent); }
.footer-verse {          /* 页脚一句点缀 */
  margin-top: 0.9rem;
  font-size: 0.75rem;
  color: var(--text-faint);
  letter-spacing: 0.18em;
}

/* ---------- 归档页 ---------- */
.archive-group { margin-bottom: 2.2rem; }
.archive-year {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin: 0 0 0.8rem;
}
.archive-month {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  margin: 0.9rem 0 0.4rem;
}
.archive-list { list-style: none; margin: 0; padding: 0; }
.archive-list li {
  display: flex;
  gap: 1.2rem;
  align-items: baseline;
  padding: 0.5rem 0.4rem;
  border-bottom: 1px dashed var(--border-soft);
  font-size: 0.95rem;
}
.archive-list .d {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  flex-shrink: 0;
}

/* ---------- 404 ---------- */
.notfound { text-align: center; padding: 6rem 0; }
.notfound .big {
  font-size: 5rem;
  font-weight: 700;
  color: var(--border);
  letter-spacing: 0.1em;
  margin: 0;
  line-height: 1;
}
.notfound p { color: var(--text-dim); margin-top: 1.2rem; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .owner { flex-direction: column; text-align: center; gap: 1rem; padding: 2.4rem 0 2rem; }
  /* 移动端：首页 3:4 竖版 hero（mobile.jpg）；子页面限高同 clamp 规则 */
  .site-banner { aspect-ratio: 3 / 4; }
  /* 导航不横向滚动，避免裁剪下拉面板；品牌隐藏给菜单让位 */
  .nav-inner { gap: 1rem; justify-content: flex-end; }
  .nav-brand { display: none; }
  .menu-drop { min-width: 0; }
  .menu-drop a { padding: 0.7rem 1rem; font-size: 0.95rem; }
  .post-item h3 { font-size: 1.12rem; }
  .archive-list li { flex-direction: column; gap: 0.1rem; }
}

/* ---------- 滚动条（暗色微调） ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #33322c; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #45433b; }