/* ========================================================
   触手面包车 — 深海墨绿 × 荧光青 克苏鲁复古科幻主题
   ======================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;700;900&family=Noto+Sans+SC:wght@400;500&display=swap');

/* ── 自定义属性 ── */
:root {
  --bg:        #0D2B2B;
  --bg2:       #0a2020;
  --bg3:       #102e2e;
  --surface:   #122424;
  --surface2:  #163030;
  --cyan:      #00E5CC;
  --cyan-dim:  #00bfaa;
  --cyan-glow: rgba(0,229,204,0.18);
  --navy:      #1A1A2E;
  --text:      #d4e8e8;
  --text-dim:  #7fa8a0;
  --text-head: #e8f5f5;
  --border:    rgba(0,229,204,0.22);
  --border2:   rgba(0,229,204,0.08);
  --font-serif: 'Noto Serif SC', 'Songti SC', Georgia, serif;
  --font-sans:  'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius:     4px;
  --radius-lg:  8px;
  --sidebar-w:  240px;
  --content-max: 740px;
  --gap:        2rem;
}

/* ── 重置 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 17px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.75;
  min-height: 100vh;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--cyan); text-decoration: none; transition: color .2s, opacity .2s; }
a:hover { color: #fff; text-decoration: underline; }
ul { list-style: none; }

/* ── 排版基础 ── */
h1,h2,h3,h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--text-head);
  line-height: 1.35;
}
h1 { font-size: 2rem; font-weight: 900; letter-spacing: .02em; }
h2 { font-size: 1.45rem; margin-bottom: .5rem; }
h3 { font-size: 1.15rem; }

/* ── 侧边栏导航 ── */
.site-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  padding: 2rem 0;
  display: flex;
  flex-direction: column;
}
.site-sidebar nav { display: flex; flex-direction: column; height: 100%; }

.brand-mark {
  padding: 0 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem;
}
.brand-text {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--cyan);
  letter-spacing: .04em;
  display: block;
}
.brand-logo { max-width: 160px; height: auto; }

.site-sidebar nav > ul { padding: 0 .75rem; }
.site-sidebar nav > ul > li { margin-bottom: .2rem; }
.site-sidebar nav > ul > li > a {
  display: block;
  padding: .65rem .85rem;
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: .9rem;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: background .2s, color .2s, border-color .2s;
  min-height: 40px;
}
.site-sidebar nav > ul > li > a:hover,
.site-sidebar nav > ul > li > a[aria-current="page"] {
  background: var(--cyan-glow);
  color: var(--cyan);
  border-color: var(--border);
  text-decoration: none;
}

/* ── 两列布局容器 ── */
.page-layout {
  display: flex;
  min-height: 100vh;
}
.page-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ── 面包屑 ── */
.breadcrumb {
  padding: 1rem var(--gap);
  font-size: .82rem;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border2);
  background: var(--bg2);
}
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb span[aria-hidden] { margin: 0 .35rem; }

/* ── 首页横幅 ── */
.site-banner {
  display: flex;
  min-height: 100vh;
}
.banner-hero {
  flex: 1;
  min-width: 0;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: linear-gradient(160deg, var(--navy) 0%, var(--bg) 60%);
  overflow: hidden;
}
.hero-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .35;
}
.banner-caption {
  position: relative;
  z-index: 1;
  padding: 3rem var(--gap) 2.5rem;
  background: linear-gradient(to top, rgba(13,43,43,.95) 60%, transparent);
}
.home-h1 {
  font-size: 2.4rem;
  color: #fff;
  text-shadow: 0 0 30px rgba(0,229,204,.4);
  margin-bottom: .75rem;
}
.banner-desc {
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 560px;
}

/* ── 首页主体 ── */
.home-main {
  flex: 1;
  padding: 2.5rem var(--gap);
  max-width: calc(var(--content-max) + var(--gap) * 2);
  margin: 0 auto;
  width: 100%;
}

/* ── 内容装饰线 ── */
.content-decoration { margin-bottom: 1.5rem; }
.deco-line {
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  border-radius: 2px;
  width: 120px;
}

/* ── section 标签 ── */
.section-label {
  margin-bottom: 1.25rem;
}
.section-label > span {
  display: inline-block;
  font-size: .75rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--cyan);
  padding: .2rem .65rem;
  border-radius: 2px;
}

/* ── 分类卡片网格 ── */
.home-categories { margin-bottom: 3rem; }
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}
.cat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color .2s, transform .2s;
}
.cat-card:hover { border-color: var(--cyan); transform: translateY(-3px); }
.cat-card-img img { width: 100%; height: 140px; object-fit: cover; }
.cat-card-body { padding: 1rem 1.1rem 1.25rem; }
.cat-card-body h3 { font-size: 1rem; margin-bottom: .4rem; }
.cat-card-body h3 a { color: var(--text-head); }
.cat-card-body h3 a:hover { color: var(--cyan); text-decoration: none; }
.cat-card-body p { font-size: .85rem; color: var(--text-dim); line-height: 1.5; }

/* ── 文章卡片网格 ── */
.home-articles { margin-bottom: 2rem; }
.art-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.1rem;
}
.art-card {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  transition: border-color .2s;
}
.art-card:hover { border-color: var(--cyan); }
.art-card-body { padding: 1rem 1.25rem; }
.card-date {
  display: block;
  font-size: .75rem;
  color: var(--cyan-dim);
  margin-bottom: .4rem;
  letter-spacing: .05em;
}
.art-card-body h3 { font-size: .95rem; margin-bottom: .4rem; }
.art-card-body h3 a { color: var(--text-head); }
.art-card-body h3 a:hover { color: var(--cyan); text-decoration: none; }
.art-card-body p { font-size: .83rem; color: var(--text-dim); line-height: 1.5; }

/* ── 栏目页 ── */
.cat-main {
  flex: 1;
  padding: 2rem var(--gap) 3rem;
  max-width: calc(var(--content-max) + var(--gap) * 2);
  width: 100%;
  margin: 0 auto;
}
.cat-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.tentacle-mark {
  font-size: 2.5rem;
  color: var(--cyan);
  opacity: .25;
}
.cat-deco { margin-bottom: .75rem; }
.cat-header h1 { margin-bottom: .75rem; }
.cat-lead { color: var(--text-dim); font-size: 1rem; max-width: 560px; }
.cat-content { margin-bottom: 2.5rem; }

/* ── 子页列表 ── */
.cat-children { margin-top: 2rem; }
.child-list { display: flex; flex-direction: column; gap: 1.1rem; }
.child-item {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  transition: border-color .2s;
}
.child-item:hover { border-color: var(--border); }
.child-thumb-wrap { width: 140px; flex-shrink: 0; }
.child-thumb-wrap .child-thumb { width: 100%; height: 100%; object-fit: cover; }
.child-body { padding: 1.1rem 1.25rem; flex: 1; min-width: 0; }
.child-body h3 { font-size: 1.05rem; margin-bottom: .4rem; }
.child-body h3 a { color: var(--text-head); }
.child-body h3 a:hover { color: var(--cyan); text-decoration: none; }
.child-body p { font-size: .88rem; color: var(--text-dim); line-height: 1.55; margin-bottom: .5rem; }
.child-meta time { font-size: .78rem; color: var(--cyan-dim); }

/* ── 文章页 ── */
.article-main {
  flex: 1;
  padding: 2rem var(--gap) 3rem;
  max-width: calc(var(--content-max) + var(--gap) * 2);
  width: 100%;
  margin: 0 auto;
}
.article-head { margin-bottom: 2rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
.article-hero { margin-bottom: 1.5rem; border-radius: var(--radius-lg); overflow: hidden; }
.article-hero-img { width: 100%; max-height: 380px; object-fit: cover; }
.article-deco { margin-bottom: .75rem; }
.article-head h1 { margin-bottom: .75rem; }
.article-meta { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.pub-date, .mod-date { font-size: .82rem; color: var(--cyan-dim); }
.article-body { margin-bottom: 2.5rem; }

/* ── 相关文章 ── */
.related-pages { margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid var(--border2); }
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.related-card {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 1rem;
  transition: border-color .2s;
}
.related-card:hover { border-color: var(--border); }
.related-card h3 { font-size: .9rem; margin-bottom: .35rem; }
.related-card h3 a { color: var(--text-head); }
.related-card h3 a:hover { color: var(--cyan); text-decoration: none; }
.related-card p { font-size: .8rem; color: var(--text-dim); line-height: 1.5; }

/* ── 关于页 ── */
.about-main {
  flex: 1;
  padding: 2.5rem var(--gap) 3rem;
  max-width: calc(var(--content-max) + var(--gap) * 2);
  width: 100%;
  margin: 0 auto;
}
.about-header {
  margin-bottom: 2rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.about-hero { margin-bottom: 1.5rem; border-radius: var(--radius-lg); overflow: hidden; }
.about-hero-img { width: 100%; max-height: 300px; object-fit: cover; }
.about-sigil {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  margin-bottom: 1rem;
}
.sigil-ring {
  color: var(--cyan);
  font-size: 2rem;
  opacity: .4;
  animation: pulse 4s ease-in-out infinite;
}
.sigil-ring.small { font-size: 1.2rem; animation-delay: 2s; }
@keyframes pulse {
  0%,100% { opacity: .2; }
  50% { opacity: .6; }
}
.about-header h1 { margin-bottom: .75rem; }
.about-tagline { color: var(--text-dim); font-size: .95rem; max-width: 460px; margin: 0 auto; }
.about-content { margin-bottom: 2.5rem; }
.about-links { margin-top: 2rem; }
.about-nav-list { display: flex; flex-direction: column; gap: .5rem; margin-top: .75rem; }
.about-nav-list li a {
  display: inline-block;
  padding: .5rem .9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--cyan-dim);
  font-size: .9rem;
  transition: background .2s, color .2s;
  min-height: 40px;
  line-height: 1.5;
}
.about-nav-list li a:hover { background: var(--cyan-glow); color: var(--cyan); text-decoration: none; }

/* ── 隐私页 ── */
.privacy-main {
  flex: 1;
  padding: 2.5rem var(--gap) 3rem;
  max-width: calc(var(--content-max) + var(--gap) * 2);
  width: 100%;
  margin: 0 auto;
}
.privacy-header { margin-bottom: 2rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
.privacy-icon { font-size: 2rem; margin-bottom: .75rem; opacity: .6; }
.privacy-header h1 { margin-bottom: .5rem; }
.privacy-updated { font-size: .82rem; color: var(--text-dim); }
.privacy-body { margin-bottom: 2.5rem; }
.privacy-links { margin-top: 2rem; }
.privacy-nav-list { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: .75rem; }
.privacy-nav-list li a {
  display: inline-block;
  padding: .5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--cyan-dim);
  font-size: .9rem;
  min-height: 40px;
  line-height: 1.5;
  transition: background .2s, color .2s;
}
.privacy-nav-list li a:hover { background: var(--cyan-glow); color: var(--cyan); text-decoration: none; }

/* ── 正文 prose ── */
.prose {
  max-width: var(--content-max);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}
.prose h2 {
  margin-top: 2.25rem;
  margin-bottom: .75rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--border2);
  font-size: 1.4rem;
}
.prose h3 {
  margin-top: 1.75rem;
  margin-bottom: .5rem;
  font-size: 1.1rem;
  color: var(--cyan-dim);
}
.prose p { margin-bottom: 1.2rem; }
.prose ul, .prose ol {
  padding-left: 1.5rem;
  margin-bottom: 1.2rem;
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: .4rem; }
.prose blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-left: 3px solid var(--cyan);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-dim);
  font-style: italic;
}
.prose code {
  background: var(--surface2);
  padding: .15em .4em;
  border-radius: 3px;
  font-size: .88em;
  color: var(--cyan);
  font-family: 'Courier New', monospace;
}
.prose pre {
  background: var(--surface2);
  padding: 1.25rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin-bottom: 1.2rem;
  border: 1px solid var(--border2);
}
.prose pre code { background: none; padding: 0; font-size: .85em; }
.prose img {
  border-radius: var(--radius-lg);
  margin: 1.5rem 0;
  border: 1px solid var(--border2);
}
.prose a { color: var(--cyan); border-bottom: 1px solid rgba(0,229,204,.3); }
.prose a:hover { border-bottom-color: var(--cyan); text-decoration: none; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.2rem;
  font-size: .9rem;
}
.prose th, .prose td {
  padding: .6rem .85rem;
  border: 1px solid var(--border);
  text-align: left;
}
.prose th {
  background: var(--surface2);
  color: var(--cyan-dim);
  font-weight: 700;
}
.prose tr:nth-child(even) td { background: var(--surface); }

/* ── 页脚 ── */
.site-footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 2.5rem var(--gap) 1.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  position: relative;
  margin-top: auto;
}
.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--cyan);
  font-weight: 700;
  margin-bottom: .5rem;
}
.footer-brand p { font-size: .83rem; color: var(--text-dim); line-height: 1.6; }
.footer-heading {
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: .75rem;
}
.footer-nav ul li { margin-bottom: .4rem; }
.footer-nav ul li a,
.footer-meta a {
  font-size: .83rem;
  color: var(--text-dim);
  display: inline-block;
  min-height: 28px;
  line-height: 1.5;
  transition: color .2s;
}
.footer-nav ul li a:hover, .footer-meta a:hover { color: var(--cyan); text-decoration: none; }
.footer-meta p { font-size: .82rem; color: var(--text-dim); margin-bottom: .4rem; }
.footer-bottom {
  grid-column: 1 / -1;
  border-top: 1px solid var(--border2);
  padding-top: 1.1rem;
  font-size: .78rem;
  color: var(--text-dim);
  text-align: center;
  letter-spacing: .04em;
}

/* ── 移动端 ── */
@media (max-width: 768px) {
  :root {
    --sidebar-w: 100%;
    --gap: 1.1rem;
  }

  .site-banner {
    flex-direction: column;
    min-height: auto;
  }
  .banner-hero { min-height: 60vw; }
  .home-h1 { font-size: 1.65rem; }
  .banner-caption { padding: 2rem var(--gap) 1.75rem; }

  .page-layout { flex-direction: column; }

  .site-sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
  }
  .brand-mark { padding: 0 1rem 1rem; }
  .site-sidebar nav > ul {
    display: flex;
    flex-wrap: wrap;
    gap: .3rem;
    padding: 0 .75rem;
  }
  .site-sidebar nav > ul > li { margin-bottom: 0; }
  .site-sidebar nav > ul > li > a {
    font-size: .8rem;
    padding: .5rem .7rem;
    white-space: nowrap;
  }

  h1 { font-size: 1.55rem; }

  .cat-grid { grid-template-columns: 1fr; }
  .art-grid { grid-template-columns: 1fr; }

  .child-item { flex-direction: column; }
  .child-thumb-wrap { width: 100%; height: 160px; }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .footer-bottom { grid-column: 1; }

  .related-grid { grid-template-columns: 1fr; }

  .article-main,
  .cat-main,
  .about-main,
  .privacy-main,
  .home-main { padding: 1.5rem var(--gap) 2rem; }

  .about-sigil { display: none; }
}

@media (max-width: 480px) {
  html { font-size: 16px; }
  .home-h1 { font-size: 1.4rem; }
  h1 { font-size: 1.35rem; }
  .prose { font-size: .97rem; }
}

/* ── 装饰纹理 ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(0,229,204,.04) 0%, transparent 50%),
    radial-gradient(circle at 85% 80%, rgba(26,26,46,.6) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}
.page-layout, .site-banner, .home-main { position: relative; z-index: 1; }

/* ── 打印 ── */
@media print {
  .site-sidebar, .site-footer { display: none; }
  body { background: #fff; color: #000; }
  .prose a { color: #000; }
}