/* ============================================================
   做暖视频导航 — E-Ink Paper 风格
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600;700&family=Fira+Sans:wght@300;400;500;600;700&display=swap');

/* ── 根变量 ── */
:root {
  --paper: #fdfbf7;
  --ash:   #f5f5f5;
  --ink:   #1a1a1a;
  --ink60: rgba(26,26,26,.6);
  --ink20: rgba(26,26,26,.15);
  --border: #d8d4cc;
  --radius: 4px;
  --mono: 'Fira Code', 'Courier New', monospace;
  --sans: 'Fira Sans', system-ui, -apple-system, sans-serif;
  --max-prose: 760px;
  --max-wide: 1100px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 17px; line-height: 1.7; scroll-behavior: auto; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

/* 纸张底纹 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4'%3E%3Crect width='1' height='1' fill='%231a1a1a' opacity='.04'/%3E%3C/svg%3E");
  background-size: 4px 4px;
}
body > * { position: relative; z-index: 1; }

/* ── 顶部 Header ── */
.site-header {
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-row {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: .6rem 1.5rem .4rem;
  border-bottom: 1px solid var(--border);
}

.brand-name {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
  color: var(--ink);
}

a.brand-name { text-decoration: none; }

.brand-sub {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink60);
  letter-spacing: .06em;
}

/* 导航：header > nav > a×n（无 ul/li） */
.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  padding: 0 1.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.main-nav::-webkit-scrollbar { display: none; }

.main-nav a {
  display: inline-block;
  padding: .65rem .9rem;
  font-family: var(--mono);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .03em;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
  border-right: 1px solid var(--border);
  transition: none;
  min-height: 44px;
  line-height: 1;
  display: flex;
  align-items: center;
}
.main-nav a:first-child { border-left: 1px solid var(--border); }
.main-nav a[aria-current="page"] {
  background: var(--ink);
  color: var(--paper);
}
.main-nav a:hover:not([aria-current="page"]) {
  background: var(--ash);
}

/* ── 锚点条（二级粘性） ── */
.anchor-bar {
  position: sticky;
  top: calc(2.55rem + 44px);
  z-index: 90;
  background: var(--ash);
  border-bottom: 1px solid var(--border);
  padding: .4rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .3rem;
  font-family: var(--mono);
  font-size: .72rem;
  overflow-x: auto;
  scrollbar-width: none;
}
.anchor-bar::-webkit-scrollbar { display: none; }

.anchor-bar-label {
  font-weight: 600;
  color: var(--ink60);
  letter-spacing: .05em;
  white-space: nowrap;
}

.anchor-link {
  display: inline-block;
  padding: .2rem .6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  white-space: nowrap;
  color: var(--ink);
  font-size: .72rem;
  transition: none;
  min-height: 28px;
  line-height: 1.6;
}
.anchor-link:hover { background: var(--ink); color: var(--paper); }

/* ── 页面布局 ── */
.page-wrap {
  width: 100%;
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

.main-content { width: 100%; }

/* ── Hero（首页）── */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
  margin: -2rem -1.5rem 3rem;
  border-bottom: 2px solid var(--ink);
  position: relative;
  overflow: hidden;
}

.hero-left {
  position: relative;
  background: var(--ash);
  border-right: 2px solid var(--ink);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 点阵底纹装饰 */
.dot-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--ink) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: .08;
  pointer-events: none;
}

.hero-right {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  padding: 4rem 3rem 4rem 2rem;
  text-align: right;
  background: var(--paper);
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--ink60);
  margin-bottom: 1rem;
  text-transform: none;
}

.hero-h1 {
  font-family: var(--mono);
  font-size: clamp(1.6rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .02em;
  margin-bottom: 1.2rem;
}

.hero-desc {
  font-size: 1rem;
  color: var(--ink60);
  max-width: 28rem;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-cta {
  display: inline-block;
  padding: .7rem 1.8rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: .85rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  min-height: 44px;
  line-height: 1.4;
  transition: none;
}
.hero-cta:hover {
  background: var(--paper);
  color: var(--ink);
}

/* ── 正文容器 ── */
.prose-wrap,
.article-body,
.static-body,
.cat-prose {
  max-width: var(--max-prose);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 3rem;
}

.prose-wrap h2,
.article-body h2,
.static-body h2,
.cat-prose h2 { margin-top: 2rem; margin-bottom: .4rem; }

.prose-wrap p,
.article-body p,
.static-body p,
.cat-prose p { margin-bottom: 1rem; }

.prose-wrap ul,
.article-body ul,
.static-body ul { margin: 0 0 1rem 1.4rem; }

.prose-wrap ol,
.article-body ol,
.static-body ol { margin: 0 0 1rem 1.4rem; }

.prose-wrap li,
.article-body li,
.static-body li { margin-bottom: .4rem; }

.prose-wrap a,
.article-body a,
.static-body a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose-wrap table,
.article-body table,
.static-body table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: .85rem;
  margin-bottom: 1.5rem;
}
.prose-wrap th,
.article-body th,
.static-body th,
.prose-wrap td,
.article-body td,
.static-body td {
  border: 1px solid var(--border);
  padding: .5rem .75rem;
  text-align: left;
}
.prose-wrap th,
.article-body th,
.static-body th { background: var(--ash); font-weight: 600; }

code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--ash);
  border: 1px solid var(--border);
  padding: .1em .35em;
  border-radius: 2px;
}
pre {
  background: var(--ash);
  border: 1px solid var(--border);
  padding: 1rem;
  overflow-x: auto;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
}
pre code { background: none; border: none; padding: 0; }

blockquote {
  border-left: 3px solid var(--ink);
  padding: .5rem 1rem;
  margin: 1.5rem 0;
  color: var(--ink60);
  font-style: italic;
}

/* ── h2 后跟 hr ── */
h2 {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: .04em;
}
h2 + hr {
  border: none;
  border-top: 2px solid var(--ink);
  margin: .4rem 0 1.2rem;
}
hr { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }

h1 {
  font-family: var(--mono);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .02em;
  margin-bottom: .75rem;
}
h3 {
  font-family: var(--mono);
  font-size: .95rem;
  font-weight: 700;
  margin-bottom: .4rem;
}
h4, h5, h6 {
  font-family: var(--sans);
  font-weight: 600;
  margin-bottom: .4rem;
}

/* ── 卡片列表（首页分类）── ol > li > a + small */
.cat-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 3rem;
}

.cat-list li { display: contents; }

.card-link {
  text-decoration: none;
  display: block;
}
.card-link:hover .card {
  background: var(--ash);
}

.card {
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  padding: 1.2rem;
  background: var(--paper);
  transition: none;
  height: 100%;
}

.card-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .08em;
  border: 1px solid var(--border);
  padding: .1rem .4rem;
  border-radius: var(--radius);
  margin-bottom: .6rem;
  color: var(--ink60);
}

.card h3 { font-size: .95rem; margin-bottom: .4rem; }
.card p { font-size: .85rem; color: var(--ink60); line-height: 1.55; margin: 0; }

/* ── 子页列表（栏目页）── ol > li > a + small */
.child-list {
  list-style: none;
  margin-bottom: 2rem;
}
.child-list li {
  display: flex;
  flex-direction: column;
  padding: .85rem 0;
  border-bottom: 1px solid var(--border);
  gap: .2rem;
}
.child-list li a {
  font-family: var(--mono);
  font-size: .95rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
}
.child-list li a:hover { text-decoration: underline; }
.child-list li small {
  font-size: .8rem;
  color: var(--ink60);
  font-family: var(--sans);
}
.child-list li time {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink60);
}

/* ── 最近文章（首页）── */
.recent-list {
  list-style: none;
  margin-bottom: 2rem;
}
.recent-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: .7rem 0;
  border-bottom: 1px solid var(--border);
}
.recent-list li a {
  font-family: var(--mono);
  font-size: .9rem;
  text-decoration: none;
  flex: 1;
}
.recent-list li a:hover { text-decoration: underline; }
.recent-list li small {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink60);
  white-space: nowrap;
}

/* ── 文章页头部 ── */
.breadcrumb {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink60);
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
  align-items: center;
}
.breadcrumb a { color: var(--ink60); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span[aria-hidden] { color: var(--ink20); }
.breadcrumb span[aria-current] { color: var(--ink); }

.article-header { margin-bottom: 2rem; }

.article-cat-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .06em;
  background: var(--ink);
  color: var(--paper);
  padding: .15rem .5rem;
  border-radius: var(--radius);
  margin-bottom: .75rem;
}
.article-cat-tag a { color: var(--paper); text-decoration: none; }

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  align-items: center;
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--ink60);
  margin-bottom: 1rem;
}
.meta-label { font-weight: 600; }
.meta-sep { color: var(--ink20); }
.article-meta time { color: var(--ink); }

.article-lead {
  font-size: 1.05rem;
  color: var(--ink60);
  max-width: var(--max-prose);
  line-height: 1.7;
}

.article-hero { margin-bottom: 2rem; }
.article-hero-img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ── 相关文章侧边（无侧边栏，放在正文下方）── */
.related-aside {
  max-width: var(--max-prose);
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 2px solid var(--ink);
}

.related-list {
  list-style: none;
}
.related-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: .6rem 0;
  border-bottom: 1px solid var(--border);
}
.related-list li a {
  font-family: var(--mono);
  font-size: .88rem;
  text-decoration: none;
  flex: 1;
}
.related-list li a:hover { text-decoration: underline; }
.related-list li small {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink60);
  white-space: nowrap;
}

/* ── 静态页（about / privacy）── */
.static-header {
  margin-bottom: 2.5rem;
  max-width: var(--max-prose);
}

.page-eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--ink60);
  margin-bottom: .75rem;
}

.page-lead {
  font-size: 1.05rem;
  color: var(--ink60);
  line-height: 1.7;
  margin-top: .75rem;
}

.about-nav-list,
.privacy-nav-list {
  list-style: none;
  margin-bottom: 2rem;
}
.about-nav-list li,
.privacy-nav-list li {
  display: flex;
  flex-direction: column;
  padding: .75rem 0;
  border-bottom: 1px solid var(--border);
  gap: .15rem;
}
.about-nav-list li a,
.privacy-nav-list li a {
  font-family: var(--mono);
  font-size: .9rem;
  font-weight: 600;
  text-decoration: none;
}
.about-nav-list li a:hover,
.privacy-nav-list li a:hover { text-decoration: underline; }
.about-nav-list small,
.privacy-nav-list small {
  font-size: .78rem;
  color: var(--ink60);
}

/* ── 页脚（三列 dl，无 div 包裹）── */
.site-footer {
  border-top: 2px solid var(--ink);
  background: var(--ash);
  padding: 2rem 1.5rem 0;
  font-family: var(--mono);
}

.footer-brand-row {
  text-align: center;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.footer-brand {
  font-family: var(--mono);
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink);
  line-height: 1;
}

/* 三列 dl 并排 */
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-cols dl { }

.footer-cols dl dt {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ink);
  margin-bottom: .5rem;
  padding-bottom: .3rem;
  border-bottom: 1px solid var(--border);
}

.footer-cols dl dt:first-child {
  font-size: .7rem;
  color: var(--ink60);
  letter-spacing: .1em;
  border-bottom: 2px solid var(--ink);
  margin-bottom: .75rem;
}

.footer-cols dl dt a {
  text-decoration: none;
  color: var(--ink);
  font-size: .78rem;
  font-weight: 400;
  display: block;
  padding: .15rem 0;
}
.footer-cols dl dt a:hover { text-decoration: underline; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .9rem 0;
  border-top: 1px solid var(--border);
  font-size: .72rem;
  color: var(--ink60);
  flex-wrap: wrap;
  gap: .5rem;
}
.footer-bottom a { color: var(--ink60); text-decoration: none; }
.footer-bottom a:hover { text-decoration: underline; }

/* ── 页头部分（各内页）── */
.page-header {
  max-width: var(--max-prose);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--ink);
}
.page-header h1 { margin-bottom: .5rem; }

/* ── 栏目页子页列表包装 ── */
.child-list-wrap {
  max-width: var(--max-prose);
  margin-bottom: 3rem;
}

/* ── 各页面 section 间距 ── */
.content-section,
.cats-section,
.recent-section {
  margin-bottom: 3rem;
}

/* ── Hover 微交互（prefers-reduced-motion 下关闭）── */
@media (prefers-reduced-motion: no-preference) {
  .card-link:hover .card {
    outline: 2px solid var(--ink);
    outline-offset: -1px;
  }
  .main-nav a {
    transition: background .08s, color .08s;
  }
  .anchor-link {
    transition: background .08s, color .08s;
  }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ── 移动端 ── */
@media (max-width: 700px) {
  html { font-size: 16px; }

  .brand-row {
    flex-direction: column;
    gap: .2rem;
    padding: .5rem 1rem .35rem;
  }

  .main-nav {
    padding: 0 .5rem;
  }
  .main-nav a {
    padding: .55rem .65rem;
    font-size: .72rem;
    min-height: 44px;
  }

  .anchor-bar {
    top: auto;
    position: relative;
    padding: .4rem .75rem;
  }

  .page-wrap {
    padding: 1.25rem 1rem 2.5rem;
  }

  /* Hero 竖排 */
  .hero-section {
    grid-template-columns: 1fr;
    min-height: auto;
    margin: -1.25rem -1rem 2rem;
  }
  .hero-left {
    border-right: none;
    border-bottom: 2px solid var(--ink);
    min-height: 45vw;
  }
  .hero-right {
    align-items: flex-start;
    text-align: left;
    padding: 2rem 1.25rem;
  }
  .hero-cta { align-self: flex-start; }

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

  .footer-cols {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-brand {
    font-size: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .recent-list li {
    flex-direction: column;
    gap: .2rem;
  }

  .related-list li {
    flex-direction: column;
    gap: .15rem;
  }

  .about-nav-list li,
  .privacy-nav-list li { flex-direction: column; }
}

@media (max-width: 480px) {
  .hero-right { padding: 1.5rem 1rem; }
  .page-wrap { padding: 1rem .75rem 2rem; }
}

/* ── 打印 ── */
@media print {
  .site-header, .anchor-bar, .site-footer { display: none; }
  body { background: #fff; color: #000; }
  .page-wrap { max-width: 100%; padding: 0; }
  a[href]::after { content: ' (' attr(href) ')'; font-size: .75em; color: #555; }
}