@import url('https://fonts.googleapis.com/css2?family=Anton&family=Epilogue:wght@400;500;600;700&display=swap');

/* ===== 重置与基础 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --c-bg: #fafaf8;
  --c-mid: #4a4a4a;
  --c-ink: #1a1a1a;
  --c-rule: #1a1a1a;
  --c-accent: #1a1a1a;
  --c-paper: #f0ede8;
  --c-stamp: #d4cfc8;
  --font-display: 'Anton', Impact, 'Arial Black', sans-serif;
  --font-body: 'Epilogue', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --border: 2px solid var(--c-ink);
  --border-thin: 1px solid var(--c-ink);
  --radius: 10px;
  --nav-h: 110px;
}

html {
  font-size: 16px;
  line-height: 1.6;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-body);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--c-bg);
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 39px,
      rgba(26,26,26,0.04) 39px,
      rgba(26,26,26,0.04) 40px
    );
}

a {
  color: var(--c-ink);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

ul, ol {
  list-style: none;
}

/* ===== 布局包裹 ===== */
.site-wrap {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== 侧边导航（aside > nav > ul > li > a） ===== */
.site-aside-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-ink);
  color: var(--c-bg);
  width: 100%;
  border-bottom: 3px solid var(--c-mid);
}

.brand-row {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.75rem 2rem 0.5rem;
  border-bottom: 1px solid rgba(250,250,248,0.2);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.05em;
  color: var(--c-bg);
  text-transform: uppercase;
  line-height: 1;
}

.brand-name:hover {
  text-decoration: none;
  opacity: 0.85;
}

.brand-tagline {
  font-size: 0.75rem;
  color: rgba(250,250,248,0.6);
  letter-spacing: 0.08em;
  font-style: italic;
}

.site-aside-nav nav {
  padding: 0 2rem;
}

.site-aside-nav nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.25rem;
  align-items: center;
}

.site-aside-nav nav ul li a {
  display: inline-block;
  padding: 0.6rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: rgba(250,250,248,0.85);
  letter-spacing: 0.02em;
  border-bottom: 2px solid transparent;
  min-height: 44px;
  line-height: 1.2;
  display: flex;
  align-items: center;
  transition: none;
}

.site-aside-nav nav ul li a:hover,
.site-aside-nav nav ul li a[aria-current="page"] {
  color: var(--c-bg);
  border-bottom-color: var(--c-bg);
  text-decoration: none;
}

.nav-ticker {
  padding: 0.3rem 2rem;
  font-size: 0.72rem;
  color: rgba(250,250,248,0.5);
  letter-spacing: 0.06em;
  border-top: 1px solid rgba(250,250,248,0.1);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  align-items: center;
  padding: 1rem 2rem;
  font-size: 0.8rem;
  color: var(--c-mid);
  border-bottom: var(--border-thin);
}

.breadcrumb a {
  color: var(--c-mid);
}

.breadcrumb a:hover {
  color: var(--c-ink);
}

.breadcrumb span {
  color: var(--c-ink);
}

/* ===== 首页 Hero ===== */
.home-main {
  flex: 1;
}

.hero-section {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr;
  overflow: hidden;
  border-bottom: 3px solid var(--c-ink);
}

.hero-figure {
  position: absolute;
  inset: 0;
  margin: 0;
  overflow: hidden;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.4) contrast(1.1);
  opacity: 0.35;
}

.hero-bg-text {
  position: absolute;
  bottom: -0.1em;
  left: -0.05em;
  font-family: var(--font-display);
  font-size: clamp(12rem, 30vw, 28rem);
  color: rgba(26,26,26,0.06);
  line-height: 0.8;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.02em;
}

.hero-text-block {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  min-height: 100vh;
  max-width: 900px;
  margin-left: auto;
}

.hero-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-mid);
  border: 1px solid var(--c-mid);
  padding: 0.25rem 0.75rem;
  margin-bottom: 1.5rem;
  display: inline-block;
  transform: rotate(-0.5deg);
}

.hero-h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 7rem);
  line-height: 0.9;
  letter-spacing: -0.01em;
  color: var(--c-ink);
  max-width: 12ch;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1rem;
  color: var(--c-mid);
  max-width: 40ch;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero-cta {
  display: inline-block;
  background: var(--c-ink);
  color: var(--c-bg);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.08em;
  padding: 0.9rem 2rem;
  border: 2px solid var(--c-ink);
  transform: rotate(0.3deg);
  min-height: 44px;
}

.hero-cta:hover {
  background: var(--c-bg);
  color: var(--c-ink);
  text-decoration: none;
  transform: rotate(-0.3deg);
}

/* ===== 内容区通用（main > div > figure/aside 交错） ===== */
.content-section,
.topic-content-section,
.article-body-section,
.about-body-section,
.privacy-body-section,
.tag-content-section {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  border-bottom: var(--border);
}

.content-aside,
.article-sidebar {
  padding: 2rem 1.5rem;
  border-right: var(--border);
  background: var(--c-paper);
  position: relative;
}

.content-aside::before {
  content: '';
  position: absolute;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  border: 1px dashed rgba(26,26,26,0.2);
  pointer-events: none;
}

.content-aside h2 {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.subtitle,
p.subtitle,
p.subhead,
p.desc,
p.lead {
  font-size: 0.78rem;
  color: var(--c-mid);
  margin-bottom: 1rem;
  font-style: italic;
}

.aside-index {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.aside-index li a {
  display: block;
  padding: 0.4rem 0.5rem;
  font-size: 0.85rem;
  border-left: 2px solid transparent;
  color: var(--c-mid);
  line-height: 1.4;
}

.aside-index li a:hover {
  border-left-color: var(--c-ink);
  color: var(--c-ink);
  text-decoration: none;
}

.aside-divider {
  height: 1px;
  background: var(--c-ink);
  margin: 1.25rem 0;
  opacity: 0.3;
}

.content-body {
  padding: 2.5rem 2rem;
}

.content-body h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 0.03em;
  margin-bottom: 0.25rem;
}

/* ===== page.content 正文样式 ===== */
.page-content {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-ink);
  max-width: 72ch;
}

.page-content h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 2rem 0 0.5rem;
  letter-spacing: 0.02em;
}

.page-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 1.5rem 0 0.4rem;
}

.page-content p {
  margin-bottom: 1rem;
}

.page-content ul,
.page-content ol {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.page-content ol {
  list-style: decimal;
}

.page-content li {
  margin-bottom: 0.4rem;
}

.page-content a {
  color: var(--c-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-content strong {
  font-weight: 700;
}

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

.page-content table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.page-content th,
.page-content td {
  border: 1px solid var(--c-ink);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

.page-content th {
  background: var(--c-ink);
  color: var(--c-bg);
  font-weight: 700;
}

/* ===== 首页栏目卡片（div > section×n） ===== */
.topics-section {
  padding: 3rem 2rem;
  border-bottom: var(--border);
}

.topics-section h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.03em;
  margin-bottom: 0.25rem;
}

.home-card,
.topic-card,
.tag-card {
  border: var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
  background: var(--c-bg);
  transform: rotate(var(--rot, 0deg));
  margin-bottom: 1rem;
  overflow: hidden;
}

.home-card::after,
.topic-card::after {
  content: '';
  position: absolute;
  inset: 3px;
  border: 1px dashed rgba(26,26,26,0.15);
  border-radius: calc(var(--radius) - 2px);
  pointer-events: none;
}

.home-card:nth-child(odd),
.topic-card:nth-child(even) {
  background: var(--c-paper);
}

.card-num {
  font-family: var(--font-display);
  font-size: 3rem;
  color: rgba(26,26,26,0.1);
  line-height: 1;
  position: absolute;
  top: 0.5rem;
  right: 1rem;
  pointer-events: none;
  user-select: none;
}

.home-card h3,
.topic-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.03em;
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 1;
}

.home-card h3 a,
.topic-card h3 a {
  color: var(--c-ink);
}

.home-card h3 a:hover,
.topic-card h3 a:hover {
  text-decoration: underline;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--c-mid);
  line-height: 1.6;
  margin-bottom: 0.75rem;
  position: relative;
  z-index: 1;
}

.card-meta {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--c-mid);
  border: 1px solid var(--c-mid);
  padding: 0.1rem 0.5rem;
  margin-bottom: 0.75rem;
}

.card-date {
  font-size: 0.75rem;
  color: var(--c-mid);
  margin-bottom: 0.5rem;
  font-style: italic;
}

.card-link {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--c-ink);
  color: var(--c-ink);
  padding-bottom: 1px;
  position: relative;
  z-index: 1;
}

.card-link:hover {
  text-decoration: none;
  opacity: 0.7;
}

/* ===== 栏目页/标签页布局 ===== */
.topic-main,
.tag-main {
  flex: 1;
}

.topic-hero-section,
.tag-header-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 40vh;
  border-bottom: var(--border);
  overflow: hidden;
}

.topic-hero-figure,
.tag-header-figure {
  position: relative;
  background: var(--c-ink);
  overflow: hidden;
  margin: 0;
  min-height: 280px;
}

.topic-bg-num {
  position: absolute;
  bottom: -0.15em;
  left: -0.05em;
  font-family: var(--font-display);
  font-size: clamp(6rem, 15vw, 14rem);
  color: rgba(250,250,248,0.08);
  line-height: 0.8;
  pointer-events: none;
  user-select: none;
}

.topic-header-aside,
.tag-header-aside {
  padding: 3rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: var(--border);
  background: var(--c-bg);
}

.eyebrow-tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: 1px solid var(--c-ink);
  padding: 0.2rem 0.6rem;
  margin-bottom: 1rem;
  transform: rotate(-0.4deg);
}

.topic-h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

.topic-desc {
  font-size: 0.95rem;
  color: var(--c-mid);
  line-height: 1.7;
  max-width: 40ch;
}

.child-list-section {
  padding: 3rem 2rem;
  border-top: var(--border);
}

.child-list-section h2 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin-bottom: 0.25rem;
}

/* ===== 文章页布局 ===== */
.article-main {
  flex: 1;
}

.article-header-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 45vh;
  border-bottom: var(--border);
  overflow: hidden;
}

.article-hero-figure {
  position: relative;
  overflow: hidden;
  margin: 0;
  min-height: 300px;
  background: var(--c-paper);
}

.article-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.3) contrast(1.05);
}

.article-hero-placeholder {
  background: var(--c-ink);
}

.hero-placeholder-bg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: clamp(5rem, 12vw, 12rem);
  color: rgba(250,250,248,0.08);
  pointer-events: none;
  user-select: none;
}

.article-header-aside {
  padding: 3rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: var(--border);
}

.article-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.article-meta time {
  font-size: 0.78rem;
  color: var(--c-mid);
  letter-spacing: 0.04em;
  font-style: italic;
}

.article-h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 3rem);
  line-height: 1;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

.article-lead {
  font-size: 0.95rem;
  color: var(--c-mid);
  line-height: 1.7;
  max-width: 40ch;
}

/* ===== 关于/隐私页 ===== */
.about-main,
.privacy-main {
  flex: 1;
}

.about-header-section,
.privacy-header-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 35vh;
  border-bottom: var(--border);
  overflow: hidden;
}

.about-header-figure,
.privacy-header-figure {
  position: relative;
  background: var(--c-ink);
  overflow: hidden;
  margin: 0;
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-logo {
  max-width: 160px;
  position: relative;
  z-index: 2;
  filter: invert(1);
}

.about-bg-text {
  position: absolute;
  bottom: -0.1em;
  left: -0.05em;
  font-family: var(--font-display);
  font-size: clamp(5rem, 14vw, 13rem);
  color: rgba(250,250,248,0.07);
  line-height: 0.8;
  pointer-events: none;
  user-select: none;
}

.about-header-aside,
.privacy-header-aside {
  padding: 3rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: var(--border);
}

.about-h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 3rem);
  line-height: 1;
  margin-bottom: 1rem;
}

.about-lead {
  font-size: 0.95rem;
  color: var(--c-mid);
  line-height: 1.7;
}

.privacy-date {
  font-size: 0.82rem;
  color: var(--c-mid);
  font-style: italic;
}

/* ===== 页脚（footer 三列 dl） ===== */
.site-footer {
  background: var(--c-ink);
  color: var(--c-bg);
  border-top: 3px solid var(--c-mid);
  margin-top: auto;
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-bottom: 1px solid rgba(250,250,248,0.15);
}

.footer-col {
  padding: 2rem 1.5rem;
  border-right: 1px solid rgba(250,250,248,0.1);
}

.footer-col:last-child {
  border-right: none;
}

.footer-col dt {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  color: var(--c-bg);
  border-bottom: 1px solid rgba(250,250,248,0.2);
  padding-bottom: 0.5rem;
}

.footer-col dd {
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
  color: rgba(250,250,248,0.7);
  line-height: 1.6;
}

.footer-col dd a {
  color: rgba(250,250,248,0.7);
}

.footer-col dd a:hover {
  color: var(--c-bg);
  text-decoration: underline;
}

.footer-bottom {
  text-align: center;
  padding: 1.25rem 2rem;
  font-size: 0.78rem;
  color: rgba(250,250,248,0.4);
  letter-spacing: 0.04em;
}

/* ===== 动效：Stagger List ===== */
@media (prefers-reduced-motion: no-preference) {
  .home-card,
  .topic-card,
  .tag-card {
    opacity: 0;
    transform: rotate(var(--rot, 0deg)) translateY(24px);
    animation: stagger-in 0.45s ease forwards;
  }

  .home-card:nth-child(1), .topic-card:nth-child(1), .tag-card:nth-child(1) { animation-delay: 0.05s; }
  .home-card:nth-child(2), .topic-card:nth-child(2), .tag-card:nth-child(2) { animation-delay: 0.12s; }
  .home-card:nth-child(3), .topic-card:nth-child(3), .tag-card:nth-child(3) { animation-delay: 0.19s; }
  .home-card:nth-child(4), .topic-card:nth-child(4), .tag-card:nth-child(4) { animation-delay: 0.26s; }
  .home-card:nth-child(5), .topic-card:nth-child(5), .tag-card:nth-child(5) { animation-delay: 0.33s; }
  .home-card:nth-child(6), .topic-card:nth-child(6), .tag-card:nth-child(6) { animation-delay: 0.40s; }

  @keyframes stagger-in {
    to {
      opacity: 1;
      transform: rotate(var(--rot, 0deg)) translateY(0);
    }
  }

  .hero-h1 {
    animation: sketch-reveal 0.6s ease-out both;
  }

  @keyframes sketch-reveal {
    from { clip-path: inset(0 100% 0 0); }
    to { clip-path: inset(0 0% 0 0); }
  }
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .content-section,
  .topic-content-section,
  .article-body-section,
  .about-body-section,
  .privacy-body-section,
  .tag-content-section {
    grid-template-columns: 1fr;
  }

  .content-aside,
  .article-sidebar {
    border-right: none;
    border-bottom: var(--border);
  }

  .content-aside::before {
    display: none;
  }

  .article-header-section,
  .topic-hero-section,
  .tag-header-section,
  .about-header-section,
  .privacy-header-section {
    grid-template-columns: 1fr;
  }

  .topic-hero-figure,
  .tag-header-figure,
  .article-hero-figure,
  .about-header-figure,
  .privacy-header-figure {
    min-height: 180px;
    border-left: none;
    border-bottom: var(--border);
  }

  .topic-header-aside,
  .tag-header-aside,
  .article-header-aside,
  .about-header-aside,
  .privacy-header-aside {
    border-left: none;
    border-top: var(--border);
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-col {
    border-right: none;
    border-bottom: 1px solid rgba(250,250,248,0.1);
  }
}

@media (max-width: 640px) {
  .brand-row {
    padding: 0.6rem 1rem 0.4rem;
    flex-wrap: wrap;
  }

  .brand-name {
    font-size: 1.2rem;
  }

  .site-aside-nav nav {
    padding: 0 1rem;
  }

  .site-aside-nav nav ul li a {
    padding: 0.5rem 0.5rem;
    font-size: 0.78rem;
  }

  .nav-ticker {
    padding: 0.3rem 1rem;
  }

  .breadcrumb {
    padding: 0.75rem 1rem;
  }

  .hero-text-block {
    padding: 6rem 1.25rem 3rem;
    align-items: flex-end;
  }

  .hero-h1 {
    font-size: clamp(2rem, 10vw, 3.5rem);
  }

  .topics-section,
  .child-list-section {
    padding: 2rem 1rem;
  }

  .topic-header-aside,
  .tag-header-aside,
  .article-header-aside,
  .about-header-aside,
  .privacy-header-aside {
    padding: 1.5rem 1rem;
  }

  .content-body {
    padding: 1.5rem 1rem;
  }

  .content-aside,
  .article-sidebar {
    padding: 1.25rem 1rem;
  }

  .footer-col {
    padding: 1.5rem 1rem;
  }

  .footer-bottom {
    padding: 1rem;
  }

  .home-card,
  .topic-card,
  .tag-card {
    transform: rotate(0deg) !important;
  }
}