/* ============================================================
   T04 — Swiss Editorial / International Typographic Style
   Grid-based, strong hierarchy, red accent, Helvetica feel
   ============================================================ */

/* --- Design Tokens --- */
:root {
  --xxf-primary: #dc2626;
  --xxf-accent: #dc2626;
  --xxf-surface: #fafafa;
  --xxf-ink: #111111;
  --xxf-muted: #666666;
  --xxf-line: #e0e0e0;
  --xxf-card: #ffffff;
  --xxf-radius: 0;
  --xxf-shadow: none;
  --xxf-max: 1200px;

  --font-stack: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Fira Code", monospace;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  --grid-gap: 2rem;
  --sidebar-width: 320px;

  --weight-regular: 400;
  --weight-bold: 700;
  --weight-black: 900;

  --line-thin: 1px solid var(--xxf-line);
  --line-thick: 3px solid var(--xxf-ink);
  --line-accent: 3px solid var(--xxf-accent);

  --transition: 150ms ease;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-stack);
  color: var(--xxf-ink);
  background: var(--xxf-surface);
  line-height: 1.7;
  min-height: 100vh;
}

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

a:hover {
  color: var(--xxf-accent);
}

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

ul, ol {
  list-style: none;
}

time {
  font-variant-numeric: tabular-nums;
}

/* --- Utility --- */
.section-rule {
  width: 100%;
  height: 2px;
  background: var(--xxf-ink);
  margin: var(--space-md) 0;
}

.section-header {
  margin-bottom: var(--space-lg);
}

.section-title {
  font-size: 1rem;
  font-weight: var(--weight-black);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.breadcrumb {
  font-size: 0.8125rem;
  color: var(--xxf-muted);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.breadcrumb a {
  color: var(--xxf-muted);
}

.breadcrumb a:hover {
  color: var(--xxf-accent);
}

.breadcrumb-sep {
  margin: 0 0.375em;
  color: var(--xxf-line);
}

.breadcrumb-current {
  color: var(--xxf-ink);
}

/* ---------- SEO Runtime Garbage Cleanup ---------- */
body[class*="template-"] :is(.site-header,.header-inner,.header-top,.main-content,.content-grid,.primary-col,.sidebar,.sidebar-block,.hero-section,.hero-body,.hero-grid,.ranking-section,.ranking-item,.article-grid,.article-card,.article-body,.list-item,.list-item-body,.show-body,.show-header,.show-article,.site-footer,.footer-inner,.footer-links,.pagination) > :where(font,ins,small,sup,time,tt,var,area,map,bdo,dfn):not([class]) { display: none !important; }
body[class*="template-"] :is(.brand,.header-search,.header-nav,.nav-list,.hero-image-wrap,.keywords-section,.keyword-cloud,.category-section,.category-grid,.category-card,.sidebar-list,.sidebar-catelist,.list-header,.list-items,.list-section,.show-meta,.show-keywords,.prev-next,.footer-list,.footer-bottom) > :where(font,ins,small,sup,time,tt,var,area,map,bdo,dfn):not([class]) { display: none !important; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  background: var(--xxf-card);
  border-bottom: var(--line-thick);
}

.header-inner {
  max-width: var(--xxf-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) 0;
  border-bottom: var(--line-thin);
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--xxf-ink);
  font-weight: var(--weight-black);
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  line-height: 1;
}

.brand:hover {
  color: var(--xxf-ink);
}

.brand-mark {
  display: inline-block;
  width: 12px;
  height: 12px;
  background: var(--xxf-accent);
}

.brand-name {
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Search */
.header-search {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--xxf-ink);
}

.search-input {
  border: none;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-stack);
  font-size: 0.8125rem;
  background: transparent;
  color: var(--xxf-ink);
  outline: none;
  width: 200px;
}

.search-input::placeholder {
  color: var(--xxf-muted);
  letter-spacing: 0.05em;
}

.search-btn {
  background: var(--xxf-ink);
  color: var(--xxf-card);
  border: none;
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.search-btn:hover {
  background: var(--xxf-accent);
}

/* Navigation */
.header-nav {
  padding: var(--space-md) 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.8125rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
  color: var(--xxf-ink);
}

.nav-link:hover {
  color: var(--xxf-accent);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: var(--space-md);
  right: var(--space-md);
  height: 2px;
  background: var(--xxf-accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-sitemap {
  margin-left: auto;
  color: var(--xxf-muted);
}

.header-rule {
  height: 3px;
  background: var(--xxf-accent);
}

/* ============================================================
   LAYOUT GRID
   ============================================================ */
.main-content {
  max-width: var(--xxf-max);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--grid-gap);
  align-items: start;
}

.primary-col {
  min-width: 0;
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero-section {
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-2xl);
  border-bottom: var(--line-thick);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero-image-wrap {
  min-width: 0;
}

.hero-image-link {
  display: block;
  overflow: hidden;
}

.hero-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 400ms ease;
}

.hero-image-link:hover .hero-image {
  transform: scale(1.02);
}

.hero-body {
  padding: var(--space-lg) 0;
}

.hero-label {
  display: inline-block;
  background: var(--xxf-accent);
  color: var(--xxf-card);
  font-size: 0.6875rem;
  font-weight: var(--weight-black);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.25em 0.75em;
  margin-bottom: var(--space-md);
}

.hero-title {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: var(--weight-black);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.hero-title a {
  color: var(--xxf-ink);
}

.hero-title a:hover {
  color: var(--xxf-accent);
}

.hero-excerpt {
  font-size: 1rem;
  color: var(--xxf-muted);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.hero-date {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--xxf-muted);
  text-transform: uppercase;
}

/* ============================================================
   RANKING
   ============================================================ */
.ranking-section {
  margin-bottom: var(--space-2xl);
}

.ranking-list {
  counter-reset: ranking;
}

.ranking-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: var(--line-thin);
}

.ranking-num {
  font-size: 1.75rem;
  font-weight: var(--weight-black);
  line-height: 1;
  color: var(--xxf-line);
  min-width: 2rem;
  flex-shrink: 0;
}

.ranking-item:nth-child(1) .ranking-num,
.ranking-item:nth-child(2) .ranking-num,
.ranking-item:nth-child(3) .ranking-num {
  color: var(--xxf-accent);
}

.ranking-body {
  flex: 1;
  min-width: 0;
}

.ranking-title {
  font-size: 0.9375rem;
  font-weight: var(--weight-bold);
  line-height: 1.4;
}

.ranking-title a {
  color: var(--xxf-ink);
}

.ranking-title a:hover {
  color: var(--xxf-accent);
}

.ranking-date {
  font-size: 0.75rem;
  color: var(--xxf-muted);
  letter-spacing: 0.05em;
}

/* ============================================================
   KEYWORDS / TAG CLOUD
   ============================================================ */
.keywords-section {
  margin-bottom: var(--space-2xl);
}

.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.keyword-tag {
  display: inline-block;
  padding: 0.3em 0.9em;
  border: 1px solid var(--xxf-ink);
  font-size: 0.75rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--xxf-ink);
  transition: background var(--transition), color var(--transition);
}

.keyword-tag:hover {
  background: var(--xxf-ink);
  color: var(--xxf-card);
}

/* ============================================================
   CATEGORY GRID
   ============================================================ */
.category-section {
  margin-bottom: var(--space-2xl);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--xxf-line);
}

.category-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--xxf-card);
  font-weight: var(--weight-bold);
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  transition: background var(--transition), color var(--transition);
}

.category-name {
  color: inherit;
}

.category-card:hover {
  background: var(--xxf-ink);
  color: var(--xxf-card);
}

.category-arrow {
  font-size: 1.125rem;
  transition: transform var(--transition);
}

.category-card:hover .category-arrow {
  transform: translateX(4px);
}

/* ============================================================
   ARTICLE GRID (Index Latest)
   ============================================================ */
.latest-section {
  margin-bottom: var(--space-2xl);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--grid-gap);
}

.article-card {
  display: flex;
  flex-direction: column;
  padding-bottom: var(--space-lg);
  border-bottom: var(--line-thin);
}

.article-card .article-body {
  padding-top: var(--space-xs);
}

.article-thumb {
  margin-bottom: var(--space-md);
  overflow: hidden;
}

.article-thumb img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 400ms ease;
}

.article-thumb:hover img {
  transform: scale(1.02);
}

.article-title {
  font-size: 1rem;
  font-weight: var(--weight-bold);
  line-height: 1.4;
  margin-bottom: var(--space-xs);
}

.article-title a {
  color: var(--xxf-ink);
}

.article-title a:hover {
  color: var(--xxf-accent);
}

.article-excerpt {
  font-size: 0.8125rem;
  color: var(--xxf-muted);
  line-height: 1.6;
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-date {
  font-size: 0.6875rem;
  color: var(--xxf-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  border-left: 1px solid var(--xxf-line);
  padding-left: var(--space-lg);
}

.sidebar-block {
  margin-bottom: var(--space-xl);
}

.sidebar-block:last-child {
  margin-bottom: 0;
}

.sidebar-header {
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--xxf-ink);
  margin-bottom: var(--space-md);
}

.sidebar-title {
  font-size: 0.75rem;
  font-weight: var(--weight-black);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.sidebar-list li {
  padding: var(--space-sm) 0;
  border-bottom: var(--line-thin);
}

.sidebar-list li:last-child {
  border-bottom: none;
}

.sidebar-link {
  font-size: 0.8125rem;
  font-weight: var(--weight-bold);
  line-height: 1.4;
  display: block;
  color: var(--xxf-ink);
}

.sidebar-link:hover {
  color: var(--xxf-accent);
}

.sidebar-date {
  font-size: 0.6875rem;
  color: var(--xxf-muted);
  letter-spacing: 0.05em;
  display: block;
  margin-top: 0.125rem;
}

.sidebar-catelist li {
  padding: var(--space-sm) 0;
  border-bottom: var(--line-thin);
}

.sidebar-catelist li:last-child {
  border-bottom: none;
}

.sidebar-catelist a {
  font-size: 0.8125rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.03em;
  color: var(--xxf-muted);
}

.sidebar-catelist a:hover {
  color: var(--xxf-accent);
}

/* ============================================================
   LIST PAGE
   ============================================================ */
.list-header {
  margin-bottom: var(--space-xl);
}

.list-title {
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: var(--weight-black);
  letter-spacing: -0.01em;
}

.list-items {
  margin-bottom: var(--space-xl);
}

.list-section {
  margin-bottom: var(--space-xl);
}

.list-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-lg) 0;
  border-bottom: var(--line-thin);
}

.list-item-index {
  font-size: 1.25rem;
  font-weight: var(--weight-black);
  color: var(--xxf-line);
  min-width: 2rem;
}

.list-item:nth-child(1) .list-item-index,
.list-item:nth-child(2) .list-item-index,
.list-item:nth-child(3) .list-item-index {
  color: var(--xxf-accent);
}

.list-item-body {
  min-width: 0;
}

.list-item-title {
  font-size: 1rem;
  font-weight: var(--weight-bold);
  line-height: 1.4;
}

.list-item-title a {
  color: var(--xxf-ink);
}

.list-item-title a:hover {
  color: var(--xxf-accent);
}

.list-item-meta {
  font-size: 0.6875rem;
  color: var(--xxf-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: var(--space-xs);
}

.list-item-excerpt {
  font-size: 0.8125rem;
  color: var(--xxf-muted);
  line-height: 1.5;
  margin-top: var(--space-xs);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.list-item-thumb {
  width: 120px;
  flex-shrink: 0;
  overflow: hidden;
}

.list-item-thumb img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  gap: 0;
  border-top: var(--line-thick);
  padding-top: var(--space-md);
}

.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 var(--space-sm);
  font-size: 0.8125rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.05em;
  border: 1px solid var(--xxf-line);
  color: var(--xxf-ink);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.page-link:hover {
  background: var(--xxf-ink);
  color: var(--xxf-card);
  border-color: var(--xxf-ink);
}

/* ============================================================
   SHOW / ARTICLE DETAIL
   ============================================================ */
.show-article {
  padding-right: var(--space-lg);
}

.show-header {
  margin-bottom: var(--space-xl);
}

.show-title {
  font-size: clamp(1.75rem, 3.5vw, 3rem);
  font-weight: var(--weight-black);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.show-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.75rem;
  color: var(--xxf-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.show-category {
  color: var(--xxf-accent);
  font-weight: var(--weight-bold);
}

.show-date {
  color: var(--xxf-muted);
}

.meta-sep {
  color: var(--xxf-line);
}

.show-body {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--xxf-ink);
  margin-bottom: var(--space-2xl);
}

.show-body p {
  margin-bottom: var(--space-lg);
}

.show-body h2,
.show-body h3,
.show-body h4 {
  font-weight: var(--weight-black);
  line-height: 1.3;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

.show-body h2 {
  font-size: 1.5rem;
}

.show-body h3 {
  font-size: 1.25rem;
}

.show-body img {
  margin: var(--space-xl) 0;
}

.show-body a {
  color: var(--xxf-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.show-body a:hover {
  color: var(--xxf-ink);
}

.show-body ul,
.show-body ol {
  padding-left: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.show-body li {
  margin-bottom: var(--space-sm);
  list-style: disc;
}

.show-body ol li {
  list-style: decimal;
}

.show-body blockquote {
  border-left: 3px solid var(--xxf-accent);
  padding-left: var(--space-lg);
  margin: var(--space-xl) 0;
  font-style: italic;
  color: var(--xxf-muted);
}

/* Show Keywords */
.show-keywords {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.keywords-label {
  font-size: 0.75rem;
  font-weight: var(--weight-black);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding-top: 0.3em;
  color: var(--xxf-muted);
}

.show-keywords .keyword-cloud {
  flex: 1;
}

/* Prev / Next */
.prev-next {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
}

.prev-next-item {
  font-size: 0.875rem;
  line-height: 1.5;
}

.prev-next-item a {
  font-weight: var(--weight-bold);
  color: var(--xxf-ink);
}

.prev-next-item a:hover {
  color: var(--xxf-accent);
}

.prev-next-prev {
  text-align: left;
}

.prev-next-next {
  text-align: right;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  margin-top: var(--space-3xl);
  background: var(--xxf-card);
}

.footer-rule {
  height: 3px;
  background: var(--xxf-ink);
}

.footer-inner {
  max-width: var(--xxf-max);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer-heading {
  font-size: 0.6875rem;
  font-weight: var(--weight-black);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--xxf-accent);
  margin-bottom: var(--space-md);
}

.footer-list li {
  padding: var(--space-xs) 0;
}

.footer-list a {
  font-size: 0.8125rem;
  color: var(--xxf-muted);
}

.footer-list a:hover {
  color: var(--xxf-accent);
}

.footer-bottom {
  text-align: center;
}

.footer-bottom .footer-rule {
  height: 1px;
  background: var(--xxf-line);
  margin-bottom: var(--space-lg);
}

.copyright {
  font-size: 0.75rem;
  color: var(--xxf-muted);
  letter-spacing: 0.05em;
}

.copyright a {
  color: var(--xxf-muted);
}

.copyright a:hover {
  color: var(--xxf-accent);
}

.beian {
  font-size: 0.6875rem;
  color: var(--xxf-muted);
  margin-top: var(--space-xs);
}

.beian a {
  color: var(--xxf-muted);
}

.beian a:hover {
  color: var(--xxf-accent);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet */
@media (max-width: 1024px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-left: none;
    padding-left: 0;
    border-top: var(--line-thick);
    padding-top: var(--space-xl);
  }

  .show-article {
    padding-right: 0;
  }

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

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --grid-gap: 1.5rem;
  }

  .header-inner {
    padding: 0 var(--space-md);
  }

  .header-top {
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  .header-search {
    width: 100%;
    order: 3;
  }

  .search-input {
    flex: 1;
    width: auto;
  }

  .nav-list {
    flex-wrap: wrap;
    gap: 0;
  }

  .nav-link {
    padding: var(--space-sm) var(--space-sm);
    font-size: 0.75rem;
  }

  .main-content {
    padding: var(--space-lg) var(--space-md);
  }

  .hero-section {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-xl);
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .ranking-list {
    font-size: 0.875rem;
  }

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

  .list-item-thumb {
    grid-column: 1 / -1;
    width: 100%;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .prev-next {
    grid-template-columns: 1fr;
  }

  .prev-next-next {
    text-align: left;
  }

  .pagination {
    flex-wrap: wrap;
  }

  .page-link {
    min-width: 2rem;
    height: 2rem;
    font-size: 0.75rem;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .brand-name {
    font-size: 1.125rem;
  }

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

  .hero-title {
    font-size: 1.25rem;
  }

  .list-title {
    font-size: 1.25rem;
  }

  .show-title {
    font-size: 1.5rem;
  }

  .show-body {
    font-size: 1rem;
  }
}