/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    list-style: none;
    text-decoration: none;
  }
  
  body {
    font-family: "Noto Sans JP", sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    color: #111827;
  }
  
  /* Typography System - タイポグラフィーシステム */
  /* Base font sizes - ベースフォントサイズ */
  /* xs: 0.75rem (12px), sm: 0.875rem (14px), base: 1rem (16px), lg: 1.125rem (18px), xl: 1.25rem (20px), 2xl: 1.5rem (24px), 3xl: 1.875rem (30px), 4xl: 2rem (32px), 5xl: 2.5rem (40px) */
  
  /* Heading sizes - 見出しサイズ */
  h1 {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.3;
    color: #111827;
  }
  
  h2 {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.4;
    color: #111827;
  }
  
  h3 {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.4;
    color: #111827;
  }
  
  h4 {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.4;
    color: #111827;
  }
  
  h5 {
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.4;
    color: #111827;
  }
  
  :root {
    --sova-green-dark: #004544;
    --sova-green: #008482;
    --sova-green-light: #00a8a5;
  }
  
  /* Animations */
  @keyframes gradientShift {
    0% {
      background-position: 0% 50%;
    }
    50% {
      background-position: 100% 50%;
    }
    100% {
      background-position: 0% 50%;
    }
  }
  
  .animated-gradient-bg {
    background: linear-gradient(-45deg, #f0fdf4, #ffffff, #f0fdfa, #ecfeff);
    background-size: 400% 400%;
    animation: gradientShift 20s ease infinite;
  }
  
  /* Container */
  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
  }
  
  @media (min-width: 640px) {
    .container {
      padding: 0 1.5rem;
    }
  }
  
  @media (min-width: 1024px) {
    .container {
      padding: 0 2rem;
    }
  }
  
  /* Header */
  .header {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #e5e7eb;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  }
  
  .header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
  }
  
  .logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }
  
  .logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(to bottom right, #008482, #004544);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  }
  
  .logo-text {
    color: white;
    font-weight: 700;
    font-size: 1.125rem;
  }
  
  .logo-title {
    font-weight: 700;
    color: #111827;
    font-size: 1rem;
    line-height: 1.25;
  }
  
  .logo-subtitle {
    font-size: 0.75rem;
    color: #008482;
    font-weight: 500;
  }
  
  /* Navigation */
  .nav {
    display: none;
    align-items: center;
    gap: 1.5rem;
    flex: 1;
    max-width: 672px;
    margin: 0 1rem;
  }
  
  @media (min-width: 768px) {
    .nav {
      display: flex;
    }
  }
  
  .nav-link {
    font-size: 0.875rem;
    color: #4b5563;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.15s;
    display: flex;
    align-items: center;
    gap: 0.25rem;
  }
  
  .nav-link:hover {
    color: #008482;
  }
  
  .dropdown {
    position: relative;
  }
  
  .dropdown-trigger {
    cursor: default;
  }
  
  .dropdown-icon {
    width: 1rem;
    height: 1rem;
  }
  
  .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 0.5rem;
    width: 256px;
    background-color: white;
    border-radius: 1rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border: 2px solid #f3f4f6;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
  }
  
  .dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .dropdown-menu-inner {
    padding: 0.5rem 0;
  }
  
  .dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    color: #374151;
    text-decoration: none;
    transition: all 0.15s;
  }
  
  .dropdown-item:hover {
    background-color: rgba(0, 132, 130, 0.05);
    color: #008482;
  }
  
  .dropdown-item-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: #008482;
  }
  
  .dropdown-item-text {
    font-weight: 500;
  }
  
  /* Search Bar */
  .header-search {
    display: none;
  }
  
  @media (min-width: 1024px) {
    .header-search {
      display: flex;
      align-items: center;
    }
  }
  
  .search-form {
    position: relative;
  }
  
  .search-input {
    width: 100%;
    padding: 0.5rem 1rem;
    padding-right: 2.5rem;
    border-radius: 0.5rem;
    border: 2px solid #e5e7eb;
    font-size: 0.875rem;
    background-color: white;
    outline: none;
    transition: border-color 0.15s;
  }
  
  .search-input:focus {
    border-color: #008482;
  }
  
  .search-button {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background-color: #008482;
    color: white;
    padding: 0.375rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: background-color 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .search-button:hover {
    background-color: #004544;
  }
  
  .search-icon {
    width: 1rem;
    height: 1rem;
    display: block;
    flex-shrink: 0;
  }
  
  /* Mobile Search */
  .mobile-search-toggle {
    display: block;
    padding: 0.5rem;
    color: #4b5563;
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.15s;
  }
  
  .mobile-search-toggle:hover {
    color: #008482;
  }
  
  @media (min-width: 1024px) {
    .mobile-search-toggle {
      display: none;
    }
  }
  
  .mobile-search-icon {
    width: 1.25rem;
    height: 1.25rem;
  }
  
  .mobile-search-bar {
    display: none;
    border-top: 1px solid #e5e7eb;
    background-color: white;
  }
  
  .mobile-search-bar.active {
    display: block;
  }
  
  @media (min-width: 1024px) {
    .mobile-search-bar {
      display: none !important;
    }
  }
  
  .mobile-search-container {
    padding: 1rem 0;
  }
  
  /* Hero Section */
  .hero-section {
    padding: 3rem 0;
  }
  
  @media (min-width: 768px) {
    .hero-section {
      padding: 4rem 0;
    }
  }
  
  .hero-content {
    text-align: center;
    margin-bottom: 2.5rem;
  }
  
  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(0, 132, 130, 0.1);
    color: #004544;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
  }
  
  .hero-badge-icon {
    width: 1rem;
    height: 1rem;
  }
  
  /* Hero Title - 特別に大きなサイズ */
  .hero-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: #111827;
    margin-bottom: 1.5rem;
    line-height: 1.1;
  }
  
  @media (min-width: 768px) {
    .hero-title {
      font-size: 3.75rem;
    }
  }
  
  .hero-title-br {
    display: block;
  }
  
  @media (min-width: 768px) {
    .hero-title-br {
      display: none;
    }
  }
  
  .hero-description {
    font-size: 1.25rem;
    color: #4b5563;
    max-width: 768px;
    margin: 0 auto;
    line-height: 1.625;
  }
  
  .hero-highlight {
    color: #008482;
    font-weight: 700;
  }
  
  /* Quick Search */
  .quick-search {
    max-width: 672px;
    margin: 0 auto 2rem;
  }
  
  .quick-search-wrapper {
    position: relative;
  }
  
  .quick-search-input {
    width: 100%;
    padding: 1rem 1.5rem;
    padding-right: 3.5rem;
    border-radius: 1rem;
    border: 2px solid rgba(0, 132, 130, 0.2);
    font-size: 1rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    background-color: white;
    outline: none;
    transition: border-color 0.15s;
  }
  
  .quick-search-input:focus {
    border-color: #008482;
  }
  
  .quick-search-button {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(to right, #008482, #004544);
    color: white;
    padding: 0.75rem;
    border-radius: 0.75rem;
    border: none;
    cursor: pointer;
    transition: box-shadow 0.15s;
  }
  
  .quick-search-button:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  }
  
  .quick-search-icon {
    width: 1.25rem;
    height: 1.25rem;
  }
  
  /* Concerns Section */
  .concerns-section {
    padding-bottom: 3rem;
  }
  
  .section-header {
    text-align: center;
    margin-bottom: 2.5rem;
  }
  
  /* Section Title - セクションタイトル */
  .section-title {
    font-size: 2rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 1rem;
  }
  
  @media (min-width: 768px) {
    .section-title {
      font-size: 2.5rem;
    }
  }
  
  .section-title-gradient {
    display: inline-block;
    background: linear-gradient(to right, #008482, #004544);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  
  .section-description {
    font-size: 1rem;
    color: #4b5563;
  }
  
  /* Concern Cards Grid */
  .concern-cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
  }
  
  @media (min-width: 768px) {
    .concern-cards-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (min-width: 1024px) {
    .concern-cards-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }
  
  .concern-card {
    background-color: white;
    border-radius: 1rem;
    padding: 2rem;
    border: 2px solid rgba(0, 132, 130, 0.2);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  .concern-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(0, 132, 130, 0.15);
    border-color: rgba(0, 132, 130, 0.5);
  }
  
  .concern-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
  }
  
  .concern-card-icon-wrapper {
    flex-shrink: 0;
    width: 3.5rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .concern-card-icon {
    width: 2.5rem;
    height: 2.5rem;
    color: #008482;
  }
  
  .concern-card-title-wrapper {
    flex: 1;
  }
  
  .concern-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 0.375rem;
    line-height: 1.25;
    transition: color 0.15s;
  }
  
  .concern-card:hover .concern-card-title {
    color: #008482;
  }
  
  /* Concern List */
  .concern-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    font-size: 0.9375rem;
  }
  
  .concern-list-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  .concern-list-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: #008482;
    flex-shrink: 0;
    margin-top: 0.125rem;
  }
  
  .concern-list-text {
    color: #374151;
    line-height: 1.625;
  }
  
  .concern-list-bold {
    font-weight: 700;
  }
  
  .concern-card-footer {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid #f3f4f6;
  }
  
  .concern-card-link {
    color: #008482;
    font-weight: 700;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: gap 0.15s;
  }
  
  .concern-card:hover .concern-card-link {
    gap: 0.5rem;
  }
  
  .concern-card-arrow {
    width: 1rem;
    height: 1rem;
  }
  
  /* Main Content Layout */
  .main-wrapper {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem 2rem;
  }
  
  .content-layout {
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }
  
  @media (min-width: 1024px) {
    .content-layout {
      flex-direction: row;
    }
  }
  
  .main-content {
    flex: 1;
    min-width: 0;
  }
  
  @media (min-width: 1024px) {
    .main-content {
      width: 70%;
    }
  }
  
  /* Article Section */
  .article-section {
    margin-bottom: 3rem;
  }
  
  .article-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
  }
  
  /* Article Section Title - 記事セクションタイトル */
  .article-section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: #111827;
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }
  
  @media (min-width: 768px) {
    .article-section-title {
      font-size: 2rem;
    }
  }
  
  .article-section-icon {
    width: 2rem;
    height: 2rem;
    color: #008482;
  }
  
  .article-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }
  
  /* Common Tags - 共通タグスタイル */
  .article-tags,
  .search-content-tags,
  .recent-tags {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
  }
  
  .tag-primary,
  .sidebar-tag-primary,
  .recent-tag-primary {
    padding: 0.25rem 0.75rem;
    background-color: rgba(0, 132, 130, 0.1);
    color: #004544;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 9999px;
    display: inline-block;
  }
  
  .tag-separator,
  .sidebar-tag-separator,
  .recent-tag-separator {
    color: #9ca3af;
    font-size: 0.75rem;
  }
  
  .tag-secondary,
  .recent-tag-secondary {
    padding: 0.25rem 0.625rem;
    background-color: #f3f4f6;
    color: #374151;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
  }
  
  .tag-video,
  .recent-tag-video {
    padding: 0.25rem 0.75rem;
    background-color: #fef2f2;
    color: #b91c1c;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 0.375rem;
    border: 1px solid #fecaca;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    white-space: nowrap;
    flex-shrink: 0;
  }
  
  .tag-video-icon,
  .recent-tag-video-icon {
    width: 0.875rem;
    height: 0.875rem;
  }
  
  /* Common Meta Styles - 共通メタ情報スタイル */
  .article-meta,
  .search-content-meta,
  .subcategory-content-meta,
  .related-article-date,
  .category-card-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #6b7280;
  }
  
  /* 記事ページ用のメタ情報はgapを広げる */
  .article .article-meta {
    gap: 0.75rem;
  }
  
  .article-meta-icon,
  .search-content-meta-icon,
  .subcategory-content-meta-icon,
  .category-card-meta-icon {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
  }
  
  /* Common Card Styles - 共通カードスタイル */
  .article-card,
  .search-content-item,
  .subcategory-content-card,
  .category-card,
  .related-article-card,
  .recent-card {
    display: block;
    background-color: white;
    border: 2px solid #f3f4f6;
    border-radius: 1rem;
    padding: 1.5rem;
    text-decoration: none;
    transition: all 0.15s;
  }
  
  .article-card:hover,
  .search-content-item:hover,
  .subcategory-content-card:hover,
  .category-card:hover,
  .related-article-card:hover,
  .recent-card:hover {
    border-color: rgba(0, 132, 130, 0.4);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  }
  
  /* カテゴリーカードは特別なシャドウ */
  .category-card:hover {
    box-shadow: 0 20px 35px -15px rgba(0, 132, 130, 0.35);
    transform: translateY(-2px);
  }
  
  /* Recent Card は細めのボーダー */
  .recent-card {
    border: 1px solid #f3f4f6;
    padding: 1rem;
  }
  
  .recent-card:hover {
    border-color: rgba(0, 132, 130, 0.3);
  }
  
  .article-card-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .article-card .article-title,
  .article-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #111827;
    line-height: 1.375;
  }
  
  .article-excerpt {
    font-size: 0.9375rem;
    color: #4b5563;
    line-height: 1.625;
  }
  
  .article-card .article-meta {
    margin-top: 0.25rem;
  }
  
  /* Article with Rank */
  .article-rank-wrapper {
    display: flex;
    gap: 1rem;
  }
  
  .article-rank {
    flex-shrink: 0;
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
  }
  
  .rank-1 {
    background-color: #fffbeb;
    color: #b45309;
  }
  
  .rank-2 {
    background-color: #f9fafb;
    color: #4b5563;
  }
  
  .rank-3 {
    background-color: #fff7ed;
    color: #ea580c;
  }
  
  .rank-other {
    background-color: #f3f4f6;
    color: #4b5563;
  }
  
  .article-card-content-full {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  /* Sidebar */
  .sidebar {
    flex-shrink: 0;
  }
  
  @media (min-width: 1024px) {
    .sidebar {
      width: 30%;
    }
  }
  
  .sidebar-widget {
    background-color: white;
    border-radius: 1rem;
    border: 2px solid #f3f4f6;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  }
  
  .sidebar-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .sidebar-title-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: #008482;
  }
  
  .sidebar-list {
    display: flex;
    flex-direction: column;
    gap: 0;
  }
  
  .sidebar-item {
    display: block;
    padding: 1.25rem 0;
    border-bottom: 1px solid #f3f4f6;
    text-decoration: none;
  }
  
  .sidebar-item:first-child {
    padding-top: 0;
  }
  
  .sidebar-item:last-child {
    border-bottom: none;
  }
  
  .sidebar-item-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .sidebar-date {
    font-size: 0.75rem;
    color: #6b7280;
    font-weight: 500;
  }
  
  .sidebar-item-title {
    font-weight: 700;
    color: #111827;
    font-size: 0.9375rem;
    line-height: 1.375;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.15s;
  }
  
  .sidebar-item:hover .sidebar-item-title {
    color: #008482;
  }
  
  .sidebar-tags {
    display: flex;
    align-items: center;
    gap: 0.375rem;
  }
  
  .sidebar-tag-text {
    font-size: 0.75rem;
    color: #6b7280;
  }
  
  /* sidebar-tag-primary と tag-primary は共通化済み */
  
  /* Recent Articles */
  .recent-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  
  /* recent-card は共通カードスタイルに統合済み */
  
  .recent-card-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .recent-tags {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: #004544;
    flex-wrap: wrap;
  }
  
  /* recent-tag-* は共通タグスタイルに統合済み */
  .recent-tag-separator {
    font-weight: 400;
  }
  
  .recent-title {
    font-weight: 700;
    color: #111827;
    line-height: 1.375;
    font-size: 0.9375rem;
  }
  
  .recent-date {
    font-size: 0.75rem;
    color: #6b7280;
  }
  
  /* Category Page */
  /* Breadcrumb Section */
  .breadcrumb-section {
    padding: 1rem 0;
  }
  
  @media (min-width: 768px) {
    .breadcrumb-section {
      padding: 1.5rem 0;
    }
  }
  
  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: #6b7280;
    flex-wrap: wrap;
  }
  
  @media (min-width: 640px) {
    .breadcrumb {
      font-size: 0.875rem;
    }
  }
  
  .breadcrumb-link {
    color: #6b7280;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.15s;
  }
  
  .breadcrumb-link:hover {
    color: #008482;
  }
  
  .breadcrumb-icon {
    width: 1rem;
    height: 1rem;
    color: #d1d5db;
  }
  
  .breadcrumb-current {
    color: #111827;
    font-weight: 700;
  }
  
  .category-hero-section {
    padding-bottom: 2rem;
  }
  
  .category-hero {
    text-align: center;
    margin-bottom: 2rem;
  }
  
  .category-hero-icon {
    width: 3rem;
    height: 3rem;
    color: #008482;
    margin: 0 auto 1rem;
  }
  
  .category-hero-icon svg {
    width: 100%;
    height: 100%;
  }
  
  .category-hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: #111827;
    margin-bottom: 1rem;
  }
  
  @media (min-width: 768px) {
    .category-hero-title {
      font-size: 3.5rem;
    }
  }
  
  .category-hero-description {
    max-width: 640px;
    margin: 0 auto;
    color: #4b5563;
    line-height: 1.75;
    font-size: 1.125rem;
  }
  
  .category-search {
    margin-bottom: 0;
  }
  
  .subcategory-nav-section {
    padding-bottom: 2rem;
  }
  
  .subcategory-nav {
    background-color: white;
    border-radius: 1.5rem;
    border: 2px solid rgba(0, 132, 130, 0.2);
    padding: 1.5rem;
    box-shadow: 0 15px 35px -15px rgba(0, 132, 130, 0.2);
  }
  
  .subcategory-nav-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
  }
  
  .subcategory-nav-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: #008482;
  }
  
  .subcategory-nav-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #111827;
  }
  
  .subcategory-nav-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  
  .subcategory-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1.25rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    color: #374151;
    background-color: #f3f4f6;
    text-decoration: none;
    transition: all 0.2s;
  }
  
  .subcategory-pill:hover {
    background-color: #e5e7eb;
    color: #008482;
  }
  
  .category-main {
    display: flex;
    flex-direction: column;
    gap: 3rem;
  }
  
  .category-section {
    scroll-margin-top: 6rem;
  }
  
  .category-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
  }
  
  .category-section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 2rem;
    font-weight: 700;
    color: #111827;
  }
  
  .category-section-marker {
    width: 0.35rem;
    height: 2rem;
    border-radius: 9999px;
    background: linear-gradient(180deg, #00c9a7, #008482);
  }
  
  .category-card-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
  }
  
  /* category-card は共通カードスタイルに統合済み */
  .category-card {
    border-radius: 1.25rem;
    box-shadow: 0 10px 25px -15px rgba(0, 0, 0, 0.3);
  }
  
  .category-card-header {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
  }
  
  /* category-card-* は共通スタイルに統合済み */
  .category-card-title {
    line-height: 1.5;
    flex: 1;
  }
  
  .category-card-description {
    line-height: 1.75;
    margin-bottom: 0.75rem;
  }
  
  .category-section-footer {
    text-align: center;
  }
  
  .category-section-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: #008482;
    font-weight: 600;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.75rem;
    transition: all 0.2s;
  }
  
  .category-section-link:hover {
    background-color: rgba(0, 132, 130, 0.08);
    color: #004544;
  }
  
  .category-section-link-icon {
    width: 1rem;
    height: 1rem;
  }
  
  .category-sidebar {
    position: relative;
  }
  
  @media (min-width: 1024px) {
    .category-sidebar {
      position: sticky;
      top: 96px;
    }
  }
  
  .category-sidebar-widget {
    background-color: white;
    border-radius: 1.25rem;
    border: 2px solid #f3f4f6;
    padding: 1.75rem;
    box-shadow: 0 15px 35px -20px rgba(0, 0, 0, 0.4);
  }
  
  .category-sidebar-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #111827;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
  }
  
  .category-sidebar-title-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: #008482;
  }
  
  .category-sidebar-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  
  .category-sidebar-item {
    display: flex;
    gap: 0.75rem;
    text-decoration: none;
    padding: 0.5rem 0;
    border-bottom: 1px solid #f3f4f6;
  }
  
  .category-sidebar-item:last-child {
    border-bottom: none;
  }
  
  .category-sidebar-rank {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
  }
  
  .category-sidebar-content {
    flex: 1;
    min-width: 0;
  }
  
  .category-sidebar-item-title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: #111827;
    line-height: 1.45;
    margin-bottom: 0.5rem;
    transition: color 0.15s;
  }
  
  .category-sidebar-item:hover .category-sidebar-item-title {
    color: #008482;
  }
  
  .category-sidebar-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    background-color: #f3f4f6;
    color: #4b5563;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
  }
  
  .category-sidebar-date {
    font-size: 0.75rem;
    color: #6b7280;
  }
  
  /* Footer */
  .footer {
    background-color: #111827;
    color: #d1d5db;
    padding: 3rem 0;
  }
  
  .footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
  }
  
  @media (min-width: 768px) {
    .footer-grid {
      grid-template-columns: repeat(4, 1fr);
    }
  }
  
  .footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
  }
  
  .footer-logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(to bottom right, #008482, #004544);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  }
  
  .footer-logo-text {
    color: white;
    font-weight: 700;
    font-size: 1.125rem;
  }
  
  .footer-logo-name {
    color: white;
    font-weight: 700;
    font-size: 1.125rem;
  }
  
  .footer-description {
    font-size: 0.875rem;
    color: #9ca3af;
    line-height: 1.625;
  }
  
  .footer-title {
    color: white;
    font-weight: 700;
    margin-bottom: 1rem;
    font-size: 0.875rem;
  }
  
  .footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    font-size: 0.875rem;
  }
  
  .footer-link {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.15s;
  }
  
  .footer-link:hover {
    color: white;
  }
  
  .footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    margin-top: 2rem;
  }
  
  .footer-bottom p {
    font-size: 0.875rem;
    color: #9ca3af;
    text-align: center;
    margin-bottom: 0.5rem;
  }
  
  /* Footer Content Layout (content.html用) */
  .footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
  }
  
  @media (min-width: 768px) {
    .footer-content {
      grid-template-columns: repeat(3, 1fr);
    }
  }
  
  .footer-section {
    display: flex;
    flex-direction: column;
  }
  
  .footer-heading {
    color: white;
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 1rem;
  }
  
  .footer-text {
    font-size: 0.875rem;
    color: #9ca3af;
    line-height: 1.625;
    margin-bottom: 1rem;
  }
  
  .footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
  }
  
  .footer-links a {
    color: #d1d5db;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.15s;
  }
  
  .footer-links a:hover {
    color: white;
  }
  
  .footer-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    background-color: #008482;
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    transition: background-color 0.15s;
  }
  
  .footer-button:hover {
    background-color: #004544;
  }
  
  
  /* Search Header Section */
  .search-header-section {
    padding-bottom: 2rem;
  }
  
  .search-header {
    margin-bottom: 1.5rem;
  }
  
  .search-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 0.5rem;
  }
  
  .search-keyword-highlight {
    color: #008482;
  }
  
  .search-result-count {
    color: #6b7280;
    font-size: 1rem;
  }
  
  .search-result-number {
    font-weight: 700;
    color: #111827;
  }
  
  .no-result-message {
    color: #6b7280;
  }
  
  .hidden {
    display: none;
  }
  
  /* Search Bar */
  .search-bar-wrapper {
    max-width: 640px;
    margin-bottom: 1.5rem;
  }
  
  .search-bar-inner {
    position: relative;
  }
  
  .search-bar-input {
    width: 100%;
    padding: 1rem 1.5rem;
    padding-right: 3.5rem;
    border-radius: 1rem;
    border: 2px solid rgba(0, 132, 130, 0.2);
    font-size: 1rem;
    background-color: white;
    box-shadow: 0 10px 25px -15px rgba(0, 132, 130, 0.3);
    transition: border-color 0.2s;
  }
  
  .search-bar-input:focus {
    outline: none;
    border-color: #008482;
  }
  
  .search-bar-button {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(to right, #008482, #004544);
    color: white;
    padding: 0.75rem;
    border-radius: 0.75rem;
    border: none;
    cursor: pointer;
    transition: box-shadow 0.2s;
  }
  
  .search-bar-button:hover {
    box-shadow: 0 10px 25px -10px rgba(0, 132, 130, 0.5);
  }
  
  .search-bar-icon {
    width: 1.25rem;
    height: 1.25rem;
    display: block;
  }
  
  /* Search Filters */
  .search-filters {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
  }

  .search-filters form {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
  }
  
  .filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
  }
  
  .filter-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: #4b5563;
  }
  
  .filter-button {
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    background-color: #f3f4f6;
    color: #4b5563;
  }
  
  .filter-button:hover {
    background-color: #e5e7eb;
  }
  
  .filter-button-active {
    background-color: #008482;
    color: white;
  }
  
  .filter-button-active:hover {
    background-color: #004544;
  }
  
  .filter-select {
    padding: 0.5rem 1rem;
    background-color: white;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s;
  }
  
  .filter-select:focus {
    outline: none;
    border-color: #008482;
  }
  
  /* Search Results List */
  .search-results-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }
  
  .search-result-item {
    display: block;
    background-color: white;
    border: 2px solid #f3f4f6;
    border-radius: 1rem;
    padding: 1.5rem;
    text-decoration: none;
    transition: all 0.2s;
  }
  
  .search-result-item:hover {
    border-color: rgba(0, 132, 130, 0.4);
    box-shadow: 0 10px 25px -10px rgba(0, 132, 130, 0.3);
  }
  
  .search-result-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .search-result-title-row {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
  }
  
  .search-result-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #111827;
    line-height: 1.5;
    flex: 1;
  }
  
  .search-result-description {
    font-size: 0.9375rem;
    color: #6b7280;
    line-height: 1.7;
  }
  
  .search-result-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #6b7280;
    margin-top: 0.25rem;
  }
  
  .search-result-meta-icon {
    width: 1rem;
    height: 1rem;
  }
  
  .search-result-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: #f3f4f6;
    color: #4b5563;
    font-size: 0.75rem;
    border-radius: 9999px;
    font-weight: 600;
  }
  
  .search-result-date {
    color: #6b7280;
  }
  
  .search-result-video-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.75rem;
    background-color: #fef2f2;
    color: #dc2626;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 0.375rem;
    border: 1px solid #fecaca;
    flex-shrink: 0;
  }
  
  .search-result-video-icon {
    width: 0.875rem;
    height: 0.875rem;
  }
  
  /* Pagination */
  .pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 3rem;
  }
  
  .pagination-button {
    padding: 0.5rem 1rem;
    border: 2px solid #e5e7eb;
    background-color: white;
    color: #4b5563;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
  }
  
  .pagination-button:hover:not(.pagination-button-disabled) {
    border-color: #008482;
    color: #008482;
  }
  
  .pagination-button-active {
    background-color: #008482;
    color: white;
    border-color: #008482;
  }
  
  .pagination-button-active:hover {
    background-color: #004544;
    border-color: #004544;
  }
  
  .pagination-button-disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }
  
  .pagination-icon {
    width: 1.25rem;
    height: 1.25rem;
    display: block;
  }
  
  /* Back to Category */
  .back-to-category {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
  }
  
  .back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: white;
    border: 2px solid #008482;
    color: #008482;
    border-radius: 0.75rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s;
    box-shadow: 0 4px 10px -4px rgba(0, 132, 130, 0.3);
  }
  
  .back-button:hover {
    background-color: #008482;
    color: white;
  }
  
  .back-button-icon {
    width: 1.25rem;
    height: 1.25rem;
  }
  
  /* No Results */
  .no-results-container {
    background-color: white;
    border-radius: 1rem;
    border: 2px solid #f3f4f6;
    padding: 3rem 1rem;
    text-align: center;
  }
  
  .no-results-content {
    max-width: 448px;
    margin: 0 auto;
  }
  
  .no-results-icon-wrapper {
    width: 5rem;
    height: 5rem;
    margin: 0 auto 1.5rem;
    background-color: #f3f4f6;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .no-results-icon {
    width: 2.5rem;
    height: 2.5rem;
    color: #9ca3af;
  }
  
  .no-results-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 0.75rem;
  }
  
  .no-results-text {
    color: #6b7280;
    margin-bottom: 1.5rem;
    line-height: 1.7;
  }
  
  .no-results-keyword {
    font-weight: 700;
    color: #008482;
  }
  
  .no-results-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    justify-content: center;
  }
  
  @media (min-width: 640px) {
    .no-results-actions {
      flex-direction: row;
    }
  }
  
  .no-results-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: white;
    border: 2px solid #008482;
    color: #008482;
    border-radius: 0.75rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s;
    box-shadow: 0 4px 10px -4px rgba(0, 132, 130, 0.3);
  }
  
  .no-results-button:hover {
    background-color: #008482;
    color: white;
  }
  
  .no-results-button-icon {
    width: 1.25rem;
    height: 1.25rem;
  }
  
  
  /* Subcategory Page Styles */
  .subcategory-page-title {
    padding-bottom: 2rem;
  }
  
  .subcategory-title-wrapper {
    margin-bottom: 2rem;
  }
  
  .subcategory-badge-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
  }
  
  .subcategory-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: rgba(0, 132, 130, 0.1);
    color: #008482;
    font-size: 0.875rem;
    font-weight: 700;
    border-radius: 9999px;
  }
  
  .subcategory-badge-icon {
    width: 1rem;
    height: 1rem;
  }
  
  .subcategory-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 1rem;
  }
  
  .subcategory-description {
    font-size: 1rem;
    color: #4b5563;
    line-height: 1.625;
    max-width: 48rem;
  }
  
  .subcategory-content-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 2rem;
  }
  
  /* subcategory-content-card は共通カードスタイルに統合済み */
  .subcategory-content-card:hover {
    box-shadow: 0 20px 35px -15px rgba(0, 132, 130, 0.35);
  }
  
  .subcategory-content-inner {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  /* Common Content Card Title - 共通コンテンツカードタイトル */
  .subcategory-content-title,
  .search-content-title,
  .category-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #111827;
    line-height: 1.4;
  }
  
  /* Common Content Description - 共通コンテンツ説明文 */
  .subcategory-content-description,
  .category-card-description {
    font-size: 0.9375rem;
    color: #4b5563;
    line-height: 1.625;
  }
  
  .search-content-description {
    font-size: 0.9375rem;
    color: #6b7280;
    line-height: 1.7;
  }
  
  /* subcategory-content-meta は共通メタスタイルに統合済み */
  .subcategory-content-meta {
    margin-top: 0.25rem;
  }
  
  /* Subcategory Sidebar */
  .subcategory-sidebar-widget {
    background-color: white;
    border-radius: 1rem;
    border: 2px solid #f3f4f6;
    padding: 1.5rem;
    box-shadow: 0 10px 25px -15px rgba(0, 0, 0, 0.3);
  }
  
  @media (min-width: 1024px) {
    .subcategory-sidebar-widget {
      position: sticky;
      top: 6rem;
    }
  }
  
  .subcategory-sidebar-text {
    font-size: 1rem;
    color: #4b5563;
    margin-bottom: 1rem;
    line-height: 1.625;
  }
  
  .subcategory-sidebar-highlight {
    font-weight: 700;
    color: #008482;
    font-size: 1.125rem;
  }
  
  .subcategory-sidebar-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
  }
  
  .subcategory-sidebar-tag {
    padding: 0.5rem 0.75rem;
    background-color: #f3f4f6;
    color: #4b5563;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
  }
  
  .subcategory-sidebar-tag:hover {
    background-color: #e5e7eb;
    color: #4b5563;
  }.search-content-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }
  
  /* search-content-item は共通カードスタイルに統合済み */
  
  .search-content-inner {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  /* search-content-* は共通スタイルに統合済み */
  .search-content-title {
    font-size: 1.125rem;
    line-height: 1.4;
  }
  
  .search-content-description {
    color: #6b7280;
    line-height: 1.7;
  }
  
  .search-content-meta {
    margin-top: 0.25rem;
  }
  
  
  /* Article Page Layout - content.html用 */
  .main-layout {
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }
  
  @media (min-width: 1024px) {
    .main-layout {
      flex-direction: row;
      gap: 2rem;
    }
    
    .main-layout .main-content {
      flex: 1;
      min-width: 0;
    }
    
    .main-layout .sidebar {
      flex-shrink: 0;
      width: 30%;
    }
  }
  
  /* Article Page Styles - 記事ページ用スタイル */
  .article {
    background-color: white;
    border-radius: 1rem;
    border: 2px solid #f3f4f6;
    padding: 1.5rem;
    box-shadow: 0 10px 25px -15px rgba(0, 0, 0, 0.3);
    margin-bottom: 2rem;
  }
  
  @media (min-width: 768px) {
    .article {
      border-radius: 1.5rem;
      padding: 2.5rem;
    }
  }
  
  @media (min-width: 1024px) {
    .article {
      padding: 3rem;
    }
  }
  
  .article-header {
    margin-bottom: 2rem;
  }
  
  /* 記事ページ内のタイトルはより大きなサイズ */
  .article .article-title,
  .article > .article-header > .article-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 1.5rem;
    line-height: 1.3;
  }
  
  @media (min-width: 640px) {
    .article .article-title,
    .article > .article-header > .article-title {
      font-size: 1.875rem;
      margin-bottom: 2rem;
    }
  }
  
  @media (min-width: 768px) {
    .article .article-title,
    .article > .article-header > .article-title {
      font-size: 2.25rem;
    }
  }
  
  .article .article-meta,
  .article > .article-header > .article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    margin-top: 0;
  }
  
  .article-categories {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .article-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #6b7280;
  }
  
  .article-date svg {
    width: 1rem;
    height: 1rem;
  }
  
  /* Article Content Styles */
  .article-content {
    font-size: 0.9375rem;
    color: #4b5563;
    line-height: 1.8;
  }
  
  .article-content h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #1f2937;
    margin-top: 2rem;
    margin-bottom: 1rem;
    line-height: 1.3;
    padding-left: 1rem;
    border-left: 5px solid #008482;
  }
  
  .article-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1f2937;
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-left: 1rem;
    border-left: 4px solid #008482;
    line-height: 1.4;
  }
  
  .article-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
    margin-top: 1.75rem;
    margin-bottom: 0.875rem;
    padding-left: 0.75rem;
    border-left: 3px solid #00c9a7;
    line-height: 1.4;
  }
  
  .article-content h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #374151;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
    border-left: 2px solid #00c9a7;
    line-height: 1.4;
  }
  
  .article-content h5 {
    font-size: 1.125rem;
    font-weight: 700;
    color: #374151;
    margin-top: 1.25rem;
    margin-bottom: 0.625rem;
    padding-bottom: 0.25rem;
    border-bottom: 2px solid #e5e7eb;
    line-height: 1.4;
  }
  
  .article-content p {
    font-size: 0.9375rem;
    color: #4b5563;
    line-height: 1.8;
    margin-bottom: 1.5rem;
  }
  
  .article-content ul,
  .article-content ol {
    font-size: 0.9375rem;
    color: #4b5563;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
  }
  
  .article-content ul li {
    list-style-type: disc;
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
  }
  
  .article-content ol li {
    list-style-type: decimal;
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
  }
  
  .article-content strong {
    font-weight: 700;
    color: #111827;
  }
  
  .article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 1rem;
    margin: 2rem 0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  }

  .wp-block-heading {
    scroll-margin-top: 6rem;
  }
  
  /* Article Table */
  .article-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    font-size: 0.8125rem;
    overflow-x: auto;
    display: block;
  }
  
  @media (min-width: 640px) {
    .article-table {
      font-size: 0.875rem;
    }
  }
  
  @media (min-width: 768px) {
    .article-table {
      display: table;
    }
  }
  
  .article-table thead {
    background-color: rgba(0, 132, 130, 0.1);
  }
  
  .article-table th {
    padding: 0.625rem 0.75rem;
    text-align: left;
    font-weight: 700;
    color: #111827;
    border: 1px solid #d1d5db;
    white-space: nowrap;
  }
  
  @media (min-width: 640px) {
    .article-table th {
      padding: 0.75rem 1rem;
    }
  }
  
  .article-table td {
    padding: 0.625rem 0.75rem;
    border: 1px solid #d1d5db;
    color: #4b5563;
  }
  
  @media (min-width: 640px) {
    .article-table td {
      padding: 0.75rem 1rem;
    }
  }
  
  .article-table tbody tr {
    transition: background-color 0.2s;
  }
  
  .article-table tbody tr:hover {
    background-color: #f9fafb;
  }
  
  .table-highlight-blue {
    font-weight: 700;
    color: #2563eb;
  }
  
  .table-highlight-gray {
    font-weight: 700;
    color: #6b7280;
  }
  
  .table-highlight-green {
    font-weight: 700;
    color: #16a34a;
  }
  
  /* Article Video */
  .article-video {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 1rem;
    margin: 2rem 0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  }
  
  .article-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
  }
  
  /* Related Articles */
  .related-articles {
    margin-bottom: 3rem;
  }
  
  .related-articles-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }
  
  .related-articles-title svg {
    width: 1.5rem;
    height: 1.5rem;
    color: #008482;
  }
  
  .related-articles-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }
  
  /* related-article-card は共通カードスタイルに統合済み */
  .related-article-card {
    border-radius: 1.5rem;
  }
  
  .related-article-card:hover {
    box-shadow: 0 20px 35px -15px rgba(0, 132, 130, 0.35);
  }
  
  .related-article-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
  }
  
  /* Related Article - 関連記事 */
  .related-article-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #111827;
    line-height: 1.4;
    margin-bottom: 0.75rem;
  }
  
  .related-article-description {
    font-size: 0.9375rem;
    color: #6b7280;
    line-height: 1.625;
    margin-bottom: 0.75rem;
  }
  
  /* related-article-date は共通メタスタイルに統合済み */
  .related-article-date {
    margin-top: 0.25rem;
  }
  
  .related-article-date svg {
    width: 1rem;
    height: 1rem;
  }
  
  /* Table of Contents Widget */
  .toc-widget {
    background-color: white;
    border-radius: 1.5rem;
    border: 2px solid #f3f4f6;
    padding: 1.5rem;
    box-shadow: 0 10px 25px -15px rgba(0, 0, 0, 0.3);
    display: none;
  }
  
  @media (min-width: 1024px) {
    .toc-widget {
      display: block;
      position: sticky;
      top: 6rem;
    }
  }
  
  .toc-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .toc-title svg {
    width: 1.25rem;
    height: 1.25rem;
    color: #008482;
  }
  
  .toc-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .toc-link {
    display: block;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    color: #4b5563;
    text-decoration: none;
    border-radius: 0.5rem;
    transition: all 0.2s;
  }
  
  .toc-link:hover {
    background-color: rgba(0, 132, 130, 0.05);
    color: #008482;
  }
  
  .toc-link-h2 {
    font-weight: 700;
    color: #111827;
  }
  
  .toc-link-h3 {
    padding-left: 1.5rem;
  }
  
  .toc-active {
    background-color: rgba(0, 132, 130, 0.1);
    color: #008482;
    font-weight: 600;
  }