:root {
  --article-primary: #1a5276;
  --article-secondary: #2874a6;
  --article-accent: #f1c40f;
  --article-bg-page: #f9f9f9;
  --article-bg-soft-blue: #e8f4f8;
  --article-bg-soft-green: #e8f8e8;
  --article-bg-soft-red: #fff0f0;
  --article-text-strong: #333;
  --article-text-body: #555;
  --article-border: #d9d9d9;
  --article-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  --article-radius: 8px;
  --article-transition: all 0.3s ease;
}

.article-layout {
  color: var(--article-text-strong);
  line-height: 1.7;
}

.article-layout p {
  font-size: 16px;
  line-height: 1.8;
}

.article-layout strong {
  color: var(--article-primary);
}

.article-layout mark {
  background-color: rgba(241, 196, 15, 0.3);
  padding: 2px 5px;
  border-radius: 3px;
}

.bg-triangle-gradation {
  display: none !important;
}

h1.ttl-basic {
  display: none;
}

.article-header {
  text-align: center;
  margin-bottom: 40px;
}

.article-updated-date {
  text-align: right;
  font-style: italic;
  margin-top: 10px;
}

.article-highlight {
  background-color: var(--article-accent);
  padding: 2px 5px;
  border-radius: 3px;
  font-weight: bold;
}

.article-layout h1,
.article-layout h2,
.article-layout h3 {
  color: var(--article-primary);
}

.article-layout h2 {
  border-left: 5px solid var(--article-secondary);
  padding-left: 10px;
  margin-top: 40px;
}

.article-section-intro,
.article-callout,
.article-panel,
.article-toc,
.article-system,
.article-conclusion {
  background-color: #fff;
  padding: 20px;
  border-radius: var(--article-radius);
  box-shadow: var(--article-shadow);
}

.article-section-intro {
  background-color: var(--article-bg-soft-blue);
  margin-bottom: 30px;
}

.article-toc {
  margin: 30px 0;
}

.article-toc h3 {
  margin-top: 0;
  border-bottom: 2px solid var(--article-secondary);
  padding-bottom: 10px;
}

.article-toc ul {
  list-style-type: none;
  padding-left: 0;
}

.article-toc li {
  margin-bottom: 10px;
  padding-left: 20px;
  position: relative;
}

.article-toc li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 6px solid var(--article-secondary);
}

.article-notice-list,
.article-risk-list,
.article-points-list {
  margin-top: 20px;
}

.article-notice-item,
.article-risk-item {
  padding: 15px;
  border-radius: 5px;
  margin-bottom: 15px;
}

.article-notice-item {
  background-color: var(--article-bg-soft-blue);
  border-left: 4px solid var(--article-secondary);
}

.article-risk-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 20px;
}

.article-risk-item {
  flex: 1 1 300px;
  background-color: var(--article-bg-soft-red);
  border-left: 4px solid #d35400;
}

.article-card-grid,
.article-feature-grid,
.article-merit-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 30px;
}

.article-card,
.article-feature-card,
.article-merit-card,
.article-faq-item {
  background-color: #fff;
  border-radius: var(--article-radius);
  box-shadow: var(--article-shadow);
  padding: 20px;
  transition: var(--article-transition);
}

.article-card,
.article-feature-card {
  flex: 1 1 400px;
}

.article-merit-card {
  flex: 1 1 250px;
  text-align: center;
}

.article-card:hover,
.article-feature-card:hover,
.article-merit-card:hover {
  transform: translateY(-5px);
}

.article-card-header {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
}

.article-card-icon {
  width: 50px;
  height: 50px;
  background-color: var(--article-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 15px;
  color: white;
  font-size: 24px;
}

.article-card-title,
.article-feature-title,
.article-merit-title {
  font-weight: bold;
  color: var(--article-secondary);
}

.article-card-title {
  font-size: 1.2em;
}

.article-card-content,
.article-feature-content,
.article-merit-desc {
  color: var(--article-text-body);
}

.article-responsive-img {
  max-width: 100%;
  height: auto;
}

.article-feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.article-feature-card {
  position: relative;
  overflow: hidden;
}

.article-feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background-color: var(--article-secondary);
}

.article-feature-title {
  font-size: 1.2em;
  margin-bottom: 15px;
  padding-left: 10px;
}

.article-system {
  background-color: #f5f9fa;
  margin: 30px 0;
}

.article-system-image {
  max-height: 800px;
  width: auto;
  max-width: 800px;
  margin: 20px auto;
  display: block;
  border-radius: var(--article-radius);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.article-table th,
.article-table td {
  border: 1px solid var(--article-border);
  padding: 10px;
  text-align: left;
}

.article-table th {
  background-color: var(--article-secondary);
  color: white;
}

.article-table tr:nth-child(even) {
  background-color: #f2f2f2;
}

.article-merit-number {
  font-size: 2.5em;
  font-weight: bold;
  color: var(--article-secondary);
  margin-bottom: 10px;
}

.article-merit-title {
  font-size: 1.1em;
  margin-bottom: 10px;
  border-bottom: 2px solid var(--article-accent);
  padding-bottom: 10px;
  display: inline-block;
}

.article-note {
  font-size: 0.9em;
  color: #777;
  font-style: italic;
  text-align: right;
}

.article-conclusion {
  background-color: var(--article-bg-soft-green);
  margin-top: 30px;
}

.article-cta {
  display: inline-block;
  background-color: var(--article-accent);
  color: var(--article-text-strong);
  padding: 12px 24px;
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
  margin-top: 20px;
  transition: var(--article-transition);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.article-cta:focus {
  outline: 3px solid rgba(26, 82, 118, 0.5);
}

.article-cta:hover {
  background-color: #d4ac0d;
  transform: scale(1.05);
}

@media (max-width: 768px) {
  .article-card-grid,
  .article-merit-grid {
    flex-direction: column;
  }

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

  .article-card,
  .article-feature-card,
  .article-merit-card {
    flex: 1 1 100%;
  }

  .article-card-header {
    flex-wrap: wrap;
  }

  .article-card-icon {
    width: 40px;
    height: 40px;
    font-size: 20px;
    margin-bottom: 10px;
  }

  .article-system-image {
    width: 100%;
    height: auto !important;
  }

  .article-toc li {
    margin-bottom: 15px;
  }

  .article-layout h2 {
    font-size: 1.4em;
  }
}

@media print {
  .article-layout {
    background-color: white;
    color: black;
  }

  .article-cta {
    display: none;
  }

  .article-toc,
  .article-card,
  .article-feature-card,
  .article-merit-card,
  .article-faq-item {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .article-system-image {
    max-width: 100%;
    height: auto !important;
  }
}