.blog-hero {
  min-height: 44vh; display: flex; align-items: center;
  padding: 7rem 2.5rem 3.5rem;
  background: var(--surface); position: relative; overflow: hidden;
}
.blog-hero-inner {
  max-width: 720px; margin: 0 auto; position: relative;
}
.blog-hero h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 400;
  line-height: 1.18; color: var(--ink);
  letter-spacing: -0.025em; margin-bottom: 1.2rem;
  opacity: 0; animation: up .7s ease .2s forwards;
}
.blog-hero h1 em { font-style: italic; color: var(--accent); }
.blog-hero-sub {
  font-size: 1rem; font-weight: 300; color: var(--ink-3);
  max-width: 540px; line-height: 1.75; margin-bottom: 2rem;
  opacity: 0; animation: up .7s ease .35s forwards;
}

.blog-meta {
  display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap;
  font-family: var(--mono); font-size: 0.62rem; font-weight: 400;
  color: var(--muted); letter-spacing: 0.04em;
  opacity: 0; animation: up .7s ease .45s forwards;
}
.blog-meta span { display: inline-flex; align-items: center; gap: 0.35rem; }
.blog-meta .meta-sep { color: var(--faint); }

.blog-content {
  max-width: 720px; margin: 0 auto;
  padding: 3rem 2.5rem 4rem;
}

.blog-content h2 {
  font-family: var(--serif);
  font-size: 1.6rem; font-weight: 400;
  color: var(--ink); line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 2.8rem 0 1.2rem;
  padding-bottom: 0.6rem;
  border-bottom: 1.5px solid var(--accent-wash);
}
.blog-content h2:first-child { margin-top: 0; }

.blog-content h3 {
  font-family: var(--sans);
  font-size: 1.15rem; font-weight: 600;
  color: var(--ink); line-height: 1.3;
  margin: 2rem 0 0.8rem;
}

.blog-content p {
  font-size: 0.95rem; font-weight: 300;
  color: var(--ink-3); line-height: 1.8;
  margin-bottom: 1.2rem;
}

.blog-content strong { color: var(--ink-2); font-weight: 500; }
.blog-content em { font-style: italic; color: var(--ink-3); }

.blog-content a {
  color: var(--accent); text-decoration: none;
  transition: text-decoration-color 0.2s;
  text-underline-offset: 2px;
}
.blog-content a:hover { text-decoration: underline; }

.blog-content ul,
.blog-content ol {
  margin: 0 0 1.4rem 1.4rem; padding: 0;
}
.blog-content ul { list-style: none; }
.blog-content ol { list-style: none; counter-reset: blog-ol; }

.blog-content ul li,
.blog-content ol li {
  font-size: 0.9rem; font-weight: 300; color: var(--ink-3);
  line-height: 1.75; padding: 0.25rem 0 0.25rem 1.1rem;
  position: relative;
}
.blog-content ul li::before {
  content: ''; position: absolute; left: 0; top: 0.72em;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent);
}
.blog-content ol li { counter-increment: blog-ol; }
.blog-content ol li::before {
  content: counter(blog-ol) '.';
  position: absolute; left: -0.2rem; top: 0.25rem;
  font-family: var(--mono); font-size: 0.68rem; font-weight: 600;
  color: var(--accent);
}

.blog-content table {
  display: block;
  width: 100%; max-width: 100%; margin: 1.8rem 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--surface); border: 1px solid var(--border-fine);
  border-radius: var(--radius-lg);
  border-collapse: separate; border-spacing: 0;
}
.blog-content thead th {
  font-family: var(--mono); font-size: 0.62rem; font-weight: 500;
  color: var(--accent); letter-spacing: 0.08em; text-transform: uppercase;
  padding: 1rem 1.4rem; text-align: left;
  background: var(--surface-2); border-bottom: 1px solid var(--border-fine);
}
.blog-content tbody td {
  padding: 0.9rem 1.4rem; font-size: 0.85rem; font-weight: 300;
  color: var(--ink-3); border-bottom: 1px solid var(--border-fine);
  vertical-align: top;
}
.blog-content tbody tr:last-child td { border-bottom: none; }
.blog-content tbody tr:nth-child(even) td { background: var(--surface-2); }
.blog-content tbody td:first-child { font-weight: 500; color: var(--ink-2); font-size: 0.82rem; }
.blog-content tbody td strong { color: var(--ink); font-weight: 500; }

.blog-callout {
  background: var(--accent-wash);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.3rem 1.5rem;
  margin: 1.8rem 0;
}
.blog-callout p {
  font-size: 0.88rem; font-weight: 400; color: var(--ink-2);
  line-height: 1.7; margin: 0;
}
.blog-callout p + p { margin-top: 0.6rem; }
.blog-callout strong { color: var(--ink); font-weight: 600; }

.blog-cta {
  background: var(--accent-wash);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  margin: 2.5rem 0;
  text-align: center;
}
.blog-cta h3 {
  font-family: var(--serif);
  font-size: 1.4rem; font-weight: 400;
  color: var(--ink); margin: 0 0 0.6rem;
  letter-spacing: -0.01em;
}
.blog-cta h3 em { font-style: italic; color: var(--accent); }
.blog-cta p {
  font-size: 0.88rem; font-weight: 300; color: var(--ink-3);
  line-height: 1.7; margin: 0 0 1.5rem; max-width: 480px;
  margin-left: auto; margin-right: auto;
}
.blog-cta .btn-primary { display: inline-flex; }

.blog-faq {
  margin: 2.5rem 0;
}
.blog-faq-item {
  border-bottom: 1px solid var(--border-fine);
  padding: 1.2rem 0;
}
.blog-faq-item:first-child { border-top: 1px solid var(--border-fine); }
.blog-faq-q {
  font-family: var(--sans); font-size: 0.92rem; font-weight: 500;
  color: var(--ink); margin: 0 0 0.6rem;
  line-height: 1.4;
}
.blog-faq-a p {
  font-size: 0.88rem; font-weight: 300; color: var(--ink-3);
  line-height: 1.75; margin: 0;
}
.blog-faq-a p + p { margin-top: 0.6rem; }

.blog-toc {
  background: var(--surface-2);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.4rem 1.6rem;
  margin: 0 0 2.5rem;
}
.blog-toc-title {
  font-family: var(--mono); font-size: 0.6rem; font-weight: 500;
  color: var(--accent); letter-spacing: 0.1em; text-transform: uppercase;
  margin-bottom: 0.8rem;
}
.blog-toc ul {
  list-style: none; margin: 0; padding: 0;
}
.blog-toc li {
  padding: 0.3rem 0;
}
.blog-toc a {
  font-size: 0.82rem; font-weight: 400; color: var(--ink-3);
  text-decoration: none; transition: color 0.2s;
}
.blog-toc a:hover { color: var(--accent); }

.blog-related {
  background: var(--bg); border-top: 1px solid var(--border-fine);
  padding: 4rem 2.5rem;
}
.blog-related-inner { max-width: 960px; margin: 0 auto; }
.blog-related-title {
  font-family: var(--serif);
  font-size: 1.5rem; font-weight: 400;
  color: var(--ink); margin-bottom: 2rem;
  letter-spacing: -0.015em;
}
.blog-related-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--border-fine);
  border: 1px solid var(--border-fine);
  border-radius: var(--radius-lg); overflow: hidden;
}
.blog-related-card {
  background: var(--surface); padding: 1.5rem;
  text-decoration: none; display: block;
  transition: background 0.3s;
}
.blog-related-card:hover { background: var(--surface-2); }
.blog-related-card-meta {
  font-family: var(--mono); font-size: 0.58rem; font-weight: 400;
  color: var(--muted); letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}
.blog-related-card h4 {
  font-size: 0.88rem; font-weight: 600; color: var(--ink);
  margin-bottom: 0.4rem; line-height: 1.35;
}
.blog-related-card p {
  font-size: 0.78rem; font-weight: 300; color: var(--ink-3); line-height: 1.6;
}

.blog-index-hero {
  min-height: 38vh; display: flex; align-items: center;
  padding: 7rem 2.5rem 3.5rem;
  background: var(--surface); position: relative; overflow: hidden;
}
.blog-index-hero-inner {
  max-width: 720px; margin: 0 auto; position: relative;
}
.blog-index-hero h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 400;
  line-height: 1.18; color: var(--ink);
  letter-spacing: -0.025em; margin-bottom: 1rem;
  opacity: 0; animation: up .7s ease .2s forwards;
}
.blog-index-hero h1 em { font-style: italic; color: var(--accent); }
.blog-index-hero p {
  font-size: 1rem; font-weight: 300; color: var(--ink-3);
  max-width: 540px; line-height: 1.75;
  opacity: 0; animation: up .7s ease .35s forwards;
}

.blog-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  max-width: 960px; margin: 0 auto;
  padding: 0 2.5rem 4rem;
}

.blog-card {
  background: var(--surface);
  border: 1px solid var(--border-fine);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  text-decoration: none; display: flex; flex-direction: column;
  transition: box-shadow 0.3s, transform 0.3s;
}
.blog-card:hover {
  box-shadow: var(--shadow-md); transform: translateY(-2px);
}
.blog-card-meta {
  font-family: var(--mono); font-size: 0.58rem; font-weight: 400;
  color: var(--muted); letter-spacing: 0.04em;
  margin-bottom: 0.6rem;
}
.blog-card h3 {
  font-size: 0.95rem; font-weight: 600; color: var(--ink);
  line-height: 1.35; margin-bottom: 0.5rem;
}
.blog-card p {
  font-size: 0.8rem; font-weight: 300; color: var(--ink-3);
  line-height: 1.65; flex: 1;
}
.blog-card-link {
  font-family: var(--mono); font-size: 0.62rem; font-weight: 500;
  color: var(--accent); letter-spacing: 0.04em;
  margin-top: 1rem; display: inline-flex; align-items: center; gap: 0.3rem;
  transition: gap 0.2s;
}
.blog-card:hover .blog-card-link { gap: 0.5rem; }

@media (max-width: 900px) {
  .blog-hero { padding: 6rem 1.5rem 3rem; }
  .blog-index-hero { padding: 6rem 1.5rem 3rem; }
  .blog-content { padding: 2.5rem 1.5rem 3.5rem; }
  .blog-grid { grid-template-columns: 1fr 1fr; padding: 0 1.5rem 3rem; }
  .blog-related { padding: 3rem 1.5rem; }
  .blog-related-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .blog-hero h1 { font-size: clamp(1.7rem, 6vw, 2.2rem); }
  .blog-index-hero h1 { font-size: clamp(1.7rem, 6vw, 2.2rem); }
  .blog-content h2 { font-size: 1.35rem; }
  .blog-content { padding: 2rem 1.2rem 3rem; }
  .blog-grid { grid-template-columns: 1fr; padding: 0 1.2rem 2.5rem; }
  .blog-related-grid { grid-template-columns: 1fr; }
  .blog-meta { gap: 0.6rem; }
  .blog-content table { font-size: 0.8rem; }
  .blog-content thead th,
  .blog-content tbody td { padding: 0.7rem 0.8rem; }
  .blog-cta { padding: 2rem 1.2rem; }
}