.sf-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1rem 2rem 1rem;
  min-height: 60vh;
}
.sf-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  justify-items: center;
  align-items: start;
}
.sf-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 380px;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(0, 0, 0, 0.05);
  cursor: pointer;
}
.sf-card:hover,
.sf-card:focus {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
  transform: translateY(-8px);
  border-color: rgba(33, 117, 188, 0.2);
}
.sf-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  border-radius: 16px 16px 0 0;
  background: #ffffff;
}
.sf-label {
  background: linear-gradient(135deg, #2175bc 0%, #1a5f9a 100%);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 600;
  text-align: center;
  padding: 0.4rem 1rem;
  letter-spacing: 0.3px;
  line-height: 1.3;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 45px;
  pointer-events: none;
}
@media (max-width: 768px) {
  .sf-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 0 1rem;
  }
  .sf-card {
    max-width: 100%;
  }
  .sf-img {
    height: 200px;
  }
  .sf-label {
    font-size: 1.3rem;
    padding: 0.4rem 1rem;
    min-height: 45px;
  }
}
@media (max-width: 480px) {
  .sf-main {
    padding: 1rem 0.5rem 2rem 0.5rem;
  }
  .sf-grid {
    gap: 1rem;
    padding: 0 0.5rem;
  }
  .sf-img {
    height: 160px;
  }
  .sf-label {
    font-size: 1.1rem;
    padding: 0.3rem 0.6rem;
    min-height: 30px;
  }
}

.sf-article-main {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.sf-article-hero {
  margin-bottom: 2rem;
  border-radius: 12px;
  overflow: hidden;
}

.sf-article-hero-img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  display: block;
}

.sf-article-content {
  background: #fff;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.sf-article-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid #2175bc;
}

.sf-article-title {
  font-size: 2rem;
  font-weight: 700;
  color: #2d3a4a;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.sf-article-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
  color: #666;
}

.sf-article-category {
  background: #2175bc;
  color: #fff;
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

.sf-article-body h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #2d3a4a;
  margin: 2rem 0 1rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #e6e6e6;
}

.sf-article-body p {
  font-size: 1.1rem;
  line-height: 1.6;
  color: #444;
  margin-bottom: 1.5rem;
  text-align: justify;
}

.sf-article-intro {
  font-size: 1.2rem;
  font-weight: 500;
  color: #2d3a4a;
  background: #ffffff;
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid #2175bc;
}

.sf-article-conclusion {
  background: #ffffff;
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid #e75b2b;
  margin-top: 2rem;
}

.sf-article-navigation {
  margin-top: 3rem;
  text-align: center;
}

.sf-article-navigation .btn {
  padding: 0.8rem 2rem;
  font-size: 1rem;
  border-radius: 8px;
}

@media (max-width: 768px) {
  .sf-article-main {
    padding: 1rem 0.5rem;
  }
  
  .sf-article-content {
    padding: 1.5rem;
  }
  
  .sf-article-title {
    font-size: 1.6rem;
  }
  
  .sf-article-hero-img {
    height: 200px;
  }
  
  .sf-article-body h2 {
    font-size: 1.3rem;
  }
  
  .sf-article-body p {
    font-size: 1rem;
  }
  
  .sf-article-intro {
    font-size: 1.1rem;
    padding: 1rem;
  }
}