/* ==========================================================================
   BAUHAUS DESIGN SYSTEM - peiqian-jc.homes
   Inspired by Bauhaus Functionalism: Red, Blue, Yellow, Deep Black, Crisp White
   Pure geometric layouts, sharp borders, bold typographic hierarchy
   ========================================================================== */

:root {
  --bh-bg: #f8f7f2;
  --bh-surface: #ffffff;
  --bh-black: #121212;
  --bh-border: #121212;
  --bh-red: #e63946;
  --bh-blue: #1d3557;
  --bh-blue-accent: #2a6fdb;
  --bh-yellow: #ffb703;
  --bh-yellow-light: #fff3b0;
  --bh-gray-50: #fbfbf9;
  --bh-gray-100: #f1f0eb;
  --bh-gray-200: #e2e0d8;
  --bh-gray-600: #5c5a54;
  --bh-gray-800: #2b2a27;

  --bh-border-width: 2.5px;
  --bh-shadow: 4px 4px 0px var(--bh-black);
  --bh-shadow-lg: 8px 8px 0px var(--bh-black);
  --bh-shadow-sm: 2px 2px 0px var(--bh-black);

  --font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--bh-bg);
  color: var(--bh-black);
  font-family: var(--font-display);
  line-height: 1.68;
  font-weight: 400;
  overflow-x: hidden;
}

/* ================= Typography ================= */
h1, h2, h3, h4, h5, h6 {
  color: var(--bh-black);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 4.5vw, 3.6rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
h4 { font-size: 1.18rem; }

p {
  margin-bottom: 1.2rem;
  color: var(--bh-gray-800);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.18s ease-in-out;
}

/* ================= Geometry Accents ================= */
.bh-circle {
  width: 28px;
  height: 28px;
  background-color: var(--bh-yellow);
  border: var(--bh-border-width) solid var(--bh-black);
  border-radius: 50%;
  display: inline-block;
}

.bh-triangle {
  width: 0;
  height: 0;
  border-left: 14px solid transparent;
  border-right: 14px solid transparent;
  border-bottom: 24px solid var(--bh-red);
  display: inline-block;
}

.bh-square {
  width: 24px;
  height: 24px;
  background-color: var(--bh-blue-accent);
  border: var(--bh-border-width) solid var(--bh-black);
  display: inline-block;
}

/* Floating Bauhaus Elements */
.bh-floating-shape {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

/* ================= Global Header & Navbar ================= */
.bh-navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bh-surface);
  border-bottom: var(--bh-border-width) solid var(--bh-black);
  box-shadow: 0 4px 0 rgba(0,0,0,0.05);
}

.bh-nav-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.bh-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.bh-logo-symbol {
  display: flex;
  align-items: center;
  gap: 4px;
}

.bh-logo-symbol span:nth-child(1) {
  width: 14px;
  height: 14px;
  background-color: var(--bh-yellow);
  border: 2px solid var(--bh-black);
  border-radius: 50%;
}
.bh-logo-symbol span:nth-child(2) {
  width: 14px;
  height: 14px;
  background-color: var(--bh-red);
  border: 2px solid var(--bh-black);
  transform: rotate(45deg);
}
.bh-logo-symbol span:nth-child(3) {
  width: 14px;
  height: 14px;
  background-color: var(--bh-blue-accent);
  border: 2px solid var(--bh-black);
}

.bh-nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 1.8rem;
}

.bh-nav-link {
  font-weight: 700;
  font-size: 0.95rem;
  position: relative;
  padding: 0.25rem 0;
}

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

.bh-nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--bh-red);
  transition: width 0.2s ease;
}

.bh-nav-link:hover::after,
.bh-nav-link.active::after {
  width: 100%;
}

.bh-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--bh-black);
  color: #ffffff !important;
  font-weight: 800;
  font-size: 0.95rem;
  padding: 0.65rem 1.4rem;
  border: var(--bh-border-width) solid var(--bh-black);
  box-shadow: var(--bh-shadow);
  cursor: pointer;
  text-transform: uppercase;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.bh-btn-primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--bh-black);
  background-color: #000000;
}

.bh-btn-primary:active {
  transform: translate(2px, 2px);
  box-shadow: var(--bh-shadow-sm);
}

.bh-btn-yellow {
  background-color: var(--bh-yellow);
  color: var(--bh-black) !important;
}

.bh-btn-red {
  background-color: var(--bh-red);
  color: #ffffff !important;
}

.bh-btn-blue {
  background-color: var(--bh-blue-accent);
  color: #ffffff !important;
}

.bh-btn-outline {
  background-color: var(--bh-surface);
  color: var(--bh-black) !important;
  border: var(--bh-border-width) solid var(--bh-black);
}

.bh-mobile-toggle {
  display: none;
  background: none;
  border: var(--bh-border-width) solid var(--bh-black);
  padding: 6px 10px;
  cursor: pointer;
  font-weight: 800;
  box-shadow: var(--bh-shadow-sm);
}

/* ================= Containers & Sections ================= */
.bh-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
}

.bh-section {
  padding: 5rem 0;
  position: relative;
  border-bottom: var(--bh-border-width) solid var(--bh-black);
}

.bh-section:nth-child(even) {
  background-color: #ffffff;
}

.bh-section-header {
  margin-bottom: 3.5rem;
}

.bh-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 800;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.75rem;
  border: var(--bh-border-width) solid var(--bh-black);
  background-color: var(--bh-yellow);
  box-shadow: var(--bh-shadow-sm);
  margin-bottom: 1rem;
}

.bh-badge-blue { background-color: #dbeafe; color: #1e40af; }
.bh-badge-red { background-color: #fee2e2; color: #991b1b; }
.bh-badge-yellow { background-color: var(--bh-yellow-light); color: #854d0e; }

/* ================= Hero Section ================= */
.bh-hero {
  padding: 5.5rem 0 4.5rem;
  background: radial-gradient(circle at 90% 15%, rgba(255, 183, 3, 0.22) 0%, transparent 40%),
              radial-gradient(circle at 10% 85%, rgba(42, 111, 219, 0.12) 0%, transparent 45%),
              var(--bh-bg);
  position: relative;
  overflow: hidden;
}

.bh-hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
}

.bh-hero-title {
  font-size: clamp(2.4rem, 4.8vw, 4rem);
  line-height: 1.14;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.bh-hero-title mark {
  background-color: var(--bh-yellow);
  padding: 0 0.35rem;
  border: 2px solid var(--bh-black);
  box-shadow: 3px 3px 0 var(--bh-black);
}

.bh-hero-desc {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--bh-gray-800);
  margin-bottom: 2.2rem;
  max-width: 640px;
}

.bh-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-bottom: 2.5rem;
}

.bh-hero-specs {
  display: flex;
  gap: 2rem;
  border-top: var(--bh-border-width) solid var(--bh-black);
  padding-top: 1.5rem;
}

.bh-spec-item strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 900;
  line-height: 1.1;
}

.bh-spec-item span {
  font-size: 0.82rem;
  color: var(--bh-gray-600);
  text-transform: uppercase;
  font-weight: 700;
}

/* Bauhaus Hero Graphic Box (Inspired by Image 2) */
.bh-bauhaus-box {
  background: var(--bh-surface);
  border: 3.5px solid var(--bh-black);
  padding: 2.5rem;
  box-shadow: var(--bh-shadow-lg);
  position: relative;
}

.bh-corner-accent {
  position: absolute;
  width: 32px;
  height: 32px;
  border: 3px solid var(--bh-black);
}
.bh-corner-top-left {
  top: -16px;
  left: -16px;
  background-color: var(--bh-yellow);
  border-radius: 50%;
}
.bh-corner-bottom-right {
  bottom: -16px;
  right: -16px;
  background-color: var(--bh-blue-accent);
}

.bh-art-header {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.bh-art-subtitle {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--bh-gray-600);
  margin-bottom: 1.8rem;
  letter-spacing: 0.15em;
}

.bh-art-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.bh-art-stripe {
  height: 10px;
  display: flex;
  margin-top: 1.5rem;
  border: 2px solid var(--bh-black);
}

.bh-art-stripe span:nth-child(1) { flex: 2; background-color: var(--bh-black); }
.bh-art-stripe span:nth-child(2) { flex: 3; background-color: var(--bh-red); }
.bh-art-stripe span:nth-child(3) { flex: 2; background-color: var(--bh-yellow); }
.bh-art-stripe span:nth-child(4) { flex: 3; background-color: var(--bh-blue-accent); }

/* ================= Advantage Cards ================= */
.bh-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 2rem;
}

.bh-card {
  background: var(--bh-surface);
  border: var(--bh-border-width) solid var(--bh-black);
  padding: 2rem;
  box-shadow: var(--bh-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.bh-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--bh-shadow-lg);
}

.bh-card-icon {
  width: 48px;
  height: 48px;
  border: var(--bh-border-width) solid var(--bh-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 900;
  margin-bottom: 1.25rem;
  box-shadow: var(--bh-shadow-sm);
}

.bh-card-icon-yellow { background: var(--bh-yellow); }
.bh-card-icon-red { background: var(--bh-red); color: white; }
.bh-card-icon-blue { background: var(--bh-blue-accent); color: white; }

.bh-card-title {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.bh-card-desc {
  font-size: 0.95rem;
  color: var(--bh-gray-800);
  line-height: 1.6;
}

/* ================= Pricing Table (Image 1 replica) ================= */
.bh-pricing-table {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.bh-plan-row {
  display: grid;
  grid-template-columns: 240px 1.2fr 1.6fr 220px;
  align-items: center;
  gap: 1.5rem;
  background: var(--bh-surface);
  border: var(--bh-border-width) solid var(--bh-black);
  border-left: 8px solid var(--bh-black);
  padding: 1.6rem 2rem;
  box-shadow: var(--bh-shadow);
  position: relative;
  transition: transform 0.2s ease;
}

.bh-plan-row:hover {
  transform: translateX(4px);
}

.bh-plan-row.plan-starter { border-left-color: #06b6d4; }
.bh-plan-row.plan-standard {
  border-left-color: var(--bh-blue-accent);
  background: #111827;
  color: #ffffff;
}
.bh-plan-row.plan-standard h3,
.bh-plan-row.plan-standard p,
.bh-plan-row.plan-standard li {
  color: #f9fafb !important;
}
.bh-plan-row.plan-pro { border-left-color: #10b981; }
.bh-plan-row.plan-ultra { border-left-color: #f97316; }

.bh-popular-tag {
  position: absolute;
  top: 0;
  right: 0;
  background-color: #3b82f6;
  color: white;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 12px;
  border-bottom-left-radius: 4px;
}

.bh-plan-tag {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
  display: inline-block;
}

.bh-plan-starter .bh-plan-tag { color: #0891b2; }
.bh-plan-standard .bh-plan-tag { color: #93c5fd; }
.bh-plan-pro .bh-plan-tag { color: #059669; }
.bh-plan-ultra .bh-plan-tag { color: #ea580c; }

.bh-plan-title {
  font-size: 1.45rem;
  font-weight: 900;
}

.bh-plan-title small {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--bh-gray-600);
}
.bh-plan-standard .bh-plan-title small {
  color: #9ca3af;
}

.bh-plan-desc {
  font-size: 0.95rem;
  color: var(--bh-gray-600);
}

.bh-plan-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem 1.2rem;
  list-style: none;
}

.bh-plan-features li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--bh-gray-800);
}

.bh-plan-features li::before {
  content: "";
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.bh-plan-price-box {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.6rem;
}

.bh-plan-price {
  font-size: 2.1rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--bh-black);
}

.bh-plan-standard .bh-plan-price {
  color: #60a5fa;
}

.bh-plan-price span {
  font-size: 1rem;
  font-weight: 600;
}

.bh-plan-btn {
  width: 100%;
  padding: 0.6rem 1rem;
  font-weight: 800;
  font-size: 0.9rem;
  border: 2px solid var(--bh-black);
  cursor: pointer;
  box-shadow: var(--bh-shadow-sm);
  background: white;
  color: var(--bh-black);
  text-align: center;
  display: block;
}

.bh-plan-standard .bh-plan-btn {
  background: #3b82f6;
  color: #ffffff;
  border-color: #3b82f6;
}

.bh-plan-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--bh-shadow);
}

/* ================= Article Showcase Grid ================= */
.bh-articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 2rem;
}

.bh-article-card {
  background: var(--bh-surface);
  border: var(--bh-border-width) solid var(--bh-black);
  padding: 1.75rem;
  box-shadow: var(--bh-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.bh-article-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--bh-shadow-lg);
}

/* Special highlight for the 10th Card (The flagship engineering analysis) */
.bh-article-card.card-flagship {
  border-width: 3.5px;
  background: #fffdfa;
  border-color: var(--bh-black);
  box-shadow: 6px 6px 0px var(--bh-blue-accent);
}

.bh-flagship-pulse {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  background-color: var(--bh-red);
  color: white;
  padding: 2px 8px;
  border: 1.5px solid var(--bh-black);
  margin-bottom: 0.8rem;
}

.bh-flagship-pulse::before {
  content: "";
  width: 6px;
  height: 6px;
  background: #ffffff;
  border-radius: 50%;
  animation: bh-pulse 1.4s infinite ease-in-out;
}

@keyframes bh-pulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.4); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.bh-article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.82rem;
  color: var(--bh-gray-600);
  margin-bottom: 0.8rem;
  flex-wrap: wrap;
}

.bh-article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.bh-article-title {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 0.8rem;
}

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

.bh-article-excerpt {
  font-size: 0.92rem;
  color: var(--bh-gray-800);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.bh-article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1.5px dashed var(--bh-gray-200);
  padding-top: 1rem;
}

.bh-article-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.bh-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 6px;
  background-color: var(--bh-gray-100);
  border: 1px solid var(--bh-black);
}

.bh-read-more {
  font-size: 0.88rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.bh-read-more:hover {
  text-decoration: underline;
  color: var(--bh-blue-accent);
}

/* ================= FAQ Accordion ================= */
.bh-faq-controls {
  margin-bottom: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.bh-faq-search {
  flex: 1;
  min-width: 260px;
  padding: 0.8rem 1.2rem;
  font-size: 1rem;
  font-family: inherit;
  border: var(--bh-border-width) solid var(--bh-black);
  background: white;
  box-shadow: var(--bh-shadow-sm);
  outline: none;
}

.bh-faq-search:focus {
  box-shadow: var(--bh-shadow);
  border-color: var(--bh-blue-accent);
}

.bh-faq-category-btn {
  padding: 0.8rem 1.2rem;
  font-weight: 800;
  font-size: 0.9rem;
  border: var(--bh-border-width) solid var(--bh-black);
  background: var(--bh-gray-100);
  cursor: pointer;
  box-shadow: var(--bh-shadow-sm);
  transition: all 0.15s ease;
}

.bh-faq-category-btn.active,
.bh-faq-category-btn:hover {
  background: var(--bh-yellow);
  transform: translate(-2px, -2px);
  box-shadow: var(--bh-shadow);
}

.bh-faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.bh-faq-item {
  background: var(--bh-surface);
  border: var(--bh-border-width) solid var(--bh-black);
  box-shadow: var(--bh-shadow-sm);
  transition: box-shadow 0.15s ease;
}

.bh-faq-item:hover {
  box-shadow: var(--bh-shadow);
}

.bh-faq-question {
  padding: 1.25rem 1.75rem;
  font-size: 1.12rem;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.bh-faq-icon {
  width: 24px;
  height: 24px;
  border: 2px solid var(--bh-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.2rem;
  background-color: var(--bh-yellow);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.bh-faq-item.active .bh-faq-icon {
  transform: rotate(45deg);
  background-color: var(--bh-red);
  color: white;
}

.bh-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease-out, padding 0.25s ease;
  padding: 0 1.75rem;
  background: var(--bh-gray-50);
  border-top: 0px solid var(--bh-black);
}

.bh-faq-item.active .bh-faq-answer {
  max-height: 800px;
  padding: 1.25rem 1.75rem 1.5rem;
  border-top: 1.5px solid var(--bh-gray-200);
}

.bh-faq-answer p:last-child {
  margin-bottom: 0;
}

/* ================= CTA Banner ================= */
.bh-cta-banner {
  background: var(--bh-black);
  color: #ffffff;
  padding: 4rem 2rem;
  border: var(--bh-border-width) solid var(--bh-black);
  box-shadow: var(--bh-shadow-lg);
  margin: 4rem 0;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2.5rem;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.bh-cta-banner h2 {
  color: #ffffff;
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  margin-bottom: 1rem;
}

.bh-cta-banner p {
  color: #d1d5db;
  font-size: 1.05rem;
}

.bh-cta-box-action {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1rem;
}

/* ================= Footer ================= */
.bh-footer {
  background-color: #ffffff;
  border-top: var(--bh-border-width) solid var(--bh-black);
  padding: 4rem 0 2rem;
}

.bh-footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.bh-footer-title {
  font-size: 1rem;
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.bh-footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.bh-footer-links a {
  color: var(--bh-gray-600);
  font-size: 0.92rem;
  font-weight: 500;
}

.bh-footer-links a:hover {
  color: var(--bh-black);
  transform: translateX(3px);
  display: inline-block;
}

.bh-footer-bottom {
  border-top: var(--bh-border-width) solid var(--bh-black);
  padding-top: 1.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--bh-gray-600);
}

/* ================= Single Article / Post View ================= */
.bh-article-page-header {
  padding: 4rem 0 2.5rem;
  background: #ffffff;
  border-bottom: var(--bh-border-width) solid var(--bh-black);
}

.bh-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--bh-gray-600);
}

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

.bh-article-content-wrapper {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 3.5rem;
  padding: 3.5rem 0;
}

.bh-article-body {
  font-size: 1.05rem;
  line-height: 1.82;
  color: #1f2937;
}

.bh-article-body h2 {
  margin: 2.8rem 0 1.2rem;
  padding-bottom: 0.6rem;
  border-bottom: 2.5px solid var(--bh-black);
}

.bh-article-body h3 {
  margin: 2rem 0 0.9rem;
  color: var(--bh-gray-800);
}

.bh-article-body p {
  margin-bottom: 1.4rem;
}

.bh-article-body ul, 
.bh-article-body ol {
  margin-bottom: 1.6rem;
  padding-left: 1.5rem;
}

.bh-article-body li {
  margin-bottom: 0.5rem;
}

.bh-table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border: var(--bh-border-width) solid var(--bh-black);
  box-shadow: var(--bh-shadow);
}

.bh-data-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  text-align: left;
  font-size: 0.92rem;
}

.bh-data-table th, 
.bh-data-table td {
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--bh-gray-200);
}

.bh-data-table th {
  background-color: var(--bh-black);
  color: white;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.bh-data-table tr:nth-child(even) {
  background-color: var(--bh-gray-50);
}

.bh-data-table tr:hover {
  background-color: #fff9e6;
}

/* Code Snippet Blocks */
.bh-code-block {
  margin: 1.8rem 0;
  border: var(--bh-border-width) solid var(--bh-black);
  box-shadow: var(--bh-shadow);
  background: #111827;
  color: #f3f4f6;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  overflow: hidden;
}

.bh-code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #1f2937;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid #374151;
  font-size: 0.78rem;
  color: #9ca3af;
  text-transform: uppercase;
}

.bh-code-pre {
  padding: 1.25rem;
  overflow-x: auto;
  line-height: 1.6;
}

.bh-callout {
  border-left: 6px solid var(--bh-yellow);
  background-color: #fffdf5;
  border-top: var(--bh-border-width) solid var(--bh-black);
  border-right: var(--bh-border-width) solid var(--bh-black);
  border-bottom: var(--bh-border-width) solid var(--bh-black);
  padding: 1.5rem;
  margin: 2rem 0;
  box-shadow: var(--bh-shadow-sm);
}

.bh-callout-blue {
  border-left-color: var(--bh-blue-accent);
  background-color: #f0f7ff;
}

.bh-callout-red {
  border-left-color: var(--bh-red);
  background-color: #fff5f5;
}

.bh-sidebar-card {
  background: white;
  border: var(--bh-border-width) solid var(--bh-black);
  padding: 1.75rem;
  box-shadow: var(--bh-shadow);
  margin-bottom: 2rem;
  position: sticky;
  top: 90px;
}

/* Responsive queries */
@media (max-width: 992px) {
  .bh-hero-grid { grid-template-columns: 1fr; }
  .bh-plan-row { grid-template-columns: 1fr; gap: 1rem; }
  .bh-plan-price-box { align-items: flex-start; text-align: left; }
  .bh-cta-banner { grid-template-columns: 1fr; text-align: left; }
  .bh-cta-box-action { align-items: flex-start; }
  .bh-footer-grid { grid-template-columns: 1fr 1fr; }
  .bh-article-content-wrapper { grid-template-columns: 1fr; }
  .bh-sidebar-card { position: static; }
}

@media (max-width: 768px) {
  .bh-nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: var(--bh-border-width) solid var(--bh-black);
    box-shadow: var(--bh-shadow-lg);
  }
  .bh-nav-menu.active { display: flex; }
  .bh-mobile-toggle { display: block; }
  .bh-hero-specs { flex-direction: column; gap: 1rem; }
  .bh-plan-features { grid-template-columns: 1fr; }
  .bh-footer-grid { grid-template-columns: 1fr; }
}