/* wenliancloud.mom - Engineering Blueprint & Steel Truss */
:root {
  --bg: #F1F5F9;
  --surface: #FFFFFF;
  --primary: #0F172A;
  --primary-hover: #1E293B;
  --accent-orange: #EA580C;
  --blueprint-blue: #0284C7;
  --steel: #475569;
  --text: #0F172A;
  --muted: #64748B;
  --border: #CBD5E1;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 32px 32px;
}
a { color: var(--accent-orange); text-decoration: none; transition: all 0.2s; }
a:visited { color: var(--accent-orange); }
a:hover { color: var(--blueprint-blue); text-decoration: underline; }

.spec-ribbon {
  background: var(--primary);
  color: #38BDF8;
  font-size: 0.8rem;
  padding: 0.35rem 1.5rem;
  text-align: center;
  letter-spacing: 0.15em;
  border-bottom: 1px solid var(--blueprint-blue);
}
.site-header {
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 2px solid var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: -0.02em;
}
.spec-badge {
  background: var(--accent-orange);
  color: #FFF;
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.nav-links a {
  font-size: 0.95rem;
  color: var(--primary);
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border: 1px solid transparent;
}
.nav-links a:hover {
  border-color: var(--blueprint-blue);
  color: var(--blueprint-blue);
  text-decoration: none;
}
.nav-links .nav-hub-link { color: var(--accent-orange); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.6rem;
  font-weight: 800;
  font-size: 0.95rem;
  cursor: pointer;
  border-radius: 2px;
  border: 2px solid var(--primary);
  transition: all 0.2s ease;
}
.btn-primary { background: var(--accent-orange); border-color: var(--accent-orange); color: #FFF !important; }
.btn-primary:hover { background: #C2410C; border-color: #C2410C; text-decoration: none; }
.btn-secondary { background: var(--surface); color: var(--primary) !important; }
.btn-secondary:hover { border-color: var(--blueprint-blue); color: var(--blueprint-blue) !important; text-decoration: none; }

.hero-truss {
  max-width: 1200px;
  margin: 3.5rem auto 4rem auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}
.cad-tag {
  display: inline-block;
  background: #E0F2FE;
  border: 1px solid var(--blueprint-blue);
  color: var(--blueprint-blue);
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  margin-bottom: 1.25rem;
  font-weight: 700;
}
.hero-truss h1 {
  font-size: 2.8rem;
  line-height: 1.25;
  color: var(--primary);
  margin-bottom: 1.25rem;
  font-weight: 900;
}
.hero-truss .blueprint-desc {
  font-size: 1.1rem;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 2rem;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-cad-frame {
  background: var(--surface);
  border: 2px solid var(--primary);
  padding: 10px;
  box-shadow: 8px 8px 0 var(--steel);
}
.hero-illus { width: 100%; height: auto; display: block; }

@keyframes dataPulse {
  0%, 100% { transform: translateX(0); opacity: 0.4; }
  50% { transform: translateX(18px); opacity: 1; }
}
.data-pulse-flow { animation: dataPulse 3s ease-in-out infinite; }

.eng-section { max-width: 1200px; margin: 5rem auto; padding: 0 2rem; }
.eng-header {
  border-bottom: 2px solid var(--primary);
  padding-bottom: 0.75rem;
  margin-bottom: 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
}
.eng-header h2 { font-size: 2rem; font-weight: 900; color: var(--primary); }
.eng-header .cad-code { font-size: 0.85rem; color: var(--blueprint-blue); }

.specs-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.spec-box {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
  position: relative;
}
.spec-box::before { content: "+"; position: absolute; top: 8px; right: 12px; color: var(--accent-orange); }
.spec-box h3 { font-size: 1.25rem; color: var(--primary); margin-bottom: 0.6rem; }
.spec-box p { color: var(--muted); font-size: 0.95rem; }

.modules-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.module-card {
  background: var(--surface);
  border: 2px dashed var(--border);
  padding: 1.75rem;
}
.module-card h3 { font-size: 1.15rem; color: var(--primary); margin-bottom: 0.5rem; }
.module-card p { color: var(--muted); font-size: 0.9rem; }

.eng-table-wrap { overflow-x: auto; background: var(--surface); border: 2px solid var(--primary); }
.eng-table { width: 100%; border-collapse: collapse; text-align: left; }
.eng-table th, .eng-table td { padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border); font-size: 0.95rem; }
.eng-table th { background: var(--primary); color: #FFF; font-weight: 800; }
.eng-table td.price { font-size: 1.4rem; font-weight: 900; color: var(--accent-orange); }

.eng-faq-list { display: flex; flex-direction: column; gap: 1rem; max-width: 860px; margin: 0 auto; }
.eng-faq-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--blueprint-blue);
  padding: 1.5rem 1.8rem;
}
.eng-faq-card h3 { font-size: 1.15rem; color: var(--primary); margin-bottom: 0.4rem; }
.eng-faq-card p { color: var(--muted); font-size: 0.95rem; }

.qa-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.qa-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.75rem;
  position: relative;
}
.qa-card p { font-size: 0.95rem; color: var(--primary); margin-bottom: 1.25rem; }
.qa-stamp {
  display: inline-block;
  border: 1px solid #16A34A;
  color: #16A34A;
  font-size: 0.75rem;
  padding: 0.1rem 0.5rem;
  font-weight: 800;
  text-transform: uppercase;
}

.page-container { max-width: 880px; margin: 3.5rem auto; padding: 0 2rem; background: var(--surface); border: 1px solid var(--border); padding: 3rem 2.5rem; }
.article-header { border-bottom: 2px solid var(--primary); padding-bottom: 1.5rem; margin-bottom: 2.5rem; }
.article-header h1 { font-size: 2.3rem; color: var(--primary); line-height: 1.35; margin-bottom: 1rem; }
.article-meta { color: var(--muted); font-size: 0.9rem; display: flex; gap: 1.5rem; }
.article-body { font-size: 1.05rem; line-height: 1.85; }
.article-body h2 { font-size: 1.6rem; color: var(--primary); margin: 2.5rem 0 1rem 0; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
.article-body h3 { font-size: 1.25rem; color: var(--blueprint-blue); margin: 1.75rem 0 0.75rem 0; }
.article-body p { margin-bottom: 1.4rem; }

.site-footer { border-top: 2px solid var(--primary); background: var(--surface); padding: 3.5rem 2rem; margin-top: 6rem; }
.footer-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; gap: 1.5rem; }
.footer-links { display: flex; gap: 2.5rem; }
.footer-links a { font-size: 0.95rem; font-weight: 800; color: var(--primary); }
.footer-links a:hover { color: var(--accent-orange); }
.copyright { color: var(--muted); font-size: 0.85rem; }

@media (max-width: 768px) {
  .nav-container { flex-wrap: wrap; justify-content: center; padding: 1rem; }
  .nav-links { order: 3; width: 100%; justify-content: center; gap: 0.75rem; margin-top: 0.5rem; }
  .hero-truss { grid-template-columns: 1fr; gap: 2.5rem; margin: 2rem auto; }
  .hero-truss h1 { font-size: 2.1rem; }
  .specs-grid-3, .modules-grid-4, .qa-grid { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; justify-content: center; gap: 1.25rem; }
}