/* 良心云 liangxin-yun.homes — Smart Architectural Home & Sunlit Atrium Design */
:root {
  --bg-travertine: #F5F3EF;
  --bg-travertine-deep: #EBE7DF;
  --surface-white: #FFFFFF;
  --surface-warm: #FAF8F5;
  --slate-ink: #1E242B;
  --slate-muted: #525B66;
  --slate-light: #7B8490;
  --cobalt-blue: #2563EB;
  --cobalt-dark: #1D4ED8;
  --cedar-wood: #C26D3A;
  --cedar-hover: #A35526;
  --cedar-soft: #FDF5F0;
  --courtyard-emerald: #16A34A;
  --emerald-soft: #ECFDF5;
  --border-stone: #DDD7CC;
  --border-structural: #C8C0B3;
  --shadow-atrium: 0 14px 34px -8px rgba(30, 36, 43, 0.07), 0 4px 12px -2px rgba(30, 36, 43, 0.04);
  --shadow-cantilever: 0 20px 42px -12px rgba(30, 36, 43, 0.12);
  --radius-arch: 10px;
  --radius-sm: 6px;
  --max-w: 1200px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background-color: var(--bg-travertine);
  color: var(--slate-ink);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  background-image: 
    linear-gradient(to right, rgba(200, 192, 179, 0.18) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(200, 192, 179, 0.18) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* Global Hyperlink Consistency - Prominent Cedar Wood Accent, Never Default Blue/Purple */
a, a:visited {
  color: var(--cedar-wood);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

a:hover, a:focus {
  color: var(--cedar-hover);
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Architectural Sunlit Beam Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 2px solid var(--border-stone);
  box-shadow: 0 4px 20px rgba(30, 36, 43, 0.04);
}

.site-header::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--cedar-wood) 0%, var(--cobalt-blue) 55%, var(--courtyard-emerald) 100%);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 20px;
  flex-wrap: wrap;
}

.brand-logo, .brand-logo:visited {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--slate-ink);
}

.brand-logo:hover {
  color: var(--cobalt-blue);
}

.brand-logo svg {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--slate-ink);
}

.brand-domain {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--cedar-wood);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 2px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.main-nav a, .main-nav a:visited {
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--slate-ink);
  text-decoration: none;
  border: 1px solid transparent;
}

.main-nav a:hover, .main-nav a.active {
  color: var(--cobalt-blue);
  background-color: var(--surface-warm);
  border-color: var(--border-stone);
}

.main-nav a.nav-hub-pill, .main-nav a.nav-hub-pill:visited {
  background-color: var(--cedar-soft);
  color: var(--cedar-wood);
  border: 1px solid rgba(194, 109, 58, 0.35);
  font-weight: 700;
}

.main-nav a.nav-hub-pill:hover {
  background-color: var(--cedar-wood);
  color: #FFFFFF;
}

/* Hero Section - Architectural Atrium Grid */
.hero-section {
  padding: 56px 0 64px;
  position: relative;
}

.hero-atrium-frame {
  background: var(--surface-white);
  border: 1px solid var(--border-structural);
  border-top: 5px solid var(--cedar-wood);
  border-radius: var(--radius-arch);
  box-shadow: var(--shadow-atrium);
  padding: 44px 40px;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 40px;
  align-items: center;
}

.atrium-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.spec-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 0.82rem;
  font-weight: 700;
  border-radius: 4px;
  background-color: var(--surface-warm);
  color: var(--slate-ink);
  border-left: 3px solid var(--cobalt-blue);
  border-top: 1px solid var(--border-stone);
  border-right: 1px solid var(--border-stone);
  border-bottom: 1px solid var(--border-stone);
}

.spec-badge.emerald {
  border-left-color: var(--courtyard-emerald);
  background-color: var(--emerald-soft);
  color: #065F46;
}

.hero-content h1 {
  font-size: 2.45rem;
  line-height: 1.24;
  font-weight: 800;
  color: var(--slate-ink);
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.hero-content h1 span {
  color: var(--cobalt-blue);
  border-bottom: 4px solid rgba(194, 109, 58, 0.35);
}

.hero-subtitle {
  font-size: 1.08rem;
  color: var(--slate-muted);
  margin-bottom: 26px;
  line-height: 1.75;
}

.hero-metrics-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  padding: 16px;
  background-color: var(--bg-travertine);
  border: 1px solid var(--border-stone);
  border-radius: var(--radius-sm);
  margin-bottom: 28px;
}

.metric-cell {
  border-left: 2px solid var(--cedar-wood);
  padding-left: 12px;
}

.metric-val {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--slate-ink);
  display: block;
}

.metric-lbl {
  font-size: 0.8rem;
  color: var(--slate-muted);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.btn-primary, .btn-primary:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 30px;
  background-color: var(--cobalt-blue);
  color: #FFFFFF;
  font-size: 1.02rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 2px solid var(--cobalt-blue);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.btn-primary:hover {
  background-color: var(--cobalt-dark);
  border-color: var(--cobalt-dark);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-secondary, .btn-secondary:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 26px;
  background-color: var(--surface-warm);
  color: var(--cedar-wood);
  font-size: 1.02rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 2px solid var(--cedar-wood);
  transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.btn-secondary:hover {
  background-color: var(--cedar-wood);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.hero-visual-box {
  background: var(--surface-warm);
  border: 1px solid var(--border-stone);
  border-radius: var(--radius-arch);
  padding: 14px;
  box-shadow: inset 0 2px 6px rgba(30, 36, 43, 0.04);
}

.hero-anim-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

/* Section Structural Styling */
.section-block {
  padding: 64px 0;
}

.section-block.alt-bg {
  background-color: var(--bg-travertine-deep);
  border-top: 1px solid var(--border-stone);
  border-bottom: 1px solid var(--border-stone);
}

.section-header {
  max-width: 760px;
  margin: 0 auto 44px;
  text-align: center;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cedar-wood);
  background: var(--cedar-soft);
  padding: 4px 12px;
  border-radius: 4px;
  border: 1px solid rgba(194, 109, 58, 0.28);
  margin-bottom: 10px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--slate-ink);
  margin-bottom: 12px;
}

.section-header p {
  color: var(--slate-muted);
  font-size: 1.02rem;
}

/* Cantilevered Roof-Line Card Grid */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.arch-card {
  background: var(--surface-white);
  border: 1px solid var(--border-stone);
  border-top: 4px solid var(--cobalt-blue);
  border-radius: var(--radius-arch);
  padding: 28px 24px;
  box-shadow: var(--shadow-atrium);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.arch-card:nth-child(even) {
  border-top-color: var(--cedar-wood);
}

.arch-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-cantilever);
}

.card-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--surface-warm);
  border: 1px solid var(--border-stone);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.card-icon-wrap svg {
  width: 28px;
  height: 28px;
}

.arch-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--slate-ink);
  margin-bottom: 10px;
}

.arch-card p {
  font-size: 0.95rem;
  color: var(--slate-muted);
  margin-bottom: 16px;
}

.card-spec-footer {
  padding-top: 12px;
  border-top: 1px dashed var(--border-stone);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--cedar-wood);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Home-Gateway Pricing Comparison Matrix */
.pricing-card {
  background: var(--surface-white);
  border: 1px solid var(--border-structural);
  border-top: 5px solid var(--slate-ink);
  border-radius: var(--radius-arch);
  padding: 34px 28px;
  box-shadow: var(--shadow-atrium);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  border-top-color: var(--cobalt-blue);
  border-width: 2px;
  border-top-width: 6px;
  transform: scale(1.02);
  box-shadow: var(--shadow-cantilever);
}

.tier-ribbon {
  position: absolute;
  top: 14px;
  right: 16px;
  background: var(--cedar-wood);
  color: #FFFFFF;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
}

.tier-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--slate-ink);
  margin-bottom: 6px;
}

.tier-scene {
  font-size: 0.88rem;
  color: var(--slate-muted);
  margin-bottom: 20px;
}

.tier-price-box {
  background: var(--bg-travertine);
  border: 1px solid var(--border-stone);
  padding: 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 22px;
}

.price-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--cobalt-blue);
}

.price-unit {
  font-size: 0.92rem;
  color: var(--slate-muted);
  font-weight: 600;
}

.tier-specs {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.tier-specs li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--bg-travertine-deep);
  font-size: 0.94rem;
  color: var(--slate-ink);
}

.tier-specs li svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
}

.pricing-btn, .pricing-btn:visited {
  width: 100%;
  text-align: center;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  text-decoration: none;
  background: var(--cobalt-blue);
  color: #FFFFFF;
  display: inline-block;
}

.pricing-btn:hover {
  background: var(--cobalt-dark);
  color: #FFFFFF;
}

/* Architectural Matrix Table */
.matrix-table-wrap {
  margin-top: 40px;
  background: var(--surface-white);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-arch);
  overflow-x: auto;
  box-shadow: var(--shadow-atrium);
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.matrix-table th, .matrix-table td {
  padding: 15px 20px;
  border-bottom: 1px solid var(--border-stone);
  font-size: 0.94rem;
}

.matrix-table th {
  background: var(--surface-warm);
  font-weight: 800;
  color: var(--slate-ink);
}

/* FAQ Section */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.faq-item {
  background: var(--surface-white);
  border: 1px solid var(--border-stone);
  border-left: 4px solid var(--cedar-wood);
  border-radius: var(--radius-arch);
  padding: 24px;
  box-shadow: var(--shadow-atrium);
}

.faq-item h3 {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--slate-ink);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-item p {
  font-size: 0.94rem;
  color: var(--slate-muted);
}

/* Testimonials */
.review-card {
  background: var(--surface-white);
  border: 1px solid var(--border-stone);
  border-radius: var(--radius-arch);
  padding: 26px;
  box-shadow: var(--shadow-atrium);
}

.review-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--bg-travertine-deep);
}

.reviewer-name {
  font-weight: 800;
  color: var(--slate-ink);
  font-size: 1rem;
}

.reviewer-tag {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--courtyard-emerald);
  background: var(--emerald-soft);
  padding: 3px 9px;
  border-radius: 4px;
}

/* Hub Page & Article Layout */
.page-banner {
  background: var(--surface-white);
  border-bottom: 1px solid var(--border-stone);
  padding: 48px 0;
}

.page-banner h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--slate-ink);
  margin-bottom: 12px;
}

.page-banner p {
  color: var(--slate-muted);
  max-width: 760px;
  font-size: 1.05rem;
}

.wiki-card {
  background: var(--surface-white);
  border: 1px solid var(--border-structural);
  border-top: 4px solid var(--cedar-wood);
  border-radius: var(--radius-arch);
  padding: 28px;
  box-shadow: var(--shadow-atrium);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.wiki-tag-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--slate-muted);
  margin-bottom: 12px;
}

.wiki-cat {
  background: var(--cedar-soft);
  color: var(--cedar-wood);
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
}

.wiki-card h2, .wiki-card h3 {
  font-size: 1.25rem;
  line-height: 1.4;
  margin-bottom: 12px;
}

.wiki-card h2 a, .wiki-card h2 a:visited,
.wiki-card h3 a, .wiki-card h3 a:visited {
  color: var(--slate-ink);
  text-decoration: none;
}

.wiki-card h2 a:hover, .wiki-card h3 a:hover {
  color: var(--cedar-wood);
  text-decoration: underline;
}

.wiki-excerpt {
  font-size: 0.94rem;
  color: var(--slate-muted);
  margin-bottom: 20px;
}

.wiki-readmore, .wiki-readmore:visited {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--cedar-wood);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Article Content Page */
.article-shell {
  max-width: 880px;
  margin: 44px auto 64px;
  background: var(--surface-white);
  border: 1px solid var(--border-structural);
  border-top: 5px solid var(--cobalt-blue);
  border-radius: var(--radius-arch);
  padding: 48px 44px;
  box-shadow: var(--shadow-atrium);
}

.article-breadcrumb {
  font-size: 0.88rem;
  color: var(--slate-muted);
  margin-bottom: 18px;
}

.article-shell h1 {
  font-size: 2rem;
  line-height: 1.32;
  font-weight: 800;
  color: var(--slate-ink);
  margin-bottom: 16px;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding: 12px 16px;
  background: var(--surface-warm);
  border: 1px solid var(--border-stone);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--slate-muted);
  margin-bottom: 32px;
}

.article-body h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--slate-ink);
  margin: 34px 0 14px;
  padding-left: 12px;
  border-left: 4px solid var(--cedar-wood);
}

.article-body h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--slate-ink);
  margin: 24px 0 10px;
}

.article-body p {
  font-size: 1.02rem;
  color: #2B333C;
  margin-bottom: 18px;
  line-height: 1.85;
}

.article-body ul, .article-body ol {
  margin: 0 0 20px 22px;
  color: #2B333C;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.75;
}

.article-callout {
  background: var(--cedar-soft);
  border: 1px solid rgba(194, 109, 58, 0.35);
  border-left: 4px solid var(--cedar-wood);
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  margin: 28px 0;
}

.article-cta-banner {
  margin-top: 40px;
  padding: 28px;
  background: var(--bg-travertine);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-arch);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

/* Footer - Strictly Only the 4 Required Links */
.site-footer {
  background: var(--surface-white);
  border-top: 2px solid var(--border-stone);
  padding: 36px 0;
  margin-top: 40px;
}

.footer-links-only {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-links-only a, .footer-links-only a:visited {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--slate-ink);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-links-only a:hover {
  color: var(--cedar-wood);
  background: var(--surface-warm);
}

/* Responsive Layout & Rule 7 Mobile Navigation (NEVER display:none) */
@media (max-width: 1024px) {
  .hero-atrium-frame {
    grid-template-columns: 1fr;
    padding: 32px 24px;
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0;
    gap: 12px;
  }
  .main-nav {
    display: flex;
    width: 100%;
    gap: 8px;
    flex-wrap: wrap;
  }
  .main-nav a, .main-nav a:visited {
    flex: 1 1 auto;
    justify-content: center;
    padding: 9px 12px;
    font-size: 0.88rem;
    background: var(--surface-warm);
    border: 1px solid var(--border-stone);
  }
  .hero-content h1 {
    font-size: 1.85rem;
  }
  .hero-metrics-bar {
    grid-template-columns: 1fr;
  }
  .grid-4, .grid-2, .faq-grid {
    grid-template-columns: 1fr;
  }
  .article-shell {
    padding: 28px 20px;
    margin: 24px auto 44px;
  }
}