/* ==========================================================================
   BoostNet Editorial Style Sheet
   Palette:
   - Warm Rice-White: #f5f1ea
   - Ink Black: #1a1a1a
   - Vermilion Accent: #c8392b
   - Hairline Border: #1a1a1a (1px solid)
   - Subtle Muted: #6b665f
   Strict Design Rules: NO gradients, NO box-shadows, NO border-radius.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;0,9..144,700;1,9..144,400;1,9..144,600;1,9..144,700&family=Inter:wght@400;500;600;700&family=Noto+Serif+SC:wght@400;600;700&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
  --bg-primary: #f5f1ea;
  --bg-card: #fdfbf7;
  --text-main: #1a1a1a;
  --text-muted: #666057;
  --vermilion: #c8392b;
  --vermilion-hover: #a32c20;
  --border-line: #1a1a1a;
  --border-hairline: rgba(26, 26, 26, 0.22);
  --font-serif: 'Fraunces', 'Noto Serif SC', 'Songti SC', Georgia, serif;
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --container-max: 1200px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important;
  box-shadow: none !important;
}

html {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  color: var(--text-main);
  overflow-x: hidden;
}

/* --- Typography --- */
h1, h2, h3, h4, .serif-font {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.4rem, 5.2vw, 4.4rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  margin-bottom: 0.75rem;
}

h3 {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-main);
}

p.lead {
  font-size: 1.15rem;
  line-height: 1.75;
  color: #38342f;
}

em, .italic-accent {
  font-style: italic;
  font-family: var(--font-serif);
  font-weight: 400;
  color: var(--vermilion);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--vermilion);
}

/* --- Hairline Layout Elements --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hairline-divider {
  width: 100%;
  height: 1px;
  background-color: var(--border-line);
  margin: 0;
  border: none;
}

.hairline-subtle {
  width: 100%;
  height: 1px;
  background-color: var(--border-hairline);
  margin: 0;
  border: none;
}

/* --- Section Journal Numbering & Headers --- */
.section-marker {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--vermilion);
  display: inline-block;
  margin-bottom: 0.5rem;
}

.section-head {
  padding: 3.5rem 0 2rem;
  border-bottom: 1px solid var(--border-line);
  margin-bottom: 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.section-title-wrap {
  max-width: 720px;
}

.section-caption {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 380px;
  text-align: right;
  line-height: 1.5;
}

/* --- Top Bar & Header Navigation --- */
.edition-masthead {
  border-bottom: 1px solid var(--border-line);
  background-color: var(--bg-primary);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 0;
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
}

.site-nav {
  position: sticky;
  top: 0;
  background-color: var(--bg-primary);
  border-bottom: 2px solid var(--border-line);
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-badge {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: var(--vermilion);
  color: #ffffff;
  padding: 2px 6px;
  vertical-align: middle;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 2rem;
}

.nav-links li a {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.5rem 0;
  position: relative;
}

.nav-links li a.highlight-link {
  color: var(--vermilion);
  font-weight: 700;
  border-bottom: 2px solid var(--vermilion);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* --- Magazine Editorial Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 0.85rem 1.75rem;
  border: 1px solid var(--border-line);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
  min-height: 48px;
}

.btn-primary {
  background-color: var(--vermilion);
  color: #ffffff;
  border-color: var(--vermilion);
}

.btn-primary:hover {
  background-color: var(--vermilion-hover);
  border-color: var(--vermilion-hover);
  color: #ffffff;
}

.btn-outline {
  background-color: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-line);
}

.btn-outline:hover {
  background-color: var(--text-main);
  color: #ffffff;
}

.btn-pbn {
  background-color: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-line);
}

.btn-pbn:hover {
  background-color: #ede7dc;
  color: var(--vermilion);
  border-color: var(--vermilion);
}

/* --- Hero Section (12-Col Asymmetrical Layout) --- */
.hero-section {
  padding: 4.5rem 0 4rem;
  border-bottom: 1px solid var(--border-line);
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.hero-main-col {
  grid-column: span 8;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding-right: 1.5rem;
}

.hero-meta-col {
  grid-column: span 4;
  border-left: 1px solid var(--border-line);
  padding-left: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-title {
  margin-bottom: 1.75rem;
  text-align: left;
}

.hero-intro {
  font-size: 1.15rem;
  line-height: 1.8;
  color: #2b2824;
  margin-bottom: 2.25rem;
  max-width: 680px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.hero-specs-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border-line);
  padding-top: 1.5rem;
  gap: 1rem;
}

.spec-item .num {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--vermilion);
  display: block;
}

.spec-item .label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Hero Side Dispatch Card */
.dispatch-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

.dispatch-header {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--vermilion);
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.dispatch-quote {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.5;
  font-style: italic;
  margin-bottom: 1rem;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: #1a6d38;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: #1a6d38;
  display: inline-block;
}

/* --- Section 01: Core Advantages (3 Cards) --- */
.cards-triad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--border-line);
  margin-bottom: 4rem;
}

.triad-card {
  padding: 2.5rem 2rem;
  background-color: var(--bg-card);
  border-right: 1px solid var(--border-line);
  display: flex;
  flex-direction: column;
}

.triad-card:last-child {
  border-right: none;
}

.triad-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--vermilion);
  line-height: 1;
  margin-bottom: 1rem;
}

.triad-icon-box {
  width: 52px;
  height: 52px;
  margin-bottom: 1.25rem;
}

.triad-card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.triad-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 0;
}

/* --- Section 02: Streaming & AI Support Cards --- */
.stream-ai-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2rem;
  margin-bottom: 4rem;
}

.feature-panel {
  border: 1px solid var(--border-line);
  background-color: var(--bg-card);
  padding: 2.5rem;
}

.feature-panel.panel-left {
  grid-column: span 7;
}

.feature-panel.panel-right {
  grid-column: span 5;
}

.badge-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.badge-tag {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-line);
  color: var(--text-main);
}

.badge-tag.accent {
  background-color: var(--vermilion);
  color: #ffffff;
  border-color: var(--vermilion);
}

/* --- Section 03: Pricing Comparison Table --- */
.pricing-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-line);
}

.pricing-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-line);
  background-color: var(--bg-card);
  margin-bottom: 2rem;
}

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

table.pricing-table th,
table.pricing-table td {
  padding: 1.5rem 1.25rem;
  border-bottom: 1px solid var(--border-hairline);
  border-right: 1px solid var(--border-hairline);
  font-size: 0.95rem;
}

table.pricing-table th:last-child,
table.pricing-table td:last-child {
  border-right: none;
}

table.pricing-table thead th {
  background-color: #ece6dc;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  border-bottom: 2px solid var(--border-line);
}

table.pricing-table thead th.recommended-th {
  background-color: var(--vermilion);
  color: #ffffff;
}

.price-val {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1;
}

.price-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

/* --- Section 04: User Testimonials / Reviews --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.review-card {
  border: 1px solid var(--border-line);
  background-color: var(--bg-card);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-score {
  color: var(--vermilion);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.review-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #2b2824;
  margin-bottom: 1.5rem;
}

.reviewer-meta {
  border-top: 1px solid var(--border-hairline);
  padding-top: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.reviewer-name {
  font-weight: 700;
  font-size: 0.9rem;
}

.reviewer-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- Section 05: FAQ Section --- */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-bottom: 4rem;
}

.faq-item {
  border: 1px solid var(--border-line);
  background-color: var(--bg-card);
  padding: 2rem;
}

.faq-question {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.faq-answer {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* --- Section 06: Editorial Articles Preview Hub --- */
.articles-preview-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2rem;
  margin-bottom: 4rem;
}

.article-card-main {
  grid-column: span 7;
  border: 1px solid var(--border-line);
  background-color: var(--bg-card);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-card-sidebar {
  grid-column: span 5;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.article-mini-item {
  border: 1px solid var(--border-line);
  background-color: var(--bg-card);
  padding: 1.5rem;
}

/* --- Footer --- */
.site-footer {
  background-color: #eae3d5;
  border-top: 2px solid var(--border-line);
  padding: 3.5rem 0 2.5rem;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-line);
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav li a {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-nav li a:hover {
  color: var(--vermilion);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Standalone Article & Subpage Layout --- */
.editorial-article-wrap {
  max-width: 860px;
  margin: 3rem auto 5rem;
  padding: 0 1.5rem;
}

.breadcrumb-nav {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.article-header {
  border-bottom: 1px solid var(--border-line);
  padding-bottom: 2rem;
  margin-bottom: 2.5rem;
}

.article-date-author {
  display: flex;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.article-body {
  font-size: 1.1rem;
  line-height: 1.85;
  color: #22201d;
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body h2 {
  font-size: 1.85rem;
  margin-top: 3rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-hairline);
}

.article-body h3 {
  font-size: 1.4rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.article-body ul, .article-body ol {
  margin-left: 1.5rem;
  margin-bottom: 1.75rem;
}

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

.article-body blockquote {
  border-left: 3px solid var(--vermilion);
  padding-left: 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  font-family: var(--font-serif);
  color: #3b3630;
}

.article-body .link-natural {
  color: var(--vermilion);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body .link-natural:hover {
  color: #000000;
}

/* --- Mobile Responsiveness --- */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-main-col {
    grid-column: span 12;
    padding-right: 0;
  }
  .hero-meta-col {
    grid-column: span 12;
    border-left: none;
    border-top: 1px solid var(--border-line);
    padding-left: 0;
    padding-top: 2rem;
    margin-top: 1rem;
  }
  .cards-triad {
    grid-template-columns: 1fr;
  }
  .triad-card {
    border-right: none;
    border-bottom: 1px solid var(--border-line);
  }
  .triad-card:last-child {
    border-bottom: none;
  }
  .stream-ai-grid {
    grid-template-columns: 1fr;
  }
  .feature-panel.panel-left,
  .feature-panel.panel-right {
    grid-column: span 12;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .faq-grid {
    grid-template-columns: 1fr;
  }
  .articles-preview-grid {
    grid-template-columns: 1fr;
  }
  .article-card-main,
  .article-card-sidebar {
    grid-column: span 12;
  }
}

@media (max-width: 768px) {
  .edition-masthead {
    display: none;
  }
  .nav-inner {
    height: auto;
    padding: 1rem 0;
    flex-wrap: wrap;
    gap: 1rem;
  }
  .nav-links {
    width: 100%;
    order: 3;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    gap: 1.25rem;
    white-space: nowrap;
  }
  .hero-specs-strip {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }
  .footer-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .btn {
    width: 100%;
  }
}