/* ==========================================================================
   贝雪云 官方视觉系统样式表
   Visual System: White #FFFFFF, Aubergine #493447, Lavender-Gray #EEE9EF, Warm Charcoal #29252A
   Desktop H1: 57px, Mobile H1: 36px, Body: 17px
   ========================================================================== */

:root {
  /* Core Color Palette */
  --color-white: #FFFFFF;
  --color-aubergine: #493447;
  --color-aubergine-dark: #352433;
  --color-aubergine-light: #60465E;
  --color-aubergine-surface: #412e3f;
  --color-lavender-gray: #EEE9EF;
  --color-lavender-subtle: #F9F7FA;
  --color-lavender-border: #DCD3DE;
  --color-charcoal: #29252A;
  --color-charcoal-muted: #5E5862;
  --color-charcoal-subtle: #857E8A;
  
  /* Status & Accents (Restrained, No Neon) */
  --color-accent-gold: #C89B65;
  --color-accent-teal: #4F807B;
  --color-node-hk: #A0648D;
  --color-node-jp: #667B99;
  --color-node-sg: #5E8C78;
  --color-node-us: #9E7D59;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", Roboto, sans-serif;
  --font-serif: Georgia, "Songti SC", "Source Han Serif SC", SimSun, serif;
  --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --font-size-h1-desktop: 57px;
  --font-size-h1-mobile: 36px;
  --font-size-body: 17px;
  --line-height-body: 1.68;
  --line-height-heading: 1.2;

  /* Spacing Rhythm */
  --space-unit: 8px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Container */
  --container-max: 1240px;
  --container-pad: 24px;

  /* Shadows & Borders */
  --shadow-sm: 0 2px 4px rgba(41, 37, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(73, 52, 71, 0.08);
  --shadow-lg: 0 12px 32px rgba(73, 52, 71, 0.12);
  --shadow-overlap: 0 16px 40px rgba(53, 36, 51, 0.18);
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 14px;
  --border-radius-xl: 20px;

  /* Transitions */
  --transition-quick: 0.18s ease-out;
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-charcoal);
  background-color: var(--color-white);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--color-aubergine);
  color: var(--color-white);
  padding: 10px 18px;
  z-index: 9999;
  text-decoration: none;
  font-size: 14px;
  border-radius: var(--border-radius-sm);
  transition: top var(--transition-quick);
}
.skip-link:focus {
  top: 16px;
  outline: 2px solid var(--color-accent-gold);
}

/* Typography Hierarchy with Vertical Rhythm */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-charcoal);
  font-weight: 700;
  line-height: var(--line-height-heading);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--font-size-h1-mobile);
  font-family: var(--font-serif);
  font-weight: 700;
}
@media (min-width: 1024px) {
  h1 {
    font-size: var(--font-size-h1-desktop);
  }
}

h2 {
  font-size: 30px;
  font-family: var(--font-serif);
  margin-bottom: var(--space-md);
}
@media (min-width: 768px) {
  h2 {
    font-size: 38px;
  }
}

h3 {
  font-size: 22px;
  margin-bottom: var(--space-sm);
}
@media (min-width: 768px) {
  h3 {
    font-size: 24px;
  }
}

h4 {
  font-size: 18px;
  margin-bottom: var(--space-xs);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-charcoal-muted);
}
p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-aubergine);
  text-decoration: none;
  transition: color var(--transition-quick);
}
a:hover {
  color: var(--color-aubergine-light);
}
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-aubergine);
  outline-offset: 3px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.section {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  position: relative;
}
@media (min-width: 1024px) {
  .section {
    padding-top: var(--space-4xl);
    padding-bottom: var(--space-4xl);
  }
}

.section-alt {
  background-color: var(--color-lavender-subtle);
  border-top: 1px solid var(--color-lavender-border);
  border-bottom: 1px solid var(--color-lavender-border);
}

/* Section Narrow Side Label Header */
.section-header {
  margin-bottom: var(--space-2xl);
  position: relative;
}

.section-label-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.section-side-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-aubergine);
  background-color: var(--color-lavender-gray);
  padding: 4px 10px;
  border-radius: var(--border-radius-sm);
  border-left: 3px solid var(--color-aubergine);
}

.section-title {
  color: var(--color-charcoal);
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-size: 17px;
  color: var(--color-charcoal-muted);
  max-width: 720px;
  line-height: 1.6;
}

/* Buttons System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--border-radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-quick);
  text-decoration: none;
  line-height: 1.3;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-aubergine);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background-color: var(--color-aubergine-dark);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-aubergine);
  border: 1px solid var(--color-lavender-border);
}
.btn-secondary:hover {
  background-color: var(--color-lavender-subtle);
  border-color: var(--color-aubergine);
  color: var(--color-aubergine-dark);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
  border-radius: var(--border-radius-sm);
}

.btn-outline-aubergine {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.35);
}
.btn-outline-aubergine:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-lavender-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background-color var(--transition-quick);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 700;
  color: var(--color-aubergine);
  text-decoration: none;
}
.brand-logo:hover {
  color: var(--color-aubergine-light);
}

.brand-logo-icon {
  width: 32px;
  height: 32px;
  background-color: var(--color-aubergine);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
}

.nav-menu {
  display: none;
  list-style: none;
  gap: var(--space-lg);
  align-items: center;
}
@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
  }
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-charcoal);
  padding: 6px 4px;
  position: relative;
}
.nav-link:hover {
  color: var(--color-aubergine);
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-aubergine);
  transition: width var(--transition-quick);
}
.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: none;
  align-items: center;
  gap: var(--space-sm);
}
@media (min-width: 1024px) {
  .nav-actions {
    display: flex;
  }
}

.hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--color-lavender-border);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  padding: 0;
}
@media (min-width: 1024px) {
  .hamburger-btn {
    display: none;
  }
}

.hamburger-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-charcoal);
  transition: transform var(--transition-quick), opacity var(--transition-quick);
}

.hamburger-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.hamburger-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-white);
  padding: var(--space-xl) var(--space-lg);
  display: none;
  flex-direction: column;
  gap: var(--space-lg);
  overflow-y: auto;
  z-index: 999;
  border-top: 1px solid var(--color-lavender-border);
}
.mobile-nav-drawer.is-open {
  display: flex;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mobile-nav-list .nav-link {
  font-size: 18px;
  font-weight: 600;
  padding: 8px 0;
  display: block;
  border-bottom: 1px solid var(--color-lavender-subtle);
}

.mobile-drawer-cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

/* ==========================================================================
   Hero Section: White Canvas with Left-Aligned Text + Large Aubergine Dashboard
   ========================================================================== */
.hero-section {
  background-color: var(--color-white);
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-3xl);
  position: relative;
}
@media (min-width: 1024px) {
  .hero-section {
    padding-top: var(--space-3xl);
    padding-bottom: var(--space-4xl);
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  align-items: center;
}
@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.15fr 1fr;
    gap: var(--space-3xl);
  }
}

.hero-content {
  text-align: left;
}

.hero-side-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-aubergine);
  background-color: var(--color-lavender-gray);
  padding: 4px 12px;
  border-radius: var(--border-radius-sm);
  border-left: 3px solid var(--color-aubergine);
  margin-bottom: var(--space-md);
}

.hero-title {
  color: var(--color-charcoal);
  margin-bottom: var(--space-md);
  line-height: 1.15;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--color-charcoal-muted);
  line-height: 1.65;
  margin-bottom: var(--space-xl);
  max-width: 600px;
}

.hero-trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-lavender-border);
}

.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--color-charcoal-muted);
}
.trust-item svg {
  color: var(--color-aubergine);
}

/* Large Aubergine Dashboard Panel */
.dashboard-panel {
  background-color: var(--color-aubergine);
  color: var(--color-white);
  border-radius: var(--border-radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-overlap);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
@media (min-width: 768px) {
  .dashboard-panel {
    padding: var(--space-2xl);
  }
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  padding-bottom: var(--space-md);
  margin-bottom: var(--space-lg);
}

.dashboard-brand-status {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #6FCF97;
  position: relative;
}
.status-pulse-dot::after {
  content: "";
  position: absolute;
  top: -3px;
  left: -3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: rgba(111, 207, 151, 0.4);
  animation: pulse-ring 2.2s infinite;
}

.dashboard-title-text {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-lavender-gray);
}

.dashboard-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  background-color: rgba(255, 255, 255, 0.12);
  color: var(--color-lavender-gray);
  padding: 3px 8px;
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Dashboard Topology Nodes Grid (HK, JP, SG, US) */
.dashboard-nodes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
@media (max-width: 480px) {
  .dashboard-nodes-grid {
    grid-template-columns: 1fr;
  }
}

.node-card {
  background-color: var(--color-aubergine-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  transition: transform var(--transition-quick), border-color var(--transition-quick);
}
.node-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.3);
}

.node-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
}

.node-region-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-white);
  display: flex;
  align-items: center;
  gap: 6px;
}

.node-code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-accent-gold);
  background: rgba(200, 155, 101, 0.15);
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
}

.node-desc {
  font-size: 12px;
  color: var(--color-lavender-gray);
  line-height: 1.4;
  margin-bottom: var(--space-xs);
}

.node-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.node-tag {
  font-size: 10px;
  font-family: var(--font-mono);
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-lavender-gray);
  padding: 2px 6px;
  border-radius: 3px;
}

/* Dashboard Metrics & Protocol Footer */
.dashboard-specs {
  background: rgba(0, 0, 0, 0.15);
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.dashboard-specs-title {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--color-accent-gold);
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.dashboard-protocol-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--color-white);
}

.protocol-chip {
  background: rgba(255, 255, 255, 0.1);
  padding: 4px 10px;
  border-radius: var(--border-radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
}

.dashboard-statement {
  font-size: 11px;
  color: rgba(238, 233, 239, 0.65);
  margin-top: var(--space-sm);
  line-height: 1.4;
}

/* ==========================================================================
   Bento Blocks: Selective Overlapping Layout (Benefits Section)
   ========================================================================== */
.bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}
@media (min-width: 768px) {
  .bento-grid {
    grid-template-columns: repeat(12, 1fr);
    align-items: stretch;
  }
}

.bento-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-lavender-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  display: flex;
  flex-direction: column;
}
.bento-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* Selective Overlapping Bento Structure */
@media (min-width: 768px) {
  .bento-primary {
    grid-column: span 7;
    background-color: var(--color-white);
  }
  .bento-secondary {
    grid-column: span 5;
    background-color: var(--color-lavender-subtle);
  }
  .bento-tertiary {
    grid-column: span 12;
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-lavender-subtle) 100%);
  }
}

.bento-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-md);
  background-color: var(--color-lavender-gray);
  color: var(--color-aubergine);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}
.bento-icon-wrapper svg {
  width: 26px;
  height: 26px;
}

.bento-title {
  font-size: 22px;
  margin-bottom: var(--space-sm);
  color: var(--color-charcoal);
}

.bento-desc {
  font-size: 15px;
  color: var(--color-charcoal-muted);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.bento-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-lavender-border);
}

.bento-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--color-charcoal);
}
.bento-feature-item svg {
  color: var(--color-aubergine);
  flex-shrink: 0;
  margin-top: 3px;
}

/* ==========================================================================
   AI & Streaming Scenarios Section (Covering All 11 Required Services)
   ========================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}
@media (min-width: 640px) {
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .scenarios-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.scenario-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-lavender-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-quick), box-shadow var(--transition-quick);
}
.scenario-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-aubergine-light);
}

.scenario-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--space-sm);
}

.scenario-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-sm);
  background-color: var(--color-lavender-gray);
  color: var(--color-aubergine);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.scenario-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-charcoal);
}

.scenario-category {
  font-size: 12px;
  color: var(--color-aubergine);
  font-weight: 600;
  font-family: var(--font-mono);
}

.scenario-body {
  font-size: 14px;
  color: var(--color-charcoal-muted);
  line-height: 1.6;
}

.scenario-badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: var(--space-sm);
  padding-top: var(--space-xs);
}

.scenario-tag {
  font-size: 11px;
  font-family: var(--font-mono);
  background-color: var(--color-lavender-subtle);
  color: var(--color-charcoal);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--color-lavender-border);
}

/* ==========================================================================
   Comparison-Strip Pricing Layout
   ========================================================================== */
.pricing-section {
  position: relative;
}

.pricing-strip-wrapper {
  background-color: var(--color-white);
  border: 1px solid var(--color-lavender-border);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin-bottom: var(--space-lg);
}

.pricing-table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.pricing-comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}

.pricing-comparison-table th,
.pricing-comparison-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-lavender-border);
  font-size: 15px;
}

.pricing-comparison-table th {
  background-color: var(--color-lavender-subtle);
  color: var(--color-charcoal);
  font-weight: 700;
  font-size: 16px;
}

.pricing-comparison-table th.col-highlight,
.pricing-comparison-table td.col-highlight {
  background-color: rgba(73, 52, 71, 0.04);
}

.pricing-tier-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pricing-tier-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-charcoal);
}

.pricing-tier-price {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-aubergine);
  font-family: var(--font-serif);
}

.pricing-tier-period {
  font-size: 13px;
  color: var(--color-charcoal-muted);
}

.pricing-tier-tag {
  align-self: flex-start;
  font-size: 11px;
  background-color: var(--color-aubergine);
  color: var(--color-white);
  padding: 2px 8px;
  border-radius: var(--border-radius-sm);
  margin-top: 4px;
}

.pricing-disclaimer {
  background-color: var(--color-lavender-subtle);
  border: 1px solid var(--color-lavender-border);
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  font-size: 13px;
  color: var(--color-charcoal-muted);
  line-height: 1.6;
}
.pricing-disclaimer strong {
  color: var(--color-charcoal);
}

/* ==========================================================================
   Article Cards (Publication Cover Style with Large Numbers)
   Desktop: 3 columns, Tablet: 2 columns, Mobile: 1 column
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}
@media (min-width: 640px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.article-pub-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-lavender-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  text-decoration: none;
}
.article-pub-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-aubergine);
}

.pub-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-lavender-gray);
  padding-bottom: var(--space-sm);
}

/* Large Publication Article Number */
.pub-number {
  font-family: var(--font-serif);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-aubergine);
  opacity: 0.85;
}

.pub-category {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-charcoal-muted);
  background-color: var(--color-lavender-subtle);
  padding: 3px 8px;
  border-radius: var(--border-radius-sm);
  letter-spacing: 0.05em;
}

.pub-title {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-charcoal);
  margin-bottom: var(--space-sm);
  transition: color var(--transition-quick);
}
.article-pub-card:hover .pub-title {
  color: var(--color-aubergine);
}

.pub-excerpt {
  font-size: 14px;
  color: var(--color-charcoal-muted);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.pub-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--color-charcoal-subtle);
  font-family: var(--font-mono);
  padding-top: var(--space-sm);
  border-top: 1px dashed var(--color-lavender-border);
}

.pub-read-cta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-aubergine);
  font-weight: 600;
  font-size: 13px;
}

/* ==========================================================================
   Testimonials (Sample User Experiences)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}
@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .testimonials-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.testimonial-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-lavender-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.testimonial-quote {
  font-size: 14px;
  color: var(--color-charcoal-muted);
  line-height: 1.65;
  margin-bottom: var(--space-md);
  flex-grow: 1;
  position: relative;
}

.testimonial-author-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--color-lavender-subtle);
  padding-top: var(--space-sm);
}

.testimonial-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-lavender-gray);
  color: var(--color-aubergine);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}

.testimonial-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-charcoal);
}

.testimonial-role {
  font-size: 12px;
  color: var(--color-charcoal-subtle);
}

.testimonial-meta-note {
  font-size: 12px;
  color: var(--color-charcoal-subtle);
  text-align: center;
  margin-top: var(--space-lg);
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-lavender-border);
  border-radius: var(--border-radius-md);
  background-color: var(--color-white);
  overflow: hidden;
  transition: border-color var(--transition-quick);
}
.faq-item:hover {
  border-color: var(--color-aubergine-light);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: var(--space-lg);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-charcoal);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
}

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition-normal);
  color: var(--color-aubergine);
}

.faq-item.is-open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
  background-color: var(--color-lavender-subtle);
  padding: 0 var(--space-lg);
}

.faq-item.is-open .faq-answer {
  max-height: 500px;
  padding: var(--space-md) var(--space-lg) var(--space-lg);
  border-top: 1px solid var(--color-lavender-border);
}

.faq-answer p {
  font-size: 15px;
  color: var(--color-charcoal-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Footer: 4 Columns + Mandatory PBN Matrix Links (No nofollow)
   ========================================================================== */
.site-footer {
  background-color: var(--color-aubergine-dark);
  color: var(--color-lavender-gray);
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}
@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
  }
}

.footer-col-brand h3 {
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: 22px;
  margin-bottom: var(--space-sm);
}

.footer-col-brand p {
  color: rgba(238, 233, 239, 0.75);
  font-size: 14px;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col-title {
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-list a {
  color: rgba(238, 233, 239, 0.75);
  font-size: 14px;
  transition: color var(--transition-quick);
}
.footer-nav-list a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

/* Explicit PBN Related Links Styling */
.footer-pbn-links a {
  color: #E2C29D; /* Subtle warm gold accent for visibility */
  font-weight: 500;
}
.footer-pbn-links a:hover {
  color: #FFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  font-size: 13px;
  color: rgba(238, 233, 239, 0.6);
  text-align: center;
}
@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ==========================================================================
   Article Detail & Subpages Styling
   ========================================================================== */
.article-header {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-lavender-border);
  background-color: var(--color-lavender-subtle);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-charcoal-subtle);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--color-aubergine);
}
.breadcrumb-separator {
  color: var(--color-charcoal-subtle);
}

.article-title {
  font-size: 32px;
  font-family: var(--font-serif);
  color: var(--color-charcoal);
  margin-bottom: var(--space-md);
  line-height: 1.25;
}
@media (min-width: 768px) {
  .article-title {
    font-size: 42px;
  }
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: 13px;
  color: var(--color-charcoal-muted);
  font-family: var(--font-mono);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-3xl);
}
@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr 320px;
  }
}

.article-content {
  font-size: 17px;
  line-height: 1.75;
  color: var(--color-charcoal);
}

.article-content h2 {
  font-size: 26px;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-lavender-gray);
  color: var(--color-aubergine);
}

.article-content h3 {
  font-size: 20px;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-charcoal);
}

.article-content ul, 
.article-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

.article-content li {
  margin-bottom: 6px;
}

.article-content blockquote {
  border-left: 4px solid var(--color-aubergine);
  background-color: var(--color-lavender-subtle);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
  font-style: normal;
  color: var(--color-charcoal);
}

.article-callout {
  background-color: var(--color-lavender-subtle);
  border: 1px solid var(--color-lavender-border);
  border-left: 4px solid var(--color-aubergine);
  border-radius: var(--border-radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
}
.article-callout-title {
  font-weight: 700;
  font-size: 16px;
  color: var(--color-aubergine);
  margin-bottom: 6px;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: 15px;
}
.article-table th,
.article-table td {
  padding: 10px 14px;
  border: 1px solid var(--color-lavender-border);
}
.article-table th {
  background-color: var(--color-lavender-gray);
  font-weight: 700;
  color: var(--color-charcoal);
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.sidebar-widget {
  background-color: var(--color-white);
  border: 1px solid var(--color-lavender-border);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.sidebar-widget-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-lavender-gray);
  color: var(--color-aubergine);
}

.sidebar-related-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-related-item a {
  font-size: 14px;
  line-height: 1.45;
  color: var(--color-charcoal);
  display: block;
}
.sidebar-related-item a:hover {
  color: var(--color-aubergine);
}

.sidebar-cta-box {
  background-color: var(--color-aubergine);
  color: var(--color-white);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
  text-align: center;
}
.sidebar-cta-box h4 {
  color: var(--color-white);
  font-size: 18px;
  margin-bottom: 8px;
}
.sidebar-cta-box p {
  color: var(--color-lavender-gray);
  font-size: 13px;
  margin-bottom: var(--space-md);
}

/* ==========================================================================
   Reduced Motion Preferences
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .status-pulse-dot::after {
    display: none;
  }
}

/* Subtle Line Pulse Keyframe */
@keyframes pulse-ring {
  0% {
    transform: scale(0.9);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.6);
    opacity: 0.2;
  }
  100% {
    transform: scale(2.2);
    opacity: 0;
  }
}