/* ==========================================================================
   mitce Network Accelerator / Proxy Service Design System
   Coastal Architecture meets Modern Digital Product
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-primary: #FBFAF7;       /* Warm White 主背景 */
  --bg-card: #FFFFFF;          /* White 卡片 */
  --text-heading: #25343B;     /* Deep Navy Gray 标题 */
  --text-body: #647279;        /* Blue Gray 正文 */
  --text-muted: #8E9EA7;       /* Muted Text 辅助文字 */
  
  --brand-primary: #547B88;    /* Low-saturation Sea Blue 品牌主色 */
  --brand-hover: #3F606C;      /* Darker Sea Blue 品牌悬停色 */
  --brand-light: #EAF0EF;      /* Subdued Light Area 浅海蓝区域 */
  --brand-light-hover: #DCE6E4;
  
  --accent-gold: #BD9B6F;      /* Sand Gold 沙金点缀 */
  --accent-gold-light: #F7F3EC;
  --accent-gold-hover: #A7855B;

  --status-green: #489D80;     /* Coastal Teal / Active status */
  --status-green-bg: #E8F5F1;
  --status-blue: #547B88;

  --border-color: rgba(37, 52, 59, 0.08);
  --border-color-strong: rgba(37, 52, 59, 0.16);

  /* Elevation / Shadows */
  --shadow-sm: 0 2px 8px rgba(37, 52, 59, 0.04);
  --shadow-md: 0 10px 30px -10px rgba(37, 52, 59, 0.06);
  --shadow-lg: 0 20px 40px -15px rgba(84, 123, 136, 0.12);

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Layout */
  --max-width: 1240px;
  --header-height: 80px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

a {
  color: var(--brand-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(251, 250, 247, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: -0.02em;
}

.brand-logo svg {
  width: 34px;
  height: 34px;
}

.brand-logo .logo-accent {
  color: var(--brand-primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-weight: 500;
  color: var(--text-heading);
  font-size: 0.95rem;
  padding: 6px 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--brand-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--brand-primary);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--brand-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(84, 123, 136, 0.25);
}

.btn-primary:hover {
  background-color: var(--brand-hover);
  color: #FFFFFF;
  box-shadow: 0 6px 20px rgba(84, 123, 136, 0.35);
  transform: translateY(-1px);
}

.btn-gold {
  background-color: var(--accent-gold);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(189, 155, 111, 0.3);
}

.btn-gold:hover {
  background-color: var(--accent-gold-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-color-strong);
  color: var(--text-heading);
}

.btn-outline:hover {
  background-color: var(--brand-light);
  border-color: var(--brand-primary);
  color: var(--brand-primary);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

/* Mobile Menu Toggle Button */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-heading);
}

/* Hero Section */
.hero-section {
  padding: 70px 0 90px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background-color: var(--brand-light);
  border-radius: var(--radius-full);
  color: var(--brand-primary);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-tag-dot {
  width: 8px;
  height: 8px;
  background-color: var(--status-green);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(72, 157, 128, 0.2);
}

.hero-title {
  font-size: 3.25rem;
  line-height: 1.18;
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-title .highlight-text {
  color: var(--brand-primary);
  position: relative;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.2;
}

.metric-label {
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Sea Chart Global Node Network Graphic */
.sea-chart-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
  position: relative;
  background-image: 
    radial-gradient(circle at 50% 50%, rgba(84, 123, 136, 0.04) 0%, transparent 70%),
    linear-gradient(rgba(37, 52, 59, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 52, 59, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 30px 30px, 30px 30px;
}

.sea-chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border-color-strong);
}

.chart-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.chart-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 8px;
  background-color: var(--brand-light);
  color: var(--brand-primary);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.chart-coords {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.sea-chart-svg-wrap {
  width: 100%;
  height: 340px;
  position: relative;
}

.node-popover {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  background-color: rgba(37, 52, 59, 0.95);
  color: #FFFFFF;
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-fast);
}

.node-popover-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.node-flag {
  font-size: 1.25rem;
}

.node-popover-title {
  font-weight: 700;
  color: #FFFFFF;
}

.node-popover-sub {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--font-mono);
}

.node-popover-metrics {
  display: flex;
  align-items: center;
  gap: 16px;
}

.node-metric-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(255, 255, 255, 0.12);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.status-dot-active {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #489D80;
}

/* Section Common */
.section {
  padding: 90px 0;
  position: relative;
}

.section-light {
  background-color: var(--brand-light);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 60px;
}

.section-subtitle {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand-primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-body);
}

/* Core Advantages Section (No boxes overkill - whitespace & clean lines) */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.advantage-item {
  padding: 32px;
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
  position: relative;
}

.advantage-item:hover {
  transform: translateY(-4px);
  border-color: rgba(84, 123, 136, 0.3);
  box-shadow: var(--shadow-md);
}

.advantage-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--brand-light);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.advantage-icon-box svg {
  width: 26px;
  height: 26px;
}

.advantage-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 12px;
}

.advantage-desc {
  color: var(--text-body);
  font-size: 0.975rem;
  line-height: 1.65;
}

/* Global Node Dashboard Section */
.nodes-dashboard {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.nodes-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(251, 250, 247, 0.5);
  flex-wrap: wrap;
  gap: 16px;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-body);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background-color: var(--brand-primary);
  color: #FFFFFF;
  border-color: var(--brand-primary);
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background-color: var(--border-color);
}

.node-card {
  background-color: var(--bg-card);
  padding: 22px;
  transition: background-color var(--transition-fast);
}

.node-card:hover {
  background-color: var(--brand-light);
}

.node-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.node-location {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--text-heading);
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--status-green);
  background-color: var(--status-green-bg);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.node-details {
  font-size: 0.825rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.node-detail-row {
  display: flex;
  justify-content: space-between;
}

/* AI & Streaming Scenarios Section */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.scenario-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.scenario-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(84, 123, 136, 0.25);
}

.scenario-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.scenario-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--brand-light);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.scenario-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-heading);
}

.scenario-body {
  margin-bottom: 28px;
  color: var(--text-body);
  font-size: 0.975rem;
  line-height: 1.7;
}

.logo-list {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.logo-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-heading);
}

.logo-tag svg {
  width: 16px;
  height: 16px;
}

/* Pricing Packages Section */
.pricing-toggle-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.pricing-toggle-btn {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-body);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pricing-toggle-btn.active {
  background-color: var(--brand-primary);
  color: #FFFFFF;
  border-color: var(--brand-primary);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-fast);
}

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

.pricing-card.featured {
  border: 2px solid var(--accent-gold);
  box-shadow: var(--shadow-lg);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  right: 28px;
  background-color: var(--accent-gold);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pricing-plan-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.pricing-plan-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 40px;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
}

.pricing-currency {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-heading);
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1;
}

.pricing-period {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.925rem;
  color: var(--text-body);
}

.pricing-feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--brand-primary);
  flex-shrink: 0;
}

/* Articles Entrance Section (Guide style) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: rgba(84, 123, 136, 0.3);
  box-shadow: var(--shadow-md);
}

.article-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand-primary);
  background-color: var(--brand-light);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  align-self: flex-start;
}

.article-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.read-more-link {
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--brand-primary);
}

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: var(--accent-gold);
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}

.review-content {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-body);
  margin-bottom: 24px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--brand-light);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.author-info-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-heading);
}

.author-info-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Accordion Section */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--brand-primary);
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-heading);
  cursor: pointer;
}

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

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-fast);
  padding: 0 24px;
  color: var(--text-body);
  font-size: 0.975rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 24px 22px;
}

/* Article Page Layout Styles */
.article-container {
  max-width: 900px;
  margin: 40px auto 80px;
  padding: 0 24px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-body);
}

.breadcrumbs a:hover {
  color: var(--brand-primary);
}

.article-header {
  margin-bottom: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--border-color);
}

.article-main-title {
  font-size: 2.5rem;
  line-height: 1.25;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.article-header-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-body);
}

.article-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-heading);
  margin: 44px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-heading);
  margin: 32px 0 16px;
}

.article-content p {
  margin-bottom: 22px;
}

.article-content ul, .article-content ol {
  margin-bottom: 24px;
  padding-left: 28px;
}

.article-content li {
  margin-bottom: 10px;
}

.article-content blockquote {
  background-color: var(--brand-light);
  border-left: 4px solid var(--brand-primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 30px 0;
  font-style: italic;
  color: var(--text-heading);
}

.article-cta-box {
  background-color: var(--bg-card);
  border: 2px solid var(--brand-primary);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin: 48px 0;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.article-cta-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 12px;
}

.article-cta-desc {
  font-size: 1rem;
  color: var(--text-body);
  margin-bottom: 24px;
}

.related-articles {
  margin-top: 70px;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
}

.related-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 24px;
}

/* Footer */
.site-footer {
  background-color: var(--text-heading);
  color: #D5DEE2;
  padding: 80px 0 40px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  line-height: 1.65;
  color: #9AA8AF;
  margin-bottom: 24px;
  max-width: 360px;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 20px;
}

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

.footer-links a {
  color: #9AA8AF;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: #798991;
  flex-wrap: wrap;
  gap: 16px;
}

.external-partner-links {
  display: flex;
  gap: 20px;
  align-items: center;
  font-size: 0.85rem;
}

.external-partner-links a {
  color: #9AA8AF;
}

.external-partner-links a:hover {
  color: var(--accent-gold);
}

/* Reduced Motion Support */
@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;
  }
}

/* Responsive Styles */

/* Desktop & Laptop Breakpoint (1024px to 1440px) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-title {
    font-size: 2.75rem;
  }

  .advantages-grid, .pricing-grid, .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Tablet Breakpoint (768px) */
@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--bg-card);
    flex-direction: column;
    padding: 30px 24px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    z-index: 999;
  }

  .nav-menu.open {
    transform: translateY(0);
  }

  .mobile-toggle {
    display: block;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .scenarios-grid {
    grid-template-columns: 1fr;
  }

  .advantages-grid, .pricing-grid, .articles-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Mobile Breakpoints (375px, 390px, 430px) */
@media (max-width: 480px) {
  .hero-section {
    padding: 40px 0 60px;
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .nodes-grid {
    grid-template-columns: 1fr;
  }

  .sea-chart-svg-wrap {
    height: 280px;
  }

  .node-popover {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .article-main-title {
    font-size: 1.85rem;
  }

  .btn-lg {
    width: 100%;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
}