/* ==========================================
   好鸭云机场 - 精致红酒画廊风 CSS
   Color Palette:
   - Primary BG: #FCF9F7 (Warm White)
   - Accent Burgundy: #6A2838 (Deep Burgundy)
   - Muted Rose-Gray: #DCC8CA
   - Dark Brown Text: #342C2E
   - Secondary Tint: #F7EFEF
   ========================================== */

:root {
  --bg-primary: #FCF9F7;
  --bg-secondary: #F7EFEF;
  --bg-card: #FFFFFF;
  --color-burgundy: #6A2838;
  --color-burgundy-hover: #521E2A;
  --color-rose-gray: #DCC8CA;
  --color-rose-light: #F0E4E5;
  --color-dark-brown: #342C2E;
  --color-text-muted: #625558;
  --color-border: #DCC8CA;
  --color-border-light: #EBE0E2;
  
  --font-serif: "Noto Serif SC", "Playfair Display", "Songti SC", "STSong", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  
  --max-width: 1200px;
  --transition-fast: 0.25s ease;
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-subtle: 0 10px 30px rgba(106, 40, 56, 0.05);
  --shadow-hover: 0 16px 40px rgba(106, 40, 56, 0.1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--color-dark-brown);
}

body {
  font-family: var(--font-sans);
  font-size: 1.0625rem; /* 17px desktop default */
  line-height: 1.75;
  color: var(--color-dark-brown);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--color-dark-brown);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h1 {
  font-size: 3.75rem; /* 60px desktop */
  color: var(--color-burgundy);
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.25rem; /* 36px desktop */
  margin-bottom: 1.25rem;
  position: relative;
}

h3 {
  font-size: 1.5rem; /* 24px desktop */
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1.25rem;
  color: var(--color-text-muted);
}

p.lead {
  font-size: 1.2rem;
  line-height: 1.8;
  color: var(--color-dark-brown);
}

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

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

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

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

.section-padding {
  padding: 5rem 0;
}

.gallery-border-top {
  border-top: 1px solid var(--color-border);
}

.gallery-border-bottom {
  border-bottom: 1px solid var(--color-border);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-burgundy);
  margin-bottom: 0.75rem;
  padding: 0.25rem 0.75rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-rose-gray);
  border-radius: 2px;
}

.section-title {
  font-size: 2.35rem;
  color: var(--color-dark-brown);
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-top: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 2px;
  transition: all var(--transition-normal);
  cursor: pointer;
  text-align: center;
  font-family: var(--font-sans);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--color-burgundy);
  color: #FFFFFF;
  border-color: var(--color-burgundy);
  box-shadow: 0 4px 15px rgba(106, 40, 56, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-burgundy-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(106, 40, 56, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-dark-brown);
  border-color: var(--color-burgundy);
}

.btn-outline:hover {
  background-color: var(--color-burgundy);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

/* Header Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(252, 249, 247, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-burgundy);
  letter-spacing: -0.02em;
}

.logo-mark {
  width: 38px;
  height: 38px;
  background-color: var(--color-burgundy);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.1rem;
  border: 2px solid var(--color-rose-gray);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-dark-brown);
  font-size: 1rem;
  font-weight: 500;
  position: relative;
  padding: 0.25rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-burgundy);
  transition: width var(--transition-fast);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

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

/* Hamburger menu toggle */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-dark-brown);
  transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero Section */
.hero {
  padding: 5rem 0 6rem 0;
  overflow: hidden;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-rose-gray);
  font-size: 0.9rem;
  color: var(--color-burgundy);
  margin-bottom: 1.5rem;
  border-radius: 20px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-burgundy);
}

.hero-text {
  font-size: 1.15rem;
  line-height: 1.8;
  margin-bottom: 2.25rem;
  color: var(--color-text-muted);
}

.hero-features-list {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.925rem;
  color: var(--color-dark-brown);
  font-weight: 500;
}

.hero-feature-item svg {
  color: var(--color-burgundy);
  flex-shrink: 0;
}

/* Hero Isometric Dashboard Frame */
.hero-dashboard-wrapper {
  position: relative;
}

.hero-dashboard-frame {
  background: var(--bg-card);
  border: 1px solid var(--color-rose-gray);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--shadow-subtle);
  position: relative;
  transition: transform var(--transition-normal);
}

.hero-dashboard-frame:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.dashboard-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border-light);
}

.dashboard-dots {
  display: flex;
  gap: 6px;
}

.dashboard-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-rose-gray);
}

.dashboard-title {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--color-burgundy);
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* Advantage Blocks (3 Exhibition Cards) */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.advantage-card {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  padding: 3rem 2rem 2.5rem 2rem;
  position: relative;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.advantage-card:hover {
  border-color: var(--color-burgundy);
  transform: translateY(-6px);
  box-shadow: var(--shadow-subtle);
}

.advantage-num {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  color: var(--color-rose-gray);
  line-height: 1;
  margin-bottom: 1.5rem;
  font-weight: 700;
  transition: color var(--transition-fast);
}

.advantage-card:hover .advantage-num {
  color: var(--color-burgundy);
}

.advantage-title {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  color: var(--color-dark-brown);
}

.advantage-desc {
  font-size: 0.975rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Worldwide Nodes Gallery */
.nodes-section {
  background-color: var(--bg-secondary);
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.node-card {
  background-color: var(--bg-card);
  border: 1px solid var(--color-rose-gray);
  padding: 2rem 1.5rem;
  border-radius: 4px;
  text-align: center;
  transition: all var(--transition-normal);
}

.node-card:hover {
  border-color: var(--color-burgundy);
  box-shadow: var(--shadow-subtle);
}

.node-flag {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}

.node-name {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-dark-brown);
  margin-bottom: 0.5rem;
}

.node-tag {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--color-burgundy);
  background-color: var(--bg-secondary);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  border: 1px solid var(--color-rose-light);
}

.node-disclaimer {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 2.5rem;
}

/* AI & Streaming Use Cases */
.usecases-tabs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.usecase-box {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  padding: 2.5rem;
  border-radius: 4px;
}

.usecase-box-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border-light);
}

.usecase-icon-badge {
  width: 44px;
  height: 44px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-rose-gray);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-burgundy);
}

.usecase-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.usecase-tag {
  font-size: 0.85rem;
  padding: 0.3rem 0.75rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  color: var(--color-dark-brown);
  font-weight: 500;
}

.usecase-text {
  font-size: 0.975rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* Pricing Section (Exhibition Panels) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  padding: 3rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card.featured {
  border: 2px solid var(--color-burgundy);
  box-shadow: var(--shadow-subtle);
}

.pricing-featured-badge {
  position: absolute;
  top: -12px;
  right: 2rem;
  background-color: var(--color-burgundy);
  color: #FFFFFF;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  padding: 0.25rem 0.75rem;
  border-radius: 2px;
  text-transform: uppercase;
}

.pricing-title {
  font-size: 1.4rem;
  color: var(--color-dark-brown);
  margin-bottom: 0.5rem;
}

.pricing-amount {
  font-family: var(--font-serif);
  color: var(--color-burgundy);
  margin: 1.25rem 0 0.5rem 0;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.pricing-amount .currency {
  font-size: 1.5rem;
  font-weight: 600;
}

.pricing-amount .price {
  font-size: 3.25rem;
  font-weight: 700;
  line-height: 1;
}

.pricing-amount .period {
  font-size: 1rem;
  color: var(--color-text-muted);
  font-family: var(--font-sans);
  margin-left: 0.25rem;
}

.pricing-traffic-tag {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-burgundy);
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-rose-gray);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  margin-bottom: 1.25rem;
  font-weight: 500;
}

.pricing-placeholder-text {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--color-burgundy);
  margin: 1.25rem 0;
  font-weight: 600;
}

.pricing-features {
  list-style: none;
  margin: 1.75rem 0 2.5rem 0;
}

.pricing-features li {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--color-border-light);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.pricing-features li svg {
  color: var(--color-burgundy);
  flex-shrink: 0;
}

.pricing-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 2rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 2px;
}

/* Articles Cards Grid (3 Desktop / 2 Tablet / 1 Mobile) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

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

.article-card:hover {
  border-color: var(--color-burgundy);
  transform: translateY(-4px);
  box-shadow: var(--shadow-subtle);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.825rem;
  color: var(--color-burgundy);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.article-card-title {
  font-size: 1.2rem;
  line-height: 1.4;
  margin-bottom: 1rem;
}

.article-card-title a {
  color: var(--color-dark-brown);
}

.article-card-title a:hover {
  color: var(--color-burgundy);
}

.article-card-excerpt {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-card-link {
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-burgundy);
}

.article-card-link svg {
  transition: transform var(--transition-fast);
}

.article-card:hover .article-card-link svg {
  transform: translateX(4px);
}

/* Testimonials (Editorial Panels) */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.testimonial-card {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  padding: 2.25rem 2rem;
  position: relative;
}

.testimonial-quote-mark {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--color-rose-gray);
  line-height: 1;
  margin-bottom: -0.5rem;
}

.testimonial-content {
  font-size: 0.975rem;
  font-style: italic;
  color: var(--color-dark-brown);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.testimonial-author {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-burgundy);
}

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

/* FAQ Accordion */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  margin-bottom: 1rem;
  border-radius: 2px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-burgundy);
}

.faq-question {
  width: 100%;
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-dark-brown);
  cursor: pointer;
  gap: 1rem;
}

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

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.35s ease-out;
  padding: 0 2rem;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 2rem 1.5rem 2rem;
}

.faq-answer p {
  margin-bottom: 0.75rem;
  font-size: 0.975rem;
  line-height: 1.7;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* Article Page Layout */
.article-header {
  padding: 4rem 0 3rem 0;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--color-text-muted);
}

.breadcrumb a:hover {
  color: var(--color-burgundy);
}

.breadcrumb-separator {
  color: var(--color-rose-gray);
}

.breadcrumb-current {
  color: var(--color-burgundy);
  font-weight: 500;
}

.article-title-main {
  font-size: 2.75rem;
  line-height: 1.25;
  color: var(--color-burgundy);
  margin-bottom: 1.25rem;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding-top: 1rem;
  border-top: 1px solid var(--color-rose-gray);
}

.article-container {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3.5rem;
  padding: 4rem 0;
}

.article-content {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-dark-brown);
}

.article-content h2 {
  font-size: 1.8rem;
  color: var(--color-burgundy);
  margin: 2.5rem 0 1.25rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border-light);
}

.article-content h3 {
  font-size: 1.35rem;
  color: var(--color-dark-brown);
  margin: 2rem 0 1rem 0;
}

.article-content p {
  margin-bottom: 1.5rem;
  color: var(--color-dark-brown);
}

.article-content ul, .article-content ol {
  margin: 1rem 0 1.75rem 1.5rem;
  color: var(--color-dark-brown);
}

.article-content li {
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}

.article-content blockquote {
  border-left: 3px solid var(--color-burgundy);
  background-color: var(--bg-secondary);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--color-dark-brown);
}

.article-content code {
  font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9rem;
  background-color: var(--bg-secondary);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  border: 1px solid var(--color-rose-gray);
}

.article-content pre {
  background-color: #2D2527;
  color: #F7EFEF;
  padding: 1.5rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 1.75rem 0;
}

.article-content pre code {
  background: none;
  border: none;
  color: inherit;
  padding: 0;
}

/* Article Sidebar */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-widget {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  border-radius: 2px;
}

.sidebar-widget-title {
  font-size: 1.15rem;
  color: var(--color-burgundy);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar-links {
  list-style: none;
}

.sidebar-links li {
  margin-bottom: 0.85rem;
}

.sidebar-links a {
  font-size: 0.95rem;
  color: var(--color-dark-brown);
  line-height: 1.4;
  display: block;
}

.sidebar-links a:hover {
  color: var(--color-burgundy);
}

.sidebar-cta-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-rose-gray);
  padding: 1.75rem;
  text-align: center;
}

.sidebar-cta-box h4 {
  font-size: 1.2rem;
  color: var(--color-burgundy);
  margin-bottom: 0.75rem;
}

.sidebar-cta-box p {
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

/* Footer */
.footer {
  background-color: var(--color-dark-brown);
  color: #E6DCDE;
  padding: 4.5rem 0 2rem 0;
  font-size: 0.925rem;
}

.footer h3, .footer h4 {
  color: #FFFFFF;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: #C8BCBF;
  margin-top: 1rem;
  font-size: 0.925rem;
  line-height: 1.65;
}

.footer-title {
  font-size: 1.1rem;
  color: #FFFFFF;
  margin-bottom: 1.25rem;
  font-family: var(--font-serif);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.65rem;
}

.footer-links a {
  color: #C8BCBF;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-rose-gray);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(220, 200, 202, 0.2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: #A89C9F;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Media Queries / Responsive Breakpoints (375px, 390px, 430px, 768px, 1024px, 1440px) */
@media (max-width: 1024px) {
  h1 { font-size: 3rem; }
  .advantages-grid { grid-template-columns: repeat(3, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); } /* 2 columns on tablet */
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
  .nodes-grid { grid-template-columns: repeat(2, 1fr); }
  .article-container { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  body { font-size: 1rem; } /* 16px mobile body */
  h1 { font-size: 2.3125rem; } /* 37px mobile H1 */
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.3rem; }
  
  .hamburger { display: flex; }
  
  .nav-menu {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--color-border);
    padding: 2rem 1.5rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 1.25rem;
  }
  
  .hero { padding: 3rem 0; }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  
  .advantages-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; } /* 1 column on mobile */
  .testimonials-grid { grid-template-columns: 1fr; }
  .usecases-tabs-grid { grid-template-columns: 1fr; }
  .nodes-grid { grid-template-columns: 1fr; }
  
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 430px) {
  .container { padding: 0 1.25rem; }
  h1 { font-size: 2.1rem; }
  .btn { width: 100%; }
  .btn-group { flex-direction: column; width: 100%; }
}