/* --------------------------------------------------------------------------
   仙路湾机场 (Xianluwan Airport) - 水墨风视觉系统 CSS
   Aesthetic: Light Traditional Chinese Ink Wash & Modern UI Design
   -------------------------------------------------------------------------- */

@import url('https://fonts.googleapis.com/css2?family=Ma+Shan+Zheng&family=Noto+Serif+SC:wght@400;600;700;900&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  /* Color Palette - Traditional Ink & Paper */
  --bg-paper: #FAF7F2;
  --bg-paper-translucent: rgba(250, 247, 242, 0.92);
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: rgba(255, 255, 255, 0.98);

  --text-ink-primary: #1C2321;
  --text-ink-secondary: #4A5568;
  --text-ink-light: #718096;

  --accent-cinnabar: #C0392B;     /* 朱砂红 */
  --accent-cinnabar-hover: #A93226;
  --accent-ink-blue: #2980B9;    /* 靛蓝 */
  --accent-gold: #D4AF37;        /* 泥金 */
  --accent-bamboo: #27AE60;      /* 翠竹 */

  --border-ink: rgba(28, 35, 33, 0.12);
  --border-ink-strong: rgba(28, 35, 33, 0.25);
  --border-cinnabar: rgba(192, 57, 43, 0.3);

  --shadow-ink-sm: 0 4px 12px rgba(28, 35, 33, 0.04);
  --shadow-ink-md: 0 8px 24px rgba(28, 35, 33, 0.08);
  --shadow-ink-lg: 0 16px 40px rgba(28, 35, 33, 0.12);
  --shadow-cinnabar: 0 8px 25px rgba(192, 57, 43, 0.25);

  --font-heading: 'Noto Serif SC', 'Ma Shan Zheng', 'STSong', serif;
  --font-calligraphy: 'Ma Shan Zheng', cursive, serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-paper);
  background-image: url('../images/bg.png');
  background-repeat: repeat-y;
  background-position: top center;
  background-size: 100% auto;
  color: var(--text-ink-primary);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* Canvas Background for Ink Particles */
#ink-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
}

.site-wrapper {
  position: relative;
  z-index: 2;
}

/* Utility Containers */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* Typography & Ink Styling */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-ink-primary);
}

.section-title-wrap {
  text-align: center;
  margin-bottom: 3.5rem;
  position: relative;
}

.section-tag {
  display: inline-block;
  padding: 0.3rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent-cinnabar);
  background: rgba(192, 57, 43, 0.08);
  border: 1px solid var(--border-cinnabar);
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.25rem;
  letter-spacing: -0.5px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-cinnabar), transparent);
  margin: 0.75rem auto 0;
  border-radius: 2px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-ink-secondary);
  max-width: 680px;
  margin: 0.75rem auto 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  cursor: pointer;
  border: none;
  outline: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #1c2536 0%, #29384d 100%);
  color: #FAF7F2;
  box-shadow: var(--shadow-ink-md);
  border: 1px solid rgba(255, 255, 255, 0.15);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: 0.6s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(28, 35, 33, 0.25);
  color: #fff;
}

.btn-cinnabar {
  background: linear-gradient(135deg, var(--accent-cinnabar) 0%, #a93226 100%);
  color: #fff;
  box-shadow: var(--shadow-cinnabar);
}

.btn-cinnabar:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #a93226 0%, #88251b 100%);
  box-shadow: 0 12px 28px rgba(192, 57, 43, 0.35);
  color: #fff;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.6);
  border: 1.5px solid var(--border-ink-strong);
  color: var(--text-ink-primary);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background: #fff;
  border-color: var(--text-ink-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-ink-sm);
}

.btn-lg {
  padding: 1.1rem 2.4rem;
  font-size: 1.1rem;
  border-radius: var(--radius-md);
}

/* Red Stamp Graphic Accent (印章效果) */
.ink-stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 2px solid var(--accent-cinnabar);
  color: var(--accent-cinnabar);
  font-family: var(--font-calligraphy);
  font-size: 1.1rem;
  border-radius: 6px;
  transform: rotate(-6deg);
  opacity: 0.9;
  user-select: none;
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--bg-paper-translucent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-ink);
  transition: var(--transition-normal);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--text-ink-primary);
}

.brand-logo .logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #1C2321, #2C3E50);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FAF7F2;
  font-family: var(--font-calligraphy);
  font-size: 1.4rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-ink-secondary);
  transition: var(--transition-fast);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-cinnabar);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-cinnabar);
  transition: var(--transition-fast);
}

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

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-ink-primary);
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 5;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1.2rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border-ink-strong);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-ink-primary);
  box-shadow: var(--shadow-ink-sm);
  margin-bottom: 1.5rem;
}

.hero-badge .badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-bamboo);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-bamboo);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 3.2rem;
  line-height: 1.18;
  margin-bottom: 1.25rem;
  letter-spacing: -1px;
}

.hero-title span {
  color: var(--accent-cinnabar);
  position: relative;
}

.hero-title span::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background: rgba(192, 57, 43, 0.15);
  z-index: -1;
  border-radius: 4px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-ink-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-metrics {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--border-ink-strong);
}

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

.metric-number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--text-ink-primary);
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-ink-light);
}

.hero-visual {
  position: relative;
}

.hero-image-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-ink-lg);
  border: 4px solid #fff;
  background: #fff;
}

.hero-image-wrap img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.hero-image-wrap:hover img {
  transform: scale(1.03);
}

.hero-float-card {
  position: absolute;
  bottom: -20px;
  left: -20px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 1.2rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-ink-lg);
  border: 1px solid var(--border-ink);
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 10;
  animation: floatAnim 4s ease-in-out infinite alternate;
}

@keyframes floatAnim {
  0% { transform: translateY(0); }
  100% { transform: translateY(-10px); }
}

.hero-float-card .icon-box {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(192, 57, 43, 0.1);
  color: var(--accent-cinnabar);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.hero-float-card .info-title {
  font-weight: 700;
  font-size: 0.95rem;
}

.hero-float-card .info-sub {
  font-size: 0.8rem;
  color: var(--text-ink-light);
}

/* Feature Grid Section */
.features {
  padding: 6rem 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-ink);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-ink-sm);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: transparent;
  transition: var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-ink-lg);
  border-color: var(--border-ink-strong);
}

.feature-card:hover::before {
  background: linear-gradient(90deg, var(--accent-cinnabar), var(--accent-gold));
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(28, 35, 33, 0.05);
  color: var(--text-ink-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  transition: var(--transition-fast);
}

.feature-card:hover .feature-icon {
  background: var(--text-ink-primary);
  color: #fff;
}

.feature-title {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-ink-secondary);
  line-height: 1.6;
}

/* Pricing Section */
.pricing {
  padding: 6rem 0;
  background: rgba(28, 35, 33, 0.02);
  border-top: 1px solid var(--border-ink);
  border-bottom: 1px solid var(--border-ink);
}

.pricing-switch {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
}

.pricing-switch-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-ink);
  padding: 0.6rem 1.4rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-fast);
}

.pricing-switch-btn.active {
  background: var(--text-ink-primary);
  color: #fff;
  border-color: var(--text-ink-primary);
  box-shadow: var(--shadow-ink-sm);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border-ink);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  position: relative;
  box-shadow: var(--shadow-ink-sm);
}

.price-card.popular {
  border-color: var(--accent-cinnabar);
  background: #fff;
  box-shadow: var(--shadow-ink-lg);
  transform: scale(1.03);
}

.price-badge {
  position: absolute;
  top: -14px;
  right: 20px;
  background: var(--accent-cinnabar);
  color: #fff;
  padding: 0.3rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
}

.price-header {
  margin-bottom: 1.5rem;
  text-align: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px dashed var(--border-ink);
}

.price-name {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--text-ink-primary);
  line-height: 1;
}

.price-amount span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-ink-light);
}

.price-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.price-features li {
  font-size: 0.92rem;
  color: var(--text-ink-secondary);
  padding: 0.6rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.price-features li i {
  color: var(--accent-bamboo);
  font-size: 1.1rem;
}

/* Audience Section */
.audience {
  padding: 6rem 0;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.audience-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 2rem;
  border: 1px solid var(--border-ink);
  box-shadow: var(--shadow-ink-sm);
  text-align: center;
  transition: var(--transition-fast);
}

.audience-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cinnabar);
  box-shadow: var(--shadow-ink-md);
}

.audience-card .icon-wrap {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.25rem;
  background: rgba(192, 57, 43, 0.08);
  color: var(--accent-cinnabar);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.audience-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

.audience-card p {
  font-size: 0.9rem;
  color: var(--text-ink-secondary);
}

/* Tutorials Hub Section */
.tutorials {
  padding: 6rem 0;
  background: var(--bg-paper-translucent);
}

.tutorial-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.tab-btn {
  padding: 0.75rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border-ink);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tab-btn.active {
  background: var(--accent-cinnabar);
  color: #fff;
  border-color: var(--accent-cinnabar);
  box-shadow: var(--shadow-cinnabar);
}

.tab-content {
  display: none;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 3rem;
  border: 1px solid var(--border-ink);
  box-shadow: var(--shadow-ink-md);
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
  margin-top: 1.5rem;
}

.step-item {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.step-num {
  width: 38px;
  height: 38px;
  background: var(--text-ink-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.step-info h4 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}

.step-info p {
  font-size: 0.95rem;
  color: var(--text-ink-secondary);
}

.code-block {
  background: #1e293b;
  color: #f8fafc;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 0.9rem;
  margin-top: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.code-block code {
  color: #38bdf8;
}

.copy-btn {
  background: rgba(255,255,255,0.1);
  border: none;
  color: #fff;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8rem;
}

.copy-btn:hover {
  background: rgba(255,255,255,0.25);
}

/* Comparison Table Section */
.comparison {
  padding: 6rem 0;
}

.table-responsive {
  overflow-x: auto;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-ink);
  box-shadow: var(--shadow-ink-md);
}

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

.compare-table th, .compare-table td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-ink);
}

.compare-table th {
  background: var(--bg-paper);
  font-family: var(--font-heading);
  font-size: 1.05rem;
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table .highlight-col {
  background: rgba(192, 57, 43, 0.03);
  font-weight: 600;
}

.check-icon {
  color: var(--accent-bamboo);
  font-size: 1.2rem;
}

.cross-icon {
  color: var(--accent-cinnabar);
  font-size: 1.2rem;
}

/* Testimonials Section */
.testimonials {
  padding: 6rem 0;
  background: rgba(28, 35, 33, 0.02);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.review-card {
  background: #fff;
  border: 1px solid var(--border-ink);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-ink-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-ink-secondary);
  margin-bottom: 1.5rem;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-cinnabar);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.user-details h4 {
  font-size: 0.95rem;
}

.user-details span {
  font-size: 0.8rem;
  color: var(--text-ink-light);
}

.rating-stars {
  color: var(--accent-gold);
  margin-bottom: 0.75rem;
}

/* FAQ Accordion Section */
.faq {
  padding: 6rem 0;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border-ink);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-fast);
  box-shadow: var(--shadow-ink-sm);
}

.faq-item.active {
  border-color: var(--accent-cinnabar);
  box-shadow: var(--shadow-ink-md);
}

.faq-question {
  width: 100%;
  padding: 1.4rem 1.8rem;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--text-ink-primary);
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
  color: var(--accent-cinnabar);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
  padding: 0 1.8rem;
  background: var(--bg-paper);
}

.faq-item.active .faq-answer {
  max-height: 1000px;
  padding: 0 1.8rem 1.5rem;
  transition: max-height 0.5s ease-in-out;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-ink-secondary);
  line-height: 1.7;
}

/* Articles Catalog Section */
.articles {
  padding: 6rem 0;
  background: var(--bg-paper-translucent);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.article-card {
  background: #fff;
  border: 1px solid var(--border-ink);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-ink-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-ink-lg);
  border-color: var(--accent-cinnabar);
}

.article-body {
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-category {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cinnabar);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}

.article-title {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-ink-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-ink);
  font-size: 0.85rem;
  color: var(--text-ink-light);
}

.read-more-btn {
  color: var(--accent-cinnabar);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  cursor: pointer;
  border: none;
  background: none;
}

/* Article Reader Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 1.5rem;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-container {
  background: var(--bg-paper);
  border-radius: var(--radius-lg);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-ink);
  position: relative;
  padding: 3rem;
}

.modal-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: rgba(28, 35, 33, 0.08);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  cursor: pointer;
  color: var(--text-ink-primary);
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: var(--accent-cinnabar);
  color: #fff;
}

.modal-content-area h1 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.modal-content-area h2 {
  font-size: 1.6rem;
  margin: 2rem 0 1rem;
  border-bottom: 1px solid var(--border-ink);
  padding-bottom: 0.5rem;
}

.modal-content-area h3 {
  font-size: 1.25rem;
  margin: 1.5rem 0 0.75rem;
}

.modal-content-area p {
  margin-bottom: 1.25rem;
  line-height: 1.8;
  color: var(--text-ink-secondary);
}

.modal-content-area ul, .modal-content-area ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.modal-content-area li {
  margin-bottom: 0.5rem;
}

/* Footer Section */
.footer {
  background: #161D1A;
  color: #A0AEC0;
  padding: 5rem 0 2rem;
  border-top: 2px solid var(--accent-cinnabar);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand .brand-logo {
  color: #fff;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

.footer-links a:hover {
  color: var(--accent-cinnabar);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-cta-group, .hero-metrics {
    justify-content: center;
  }
  .hero-title {
    font-size: 2.6rem;
  }
  .price-card.popular {
    transform: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 80px; left: 0; width: 100%;
    background: var(--bg-paper);
    flex-direction: column;
    padding: 2rem;
    box-shadow: var(--shadow-ink-lg);
    border-bottom: 1px solid var(--border-ink);
  }
  .nav-menu.active {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .modal-container {
    padding: 1.8rem;
  }
}