:root {
  --color-bg: #faf6ef;
  --color-ink: #1c1a17;
  --color-vermilion: #d4402a;
  --color-ochre: #b8863b;
  --color-warm-gray: #8a8578;
  --color-hairline: #e3dccb;
  
  --font-display: 'DM Serif Display', 'Noto Serif SC', serif;
  --font-body: 'Sora', 'Noto Serif SC', sans-serif;
  --font-cjk: 'Noto Serif SC', serif;
}

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

body {
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--color-ink);
}

a {
  color: var(--color-ink);
  text-decoration: none;
  transition: all 0.25s ease;
}

/* Editorial layout rules */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 6rem 0;
  border-bottom: 2px solid var(--color-ink);
}

.section-last {
  border-bottom: none;
}

.kicker {
  font-family: var(--font-body);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ochre);
  display: block;
  margin-bottom: 1rem;
}

.numeral {
  font-family: var(--font-display);
  color: var(--color-ochre);
  font-size: 2rem;
  line-height: 1;
}

/* Header */
header {
  border-bottom: 2px solid var(--color-ink);
  padding: 1.5rem 0;
}

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

.logo {
  display: flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-ink);
  position: relative;
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  margin-right: 10px;
  position: relative;
}

.logo-cloud {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 30px; height: 20px;
  border: 1.5px solid var(--color-ink);
  border-radius: 10px;
  z-index: 2;
}

.logo-brush {
  position: absolute;
  top: 55%; left: 45%;
  transform: translate(-50%, -50%);
  width: 34px; height: 12px;
  background-color: var(--color-vermilion);
  border-radius: 4px;
  z-index: 1;
}

.logo-seal {
  position: absolute;
  bottom: 0; right: 0;
  width: 8px; height: 8px;
  background-color: var(--color-vermilion);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav a {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.95rem;
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: -2px;
  left: 0;
  background-color: var(--color-vermilion);
  transition: width 0.25s ease;
}

nav a:hover::after {
  width: 100%;
}

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 1rem 2.5rem;
  border: 1px solid var(--color-ink);
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  transition: all 0.25s ease;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-bg);
}

.btn-secondary:hover {
  background-color: var(--color-ink);
  color: var(--color-bg);
}

/* Hero Section */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero h1 {
  font-size: 4.5rem;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero p.intro {
  font-size: 1.25rem;
  color: var(--color-warm-gray);
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
}

/* Images */
.image-wrapper {
  position: relative;
  padding: 8px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-hairline);
}

.image-wrapper img {
  width: 100%;
  display: block;
  filter: sepia(0.2) contrast(0.9);
}

/* Features Grid */
.features-grid, .ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  border-top: 1px solid var(--color-hairline);
  padding-top: 1.5rem;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin: 1rem 0;
}

.feature-card p {
  color: var(--color-warm-gray);
  font-size: 0.95rem;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.pricing-card {
  border: 1px solid var(--color-ink);
  padding: 3rem 2rem;
  text-align: center;
}

.pricing-card h3 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.price {
  font-family: var(--font-display);
  font-size: 3.5rem;
  color: var(--color-ochre);
  margin-bottom: 1.5rem;
}

.price span {
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--color-warm-gray);
}

.pricing-features {
  list-style: none;
  margin-bottom: 2.5rem;
  text-align: left;
}

.pricing-features li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-hairline);
  color: var(--color-warm-gray);
  font-size: 0.9rem;
}

.pricing-card .btn {
  width: 100%;
}

/* FAQ */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: 800px;
  margin: 3rem auto 0;
}

.faq-item {
  border-top: 1px solid var(--color-hairline);
  padding-top: 1rem;
}

.faq-item h4 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.faq-item p {
  color: var(--color-warm-gray);
}

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

.testimonial blockquote {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.4;
  margin-bottom: 1.5rem;
}

.testimonial cite {
  font-style: normal;
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--color-ochre);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
}

/* Footer */
footer {
  border-top: 2px solid var(--color-ink);
  padding: 4rem 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.footer-nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.footer-nav a {
  color: var(--color-warm-gray);
  font-size: 0.9rem;
}

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

/* Responsive */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero h1 {
    font-size: 3rem;
  }
  .features-grid, .ai-grid, .pricing-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-nav ul {
    flex-direction: column;
    gap: 1rem;
  }
  header .header-inner {
    flex-direction: column;
    gap: 1rem;
  }
  nav ul {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  .btn {
    padding: 1.25rem; /* Larger touch target */
  }
}