/* 
   鹿语云 (Luyu Cloud) - Refined East-Asian ink aesthetic 
   Palette:
   Rice paper: #F5F1E6
   Pine ink: #22302B
   Mist teal-grey: #5C7266
   Cinnabar: #C3452F
   Stone grey: #A9AC9E
*/

:root {
    --rice-paper: #F5F1E6;
    --pine-ink: #22302B;
    --mist-teal-grey: #5C7266;
    --cinnabar: #C3452F;
    --stone-grey: #A9AC9E;
    
    --font-heading: 'Noto Serif SC', serif;
    --font-body: 'Noto Sans SC', sans-serif;
    --font-accent: 'Cormorant Garamond', serif;
}

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

body {
    background-color: var(--rice-paper);
    color: var(--pine-ink);
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.6;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="400" height="400" opacity="0.02"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.8" numOctaves="3" stitchTiles="stitch"/></filter><rect width="100%" height="100%" filter="url(%23noise)"/></svg>'); /* Subtle texture */
}

h1, h2, h3 {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--pine-ink);
    margin-bottom: 24px;
}

h1 { font-size: 2.5rem; font-weight: 900; }
h2 { font-size: 2rem; text-align: center; margin-top: 48px; }
h3 { font-size: 1.25rem; }

/* Navigation */
header {
    border-bottom: 1px solid var(--stone-grey);
    padding: 16px 0;
    position: sticky;
    top: 0;
    background-color: rgba(245, 241, 230, 0.9);
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--pine-ink);
}

.seal {
    background-color: var(--cinnabar);
    color: var(--rice-paper);
    font-size: 0.8rem;
    padding: 2px 4px;
    margin-left: 8px;
    border-radius: 2px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 24px;
}

nav a {
    text-decoration: none;
    color: var(--pine-ink);
    font-weight: 400;
    transition: color 0.3s ease;
}

nav a:hover {
    color: var(--cinnabar);
}

/* Sections */
section {
    max-width: 1200px;
    margin: 64px auto;
    padding: 0 24px;
}

/* Hero */
.hero {
    text-align: center;
    margin-top: 80px;
    margin-bottom: 80px;
}

.hero .subtitle {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--mist-teal-grey);
    margin-bottom: 32px;
}

.hero .intro {
    max-width: 600px;
    margin: 0 auto 48px auto;
    color: var(--mist-teal-grey);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-family: var(--font-heading);
    text-decoration: none;
    border-radius: 2px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    margin: 8px;
}

.btn-primary {
    background-color: var(--cinnabar);
    color: var(--rice-paper);
    border: 1px solid var(--cinnabar);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--cinnabar);
}

.btn-secondary {
    background-color: transparent;
    color: var(--pine-ink);
    border: 1px solid var(--pine-ink);
}

.btn-secondary:hover {
    background-color: var(--pine-ink);
    color: var(--rice-paper);
}

/* Cards (Features, Testimonials, FAQ) */
.cards-container, .testimonials-container, .faq-list {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    justify-content: center;
}

.card, .testimonial-card, .faq-item {
    flex: 1 1 300px;
    border: 1px solid var(--stone-grey);
    padding: 32px;
    border-radius: 2px;
    background-color: var(--rice-paper);
}

.media-ai-card {
    border: 1px solid var(--stone-grey);
    padding: 48px;
    text-align: center;
    border-radius: 2px;
    color: var(--mist-teal-grey);
    max-width: 800px;
    margin: 0 auto;
}

/* Pricing */
.pricing-container {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.pricing-card {
    flex: 1 1 280px;
    border: 1px solid var(--stone-grey);
    padding: 40px 32px;
    text-align: center;
    border-radius: 2px;
    background-color: var(--rice-paper);
}

.pricing-card.featured {
    border-color: var(--cinnabar);
    transform: translateY(-8px);
}

.price {
    font-family: var(--font-accent);
    font-size: 2.5rem;
    color: var(--pine-ink);
    margin: 16px 0;
}

.price span {
    font-size: 1rem;
    font-family: var(--font-body);
    color: var(--mist-teal-grey);
}

.pricing-card ul {
    list-style: none;
    margin: 32px 0;
    color: var(--mist-teal-grey);
}

.pricing-card li {
    margin-bottom: 16px;
}

/* Testimonials */
.testimonial-card .user {
    display: block;
    margin-top: 16px;
    font-family: var(--font-heading);
    text-align: right;
    color: var(--cinnabar);
}

/* Footer */
footer {
    border-top: 1px solid var(--stone-grey);
    padding: 48px 24px;
    text-align: center;
    margin-top: 80px;
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.footer-nav a {
    color: var(--mist-teal-grey);
    text-decoration: none;
    font-size: 0.9rem;
}

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

.copyright {
    color: var(--stone-grey);
    font-size: 0.8rem;
    font-family: var(--font-accent);
}

/* Animation */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* Responsive (Mobile view) */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 16px;
    }
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .pricing-card.featured {
        transform: translateY(0);
    }
    .cards-container, .pricing-container, .testimonials-container {
        flex-direction: column;
    }
    
    .btn {
        display: block;
        width: 100%;
        margin: 8px 0;
    }
}