@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@1,600&family=IBM+Plex+Mono&family=Noto+Sans+SC:wght@400;500&display=swap');

:root {
  --bg: #101815;
  --panel: #161F1B;
  --ink: #DCE8E0;
  --dim: #7A8F85;
  --line: rgba(220, 232, 224, 0.09);
  --acc: #7FB8A8;
  --acc-hover: rgba(127, 184, 168, 0.5);
  
  --font-serif: "Cormorant Garamond", serif;
  --font-mono: "IBM Plex Mono", monospace;
  --font-sans: "Noto Sans SC", sans-serif;
  --transition: all 0.3s ease;
}

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

/* Hide default cursor to use custom canvas cursor */
@media (pointer: fine) {
  * { cursor: none !important; }
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  background-color: var(--bg);
  color: var(--ink);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* Canvas Background & Corner Texts (Injected by JS) */
#ripple-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

.corner-text {
  position: fixed;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  z-index: -1;
}
.corner-tl { top: 20px; left: 20px; }
.corner-br { bottom: 20px; right: 20px; color: var(--acc); font-weight: bold; }
.corner-bl { bottom: 20px; left: 20px; }
.corner-tc { top: 20px; left: 50%; transform: translateX(-50%); }

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 600;
  color: var(--ink);
  transition: var(--transition);
}

h1:hover, h2:hover, h3:hover {
  letter-spacing: 0.05em;
  transform: skewX(-2deg);
}

.gradient-text {
  color: var(--ink); /* Remove gradient, use pure color */
}

/* Data / Tags */
.tag, .popular-badge, .btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Layout Utilities */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 100px 0; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-muted { color: var(--dim); }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }
.mt-4 { margin-top: 1rem; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 4px;
  transition: var(--transition);
  border: 1px solid var(--line);
  text-align: center;
  min-height: 44px;
  line-height: 20px;
  background: var(--panel);
  color: var(--ink);
}

.btn-primary {
  background: var(--acc);
  color: var(--bg); /* 实底按钮配深字 */
  border-color: var(--acc);
  font-weight: bold;
}

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

.btn-outline {
  background: transparent;
  color: var(--ink);
}

.btn-outline:hover {
  border-color: var(--acc-hover);
  color: var(--acc);
}

.btn-block { display: block; width: 100%; }

/* Cards (Replacing glassmorphism with solid dark panel and 1px border) */
.glass-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 40px;
  transition: var(--transition);
  animation: revealUp 0.8s ease forwards;
}

.glass-card:hover {
  border-color: var(--acc-hover);
  transform: translateY(-2px);
}

.glass-card:hover h3, .glass-card:hover h4 {
  color: var(--acc);
}

@keyframes revealUp {
  0% { transform: translateY(24px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

/* Header */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 20px 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

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

.logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-style: italic;
  font-weight: 600;
  color: var(--ink);
}

.nav-links { display: flex; gap: 30px; }
.nav-links a {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--dim);
  transition: var(--transition);
  text-transform: uppercase;
}
.nav-links a:hover { color: var(--acc); }

/* Hero Section */
.hero { padding-top: 180px; padding-bottom: 120px; }
.hero-glow { display: none; /* No glowing backgrounds allowed */ }
.hero h1 { font-size: 4rem; line-height: 1.1; margin-bottom: 24px; color: var(--ink); }
.hero p {
  font-size: 1rem;
  color: var(--dim);
  max-width: 600px;
  margin: 0 auto 40px auto;
}
.hero p strong { color: var(--ink); }
.hero-btns { display: flex; justify-content: center; gap: 16px; }

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 60px;
}

.feature-icon {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--acc);
  margin-bottom: 20px;
}

.glass-card h3 { font-size: 1.5rem; margin-bottom: 12px; }
.glass-card p { color: var(--dim); font-size: 0.95rem; }

/* Media & AI Section */
.tags-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
}

.tag {
  border: 1px solid var(--line);
  padding: 8px 20px;
  border-radius: 4px;
  transition: var(--transition);
  color: var(--dim);
  background: var(--bg);
}

.tag:hover {
  border-color: var(--acc-hover);
  color: var(--acc);
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 60px;
}

.pricing-card { display: flex; flex-direction: column; position: relative; background: var(--panel); border-color: var(--line); }
.pricing-card.popular { border-color: var(--acc); transform: none; background: var(--panel); }
.pricing-card.popular:hover { transform: translateY(-2px); }

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--acc);
  color: var(--bg);
  padding: 4px 16px;
  border-radius: 4px;
}

.price {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 3rem;
  font-weight: 600;
  margin: 20px 0;
  color: var(--ink);
}

.price span { font-size: 1rem; color: var(--dim); font-style: normal; font-family: var(--font-sans); }

.features-list { margin: 30px 0; flex-grow: 1; }
.features-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--dim);
  font-size: 0.95rem;
}
.features-list li::before { content: "·"; color: var(--acc); font-weight: bold; }

/* FAQ Section */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  max-width: 800px;
  margin: 60px auto 0 auto;
}

.faq-item { text-align: left; padding: 24px; }
.faq-item h4 { font-size: 1.2rem; margin-bottom: 10px; color: var(--ink); }

/* Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 60px;
}

.review-card { text-align: left; }
.review-stars { color: var(--acc); margin-bottom: 15px; font-size: 1rem; letter-spacing: 0.2em; font-family: var(--font-mono); }
.user-info { display: flex; align-items: center; gap: 12px; margin-top: 20px; }
.avatar { width: 40px; height: 40px; border-radius: 4px; border: 1px solid var(--line); background: var(--bg); }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 60px 0; margin-top: 60px; }
.footer-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--dim); font-size: 0.9rem; transition: var(--transition); }
.footer-links a:hover { color: var(--acc); }
.copyright { color: var(--dim); font-family: var(--font-mono); font-size: 10px; }

/* Subpages Specific */
.subpage-header { padding-top: 150px; padding-bottom: 60px; }
.subpage-content { max-width: 800px; margin: 0 auto; color: var(--dim); }
.subpage-content h1, .subpage-content h2, .subpage-content h3 { color: var(--ink); margin: 40px 0 20px 0; }
.subpage-content p { margin-bottom: 20px; }
.subpage-content ul { list-style: none; margin-left: 0; margin-bottom: 20px; }
.subpage-content li { margin-bottom: 10px; padding-left: 15px; position: relative; }
.subpage-content li::before { content: "·"; color: var(--acc); position: absolute; left: 0; top: 0; font-weight: bold; }
.subpage-content a { color: var(--acc); }

/* Responsive Design */
@media (max-width: 992px) {
  .features-grid, .pricing-grid, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 2.5rem; }
  .hero-btns { flex-direction: column; }
  .features-grid, .pricing-grid, .reviews-grid { grid-template-columns: 1fr; }
  .footer-content { flex-direction: column; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }
}

/* Reduced Motion fallback */
@media (prefers-reduced-motion: reduce) {
  #ripple-canvas { display: none; }
  * { cursor: auto !important; }
}

/* Accessibility & Enhancements */
.skip-link {
    position: absolute;
    top: -100px;
    left: 20px;
    background: var(--acc);
    color: var(--bg);
    padding: 10px 20px;
    z-index: 9999;
    font-weight: bold;
    border-radius: 4px;
    transition: top 0.3s ease;
}
.skip-link:focus {
    top: 20px;
}

/* Fixed Header Offset */
:target, .section {
    scroll-margin-top: 80px;
}

/* FAQ Details */
details.faq-item summary {
    cursor: pointer;
    outline: 2px solid transparent;
}
details.faq-item summary:focus-visible {
    outline: 2px solid var(--acc);
    border-radius: 4px;
}
details.faq-item[open] p {
    margin-top: 10px;
    animation: fadeIn 0.3s ease;
}