@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap');

:root {
  --bg-color: #2c2927;
  --text-primary: #e6e0d8;
  --text-secondary: #a39c96;
  --accent-1: #c4a482;
  --accent-2: #8a7868;
  --accent-3: #758079;
  --card-bg: rgba(74, 67, 63, 0.4);
  --card-border: rgba(196, 164, 130, 0.15);
  --glass-blur: blur(20px);
}

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

body {
  font-family: 'Outfit', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Grid Background & Shockwave */
body {
  background-image: 
    linear-gradient(rgba(196, 164, 130, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196, 164, 130, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  background-position: center top;
  transition: background-size 0.5s cubic-bezier(0.2, 1, 0.3, 1);
}

body:has(.price-card:hover) {
  background-size: 60px 60px;
}

body::after {
  content: '';
  position: fixed;
  top: 50%;
  left: 50%;
  width: 150vw;
  height: 150vh;
  transform: translate(-50%, -50%) scale(0);
  background: radial-gradient(circle, rgba(196, 164, 130, 0.15) 0%, transparent 60%);
  z-index: -1;
  pointer-events: none;
  opacity: 0;
}

body:has(.price-card:hover)::after {
  animation: shockwave-flash 1s cubic-bezier(0.1, 0.8, 0.2, 1);
}

@keyframes shockwave-flash {
  0% { transform: translate(-50%, -50%) scale(0.2); opacity: 1; }
  100% { transform: translate(-50%, -50%) scale(1.5); opacity: 0; }
}

/* Neural Value Core Pulse */
.neural-core-container {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 120px;
  margin: 0 auto 40px;
}

.neural-core {
  position: relative;
  width: 80px;
  height: 80px;
}

.core-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 2px solid var(--accent-1);
  box-shadow: 0 0 15px rgba(196, 164, 130, 0.3), inset 0 0 15px rgba(196, 164, 130, 0.3);
  animation: pulse-rotate 2s infinite cubic-bezier(0.4, 0, 0.2, 1);
}

.core-layer:nth-child(1) { border-radius: 30%; animation-duration: 3s; }
.core-layer:nth-child(2) { border-radius: 40%; animation-duration: 2.2s; animation-direction: reverse; border-color: var(--accent-2); }
.core-layer:nth-child(3) { 
  border-radius: 50%; 
  animation-duration: 1.2s; 
  width: 40px; 
  height: 40px; 
  top: 20px; 
  left: 20px; 
  background: var(--accent-1); 
  box-shadow: 0 0 30px var(--accent-1); 
  border: none;
}

@keyframes pulse-rotate {
  0% { transform: rotate(0deg) scale(0.9); }
  50% { transform: rotate(180deg) scale(1.1); box-shadow: 0 0 30px rgba(196, 164, 130, 0.8), inset 0 0 30px rgba(196, 164, 130, 0.8); }
  100% { transform: rotate(360deg) scale(0.9); }
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
header {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(44, 41, 39, 0.8);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--card-border);
}

.logo {
  font-size: 24px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.main-nav a:not(.btn) {
  font-weight: 600;
  transition: 0.3s;
  color: var(--text-primary);
}

.main-nav a:not(.btn):hover {
  color: var(--accent-1);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 30px;
  font-weight: 600;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: #fff;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(99, 102, 241, 0.6);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--accent-1);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: rgba(99, 102, 241, 0.1);
}

/* Hero Section */
.hero {
  padding: 120px 0 80px;
}

.hero-split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

.hero-content {
  flex: 1;
  text-align: left;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
}

.hero h1 {
  font-size: 64px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero h1 span {
  background: linear-gradient(135deg, #fff, var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 40px;
}

/* Cards System (Glassmorphism) */
.grid {
  display: grid;
  gap: 24px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 40px;
  backdrop-filter: var(--glass-blur);
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255,255,255, 0.2);
}

.section-title {
  text-align: center;
  font-size: 40px;
  margin-bottom: 60px;
  font-weight: 800;
}

/* Features */
.features { padding: 80px 0; }
.feature-icon {
  width: 64px;
  height: 64px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-1);
}

.feature-icon svg { width: 32px; height: 32px; }

.features h3 { font-size: 24px; margin-bottom: 16px; }
.features p { color: var(--text-secondary); }

/* Streaming & AI */
.streaming-ai { padding: 80px 0; }
.ai-card {
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 60px;
}
.ai-content { flex: 1; }
.ai-visual { 
  flex: 1; 
  display: flex; 
  flex-wrap: wrap; 
  gap: 16px; 
  justify-content: center;
}
.tag {
  padding: 12px 24px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 30px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: 0.3s;
}
.tag:hover {
  background: var(--accent-1);
  border-color: var(--accent-1);
}

/* Pricing */
.pricing { padding: 80px 0; }
.price-card {
  text-align: center;
  position: relative;
  overflow: hidden;
}
.price-card.popular {
  border-color: var(--accent-1);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.1);
}
.price-card.popular::before {
  content: '最受欢迎';
  position: absolute;
  top: 16px;
  right: -32px;
  background: var(--accent-1);
  font-size: 12px;
  padding: 4px 40px;
  transform: rotate(45deg);
  font-weight: 800;
}
.price-card h3 { font-size: 24px; margin-bottom: 8px; }
.price-amount { font-size: 48px; font-weight: 800; margin: 24px 0; }
.price-amount span { font-size: 16px; color: var(--text-secondary); font-weight: 400; }
.price-features { list-style: none; margin-bottom: 32px; text-align: left; }
.price-features li {
  margin-bottom: 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.price-features li::before {
  content: '✓';
  color: var(--accent-3);
  font-weight: 800;
}

/* FAQ */
.faq { padding: 80px 0; }
details {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  margin-bottom: 16px;
  padding: 20px;
  transition: 0.3s;
}
details[open] {
  border-color: var(--accent-1);
}
summary {
  font-weight: 600;
  font-size: 18px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
}
summary::after {
  content: '+';
  color: var(--accent-1);
  transition: 0.3s;
}
details[open] summary::after { content: '−'; }
.faq-content {
  margin-top: 16px;
  color: var(--text-secondary);
}

/* Reviews */
.reviews { padding: 80px 0; }
.review-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.stars { color: #facc15; font-size: 20px; }
.reviewer { display: flex; align-items: center; gap: 12px; margin-top: auto; pt: 16px; border-top: 1px solid var(--card-border); padding-top: 16px; }
.avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--accent-2); display: flex; align-items: center; justify-content: center; font-weight: bold; }

/* Footer */
footer {
  border-top: 1px solid var(--card-border);
  padding: 60px 0;
  background: rgba(0,0,0,0.5);
  margin-top: 80px;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
}
.footer-brand { max-width: 300px; }
.footer-brand p { color: var(--text-secondary); margin-top: 16px; }
.footer-links h4 { font-size: 18px; margin-bottom: 24px; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { color: var(--text-secondary); transition: 0.3s; }
.footer-links a:hover { color: var(--accent-1); }
.copyright {
  text-align: center;
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--card-border);
  color: var(--text-secondary);
}

/* Subpages Content */
.page-header {
  padding: 80px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 60px;
}
.page-content {
  max-width: 800px;
  margin: 0 auto 100px;
}
.page-content h2 {
  font-size: 28px;
  margin: 40px 0 20px;
  color: var(--accent-1);
}
.page-content p {
  margin-bottom: 24px;
  color: var(--text-secondary);
}
.page-content ul {
  margin-bottom: 24px;
  padding-left: 24px;
  color: var(--text-secondary);
}
.page-content li { margin-bottom: 8px; }

/* Responsive */
@media (max-width: 992px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .ai-card { flex-direction: column; }
  .hero-split { flex-direction: column; text-align: center; gap: 40px; }
  .hero-content { text-align: center; }
  .hero h1 { font-size: 48px; }
  .hero-content .btn { width: 100%; display: block; margin-bottom: 16px; }
}
@media (max-width: 768px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  
  header { flex-direction: column; gap: 16px; padding: 16px 0; }
  .main-nav { flex-wrap: wrap; justify-content: center; gap: 12px; }
  
  .hero { padding: 60px 0 40px; }
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 16px; margin-bottom: 30px; }
  
  .btn {
    padding: 16px 32px;
    font-size: 18px;
    width: 100%;
    display: block;
    margin: 0 auto;
  }
  
  header .btn { 
    width: auto; 
    padding: 8px 24px; 
    font-size: 16px;
  }

  .card { padding: 24px; }
  .ai-card { padding: 32px 24px; }
  .section-title { font-size: 32px; margin-bottom: 40px; }
  
  .footer-grid { 
    flex-direction: column; 
    align-items: center; 
    text-align: center; 
    gap: 32px; 
  }
  .footer-brand { max-width: 100%; }
}