:root {
  /* Dark space theme */
  --bg-color: #050814;
  --text-color: #e2e8f0;
  --card-bg: rgba(15, 23, 42, 0.6);
  --card-border: rgba(51, 65, 85, 0.5);
  --primary-gradient: linear-gradient(to right, rgb(238, 156, 167), rgb(255, 221, 225));
  --accent-color: rgb(238, 156, 167);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
  margin: 0;
  font-family: 'Kaiti', 'STKaiti', 'KaiTi_GB2312', '楷体', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(238, 156, 167, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(45, 122, 235, 0.1) 0%, transparent 50%);
}

/* Star background */
#canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

/* Typography */
h1, h2, h3 {
  font-weight: 700;
  margin-top: 0;
}
.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

a {
  color: var(--text-color);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--accent-color);
}

/* Button */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 50px;
  font-weight: bold;
  text-transform: uppercase;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: inherit;
  font-size: 1.1rem;
}
.btn-primary {
  background: var(--primary-gradient);
  color: #1e1e1e !important;
  box-shadow: 0 4px 15px rgba(238, 156, 167, 0.4);
}
.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 25px rgba(238, 156, 167, 0.6);
  color: #000 !important;
}

/* Header */
header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 20px 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  background: rgba(5, 8, 20, 0.7);
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 24px;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-links {
  display: flex;
  gap: 30px;
}
.nav-links a {
  font-size: 16px;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 80px;
}
.hero h1 {
  font-size: 4rem;
  margin-bottom: 20px;
  line-height: 1.2;
}
.hero p {
  font-size: 1.4rem;
  color: #94a3b8;
  max-width: 700px;
  margin: 0 auto 40px;
}

/* Sections */
section {
  padding: 100px 0;
}
.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 60px;
}

/* Features grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 40px 30px;
  border-radius: 20px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-10px);
  border-color: var(--accent-color);
  box-shadow: 0 10px 30px rgba(238, 156, 167, 0.1);
}
.feature-icon {
  font-size: 3rem;
  margin-bottom: 20px;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  align-items: center;
}
.pricing-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 40px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}
.pricing-card:hover {
  transform: scale(1.02);
  border-color: var(--accent-color);
}
.pricing-card.popular {
  border-color: var(--accent-color);
  transform: scale(1.05);
  box-shadow: 0 0 40px rgba(238, 156, 167, 0.2);
}
.pricing-card.popular::before {
  content: '店长推荐';
  position: absolute;
  top: 15px;
  right: -35px;
  background: var(--primary-gradient);
  color: #000;
  padding: 5px 40px;
  transform: rotate(45deg);
  font-size: 12px;
  font-weight: bold;
}
.price {
  font-size: 3rem;
  font-weight: bold;
  margin: 20px 0;
  display: flex;
  align-items:baseline;
}
.price span {
  font-size: 1rem;
  color: #94a3b8;
  font-weight: normal;
}
.pricing-features {
  list-style: none;
  padding: 0;
  margin: 30px 0;
}
.pricing-features li {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.pricing-features li::before {
  content: '✓';
  color: var(--accent-color);
  font-weight: bold;
}
.pricing-card .btn {
  width: 100%;
  box-sizing: border-box;
}

/* Download / Platform */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}
.platform-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 30px 20px;
  border-radius: 16px;
  text-align: center;
  transition: var(--transition);
}
.platform-card:hover {
  background: rgba(238, 156, 167, 0.05);
  border-color: var(--accent-color);
}
.platform-icon {
  font-size: 3rem;
  margin-bottom: 15px;
  color: var(--text-color);
}

/* FAQ */
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  margin-bottom: 15px;
  overflow: hidden;
}
.faq-question {
  padding: 20px;
  cursor: pointer;
  font-size: 1.2rem;
  font-weight: bold;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  color: #94a3b8;
  line-height: 1.6;
}
.faq-item.active .faq-answer {
  padding: 0 20px 20px;
  max-height: 500px;
}
.faq-item.active .faq-question {
  color: var(--accent-color);
}

/* Reviews */
.reviews-wrapper {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 20px 0;
  scrollbar-width: none;
}
.reviews-wrapper::-webkit-scrollbar {
  display: none;
}
.review-card {
  min-width: 300px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 30px;
  border-radius: 20px;
}
.review-stars {
  color: #fbbf24;
  margin-bottom: 15px;
}
.review-text {
  font-style: italic;
  margin-bottom: 20px;
  color: #cbd5e1;
}
.review-author {
  font-weight: bold;
}

/* Footer & Keywords */
footer {
  border-top: 1px solid var(--card-border);
  padding: 60px 0 20px;
  background: rgba(0,0,0,0.5);
  margin-top: 100px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.seo-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px dashed var(--card-border);
}
.seo-keyword {
  font-size: 12px;
  color: #64748b;
  background: rgba(255,255,255,0.05);
  padding: 5px 12px;
  border-radius: 4px;
  transition: var(--transition);
}
.seo-keyword:hover {
  color: var(--accent-color);
  background: rgba(238, 156, 167, 0.1);
}
.copyright {
  text-align: center;
  color: #64748b;
  margin-top: 40px;
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.5rem; }
  .nav-links { display: none; } /* Simplified mobile nav */
  .footer-grid { grid-template-columns: 1fr; }
}