@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --primary-color: #fca311;
  --secondary-color: #14213d;
  --bg-color: #fffdf5; /* Light yellow */
  --text-color: #333;
  --card-bg: #1f2336; /* Dark background from screenshot */
  --card-border: #2c314a;
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

/* Background Animation */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 24px;
  font-weight: 800;
  color: var(--secondary-color);
  text-decoration: none;
}

.logo span {
  color: var(--primary-color);
}

.nav-btn {
  background: var(--primary-color);
  color: white;
  padding: 10px 24px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(252, 163, 17, 0.3);
  transition: var(--transition);
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(252, 163, 17, 0.4);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 100px 0;
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  color: var(--secondary-color);
  margin-bottom: 20px;
}

.hero p {
  font-size: 20px;
  color: #555;
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-btn {
  display: inline-block;
  background: linear-gradient(135deg, #fca311, #ffb703);
  color: white;
  padding: 16px 40px;
  font-size: 18px;
  font-weight: 700;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 10px 25px rgba(252, 163, 17, 0.4);
  transition: var(--transition);
}

.cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(252, 163, 17, 0.5);
}

/* Pricing Section */
.pricing {
  padding: 80px 0;
  text-align: center;
}

.pricing h2, .faq h2, .seo-articles h2 {
  font-size: 36px;
  color: var(--secondary-color);
  margin-bottom: 50px;
  text-align: center;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  max-width: 1100px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 40px 30px;
  text-align: left;
  color: white;
  position: relative;
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0,0,0,0.1);
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 25px 45px rgba(0,0,0,0.2);
}

.pricing-card.recommended::before {
  content: '推荐';
  position: absolute;
  top: 20px;
  right: -30px;
  background: #a855f7;
  color: white;
  font-size: 14px;
  font-weight: bold;
  padding: 5px 30px;
  transform: rotate(45deg);
}

.pricing-card.recommended {
  border-color: #a855f7;
}

.card-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 20px;
  color: #fff;
}

.card-price {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 30px;
  display: flex;
  align-items: baseline;
}

.card-price span {
  font-size: 16px;
  font-weight: normal;
  color: #8892b0;
  margin-left: 5px;
}

.card-features {
  list-style: none;
  margin-bottom: 40px;
}

.card-features li {
  margin-bottom: 15px;
  color: #ccd6f6;
  display: flex;
  align-items: center;
}

.card-features li::before {
  content: '✓';
  color: #06b6d4;
  margin-right: 10px;
  font-weight: bold;
}

.buy-btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 14px 0;
  border-radius: 8px;
  text-decoration: none;
  color: white;
  font-weight: 600;
  background: #2d334e;
  transition: var(--transition);
}

.pricing-card.recommended .buy-btn {
  background: linear-gradient(90deg, #8b5cf6, #06b6d4);
}

.pricing-card:hover .buy-btn {
  background: #3f476a;
}
.pricing-card.recommended:hover .buy-btn {
  background: linear-gradient(90deg, #7c3aed, #0891b2);
}

/* FAQ Section */
.faq {
  padding: 80px 0;
  background: rgba(255, 255, 255, 0.5);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: white;
  border-radius: 12px;
  padding: 20px 25px;
  margin-bottom: 15px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.03);
}

.faq-q {
  font-size: 18px;
  font-weight: 600;
  color: var(--secondary-color);
  margin-bottom: 10px;
}

.faq-a {
  color: #666;
  font-size: 15px;
}

/* SEO Articles */
.seo-articles {
  padding: 60px 0;
  text-align: center;
}

.article-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}

.article-tag {
  background: white;
  color: #555;
  padding: 8px 16px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 14px;
  border: 1px solid #eaeaea;
  transition: var(--transition);
}

.article-tag:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* Footer */
footer {
  text-align: center;
  padding: 30px 0;
  background: var(--secondary-color);
  color: rgba(255,255,255,0.7);
  font-size: 14px;
}

@media (max-width: 768px) {
  .hero h1 { font-size: 40px; }
  .pricing-grid { grid-template-columns: 1fr; }
}