/* AICoin3官方网站样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #0066ff;
  --primary-dark: #0052cc;
  --secondary: #111827;
  --accent: #00ffc8;
  --text-light: #f3f4f6;
  --text-dark: #1f2937;
  --background: #ffffff;
  --background-alt: #f9fafb;
  --card-bg: #ffffff;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
  --radius: 12px;
  --transition: all 0.3s ease;
}

body {
  font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.7;
  color: var(--text-dark);
  background-color: var(--background);
  overflow-x: hidden;
}

/* 导航栏样式 */
header {
  background: linear-gradient(135deg, var(--secondary), #0f172a);
  padding: 1.5rem 8%;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

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

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-light);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

.nav-links a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--accent);
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

/* 首屏样式 - 左右布局 */
.hero {
  display: flex;
  align-items: center;
  padding: 6rem 8%;
  background: linear-gradient(135deg, #f8fafc, #e0f2fe);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.05) 0%, transparent 70%);
  z-index: 0;
}

.hero-content {
  flex: 1;
  padding-right: 4rem;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3.5rem;
  color: var(--secondary);
  margin-bottom: 1.5rem;
  line-height: 1.2;
  font-weight: 800;
  background: linear-gradient(to right, var(--secondary), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: #4b5563;
  margin-bottom: 2.5rem;
  max-width: 550px;
  font-weight: 500;
}

/* 下载按钮样式 */
.downlbtnvmmn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: var(--transition);
  box-shadow: 0 10px 25px -5px rgba(0, 102, 255, 0.3);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.downlbtnvmmn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition);
}

.downlbtnvmmn:hover::before {
  left: 100%;
}

.downlbtnvmmn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px -5px rgba(0, 102, 255, 0.4);
}

.downlbtnvmmn i {
  margin-right: 0.8rem;
  font-size: 1.2rem;
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.hero-image img:hover {
  transform: scale(1.02);
}

/* 特性部分 */
.features {
  padding: 8rem 8%;
  background-color: var(--background);
}

.section-header {
  text-align: center;
  margin-bottom: 5rem;
}

.section-header h2 {
  font-size: 2.5rem;
  color: var(--secondary);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

.section-header p {
  font-size: 1.1rem;
  color: #6b7280;
  max-width: 600px;
  margin: 0 auto;
}

.feature-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

.feature-card {
  background-color: var(--card-bg);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
}

.feature-card i {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 1.5rem;
  background-color: #f0f7ff;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-card h3 {
  font-size: 1.4rem;
  color: var(--secondary);
  margin-bottom: 1rem;
}

.feature-card p {
  color: #6b7280;
  line-height: 1.6;
}

/* 价格部分 */
.pricing {
  padding: 8rem 8%;
  background-color: var(--background-alt);
}

.pricing-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.pricing-card {
  background-color: var(--card-bg);
  padding: 3rem;
  border-radius: var(--radius);
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.pricing-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
}

.pricing-card.popular {
  transform: scale(1.03);
  box-shadow: 0 20px 40px -10px rgba(0, 102, 255, 0.2);
}

.pricing-card.popular::before {
  content: '最受欢迎';
  position: absolute;
  top: 20px;
  right: -40px;
  background-color: var(--primary);
  color: white;
  padding: 0.3rem 3rem;
  transform: rotate(45deg);
  font-size: 0.8rem;
  font-weight: 600;
  z-index: 1;
}

.pricing-card h3 {
  font-size: 1.6rem;
  color: var(--secondary);
  margin-bottom: 1rem;
}

.pricing-card .price {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1.5rem;
}

.pricing-card .price span {
  font-size: 1rem;
  color: #6b7280;
  font-weight: normal;
}

.pricing-card ul {
  list-style: none;
  margin-bottom: 2.5rem;
  text-align: left;
}

.pricing-card li {
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  color: #6b7280;
}

.pricing-card li i {
  color: #10b981;
  margin-right: 0.8rem;
  margin-top: 0.3rem;
}

/* 常见问题部分 */
.faq {
  padding: 8rem 8%;
  background-color: var(--background);
}

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

.faq-item {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid #e5e7eb;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  cursor: pointer;
  font-weight: 600;
  color: var(--secondary);
  font-size: 1.1rem;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-question i {
  color: var(--primary);
  transition: var(--transition);
}

.faq-answer {
  padding: 0 0 1.5rem 0;
  color: #6b7280;
  display: none;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

/* 联系我们部分 */
.contact {
  padding: 8rem 8%;
  background: linear-gradient(135deg, #f8fafc, #e0f2fe);
}

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.contact-info {
  background-color: var(--card-bg);
  padding: 3rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-info h2 {
  font-size: 1.8rem;
  color: var(--secondary);
  margin-bottom: 1.5rem;
}

.contact-info p {
  color: #6b7280;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.contact-detail {
  margin-bottom: 2rem;
}

.contact-detail h3 {
  display: flex;
  align-items: center;
  font-size: 1.2rem;
  color: var(--secondary);
  margin-bottom: 1rem;
}

.contact-detail h3 i {
  color: var(--primary);
  margin-right: 0.8rem;
  background-color: #f0f7ff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-detail p {
  margin-left: 2.8rem;
  margin-bottom: 0.5rem;
}

.contact-form {
  background-color: var(--card-bg);
  padding: 3rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-form h2 {
  font-size: 1.8rem;
  color: var(--secondary);
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  font-family: inherit;
  transition: var(--transition);
  background-color: #f9fafb;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* 页脚样式 */
footer {
  background-color: var(--secondary);
  color: var(--text-light);
  padding: 4rem 8%;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.footer-about p {
  color: #9ca3af;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.footer-links h3 {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: var(--text-light);
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 1rem;
}

.footer-links a {
  color: #9ca3af;
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 3rem;
  margin-top: 3rem;
  border-top: 1px solid #374151;
  color: #9ca3af;
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2.8rem;
  }
  
  .hero {
    padding: 5rem 5%;
  }
  
  .features,
  .pricing,
  .faq,
  .contact {
    padding: 6rem 5%;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero {
    flex-direction: column;
    text-align: center;
    padding: 4rem 5%;
  }
  
  .hero-content {
    padding-right: 0;
    margin-bottom: 3rem;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .contact-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .section-header h2 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .downlbtnvmmn {
    padding: 0.8rem 2rem;
    font-size: 1rem;
  }
  
  .feature-cards,
  .pricing-cards {
    grid-template-columns: 1fr;
  }
  
  .pricing-card.popular {
    transform: scale(1);
  }
}