/* Vercel黑色主题风格 - 现代化设计 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-bg: #000000;
  --secondary-bg: #111111;
  --card-bg: #1a1a1a;
  --border-color: #333333;
  --text-primary: #ffffff;
  --text-secondary: #888888;
  --accent-color: #0070f3;
  --accent-hover: #0051cc;
  --success-color: #00ff88;
  --warning-color: #ff6b35;
  --gradient-primary: linear-gradient(135deg, #0070f3 0%, #00ff88 100%);
  --gradient-card: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--primary-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo h2 {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

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

.nav-menu a:hover {
  color: var(--text-primary);
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition);
}

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

.nav-actions {
  display: flex;
  gap: 1rem;
}

.btn-secondary,
.btn-primary {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

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

.btn-secondary:hover {
  background: var(--card-bg);
  border-color: var(--accent-color);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 112, 243, 0.3);
}

/* 主要内容区域 */
main {
  margin-top: 70px;
}

/* 英雄区域 */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: radial-gradient(ellipse at center, rgba(0, 112, 243, 0.1) 0%, transparent 70%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23333" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text h2 {
  font-size: 1.5rem;
  color: var(--success-color);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.hero-text p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
}

.email-input {
  flex: 1;
  padding: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
}

.email-input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(0, 112, 243, 0.1);
}

.btn-gradient {
  padding: 1rem 2rem;
  background: var(--gradient-primary);
  border: none;
  border-radius: 8px;
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-gradient:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 112, 243, 0.3);
}

.partner-logos {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.logo-item {
  color: var(--text-secondary);
  font-weight: 600;
  opacity: 0.7;
  transition: var(--transition);
}

.logo-item:hover {
  opacity: 1;
  color: var(--text-primary);
}

/* 交易界面预览 */
.hero-visual {
  position: relative;
}

.trading-interface {
  background: var(--gradient-card);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-color);
}

.interface-header {
  margin-bottom: 2rem;
}

.interface-tabs {
  display: flex;
  gap: 1rem;
}

.tab {
  padding: 0.5rem 1rem;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.tab.active {
  background: var(--accent-color);
  color: white;
}

.price-display {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.price-main {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.price-change {
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.9rem;
}

.price-change.positive {
  background: rgba(0, 255, 136, 0.2);
  color: var(--success-color);
}

.chart-area {
  height: 200px;
  background: var(--secondary-bg);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 专业交易区域 */
.professional-trading {
  padding: 6rem 0;
  background: var(--secondary-bg);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.section-header p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.platform-image {
  width: 100%;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
}

/* 功能特色区域 */
.features {
  padding: 6rem 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--gradient-card);
  padding: 2.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 112, 243, 0.1), transparent);
  transition: var(--transition);
}

.feature-card:hover::before {
  left: 100%;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
  border-color: var(--accent-color);
}

.feature-icon {
  margin-bottom: 1.5rem;
}

.feature-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 市场概览区域 */
.market-overview {
  padding: 6rem 0;
  background: var(--secondary-bg);
}

.market-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.stat-card {
  background: var(--gradient-card);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--success-color);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-weight: 500;
}

/* 热门加密货币 */
.crypto-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.crypto-item {
  background: var(--gradient-card);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}

.crypto-item:hover {
  border-color: var(--accent-color);
  transform: translateY(-2px);
}

.crypto-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.crypto-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
}

.crypto-details h4 {
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.crypto-details span {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.crypto-price {
  text-align: right;
}

.crypto-price .price {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.crypto-price .change {
  font-size: 0.9rem;
  font-weight: 500;
}

.crypto-price .change.positive {
  color: var(--success-color);
}

.crypto-price .change.negative {
  color: var(--warning-color);
}

/* 关于我们区域 */
.about-us {
  padding: 6rem 0;
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.about-text p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  line-height: 1.8;
}

.about-stats {
  display: flex;
  gap: 3rem;
}

.stat-item {
  text-align: center;
}

.stat-item .stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--success-color);
  margin-bottom: 0.5rem;
}

.stat-item .stat-label {
  color: var(--text-secondary);
  font-weight: 500;
}

.about-logo {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-large {
  font-size: 4rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 新闻资讯区域 */
.news {
  padding: 6rem 0;
  background: var(--secondary-bg);
}

.news h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 4rem;
  color: var(--text-primary);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.news-card {
  background: var(--gradient-card);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
  border-color: var(--accent-color);
}

.news-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.news-content {
  padding: 2rem;
}

.news-content h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.news-content p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 底部区域 */
.footer {
  background: var(--primary-bg);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-section h3,
.footer-section h4 {
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.footer-section h3 {
  font-size: 1.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-section p {
  color: var(--text-secondary);
  line-height: 1.6;
}

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

.footer-section ul li {
  margin-bottom: 0.75rem;
}

.footer-section ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.footer-section ul li a:hover {
  color: var(--accent-color);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 2.5rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about-stats {
    justify-content: center;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--secondary-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}