* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

:root {
  --primary-color: #6e8efb;
  --secondary-color: #a777e3;
  --accent-color: #667eea;
  --success-color: #48bb78;
  --warning-color: #f6ad55;
  --text-color: #333;
  --text-light: #fff;
  --text-muted: rgba(255, 255, 255, 0.7);
  --border-color: rgba(255, 255, 255, 0.2);
  --shadow-color: rgba(31, 38, 135, 0.15);
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-bg-strong: rgba(255, 255, 255, 0.15);
  --border-radius: 16px;
  --border-radius-lg: 24px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 20px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
}

body {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  min-height: 100vh;
  color: var(--text-light);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-md);
  flex: 1;
}

header {
  text-align: center;
  padding: var(--spacing-lg) 0;
  margin-bottom: var(--spacing-md);
}

header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.header-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 300;
}

.link-card {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 32px var(--shadow-color);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  transition: all 0.3s ease;
}

.link-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px var(--shadow-color);
}

.link-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.link-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--border-radius);
  background: var(--glass-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-light);
  flex-shrink: 0;
  border: 1px solid var(--border-color);
}

.link-info {
  flex: 1;
  min-width: 0;
}

.link-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
  word-wrap: break-word;
}

.link-url {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  word-break: break-all;
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.link-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.link-meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--spacing-xs);
}

.link-description {
  font-size: 1.1rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.05);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--accent-color);
}

.action-buttons {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.visit-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  color: var(--text-light);
  text-decoration: none;
  border-radius: var(--border-radius);
  font-size: 1.1rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  min-height: 56px;
}

.visit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  color: var(--text-light);
}

.copy-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--glass-bg);
  color: var(--text-light);
  text-decoration: none;
  border-radius: var(--border-radius);
  font-size: 1.1rem;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
  cursor: pointer;
  min-height: 56px;
}

.copy-btn:hover {
  background: var(--glass-bg-strong);
  transform: translateY(-2px);
}

.share-section {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-lg);
}

.share-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
}

.share-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.share-button {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  color: var(--text-light);
  text-decoration: none;
  transition: all 0.3s ease;
  font-size: 1.2rem;
}

.share-button:hover {
  transform: translateY(-2px);
  background: var(--glass-bg-strong);
  color: var(--text-light);
}

.share-button.qq {
  background: linear-gradient(135deg, #12b7f5, #0099e0);
}

.share-button.weibo {
  background: linear-gradient(135deg, #e6162d, #c41230);
}

.share-button.wechat {
  background: linear-gradient(135deg, #07c160, #06ad56);
}

.back-section {
  text-align: center;
  margin-top: var(--spacing-xl);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  color: var(--text-light);
  text-decoration: none;
  transition: all 0.3s ease;
  font-weight: 500;
}

.back-link:hover {
  background: var(--glass-bg-strong);
  transform: translateY(-2px);
  color: var(--text-light);
}

footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
  margin-top: var(--spacing-xl);
}

footer a {
  color: var(--text-light);
  text-decoration: none;
  transition: opacity 0.3s ease;
}

footer a:hover {
  opacity: 0.8;
}

.toast {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: var(--success-color);
  color: var(--text-light);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 1000;
  font-weight: 500;
}

.toast.show {
  transform: translateX(0);
}

.toast.error {
  background: var(--warning-color);
}

.toast.success {
  background: var(--success-color);
}

/* 移动端适配 */
@media (max-width: 768px) {
  body {
    background-attachment: scroll;
  }

  .container {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  header {
    padding: var(--spacing-md) 0;
  }

  header h1 {
    font-size: 2rem;
  }

  .link-card {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
  }

  .link-header {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }

  .link-icon {
    width: 56px;
    height: 56px;
    align-self: center;
  }

  .link-title {
    font-size: 1.5rem;
    text-align: center;
  }

  .link-meta {
    justify-content: center;
    gap: var(--spacing-sm);
  }

  .action-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .share-buttons {
    justify-content: center;
  }

  .toast {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    left: var(--spacing-sm);
    transform: translateY(-100%);
  }

  .toast.show {
    transform: translateY(0);
  }
}

@media (max-width: 480px) {
  .container {
    padding: var(--spacing-sm);
  }

  header h1 {
    font-size: 1.75rem;
  }

  .header-subtitle {
    font-size: 1rem;
  }

  .link-card {
    padding: var(--spacing-md);
  }

  .link-title {
    font-size: 1.3rem;
  }

  .link-description {
    font-size: 1rem;
    padding: var(--spacing-sm);
  }

  .link-meta {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
  }

  .visit-btn,
  .copy-btn {
    font-size: 1rem;
    min-height: 48px;
  }

  .share-button {
    width: 48px;
    height: 48px;
    font-size: 1.1rem;
  }
}

@media (max-width: 320px) {
  .container {
    padding: var(--spacing-xs);
  }

  .link-card {
    padding: var(--spacing-sm);
  }

  .share-buttons {
    gap: var(--spacing-sm);
  }
}