:root {
  --primary: #22c55e;
  --primary-dark: #16a34a;
  --secondary: #3b82f6;
  --bg: #0f172a;
  --bg-card: #111827;
  --bg-input: #0b1220;
  --text: #e5e7eb;
  --text-muted: #9ca3af;
  --border: #374151;
  --danger: #ef4444;
  --warning: #f59e0b;
  --success: #22c55e;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

.container {
  width: min(1200px, 94vw);
  margin: 0 auto;
  padding: 0 16px;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary-dark);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(90deg, var(--primary-dark), var(--primary));
  color: #04130a;
}

.btn-primary:hover {
  filter: brightness(1.1);
  color: #04130a;
}

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

.btn-outline:hover {
  background: var(--bg-card);
  color: var(--text);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.logo-icon {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 14px;
}

.nav {
  display: flex;
  gap: 24px;
}

.nav-link {
  color: var(--text-muted);
  font-size: 14px;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text);
}

.header-actions {
  display: flex;
  gap: 12px;
}

.hero {
  padding: 80px 0;
  background: radial-gradient(circle at top, #1e293b, var(--bg) 50%);
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
}

.stat {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 48px;
}

.products {
  padding: 80px 0;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  position: relative;
  transition: transform 0.2s, border-color 0.2s;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
}

.product-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--primary);
  color: #04130a;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.product-header {
  margin-bottom: 24px;
}

.product-name {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-desc {
  color: var(--text-muted);
  font-size: 14px;
}

.product-price {
  margin-bottom: 24px;
}

.price-currency {
  font-size: 24px;
  font-weight: 600;
  color: var(--primary);
}

.price-value {
  font-size: 48px;
  font-weight: 800;
  color: var(--primary);
}

.price-value.custom {
  font-size: 24px;
}

.price-period {
  font-size: 14px;
  color: var(--text-muted);
}

.product-features {
  list-style: none;
  margin-bottom: 24px;
}

.product-features li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.check {
  color: var(--primary);
  font-weight: 700;
}

.features {
  padding: 80px 0;
  background: var(--bg-card);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  text-align: center;
  padding: 32px;
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.feature-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-desc {
  color: var(--text-muted);
  font-size: 14px;
}

.reviews {
  padding: 80px 0;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.review-rating {
  margin-bottom: 12px;
}

.review-content {
  margin-bottom: 16px;
  font-size: 14px;
}

.review-author {
  color: var(--text-muted);
  font-size: 12px;
}

.faq {
  padding: 80px 0;
  background: var(--bg-card);
}

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

.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
}

.faq-question:hover {
  background: var(--bg);
}

.faq-toggle {
  font-size: 20px;
  color: var(--primary);
}

.faq-answer {
  padding: 0 20px 16px;
  color: var(--text-muted);
  font-size: 14px;
  display: none;
}

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

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.contact {
  padding: 80px 0;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
}

.contact-icon {
  font-size: 24px;
}

.contact-form h3 {
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

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

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 14px;
}

.page-header {
  padding: 48px 0;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-subtitle {
  color: var(--text-muted);
}

.page-content {
  padding: 48px 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}

.alert-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid var(--success);
  color: var(--success);
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid var(--warning);
  color: var(--warning);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg-input);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
}

td {
  font-size: 14px;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: var(--bg-input);
}

.chip {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  background: var(--bg-input);
  border: 1px solid var(--border);
}

.chip-success {
  background: rgba(34, 197, 94, 0.1);
  border-color: var(--success);
  color: var(--success);
}

.chip-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--warning);
  color: var(--warning);
}

.chip-danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
  color: var(--danger);
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.pagination button {
  padding: 8px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
}

.pagination button:hover {
  background: var(--bg-card);
}

.pagination button.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #04130a;
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  max-width: 500px;
  width: 90%;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.modal-title {
  font-size: 20px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text);
}

.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 48px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 32px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

  .nav {
    display: none;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* 支付方式选择样式 */
.payment-section {
  margin: 24px 0;
}

.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.payment-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.payment-option {
  cursor: pointer;
}

.payment-option input[type="radio"] {
  display: none;
}

.payment-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--bg-input);
  border: 2px solid var(--border);
  border-radius: 12px;
  transition: all 0.2s ease;
}

.payment-option input[type="radio"]:checked + .payment-card {
  border-color: var(--primary);
  background: rgba(34, 197, 94, 0.1);
}

.payment-card:hover {
  border-color: var(--primary);
}

.payment-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border-radius: 10px;
}

.payment-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.payment-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.payment-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.payment-check {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--border);
  border-radius: 50%;
  color: transparent;
  font-size: 14px;
  transition: all 0.2s ease;
}

.payment-option input[type="radio"]:checked + .payment-card .payment-check {
  background: var(--primary);
  color: #04130a;
}

@media (max-width: 480px) {
  .payment-card {
    padding: 12px;
    gap: 12px;
  }

  .payment-icon {
    width: 40px;
    height: 40px;
  }

  .payment-name {
    font-size: 14px;
  }

  .payment-desc {
    font-size: 12px;
  }
}