/* ========== 基础样式 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #dbeafe;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --text-color: #1f2937;
  --text-light: #6b7280;
  --bg-color: #f3f4f6;
  --card-bg: #ffffff;
  --border-color: #e5e7eb;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

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

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

/* ========== 导航栏 ========== */
.navbar {
  background: var(--card-bg);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ========== 主要内容 ========== */
main {
  min-height: calc(100vh - 60px - 60px);
  padding: 40px 0;
}

/* ========== 首页 Hero ========== */
.hero {
  text-align: center;
  padding: 80px 20px;
  background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
  border-radius: 16px;
  color: white;
  margin-bottom: 60px;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 16px;
}

.hero p {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* ========== 特性展示 ========== */
.features {
  margin-bottom: 60px;
}

.features h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 40px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--card-bg);
  padding: 32px;
  border-radius: 12px;
  text-align: center;
  box-shadow: var(--shadow);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-light);
}

/* ========== 价格方案 ========== */
.pricing {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 60px;
}

.pricing h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 40px;
  width: 100%;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  width: 100%;
  max-width: 900px;
}

.pricing-card {
  background: var(--card-bg);
  padding: 40px;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--primary-color);
  transform: scale(1.02);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: white;
  padding: 6px 16px;
  border-radius: 20px;
  font-weight: bold;
  font-size: 0.875rem;
}

.pricing-header {
  text-align: center;
  margin-bottom: 24px;
}

.pricing-header h3 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
}

.price .amount {
  font-size: 4rem;
  font-weight: bold;
  color: var(--primary-color);
}

.price .unit {
  color: var(--text-light);
}

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

.pricing-features li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--bg-color);
  color: var(--text-color);
  border: 2px solid var(--border-color);
}

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

.btn-lg {
  padding: 14px 28px;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.875rem;
}

.btn-block {
  display: block;
  width: 100%;
}

/* ========== 认证页面 ========== */
.auth-container {
  display: flex;
  justify-content: center;
  padding: 40px 20px;
}

.auth-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
}

.auth-card h1 {
  text-align: center;
  margin-bottom: 8px;
}

.auth-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 24px;
}

.auth-form .form-group {
  margin-bottom: 20px;
}

.auth-form label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.auth-form input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
}

.auth-form input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.auth-footer {
  text-align: center;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.auth-footer a {
  color: var(--primary-color);
}

/* ========== 提示框 ========== */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.alert-error {
  background: #fef2f2;
  color: var(--danger-color);
  border: 1px solid #fecaca;
}

.alert-success {
  background: #ecfdf5;
  color: var(--success-color);
  border: 1px solid #a7f3d0;
}

/* ========== 控制台 ========== */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.page-header h1 {
  font-size: 1.75rem;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 24px;
  margin-bottom: 24px;
}

.dashboard-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.dashboard-card h2 {
  font-size: 1.25rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
}

.quota-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

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

.quota-value {
  display: block;
  font-size: 2rem;
  font-weight: bold;
  color: var(--primary-color);
}

.quota-value.used {
  color: var(--warning-color);
}

.quota-value.remaining {
  color: var(--success-color);
}

.quota-label {
  color: var(--text-light);
  font-size: 0.875rem;
}

.api-key-section {
  margin-top: 16px;
}

.api-key-section label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.api-key-display {
  display: flex;
  gap: 8px;
}

.api-key-display code {
  flex: 1;
  background: var(--bg-color);
  padding: 12px;
  border-radius: 8px;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.875rem;
  word-break: break-all;
}

.hint {
  color: var(--text-light);
  font-size: 0.875rem;
  margin-top: 8px;
}

.code-block {
  background: #1f2937;
  border-radius: 8px;
  overflow: hidden;
}

.code-header {
  background: #374151;
  padding: 8px 16px;
  color: #9ca3af;
  font-size: 0.875rem;
}

.code-block pre {
  padding: 16px;
  overflow-x: auto;
}

.code-block code {
  color: #f9fafb;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.875rem;
  line-height: 1.5;
}

/* ========== 表格 ========== */
.table-container {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

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

.data-table th {
  background: var(--bg-color);
  font-weight: 600;
}

.data-table code {
  background: var(--bg-color);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.875rem;
}

/* ========== 充值页面 ========== */
.pricing-info {
  text-align: center;
  padding: 24px;
  background: var(--primary-light);
  border-radius: 8px;
  margin-bottom: 24px;
}

.price-tag .amount {
  font-size: 3rem;
  font-weight: bold;
  color: var(--primary-color);
}

.price-tag .unit {
  color: var(--text-light);
}

.quota-preview {
  text-align: center;
  padding: 16px;
  background: var(--bg-color);
  border-radius: 8px;
  margin-bottom: 20px;
}

.quota-preview .highlight {
  font-weight: bold;
  color: var(--success-color);
}

/* ========== 微信支付 ========== */
.payment-info {
  background: var(--bg-color);
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 24px;
}

.payment-info p {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.payment-info span {
  font-weight: bold;
  color: var(--primary-color);
}

.qrcode-container {
  text-align: center;
  padding: 30px;
  background: var(--bg-color);
  border-radius: 12px;
  margin-bottom: 20px;
}

.mock-qrcode {
  width: 200px;
  height: 200px;
  margin: 0 auto;
  background: white;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.mock-qrcode p {
  font-size: 1.2rem;
  font-weight: 500;
}

.mock-qrcode .qrcode-tip {
  font-size: 0.875rem;
  color: var(--text-light);
}

.scan-tip {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 20px;
}

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

.payment-status {
  text-align: center;
  padding: 16px;
  margin-top: 20px;
  background: var(--primary-light);
  border-radius: 8px;
  color: var(--primary-color);
  font-weight: 500;
}

.status-waiting,
.status-checking,
.status-success {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.loading {
  animation: spin 1s linear infinite;
  display: inline-block;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.success-icon {
  font-size: 1.2rem;
}

.payment-result {
  text-align: center;
  padding: 40px 20px;
}

.payment-result .result-icon {
  font-size: 5rem;
  margin-bottom: 20px;
}

.payment-result h1,
.payment-result h2 {
  font-size: 1.75rem;
  margin-bottom: 16px;
}

.payment-result p {
  color: var(--text-light);
  margin-bottom: 8px;
}

.payment-result .order-info {
  font-family: 'Monaco', 'Menlo', monospace;
  background: var(--bg-color);
  padding: 8px 16px;
  border-radius: 4px;
  display: inline-block;
  margin-top: 12px;
}

.result-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 30px;
}

.order-details {
  background: var(--bg-color);
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  text-align: left;
}

.detail-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.detail-item:last-child {
  border-bottom: none;
}

.detail-item span {
  color: var(--text-light);
}

.detail-item strong {
  color: var(--success-color);
}

.detail-item code {
  background: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.875rem;
}

/* ========== API文档 ========== */
.docs-container {
  max-width: 900px;
  margin: 0 auto;
}

.docs-container h1 {
  font-size: 2rem;
  margin-bottom: 32px;
}

.docs-section {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.docs-section h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
}

.docs-section h3 {
  font-size: 1.25rem;
  margin: 24px 0 12px;
}

.docs-section h4 {
  font-size: 1rem;
  margin: 20px 0 12px;
  color: var(--text-light);
}

.docs-section p {
  margin-bottom: 16px;
}

.api-endpoint {
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
}

.api-endpoint:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.endpoint-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.method {
  padding: 4px 12px;
  border-radius: 4px;
  font-weight: bold;
  font-size: 0.875rem;
}

.method.get {
  background: #dbeafe;
  color: #1e40af;
}

.params-table {
  width: 100%;
  margin: 16px 0;
  border-collapse: collapse;
}

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

.params-table th {
  background: var(--bg-color);
  font-weight: 600;
}

.note {
  background: #fef3c7;
  color: #92400e;
  padding: 12px;
  border-radius: 8px;
  margin: 16px 0;
}

/* ========== 包年套餐徽章 ========== */
.yearly-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  border-radius: 8px;
  margin-bottom: 16px;
  color: white;
  font-weight: 600;
}

.badge-icon {
  font-size: 1.5rem;
}

.badge-text {
  font-size: 1.1rem;
}

.badge-status {
  background: rgba(255, 255, 255, 0.2);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.875rem;
}

.expire-info {
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.quota-stats.single {
  grid-template-columns: repeat(2, 1fr);
}

.quota-value.unlimited {
  color: var(--warning-color);
  font-size: 2.5rem;
}

/* ========== 价格标签页 ========== */
.pricing-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--border-color);
}

.pricing-tabs .tab {
  flex: 1;
  padding: 12px 20px;
  text-align: center;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
  font-weight: 500;
}

.pricing-tabs .tab:hover {
  color: var(--primary-color);
}

.pricing-tabs .tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.pricing-section {
  display: none;
}

.pricing-section.active {
  display: block;
}

.pricing-info.yearly {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
}

.yearly-desc {
  margin-top: 12px;
  color: var(--text-light);
  font-size: 1rem;
}

.yearly-features {
  background: var(--bg-color);
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 24px;
}

.yearly-features ul {
  list-style: none;
}

.yearly-features li {
  padding: 8px 0;
  color: var(--text-color);
}

/* ========== 空状态 ========== */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  background: var(--card-bg);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: 20px;
}

.empty-state h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.empty-state p {
  color: var(--text-light);
}

/* ========== 错误页面 ========== */
.error-page {
  text-align: center;
  padding: 100px 20px;
}

.error-page h1 {
  font-size: 6rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.error-page p {
  font-size: 1.5rem;
  color: var(--text-light);
  margin-bottom: 30px;
}

/* ========== 页脚 ========== */
footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: 20px 0;
  text-align: center;
  color: var(--text-light);
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

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

  .nav-links {
    gap: 16px;
  }

  .quota-stats {
    grid-template-columns: 1fr;
  }

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

  .api-key-display {
    flex-direction: column;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .pricing-card.featured {
    transform: none;
  }
}