/* ============================================================================
   全局样式
   ============================================================================ */

:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #e0e7ff;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --text: #1e293b;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

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

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

a:hover {
  text-decoration: underline;
}

/* ============================================================================
   导航栏
   ============================================================================ */

.navbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  height: 64px;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

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

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
  text-decoration: none;
}

.nav-link:hover {
  background: var(--bg);
  color: var(--text);
  text-decoration: none;
}

.nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.balance {
  font-weight: 600;
  color: var(--primary);
  font-size: 0.9rem;
}

/* ============================================================================
   按钮
   ============================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--primary);
  color: white;
}

.btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn:active {
  transform: translateY(0);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

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

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

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

.btn-danger:hover {
  background: #dc2626;
}

.btn-success {
  background: var(--success);
}

.btn-success:hover {
  background: #16a34a;
}

/* ============================================================================
   Section 切换
   ============================================================================ */

.section {
  display: none;
  padding: 40px 0;
}

.section.active {
  display: block;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 32px;
  text-align: center;
}

/* ============================================================================
   Hero 区域
   ============================================================================ */

.hero {
  text-align: center;
  padding: 80px 20px 60px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.hero-sub {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 48px;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto 48px;
}

.feature-card {
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  opacity: 0.85;
}

.hero .btn-lg {
  background: white;
  color: var(--primary);
  font-size: 1.1rem;
  padding: 16px 48px;
}

.hero .btn-lg:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

/* ============================================================================
   服务平台
   ============================================================================ */

.filter-bar {
  margin-bottom: 32px;
}

.search-box {
  margin-bottom: 16px;
}

.search-box input {
  width: 100%;
  max-width: 400px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

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

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.service-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.service-card .service-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.service-card .service-name {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 4px;
}

.service-card .service-price {
  color: var(--primary);
  font-size: 0.85rem;
}

/* ============================================================================
   国家选择器
   ============================================================================ */

.country-selector {
  margin-bottom: 32px;
  padding: 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.country-selector h3 {
  margin-bottom: 16px;
}

.country-search-box {
  margin-bottom: 16px;
}

.country-search-box input {
  width: 100%;
  max-width: 400px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  outline: none;
}

.country-search-box input:focus {
  border-color: var(--primary);
}

.country-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
  max-height: 400px;
  overflow-y: auto;
}

.country-item {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.country-item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.country-item.selected {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.country-flag {
  font-size: 1.2rem;
}

/* ============================================================================
   价格页面
   ============================================================================ */

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

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.pricing-card h3 {
  font-size: 1.2rem;
  margin-bottom: 16px;
  color: var(--primary);
}

.pricing-card ul,
.pricing-card ol {
  padding-left: 20px;
}

.pricing-card li {
  margin-bottom: 8px;
  color: var(--text-secondary);
}

/* ============================================================================
   Dashboard
   ============================================================================ */

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 4px;
}

.activation-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.activation-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  align-items: center;
  gap: 16px;
}

.activation-item .service-info {
  font-weight: 600;
}

.activation-item .phone-info {
  font-family: monospace;
  font-size: 1.1rem;
}

.activation-item .code-info {
  font-family: monospace;
  font-size: 1.1rem;
  color: var(--success);
  font-weight: 600;
}

.activation-item .status-badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.status-waiting {
  background: #fef3c7;
  color: #92400e;
}

.status-ok {
  background: #dcfce7;
  color: #166534;
}

.status-cancelled {
  background: #fee2e2;
  color: #991b1b;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state p {
  margin-bottom: 16px;
}

/* ============================================================================
   充值页面
   ============================================================================ */

.recharge-options {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.recharge-amounts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.recharge-btn {
  padding: 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  font-size: 1.25rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.recharge-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.recharge-btn.selected {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}

.custom-amount {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
}

.custom-amount input {
  width: 150px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  text-align: center;
}

.recharge-note {
  margin-top: 16px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* 支付方式 */
.pay-methods {
  margin-bottom: 24px;
}

.pay-methods h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--text);
}

.pay-method-list {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.pay-method-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 24px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
}

.pay-method-item:hover {
  border-color: var(--primary);
}

.pay-method-item input[type="radio"] {
  display: none;
}

.pay-method-item:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
}

.pay-method-icon {
  font-size: 1.5rem;
}

/* ============================================================================
   模态框
   ============================================================================ */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 40px;
  width: 90%;
  max-width: 420px;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.modal-lg {
  max-width: 560px;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.modal-close:hover {
  background: var(--bg);
}

.modal-content h2 {
  text-align: center;
  margin-bottom: 24px;
}

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

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 0.9rem;
}

.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-bottom: 12px;
  min-height: 20px;
}

.form-switch {
  text-align: center;
  margin-top: 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ============================================================================
   购买确认
   ============================================================================ */

.buy-info {
  margin-bottom: 24px;
}

.buy-detail {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.buy-detail .label {
  color: var(--text-secondary);
}

.buy-detail .price {
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1rem;
}

.buy-result {
  text-align: center;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  margin-top: 24px;
}

.success-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.buy-result h3 {
  margin-bottom: 16px;
  color: var(--success);
}

.phone-number {
  font-family: monospace;
  font-size: 1.5rem;
  font-weight: 700;
  padding: 12px;
  background: var(--bg);
  border-radius: 8px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.activation-id {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.buy-tip {
  color: var(--warning);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.sms-status {
  padding: 16px;
  background: var(--bg);
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.buy-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
}

/* ============================================================================
   Toast 通知
   ============================================================================ */

.toast {
  position: fixed;
  top: 80px;
  right: 20px;
  padding: 16px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  animation: slideIn 0.3s ease;
  max-width: 400px;
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--danger);
}

.toast.info {
  border-left: 4px solid var(--primary);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ============================================================================
   Footer
   ============================================================================ */

.footer {
  text-align: center;
  padding: 32px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 60px;
}

/* ============================================================================
   响应式
   ============================================================================ */

@media (max-width: 768px) {
  .nav-container {
    gap: 12px;
  }

  .nav-links {
    display: none;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-sub {
    font-size: 1rem;
  }

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

  .activation-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .recharge-amounts {
    grid-template-columns: repeat(2, 1fr);
  }

  .modal {
    padding: 24px;
    margin: 20px;
  }
}

/* ============================================================================
   加载动画
   ============================================================================ */

.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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