:root {
  --bg: #0f1117;
  --bg-card: #1a1d28;
  --bg-card-hover: #222636;
  --border: #2d3142;
  --text: #e4e7ef;
  --text-dim: #8b92a8;
  --accent: #26a17b;
  --accent-hover: #2dc08c;
  --accent-dim: rgba(38, 160, 123, 0.15);
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 14px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ===== Header ===== */
.header {
  text-align: center;
  padding: 40px 0 28px;
}

.header h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.header h1 .logo-icon {
  display: inline-block;
  margin-right: 8px;
}

.header .subtitle {
  color: var(--text-dim);
  font-size: 15px;
  margin-top: 8px;
}

.badge-row {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(38, 160, 123, 0.3);
}

.badge.secondary {
  background: rgba(139, 146, 168, 0.1);
  color: var(--text-dim);
  border-color: var(--border);
}

/* ===== 链选择器 ===== */
.chain-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chain-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--bg-card);
  flex: 1;
  min-width: 120px;
}

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

.chain-option.active {
  border-color: var(--accent);
  background: rgba(38, 161, 123, 0.08);
  box-shadow: 0 0 0 3px rgba(38, 161, 123, 0.1);
}

.chain-option .chain-icon {
  font-size: 22px;
}

.chain-option .chain-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.chain-option .chain-name {
  font-size: 14px;
  font-weight: 700;
}

.chain-option .chain-short {
  font-size: 11px;
  color: var(--text-dim);
}

.chain-loading {
  color: var(--text-dim);
  font-size: 14px;
  padding: 12px 0;
}

.chain-no-chains {
  color: #e74c3c;
  font-size: 14px;
  padding: 12px 0;
}

/* ===== 商品网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 28px;
}

.card-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.card-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* 商品图片区域 */
.card-image-wrap {
  width: 100%;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  overflow: hidden;
  position: relative;
}

.card-image-wrap .card-icon {
  font-size: 48px;
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 商品信息区域 */
.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-item .card-category {
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 6px;
}

.card-item .card-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.card-item .card-desc {
  font-size: 14px;
  color: var(--text-dim);
  flex-grow: 1;
  margin-bottom: 16px;
}

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

.card-item .card-price {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent);
}

.card-item .card-price .unit {
  font-size: 14px;
  font-weight: 600;
  margin-left: 3px;
}

.card-item .card-stock {
  font-size: 13px;
  color: var(--text-dim);
}

.card-item .card-stock.out {
  color: var(--danger);
}

.btn {
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  border-radius: 10px;
  padding: 12px 24px;
  font-size: 15px;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-primary:disabled {
  background: var(--border);
  color: var(--text-dim);
  cursor: not-allowed;
}

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

.btn-danger {
  background: #e74c3c;
  color: #fff;
}
.btn-danger:hover {
  background: #c0392b;
}

.btn-secondary:hover {
  background: #3a3f55;
}

.btn-block {
  width: 100%;
}

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

/* ===== 模态框 ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 18px;
  max-width: 520px;
  width: 100%;
  padding: 32px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
}

.modal h2 {
  font-size: 22px;
  margin-bottom: 6px;
}

.modal .modal-sub {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 24px;
}

/* ===== 支付信息 ===== */
.pay-info {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}

.pay-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.pay-row:last-child {
  border-bottom: none;
}

.pay-row .label {
  color: var(--text-dim);
  font-size: 14px;
}

.pay-row .value {
  font-weight: 600;
  font-size: 15px;
}

.pay-row .value.amount {
  color: var(--accent);
  font-size: 22px;
  font-weight: 800;
}

.copy-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  margin-left: 8px;
  transition: all 0.2s;
}

.copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.address-box {
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 14px;
  font-family: "Courier New", monospace;
  font-size: 14px;
  word-break: break-all;
  text-align: center;
  margin: 10px 0;
}

/* ===== 状态提示 ===== */
.status-box {
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
}

.status-box.pending {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.status-box.delivered {
  background: rgba(38, 160, 123, 0.1);
  border: 1px solid rgba(38, 160, 123, 0.3);
}

.status-box.expired {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-box .status-icon {
  font-size: 36px;
  margin-bottom: 8px;
}

.status-box .status-text {
  font-size: 16px;
  font-weight: 600;
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 6px;
  vertical-align: middle;
}

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

/* ===== 卡密展示 ===== */
.card-result {
  background: var(--bg);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}

.card-result .result-label {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.card-result .result-content {
  font-family: "Courier New", monospace;
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  word-break: break-all;
  background: var(--accent-dim);
  padding: 12px;
  border-radius: 8px;
  user-select: all;
}

/* ===== 输入框 ===== */
.input-group {
  margin-bottom: 16px;
}

.input-group label {
  display: block;
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.input-group input,
.input-group textarea,
.input-group select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s;
}

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

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

/* ===== 管理后台 ===== */
.admin-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.nav-tab {
  padding: 10px 20px;
  cursor: pointer;
  color: var(--text-dim);
  font-weight: 600;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.nav-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
}

.stat-card .stat-label {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

th {
  background: rgba(255,255,255,0.03);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
}

.tag-pending { background: rgba(245,158,11,0.15); color: var(--warning); }
.tag-delivered { background: rgba(38,160,123,0.15); color: var(--accent); }
.tag-expired { background: rgba(239,68,68,0.15); color: var(--danger); }
.tag-out_of_stock { background: rgba(139,146,168,0.15); color: var(--text-dim); }

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 18px;
  padding: 4px 8px;
  border-radius: 6px;
  transition: background 0.2s;
}

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

.section-title {
  font-size: 20px;
  font-weight: 700;
  margin: 28px 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 30px 0;
  color: var(--text-dim);
  font-size: 13px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

/* ===== 响应式 ===== */
@media (max-width: 600px) {
  .header h1 { font-size: 26px; }
  .cards-grid { grid-template-columns: 1fr; }
  .modal { padding: 24px 20px; }
  .container { padding: 16px 12px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  table { font-size: 13px; }
  th, td { padding: 8px 10px; }
}

/* 分类标签栏 */
.category-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.category-tabs::-webkit-scrollbar { display: none; }

.cat-tab {
  padding: 8px 18px;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  user-select: none;
}
.cat-tab:hover {
  background: var(--bg-card-hover);
  color: var(--text);
  border-color: var(--accent);
}
.cat-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* 订单操作按钮 */
.btn-confirm {
  background: #27ae60;
  color: #fff;
  border: none;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  margin-right: 4px;
  transition: background 0.2s;
}
.btn-confirm:hover { background: #219a52; }
.btn-expire {
  background: #e74c3c;
  color: #fff;
  border: none;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-expire:hover { background: #c0392b; }

/* 教程编辑工具栏 */
.tutorial-toolbar {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
  padding: 8px;
  background: var(--bg);
  border-radius: 8px;
  border: 1px solid var(--border);
}
.tutorial-toolbar button {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}
.tutorial-toolbar button:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* 货币切换按钮 */
.currency-btn {
  padding: 6px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.currency-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.currency-btn:hover:not(.active) {
  border-color: var(--accent);
  color: var(--text);
}