* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f5f7fb;
  --card: #ffffff;
  --border: #e5e7eb;
  --text: #1f2937;
  --muted: #6b7280;
  --danger: #dc2626;
  --success: #16a34a;
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
}
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 14px;
}
.hidden { display: none !important; }

/* Header */
.app-header {
  background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
  color: #fff;
  padding: 18px 0;
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.header-inner h1 { font-size: 20px; font-weight: 600; }
.header-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Buttons */
.btn {
  border: none;
  cursor: pointer;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.btn-primary { background: #fff; color: var(--primary-dark); font-weight: 600; }
.btn-primary:hover { background: #eff6ff; }
.btn-secondary { background: rgba(255,255,255,0.2); color: #fff; border: 1px solid rgba(255,255,255,0.4); }
.btn-secondary:hover { background: rgba(255,255,255,0.3); }
.btn-ghost { background: rgba(255,255,255,0.15); color: #fff; border: 1px solid rgba(255,255,255,0.3); }
.btn-ghost:hover { background: rgba(255,255,255,0.25); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-edit { background: var(--primary); color: #fff; }
.btn-edit:hover { background: var(--primary-dark); }
.btn-del { background: var(--danger); color: #fff; }
.btn-del:hover { background: #b91c1c; }

/* Main */
.app-main { max-width: 1200px; margin: 0 auto; padding: 20px; }
.card {
  background: var(--card);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}
.section-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.count-badge {
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 12px;
  font-weight: 500;
}

/* Form */
.customer-form .form-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px 16px;
}
.form-item { display: flex; flex-direction: column; gap: 5px; }
.form-item-wide { grid-column: span 4; }
.form-item label { font-weight: 500; color: #374151; font-size: 13px; }
.req { color: var(--danger); }
.form-item input,
.form-item select,
.form-item textarea {
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  width: 100%;
}
.form-item input:focus,
.form-item select:focus,
.form-item textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}
.form-item input[readonly] { background: #f3f4f6; color: var(--muted); }
.address-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.form-actions { margin-top: 18px; display: flex; gap: 10px; }
.form-actions .btn-primary { background: var(--primary); color: #fff; }
.form-actions .btn-primary:hover { background: var(--primary-dark); }
.form-actions .btn-ghost { background: #f3f4f6; color: var(--text); border: 1px solid var(--border); }
.form-msg { margin-top: 10px; font-size: 13px; min-height: 18px; }
.form-msg.ok { color: var(--success); }
.form-msg.err { color: var(--danger); }

/* Filter bar */
.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  align-items: center;
}
.filter-bar input,
.filter-bar select {
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  background: #fff;
}
.filter-bar input { flex: 1; min-width: 200px; }
.filter-bar .btn-ghost { background: #f3f4f6; color: var(--text); border: 1px solid var(--border); }

/* List */
.list-container { display: flex; flex-direction: column; gap: 22px; }
.empty-tip { text-align: center; color: var(--muted); padding: 50px 0; font-size: 14px; }
.month-group { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: #fff; }
.month-group-header {
  background: linear-gradient(90deg, #eef2ff 0%, #eff6ff 100%);
  padding: 12px 18px;
  font-weight: 600;
  color: var(--primary-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 15px;
  border-bottom: 1px solid var(--border);
}
.month-group-header .month-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.month-group-header .month-label::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 16px;
  background: var(--primary);
  border-radius: 2px;
}
.month-group-header .month-count {
  color: var(--muted);
  font-weight: 400;
  font-size: 12px;
  background: #fff;
  padding: 2px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.card-grid {
  padding: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 14px;
}

.record-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow 0.15s, border-color 0.15s, transform 0.15s;
}
.record-card:hover {
  border-color: #c7d2fe;
  box-shadow: 0 4px 14px rgba(37,99,235,0.10);
  transform: translateY(-1px);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}
.card-identity { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.serial-badge {
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 6px;
  letter-spacing: 0.3px;
}
.card-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.card-phone {
  font-size: 13px;
  color: var(--muted);
  background: #f3f4f6;
  padding: 1px 8px;
  border-radius: 6px;
}
.card-amount {
  font-size: 18px;
  font-weight: 700;
  color: #b45309;
  white-space: nowrap;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 6px 0;
  border-top: 1px dashed var(--border);
  border-bottom: 1px dashed var(--border);
}

.card-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  line-height: 1.5;
}
.row-lbl {
  color: var(--muted);
  flex-shrink: 0;
  font-size: 12px;
  min-width: 36px;
}
.row-val {
  color: var(--text);
  word-break: break-all;
  flex: 1;
  min-width: 0;
}
.card-row-addr .row-val {
  color: #374151;
}
.card-row-time {
  display: flex;
  gap: 24px;
}
.card-row-time .time-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
}
.card-row-time .row-lbl {
  min-width: auto;
}

.remark-row {
  font-size: 12.5px;
  color: #4b5563;
  background: #f9fafb;
  padding: 6px 10px;
  border-radius: 6px;
  border-left: 3px solid #9ca3af;
  word-break: break-all;
}
.repurchase-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  flex-wrap: wrap;
}
.card-actions {
  display: flex;
  gap: 6px;
  margin-top: 2px;
}
.card-actions .btn-view {
  background: #f3f4f6;
  color: #374151;
  border: 1px solid var(--border);
}

.tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 12px;
  font-size: 11.5px;
  background: #e0e7ff;
  color: #3730a3;
  white-space: nowrap;
}
.tag-brand { background: #e0e7ff; color: #3730a3; }
.tag-model { background: #f0fdf4; color: #065f46; border: 1px solid #bbf7d0; }
.tag-channel { background: #fce7f3; color: #9d174d; }
.tag-type { background: #fef3c7; color: #92400e; }
.tag-year { background: #fef3c7; color: #92400e; }
.tag-env { background: #f0f9ff; color: #075985; }
.tag-yes { background: #dcfce7; color: #166534; }
.tag-no { background: #fee2e2; color: #991b1b; }
.tag-repurchase { background: #f5d0fe; color: #86198f; }

/* Modal */
.modal-root {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}
.modal-card {
  background: #fff;
  border-radius: 10px;
  max-width: 700px;
  width: 100%;
  max-height: 85vh;
  overflow: auto;
  padding: 20px;
}
.modal-title { font-size: 17px; font-weight: 600; margin-bottom: 14px; }
.detail-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 8px 16px; }
.detail-item { display: flex; flex-direction: column; gap: 2px; }
.detail-item .lbl { color: var(--muted); font-size: 12px; }
.detail-item .val { font-size: 14px; }
.modal-actions { margin-top: 18px; text-align: right; }

@media (max-width: 900px) {
  .customer-form .form-grid { grid-template-columns: repeat(2, 1fr); }
  .form-item-wide { grid-column: span 2; }
  .card-row-time { flex-wrap: wrap; gap: 10px; }
}
@media (max-width: 600px) {
  .customer-form .form-grid { grid-template-columns: 1fr; }
  .form-item-wide { grid-column: span 1; }
  .address-row { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
}