:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --primary-subtle: #eff6ff;
  --primary-glow: rgba(37, 99, 235, 0.25);
  
  --success: #10b981;
  --success-subtle: #ecfdf5;
  --success-glow: rgba(16, 185, 129, 0.2);
  
  --danger: #ef4444;
  --danger-subtle: #fef2f2;
  --danger-glow: rgba(239, 68, 68, 0.2);
  
  --warning: #f59e0b;
  --warning-subtle: #fffbeb;
  
  --purple: #8b5cf6;
  --purple-subtle: #f5f3ff;
  
  --bg: #f8fafc;
  --card: #ffffff;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --text: #0f172a;
  --muted: #64748b;
  --sidebar-bg: #0b0f19;
  --sidebar-card: #111827;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 25px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  background-image: 
    radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.03) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.03) 0px, transparent 50%);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; cursor: pointer; transition: color .15s; }
a:hover { color: var(--primary-dark); }

/* ===== 布局 ===== */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 220px;
  background: var(--sidebar-bg);
  background-image: linear-gradient(180deg, #0b0f19 0%, #111827 100%);
  color: #94a3b8;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  z-index: 40;
}

.logo {
  padding: 24px 20px 20px;
  font-size: 17px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  position: relative;
}
.logo::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  height: 24px;
  width: 3px;
  background: linear-gradient(180deg, #38bdf8, #2563eb);
  border-radius: 0 2px 2px 0;
  box-shadow: 0 0 10px #38bdf8;
}
.logo small {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 500;
  color: #64748b;
  margin-top: 4px;
  letter-spacing: 0px;
}
.logo small::before {
  content: "";
  width: 6px;
  height: 6px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 6px #10b981;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.nav {
  flex: 1;
  padding: 14px 10px;
  overflow-y: auto;
}
.nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: #94a3b8;
  margin-bottom: 3px;
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 500;
  transition: all .2s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
}
.nav a span.icon {
  font-size: 15px;
  width: 18px;
  display: inline-block;
  text-align: center;
  opacity: 0.8;
}
.nav a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #f1f5f9;
  transform: translateX(2px);
}
.nav a.active {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.9) 0%, rgba(29, 78, 216, 0.9) 100%);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.nav a.active span.icon {
  opacity: 1;
}

.side-foot {
  padding: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(0, 0, 0, 0.15);
}
.side-foot button {
  width: 100%;
  background: rgba(255, 255, 255, 0.06);
  color: #cbd5e1;
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 12.5px;
  padding: 8px 12px;
}
.side-foot button:hover {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  border-color: rgba(239, 68, 68, 0.3);
}

.main {
  flex: 1;
  padding: 24px 32px;
  min-width: 0;
  max-width: 1600px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}
.page-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: #0f172a;
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-title::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--primary);
  border-radius: 2px;
}

/* ===== 卡片 & 统计卡片 (Tech Cards) ===== */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: box-shadow .2s;
}
.card:hover {
  box-shadow: var(--shadow-md);
}
.card h3 {
  font-size: 15px;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

/* 现代化科技统计卡片 */
.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px 18px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all .25s cubic-bezier(0.4, 0, 0.2, 1);
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--line-strong);
}
.stat-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--line);
  transition: background .25s;
}

.stat-card.blue::after { background: linear-gradient(90deg, #38bdf8, #2563eb); }
.stat-card.green::after { background: linear-gradient(90deg, #34d399, #059669); }
.stat-card.purple::after { background: linear-gradient(90deg, #c084fc, #7c3aed); }
.stat-card.amber::after { background: linear-gradient(90deg, #fbbf24, #d97706); }
.stat-card.red::after { background: linear-gradient(90deg, #f87171, #dc2626); }

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.stat-label {
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 500;
}
.stat-tag {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg);
  color: var(--muted);
  font-weight: 600;
}

.stat-value {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #0f172a;
  font-variant-numeric: tabular-nums;
  margin: 2px 0 4px;
}
.stat-value.blue { color: #2563eb; }
.stat-value.green { color: #059669; }
.stat-value.purple { color: #7c3aed; }
.stat-value.danger { color: #dc2626; }

.stat-sub {
  font-size: 11.5px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== 精致表格 (Crisp Tables) ===== */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #fff;
}
table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
th {
  background: #f8fafc;
  color: #475569;
  font-weight: 600;
  font-size: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
  letter-spacing: 0.2px;
}
td {
  padding: 11px 14px;
  border-bottom: 1px solid #f1f5f9;
  font-size: 13.5px;
  color: #1e293b;
  white-space: nowrap;
  transition: background .12s;
}
tbody tr:last-child td {
  border-bottom: none;
}
tbody tr:hover td {
  background: #f8fafc;
}
.click-rows tbody tr:hover td {
  background: #eff6ff;
}
.click-rows tbody tr.active-row td {
  background: #dbeafe !important;
}

.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.empty {
  text-align: center;
  color: var(--muted);
  padding: 36px 16px;
  font-size: 13.5px;
}

/* ===== 状态徽章 (Modern Pill Badges) ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
}
.badge::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  display: inline-block;
}
.badge.green { background: #dcfce7; color: #15803d; }
.badge.green::before { background: #16a34a; }
.badge.blue { background: #dbeafe; color: #1d4ed8; }
.badge.blue::before { background: #2563eb; }
.badge.red { background: #fee2e2; color: #b91c1c; }
.badge.red::before { background: #dc2626; }
.badge.gray { background: #f1f5f9; color: #64748b; }
.badge.gray::before { background: #94a3b8; }
.badge.purple { background: #f3e8ff; color: #7e22ce; }
.badge.purple::before { background: #a855f7; }

.text-danger { color: #dc2626; }
.text-green { color: #059669; }
.text-muted { color: #64748b; }

/* ===== 表单控件 ===== */
input, select, textarea {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13.5px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  outline: none;
  width: 100%;
  transition: all .15s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}
input::placeholder { color: #94a3b8; }

label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: #475569;
  margin-bottom: 5px;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
}
.form-row { margin-bottom: 14px; }

/* 按钮设计 */
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  background: #e2e8f0;
  color: #334155;
  transition: all .15s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}
button:hover {
  background: #cbd5e1;
  transform: translateY(-1px);
}
button:active {
  transform: translateY(0);
}
button:disabled {
  opacity: .5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
  color: #fff;
}
.btn-danger {
  background: #fee2e2;
  color: #dc2626;
  border-color: #fecaca;
}
.btn-danger:hover {
  background: #fecaca;
  color: #b91c1c;
}
.btn-large-danger {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%) !important;
  color: #fff !important;
  font-weight: 700;
  font-size: 14.5px;
  padding: 12px 24px;
  width: 100%;
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.25);
}
.btn-large-danger:hover {
  background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%) !important;
  box-shadow: 0 6px 18px rgba(220, 38, 38, 0.35);
}
.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 6px;
  font-weight: 500;
}

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.toolbar input, .toolbar select { width: auto; }

/* ===== 弹窗 (Glass Mask & Modal) ===== */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 6vh 16px;
  z-index: 60;
  overflow-y: auto;
  animation: fadeIn .15s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.modal {
  background: #fff;
  border-radius: 14px;
  padding: 24px;
  width: 100%;
  max-width: 640px;
  box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.25);
  border: 1px solid var(--line);
  animation: slideUp .2s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes slideUp {
  from { transform: translateY(12px) scale(0.98); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}
.modal h3 {
  font-size: 17px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

/* 订单明细编辑表 */
.items-edit { width: 100%; }
.items-edit th { font-size: 12px; background: #f8fafc; }
.items-edit td { padding: 6px 4px; }
.items-edit select, .items-edit input { padding: 6px 8px; }
.del-row {
  background: none;
  color: var(--muted);
  font-size: 18px;
  padding: 2px 8px;
  border-radius: 4px;
}
.del-row:hover { color: var(--danger); background: #fee2e2; }
.total-line {
  display: flex;
  justify-content: flex-end;
  gap: 16px;
  align-items: center;
  padding: 14px 4px 4px;
  font-size: 14.5px;
  flex-wrap: wrap;
}

/* ===== Toast 提示 ===== */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #0f172a;
  color: #fff;
  padding: 10px 22px;
  border-radius: 999px;
  z-index: 100;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
  max-width: 90vw;
  font-weight: 500;
  font-size: 13.5px;
  animation: slideDown .2s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
@keyframes slideDown {
  from { transform: translate(-50%, -10px); opacity: 0; }
  to { transform: translate(-50%, 0); opacity: 1; }
}
.toast.err { background: #dc2626; }
.toast.ok { background: #059669; }

/* ===== 登录页 (Tech Gradient Cover) ===== */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0b0f19;
  background-image: 
    radial-gradient(circle at 50% 20%, rgba(37, 99, 235, 0.15) 0%, transparent 60%),
    radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
}
.login-box {
  background: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 36px 32px;
  width: 360px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  color: #f1f5f9;
}
.login-box h1 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  color: #fff;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.login-box p {
  color: #64748b;
  font-size: 12.5px;
  margin-bottom: 24px;
}
.login-box label { color: #94a3b8; }
.login-box input {
  background: rgba(11, 15, 25, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
}
.login-box input:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

/* ===== 报表折叠分项 (Tech Accordions) ===== */
.sec {
  background: var(--card);
  border-radius: var(--radius);
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: all .2s;
}
.sec:hover { border-color: var(--line-strong); }
.sec-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
  background: #fff;
  transition: background .15s;
}
.sec-head:hover { background: #f8fafc; }
.sec-head .title {
  font-weight: 700;
  font-size: 15px;
  color: #0f172a;
  white-space: nowrap;
}
.sec-head .sum {
  color: var(--muted);
  font-size: 12.5px;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sec-head .arrow {
  color: #94a3b8;
  transition: transform .2s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 12px;
}
.sec.open .arrow { transform: rotate(90deg); color: var(--primary); }
.sec-body {
  padding: 8px 20px 20px;
  border-top: 1px solid var(--line);
  background: #fff;
}

/* ===== 浮动搜索下拉 ===== */
.picker-list {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.15);
  max-height: 280px;
  overflow-y: auto;
}
.picker-item {
  padding: 9px 12px;
  cursor: pointer;
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-bottom: 1px solid #f8fafc;
}
.picker-item:hover { background: #eff6ff; color: var(--primary); }

/* ===== 打印样式 ===== */
.print-sheet { max-width: 820px; }
.printable { background: #fff; color: #000; font-family: -apple-system, "SimSun", "Songti SC", "PingFang SC", sans-serif; padding: 12px; }
.print-header { text-align: center; border-bottom: 2px solid #000; padding-bottom: 8px; margin-bottom: 12px; position: relative; }
.print-header h2 { font-size: 20px; letter-spacing: 2px; color: #000; margin: 0; text-align: center; }
.print-no { position: absolute; right: 0; bottom: 8px; font-family: monospace; font-size: 13px; font-weight: 700; }
.print-meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 6px 16px; font-size: 13px; margin-bottom: 12px; padding: 6px 0; border-bottom: 1px dashed #cbd5e1; }
.print-table { width: 100%; border-collapse: collapse; margin-bottom: 12px; border-top: 2px solid #000; border-bottom: 2px solid #000; }
.print-table th, .print-table td { border: 1px solid #000; padding: 6px 8px; font-size: 12px; color: #000; }
.print-table th { background: #f1f5f9; font-weight: 700; text-align: left; }
.print-table .text-right { text-align: right; }
.print-totals { display: flex; justify-content: flex-end; gap: 20px; padding: 8px 0; font-size: 13px; border-bottom: 1px dashed #cbd5e1; }
.print-footer { display: flex; justify-content: space-between; align-items: flex-end; margin-top: 18px; font-size: 12px; padding-top: 8px; }
.sign-block { font-size: 13px; }
.print-note { color: #64748b; font-size: 11px; }

@media print {
  html, body {
    margin: 0 !important;
    padding: 0 !important;
    height: auto !important;
    min-height: 0 !important;
    background: #fff !important;
    overflow: visible !important;
  }
  body > * { display: none !important; }
  #app { display: block !important; }
  #app > * { display: none !important; }
  #app > .modal-mask.print-modal-mask {
    display: block !important;
    position: static !important;
    inset: auto !important;
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    overflow: visible !important;
  }
  .modal-mask.print-modal-mask * { visibility: visible !important; }
  .print-sheet {
    box-shadow: none !important;
    border-radius: 0 !important;
    max-width: 100% !important;
    width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  .no-print { display: none !important; }
  .printable { padding: 0 !important; width: 100% !important; }
  .print-table th { background: #eee !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}

/* ===== 系统设置双列响应式布局 ===== */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 20px;
  align-items: start;
}
.settings-col {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.settings-col .card {
  margin-bottom: 20px;
}

/* ===== 移动端响应式 ===== */
@media (max-width: 768px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; flex-direction: column; }
  .nav { display: flex; overflow-x: auto; padding: 8px; }
  .nav a { white-space: nowrap; margin-bottom: 0; font-size: 13px; padding: 8px 12px; }
  .side-foot { display: none; }
  .main { padding: 16px; }
  .grid-cards { grid-template-columns: 1fr 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
}