:root {
  --primary: #0f766e;
  --primary-dark: #115e59;
  --primary-soft: #e6f4f2;
  --accent: #c08f22;
  --bg: #f5f7f9;
  --panel: #ffffff;
  --text: #1f2937;
  --text-sub: #6b7280;
  --border: #e5e7eb;
  --danger: #dc2626;
  --radius: 10px;
  --radius-lg: 14px;
}

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

/* ===== 通用 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 9px 16px; border: 1px solid var(--border); border-radius: 8px;
  background: #fff; color: var(--text); font-size: 14px; cursor: pointer;
  transition: all .15s; white-space: nowrap;
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.ghost { background: transparent; }
.btn.small { padding: 5px 10px; font-size: 13px; }
.btn.block, .btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 13px; color: var(--text-sub); }
.field input, .field select {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; color: var(--text); background: #fff; outline: none;
}
.field input:focus, .field select:focus { border-color: var(--primary); }
.req { color: var(--danger); }

/* ===== 登录 ===== */
.login-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #0f766e 0%, #115e59 100%);
  padding: 20px;
}
.login-card {
  width: 100%; max-width: 380px; background: #fff; border-radius: var(--radius-lg);
  padding: 32px 28px; box-shadow: 0 20px 50px rgba(0,0,0,.25);
}
.login-title { font-size: 22px; font-weight: 600; text-align: center; }
.login-sub { text-align: center; color: var(--text-sub); font-size: 13px; margin: 6px 0 20px; }
.tabs { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; margin-bottom: 18px; }
.tab { flex: 1; padding: 9px; border: none; background: #fff; cursor: pointer; font-size: 14px; color: var(--text-sub); }
.tab.active { background: var(--primary); color: #fff; }
.login-card form .field { margin-bottom: 14px; }
.login-err { color: var(--danger); font-size: 13px; text-align: center; min-height: 20px; margin-top: 10px; }

/* ===== 顶栏 ===== */
.topbar {
  display: flex; align-items: center; gap: 20px; padding: 0 24px; height: 58px;
  background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-size: 16px; font-weight: 600; color: var(--primary); }
.brand-sub { font-size: 12px; color: var(--text-sub); }
.nav { display: flex; gap: 6px; margin-left: 16px; }
.nav-btn { padding: 7px 16px; border: none; background: transparent; border-radius: 8px; cursor: pointer; font-size: 14px; color: var(--text-sub); }
.nav-btn.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.user-box { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.user-name { font-size: 14px; color: var(--text); }

/* ===== 视图 ===== */
.view { padding: 20px 24px; max-width: 1280px; margin: 0 auto; }
.view-notice {
  background: #fef3c7; border: 1px solid #f59e0b; color: #92400e;
  padding: 10px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px; }
.panel-title { font-size: 16px; font-weight: 600; margin-bottom: 16px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }

/* ===== 开单布局 ===== */
.order-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
@media (max-width: 980px) { .order-layout { grid-template-columns: 1fr; } }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 6px; }
.form-grid .field-full { grid-column: 1 / -1; }
.seg { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg-btn { flex: 1; padding: 8px; border: none; background: #fff; cursor: pointer; font-size: 13px; color: var(--text-sub); }
.seg-btn.active { background: var(--primary); color: #fff; }

/* 明细表 */
.items-table-wrap { overflow-x: auto; }
.items-table { width: 100%; border-collapse: collapse; margin-bottom: 10px; }
.items-table th, .items-table td { border: 1px solid var(--border); padding: 6px; text-align: center; }
.items-table th { background: #f9fafb; font-size: 12px; color: var(--text-sub); font-weight: 500; }
.items-table input {
  width: 100%; border: none; outline: none; font-size: 13px; text-align: center;
  background: transparent; color: var(--text);
}
.items-table input:focus { background: #f0fdfa; }
.row-no { color: var(--text-sub); font-size: 13px; }
.row-del { border: none; background: transparent; color: var(--danger); cursor: pointer; font-size: 16px; }
.it-sale, .it-amount { font-size: 13px; white-space: nowrap; }
.it-amount { font-weight: 600; color: var(--primary); }
.add-row { margin-top: 4px; }

/* 合计 */
.total-bar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; padding: 14px 0 4px; }
.total-amount { font-size: 15px; }
.total-amount b { color: var(--accent); font-size: 20px; }
.total-cap { font-size: 13px; color: var(--text-sub); }

.actions { display: flex; gap: 10px; margin-top: 16px; }

/* ===== 单据预览 / 打印 ===== */
.preview-panel { position: sticky; top: 76px; }
#previewWrap { display: flex; justify-content: center; }
#printArea { background: #fff; width: 100%; }

.doc {
  font-family: "SimSun", "Songti SC", "STSong", serif;
  color: #000; font-size: 13px; padding: 22px 24px;
  border: 1px solid #ddd; min-height: 500px;
}
.doc-head { display: flex; align-items: baseline; justify-content: space-between; border-bottom: 2px solid #000; padding-bottom: 8px; }
.doc-company { font-size: 20px; font-weight: 700; }
.doc-title { font-size: 18px; font-weight: 700; }
.doc-flag { display: inline-block; margin-left: 6px; font-size: 12px; color: #c00; border: 1px solid #c00; border-radius: 3px; padding: 0 4px; vertical-align: middle; }
.doc-meta { display: flex; flex-wrap: wrap; gap: 18px; padding: 10px 0; font-size: 13px; }
.doc-meta b { font-weight: 400; }
.doc-table { width: 100%; border-collapse: collapse; margin: 6px 0; }
.doc-table th, .doc-table td { border: 1px solid #000; padding: 6px 4px; text-align: center; font-size: 12px; }
.doc-table th { background: #f5f5f5; font-weight: 700; }
.doc-total { display: flex; justify-content: space-between; padding: 10px 0; font-size: 14px; }
.doc-total .cap { font-size: 13px; }
.doc-logistics { border-top: 1px dashed #000; padding: 8px 0; font-size: 12px; min-height: 24px; }
.doc-sign { display: flex; justify-content: space-between; padding-top: 18px; font-size: 12px; flex-wrap: wrap; gap: 8px; }

/* ===== 历史记录 ===== */
.history-toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.history-toolbar input[type="text"], .history-toolbar input[type="date"] {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; outline: none;
}
.history-toolbar input[type="text"] { flex: 1; min-width: 180px; max-width: 320px; }
.tilde { color: var(--text-sub); }
.spacer { flex: 1; }
.history-table-wrap { overflow-x: auto; }
.history-table { width: 100%; border-collapse: collapse; }
.history-table th, .history-table td { border-bottom: 1px solid var(--border); padding: 10px 8px; text-align: left; font-size: 13px; white-space: nowrap; }
.history-table th { background: #f9fafb; color: var(--text-sub); font-weight: 500; }
.history-table tr:hover td { background: #fafafa; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; }
.tag.normal { background: var(--primary-soft); color: var(--primary); }
.tag.discount { background: #fdf3e0; color: var(--accent); }
.row-actions { display: flex; gap: 6px; }
.link-btn { border: none; background: transparent; color: var(--primary); cursor: pointer; font-size: 13px; padding: 0; }
.link-btn.danger { color: var(--danger); }
.link-btn:disabled { color: #cbd5e1; cursor: not-allowed; }
.pagination { display: flex; align-items: center; justify-content: flex-end; gap: 10px; margin-top: 16px; color: var(--text-sub); font-size: 13px; }
.empty { text-align: center; color: var(--text-sub); padding: 40px 0; }

/* ===== 打印 ===== */
@media print {
  body { background: #fff; }
  .topbar, .nav, .user-box, .form-panel, .history-panel, .view-notice, .preview-panel .panel-title, .actions, .total-bar, .add-row, .items-table-wrap { display: none !important; }
  .view { padding: 0; max-width: none; }
  .order-layout { display: block; }
  .preview-panel { position: static; border: none; padding: 0; }
  #previewWrap { display: block; }
  #printArea { width: 100%; }
  .doc { border: none; padding: 0; }
}