* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "Microsoft YaHei", "PingFang SC", sans-serif; background: #f3f5f9; color: #222; }
.hidden { display: none !important; }

/* 登录 */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #1e3a8a, #2563eb); }
.auth-card { background: #fff; border-radius: 12px; padding: 36px 40px; width: 380px; box-shadow: 0 12px 40px rgba(0,0,0,.25); }
.auth-card h1 { text-align: center; color: #1e3a8a; }
.auth-card .sub { text-align: center; color: #888; margin: 6px 0 20px; font-size: 14px; }
.tabs { display: flex; margin-bottom: 18px; border-bottom: 2px solid #eee; }
.tab { flex: 1; padding: 10px; background: none; border: none; font-size: 16px; cursor: pointer; color: #888; }
.tab.active { color: #1e3a8a; border-bottom: 2px solid #1e3a8a; margin-bottom: -2px; font-weight: bold; }
input, select { width: 100%; padding: 10px 12px; margin: 6px 0; border: 1px solid #d4d9e2; border-radius: 6px; font-size: 14px; }
input:focus, select:focus { outline: none; border-color: #2563eb; }
.tip { font-size: 12px; color: #999; margin-top: 8px; text-align: center; }
.msg { color: #d4380d; font-size: 13px; margin-top: 10px; min-height: 18px; }

/* 按钮 */
.btn { padding: 9px 18px; border: 1px solid #d4d9e2; background: #fff; border-radius: 6px; cursor: pointer; font-size: 14px; }
.btn:hover { border-color: #2563eb; color: #2563eb; }
.btn.primary { background: #2563eb; color: #fff; border-color: #2563eb; }
.btn.primary:hover { background: #1d4ed8; }
.btn.block { width: 100%; margin-top: 10px; }
.btn.big { padding: 13px; font-size: 16px; font-weight: bold; }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn.danger { color: #d4380d; }
.btn.danger:hover { border-color: #d4380d; }

/* 顶栏 */
.topbar { display: flex; align-items: center; background: #1e3a8a; color: #fff; padding: 0 24px; height: 56px; }
.topbar .brand { font-size: 18px; font-weight: bold; margin-right: 40px; }
.topbar nav { flex: 1; display: flex; gap: 8px; }
.navbtn { background: none; border: none; color: #c7d2fe; font-size: 15px; padding: 16px 14px; cursor: pointer; }
.navbtn.active, .navbtn:hover { color: #fff; border-bottom: 2px solid #fff; }
.userbox { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.userbox .btn { background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }

/* 主区 */
.page { padding: 20px 24px; max-width: 1400px; margin: 0 auto; }
.layout { display: grid; grid-template-columns: 400px 1fr; gap: 20px; align-items: start; }
.panel { background: #fff; border-radius: 10px; padding: 22px 24px; box-shadow: 0 2px 8px rgba(30,58,138,.06); }
.panel h2 { font-size: 17px; color: #1e3a8a; margin-bottom: 16px; border-left: 4px solid #2563eb; padding-left: 10px; }
.field { margin-bottom: 12px; }
.field label { display: block; font-size: 13px; color: #555; margin-bottom: 2px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.adv { margin: 10px 0; font-size: 13px; color: #666; }
.adv summary { cursor: pointer; padding: 6px 0; }

/* 型号列表 */
.model-list { max-height: 260px; overflow-y: auto; border: 1px solid #e5e9f2; border-radius: 6px; margin-top: 4px; }
.model-list:empty { display: none; }
.model-item { padding: 8px 12px; cursor: pointer; border-bottom: 1px solid #f0f2f8; font-size: 13px; }
.model-item:hover { background: #eff6ff; }
.model-item .dim { color: #999; margin-left: 6px; font-size: 12px; }
.model-item i { color: #d4380d; font-style: normal; }
.tag { font-size: 11px; background: #e0f2e9; color: #15803d; border-radius: 3px; padding: 1px 5px; margin-left: 6px; }
.tag.out { background: #fdeeda; color: #c2410c; }
.chosen { font-size: 13px; color: #1e3a8a; background: #eff6ff; padding: 8px 10px; border-radius: 6px; margin-top: 6px; }

/* 结果 */
.empty { color: #aaa; text-align: center; padding: 60px 0; }
.empty.small { padding: 14px; }
.design-box { background: #f8fafc; border: 1px solid #e5e9f2; border-radius: 8px; padding: 14px 16px; margin-bottom: 16px; font-size: 13.5px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 24px; }
.qtable { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.qtable th { background: #1e3a8a; color: #fff; padding: 9px 10px; text-align: left; font-weight: normal; }
.qtable td { padding: 8px 10px; border-bottom: 1px solid #eef1f7; }
.qtable .num { text-align: right; font-variant-numeric: tabular-nums; }
.qtable .params { font-size: 11.5px; color: #555; max-width: 320px; line-height: 1.5; }
.qtable tfoot .total { color: #d4380d; font-size: 17px; font-weight: bold; }
.warn { color: #c2410c; background: #fff7ed; border: 1px solid #fed7aa; border-radius: 6px; padding: 8px 12px; margin-top: 10px; font-size: 13px; }
.spec-box { margin-top: 12px; padding-top: 10px; border-top: 1px dashed #d4d9e2; font-size: 12.5px; color: #555; line-height: 1.7; }
.internal { color: #1e3a8a; background: #eff6ff; border: 1px dashed #93c5fd; border-radius: 6px; padding: 8px 12px; margin-top: 10px; font-size: 13px; }
.req { color: #d4380d; font-size: 11px; font-style: normal; }
.addon-item { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border: 1px solid #e5e9f2; border-radius: 6px; margin: 4px 0; font-size: 13px; }
.addon-item .cost { color: #999; font-size: 12px; }
.addon-item input[type=number] { width: 110px; margin: 0 0 0 auto; padding: 6px 8px; }
.actions { margin-top: 16px; display: flex; gap: 10px; }

@media (max-width: 1000px) { .layout { grid-template-columns: 1fr; } }

@media print {
  body > *:not(#printArea) { display: none !important; }
  #printArea { display: block !important; position: static !important; }
  .print-doc { padding: 10px; font-size: 13px; }
  .print-doc h1 { font-size: 20px; text-align: center; margin-bottom: 12px; }
  .print-doc p { margin: 4px 0; }
  .print-doc table { margin-top: 10px; page-break-inside: auto; }
  .print-doc tr { page-break-inside: avoid; }
}