/* ===========================================================
   房屋出租水电费管理系统 · 原型样式
   =========================================================== */
:root{
  --brand:#2563eb;
  --brand-dark:#1d4ed8;
  --ink:#0f172a;
  --sub:#64748b;
  --line:#e2e8f0;
  --bg:#f5f7fb;
  --card:#ffffff;
  --ok:#16a34a;
  --warn:#f59e0b;
  --danger:#dc2626;
  --radius:14px;
  --shadow:0 1px 2px rgba(15,23,42,.04),0 8px 24px rgba(15,23,42,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--ink);font-size:14px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0;font-weight:600}
.mono{font-family:"SFMono-Regular",Menlo,Consolas,"Courier New",monospace}

/* ---------- 通用容器 ---------- */
.wrap{max-width:1180px;margin:0 auto;padding:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.pad{padding:20px 22px}
.row{display:flex;gap:14px;flex-wrap:wrap}
.row.tight{gap:8px}
.between{display:flex;align-items:center;justify-content:space-between;gap:12px}
.muted{color:var(--sub)}
.tiny{font-size:12px}
.center{text-align:center}
.mt8{margin-top:8px}.mt16{margin-top:16px}.mt24{margin-top:24px}
.mb8{margin-bottom:8px}.mb16{margin-bottom:16px}
.hide{display:none !important}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:1px solid var(--line);background:#fff;color:var(--ink);
  padding:8px 14px;border-radius:10px;cursor:pointer;font-size:13px;font-weight:500;
  transition:.15s;
}
.btn:hover{border-color:#cbd5e1;background:#f8fafc}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-dark)}
.btn.ghost{background:transparent}
.btn.danger{color:var(--danger);border-color:#fecaca;background:#fff5f5}
.btn.sm{padding:5px 10px;font-size:12px;border-radius:8px}
.btn.block{width:100%}
.btn:active{transform:translateY(1px)}

/* ---------- 表单 ---------- */
label.f{display:block;font-size:12px;color:var(--sub);margin-bottom:6px}
input,select,textarea{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:10px;
  font-size:14px;background:#fff;color:var(--ink);outline:none;font-family:inherit;
}
input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.field{margin-bottom:14px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:0 14px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:0 14px}

/* ---------- 表格 ---------- */
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
th{background:#f8fafc;color:var(--sub);font-weight:600;font-size:12px;letter-spacing:.3px}
tbody tr:hover{background:#fafcff}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
td .btn{padding:3px 8px;font-size:12px}
.table-wrap{overflow-x:auto}

/* ---------- 标签 ---------- */
.tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;border:1px solid transparent}
.tag.ok{background:#ecfdf5;color:#15803d;border-color:#a7f3d0}
.tag.warn{background:#fffbeb;color:#b45309;border-color:#fde68a}
.tag.danger{background:#fef2f2;color:#b91c1c;border-color:#fecaca}
.tag.info{background:#eff6ff;color:#1d4ed8;border-color:#bfdbfe}
.tag.gray{background:#f1f5f9;color:#475569;border-color:#e2e8f0}

/* ---------- 首页 ---------- */
.hero{padding:56px 0 32px;text-align:center}
.hero h1{font-size:32px;letter-spacing:-.5px}
.hero p{color:var(--sub);max-width:640px;margin:12px auto 0}
.entry-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:28px}
.entry{padding:24px;text-align:left;cursor:pointer;transition:.18s;border:1px solid var(--line);background:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
.entry:hover{transform:translateY(-2px);border-color:var(--brand);box-shadow:0 12px 30px rgba(37,99,235,.12)}
.entry h3{font-size:18px}
.entry .ico{width:44px;height:44px;border-radius:12px;background:#eff6ff;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:12px}
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:28px}
.feat div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.feat b{display:block;margin-bottom:4px}
.topbar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.topbar .wrap{padding:12px 24px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:16px}
.logo .dot{width:10px;height:10px;border-radius:3px;background:var(--brand)}

/* ---------- 后台布局 ---------- */
.admin{display:grid;grid-template-columns:212px 1fr;min-height:100vh}
.side{background:#0f172a;color:#cbd5e1;padding:18px 12px;position:sticky;top:0;height:100vh;overflow:auto}
.side .brand{color:#fff;font-weight:700;padding:6px 10px 16px;font-size:15px}
.side a{display:flex;gap:9px;align-items:center;color:#cbd5e1;padding:9px 11px;border-radius:9px;font-size:13.5px;margin-bottom:2px}
.side a:hover{background:#1e293b;color:#fff;text-decoration:none}
.side a.on{background:var(--brand);color:#fff}
.side .grp{font-size:11px;color:#64748b;padding:14px 11px 6px;letter-spacing:1px}
.main{padding:22px 26px 60px;background:var(--bg);min-width:0}
.page-h{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:18px}
.page-h h2{font-size:20px}
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.kpi{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}
.kpi .lab{font-size:12px;color:var(--sub)}
.kpi .val{font-size:24px;font-weight:700;margin-top:4px;font-variant-numeric:tabular-nums}
.kpi .delta{font-size:12px;color:var(--sub)}
.tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin-bottom:16px;flex-wrap:wrap}
.tab{padding:8px 14px;cursor:pointer;border-bottom:2px solid transparent;color:var(--sub);font-size:13.5px}
.tab.on{color:var(--brand);border-color:var(--brand);font-weight:600}

/* ---------- 弹窗 ---------- */
.mask{position:fixed;inset:0;background:rgba(15,23,42,.45);display:flex;align-items:center;justify-content:center;z-index:80;padding:20px}
.modal{background:#fff;border-radius:16px;width:100%;max-width:560px;max-height:88vh;overflow:auto;box-shadow:0 24px 60px rgba(0,0,0,.25)}
.modal header{padding:16px 20px;border-bottom:1px solid var(--line);font-weight:600;display:flex;justify-content:space-between;align-items:center}
.modal .body{padding:20px}
.modal footer{padding:14px 20px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:8px;background:#fafbfd;border-radius:0 0 16px 16px}
.x{cursor:pointer;color:var(--sub);font-size:20px;line-height:1}

/* ---------- 租客端（手机壳） ---------- */
.phone-shell{max-width:430px;margin:0 auto;background:#eef2f8;border:10px solid #111827;border-radius:38px;padding:0;overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.phone-top{background:#fff;padding:14px 18px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}
.phone-body{background:var(--bg);padding:14px;min-height:620px}
.m-card{background:#fff;border-radius:14px;border:1px solid var(--line);padding:14px 16px;margin-bottom:12px;box-shadow:0 2px 10px rgba(15,23,42,.04)}
.m-card h4{font-size:15px;margin-bottom:8px}
.bill-line{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px dashed var(--line);font-size:13.5px}
.bill-line:last-child{border:0}
.bill-line .k{color:var(--sub)}
.bill-line .v{font-variant-numeric:tabular-nums}
.total-row{display:flex;justify-content:space-between;align-items:baseline;padding:10px 0 0;font-weight:700}
.total-row .amt{font-size:26px;color:var(--danger);font-variant-numeric:tabular-nums}
.meter{display:flex;align-items:center;gap:8px;font-variant-numeric:tabular-nums;font-size:13px}
.meter .rd{background:#f1f5f9;border-radius:6px;padding:2px 7px}
.meter .op{color:var(--brand)}
.hist{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-bottom:1px solid var(--line)}
.hist:last-child{border:0}
.hist .l b{display:block;font-size:14px}
.hist .r{text-align:right}
.hist .r .m{font-weight:600;font-variant-numeric:tabular-nums}

/* ---------- 水印层 ---------- */
#wm-layer{position:fixed;inset:0;pointer-events:none;z-index:9999}
.wm-tip{position:fixed;right:14px;bottom:14px;z-index:10000;background:rgba(15,23,42,.9);color:#fff;font-size:12px;padding:8px 12px;border-radius:10px;display:flex;gap:10px;align-items:center}
.wm-tip button{background:rgba(255,255,255,.16);border:0;color:#fff;border-radius:6px;padding:3px 8px;cursor:pointer;font-size:12px}
.wm-badge{position:fixed;left:14px;bottom:14px;z-index:10000;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 12px;font-size:12px;box-shadow:var(--shadow);font-variant-numeric:tabular-nums}

/* ---------- 页面内反馈：替代 alert / confirm ---------- */
.app-feedback{position:fixed;right:18px;top:18px;z-index:10020;display:flex;flex-direction:column;gap:8px;max-width:min(420px,calc(100vw - 36px));pointer-events:none}
.app-notice{background:#0f172a;color:#fff;border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:11px 14px;box-shadow:0 14px 36px rgba(15,23,42,.22);font-size:13px;line-height:1.5;animation:appNoticeIn .18s ease-out}
.app-notice.success{background:#166534}.app-notice.warn{background:#92400e}.app-notice.error{background:#991b1b}
.app-notice.leaving{opacity:0;transform:translateY(-5px);transition:.18s}
.app-confirm-root{position:fixed;inset:0;z-index:10030}
.app-confirm-mask{position:absolute;inset:0;background:rgba(15,23,42,.42);display:flex;align-items:center;justify-content:center;padding:20px}
.app-confirm{width:min(420px,100%);background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 24px 60px rgba(15,23,42,.25);padding:20px}
.app-confirm-text{font-size:14px;line-height:1.7;color:var(--ink);white-space:pre-line}
.app-confirm-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:18px}
@keyframes appNoticeIn{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}

/* ===========================================================
   电子票据（高仿真）
   =========================================================== */
.receipt-stage{padding:26px 0 60px;display:flex;flex-direction:column;align-items:center;gap:14px}
.paper{
  width:794px; /* A4 @96dpi */
  background:#fffdf8;
  border:1px solid #dcd3c4;
  box-shadow:0 10px 40px rgba(15,23,42,.18);
  padding:34px 40px 26px;
  position:relative;
  color:#1a1a1a;
  background-image:
    repeating-linear-gradient(0deg, rgba(0,0,0,.012) 0 2px, transparent 2px 4px);
}
.paper .rc-head{display:flex;justify-content:space-between;align-items:flex-start;border-bottom:2px solid #8f1d1d;padding-bottom:10px}
.paper .rc-org{font-size:13px;color:#444;letter-spacing:1px}
.paper .rc-title{font-size:27px;font-weight:700;color:#8f1d1d;letter-spacing:6px;text-align:center;flex:1}
.paper .rc-no{font-size:12.5px;color:#444;text-align:right;line-height:1.7}
.paper .rc-meta{display:grid;grid-template-columns:1fr 1fr;gap:4px 26px;font-size:13.5px;margin:14px 0 10px}
.paper .rc-meta div{display:flex;gap:6px}
.paper .rc-meta span:first-child{color:#666;min-width:64px}
.rc-table{width:100%;border-collapse:collapse;font-size:13px;margin-top:6px}
.rc-table th,.rc-table td{border:1px solid #b9b0a2;padding:7px 9px;text-align:center;white-space:nowrap}
.rc-table th{background:#f4efe6;color:#3b3b3b;font-weight:600}
.rc-table td.l{text-align:left}
.rc-table td.r,.rc-table th.r{text-align:right;font-variant-numeric:tabular-nums}
.rc-table tfoot td{background:#faf6ee;font-weight:600}
.rc-sum{display:flex;justify-content:space-between;margin-top:12px;font-size:14px}
.rc-sum .big{font-size:15px;font-weight:700;color:#8f1d1d}
.rc-capital{margin-top:8px;border:1px solid #b9b0a2;padding:8px 12px;font-size:14px;letter-spacing:1px;background:#faf6ee}
.rc-capital b{color:#8f1d1d}
.rc-foot{display:flex;justify-content:space-between;align-items:flex-end;margin-top:18px;gap:20px}
.rc-foot .sig{flex:1;font-size:13px;line-height:2}
.rc-qr{text-align:center;width:132px}
.rc-qr .code{font-size:11px;color:#666;margin-top:4px;line-height:1.5}
.rc-verify{margin-top:14px;border-top:1px dashed #b9b0a2;padding-top:10px;font-size:12px;color:#555;display:flex;justify-content:space-between}
.cut{margin:22px 0 6px;border-top:1px dashed #b9b0a2;position:relative;height:0}
.cut::after{content:"沿此线撕开 · 存根联 / 客户联";position:absolute;left:50%;top:-9px;transform:translateX(-50%);background:#fffdf8;padding:0 10px;font-size:11px;color:#999}
.stub{opacity:.85;font-size:12.5px}
.stub table{font-size:12px}
/* 红色印章 */
.stamp{
  position:absolute;right:56px;bottom:112px;width:158px;height:158px;
  display:block;transform:rotate(-8deg);opacity:.84;pointer-events:none;
}
.stamp img{display:block;width:100%;height:100%;object-fit:contain;user-select:none;-webkit-user-drag:none}
/* 已盖章 / 作废 */
.stamp.paid{filter:none}
.stamp.void{filter:grayscale(1);opacity:.28}
.toolbar{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.toolbar .btn{min-width:110px}

/* ---------- 打印 ---------- */
@media print{
  body{background:#fff}
  .topbar,.toolbar,.wm-tip,.wm-badge,.app-feedback,.app-confirm-root,.no-print,#wm-layer{display:none !important}
  .paper{box-shadow:none;border:0;width:100%;margin:0;padding:12mm 14mm;background:#fff;background-image:none}
  .receipt-stage{padding:0}
  @page{size:A4;margin:0}
}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .entry-grid,.feat,.kpis,.grid4{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .admin{grid-template-columns:1fr}
  .side{position:static;height:auto;display:flex;gap:6px;overflow-x:auto}
  .side .brand,.side .grp{display:none}
  .paper{width:100%;padding:18px}
  .stamp{right:16px;width:120px;height:120px}
}