/* ============================================
   安装管理系统 v4.0 — Professional Design System
   ============================================ */

/* ---- Reset & Base ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --c-bg:#f0f2f5;--c-white:#fff;--c-text:#1a1a2e;--c-muted:#6b7280;
  --c-primary:#4f46e5;--c-primary-hover:#4338ca;--c-primary-light:#eef2ff;
  --c-danger:#dc2626;--c-danger-light:#fef2f2;--c-success:#16a34a;--c-success-light:#f0fdf4;
  --c-warning:#d97706;--c-warning-light:#fffbeb;
  --c-sidebar:#111827;--c-sidebar-hover:#1f2937;--c-sidebar-active:#4f46e5;
  --c-border:#e5e7eb;--c-card-shadow:0 1px 2px rgba(0,0,0,.04),0 2px 8px rgba(0,0,0,.04);
  --radius:8px;--radius-sm:6px;
  --sidebar-w:260px;
  font-size:15px;
}
body{
  font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--c-bg);color:var(--c-text);line-height:1.5;
  -webkit-font-smoothing:antialiased;
}

/* ---- Layout ---- */
.layout{display:flex;min-height:100vh}
.layout-sidebar{
  width:var(--sidebar-w);background:var(--c-sidebar);color:#fff;
  position:fixed;top:0;left:0;bottom:0;z-index:100;
  display:flex;flex-direction:column;overflow-y:auto;
}
.layout-main{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column;min-height:100vh}

.sidebar-brand{
  display:flex;align-items:center;gap:12px;padding:0 20px;height:64px;
  border-bottom:1px solid rgba(255,255,255,.08);font-weight:700;font-size:17px;flex-shrink:0;
}
.sidebar-brand i{color:#818cf8;font-size:22px}

.sidebar-nav{flex:1;padding:12px 8px}
.sidebar-nav a{display:flex;align-items:center;gap:12px;padding:10px 12px;color:rgba(255,255,255,.65);
  text-decoration:none;border-radius:var(--radius-sm);font-size:14px;transition:all .15s;
  margin-bottom:1px;font-weight:450;
}
.sidebar-nav a:hover{color:#fff;background:var(--c-sidebar-hover)}
.sidebar-nav a.active{color:#fff;background:var(--c-sidebar-active);font-weight:550}
.sidebar-nav a i{width:20px;text-align:center;font-size:15px;opacity:.75}
.sidebar-nav a.active i{opacity:1}
.sidebar-nav .nav-section{margin-top:12px;padding:0 12px 6px;font-size:11px;text-transform:uppercase;
  letter-spacing:.05em;color:rgba(255,255,255,.3);font-weight:600}
.sidebar-nav .nav-sub{margin-left:28px;border-left:1px solid rgba(255,255,255,.1);padding-left:4px}
.sidebar-nav .nav-sub a{font-size:13px;padding:8px 12px}
.sidebar-user{padding:14px 16px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;flex-shrink:0}
.sidebar-user a{color:rgba(255,255,255,.5);text-decoration:none}
.sidebar-user a:hover{color:#fff}

/* Top bar */
.topbar{
  height:64px;background:var(--c-white);border-bottom:1px solid var(--c-border);
  display:flex;align-items:center;padding:0 24px;flex-shrink:0;
  position:sticky;top:0;z-index:50;
}
.topbar-title{font-size:18px;font-weight:650;flex:1}
.topbar-actions{display:flex;align-items:center;gap:16px;font-size:14px;color:var(--c-muted)}

/* Page content */
.page-content{padding:24px;flex:1}
.page-content>.container{max-width:1280px;margin:0 auto}

/* ---- Cards ---- */
.card{background:var(--c-white);border-radius:var(--radius);box-shadow:var(--c-card-shadow);
  border:1px solid var(--c-border);margin-bottom:20px}
.card-header{padding:16px 20px;border-bottom:1px solid var(--c-border);
  display:flex;align-items:center;justify-content:space-between;font-weight:600;font-size:15px}
.card-body{padding:20px}

/* ---- Stats Grid ---- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:16px}
@media(max-width:900px){.stat-grid{grid-template-columns:repeat(2,1fr)}}
.stat{background:var(--c-white);padding:16px 20px;border-radius:var(--radius);
  box-shadow:var(--c-card-shadow);border:1px solid var(--c-border)}
.stat-value{font-size:26px;font-weight:750;letter-spacing:-.02em;line-height:1.15}
.stat-label{font-size:12px;color:var(--c-muted);margin-bottom:2px;text-transform:uppercase;letter-spacing:.03em}
.stat-sub{font-size:11px;color:var(--c-muted);margin-top:0}
.stat-sub .up{color:var(--c-success)}.stat-sub .down{color:var(--c-danger)}

/* ---- Tables ---- */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
table th{padding:10px 16px;text-align:left;font-weight:600;font-size:12px;text-transform:uppercase;
  letter-spacing:.03em;color:var(--c-muted);background:#f9fafb;border-bottom:2px solid var(--c-border);
  white-space:nowrap}
table td{padding:12px 16px;border-bottom:1px solid var(--c-border);vertical-align:middle}
table tbody tr:hover td{background:#fafbfc}
table a{color:var(--c-primary);text-decoration:none;font-weight:500}
table a:hover{text-decoration:underline}

/* ---- Forms ---- */
.form-label{display:block;font-size:13px;font-weight:550;color:#374151;margin-bottom:5px}
.form-control,.form-select{width:100%;padding:9px 12px;border:1px solid var(--c-border);
  border-radius:var(--radius-sm);font-size:14px;font-family:inherit;background:var(--c-white);
  transition:border-color .15s,box-shadow .15s;color:var(--c-text)}
.form-control:focus,.form-select:focus{outline:none;border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(79,70,229,.1)}
.form-control-sm{padding:6px 10px;font-size:13px}
.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 18px;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:530;
  cursor:pointer;text-decoration:none;transition:all .15s;line-height:1.4;font-family:inherit}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-hover)}
.btn-danger{background:var(--c-danger);color:#fff}
.btn-danger:hover{background:#b91c1c}
.btn-outline{background:transparent;border:1px solid var(--c-border);color:var(--c-text)}
.btn-outline:hover{background:#f9fafb;border-color:#d1d5db}
.btn-sm{padding:5px 12px;font-size:13px;gap:4px}
.btn-xs{padding:3px 8px;font-size:12px;border-radius:4px}
.btn-icon{width:36px;height:36px;padding:0;border-radius:var(--radius-sm);background:transparent;
  border:1px solid var(--c-border);cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.btn-icon:hover{background:#f9fafb}

/* ---- Badges ---- */
.badge{display:inline-block;padding:2px 10px;border-radius:10px;font-size:12px;font-weight:550}
.badge-green{background:var(--c-success-light);color:var(--c-success)}
.badge-red{background:var(--c-danger-light);color:var(--c-danger)}
.badge-blue{background:var(--c-primary-light);color:var(--c-primary)}
.badge-orange{background:var(--c-warning-light);color:var(--c-warning)}

/* ---- Alerts ---- */
.alert{padding:12px 16px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:16px}
.alert-error{background:var(--c-danger-light);color:var(--c-danger)}
.alert-success{background:var(--c-success-light);color:var(--c-success)}

/* ---- Utilities ---- */
.mt-1{margin-top:8px}.mt-2{margin-top:12px}.mt-3{margin-top:16px}.mt-4{margin-top:24px}
.mb-1{margin-bottom:8px}.mb-2{margin-bottom:12px}.mb-3{margin-bottom:16px}.mb-4{margin-bottom:24px}
.me-1{margin-right:8px}.ms-auto{margin-left:auto}
.gap-1{gap:8px}.gap-2{gap:12px}.gap-3{gap:16px}
.flex{display:flex}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}
.justify-between{justify-content:space-between}
.text-muted{color:var(--c-muted)}.text-sm{font-size:13px}.text-xs{font-size:12px}
.fw-bold{font-weight:600}.text-end{text-align:right}.text-truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.w-full{width:100%}.text-center{text-align:center}.d-none{display:none}

/* ---- Mobile ---- */
@media(max-width:767px){
  .layout-sidebar{transform:translateX(-100%);transition:transform .2s}
  .layout-sidebar.open{transform:translateX(0)}
  .layout-sidebar-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:99;display:none}
  .layout-sidebar-backdrop.show{display:block}
  .layout-main{margin-left:0}
  .topbar{padding:0 12px;height:56px}
  .topbar-title{font-size:15px}
  .page-content{padding:14px}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .stat{padding:14px 16px}.stat-value{font-size:22px}
  .form-row{grid-template-columns:1fr}
  .sidebar-brand{height:56px}
}

/* ---- Desktop ---- */
@media(min-width:768px){
  .d-md-none{display:none!important}
  .d-md-flex{display:flex!important}
}

/* ---- Order form: product table ---- */
.product-table{margin-top:8px}
.product-table td{padding:8px 10px;font-size:13px}
.product-table input,.product-table select{padding:5px 8px;font-size:13px;min-width:0}
.product-row-actions{white-space:nowrap}
.product-total-row{background:#f9fafb;font-weight:600}
.product-total-row td{border-top:2px solid var(--c-border)}

/* ---- Modal ---- */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:200;
  display:flex;align-items:center;justify-content:center;padding:16px}
.modal-box{background:var(--c-white);border-radius:12px;width:100%;max-width:520px;
  max-height:85vh;overflow-y:auto;box-shadow:0 10px 40px rgba(0,0,0,.15)}
.modal-header{padding:16px 20px;border-bottom:1px solid var(--c-border);
  display:flex;align-items:center;justify-content:space-between;font-weight:650;font-size:16px}
.modal-body{padding:20px}
.modal-footer{padding:12px 20px;border-top:1px solid var(--c-border);
  display:flex;justify-content:flex-end;gap:10px}

/* ---- Toast ---- */
.toast-container{position:fixed;top:20px;left:50%;transform:translateX(-50%);z-index:9999;
  display:flex;flex-direction:column;gap:8px;pointer-events:none}
.toast{display:flex;align-items:center;gap:10px;padding:12px 20px;border-radius:10px;
  font-size:14px;font-weight:500;box-shadow:0 4px 20px rgba(0,0,0,.12);pointer-events:auto;
  animation:toastIn .25s ease;min-width:200px;max-width:480px}
.toast-success{background:#059669;color:#fff}
.toast-error{background:#dc2626;color:#fff}
.toast-warn{background:#d97706;color:#fff}
.toast-info{background:var(--c-primary);color:#fff}
.toast i{font-size:16px;flex-shrink:0}
@keyframes toastIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
@keyframes toastOut{from{opacity:1}to{opacity:0}}

/* ---- Confirm Dialog ---- */
.confirm-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:9998;
  display:flex;align-items:center;justify-content:center;padding:16px;
  animation:fadeIn .15s ease}
.confirm-box{background:#fff;border-radius:14px;width:100%;max-width:380px;
  box-shadow:0 8px 40px rgba(0,0,0,.18);overflow:hidden;
  animation:scaleIn .2s ease}
.confirm-body{padding:28px 24px 20px;text-align:center}
.confirm-icon{font-size:40px;margin-bottom:12px;display:block}
.confirm-title{font-size:17px;font-weight:650;margin-bottom:8px;color:var(--c-text)}
.confirm-msg{font-size:14px;color:var(--c-muted);line-height:1.5}
.confirm-actions{display:flex;border-top:1px solid var(--c-border)}
.confirm-actions button{flex:1;padding:14px;border:none;background:none;font-size:15px;
  font-weight:550;cursor:pointer;font-family:inherit;transition:background .15s}
.confirm-actions button:hover{background:#f9fafb}
.confirm-actions .btn-cancel{color:var(--c-muted);border-right:1px solid var(--c-border)}
.confirm-actions .btn-ok{color:var(--c-primary)}
.confirm-actions .btn-danger{color:var(--c-danger)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes scaleIn{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}