:root{
  --primary:#667eea;
  --primary2:#764ba2;
  --success:#27ae60;
  --danger:#e74c3c;
  --muted:#666;
  --bg1:#667eea;
  --bg2:#764ba2;
  --card:#fff;
}
*{margin:0;padding:0;box-sizing:border-box}
body{
  font-family:'Microsoft YaHei', Arial, sans-serif;
  background: linear-gradient(135deg, var(--bg1) 0%, var(--bg2) 100%);
  min-height:100vh;
}
a{color:inherit}
.navbar{
  background: rgba(255,255,255,.95);
  padding:1rem 2rem;
  box-shadow:0 2px 10px rgba(0,0,0,.1);
}
.navbar-content{
  max-width:1200px;margin:0 auto;
  display:flex;justify-content:space-between;align-items:center;gap:1rem;
}
.navbar h1{color:var(--primary);font-size:1.5rem;white-space:nowrap}
.nav-links{display:flex;flex-wrap:wrap;gap:.25rem .75rem;align-items:center}
.nav-links a{
  color:#333;text-decoration:none;
  padding:.5rem 1rem;border-radius:5px;transition:all .2s;
}
.nav-links a:hover{background:var(--primary);color:#fff}
.container{max-width:1200px;margin:2rem auto;padding:0 1rem}
.alert{padding:1rem;margin-bottom:1rem;border-radius:5px;animation:slideIn .2s ease}
@keyframes slideIn{from{transform:translateY(-10px);opacity:0}to{transform:translateY(0);opacity:1}}
.alert-success{background:#d4edda;color:#155724;border:1px solid #c3e6cb}
.alert-error{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}
.alert-warning{background:#fff3cd;color:#856404;border:1px solid #ffeaa7}
.alert-info{background:#d1ecf1;color:#0c5460;border:1px solid #bee5eb}
.card{
  background:var(--card);
  border-radius:10px;
  padding:2rem;
  box-shadow:0 5px 20px rgba(0,0,0,.1);
  margin-bottom:2rem;
}
.btn{
  padding:.75rem 1.5rem;border:none;border-radius:5px;
  cursor:pointer;font-size:1rem;transition:all .2s;
  text-decoration:none;display:inline-block;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:#5568d3;transform:translateY(-1px);box-shadow:0 5px 15px rgba(102,126,234,.25)}
.btn-success{background:var(--success);color:#fff}
.btn-success:hover{background:#229954;transform:translateY(-1px)}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#c0392b}
.btn-muted{background:#95a5a6;color:#fff}
.btn-muted:hover{background:#7f8c8d}
table{width:100%;border-collapse:collapse;margin-top:1rem}
th{background:var(--primary);color:#fff;padding:1rem;text-align:left}
td{padding:.75rem 1rem;border-bottom:1px solid #eee}
tr:hover{background:#f8f9fa}
.form-group{margin-bottom:1.5rem}
label{display:block;margin-bottom:.5rem;color:#333;font-weight:500}
input,select,textarea{
  width:100%;padding:.75rem;border:1px solid #ddd;border-radius:5px;font-size:1rem
}
input:focus,select:focus,textarea:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(102,126,234,.12)
}
.small{font-size:.9rem;color:var(--muted)}
.auth-container{max-width:420px;margin:5rem auto}
.auth-card{
  background:#fff;border-radius:15px;padding:3rem;
  box-shadow:0 10px 40px rgba(0,0,0,.15)
}
.auth-title{text-align:center;color:var(--primary);margin-bottom:2rem;font-size:2rem}
.auth-link{text-align:center;margin-top:1.5rem}
.auth-link a{color:var(--primary);text-decoration:none}
.auth-link a:hover{text-decoration:underline}
.no-data{text-align:center;color:#999;padding:3rem}
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap;gap:1rem}
.toolbar h2{color:var(--primary)}
.toolbar-actions{display:flex;gap:1rem;flex-wrap:wrap;align-items:center}
.file-upload{position:relative;display:inline-block}
.file-upload input[type="file"]{position:absolute;opacity:0;width:0;height:0}
.file-upload-label{padding:.75rem 1.5rem;background:var(--success);color:#fff;border-radius:5px;cursor:pointer;transition:all .2s;display:inline-block}
.file-upload-label:hover{background:#229954;transform:translateY(-1px)}
.action-btn{padding:.5rem 1rem;font-size:.875rem}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-bottom:2rem}
.stat-card{
  color:#fff;padding:2rem;border-radius:10px;box-shadow:0 5px 20px rgba(0,0,0,.1);
  transition:transform .2s
}
.stat-card:hover{transform:translateY(-3px)}
.stat-card.income{background:linear-gradient(135deg,#11998e 0%,#38ef7d 100%)}
.stat-card.cost{background:linear-gradient(135deg,#eb3349 0%,#f45c43 100%)}
.stat-card.profit{background:linear-gradient(135deg,#4facfe 0%,#00f2fe 100%)}
.stat-label{font-size:.9rem;opacity:.9;margin-bottom:.5rem}
.stat-value{font-size:2rem;font-weight:bold}
.chart-container{
  background:#fff;border-radius:10px;padding:2rem;margin-bottom:2rem;box-shadow:0 5px 20px rgba(0,0,0,.1)
}
.chart-title{color:var(--primary);margin-bottom:1.5rem;font-size:1.3rem}
canvas{max-height:400px}
.footer-note{color:#fff;opacity:.9;text-align:center;margin:2rem 0}