/* ========== 白色主题发卡网 ========== */
:root{
  --bg:#ffffff;
  --bg-soft:#f7f8fa;
  --bg-card:#ffffff;
  --border:#eceef1;
  --border-strong:#e2e5ea;
  --text:#1f2328;
  --text-soft:#5a6270;
  --text-mute:#8a93a0;
  --primary:#3b82f6;
  --primary-hover:#2563eb;
  --primary-soft:#eff6ff;
  --success:#10b981;
  --danger:#ef4444;
  --warn:#f59e0b;
  --shadow-sm:0 1px 2px rgba(16,24,40,.04);
  --shadow:0 4px 14px rgba(16,24,40,.06);
  --shadow-lg:0 12px 32px rgba(16,24,40,.08);
  --radius:10px;
  --radius-lg:14px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  font-size:14px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-hover)}
img{max-width:100%;display:block}

.container{max-width:1180px;margin:0 auto;padding:0 20px}
.main{min-height:calc(100vh - 160px);padding:32px 20px}

/* Header */
.site-header{
  background:#fff;
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(180%) blur(8px);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:18px;font-weight:700;color:var(--text);letter-spacing:.5px}
.nav a{margin-left:24px;color:var(--text-soft);font-weight:500}
.nav a:hover{color:var(--primary)}

/* Footer */
.site-footer{
  border-top:1px solid var(--border);
  background:var(--bg-soft);
  padding:24px 0;
  color:var(--text-mute);
  text-align:center;
  font-size:13px;
}

/* Hero */
.hero{
  background:linear-gradient(180deg,#f8fafc 0%,#ffffff 100%);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:48px 32px;
  text-align:center;
  margin-bottom:32px;
}
.hero h1{margin:0 0 12px;font-size:32px;font-weight:700;color:var(--text)}
.hero p{margin:0;color:var(--text-soft);font-size:15px}

/* Section title */
.section-title{
  display:flex;align-items:center;justify-content:space-between;
  margin:32px 0 16px;
}
.section-title h2{margin:0;font-size:18px;font-weight:600}
.section-title .hint{color:var(--text-mute);font-size:13px}

/* Product grid */
.product-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(240px,1fr));
  gap:18px;
}
.product-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  transition:all .2s ease;
  display:flex;flex-direction:column;
  box-shadow:var(--shadow-sm);
}
.product-card:hover{
  border-color:var(--primary);
  transform:translateY(-2px);
  box-shadow:var(--shadow);
}
.product-card .name{font-size:15px;font-weight:600;color:var(--text);margin:0 0 8px}
.product-card .desc{color:var(--text-mute);font-size:13px;flex:1;margin-bottom:14px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.product-card .meta{display:flex;align-items:center;justify-content:space-between}
.product-card .price{color:var(--danger);font-size:18px;font-weight:700}
.product-card .price small{font-size:12px;font-weight:400;color:var(--text-mute);margin-right:2px}
.product-card .stock{font-size:12px;color:var(--text-mute)}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:9px 18px;border-radius:8px;font-size:14px;font-weight:500;
  border:1px solid transparent;cursor:pointer;transition:all .15s ease;
  background:#fff;color:var(--text);text-decoration:none;
}
.btn:hover{background:var(--bg-soft)}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-hover);border-color:var(--primary-hover);color:#fff}
.btn-outline{border-color:var(--border-strong);color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn-danger:hover{background:#dc2626;color:#fff}
.btn-block{display:flex;width:100%}
.btn-sm{padding:6px 12px;font-size:13px}

/* Card / form */
.card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow-sm);
}
.card-title{margin:0 0 18px;font-size:16px;font-weight:600}

.form-row{margin-bottom:16px}
.form-row label{display:block;margin-bottom:6px;color:var(--text-soft);font-size:13px;font-weight:500}
.form-row input,.form-row select,.form-row textarea{
  width:100%;padding:10px 12px;border:1px solid var(--border-strong);
  border-radius:8px;font-size:14px;background:#fff;color:var(--text);
  transition:border .15s,box-shadow .15s;font-family:inherit;
}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft);
}
.form-row textarea{min-height:120px;resize:vertical}
.form-help{font-size:12px;color:var(--text-mute);margin-top:6px}

/* Two-column layout for product detail */
.detail-layout{
  display:grid;grid-template-columns:1.5fr 1fr;gap:24px;
}
@media (max-width:880px){.detail-layout{grid-template-columns:1fr}}

.price-big{font-size:32px;font-weight:700;color:var(--danger);margin:8px 0 4px}
.price-big small{font-size:14px;font-weight:400;color:var(--text-mute);margin-right:4px}

/* Alert */
.alert{padding:12px 16px;border-radius:8px;margin-bottom:18px;font-size:14px;border:1px solid transparent}
.alert-info{background:#eff6ff;border-color:#dbeafe;color:#1e40af}
.alert-success{background:#ecfdf5;border-color:#a7f3d0;color:#065f46}
.alert-danger{background:#fef2f2;border-color:#fecaca;color:#991b1b}
.alert-warn{background:#fffbeb;border-color:#fde68a;color:#92400e}

/* Table */
.table{width:100%;border-collapse:collapse;background:#fff}
.table th,.table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);font-size:14px}
.table th{background:var(--bg-soft);color:var(--text-soft);font-weight:600;font-size:13px}
.table tr:hover td{background:#fafbfc}

/* Badge */
.badge{display:inline-block;padding:2px 8px;border-radius:99px;font-size:12px;font-weight:500}
.badge-success{background:#ecfdf5;color:#065f46}
.badge-warn{background:#fffbeb;color:#92400e}
.badge-mute{background:#f3f4f6;color:#4b5563}
.badge-primary{background:var(--primary-soft);color:var(--primary-hover)}

/* Card key */
.card-key{
  background:var(--bg-soft);border:1px dashed var(--border-strong);
  padding:14px 16px;border-radius:8px;font-family:Consolas,Monaco,monospace;
  font-size:14px;color:var(--text);word-break:break-all;
}

/* Login */
.auth-wrap{
  min-height:calc(100vh - 130px);
  display:flex;align-items:center;justify-content:center;padding:40px 20px;
}
.auth-box{
  width:100%;max-width:380px;background:#fff;
  border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px;box-shadow:var(--shadow-lg);
}
.auth-box h2{margin:0 0 6px;text-align:center}
.auth-box .sub{text-align:center;color:var(--text-mute);margin-bottom:22px;font-size:13px}

/* Admin layout */
.admin-layout{display:grid;grid-template-columns:220px 1fr;min-height:100vh}
.admin-sidebar{
  background:#fff;border-right:1px solid var(--border);padding:20px 0;
}
.admin-sidebar .brand{padding:0 22px 18px;font-weight:700;font-size:16px;border-bottom:1px solid var(--border)}
.admin-sidebar a{
  display:block;padding:11px 22px;color:var(--text-soft);font-size:14px;
  border-left:3px solid transparent;
}
.admin-sidebar a:hover{background:var(--bg-soft);color:var(--text)}
.admin-sidebar a.active{
  background:var(--primary-soft);color:var(--primary-hover);
  border-left-color:var(--primary);font-weight:500;
}
.admin-main{padding:28px 32px;background:var(--bg-soft);min-height:100vh}
.admin-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.admin-header h1{margin:0;font-size:22px;font-weight:600}

/* Stat cards */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px}
.stat-card .label{color:var(--text-mute);font-size:13px;margin-bottom:6px}
.stat-card .value{font-size:24px;font-weight:700;color:var(--text)}

/* Mobile */
@media (max-width:760px){
  .admin-layout{grid-template-columns:1fr}
  .admin-sidebar{display:flex;overflow-x:auto;padding:8px}
  .admin-sidebar .brand{display:none}
  .admin-sidebar a{border-left:none;border-bottom:3px solid transparent;white-space:nowrap}
  .admin-sidebar a.active{border-left:none;border-bottom-color:var(--primary)}
  .nav a{margin-left:14px}
  .hero{padding:32px 20px}
  .hero h1{font-size:24px}
}