*,*::before,*::after{box-sizing:border-box}
:root{--bg:#f5f7fb;--card:#fff;--text:#1c2333;--muted:#6b7280;--line:#e6e9f0;--primary:#2563eb;--primary-d:#1d4ed8;--ok:#0f9d58;--warn:#d97706;--danger:#dc2626;--radius:12px;--shadow:0 2px 12px rgba(20,30,60,.06)}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font:15px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:1120px;margin:0 auto;padding:0 18px}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.site-header .bar{display:flex;align-items:center;gap:22px;height:62px}
.brand{font-size:19px;font-weight:700;color:var(--text);white-space:nowrap}
.brand:hover{text-decoration:none}
.nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.nav a{color:#3b4252;font-size:14px}
.nav-spacer{flex:1}
.site-main{padding:28px 0 56px;min-height:70vh}
.site-footer{border-top:1px solid var(--line);background:#fff;color:var(--muted);font-size:13px;padding:22px 0;text-align:center}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;margin-bottom:18px}
.card h2,.card h3{margin:0 0 14px;font-size:18px}
.hero{background:linear-gradient(120deg,#eef4ff,#f7fbff);border:1px solid #dfe9ff;border-radius:16px;padding:34px 30px;margin-bottom:26px}
.hero h1{font-size:28px;margin:0 0 8px}
.hero p{color:var(--muted);margin:0 0 18px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.product-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.18s}
.product-card:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(20,30,60,.1)}
.product-cover{height:150px;background:linear-gradient(135deg,#dbeafe,#ede9fe);display:flex;align-items:center;justify-content:center;font-size:40px;color:#6366f1}
.product-body{padding:16px;flex:1;display:flex;flex-direction:column;gap:8px}
.product-title{font-size:16px;font-weight:600;color:var(--text)}
.product-desc{color:var(--muted);font-size:13px;min-height:38px}
.price{color:#e11d48;font-size:20px;font-weight:700}
.price-old{color:var(--muted);text-decoration:line-through;font-size:13px;margin-left:8px;font-weight:400}
.meta{color:var(--muted);font-size:13px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid transparent;background:var(--primary);color:#fff;padding:9px 16px;border-radius:9px;font-size:14px;font-weight:600;cursor:pointer;line-height:1.4}
.btn:hover{background:var(--primary-d);text-decoration:none;color:#fff}
.btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
.btn-secondary:hover{background:#f3f4f6;color:var(--text)}
.btn-danger{background:#fff;color:var(--danger);border-color:#fecaca}
.btn-danger:hover{background:#fef2f2;color:var(--danger)}
.btn-sm{padding:5px 11px;font-size:13px;border-radius:7px}
.btn-block{width:100%}
.btn:disabled{opacity:.55;cursor:not-allowed}
label{display:block;font-size:14px;font-weight:600;margin:0 0 6px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=url],textarea,select{width:100%;border:1px solid var(--line);border-radius:9px;padding:9px 11px;font:inherit;background:#fff;color:var(--text)}
input:focus,textarea:focus,select:focus{outline:2px solid #bfdbfe;border-color:var(--primary)}
textarea{min-height:110px;resize:vertical}
.field{margin-bottom:16px}
.field .hint{color:var(--muted);font-size:12px;font-weight:400;margin-top:5px}
.form-narrow{max-width:430px;margin:0 auto}
.alert{padding:11px 14px;border-radius:9px;margin-bottom:16px;font-size:14px}
.alert-ok{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.alert-error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:11px 10px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600;background:#fafbfe}
tr:last-child td{border-bottom:0}
.table-wrap{overflow-x:auto}
.tag{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;font-weight:600;background:#eef2ff;color:#4338ca}
.tag-ok{background:#ecfdf5;color:#047857}
.tag-warn{background:#fffbeb;color:#b45309}
.tag-danger{background:#fef2f2;color:#b91c1c}
.tag-muted{background:#f3f4f6;color:#6b7280}
.code-box{background:#f8fafc;border:1px dashed #cbd5e1;border-radius:9px;padding:12px 14px;margin-bottom:10px}
.code-box .line{font-family:ui-monospace,Consolas,monospace;font-size:14px;word-break:break-all}
.code-box .label{color:var(--muted);font-size:12px;margin-right:8px}
.section-title{font-size:20px;margin:0 0 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.breadcrumb{color:var(--muted);font-size:13px;margin-bottom:16px}
.detail-grid{display:grid;grid-template-columns:1fr 320px;gap:22px}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin-bottom:20px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.stat .num{font-size:24px;font-weight:700}
.stat .lbl{color:var(--muted);font-size:13px}
.admin-wrap{display:grid;grid-template-columns:210px 1fr;gap:20px;align-items:start}
.admin-nav{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:10px;position:sticky;top:78px}
.admin-nav a{display:block;padding:9px 12px;border-radius:8px;color:#3b4252;font-size:14px}
.admin-nav a:hover,.admin-nav a.active{background:#eff6ff;color:var(--primary-d);text-decoration:none}
.channel-list{display:grid;gap:10px;margin:14px 0}
.channel-item{border:1px solid var(--line);border-radius:9px;padding:12px 14px;display:flex;align-items:center;gap:10px;cursor:pointer}
.channel-item:has(input:checked){border-color:var(--primary);background:#eff6ff}
.pagination{display:flex;gap:8px;align-items:center;margin-top:16px;font-size:14px;flex-wrap:wrap}
.pagination a,.pagination span{padding:6px 11px;border:1px solid var(--line);border-radius:7px;background:#fff}
.empty{text-align:center;color:var(--muted);padding:44px 16px}
.inline-form{display:inline}
.row-actions{display:flex;gap:6px;flex-wrap:wrap}
.admin-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
@media(max-width:760px){.detail-grid,.admin-wrap,.admin-form-grid{grid-template-columns:1fr}.admin-nav{position:static}.site-header .bar{height:auto;padding:12px 0;flex-wrap:wrap;gap:12px}.nav{gap:12px}.hero{padding:24px 18px}.hero h1{font-size:22px}}