/* ============================================================
   后台管理样式
   ============================================================ */
:root{
  --red:#A61B29; --red-dark:#7E1220;
  --gold:#C9A227; --gold-dark:#A5821C;
  --ink:#2B2B2B; --gray:#777; --line:#E3DCCB;
  --bg:#F3F0E9;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;background:var(--bg);color:var(--ink);font-size:14px}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.ad-wrap{max-width:1400px;margin:0 auto;padding:0 20px}

/* 头部 */
.ad-header{background:linear-gradient(90deg,#3d070d,#5E0D18 50%,#3d070d);color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.3)}
.ad-header .ad-wrap{display:flex;justify-content:space-between;align-items:center;height:52px}
.ad-brand b{font-family:STZhongsong,serif;font-size:18px;letter-spacing:3px;color:var(--gold)}
.ad-user{display:flex;gap:16px;align-items:center;font-size:13px}
.ad-user a{color:#E8D9A8}
.ad-user a:hover{color:#fff}

/* 布局 */
.ad-body{display:flex;min-height:calc(100vh - 104px)}
.ad-side{width:210px;background:#fff;border-right:1px solid var(--line);padding:14px 0;flex-shrink:0}
.ad-side a{display:block;padding:11px 22px;font-size:14px;color:#444;border-left:3px solid transparent}
.ad-side a:hover{background:#FBF4E4;color:var(--red)}
.ad-side a.active{background:#FDF3F4;color:var(--red);border-left-color:var(--red);font-weight:600}
.ad-main{flex:1;padding:24px 28px;min-width:0}
.ad-foot{background:#fff;border-top:1px solid var(--line);padding:12px 20px;font-size:12.5px;color:var(--gray);text-align:center}

/* 页头 */
.ad-page-title{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:20px;flex-wrap:wrap;gap:10px}
.ad-page-title h1{font-family:STZhongsong,serif;font-size:24px;color:var(--red-dark);letter-spacing:2px}
.ad-page-title p{color:var(--gray);font-size:13px;margin-top:4px}

/* 统计卡 */
.ad-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:22px}
.stat-card{background:#fff;border:1px solid var(--line);border-top:3px solid var(--red);padding:16px 18px;position:relative}
.stat-card b{font-family:STZhongsong,serif;font-size:30px;color:var(--red);display:block;line-height:1.1}
.stat-card span{color:var(--gray);font-size:13px}
.stat-card a{position:absolute;right:14px;bottom:12px;font-size:12px;color:var(--gold-dark)}
.stat-card.warn{border-top-color:#E8730C}
.stat-card.warn b{color:#E8730C}

/* 卡片 */
.ad-cols{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.ad-card{background:#fff;border:1px solid var(--line);padding:18px 20px}
.ad-card h2{font-family:STZhongsong,serif;font-size:17px;color:var(--red-dark);border-left:4px solid var(--red);padding-left:10px;margin-bottom:14px;letter-spacing:1px}

/* 表格 */
.ad-tbl{width:100%;border-collapse:collapse;font-size:13.5px}
.ad-tbl th{background:#FAF6EA;color:#5a5344;text-align:left;padding:9px 10px;border-bottom:2px solid var(--gold);font-weight:600;white-space:nowrap}
.ad-tbl td{padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
.ad-tbl tr:hover td{background:#FDF9EE}
.tag{display:inline-block;background:#F0EDE4;color:#5a5344;font-size:11.5px;padding:1px 9px;border-radius:10px}
.tag-red{background:#FDEEEF;color:var(--red)}
.tag-green{background:#EEF7F0;color:#1E8E3E}
.tag-gold{background:#FBF0D2;color:var(--gold-dark)}

/* 按钮 */
.btn{display:inline-block;border:none;cursor:pointer;padding:8px 20px;font-size:13.5px;border-radius:3px;letter-spacing:1px;background:#F0EDE4;color:#444}
.btn:hover{opacity:.88}
.btn-primary{background:linear-gradient(135deg,var(--red),var(--red-dark));color:#fff}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-dark));color:#fff}
.btn-danger{background:#FDEEEF;color:var(--red);border:1px solid #E8B4BA}
.btn-sm{padding:4px 12px;font-size:12.5px}
.btn-block{width:100%;text-align:center;display:block}

/* 表单 */
.ad-form{background:#fff;border:1px solid var(--line);padding:26px;max-width:900px}
.form-item{margin-bottom:18px}
.form-item label{display:block;font-size:13.5px;color:#555;margin-bottom:6px;font-weight:600}
.form-item label .req{color:var(--red)}
.form-item input[type=text],.form-item input[type=password],.form-item input[type=number],.form-item input[type=url],.form-item select,.form-item textarea{width:100%;padding:9px 12px;border:1.5px solid var(--line);border-radius:4px;font-size:14px;outline:none;font-family:inherit}
.form-item input:focus,.form-item select:focus,.form-item textarea:focus{border-color:var(--gold)}
.form-item textarea{min-height:150px;resize:vertical}
.form-item .hint{font-size:12px;color:var(--gray);margin-top:4px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-actions{padding-top:8px;display:flex;gap:12px}
.form-alert{padding:11px 15px;border-radius:4px;font-size:13.5px;margin-bottom:16px}
.form-alert.ok{background:#EEF7F0;border:1px solid #1E8E3E;color:#14532D}
.form-alert.err{background:#FDEEEF;border:1px solid #E8B4BA;color:var(--red-dark)}

/* 上传区 */
.upload-drop{border:2px dashed var(--line);background:#FCFAF4;border-radius:6px;padding:34px;text-align:center;cursor:pointer;transition:border-color .2s}
.upload-drop:hover,.upload-drop.over{border-color:var(--gold)}
.upload-drop .up-icon{font-size:40px}
.upload-drop p{color:var(--gray);font-size:13px;margin-top:8px}
.upload-progress{height:8px;background:var(--line);border-radius:4px;overflow:hidden;margin-top:14px;display:none}
.upload-progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--gold),var(--red));transition:width .2s}

/* 列表工具条 */
.ad-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;gap:10px;flex-wrap:wrap}
.ad-bar .filters{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.ad-bar input,.ad-bar select{padding:7px 10px;border:1.5px solid var(--line);border-radius:4px;font-size:13px;outline:none;background:#fff}
.ad-bar input:focus,.ad-bar select:focus{border-color:var(--gold)}

/* 分页 */
.ad-pager{display:flex;gap:6px;justify-content:center;margin-top:18px}
.ad-pager a,.ad-pager span{padding:5px 12px;border:1px solid var(--line);background:#fff;font-size:13px;border-radius:3px}
.ad-pager .cur{background:var(--red);border-color:var(--red);color:#fff}
.ad-pager .dis{color:#bbb;background:#f6f6f6}

/* 登录页 */
.login-body{background:linear-gradient(150deg,#2b0a10,#5E0D18 55%,#2b0a10);min-height:100vh;display:flex;align-items:center;justify-content:center}
.login-box{background:#fff;width:400px;padding:36px 34px;border-radius:8px;box-shadow:0 18px 60px rgba(0,0,0,.45);border-top:4px solid var(--gold)}
.login-emblem{text-align:center;margin-bottom:10px}
.login-box h1{font-family:STZhongsong,serif;font-size:21px;text-align:center;color:var(--red-dark);letter-spacing:2px}
.login-sub{text-align:center;color:var(--gray);font-size:12.5px;margin:6px 0 20px}
.login-err{background:#FDEEEF;border:1px solid #E8B4BA;color:var(--red-dark);padding:9px 14px;border-radius:4px;font-size:13px;margin-bottom:16px;text-align:center}
.login-tip{text-align:center;color:var(--gray);font-size:12px;margin-top:16px}
.login-back{text-align:center;margin-top:10px}
.login-back a{color:var(--gold-dark);font-size:13px}

@media (max-width:900px){
  .ad-side{display:none}
  .ad-stats{grid-template-columns:repeat(2,1fr)}
  .ad-cols{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
}