:root{
  --primary:#3b6ef6;--primary-dark:#2f5ad8;--primary-soft:#eef3ff;
  --text:#101828;--text-2:#475467;--muted:#98a2b3;
  --border:#e6eaf0;--bg:#f5f7fa;--card:#fff;
  --green:#12a670;--orange:#e8862a;--red:#e5484d;--radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;min-height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);font-size:14px;-webkit-font-smoothing:antialiased}
.svg-sprite{position:absolute;width:0;height:0;overflow:hidden}
svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.hidden{display:none!important}
input,select,textarea,button{font-family:inherit;font-size:14px;outline:none}
input,select,textarea{color:var(--text)}

/* 登录 */
.login-view{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(140deg,#eef3ff 0%,#f7f9fc 45%,#eef6f5 100%);padding:24px}
.login-card{width:100%;max-width:400px;background:#fff;border:1px solid var(--border);border-radius:18px;padding:38px 36px 26px;box-shadow:0 18px 50px rgba(24,45,90,.08)}
.login-brand{display:flex;justify-content:center;margin-bottom:20px}
.brand-mark{width:46px;height:46px;border-radius:13px;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center}
.brand-mark svg{width:24px;height:24px;stroke-width:1.7}
.brand-mark-sm{width:36px;height:36px;border-radius:10px}
.brand-mark-sm svg{width:19px;height:19px}
.login-card h1{font-size:20px;text-align:center;margin:0 0 6px;letter-spacing:.2px}
.login-sub{text-align:center;color:var(--muted);font-size:13px;margin:0 0 26px}
.field-label{display:block;font-size:13px;color:var(--text-2);margin:0 0 8px;font-weight:500}
.input-wrap{position:relative;margin-bottom:18px}
.input-wrap input{width:100%;height:44px;border:1px solid var(--border);border-radius:9px;padding:0 12px 0 40px;background:#fbfcfe;transition:.15s}
.input-wrap input:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(59,110,246,.1)}
.input-icon{position:absolute;left:13px;top:13px;color:var(--muted);width:17px;height:17px}
.login-error{min-height:20px;color:var(--red);font-size:13px;margin:-4px 0 6px}
.login-foot{text-align:center;color:#b3bcc9;font-size:12px;margin:22px 0 0}

/* 布局 */
.app-view{display:flex;min-height:100vh}
.sidebar{width:228px;flex:none;background:#fff;border-right:1px solid var(--border);display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.sidebar-brand{display:flex;align-items:center;gap:11px;padding:22px 20px 24px;border-bottom:1px solid var(--border)}
.sidebar-brand strong{display:block;font-size:15px;line-height:1.3}
.sidebar-brand small{display:block;color:var(--muted);font-size:11px;margin-top:2px}
.nav{padding:16px 12px;flex:1}
.nav-item{display:flex;align-items:center;gap:11px;height:42px;padding:0 12px;border-radius:9px;color:var(--text-2);text-decoration:none;margin-bottom:4px;font-weight:500;transition:.15s}
.nav-item svg{width:18px;height:18px}
.nav-item:hover{background:#f5f7fb;color:var(--text)}
.nav-item.active{background:var(--primary-soft);color:var(--primary)}
.sidebar-foot{padding:14px 12px 18px;border-top:1px solid var(--border)}
.admin-chip{display:flex;align-items:center;gap:9px;padding:8px 12px;color:var(--text-2);font-size:13px}
.admin-chip svg{width:16px;height:16px;color:var(--muted)}
.logout-btn{width:100%;display:flex;align-items:center;gap:9px;height:38px;padding:0 12px;margin-top:6px;background:none;border:0;border-radius:8px;color:var(--muted);cursor:pointer;text-align:left}
.logout-btn:hover{background:#fdf2f2;color:var(--red)}
.logout-btn svg{width:16px;height:16px}
.main{flex:1;min-width:0}
.topbar{height:76px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 28px}
.topbar h2{margin:0;font-size:17px;font-weight:600}
.topbar p{margin:4px 0 0;color:var(--muted);font-size:12px}
.site-badge{background:#f5f7fa;border:1px solid var(--border);color:var(--text-2);font-size:12px;padding:6px 11px;border-radius:20px}
.content{padding:22px 28px 40px;max-width:1360px}

/* 通用组件 */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 1px 2px rgba(16,24,40,.02)}
.card-head{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.card-head h3{margin:0;font-size:14px;font-weight:600}
.card-head .sub{font-size:12px;color:var(--muted);margin-top:3px}
.card-body{padding:18px 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:36px;padding:0 14px;border-radius:8px;border:1px solid var(--border);background:#fff;color:var(--text-2);cursor:pointer;font-weight:500;white-space:nowrap;transition:.15s}
.btn svg{width:15px;height:15px}
.btn:hover{border-color:#c9d3e3;background:#fafbfe}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark)}
.btn-ghost{background:transparent;border-color:transparent}
.btn-danger{color:var(--red)}
.btn-sm{height:30px;padding:0 10px;font-size:12px}
.btn-block{width:100%;height:44px;font-size:15px}
.btn:disabled{opacity:.6;cursor:not-allowed}
.icon-btn{width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);background:#fff;border-radius:7px;color:var(--text-2);cursor:pointer}
.icon-btn:hover{color:var(--primary);border-color:#c7d6ff}
.icon-btn svg{width:14px;height:14px}
.icon-btn.danger:hover{color:var(--red);border-color:#f5c2c2}
.tag{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:20px;font-size:12px;font-weight:500;white-space:nowrap}
.tag-green{background:#e9f8f1;color:var(--green)}
.tag-gray{background:#f1f3f6;color:#7b8698}
.tag-orange{background:#fff2e4;color:var(--orange)}
.tag-red{background:#fdeeee;color:var(--red)}
.tag-blue{background:var(--primary-soft);color:var(--primary)}
.muted{color:var(--muted)}
.mono{font-variant-numeric:tabular-nums}
.loading{text-align:center;color:var(--muted);padding:44px 0;font-size:13px}
.empty{text-align:center;padding:48px 20px;color:var(--muted)}
.empty svg{width:34px;height:34px;color:#c9d2e0;margin-bottom:10px}
.error-box{background:#fdf2f2;color:var(--red);border:1px solid #f8d7d7;border-radius:9px;padding:12px 16px;font-size:13px}

/* 统计卡 */
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:18px}
.stat{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;display:flex;align-items:flex-start;justify-content:space-between}
.stat-label{color:var(--muted);font-size:12px;margin-bottom:10px}
.stat-value{font-size:26px;font-weight:650;line-height:1;font-variant-numeric:tabular-nums}
.stat-icon{width:36px;height:36px;border-radius:10px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center}
.stat-icon svg{width:18px;height:18px}
.stat-icon.green{background:#e9f8f1;color:var(--green)}
.stat-icon.orange{background:#fff2e4;color:var(--orange)}
.stat-icon.blue{background:#eef3ff;color:var(--primary)}

/* 工具条与表格 */
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:16px 20px;border-bottom:1px solid var(--border)}
.toolbar-left,.toolbar-right{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.search{position:relative}
.search svg{position:absolute;left:11px;top:10px;width:16px;height:16px;color:var(--muted)}
.search input{height:36px;width:230px;border:1px solid var(--border);border-radius:8px;padding:0 12px 0 34px;background:#fbfcfe}
.search input:focus{border-color:var(--primary);background:#fff}
select,.form-control{height:36px;border:1px solid var(--border);border-radius:8px;padding:0 10px;background:#fff;color:var(--text)}
select:focus,.form-control:focus{border-color:var(--primary)}
.table-wrap{overflow-x:auto}
.table{width:100%;border-collapse:collapse;font-size:13px}
.table th{text-align:left;padding:12px 16px;color:var(--muted);font-weight:500;background:#fafbfd;border-bottom:1px solid var(--border);white-space:nowrap}
.table td{padding:12px 16px;border-bottom:1px solid #f0f2f6;vertical-align:middle;color:var(--text-2)}
.table tr:last-child td{border-bottom:0}
.table tbody tr:hover{background:#fbfcff}
.cell-title{color:var(--text);font-weight:600;display:block;max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cell-sub{font-size:12px;color:var(--muted);margin-top:4px}
.thumb{width:56px;height:40px;border-radius:7px;object-fit:cover;background:#eef1f6;border:1px solid var(--border)}
.thumb-empty{width:56px;height:40px;border-radius:7px;background:#f1f4f9;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:#b9c3d2}
.thumb-empty svg{width:16px;height:16px}
.row-actions{display:flex;gap:6px;white-space:nowrap}
.pager{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-top:1px solid var(--border);color:var(--muted);font-size:12px}
.pager-btns{display:flex;gap:6px}

/* 表单与弹窗 */
.modal-mask{position:fixed;inset:0;background:rgba(16,24,40,.42);display:flex;align-items:flex-start;justify-content:center;padding:40px 20px;z-index:50;overflow-y:auto}
.modal{background:#fff;border-radius:14px;width:100%;max-width:720px;box-shadow:0 24px 60px rgba(16,24,40,.2);animation:pop .16s ease-out}
@keyframes pop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.modal-head{padding:18px 22px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.modal-head h3{margin:0;font-size:16px}
.modal-body{padding:20px 22px;max-height:calc(100vh - 210px);overflow-y:auto}
.modal-foot{padding:14px 22px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:10px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-item{display:flex;flex-direction:column;gap:7px;min-width:0}
.form-item.full{grid-column:1/-1}
.form-item label{font-size:12px;color:var(--text-2);font-weight:500}
.form-item label .req{color:var(--red);margin-left:2px}
.form-item input,.form-item textarea,.form-item select{width:100%;border:1px solid var(--border);border-radius:8px;padding:9px 11px;background:#fbfcfe}
.form-item input:focus,.form-item textarea:focus,.form-item select:focus{border-color:var(--primary);background:#fff}
.form-item textarea{resize:vertical;min-height:78px;line-height:1.6}
.form-hint{font-size:11px;color:var(--muted)}
.section-title{font-size:13px;font-weight:600;margin:22px 0 12px;padding-top:18px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.cover-row{display:flex;gap:12px;align-items:flex-start}
.cover-preview{width:112px;height:76px;border-radius:8px;border:1px solid var(--border);background:#f3f6fb;object-fit:cover;flex:none}
.cover-actions{display:flex;flex-direction:column;gap:8px;flex:1;min-width:0}
.cover-actions .form-control{width:100%}
.field-row{display:grid;grid-template-columns:1.1fr 1fr .9fr auto auto;gap:8px;align-items:center;margin-bottom:8px}
.field-row input,.field-row select{height:34px;border:1px solid var(--border);border-radius:7px;padding:0 9px;width:100%;background:#fbfcfe;font-size:12px}
.field-row .check{display:flex;align-items:center;gap:4px;font-size:12px;color:var(--text-2);white-space:nowrap}
.field-row .check input{width:auto;height:auto}
.field-empty{font-size:12px;color:var(--muted);padding:10px 0}
.toast{position:fixed;top:24px;left:50%;transform:translate(-50%,-16px);background:#101828;color:#fff;padding:11px 20px;border-radius:9px;font-size:13px;opacity:0;pointer-events:none;transition:.2s;z-index:100;box-shadow:0 10px 28px rgba(16,24,40,.22)}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.error{background:var(--red)}
.toast.success{background:var(--green)}
@media(max-width:1000px){.stat-grid{grid-template-columns:repeat(2,1fr)}.sidebar{width:190px}.content{padding:18px}}
@media(max-width:700px){.sidebar{width:64px}.sidebar-brand div,.nav-item span,.admin-chip span,.logout-btn span{display:none}.nav-item{justify-content:center}.sidebar-brand{justify-content:center;padding:18px 0}.form-grid{grid-template-columns:1fr}.stat-grid{grid-template-columns:1fr 1fr}}