:root{--color-bg: #f5f5f5;--color-surface: #ffffff;--color-primary: #1a1a1a;--color-primary-hover: #333;--color-accent: #2563eb;--color-accent-light: #eff6ff;--color-text: #1a1a1a;--color-text-secondary: #555;--color-text-muted: #999;--color-border: #e5e5e5;--color-border-light: #f0f0f0;--color-sidebar: #1a1a1a;--color-sidebar-hover: #333;--color-success: #16a34a;--color-success-bg: #f0fdf4;--color-danger: #dc2626;--color-danger-bg: #fef2f2;--radius: 10px;--radius-lg: 14px;--shadow: 0 1px 3px rgba(0,0,0,.08);--shadow-md: 0 4px 12px rgba(0,0,0,.1)}*{box-sizing:border-box}body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;font-size:18px;line-height:1.6}button,input,select,textarea{font:inherit}button{border:0;cursor:pointer;font-weight:500}input,select,textarea{width:100%;border:1.5px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);color:var(--color-text);padding:14px 18px;font-size:18px}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--color-accent);box-shadow:0 0 0 3px #2563eb1a}select{cursor:pointer;height:54px}textarea{resize:vertical;min-height:100px}h1,h2,h3{margin:0;color:var(--color-text)}h1{font-size:32px;font-weight:700}h2{font-size:24px;font-weight:600}.login-page{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:var(--color-bg)}.login-hero{display:flex;flex-direction:column;justify-content:center;padding:80px;background:linear-gradient(135deg,#0f172a,#1e293b 40%,#1a1a2e);color:#fff}.login-brand{margin-bottom:48px;font-size:40px;letter-spacing:16px;font-weight:700}.login-hero h1{margin:0;font-size:56px;line-height:1.2;font-weight:600;color:#fff}.login-hero p{margin:24px 0 0;color:#ffffff73;font-size:20px}.login-card-wrap{display:flex;align-items:center;justify-content:center;padding:48px}.login-card{width:480px;max-width:100%;padding:56px 48px;border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow-md)}.login-card h2{margin-bottom:32px;font-size:32px}.login-card label{display:block;margin:24px 0 10px;font-weight:600;font-size:17px}.login-card label:first-of-type{margin-top:0}.login-card input{height:58px;background:var(--color-bg);font-size:18px}.wide{width:100%;margin-top:32px;height:58px;border-radius:var(--radius);font-size:20px;font-weight:600}.error-text{margin:20px 0 0;padding:14px 20px;border-radius:var(--radius);background:var(--color-danger-bg);color:var(--color-danger);font-size:17px;text-align:center}.admin-shell{min-height:100vh;display:grid;grid-template-columns:260px 1fr;background:var(--color-bg)}.side{padding:40px 24px;background:var(--color-sidebar);color:#fff;display:flex;flex-direction:column}.side-brand{padding:0 8px 36px;border-bottom:1px solid rgba(255,255,255,.08);margin-bottom:28px;font-size:28px;letter-spacing:10px;font-weight:700}.side-brand span{display:block;margin-top:10px;color:#ffffff4d;font-size:15px;letter-spacing:4px;font-weight:400}.side nav{flex:1;display:flex;flex-direction:column;gap:4px}.side nav button{height:60px;padding:0 20px;border-radius:var(--radius);background:transparent;color:#ffffff80;text-align:left;font-size:19px;display:flex;align-items:center;gap:14px}.side nav button:hover{background:var(--color-sidebar-hover);color:#ffffffd9}.side nav button.active{background:#fff;color:#1a1a1a;font-weight:600}.tab-icon{font-size:22px}.logout{margin-top:auto;height:50px;border-radius:var(--radius);background:#ffffff0f;color:#fff6;font-size:16px}.logout:hover{background:#ffffff1a;color:#ffffffb3}.main{padding:44px 48px;overflow-y:auto;height:100vh}.top-header{margin-bottom:36px}.top-header h1{font-size:34px}.primary{height:50px;padding:0 28px;border-radius:var(--radius);background:var(--color-primary);color:#fff;font-weight:600;font-size:18px}.primary:hover{background:var(--color-primary-hover)}.primary:disabled{opacity:.35;cursor:not-allowed}.page-editor{display:flex;flex-direction:column;gap:36px}.editor-section{padding:36px;border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow)}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.section-desc{margin:8px 0 24px;color:var(--color-text-muted);font-size:16px}.empty-hint{padding:40px;text-align:center;color:var(--color-text-muted);font-size:17px;background:var(--color-border-light);border-radius:var(--radius)}.banner-card{display:flex;align-items:center;gap:24px;padding:20px;border:1.5px solid var(--color-border);border-radius:var(--radius);cursor:pointer;transition:border-color .15s}.banner-card:hover{border-color:var(--color-accent)}.banner-preview{width:200px;height:110px;border-radius:8px;overflow:hidden;flex-shrink:0;background:var(--color-border-light)}.banner-preview img{width:100%;height:100%;object-fit:cover}.banner-info{flex:1;display:flex;flex-direction:column;gap:8px}.banner-info strong{font-size:20px}.tag{display:inline-block;padding:4px 14px;border-radius:100px;background:var(--color-accent-light);color:var(--color-accent);font-size:15px;font-weight:600;align-self:flex-start}.status-dot{font-size:15px;font-weight:600}.status-dot.on{color:var(--color-success)}.status-dot.off{color:var(--color-text-muted)}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}.content-card{border:1.5px solid var(--color-border);border-radius:var(--radius);overflow:hidden;transition:box-shadow .15s}.content-card:hover{box-shadow:var(--shadow-md)}.card-image{position:relative;height:180px;background:var(--color-border-light);overflow:hidden}.card-image img{width:100%;height:100%;object-fit:cover}.no-image{display:flex;align-items:center;justify-content:center;height:100%;color:var(--color-text-muted);font-size:16px}.type-badge{position:absolute;top:10px;right:10px;padding:4px 12px;border-radius:100px;background:#000000a6;color:#fff;font-size:14px;font-weight:600}.card-body{padding:18px}.card-body strong{display:block;font-size:19px;margin-bottom:4px}.card-body small{display:block;color:var(--color-text-muted);font-size:15px;margin-bottom:10px}.card-meta{display:flex;gap:20px;font-size:15px;color:var(--color-text-secondary)}.text-green{color:var(--color-success);font-weight:600}.text-gray{color:var(--color-text-muted)}.card-actions{display:flex;border-top:1px solid var(--color-border-light)}.card-actions button{flex:1;height:46px;background:transparent;font-size:17px}.card-actions button:first-child{border-right:1px solid var(--color-border-light)}.link{background:transparent;color:var(--color-accent);font-weight:500}.link:hover{text-decoration:underline}.link.danger{color:var(--color-danger)}.text-fields{display:flex;flex-direction:column;gap:16px}.text-row{display:grid;grid-template-columns:200px 1fr;gap:20px;align-items:center}.text-row label{font-weight:600;font-size:17px;color:var(--color-text-secondary)}.text-row input{height:50px;font-size:17px}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:100}.modal{width:600px;max-height:88vh;overflow-y:auto;padding:40px;border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow-md)}.simple-modal{width:560px}.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px}.close{width:40px;height:40px;border-radius:8px;background:var(--color-bg);color:var(--color-text-secondary);font-size:28px;display:flex;align-items:center;justify-content:center}.close:hover{background:var(--color-border);color:var(--color-text)}.form-grid{margin-bottom:22px}.form-grid>label:first-child{display:block;margin-bottom:8px;font-weight:600;font-size:17px;color:var(--color-text-secondary)}.upload-row{display:flex;gap:12px}.upload-row input{flex:1}.upload-btn{height:50px;padding:0 24px;border-radius:var(--radius);background:var(--color-bg);border:1.5px solid var(--color-border);font-size:17px;font-weight:500;white-space:nowrap}.upload-btn:hover{background:var(--color-border-light);border-color:var(--color-accent);color:var(--color-accent)}.form-preview{margin-top:12px;max-width:200px;max-height:120px;border-radius:8px;object-fit:cover}.radio-group{display:flex;gap:20px;flex-wrap:wrap;padding-top:4px}.radio-item{display:flex;align-items:center;gap:6px;font-size:17px;cursor:pointer}.radio-item input[type=radio]{width:20px;height:20px;accent-color:var(--color-accent)}.check{display:flex;align-items:center;gap:10px;cursor:pointer;font-size:17px;padding-top:4px}.check input[type=checkbox]{width:22px;height:22px;accent-color:var(--color-accent)}.modal-foot{margin-top:32px;display:flex;justify-content:flex-end;gap:14px}.modal-foot button{height:50px;padding:0 32px;border-radius:var(--radius);font-size:18px;font-weight:600}.cancel{background:var(--color-bg);color:var(--color-text-secondary);border:1.5px solid var(--color-border)}.cancel:hover{background:var(--color-border-light)}.panel{border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow);padding:36px}.panel h2{margin-bottom:24px}.mini-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.stat-card{padding:24px;border-radius:var(--radius);background:var(--color-bg)}.stat-card span{color:var(--color-text-secondary);font-size:16px}.stat-card strong{display:block;margin-top:8px;font-size:36px;font-weight:700}.filters{display:flex;gap:12px}.filters input{flex:1;height:50px}.filters button{height:50px;padding:0 28px;border-radius:var(--radius);background:var(--color-primary);color:#fff;font-weight:600;font-size:17px}table{width:100%;border-collapse:collapse;text-align:left}thead th{padding:14px 18px;border-bottom:2px solid var(--color-border);color:var(--color-text-secondary);font-weight:600;font-size:16px}tbody td{padding:16px 18px;border-bottom:1px solid var(--color-border-light);font-size:17px}tbody tr:hover{background:#fafafa}.tree-manager{display:grid;grid-template-columns:360px minmax(0,1fr);gap:24px;align-items:start}.tree-panel{min-height:calc(100vh - 132px);padding:24px;border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow)}.tree-panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.primary.small{height:42px;padding:0 18px;font-size:16px}.tree-list{display:flex;flex-direction:column;gap:8px}.tree-node{width:100%;min-height:58px;padding:10px 14px;border-radius:var(--radius);background:var(--color-bg);color:var(--color-text);text-align:left;display:flex;flex-direction:column;justify-content:center;gap:2px}.tree-node:hover,.tree-node.active{background:var(--color-primary);color:#fff}.tree-node small{color:var(--color-text-muted);font-size:13px;font-weight:400}.tree-node.active small,.tree-node:hover small{color:#fff9}.tree-children{margin:8px 0 12px 18px;padding-left:14px;border-left:2px solid var(--color-border);display:flex;flex-direction:column;gap:8px}.tree-node.child{min-height:52px;background:#fafafa}.tree-detail{min-height:calc(100vh - 132px)}.tree-detail-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:28px}.node-meta{margin-top:10px;display:flex;flex-wrap:wrap;gap:10px}.node-meta span{padding:4px 10px;border-radius:999px;background:var(--color-bg);color:var(--color-text-secondary);font-size:14px}.detail-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px}.content-table-wrap{overflow-x:auto}