*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#2563eb;--primary-hover:#1d4ed8;--accent:#f59e0b;--danger:#ef4444;--success:#10b981;--info:#06b6d4;--bg:#f1f5f9;--card:#fff;--border:#e2e8f0;--text:#1e293b;--text2:#64748b;--text3:#94a3b8;--radius:8px;--shadow:0 1px 3px rgba(0,0,0,.06)}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}
a{color:var(--primary);text-decoration:none}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}

.login-wrapper{display:flex;justify-content:center;align-items:center;min-height:100vh;background:var(--bg)}
.login-card{background:var(--card);padding:40px;border-radius:16px;width:400px;max-width:92%;box-shadow:var(--shadow)}
.login-card h2{text-align:center;margin-bottom:4px;color:var(--text);font-size:22px;font-weight:700}
.login-sub{text-align:center;color:var(--text2);margin-bottom:28px;font-size:13px}

.admin-layout{display:flex;flex-direction:column;min-height:100vh}
.admin-header{background:var(--card);border-bottom:1px solid var(--border);padding:0 24px;height:56px;display:flex;align-items:center;justify-content:space-between;flex-shrink:0;z-index:10}
.header-left{display:flex;align-items:center;gap:12px}
.header-logo{font-size:16px;font-weight:700;color:var(--text)}
.header-right{display:flex;align-items:center;gap:16px}
.header-user{color:var(--text2);font-size:13px}
.btn-logout{color:var(--danger);font-size:13px;cursor:pointer}
.btn-logout:hover{text-decoration:underline}

.admin-body{display:flex;flex:1}
.admin-sidebar{width:220px;background:var(--card);border-right:1px solid var(--border);padding:12px 0;flex-shrink:0;overflow-y:auto}
.sidebar-section{padding:16px 20px 6px;font-size:11px;text-transform:uppercase;color:var(--text3);letter-spacing:.5px;font-weight:600}
.sidebar-item{display:flex;align-items:center;gap:10px;padding:9px 20px;color:var(--text2);text-decoration:none;transition:all .15s;font-size:14px;border-left:3px solid transparent;margin:1px 0}
.sidebar-item:hover{background:#f8fafc;color:var(--text)}
.sidebar-item.active{background:#eff6ff;color:var(--primary);border-left-color:var(--primary);font-weight:600}

.admin-content{flex:1;padding:28px 32px;overflow-y:auto;max-width:1400px}
.admin-content h2{font-size:22px;font-weight:700;margin-bottom:24px;color:var(--text)}

.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px;margin-bottom:28px}
.stat-card{background:var(--card);border-radius:var(--radius);padding:20px 24px;box-shadow:var(--shadow);border:1px solid var(--border)}
.stat-value{font-size:32px;font-weight:700;color:var(--primary);line-height:1.2}
.stat-label{color:var(--text2);font-size:13px;margin-top:4px}

.data-table{width:100%;background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);border-collapse:collapse}
.data-table th,.data-table td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--border);font-size:13px}
.data-table th{background:#f8fafc;font-weight:600;color:var(--text2);font-size:12px;text-transform:uppercase;letter-spacing:.3px}
.data-table tbody tr:hover td{background:#f8fafc}
.data-table select{padding:4px 8px;border:1px solid var(--border);border-radius:4px;font-size:12px;background:var(--card);color:var(--text)}

.card{background:var(--card);border-radius:var(--radius);padding:20px 24px;box-shadow:var(--shadow);border:1px solid var(--border)}
.card h3{margin-bottom:16px;color:var(--text);font-size:16px}

.form-group{margin-bottom:16px}
.form-group label{display:block;margin-bottom:5px;font-size:13px;color:var(--text2);font-weight:500}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;background:var(--card);color:var(--text);transition:border-color .15s}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.form-row{display:flex;gap:16px}.form-row .form-group{flex:1}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--card);color:var(--text);cursor:pointer;font-size:13px;font-weight:500;transition:all .15s;white-space:nowrap}
.btn:hover{background:#f8fafc}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-hover)}
.btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn-danger:hover{background:#dc2626}
.btn-success{background:var(--success);color:#fff;border-color:var(--success)}
.btn-block{display:flex;width:100%}
.btn-sm{padding:4px 10px;font-size:12px}
.btn-xs{padding:2px 8px;font-size:11px}

.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:600}
.badge-success{background:#d1fae5;color:#065f46}.badge-warning{background:#fef3c7;color:#92400e}
.badge-info{background:#dbeafe;color:#1e40af}.badge-danger{background:#fee2e2;color:#991b1b}
.badge-secondary{background:#f1f5f9;color:#475569}

.toolbar{display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}
.toolbar input,.toolbar select{padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;background:var(--card);color:var(--text)}

.tabs{display:flex;gap:2px;margin-bottom:24px;border-bottom:2px solid var(--border)}
.tab-item{padding:10px 24px;cursor:pointer;font-size:14px;font-weight:500;color:var(--text2);border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .15s;user-select:none}
.tab-item:hover{color:var(--text)}.tab-item.active{color:var(--primary);border-bottom-color:var(--primary)}

.category-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.category-item{padding:7px 16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;display:flex;align-items:center;gap:10px;transition:all .15s;font-size:13px}
.category-item:hover,.category-item.active{border-color:var(--primary);background:#eff6ff;color:var(--primary)}
.category-actions{display:flex;gap:4px;margin-left:auto}

.image-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}
.image-card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);transition:box-shadow .2s}
.image-card:hover{box-shadow:0 4px 12px rgba(0,0,0,.1)}
.image-card img{width:100%;aspect-ratio:3/4;object-fit:cover;display:block}
.image-card-info{padding:10px 12px;display:flex;align-items:center;justify-content:space-between;gap:8px}
.image-card-info span{font-size:12px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.modal{position:fixed;top:0;left:0;right:0;bottom:0;display:flex;justify-content:center;align-items:center;z-index:1000}
.modal-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.3);backdrop-filter:blur(2px)}
.modal-content{position:relative;background:var(--card);border-radius:12px;padding:28px;max-width:540px;width:92%;max-height:82vh;overflow-y:auto;box-shadow:0 20px 40px rgba(0,0,0,.15);border:1px solid var(--border)}
.modal-content h3{margin-bottom:16px;font-size:17px;font-weight:700}

.pager{display:flex;gap:6px;justify-content:center;margin-top:20px}
.page-item{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;font-size:13px;background:var(--card);transition:all .15s;color:var(--text2)}
.page-item:hover,.page-item.active{background:var(--primary);color:#fff;border-color:var(--primary)}

.text-muted{color:var(--text2);font-size:13px}
.text-sm{font-size:12px}
.empty-state{text-align:center;padding:60px 20px;color:var(--text3)}
.empty-state-icon{font-size:40px;margin-bottom:12px}