:root{--primary:#2196f3;--primary-dark:#1976d2;--primary-light:#e3f2fd;--success:#0f9d58;--warning:#f4b400;--danger:#db4437;--info:#4285f4;--bg:#f0f7ff;--bg-card:#fff;--bg-sidebar:#87ceeb;--text:#1f2937;--text-secondary:#4a5568;--text-muted:#718096;--text-light:#4a5568;--border:#e5e7eb;--border-light:#f0f0f0;--sidebar-width:240px;--header-height:60px;--radius:8px;--radius-sm:4px;--radius-lg:12px;--shadow-sm:0 1px 2px #0000000d;--shadow:0 1px 3px #0000001a, 0 1px 2px #0000000f;--shadow-md:0 4px 6px #00000012, 0 2px 4px #0000000f;--shadow-lg:0 10px 15px #0000001a, 0 4px 6px #0000000d;--transition:.2s ease}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;font-size:14px}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;line-height:1.6}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.app-layout{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-width);background:var(--bg-sidebar);color:var(--text-light);z-index:100;height:100vh;transition:transform var(--transition);flex-direction:column;display:flex;position:fixed;top:0;left:0}.sidebar-logo{text-align:center;padding:20px 20px 12px}.sidebar-logo h1{display:none}.sidebar-logo p{color:var(--text-muted);margin-top:2px;font-size:11px}.side-logo-img{filter:none;width:48px;height:auto;margin-bottom:8px}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-track{background:0 0}.sidebar::-webkit-scrollbar-thumb{background:#0000001f;border-radius:4px}.sidebar::-webkit-scrollbar-thumb:hover{background:#0003}.sidebar-nav::-webkit-scrollbar{width:4px}.sidebar-nav::-webkit-scrollbar-track{background:0 0}.sidebar-nav::-webkit-scrollbar-thumb{background:#0000001f;border-radius:4px}.sidebar-nav::-webkit-scrollbar-thumb:hover{background:#0003}.sidebar-nav{flex:1;padding:8px 0;overflow-y:auto}.nav-section{text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);padding:8px 20px 4px;font-size:10px}.nav-item{color:var(--text-secondary);cursor:pointer;transition:all var(--transition);border-left:3px solid #0000;align-items:center;gap:10px;padding:9px 20px;font-size:13px;display:flex;position:relative}.nav-item:before{content:"";transition:background var(--transition);z-index:-1;background:0 0;position:absolute;inset:0}.nav-item:hover{border-left-color:#2196f3}.nav-item:hover:before{background:#0000000f}.nav-item.active{color:var(--text);border-left-color:#2196f3}.nav-item.active:before{background:#00000014}.nav-item .icon{text-align:center;width:18px;font-size:15px}.sub-nav{padding:0 0 4px 28px}.sub-nav-item{color:var(--text-muted);cursor:pointer;transition:all var(--transition);border-radius:4px;align-items:center;gap:8px;padding:7px 16px;font-size:12px;display:flex}.sub-nav-item:hover{color:var(--text);background:#0000000f}.sub-nav-item.active{color:var(--text);background:#00000014}.sub-nav-item .icon{text-align:center;width:16px;font-size:13px}.sidebar-footer{color:var(--text-muted);border-top:1px solid #00000014;padding:12px 20px;font-size:12px}.user-info{color:var(--text);align-items:center;gap:8px;margin-bottom:8px;display:flex}.user-info .avatar{width:28px;height:28px;color:var(--text);background:#0000001a;border-radius:50%;justify-content:center;align-items:center;font-size:12px;font-weight:600;display:flex}.logout-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;padding:4px 0;font-size:12px}.logout-btn:hover{color:var(--danger)}.main-content{margin-left:var(--sidebar-width);flex:1;min-height:100vh}.topbar{height:var(--header-height);background:var(--bg-card);border-bottom:1px solid var(--border);z-index:50;justify-content:space-between;align-items:center;padding:0 32px;display:flex;position:sticky;top:0}.topbar h2{font-size:18px;font-weight:600}.topbar-actions{align-items:center;gap:16px;display:flex}.page-content{padding:24px 32px}.login-page{background:linear-gradient(135deg,#1a73e8 0%,#0d47a1 100%);justify-content:center;align-items:center;min-height:100vh;display:flex}.login-card{border-radius:var(--radius-lg);width:400px;box-shadow:var(--shadow-lg);background:#fff;padding:40px}.login-card h1{margin-bottom:4px;font-size:24px;font-weight:700}.login-card p{color:var(--text-secondary);margin-bottom:32px;font-size:13px}.login-card .form-group{margin-bottom:20px}.login-card label{color:var(--text);margin-bottom:6px;font-size:13px;font-weight:500;display:block}.login-card input{border:1px solid var(--border);border-radius:var(--radius);width:100%;transition:border var(--transition);padding:10px 14px;font-size:14px}.login-card input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);outline:none}.login-card .btn{width:100%;margin-top:8px}.btn{border-radius:var(--radius);cursor:pointer;transition:all var(--transition);border:none;align-items:center;gap:6px;padding:8px 20px;font-size:13px;font-weight:500;line-height:1.4;display:inline-flex}.btn:hover{opacity:.9}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-outline{border:1px solid var(--border);color:var(--text);background:0 0}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}.btn-danger{background:var(--danger);color:#fff}.btn-success{background:var(--success);color:#fff}.btn-sm{padding:5px 12px;font-size:12px}.btn-lg{padding:12px 28px;font-size:15px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.card-header{border-bottom:1px solid 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24px;display:flex}.timeline{padding-left:24px;position:relative}.timeline:before{content:"";background:var(--border);width:2px;position:absolute;top:4px;bottom:4px;left:7px}.timeline-item{margin-bottom:16px;position:relative}.timeline-item:before{content:"";background:var(--primary);width:8px;height:8px;box-shadow:var(--shadow-sm);border:2px solid #fff;border-radius:50%;position:absolute;top:6px;left:-20px}.timeline-item .time{color:var(--text-muted);font-size:11px}.timeline-item .loc{font-size:13px;font-weight:500}.timeline-item .note{color:var(--text-secondary);font-size:12px}.toast{border-radius:var(--radius);color:#fff;box-shadow:var(--shadow-md);z-index:2000;padding:12px 20px;font-size:13px;font-weight:500;animation:.3s slideIn;position:fixed;top:20px;right:20px}.toast-success{background:var(--success)}.toast-error{background:var(--danger)}.toast-info{background:var(--info)}@keyframes slideIn{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:translate(0)}}.empty-state{text-align:center;color:var(--text-muted);padding:60px 20px}.empty-state .icon{margin-bottom:12px;font-size:48px}.pagination{justify-content:center;align-items:center;gap:4px;margin-top:16px;display:flex}.pagination .page-btn{border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);background:#fff;padding:6px 12px;font-size:12px}.pagination .page-btn:hover{border-color:var(--primary);color:var(--primary)}.pagination .page-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);text-align:center;cursor:pointer;transition:all var(--transition);padding:32px}.upload-zone:hover{border-color:var(--primary);background:var(--primary-light)}.upload-zone .icon{margin-bottom:8px;font-size:36px}@media print{.sidebar,.topbar{display:none}.main-content{margin-left:0}.page-content{padding:0}}@media (width<=768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.page-content{padding:16px}.stats-grid,.form-grid{grid-template-columns:1fr}}