:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --info: #0891b2;
    --dark: #1e293b;
    --gray: #64748b;
    --light: #f1f5f9;
    --border: #e2e8f0;
    --bg: #f8fafc;
    --card-shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --card-shadow-hover: 0 4px 12px rgba(0,0,0,.1), 0 2px 4px rgba(0,0,0,.06);
}

* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; background: var(--bg); }

/* 登录/注册页 */
.auth-body { background: linear-gradient(135deg, #1e3a5f 0%, #0f172a 100%); min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.auth-wrapper { width: 100%; display: flex; align-items: center; justify-content: center; padding: 20px; }
.auth-card { background: #fff; border-radius: 16px; box-shadow: 0 20px 60px rgba(0,0,0,.3); width: 100%; max-width: 440px; overflow: hidden; }
.auth-header { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; padding: 40px 30px; text-align: center; }
.auth-header h1 { font-size: 22px; margin: 8px 0 4px; font-weight: 700; }
.auth-header .icon { font-size: 42px; }
.auth-header p { margin: 0; opacity: .85; font-size: 14px; }
.auth-body-content { padding: 32px 30px; }
.auth-body-content .form-control { border-radius: 10px; padding: 12px 14px; border: 2px solid var(--border); transition: border .2s; }
.auth-body-content .form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.btn-primary-auth { width: 100%; padding: 12px; border: none; border-radius: 10px; background: var(--primary); color: #fff; font-size: 16px; font-weight: 600; cursor: pointer; transition: all .2s; }
.btn-primary-auth:hover { background: var(--primary-dark); transform: translateY(-1px); }
.auth-info { margin-top: 20px; padding: 14px; background: var(--light); border-radius: 10px; font-size: 13px; color: var(--gray); }
.auth-info ul { margin: 6px 0 0; padding-left: 18px; }
.auth-footer { text-align: center; padding: 16px 30px; border-top: 1px solid var(--border); font-size: 13px; color: var(--gray); }

/* 应用主体 */
.app-body { background: var(--bg); }
.app-navbar { background: #fff; border-bottom: 1px solid var(--border); box-shadow: 0 1px 3px rgba(0,0,0,.05); }
.app-navbar .navbar-brand { color: var(--dark); }
.app-navbar .navbar-brand i { font-size: 24px; }
.app-navbar .nav-link { color: var(--gray); font-weight: 500; padding: 8px 14px; border-radius: 8px; transition: all .15s; }
.app-navbar .nav-link:hover, .app-navbar .nav-link.active { color: var(--primary); background: var(--primary-light); }
.app-content { padding: 24px; max-width: 1400px; margin: 0 auto; }

/* 卡片 */
.card { border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--card-shadow); background: #fff; }
.card-header { background: #fff; border-bottom: 1px solid var(--border); padding: 16px 20px; font-weight: 600; }
.card-body { padding: 20px; }

/* 统计卡片 */
.stat-card { display: flex; align-items: center; gap: 16px; padding: 20px; border-radius: 12px; background: #fff; border: 1px solid var(--border); box-shadow: var(--card-shadow); transition: all .2s; }
.stat-card:hover { box-shadow: var(--card-shadow-hover); transform: translateY(-2px); }
.stat-card .stat-icon { width: 52px; height: 52px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 24px; }
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--dark); line-height: 1; }
.stat-card .stat-label { font-size: 13px; color: var(--gray); margin-top: 4px; }

/* 物流轨迹 */
.tracking-timeline { list-style: none; padding: 0; margin: 0; }
.tracking-timeline li { position: relative; padding: 0 0 24px 28px; }
.tracking-timeline li::before { content: ''; position: absolute; left: 6px; top: 6px; bottom: 0; width: 2px; background: var(--border); }
.tracking-timeline li::after { content: ''; position: absolute; left: 0; top: 4px; width: 14px; height: 14px; border-radius: 50%; background: var(--primary); border: 3px solid var(--primary-light); }
.tracking-timeline li:last-child::before { display: none; }
.tracking-timeline li:first-child::after { background: var(--success); border-color: #d1fae5; }
.tracking-timeline .time { font-size: 12px; color: var(--gray); }
.tracking-timeline .desc { font-size: 14px; color: var(--dark); margin: 2px 0; }
.tracking-timeline .location { font-size: 13px; color: var(--gray); }
.tracking-timeline .location i { margin-right: 4px; }

/* 徽章 */
.badge-status { padding: 4px 10px; border-radius: 6px; font-size: 12px; font-weight: 600; }
.badge-delivered { background: #d1fae5; color: #065f46; }
.badge-transit { background: #dbeafe; color: #1e40af; }
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-exception { background: #fee2e2; color: #991b1b; }
.badge-unknown { background: var(--light); color: var(--gray); }

/* 表格 */
.table-hover tbody tr:hover { background: var(--light); }
.table th { font-size: 13px; color: var(--gray); font-weight: 600; text-transform: uppercase; letter-spacing: .5px; border-bottom: 2px solid var(--border); }
.table td { vertical-align: middle; }

/* 运维仪表盘 */
.ops-metric { text-align: center; padding: 20px; }
.ops-metric .value { font-size: 32px; font-weight: 700; }
.ops-metric .label { font-size: 13px; color: var(--gray); margin-top: 4px; }
.ops-metric .icon { font-size: 20px; margin-bottom: 8px; }

.chart-container { position: relative; height: 280px; }

/* 加载动画 */
.loading-spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin .6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* 搜索框 */
.search-box { position: relative; }
.search-box i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--gray); }
.search-box input { padding-left: 40px; }

/* 文件上传区域 */
.upload-zone { border: 2px dashed var(--border); border-radius: 12px; padding: 40px; text-align: center; cursor: pointer; transition: all .2s; }
.upload-zone:hover { border-color: var(--primary); background: var(--primary-light); }
.upload-zone.dragover { border-color: var(--primary); background: var(--primary-light); }
.upload-zone i { font-size: 42px; color: var(--gray); }
.upload-zone p { margin: 8px 0 0; color: var(--gray); }

/* 响应式 */
@media (max-width: 768px) {
    .app-content { padding: 12px; }
    .stat-card { padding: 14px; }
    .stat-card .stat-value { font-size: 22px; }
    .stat-card .stat-icon { width: 40px; height: 40px; font-size: 18px; }
}

/* Toast 提示 */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; }
.toast-item { background: #fff; border-left: 4px solid var(--primary); border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,.15); padding: 14px 20px; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; animation: slideIn .3s ease; }
.toast-item.success { border-left-color: var(--success); }
.toast-item.error { border-left-color: var(--danger); }
.toast-item.warning { border-left-color: var(--warning); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }