/* ===== 全局重置 ===== */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;background:#f0f2f5;color:#333;min-height:100vh}
a{color:#1677ff;text-decoration:none}

/* ===== 登录页面 ===== */
#login-page{position:fixed;top:0;left:0;width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0c1445 0%,#1a3a6b 50%,#2980b9 100%);z-index:1000}
.login-box{background:rgba(255,255,255,.95);border-radius:16px;padding:40px;width:380px;max-width:90vw;box-shadow:0 20px 60px rgba(0,0,0,.3);backdrop-filter:blur(10px)}
.login-title{font-size:26px;font-weight:700;text-align:center;margin-bottom:6px;background:linear-gradient(135deg,#1677ff,#2980b9);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.login-subtitle{font-size:13px;color:#888;text-align:center;margin-bottom:30px}
.login-input{margin-bottom:16px}
.login-input input{width:100%;height:44px;padding:0 14px;border:1px solid #d9d9d9;border-radius:8px;font-size:15px;outline:none;transition:border-color .2s,box-shadow .2s;box-sizing:border-box}
.login-input input:focus{border-color:#1677ff;box-shadow:0 0 0 2px rgba(22,119,255,.15)}
.login-error{color:#cf1322;font-size:13px;margin-bottom:12px;display:none;text-align:center}
.login-btn{width:100%;height:44px;border:none;border-radius:8px;background:linear-gradient(135deg,#1677ff,#4096ff);color:#fff;font-size:16px;font-weight:600;cursor:pointer;transition:opacity .2s;margin-top:4px}
.login-btn:hover{opacity:.9}
.login-btn:disabled{opacity:.6;cursor:not-allowed}

/* ===== 顶部导航 ===== */
.header{background:#fff;border-bottom:1px solid #e8e8e8;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:57px;position:sticky;top:0;z-index:100}
.header-left{display:flex;align-items:center;gap:4px}
.logo{font-size:17px;font-weight:700;color:#1677ff;margin-right:16px;white-space:nowrap}
.nav{display:flex;gap:0}
.nav-btn{padding:0 20px;height:56px;border:none;background:transparent;cursor:pointer;font-size:14px;color:#555;border-bottom:2px solid transparent;transition:all .2s;white-space:nowrap}
.nav-btn.active{color:#1677ff;border-bottom-color:#1677ff;font-weight:600}
.nav-btn:hover{color:#1677ff}
.nav-btn.hidden{display:none}

/* ===== 下拉导航 ===== */
.nav-dropdown{position:relative}
.nav-dropdown-menu{display:none;position:absolute;top:56px;left:0;background:#fff;border-radius:0 0 8px 8px;box-shadow:0 4px 12px rgba(0,0,0,.1);min-width:140px;z-index:200;padding:4px 0}
.nav-dropdown:hover .nav-dropdown-menu{display:block}
.nav-dropdown:hover>.nav-btn{color:#1677ff;border-bottom-color:#1677ff}
.nav-dropdown-item{display:block;width:100%;padding:10px 20px;border:none;background:transparent;cursor:pointer;font-size:13px;color:#555;text-align:left;transition:all .15s;white-space:nowrap}
.nav-dropdown-item:hover{background:#e6f4ff;color:#1677ff}
.nav-dropdown-item.active{color:#1677ff;font-weight:600;background:#f0f7ff}
.nav-dropdown-item.hidden{display:none}
.header-right{display:flex;align-items:center;gap:8px}
.user-avatar{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,#1677ff,#4096ff);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600}
.user-name{font-size:14px;font-weight:500;color:#333}
.user-role-tag{font-size:11px;padding:2px 8px;border-radius:10px;background:#e6f4ff;color:#1677ff;font-weight:500}
.btn-logout{padding:5px 12px;border:1px solid #d9d9d9;border-radius:6px;background:#fff;cursor:pointer;font-size:13px;color:#555;transition:all .2s;line-height:1.4}
.btn-logout:hover{border-color:#1677ff;color:#1677ff}

/* ===== 页面容器 ===== */
#page-container{padding:20px}
.page{display:none}
.page.active{display:block}
.container{max-width:1400px;margin:0 auto}

/* ===== 卡片 ===== */
.card{background:#fff;border-radius:12px;padding:20px;margin-bottom:16px;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.card-title{font-size:15px;font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;flex-shrink:0}

/* ===== 指标卡片 ===== */
.kpi-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:16px}
.kpi-card{background:#fff;border-radius:10px;padding:18px 20px;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.kpi-label{font-size:12px;color:#888;margin-bottom:4px}
.kpi-value{font-size:28px;font-weight:700;color:#333}
.kpi-value.blue{color:#1677ff}
.kpi-value.green{color:#52c41a}
.kpi-value.orange{color:#fa8c16}
.kpi-value.purple{color:#722ed1}

/* ===== 图表行 ===== */
.chart-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
@media(max-width:900px){.chart-row{grid-template-columns:1fr}}
.chart-box{background:#fff;border-radius:10px;padding:16px;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.chart-box .card-title{margin-bottom:10px}
.chart-wrap{position:relative;height:260px}
.chart-legend{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px;font-size:12px}
.legend-item{display:flex;align-items:center;gap:4px;color:#666}
.legend-dot{width:10px;height:10px;border-radius:3px;display:inline-block}

/* ===== 表格 ===== */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
th{background:#fafafa;padding:10px 12px;text-align:left;font-weight:600;color:#555;border-bottom:2px solid #e8e8e8;white-space:nowrap}
td{padding:9px 12px;border-bottom:1px solid #f0f0f0;color:#333}
tr:hover td{background:#fafafa}

/* ===== 标签 ===== */
.tag{display:inline-block;padding:2px 8px;border-radius:4px;font-size:12px;color:#fff;background:#1677ff;white-space:nowrap}
.plate{font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-weight:500}
.status-badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:12px;font-weight:500}
.status-active{background:#f6ffed;color:#389e0d;border:1px solid #b7eb8f}
.status-inactive{background:#fff2f0;color:#cf1322;border:1px solid #ffccc7}

/* ===== 状态指示 ===== */
.conn-status{display:inline-block;padding:4px 10px;border-radius:6px;font-size:12px;border:1px solid;background:#f6ffed;color:#389e0d;border-color:#b7eb8f}
.error-banner{background:#fff2f0;border:1px solid #ffccc7;color:#cf1322;padding:10px 20px;font-size:13px;margin:0 20px;border-radius:6px}

/* ===== 工具栏 ===== */
.veh-toolbar{display:flex;gap:8px;align-items:center;margin-bottom:12px;flex-wrap:wrap}
.user-toolbar,.user-form{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.veh-toolbar input,.user-toolbar input{height:34px;padding:0 10px;border:1px solid #d9d9d9;border-radius:6px;font-size:13px;outline:none;box-sizing:border-box}
.veh-toolbar input:focus,.user-toolbar input:focus{border-color:#1677ff;box-shadow:0 0 0 2px rgba(22,119,255,.1)}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:4px 14px;height:32px;border:1px solid #d9d9d9;border-radius:6px;background:#fff;cursor:pointer;font-size:13px;color:#555;transition:all .2s;white-space:nowrap}
.btn:hover{border-color:#1677ff;color:#1677ff}
.btn-primary{background:#1677ff;color:#fff;border-color:#1677ff}
.btn-primary:hover{background:#4096ff;border-color:#4096ff;color:#fff}
.btn-primary:disabled{opacity:.6;cursor:not-allowed}
.btn-danger{color:#cf1322;border-color:#ffccc7}
.btn-danger:hover{background:#fff2f0;border-color:#cf1322;color:#cf1322}

/* ===== 分页 ===== */
.pagination{display:flex;align-items:center;gap:4px;margin-top:12px;flex-wrap:wrap}
.pg-btn{padding:4px 10px;height:30px;border:1px solid #d9d9d9;border-radius:4px;background:#fff;cursor:pointer;font-size:12px;color:#555;transition:all .2s}
.pg-btn:hover{border-color:#1677ff;color:#1677ff}
.pg-btn.active{background:#1677ff;color:#fff;border-color:#1677ff}
.pg-btn:disabled{color:#ccc;cursor:not-allowed;border-color:#e8e8e8}
.pg-info{font-size:12px;color:#888;margin-right:8px}

/* ===== 弹窗 ===== */
#pwd-overlay,#ch-dialog-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.45);z-index:999;align-items:center;justify-content:center}
.modal-content{background:#fff;border-radius:12px;padding:28px;max-width:90vw;box-shadow:0 8px 30px rgba(0,0,0,.2)}