/* ===== 全局重置与变量 ===== */
:root {
    --color-high: #dc2626;
    --color-high-bg: #fef2f2;
    --color-medium: #f59e0b;
    --color-medium-bg: #fffbeb;
    --color-low: #eab308;
    --color-low-bg: #fefce8;
    --color-none: #9ca3af;
    --color-none-bg: #f3f4f6;
    --color-resolved: #22c55e;
    --color-resolved-bg: #f0fdf4;
    --color-active: #3b82f6;
    --color-active-bg: #eff6ff;
    --color-primary: #4f46e5;
    --color-primary-light: #6366f1;
    --color-bg: #f8fafc;
    --color-card: #ffffff;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --radius: 10px;
    --radius-sm: 6px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
    line-height: 1.6;
}

/* ===== 登录页 ===== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 20px;
    padding: 48px 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.login-logo {
    font-size: 56px;
    margin-bottom: 12px;
}

.login-card h1 {
    font-size: 22px;
    color: var(--color-text);
    font-weight: 700;
}

.login-subtitle {
    color: var(--color-text-light);
    font-size: 15px;
    margin: 8px 0 32px;
}

.login-form .form-group {
    margin-bottom: 18px;
    text-align: left;
}

.login-form label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: 6px;
}

.login-form input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    transition: border-color 0.2s;
    outline: none;
}

.login-form input:focus {
    border-color: var(--color-primary);
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-login:hover {
    background: var(--color-primary-light);
}

.login-hint {
    margin-top: 20px;
    font-size: 12px;
    color: var(--color-text-light);
}

/* ===== 主应用框架 ===== */
.app-main {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    background: white;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 60px;
    position: sticky;
    top: 0;
    z-index: 100;
    gap: 24px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-left .logo {
    font-size: 24px;
}

.header-left .title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
    white-space: nowrap;
}

.header-nav {
    display: flex;
    gap: 4px;
    flex: 1;
    justify-content: center;
}

.nav-item {
    padding: 8px 18px;
    text-decoration: none;
    color: var(--color-text-light);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    position: relative;
}

.nav-item:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.nav-item.active {
    background: var(--color-primary);
    color: white;
}

.alert-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    background: var(--color-high);
    color: white;
    font-size: 11px;
    min-width: 18px;
    height: 18px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    padding: 0 4px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-info {
    font-size: 13px;
    color: var(--color-text-light);
}

.btn-logout {
    padding: 6px 14px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    color: var(--color-text-light);
    transition: all 0.2s;
}

.btn-logout:hover {
    background: var(--color-high-bg);
    border-color: var(--color-high);
    color: var(--color-high);
}

/* 移动端标题默认隐藏 */
.title-mobile {
    display: none;
}

/* 移动端汉堡菜单按钮（默认隐藏） */
.mobile-menu-btn {
    display: none;
}

/* ===== 移动端抽屉导航 ===== */
.mobile-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    max-width: 80vw;
    height: 100vh;
    background: white;
    box-shadow: -4px 0 20px rgba(0,0,0,0.15);
    z-index: 1100;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

.mobile-nav.open {
    transform: translateX(0);
}

.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(2px);
    z-index: 1099;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-nav-overlay.open {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
}

.mobile-nav-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
}

.mobile-nav-close {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--color-text-light);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.mobile-nav-user {
    padding: 16px 20px;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-user-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
}

.mobile-nav-menu {
    flex: 1;
    padding: 12px 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mobile-nav-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    text-decoration: none;
    color: var(--color-text);
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    position: relative;
}

.mobile-nav-item:hover {
    background: var(--color-bg);
}

.mobile-nav-item.active {
    background: var(--color-primary);
    color: white;
}

.mobile-nav-item .alert-badge {
    position: static;
    transform: none;
}

.mobile-nav-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--color-border);
}

/* ===== 报警横幅 ===== */
.alert-banner {
    background: linear-gradient(90deg, var(--color-high) 0%, #ea580c 100%);
    color: white;
    padding: 10px 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { transform: translateY(-100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.alert-banner .alert-icon {
    font-size: 18px;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.alert-banner-close {
    margin-left: auto;
    background: none;
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    opacity: 0.7;
}

.alert-banner-close:hover {
    opacity: 1;
}

/* ===== 内容区 ===== */
.app-content {
    flex: 1;
    padding: 24px;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.page-header h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
}

.page-desc {
    font-size: 13px;
    color: var(--color-text-light);
    margin-left: 12px;
}

.page-actions {
    display: flex;
    gap: 10px;
}

/* ===== 统计卡片 ===== */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 24px 20px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.stat-card.stat-total { border-left-color: var(--color-primary); }
.stat-card.stat-high { border-left-color: var(--color-high); }
.stat-card.stat-medium { border-left-color: var(--color-medium); }
.stat-card.stat-low { border-left-color: var(--color-low); }
.stat-card.stat-resolved { border-left-color: var(--color-resolved); }

.stat-value {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.2;
}

.stat-card.stat-total .stat-value { color: var(--color-primary); }
.stat-card.stat-high .stat-value { color: var(--color-high); }
.stat-card.stat-medium .stat-value { color: var(--color-medium); }
.stat-card.stat-low .stat-value { color: var(--color-low); }
.stat-card.stat-resolved .stat-value { color: var(--color-resolved); }

.stat-label {
    font-size: 13px;
    color: var(--color-text-light);
    margin-top: 4px;
}

/* ===== 图表区 ===== */
.chart-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.chart-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.chart-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
}

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

.chart-container-lg {
    position: relative;
    height: 360px;
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

/* ===== 筛选栏 ===== */
.filter-bar {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.filter-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-light);
}

.filter-group select,
.filter-group input {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    outline: none;
    min-width: 140px;
    background: white;
}

.filter-group select:focus,
.filter-group input:focus {
    border-color: var(--color-primary);
}

/* ===== 表格 ===== */
.table-wrapper {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: auto;
}

.risk-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.risk-table thead th {
    background: #f1f5f9;
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--color-text-light);
    white-space: nowrap;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
}

.risk-table tbody tr {
    border-bottom: 1px solid #f1f5f9;
    transition: background 0.15s;
}

.risk-table tbody tr:hover {
    background: #f8fafc;
}

.risk-table td {
    padding: 12px 16px;
    vertical-align: middle;
}

.risk-table .col-id {
    font-weight: 600;
    color: var(--color-text-light);
    white-space: nowrap;
}

.risk-table .col-class {
    white-space: nowrap;
    font-weight: 600;
}

.risk-table .col-name {
    white-space: nowrap;
    font-weight: 600;
}

.risk-table .col-desc {
    max-width: 320px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--color-text-light);
}

.risk-table .col-desc:hover {
    white-space: normal;
    overflow: visible;
}

.risk-table .col-time {
    white-space: nowrap;
    color: var(--color-text-light);
    font-size: 12px;
}

/* 风险等级标签 */
.level-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.level-tag.high { background: var(--color-high-bg); color: var(--color-high); }
.level-tag.medium { background: var(--color-medium-bg); color: var(--color-medium); }
.level-tag.low { background: var(--color-low-bg); color: var(--color-low); }
.level-tag.none { background: var(--color-none-bg); color: var(--color-none); }

.level-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.level-dot.high { background: var(--color-high); }
.level-dot.medium { background: var(--color-medium); }
.level-dot.low { background: var(--color-low); }
.level-dot.none { background: var(--color-none); }

/* 状态标签 */
.status-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.status-tag.active { background: var(--color-active-bg); color: var(--color-active); }
.status-tag.monitoring { background: #f0f9ff; color: #0284c7; }
.status-tag.resolved { background: var(--color-resolved-bg); color: var(--color-resolved); }

/* 操作按钮 */
.action-btn {
    padding: 4px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: white;
    cursor: pointer;
    font-size: 12px;
    color: var(--color-text-light);
    transition: all 0.2s;
    margin-right: 4px;
}

.action-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-active-bg);
}

.action-btn.resolve-btn:hover {
    border-color: var(--color-resolved);
    color: var(--color-resolved);
    background: var(--color-resolved-bg);
}

/* 删除按钮（危险操作，红色提示） */
.action-btn.delete-btn {
    color: #dc2626;
    border-color: #fecaca;
}

.action-btn.delete-btn:hover {
    border-color: #dc2626;
    color: white;
    background: #dc2626;
}

.table-empty {
    text-align: center;
    padding: 48px;
    color: var(--color-text-light);
}

/* ===== 报警中心 ===== */
.alert-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.alert-item {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.alert-item.high { border-left-color: var(--color-high); }
.alert-item.medium { border-left-color: var(--color-medium); }

.alert-icon-lg {
    font-size: 32px;
    flex-shrink: 0;
}

.alert-content {
    flex: 1;
}

.alert-content h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.alert-content .alert-meta {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.alert-content p {
    font-size: 13px;
    color: var(--color-text);
    line-height: 1.6;
}

.alert-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

/* ===== 分析报告 ===== */
.analysis-section {
    margin-bottom: 32px;
}

.analysis-section h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
    padding-left: 12px;
    border-left: 4px solid var(--color-primary);
}

.hotspot-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}

.hotspot-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 16px 20px;
    box-shadow: var(--shadow-sm);
    border-left: 3px solid var(--color-primary);
}

.hotspot-card .hotspot-name {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.hotspot-card .hotspot-count {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.hotspot-card .hotspot-desc {
    font-size: 12px;
    color: var(--color-text-light);
    margin-top: 4px;
}

.warning-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.warning-item {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
}

.warning-item .warning-icon {
    font-size: 18px;
    flex-shrink: 0;
}

.warning-item .warning-text {
    flex: 1;
    line-height: 1.6;
}

.warning-item .warning-text strong {
    color: var(--color-medium);
}

/* ===== 弹窗 ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(2px);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    z-index: 1;
}

.modal-lg {
    width: 90%;
    max-width: 760px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.modal-header h3 {
    font-size: 17px;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--color-text-light);
    padding: 0;
    line-height: 1;
}

.modal-close:hover {
    color: var(--color-high);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

/* ===== 详情视图 ===== */
.detail-section {
    margin-bottom: 24px;
}

.detail-section h4 {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-text-light);
    text-transform: uppercase;
    margin-bottom: 8px;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--color-border);
}

.detail-content {
    font-size: 14px;
    line-height: 1.8;
    color: var(--color-text);
}

.detail-meta {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.detail-meta-item {
    background: #f8fafc;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
}

.detail-meta-item label {
    font-size: 11px;
    color: var(--color-text-light);
    font-weight: 600;
    text-transform: uppercase;
    display: block;
    margin-bottom: 4px;
}

.detail-meta-item value {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    display: block;
}

/* 历史时间线 */
.timeline {
    position: relative;
    padding-left: 28px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 4px;
    bottom: 4px;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 20px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 2px solid white;
    box-shadow: 0 0 0 2px var(--color-border);
}

.timeline-item.resolved::before {
    background: var(--color-resolved);
}

.timeline-item .timeline-time {
    font-size: 12px;
    color: var(--color-text-light);
    margin-bottom: 2px;
}

.timeline-item .timeline-action {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
}

.timeline-item .timeline-desc {
    font-size: 13px;
    color: var(--color-text-light);
    margin-top: 2px;
}

/* ===== 表单 ===== */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    margin-bottom: 14px;
}

.form-group.full {
    grid-column: 1 / -1;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.form-group label::after {
    content: '';
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    outline: none;
    transition: border-color 0.2s;
    font-family: inherit;
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
}

.form-group textarea {
    resize: vertical;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.btn-primary {
    padding: 9px 22px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: var(--color-primary-light);
}

.btn-secondary {
    padding: 9px 22px;
    background: white;
    color: var(--color-text-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: var(--color-bg);
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    background: #1e293b;
    color: white;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    z-index: 2000;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease;
}

@keyframes toastIn {
    from { transform: translate(-50%, 100%); opacity: 0; }
    to { transform: translate(-50%, 0); opacity: 1; }
}

.toast.success { background: #059669; }
.toast.error { background: var(--color-high); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .stat-cards {
        grid-template-columns: repeat(3, 1fr);
    }
    .chart-row {
        grid-template-columns: 1fr;
    }
    .header-nav {
        gap: 2px;
    }
    .nav-item {
        padding: 6px 10px;
        font-size: 13px;
    }
    .header-left .title {
        font-size: 14px;
    }
}

/* ===== 角色徽章 ===== */
.role-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    line-height: 1.6;
}

.role-admin { background: #4f46e5; color: white; }
.role-grade_leader { background: #0ea5e9; color: white; }
.role-teacher { background: #8b5cf6; color: white; }
.role-system { background: #64748b; color: white; }

/* ===== 服务器同步状态 ===== */
.sync-status {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.sync-status.synced { background: #f0fdf4; color: #16a34a; }
.sync-status.syncing { background: #fffbeb; color: #d97706; }

/* ===== 系统设置页 ===== */
.settings-section {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

.settings-section h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}

.settings-tip {
    font-size: 12px;
    color: var(--color-text-light);
    margin-bottom: 16px;
}

.settings-note {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 13px;
    color: #92400e;
    margin-bottom: 12px;
}

/* 班级 chip 列表 */
.chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.chip-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 6px 8px 6px 14px;
}

.chip-item .chip-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
}

.chip-item .chip-grade {
    font-size: 11px;
    color: var(--color-text-light);
    background: white;
    border: 1px solid var(--color-border);
    padding: 1px 8px;
    border-radius: 8px;
}

.chip-item .action-btn {
    padding: 2px 8px;
    font-size: 11px;
    margin-right: 0;
}

.settings-add-row {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.settings-add-row input {
    padding: 9px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    outline: none;
    flex: 1;
    min-width: 200px;
    max-width: 320px;
    background: white;
}

.settings-add-row input:focus {
    border-color: var(--color-primary);
}

/* 年级组卡片 */
.grade-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.grade-card {
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
}

.grade-card.editing {
    border-color: var(--color-primary);
    background: var(--color-active-bg);
}

.grade-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.grade-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text);
}

.grade-count {
    font-size: 12px;
    color: var(--color-text-light);
    background: white;
    border: 1px solid var(--color-border);
    padding: 1px 8px;
    border-radius: 8px;
}

.grade-actions {
    margin-left: auto;
    display: flex;
    gap: 4px;
}

.grade-members {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.mini-chip {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: #eef2ff;
    border: 1px solid #e0e7ff;
    padding: 2px 10px;
    border-radius: 10px;
}

.grade-edit-row input {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    outline: none;
    margin-bottom: 10px;
    background: white;
}

.grade-edit-row input:focus {
    border-color: var(--color-primary);
}

.grade-checks {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.grade-check {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--color-text);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 5px 12px;
    cursor: pointer;
    transition: all 0.15s;
}

.grade-check:hover {
    border-color: var(--color-primary);
}

.grade-check input[type="checkbox"] {
    accent-color: var(--color-primary);
}

.grade-edit-actions {
    display: flex;
    gap: 8px;
}

/* 账号管理 */
.user-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.user-row {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    flex-wrap: wrap;
}

.user-row .user-main {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 140px;
}

.user-row .user-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.user-row .user-acc {
    font-size: 12px;
    color: var(--color-text-light);
    font-family: Consolas, Menlo, monospace;
    min-width: 90px;
}

.user-row .user-scope {
    font-size: 12px;
    color: var(--color-text-light);
    flex: 1;
    min-width: 120px;
}

.user-row .user-actions {
    display: flex;
    gap: 4px;
}

.user-form {
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 16px;
}

.user-form-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.user-form-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.scope-checks {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}

.scope-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: 6px;
    width: 100%;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .user-form-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .stat-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .stat-card {
        padding: 16px 12px;
    }
    .stat-value {
        font-size: 24px;
    }
    .stat-label {
        font-size: 12px;
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
    .detail-meta {
        grid-template-columns: 1fr;
    }
    .filter-bar {
        flex-direction: column;
        gap: 12px;
        padding: 14px 16px;
    }
    .filter-group {
        width: 100%;
    }
    .filter-group select,
    .filter-group input {
        width: 100%;
        min-width: unset;
    }
    .header-left .title {
        display: none;
    }
    .header-left .title-mobile {
        display: inline;
        font-size: 15px;
        font-weight: 700;
        color: var(--color-text);
    }
    .app-content {
        padding: 12px;
    }
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        margin-bottom: 16px;
    }
    .page-desc {
        margin-left: 0;
    }
    .risk-table {
        font-size: 12px;
    }
    .risk-table th,
    .risk-table td {
        padding: 10px 12px;
    }
    .risk-table .col-desc {
        max-width: 120px;
    }
    .user-form-grid {
        grid-template-columns: 1fr;
    }
    .user-row {
        flex-direction: column;
        align-items: flex-start;
    }
    .user-row .user-actions {
        width: 100%;
        justify-content: flex-end;
    }
    .header-nav {
        display: none;
    }
    .header-right {
        display: none;
    }
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: var(--color-bg);
        border: none;
        border-radius: var(--radius-sm);
        font-size: 20px;
        color: var(--color-text);
        cursor: pointer;
        margin-left: auto;
    }
    .app-header {
        padding: 0 14px;
        height: 56px;
        gap: 12px;
    }
    .chart-row {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 16px;
    }
    .chart-card {
        padding: 16px;
    }
    .chart-container {
        height: 220px;
    }
    .chart-container-lg {
        height: 280px;
        padding: 16px;
    }
    .modal-lg {
        width: 95%;
        max-width: none;
    }
    .modal-body {
        padding: 16px;
    }
    .form-actions {
        flex-direction: column-reverse;
        gap: 8px;
    }
    .form-actions button {
        width: 100%;
    }
    .btn-primary,
    .btn-secondary {
        padding: 11px 22px;
    }
    .alert-banner {
        padding: 10px 14px;
        font-size: 13px;
        line-height: 1.5;
    }
    .analysis-section h3 {
        font-size: 15px;
    }
    .settings-section {
        padding: 16px;
    }
    .hotspot-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stat-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    .title-mobile {
        max-width: 120px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
}