:root {
    --color-primary: #1677ff;
    --color-primary-hover: #4096ff;
    --color-primary-active: #0958d9;
    --color-text: rgba(0, 0, 0, 0.88);
    --color-text-secondary: rgba(0, 0, 0, 0.65);
    --color-text-tertiary: rgba(0, 0, 0, 0.45);
    --color-border: #d9d9d9;
    --color-split: #f0f0f0;
    --color-bg: #f5f5f5;
    --color-bg-container: #ffffff;
    --color-bg-elevated: #fafafa;
    --color-error: #ff4d4f;
    --color-error-bg: #fff2f0;
    --color-error-border: #ffccc7;
    --border-radius: 6px;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
        "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
    --control-height: 32px;
    --shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.03), 0 1px 6px -1px rgba(0, 0, 0, 0.02),
        0 2px 4px 0 rgba(0, 0, 0, 0.02);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.5714285714285714;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

.layout {
    min-height: 100vh;
}

.page-header {
    background: var(--color-bg-container);
    border-bottom: 1px solid var(--color-split);
    padding: 16px 24px;
}

.page-header-title {
    font-size: 20px;
    font-weight: 600;
    line-height: 28px;
    color: var(--color-text);
}

.content {
    padding: 24px;
    max-width: 1600px;
    margin: 0 auto;
}

.card {
    background: var(--color-bg-container);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-split);
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

.stat-card {
    background: var(--color-bg-container);
    border: 1px solid var(--color-split);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 20px 24px;
}

.stat-title {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 22px;
    margin-bottom: 4px;
}

.stat-value {
    color: var(--color-text);
    font-size: 24px;
    font-weight: 600;
    line-height: 32px;
    font-variant-numeric: tabular-nums;
}

.search-form {
    padding: 24px 24px 8px;
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -12px;
}

.form-item {
    width: 25%;
    padding: 0 12px;
    margin-bottom: 16px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--color-text);
    font-size: 14px;
    height: 22px;
    line-height: 22px;
}

.input {
    width: 100%;
    height: var(--control-height);
    padding: 4px 11px;
    font-size: 14px;
    font-family: inherit;
    line-height: 1.5714285714285714;
    color: var(--color-text);
    background: var(--color-bg-container);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input::placeholder {
    color: var(--color-text-tertiary);
}

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

.input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(5, 145, 255, 0.1);
}

.range {
    display: flex;
    align-items: center;
    gap: 8px;
}

.range .input {
    flex: 1;
    min-width: 0;
}

.range .input[type="datetime-local"],
.range .input[type="date"] {
    min-width: 168px;
    padding-right: 8px;
}

.form-item-wide {
    width: 50%;
}

.range-sep {
    color: var(--color-text-tertiary);
    flex-shrink: 0;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: var(--control-height);
    padding: 4px 15px;
    font-size: 14px;
    font-family: inherit;
    line-height: 1.5714285714285714;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    background: var(--color-bg-container);
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    user-select: none;
}

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

.btn:active {
    color: var(--color-primary-active);
    border-color: var(--color-primary-active);
}

.btn-primary {
    color: #fff;
    background: var(--color-primary);
    border-color: var(--color-primary);
    box-shadow: 0 2px 0 rgba(5, 145, 255, 0.1);
}

.btn-primary:hover {
    color: #fff;
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.btn-primary:active {
    color: #fff;
    background: var(--color-primary-active);
    border-color: var(--color-primary-active);
}

.alert {
    padding: 8px 12px;
    border-radius: var(--border-radius);
    margin-bottom: 16px;
    border: 1px solid transparent;
}

.alert-error {
    background: var(--color-error-bg);
    border-color: var(--color-error-border);
    color: var(--color-error);
}

.table-card {
    padding-bottom: 0;
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    gap: 12px;
}

.toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.page-size {
    width: 110px;
    cursor: pointer;
}

.table-wrap {
    overflow: auto;
    border-top: 1px solid var(--color-split);
}

.table {
    width: 100%;
    min-width: 1180px;
    border-collapse: separate;
    border-spacing: 0;
    table-layout: auto;
}

.table th,
.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-split);
    text-align: center;
    font-size: 14px;
    line-height: 1.5714285714285714;
    vertical-align: middle;
}

.table th {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--color-bg-elevated);
    color: var(--color-text);
    font-weight: 600;
    white-space: nowrap;
}

.table tbody tr:hover > td {
    background: #fafafa;
}

.table .col-num {
    font-variant-numeric: tabular-nums;
}

.table .ellipsis {
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin: 0 auto;
}

.table .device {
    max-width: 220px;
}

.table .empty {
    text-align: center;
    color: var(--color-text-tertiary);
    padding: 48px 16px !important;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 16px;
    padding: 16px 24px;
}

.pagination-total {
    color: var(--color-text-secondary);
    font-size: 14px;
}

.pagination-list {
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-item {
    min-width: 32px;
    height: 32px;
    padding: 0 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg-container);
    color: var(--color-text);
    font-size: 14px;
    line-height: 1;
    transition: all 0.2s;
}

.page-item:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.page-item.active {
    color: #fff;
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.page-item.active:hover {
    color: #fff;
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.page-item.disabled {
    color: rgba(0, 0, 0, 0.25);
    background: var(--color-bg-container);
    border-color: var(--color-border);
    cursor: not-allowed;
    pointer-events: none;
}

.page-item.ellipsis-item {
    border: none;
    background: transparent;
    cursor: default;
    color: var(--color-text-tertiary);
}

.page-item.ellipsis-item:hover {
    color: var(--color-text-tertiary);
    border: none;
}

@media (max-width: 1400px) {
    .stats-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 1200px) {
    .form-item,
    .form-item-wide {
        width: 50%;
    }

    .stats-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .form-item,
    .form-item-wide {
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .content {
        padding: 16px;
    }

    .page-header {
        padding: 12px 16px;
    }
}

@media (max-width: 576px) {
    .form-item,
    .form-item-wide {
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .range {
        flex-direction: column;
        align-items: stretch;
    }

    .range-sep {
        text-align: center;
    }

    .range .input[type="datetime-local"],
    .range .input[type="date"] {
        min-width: 0;
    }

    .pagination {
        justify-content: center;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .toolbar-right {
        margin-left: 0;
        justify-content: flex-end;
    }
}