/* 后台管理样式 */
.admin-page {
    background: var(--bg);
    min-height: 100vh;
}
.admin-wrap {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}
.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
}
.admin-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 16px;
}
.admin-exit {
    font-size: 14px;
    color: var(--text-2);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: #fff;
    transition: .15s;
}
.admin-exit:hover {
    border-color: var(--primary);
    color: var(--primary);
}
.admin-main {
    flex: 1;
    padding: 32px 0;
}
.admin-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-sm);
}
.admin-title {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 8px;
}
.admin-lead {
    color: var(--text-2);
    font-size: 14px;
    margin-bottom: 24px;
}
.admin-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.admin-form .field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.admin-form label {
    font-size: 14px;
    font-weight: 600;
}
.admin-form input[type="text"],
.admin-form input[type="password"],
.admin-form input[type="url"] {
    height: 46px;
    padding: 0 14px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: var(--font);
    background: #fff;
}
.admin-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}
.admin-form .help {
    font-size: 12.5px;
    color: var(--text-3);
    margin: -2px 0 0;
}
.admin-form .actions {
    margin-top: 6px;
}
.admin-alert {
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    font-size: 14px;
    margin-bottom: 18px;
}
.admin-alert.error {
    background: var(--error-bg);
    color: var(--error);
}
.admin-alert.success {
    background: #E6F6F1;
    color: var(--success);
}
.admin-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
}
.admin-tab {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-2);
    background: transparent;
    border: 1px solid transparent;
    cursor: pointer;
}
.admin-tab.active {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary-light);
}
.admin-section {
    display: none;
}
.admin-section.active {
    display: block;
}
.admin-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}
.admin-switch {
    display: flex;
    align-items: center;
    gap: 10px;
}
.admin-switch input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}
.admin-footer {
    padding: 20px 0 28px;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 12px;
    color: var(--text-3);
    border-top: 1px solid var(--border);
}
.admin-nav {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}
.admin-nav a {
    font-size: 14px;
    color: var(--text-2);
    padding: 6px 10px;
}
.admin-nav a:hover {
    color: var(--primary);
}
@media (max-width: 640px) {
    .admin-row { grid-template-columns: 1fr; }
    .admin-header { flex-wrap: wrap; }
}

/* ===== 使用大盘 ===== */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 28px;
}
.stat-card {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 16px;
    text-align: center;
}
.stat-label {
    font-size: 13px;
    color: var(--text-3);
    margin-bottom: 8px;
}
.stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.1;
}
.section-subtitle {
    font-size: 15px;
    font-weight: 700;
    margin: 26px 0 14px;
}
.trend-chart {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    height: 160px;
    padding: 12px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow-x: auto;
}
.trend-col {
    flex: 1 0 auto;
    min-width: 26px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    height: 100%;
}
.trend-bar {
    width: 100%;
    max-width: 26px;
    background: var(--primary);
    border-radius: 4px 4px 0 0;
    min-height: 2px;
    transition: .2s;
}
.trend-num {
    font-size: 11px;
    color: var(--text-2);
    margin-top: 4px;
}
.trend-label {
    font-size: 10px;
    color: var(--text-3);
    margin-top: 2px;
}
.overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 8px;
}
.rank-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.rank-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}
.rank-no {
    width: 22px;
    height: 22px;
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
}
.rank-name {
    flex: 0 0 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.rank-bar-wrap {
    flex: 1;
    height: 10px;
    background: var(--surface-2);
    border-radius: 6px;
    overflow: hidden;
}
.rank-bar {
    display: block;
    height: 100%;
    background: var(--primary);
    border-radius: 6px;
}
.rank-count {
    flex: 0 0 auto;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}
.recent-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.recent-table th {
    text-align: left;
    color: var(--text-3);
    font-weight: 600;
    padding: 8px 6px;
    border-bottom: 1px solid var(--border);
}
.recent-table td {
    padding: 8px 6px;
    border-bottom: 1px solid var(--border);
}
.recent-table .nowrap { white-space: nowrap; }
.recent-table .muted { color: var(--text-3); word-break: break-all; }
.empty-hint {
    color: var(--text-3);
    font-size: 13px;
    padding: 14px 0;
}
.admin-note {
    margin-top: 24px;
    font-size: 12.5px;
    color: var(--text-3);
    line-height: 1.6;
    padding: 12px 14px;
    background: var(--surface-2);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}
@media (max-width: 640px) {
    .stat-cards { grid-template-columns: repeat(2, 1fr); }
    .overview-grid { grid-template-columns: 1fr; }
    .rank-name { flex-basis: 90px; }
}