/**
 * SMS_Lite 核心样式表
 * 纯原生 CSS，无外部框架或 Node/npm 依赖
 * 遵循现代、轻量、高对比度与移动端响应式设计
 */

:root {
    color-scheme: light;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

    /* 页面背景与容器 */
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --bg-elevated: #ffffff;
    --bg-input: #ffffff;
    --bg-hover: #f1f5f9;

    /* 文字色阶 */
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --text-title: #334155;

    /* 边框色 */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;

    /* 品牌主色与辅色 */
    --color-primary: #0f172a;
    --color-primary-hover: #1e293b;
    --color-accent: #3b82f6;

    /* 导航交互 */
    --nav-hover-bg: #e2e8f0;
    --nav-active-bg: #0f172a;
    --nav-active-text: #ffffff;

    /* 表格背景 */
    --table-th-bg: #f8fafc;
    --table-hover-bg: #f8fafc;
    --modal-footer-bg: #f8fafc;

    /* 线框按钮 */
    --btn-outline-bg: #ffffff;
    --btn-outline-border: #e2e8f0;
    --btn-outline-hover: #f1f5f9;

    /* 语义化色彩 */
    --color-success: #10b981;
    --color-success-bg: #ecfdf5;
    --color-success-border: #a7f3d0;

    --color-warning: #f59e0b;
    --color-warning-bg: #fffbeb;
    --color-warning-border: #fde68a;

    --color-danger: #ef4444;
    --color-danger-bg: #fef2f2;
    --color-danger-border: #fecaca;

    --color-info: #0284c7;
    --color-info-bg: #f0f9ff;
    --color-info-border: #bae6fd;

    /* 圆角与阴影 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.08);
}

html[data-theme="dark"] {
    color-scheme: dark;

    /* 深色背景阶梯 */
    --bg-body: #0f172a;
    --bg-card: #111827;
    --bg-elevated: #1e293b;
    --bg-input: #111827;
    --bg-hover: #1e293b;

    /* 深色文字 */
    --text-main: #e5e7eb;
    --text-muted: #94a3b8;
    --text-light: #64748b;
    --text-title: #cbd5e1;

    /* 深色边框 */
    --border-color: #334155;
    --border-light: #1e293b;

    /* 品牌主色在深色下保持清晰对比度 */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-accent: #60a5fa;

    /* 导航交互 */
    --nav-hover-bg: #1e293b;
    --nav-active-bg: #2563eb;
    --nav-active-text: #ffffff;

    /* 表格与弹窗 */
    --table-th-bg: #1e293b;
    --table-hover-bg: #1e293b;
    --modal-footer-bg: #1e293b;

    /* 线框按钮 */
    --btn-outline-bg: #1e293b;
    --btn-outline-border: #334155;
    --btn-outline-hover: #334155;

    /* 语义化半透明背景 */
    --color-success-bg: rgba(16, 185, 129, 0.15);
    --color-success-border: #065f46;

    --color-warning-bg: rgba(245, 158, 11, 0.15);
    --color-warning-border: #92400e;

    --color-danger-bg: rgba(239, 68, 68, 0.15);
    --color-danger-border: #991b1b;

    --color-info-bg: rgba(2, 132, 199, 0.15);
    --color-info-border: #075985;

    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.7), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* 基础通用类 */
.font-mono { font-family: var(--font-mono); }
.select-all { user-select: all; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.font-bold { font-weight: 700; }
.flex-1 { flex: 1; }
.ml-2 { margin-left: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.space-y-4 > * + * { margin-top: 1rem; }
.pt-2 { padding-top: 0.5rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }

/* 页面框架 */
.site-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.public-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 40;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.header-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
}

.brand-badge {
    background: var(--color-primary);
    color: #ffffff;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 2px 7px;
    border-radius: var(--radius-sm);
    letter-spacing: 0.05em;
}

.brand-name {
    display: block;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

.brand-slogan {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
}

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

/* 主题切换按钮 */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 0.78rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    background: var(--bg-elevated);
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
}
.theme-toggle:hover {
    background: var(--bg-hover);
    border-color: var(--text-light);
}
.theme-icon {
    font-size: 0.85rem;
    line-height: 1;
}

.announcement-banner {
    background: var(--color-warning-bg);
    border-bottom: 1px solid var(--color-warning-border);
    padding: 8px 16px;
    font-size: 0.8rem;
    color: #92400e;
}
html[data-theme="dark"] .announcement-banner {
    color: #fde68a;
}

.announcement-inner {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.announcement-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.main-content {
    flex: 1;
    max-width: 680px;
    width: 100%;
    margin: 0 auto;
    padding: 28px 16px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 卡片系统 */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

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

.card-title-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title {
    font-size: 0.92rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-title);
}

.dot-indicator {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    display: inline-block;
}
.dot-dark { background: var(--color-primary); }
.dot-success { background: var(--color-success); }

.card-body {
    padding: 22px 24px;
}

/* 表单与交互元素 */
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.88rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-input);
    color: var(--text-main);
    transition: all 0.15s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-tip {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.input-action-row {
    display: flex;
    gap: 10px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-sm { padding: 6px 12px; font-size: 0.78rem; border-radius: var(--radius-sm); }
.btn-xs { padding: 4px 8px; font-size: 0.7rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 14px 22px; font-size: 0.98rem; }
.btn-block { width: 100%; }

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
}
.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

.btn-outline {
    background: var(--btn-outline-bg);
    border-color: var(--btn-outline-border);
    color: var(--text-main);
}
.btn-outline:hover:not(:disabled) {
    background: var(--btn-outline-hover);
    border-color: var(--text-light);
}

.btn-danger {
    background: var(--color-danger);
    color: #ffffff;
}
.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-reuse {
    background: var(--color-success-bg);
    border-color: var(--color-success-border);
    color: #065f46;
    font-weight: 700;
}
html[data-theme="dark"] .btn-reuse {
    color: #34d399;
}
.btn-reuse:hover:not(:disabled) {
    background: rgba(16, 185, 129, 0.25);
}

.btn-copy {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: #ffffff;
    padding: 8px 14px;
    border-radius: var(--radius-md);
}
.btn-copy:hover {
    background: rgba(255, 255, 255, 0.22);
}

.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-accent);
    cursor: pointer;
    text-decoration: underline;
    font-size: 0.8rem;
}

.btn-icon-link {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
}
.btn-icon-link:hover { color: var(--text-main); }

.btn-icon {
    width: 18px;
    height: 18px;
}

/* 额度卡片网格 */
.quota-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 18px;
}

.quota-item {
    display: flex;
    flex-direction: column;
}

.quota-divider {
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    padding: 0 16px;
    margin: 0 16px;
}

.quota-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
}

.quota-value {
    font-size: 1.4rem;
    font-weight: 800;
    font-family: var(--font-mono);
    line-height: 1.2;
    margin-top: 2px;
}

/* 号码卡片内部 */
.number-header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.live-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    font-weight: 700;
    background: var(--color-success-bg);
    color: #065f46;
    border: 1px solid var(--color-success-border);
    padding: 3px 9px;
    border-radius: var(--radius-full);
}
html[data-theme="dark"] .live-pill {
    color: #34d399;
}

.pulse-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-success);
    animation: pulse 1.6s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.icon-refresh {
    width: 14px;
    height: 14px;
}
.spin {
    animation: spin 1s linear infinite;
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.phone-banner {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    border: 1px solid var(--border-color);
    color: #ffffff;
    border-radius: var(--radius-md);
    padding: 18px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.phone-label {
    font-size: 0.75rem;
    color: #94a3b8;
    font-weight: 600;
}

.phone-number {
    font-size: 1.7rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    margin-top: 2px;
}

.countdown-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
    margin-top: 14px;
}

.countdown-grid.grid-2-cols {
    grid-template-columns: 1fr 1fr;
}

.countdown-item {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 14px;
}

.countdown-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 600;
}

.countdown-value {
    font-size: 1.05rem;
    font-weight: 800;
    margin-top: 4px;
}

.status-badge-inline {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--color-primary);
}

.change-action-bar {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.rule-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
}
.rule-title {
    font-weight: 700;
    color: var(--text-main);
}

/* 验证码大看板 */
.code-billboard {
    background: linear-gradient(180deg, #0f172a 0%, #020617 100%);
    border: 1px solid var(--border-color);
    color: #ffffff;
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
}

.code-billboard-header {
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    font-weight: 700;
    color: #94a3b8;
}

.code-big-text {
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: 0.18em;
    color: #34d399;
    padding: 10px 0;
    line-height: 1.1;
}

.code-billboard-action {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.sms-raw-box {
    background: rgba(255, 255, 255, 0.05);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: left;
}

.sms-raw-label {
    font-size: 0.72rem;
    color: #94a3b8;
    font-weight: 600;
    margin-bottom: 4px;
}

.sms-raw-text {
    font-size: 0.85rem;
    color: #e2e8f0;
    line-height: 1.6;
    word-break: break-all;
}

.sms-raw-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.72rem;
    color: #94a3b8;
    margin-top: 12px;
    padding-top: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.messages-history {
    margin-top: 20px;
}
.history-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 10px;
}

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

.history-item {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 16px;
}

.history-item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.history-code-badge {
    background: var(--color-primary);
    color: #ffffff;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

/* 页脚 */
.public-footer {
    border-top: 1px solid var(--border-color);
    padding: 20px 16px;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: auto;
}

/* 后台管理系统样式 */
.admin-login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top, #e2e8f0 0%, #cbd5e1 100%);
    padding: 20px;
}
html[data-theme="dark"] .admin-login-body {
    background: radial-gradient(circle at top, #1e293b 0%, #0f172a 100%);
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 32px 28px;
}

.login-top-bar {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 12px;
}

.login-header {
    text-align: center;
    margin-bottom: 24px;
}

.logo-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-primary);
    margin-right: 6px;
}

.login-logo {
    display: inline-flex;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 12px;
}

.login-subtitle {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.login-footer {
    text-align: center;
    margin-top: 24px;
}
.link-muted {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-decoration: none;
}
.link-muted:hover { text-decoration: underline; color: var(--text-main); }

/* 后台主体框架 */
.admin-body {
    background: var(--bg-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.admin-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 40;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.admin-header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: inherit;
}

.brand-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-main);
}

.badge {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: var(--radius-sm);
}
.badge-primary { background: var(--color-primary); color: #ffffff; }

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.admin-user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    font-weight: 600;
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #ffffff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 800;
}

/* 后台布局：无论电脑还是手机，始终保持水平 row 布局，导航在左侧 */
.admin-layout {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: row;
    flex: 1;
    padding: 24px;
    gap: 24px;
    position: relative;
}

/* 侧边栏 */
.admin-sidebar {
    width: 220px;
    flex-shrink: 0;
    transition: width 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 折叠展开按钮 */
.sidebar-toggle-box {
    margin-bottom: 12px;
}

.sidebar-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
}
.sidebar-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-main);
    border-color: var(--text-light);
}

.toggle-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* PC 端折叠状态 (width = 68px) */
.admin-sidebar.collapsed {
    width: 68px;
}
.admin-sidebar.collapsed .nav-item span {
    display: none;
}
.admin-sidebar.collapsed .sidebar-toggle .toggle-text {
    display: none;
}
.admin-sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 10px 0;
}
.admin-sidebar.collapsed .sidebar-toggle {
    justify-content: center;
    padding: 8px 0;
}

.admin-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    border: none;
    background: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: left;
    transition: all 0.15s ease;
    width: 100%;
}

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

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

.nav-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.admin-main {
    flex: 1;
    min-width: 0;
}

.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
}

.page-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    gap: 16px;
}

.page-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-main);
}

.page-subtitle {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* 概览数据卡片阵列 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.stat-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 800;
    font-family: var(--font-mono);
    margin: 6px 0;
}

.stat-foot {
    font-size: 0.72rem;
    color: var(--text-light);
}

/* 工具栏与表格卡片 */
.toolbar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    margin-bottom: 16px;
}

.toolbar-form {
    display: flex;
    align-items: center;
    gap: 12px;
}

.form-group-inline {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
}

.table-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.82rem;
}

.data-table th {
    background: var(--table-th-bg);
    padding: 12px 16px;
    font-weight: 700;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-main);
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background: var(--table-hover-bg);
}

.table-pagination {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 16px;
    font-size: 0.8rem;
    border-top: 1px solid var(--border-light);
}

/* 状态标签 */
.status-pill {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 700;
}
.status-active { background: #dcfce7; color: #15803d; }
.status-disabled { background: #f1f5f9; color: #64748b; }
.status-idle { background: #ecfdf5; color: #047857; }
.status-busy { background: #eff6ff; color: #1d4ed8; }
.status-external { background: #fef3c7; color: #b45309; }
.status-cooldown { background: #fee2e2; color: #b91c1c; }
.status-depleted { background: #f3f4f6; color: #6b7280; }

html[data-theme="dark"] .status-active { background: rgba(16, 185, 129, 0.2); color: #34d399; }
html[data-theme="dark"] .status-disabled { background: rgba(100, 116, 139, 0.2); color: #94a3b8; }
html[data-theme="dark"] .status-idle { background: rgba(16, 185, 129, 0.2); color: #34d399; }
html[data-theme="dark"] .status-busy { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
html[data-theme="dark"] .status-external { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
html[data-theme="dark"] .status-cooldown { background: rgba(239, 68, 68, 0.2); color: #f87171; }
html[data-theme="dark"] .status-depleted { background: rgba(107, 114, 128, 0.2); color: #9ca3af; }

/* 模态弹窗 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 50;
    padding: 16px;
}
.modal.open {
    display: flex;
}

.modal-dialog {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    color: var(--text-main);
}

.modal-dialog.modal-dialog-lg {
    max-width: 680px;
}

.modal-body {
    overflow-y: auto;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }

.checkbox-inline {
    display: inline-flex !important;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.local-number-picker {
    max-height: 220px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
    padding: 6px;
}

.local-number-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.82rem;
    transition: background-color 0.15s ease;
}

.local-number-option:hover {
    background: var(--bg-hover);
}

.local-number-option-left {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.note-cell {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    max-width: 220px;
}

.note-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.btn-group {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.modal-header {
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}
.modal-header h3 { font-size: 1.05rem; font-weight: 700; color: var(--text-main); }
.modal-close {
    background: none;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-light);
}
.modal-close:hover { color: var(--text-main); }

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 14px 24px;
    background: var(--modal-footer-bg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 提示通知条 */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.82rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.alert-error {
    background: var(--color-danger-bg);
    border: 1px solid var(--color-danger-border);
    color: #ef4444;
}
.alert-warning {
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
    color: #f59e0b;
}
.alert-info {
    background: var(--color-info-bg);
    border: 1px solid var(--color-info-border);
    color: #0284c7;
}

.alert-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Toast 系统 */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: 12px 18px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
    pointer-events: auto;
    animation: toast-in 0.2s ease-out;
}
.toast-success { border-left: 4px solid var(--color-success); }
.toast-error { border-left: 4px solid var(--color-danger); }
.toast-warning { border-left: 4px solid var(--color-warning); }

@keyframes toast-in {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* 响应式适配 (手机端重整：后台导航始终在左侧，表格支持横向滑动) */
@media (max-width: 768px) {
    .header-container {
        padding: 10px 14px;
    }
    .main-content {
        padding: 16px 12px;
    }
    .countdown-grid, .countdown-grid.grid-2-cols {
        grid-template-columns: 1fr;
    }
    .change-action-bar {
        flex-direction: column;
        align-items: flex-start;
    }
    .phone-banner {
        flex-direction: column;
        align-items: flex-start;
    }
    .input-action-row {
        flex-direction: column;
    }

    /* 后台布局：电脑和手机始终在左侧，绝对不能变成 flex-direction: column！ */
    .admin-layout {
        flex-direction: row;
        padding: 12px 8px;
        gap: 12px;
        position: relative;
    }

    /* 手机端侧栏基底：默认宽度 64px rail */
    .admin-sidebar {
        width: 64px;
        flex-shrink: 0;
    }
    .admin-sidebar .nav-item span {
        display: none;
    }
    .admin-sidebar .sidebar-toggle .toggle-text {
        display: none;
    }
    .admin-sidebar .nav-item {
        justify-content: center;
        padding: 10px 0;
    }
    .admin-sidebar .sidebar-toggle {
        justify-content: center;
        padding: 8px 0;
    }

    /* 手机端侧栏展开态：以浮动侧边栏形式覆盖在主内容上方，220px 宽度 */
    .admin-sidebar:not(.collapsed) {
        position: fixed;
        top: 56px;
        left: 0;
        bottom: 0;
        width: 220px;
        z-index: 95;
        background: var(--bg-card);
        box-shadow: var(--shadow-lg);
        border-right: 1px solid var(--border-color);
        padding: 16px 12px;
    }
    .admin-sidebar:not(.collapsed) .nav-item span {
        display: inline;
    }
    .admin-sidebar:not(.collapsed) .sidebar-toggle .toggle-text {
        display: inline;
    }
    .admin-sidebar:not(.collapsed) .nav-item {
        justify-content: flex-start;
        padding: 10px 14px;
    }
    .admin-sidebar:not(.collapsed) .sidebar-toggle {
        justify-content: flex-start;
        padding: 8px 12px;
    }

    /* 手机端后台主体与表格适配 */
    .admin-main {
        flex: 1;
        min-width: 0;
    }
    .data-table {
        min-width: 900px;
    }
    .table-card {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        width: 100%;
    }

    /* 手机端 Header 优化 */
    .admin-header-inner {
        padding: 10px 14px;
    }
    .header-right {
        gap: 8px;
    }
    .admin-user-info .user-name {
        display: none;
    }
}