/* ============================================================
   维汉双语餐厅管理系统 - 主样式表
   简洁商用深色风格 + 毛玻璃效果
   ============================================================ */

/* ── CSS 变量 / 主题系统 ────────────────────────────── */
/*   配色规则：主色 60% + 辅助色 30% + 点缀色 10%            */

/* 主题一：暖橙（默认）— 深棕暖色底 + 暖棕辅助 + 橙色点缀 */
:root,
[data-theme="warm"] {
    /* 60% 主色：背景、正文、大面积区域 */
    --bg-primary:      #2c2118;
    --bg-secondary:    #352a1f;
    --text-primary:    #f5efe6;
    --text-secondary:  #c4a882;
    --text-muted:      #9b8468;

    /* 30% 辅助色：侧栏、卡片、边框 */
    --bg-card:         rgba(244,200,140,0.06);
    --bg-card-hover:   rgba(244,200,140,0.10);
    --bg-sidebar:      #231a12;
    --glass:           rgba(244,200,140,0.07);
    --glass-border:    rgba(244,200,140,0.12);
    --border:          rgba(244,200,140,0.10);

    /* 10% 点缀色：按钮、链接、强调 */
    --accent:          #f97316;
    --accent-hover:    #ea580c;
    --accent-soft:     rgba(249,115,22,0.15);

    --success:         #22c55e;  --success-soft:  rgba(34,197,94,0.15);
    --danger:          #ef4444;  --danger-soft:   rgba(239,68,68,0.15);
    --warning:         #fbbf24;  --warning-soft:  rgba(251,191,36,0.15);

    /* 共用结构变量 */
    --radius: 12px;  --radius-sm: 8px;  --radius-lg: 16px;
    --sidebar-width: 220px;  --topbar-h: 60px;
    --shadow-sm:  0 2px 8px  rgba(0,0,0,0.25);
    --shadow-md:  0 4px 20px rgba(0,0,0,0.35);
    --shadow-lg:  0 8px 40px rgba(0,0,0,0.45);
    --transition: 0.2s ease;
    --font-zh: 'PingFang SC','Microsoft YaHei',sans-serif;
    --theme-dot: #f97316;
}

/* 主题二：清新绿 — 米白浅底 + 浅绿辅助 + 翠绿点缀 */
[data-theme="fresh"] {
    /* 60% 主色 */
    --bg-primary:      #f4f8f4;
    --bg-secondary:    #eaf3ea;
    --text-primary:    #1a2e1a;
    --text-secondary:  #4a6a4a;
    --text-muted:      #7a9a7a;

    /* 30% 辅助色 */
    --bg-card:         rgba(34,100,34,0.05);
    --bg-card-hover:   rgba(34,100,34,0.09);
    --bg-sidebar:      #1e3320;
    --glass:           rgba(255,255,255,0.55);
    --glass-border:    rgba(34,100,34,0.12);
    --border:          rgba(34,100,34,0.10);

    /* 10% 点缀色 */
    --accent:          #22c55e;
    --accent-hover:    #16a34a;
    --accent-soft:     rgba(34,197,94,0.12);

    --success:         #15803d;  --success-soft:  rgba(21,128,61,0.12);
    --danger:          #dc2626;  --danger-soft:   rgba(220,38,38,0.12);
    --warning:         #d97706;  --warning-soft:  rgba(217,119,6,0.12);

    --radius: 12px;  --radius-sm: 8px;  --radius-lg: 16px;
    --sidebar-width: 220px;  --topbar-h: 60px;
    --shadow-sm:  0 2px 8px  rgba(0,0,0,0.06);
    --shadow-md:  0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg:  0 8px 40px rgba(0,0,0,0.10);
    --transition: 0.2s ease;
    --font-zh: 'PingFang SC','Microsoft YaHei',sans-serif;
    --theme-dot: #22c55e;
}

/* 主题三：轻奢红黑 — 纯黑底 + 深红辅助 + 金色点缀 */
[data-theme="luxury"] {
    /* 60% 主色 */
    --bg-primary:      #0c0a09;
    --bg-secondary:    #171412;
    --text-primary:    #faf5f0;
    --text-secondary:  #b8a89a;
    --text-muted:      #7a6e64;

    /* 30% 辅助色 */
    --bg-card:         rgba(180,60,60,0.06);
    --bg-card-hover:   rgba(180,60,60,0.10);
    --bg-sidebar:      #1a0f0f;
    --glass:           rgba(180,60,60,0.07);
    --glass-border:    rgba(180,60,60,0.12);
    --border:          rgba(255,255,255,0.06);

    /* 10% 点缀色 — 金色 */
    --accent:          #d4a853;
    --accent-hover:    #c49a3f;
    --accent-soft:     rgba(212,168,83,0.15);

    --success:         #4ade80;  --success-soft:  rgba(74,222,128,0.12);
    --danger:          #f87171;  --danger-soft:   rgba(248,113,113,0.12);
    --warning:         #fbbf24;  --warning-soft:  rgba(251,191,36,0.12);

    --radius: 12px;  --radius-sm: 8px;  --radius-lg: 16px;
    --sidebar-width: 220px;  --topbar-h: 60px;
    --shadow-sm:  0 2px 8px  rgba(0,0,0,0.35);
    --shadow-md:  0 4px 20px rgba(0,0,0,0.50);
    --shadow-lg:  0 8px 40px rgba(0,0,0,0.60);
    --transition: 0.2s ease;
    --font-zh: 'PingFang SC','Microsoft YaHei',sans-serif;
    --theme-dot: #d4a853;
}

/* ── 基础重置 ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; scroll-behavior: smooth; }

body {
    font-family: var(--font-zh);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

/* ── 布局骨架 ─────────────────────────────────────────── */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

/* ── 侧边栏 ───────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 200;
    transition: transform var(--transition);
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px 16px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border);
}
.logo-icon { font-size: 22px; }
.logo-text  {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-menu { list-style: none; padding: 12px 8px; flex: 1; }
.nav-item  { margin-bottom: 2px; }
.nav-item a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition);
}
.nav-item a:hover,
.nav-item.active a {
    background: var(--accent-soft);
    color: var(--accent);
}
.nav-icon  { font-size: 16px; width: 20px; text-align: center; flex-shrink: 0; }

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
}
.user-info   { display: flex; align-items: center; gap: 10px; }
.user-avatar {
    width: 34px; height: 34px;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; font-weight: 700;
    flex-shrink: 0;
}
.user-name  { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.user-role-badge {
    font-size: 11px;
    padding: 1px 8px;
    border-radius: 20px;
    display: inline-block;
    margin-top: 2px;
}
.role-1 { background: var(--warning-soft); color: var(--warning); }
.role-2 { background: var(--accent-soft);  color: var(--accent);  }
.role-3 { background: var(--glass);        color: var(--text-muted); }

/* ── 主内容区 ─────────────────────────────────────────── */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
}

/* ── 顶部栏 ───────────────────────────────────────────── */
.topbar {
    height: var(--topbar-h);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 100;
}
.sidebar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.sidebar-toggle span {
    display: block;
    width: 22px; height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all var(--transition);
}
.page-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
}
.topbar-actions { display: flex; align-items: center; gap: 10px; }

/* 语言切换 */
.lang-switch {
    display: flex;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2px;
}
.lang-btn {
    padding: 4px 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    transition: all var(--transition);
}
.lang-btn.active {
    background: var(--accent);
    color: #fff;
}

/* ── 内容区 ───────────────────────────────────────────── */
.content-body {
    flex: 1;
    padding: 24px;
    overflow-x: hidden;
}

/* ── 卡片 ─────────────────────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

/* ── 按钮 ─────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    text-decoration: none;
}
.btn-primary  { background: var(--accent);   color: #fff; }
.btn-primary:hover  { background: var(--accent-hover); color: #fff; }
.btn-success  { background: var(--success);  color: #fff; }
.btn-success:hover  { background: #16a34a; color: #fff; }
.btn-danger   { background: var(--danger);   color: #fff; }
.btn-danger:hover   { background: #dc2626; color: #fff; }
.btn-warning  { background: var(--warning);  color: #fff; }
.btn-warning:hover  { background: #d97706; color: #fff; }
.btn-ghost    { background: var(--bg-card);  color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover    { background: var(--bg-card-hover); color: var(--text-primary); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── 表格 ─────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; border-radius: var(--radius); }
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
thead th {
    background: rgba(255,255,255,0.03);
    padding: 12px 14px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
tbody td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--bg-card-hover); }

/* ── 桌台网格 ─────────────────────────────────────────── */
.table-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 14px;
    margin-top: 16px;
}
.table-card {
    background: var(--bg-card);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 14px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.table-card:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.table-card.busy {
    border-color: var(--success);
    background: var(--success-soft);
}
.table-card.busy:hover { border-color: #16a34a; }
.table-icon    { font-size: 32px; margin-bottom: 8px; }
.table-name    { font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.table-status-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}
.badge-idle { background: var(--glass); color: var(--text-muted); }
.badge-busy { background: var(--success-soft); color: var(--success); }
.table-time { font-size: 11px; color: var(--text-muted); margin-top: 6px; }
.table-actions {
    display: flex;
    gap: 6px;
    margin-top: 10px;
    justify-content: center;
}

/* ── 统计卡片 ─────────────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
}
.stat-label { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.stat-value {
    font-size: 26px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}
.stat-value.accent  { color: var(--accent); }
.stat-value.success { color: var(--success); }
.stat-value.warning { color: var(--warning); }
.stat-icon { font-size: 20px; float: right; opacity: 0.4; }

/* ── 表单 ─────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    transition: border-color var(--transition);
    outline: none;
    font-family: inherit;
}
.form-control:focus { border-color: var(--accent); }
.form-control::placeholder { color: var(--text-muted); }
select.form-control { cursor: pointer; }
select.form-control option { background: var(--bg-secondary); }

/* ── 弹窗 Modal ───────────────────────────────────────── */
.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 300;
}
.overlay.active { display: block; }
.modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    width: 90%;
    max-width: 460px;
    z-index: 400;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition), opacity var(--transition);
    opacity: 0;
}
.modal.active {
    display: block;
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.modal-title { font-size: 16px; font-weight: 700; color: var(--text-primary); }
.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
    line-height: 1;
    padding: 2px 6px;
    border-radius: 4px;
    transition: all var(--transition);
}
.modal-close:hover { background: var(--danger-soft); color: var(--danger); }
.modal-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

/* ── Toast ────────────────────────────────────────────── */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 24px;
    font-size: 14px;
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: transform 0.3s ease;
    white-space: nowrap;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.success { border-color: var(--success); color: var(--success); }
.toast.error   { border-color: var(--danger);  color: var(--danger); }

/* ── 徽章 ─────────────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}
.badge-success { background: var(--success-soft); color: var(--success); }
.badge-danger  { background: var(--danger-soft);  color: var(--danger); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-primary { background: var(--accent-soft);  color: var(--accent); }
.badge-muted   { background: var(--glass);        color: var(--text-muted); }

/* ── 分隔线 ───────────────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

/* ── 工具类 ───────────────────────────────────────────── */
.flex       { display: flex; }
.flex-center{ display: flex; align-items: center; justify-content: center; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.mt-4   { margin-top: 4px; }
.mt-8   { margin-top: 8px; }
.mt-16  { margin-top: 16px; }
.mb-16  { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-muted  { color: var(--text-muted); font-size: 13px; }
.text-sm     { font-size: 13px; }
.fw-bold     { font-weight: 700; }
.hidden      { display: none !important; }

/* ── 登录页 ───────────────────────────────────────────── */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(59,130,246,0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(34,197,94,0.05) 0%, transparent 50%),
        var(--bg-primary);
}
.login-box {
    width: 100%;
    max-width: 380px;
    padding: 40px 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
}
.login-header { text-align: center; margin-bottom: 32px; }
.login-logo   { font-size: 48px; margin-bottom: 12px; }
.login-title  { font-size: 22px; font-weight: 800; color: var(--text-primary); }
.login-sub    { font-size: 13px; color: var(--text-muted); margin-top: 4px; }
.login-error  {
    background: var(--danger-soft);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 16px;
    display: none;
}
.login-error.show { display: block; }
.login-footer {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

/* ── 响应式 ───────────────────────────────────────────── */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
    .main-content { margin-left: 0; }
    .sidebar-toggle { display: flex; }
    .content-body { padding: 16px; }
    .table-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .topbar { padding: 0 14px; }
    .modal { width: 96%; padding: 18px; }
}
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ── 会员卡 v2 补充样式 ─────────────────────────────── */
/* VIP 金色徽章 */
.badge-vip {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    color: #fff;
    font-weight: 700;
}
.badge-normal {
    background: rgba(99,102,241,.15);
    color: var(--primary, #6366f1);
}
/* 余额正数高亮 */
.balance-positive { color: #10b981 !important; font-weight: 700; }
/* 宽弹窗（充值记录） */
.modal-wide { max-width: 660px; width: 96%; }
/* 流水表格 */
.log-table { width:100%; border-collapse:collapse; font-size:13px; }
.log-table th, .log-table td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}
.log-table th { color: var(--text-secondary); font-weight: 600; }
.deduct { color: var(--danger); font-weight: 700; }
.credit { color: #10b981; font-weight: 700; }

/* ── 主题切换按钮 ─────────────────────────────────────── */
.theme-switcher {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-right: 4px;
}
.theme-btn {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s;
    position: relative;
    flex-shrink: 0;
}
.theme-btn:hover { transform: scale(1.2); }
.theme-btn.active {
    border-color: var(--text-primary);
    transform: scale(1.18);
    box-shadow: 0 0 0 3px rgba(255,255,255,0.15);
}
.theme-btn[data-t="warm"]   { background: radial-gradient(circle at 40% 40%, #fdba74, #c2410c); }
.theme-btn[data-t="fresh"]  { background: radial-gradient(circle at 40% 40%, #86efac, #166534); }
.theme-btn[data-t="luxury"] { background: radial-gradient(circle at 40% 40%, #fde68a, #92702a); }

/* 清新绿（浅色主题）特殊适配 */
[data-theme="fresh"] .login-box {
    background: rgba(255,255,255,0.85);
    border: 1px solid rgba(34,100,34,0.10);
    box-shadow: 0 8px 40px rgba(0,0,0,0.08);
}
[data-theme="fresh"] .form-control {
    background: rgba(255,255,255,0.8);
    color: #1a2e1a;
    border-color: rgba(34,100,34,0.15);
}
[data-theme="fresh"] .form-control::placeholder { color: #7a9a7a; }
[data-theme="fresh"] .modal {
    background: rgba(255,255,255,0.95);
    border: 1px solid rgba(34,100,34,0.10);
}
[data-theme="fresh"] .modal-title { color: #1a2e1a; }
[data-theme="fresh"] .btn-ghost {
    color: #4a6a4a;
    background: rgba(34,100,34,0.06);
}
[data-theme="fresh"] .btn-ghost:hover {
    background: rgba(34,100,34,0.12);
}
[data-theme="fresh"] .btn-primary {
    color: #fff;
}
[data-theme="fresh"] .topbar {
    background: rgba(255,255,255,0.70);
    border-bottom: 1px solid rgba(34,100,34,0.08);
}
[data-theme="fresh"] .topbar .page-title { color: #1a2e1a; }
[data-theme="fresh"] .sidebar-toggle span { background: #4a6a4a; }

/* ── 版权信息栏 ───────────────────────────────────────── */
.copyright-bar {
    text-align: center;
    padding: 10px 16px;
    font-size: 12px;
    color: var(--text-muted);
    opacity: 0.6;
    user-select: none;
}
/* 登录页：紧跟登录按钮下方 */
.login-box .copyright-bar {
    margin-top: 20px;
}
/* 后台页：绝对定位底部，不占空间，不影响界面 */
.main-content > .copyright-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}