/* ============================================
   CashierSystem.Web - V5 完整版
   包含侧边栏折叠、分页、Tab美化、弹窗动画等
   ============================================ */

/* ============================================
   1. CSS 变量
   ============================================ */
:root {
    --primary: #409eff;
    --primary-hover: #66b1ff;
    --primary-light: #ecf5ff;
    --success: #67c23a;
    --warning: #e6a23c;
    --danger: #f56c6c;
    --text: #303133;
    --text-regular: #606266;
    --text-secondary: #909399;
    --border: #e4e7ed;
    --border-light: #ebeef5;
    --bg: #f5f6fa;
    --sidebar-width: 200px;
    --sidebar-collapsed-width: 56px;
    --radius: 6px;
    --radius-lg: 8px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* ============================================
   2. 基础重置
   ============================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 13px; }

body {
    font-family: var(--font);
    font-size: 13px;
    color: var(--text);
    background: var(--bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

/* ============================================
   3. 布局
   ============================================ */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ============================================
   4. 左侧边栏
   ============================================ */
.sidebar {
    width: var(--sidebar-width);
    background: #fff;
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: width 0.3s ease;
}

/* 侧边栏折叠状态 */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .brand span:not(.brand-icon) {
    display: none;
}

.sidebar.collapsed .user-btn span {
    display: none;
}

.sidebar.collapsed .nav-item span:not(.icon) {
    display: none;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 7px 0;
}

.sidebar.collapsed .nav-section-title {
    display: none;
}

.sidebar.collapsed .sidebar-toggle {
    transform: rotate(180deg);
}

.sidebar.collapsed ~ .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* 侧边栏头部 */
.sidebar-header {
    padding: 0 14px;
    height: 48px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: space-between;
}

.sidebar-header .brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.sidebar-header .brand-icon {
    font-size: 20px;
}

.sidebar-header .header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-header .user-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-regular);
    cursor: pointer;
    border: 1px solid var(--border);
    background: #fff;
    white-space: nowrap;
    max-width: 140px;
}

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

/* 侧边栏切换按钮 */
.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.sidebar-toggle:hover {
    color: var(--primary);
}

/* 侧边栏导航 */
.sidebar-nav {
    flex: 1;
    padding: 8px 10px;
    overflow-y: auto;
}

.nav-section { margin-bottom: 4px; }

.nav-section-title {
    padding: 6px 10px;
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border-radius: 4px;
    color: var(--text-regular);
    font-size: 13px;
    transition: all 0.15s;
    margin-bottom: 1px;
}

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

.nav-item.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 500;
}

.nav-item .icon { font-size: 15px; width: 18px; text-align: center; }

/* ============================================
   5. 主内容区
   ============================================ */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 16px 20px;
    min-height: 100vh;
    max-width: calc(100vw - var(--sidebar-width));
    transition: margin-left 0.3s ease;
    display: flex;
    flex-direction: column;
    padding-top: 48px; /* top-bar高度 */
}

/* ============================================
   6. 页面标题
   ============================================ */
.page-header {
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-header h1 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
}

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

/* ============================================
   7. 卡片
   ============================================ */
.card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    margin-bottom: 12px;
}

.card-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.card-body { padding: 16px; }

/* ============================================
   8. 统计卡片
   ============================================ */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.stat-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 16px;
    text-align: center;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    border-top: 3px solid var(--primary);
}

.stat-card.border-green { border-top-color: var(--success); }
.stat-card.border-orange { border-top-color: var(--warning); }
.stat-card.border-red { border-top-color: var(--danger); }
.stat-card.border-gray { border-top-color: #c0c4cc; }

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
    margin-bottom: 4px;
}

.stat-value.success { color: var(--success); }
.stat-value.warning { color: var(--warning); }
.stat-value.danger { color: var(--danger); }

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ============================================
   9. 仪表盘快捷按钮
   ============================================ */
.dashboard-card {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.dashboard-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.dashboard-card .card-body {
    text-align: center;
    padding: 24px 16px;
}

.dashboard-card .icon {
    font-size: 36px;
    margin-bottom: 8px;
}

.dashboard-card h3 {
    font-size: 16px;
    font-weight: 500;
    color: #333;
    margin: 0;
}

.dashboard-card p {
    font-size: 12px;
    color: #999;
    margin-top: 6px;
}

/* ============================================
   10. 按钮
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 6px 14px;
    border-radius: 4px;
    font-size: 13px;
    font-family: var(--font);
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.15s;
    line-height: 1.4;
    white-space: nowrap;
}

.btn:hover { opacity: 0.85; }

.btn:disabled {
    opacity: 0.7;
    cursor: wait !important;
}

.btn-spinner {
    animation: none;
}

.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-warning { background: var(--warning); color: #fff; border-color: var(--warning); }
.btn-default {
    background: #fff;
    color: var(--text-regular);
    border-color: var(--border);
}
.btn-default:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-lg { padding: 10px 24px; font-size: 14px; }

/* 按钮加载动画 */
.btn-spinner {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

@keyframes btnSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.btn-spinner::after {
    content: "";
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: btnSpin 0.6s linear infinite;
}

/* ============================================
   11. 表单
   ============================================ */
.form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 12px;
}

.form-group {
    flex: 1;
    min-width: 160px;
}

.form-group.flex2 { flex: 2; }
.form-group.flex3 { flex: 3; }

.form-label {
    display: block;
    font-size: 12px;
    color: var(--text-regular);
    margin-bottom: 4px;
    font-weight: 500;
}

.form-control, .form-select {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
    font-family: var(--font);
    color: var(--text);
    background: #fff;
    outline: none;
    transition: border-color 0.15s;
}

.form-control:focus, .form-select:focus { border-color: var(--primary); }
.form-control::placeholder { color: #c0c4cc; }

textarea.form-control { resize: vertical; min-height: 60px; }

/* ============================================
   12. 表格
   ============================================ */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table thead th {
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    background: #fafbfc;
    font-size: 12px;
    white-space: nowrap;
}

.data-table tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-regular);
    vertical-align: middle;
}

.data-table tbody tr:hover { background: #fafbfc; }
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table .text-right { text-align: right; }
.data-table .text-center { text-align: center; }

/* ============================================
   13. Tab 选项卡
   ============================================ */
.tab-bar {
    display: flex;
    gap: 4px;
    background: var(--bg);
    border-radius: var(--radius);
    padding: 4px;
    width: fit-content;
    margin-bottom: 16px;
}

.tab-item {
    padding: 7px 18px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    border: none;
    background: transparent;
    font-family: var(--font);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.tab-item:hover { color: var(--text-regular); }

.tab-item.active {
    background: #fff;
    color: var(--primary);
    font-weight: 500;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

/* ============================================
   14. 分页
   ============================================ */
.pagination-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-top: 1px solid var(--border-light);
    font-size: 13px;
    color: var(--text-regular);
}

.pagination-left {
    display: flex;
    align-items: center;
    gap: 6px;
}

.pagination-left select {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 13px;
}

.pagination-info {
    color: var(--text-secondary);
}

.pagination-right {
    display: flex;
    align-items: center;
    gap: 4px;
}

.pagination-right a, .pagination-right span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    border-radius: 4px;
    font-size: 13px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text-regular);
    text-decoration: none;
    cursor: pointer;
}

.pagination-right a:hover {
    border-color: var(--primary);
    color: var(--primary);
}

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

.pagination-right span.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 兼容旧分页 */
.pagination {
    display: flex;
    gap: 4px;
    list-style: none;
    padding: 0;
}

.page-item .page-link {
    display: block;
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--text-regular);
    border: 1px solid var(--border);
    background: #fff;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
    min-width: 32px;
    text-align: center;
}

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

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

.page-item.disabled .page-link {
    opacity: 0.4;
    cursor: not-allowed;
    background: #f5f7fa;
}

/* ============================================
   15. 标签
   ============================================ */
.tag {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 500;
}

.tag-blue { background: var(--primary-light); color: var(--primary); }
.tag-green { background: #f0f9eb; color: var(--success); }
.tag-red { background: #fef0f0; color: var(--danger); }
.tag-orange { background: #fdf6ec; color: var(--warning); }
.tag-gray { background: #f4f4f5; color: var(--text-secondary); }

/* ============================================
   16. 提醒
   ============================================ */
.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    margin-bottom: 12px;
    font-size: 13px;
    position: relative;
    z-index: 95; /* 高于top-bar的90 */
}

.alert-info { background: var(--primary-light); color: var(--primary); border: 1px solid #d9ecff; }
.alert-success { background: #f0f9eb; color: var(--success); border: 1px solid #e1f3d8; }
.alert-danger { background: #fef0f0; color: var(--danger); border: 1px solid #fde2e2; }

/* 可关闭Alert - 关闭按钮在最右边 */
.alert-dismissible {
    padding-right: 40px !important; /* 给关闭按钮留空间 */
}

.alert-close {
    position: absolute;
    top: 50%;
    right: 10px;
    transform: translateY(-50%);
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: inherit;
    font-size: 16px;
    font-weight: 300;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
    transition: all 0.2s ease;
    padding: 0;
    margin: 0;
}

.alert-close:hover {
    opacity: 1;
    background: rgba(0,0,0,0.08);
}

.alert-success .alert-close:hover { background: rgba(82,196,26,0.15); }
.alert-danger .alert-close:hover { background: rgba(245,108,108,0.15); }

/* ============================================
   17. 信息条
   ============================================ */
.info-bar {
    background: #fff;
    border-left: 3px solid var(--primary);
    padding: 10px 14px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-bottom: 16px;
    color: var(--text-regular);
    font-size: 13px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

/* ============================================
   18. 空状态
   ============================================ */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.empty-state .icon { font-size: 40px; margin-bottom: 12px; opacity: 0.3; }
.empty-state h4 { font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.empty-state p { font-size: 12px; }

/* ============================================
   19. 登录页
   ============================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    padding: 20px;
}

.login-box {
    width: 100%;
    max-width: 360px;
    text-align: center;
}

.login-brand { margin-bottom: 28px; }

.login-brand .logo-icon {
    width: 56px;
    height: 56px;
    background: var(--primary);
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 24px;
    margin-bottom: 12px;
}

.login-brand h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
}

.login-brand p { font-size: 13px; color: var(--text-secondary); }

.login-form .form-group { margin-bottom: 14px; text-align: left; min-width: auto; }

.login-form .form-control { padding: 10px 14px; font-size: 14px; border-radius: 8px; }

.login-form .btn { width: 100%; padding: 10px; font-size: 14px; border-radius: 8px; margin-top: 4px; }
.login-form .btn.btn-lg { padding: 12px 24px; font-size: 16px; }

.login-links { margin-top: 16px; font-size: 12px; color: var(--text-secondary); }

.login-links a { color: var(--primary); }
.login-links span { margin: 0 6px; color: var(--border); }

/* 记住密码 */
.login-form input[type="checkbox"] { accent-color: var(--primary); }

/* 登录页切换动画 */
.page-transition {
    animation: loginSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes loginSlideIn {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* 登录页表单元素交错动画 */
.login-form .form-group {
    animation: formFieldIn 0.3s ease both;
}

.login-form .form-group:nth-child(1) { animation-delay: 0.05s; }
.login-form .form-group:nth-child(2) { animation-delay: 0.10s; }
.login-form .form-group:nth-child(3) { animation-delay: 0.15s; }
.login-form .form-group:nth-child(4) { animation-delay: 0.20s; }
.login-form .form-group:nth-child(5) { animation-delay: 0.25s; }

@keyframes formFieldIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ============================================
   20. 折叠面板
   ============================================ */
.accordion {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.accordion-item { border-bottom: 1px solid var(--border-light); }
.accordion-item:last-child { border-bottom: none; }

.accordion-header {
    padding: 12px 16px;
    background: #fafbfc;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    transition: background 0.15s;
    user-select: none;
}

.accordion-header:hover { background: #f0f1f5; }

.accordion-header i {
    transition: transform 0.3s ease;
    font-size: 12px;
    color: var(--text-secondary);
}

.accordion-header.active i { transform: rotate(180deg); }

.accordion-body {
    padding: 0 16px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background: #fff;
}

.accordion-body.show {
    max-height: 1000px;
    padding: 16px;
}

/* ============================================
   21. 下拉菜单
   ============================================ */
.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    min-width: 150px;
    display: none;
    z-index: 200;
}

.dropdown-menu.show { display: block; }

.dropdown-header {
    white-space: nowrap;
}

.dropdown-menu a, .dropdown-menu button {
    display: flex;
    align-items: center;
    padding: 10px 18px;
    color: var(--text-regular);
    font-size: 13px;
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    font-family: var(--font);
    gap: 10px;
    text-decoration: none;
}

.dropdown-menu a:hover, .dropdown-menu button:hover { background: var(--bg); color: var(--primary); }

.dropdown-menu .divider { height: 1px; background: var(--border-light); margin: 3px 0; }

.dropdown-menu .info-line {
    padding: 5px 14px;
    font-size: 11px;
    color: var(--text-secondary);
}

/* ============================================
   5.4.1 Google Chrome风格用户下拉框
   ============================================ */
.user-dropdown {
    min-width: 260px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    padding: 0;
    overflow: hidden;
}

.user-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-light);
}

.user-card-avatar {
    width: 64px;
    height: 64px;
    margin: 0 auto 12px;
    border-radius: 50%;
    overflow: hidden;
    background: #fff;
    border: 3px solid #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.user-card-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 600;
    color: var(--primary);
    background: #e8f4fd;
}

.user-card-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-regular);
    margin-bottom: 4px;
}

.user-card-meta {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.user-card-meta i {
    width: 14px;
    text-align: center;
}

.user-dropdown-body {
    padding: 8px 0;
}

.user-dropdown-body a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 18px;
    color: var(--text-regular);
    font-size: 13px;
    text-decoration: none;
    transition: background 0.15s;
}

.user-dropdown-body a:hover {
    background: var(--bg);
}

.user-dropdown-body a i {
    width: 18px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.user-dropdown-body a:hover i {
    color: var(--primary);
}

.user-dropdown-body a.logout-item {
    color: var(--danger);
}

.user-dropdown-body a.logout-item i {
    color: var(--danger);
}

.user-dropdown-body .dropdown-divider {
    height: 1px;
    background: var(--border-light);
    margin: 6px 12px;
}

/* ============================================
   5.5 顶部固定栏
   ============================================ */
.top-bar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: 48px;
    background: #fff;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 90;
    transition: left 0.3s ease;
}
.sidebar.collapsed ~ .main-content .top-bar {
    left: var(--sidebar-collapsed-width);
}

.top-bar-left { display: flex; align-items: center; }
.top-bar-right { display: flex; align-items: center; }

.user-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-regular);
    cursor: pointer;
    border: 1px solid var(--border);
    background: #fff;
    white-space: nowrap;
    transition: all 0.15s;
}
.user-btn:hover { border-color: var(--primary); color: var(--primary); }
.user-btn .user-avatar { width: 24px; height: 24px; border-radius: 50%; object-fit: cover; }

/* 主内容体（为顶部栏留出空间） */
.main-content-body {
    padding-top: 16px;
}

/* ============================================
   22. 弹窗 Modal
   ============================================ */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.modal-overlay.show {
    display: flex;
    opacity: 1;
}

.modal-box {
    background: #fff;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
    transform: translateY(-20px) scale(0.95);
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.show .modal-box {
    transform: translateY(0) scale(1);
}

.modal-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 { font-size: 15px; font-weight: 600; }

.modal-header .close-btn,
.modal-header .modal-close {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
}

.modal-header .close-btn:hover,
.modal-header .modal-close:hover { color: var(--text-regular); }

.modal-body { padding: 20px; }

.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ============================================
   22.1 页面切换和弹窗全局动画
   ============================================ */

/* 页面内容淡入 */
.main-content-body {
    animation: pageFadeIn 0.3s ease;
}

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

/* 弹窗打开动画 */
.modal-overlay.show .modal-box {
    animation: modalPopIn 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalPopIn {
    from { opacity: 0; transform: translateY(-30px) scale(0.92); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* 下拉菜单动画 */
.dropdown-menu.show {
    animation: dropdownSlideIn 0.18s ease;
}

@keyframes dropdownSlideIn {
    from { opacity: 0; transform: translateY(-6px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* 卡片进入动画 */
.card {
    animation: cardSlideIn 0.3s ease;
}

@keyframes cardSlideIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 表格行交错动画 */
.data-table tbody tr {
    animation: rowFadeIn 0.2s ease both;
}

.data-table tbody tr:nth-child(1) { animation-delay: 0.01s; }
.data-table tbody tr:nth-child(2) { animation-delay: 0.02s; }
.data-table tbody tr:nth-child(3) { animation-delay: 0.03s; }
.data-table tbody tr:nth-child(4) { animation-delay: 0.04s; }
.data-table tbody tr:nth-child(5) { animation-delay: 0.05s; }
.data-table tbody tr:nth-child(6) { animation-delay: 0.06s; }
.data-table tbody tr:nth-child(7) { animation-delay: 0.07s; }
.data-table tbody tr:nth-child(8) { animation-delay: 0.08s; }
.data-table tbody tr:nth-child(9) { animation-delay: 0.09s; }
.data-table tbody tr:nth-child(10) { animation-delay: 0.10s; }

@keyframes rowFadeIn {
    from { opacity: 0; transform: translateX(-8px); }
    to { opacity: 1; transform: translateX(0); }
}

/* 统计卡片交错动画 */
.stat-card {
    animation: statPopIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.stat-card:nth-child(1) { animation-delay: 0.05s; }
.stat-card:nth-child(2) { animation-delay: 0.10s; }
.stat-card:nth-child(3) { animation-delay: 0.15s; }
.stat-card:nth-child(4) { animation-delay: 0.20s; }

@keyframes statPopIn {
    from { opacity: 0; transform: scale(0.9) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

/* 按钮点击反馈 */
.btn:active {
    transform: scale(0.96);
    transition: transform 0.08s;
}

/* 链接悬停动画 */
a {
    transition: color 0.15s ease;
}

/* 输入框聚焦动画 */
.form-control:focus {
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

/* 标签切换动画 */
.tab-item {
    transition: all 0.2s ease;
}

/* ============================================
   19. 全局加载动画
   ============================================ */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.85);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 16px;
    backdrop-filter: blur(2px);
}
.loading-overlay.show {
    display: flex;
}
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: loadingSpin 0.8s linear infinite;
}
@keyframes loadingSpin {
    to { transform: rotate(360deg); }
}
.loading-text {
    font-size: 14px;
    color: var(--text-secondary);
    font-family: var(--font);
}

/* ============================================
   登录中按钮 - 彻底防止光标闪烁
   ============================================ */
.btn:disabled,
.btn:disabled * {
    cursor: wait !important;
    caret-color: transparent !important;
    outline: none !important;
    user-select: none !important;
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
}

/* 终极方案：disabled时按钮font-size归零，子元素恢复，消除按钮级别光标 */
#loginBtn:disabled,
#registerBtn:disabled,
#forgotBtn:disabled {
    font-size: 0 !important;
}

#loginBtn:disabled .btn-text,
#loginBtn:disabled .btn-spinner,
#registerBtn:disabled .btn-text,
#registerBtn:disabled .btn-spinner,
#forgotBtn:disabled .btn-text,
#forgotBtn:disabled .btn-spinner {
    font-size: 16px !important;
}

/* 登录中文字区域 - 双重保护 */
.btn-spinner {
    caret-color: transparent !important;
    user-select: none !important;
    -webkit-user-select: none !important;
    outline: none !important;
    pointer-events: none !important;
}

/* 按钮聚焦时不显示轮廓 */
.btn:focus,
.btn:focus-visible,
.btn:active:focus {
    outline: none !important;
    box-shadow: none !important;
}

/* ============================================
   23. 右键菜单
   ============================================ */
.context-menu {
    position: fixed;
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    min-width: 160px;
    padding: 4px 0;
    z-index: 9999;
    animation: contextMenuIn 0.15s ease;
}

@keyframes contextMenuIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.context-menu a {
    display: flex;
    align-items: center;
    padding: 8px 14px;
    color: var(--text-regular);
    font-size: 13px;
    text-decoration: none;
    transition: background 0.1s;
    gap: 8px;
}

.context-menu a:hover {
    background: var(--bg);
    color: var(--primary);
}

.context-menu .divider {
    height: 1px;
    background: var(--border-light);
    margin: 3px 0;
}

/* ============================================
   24. 响应式
   ============================================ */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
        padding: 12px;
        max-width: 100vw;
    }
    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .pagination-wrap {
        flex-direction: column;
        gap: 8px;
        align-items: stretch;
    }
}

/* ============================================
   25. 滚动条
   ============================================ */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #c0c4cc; border-radius: 3px; }

/* ============================================
   26. 金额颜色
   ============================================ */
.text-income { color: var(--success); }
.text-expense { color: var(--danger); }
.text-balance { color: var(--primary); }
.text-gray { color: var(--text-secondary); font-size: 12px; }

/* ============================================
   27. 行内编辑
   ============================================ */
.inline-edit {
    display: flex;
    gap: 6px;
    align-items: center;
}

.inline-edit input {
    flex: 1;
    padding: 4px 8px;
   

/* ============================================
   28. 浏览器风格Tab栏 (Browser Tab Bar)
   ============================================ */

/* Tab栏容器 - 位于top-bar下方 */
.tab-bar-container {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    background: #f0f1f5;
    border-bottom: 1px solid var(--border-light);
    padding: 0 0 0 12px;
    height: 40px;
    flex-shrink: 0;
}

/* Tab列表 */
.tab-list {
    display: flex;
    align-items: flex-end;
    gap: 2px;
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    height: 100%;
    padding-top: 4px;
}

/* Tab列表滚动条隐藏 */
.tab-list::-webkit-scrollbar { display: none; }

/* 浏览器风格Tab项 */
.browser-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 6px 6px 0 0;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    background: #e4e6eb;
    border: 1px solid transparent;
    border-bottom: none;
    white-space: nowrap;
    transition: all 0.15s ease;
    max-width: 160px;
    min-width: 80px;
    position: relative;
    user-select: none;
    height: 32px;
    line-height: 1;
    font-family: var(--font);
}

.browser-tab:hover {
    background: #d8dbe1;
    color: var(--text-regular);
}

.browser-tab.active {
    background: #fff;
    color: var(--primary);
    font-weight: 500;
    border-color: var(--border-light);
    border-bottom: 1px solid #fff;
    margin-bottom: -1px;
    z-index: 1;
}

/* Tab标题 */
.browser-tab-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

/* Tab关闭按钮 */
.browser-tab-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    font-size: 13px;
    line-height: 1;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
    flex-shrink: 0;
    padding-bottom: 1px;
}

.browser-tab-close:hover {
    background: var(--danger);
    color: #fff;
}

/* Tab操作按钮 */
.tab-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
    padding: 0 8px;
    border-left: 1px solid var(--border-light);
    height: 100%;
}

.tab-close-all {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    font-size: 14px;
    border-radius: 4px;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tab-close-all:hover {
    color: var(--danger);
    background: rgba(245, 108, 108, 0.1);
}

/* Tab内容区域 */
.tab-content-area {
    flex: 1;
    overflow: hidden;
    position: relative;
    min-height: 0;
    background: var(--bg);
}

/* Tab iframe */
.tab-iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: none;
    background: #fff;
}

.tab-iframe.active {
    display: block;
}

/* ============================================
   29. Iframe内页面样式适配
   ============================================ */

/* 当页面在iframe中时，通过JS动态添加此类 */
body.iframe-mode .sidebar,
body.iframe-mode .top-bar,
body.iframe-mode .tab-bar-container {
    display: none !important;
}

body.iframe-mode .main-content {
    margin-left: 0 !important;
    padding: 16px 20px !important;
    max-width: 100vw !important;
}

/* ============================================
   30. 响应式适配（Tab栏）
   ============================================ */

@media (max-width: 768px) {
    .tab-bar-container {
        padding: 0 0 0 8px;
    }
    .browser-tab {
        padding: 5px 8px;
        font-size: 11px;
        max-width: 120px;
        min-width: 60px;
    }
    .tab-content-area {
        /* 移动端无需额外padding调整 */
    }
}