/* 共用样式:总后台/用户后台 复用 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary: #1890ff;
    --primary-hover: #40a9ff;
    --primary-light: #e6f7ff;
    --danger: #ff4d4f;
    --warning: #faad14;
    --success: #52c41a;
    --bg: #f0f2f5;
    --surface: #fff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}

.header {
    background: var(--surface);
    padding: 14px 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    display: flex; justify-content: space-between; align-items: center;
    position: sticky; top: 0; z-index: 50;
}
.header h1 { font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }
.header h1 small { font-size: 13px; color: var(--text-muted); font-weight: normal; margin-left: 8px; }
.header .nav { display: flex; gap: 18px; align-items: center; }
.header .nav a { color: var(--text-secondary); font-size: 14px; text-decoration: none; transition: color .2s; }
.header .nav a:hover { color: var(--primary); }
.header .nav a.active { color: var(--primary); font-weight: 500; }

.container { max-width: 1200px; margin: 24px auto; padding: 0 16px; }

.card {
    background: var(--surface);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    transition: box-shadow .2s;
}
.card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
.card h3 { margin-bottom: 16px; font-size: 15px; font-weight: 600; }
.card-nopad { padding: 0; overflow-x: auto; }

.form-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: end; }
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group label { font-size: 13px; color: var(--text-secondary); font-weight: 500; }
.form-group input, .form-group select, .form-group textarea {
    padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px;
    font-size: 14px; transition: border-color .2s, box-shadow .2s; outline: none;
    font-family: inherit; width: 100%; box-sizing: border-box;
}
select.select-wide { min-width: 240px; }
.force-form { font-size: 12px; }
.force-label { font-size: 12px; color: var(--text-secondary); white-space: nowrap; }
.force-hint { color: var(--text-muted); font-size: 12px; white-space: nowrap; }
input.filter-date { border: 1px solid var(--border); border-radius: 6px; padding: 5px 10px; font-size: 13px; color: var(--text); background: var(--surface-1); }
[data-theme="dark"] input.filter-date { color: var(--text); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary); box-shadow: 0 0 0 3px rgba(24,144,255,0.12);
}

.btn {
    padding: 8px 16px; border: none; border-radius: 6px;
    font-size: 14px; font-weight: 500; cursor: pointer;
    transition: all .2s; display: inline-flex; align-items: center; gap: 4px;
    font-family: inherit; text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); box-shadow: 0 2px 8px rgba(24,144,255,0.35); transform: translateY(-1px); }
.btn-danger { background: var(--danger); color: #fff; font-size: 12px; padding: 5px 12px; }
.btn-danger:hover { background: #ff7875; }
.btn-warning { background: var(--warning); color: #fff; font-size: 12px; padding: 5px 12px; }
.btn-warning:hover { background: #ffc53d; }
.btn-success { background: var(--success); color: #fff; font-size: 12px; padding: 5px 12px; }
.btn-success:hover { background: #73d13d; }
.btn-sm { font-size: 12px; padding: 4px 10px; }
.btn-telegram { background: #0088cc; color: #fff; }
.btn-telegram:hover { background: #0099e6; }
.btn-secondary { background: var(--surface-2); color: var(--text-secondary); border: 1px solid var(--border); font-size: 12px; padding: 4px 10px; }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
.btn-info { background: #13c2c2; color: #fff; font-size: 12px; padding: 5px 12px; }
.btn-info:hover { background: #36cfc9; }

.msg { padding: 10px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.msg-success { background: #f6ffed; color: var(--success); border: 1px solid #b7eb8f; }
.msg-error { background: #fff2f0; color: var(--danger); border: 1px solid #ffccc7; }
.msg-warning { background: #fffbe6; color: var(--warning); border: 1px solid #ffe58f; }

.toolbar { display: flex; gap: 8px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }
.toolbar.toolbar-center { justify-content: center; margin-top: 20px; }
.toolbar a, .toolbar span.filter-label {
    padding: 6px 14px; border-radius: 6px; font-size: 13px; font-weight: 500;
    text-decoration: none; border: 1px solid var(--border); color: var(--text-secondary);
    transition: all .2s;
}
.toolbar a:hover, .tab-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-label-flat { border: none !important; background: transparent !important; }
.toolbar a.active, .tab-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.tab-btn {
    padding: 6px 14px; border-radius: 6px; font-size: 13px; font-weight: 500;
    border: 1px solid var(--border); color: var(--text-secondary); background: transparent;
    cursor: pointer; transition: all .2s;
}
.toolbar input, .toolbar select {
    padding: 6px 12px; border: 1px solid var(--border); border-radius: 6px;
    font-size: 13px; outline: none;
}
.toolbar input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(24,144,255,0.12); }

table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 13px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: #f8fafc; color: var(--text-secondary); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; white-space: nowrap; }
tr:hover td { background: #f8fafc; }
tbody tr:last-child td { border-bottom: none; }
td { color: var(--text); }
tr.total-row { background: var(--primary-light); font-weight: 600; }
tr.total-row td { border-top: 2px solid var(--primary); }

.num { text-align: right; font-variant-numeric: tabular-nums; }
.num.green, .status-on { color: var(--success); font-weight: 600; }
.num.red, .status-off { color: var(--danger); }
.num.blue { color: var(--primary); }
.num.gray { color: var(--text-muted); }
.num.orange { color: var(--warning); }
.num.purple { color: #722ed1; }

.actions { display: flex; gap: 6px; flex-wrap: wrap; }
.actions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; align-items: center; justify-items: start; }
.copy-btn {
    background: none; border: 1px solid var(--border);
    padding: 3px 10px; border-radius: 5px; cursor: pointer;
    font-size: 12px; color: var(--text-secondary); transition: all .2s;
}
.copy-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.expire-warn { color: var(--danger); font-size: 12px; }
.expire-soon { color: var(--warning); font-size: 12px; }
.count { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; font-weight: 500; }

.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-item {
    background: var(--surface); border-radius: 10px; padding: 18px 14px; text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    transition: all .25s; border: 1px solid transparent;
}
.stat-item:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.10); border-color: var(--border); }
.stat-item .num-big { font-size: 24px; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; overflow-wrap: break-word; word-break: break-all; }
.stat-item .num-big.green { color: var(--success); }
.stat-item .num-big.red { color: var(--danger); }
.stat-item .num-big.blue { color: var(--primary); }
.stat-item .num-big.orange { color: var(--warning); }
.stat-item .num-big.purple { color: #722ed1; }
.stat-item .num-big.gray { color: var(--text-muted); }
.stat-item .label { font-size: 12px; color: var(--text-secondary); font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; }

/* Telegram 购买弹窗 */
.modal-mask {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.5); z-index: 100;
    justify-content: center; align-items: center;
}
.modal-mask.show { display: flex; }
.modal {
    background: #fff; border-radius: 12px; padding: 32px;
    max-width: 420px; width: 90%; text-align: center;
    box-shadow: 0 16px 48px rgba(0,0,0,0.18);
}
.modal h3 { font-size: 18px; margin-bottom: 8px; color: var(--text); }
.modal p { color: var(--text-secondary); font-size: 14px; margin-bottom: 20px; line-height: 1.6; }
.modal .tg-link {
    background: var(--bg); padding: 12px; border-radius: 8px;
    font-family: monospace; font-size: 13px; margin-bottom: 16px;
    word-break: break-all; cursor: pointer; border: 1px solid var(--border);
}
.modal .actions { display: flex; gap: 8px; justify-content: center; }
.modal .btn { flex: 1; justify-content: center; padding: 10px; }

/* ============================================================
   v2 增量样式 (零侵入追加,不影响现有页面)
   - 间距/字号/圆角/阴影/动效变量系统
   - 深色模式 (prefers-color-scheme + data-theme 手动切换)
   - :focus-visible 键盘焦点
   - Toast / 空状态 / 骨架屏
   - 表格横向滚动
   - prefers-reduced-motion 动效降级
   - 移动端 padding 收缩
   ============================================================ */

:root {
    /* 间距系统(4 的倍数) */
    --space-1: 4px;  --space-2: 8px;  --space-3: 12px;
    --space-4: 16px; --space-5: 20px; --space-6: 24px;
    --space-8: 32px;

    /* 字号系统 */
    --fs-xs: 12px; --fs-sm: 13px; --fs-base: 14px;
    --fs-lg: 16px; --fs-xl: 18px; --fs-2xl: 24px;

    /* 圆角 */
    --radius-sm: 4px; --radius-md: 6px; --radius-lg: 10px; --radius-xl: 16px;

    /* 阴影分级 */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.18);

    /* 动效 */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --t-fast: 150ms; --t-base: 200ms; --t-slow: 300ms;

    /* 主题扩展 */
    --surface-2: #f8fafc;
    --border-strong: #cbd5e1;
    --primary-bg: rgba(24,144,255,0.08);
}

/* 深色模式:跟随系统 */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #0b1220;
        --surface: #131a2b;
        --surface-2: #1a2236;
        --text: #e2e8f0;
        --text-secondary: #94a3b8;
        --text-muted: #64748b;
        --border: #1e293b;
        --border-strong: #334155;
        --primary-light: rgba(24,144,255,0.16);
        --primary-bg: rgba(24,144,255,0.12);
        --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
        --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
        --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
        --msg-success-bg: rgba(82,196,26,0.12);
        --msg-success-border: rgba(82,196,26,0.3);
        --msg-error-bg: rgba(255,77,79,0.12);
        --msg-error-border: rgba(255,77,79,0.3);
        --msg-warning-bg: rgba(250,173,20,0.12);
        --msg-warning-border: rgba(250,173,20,0.3);
    }
}
/* 深色模式:手动覆盖 */
[data-theme="dark"] {
    --bg: #0b1220;
    --surface: #131a2b;
    --surface-2: #1a2236;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #1e293b;
    --border-strong: #334155;
    --primary-light: rgba(24,144,255,0.16);
    --primary-bg: rgba(24,144,255,0.12);
    --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
    --msg-success-bg: rgba(82,196,26,0.12);
    --msg-success-border: rgba(82,196,26,0.3);
    --msg-error-bg: rgba(255,77,79,0.12);
    --msg-error-border: rgba(255,77,79,0.3);
    --msg-warning-bg: rgba(250,173,20,0.12);
    --msg-warning-border: rgba(250,173,20,0.3);
}

/* 深色模式下 message 容器背景适配 */
.msg-success { background: var(--msg-success-bg, #f6ffed); border-color: var(--msg-success-border, #b7eb8f); }
.msg-error   { background: var(--msg-error-bg, #fff2f0);   border-color: var(--msg-error-border, #ffccc7); }
.msg-warning { background: var(--msg-warning-bg, #fffbe6); border-color: var(--msg-warning-border, #ffe58f); }

/* 深色模式:覆盖原 CSS 中硬编码的浅色背景(table 表头、hover 行、登录页等) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) th { background: var(--surface-2); color: var(--text-secondary); }
    :root:not([data-theme="light"]) tr:hover td { background: var(--surface-2); }
}
[data-theme="dark"] th { background: var(--surface-2); color: var(--text-secondary); }
[data-theme="dark"] tr:hover td { background: var(--surface-2); }

/* 深色模式:覆盖原 CSS 中硬编码白色的 input/select/textarea 背景 */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .form-group input,
    :root:not([data-theme="light"]) .form-group select,
    :root:not([data-theme="light"]) .form-group textarea,
    :root:not([data-theme="light"]) .toolbar input,
    :root:not([data-theme="light"]) .toolbar select,
    :root:not([data-theme="light"]) .login-box input,
    :root:not([data-theme="light"]) td input,
    :root:not([data-theme="light"]) td select {
        background: var(--surface-2);
        color: var(--text);
        border-color: var(--border);
    }
    :root:not([data-theme="light"]) .form-group input::placeholder,
    :root:not([data-theme="light"]) .login-box input::placeholder,
    :root:not([data-theme="light"]) .toolbar input::placeholder { color: var(--text-muted); }
}
[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group select,
[data-theme="dark"] .form-group textarea,
[data-theme="dark"] .toolbar input,
[data-theme="dark"] .toolbar select,
[data-theme="dark"] .login-box input,
[data-theme="dark"] td input,
[data-theme="dark"] td select {
    background: var(--surface-2);
    color: var(--text);
    border-color: var(--border);
}
[data-theme="dark"] .form-group input::placeholder,
[data-theme="dark"] .login-box input::placeholder,
[data-theme="dark"] .toolbar input::placeholder { color: var(--text-muted); }

/* ============================================================
   键盘焦点 (仅键盘可见,鼠标点击不显示)
   ============================================================ */
.form-group input:focus-visible,
.form-group select:focus-visible,
.form-group textarea:focus-visible,
.toolbar input:focus-visible,
.toolbar select:focus-visible,
.login-box input:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(24,144,255,0.18);
}
.btn:focus-visible,
.toolbar a:focus-visible,
.copy-btn:focus-visible,
.theme-toggle:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ============================================================
   Toast / Snackbar
   ============================================================ */
.toast-container {
    position: fixed; top: 80px; right: 24px;
    z-index: 1000;
    display: flex; flex-direction: column; gap: 8px;
    pointer-events: none;
    max-width: calc(100vw - 32px);
}
.toast {
    pointer-events: auto;
    background: var(--surface);
    color: var(--text);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    min-width: 240px; max-width: 360px;
    box-shadow: var(--shadow-md);
    border-left: 3px solid var(--primary);
    display: flex; align-items: center; gap: 10px;
    font-size: var(--fs-base);
    animation: toast-in 220ms var(--ease);
}
.toast-success { border-left-color: var(--success); }
.toast-error   { border-left-color: var(--danger); }
.toast-warning { border-left-color: var(--warning); }
.toast .toast-icon {
    width: 18px; height: 18px; flex-shrink: 0;
    display: inline-flex;
}
.toast .toast-icon svg { width: 100%; height: 100%; }
.toast-success .toast-icon { color: var(--success); }
.toast-error   .toast-icon { color: var(--danger); }
.toast-warning .toast-icon { color: var(--warning); }
.toast-info    .toast-icon { color: var(--primary); }
.toast.fade-out { animation: toast-out 200ms var(--ease) forwards; }

@keyframes toast-in {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes toast-out {
    to { opacity: 0; transform: translateX(20px); }
}

/* ============================================================
   空状态 / 骨架屏 / 加载
   ============================================================ */
.empty-state {
    text-align: center; padding: 64px 24px;
    color: var(--text-muted);
}
.empty-state svg { width: 80px; height: 80px; opacity: 0.4; margin-bottom: 16px; color: var(--text-muted); }
.empty-state .empty-title { font-size: var(--fs-base); color: var(--text-secondary); margin-bottom: 6px; font-weight: 500; }
.empty-state .empty-desc  { font-size: var(--fs-sm); margin-bottom: 16px; line-height: 1.6; }
.empty-state .empty-actions { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }

.skeleton {
    background: linear-gradient(90deg,
        var(--surface-2) 25%,
        var(--border) 50%,
        var(--surface-2) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.4s ease-in-out infinite;
    border-radius: var(--radius-sm);
    color: transparent !important;
    user-select: none;
}
.skeleton-line { height: 14px; margin: 8px 0; }
.skeleton-circle { width: 40px; height: 40px; border-radius: 50%; }
@keyframes skeleton-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.spinner {
    width: 16px; height: 16px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 700ms linear infinite;
    display: inline-block; vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   表格横向滚动条美化
   ============================================================ */
.card-nopad { position: relative; }
.card-nopad > .table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.card-nopad > .table-scroll::-webkit-scrollbar { height: 6px; }
.card-nopad > .table-scroll::-webkit-scrollbar-track { background: transparent; }
.card-nopad > .table-scroll::-webkit-scrollbar-thumb {
    background: var(--border-strong); border-radius: 3px;
}
.card-nopad > .table-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ============================================================
   主题切换按钮 (放在 header)
   ============================================================ */
.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    width: 32px; height: 32px;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--text-secondary);
    display: inline-flex; align-items: center; justify-content: center;
    transition: color var(--t-base) var(--ease), border-color var(--t-base) var(--ease), background var(--t-base) var(--ease);
}
.theme-toggle:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-bg);
}
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
    :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

/* ============================================================
   响应式 — 移动端 padding 收缩
   ============================================================ */
@media (max-width: 767px) {
    .container { padding: 0 12px; margin: 16px auto; }
    .header { padding: 10px 12px; flex-wrap: wrap; gap: 8px; }
    .header h1 { font-size: var(--fs-base); flex-shrink: 0; }
    .header h1 small { display: none; }
    .header .nav { gap: 10px; flex-wrap: nowrap; }
    .header .nav a { font-size: var(--fs-xs); white-space: nowrap; }
    .header .nav .theme-toggle { width: 28px; height: 28px; }
    .card { padding: 14px; margin-bottom: 12px; border-radius: var(--radius-md); }
    .stats { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .stat-item { padding: 14px 8px; }
    .stat-item .num-big { font-size: var(--fs-xl); }
    .form-row { flex-direction: column; align-items: stretch; }
    .form-row > * { width: 100%; }
    .form-group input,
    .form-group select,
    .form-group textarea { width: 100%; }
    .toolbar { gap: 6px; }
    .toolbar a, .toolbar span.filter-label { padding: 5px 10px; font-size: var(--fs-xs); }
    table { font-size: var(--fs-xs); }
    th, td { padding: 8px 10px; }
    .modal { padding: 20px; }
    .toast-container { top: 70px; right: 12px; left: 12px; }
    .toast { min-width: 0; max-width: 100%; }
}
@media (max-width: 480px) {
    .stats { grid-template-columns: 1fr; }
    .form-row .btn { width: 100%; justify-content: center; }
}

/* ============================================================
   prefers-reduced-motion: 动效降级
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .card:hover, .stat-item:hover { transform: none !important; }
}

/* ============================================================
   v3 增量样式 (第二批)
   - .responsive-table 移动端表格转卡片
   - .empty-state 完整组件(SVG + 文案)
   - .breadcrumb 面包屑
   - 高频工具类 .inline-form / .nowrap / .input-xs / .filter-sep
   - Telegram 弹窗 hero 区
   ============================================================ */

/* ---------- 表格响应式:移动端转卡片视图 ---------- */
.table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.table-wrap::-webkit-scrollbar { height: 6px; }
.table-wrap::-webkit-scrollbar-track { background: transparent; }
.table-wrap::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
.table-wrap::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

@media (max-width: 767px) {
    table.responsive-table { border-spacing: 0; }
    /* 隐藏 thead 行(支持两种情况:显式 thead / 浏览器推断 th 进 tbody) */
    table.responsive-table thead,
    table.responsive-table tr:has(> th) { display: none; }
    table.responsive-table,
    table.responsive-table tbody,
    table.responsive-table tr,
    table.responsive-table td { display: block; width: 100%; }
    table.responsive-table tr {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        margin-bottom: 10px;
        padding: 4px 0;
        box-shadow: var(--shadow-sm);
    }
    table.responsive-table tr:hover td { background: transparent; }
    table.responsive-table td {
        padding: 8px 14px;
        border: none;
        border-bottom: 1px solid var(--border);
        display: flex; justify-content: space-between; align-items: center; gap: 12px;
        text-align: right;
    }
    table.responsive-table td:last-child { border-bottom: none; }
    table.responsive-table td::before {
        content: attr(data-label);
        color: var(--text-secondary);
        font-size: var(--fs-xs);
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        flex-shrink: 0;
        text-align: left;
    }
    /* td 内容(右半边)允许换行 */
    table.responsive-table td > * { text-align: right; }
    table.responsive-table td.no-label::before { content: none; }
    table.responsive-table td.actions-cell { justify-content: flex-end; }
    table.responsive-table td.actions-cell::before { display: none; }
    table.responsive-table td.actions-cell .actions { justify-content: flex-end; }
    /* 空状态 td 在移动端占满 */
    table.responsive-table td.empty-cell {
        display: block; text-align: center !important; padding: 48px 14px;
    }
    table.responsive-table td.empty-cell::before { content: none; }
}

/* ---------- 空状态组件 ---------- */
.empty-state {
    text-align: center; padding: 56px 24px;
    color: var(--text-muted);
}
.empty-state svg.empty-icon {
    width: 72px; height: 72px;
    color: var(--text-muted);
    opacity: 0.45;
    margin: 0 auto 14px;
    display: block;
}
.empty-state .empty-title {
    font-size: var(--fs-base);
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}
.empty-state .empty-desc {
    font-size: var(--fs-sm);
    margin-bottom: 16px;
    line-height: 1.6;
    max-width: 320px;
    margin-left: auto; margin-right: auto;
}
.empty-state .empty-actions {
    display: flex; gap: 8px; justify-content: center; flex-wrap: wrap;
}
.empty-state.empty-sm { padding: 32px 16px; }
.empty-state.empty-sm svg.empty-icon { width: 48px; height: 48px; margin-bottom: 8px; }

/* ---------- 面包屑 ---------- */
.breadcrumb {
    display: flex; align-items: center; gap: 6px;
    font-size: var(--fs-sm); color: var(--text-muted);
    margin-bottom: 14px;
    flex-wrap: wrap;
}
.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--t-base) var(--ease);
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--text-muted); user-select: none; }
.breadcrumb .current { color: var(--text); font-weight: 500; }

/* ---------- 高频工具类(替换 inline style) ---------- */
.inline-form-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.inline-form { display: inline; }
.nowrap { white-space: nowrap; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.text-center  { text-align: center; }
.text-right   { text-align: right; }
.filter-sep   { color: var(--border-strong); user-select: none; padding: 0 4px; }

.input-xs {
    padding: 4px 6px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: var(--fs-xs);
    background: transparent;
    color: inherit;
    outline: none;
    transition: border-color var(--t-base) var(--ease);
}
.input-xs:focus { border-color: var(--primary); }

.row-focused { background: #fff7e6 !important; }
[data-theme="dark"] .row-focused { background: rgba(250,173,20,0.12) !important; }
.row-deleted { background: #fffbe6; color: var(--text-muted); }
[data-theme="dark"] .row-deleted { background: rgba(250,173,20,0.10); }
.tag-deleted {
    background: var(--warning); color: #fff;
    font-size: 10px; padding: 2px 6px; border-radius: 3px;
    margin-left: 4px; vertical-align: middle;
}
.cell-ellipsis {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.cell-mono { font-family: 'Fira Code', 'SF Mono', Consolas, monospace; font-size: var(--fs-xs); }

/* 状态标签(流水原因等) */
.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: var(--fs-xs);
    font-weight: 500;
    line-height: 1.4;
}
.tag-success { background: rgba(82,196,26,0.12); color: var(--success); }
.tag-danger  { background: rgba(255,77,79,0.12); color: var(--danger); }
.tag-muted   { background: var(--surface-2); color: var(--text-muted); }

/* 颜色 + 字号工具类 */
.text-warning { color: var(--warning); }
.text-warning-soft { color: #6b3410; }
[data-theme="dark"] .text-warning-soft { color: #fcd99c; }
.fw-600 { font-weight: 600; }
.stat-clickable { cursor: pointer; }

/* 警示色卡片(购买链接引导) */
.card-warning {
    background: linear-gradient(135deg, #fff8e1, #fff3e0);
    border: 1px solid #ffe082;
}
.card-warning h3 { color: #e65100; }
[data-theme="dark"] .card-warning {
    background: linear-gradient(135deg, rgba(250,173,20,0.08), rgba(250,173,20,0.04));
    border-color: rgba(250,173,20,0.3);
}
[data-theme="dark"] .card-warning h3 { color: var(--warning); }

/* settings.php 配置项最大宽度 */
.form-group.form-wide { max-width: 600px; margin-bottom: 14px; }
.form-group.form-narrow { max-width: 200px; margin-bottom: 14px; }

/* settings 说明列表 */
.tip-list { line-height: 2; color: var(--text-secondary); padding-left: 20px; margin: 0; }

/* 环境变量覆盖提示(settings.php) */
.env-override-hint {
    margin-top: 6px;
    padding: 8px 12px;
    background: rgba(250,173,20,0.08);
    border-left: 3px solid var(--warning);
    border-radius: 4px;
    font-size: var(--fs-xs);
    color: var(--text-secondary);
    line-height: 1.6;
}
.env-override-hint code {
    background: var(--bg);
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 11px;
    font-family: 'Fira Code', 'SF Mono', Consolas, monospace;
    color: var(--text);
}
[data-theme="dark"] .env-override-hint { background: rgba(250,173,20,0.10); }
.collapse-form {
    margin-top: 8px;
    padding: 10px;
    background: var(--bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}
[data-theme="dark"] .collapse-form { background: var(--surface-2); }

.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }

/* ---------- Telegram 弹窗 hero 区 ---------- */
.modal .tg-hero {
    background: linear-gradient(135deg, #0088cc 0%, #00aaff 100%);
    color: #fff;
    padding: 24px 20px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    margin: -32px -32px 20px;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    position: relative;
    overflow: hidden;
}
.modal .tg-hero::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at top right, rgba(255,255,255,0.18), transparent 60%);
    pointer-events: none;
}
.modal .tg-hero svg { width: 40px; height: 40px; fill: #fff; opacity: 0.95; position: relative; z-index: 1; }
.modal .tg-hero .tg-title { font-size: var(--fs-lg); font-weight: 600; position: relative; z-index: 1; }
.modal .tg-hero .tg-sub   { font-size: var(--fs-sm); opacity: 0.92; position: relative; z-index: 1; }
.modal .username-chip {
    display: inline-block;
    background: var(--primary-bg);
    color: var(--primary);
    padding: 4px 12px; border-radius: 20px;
    font-weight: 600; font-family: monospace; font-size: var(--fs-base);
}
.modal .tg-link {
    background: var(--surface-2);
    padding: 12px 14px; border-radius: var(--radius-md);
    font-family: 'Fira Code', 'SF Mono', Consolas, monospace;
    font-size: var(--fs-sm); margin: 12px 0 16px;
    word-break: break-all; cursor: pointer;
    border: 1px dashed var(--border-strong);
    transition: all var(--t-base) var(--ease);
    color: var(--text);
}
.modal .tg-link:hover {
    border-style: solid; border-color: #0088cc;
    background: var(--primary-bg);
}
.modal .tg-link-hint {
    font-size: var(--fs-xs); color: var(--text-muted); margin-top: -8px; margin-bottom: 16px;
}

/* 调整 modal 让 hero 区圆角不被裁剪 */
.modal { overflow: hidden; padding: 32px; }

/* ============================================================
   v4 增量样式 (第三批 - 经典后台布局)
   - .layout 容器:左侧 sidebar + 顶部 topbar + 主内容
   - .sidebar 固定宽度 220px,可分组折叠
   - .topbar 高度 56px,放面包屑、用户菜单、主题切换
   - .main-content 自适应剩余宽度,最大宽度限制
   - 移动端 sidebar 抽屉式 + 遮罩
   ============================================================ */

:root {
    --sidebar-width: 220px;
    --topbar-height: 56px;
    --sidebar-bg: #001529;
    --sidebar-text: rgba(255,255,255,0.75);
    --sidebar-text-active: #fff;
    --sidebar-item-hover: rgba(255,255,255,0.08);
    --sidebar-item-active: var(--primary);
    --sidebar-group-bg: rgba(255,255,255,0.04);
    --sidebar-border: rgba(255,255,255,0.06);
}

[data-theme="dark"] {
    --sidebar-bg: #0a0f1c;
    --sidebar-text: #94a3b8;
    --sidebar-text-active: #e2e8f0;
    --sidebar-item-hover: rgba(255,255,255,0.06);
}

/* ---------- 整体布局容器 ---------- */
.layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: var(--topbar-height) 1fr;
    grid-template-areas:
        "sidebar topbar"
        "sidebar main";
    min-height: 100vh;
}

/* ---------- 侧边栏 ---------- */
.sidebar {
    grid-area: sidebar;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    overflow-y: auto;
    overflow-x: hidden;
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    transition: transform 220ms var(--ease);
    z-index: 60;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 3px; }
.sidebar::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.24); }

.sidebar-brand {
    padding: 16px 20px;
    border-bottom: 1px solid var(--sidebar-border);
    display: flex; align-items: center; gap: 10px;
    flex-shrink: 0;
}
.sidebar-brand .logo {
    width: 28px; height: 28px;
    background: var(--primary);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 700; font-size: 14px;
}
.sidebar-brand .brand-text {
    font-size: 15px; font-weight: 600;
    color: var(--sidebar-text-active);
    letter-spacing: 0.02em;
}
.sidebar-brand .brand-text small {
    display: block;
    font-size: 11px;
    font-weight: normal;
    color: var(--sidebar-text);
    opacity: 0.7;
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}
.sidebar-nav .nav-section {
    padding: 12px 20px 6px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: rgba(255,255,255,0.4);
    font-weight: 600;
}

/* sidebar item(单条) */
.sidebar-nav .nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: var(--fs-sm);
    border-left: 3px solid transparent;
    transition: all var(--t-fast) var(--ease);
    cursor: pointer;
    line-height: 1.4;
}
.sidebar-nav .nav-item:hover {
    background: var(--sidebar-item-hover);
    color: var(--sidebar-text-active);
}
.sidebar-nav .nav-item.active {
    background: var(--sidebar-item-hover);
    color: var(--sidebar-text-active);
    border-left-color: var(--primary);
    font-weight: 500;
}
.sidebar-nav .nav-item .nav-icon {
    width: 16px; height: 16px;
    flex-shrink: 0;
    opacity: 0.85;
}
.sidebar-nav .nav-item.active .nav-icon { opacity: 1; }

/* sidebar group(可折叠组) */
.sidebar-nav .nav-group {
    margin-bottom: 4px;
}
.sidebar-nav .nav-group > .nav-group-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--sidebar-text);
    font-size: var(--fs-sm);
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: all var(--t-fast) var(--ease);
    background: none;
    border-top: none; border-right: none; border-bottom: none;
    width: 100%; text-align: left;
    font-family: inherit;
}
.sidebar-nav .nav-group > .nav-group-toggle:hover {
    background: var(--sidebar-item-hover);
    color: var(--sidebar-text-active);
}
.sidebar-nav .nav-group.open > .nav-group-toggle {
    color: var(--sidebar-text-active);
    background: var(--sidebar-group-bg);
}
.sidebar-nav .nav-group > .nav-group-toggle .nav-icon {
    width: 16px; height: 16px; flex-shrink: 0;
}
.sidebar-nav .nav-group > .nav-group-toggle .nav-arrow {
    margin-left: auto;
    transition: transform var(--t-fast) var(--ease);
    width: 12px; height: 12px;
}
.sidebar-nav .nav-group.open > .nav-group-toggle .nav-arrow {
    transform: rotate(90deg);
}
.sidebar-nav .nav-group > .nav-children {
    max-height: 0;
    overflow: hidden;
    transition: max-height 240ms var(--ease);
}
.sidebar-nav .nav-group.open > .nav-children {
    max-height: 400px;
}
.sidebar-nav .nav-group .nav-item {
    padding-left: 46px;
    font-size: var(--fs-xs);
}
.sidebar-nav .nav-group .nav-item.active {
    background: var(--sidebar-item-hover);
    border-left-color: var(--primary);
}

/* 侧边栏醒目按钮式 item（如订单明细） */
.sidebar-nav .nav-item-accent {
    margin: 6px 10px;
    padding: 10px 16px;
    border-radius: 6px;
    background: linear-gradient(135deg, rgba(24,144,255,0.2), rgba(24,144,255,0.08));
    border: 1px solid rgba(24,144,255,0.3);
    border-left: 3px solid var(--primary);
    color: var(--sidebar-text-active) !important;
    font-weight: 600;
    gap: 8px;
    transition: all 0.2s ease;
}
.sidebar-nav .nav-item-accent:hover {
    background: linear-gradient(135deg, rgba(24,144,255,0.35), rgba(24,144,255,0.15));
    border-color: rgba(24,144,255,0.5);
    transform: translateX(2px);
}
.sidebar-nav .nav-item-accent.active {
    background: linear-gradient(135deg, rgba(24,144,255,0.35), rgba(24,144,255,0.15));
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(24,144,255,0.15);
}

.sidebar-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--sidebar-border);
    font-size: var(--fs-xs);
    color: rgba(255,255,255,0.4);
    flex-shrink: 0;
}

/* ---------- 顶部 topbar ---------- */
.topbar {
    grid-area: topbar;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    height: var(--topbar-height);
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 40;
    box-shadow: 0 1px 2px rgba(0,0,0,0.02);
}

.topbar .menu-toggle {
    display: none;
    background: none; border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: background var(--t-fast) var(--ease);
}
.topbar .menu-toggle:hover { background: var(--primary-bg); color: var(--primary); }
.topbar .menu-toggle svg { width: 20px; height: 20px; }

.topbar .topbar-title {
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--text);
    margin-right: auto;
}

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

/* ---------- 用户菜单(头像下拉) ---------- */
.user-menu {
    position: relative;
}
.user-menu .user-menu-trigger {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 10px 5px 5px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 20px;
    cursor: pointer;
    color: var(--text);
    font-family: inherit;
    font-size: var(--fs-sm);
    transition: all var(--t-fast) var(--ease);
}
.user-menu .user-menu-trigger:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}
.user-menu .avatar {
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 600; font-size: 13px;
    flex-shrink: 0;
}
.user-menu .user-name {
    font-weight: 500;
    max-width: 120px;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.user-menu .user-menu-trigger .chevron {
    width: 12px; height: 12px;
    transition: transform var(--t-fast) var(--ease);
}
.user-menu.open .user-menu-trigger .chevron { transform: rotate(180deg); }

.user-menu .user-menu-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 180px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 6px 0;
    z-index: 100;
    display: none;
}
.user-menu.open .user-menu-dropdown { display: block; }
.user-menu .user-menu-dropdown .menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    color: var(--text);
    text-decoration: none;
    font-size: var(--fs-sm);
    cursor: pointer;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    font-family: inherit;
    transition: background var(--t-fast) var(--ease);
}
.user-menu .user-menu-dropdown .menu-item:hover { background: var(--surface-2); }
.user-menu .user-menu-dropdown .menu-item.danger { color: var(--danger); }
.user-menu .user-menu-dropdown .menu-item .icon { width: 16px; height: 16px; opacity: 0.7; }
.user-menu .user-menu-dropdown .menu-divider {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
}
.user-menu .user-menu-dropdown .menu-info {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 4px;
}
.user-menu .user-menu-dropdown .menu-info .info-name {
    font-weight: 600;
    color: var(--text);
    font-size: var(--fs-sm);
}
.user-menu .user-menu-dropdown .menu-info .info-role {
    font-size: var(--fs-xs);
    color: var(--text-muted);
    margin-top: 2px;
}

/* ---------- 主内容区 ---------- */
.main {
    grid-area: main;
    padding: 20px 24px;
    overflow-x: hidden;
    min-width: 0;
}
.main .container-inner {
    max-width: 1200px;
    margin: 0 auto;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--fs-sm);
    color: var(--text-muted);
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--t-base) var(--ease);
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--text-muted); user-select: none; }
.breadcrumb .current { color: var(--text); font-weight: 500; }

/* ---------- 移动端抽屉 ---------- */
.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 55;
    opacity: 0;
    transition: opacity 220ms var(--ease);
}
.sidebar-backdrop.show {
    display: block;
    opacity: 1;
}

@media (max-width: 1024px) {
    .layout {
        grid-template-columns: 1fr;
        grid-template-areas:
            "topbar"
            "main";
    }
    .sidebar {
        position: fixed;
        top: 0; left: 0;
        height: 100vh;
        transform: translateX(-100%);
        z-index: 70;
        box-shadow: 0 0 40px rgba(0,0,0,0.2);
    }
    .layout.sidebar-open .sidebar {
        transform: translateX(0);
    }
    .topbar .menu-toggle { display: inline-flex; }
    .topbar .topbar-title { font-size: var(--fs-base); }
    .user-menu .user-name { display: none; }
    .user-menu .user-menu-trigger { padding: 4px; }
    .user-menu .user-menu-trigger .chevron { display: none; }
}
@media (max-width: 767px) {
    .topbar { padding: 0 14px; gap: 10px; }
    .main { padding: 14px 12px; }
    .breadcrumb { font-size: var(--fs-xs); }
    .sidebar { width: 260px; }
}
@media (max-width: 480px) {
    .topbar .topbar-title { display: none; }
}

/* 阻止 body 滚动(抽屉打开时) */
body.sidebar-locked { overflow: hidden; }