@charset "utf-8";
/* ============================================================
 * pg-ui.css — phpGrace 后台原生 UI 基础层（原生 CSS 实现）
 *
 * 说明：
 *   1. 纯原生 CSS 实现，无任何第三方框架依赖。
 *   2. 提供后台模板仍在使用的那批通用类所需的样式：
 *      reset/排版、栅格、间距、按钮、表单、表格、徽标、提示框、
 *      导航标签、面包屑、下拉菜单、模态框、分页、进度条、加载动画、工具类。
 *   3. 数值对齐主流 UI 框架的默认外观，站点主题由 admin.css（后加载）覆盖，
 *      因此本文件必须在站点主题 CSS 之前引入。
 *   4. 所有可配置项集中在 :root 的 --pg-ui-* 变量中。
 * ============================================================ */

/* ===================== 设计变量 ===================== */
:root {
    /* 字体 */
    --pg-ui-font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans',
                       'PingFang SC', 'Microsoft YaHei', Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
    --pg-ui-font-mono: SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;

    /* 文本与背景 */
    --pg-ui-body-color: #212529;
    --pg-ui-body-color-rgb: 33, 37, 41;
    --pg-ui-body-bg: #fff;
    --pg-ui-emphasis-color: #000;
    --pg-ui-secondary-color: rgba(33, 37, 41, 0.75);
    --pg-ui-tertiary-color: rgba(33, 37, 41, 0.5);
    --pg-ui-secondary-bg: #e9ecef;
    --pg-ui-tertiary-bg: #f8f9fa;

    /* 主题色（站点主题色在 admin.css 中覆盖） */
    --pg-ui-primary: #0d6efd;       --pg-ui-primary-rgb: 13, 110, 253;
    --pg-ui-secondary: #6c757d;     --pg-ui-secondary-rgb: 108, 117, 125;
    --pg-ui-success: #198754;       --pg-ui-success-rgb: 25, 135, 84;
    --pg-ui-info: #0dcaf0;          --pg-ui-info-rgb: 13, 202, 240;
    --pg-ui-warning: #ffc107;       --pg-ui-warning-rgb: 255, 193, 7;
    --pg-ui-danger: #dc3545;        --pg-ui-danger-rgb: 220, 53, 69;
    --pg-ui-light: #f8f9fa;         --pg-ui-light-rgb: 248, 249, 250;
    --pg-ui-dark: #212529;          --pg-ui-dark-rgb: 33, 37, 41;

    /* 链接 */
    --pg-ui-link-color: #0d6efd;
    --pg-ui-link-hover-color: #0a58ca;

    /* 边框与圆角 */
    --pg-ui-border-width: 1px;
    --pg-ui-border-style: solid;
    --pg-ui-border-color: #dee2e6;
    --pg-ui-border-color-translucent: rgba(0, 0, 0, 0.175);
    --pg-ui-border-radius: 0.375rem;
    --pg-ui-border-radius-sm: 0.25rem;
    --pg-ui-border-radius-lg: 0.5rem;
    --pg-ui-border-radius-pill: 50rem;

    /* 阴影 */
    --pg-ui-box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --pg-ui-box-shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    /* 焦点态跟着主题色走：写死 Bootstrap 蓝会在青绿站点上漏出一圈不相干的蓝（帖子 758 顺带修）。
       前台在 statics/css/home.css 桥接 --pg-ui-primary-rgb，后台在 admin.css 桥接。 */
    --pg-ui-focus-ring: 0 0 0 0.25rem rgba(var(--pg-ui-primary-rgb), 0.25);
    --pg-ui-focus-border: var(--pg-ui-primary);

    /* 栅格与间距 */
    --pg-ui-gutter-x: 1.5rem;
    --pg-ui-gutter-y: 0;
    --pg-ui-spacer: 1rem;

    /* 层级 */
    --pg-ui-z-dropdown: 1000;
    --pg-ui-z-modal: 1055;
    --pg-ui-z-modal-backdrop: 1050;
    --pg-ui-z-toast: 1090;

    /* 动效 */
    --pg-ui-transition: 0.15s ease-in-out;
}

/* ===================== 基础重置 ===================== */
*, *::before, *::after { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--pg-ui-font-sans);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--pg-ui-body-color);
    text-align: left;
    background-color: var(--pg-ui-body-bg);
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

hr { margin: 1rem 0; color: inherit; border: 0; border-top: 1px solid; opacity: .25; }

h1, h2, h3, h4, h5, h6 { margin-top: 0; margin-bottom: .5rem; font-weight: 500; line-height: 1.2; }
h1 { font-size: calc(1.375rem + 1.5vw); }
h2 { font-size: calc(1.325rem + .9vw); }
h3 { font-size: calc(1.3rem + .6vw); }
h4 { font-size: calc(1.275rem + .3vw); }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }
@media (min-width: 1200px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
    h4 { font-size: 1.5rem; }
}

p { margin-top: 0; margin-bottom: 1rem; }
ol, ul { padding-left: 2rem; }
dl, ol, ul { margin-top: 0; margin-bottom: 1rem; }
ol ol, ol ul, ul ol, ul ul { margin-bottom: 0; }
dt { font-weight: 700; }
dd { margin-bottom: .5rem; margin-left: 0; }
blockquote { margin: 0 0 1rem; }
b, strong { font-weight: bolder; }
small, .small { font-size: .875em; }
sup, sub { position: relative; font-size: .75em; line-height: 0; vertical-align: baseline; }
sub { bottom: -.25em; }
sup { top: -.5em; }

a { color: var(--pg-ui-link-color); text-decoration: underline; }
a:hover { color: var(--pg-ui-link-hover-color); }
a:not([href]):not([class]),
a:not([href]):not([class]):hover { color: inherit; text-decoration: none; }

code, kbd, pre, samp { font-family: var(--pg-ui-font-mono); font-size: 1em; }
pre { display: block; margin-top: 0; margin-bottom: 1rem; overflow: auto; font-size: .875em; }
code { font-size: .875em; color: #d63384; word-wrap: break-word; }
kbd { padding: .1875rem .375rem; color: var(--pg-ui-body-bg); background-color: var(--pg-ui-body-color); border-radius: var(--pg-ui-border-radius-sm); }
figure { margin: 0 0 1rem; }
img, svg { vertical-align: middle; }

table { caption-side: bottom; border-collapse: collapse; }
caption { padding-top: .5rem; padding-bottom: .5rem; color: var(--pg-ui-secondary-color); text-align: left; }
th { text-align: inherit; text-align: -webkit-match-parent; }
thead, tbody, tfoot, tr, td, th { border-color: inherit; border-style: solid; border-width: 0; }

label { display: inline-block; }

button { border-radius: 0; }
button:focus:not(:focus-visible) { outline: 0; }
button, input, optgroup, select, textarea { margin: 0; font-family: inherit; font-size: inherit; line-height: inherit; }
button, select { text-transform: none; }
[role='button'] { cursor: pointer; }
select:disabled { opacity: 1; }
[type='button'], [type='reset'], [type='submit'], button { -webkit-appearance: button; }
[type='button']:not(:disabled), [type='reset']:not(:disabled), [type='submit']:not(:disabled), button:not(:disabled) { cursor: pointer; }
textarea { resize: vertical; }
fieldset { min-width: 0; padding: 0; margin: 0; border: 0; }
legend { float: left; width: 100%; padding: 0; margin-bottom: .5rem; font-size: calc(1.275rem + .3vw); line-height: inherit; }
legend + * { clear: left; }
[type='search'] { -webkit-appearance: textfield; outline-offset: -2px; }
[hidden] { display: none !important; }

/* ===================== 栅格 ===================== */
.row {
    --pg-ui-gutter-x: 1.5rem;
    --pg-ui-gutter-y: 0;
    display: flex;
    flex-wrap: wrap;
    margin-top: calc(-1 * var(--pg-ui-gutter-y));
    margin-right: calc(-.5 * var(--pg-ui-gutter-x));
    margin-left: calc(-.5 * var(--pg-ui-gutter-x));
}
.row > * {
    box-sizing: border-box;
    flex-shrink: 0;
    width: 100%;
    max-width: 100%;
    padding-right: calc(var(--pg-ui-gutter-x) * .5);
    padding-left: calc(var(--pg-ui-gutter-x) * .5);
    margin-top: var(--pg-ui-gutter-y);
}
.g-0 { --pg-ui-gutter-x: 0; --pg-ui-gutter-y: 0; }
.g-2 { --pg-ui-gutter-x: .5rem; --pg-ui-gutter-y: .5rem; }
.g-3 { --pg-ui-gutter-x: 1rem; --pg-ui-gutter-y: 1rem; }
.g-4 { --pg-ui-gutter-x: 1.5rem; --pg-ui-gutter-y: 1.5rem; }
.gx-2 { --pg-ui-gutter-x: .5rem; }
.gy-2 { --pg-ui-gutter-y: .5rem; }

.col { flex: 1 0 0%; }
.col-auto { flex: 0 0 auto; width: auto; }
.col-1  { flex: 0 0 auto; width: 8.33333333%; }
.col-2  { flex: 0 0 auto; width: 16.66666667%; }
.col-3  { flex: 0 0 auto; width: 25%; }
.col-4  { flex: 0 0 auto; width: 33.33333333%; }
.col-5  { flex: 0 0 auto; width: 41.66666667%; }
.col-6  { flex: 0 0 auto; width: 50%; }
.col-7  { flex: 0 0 auto; width: 58.33333333%; }
.col-8  { flex: 0 0 auto; width: 66.66666667%; }
.col-9  { flex: 0 0 auto; width: 75%; }
.col-10 { flex: 0 0 auto; width: 83.33333333%; }
.col-11 { flex: 0 0 auto; width: 91.66666667%; }
.col-12 { flex: 0 0 auto; width: 100%; }

@media (min-width: 576px) {
    .col-sm-1  { flex: 0 0 auto; width: 8.33333333%; }
    .col-sm-2  { flex: 0 0 auto; width: 16.66666667%; }
    .col-sm-3  { flex: 0 0 auto; width: 25%; }
    .col-sm-4  { flex: 0 0 auto; width: 33.33333333%; }
    .col-sm-5  { flex: 0 0 auto; width: 41.66666667%; }
    .col-sm-6  { flex: 0 0 auto; width: 50%; }
    .col-sm-7  { flex: 0 0 auto; width: 58.33333333%; }
    .col-sm-8  { flex: 0 0 auto; width: 66.66666667%; }
    .col-sm-9  { flex: 0 0 auto; width: 75%; }
    .col-sm-10 { flex: 0 0 auto; width: 83.33333333%; }
    .col-sm-11 { flex: 0 0 auto; width: 91.66666667%; }
    .col-sm-12 { flex: 0 0 auto; width: 100%; }
}
@media (min-width: 768px) {
    .col-md-1  { flex: 0 0 auto; width: 8.33333333%; }
    .col-md-2  { flex: 0 0 auto; width: 16.66666667%; }
    .col-md-3  { flex: 0 0 auto; width: 25%; }
    .col-md-4  { flex: 0 0 auto; width: 33.33333333%; }
    .col-md-5  { flex: 0 0 auto; width: 41.66666667%; }
    .col-md-6  { flex: 0 0 auto; width: 50%; }
    .col-md-7  { flex: 0 0 auto; width: 58.33333333%; }
    .col-md-8  { flex: 0 0 auto; width: 66.66666667%; }
    .col-md-9  { flex: 0 0 auto; width: 75%; }
    .col-md-10 { flex: 0 0 auto; width: 83.33333333%; }
    .col-md-11 { flex: 0 0 auto; width: 91.66666667%; }
    .col-md-12 { flex: 0 0 auto; width: 100%; }
}
@media (min-width: 992px) {
    .col-lg-1  { flex: 0 0 auto; width: 8.33333333%; }
    .col-lg-2  { flex: 0 0 auto; width: 16.66666667%; }
    .col-lg-3  { flex: 0 0 auto; width: 25%; }
    .col-lg-4  { flex: 0 0 auto; width: 33.33333333%; }
    .col-lg-5  { flex: 0 0 auto; width: 41.66666667%; }
    .col-lg-6  { flex: 0 0 auto; width: 50%; }
    .col-lg-7  { flex: 0 0 auto; width: 58.33333333%; }
    .col-lg-8  { flex: 0 0 auto; width: 66.66666667%; }
    .col-lg-9  { flex: 0 0 auto; width: 75%; }
    .col-lg-10 { flex: 0 0 auto; width: 83.33333333%; }
    .col-lg-11 { flex: 0 0 auto; width: 91.66666667%; }
    .col-lg-12 { flex: 0 0 auto; width: 100%; }
}
@media (min-width: 1200px) {
    .col-xl-1  { flex: 0 0 auto; width: 8.33333333%; }
    .col-xl-2  { flex: 0 0 auto; width: 16.66666667%; }
    .col-xl-3  { flex: 0 0 auto; width: 25%; }
    .col-xl-4  { flex: 0 0 auto; width: 33.33333333%; }
    .col-xl-5  { flex: 0 0 auto; width: 41.66666667%; }
    .col-xl-6  { flex: 0 0 auto; width: 50%; }
    .col-xl-7  { flex: 0 0 auto; width: 58.33333333%; }
    .col-xl-8  { flex: 0 0 auto; width: 66.66666667%; }
    .col-xl-9  { flex: 0 0 auto; width: 75%; }
    .col-xl-10 { flex: 0 0 auto; width: 83.33333333%; }
    .col-xl-11 { flex: 0 0 auto; width: 91.66666667%; }
    .col-xl-12 { flex: 0 0 auto; width: 100%; }
}
@media (min-width: 1400px) {
    .col-xxl-1  { flex: 0 0 auto; width: 8.33333333%; }
    .col-xxl-2  { flex: 0 0 auto; width: 16.66666667%; }
    .col-xxl-3  { flex: 0 0 auto; width: 25%; }
    .col-xxl-4  { flex: 0 0 auto; width: 33.33333333%; }
    .col-xxl-5  { flex: 0 0 auto; width: 41.66666667%; }
    .col-xxl-6  { flex: 0 0 auto; width: 50%; }
    .col-xxl-7  { flex: 0 0 auto; width: 58.33333333%; }
    .col-xxl-8  { flex: 0 0 auto; width: 66.66666667%; }
    .col-xxl-9  { flex: 0 0 auto; width: 75%; }
    .col-xxl-10 { flex: 0 0 auto; width: 83.33333333%; }
    .col-xxl-11 { flex: 0 0 auto; width: 91.66666667%; }
    .col-xxl-12 { flex: 0 0 auto; width: 100%; }
}

/* ===================== 布局工具类 ===================== */
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }
.d-block { display: block !important; }
.d-grid { display: grid !important; }
.d-inline-flex { display: inline-flex !important; }
.d-flex { display: flex !important; }
.d-none { display: none !important; }
.d-table { display: table !important; }
.d-table-cell { display: table-cell !important; }

@media (min-width: 576px) {
    .d-sm-inline { display: inline !important; }
    .d-sm-block { display: block !important; }
    .d-sm-flex { display: flex !important; }
    .d-sm-none { display: none !important; }
}
@media (min-width: 768px) {
    .d-md-block { display: block !important; }
    .d-md-flex { display: flex !important; }
    .d-md-none { display: none !important; }
}
@media (min-width: 992px) {
    .d-lg-block { display: block !important; }
    .d-lg-flex { display: flex !important; }
    .d-lg-none { display: none !important; }
}

.flex-row { flex-direction: row !important; }
.flex-column { flex-direction: column !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-nowrap { flex-wrap: nowrap !important; }
.flex-fill { flex: 1 1 auto !important; }
.flex-grow-0 { flex-grow: 0 !important; }
.flex-grow-1 { flex-grow: 1 !important; }
.flex-shrink-0 { flex-shrink: 0 !important; }

.justify-content-start { justify-content: flex-start !important; }
.justify-content-end { justify-content: flex-end !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-between { justify-content: space-between !important; }
.justify-content-around { justify-content: space-around !important; }

.align-items-start { align-items: flex-start !important; }
.align-items-end { align-items: flex-end !important; }
.align-items-center { align-items: center !important; }
.align-items-baseline { align-items: baseline !important; }
.align-items-stretch { align-items: stretch !important; }

.gap-0 { gap: 0 !important; }
.gap-1 { gap: .25rem !important; }
.gap-2 { gap: .5rem !important; }
.gap-3 { gap: 1rem !important; }
.gap-4 { gap: 1.5rem !important; }
.gap-5 { gap: 3rem !important; }

.float-start { float: left !important; }
.float-end { float: right !important; }
.position-static { position: static !important; }
.position-relative { position: relative !important; }
.position-absolute { position: absolute !important; }
.position-fixed { position: fixed !important; }
.overflow-auto { overflow: auto !important; }
.overflow-hidden { overflow: hidden !important; }
.w-100 { width: 100% !important; }
.w-25 { width: 25% !important; }
.w-50 { width: 50% !important; }
.h-100 { height: 100% !important; }
.mw-100 { max-width: 100% !important; }
.visible { visibility: visible !important; }
.invisible { visibility: hidden !important; }

/* ===================== 间距工具类 ===================== */
/* .m-auto 必须排在 .me-* / .ms-* 之前，保证 me-2 之类的单边间距能覆盖它（与主流框架一致） */
.m-auto { margin: auto !important; }
.m-0 { margin: 0 !important; }        .m-1 { margin: .25rem !important; }
.m-2 { margin: .5rem !important; }    .m-3 { margin: 1rem !important; }
.m-4 { margin: 1.5rem !important; }   .m-5 { margin: 3rem !important; }

.mt-0 { margin-top: 0 !important; }   .mt-1 { margin-top: .25rem !important; }
.mt-2 { margin-top: .5rem !important; } .mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; } .mt-5 { margin-top: 3rem !important; }
.mt-auto { margin-top: auto !important; }

.mb-0 { margin-bottom: 0 !important; } .mb-1 { margin-bottom: .25rem !important; }
.mb-2 { margin-bottom: .5rem !important; } .mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; } .mb-5 { margin-bottom: 3rem !important; }
.mb-auto { margin-bottom: auto !important; }

.ms-0 { margin-left: 0 !important; }  .ms-1 { margin-left: .25rem !important; }
.ms-2 { margin-left: .5rem !important; } .ms-3 { margin-left: 1rem !important; }
.ms-auto { margin-left: auto !important; }

.me-0 { margin-right: 0 !important; } .me-1 { margin-right: .25rem !important; }
.me-2 { margin-right: .5rem !important; } .me-3 { margin-right: 1rem !important; }
.me-auto { margin-right: auto !important; }

.mx-0 { margin-right: 0 !important; margin-left: 0 !important; }
.mx-1 { margin-right: .25rem !important; margin-left: .25rem !important; }
.mx-2 { margin-right: .5rem !important; margin-left: .5rem !important; }
.mx-3 { margin-right: 1rem !important; margin-left: 1rem !important; }
.mx-auto { margin-right: auto !important; margin-left: auto !important; }
.my-0 { margin-top: 0 !important; margin-bottom: 0 !important; }
.my-1 { margin-top: .25rem !important; margin-bottom: .25rem !important; }
.my-2 { margin-top: .5rem !important; margin-bottom: .5rem !important; }
.my-3 { margin-top: 1rem !important; margin-bottom: 1rem !important; }
.my-4 { margin-top: 1.5rem !important; margin-bottom: 1.5rem !important; }

.p-0 { padding: 0 !important; }       .p-1 { padding: .25rem !important; }
.p-2 { padding: .5rem !important; }   .p-3 { padding: 1rem !important; }
.p-4 { padding: 1.5rem !important; }  .p-5 { padding: 3rem !important; }
.pt-0 { padding-top: 0 !important; }  .pt-1 { padding-top: .25rem !important; }
.pt-2 { padding-top: .5rem !important; } .pt-3 { padding-top: 1rem !important; }
.pb-0 { padding-bottom: 0 !important; } .pb-2 { padding-bottom: .5rem !important; }
.pb-3 { padding-bottom: 1rem !important; }
.ps-0 { padding-left: 0 !important; } .ps-2 { padding-left: .5rem !important; }
.pe-0 { padding-right: 0 !important; } .pe-2 { padding-right: .5rem !important; }
.px-0 { padding-right: 0 !important; padding-left: 0 !important; }
.px-2 { padding-right: .5rem !important; padding-left: .5rem !important; }
.px-3 { padding-right: 1rem !important; padding-left: 1rem !important; }
.py-0 { padding-top: 0 !important; padding-bottom: 0 !important; }
.py-1 { padding-top: .25rem !important; padding-bottom: .25rem !important; }
.py-2 { padding-top: .5rem !important; padding-bottom: .5rem !important; }
.py-3 { padding-top: 1rem !important; padding-bottom: 1rem !important; }
.py-4 { padding-top: 1.5rem !important; padding-bottom: 1.5rem !important; }

/* ===================== Toast 轻提示 =====================
 * 说明：本段必须排在「文本与颜色工具类」之前，
 *       这样 .toast 上的 .bg-success / .bg-danger 等背景工具类才能覆盖默认底色。
 */
.toast {
    --pg-ui-toast-padding-x: .75rem;
    --pg-ui-toast-padding-y: .5rem;
    --pg-ui-toast-spacing: 1.5rem;
    --pg-ui-toast-max-width: 350px;
    --pg-ui-toast-font-size: .875rem;
    --pg-ui-toast-bg: var(--pg-ui-body-bg);
    --pg-ui-toast-border-radius: var(--pg-ui-border-radius);
    width: var(--pg-ui-toast-max-width);
    max-width: 100%;
    font-size: var(--pg-ui-toast-font-size);
    color: var(--pg-ui-body-color);
    pointer-events: auto;
    background-color: var(--pg-ui-toast-bg);
    background-clip: padding-box;
    border: var(--pg-ui-border-width) solid var(--pg-ui-border-color-translucent);
    border-radius: var(--pg-ui-toast-border-radius);
    box-shadow: var(--pg-ui-box-shadow);
}
.toast.showing { opacity: 0; }
.toast:not(.show) { display: none; }
.toast-container {
    position: absolute;
    z-index: var(--pg-ui-z-toast);
    width: max-content;
    max-width: 100%;
    pointer-events: none;
}
.toast-container > :not(:last-child) { margin-bottom: var(--pg-ui-toast-spacing); }
.toast-header {
    display: flex;
    align-items: center;
    padding: var(--pg-ui-toast-padding-y) var(--pg-ui-toast-padding-x);
    color: var(--pg-ui-secondary-color);
    background-color: var(--pg-ui-toast-bg);
    background-clip: padding-box;
    border-bottom: var(--pg-ui-border-width) solid var(--pg-ui-border-color-translucent);
    border-top-left-radius: calc(var(--pg-ui-toast-border-radius) - var(--pg-ui-border-width));
    border-top-right-radius: calc(var(--pg-ui-toast-border-radius) - var(--pg-ui-border-width));
}
.toast-header .btn-close {
    margin-right: calc(-.5 * var(--pg-ui-toast-padding-x));
    margin-left: var(--pg-ui-toast-padding-x);
}
.toast-body {
    padding: var(--pg-ui-toast-padding-x);
    word-wrap: break-word;
}
/* 彩色 Toast（配合 .bg-* / .text-white 使用）：
 * .bg-* 带 !important，天然会覆盖上面的默认底色，这里只收掉描边、减轻阴影。
 */
.toast.bg-primary,
.toast.bg-success,
.toast.bg-danger,
.toast.bg-warning,
.toast.bg-info,
.toast.bg-secondary,
.toast.bg-dark {
    border-color: transparent;
    box-shadow: var(--pg-ui-box-shadow-sm);
}

/* ===================== 文本与颜色工具类 ===================== */
.text-start { text-align: left !important; }
.text-end { text-align: right !important; }
.text-center { text-align: center !important; }
.text-justify { text-align: justify !important; }
.text-nowrap { white-space: nowrap !important; }
.text-wrap { white-space: normal !important; }

.fs-1 { font-size: 2.5rem !important; }
.fs-2 { font-size: 2rem !important; }
.fs-3 { font-size: 1.75rem !important; }
.fs-4 { font-size: 1.5rem !important; }
.fs-5 { font-size: 1.25rem !important; }
.fs-6 { font-size: 1rem !important; }

.fw-light { font-weight: 300 !important; }
.fw-normal { font-weight: 400 !important; }
.fw-semibold { font-weight: 600 !important; }
.fw-bold { font-weight: 700 !important; }
.fst-italic { font-style: italic !important; }
.lh-1 { line-height: 1 !important; }
.lh-sm { line-height: 1.25 !important; }
.lh-base { line-height: 1.5 !important; }
.lh-lg { line-height: 2 !important; }

.text-primary { color: var(--pg-ui-primary) !important; }
.text-secondary { color: var(--pg-ui-secondary) !important; }
.text-success { color: var(--pg-ui-success) !important; }
.text-info { color: var(--pg-ui-info) !important; }
.text-warning { color: var(--pg-ui-warning) !important; }
.text-danger { color: var(--pg-ui-danger) !important; }
.text-light { color: var(--pg-ui-light) !important; }
.text-dark { color: var(--pg-ui-dark) !important; }
.text-white { color: #fff !important; }
.text-body { color: var(--pg-ui-body-color) !important; }
.text-muted { color: var(--pg-ui-secondary-color) !important; }
.text-black-50 { color: rgba(0, 0, 0, .5) !important; }
.text-white-50 { color: rgba(255, 255, 255, .5) !important; }

.bg-primary { background-color: var(--pg-ui-primary) !important; }
.bg-secondary { background-color: var(--pg-ui-secondary) !important; }
.bg-success { background-color: var(--pg-ui-success) !important; }
.bg-info { background-color: var(--pg-ui-info) !important; }
.bg-warning { background-color: var(--pg-ui-warning) !important; }
.bg-danger { background-color: var(--pg-ui-danger) !important; }
.bg-light { background-color: var(--pg-ui-light) !important; }
.bg-dark { background-color: var(--pg-ui-dark) !important; }
.bg-white { background-color: #fff !important; }
.bg-transparent { background-color: transparent !important; }

.border { border: var(--pg-ui-border-width) var(--pg-ui-border-style) var(--pg-ui-border-color) !important; }
.border-0 { border: 0 !important; }
.border-top { border-top: var(--pg-ui-border-width) var(--pg-ui-border-style) var(--pg-ui-border-color) !important; }
.border-end { border-right: var(--pg-ui-border-width) var(--pg-ui-border-style) var(--pg-ui-border-color) !important; }
.border-bottom { border-bottom: var(--pg-ui-border-width) var(--pg-ui-border-style) var(--pg-ui-border-color) !important; }
.border-start { border-left: var(--pg-ui-border-width) var(--pg-ui-border-style) var(--pg-ui-border-color) !important; }
.border-top-0 { border-top: 0 !important; }
.border-bottom-0 { border-bottom: 0 !important; }

.rounded { border-radius: var(--pg-ui-border-radius) !important; }
.rounded-0 { border-radius: 0 !important; }
.rounded-1 { border-radius: var(--pg-ui-border-radius-sm) !important; }
.rounded-2 { border-radius: var(--pg-ui-border-radius) !important; }
.rounded-3 { border-radius: var(--pg-ui-border-radius-lg) !important; }
.rounded-circle { border-radius: 50% !important; }
.rounded-pill { border-radius: var(--pg-ui-border-radius-pill) !important; }
.rounded-top { border-top-left-radius: var(--pg-ui-border-radius) !important; border-top-right-radius: var(--pg-ui-border-radius) !important; }
.rounded-bottom { border-bottom-right-radius: var(--pg-ui-border-radius) !important; border-bottom-left-radius: var(--pg-ui-border-radius) !important; }

.shadow-none { box-shadow: none !important; }
.shadow-sm { box-shadow: var(--pg-ui-box-shadow-sm) !important; }
.shadow { box-shadow: var(--pg-ui-box-shadow) !important; }
.shadow-lg { box-shadow: 0 1rem 3rem rgba(0, 0, 0, .175) !important; }

/* ===================== 按钮 ===================== */
.btn {
    display: inline-block;
    padding: .375rem .75rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--pg-ui-body-color);
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: transparent;
    border: var(--pg-ui-border-width) solid transparent;
    border-radius: var(--pg-ui-border-radius);
    transition: color var(--pg-ui-transition), background-color var(--pg-ui-transition),
                border-color var(--pg-ui-transition), box-shadow var(--pg-ui-transition);
}
.btn:hover { color: var(--pg-ui-body-color); text-decoration: none; }
.btn:focus { outline: 0; box-shadow: var(--pg-ui-focus-ring); }
.btn:disabled, .btn.disabled { pointer-events: none; opacity: .65; }
.btn-sm { padding: .25rem .5rem; font-size: .875rem; border-radius: var(--pg-ui-border-radius-sm); }
.btn-lg { padding: .5rem 1rem; font-size: 1.25rem; border-radius: var(--pg-ui-border-radius-lg); }

.btn-primary { color: #fff; background-color: var(--pg-ui-primary); border-color: var(--pg-ui-primary); }
.btn-primary:hover { color: #fff; background-color: #0b5ed7; border-color: #0a58ca; }
.btn-secondary { color: #fff; background-color: var(--pg-ui-secondary); border-color: var(--pg-ui-secondary); }
.btn-secondary:hover { color: #fff; background-color: #565e64; border-color: #51585e; }
.btn-success { color: #fff; background-color: var(--pg-ui-success); border-color: var(--pg-ui-success); }
.btn-success:hover { color: #fff; background-color: #157347; border-color: #146c43; }
.btn-info { color: #000; background-color: var(--pg-ui-info); border-color: var(--pg-ui-info); }
.btn-info:hover { color: #000; background-color: #31d2f2; border-color: #25cff2; }
.btn-warning { color: #000; background-color: var(--pg-ui-warning); border-color: var(--pg-ui-warning); }
.btn-warning:hover { color: #000; background-color: #ffcd39; border-color: #ffc720; }
.btn-danger { color: #fff; background-color: var(--pg-ui-danger); border-color: var(--pg-ui-danger); }
.btn-danger:hover { color: #fff; background-color: #bb2d3b; border-color: #b02a37; }
.btn-light { color: #000; background-color: var(--pg-ui-light); border-color: var(--pg-ui-light); }
.btn-light:hover { color: #000; background-color: #f9fafb; border-color: #f8f9fa; }
.btn-dark { color: #fff; background-color: var(--pg-ui-dark); border-color: var(--pg-ui-dark); }
.btn-dark:hover { color: #fff; background-color: #1c1f23; border-color: #1a1e21; }

.btn-outline-primary { color: var(--pg-ui-primary); border-color: var(--pg-ui-primary); background-color: transparent; }
.btn-outline-primary:hover { color: #fff; background-color: var(--pg-ui-primary); border-color: var(--pg-ui-primary); }
.btn-outline-secondary { color: var(--pg-ui-secondary); border-color: var(--pg-ui-secondary); background-color: transparent; }
.btn-outline-secondary:hover { color: #fff; background-color: var(--pg-ui-secondary); border-color: var(--pg-ui-secondary); }
.btn-outline-success { color: var(--pg-ui-success); border-color: var(--pg-ui-success); background-color: transparent; }
.btn-outline-success:hover { color: #fff; background-color: var(--pg-ui-success); border-color: var(--pg-ui-success); }
.btn-outline-info { color: var(--pg-ui-info); border-color: var(--pg-ui-info); background-color: transparent; }
.btn-outline-info:hover { color: #000; background-color: var(--pg-ui-info); border-color: var(--pg-ui-info); }
.btn-outline-warning { color: var(--pg-ui-warning); border-color: var(--pg-ui-warning); background-color: transparent; }
.btn-outline-warning:hover { color: #000; background-color: var(--pg-ui-warning); border-color: var(--pg-ui-warning); }
.btn-outline-danger { color: var(--pg-ui-danger); border-color: var(--pg-ui-danger); background-color: transparent; }
.btn-outline-danger:hover { color: #fff; background-color: var(--pg-ui-danger); border-color: var(--pg-ui-danger); }
.btn-outline-light { color: var(--pg-ui-light); border-color: var(--pg-ui-light); background-color: transparent; }
.btn-outline-light:hover { color: #000; background-color: var(--pg-ui-light); border-color: var(--pg-ui-light); }

.btn-close {
    box-sizing: content-box;
    width: 1em;
    height: 1em;
    padding: .25em .25em;
    color: var(--pg-ui-emphasis-color);
    background: transparent url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3cpath d='M.293.293a1 1 0 0 1 1.414 0L8 6.586 14.293.293a1 1 0 1 1 1.414 1.414L9.414 8l6.293 6.293a1 1 0 0 1-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 0 1-1.414-1.414L6.586 8 .293 1.707a1 1 0 0 1 0-1.414z'/%3e%3c/svg%3e") center/1em auto no-repeat;
    border: 0;
    border-radius: var(--pg-ui-border-radius);
    opacity: .5;
    cursor: pointer;
}
.btn-close:hover { opacity: .75; text-decoration: none; }
.btn-close:focus { outline: 0; box-shadow: var(--pg-ui-focus-ring); opacity: 1; }
/* 深色/彩色背景上的关闭按钮（同名类），把黑色图标反相为白色 */
.btn-close-white { filter: invert(1) grayscale(100%) brightness(200%); }

/* ===================== 表单 ===================== */
.form-label { margin-bottom: .5rem; }
.form-text { margin-top: .25rem; font-size: .875em; color: var(--pg-ui-secondary-color); }

.form-control {
    display: block;
    width: 100%;
    padding: .375rem .75rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--pg-ui-body-color);
    background-color: var(--pg-ui-body-bg);
    background-clip: padding-box;
    border: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border-radius: var(--pg-ui-border-radius);
    transition: border-color var(--pg-ui-transition), box-shadow var(--pg-ui-transition);
}
.form-control:focus {
    color: var(--pg-ui-body-color);
    background-color: var(--pg-ui-body-bg);
    border-color: var(--pg-ui-focus-border);
    outline: 0;
    box-shadow: var(--pg-ui-focus-ring);
}
.form-control::placeholder { color: var(--pg-ui-tertiary-color); opacity: 1; }
.form-control:disabled { background-color: var(--pg-ui-secondary-bg); opacity: 1; }
.form-control-sm { padding: .25rem .5rem; font-size: .875rem; border-radius: var(--pg-ui-border-radius-sm); }
.form-control-lg { padding: .5rem 1rem; font-size: 1.25rem; border-radius: var(--pg-ui-border-radius-lg); }

.form-select {
    display: block;
    width: 100%;
    padding: .375rem 2.25rem .375rem .75rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--pg-ui-body-color);
    background-color: var(--pg-ui-body-bg);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right .75rem center;
    background-size: 16px 12px;
    border: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
    border-radius: var(--pg-ui-border-radius);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    transition: border-color var(--pg-ui-transition), box-shadow var(--pg-ui-transition);
}
.form-select:focus { border-color: var(--pg-ui-focus-border); outline: 0; box-shadow: var(--pg-ui-focus-ring); }
.form-select-sm { padding-top: .25rem; padding-bottom: .25rem; padding-left: .5rem; font-size: .875rem; border-radius: var(--pg-ui-border-radius-sm); }

.form-check { display: block; min-height: 1.5rem; padding-left: 1.5em; margin-bottom: .125rem; }
/* 注意：负边距只在 .form-check 容器内生效（对齐原生交互行为），
   独立使用的 <input class="form-check-input"> 保持原位，避免表格内复选框被左移 */
.form-check > .form-check-input { float: left; margin-left: -1.5em; }
.form-check-input {
    flex-shrink: 0;
    width: 1em;
    height: 1em;
    margin-top: .25em;
    vertical-align: top;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--pg-ui-body-bg);
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    border: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
    border-radius: .25em;
    -webkit-print-color-adjust: exact;
    color-adjust: exact;
    print-color-adjust: exact;
    transition: background-color var(--pg-ui-transition), border-color var(--pg-ui-transition),
                background-position var(--pg-ui-transition), box-shadow var(--pg-ui-transition);
}
.form-check-input[type='radio'] { border-radius: 50%; }
.form-check-input:checked {
    background-color: var(--pg-ui-primary);
    border-color: var(--pg-ui-primary);
}
.form-check-input[type='checkbox']:checked {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='m6 10 3 3 6-6'/%3e%3c/svg%3e");
}
.form-check-input[type='radio']:checked {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='2' fill='%23fff'/%3e%3c/svg%3e");
}
.form-check-input:focus { border-color: var(--pg-ui-focus-border); outline: 0; box-shadow: var(--pg-ui-focus-ring); }
.form-check-input:disabled { filter: none; opacity: .5; pointer-events: none; }
.form-check-label { cursor: pointer; }

.input-group { position: relative; display: flex; flex-wrap: wrap; align-items: stretch; width: 100%; }
.input-group > .form-control,
.input-group > .form-select { position: relative; flex: 1 1 auto; width: 1%; min-width: 0; }
.input-group > .form-control:not(:first-child),
.input-group > .form-select:not(:first-child) { border-top-left-radius: 0; border-bottom-left-radius: 0; margin-left: calc(var(--pg-ui-border-width) * -1); }
.input-group > .form-control:not(:last-child),
.input-group > .form-select:not(:last-child) { border-top-right-radius: 0; border-bottom-right-radius: 0; }
.input-group-text {
    display: flex;
    align-items: center;
    padding: .375rem .75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--pg-ui-body-color);
    text-align: center;
    white-space: nowrap;
    background-color: var(--pg-ui-tertiary-bg);
    border: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
    border-radius: var(--pg-ui-border-radius);
}
.input-group-sm > .form-control,
.input-group-sm > .form-select,
.input-group-sm > .input-group-text {
    padding: .25rem .5rem;
    font-size: .875rem;
    border-radius: var(--pg-ui-border-radius-sm);
}
.input-group-lg > .form-control,
.input-group-lg > .form-select,
.input-group-lg > .input-group-text { padding: .5rem 1rem; font-size: 1.25rem; border-radius: var(--pg-ui-border-radius-lg); }

/* ===================== 表格 ===================== */
.table {
    width: 100%;
    margin-bottom: 1rem;
    vertical-align: top;
    border-color: var(--pg-ui-border-color);
}
.table > :not(caption) > * > * {
    padding: .5rem .5rem;
    color: var(--pg-ui-emphasis-color);
    background-color: var(--pg-ui-body-bg);
    border-bottom-width: var(--pg-ui-border-width);
    box-shadow: inset 0 0 0 9999px transparent;
}
.table > tbody { vertical-align: inherit; }
.table > thead { vertical-align: bottom; }
.table-sm > :not(caption) > * > * { padding: .25rem .25rem; }
.table-bordered > :not(caption) > * { border-width: var(--pg-ui-border-width) 0; }
.table-bordered > :not(caption) > * > * { border-width: 0 var(--pg-ui-border-width); }
.table-borderless > :not(caption) > * > * { border-bottom-width: 0; }
.table-striped > tbody > tr:nth-of-type(odd) > * { box-shadow: inset 0 0 0 9999px rgba(0, 0, 0, .05); }
.table-hover > tbody > tr:hover > * { box-shadow: inset 0 0 0 9999px rgba(0, 0, 0, .075); }
.table-active { box-shadow: inset 0 0 0 9999px rgba(0, 0, 0, .1); }
.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.align-baseline { vertical-align: baseline !important; }
.align-top { vertical-align: top !important; }
.align-middle { vertical-align: middle !important; }
.align-bottom { vertical-align: bottom !important; }

/* ===================== 徽标 ===================== */
.badge {
    display: inline-block;
    padding: .35em .65em;
    font-size: .75em;
    font-weight: 700;
    line-height: 1;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: var(--pg-ui-border-radius);
}
.badge:empty { display: none; }
.rounded-pill.badge,
.badge.rounded-pill { border-radius: var(--pg-ui-border-radius-pill); }

/* ===================== 提示框 ===================== */
.alert {
    position: relative;
    padding: 1rem 1rem;
    margin-bottom: 1rem;
    border: var(--pg-ui-border-width) solid transparent;
    border-radius: var(--pg-ui-border-radius);
}
.alert-heading { color: inherit; }
.alert-link { font-weight: 700; }
.alert-dismissible { padding-right: 3rem; }
.alert-dismissible .btn-close { position: absolute; top: 0; right: 0; z-index: 2; padding: 1.25rem 1rem; }
.alert-primary { color: #084298; background-color: #cfe2ff; border-color: #b6d4fe; }
.alert-secondary { color: #41464b; background-color: #e2e3e5; border-color: #d3d6d8; }
.alert-success { color: #0f5132; background-color: #d1e7dd; border-color: #badbcc; }
.alert-info { color: #055160; background-color: #cff4fc; border-color: #b6effb; }
.alert-warning { color: #664d03; background-color: #fff3cd; border-color: #ffecb5; }
.alert-danger { color: #842029; background-color: #f8d7da; border-color: #f5c2c7; }
.alert-light { color: #636464; background-color: #fefefe; border-color: #fdfdfe; }
.alert-dark { color: #141619; background-color: #d3d3d4; border-color: #bcbebf; }

/* ===================== 卡片 ===================== */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100%;
    background-color: var(--pg-ui-body-bg);
    background-clip: border-box;
    border: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
    border-radius: var(--pg-ui-border-radius);
}
.card > hr { margin-right: 0; margin-left: 0; }
.card-header {
    padding: .5rem 1rem;
    margin-bottom: 0;
    color: rgba(33, 37, 41, .75);
    background-color: var(--pg-ui-tertiary-bg);
    border-bottom: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
}
.card-header:first-child { border-radius: calc(var(--pg-ui-border-radius) - 1px) calc(var(--pg-ui-border-radius) - 1px) 0 0; }
.card-body { flex: 1 1 auto; padding: 1rem 1rem; }
.card-title { margin-bottom: .5rem; }
.card-subtitle { margin-top: -.25rem; margin-bottom: 0; }
.card-text:last-child { margin-bottom: 0; }
.card-footer {
    padding: .5rem 1rem;
    background-color: var(--pg-ui-tertiary-bg);
    border-top: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
}

/* ===================== 导航 / 标签页 / 面包屑 ===================== */
.nav { display: flex; flex-wrap: wrap; padding-left: 0; margin-bottom: 0; list-style: none; }
.nav-link {
    display: block;
    padding: .5rem 1rem;
    font-size: 1rem;
    font-weight: 400;
    color: var(--pg-ui-link-color);
    text-decoration: none;
    background: none;
    border: 0;
    transition: color var(--pg-ui-transition), background-color var(--pg-ui-transition);
}
.nav-link:hover, .nav-link:focus { color: var(--pg-ui-link-hover-color); text-decoration: none; }
.nav-link.disabled { color: var(--pg-ui-secondary-color); pointer-events: none; cursor: default; }

.nav-tabs { border-bottom: var(--pg-ui-border-width) solid var(--pg-ui-border-color); }
.nav-tabs .nav-link {
    margin-bottom: calc(-1 * var(--pg-ui-border-width));
    background: none;
    border: var(--pg-ui-border-width) solid transparent;
    border-top-left-radius: var(--pg-ui-border-radius);
    border-top-right-radius: var(--pg-ui-border-radius);
}
.nav-tabs .nav-link:hover, .nav-tabs .nav-link:focus { border-color: var(--pg-ui-secondary-bg) var(--pg-ui-secondary-bg) var(--pg-ui-border-color); }
.nav-tabs .nav-link.active,
.nav-tabs .nav-item.show .nav-link {
    color: var(--pg-ui-emphasis-color);
    background-color: var(--pg-ui-body-bg);
    border-color: var(--pg-ui-border-color) var(--pg-ui-border-color) var(--pg-ui-body-bg);
}
.nav-pills .nav-link { background: none; border: 0; border-radius: var(--pg-ui-border-radius); }
.nav-pills .nav-link.active { color: #fff; background-color: var(--pg-ui-primary); }

.breadcrumb { display: flex; flex-wrap: wrap; padding: 0; margin-bottom: 1rem; list-style: none; }
.breadcrumb-item + .breadcrumb-item { padding-left: .5rem; }
.breadcrumb-item + .breadcrumb-item::before {
    float: left;
    padding-right: .5rem;
    color: var(--pg-ui-secondary-color);
    content: '/';
}
.breadcrumb-item.active { color: var(--pg-ui-secondary-color); }

/* ===================== 下拉菜单 ===================== */
.dropdown, .dropup, .dropend, .dropstart { position: relative; }
.dropdown-toggle { white-space: nowrap; }
.dropdown-toggle::after {
    display: inline-block;
    margin-left: .255em;
    vertical-align: .255em;
    content: '';
    border-top: .3em solid;
    border-right: .3em solid transparent;
    border-bottom: 0;
    border-left: .3em solid transparent;
}
.dropdown-toggle:empty::after { margin-left: 0; }

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: .125rem;
    z-index: var(--pg-ui-z-dropdown);
    display: none;
    min-width: 10rem;
    padding: .5rem 0;
    margin: 0;
    font-size: 1rem;
    color: var(--pg-ui-body-color);
    text-align: left;
    list-style: none;
    background-color: var(--pg-ui-body-bg);
    background-clip: padding-box;
    border: var(--pg-ui-border-width) solid var(--pg-ui-border-color-translucent);
    border-radius: var(--pg-ui-border-radius);
    box-shadow: var(--pg-ui-box-shadow);
}
.dropdown-menu-end { right: 0; left: auto; }
.dropdown-menu.show, .dropdown > .dropdown-menu.is-show { display: block; }
.dropdown-item {
    display: block;
    width: 100%;
    padding: .25rem 1rem;
    clear: both;
    font-weight: 400;
    color: var(--pg-ui-body-color);
    text-align: inherit;
    text-decoration: none;
    white-space: nowrap;
    background-color: transparent;
    border: 0;
    border-radius: 0;
}
.dropdown-item:hover, .dropdown-item:focus { color: var(--pg-ui-emphasis-color); background-color: var(--pg-ui-secondary-bg); }
.dropdown-item.active, .dropdown-item:active { color: #fff; text-decoration: none; background-color: var(--pg-ui-primary); }
.dropdown-item.disabled, .dropdown-item:disabled { color: var(--pg-ui-tertiary-color); pointer-events: none; background-color: transparent; }
.dropdown-header { display: block; padding: .5rem 1rem; margin-bottom: 0; font-size: .875rem; color: var(--pg-ui-secondary-color); white-space: nowrap; }
.dropdown-divider { height: 0; margin: .5rem 0; overflow: hidden; border-top: 1px solid var(--pg-ui-border-color-translucent); opacity: 1; }
.dropdown-item-text { display: block; padding: .25rem 1rem; color: var(--pg-ui-body-color); }

/* ===================== 模态框 ===================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    z-index: var(--pg-ui-z-modal);
    display: none;
    width: 100%;
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    outline: 0;
}
.modal.show { display: block; }
.modal-dialog {
    position: relative;
    width: auto;
    margin: .5rem;
    pointer-events: none;
}
/* 只保留淡入淡出，不做上下位移过渡（位移会造成弹窗出现时上下闪跳） */
.modal.fade .modal-dialog,
.modal.show .modal-dialog { transform: none; transition: none; }
.modal-dialog-centered { display: flex; align-items: center; min-height: calc(100% - 1rem); }
.modal-dialog-scrollable { max-height: calc(100% - 1rem); }
.modal-dialog-scrollable .modal-content { max-height: 100%; overflow: hidden; }
.modal-dialog-scrollable .modal-body { overflow-y: auto; }
.modal-content {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    color: var(--pg-ui-body-color);
    pointer-events: auto;
    background-color: var(--pg-ui-body-bg);
    background-clip: padding-box;
    border: var(--pg-ui-border-width) solid var(--pg-ui-border-color-translucent);
    border-radius: var(--pg-ui-border-radius-lg);
    outline: 0;
}
.modal-header {
    display: flex;
    flex-shrink: 0;
    align-items: center;
    padding: 1rem 1rem;
    border-bottom: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
    border-top-left-radius: calc(var(--pg-ui-border-radius-lg) - 1px);
    border-top-right-radius: calc(var(--pg-ui-border-radius-lg) - 1px);
}
.modal-title { margin-bottom: 0; line-height: 1.5; }
.modal-body { position: relative; flex: 1 1 auto; padding: 1rem; }
.modal-footer {
    display: flex;
    flex-wrap: wrap;
    flex-shrink: 0;
    align-items: center;
    justify-content: flex-end;
    padding: .75rem;
    border-top: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
    border-bottom-right-radius: calc(var(--pg-ui-border-radius-lg) - 1px);
    border-bottom-left-radius: calc(var(--pg-ui-border-radius-lg) - 1px);
}
.modal-footer > * { margin: .25rem; }

@media (min-width: 576px) {
    .modal-dialog { max-width: 500px; margin: 1.75rem auto; }
    .modal-dialog-centered { min-height: calc(100% - 3.5rem); }
    .modal-dialog-scrollable { max-height: calc(100% - 3.5rem); }
    .modal-sm { max-width: 300px; }
}
@media (min-width: 992px) {
    .modal-lg, .modal-xl { max-width: 800px; }
}
@media (min-width: 1200px) {
    .modal-xl { max-width: 1140px; }
}

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    z-index: var(--pg-ui-z-modal-backdrop);
    width: 100vw;
    height: 100vh;
    background-color: #000;
}
.modal-backdrop.fade { opacity: 0; }
.modal-backdrop.show { opacity: .5; }

.fade { transition: opacity .15s linear; }
.fade:not(.show) { opacity: 0; }

/* ===================== 分页 ===================== */
.modal-header .btn-close { padding: .5rem .5rem; margin: -.5rem -.5rem -.5rem auto; }

.pagination { display: flex; padding-left: 0; list-style: none; }
.page-link {
    position: relative;
    display: block;
    padding: .375rem .75rem;
    font-size: 1rem;
    color: var(--pg-ui-link-color);
    text-decoration: none;
    background-color: var(--pg-ui-body-bg);
    border: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
    transition: color var(--pg-ui-transition), background-color var(--pg-ui-transition),
                border-color var(--pg-ui-transition), box-shadow var(--pg-ui-transition);
}
.page-link:hover { color: var(--pg-ui-link-hover-color); background-color: var(--pg-ui-secondary-bg); border-color: var(--pg-ui-border-color); text-decoration: none; }
.page-link:focus { outline: 0; box-shadow: var(--pg-ui-focus-ring); }
.page-item:first-child .page-link { border-top-left-radius: var(--pg-ui-border-radius); border-bottom-left-radius: var(--pg-ui-border-radius); }
.page-item:last-child .page-link { border-top-right-radius: var(--pg-ui-border-radius); border-bottom-right-radius: var(--pg-ui-border-radius); }
.page-item:not(:first-child) .page-link { margin-left: calc(var(--pg-ui-border-width) * -1); }
.page-item.active .page-link { z-index: 3; color: #fff; background-color: var(--pg-ui-primary); border-color: var(--pg-ui-primary); }
.page-item.disabled .page-link { color: var(--pg-ui-secondary-color); pointer-events: none; background-color: var(--pg-ui-body-bg); border-color: var(--pg-ui-border-color); }

/* ===================== 进度条 / 加载动画 ===================== */
.progress {
    display: flex;
    height: 1rem;
    overflow: hidden;
    font-size: .75rem;
    background-color: var(--pg-ui-secondary-bg);
    border-radius: var(--pg-ui-border-radius);
}
.progress-bar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    background-color: var(--pg-ui-primary);
    transition: width .6s ease;
}
.progress-bar-striped {
    background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%,
                      transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%,
                      transparent 75%, transparent);
    background-size: 1rem 1rem;
}
.progress-bar-animated { animation: pg-progress-bar-stripes 1s linear infinite; }
@keyframes pg-progress-bar-stripes { 0% { background-position-x: 1rem; } }

.spinner-border {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    vertical-align: -.125em;
    border: .25em solid currentcolor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: pg-spinner-border .75s linear infinite;
}
.spinner-border-sm { width: 1rem; height: 1rem; border-width: .2em; }
@keyframes pg-spinner-border { to { transform: rotate(360deg); } }

.spinner-grow {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    vertical-align: -.125em;
    background-color: currentcolor;
    border-radius: 50%;
    opacity: 0;
    animation: pg-spinner-grow .75s linear infinite;
}
.spinner-grow-sm { width: 1rem; height: 1rem; }
@keyframes pg-spinner-grow { 0% { transform: scale(0); } 50% { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
    .spinner-border, .spinner-grow { animation-duration: 1.5s; }
    .progress-bar { transition: none; }
}

/* ===================== 列表组 ===================== */
.list-group { display: flex; flex-direction: column; padding-left: 0; margin-bottom: 0; border-radius: var(--pg-ui-border-radius); }
.list-group-item {
    position: relative;
    display: block;
    padding: .5rem 1rem;
    color: var(--pg-ui-body-color);
    text-decoration: none;
    background-color: var(--pg-ui-body-bg);
    border: var(--pg-ui-border-width) solid var(--pg-ui-border-color);
}
.list-group-item:first-child { border-top-left-radius: inherit; border-top-right-radius: inherit; }
.list-group-item:last-child { border-bottom-right-radius: inherit; border-bottom-left-radius: inherit; }
.list-group-item + .list-group-item { border-top-width: 0; }
.list-group-item.active { z-index: 2; color: #fff; background-color: var(--pg-ui-primary); border-color: var(--pg-ui-primary); }
.list-group-item.disabled { color: var(--pg-ui-secondary-color); pointer-events: none; background-color: var(--pg-ui-body-bg); }

/* ===================== 辅助 ===================== */
.stretched-link::after { position: absolute; inset: 0; z-index: 1; content: ''; }
.visually-hidden {
    position: absolute !important;
    width: 1px !important; height: 1px !important;
    padding: 0 !important; margin: -1px !important;
    overflow: hidden !important; clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important; border: 0 !important;
}
.text-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vr { display: inline-block; align-self: stretch; width: 1px; min-height: 1em; background-color: currentcolor; opacity: .25; }