@charset "utf-8";

/* ==========================================================================
   积分互通开放平台 · 全站样式
   结构：变量与主题 → 基础重置 → 布局三段式 → 导航 → 卡片/表格/表单
        → 反馈组件（toast / modal） → FAB → 备案条 → 响应式
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计令牌（浅色为默认，[data-theme="dark"] 覆盖深色）
   -------------------------------------------------------------------------- */
:root {
  color-scheme: light;

  /* 基础色 */
  --bg: #f4f6fa;
  --bg-soft: #eceff5;
  --surface: #ffffff;
  --surface-2: #f7f9fc;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;

  /* 语义色 */
  --primary: #2563eb;
  --primary-soft: rgba(37, 99, 235, 0.1);
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.1);
  --success: #16a34a;
  --success-soft: rgba(22, 163, 74, 0.1);
  --warning: #d97706;
  --warning-soft: rgba(217, 119, 6, 0.12);

  /* 毛玻璃 */
  --glass: rgba(255, 255, 255, 0.72);
  --glass-strong: rgba(255, 255, 255, 0.9);

  /* 阴影 / 圆角 */
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow: 0 4px 16px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.14);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;

  /* 尺寸 */
  --nav-h: 56px;
  --bar-h: 44px;
  --maxw: 1280px;

  /* 层级 */
  --z-cursor: 0;
  --z-content: 1;
  --z-bar: 40;
  --z-nav: 50;
  --z-fab: 60;
  --z-toast: 80;
  --z-modal: 100;
}

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

  --bg: #0f1419;
  --bg-soft: #141b23;
  --surface: #171d26;
  --surface-2: #1d242f;
  --text: #e5e7eb;
  --muted: #9aa4b2;
  --border: #2a3340;

  --primary: #3b82f6;
  --primary-soft: rgba(59, 130, 246, 0.16);
  --danger: #ef4444;
  --danger-soft: rgba(239, 68, 68, 0.16);
  --success: #22c55e;
  --success-soft: rgba(34, 197, 94, 0.16);
  --warning: #f59e0b;
  --warning-soft: rgba(245, 158, 11, 0.18);

  --glass: rgba(15, 20, 25, 0.72);
  --glass-strong: rgba(23, 29, 38, 0.92);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.55);
}

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

/* 禁止横向滚动：html 与 body 同时限制 */
html,
body {
  max-width: 100%;
  overflow-x: hidden;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  /* 顶部让位固定导航，底部让位悬浮备案条 + FAB */
  padding-top: var(--nav-h);
  padding-bottom: calc(var(--bar-h) + 24px);
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* 长文本强制换行，杜绝撑破布局 */
p,
li,
dd,
dt,
td,
th,
label,
h1,
h2,
h3,
h4,
h5,
h6,
a,
code,
pre {
  overflow-wrap: break-word;
  word-break: break-word;
}

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

a:hover {
  text-decoration: underline;
}

img,
svg,
canvas {
  max-width: 100%;
  height: auto;
}

code,
.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono",
    monospace;
  font-size: 0.92em;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 8px;
  font-weight: 600;
  line-height: 1.35;
}

h1 { font-size: 22px; }
h2 { font-size: 18px; }
h3 { font-size: 16px; }
h4 { font-size: 14px; }

p { margin: 0 0 10px; }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}

/* 焦点可见性（键盘可达性） */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   3. 三段式布局：固定导航 / 主体 / 悬浮备案条
   -------------------------------------------------------------------------- */

/* 3.1 顶部固定毛玻璃导航 */
.app-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-h);
  background: var(--glass);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

/* 门户隔离：三个独立入口的顶栏强调色各自独立，避免功能视觉混淆 */
.app-nav--kf {
  --primary: #0ea5a4;
  --primary-soft: rgba(14, 165, 164, 0.14);
  border-bottom-color: rgba(14, 165, 164, 0.35);
}
.app-nav--admin {
  --primary: #7c3aed;
  --primary-soft: rgba(124, 58, 237, 0.14);
  border-bottom-color: rgba(124, 58, 237, 0.35);
}

/* 切换门户分组：弱化样式，明确与当前门户主功能区分，不串台 */
.nav-group--switch {
  margin-left: auto;
  padding-left: 10px;
  border-left: 1px dashed var(--border);
  opacity: 0.92;
}
.nav-link--switch {
  font-size: 12px;
  color: var(--muted);
}
.nav-link--switch:hover {
  color: var(--primary);
  text-decoration: none;
}

.app-nav__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 16px;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
}

.nav-brand:hover {
  text-decoration: none;
}

.nav-brand__logo {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  font-size: 13px;
}

/* 汉堡按钮（仅窄屏显示） */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: relative;
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 3px; }

.app-nav.is-open .nav-toggle__bars { background: transparent; }
.app-nav.is-open .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.app-nav.is-open .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

/* 导航菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1 1 auto;
  min-width: 0;
}

.nav-group {
  display: flex;
  align-items: center;
  gap: 2px;
  min-width: 0;
}

.nav-group + .nav-group {
  margin-left: 8px;
  padding-left: 10px;
  border-left: 1px solid var(--border);
}

.nav-group__label {
  color: var(--muted);
  font-size: 12px;
  padding-right: 4px;
  white-space: nowrap;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.nav-link:hover {
  background: var(--surface-2);
  color: var(--text);
  text-decoration: none;
}

.nav-link.is-active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  margin-left: auto;
}

/* 主题切换按钮 */
.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.theme-toggle:hover {
  background: var(--surface-2);
  transform: rotate(-15deg);
}

.theme-toggle__icon { width: 17px; height: 17px; }
/* 亮色下显示月亮，暗色下显示太阳 */
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

/* 用户区（hover / focus 展开下拉，无需 JS） */
.nav-user {
  position: relative;
}

.nav-user__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px 4px 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}

.nav-user__avatar {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  overflow: hidden;
  flex: 0 0 auto;
}

.nav-user__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.nav-user__name {
  max-width: 96px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-user__menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 168px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--glass-strong);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
}

.nav-user:hover .nav-user__menu,
.nav-user:focus-within .nav-user__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-user__menu a,
.nav-user__menu button {
  display: block;
  width: 100%;
  padding: 7px 10px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text);
  font-size: 13px;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.nav-user__menu a:hover,
.nav-user__menu button:hover {
  background: var(--surface-2);
  text-decoration: none;
}

.nav-user__menu .is-danger { color: var(--danger); }

/* 3.2 主体内容区 */
.page-main {
  position: relative;
  z-index: var(--z-content);
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 16px 8px;
}

.page-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.page-head__title {
  margin: 0;
  font-size: 20px;
}

.page-head__desc {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

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

/* 消息容器（服务端 flash 提示） */
.page-messages {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 16px 0;
}

.page-messages:empty {
  display: none;
}

/* 3.3 底部半透明悬浮备案条 */
.site-footer-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-bar);
  min-height: var(--bar-h);
  display: flex;
  align-items: center;
  background: var(--glass);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
}

.site-footer-bar__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px 14px;
  flex-wrap: wrap;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 10px 16px;
  text-align: center;
}

.site-footer-bar a {
  color: var(--muted);
}

.site-footer-bar a:hover {
  color: var(--primary);
}

.site-footer-bar__sep {
  opacity: 0.4;
}

/* --------------------------------------------------------------------------
   4. 卡片区（CSS Grid 自适应）
   -------------------------------------------------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-soft);
  box-shadow: var(--shadow);
}

.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 16px 0;
}

.card__title {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
}

.card__body {
  padding: 12px 16px;
  min-width: 0;
}

.card__foot {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 10px 16px 14px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
}

.card--flat:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
}

/* 统计数字块 */
.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.stat__label {
  color: var(--muted);
  font-size: 12px;
}

.stat__value {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat__value--primary { color: var(--primary); }
.stat__value--success { color: var(--success); }
.stat__value--danger { color: var(--danger); }

/* --------------------------------------------------------------------------
   5. 表格（窄屏横向滚动，不撑破页面）
   -------------------------------------------------------------------------- */
.table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 13px;
}

.table th,
.table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}

.table th {
  background: var(--surface-2);
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}

.table tbody tr:last-child td {
  border-bottom: 0;
}

.table tbody tr:hover {
  background: var(--surface-2);
}

.table .num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* --------------------------------------------------------------------------
   6. 按钮 / 徽标 / 表单
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  line-height: 1.4;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  background: var(--surface-2);
  text-decoration: none;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn--primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--primary);
  filter: brightness(1.08);
}

.btn--danger {
  border-color: var(--danger);
  background: var(--danger);
  color: #fff;
}

.btn--danger:hover {
  filter: brightness(1.08);
}

.btn--ghost {
  background: transparent;
}

.btn--sm {
  padding: 4px 10px;
  font-size: 12px;
}

.btn--block {
  width: 100%;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--surface-2);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
  white-space: nowrap;
}

.badge--primary { background: var(--primary-soft); color: var(--primary); }
.badge--success { background: var(--success-soft); color: var(--success); }
.badge--danger { background: var(--danger-soft); color: var(--danger); }
.badge--warning { background: var(--warning-soft); color: var(--warning); }

.form {
  display: grid;
  gap: 14px;
  max-width: 460px;
}

.form-row {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.form-label {
  color: var(--muted);
  font-size: 13px;
}

.input,
.select,
.textarea {
  width: 100%;
  max-width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-size: 14px; /* 移动端 >=16px 需单独放大，见响应式段 */
  font-family: inherit;
  line-height: 1.5;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.textarea {
  min-height: 88px;
  resize: vertical;
}

.form-hint {
  color: var(--muted);
  font-size: 12px;
}

.form-error {
  color: var(--danger);
  font-size: 12px;
}

/* --------------------------------------------------------------------------
   7. 提示条 / 空状态 / 折叠块
   -------------------------------------------------------------------------- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
}

.alert--info { border-color: var(--primary-soft); background: var(--primary-soft); color: var(--primary); }
.alert--success { border-color: var(--success-soft); background: var(--success-soft); color: var(--success); }
.alert--danger { border-color: var(--danger-soft); background: var(--danger-soft); color: var(--danger); }

.empty {
  padding: 40px 16px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

/* details / summary：移动端承载次要内容折叠 */
.details {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  overflow: hidden;
}

.details + .details {
  margin-top: 8px;
}

.details > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 12px;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  list-style: none;
  cursor: pointer;
  user-select: none;
}

.details > summary::-webkit-details-marker {
  display: none;
}

.details > summary::after {
  content: "";
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.details[open] > summary::after {
  transform: rotate(-135deg);
}

.details[open] > summary {
  border-bottom: 1px solid var(--border);
}

.details__body {
  padding: 10px 12px;
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   8. 鼠标跟随画布（JS 动态插入，层级最低，不拦截事件）
   -------------------------------------------------------------------------- */
.ph-cursor {
  position: fixed;
  inset: 0;
  z-index: var(--z-cursor);
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   9. Toast
   -------------------------------------------------------------------------- */
.toast-host {
  position: fixed;
  top: calc(var(--nav-h) + 12px);
  left: 50%;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  width: max-content;
  max-width: calc(100vw - 32px);
  transform: translateX(-50%);
  pointer-events: none;
}

.toast {
  max-width: 100%;
  padding: 9px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--glass-strong);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 13px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.is-in {
  opacity: 1;
  transform: translateY(0);
}

.toast--success { border-color: var(--success-soft); color: var(--success); }
.toast--danger { border-color: var(--danger-soft); color: var(--danger); }
.toast--warning { border-color: var(--warning-soft); color: var(--warning); }
.toast--info { border-color: var(--primary-soft); color: var(--primary); }

/* --------------------------------------------------------------------------
   10. 确认弹层
   -------------------------------------------------------------------------- */
.ph-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity 0.16s ease;
}

.ph-modal.is-in {
  opacity: 1;
}

.ph-modal__panel {
  width: 100%;
  max-width: 380px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  transform: translateY(8px);
  transition: transform 0.16s ease;
}

.ph-modal.is-in .ph-modal__panel {
  transform: translateY(0);
}

.ph-modal__title {
  margin: 0 0 8px;
  font-size: 15px;
}

.ph-modal__body {
  color: var(--muted);
  font-size: 13px;
  overflow-wrap: break-word;
}

.ph-modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 18px;
}

/* --------------------------------------------------------------------------
   11. 浮动操作按钮 FAB
   -------------------------------------------------------------------------- */
.fab {
  position: fixed;
  right: 16px;
  bottom: calc(var(--bar-h) + 20px);
  z-index: var(--z-fab);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

.fab__menu {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
}

.fab.is-open .fab__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.fab__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--glass-strong);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  white-space: nowrap;
  cursor: pointer;
}

.fab__item:hover {
  border-color: var(--primary-soft);
  color: var(--primary);
}

.fab__toggle {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: transform 0.18s ease, filter 0.18s ease;
}

.fab__toggle:hover {
  filter: brightness(1.08);
}

.fab__toggle svg {
  width: 20px;
  height: 20px;
  transition: transform 0.2s ease;
}

.fab.is-open .fab__toggle svg {
  transform: rotate(45deg);
}

/* --------------------------------------------------------------------------
   12. 工具类
   -------------------------------------------------------------------------- */
.muted { color: var(--muted); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.nowrap { white-space: nowrap; }

.flex { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.between { justify-content: space-between; }
.mt-0 { margin-top: 0; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-0 { margin-bottom: 0; }
.mb-16 { margin-bottom: 16px; }

.panel {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

/* --------------------------------------------------------------------------
   13. 响应式：<768px 折叠导航 + 移动端细节
   -------------------------------------------------------------------------- */
@media (max-width: 767px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-brand__text {
    display: none;
  }

  /* 导航项折叠为下拉面板 */
  .nav-menu {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    max-height: calc(100vh - var(--nav-h) - var(--bar-h));
    overflow-y: auto;
    padding: 10px 16px 16px;
    background: var(--glass-strong);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .app-nav.is-open .nav-menu {
    display: flex;
  }

  .nav-group {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-group + .nav-group {
    margin-left: 0;
    padding-left: 0;
    padding-top: 8px;
    border-left: 0;
    border-top: 1px solid var(--border);
  }

  .nav-group__label {
    padding: 4px 10px 2px;
  }

  .nav-link {
    padding: 10px 12px;
    font-size: 14px;
  }

  .page-main {
    padding: 14px 12px 8px;
  }

  .page-messages {
    padding: 10px 12px 0;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* 移动端表单字号 >= 16px，避免 iOS 自动放大页面 */
  .input,
  .select,
  .textarea {
    font-size: 16px;
  }

  /* 移动端用户下拉改为内嵌，避免绝对定位溢出屏幕 */
  .nav-user__menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: transparent;
    border: 0;
    padding: 0 0 0 12px;
    backdrop-filter: none;
  }

  .nav-user {
    width: 100%;
  }

  .nav-user__btn {
    width: 100%;
    justify-content: flex-start;
  }

  .site-footer-bar__inner {
    gap: 2px 8px;
    font-size: 11px;
  }

  .site-footer-bar__sep {
    display: none;
  }

  .fab {
    right: 12px;
  }
}

/* --------------------------------------------------------------------------
   14. 动效降级：尊重系统「减少动态效果」偏好
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* 打印：隐藏固定层，避免遮挡 */
@media print {
  .app-nav,
  .site-footer-bar,
  .fab,
  .toast-host,
  .ph-cursor {
    display: none !important;
  }

  body {
    padding: 0;
  }
}