/* ============================================================
   橙暖网站 — 公共样式表 common.css v3.1
   统一全站：色彩 / 阴影 / 导航 / 页脚 / 基础组件
   v3.1: +骨架屏 +徽章/芯片 +分割线 +打印样式 +动画无障碍
         +按钮扩展(ghost/icon) +标签页标准化 +聚焦环增强
   ============================================================ */

/* ==================== CSS 变量 ==================== */
:root {
  /* 主色调 — 阳光橙 */
  --orange-deep:  #e65100;
  --orange-main:  #ff6b00;
  --orange-bright:#ff8c00;
  --orange-light: #ffb74d;
  --orange-pale:  #ffcc80;
  --orange-warm:  #ffe0b2;
  --orange-bg:    #fff5e6;

  /* 辅助色 — 树洞棕 */
  --brown-dark:   #6B4226;
  --brown-main:   #8B7355;
  --brown-light:  #c9b896;
  --brown-pale:   #f5e8d0;

  /* 功能色 */
  --green-ok:     #4caf50;
  --red-err:      #e74c3c;
  --white:        #ffffff;
  --text-primary: #333333;
  --text-secondary: #6d6d6d;  /* WCAG AA 4.58:1 on #fff5e6 — fixes #16 */
  --text-muted:   #888888;

  /* 阴影系统 — 3级海拔 (#6) */
  --shadow-1: 0 2px 8px  rgba(0,0,0,0.04);  /* 微浮：卡片常态、hover浅层 */
  --shadow-2: 0 4px 18px rgba(0,0,0,0.07);  /* 中层：卡片、表单、面板 */
  --shadow-3: 0 12px 35px rgba(0,0,0,0.12); /* 高层：模态、下拉菜单、Toast */

  /* 圆角系统 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 50%;

  /* 间距 */
  --space-xs: 6px;
  --space-sm: 12px;
  --space-md: 20px;
  --space-lg: 35px;
  --space-xl: 50px;

  /* 过渡 */
  --ease-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --trans-fast: 0.2s;
  --trans-normal: 0.3s;
  --trans-slow: 0.5s;
}

/* Font Awesome CDN 降级：保留图标占位空间，防止布局塌陷 */
.fa, .fas, .far, .fab, .fal, .fad, .fa-solid, .fa-regular, .fa-brands {
    display: inline-block;
    min-width: 1em;
    min-height: 1em;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--orange-bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--orange-bright); text-decoration: none; }
a:hover { color: var(--orange-main); }

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

/* ==================== 原生 App 增强 (Capacitor) ==================== */
/* 安全区域 — iPhone X+ 刘海屏适配 */
:root {
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

body.app-native {
  /* 安全区域内边距 */
  padding-top: var(--safe-top);
  padding-bottom: calc(var(--safe-bottom) + 70px); /* 70px 留给底部导航 */
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
  /* 原生滚动体验 */
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
  /* 禁止文本选择（原生感） */
  -webkit-user-select: none;
  user-select: none;
  /* 点击高亮 */
  -webkit-tap-highlight-color: rgba(255,140,0,0.12);
}

/* 允许输入框内文本选择 */
body.app-native input,
body.app-native textarea,
body.app-native [contenteditable] {
  -webkit-user-select: text;
  user-select: text;
}

/* ==================== 底部标签栏 (仅 Capacitor 原生模式显示) ==================== */
.app-bottom-nav {
  display: none;
}
body.app-native .app-bottom-nav {
  display: flex;
  position: fixed;
  top: auto;
  height: auto;
  max-height: none;
  bottom: 0; left: 0; right: 0;
  z-index: 200;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(0,0,0,0.08);
  padding: 6px 0 calc(6px + env(safe-area-inset-bottom, 0px));
  justify-content: space-around;
  align-items: flex-start;
  box-shadow: 0 -2px 20px rgba(0,0,0,0.06);
}
body.mobile-app-shell .app-bottom-nav {
  display: flex;
  position: fixed;
  top: auto;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  justify-content: space-around;
  align-items: flex-start;
  background: rgba(255,255,255,0.96);
  border-top: 1px solid rgba(0,0,0,0.08);
  padding: 4px 0 calc(4px + env(safe-area-inset-bottom, 0px));
  box-shadow: 0 -2px 20px rgba(0,0,0,0.06);
}
.app-bottom-nav a {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.65rem;
  padding: 4px 10px;
  min-width: 52px;
  min-height: 48px;
  justify-content: center;
  transition: color 0.2s;
  border-radius: 12px;
}
.app-bottom-nav a i {
  font-size: 1.25rem;
  transition: transform 0.2s;
}
.app-bottom-nav a.active {
  color: var(--orange-bright);
}
.app-bottom-nav a.active i {
  transform: translateY(-2px);
}
.app-bottom-nav a:active {
  background: var(--orange-bg);
}

/* 底部导航存在时，页脚增加间距 */
body.app-native footer {
  margin-bottom: 70px;
}

/* ==================== 导航栏 (全站统一) ==================== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.93);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0 30px;
  box-shadow: 0 1px 15px rgba(0,0,0,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
}

nav .brand {
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--orange-main);
  padding: 15px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

nav .brand img { height: 34px; }

nav .links {
  display: flex;
  gap: 3px;
  flex-wrap: nowrap;
  align-items: center;
  overflow: visible;
}
@media (max-width: 768px) {
  nav .links { overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  nav .links::-webkit-scrollbar { display: none; }
}

nav .links a {
  text-decoration: none;
  color: var(--text-secondary);
  padding: 10px 16px;
  border-radius: 10px;
  transition: all var(--trans-normal);
  font-size: 0.95rem;
  white-space: nowrap;
  flex-shrink: 0;
}
nav .links a:hover,
nav .links a.active {
  color: var(--orange-main);
  background: var(--orange-bg);
}

/* 导航 — 横滑提示渐变遮罩 (mobile) */
.nav-scroll-hint {
  position: absolute; right: 0; top: 0; bottom: 0;
  width: 40px;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.93));
  pointer-events: none;
  display: none;
}

/* 汉堡菜单按钮 (mobile) */
.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--orange-main);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background var(--trans-fast);
}
.hamburger:hover { background: var(--orange-bg); }

/* 登录按钮 — 统一橙色 (#4) */
.login-btn {
  background: var(--orange-bright) !important;
  color: white !important;
  border-radius: 24px !important;
  padding: 8px 20px !important;
  font-weight: 600 !important;
  transition: all var(--trans-normal) !important;
}
.login-btn:hover {
  background: var(--orange-main) !important;
  color: white !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-1);
}

/* 管理按钮 */
.admin-btn {
  background: var(--orange-deep) !important;
  color: white !important;
  border-radius: 24px !important;
  padding: 8px 16px !important;
  font-size: 0.9rem !important;
  font-weight: 600 !important;
  text-decoration: none !important;
  display: inline-flex; align-items: center; gap: 6px;
  transition: all var(--trans-normal) !important;
}
.admin-btn:hover {
  background: #bf360c !important;
  color: white !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-1);
}

/* ==================== 用户下拉菜单（登录后右上角） ==================== */
.user-dropdown {
  position: relative; display: inline-flex;
}
/* 触发按钮 — 圆角 pill */
.user-dropdown-trigger {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 24px; border: none;
  background: var(--orange-bg); color: var(--orange-main);
  font-size: 0.88rem; font-family: inherit; cursor: pointer;
  font-weight: 600; transition: all var(--trans-normal); white-space: nowrap;
  position: relative;
}
.user-dropdown-trigger:hover { background: var(--orange-warm); }
.nav-avatar-img {
  width: 26px; height: 26px; border-radius: 50%; object-fit: cover; flex-shrink: 0;
}
.nav-avatar-initial {
  width: 26px; height: 26px; border-radius: 50%;
  background: linear-gradient(135deg, var(--orange-bright), var(--orange-main));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 0.8rem; font-weight: 700; flex-shrink: 0;
}
.user-dropdown-trigger .fa-caret-down {
  font-size: 0.65rem; margin-left: 2px; transition: transform 0.2s;
}
.user-dropdown.open .user-dropdown-trigger .fa-caret-down { transform: rotate(180deg); }
/* 未读消息红点角标 */
.user-dropdown-trigger .unread-dot {
  position: absolute; top: 2px; right: 6px;
  min-width: 18px; height: 18px; line-height: 18px; text-align: center;
  border-radius: 9px; background: var(--red-err); color: #fff;
  font-size: 0.65rem; font-weight: 700; padding: 0 5px;
  display: none;
}
.user-dropdown-trigger .unread-dot.show { display: block; }
/* 下拉面板 */
.user-dropdown-menu {
  display: none; position: absolute; top: calc(100% + 8px); right: 0;
  background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-3);
  min-width: 165px; padding: 6px 0; z-index: 110;
  border: 1px solid #f0e8d0;
}
.user-dropdown.open .user-dropdown-menu { display: block; }
/* 面板头部 — 用户信息 */
.user-dropdown-header {
  padding: 10px 16px 8px; border-bottom: 1px solid #f5ece4;
  display: flex; align-items: center; gap: 8px;
}
.user-dropdown-header .user-name {
  font-weight: 600; color: var(--text-primary); font-size: 0.9rem;
}
.user-dropdown-header .user-id {
  color: var(--text-muted); font-size: 0.72rem;
}
/* 菜单项 */
.user-dropdown-menu a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 18px; font-size: 0.88rem; color: var(--text-secondary);
  text-decoration: none; transition: all 0.15s;
}
.user-dropdown-menu a:hover { background: var(--orange-bg); color: var(--orange-deep); }
.user-dropdown-menu a .menu-icon { width: 18px; text-align: center; font-size: 0.9rem; }
.user-dropdown-menu .logout-item { color: var(--text-muted); }
.user-dropdown-menu .logout-item:hover { color: var(--red-err); background: #fff5f5; }
/* 分割线 */
.dropdown-divider { height: 1px; background: #f0e8d0; margin: 4px 0; }
/* 未读消息数角标(菜单项内) */
.user-dropdown-menu .menu-badge {
  margin-left: auto; background: var(--red-err); color: #fff;
  font-size: 0.68rem; font-weight: 700; padding: 1px 7px; border-radius: 10px;
  display: none;
}
.user-dropdown-menu .menu-badge.show { display: inline-block; }
/* 移动端 */
@media (max-width: 768px) {
  .user-dropdown-menu { right: -8px; min-width: 155px; }
  .user-dropdown-trigger { padding: 5px 10px; font-size: 0.82rem; }
}

/* 导航下拉菜单 */
.nav-dropdown { position: relative; display: inline-flex; }
.nav-dropdown > a { display: inline-flex; align-items: center; gap: 4px; }
.nav-dropdown-menu {
  display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  background: white; border-radius: var(--radius-md); box-shadow: var(--shadow-2);
  min-width: 140px; padding: 6px 0; z-index: 100;
  border: 1px solid #f0e8d0;
}
/* hover 下拉仅对鼠标设备生效（触屏不触发，防止 iOS sticky hover bug） */
@media (hover: hover) and (pointer: fine) {
  .nav-dropdown > a .fa-caret-down { font-size: 0.7rem; transition: transform 0.2s; }
  .nav-dropdown:hover > a .fa-caret-down { transform: rotate(180deg); }
  .nav-dropdown:hover .nav-dropdown-menu { display: block; }
}
/* 触屏设备：点击展开下拉 */
.nav-dropdown.open > a .fa-caret-down { transform: rotate(180deg); }
.nav-dropdown.open .nav-dropdown-menu { display: block; }
/* 移动端下拉菜单样式 */
@media (max-width: 768px) {
  .nav-dropdown { flex-direction: column; width: 100%; }
  .nav-dropdown > a { width: 100%; }
  .nav-dropdown-menu {
    position: static !important; transform: none !important;
    box-shadow: none; border: none; border-radius: 0;
    background: transparent; padding: 0 0 0 24px; min-width: auto;
  }
  .nav-dropdown-menu a { padding: 8px 14px; font-size: 0.85rem; }
  .nav-dropdown.open .nav-dropdown-menu { display: block !important; }
}
.nav-dropdown-menu a {
  display: block; padding: 8px 18px; font-size: 0.88rem; color: var(--text-secondary);
  text-decoration: none; white-space: nowrap; transition: all 0.15s;
}
.nav-dropdown-menu a:hover { background: var(--orange-bg); color: var(--orange-deep); }

/* ==================== Page Header (各页面差异化渐变色 #7) ==================== */
.page-header {
  text-align: center;
  padding: 85px 20px 55px;
  color: white;
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.12) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, rgba(255,200,100,0.1) 0%, transparent 40%);
  pointer-events: none;
}
.page-header h1 { font-size: 2.2rem; position: relative; }
.page-header p { opacity: 0.9; margin-top: 6px; position: relative; font-size: 0.95rem; }

/* 橙色 header — 部门介绍/报名/足迹 */
.page-header.orange { background: linear-gradient(135deg, #ff8c00, #e67700); }
/* 棕色 header — 树洞/关于我们 */
.page-header.brown  { background: linear-gradient(135deg, #8B7355, #6B4226, #8B6914); }
/* 深橙 header — 管理中心 */
.page-header.deep   { background: linear-gradient(135deg, #e65100, #bf360c); }

/* ==================== 内容容器 ==================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 30px 20px;
}
.container-narrow { max-width: 800px; }
.container-wide  { max-width: 1200px; }

/* ==================== 卡片组件 ==================== */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-2);
  border: 1px solid var(--brown-pale);
}
.card:hover { box-shadow: var(--shadow-2), 0 0 0 1px var(--orange-pale); }

/* ==================== 按钮组件 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: all var(--trans-normal);
  font-family: inherit;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 3px solid var(--orange-bright); outline-offset: 2px; }

.btn-primary {
  background: linear-gradient(135deg, var(--orange-bright), var(--orange-main));
  color: white;
  box-shadow: 0 4px 15px rgba(255,140,0,0.2);
}
.btn-primary:hover {
  box-shadow: 0 8px 25px rgba(255,140,0,0.35);
}

.btn-brown {
  background: linear-gradient(135deg, var(--brown-main), var(--brown-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(107,66,38,0.2);
}
.btn-brown:hover {
  box-shadow: 0 8px 25px rgba(107,66,38,0.35);
}

.btn-outline {
  background: var(--white);
  border: 2px solid var(--orange-bright);
  color: var(--orange-bright);
}
.btn-outline:hover {
  background: var(--orange-bg);
}

.btn-red {
    background: var(--red-err);
    color: white;
    border: none;
}
.btn-red:hover {
    background: #c0392b;
    box-shadow: 0 4px 15px rgba(231,76,60,0.2);
}
.btn-sm { padding: 6px 16px; font-size: 0.82rem; border-radius: var(--radius-sm); }

/* ==================== 表单基础 ==================== */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: #555;
  font-size: 0.9rem;
}
.form-group label i { color: var(--orange-bright); width: 20px; }

.form-input {
  width: 100%;
  padding: 13px 15px;
  border: 2px solid #eee;
  border-radius: var(--radius-md);
  font-size: 15px;
  transition: all var(--trans-normal);
  background: #fafafa;
  font-family: inherit;
}
.form-input:focus {
  border-color: var(--orange-bright);
  box-shadow: 0 0 0 3px rgba(255,140,0,0.1);
  outline: none;
  background: white;
}

/* 即时校验状态 (#9) */
.form-input.valid {
  border-color: var(--green-ok);
  box-shadow: 0 0 0 3px rgba(76,175,80,0.08);
}
.form-input.invalid {
  border-color: var(--red-err);
  box-shadow: 0 0 0 3px rgba(231,76,60,0.08);
}
.field-error {
  font-size: 0.78rem;
  color: var(--red-err);
  margin-top: 4px;
  display: none;
}
.field-error.show { display: block; }
.field-check {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--green-ok);
  font-size: 0.9rem;
  display: none;
}
.field-check.show { display: block; }

/* ==================== 页脚 (全站统一) ==================== */
footer {
  text-align: center;
  padding: 30px 20px;
  background: #333;
  color: #aaa;
  font-size: 0.9rem;
  margin-top: 0;
}
footer a { color: var(--orange-bright); text-decoration: none; }
footer a:hover { color: var(--orange-light); }
footer .footer-links {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
footer .footer-links a { color: #ccc; font-size: 0.85rem; }
footer .footer-heart { color: var(--orange-bright); }

/* ==================== Toast 提示 ==================== */
.toast {
  position: fixed;
  top: 80px;
  right: 20px;
  background: var(--green-ok);
  color: white;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  z-index: 9999;
  animation: slideInRight 0.3s var(--ease-out);
  box-shadow: var(--shadow-3);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: calc(100vw - 40px);
}
.toast.toast-error {
  background: var(--red-err);
}
@keyframes slideInRight {
  from { transform: translateX(120px); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

/* ==================== 空状态 ==================== */
.empty-state {
  text-align: center;
  padding: 50px 20px;
  color: #bbb;
  animation: fadeInUp 0.4s var(--ease-out);
}
.empty-state i { font-size: 2.5rem; display: block; margin-bottom: 12px; }
.empty-state p { font-size: 0.95rem; margin-bottom: 4px; }
.empty-state .sub { font-size: 0.85rem; color: #ccc; }

/* 筛选工具栏统一样式 */
.filter-toolbar {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  margin-bottom: 12px; padding: 10px 14px;
  background: #fafaf7; border-radius: var(--radius-md);
  border: 1px solid #f0e8d0;
}
.filter-toolbar input[type="text"],
.filter-toolbar input[type="date"],
.filter-toolbar select {
  padding: 7px 12px; border: 2px solid #eee; border-radius: 20px;
  font-size: 0.82rem; font-family: inherit; background: white;
  transition: border-color 0.2s;
}
.filter-toolbar input:focus,
.filter-toolbar select:focus {
  border-color: var(--orange-bright); outline: none;
}
.filter-toolbar .btn-sm {
  padding: 5px 14px; font-size: 0.8rem; flex-shrink: 0;
}

/* tab 标签增强 */
.tab-btn {
  transition: all 0.25s var(--ease-out);
  position: relative;
}
.tab-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.tab-btn.active {
  box-shadow: 0 4px 12px rgba(230,81,0,0.15);
}

/* ==================== 辅助类 ==================== */
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* 淡入动画 */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.animate-fade-in {
  animation: fadeInUp 0.5s var(--ease-out) both;
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* 自定义确认弹窗 */
#confirmOverlay button:hover {
  filter: brightness(0.92);
}
#confirmOverlay button:active {
  transform: scale(0.96);
}
#confirmOverlay button:focus-visible {
  outline: 3px solid var(--orange-bright);
  outline-offset: 2px;
}

/* 屏幕阅读器专用 */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

/* ==================== 标签/徽章组件 ==================== */
/* 部门标签芯片 */
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 12px; border-radius: 20px;
  font-size: 0.78rem; font-weight: 600;
  white-space: nowrap; user-select: none;
  transition: all var(--trans-fast);
}
.chip-sm { padding: 2px 10px; font-size: 0.7rem; }
.chip-outline {
  background: transparent; border: 1.5px solid currentColor;
}
.chip-filled { color: #fff; }

/* 状态徽章 */
.badge {
  display: inline-flex; align-items: center; gap: 3px;
  padding: 3px 10px; border-radius: 12px;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.3px;
  text-transform: uppercase; white-space: nowrap;
}
.badge-success { background: #e8f5e9; color: #2e7d32; }
.badge-warning { background: #fff8e1; color: #f57f17; }
.badge-danger  { background: #fce4ec; color: #c62828; }
.badge-info    { background: #e3f2fd; color: #1565c0; }

/* ==================== 骨架屏加载 ==================== */
.skeleton {
  background: linear-gradient(90deg, #f0e8d0 25%, #e8dcc8 50%, #f0e8d0 75%);
  background-size: 200% 100%;
  animation: skeletonShimmer 1.4s ease-in-out infinite;
  border-radius: var(--radius-sm);
}
.skeleton-text   { height: 1em; margin-bottom: 0.5em; }
.skeleton-title  { height: 1.4em; width: 60%; margin-bottom: 0.8em; }
.skeleton-avatar { width: 40px; height: 40px; border-radius: 50%; }
.skeleton-card   { height: 120px; border-radius: var(--radius-md); }
@keyframes skeletonShimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ==================== 旋转加载动画 ==================== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.spinner {
  display: inline-block; width: 1.2em; height: 1.2em;
  border: 2.5px solid rgba(255,140,0,0.2);
  border-top-color: var(--orange-bright);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.spinner-sm { width: 0.9em; height: 0.9em; border-width: 2px; }
.spinner-lg { width: 2em; height: 2em; border-width: 3px; }

/* ==================== 分割线 ==================== */
.divider {
  border: none; border-top: 1px solid #f0e8d0;
  margin: var(--space-md) 0;
}
.divider-sm { margin: var(--space-sm) 0; }
.divider-lg { margin: var(--space-lg) 0; }

/* ==================== 打印样式 ==================== */
@media print {
  nav, footer, .toast, .btn, button, .no-print { display: none !important; }
  body { background: #fff; color: #000; font-size: 12pt; }
  .card { box-shadow: none; border: 1px solid #ddd; break-inside: avoid; }
  .page-header { padding: 20px 0; background: none !important; color: #000; }
  .page-header h1 { color: #000; text-shadow: none; }
  a { color: #000; text-decoration: underline; }
}

/* ==================== 动画无障碍 ==================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ==================== 聚焦环全局增强 ==================== */
:focus-visible {
  outline: 3px solid var(--orange-bright);
  outline-offset: 2px;
}
/* 对原生 outline 已定制过的元素使用更精准的选择器覆盖 */
.btn:focus-visible,
.tab-btn:focus-visible,
.form-input:focus-visible,
input[type="text"]:focus-visible,
input[type="search"]:focus-visible,
input[type="date"]:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--orange-bright);
  outline-offset: 2px;
}

/* ==================== 按钮扩展 ==================== */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 2px solid transparent;
}
.btn-ghost:hover {
  background: var(--orange-bg);
  color: var(--orange-main);
  transform: none;
  box-shadow: none;
}

.btn-icon {
  width: 40px; height: 40px; padding: 0;
  border-radius: 50%; display: inline-flex;
  align-items: center; justify-content: center;
}
@media (max-width: 768px) {
  .btn-icon { width: 44px; height: 44px; }
}

/* ==================== 标签页增强 ==================== */
.tab-bar {
  display: flex; gap: 6px; margin-bottom: 20px;
  flex-wrap: wrap; align-items: center;
}
.tab-btn {
  padding: 10px 22px; border-radius: 24px; cursor: pointer;
  border: 2px solid #e0c8a0; background: white;
  color: var(--text-secondary); font-weight: 500;
  font-size: 0.9rem; transition: all var(--trans-normal);
  font-family: inherit;
}
.tab-btn:hover { border-color: var(--orange-deep); color: var(--orange-deep); }
.tab-btn:focus-visible { outline: 3px solid var(--orange-deep); outline-offset: 2px; }
.tab-btn.active {
  background: var(--orange-deep); color: white;
  border-color: var(--orange-deep);
  box-shadow: 0 4px 12px rgba(230,81,0,0.15);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeInUp 0.35s var(--ease-out); }

/* ==================== 移动端交互优化 ==================== */
@media (hover: none) and (pointer: coarse) {
  /* 消除 300ms 点击延迟 */
  a, button, [role="button"], .tab-btn, .post-action, .tag-chip, .act-card {
    touch-action: manipulation;
  }
  /* 禁止长按弹出菜单（交互元素） */
  button, .btn, .tab-btn, .post-action, .nav-dropdown > a {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
  }
  /* 取消 hover 依赖，改用 active */
  .btn:hover, .tab-btn:hover, .post-action:hover { transform: none; box-shadow: none; }
  .btn:active, .tab-btn:active, .post-action:active { transform: scale(0.96); opacity: 0.85; }
  /* 点击高亮 */
  a:active, button:active { -webkit-tap-highlight-color: rgba(255,140,0,0.15); }
}

/* 全局交互元素优化 */
a, button, .btn, .tab-btn, .post-action, input[type="submit"] {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.1s, opacity 0.1s, background 0.2s;
}
button:active, .btn:active, .tab-btn:active { transform: scale(0.97); }

/* 防止按钮内文字被选中 */
.btn, .tab-btn, button, .post-action { user-select: none; -webkit-user-select: none; }

/* 滚动容器平滑滚动 */
html { scroll-behavior: smooth; }

/* 链接/按钮禁用态 */
button:disabled, .btn:disabled, a.disabled {
  opacity: 0.5; cursor: not-allowed; pointer-events: none;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  /* ---- 基础 ---- */
  html { font-size: 15px; -webkit-text-size-adjust: 100%; }
  body { min-width: 320px; }

  /* ---- 导航 ---- */
  nav { padding: 0 12px; }
  nav .brand { font-size: 1.1rem; }
  nav .links a { padding: 10px 14px; font-size: 0.9rem; min-height: 44px; display: flex; align-items: center; }
  .nav-scroll-hint { display: block; }

  .hamburger { display: block; width: 44px; height: 44px; font-size: 1.3rem; }
  nav .links.mobile-hidden {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(255,255,255,0.98); flex-direction: column;
    padding: 8px 0; box-shadow: var(--shadow-3);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg); z-index: 99;
  }
  nav .links.mobile-open {
    display: flex; position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(255,255,255,0.98); flex-direction: column;
    padding: 8px 0; box-shadow: var(--shadow-3);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg); z-index: 99;
  }
  /* ---- 页面头部 ---- */
  .page-header { padding: 75px 16px 35px; }
  .page-header h1 { font-size: 1.4rem; }
  .page-header p { font-size: 0.85rem; }

  /* ---- 容器 & 卡片 ---- */
  .container { padding: 16px 10px; }
  .card { padding: 18px 14px; border-radius: var(--radius-md); }

  /* ---- 按钮 ---- */
  .btn { padding: 10px 22px; font-size: 0.9rem; min-height: 44px; display: inline-flex; align-items: center; }
  .btn-sm { padding: 6px 14px; font-size: 0.82rem; min-height: 36px; }
  .tab-btn { padding: 8px 16px; font-size: 0.82rem; min-height: 36px; }

  /* ---- 表单 ---- */
  input, textarea, select { font-size: 16px !important; }  /* 防止 iOS 自动缩放 */
  .form-row { flex-direction: column; gap: 10px; }
  .field input, .field textarea, .field select { padding: 10px 14px; font-size: 0.95rem; width: 100%; box-sizing: border-box; }

  /* ---- 筛选工具栏 ---- */
  .filter-toolbar { gap: 8px; padding: 10px 12px; flex-direction: column; align-items: stretch; }
  .filter-toolbar input[type="text"],
  .filter-toolbar input[type="date"],
  .filter-toolbar select { font-size: 0.9rem; padding: 10px 14px; width: 100%; box-sizing: border-box; }
  .filter-toolbar .btn-sm { align-self: flex-start; }

  /* ---- 表格 ---- */
  table { font-size: 0.78rem; }
  th, td { padding: 8px 6px; }

  /* ---- 模态框 ---- */
  .modal-box { padding: 18px 14px; margin: 10px; max-width: calc(100vw - 20px); }

  /* ---- Toast ---- */
  .toast { top: 70px; right: 10px; left: 10px; max-width: none; font-size: 0.85rem; padding: 10px 16px; }

  /* ---- Footer ---- */
  footer { padding: 20px 12px; font-size: 0.82rem; }
  footer .footer-links { gap: 10px; flex-wrap: wrap; justify-content: center; }
}

@media (max-width: 400px) {
  html { font-size: 14px; }
  nav .brand { font-size: 1rem; gap: 4px; }
  nav .brand img { height: 26px; }
  .page-header { padding: 70px 14px 28px; }
  .page-header h1 { font-size: 1.25rem; }
  .container { padding: 12px 8px; }
  .card { padding: 14px 10px; }
  .btn { padding: 8px 18px; font-size: 0.85rem; }
}