/* ================================================================
   index.css v5.2.0 - 原生框架（基于登录页暖色系风格）
   替代: Bootstrap 3 + Font Awesome + H+ Framework
   ================================================================ */

/* ===== CSS 变量 / 设计令牌 ===== */
:root {
  /* 柔和专业配色（暖米白调，护眼舒适） */
  --color-primary-50: #fef7ed;
  --color-primary-100: #fde8cc;
  --color-primary-200: #fad5a0;
  --color-primary-400: #d97706;
  --color-primary-500: #b45309;
  --color-primary-600: #92400e;
  --color-primary-700: #78350f;

  --color-indigo-50: #fef7ed;
  --color-indigo-100: #fde8cc;
  --color-indigo-200: #fad5a0;
  --color-indigo-400: #d97706;
  --color-indigo-600: #b45309;

  --color-sky-400: #f59e0b;
  --color-sky-600: #d97706;

  --color-white: #fffdf9;
  --color-bg: #faf8f5;
  --color-surface: #ffffff;
  --color-sidebar-bg: rgba(252, 249, 244, 0.98);
  --color-overlay: rgba(20, 10, 5, 0.35);

  --color-text: #3d2e1e;
  --color-text-secondary: #6b5840;
  --color-text-muted: #b09080;
  --color-border: #e8ddd0;
  --color-sidebar-hover-bg: rgba(217, 119, 6, 0.07);
  --color-sidebar-active: var(--color-primary-400);

  /* 布局 */
  --sidebar-width: 240px;
  --topbar-height: 48px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* 字体 */
  --font-sans: 'Noto Sans SC', 'Microsoft YaHei', -apple-system, sans-serif;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
}

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

html {
  height: 100%;
  overflow: hidden;
}

body {
  height: 100%;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--color-indigo-600);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  vertical-align: middle;
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-400);
}

/* ===== 布局容器 ===== */
#appWrapper {
  display: flex;
  height: 100%;
  position: relative;
}

/* ===== 侧边栏 ===== */
#sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-glow);
  backdrop-filter: blur(12px);
}

/* 侧栏头部 */
.sidebar-header {
  padding: 16px 14px 12px;
  border-bottom: 1px solid var(--color-primary-100);
  position: relative;
}

.sidebar-user {
  user-select: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.sidebar-user-line {
  display: flex;
  align-items: center;
  gap: 6px;
}

.user-icon {
  width: 16px;
  height: 16px;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.sidebar-user-line .user-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.sidebar-user-line .dropdown-arrow {
  width: 14px;
  height: 14px;
  color: var(--color-text-muted);
  transition: transform 0.2s;
  flex-shrink: 0;
  cursor: pointer;
  transform: rotate(-90deg);
}
.sidebar-user.open .dropdown-arrow {
  transform: rotate(0deg);
}

.user-avatar-wrap {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--color-border);
  position: relative;
  cursor: pointer;
  transition: border-color 0.2s;
}
.user-avatar-wrap:hover {
  border-color: var(--color-primary-400);
}

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

.user-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.user-role {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* 头像加载动画 */
.avatar-loading {
  opacity: 0.5;
  filter: blur(1px);
}
.avatar-loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid #f3f3f3;
  border-top: 2px solid var(--color-primary-400);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* 侧栏导航 */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 0;
}

.nav-section {
  border-bottom: 1px solid var(--color-primary-50);
}

.nav-toggle {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  gap: 10px;
  user-select: none;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-sans);
}

.nav-toggle:hover {
  background: var(--color-sidebar-hover-bg);
  color: var(--color-primary-400);
}

.nav-toggle .nav-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.nav-toggle .nav-arrow {
  margin-left: auto;
  width: 14px;
  height: 14px;
  transition: transform 0.25s;
  color: var(--color-text-muted);
}

.nav-toggle.open .nav-arrow {
  transform: rotate(90deg);
}

/* 子菜单 */
.nav-sub {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background: var(--color-primary-50);
}

.nav-sub.open {
  max-height: 500px;
}

.nav-sub a,
.nav-sub .nav-toggle {
  display: flex;
  align-items: center;
  padding: 10px 20px 10px 50px;
  color: var(--color-text-secondary);
  font-size: 13px;
  transition: all 0.2s;
  gap: 8px;
}

.nav-sub a:hover {
  color: var(--color-primary-400);
  background: var(--color-sidebar-hover-bg);
}

.nav-sub a.active {
  color: var(--color-primary-600);
  font-weight: 600;
  background: rgba(59, 130, 246, 0.12);
  border-right: 3px solid var(--color-primary-400);
}

/* 三级菜单 */
.nav-sub-sub {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: var(--color-primary-100);
}

.nav-sub-sub.open {
  max-height: 500px;
}

.nav-sub-sub a {
  padding-left: 66px;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-secondary);
  transition: all 0.2s;
}
.nav-sub-sub a:hover {
  color: var(--color-primary-400);
  background: var(--color-sidebar-hover-bg);
}
.nav-sub-sub a.active {
  color: var(--color-primary-600);
  font-weight: 600;
  background: rgba(59, 130, 246, 0.12);
  border-right: 3px solid var(--color-primary-400);
}

/* 徽章（侧栏通知数字） */
.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  background: var(--color-primary-400);
  border-radius: 9px;
  margin-left: auto;
  border: 1.5px solid var(--color-sidebar-bg);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-badge.pulse {
  animation: badge-pulse 1.2s ease-in-out;
}

/* 侧栏底部版权 */
.sidebar-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--color-primary-100);
  font-size: 11px;
  color: var(--color-text-muted);
  text-align: center;
}

/* 页面右下角版权 */
.page-footer {
  position: fixed;
  bottom: 12px;
  right: 16px;
  font-size: 12px;
  color: var(--color-text-muted);
  z-index: 998;
  pointer-events: none;
}

/* ===== 主体内容区 ===== */
#main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: margin-left 0.3s ease;
  min-width: 0;
}

/* ===== 顶栏 ===== */
#topbar {
  display: flex;
  align-items: center;
  height: var(--topbar-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 0 8px;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
  z-index: 100;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 4px;
}

.hamburger-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all 0.2s;
}
.hamburger-btn:hover {
  background: var(--color-sidebar-hover-bg);
  color: var(--color-primary-400);
}
.hamburger-btn svg {
  width: 20px;
  height: 20px;
}

/* ===== 选项卡栏 ===== */
.tab-bar {
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
  height: var(--tab-height);
  margin: 0 8px;
  gap: 2px;
}

.tab-scroll-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  border-radius: 50%;
  cursor: pointer;
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: all 0.2s;
}
.tab-scroll-btn:hover {
  background: var(--color-primary-100);
  color: var(--color-primary-400);
}
.tab-scroll-btn svg {
  width: 14px;
  height: 14px;
}

.tab-container {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.tab-list {
  display: flex;
  gap: 2px;
  transition: margin-left 0.3s ease;
  white-space: nowrap;
}

.tab-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  font-family: var(--font-sans);
}
.tab-item:hover {
  background: var(--color-primary-100);
  color: var(--color-primary-600);
}
.tab-item.active {
  color: var(--color-primary-600);
  font-weight: 600;
  background: var(--color-bg);
  border-bottom: 2px solid var(--color-primary-400);
}

.tab-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 12px;
  color: var(--color-text-muted);
  transition: all 0.15s;
  line-height: 1;
  padding: 0;
}
.tab-close:hover {
  background: var(--color-border);
  color: var(--color-primary-600);
}
.tab-close svg {
  width: 10px;
  height: 10px;
  display: block;
}

/* 顶栏右侧操作 */
.topbar-right {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.topbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all 0.2s;
}
.topbar-btn:hover {
  background: var(--color-sidebar-hover-bg);
  color: var(--color-primary-400);
}
.topbar-btn svg {
  width: 18px;
  height: 18px;
}

/* 侧栏用户下拉菜单 */
.sidebar-user-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 140px;
  z-index: 100;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  display: none !important;
  overflow: hidden;
}
.sidebar-user-dropdown.open {
  display: block !important;
}
.sidebar-user-dropdown a {
  display: block;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
  text-align: center;
  transition: all 0.15s;
}
.sidebar-user-dropdown a:hover {
  background: var(--color-sidebar-hover-bg);
  color: var(--color-primary-400);
}
.sidebar-user-dropdown .dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: 0;
}

/* ===== 内容区域 ===== */
#contentArea {
  flex: 1;
  overflow: hidden;
  position: relative;
  background: var(--color-bg);
  min-height: 0;
}

#contentArea iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: none;
}

#contentArea iframe.active {
  display: block;
}

/* ===== 模态框 ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}
.modal-overlay.open {
  display: flex;
}

.modal-box {
  width: 460px;
  max-width: 92vw;
  max-height: 85vh;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  animation: modalSlideUp 0.3s ease;
  border: 1px solid var(--color-border);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-primary-100);
}
.modal-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}
.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  border-radius: 50%;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all 0.2s;
}
.modal-close:hover {
  background: var(--color-primary-100);
  color: var(--color-primary-600);
}
.modal-close svg {
  width: 16px;
  height: 16px;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--color-primary-100);
}

/* 头像上传模态框 */
.avatar-upload-container {
  text-align: center;
}

.upload-area {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 40px 20px;
  cursor: pointer;
  transition: all 0.3s;
  background: var(--color-primary-50);
}
.upload-area:hover {
  border-color: var(--color-primary-400);
  background: #fffbeb;
}

.upload-placeholder {
  color: var(--color-text-muted);
}
.upload-placeholder p {
  margin: 6px 0;
}

.preview-area {
  margin-top: 16px;
}

.preview-image-container {
  width: 150px;
  height: 150px;
  margin: 0 auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  border: 2px solid var(--color-border);
  background: var(--color-primary-50);
}
.preview-image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.delete-overlay {
  position: absolute;
  inset: 0;
  background: rgba(120, 53, 15, 0.4);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
}
.delete-overlay:hover {
  opacity: 1;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-sans);
  line-height: 1.4;
}
.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-400), var(--color-indigo-400));
  color: #fff;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn-default {
  background: var(--color-white);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.btn-default:hover {
  border-color: var(--color-primary-400);
  background: var(--color-primary-50);
}

.btn-danger {
  background: #ef4444;
  color: #fff;
}
.btn-danger:hover {
  background: #dc2626;
}

.btn-xs {
  padding: 4px 10px;
  font-size: 12px;
}
.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

/* ===== Toast 消息提示 ===== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  min-width: 200px;
  max-width: 360px;
  animation: toastSlideIn 0.3s ease;
  pointer-events: auto;
  font-size: 14px;
  color: var(--color-text);
}

.toast-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.toast-icon.success { color: #22c55e; }
.toast-icon.error { color: #ef4444; }
.toast-icon.info { color: var(--color-primary-400); }
.toast-icon.loading { animation: spin 1s linear infinite; }

.toast-close-btn {
  margin-left: auto;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: 2px;
  display: flex;
}
.toast-close-btn:hover {
  color: var(--color-text);
}
.toast-close-btn svg {
  width: 14px;
  height: 14px;
}

/* 加载 Toast（居中的） */
.toast-loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3000;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 28px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  pointer-events: none;
  animation: fadeIn 0.2s ease;
}

/* ===== 下拉菜单 ===== */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  z-index: 1050;
  display: none;
  min-width: 160px;
  padding: 4px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  animation: fadeIn 0.15s ease;
}
.dropdown-menu.open {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: 8px 14px;
  font-size: 13px;
  color: var(--color-text-secondary);
  border-radius: 4px;
  transition: all 0.15s;
}
.dropdown-menu a:hover {
  background: var(--color-sidebar-hover-bg);
  color: var(--color-primary-600);
}

.dropdown-divider {
  height: 1px;
  margin: 4px 0;
  background: var(--color-primary-100);
}

/* ===== 动画 ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastSlideIn {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes badge-pulse {
  0% { box-shadow: 0 0 0 0 rgba(248, 172, 89, 0.4); transform: scale(1); }
  50% { box-shadow: 0 0 0 6px rgba(248, 172, 89, 0); transform: scale(1.05); }
  100% { box-shadow: 0 0 0 0 rgba(248, 172, 89, 0); transform: scale(1); }
}

/* ===== 移动端遮罩 ===== */
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: 999;
  display: none;
  animation: fadeIn 0.2s ease;
}
.mobile-overlay.open {
  display: block;
}

/* ===== 响应式 ===== */

/* 平板端 */
@media (max-width: 1024px) {
  #sidebar {
    display: none;
    transform: translateX(-100%);
    -webkit-transform: translateX(-100%);
  }
  #sidebar.open {
    display: flex;
    transform: translateX(0);
    -webkit-transform: translateX(0);
  }
  #main-wrapper {
    margin-left: 0;
  }
  .sidebar-header {
    padding: 16px;
  }
}

/* 手机端 */
@media (max-width: 768px) {
  :root {
    --topbar-height: 44px;
    --tab-height: 36px;
  }
  .tab-item {
    padding: 5px 10px;
    font-size: 12px;
  }
  .tab-item .tab-close {
    width: 14px;
    height: 14px;
  }
  .modal-box {
    max-width: 96vw;
    border-radius: var(--radius-md);
  }
  .modal-header {
    padding: 12px 16px;
  }
  .modal-body {
    padding: 16px;
  }
  .sidebar-header {
    padding: 12px;
  }
  .user-avatar-wrap {
    width: 52px;
    height: 52px;
  }
  .nav-toggle {
    padding: 10px 16px;
    font-size: 13px;
  }
  .nav-sub a {
    padding: 8px 16px 8px 42px;
    font-size: 12px;
  }
  .hamburger-btn {
    width: 32px;
    height: 32px;
  }
  .topbar-btn {
    width: 32px;
    height: 32px;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .tab-bar {
    margin: 0 2px;
  }
  .tab-scroll-btn {
    width: 20px;
    height: 20px;
  }
  .tab-scroll-btn svg {
    width: 12px;
    height: 12px;
  }
  .topbar-right .topbar-btn.logout span {
    display: none;
  }
  /* 移动端隐藏底部版权文字 */
  .page-footer {
    display: none;
  }
}

/* ===== PACE 加载条（原生实现） ===== */
body > .pace-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary-400), var(--color-indigo-400));
  z-index: 9999;
  transition: width 0.3s ease;
  border-radius: 0 2px 2px 0;
}