/* ========================================
   AI中转站 - 全局样式
   简洁干净风，白底灰调，ChatGPT风格
   ======================================== */

/* ----- CSS变量（浅色模式） ----- */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f7f7f8;
  --bg-tertiary: #ececf1;
  --bg-hover: #e8e8ec;
  --text-primary: #1a1a2e;
  --text-secondary: #6b6b78;
  --text-tertiary: #9e9ea7;
  --border-color: #e5e5e9;
  --accent: #10a37f;
  --accent-hover: #0e8c6e;
  --accent-light: #e6f7f2;
  --danger: #e74c3c;
  --danger-hover: #c0392b;
  --warning: #f39c12;
  --success: #27ae60;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: 0.2s ease;
  --navbar-height: 56px;
  --sidebar-width: 220px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* ----- 深色模式 ----- */
[data-theme="dark"] {
  --bg-primary: #212121;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #383838;
  --bg-hover: #404040;
  --text-primary: #e0e0e0;
  --text-secondary: #a8a8a8;
  --text-tertiary: #7a7a7a;
  --border-color: #404040;
  --accent: #10a37f;
  --accent-hover: #12c493;
  --accent-light: #1a3d33;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
}

/* ----- Reset & Base ----- */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { font-size:16px; scroll-behavior:smooth; }
body {
  font-family: var(--font);
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height:1.6;
  min-height:100vh;
  transition: background var(--transition), color var(--transition);
}
a { color: var(--accent); text-decoration:none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width:100%; height:auto; }
ul, ol { list-style:none; }

/* ----- 导航栏 ----- */
.navbar {
  position: fixed;
  top:0; left:0; right:0;
  height: var(--navbar-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  z-index:1000;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition);
}
.nav-inner {
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
  height:100%;
  display:flex;
  align-items:center;
  gap:24px;
}
.nav-logo {
  font-size:18px;
  font-weight:700;
  color: var(--text-primary) !important;
  white-space:nowrap;
}
.nav-links {
  display:flex;
  gap:4px;
  flex:1;
}
.nav-links a {
  padding:8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size:14px;
  transition: all var(--transition);
}
.nav-links a:hover { background:var(--bg-tertiary); color:var(--text-primary); }
.nav-right {
  display:flex;
  align-items:center;
  gap:8px;
}
.theme-toggle {
  width:36px; height:36px;
  border:none; border-radius:50%;
  background:var(--bg-tertiary);
  color:var(--text-secondary);
  font-size:16px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  transition: all var(--transition);
}
.theme-toggle:hover { background:var(--bg-hover); color:var(--text-primary); }
.nav-admin-btn {
  padding:6px 14px;
  background:var(--accent);
  color:#fff !important;
  border-radius: var(--radius-sm);
  font-size:13px;
  transition: background var(--transition);
}
.nav-admin-btn:hover { background:var(--accent-hover); }
.nav-mobile-btn { display:none; background:none; border:none; font-size:22px; cursor:pointer; color:var(--text-primary); }

/* ----- 主容器 ----- */
.main-container {
  padding-top: var(--navbar-height);
  min-height: calc(100vh - 60px);
}

/* ----- 页面包装 ----- */
.page-wrap {
  max-width:900px;
  margin:0 auto;
  padding:32px 20px;
}
.page-wide {
  max-width:1200px;
  margin:0 auto;
  padding:32px 20px;
}
.page-error {
  text-align:center;
  padding:80px 20px;
}
.page-error h2 { font-size:24px; margin-bottom:12px; }
.page-error p { color:var(--text-secondary); margin-bottom:24px; }

/* ----- 卡片 ----- */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding:24px;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.card-header {
  font-size:16px;
  font-weight:600;
  margin-bottom:16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--border-color);
}

/* ----- 按钮 ----- */
.btn-primary, .btn-secondary, .btn-danger, .btn-sm {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  padding:10px 20px;
  border:none;
  border-radius: var(--radius-sm);
  font-size:14px;
  cursor:pointer;
  transition: all var(--transition);
  font-family: inherit;
}
.btn-primary { background:var(--accent); color:#fff; }
.btn-primary:hover { background:var(--accent-hover); }
.btn-secondary { background:var(--bg-tertiary); color:var(--text-primary); }
.btn-secondary:hover { background:var(--bg-hover); }
.btn-danger { background:var(--danger); color:#fff; }
.btn-danger:hover { background:var(--danger-hover); }
.btn-sm { padding:6px 12px; font-size:13px; }
.btn:disabled { opacity:0.5; cursor:not-allowed; }
.btn-block { width:100%; }

/* ----- 表单 ----- */
.form-group {
  margin-bottom:16px;
}
.form-group label {
  display:block;
  font-size:13px;
  font-weight:500;
  color:var(--text-secondary);
  margin-bottom:6px;
}
.form-input, .form-select, .form-textarea {
  width:100%;
  padding:10px 14px;
  border:1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size:14px;
  font-family: inherit;
  background: var(--bg-primary);
  color: var(--text-primary);
  outline:none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(16,163,127,0.15);
}
.form-textarea { resize:vertical; min-height:80px; }
.form-hint { font-size:12px; color:var(--text-tertiary); margin-top:4px; }
.form-error { font-size:12px; color:var(--danger); margin-top:4px; }

/* ----- 滑动开关 (Toggle Switch) ----- */
.toggle-switch {
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  cursor:pointer;
  user-select:none;
}
.toggle-switch input {
  position:absolute;
  opacity:0;
  width:0; height:0;
}
.toggle-track {
  position:relative;
  width:44px; height:24px;
  background:var(--bg-tertiary);
  border-radius:12px;
  transition: background var(--transition);
  flex-shrink:0;
}
.toggle-track::after {
  content:'';
  position:absolute;
  top:3px; left:3px;
  width:18px; height:18px;
  background:#fff;
  border-radius:50%;
  transition: transform var(--transition);
  box-shadow:0 1px 3px rgba(0,0,0,0.2);
}
.toggle-switch input:checked + .toggle-track {
  background:var(--accent);
}
.toggle-switch input:checked + .toggle-track::after {
  transform:translateX(20px);
}
.toggle-label {
  font-size:13px;
  color:var(--text-secondary);
}

/* ----- 验证码图片 ----- */
.captcha-wrap {
  display:flex;
  gap:10px;
  align-items:center;
}
.captcha-wrap .form-input { flex:1; }
.captcha-img {
  height:42px;
  border-radius: var(--radius-sm);
  cursor:pointer;
  border:1px solid var(--border-color);
}

/* ----- 表格 ----- */
.table-wrap {
  overflow-x:auto;
}
table {
  width:100%;
  border-collapse:collapse;
  font-size:14px;
}
th, td {
  padding:10px 14px;
  text-align:left;
  border-bottom:1px solid var(--border-color);
}
th {
  font-weight:600;
  color:var(--text-secondary);
  font-size:13px;
  background:var(--bg-secondary);
  white-space:nowrap;
}
tr:hover td { background:var(--bg-secondary); }

/* ----- 提示框 ----- */
.alert {
  padding:12px 16px;
  border-radius: var(--radius-sm);
  font-size:14px;
  margin-bottom:16px;
}
.alert-error { background:#fff0f0; color:#d32f2f; border:1px solid #ffcdd2; }
.alert-success { background:#f0fff4; color:#2e7d32; border:1px solid #c8e6c9; }
.alert-info { background:#e3f2fd; color:#1565c0; border:1px solid #bbdefb; }
.alert-warning { background:#fff8e1; color:#f57f17; border:1px solid #ffe082; }

[data-theme="dark"] .alert-error { background:#3d1a1a; color:#ef5350; border-color:#5c2a2a; }
[data-theme="dark"] .alert-success { background:#1a3d2a; color:#66bb6a; border-color:#2a5c3a; }
[data-theme="dark"] .alert-info { background:#1a2a3d; color:#42a5f5; border-color:#2a3a5c; }
[data-theme="dark"] .alert-warning { background:#3d2a1a; color:#ffa726; border-color:#5c3a2a; }

/* ----- 徽章 ----- */
.badge {
  display:inline-block;
  padding:2px 10px;
  border-radius:10px;
  font-size:12px;
  font-weight:500;
}
.badge-green { background:#e6f7e6; color:#1b7a1b; }
.badge-red { background:#f7e6e6; color:#b71c1c; }
.badge-gray { background:var(--bg-tertiary); color:var(--text-tertiary); }
.badge-yellow { background:#fff3e0; color:#e65100; }

[data-theme="dark"] .badge-green { background:#1a3d1a; color:#66bb6a; }
[data-theme="dark"] .badge-red { background:#3d1a1a; color:#ef5350; }
[data-theme="dark"] .badge-yellow { background:#3d2a1a; color:#ffa726; }

/* ----- 模态框 ----- */
.modal-overlay {
  display:none;
  position:fixed;
  top:0; left:0; right:0; bottom:0;
  background:rgba(0,0,0,0.4);
  z-index:2000;
  align-items:center;
  justify-content:center;
  padding:20px;
}
.modal-overlay.show { display:flex; }
.modal-box {
  background:var(--bg-primary);
  border-radius: var(--radius-lg);
  padding:28px;
  max-width:440px;
  width:100%;
  box-shadow: var(--shadow-lg);
  max-height:90vh;
  overflow-y:auto;
}
.modal-title {
  font-size:17px;
  font-weight:600;
  margin-bottom:16px;
}
.modal-actions {
  display:flex;
  gap:10px;
  justify-content:flex-end;
  margin-top:20px;
}

/* ----- 柱形图基础 ----- */
.bar-chart {
  display:flex;
  align-items:flex-end;
  gap:12px;
  padding:16px 0;
  height:180px;
}
.bar-item {
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
}
.bar-fill {
  width:100%;
  max-width:50px;
  border-radius: 4px 4px 0 0;
  transition: height 0.5s ease;
  min-height:4px;
}
.bar-label {
  font-size:11px;
  color:var(--text-tertiary);
  text-align:center;
  white-space:nowrap;
}

/* ----- 后台API管理-售价/成本 ----- */
.price-cell {
  min-width:120px;
}
.price-row {
  display:flex;
  gap:4px;
}
.price-input {
  width:68px !important;
  padding:6px 6px !important;
  font-size:12px !important;
}
.price-input.cost {
  border-color:var(--border-color) !important;
  color:var(--text-tertiary) !important;
}
.price-input::placeholder {
  font-size:10px;
  color:var(--text-tertiary);
}
.bar-value {
  font-size:12px;
  font-weight:600;
  color:var(--text-secondary);
}

/* ----- 页脚 ----- */
.site-footer {
  text-align:center;
  padding:24px 20px;
  color:var(--text-tertiary);
  font-size:13px;
  border-top:1px solid var(--border-color);
  margin-top:40px;
}

/* ----- 消息列表（聊天） ----- */
.msg-container {
  flex:1;
  overflow-y:auto;
  padding:24px 32px;
  display:flex;
  flex-direction:column;
  gap:20px;
  scroll-behavior:smooth;
}
.msg-container::-webkit-scrollbar { width:6px; }
.msg-container::-webkit-scrollbar-track { background:transparent; }
.msg-container::-webkit-scrollbar-thumb { background:var(--border-color); border-radius:3px; }
.msg-container::-webkit-scrollbar-thumb:hover { background:var(--text-tertiary); }
.msg-bubble {
  max-width:78%;
  padding:16px 20px;
  border-radius:18px;
  font-size:14px;
  line-height:1.7;
  position:relative;
  word-wrap:break-word;
  animation: msgIn 0.25s ease-out;
}
@keyframes msgIn {
  from { opacity:0; transform:translateY(8px); }
  to { opacity:1; transform:translateY(0); }
}
.msg-user {
  align-self:flex-end;
  background:var(--accent);
  color:#fff;
  border-bottom-right-radius:4px;
  box-shadow:0 2px 8px rgba(16,163,127,0.15);
}
.msg-assistant {
  align-self:flex-start;
  background:var(--bg-primary);
  color:var(--text-primary);
  border:1px solid var(--border-color);
  border-bottom-left-radius:4px;
  box-shadow:0 1px 4px rgba(0,0,0,0.04);
}
.msg-model-tag {
  font-size:11px;
  padding:2px 10px;
  border-radius:10px;
  background:var(--accent-light);
  color:var(--accent);
  font-weight:500;
  display:inline-block;
  margin-bottom:8px;
  letter-spacing:0.3px;
}

/* ----- 对话历史侧栏 ----- */
.conv-sidebar {
  width:280px;
  background:var(--bg-primary);
  border-right:1px solid var(--border-color);
  display:flex;
  flex-direction:column;
  flex-shrink:0;
  transition: width 0.25s ease, opacity 0.25s ease;
  overflow:hidden;
}
.conv-sidebar.collapsed {
  width:0;
  opacity:0;
  border-right:none;
}
.conv-sidebar-header {
  padding:16px 18px;
  border-bottom:1px solid var(--border-color);
  font-size:14px;
  font-weight:600;
  display:flex;
  align-items:center;
  justify-content:space-between;
  white-space:nowrap;
}
.conv-sidebar-actions {
  display:flex;
  gap:6px;
}
.conv-toggle {
  width:28px;
  border:none;
  background:var(--bg-primary);
  color:var(--text-tertiary);
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  transition: color var(--transition), background var(--transition);
  border-right:1px solid var(--border-color);
}
.conv-toggle:hover {
  background:var(--bg-tertiary);
  color:var(--text-primary);
}
.conv-toggle svg {
  transition: transform 0.25s ease;
}
.conv-toggle:not(.collapsed) svg {
  transform:rotate(180deg);
}
.conv-list {
  flex:1;
  overflow-y:auto;
  padding:6px;
}
.conv-list::-webkit-scrollbar { width:4px; }
.conv-list::-webkit-scrollbar-track { background:transparent; }
.conv-list::-webkit-scrollbar-thumb { background:var(--border-color); border-radius:2px; }
.conv-item {
  padding:10px 12px;
  margin:2px 0;
  border-radius:10px;
  cursor:pointer;
  font-size:13px;
  color:var(--text-secondary);
  transition: all 0.15s ease;
  display:flex;
  align-items:center;
  gap:8px;
}
.conv-item:hover { background:var(--bg-tertiary); color:var(--text-primary); }
.conv-item.active {
  background:var(--accent-light);
  color:var(--accent);
  font-weight:500;
}
.conv-item .conv-title {
  flex:1;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.conv-item .conv-del {
  opacity:0;
  background:none;
  border:none;
  color:var(--text-tertiary);
  cursor:pointer;
  font-size:12px;
  width:22px; height:22px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  transition: all 0.15s ease;
}
.conv-item:hover .conv-del { opacity:0.6; }
.conv-item .conv-del:hover {
  opacity:1;
  color:var(--danger);
  background:rgba(231,76,60,0.1);
}

/* ----- 聊天界面布局 ----- */
.chat-layout {
  display:flex;
  height:calc(100vh - var(--navbar-height));
}
.chat-main {
  flex:1;
  display:flex;
  flex-direction:column;
  max-width:860px;
  margin:0 auto;
  width:100%;
  background:var(--bg-secondary);
}
.chat-input-area {
  padding:0 24px 24px;
  background:transparent;
}
.chat-input-inner {
  max-width:720px;
  margin:0 auto;
}
.chat-model-bar {
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:8px;
  padding:0 4px;
}
.model-dropup {
  position:relative;
  display:inline-block;
}
.model-dropup-trigger {
  display:flex;
  align-items:center;
  gap:6px;
  padding:5px 12px 5px 14px;
  border:1px solid var(--border-color);
  border-radius:14px;
  font-size:12px;
  background:var(--bg-tertiary);
  color:var(--text-primary);
  cursor:pointer;
  transition: border-color var(--transition), background var(--transition);
  user-select:none;
}
.model-dropup-trigger:hover {
  background:var(--bg-hover);
}
.model-dropup-trigger svg {
  transition: transform 0.2s ease;
}
.model-dropup.open .model-dropup-trigger svg {
  transform:rotate(180deg);
}
.model-dropup-list {
  display:none;
  position:absolute;
  bottom:calc(100% + 6px);
  left:0;
  min-width:160px;
  background:var(--bg-primary);
  border:1px solid var(--border-color);
  border-radius:12px;
  padding:4px;
  box-shadow:0 -4px 20px rgba(0,0,0,0.10);
  z-index:100;
  max-height:200px;
  overflow-y:auto;
}
.model-dropup.open .model-dropup-list {
  display:block;
}
.model-dropup-item {
  padding:8px 12px;
  border-radius:8px;
  font-size:13px;
  color:var(--text-secondary);
  cursor:pointer;
  transition: all 0.15s ease;
}
.model-dropup-item:hover {
  background:var(--bg-tertiary);
  color:var(--text-primary);
}
.model-dropup-item.active {
  background:var(--accent-light);
  color:var(--accent);
  font-weight:500;
}
.model-bar-hint {
  font-size:11px;
  color:var(--text-tertiary);
}
.chat-input-box {
  display:flex;
  align-items:flex-end;
  background:var(--bg-primary);
  border:1px solid var(--border-color);
  border-radius:16px;
  padding:8px 8px 8px 16px;
  box-shadow:0 2px 8px rgba(0,0,0,0.06);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.chat-input-box:focus-within {
  border-color:var(--accent);
  box-shadow:0 2px 16px rgba(16,163,127,0.12);
}
.chat-input-box textarea {
  flex:1;
  padding:8px 0;
  border:none;
  font-size:14px;
  font-family:inherit;
  resize:none;
  background:transparent;
  color:var(--text-primary);
  outline:none;
  min-height:24px;
  max-height:120px;
  line-height:1.5;
}
.chat-input-box textarea::placeholder {
  color:var(--text-tertiary);
}
.chat-send-btn {
  width:36px; height:36px;
  border:none;
  border-radius:50%;
  background:var(--accent);
  color:#fff;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  transition: background var(--transition), opacity var(--transition);
  flex-shrink:0;
  opacity:0.8;
}
.chat-send-btn:hover { opacity:1; background:var(--accent-hover); }
.chat-send-btn:disabled { opacity:0.3; cursor:not-allowed; }

/* ----- 聊天顶部信息栏 ----- */
.chat-toolbar {
  padding:16px 24px 12px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  background:transparent;
}
.conv-toggle-mobile {
  display:none;
}
.chat-toolbar .conv-title-input {
  max-width:360px;
  border:1px solid var(--border-color);
  border-radius:20px;
  padding:6px 18px;
  font-size:14px;
  font-weight:600;
  background:var(--bg-tertiary);
  color:var(--text-primary);
  outline:none;
  text-align:center;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.chat-toolbar .conv-title-input:focus {
  border-color:var(--accent);
  box-shadow:0 0 0 2px var(--accent-light);
}
.chat-toolbar .conv-title-input::placeholder { color:var(--text-tertiary); }

/* ----- 加载动画 ----- */
.loading-dots::after {
  content:'';
  animation: dots 1.5s steps(4, end) infinite;
}
@keyframes dots {
  0% { content:''; }
  25% { content:'.'; }
  50% { content:'..'; }
  75% { content:'...'; }
}

/* ----- 复制按钮 ----- */
.copy-btn {
  display:inline-flex;
  align-items:center;
  gap:4px;
  padding:4px 10px;
  border:none;
  border-radius:4px;
  font-size:11px;
  cursor:pointer;
  background:var(--bg-tertiary);
  color:var(--text-tertiary);
  transition: all var(--transition);
}
.copy-btn:hover { background:var(--bg-hover); color:var(--text-primary); }
.copy-btn.copied { background:var(--accent-light); color:var(--accent); }

/* ----- 空状态 ----- */
.empty-state {
  text-align:center;
  padding:48px 20px;
  color:var(--text-tertiary);
}
.empty-state .empty-icon { font-size:48px; margin-bottom:12px; }
.empty-state p { font-size:14px; }

/* ----- Flex/Grid 工具 ----- */
.flex { display:flex; }
.flex-col { flex-direction:column; }
.flex-wrap { flex-wrap:wrap; }
.items-center { align-items:center; }
.justify-between { justify-content:space-between; }
.justify-center { justify-content:center; }
.gap-8 { gap:8px; }
.gap-12 { gap:12px; }
.gap-16 { gap:16px; }
.gap-20 { gap:20px; }
.grid-2 { display:grid; grid-template-columns:repeat(2,1fr); gap:16px; }
.grid-3 { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
.grid-4 { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }
.grid-5 { display:grid; grid-template-columns:repeat(5,1fr); gap:16px; }

/* ----- 统计卡片 ----- */
.stat-card {
  background:var(--bg-primary);
  border:1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding:18px 20px;
  text-align:center;
}
.stat-card .stat-value {
  font-size:24px;
  font-weight:700;
  color:var(--text-primary);
}
.stat-card .stat-label {
  font-size:12px;
  color:var(--text-tertiary);
  margin-top:4px;
}

/* ----- 管理员布局 ----- */
.admin-layout {
  display:flex;
  min-height:100vh;
}
.admin-sidebar {
  width: var(--sidebar-width);
  background:var(--bg-primary);
  border-right:1px solid var(--border-color);
  display:flex;
  flex-direction:column;
  flex-shrink:0;
  position:fixed;
  top:0; left:0;
  bottom:0;
  z-index:100;
  overflow-y:auto;
}
.admin-sidebar .sidebar-header {
  padding:16px 18px;
  font-size:14px;
  font-weight:700;
  color:var(--text-primary);
  border-bottom:1px solid var(--border-color);
}
.admin-sidebar .sidebar-menu {
  flex:1;
  padding:8px;
}
.admin-sidebar .sidebar-menu a {
  display:flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border-radius: var(--radius-sm);
  color:var(--text-secondary);
  font-size:13px;
  transition: all var(--transition);
  margin-bottom:2px;
}
.admin-sidebar .sidebar-menu a:hover { background:var(--bg-tertiary); color:var(--text-primary); }
.admin-sidebar .sidebar-menu a.active { background:var(--accent-light); color:var(--accent); font-weight:500; }
.admin-content {
  margin-left: var(--sidebar-width);
  flex:1;
  padding:28px;
  min-height:100vh;
}
.admin-content h2 {
  font-size:20px;
  font-weight:700;
  margin-bottom:24px;
}
.admin-topbar {
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:24px;
}

/* ----- 响应式（手机端 + 平板） ----- */
@media (max-width: 1024px) {
  .grid-4, .grid-5 { grid-template-columns:repeat(2,1fr); }
  .admin-content { padding:20px; }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns:1fr; }
  .page-wrap, .page-wide { padding:20px 12px; }

  /* 导航 */
  .nav-links {
    display:none;
    position:absolute;
    top:var(--navbar-height);
    left:0; right:0;
    background:var(--bg-primary);
    border-bottom:1px solid var(--border-color);
    flex-direction:column;
    padding:8px;
    box-shadow: var(--shadow-md);
    z-index:999;
  }
  .nav-links.show { display:flex; }
  .nav-mobile-btn { display:block; }
  .nav-links a { padding:12px 14px; font-size:15px; }

  /* 后台 */
  .admin-sidebar { width:60px; }
  .admin-sidebar .sidebar-header span,
  .admin-sidebar .sidebar-menu a span { display:none; }
  .admin-content { margin-left:60px; padding:16px; }

  /* 聊天 - 手机全屏布局（覆盖桌面端样式） */
  .msg-bubble { max-width:95%; padding:14px 16px; }
  .chat-input-inner { max-width:100%; }
  .chat-input-box { padding:6px 6px 6px 12px; border-radius:14px; }
  .chat-input-box textarea { font-size:16px !important; }
  .chat-send-btn { width:40px; height:40px; }
  .model-bar-hint { display:none; }
  .chat-toolbar .conv-title-input { max-width:200px; font-size:13px; }

  /* 侧栏 - 手机端改为左侧抽屉覆盖 */
  .conv-sidebar {
    position:fixed !important;
    top:var(--navbar-height);
    left:0; bottom:0;
    width:280px;
    z-index:1000;
    transform:translateX(-100%);
    transition:transform 0.25s ease;
    box-shadow:var(--shadow-lg);
    border-right:1px solid var(--border-color);
    max-height:none !important;
  }
  .conv-sidebar.open { transform:translateX(0); }
  .conv-sidebar.collapsed {
    width:280px !important;
    max-height:none !important;
    padding:inherit !important;
    border-right:1px solid var(--border-color) !important;
    opacity:1 !important;
    transform:translateX(-100%);
  }
  .conv-sidebar.collapsed.open { transform:translateX(0); }

  /* 抽屉遮罩 */
  .conv-sidebar.open::after {
    content:'';
    position:fixed;
    top:var(--navbar-height);
    left:280px; right:0; bottom:0;
    background:rgba(0,0,0,0.3);
    z-index:-1;
  }

  /* 手机☰按钮 - 独立元素，固定在左上角 */
  .conv-toggle-mobile {
    display:flex;
    position:fixed;
    top:calc(var(--navbar-height) + 8px);
    left:10px;
    width:40px;
    height:40px;
    border-radius:50%;
    background:var(--accent);
    border:none;
    z-index:2000;
    font-size:20px;
    align-items:center;
    justify-content:center;
    box-shadow:0 2px 8px rgba(0,0,0,0.2);
    cursor:pointer;
    color:#fff;
    -webkit-tap-highlight-color:transparent;
  }
  .conv-toggle-mobile:active { transform:scale(0.95); }
  .conv-toggle { display:none; }

  /* 聊天区域占满全屏 */
  .chat-layout {
    display:flex;
    flex-direction:column;
    height:calc(100vh - var(--navbar-height));
  }
  .chat-main {
    flex:1;
    display:flex;
    flex-direction:column;
    max-width:100%;
    margin:0;
    height:100%;
  }
  .msg-container {
    flex:1;
    overflow-y:auto;
    padding:16px 12px;
    -webkit-overflow-scrolling:touch;
  }
  .chat-input-area {
    flex-shrink:0;
    padding:0 12px 12px;
  }
  .chat-toolbar {
    padding:12px 16px 8px 50px;
    flex-shrink:0;
  }

  /* 管理表格 */
  .table-wrap { overflow-x:auto; }
  .table-wrap table { font-size:12px; }
  .table-wrap th, .table-wrap td { padding:8px 6px; white-space:nowrap; }

  /* 卡片间距 */
  .card { padding:16px; }
  .card-header { font-size:14px; }

  /* 个人中心 */
  .profile-grid { grid-template-columns:1fr; }
}

/* UA检测兜底：屏幕宽但确是手机（折叠屏/平板手机） */
.device-mobile .grid-2,
.device-mobile .grid-3,
.device-mobile .grid-4,
.device-mobile .grid-5 { grid-template-columns:1fr; }


.device-mobile .page-wrap,
.device-mobile .page-wide { padding:20px 12px; }
.device-mobile .msg-bubble { max-width:95%; }
.device-mobile .chat-input-box textarea { font-size:16px; }
.device-mobile .model-bar-hint { display:none; }
.device-mobile .profile-grid { grid-template-columns:1fr; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--bg-tertiary); border-radius:3px; }
::-webkit-scrollbar-thumb:hover { background:var(--text-tertiary); }

/* ----- 联系方式块 ----- */
.contact-block {
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:8px;
}
.contact-item {
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 16px;
  border:1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size:13px;
  background:var(--bg-primary);
}

/* ----- 邀请信息块 ----- */
.invite-info {
  background:var(--bg-primary);
  border:1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding:16px 20px;
  margin-top:8px;
}
.invite-info .invite-label { font-size:12px; color:var(--text-tertiary); }
.invite-info .invite-value { font-size:15px; font-weight:600; color:var(--text-primary); margin-top:2px; }

/* ----- 余额显示 ----- */
.balance-display {
  text-align:center;
  padding:28px;
  background:linear-gradient(135deg, var(--accent-light), transparent);
  border-radius: var(--radius-lg);
  margin-bottom:16px;
}
.balance-display .amount {
  font-size:36px;
  font-weight:700;
  color:var(--accent);
}
.balance-display .label {
  font-size:13px;
  color:var(--text-secondary);
  margin-top:4px;
}

/* ----- 条款勾选 ----- */
.terms-check {
  display:flex;
  align-items:flex-start;
  gap:8px;
  font-size:13px;
  color:var(--text-secondary);
  margin-bottom:16px;
}
.terms-check input[type="checkbox"] {
  margin-top:3px;
  width:16px; height:16px;
  cursor:pointer;
}

/* ----- 管理员登录独立页面 ----- */
.admin-login-page {
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:100vh;
  background:var(--bg-secondary);
}