/* ========================================
   theme.css - 黑白灰 · 微信式消息排版
   明暗系统丝滑切换 | 克制低调图标 | 移动/桌面自适应
   ======================================== */

/* ---------- 全局CSS变量 (亮主题·浅灰) ---------- */
:root {
  /* 主色（黑白灰） */
  --primary: #333333;
  --primary-hover: #111111;
  --primary-gradient: linear-gradient(135deg, #4a4a4a 0%, #262626 100%);
  --primary-light: #8a8a8a;
  --primary-dark: #111111;
  --accent: #333333;
  --accent-text: #ffffff;
  --accent-gold: #9a9a9a;

  /* 亮主题 */
  --bg: #f2f2f2;
  --bg-gradient: linear-gradient(135deg, #f7f7f7 0%, #eeeeee 100%);
  --container-bg: rgba(255, 255, 255, 0.92);
  --card-bg: #ffffff;
  --sidebar-bg: #fafafa;
  --chat-bg: #f2f2f2;
  --border-color: rgba(0, 0, 0, 0.10);
  --text-primary: #1c1c1c;
  --text-secondary: #8b8b8b;
  --text-tertiary: #b5b5b5;
  --hover-bg: rgba(0, 0, 0, 0.045);
  --input-bg: rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.10);
  --bubble-received: #ffffff;
  --bubble-sent: #262626;
  --bubble-sent-text: #ffffff;
  --msg-time-color: #9a9a9a;

  /* 通用属性 */
  --backdrop-blur: blur(16px);
  --border-radius-sm: 10px;
  --border-radius-md: 14px;
  --border-radius-lg: 18px;
  --border-radius-xl: 22px;

  /* 动画时长 */
  --transition-fast: 0.2s ease-out;
  --transition-base: 0.3s ease-out;
  --transition-slow: 0.45s ease-out;

  /* 纯色聊天背景（取消彩色网格纹理） */
  --grid-pattern: none;
}

/* ---------- 暗主题·高级深灰（分层黑 + 精致阴影） ---------- */
[data-theme="dark"] {
  --primary: #ececec;
  --primary-hover: #ffffff;
  --primary-gradient: linear-gradient(135deg, #ececec 0%, #c4c4c4 100%);
  --primary-light: #6e6e6e;
  --primary-dark: #e0e0e0;
  --accent: #ececec;
  --accent-text: #111111;
  --accent-gold: #6f6f6f;

  --bg: #0b0b0b;
  --bg-gradient: linear-gradient(135deg, #101010 0%, #0a0a0a 100%);
  --container-bg: rgba(12, 12, 12, 0.96);
  --card-bg: #181818;
  --sidebar-bg: #131313;
  --chat-bg: #0b0b0b;
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #f2f2f2;
  --text-secondary: #9a9a9a;
  --text-tertiary: #5c5c5c;
  --hover-bg: rgba(255, 255, 255, 0.05);
  --input-bg: rgba(255, 255, 255, 0.045);
  --shadow-sm: 0 1px 6px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 18px 44px rgba(0, 0, 0, 0.72);
  --bubble-received: #1f1f1f;
  --bubble-sent: #e9e9e9;
  --bubble-sent-text: #101010;
  --msg-time-color: #5a5a5a;
}

/* 全局平滑过渡 */
*,
*::before,
*::after {
  transition: background-color var(--transition-slow),
              border-color var(--transition-base),
              color var(--transition-base),
              box-shadow var(--transition-base),
              background var(--transition-slow),
              backdrop-filter var(--transition-base);
  box-sizing: border-box;
}

/* ---------- 全局基础 ---------- */
body {
  font-family: 'Inter', -apple-system, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  margin: 0;
  min-height: 90vh;
  position: relative;
  animation: flowBg 20s ease infinite;
  background-size: 200% 200%;
}

@keyframes flowBg {
  0% { background-position: 0% 0%; }
  50% { background-position: 100% 100%; }
  100% { background-position: 0% 0%; }
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-light);
}

/* ---------- 认证容器 & 聊天容器 ---------- */
.auth-container,
.chat-container {
  backdrop-filter: var(--backdrop-blur);
  background: var(--container-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
}

.auth-container {
  max-width: 480px;
  margin: 10vh auto;
  padding: 2rem;
}

.chat-container {
  display: flex;
  flex-direction: column;
  height: 90vh;
  max-width: 1400px;
  margin: 2rem auto;
  overflow: hidden;
}

/* ========== 登录页面专用样式 (修复居中与错位) ========== */
.auth-page {
  text-align: center;
  width: 100%;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.5px;
  margin-bottom: 0.5rem;
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.auth-content {
  max-width: 340px;
  margin: 0 auto;
  width: 100%;
}

.auth-content .form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}

.auth-content .form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.auth-content .form-group input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
}

.auth-content .form-group input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  background: rgba(255, 255, 255, 0.25);
}

.auth-content .btn-primary {
  width: 100%;
  margin-top: 0.5rem;
  padding: 12px 0;
  background: var(--primary-gradient);
  border: none;
  border-radius: 40px;
  font-weight: 600;
  font-size: 1rem;
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-content .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(99, 102, 241, 0.4);
}

.auth-content .btn-primary:active {
  transform: scale(0.97);
}

/* 确保输入框容器不溢出 */
.auth-content .form-group,
.auth-content input,
.auth-content button {
  box-sizing: border-box;
}

/* ---------- 头部区域 ---------- */
.header {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}
.user-profile img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(99, 102, 241, 0.4);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.2);
  transition: transform var(--transition-fast);
}
.user-profile img:hover {
  transform: scale(1.02);
}
.user-profile h1 {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.3px;
  margin: 0;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
#user-status {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.user-actions {
  display: flex;
  gap: 10px;
}
.user-actions button {
  background: rgba(255,255,255,0.1);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(4px);
  border-radius: 40px;
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}
.user-actions button:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99,102,241,0.3);
  border-color: transparent;
}

/* ---------- 消息区域 (网格纹理) ---------- */
.message-area {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  background-image: var(--grid-pattern);
  background-size: 20px 20px;
  scroll-behavior: smooth;
}

/* 消息容器 & 气泡通用 */
.message {
  display: flex;
  margin-bottom: 20px;
  animation: messageSlideIn 0.3s ease-out forwards;
}

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

.message-text {
  max-width: 70%;
  padding: 12px 18px;
  font-size: 0.95rem;
  line-height: 1.45;
  word-wrap: break-word;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

/* 发送消息 (右侧) */
.message.sent {
  justify-content: flex-end;
}
.message.sent .message-text {
  background: var(--primary-gradient);
  color: white;
  border-radius: var(--border-radius-md) var(--border-radius-md) 5px var(--border-radius-md);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.2), var(--shadow-sm);
}

/* 接收消息 (左侧) */
.message.received {
  justify-content: flex-start;
}
.message.received .message-text {
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--border-radius-md) var(--border-radius-md) var(--border-radius-md) 5px;
}

/* 消息悬停效果 */
.message-text:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.message-info {
  display: flex;
  gap: 10px;
  font-size: 0.7rem;
  margin-top: 5px;
  padding: 0 6px;
  color: var(--text-secondary);
}
.message.sent .message-info {
  justify-content: flex-end;
}

/* 系统消息 */
.message.system {
  justify-content: center;
}
.message.system .message-text {
  background: rgba(0,0,0,0.05);
  backdrop-filter: blur(4px);
  border-radius: 30px;
  font-size: 0.8rem;
  padding: 6px 16px;
  text-align: center;
  max-width: 80%;
  color: var(--text-secondary);
}

/* ---------- 输入区域 ---------- */
.input-area {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--border-color);
  padding: 16px 24px;
  display: flex;
  gap: 12px;
  align-items: center;
}

#msgInput {
  flex: 1;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
  border: 1px solid var(--border-color);
  border-radius: 40px;
  padding: 12px 20px;
  font-size: 0.95rem;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
}
#msgInput:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  background: rgba(255, 255, 255, 0.3);
}

#sendButton {
  background: var(--primary-gradient);
  border: none;
  border-radius: 40px;
  padding: 10px 24px;
  font-weight: 600;
  color: white;
  display: flex;
  gap: 8px;
  align-items: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
#sendButton:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(99,102,241,0.4);
}
#sendButton:active {
  transform: scale(0.95);
}

/* ---------- 状态栏 ---------- */
.status-bar {
  display: flex;
  justify-content: space-between;
  padding: 8px 24px;
  font-size: 0.75rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  background: rgba(0,0,0,0.02);
}

/* ---------- 模式选择器 (右下角浮动) ---------- */
.mode-selector {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border-radius: 48px;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  transition: all var(--transition-base);
}
.mode-selector span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
}
.mode-buttons {
  display: flex;
  gap: 8px;
}
.mode-btn {
  background: transparent;
  border: none;
  padding: 6px 14px;
  border-radius: 32px;
  font-size: 0.75rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  backdrop-filter: blur(2px);
}
.mode-btn.active {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.mode-btn:hover:not(.active) {
  background: rgba(99, 102, 241, 0.2);
  transform: translateY(-1px);
}

/* ---------- 主题切换器 (右上角) ---------- */
.theme-selector {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border-radius: 48px;
  padding: 6px 12px;
  display: flex;
  gap: 6px;
  border: 1px solid var(--border-color);
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.theme-btn {
  background: transparent;
  border: none;
  padding: 6px 12px;
  border-radius: 32px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.theme-btn.active {
  background: var(--primary-gradient);
  color: white;
}
.theme-icon {
  font-size: 0.8rem;
}

/* ---------- 模态框玻璃重设计 ---------- */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-content {
  background: var(--container-bg);
  backdrop-filter: blur(24px);
  border-radius: var(--border-radius-lg);
  max-width: 480px;
  width: 90%;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  animation: modalPop 0.25s ease-out;
}
@keyframes modalPop {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}
.modal-header {
  display: flex;
  justify-content: space-between;
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}
.modal-header h2 {
  font-size: 1.4rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.close-btn {
  background: transparent;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.close-btn:hover {
  color: #ef4444;
  transform: rotate(90deg);
}
.modal-body {
  padding: 1.5rem;
}
.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  font-size: 0.8rem;
  margin-bottom: 6px;
  color: var(--text-secondary);
}
.form-group input {
  width: 100%;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  box-sizing: border-box;
}
.form-group input:focus {
  border-color: var(--primary-light);
  outline: none;
  box-shadow: 0 0 0 2px rgba(99,102,241,0.2);
}
.btn-primary {
  background: var(--primary-gradient);
  border: none;
  padding: 10px 0;
  width: 100%;
  border-radius: 40px;
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: 8px;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(99,102,241,0.4);
}
.btn-danger {
  background: rgba(239, 68, 68, 0.9);
  border: none;
  padding: 10px 0;
  width: 100%;
  border-radius: 40px;
  font-weight: 500;
  color: white;
  cursor: pointer;
  margin-top: 12px;
  transition: all var(--transition-fast);
}
.btn-danger:hover {
  background: #ef4444;
  transform: translateY(-1px);
}
.warning-box {
  background: rgba(245, 158, 11, 0.1);
  border-left: 3px solid #f59e0b;
  padding: 12px;
  border-radius: 12px;
  margin-bottom: 20px;
}
.avatar-upload {
  text-align: center;
  margin-bottom: 20px;
}
.avatar-upload img {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 3px solid var(--primary-light);
  margin-bottom: 12px;
  object-fit: cover;
}
.password-container {
  display: flex;
  gap: 8px;
}
.toggle-password {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 40px;
  padding: 0 12px;
  cursor: pointer;
}

/* ---------- 额外按钮&加载动画 ---------- */
.loader {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-color);
  border-top: 2px solid var(--primary-light);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 三个跳动的点 (用于加载指示) */
.typing-dots {
  display: flex;
  gap: 6px;
  align-items: center;
}
.typing-dots span {
  width: 6px;
  height: 6px;
  background: var(--primary-light);
  border-radius: 50%;
  animation: dotPulse 1.2s infinite ease-in-out;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dotPulse {
  0%, 60%, 100% { transform: scale(0.6); opacity: 0.4; }
  30% { transform: scale(1.2); opacity: 1; }
}

/* ---------- 移动端适配 ---------- */
@media (max-width: 768px) {
  .chat-container {
    margin: 0;
    height: 100vh;
    border-radius: 0;
  }
  .message-text {
    max-width: 85%;
  }
  .mode-selector, .theme-selector {
    transform: scale(0.85);
    transform-origin: bottom right;
  }
  .mode-selector {
    bottom: 80px;
  }
  .input-area {
    padding: 12px;
  }
  #sendButton {
    padding: 8px 16px;
  }
  .auth-container {
    margin: 5vh auto;
    width: 90%;
    padding: 1.5rem;
  }
  .auth-content {
    max-width: 100%;
  }
}

/* ========= 统一设置面板（拟态玻璃风格） ========= */
.settings-modal-content {
    max-width: 450px;
    width: 90%;
}

.settings-body {
    padding: 1.5rem;
}

.settings-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}
.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.settings-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.settings-title i {
    color: var(--primary-light);
}

.settings-options {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.settings-option-btn {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    border: 1px solid var(--border-color);
    border-radius: 40px;
    padding: 8px 20px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.settings-option-btn i {
    font-size: 0.9rem;
}

.settings-option-btn.active {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}

.settings-option-btn:hover:not(.active) {
    background: rgba(99, 102, 241, 0.2);
    transform: translateY(-1px);
}

.settings-hint {
    margin-top: 12px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-align: center;
}

#current-mode-display {
    font-weight: 600;
    color: var(--primary-light);
}

/* 调整原有模态框关闭按钮不影响新面板 */
.modal .close-btn {
    background: transparent;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

/* 强制修正：明亮主题下，所有设置面板按钮（非激活状态）的文字为深色，背景半透明深色 */
:root .settings-option-btn:not(.active),
[data-theme="light"] .settings-option-btn:not(.active) {
    background: rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.25);
    color: #1e293b ;   /* 深灰文字，清晰可见 */
}

/* 暗色主题下，非激活按钮文字为浅色，背景半透白 */
[data-theme="dark"] .settings-option-btn:not(.active) {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #e2e8f0;
}

/* 激活按钮保持渐变背景和白字（不受影响） */
.settings-option-btn.active {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
}

/* 悬停效果统一 */
.settings-option-btn:hover:not(.active) {
    background: var(--primary-light);
    color: white ;
    border-color: transparent ;
}

/* 动态生成的spinner容器 */
.dynamic-spinner {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 8px;
}

/* 加载遮罩（覆盖整个聊天区域） */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
    border-radius: var(--border-radius-md);
    color: white;
    font-size: 0.9rem;
    gap: 12px;
}

.loading-overlay .loader {
    width: 40px;
    height: 40px;
    border-width: 3px;
}

/* 按钮禁用样式 */
button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* ========== 布局修复：侧边栏 + 主区域 ========== */
.chat-container {
    display: flex;
    flex-direction: row;
    height: 90vh;
    max-width: 1400px;
    margin: 2rem auto;
    overflow: hidden;
    padding: 0;
}

.sidebar {
    width: 280px;
    min-width: 200px;
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.contacts-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem 0;
}

.contact-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background var(--transition-fast);
    gap: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}
.contact-item:hover {
    background: rgba(99, 102, 241, 0.1);
}
.contact-item.active {
    background: rgba(99, 102, 241, 0.15);
}
.contact-avatar {
    font-size: 1.5rem;
}
.contact-name {
    flex: 1;
}
.contact-badge {
    font-size: 0.7rem;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    background: var(--primary-light);
    color: white;
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.chat-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--card-bg);
    backdrop-filter: blur(4px);
}
.chat-header h2 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 600;
}
.chat-header .subheader {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-left: 0.5rem;
}

/* 消息区域占满剩余空间 */
.message-area {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
    background-image: var(--grid-pattern);
    background-size: 20px 20px;
    scroll-behavior: smooth;
    position: relative;
}

/* 输入区域调整 */
.input-area {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    background: var(--card-bg);
    backdrop-filter: blur(4px);
}

.input-area #msgInput {
    flex: 1;
}

.input-area #sendButton {
    flex-shrink: 0;
}

/* 状态栏 */
.status-bar {
    display: flex;
    justify-content: space-between;
    padding: 8px 24px;
    font-size: 0.75rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    background: rgba(0,0,0,0.02);
}

/* ========== 侧边栏收缩功能 ========== */
.sidebar {
    transition: width 0.3s ease, min-width 0.3s ease, opacity 0.3s ease;
    overflow: hidden;
    position: relative;
}

.sidebar.collapsed {
    width: 0 !important;
    min-width: 0 !important;
    opacity: 0;
    border-right: none;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

/* ===== 侧边栏收起按钮（展开时显示） ===== */
.collapse-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    flex-shrink: 0;
}
.collapse-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-light);
    color: var(--primary-light);
    transform: scale(1.05);
}
.collapse-btn:active {
    transform: scale(0.95);
}

/* ===== 展开按钮（侧边栏收起时显示） ===== */
.expand-btn {
    position: fixed;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--card-bg);
    backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    font-size: 1.1rem;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transition: all 0.2s ease;
    color: var(--text-primary);
}
.expand-btn:hover {
    background: var(--primary-light);
    color: white;
    border-color: transparent;
    transform: translateY(-50%) scale(1.08);
}
.expand-btn:active {
    transform: translateY(-50%) scale(0.95);
}
.sidebar.collapsed ~ .expand-btn {
    display: flex;
}
.chat-container {
    display: flex; 
    flex-direction: row; 
    position: relative;
    padding: 0;
}

/* ========================================
   移动端适配（聊天界面）
   ======================================== */
@media (max-width: 768px) {
    /* 聊天容器占满屏幕 */
    .chat-container {
        margin: 0 !important;
        border-radius: 0 !important;
        height: 100vh !important;
        max-height: 100vh !important;
        width: 100%;
        max-width: 100%;
        flex-direction: column !important;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 10;
    }

    /* 侧边栏改为全屏遮罩 */
    .sidebar {
        position: fixed !important;
        top: 0;
        left: 0;
        width: 280px !important;
        height: 100vh !important;
        z-index: 200 !important;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.2, 0.9, 0.4, 1);
        border-radius: 0 !important;
        box-shadow: 0 0 40px rgba(0,0,0,0.3);
    }
    .sidebar.active {
        transform: translateX(0);
    }
    .sidebar.collapsed {
        transform: translateX(-100%) !important;
        width: 280px !important;
        min-width: 280px !important;
        opacity: 1 !important;
    }

    /* 展开按钮在移动端始终显示（如果侧边栏收起） */
    .expand-btn {
        left: 8px;
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    /* 移动端遮罩 */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 150;
        display: none;
        opacity: 0;
        transition: opacity 0.3s ease;
    }
    .sidebar-overlay.active {
        opacity: 1;
    }

    /* 主区域占满 */
    .main {
        width: 100%;
        height: 100%;
    }

    /* 消息气泡宽度 */
    .message-text {
        max-width: 85%;
        font-size: 0.9rem;
    }

    /* 输入区域 */
    .input-area {
        padding: 10px 12px;
        gap: 8px;
        flex-wrap: nowrap;
    }
    #msgInput {
        font-size: 0.9rem;
        padding: 10px 16px;
    }
    #sendButton {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    /* 头部 */
    .header {
        padding: 10px 12px;
        flex-shrink: 0;
    }
    .user-profile h1 {
        font-size: 1rem;
    }
    .user-profile img {
        width: 32px;
        height: 32px;
    }
    .user-actions button {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }

    /* 状态栏 */
    .status-bar {
        padding: 4px 12px;
        font-size: 0.65rem;
    }
}

/* ========================================
   Markdown 渲染样式
   ======================================== */
.markdown-body {
    font-size: 0.95rem;
    line-height: 1.6;
    word-wrap: break-word;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
    margin: 8px 0 6px 0;
    font-weight: 600;
}

.markdown-body h1 { font-size: 1.4rem; }
.markdown-body h2 { font-size: 1.2rem; }
.markdown-body h3 { font-size: 1.1rem; }
.markdown-body h4 { font-size: 1rem; }

.markdown-body p {
    margin: 4px 0;
}

.markdown-body ul,
.markdown-body ol {
    padding-left: 20px;
    margin: 4px 0;
}

.markdown-body li {
    margin: 2px 0;
}

.markdown-body code {
    background: rgba(0, 0, 0, 0.06);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.85em;
}

.markdown-body pre {
    background: rgba(0, 0, 0, 0.06);
    padding: 10px 14px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 6px 0;
}

.markdown-body pre code {
    background: transparent;
    padding: 0;
    font-size: 0.85em;
}

.markdown-body blockquote {
    border-left: 3px solid var(--primary-light);
    padding-left: 12px;
    margin: 6px 0;
    color: var(--text-secondary);
}

.markdown-body a {
    color: var(--primary-light);
    text-decoration: none;
}

.markdown-body a:hover {
    text-decoration: underline;
}

.markdown-body table {
    border-collapse: collapse;
    width: 100%;
    margin: 6px 0;
    font-size: 0.9rem;
}

.markdown-body table th,
.markdown-body table td {
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    text-align: left;
}

.markdown-body table th {
    background: rgba(99, 102, 241, 0.08);
    font-weight: 600;
}

/* 暗色主题适配 */
[data-theme="dark"] .markdown-body code {
    background: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .markdown-body pre {
    background: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .markdown-body table th {
    background: rgba(99, 102, 241, 0.15);
}

/* ========== AI 消息操作（继续 / 编辑） ========== */
.ai-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
}
.ai-action-btn {
    padding: 4px 12px;
    font-size: 0.78rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: rgba(99, 102, 241, 0.06);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.ai-action-btn:hover {
    background: var(--primary-gradient);
    color: #fff;
    border-color: transparent;
}
.ai-action-primary {
    background: var(--primary-gradient);
    color: #fff;
    border-color: transparent;
}
.ai-truncated-hint {
    margin-top: 10px;
    font-size: 0.75rem;
    color: #d97706;
    background: rgba(217, 119, 6, 0.08);
    border-radius: 8px;
    padding: 6px 10px;
}
.ai-edit-input {
    width: 100%;
    min-height: 90px;
    padding: 10px 12px;
    margin-top: 8px;
    box-sizing: border-box;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    line-height: 1.6;
    outline: none;
    resize: vertical;
}
.ai-edit-input:focus {
    border-color: rgba(99, 102, 241, 0.6);
}
.ai-edit-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

/* ============================================================
   新版：黑白灰 · 微信式消息排版（覆盖旧玻璃科技风）
   ============================================================ */

/* ---------- 字体排版（重点） ---------- */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
        'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    letter-spacing: 0.2px;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* ---------- 明暗切换丝滑过渡 ---------- */
html.theme-transition,
html.theme-transition *,
html.theme-transition *::before,
html.theme-transition *::after {
    transition: background-color 0.4s ease, color 0.4s ease,
        border-color 0.4s ease, fill 0.4s ease, box-shadow 0.4s ease !important;
}

/* ---------- 容器：全屏微信式 ---------- */
.auth-container,
.chat-container {
    backdrop-filter: none;
    background: var(--bg-gradient);
    border: none;
    border-radius: 0;
    box-shadow: none;
}

/* ---------- 顶部栏 ---------- */
.header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0.85rem 1.4rem;
}
.user-profile h1 {
    background: none;
    -webkit-background-clip: initial;
    background-clip: initial;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
}
#user-status {
    color: var(--text-secondary);
}
.user-actions button {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
}
.user-actions button:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}
.user-profile img {
    border: 1px solid var(--border-color);
    box-shadow: none;
}

/* ---------- 聊天头部（联系人名） ---------- */
.chat-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0.7rem 1.4rem;
}
.chat-header h2 {
    font-size: 1.05rem;
    font-weight: 600;
}
.chat-header .subheader {
    color: var(--text-secondary);
}

/* ---------- 消息区域：纯色微信背景 ---------- */
.message-area {
    background: var(--chat-bg);
    background-image: none;
    padding: 12px 14px;
}

/* ========== 微信式消息排版 ========== */
.message {
    display: block;
    margin-bottom: 2px;
    animation: msgIn 0.22s ease-out;
}
@keyframes msgIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* 时间标签：居中显示在气泡上方（格式 XXXX年XX月XX日 XX:XX） */
.msg-time-label {
    text-align: center;
    font-size: 0.72rem;
    color: var(--msg-time-color);
    width: fit-content;
    max-width: 92%;
    margin: 14px auto;
    padding: 2px 10px;
    user-select: none;
    word-break: keep-all;
}

/* 一行：头像 + 气泡 */
.msg-row {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 2px 0;
}
.message.sent .msg-row {
    flex-direction: row-reverse;
}

/* 头像（微信圆角方块） */
.msg-avatar {
    width: 38px;
    height: 38px;
    border-radius: 6px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--hover-bg);
    color: var(--text-secondary);
    font-size: 1.05rem;
    overflow: hidden;
}
.msg-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.message.sent .msg-avatar {
    background: var(--bubble-sent);
    color: var(--bubble-sent-text);
}

/* 气泡 */
.msg-bubble {
    max-width: 68%;
    padding: 9px 13px;
    font-size: 0.95rem;
    line-height: 1.6;
    word-wrap: break-word;
    position: relative;
}
.message.received .msg-bubble {
    background: var(--bubble-received);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    border-top-left-radius: 4px;
}
.message.sent .msg-bubble {
    background: var(--bubble-sent);
    color: var(--bubble-sent-text);
    border-radius: 12px;
    border-top-right-radius: 4px;
}

/* 气泡内文本（覆盖旧样式） */
.message-text {
    max-width: none;
    padding: 0;
    box-shadow: none;
    background: none;
    border: none;
    color: inherit;
}
.message-text:hover {
    transform: none;
    box-shadow: none;
}
.message.sent .message-text,
.message.received .message-text {
    background: none;
    border: none;
    box-shadow: none;
    color: inherit;
}

/* 系统消息：居中灰色小胶囊 */
.message.system {
    display: flex;
    justify-content: center;
}
.message.system .message-text {
    background: var(--hover-bg);
    border: none;
    border-radius: 8px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    padding: 4px 10px;
    max-width: 80%;
}

/* AI 流式指示：低调呼吸点 */
.streaming-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-top: 6px;
    font-size: 0.72rem;
    color: var(--text-secondary);
}
.streaming-badge::before {
    content: '';
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-secondary);
    animation: pulse 1.1s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 0.3; }
    50%      { opacity: 1; }
}

/* AI 操作按钮（继续/编辑）：低调灰 */
.ai-actions {
    margin-left: 46px;
    margin-top: 6px;
}
.ai-action-btn {
    background: var(--hover-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    font-size: 0.75rem;
    padding: 3px 12px;
}
.ai-action-btn:hover {
    background: var(--text-primary);
    color: var(--card-bg);
    border-color: var(--text-primary);
}
.ai-action-primary {
    background: var(--text-primary);
    color: var(--card-bg);
    border-color: var(--text-primary);
}
.ai-action-primary:hover {
    background: var(--primary-hover);
    color: var(--card-bg);
}
.ai-truncated-hint {
    margin-left: 46px;
    background: var(--hover-bg);
    color: var(--text-secondary);
}
.ai-edit-input {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

/* Markdown 排版（微信风格、克制动线） */
.markdown-body p {
    margin: 0 0 8px;
}
.markdown-body p:last-child {
    margin-bottom: 0;
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
    font-size: 1em;
    font-weight: 600;
    margin: 10px 0 6px;
}
.markdown-body code {
    background: var(--hover-bg);
    padding: 1px 6px;
    border-radius: 5px;
    font-size: 0.85em;
}
.markdown-body pre {
    background: var(--input-bg);
    padding: 10px 12px;
    border-radius: 10px;
    overflow-x: auto;
    margin: 8px 0;
}
.markdown-body blockquote {
    border-left: 3px solid var(--border-color);
    margin: 6px 0;
    padding-left: 10px;
    color: var(--text-secondary);
}
.markdown-body a {
    color: var(--text-secondary);
    text-decoration: underline;
}
.markdown-body img {
    max-width: 100%;
    border-radius: 8px;
}
.markdown-body ul,
.markdown-body ol {
    margin: 6px 0;
    padding-left: 20px;
}
[data-theme="dark"] .markdown-body code,
[data-theme="dark"] .markdown-body pre {
    background: rgba(255, 255, 255, 0.06);
}

/* ---------- 侧边栏（联系人） ---------- */
.sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
}
.sidebar-header {
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}
.contact-item {
    border-radius: 8px;
    margin: 2px 8px;
    padding: 10px 12px;
    color: var(--text-primary);
}
.contact-item:hover {
    background: var(--hover-bg);
}
.contact-item.active {
    background: var(--hover-bg);
}
.contact-avatar {
    background: none;
    color: var(--text-secondary);
    font-size: 1rem;
}
.contact-name {
    font-weight: 500;
}
.contact-badge {
    background: var(--hover-bg);
    color: var(--text-secondary);
    border-radius: 4px;
    font-size: 0.68rem;
    padding: 1px 6px;
}

/* ---------- 输入区 ---------- */
.input-area {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 10px 14px;
}
#msgInput {
    background: var(--input-bg);
    border: 1px solid transparent;
    border-radius: 22px;
    color: var(--text-primary);
    padding: 9px 16px;
}
#msgInput:focus {
    border-color: var(--border-color);
}
#sendButton {
    border-radius: 22px;
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    padding: 9px 20px;
}
#sendButton:hover {
    background: var(--primary-hover);
}
[data-theme="dark"] #sendButton {
    color: #111;
}

/* ---------- 按钮（黑白灰） ---------- */
.btn-primary {
    background: var(--primary-gradient);
    color: var(--accent-text);
    border: none;
    border-radius: 10px;
}
.btn-primary:hover {
    background: var(--primary-hover);
    color: var(--accent-text);
}
.btn-secondary {
    background: var(--hover-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}
.btn-danger {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}
.btn-danger:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

/* ---------- 模态框 ---------- */
.modal {
    background: rgba(0, 0, 0, 0.45);
}
.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
}
.modal-header {
    border-bottom: 1px solid var(--border-color);
}
.modal-header h2 {
    color: var(--text-primary);
}
.close-btn {
    color: var(--text-secondary);
}
.close-btn:hover {
    color: var(--text-primary);
}

/* ---------- 状态栏 / 设置 ---------- */
.status-bar {
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}
.settings-option-btn {
    background: var(--hover-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}
.settings-option-btn.active {
    background: var(--text-primary);
    color: var(--card-bg);
    border-color: var(--text-primary);
}

/* ---------- Toast（低调中性） ---------- */
.toast {
    background: rgba(30, 30, 30, 0.92);
    color: #f2f2f2;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
}
[data-theme="dark"] .toast {
    background: rgba(240, 240, 240, 0.94);
    color: #141414;
}

/* ---------- 加载动画 / 滚动条 ---------- */
.loader {
    border-color: var(--border-color);
    border-top-color: var(--text-secondary);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* ---------- 管理后台（角色表） ---------- */
.badge-ai,
.badge-user {
    background: var(--hover-bg);
    color: var(--text-secondary);
    border-radius: 5px;
    padding: 2px 8px;
    font-size: 0.75rem;
}
.admin-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}
.table-container table {
    border-collapse: collapse;
}
.table-container th,
.table-container td {
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}
.action-btn {
    background: var(--hover-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}
.action-btn:hover {
    background: var(--text-primary);
    color: var(--card-bg);
}

/* ---------- 移动端适配 ---------- */
@media (max-width: 768px) {
    .header {
        padding: 0.7rem 1rem;
    }
    .user-profile img {
        width: 36px;
        height: 36px;
    }
    .user-profile h1 {
        font-size: 1rem;
    }
    .chat-header {
        padding: 0.6rem 1rem;
    }
    .message-area {
        padding: 10px 8px;
    }
    .msg-avatar {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }
    .msg-bubble {
        max-width: 76%;
        font-size: 0.9rem;
        padding: 8px 11px;
    }
    .ai-actions,
    .ai-truncated-hint {
        margin-left: 40px;
    }
    .input-area {
        padding: 8px 10px;
    }
    #msgInput {
        padding: 8px 14px;
    }
}

/* 桌面端：更宽松的阅读宽度 */
@media (min-width: 1200px) {
    .msg-bubble {
        max-width: 62%;
    }
}

/* ============================================================
   修复段：编辑框 / 设置按钮对比度 / 暗色高级感 / 移动端
   ============================================================ */

/* ---------- 编辑框（放大 + 防止文字溢出气泡） ---------- */
.message.editing .msg-bubble {
    max-width: 92%;
    width: 100%;
}
.ai-edit-input {
    min-width: 220px;
    width: 100%;
    min-height: 96px;
    box-sizing: border-box;
    font-size: 0.92rem;
    line-height: 1.6;
    border-radius: 10px;
}
.ai-edit-actions {
    justify-content: flex-end;
    width: 100%;
}
.msg-bubble {
    min-width: 0;
}
.message-text {
    overflow-wrap: anywhere;
    word-break: break-word;
}

/* ---------- 设置按钮：亮/暗主题都清晰有层次（覆盖旧 !important 规则） ---------- */
:root .settings-option-btn:not(.active),
[data-theme="light"] .settings-option-btn:not(.active) {
    background: var(--card-bg) !important;
    border: 1px solid rgba(0, 0, 0, 0.18) !important;
    color: var(--text-primary) !important;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}
[data-theme="dark"] .settings-option-btn:not(.active) {
    background: var(--card-bg) !important;
    border: 1px solid rgba(255, 255, 255, 0.14) !important;
    color: var(--text-primary) !important;
}
.settings-option-btn.active {
    background: var(--text-primary) !important;
    color: var(--card-bg) !important;
    border-color: var(--text-primary) !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18) !important;
    font-weight: 600;
}
.settings-option-btn:hover:not(.active) {
    background: var(--hover-bg) !important;
    border-color: var(--text-secondary) !important;
    color: var(--text-primary) !important;
    transform: translateY(-1px);
}

/* ---------- 暗色高级感微调 ---------- */
[data-theme="dark"] .message.received .msg-bubble {
    border-color: rgba(255, 255, 255, 0.06);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}
[data-theme="dark"] .message.sent .msg-bubble {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.55);
}
[data-theme="dark"] .msg-avatar {
    background: rgba(255, 255, 255, 0.06);
}
[data-theme="dark"] .sidebar {
    box-shadow: inset -1px 0 0 var(--border-color);
}
[data-theme="dark"] .modal-content,
[data-theme="dark"] .card {
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* ---------- 容器高度：动态视口（解决移动端输入区被浏览器栏遮挡） ---------- */
.chat-container,
.auth-container {
    height: 100vh;
    height: 100dvh;
    max-height: 100vh;
    max-height: 100dvh;
}
@media (min-width: 769px) {
    .chat-container {
        height: 92vh;
        height: 92dvh;
        margin: 1.5rem auto;
    }
}

/* ---------- 输入区：确保发送按钮与输入框完整显示 ---------- */
.input-area {
    flex-shrink: 0;
    width: 100%;
    box-sizing: border-box;
    gap: 8px;
}
#msgInput {
    flex: 1 1 auto;
    min-width: 0;
}
#sendButton {
    flex: 0 0 auto;
    white-space: nowrap;
}

/* ---------- 移动端：联系人抽屉 + 汉堡按钮 ---------- */
.mobile-menu-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.9rem;
    margin-right: 8px;
    flex-shrink: 0;
}
.mobile-menu-btn:hover {
    background: var(--hover-bg);
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: inline-flex;
    }
    .chat-header .subheader {
        display: none;
    }
    .chat-container {
        height: 100vh !important;
        height: 100dvh !important;
        max-height: 100vh !important;
        max-height: 100dvh !important;
    }
    /* 侧栏抽屉：默认收起，active 展开 */
    .sidebar {
        width: min(78vw, 300px) !important;
        min-width: 0 !important;
    }
    .sidebar.active {
        transform: translateX(0) !important;
        box-shadow: 12px 0 40px rgba(0, 0, 0, 0.35);
    }
    /* 遮罩 */
    .sidebar-overlay {
        display: block !important;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.45);
        z-index: 150;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
    }
    .sidebar-overlay.active {
        opacity: 1;
        pointer-events: auto;
    }
    .expand-btn {
        display: none !important;
    }
    .sidebar .collapse-btn {
        display: inline-flex;
    }
}

/* ============================================================
   第三轮修复：主题按钮选中态 / 版本切换 / 用户消息操作栏
   ============================================================ */

/* 主题/模式按钮选中态：描边 + 对勾（不再用纯黑填充，避免像“暗色未生效”） */
.settings-option-btn.active {
    background: var(--hover-bg) !important;
    color: var(--text-primary) !important;
    border: 2px solid var(--text-primary) !important;
    box-shadow: none !important;
    font-weight: 600;
}
.settings-option-btn.active::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 0.75em;
    margin-left: 6px;
}

/* 版本切换：隐藏旧版本 + 气泡右下角切换按钮 */
.ai-version-hidden {
    display: none;
}
.ai-version-toggle {
    position: absolute;
    right: -7px;
    bottom: -7px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-secondary);
    font-size: 0.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    padding: 0;
}
.ai-version-toggle:hover {
    color: var(--text-primary);
    background: var(--hover-bg);
}

/* 操作栏：AI 消息靠左（头像侧），我的消息靠右 */
.message.sent .ai-actions {
    margin-left: 0;
    margin-right: 46px;
    justify-content: flex-end;
}
.message.sent .ai-truncated-hint {
    margin-left: 0;
    margin-right: 46px;
    text-align: right;
}

/* ============================================================
   第四轮：加载页 / 跳到底部 / 右键菜单 / AI设置模态 / 铺满屏 / 主题按钮
   ============================================================ */

/* ---------- 加载页 ---------- */
.splash-screen {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    background: var(--bg-gradient);
    transition: opacity 0.4s ease, visibility 0.4s ease;
}
.splash-screen.hide {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.splash-logo {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: var(--primary-gradient);
    color: var(--accent-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    box-shadow: var(--shadow-lg);
    animation: splashPulse 1.6s ease-in-out infinite;
}
@keyframes splashPulse {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.06); }
}
.splash-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 1px;
}

/* ---------- 聊天界面铺满屏幕 ---------- */
.chat-container,
.auth-container {
    max-width: none;
    width: 100%;
    margin: 0;
    height: 100vh;
    height: 100dvh;
    max-height: none;
    border-radius: 0;
}

/* ---------- 快捷回到最新消息 ---------- */
.jump-bottom-btn {
    position: absolute;
    right: 18px;
    bottom: 78px;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-secondary);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: all var(--transition-fast);
    z-index: 20;
}
.jump-bottom-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.jump-bottom-btn:hover {
    color: var(--text-primary);
    background: var(--hover-bg);
}
.main {
    position: relative;
}

/* ---------- 主题/模式按钮：统一选中态（描边+对勾，不用纯黑填充） ---------- */
.settings-option-btn.active {
    background: var(--hover-bg) !important;
    color: var(--text-primary) !important;
    border: 1.5px solid var(--text-secondary) !important;
    box-shadow: none !important;
    font-weight: 600;
}
.settings-option-btn.active::after {
    content: '\2713';
    font-family: inherit;
    font-weight: 700;
    font-size: 0.8em;
    margin-left: 5px;
    color: var(--text-secondary);
}

/* ---------- 右键 / 长按菜单 ---------- */
.context-menu {
    position: fixed;
    z-index: 10000;
    min-width: 150px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    padding: 5px;
    animation: ctxIn 0.12s ease-out;
}
@keyframes ctxIn {
    from { opacity: 0; transform: scale(0.96); }
    to   { opacity: 1; transform: scale(1); }
}
.context-menu .ctx-item {
    display: flex;
    align-items: center;
    gap: 9px;
    width: 100%;
    padding: 8px 12px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.85rem;
    border-radius: 7px;
    cursor: pointer;
    text-align: left;
}
.context-menu .ctx-item:hover {
    background: var(--hover-bg);
}
.context-menu .ctx-item i {
    width: 16px;
    text-align: center;
    color: var(--text-secondary);
}
.context-menu .ctx-item.danger {
    color: #c0392b;
}
[data-theme="dark"] .context-menu .ctx-item.danger {
    color: #e57373;
}

/* ---------- AI 设置模态 ---------- */
.ai-settings-modal-content {
    max-width: 440px;
    width: 92%;
}
.ai-settings-modal-content .form-group {
    margin-bottom: 12px;
}
.ai-settings-modal-content .form-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.ai-settings-modal-content .form-group label span {
    float: right;
    font-weight: 600;
    color: var(--text-primary);
}
.ai-settings-modal-content input[type="range"] {
    width: 100%;
    accent-color: var(--text-secondary);
}
.ai-settings-modal-content input[type="text"] {
    width: 100%;
    padding: 9px 12px;
    box-sizing: border-box;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.88rem;
    outline: none;
}
.ai-settings-modal-content input[type="text"]:focus {
    border-color: var(--text-secondary);
}

/* 设置面板内表单 */
.settings-body .form-group {
    margin-bottom: 12px;
}
.settings-body .form-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.settings-body .form-group input {
    width: 100%;
    padding: 9px 12px;
    box-sizing: border-box;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.88rem;
    outline: none;
}
.settings-body .form-group input:focus {
    border-color: var(--text-secondary);
}
/* 设置面板内多行输入（用户偏好等） */
.settings-body .form-group textarea {
    width: 100%;
    padding: 9px 12px;
    box-sizing: border-box;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.88rem;
    font-family: inherit;
    line-height: 1.6;
    resize: vertical;
    outline: none;
}
.settings-body .form-group textarea:focus {
    border-color: var(--text-secondary);
}

/* 联系人/气泡头像图片 */
.contact-avatar {
    overflow: hidden;
}
.contact-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    display: block;
}

/* AI 头像可点击（打开设置） */
.ai-avatar-btn {
    cursor: pointer;
    transition: box-shadow var(--transition-fast);
}
.ai-avatar-btn:hover {
    box-shadow: 0 0 0 2px var(--text-secondary);
}

/* 版本胶囊 <1/2> */
.ai-version-pill {
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.5px;
    min-width: 46px;
    text-align: center;
}

/* ============================================================
   第五轮修复：主题按钮显色 / 模态框高度 / 按钮尺寸统一
   ============================================================ */

/* 亮主题下所有主题按钮：白色卡片，绝不发黑 */
[data-theme="light"] .settings-option-btn,
:root .settings-option-btn:not(.active) {
    background: #ffffff !important;
    color: #333333 !important;
    border: 1px solid rgba(0, 0, 0, 0.18) !important;
}
/* 暗色主题按钮在亮主题下：白底 + 深灰月亮图标 */
[data-theme="light"] .settings-option-btn[data-theme="dark"],
:root .settings-option-btn[data-theme="dark"] {
    background: #ffffff !important;
    color: #444444 !important;
}
[data-theme="light"] .settings-option-btn[data-theme="dark"] i {
    color: #444444;
}
/* 暗主题下：深灰卡片 + 浅色图标 */
[data-theme="dark"] .settings-option-btn:not(.active) {
    background: #1c1c1c !important;
    color: #e6e6e6 !important;
    border: 1px solid rgba(255, 255, 255, 0.14) !important;
}

/* 选中态：亮主题=深色描边+对勾；暗主题=浅色描边+对勾（不整块填黑） */
[data-theme="light"] .settings-option-btn.active {
    background: #f2f2f2 !important;
    color: #1c1c1c !important;
    border: 1.5px solid #1c1c1c !important;
}
[data-theme="dark"] .settings-option-btn.active {
    background: rgba(255, 255, 255, 0.06) !important;
    color: #ffffff !important;
    border: 1.5px solid #ffffff !important;
}

/* ---------- 模态框：小于屏幕 + 内部滚动 ---------- */
.modal-content {
    max-height: 92vh;
    max-height: 92dvh;
    display: flex;
    flex-direction: column;
}
.modal-content .modal-body {
    overflow-y: auto;
    flex: 1 1 auto;
    min-height: 0;
}
.settings-modal-content,
.ai-settings-modal-content {
    max-width: 520px;
    width: 92%;
}
.ai-settings-modal-content {
    max-width: 440px;
}

/* ---------- 按钮尺寸统一 ---------- */
.ai-action-btn {
    padding: 5px 14px;
    font-size: 0.8rem;
    min-height: 30px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
}
.ai-action-btn i {
    font-size: 0.75rem;
}
.user-actions button,
.user-actions a.header-btn {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    font-size: 0.9rem;
    text-decoration: none;
}
.btn-primary,
.btn-secondary {
    padding: 9px 20px;
    font-size: 0.88rem;
    border-radius: 10px;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.collapse-btn,
.expand-btn {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.collapse-btn:hover,
.expand-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}
.settings-option-btn {
    padding: 6px 16px;
    font-size: 0.82rem;
}

/* ---------- 聊天标题栏操作按钮 ---------- */
.chat-header-actions {
    margin-left: auto;
    display: flex;
    gap: 6px;
    align-items: center;
}
.chat-header-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-secondary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
}
.chat-header-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}
.chat-header-btn.danger:hover {
    color: #c0392b;
    border-color: rgba(192, 57, 43, 0.4);
}
[data-theme="dark"] .chat-header-btn.danger:hover {
    color: #e57373;
}

/* ---------- 删除聊天记录模态框 ---------- */
.clear-history-modal-content {
    max-width: 560px;
    width: 94%;
    max-height: 80dvh;
}
.clear-history-hint {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin: 0 0 10px;
    line-height: 1.6;
}
.clear-history-hint b {
    color: #c0392b;
}
[data-theme="dark"] .clear-history-hint b {
    color: #e57373;
}
.clear-history-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 2px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.82rem;
    color: var(--text-secondary);
}
.clear-history-select-all {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}
.clear-history-list {
    max-height: 46dvh;
    overflow-y: auto;
    margin: 8px 0;
}
.clear-history-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 6px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border-color);
}
.clear-history-row:hover {
    background: var(--hover-bg);
}
.clear-history-row.checked {
    background: var(--hover-bg);
}
.clear-history-row input[type="checkbox"] {
    accent-color: var(--text-secondary);
    flex-shrink: 0;
}
.clear-history-role {
    flex-shrink: 0;
    font-size: 0.7rem;
    padding: 1px 8px;
    border-radius: 4px;
    background: var(--hover-bg);
    color: var(--text-secondary);
}
.clear-history-role.u {
    background: var(--bubble-sent);
    color: var(--bubble-sent-text);
}
.clear-history-text {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-primary);
}
.clear-history-time {
    flex-shrink: 0;
    font-size: 0.72rem;
    color: var(--text-tertiary);
}
.clear-history-empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 24px 0;
    font-size: 0.85rem;
}

/* ============================================================
   第六轮修复：按钮文字居中 / 尺寸统一 / 工具栏紧凑
   ============================================================ */

/* 主按钮文字居中（登录按钮等） */
.btn-primary {
    justify-content: center;
    text-align: center;
}

/* 模态框操作行按钮：大小一致、同一排 */
.form-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: nowrap;
}
.form-actions .btn-primary,
.form-actions .btn-secondary,
.form-actions .btn-danger {
    min-width: 96px;
    padding: 9px 18px;
    justify-content: center;
    box-sizing: border-box;
    flex: 0 0 auto;
}

/* 编辑角色模态框的操作行保持一行 */
.admin-modal .form-actions {
    flex-wrap: nowrap;
}

/* ============================================================
   第九轮整理：危险按钮全局统一（红色系，与 roles.css 一致）
   适用于删除聊天记录、删除联系人等所有确认类操作
   ============================================================ */
.btn-danger {
    background: #c0392b;
    border: none;
    color: #ffffff;
    border-radius: 10px;
    padding: 9px 20px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}
.btn-danger:hover {
    background: #a93226;
}
.btn-danger:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
[data-theme="dark"] .btn-danger {
    background: #e57373;
    color: #111111;
}
[data-theme="dark"] .btn-danger:hover {
    background: #f08b8b;
}

/* ============================================================
   UI 整理：清除遗留的靛紫/彩色光晕，统一灰阶
   ============================================================ */

/* 输入框聚焦：灰阶描边与光晕（登录框 / 发送框 / 模态表单） */
.auth-content .form-group input:focus,
#msgInput:focus,
.form-group input:focus {
    border-color: var(--text-secondary);
    box-shadow: 0 0 0 2px rgba(120, 120, 120, 0.22);
    background: var(--card-bg);
}
[data-theme="dark"] .auth-content .form-group input:focus,
[data-theme="dark"] #msgInput:focus,
[data-theme="dark"] .form-group input:focus {
    background: var(--card-bg);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.14);
}

/* 主按钮悬停：中性阴影（覆盖旧的紫色阴影） */
.btn-primary:hover,
.auth-content .btn-primary:hover {
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.16);
}
[data-theme="dark"] .btn-primary:hover,
[data-theme="dark"] .auth-content .btn-primary:hover {
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}

/* 编辑框聚焦：灰阶 */
.ai-edit-input:focus {
    border-color: var(--text-secondary);
}

/* 顶栏「管理后台」链接图标：灰色、悬停浅底（原先无颜色，会显示浏览器默认蓝） */
.user-actions a.header-btn {
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid transparent;
}
.user-actions a.header-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

/* 密码眼睛按钮：灰阶图标 */
.toggle-password {
    color: var(--text-secondary);
}
.toggle-password:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* ============================================================
   第十轮优化：动画系统 + 新主按钮 .btn-accent
   （.btn-primary 仅保留登录页使用；其余界面统一换用 .btn-accent）
   ============================================================ */

/* ---------- 新主按钮 .btn-accent（登录页以外的主操作按钮） ----------
   与 .btn-primary 视觉一致，但不强制 width:100%；
   在 .form-actions 中和取消按钮并排时自动各占 50%。 */
.btn-accent {
    background: var(--primary-gradient);
    color: var(--accent-text);
    border: none;
    border-radius: 10px;
    padding: 10px 22px;
    font-size: 0.88rem;
    font-weight: 600;
    line-height: 1.4;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: auto;
    margin: 0;
    box-sizing: border-box;
    transition: transform var(--transition-fast),
                box-shadow var(--transition-fast),
                background-color var(--transition-base);
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}
.btn-accent:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.16);
    background: var(--primary-hover);
}
.btn-accent:active {
    transform: scale(0.97);
}
.btn-accent:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none;
}
[data-theme="dark"] .btn-accent {
    color: #101010;
}
[data-theme="dark"] .btn-accent:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

/* 整行通栏主按钮（单个按钮撑满一行，如资料保存 / 模型设置保存） */
.btn-accent.block {
    width: 100%;
}

/* 操作行（取消 + 确定/删除 并排）→ 两个按钮各占 50% */
.form-actions .btn-accent,
.form-actions .btn-secondary,
.form-actions .btn-danger {
    flex: 1 1 0;
    min-width: 96px;
    padding: 9px 18px;
    justify-content: center;
    box-sizing: border-box;
}

/* 键盘可访问性焦点环 */
.btn-accent:focus-visible,
.btn-secondary:focus-visible,
.btn-danger:focus-visible,
.action-btn:focus-visible,
.ai-action-btn:focus-visible,
.settings-option-btn:focus-visible {
    outline: 2px solid var(--text-secondary);
    outline-offset: 2px;
}

/* ---------- 模态框：淡入淡出 + 弹出（打开 / 关闭双向动画） ---------- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}
.modal.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}
.modal .modal-content {
    animation: none; /* 停用旧的一次性 pop，改由 transition 控制开/关 */
    transform: scale(0.94) translateY(12px);
    transition: transform 0.28s cubic-bezier(0.2, 0.9, 0.3, 1.12),
                box-shadow var(--transition-base);
}
.modal.active .modal-content {
    transform: scale(1) translateY(0);
}

/* ---------- Toast（主应用）：底部滑入滑出 ---------- */
.toast {
    position: fixed;
    left: 50%;
    bottom: 40px;
    z-index: 9999;
    transform: translateX(-50%) translateY(20px) scale(0.96);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    padding: 12px 28px;
    border-radius: 40px;
    background: rgba(30, 30, 30, 0.94);
    color: #f2f2f2;
    font-size: 0.9rem;
    line-height: 1.5;
    box-shadow: var(--shadow-lg);
    transition: transform 0.35s cubic-bezier(0.2, 0.9, 0.3, 1.15),
                opacity 0.25s ease, visibility 0.25s ease;
}
.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0) scale(1);
}
.toast.success {
    border: 1px solid rgba(16, 185, 129, 0.55);
}
.toast.error {
    border: 1px solid rgba(239, 68, 68, 0.55);
}
[data-theme="dark"] .toast {
    background: rgba(240, 240, 240, 0.95);
    color: #141414;
}

/* ---------- 页面级入场动画 ---------- */
@keyframes pageIn {
    from { opacity: 0; transform: translateY(14px) scale(0.985); }
    to   { opacity: 1; transform: none; }
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: none; }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes chatIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: none; }
}

/* 登录页：容器 / 标题 / 表单 依次入场 */
.auth-page {
    animation: pageIn 0.5s cubic-bezier(0.22, 0.9, 0.32, 1.12) backwards;
}
.auth-header h1 {
    animation: fadeUp 0.45s 0.08s ease backwards;
}
.auth-header p {
    animation: fadeUp 0.45s 0.16s ease backwards;
}
.auth-content .form-group {
    animation: fadeUp 0.45s ease backwards;
}
.auth-content .form-group:nth-of-type(1) { animation-delay: 0.22s; }
.auth-content .form-group:nth-of-type(2) { animation-delay: 0.3s; }
.auth-content .btn-primary {
    animation: fadeUp 0.45s 0.38s ease backwards;
}

/* 聊天界面切入 / 退出（登录 ↔ 退出切换时） */
.chat-container {
    animation: chatIn 0.4s ease backwards;
}
.auth-container.fade-out,
.chat-container.fade-out {
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
}

/* ---------- 消息气泡：左右滑入（接收从左、发送从右） ---------- */
@keyframes msgInLeft {
    from { opacity: 0; transform: translateX(-16px); }
    to   { opacity: 1; transform: none; }
}
@keyframes msgInRight {
    from { opacity: 0; transform: translateX(16px); }
    to   { opacity: 1; transform: none; }
}
@keyframes msgFade {
    from { opacity: 0; }
    to   { opacity: 1; }
}
.message.received { animation: msgInLeft 0.3s cubic-bezier(0.2, 0.9, 0.3, 1) both; }
.message.sent     { animation: msgInRight 0.3s cubic-bezier(0.2, 0.9, 0.3, 1) both; }
.message.system   { animation: msgFade 0.3s ease both; }
.msg-time-label   { animation: msgFade 0.3s ease both; }

/* 发送失败：红框提示 + 重发行入场 */
.send-failed-row {
    animation: msgFade 0.3s ease both;
}
.message.send-failed .msg-bubble {
    border: 1px solid rgba(192, 57, 43, 0.5);
    box-shadow: 0 0 0 1px rgba(192, 57, 43, 0.12);
}

/* AI 就地编辑框入场 */
.ai-edit-input {
    animation: fadeUp 0.2s ease both;
}

/* ---------- 联系人列表：交错入场 + 选中指示条 ---------- */
@keyframes contactIn {
    from { opacity: 0; transform: translateX(-8px); }
    to   { opacity: 1; transform: none; }
}
.contact-item {
    position: relative;
    animation: contactIn 0.32s ease backwards;
    transition: background var(--transition-fast), transform var(--transition-fast);
}
.contact-item:hover {
    transform: translateX(2px);
}
.contact-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    bottom: 20%;
    width: 3px;
    border-radius: 3px;
    background: var(--text-primary);
    animation: growBar 0.25s ease;
}
@keyframes growBar {
    from { transform: scaleY(0); }
    to   { transform: scaleY(1); }
}
/* 交错延迟（最多 12 条，其余统一入场） */
.contact-item:nth-child(1)  { animation-delay: 0.02s; }
.contact-item:nth-child(2)  { animation-delay: 0.04s; }
.contact-item:nth-child(3)  { animation-delay: 0.06s; }
.contact-item:nth-child(4)  { animation-delay: 0.08s; }
.contact-item:nth-child(5)  { animation-delay: 0.10s; }
.contact-item:nth-child(6)  { animation-delay: 0.12s; }
.contact-item:nth-child(7)  { animation-delay: 0.14s; }
.contact-item:nth-child(8)  { animation-delay: 0.16s; }
.contact-item:nth-child(9)  { animation-delay: 0.18s; }
.contact-item:nth-child(10) { animation-delay: 0.20s; }
.contact-item:nth-child(11) { animation-delay: 0.22s; }
.contact-item:nth-child(12) { animation-delay: 0.24s; }
.contact-item:nth-child(n + 13) { animation-delay: 0.26s; }

/* ---------- 聊天标题栏按钮（AI 设置 / 删除记录）浮现 ---------- */
#chatAiSettingsBtn,
#clearHistoryBtn {
    animation: fadeIn 0.3s ease backwards;
}

/* ---------- 右键菜单：关闭动画 ---------- */
@keyframes ctxOut {
    to { opacity: 0; transform: scale(0.95); }
}
.context-menu.closing {
    animation: ctxOut 0.12s ease-in forwards;
}

/* ---------- 回到最新消息：点击弹跳 ---------- */
@keyframes bounceDown {
    0%   { transform: translateY(0); }
    40%  { transform: translateY(5px); }
    100% { transform: translateY(0); }
}
.jump-bottom-btn.bounced {
    animation: bounceDown 0.35s ease;
}

/* ---------- 全局按钮按压反馈（点击时轻微缩小） ---------- */
button:not(:disabled) {
    -webkit-tap-highlight-color: transparent;
}
/* 排除带定位位移的按钮（如侧栏展开钮 translateY(-50%)），避免按压时跳位 */
button:not(:disabled):not(.expand-btn):active {
    transform: scale(0.97);
}

/* ---------- 头像微交互 ---------- */
.msg-avatar {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.msg-avatar:hover {
    transform: scale(1.05);
}

/* ---------- 删除聊天记录行微交互（仅背景高亮，不做位移 → 避免点击抖动） ---------- */
.clear-history-row {
    transition: background var(--transition-fast),
                box-shadow var(--transition-fast);
}
.clear-history-row.checked {
    box-shadow: inset 3px 0 0 var(--text-secondary);
}

/* ---------- 移动端：操作行按钮纵向排列（确定在上） ---------- */
@media (max-width: 768px) {
    .form-actions {
        flex-direction: column-reverse;
    }
    .form-actions .btn-accent,
    .form-actions .btn-secondary,
    .form-actions .btn-danger {
        width: 100%;
    }
}

/* ---------- 减少动态偏好：尊重系统设置，关闭动画 ---------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================================
   第十一轮优化：头像显示尺寸规范 + 模态框顶部头像 + 编辑框描边
   （头像一律固定尺寸并 object-fit:cover 缩放，避免大图撑爆布局）
   ============================================================ */

/* ---------- 联系人列表头像：固定 36px，大图自动缩小居中裁剪 ---------- */
.contact-avatar {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 8px;
    background: var(--hover-bg);
    font-size: 1rem;
    color: var(--text-secondary);
}
.contact-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* ---------- 模态框顶部头像（个人资料 / AI 设置 / 编辑角色共用） ----------
   宽度与拟态框一致，高度按图片比例自适应（动态调整，完整显示不裁剪） */
.modal-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 2px 0 14px;
    width: 100%;
    min-height: 110px;
    padding: 12px;
    box-sizing: border-box;
    border-radius: 14px;
    background: var(--hover-bg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    color: var(--text-secondary);
    font-size: 2.4rem;
    flex-shrink: 0;
}
.modal-avatar img {
    max-width: 100%;
    max-height: 40vh;
    width: auto;
    height: auto;
    object-fit: contain;
    object-position: center;
    display: block;
}
[data-theme="dark"] .modal-avatar {
    border-color: rgba(255, 255, 255, 0.14);
}

/* 头像尺寸提示（置于输入框下方） */
.avatar-size-hint {
    display: block;
    margin-top: 4px;
    font-size: 0.7rem;
    line-height: 1.5;
    color: var(--text-tertiary);
}
.avatar-size-hint i {
    margin-right: 4px;
}

/* ---------- 消息编辑框：中性灰描边（修复明暗主题下边框与背景反差） ---------- */
.ai-edit-input {
    border: 1px solid var(--text-secondary);
    box-shadow: 0 0 0 2px rgba(120, 120, 120, 0.1);
}
[data-theme="dark"] .ai-edit-input {
    border-color: var(--text-secondary);
}
.ai-edit-input:focus {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(120, 120, 120, 0.18);
}
/* 我发送的消息（气泡底色与主题相反）内编辑：编辑框背景跟随气泡，描边中性灰 */
.message.sent.editing .ai-edit-input {
    background: var(--bubble-sent);
    color: var(--bubble-sent-text);
    border-color: var(--text-tertiary);
    box-shadow: 0 0 0 2px rgba(128, 128, 128, 0.18);
}

/* ============================================================
   第十二轮优化：**文字** 不再加粗 → 蓝色高亮（AI 消息中的强调标记）
   ============================================================ */
.ai-em {
    color: #2563eb;
    font-weight: inherit;
}
[data-theme="dark"] .ai-em {
    color: #60a5fa;
}

/* ============================================================
   第十三轮优化：AI 参数行布局 + 详情按钮 + 参数详情拟态框
   ============================================================ */

/* 参数行标题：左侧名称，右侧 数值 + 详情按钮 */
.form-group label.param-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
}
.param-controls {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}
.param-controls .param-value {
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

/* 详情按钮：右上角小圆钮 */
.param-info-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 0.68rem;
    line-height: 1;
    color: var(--text-secondary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}
.param-info-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
    border-color: var(--text-secondary);
    transform: scale(1.1);
}
.param-info-btn:active {
    transform: scale(0.94);
}

/* 参数详情拟态框 */
.param-info-modal {
    max-width: 440px;
    width: 92%;
}
.param-info-row {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 9px 0;
    border-bottom: 1px dashed var(--border-color);
}
.param-info-row:last-of-type {
    border-bottom: none;
}
.param-info-row .pi-label {
    flex-shrink: 0;
    min-width: 56px;
    font-size: 0.78rem;
    color: var(--text-tertiary);
    padding-top: 2px;
}
.param-info-row .pi-value {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.6;
}
.param-info-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 0 10px;
}
.param-info-desc {
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--text-primary);
}

/* ============================================================
   第十四轮优化：导演词（/cmd 临时提示词）+ 记忆管理
   ============================================================ */

/* ---------- 输入区：导演词输入框 + 主输入框 ---------- */
.input-wrap {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    min-width: 0;
}
.input-row {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}
/* 主输入框改为可换行 textarea */
#msgInput {
    resize: none;
    max-height: 120px;
    overflow-y: auto;
    line-height: 1.5;
    font-family: inherit;
    padding-top: 10px;
    padding-bottom: 10px;
}
#directorToggleBtn.active {
    background: var(--hover-bg);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}
.director-box {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--input-bg);
    border: 1px dashed var(--border-color);
    border-radius: 10px;
    animation: fadeUp 0.2s ease both;
}
.director-box .director-label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
}
.director-box .director-label i {
    margin-right: 4px;
    color: var(--text-tertiary);
}
#directorInput {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
    padding: 2px 0;
}
#directorInput::placeholder {
    color: var(--text-tertiary);
}

/* ---------- 导演词气泡（聊天记录中的特别显示） ---------- */
.message.director {
    display: flex;
    justify-content: center;
    margin-bottom: 4px;
    animation: msgFade 0.3s ease both;
}
.msg-director {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    max-width: 82%;
    padding: 6px 14px;
    font-size: 0.78rem;
    line-height: 1.6;
    color: var(--text-secondary);
    background: var(--input-bg);
    border: 1px dashed var(--border-color);
    border-radius: 10px;
}
.msg-director > i {
    color: var(--text-tertiary);
    flex-shrink: 0;
}
.msg-director-text {
    word-break: break-word;
    white-space: pre-wrap;
}
.director-copy {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    font-size: 0.72rem;
    cursor: pointer;
    padding: 2px;
    opacity: 0.55;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}
.director-copy:hover {
    opacity: 1;
    color: var(--text-primary);
}

/* ---------- 记忆管理（编辑角色模态框） ---------- */
.memory-manage {
    margin-top: 2px;
}
.memory-actions-row {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}
.memory-item {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 10px 12px;
    margin-bottom: 8px;
    background: var(--card-bg);
    transition: box-shadow var(--transition-fast);
}
.memory-item:hover {
    box-shadow: var(--shadow-sm);
}
.memory-item .memory-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
    font-size: 0.7rem;
    color: var(--text-tertiary);
}
/* 记忆的情绪标签（第 17 项） */
.memory-emotion {
    display: inline-block;
    padding: 1px 7px;
    margin: 0 2px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--hover-bg);
    color: var(--text-secondary);
    font-size: 0.68rem;
}

/* ---------- 承诺/待办列表（第 18 项，聊天页弹窗） ---------- */
.commitment-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    margin-bottom: 8px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--card-bg);
    transition: box-shadow var(--transition-fast);
}
.commitment-item:hover {
    box-shadow: var(--shadow-sm);
}
.commitment-item.done .commitment-content {
    text-decoration: line-through;
    color: var(--text-tertiary);
}
.commitment-item input[type="checkbox"] {
    margin-top: 3px;
    accent-color: var(--text-secondary);
    flex-shrink: 0;
    cursor: pointer;
}
.commitment-body {
    flex: 1;
    min-width: 0;
}
.commitment-content {
    font-size: 0.86rem;
    line-height: 1.6;
    color: var(--text-primary);
    word-break: break-word;
}
.commitment-time {
    font-size: 0.68rem;
    color: var(--text-tertiary);
    margin-top: 3px;
}
.commitment-del {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 0.8rem;
    padding: 2px 4px;
    flex-shrink: 0;
    transition: color var(--transition-fast);
}
.commitment-del:hover {
    color: #c0392b;
}
.commitments-empty {
    color: var(--text-tertiary);
    font-size: 0.82rem;
    text-align: center;
    padding: 18px 0;
}

/* ============================================================
   第十五轮：聊天交互增强（搜索 / 引用 / 收藏 / 表情 / 编辑历史）
   ============================================================ */

/* ---------- 输入框上方的引用条（第 21 项） ---------- */
.quote-box {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--input-bg);
    border-left: 3px solid var(--text-tertiary);
    border-radius: 8px;
    animation: fadeUp 0.2s ease both;
}
.quote-box .quote-label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
}
.quote-box .quote-text {
    flex: 1;
    min-width: 0;
    font-size: 0.78rem;
    color: var(--text-tertiary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.quote-box .quote-cancel {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0 4px;
    flex-shrink: 0;
}
.quote-box .quote-cancel:hover {
    color: var(--text-primary);
}

/* ---------- 气泡内的被引用消息缩略 ---------- */
.msg-quote {
    display: flex;
    align-items: center;
    gap: 6px;
    max-width: 100%;
    margin-bottom: 6px;
    padding: 4px 8px;
    border-left: 2px solid currentColor;
    border-radius: 4px;
    background: rgba(128, 128, 128, 0.12);
    font-size: 0.74rem;
    opacity: 0.85;
    cursor: pointer;
    overflow: hidden;
}
.msg-quote span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ---------- 已编辑标记 ---------- */
.msg-edited {
    display: inline-block;
    margin-top: 4px;
    font-size: 0.66rem;
    color: var(--text-tertiary);
    cursor: pointer;
    user-select: none;
}
.msg-edited:hover {
    color: var(--text-secondary);
    text-decoration: underline;
}

/* ---------- 收藏星标 ---------- */
.message.favorited .msg-bubble::before {
    content: '★';
    position: absolute;
    top: -8px;
    right: -6px;
    font-size: 0.7rem;
    color: #e0a800;
    background: var(--card-bg);
    border-radius: 50%;
    padding: 0 2px;
    line-height: 1;
}
.msg-bubble {
    position: relative;
}

/* ---------- 表情回应 ---------- */
.reaction-picker {
    position: fixed;
    z-index: 10001;
    display: flex;
    gap: 4px;
    padding: 6px 8px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    box-shadow: var(--shadow-lg);
    animation: fadeUp 0.15s ease both;
}
.reaction-opt {
    background: transparent;
    border: none;
    font-size: 1.05rem;
    cursor: pointer;
    padding: 2px 5px;
    border-radius: 50%;
    line-height: 1;
    transition: transform var(--transition-fast), background var(--transition-fast);
}
.reaction-opt:hover {
    transform: scale(1.25);
    background: var(--hover-bg);
}
.reaction-bar {
    display: flex;
    gap: 5px;
    margin: 4px 0 0 46px;
    flex-wrap: wrap;
}
.message.sent .reaction-bar {
    margin-left: 0;
    margin-right: 46px;
    justify-content: flex-end;
}
.reaction-chip {
    display: inline-flex;
    align-items: center;
    padding: 1px 7px;
    font-size: 0.78rem;
    line-height: 1.5;
    background: var(--hover-bg);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.reaction-chip:hover {
    background: var(--card-bg);
    border-color: var(--text-secondary);
}

/* ---------- 搜索 / 收藏 / 编辑历史 弹窗 ---------- */
.search-modal-content,
.favorites-modal-content,
.edits-modal-content {
    max-width: 520px;
    width: 92%;
}
.search-results,
.favorites-list,
.edits-list {
    max-height: 56dvh;
    overflow-y: auto;
}
.search-item {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
    padding: 9px 10px;
    margin-bottom: 6px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    cursor: pointer;
    transition: background var(--transition-fast);
}
.search-item:hover {
    background: var(--hover-bg);
}
.search-item-head {
    display: flex;
    gap: 8px;
    align-items: center;
    font-size: 0.68rem;
    color: var(--text-tertiary);
    margin-bottom: 3px;
}
.search-role {
    color: var(--text-secondary);
    font-weight: 600;
}
.search-item-text {
    font-size: 0.84rem;
    line-height: 1.6;
    color: var(--text-primary);
    word-break: break-word;
}
.edit-version {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 9px 11px;
    margin-bottom: 8px;
}
.edit-version.current {
    border-color: var(--text-secondary);
    background: var(--hover-bg);
}
.edit-version-head {
    font-size: 0.68rem;
    color: var(--text-tertiary);
    margin-bottom: 5px;
}
.edit-version-text {
    font-size: 0.84rem;
    line-height: 1.7;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-word;
}

/* ---------- 搜索定位高亮 ---------- */
@keyframes msgHighlight {
    0%, 100% { background: transparent; }
    30% { background: rgba(224, 168, 0, 0.18); }
}
.message.msg-highlight .msg-bubble {
    animation: msgHighlight 2s ease;
    box-shadow: 0 0 0 2px rgba(224, 168, 0, 0.5);
}

/* ============================================================
   第十六轮：导出弹窗 + 归档区（第 26、29 项）
   ============================================================ */
.export-modal-content {
    max-width: 460px;
    width: 92%;
}
.export-modal-content .settings-options {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.export-modal-content input[type="date"] {
    width: 100%;
    padding: 8px 10px;
    box-sizing: border-box;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    outline: none;
}
.export-modal-content input[type="date"]:focus {
    border-color: var(--text-secondary);
}

/* 归档行 / 归档标签 */
.archived-tag {
    display: inline-block;
    font-size: 0.72rem;
    color: var(--text-tertiary);
    background: var(--hover-bg);
    border: 1px dashed var(--border-color);
    border-radius: 999px;
    padding: 2px 10px;
}
.archived-row td {
    opacity: 0.85;
}
#archiveToggleBtn.active {
    background: var(--hover-bg) !important;
    border-color: var(--text-secondary) !important;
    color: var(--text-primary) !important;
}

/* ---------- Turnstile 组件容器（第 9 项） ---------- */
.turnstile-slot {
    display: flex;
    justify-content: center;
    margin-top: 8px;
}
.turnstile-slot:empty {
    display: none;
    margin: 0;
}
.auth-content .turnstile-slot {
    margin-bottom: 6px;
}
.memory-item .memory-content {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-word;
}
.memory-item textarea {
    width: 100%;
    min-height: 70px;
    box-sizing: border-box;
    padding: 8px 10px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
    resize: vertical;
    outline: none;
}
.memory-item textarea:focus {
    border-color: var(--text-secondary);
}
.memory-actions button {
    margin-left: 6px;
    padding: 2px 10px;
    font-size: 0.72rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.memory-actions button:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}
.memory-actions button.memory-del:hover {
    color: #c0392b;
    border-color: rgba(192, 57, 43, 0.4);
    background: rgba(192, 57, 43, 0.06);
}
.memory-empty {
    color: var(--text-tertiary);
    font-size: 0.8rem;
    text-align: center;
    padding: 12px 0;
}