/* ========================================
   基础样式
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --sidebar-width: 280px;
    --navbar-height: 60px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ========================================
   导航栏
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 1000;
}

.nav-brand a {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-brand i {
    font-size: 24px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s;
}

.nav-link:hover {
    background: var(--bg-color);
    color: var(--text-primary);
}

.nav-link.admin-link {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.nav-link.admin-link:hover {
    background: rgba(245, 158, 11, 0.2);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    margin-left: 8px;
    border-left: 1px solid var(--border-color);
}

.user-link {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s;
}

.user-link:hover {
    opacity: 0.8;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.nav-user span {
    font-size: 14px;
    color: var(--text-primary);
}

.logout-link {
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 4px;
}

.logout-link:hover {
    color: var(--error-color);
    background: rgba(239, 68, 68, 0.1);
}

.login-link {
    background: #07c160;
    color: white !important;
}

.login-link:hover {
    background: #06ad56;
}

/* ========================================
   主内容区
======================================== */
.main-content {
    margin-top: var(--navbar-height);
    min-height: calc(100vh - var(--navbar-height));
}

/* ========================================
   按钮样式
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

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

.btn-secondary {
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-danger {
    background: var(--error-color);
    color: white;
}

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

.btn-large {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* ========================================
   首页样式
======================================== */
.hero-section {
    padding: 60px 24px;
}

.hero-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 80px;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary-color), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.hero-actions .btn {
    min-width: 200px;
}

.hero-actions .hint {
    font-size: 12px;
    color: var(--text-secondary);
}

.features-section h2 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 40px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), #7c3aed);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.feature-icon i {
    font-size: 28px;
    color: white;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========================================
   聊天页面样式
======================================== */
.chat-container {
    display: flex;
    height: calc(100vh - var(--navbar-height));
}

.chat-sidebar {
    width: var(--sidebar-width);
    background: var(--card-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-header .btn {
    flex: 1;
}

.sidebar-toggle-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-color);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.sidebar-toggle-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

/* 侧边栏折叠状态 */
.chat-container.sidebar-collapsed .chat-sidebar {
    width: 0;
    overflow: hidden;
    border-right: none;
}

.chat-container.sidebar-collapsed .sidebar-toggle-btn {
    position: fixed;
    left: 16px;
    top: calc(var(--navbar-height) + 16px);
    z-index: 100;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* ========================================
   股票面板样式
======================================== */
.stock-panel {
    width: 400px;
    background: var(--card-bg);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
}

.stock-panel-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-color);
}

.stock-panel-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.stock-panel-title i {
    color: var(--primary-color);
}

.stock-panel-toggle-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: var(--card-bg);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.stock-panel-toggle-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.stock-panel-content {
    flex: 1;
    overflow: hidden;
    position: relative;
    min-height: 0;
}

.stock-panel-content iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

/* 股票面板展开时平铺整个页面 */
.chat-stock-container {
    display: flex;
    height: calc(100vh - var(--navbar-height));
}

/* 当股票面板展开时，聊天区域缩小 */
.chat-stock-container:not(.stock-panel-collapsed) .chat-main {
    flex: 0 0 45%;
    max-width: 45%;
}

.chat-stock-container:not(.stock-panel-collapsed) .stock-panel {
    flex: 1;
    width: auto;
}

/* 股票面板折叠状态 */
.chat-stock-container.stock-panel-collapsed .stock-panel {
    width: 0;
    overflow: hidden;
    border-left: none;
}

.chat-stock-container.stock-panel-collapsed .chat-main {
    flex: 1;
    max-width: none;
}

/* 股票面板展开时，隐藏聊天区域 */
.chat-stock-container:not(.stock-panel-collapsed) .chat-main {
    display: none;
}

/* 股票面板展开时，股票面板占据整个宽度 */
.chat-stock-container:not(.stock-panel-collapsed) .stock-panel {
    flex: 1;
    width: 100%;
}

.chat-stock-container.stock-panel-collapsed .stock-panel-toggle-btn {
    position: fixed;
    right: 16px;
    top: calc(var(--navbar-height) + 16px);
    z-index: 100;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.sessions-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.sessions-list h4 {
    font-size: 12px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.session-item {
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 8px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.session-item:hover {
    background: var(--bg-color);
}

.session-item:hover .session-delete-btn {
    opacity: 1;
}

.session-item.active {
    background: rgba(37, 99, 235, 0.1);
    border-left: 3px solid var(--primary-color);
}

.session-info {
    flex: 1;
    min-width: 0;
}

.session-title {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
}

.session-delete-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    opacity: 0;
    transition: all 0.2s;
    flex-shrink: 0;
}

.session-delete-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-color);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.welcome-message {
    text-align: center;
    padding: 60px 20px;
}

.welcome-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #7c3aed);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.welcome-icon i {
    font-size: 36px;
    color: white;
}

.welcome-message h3 {
    font-size: 24px;
    margin-bottom: 24px;
}

.welcome-message p {
    color: var(--text-secondary);
}

.welcome-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 300px;
    margin: 0 auto;
}

.welcome-steps .step {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--card-bg);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.welcome-steps .step-num {
    width: 28px;
    height: 28px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
}

.message {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    max-width: 80%;
}

.message.user-message {
    margin-left: auto;
    flex-direction: row-reverse;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.message.user-message .message-avatar {
    background: var(--primary-color);
    color: white;
}

.message-content {
    background: var(--card-bg);
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.message.user-message .message-content {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.message-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
    font-size: 12px;
}

.message-author {
    font-weight: 500;
}

.message-time {
    color: var(--text-secondary);
}

.message.user-message .message-time {
    color: rgba(255, 255, 255, 0.7);
}

.message-body {
    font-size: 14px;
    line-height: 1.6;
}

/* 消息内容包装器 - 用于复制按钮定位 */
.message-body-wrapper {
    position: relative;
}

/* 复制按钮 */
.copy-btn {
    position: absolute;
    top: 0;
    right: 0;
    padding: 6px 10px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.copy-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.copy-btn.copied {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

/* 鼠标悬停消息时显示复制按钮 */
.message:hover .copy-btn {
    opacity: 1;
    visibility: visible;
}

/* 用户消息的复制按钮样式 */
.message.user-message .copy-btn {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.8);
}

.message.user-message .copy-btn:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: white;
    color: var(--primary-color);
}

.chat-input-container {
    padding: 16px 24px;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
}

.chat-form {
    max-width: 800px;
    margin: 0 auto;
}

.input-wrapper {
    display: flex;
    gap: 12px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px;
    align-items: flex-end;
}

.input-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 80px;
}

.message-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0 4px;
    font-size: 14px;
    resize: none;
    outline: none;
    min-height: 60px;
    max-height: 200px;
    line-height: 1.5;
}

.input-toolbar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-top: 6px;
    padding-top: 0;
}

.send-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: var(--text-secondary);
    color: white;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-bottom: 2px;
}

.send-btn:hover:not(:disabled) {
    background: var(--text-primary);
}

.send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.send-btn i {
    font-size: 14px;
}

/* 输入框内工具栏 - 智能体选择器 */
.agent-selector-inline {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    font-size: 12px;
}

.agent-selector-inline i {
    color: var(--primary-color);
    font-size: 12px;
}

.agent-select {
    padding: 3px 8px;
    border: 1px solid transparent;
    border-radius: 4px;
    background: transparent;
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
    outline: none;
    transition: all 0.2s;
    max-width: 120px;
}

.agent-select:hover {
    background: var(--card-bg);
    border-color: var(--border-color);
}

.agent-select:focus {
    background: var(--card-bg);
    border-color: var(--primary-color);
}

.agent-hint {
    color: var(--text-secondary);
    font-size: 11px;
    max-width: 150px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ========================================
   表单样式
======================================== */
.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.form-group .required {
    color: var(--error-color);
}

.form-group .hint {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
}

.checkbox-label {
    display: flex !important;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input {
    width: 18px;
    height: 18px;
}

/* ========================================
   表格样式
======================================== */
.table-container {
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 14px 16px;
    text-align: left;
    font-size: 14px;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--bg-color);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
}

.data-table tbody tr:hover {
    background: var(--bg-color);
}

.data-table code {
    background: var(--bg-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
}

/* ========================================
   模态框样式
======================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 16px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 18px;
}

.modal-body {
    padding: 24px;
}

.modal form {
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-color);
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
}

.close-btn:hover {
    background: var(--bg-color);
}

/* ========================================
   通用组件
======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

.page-header {
    margin-bottom: 32px;
}

.page-header h1 {
    font-size: 28px;
    margin-bottom: 8px;
}

.page-header p {
    color: var(--text-secondary);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 18px;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* 智能体卡片 */
.agents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.agent-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.3s;
}

.agent-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.agent-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.agent-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), #7c3aed);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.agent-icon i {
    font-size: 20px;
    color: white;
}

.agent-info h3 {
    font-size: 16px;
    margin-bottom: 4px;
}

.agent-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.agent-prompt-preview {
    background: var(--bg-color);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
}

.agent-prompt-preview label {
    font-size: 12px;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 8px;
}

.agent-prompt-preview pre {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-all;
    margin: 0;
}

.agent-footer {
    display: flex;
    justify-content: flex-end;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.badge-inactive {
    background: var(--bg-color);
    color: var(--text-secondary);
}

.badge-info {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.badge-model {
    background: var(--bg-color);
    color: var(--text-secondary);
}

/* Alert */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

/* Flash messages */
.flash-messages {
    position: fixed;
    top: calc(var(--navbar-height) + 20px);
    right: 20px;
    z-index: 1500;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.flash-messages .alert {
    min-width: 300px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* Loading */
.loading {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
}

.loading i {
    margin-right: 8px;
}

/* Utilities */
.text-center {
    text-align: center;
}

.error-text {
    color: var(--error-color);
    font-style: italic;
}

/* ========================================
   Markdown 内容样式（优化版）
======================================== */
.message-body {
    line-height: 1.6;
}

/* 标题样式 - 紧凑间距 */
.message-body h1,
.message-body h2,
.message-body h3,
.message-body h4,
.message-body h5,
.message-body h6 {
    margin-top: 12px;
    margin-bottom: 6px;
    font-weight: 600;
    line-height: 1.4;
}

.message-body h1:first-child,
.message-body h2:first-child,
.message-body h3:first-child,
.message-body h4:first-child,
.message-body h5:first-child,
.message-body h6:first-child {
    margin-top: 0;
}

.message-body h1 { font-size: 1.4em; }
.message-body h2 { font-size: 1.25em; }
.message-body h3 { font-size: 1.1em; }
.message-body h4,
.message-body h5,
.message-body h6 { font-size: 1em; }

/* 段落样式 - 减少间距 */
.message-body p {
    margin-bottom: 6px;
    margin-top: 0;
}

.message-body p:last-child {
    margin-bottom: 0;
}

/* 代码块样式 */
.message-body pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 12px 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 8px 0;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.5;
}

.message-body code {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    padding: 2px 5px;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}

.message-body pre code {
    background: none;
    color: inherit;
    padding: 0;
    border-radius: 0;
}

/* 列表样式 - 紧凑 */
.message-body ul,
.message-body ol {
    margin: 6px 0;
    padding-left: 20px;
}

.message-body li {
    margin-bottom: 2px;
}

.message-body li:last-child {
    margin-bottom: 0;
}

/* 列表嵌套 */
.message-body li > ul,
.message-body li > ol {
    margin: 2px 0;
}

/* 引用块样式 */
.message-body blockquote {
    border-left: 3px solid var(--primary-color);
    padding-left: 12px;
    margin: 8px 0;
    color: var(--text-secondary);
    font-style: italic;
}

.message-body blockquote p {
    margin-bottom: 4px;
}

/* 表格样式 */
.message-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 14px;
}

.message-body th,
.message-body td {
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.message-body th {
    background: var(--bg-color);
    font-weight: 600;
}

.message-body tr:nth-child(even) {
    background: var(--bg-color);
}

/* 链接样式 */
.message-body a {
    color: var(--primary-color);
    text-decoration: none;
}

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

/* 粗体和斜体 */
.message-body strong {
    font-weight: 600;
    color: var(--text-primary);
}

.message-body em {
    font-style: italic;
}

/* 水平线 */
.message-body hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 12px 0;
}

/* 段落和换行处理 - 移除多余空行 */
.message-body br {
    display: block;
    content: "";
    margin-top: 4px;
}

/* ========================================
   字数统计样式
======================================== */
.input-counter {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-top: 6px;
    font-size: 11px;
    color: var(--text-secondary);
    padding: 2px 8px;
    background: var(--card-bg);
    border-radius: 4px;
    border: 1px solid var(--border-color);
    align-self: flex-end;
    margin-right: 8px;
}

.input-counter #char-count {
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 3px;
}

/* 当字数接近限制时的警告样式 */
.input-counter.warning {
    color: var(--warning-color);
    border-color: var(--warning-color);
    background: rgba(245, 158, 11, 0.1);
}

.input-counter.warning #char-count {
    color: var(--warning-color);
}

.input-counter.error {
    color: var(--error-color);
    border-color: var(--error-color);
    background: rgba(239, 68, 68, 0.1);
}

.input-counter.error #char-count {
    color: var(--error-color);
}

/* 暗色主题适配 */
.dark-theme .input-counter {
    background: #2d3748;
    border-color: #4a5568;
    color: #a0aec0;
}

.dark-theme .input-counter #char-count {
    color: #e2e8f0;
}

.dark-theme .input-counter.warning {
    background: rgba(245, 158, 11, 0.2);
    border-color: rgba(245, 158, 11, 0.5);
    color: #f6ad55;
}

.dark-theme .input-counter.error {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.5);
    color: #fc8181;
}

/* 用户消息的 Markdown 样式（简化版） */
.message.user-message .message-body code {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.message.user-message .message-body pre {
    background: rgba(0, 0, 0, 0.3);
    color: white;
}