/* ============= CSS变量 ============= */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --bg-color: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --sidebar-width: 260px;
    --top-bar-height: 56px;
    --transition: all 0.2s ease;
}

/* ============= 重置样式 ============= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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;
}

/* ============= 应用容器 ============= */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ============= 侧边栏 ============= */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: 100;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.new-chat-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

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

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.chat-history {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

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

.chat-item.active {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.chat-item-icon {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    flex-shrink: 0;
}

.chat-item-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 14px;
}

.chat-item-delete {
    opacity: 0;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-tertiary);
    transition: var(--transition);
}

.chat-item:hover .chat-item-delete {
    opacity: 1;
}

.chat-item-delete:hover {
    color: #ef4444;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.settings-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.settings-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* ============= 主内容区 ============= */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* ============= 顶部导航栏 ============= */
.top-bar {
    height: var(--top-bar-height);
    display: flex;
    align-items: center;
    padding: 0 16px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-color);
    z-index: 10;
}

.menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.model-selector {
    flex: 1;
    display: flex;
    justify-content: center;
}

.model-select {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-color);
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
    transition: var(--transition);
    min-width: 200px;
}

.model-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.top-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.action-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* ============= 对话容器 ============= */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}

/* ============= 欢迎页面 ============= */
.welcome-page {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 20px;
}

.welcome-content {
    text-align: center;
    max-width: 600px;
}

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

.welcome-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.welcome-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.suggestion-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.suggestion-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.suggestion-card:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.card-icon {
    width: 40px;
    height: 40px;
    background-color: var(--primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
}

.card-text {
    flex: 1;
    min-width: 0;
}

.card-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.card-desc {
    font-size: 12px;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ============= 消息列表 ============= */
.messages-list {
    display: none;
    flex-direction: column;
    padding: 20px 0;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.messages-list.active {
    display: flex;
}

.message {
    display: flex;
    padding: 16px 24px;
    gap: 16px;
    animation: fadeIn 0.3s ease;
}

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

.message-user {
    background-color: var(--bg-color);
}

.message-assistant {
    background-color: var(--bg-secondary);
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
}

.message-user .message-avatar {
    background-color: #10b981;
    color: white;
}

.message-assistant .message-avatar {
    background: linear-gradient(135deg, var(--primary-color), #7c3aed);
    color: white;
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message-role {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
    text-transform: uppercase;
}

.message-text {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-primary);
    word-wrap: break-word;
}

.message-text p {
    margin-bottom: 12px;
}

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

.message-text ul, .message-text ol {
    margin: 12px 0;
    padding-left: 24px;
}

.message-text li {
    margin-bottom: 8px;
}

.message-text code {
    background-color: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 14px;
}

.message-text pre {
    background-color: #1e1e1e;
    border-radius: var(--radius-md);
    padding: 16px;
    margin: 12px 0;
    overflow-x: auto;
    position: relative;
}

.message-text pre code {
    background: none;
    padding: 0;
    color: #d4d4d4;
    font-size: 13px;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background-color: #2d2d2d;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    margin-bottom: -16px;
}

.code-lang {
    font-size: 12px;
    color: #808080;
}

.copy-code-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: #808080;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

.copy-code-btn:hover {
    color: #d4d4d4;
}

.message-text blockquote {
    border-left: 4px solid var(--primary-color);
    padding: 12px 16px;
    margin: 12px 0;
    background-color: var(--primary-light);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.message-text table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
}

.message-text th, .message-text td {
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    text-align: left;
}

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

.message-text a {
    color: var(--primary-color);
    text-decoration: none;
}

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

.message-text img {
    max-width: 100%;
    border-radius: var(--radius-md);
    margin: 12px 0;
}

.message-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    opacity: 1;
}

.message:hover .message-actions {
    opacity: 1;
}

.message-action-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px 10px;
    color: var(--text-tertiary);
    border-radius: var(--radius-sm);
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

.message-action-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.thinking-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 8px;
}

.thinking-dots {
    display: flex;
    gap: 4px;
}

.thinking-dots span {
    width: 6px;
    height: 6px;
    background-color: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.thinking-dots span:nth-child(1) { animation-delay: -0.32s; }
.thinking-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.cursor-blink {
    display: inline-block;
    width: 2px;
    height: 16px;
    background-color: var(--primary-color);
    animation: blink 1s infinite;
    vertical-align: text-bottom;
    margin-left: 2px;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ============= 输入区域 ============= */
.input-area {
    padding: 0 24px 24px;
    background-color: var(--bg-color);
}

.feature-toggles {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    justify-content: center;
    align-items: center;
}

.model-switcher {
    position: relative;
}

.quick-model-select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background-color: var(--bg-color);
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
    transition: var(--transition);
    min-width: 140px;
    max-width: 200px;
}

.quick-model-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.1);
}

.quick-model-select:hover {
    border-color: var(--primary-color);
}

.toggle-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
    transition: var(--transition);
}

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

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

.input-container {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.input-container:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.file-preview {
    padding: 12px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--border-color);
}

.file-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
}

.file-item-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

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

.file-item-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-item-size {
    font-size: 11px;
    color: var(--text-tertiary);
}

.file-item-remove {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-tertiary);
    padding: 2px;
    transition: var(--transition);
}

.file-item-remove:hover {
    color: #ef4444;
}

.file-item-preview {
    width: 48px;
    height: 48px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    padding: 12px;
    gap: 8px;
}

.attach-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-tertiary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    flex-shrink: 0;
}

.attach-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.message-input {
    flex: 1;
    border: none;
    background: none;
    resize: none;
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-primary);
    outline: none;
    max-height: 200px;
    min-height: 24px;
}

.message-input::placeholder {
    color: var(--text-tertiary);
}

.send-btn, .stop-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    flex-shrink: 0;
}

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

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

.send-btn:disabled {
    background-color: var(--bg-tertiary);
    color: var(--text-tertiary);
    cursor: not-allowed;
}

.stop-btn {
    background-color: #ef4444;
    color: white;
}

.stop-btn:hover {
    background-color: #dc2626;
}

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 12px 8px;
    font-size: 12px;
    color: var(--text-tertiary);
}

.char-count {
    font-variant-numeric: tabular-nums;
}

/* ============= 弹窗 ============= */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--bg-color);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 560px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-sm {
    max-width: 400px;
}

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

.modal-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-tertiary);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.settings-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.tab-btn {
    padding: 8px 16px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

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

.tab-btn.active {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.tab-panel {
    display: none;
}

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

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
    background-color: var(--bg-color);
    outline: none;
    transition: var(--transition);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.input-with-action {
    display: flex;
    gap: 8px;
}

.input-with-action .form-input {
    flex: 1;
}

.toggle-visibility {
    background: none;
    border: 1px solid var(--border-color);
    cursor: pointer;
    padding: 8px 12px;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.toggle-visibility:hover {
    background-color: var(--bg-tertiary);
}

.slider-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.form-slider {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
}

.form-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
}

.slider-value {
    min-width: 40px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-hint {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

.models-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 16px;
}

.model-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.model-item-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.model-item-name {
    font-size: 14px;
    font-weight: 500;
}

.model-item-id {
    font-size: 12px;
    color: var(--text-secondary);
}

.model-item-badges {
    display: flex;
    gap: 6px;
}

.badge {
    padding: 2px 8px;
    font-size: 11px;
    border-radius: 10px;
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.model-item-actions {
    display: flex;
    gap: 8px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

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

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.btn-danger {
    background-color: #fee2e2;
    color: #ef4444;
}

.btn-danger:hover {
    background-color: #fecaca;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-group {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.btn-group .btn {
    flex: 1;
}

/* ============= API 状态样式 ============= */
.api-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--text-tertiary);
}

.status-dot.connected {
    background-color: #10b981;
}

.status-dot.error {
    background-color: #ef4444;
}

.form-input[readonly] {
    background-color: var(--bg-secondary);
    cursor: not-allowed;
    opacity: 0.7;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ============= 加载动画 ============= */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============= Toast通知 ============= */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideIn 0.3s ease;
}

.toast-success {
    border-left: 4px solid #10b981;
}

.toast-error {
    border-left: 4px solid #ef4444;
}

.toast-info {
    border-left: 4px solid var(--primary-color);
}

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

/* ============= 响应式设计 ============= */
@media (max-width: 768px) {
    /* 侧边栏 */
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
        z-index: 1000;
        width: 80%;
        max-width: 300px;
        background-color: #ffffff;
        border-right: 1px solid #e5e7eb;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .sidebar-header {
        background-color: #ffffff;
        border-bottom: 1px solid #e5e7eb;
    }

    .sidebar-content {
        background-color: #ffffff;
    }

    .sidebar-footer {
        background-color: #ffffff;
        border-top: 1px solid #e5e7eb;
    }

    .chat-item:hover {
        background-color: #f3f4f6;
    }

    .chat-item.active {
        background-color: #eef2ff;
        color: #4f46e5;
    }

    .settings-btn {
        border: 1px solid #e5e7eb;
        color: #6b7280;
    }

    .settings-btn:hover {
        background-color: #f3f4f6;
        color: #111827;
    }

    /* 遮罩层 */
    .sidebar-overlay {
        display: none;
        position: fixed;
        left: 0;
        right: 0;
        top: 0;
        bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 999;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .menu-btn {
        display: flex;
    }

    /* 顶部栏 */
    .top-bar {
        padding: 0 12px;
        height: 50px;
    }

    .model-select {
        min-width: 120px;
        max-width: 150px;
        font-size: 13px;
        padding: 6px 10px;
    }

    /* 欢迎页面 */
    .welcome-page {
        padding: 16px;
    }

    .welcome-title {
        font-size: 22px;
    }

    .welcome-desc {
        font-size: 14px;
        margin-bottom: 20px;
    }

    .suggestion-cards {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .suggestion-card {
        padding: 12px;
    }

    .card-title {
        font-size: 13px;
    }

    .card-desc {
        font-size: 12px;
    }

    /* 消息区域 */
    .message {
        padding: 10px 12px;
        gap: 10px;
    }

    .message-avatar {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }

    .message-role {
        font-size: 11px;
    }

    .message-text {
        font-size: 14px;
    }

    /* 功能开关栏 */
    .feature-toggles {
        gap: 6px;
        margin-bottom: 8px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .quick-model-select {
        min-width: 100px;
        max-width: 120px;
        font-size: 12px;
        padding: 5px 8px;
    }

    .toggle-btn {
        padding: 5px 10px;
        font-size: 12px;
        gap: 4px;
    }

    .toggle-btn svg {
        width: 14px;
        height: 14px;
    }

    /* 输入区域 */
    .input-area {
        padding: 0 10px 10px;
    }

    .input-container {
        border-radius: 12px;
    }

    .input-wrapper {
        padding: 10px;
        gap: 6px;
    }

    .attach-btn {
        padding: 6px;
    }

    .attach-btn svg {
        width: 18px;
        height: 18px;
    }

    .message-input {
        font-size: 14px;
    }

    .send-btn, .stop-btn {
        padding: 6px;
    }

    .send-btn svg, .stop-btn svg {
        width: 18px;
        height: 18px;
    }

    .input-footer {
        padding: 0 10px 6px;
        font-size: 11px;
    }

    .input-hint {
        display: none;
    }

    /* 文件预览 */
    .file-preview {
        padding: 8px;
        gap: 6px;
    }

    .file-item {
        padding: 6px 8px;
        font-size: 12px;
    }

    /* 设置弹窗 */
    .modal {
        width: 95%;
        max-height: 85vh;
        background-color: #ffffff;
        border-radius: 16px;
    }

    .modal-overlay {
        background-color: rgba(0, 0, 0, 0.6);
    }

    .modal-header {
        padding: 14px 16px;
        background-color: #ffffff;
        border-bottom: 1px solid #e5e7eb;
    }

    .modal-header h2 {
        font-size: 16px;
        color: #111827;
    }

    .modal-close {
        color: #6b7280;
    }

    .modal-body {
        padding: 16px;
        background-color: #ffffff;
    }

    .settings-tabs {
        gap: 4px;
        margin-bottom: 16px;
        border-bottom: 1px solid #e5e7eb;
    }

    .tab-btn {
        padding: 6px 12px;
        font-size: 13px;
        color: #6b7280;
        background-color: transparent;
    }

    .tab-btn.active {
        color: #4f46e5;
        background-color: #eef2ff;
    }

    .tab-panel {
        background-color: #ffffff;
    }

    .form-group {
        margin-bottom: 14px;
    }

    .form-label {
        font-size: 13px;
        margin-bottom: 6px;
        color: #111827;
    }

    .form-input, .form-select, .form-textarea {
        padding: 8px 10px;
        font-size: 13px;
        background-color: #ffffff;
        border: 1px solid #e5e7eb;
        color: #111827;
    }

    .form-hint {
        font-size: 11px;
        color: #9ca3af;
    }

    .api-status {
        background-color: #f9fafb;
        border: 1px solid #e5e7eb;
    }

    .btn-group {
        gap: 8px;
        margin-top: 14px;
    }

    .btn {
        padding: 8px 14px;
        font-size: 13px;
    }

    .btn-primary {
        background-color: #4f46e5;
        color: #ffffff;
    }

    .btn-secondary {
        background-color: #f3f4f6;
        color: #111827;
    }

    .model-item {
        background-color: #f9fafb;
        border: 1px solid #e5e7eb;
    }

    .model-item-name {
        color: #111827;
    }

    .model-item-id {
        color: #6b7280;
    }

    .badge {
        background-color: #eef2ff;
        color: #4f46e5;
    }

    .slider-group {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .form-slider {
        flex: 1;
        background: #e5e7eb;
    }

    .form-slider::-webkit-slider-thumb {
        background: #4f46e5;
    }

    .slider-value {
        color: #111827;
    }

    /* 搜索结果 */
    .search-results-container {
        margin-top: 8px;
    }

    .search-results-header {
        padding: 8px 10px;
        font-size: 12px;
    }

    .search-result-item {
        padding: 8px;
    }

    .search-result-index {
        width: 20px;
        height: 20px;
        font-size: 11px;
    }

    .search-result-title {
        font-size: 13px;
    }

    .search-result-source {
        font-size: 11px;
    }

    .search-result-summary {
        font-size: 11px;
    }

    /* 思考过程 */
    .reasoning-header {
        padding: 8px 10px;
        font-size: 12px;
    }

    .reasoning-body {
        padding: 10px;
        font-size: 12px;
    }

    /* 模型列表 */
    .model-item {
        padding: 10px;
    }

    .model-item-name {
        font-size: 13px;
    }

    .model-item-id {
        font-size: 11px;
    }

    .badge {
        font-size: 10px;
        padding: 1px 6px;
    }

    /* 代码块 */
    .code-header {
        padding: 6px 10px;
    }

    .code-lang {
        font-size: 11px;
    }

    .copy-code-btn {
        font-size: 11px;
    }

    .message-text pre {
        padding: 10px;
        margin: 8px 0;
    }

    .message-text pre code {
        font-size: 12px;
    }

    /* 消息操作按钮 */
    .message-actions {
        gap: 4px;
        margin-top: 8px;
    }

    .message-action-btn {
        padding: 4px 8px;
        font-size: 11px;
    }
}

/* 小屏幕手机优化 */
@media (max-width: 375px) {
    .feature-toggles {
        gap: 4px;
    }

    .quick-model-select {
        min-width: 80px;
        font-size: 11px;
    }

    .toggle-btn {
        padding: 4px 8px;
        font-size: 11px;
    }

    .toggle-btn span {
        display: none;
    }

    .suggestion-cards {
        gap: 8px;
    }

    .suggestion-card {
        padding: 10px;
    }
}

/* ============= 滚动条样式 ============= */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-tertiary);
}

/* ============= 搜索结果样式 ============= */
.search-results {
    margin-top: 12px;
    padding: 12px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 13px;
}

.search-results-title {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.search-result-item {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item a {
    color: var(--primary-color);
    text-decoration: none;
}

.search-result-item a:hover {
    text-decoration: underline;
}

/* ============= 思考内容样式 ============= */
.reasoning-content {
    margin-bottom: 12px;
    border: 1px solid #e0e7ff;
    border-radius: var(--radius-md);
    background-color: #f5f7ff;
    overflow: hidden;
}

.reasoning-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background-color: #e8ecff;
    cursor: pointer;
    user-select: none;
    color: #4f46e5;
    font-size: 13px;
    font-weight: 500;
}

.reasoning-header:hover {
    background-color: #dde3ff;
}

.reasoning-header .collapse-icon {
    margin-left: auto;
    transition: transform 0.2s ease;
}

.reasoning-content.collapsed .collapse-icon {
    transform: rotate(-90deg);
}

.reasoning-body {
    padding: 12px 14px;
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-secondary);
    border-top: 1px solid #e0e7ff;
}

.reasoning-content.collapsed .reasoning-body {
    display: none;
}

.reasoning-body p {
    margin-bottom: 8px;
}

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

.reasoning-body code {
    background-color: #e8ecff;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
}

/* ============= 搜索结果样式 ============= */
.search-results-container {
    margin-top: 12px;
    border: 1px solid #e0e7ff;
    border-radius: var(--radius-md);
    background-color: #f8f9ff;
    overflow: hidden;
}

.search-results-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background-color: #e8ecff;
    color: #4f46e5;
    font-size: 13px;
    font-weight: 500;
}

.search-results-list {
    padding: 8px;
}

.search-result-item {
    display: flex;
    gap: 10px;
    padding: 10px;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s;
}

.search-result-item:hover {
    background-color: #e8ecff;
}

.search-result-index {
    width: 24px;
    height: 24px;
    background-color: #4f46e5;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
}

.search-result-content {
    flex: 1;
    min-width: 0;
}

.search-result-title {
    font-size: 14px;
    font-weight: 500;
    color: #4f46e5;
    text-decoration: none;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.search-result-title:hover {
    text-decoration: underline;
}

.search-result-source {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.search-result-summary {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
    line-height: 1.5;
}

/* ============= 版本切换样式 ============= */
.version-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 12px;
    padding: 8px 12px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.version-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--bg-color);
    cursor: pointer;
    color: var(--text-primary);
    transition: var(--transition);
}

.version-btn:hover:not(:disabled) {
    background-color: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.version-count {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: center;
}