/* ==========================================================================
   1. 基础样式
   ========================================================================== */


/* 通用按钮样式 */
.ai-btn {
    height: 36px;
    padding: 0 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    background: white;
    color: #64748b;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.ai-btn:hover {
    background: #f8fafc;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* 通用输入框样式 */
.ai-textarea {
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.6;
    color: #1e293b;
    resize: none;
    border: 1px solid #e5e7eb;
    background: white;
    padding: 0.5rem;
    border-radius: 6px;
}

.ai-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.1);
}

/* 通用下拉框样式 */
.ai-select {
    height: 36px;
    padding: 0 2rem 0 0.75rem;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    font-size: 0.875rem;
    background-color: white;
    cursor: pointer;
}

.ai-select:hover {
    border-color: var(--primary-color);
    background-color: #f8fafc;
}

.ai-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.1);
}

.ai-select option {
    padding: 8px;
    font-size: 14px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--background-color);
    font-size: var(--font-size-md);
}

.container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ==========================================================================
   2. 侧边栏样式
   ========================================================================== */

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-light);
    transition: all var(--transition-normal);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
}

.sidebar-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
    width: 100%;
}

.sidebar.full .sidebar-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.sidebar.full .logo {
    width: auto;
}

.logo-full {
    height: 4rem;
    width: auto;
}

.logo-icon {
    height: 2.5rem;
    width: 2.5rem;
    display: none;
}

.sidebar-toggle {
    width: 32px;
    height: 32px;
    background: var(--bg-lighter);
    border: none;
    border-radius: var(--border-radius-md);
    color: var(--text-color-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.sidebar.full .sidebar-toggle {
    margin-left: var(--spacing-sm);
}

.sidebar.icon .sidebar-toggle {
    margin: var(--spacing-lg) auto 0;
}

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

.sidebar-toggle i {
    font-size: var(--font-size-sm);
    transition: transform var(--transition-normal);
}

.sidebar.icon .sidebar-toggle i {
    transform: rotate(180deg);
}

.theme-toggle {
    width: 32px;
    height: 32px;
    background: #f1f5f9;
    border: none;
    border-radius: 8px;
    color: #64748b;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
}

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

.theme-toggle i {
    font-size: var(--font-size-lg);
}

.nav-container {
    display: flex;
    flex-direction: column;
    padding: 0;
}

.nav-link {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    border-radius: var(--border-radius-md);
    color: var(--text-color-light);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.nav-link i {
    font-size: var(--font-size-lg);
    margin-right: var(--spacing-md);
}

.nav-link:hover,
.nav-link.active {
    background-color: var(--hover-color);
    color: var(--primary-color);
}

.tools-section {
    margin-top: var(--spacing-xl);
    padding: 0;
}

.tools-title {
    padding: 0 var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    color: var(--text-color-light);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tools-title i {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
}

/* 侧边栏状态样式 */
.sidebar.full {
    width: var(--sidebar-width);
    padding: var(--spacing-lg);
}

.sidebar.icon {
    width: var(--sidebar-width-collapsed);
    padding: var(--spacing-lg) 0;
}

/* 图标模式下的样式调整 */
.sidebar.icon .sidebar-header,
.sidebar.icon .tools-title {
    padding: 0;
    justify-content: center;
}

.sidebar.icon .logo {
    padding: 0 var(--spacing-sm);
}

.sidebar.icon .nav-link {
    justify-content: center;
    padding: var(--spacing-md) 0;
}

.sidebar.icon .nav-link i,
.sidebar.icon .tools-title i {
    margin: 0;
    font-size: var(--font-size-xl);
}

.sidebar.icon .nav-text,
.sidebar.icon .tools-title span {
    display: none;
}

/* Logo 显示控制 */
.sidebar.full .logo-full,
.sidebar.icon .logo-icon {
    display: block;
}

.sidebar.full .logo-icon,
.sidebar.icon .logo-full {
    display: none;
}

.sidebar.icon .logo-icon {
    margin: 0 auto;
}

/* ==========================================================================
   3. 主内容区域样式
   ========================================================================== */

.main-content {
    margin-left: var(--sidebar-width);
    transition: margin-left var(--transition-normal);
    flex: 1;
    min-height: 100vh;
    position: relative;
}

.sidebar.icon ~ .main-content {
    margin-left: var(--sidebar-width-collapsed);
}

/* 欢迎页面样式 */
.welcome-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: calc(var(--spacing-xl) * 6) var(--spacing-lg);
    text-align: center;
}

.welcome-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: calc(var(--spacing-xl) * 2);
}

.welcome-logo {
    width: 8rem;
    height: 8rem;
    flex-shrink: 0;
    object-fit: contain;
}

.welcome-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.welcome-text span {
    font-size: var(--font-size-xl);
    color: var(--text-color);
    font-weight: bold;
}

.welcome-subtitle {
    color: var(--text-color-light);
    font-size: var(--font-size-lg);
    margin: 0;
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
}

.feature-card {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-card i {
    font-size: calc(var(--font-size-xl) * 1.2);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-color-light);
    font-size: var(--font-size-sm);
}

.chat-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.chat-topic {
    position: sticky;
    top: 0;
    z-index: 10;
    width: 100%;
    padding: var(--spacing-lg) 0;
    background-color: var(--background-color);
}

.topic-content {
    max-width: 400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--bg-light);
    border-radius: var(--border-radius-md);
    text-align: center;
    transition: all var(--transition-normal);
}

.topic-text {
    font-size: var(--font-size-md);
    font-weight: 500;
    color: var(--text-color);
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    height: calc(100vh - var(--header-height));
}

.message-area {
    overflow-y: auto;
    flex: 1;
    padding: 1rem;
}

.message-content {
    max-width: 800px;
    padding: 16px 20px;
    background: var(--background-color);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    overflow-wrap: break-word;
    word-break: break-word;
}

.message-content ul,
.message-content ol {
    padding-left: 24px;
    margin: 8px 0;
}

.message-content li {
    margin: 4px 0;
}

.user-message, .bot-message {
    display: flex;
    margin-bottom: 24px;
    width: 100%;
    align-items: flex-start;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    transform: translateY(20px);
    animation: messageAppear 0.3s ease forwards;
    gap: 16px;
}

.user-message {
    justify-content: flex-end;
}

.bot-message {
    justify-content: flex-start;
}

.user-message .message-content {
    background: var(--bg-lighter);
    border: 1px solid var(--border-color);
}

.bot-message .message-content {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #E0E7FF;
    color: var(--primary-color);
}

.user-avatar {
    background: #EEF2FF;
    color: var(--primary-color);
}

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

.input-area {
    position: sticky;
    bottom: 0;
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    z-index: 100;
    background-color: var(--background-color);
}

.input-wrapper {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.input-area textarea {
    width: 100%;
    height: 140px;
    min-height: 140px;
    max-height: 300px;
    padding: 16px;
    padding-right: 120px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background-color: var(--bg-lightest);
    color: var(--text-color);
    resize: none;
    font-size: 14px;
    line-height: 1.5;
    transition: all 0.3s ease;
    font-family: inherit;
}

.input-area textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    background-color: var(--background-color);
}

.input-area textarea::placeholder {
    color: var(--text-color-lighter);
}

.model-selector {
    position: absolute;
    bottom: 12px;
    left: 16px;
}

.model-selector select {
    background-color: var(--bg-lighter);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 4px 8px;
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

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

.model-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--bg-lightest);
}

.input-area .action-buttons {
    position: absolute;
    right: 12px;
    bottom: 12px;
    display: flex;
    gap: 8px;
    align-items: center;
}

.input-area .feature-button {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 8px;
    background-color: transparent;
    color: #64748b;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.input-area .feature-button:hover {
    background-color: #f1f5f9;
    color: var(--primary-color);
}

.input-area button {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 8px;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.input-area button:hover {
    background-color: var(--primary-color-dark);
}

.input-area button:disabled {
    background-color: #e5e7eb;
    cursor: not-allowed;
    opacity: 0.7;
}

.input-footer {
    max-width: 900px;
    margin: 8px auto 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 4px;
}

.input-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    gap: 12px;
}

textarea {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    resize: none;
    height: 56px;
    font-family: inherit;
    font-size: 14px;
    line-height: 1.5;
    transition: all 0.2s;
}

button {
    padding: 0 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.error-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: #fee2e2;
    border: 1px solid #fca5a5;
    padding: 12px 20px;
    border-radius: 8px;
    display: none;
    align-items: center;
    gap: 12px;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.error-toast button {
    height: 32px;
    background: #ef4444;
    font-size: 14px;
    padding: 0 12px;
}

/* 加载动画 */
.loading-spinner {
    width: 24px;
    height: 24px;
    position: relative;
}

.loading-spinner .circular {
    animation: rotate 2s linear infinite;
    transform-origin: center center;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
}

.loading-spinner .path {
    stroke: var(--primary-color);
    stroke-linecap: round;
    animation: dash 1.5s ease-in-out infinite;
}

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

@keyframes dash {
    0% {
        stroke-dasharray: 1, 150;
        stroke-dashoffset: 0;
    }
    50% {
        stroke-dasharray: 90, 150;
        stroke-dashoffset: -35;
    }
    100% {
        stroke-dasharray: 90, 150;
        stroke-dashoffset: -124;
    }
}

/* 消息动画效果 */
.message {
    opacity: 0;
    transform: translateY(20px);
    animation: messageAppear 0.3s ease forwards;
}

@keyframes messageAppear {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 工具区域样式 */
.tools-section {
    margin-top: 2rem;
    padding: 0 1rem;
}

.tools-title {
    font-size: 1rem;
    color: #64748b;
    margin-bottom: 1rem;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tools-title i {
    font-size: 1.1rem;
    color: var(--primary-color);
}

.tools-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tools-list .nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: #64748b;
    text-decoration: none;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.tools-list .nav-link i {
    font-size: 1.1rem;
    margin-right: 0.75rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 260px; /* 保持完整宽度 */
    }

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

    .sidebar.show::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: -1;
    }

    .main-content {
        margin-left: 0 !important;
    }

    .mobile-menu-btn {
        display: flex;
        position: fixed;
        top: 1rem;
        left: 1rem;
        z-index: 1001;
    }

    .sidebar-header {
        padding: 0;
        text-align: center;
    }

    .sidebar-header .logo img {
        content: url("/assets/images/logo.png");
        width: auto;
        height: 5rem;
    }

    .nav-list .nav-link {
        padding: 0.75rem 0;
        justify-content: center;
    }

    .nav-list .nav-link i {
        margin-right: 0;
        font-size: 1.25rem;
    }

    .nav-list .nav-text {
        display: none;
    }

    .tools-section {
        padding: 0;
    }

    .tools-title {
        padding: 0;
        justify-content: center;
    }

    .tools-title span {
        display: none;
    }

    .tools-title i {
        margin: 0;
        font-size: 1.25rem;
    }

    .tools-list .nav-link {
        padding: 0.75rem 0;
        justify-content: center;
    }

    .tools-list .nav-link i {
        margin-right: 0;
        font-size: 1.25rem;
    }

    .nav-text,
    .tools-list .nav-text {
        display: none;
    }

    .nav-link:hover::after,
    .tools-list .nav-link:hover::after {
        content: attr(title);
        position: absolute;
        left: 100%;
        top: 50%;
        transform: translateY(-50%);
        background: rgba(0, 0, 0, 0.8);
        color: white;
        padding: 0.5rem 0.75rem;
        border-radius: 4px;
        font-size: 0.875rem;
        white-space: nowrap;
        z-index: 1000;
        margin-left: 0.75rem;
        pointer-events: none;
    }
}

/* 修复欢迎界面响应式布局 */
@media (max-width: 768px) {
    .welcome-screen {
        padding: 1rem;
    }

    .welcome-header {
        flex-direction: column;
        text-align: center;
        margin-bottom: 2rem;
    }

    .welcome-logo {
        width: 6rem;
        height: 6rem;
    }

    .welcome-text span {
        font-size: 1.25rem;
        line-height: 1.4;
    }

    .welcome-subtitle {
        font-size: 1rem;
    }

    .feature-cards {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0 1rem;
        margin-bottom: 2rem;
    }

    .feature-card {
        padding: 1rem;
    }

    .feature-card i {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }

    .feature-card h3 {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }

    .feature-card p {
        font-size: 0.875rem;
    }

    .input-area {
        padding: 1rem;
    }

    textarea {
        font-size: 0.875rem;
        padding: 0.75rem;
        padding-right: 100px;
    }

    .action-buttons {
        right: 8px;
        bottom: 8px;
    }

    .model-selector {
        bottom: 8px;
        left: 8px;
    }

    .model-selector select {
        font-size: 0.75rem;
    }
}

/* AI 头像样式 */
.bot-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.bot-avatar.loading img.rotating-avatar {
    animation: rotate 2s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.bot-avatar {
    background: white;
    padding: 0;
    overflow: hidden;
}

.bot-avatar.loading {
    background: white;
    border: none;
}

.loading-spinner,
.status-indicator {
    display: none !important;
}

.message-think-block {
    width: 100%;
}

.message-content-wrapper {
    margin-top: 12px;
    position: relative;
}

.message-content-wrapper.hidden {
    display: none;
}

.view-think-process {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-lighter);
    border-radius: 16px;
    cursor: pointer;
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 8px;
    transition: all 0.2s ease;
}

.view-think-process:hover {
    background: var(--hover-color);
}

.view-think-process i {
    font-size: 12px;
}

.think-block {
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background: var(--background-color);
}

.think-header {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-light);
    cursor: pointer;
    user-select: none;
    gap: 8px;
    color: var(--text-color-light);
}

.think-header i.fa-brain {
    color: var(--primary-color);
    font-size: 14px;
}

.think-header .thinking-text {
    flex: 1;
    font-size: 14px;
}

.thinking-text .dots::after {
    content: '.';
    display: inline-block;
    animation: thinking 3s infinite;
}

@keyframes thinking {
    0%, 100% { content: '.'; }
    25% { content: '..'; }
    50% { content: '...'; }
    75% { content: '....'; }
}

.think-header i.fa-chevron-down {
    margin-left: auto;
    transition: transform 0.3s ease;
}

.think-block.collapsed .think-header i.fa-chevron-down {
    transform: rotate(180deg);
}

.think-block .think-content {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    white-space: pre-wrap;
    transition: all 0.3s ease;
    max-height: 300px;
    overflow-y: auto;
    background: var(--bg-light);
    scrollbar-width: thin;
    scrollbar-color: var(--text-color-lighter) transparent;
}

.think-block .think-content::-webkit-scrollbar {
    width: 6px;
}

.think-block .think-content::-webkit-scrollbar-track {
    background: transparent;
}

.think-block .think-content::-webkit-scrollbar-thumb {
    background-color: var(--text-color-lighter);
    border-radius: 3px;
}

.think-block .think-content::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-color-light);
}

.think-block.collapsed .think-content {
    max-height: 0;
    padding: 0 16px;
    border-top: none;
    overflow: hidden;
}

.waiting-message {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #6b7280;
    font-size: 14px;
}

.waiting-message i {
    font-size: 12px;
    color: var(--primary-color);
}

.message-content code.inline-code {
    background: #f3f4f6;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
}

.message-content pre.code-block {
    background: #f8fafc;
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 12px 0;
    border: 1px solid #e5e7eb;
}

.message-content pre.code-block code {
    font-family: monospace;
    white-space: pre;
}

.message-content h1, 
.message-content h2, 
.message-content h3 {
    margin: 16px 0 8px;
    color: #1e293b;
}

.message-content p {
    margin: 8px 0;
}

.message-content ul,
.message-content ol {
    margin: 8px 0;
    padding-left: 24px;
}

.message-content li {
    margin: 4px 0;
}

.message-content strong {
    font-weight: 600;
    color: #1e293b;
}

.message-content em {
    font-style: italic;
    color: #4b5563;
}

.message-toolbar {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
    color: var(--text-color-light);
    min-width: 400px;
}

.toolbar-left {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

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

.toolbar-right {
    display: flex;
    gap: var(--spacing-sm);
}

.toolbar-btn {
    background: none;
    border: none;
    color: var(--text-color-light);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

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

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

.message-content pre {
    white-space: pre-wrap;
    font-family: monospace;
    background: #f8fafc;
    padding: 12px;
    border-radius: 6px;
    margin: 0;
    font-size: 13px;
}

.tool-error-toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #fee2e2;
    border: 1px solid #fecaca;
    border-radius: 8px;
    padding: 12px 20px;
    z-index: 2000;
    animation: slideUp 0.3s ease-out;
}

.tool-error-toast .error-content {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #dc2626;
}

.tool-error-toast i {
    font-size: 16px;
}

@keyframes slideUp {
    from {
        transform: translate(-50%, 100%);
        opacity: 0;
    }
    to {
        transform: translate(-50%, 0);
        opacity: 1;
    }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
    transition: all 0.3s ease-out;
}

[data-theme="dark"] .loading-overlay {
    background: rgba(15, 23, 42, 0.95);
}

.loading-overlay.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
    padding: 2rem;
}

.loading-progress {
    width: 120px;
    height: 120px;
    position: relative;
}

.loading-circle {
    width: 100%;
    height: 100%;
    border: 3px solid #e2e8f0;
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: loading-spin 1s linear infinite;
    transition: border-color 0.3s ease;
}

[data-theme="dark"] .loading-circle {
    border-color: #1e293b;
    border-top-color: var(--primary-color);
}

.loading-percentage {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.loading-text {
    font-size: 1.125rem;
    color: #1e293b;
    font-weight: 500;
    transition: color 0.3s ease;
}

[data-theme="dark"] .loading-text {
    color: #e2e8f0;
}

.loading-subtext {
    font-size: 0.875rem;
    color: #64748b;
    max-width: 300px;
    transition: color 0.3s ease;
}

[data-theme="dark"] .loading-subtext {
    color: #94a3b8;
}

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

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: #64748b;
    text-decoration: none;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.nav-link i {
    font-size: 1.1rem;
    margin-right: 0.75rem;
}

.sidebar.icon .nav-link {
    padding: 0.75rem 0;
    justify-content: center;
}

.sidebar.icon .nav-link i {
    margin-right: 0;
    font-size: 1.25rem;
}

.sidebar.icon .nav-text,
.sidebar.icon .tools-title span {
    display: none;
}

.main-content {
    margin-left: var(--sidebar-width);
    transition: margin-left 0.3s ease;
}

.sidebar.icon ~ .main-content {
    margin-left: 60px;
}

@media (max-width: 550px) {
    .main-content {
        margin-left: 0 !important; /* 强制移除小屏幕下的所有边距 */
        padding: 4rem 1rem 1rem 1rem; /* 增加顶部间距 */
    }
    
    .sidebar.show::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.3);
        z-index: -1;
    }

    .welcome-screen {
        padding-top: 3rem; /* 增加顶部间距 */
    }

    .chat-screen {
        padding-top: 3rem; /* 增加顶部间距 */
    }
}

.tools-section {
    margin-top: 2rem;
    padding: 0;
}

.tools-title {
    font-size: 1rem;
    color: #64748b;
    margin-bottom: 1rem;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tools-title i {
    font-size: 1.1rem;
    color: var(--primary-color);
}

.sidebar.icon .tools-section {
    padding: 0;
}

.sidebar.icon .tools-title {
    padding: 0;
    justify-content: center;
}

.sidebar.icon .tools-title i {
    margin: 0;
    font-size: 1.25rem;
}

.sidebar.icon .tools-title span {
    display: none;
}

@media (max-width: 800px) {
    .tools-section {
        padding: 0;
    }

    .tools-title {
        padding: 0;
        justify-content: center;
    }

    .tools-title i {
        margin: 0;
        font-size: 1.25rem;
    }

    .tools-title span {
        display: none;
    }
}

.expand-sidebar {
    width: 32px;
    height: 32px;
    background: #f1f5f9;
    border: none;
    border-radius: 8px;
    color: #64748b;
    cursor: pointer;
    display: none; /* 默认隐藏 */
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    transition: all 0.2s;
}

.expand-sidebar:hover {
    background: #e2e8f0;
    color: #1e293b;
}

.expand-sidebar i {
    font-size: 0.875rem;
    transform: rotate(180deg);
}

.sidebar.icon .expand-sidebar {
    display: flex;
}

.nav-container {
    display: flex;
    flex-direction: column;
    padding: 0;
}

.sidebar.icon .nav-container {
    padding: 0;
}

@media (max-width: 550px) {
    .mobile-menu-btn {
        display: flex !important; /* 强制显示菜单按钮 */
    }

    .feature-cards {
        display: none;
    }

    .welcome-screen {
        padding-top: 4rem;
    }

    .welcome-header {
        margin-bottom: 2rem;
    }

    .welcome-logo {
        width: 5rem;
        height: 5rem;
    }

    .welcome-text span {
        font-size: 1.125rem;
    }

    .welcome-subtitle {
        font-size: 0.875rem;
    }

    .input-area {
        margin-top: 2rem;
    }

    .sidebar.show {
        transform: translateX(0);
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    }

    .main-content {
        margin-left: 0 !important;
        padding: 1rem;
        padding-top: 4rem; /* 为顶部菜单按钮留出空间 */
    }
}

.nav-list,
.tools-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-menu-btn {
    position: fixed;
    top: 1rem;
    left: 1rem;
    width: 40px;
    height: 40px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    cursor: pointer;
    display: none; /* 默认隐藏 */
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: all 0.2s;
}

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

.mobile-menu-btn i {
    font-size: 1.25rem;
}

@media (max-width: 550px) {
    .mobile-menu-btn {
        display: flex; /* 在小屏幕下显示 */
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .sidebar.show {
        transform: translateX(0);
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.3);
        z-index: 999;
    }

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

@media (min-width: 769px) and (max-width: 1024px) {
    .sidebar {
        width: 60px;
        padding: 1rem 0;
    }

    .sidebar .logo-full {
        display: none;
    }

    .sidebar .logo-icon {
        display: block;
    }

    .sidebar .nav-text,
    .sidebar .tools-title span {
        display: none;
    }

    .main-content {
        margin-left: 60px;
    }
}

@media (min-width: 1025px) {
    .sidebar.full {
        width: var(--sidebar-width);
    }

    .sidebar.icon {
        width: 60px;
    }

    .main-content {
        margin-left: var(--sidebar-width);
    }

    .sidebar.icon ~ .main-content {
        margin-left: 60px;
    }
}

.sidebar,
.main-content,
.nav-link,
.tools-title {
    transition: all 0.3s ease;
}

@media (max-width: 768px) {
    .input-area {
        padding: 0.75rem;
    }

    .welcome-screen .input-area {
        height: auto;
        padding: 0.75rem;
    }

    .welcome-screen textarea {
        height: 140px; /* 保持与默认高度一致 */
        min-height: 140px;
        padding: 12px;
        padding-right: 100px;
        font-size: 14px;
    }

    .chat-screen .input-area {
        height: auto;
    }

    .chat-screen textarea {
        height: 140px; /* 保持与默认高度一致 */
        min-height: 140px;
        padding: 12px;
        padding-right: 100px;
        font-size: 14px;
    }

    .model-selector {
        bottom: 8px;
        left: 12px;
    }

    .model-selector select {
        font-size: 12px;
        padding: 4px 8px;
    }

    .action-buttons {
        bottom: 8px;
        right: 12px;
    }

    .action-buttons button {
        width: 28px;
        height: 28px;
    }

    .action-buttons i {
        font-size: 12px;
    }
}

@media (max-width: 350px) {
    .input-area {
        padding: 0.5rem;
    }

    textarea {
        padding: 10px;
        padding-right: 90px;
        font-size: 13px;
    }

    .model-selector select {
        font-size: 11px;
        padding: 3px 6px;
    }

    .action-buttons button {
        width: 24px;
        height: 24px;
    }
}

.welcome-screen .input-area {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    height: auto;
    border-top: none;
}

.chat-screen .input-area {
    position: sticky;
    bottom: 0;
    width: 100%;
}


/* 全屏模式样式 */
#ai-modal-content-writer.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100% !important;
    height: 100vh !important;
    max-width: none !important;
    border-radius: 0;
    margin: 0;
    padding: 24px;
}

/* 基础模态框样式 */
.ai-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.ai-modal-body{
    padding: 0.5rem 1.5rem;
}

.ai-modal-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.ai-modal-body textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.875rem;
    line-height: 1.5;
    color: #1e293b;
    resize: vertical;
    transition: all 0.2s;
}

.ai-modal-body textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(var(--primary-color-rgb), 0.1);
}

.ai-modal-body textarea::placeholder {
    color: #94a3b8;
}

.ai-modal-body .button-group {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

.ai-modal-body .button-group button {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.ai-modal-body .cancel-btn {
    background: white;
    border: 1px solid #e5e7eb;
    color: #64748b;
}

.ai-modal-body .cancel-btn:hover {
    border-color: #cbd5e1;
    color: #1e293b;
}

.ai-modal-body .submit-btn {
    background: var(--primary-color);
    border: 1px solid var(--primary-color);
    color: white;
}

.ai-modal-body .submit-btn:hover {
    opacity: 0.9;
}

.ai-modal-body .submit-btn:disabled {
    background: #e5e7eb;
    border-color: #e5e7eb;
    color: #94a3b8;
    cursor: not-allowed;
}


.ai-modal-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: #1e293b;
}

.ai-modal-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.ai-modal-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ai-modal-fullscreen-btn,
.ai-modal-close-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    background: white;
    color: #64748b;
    cursor: pointer;
    transition: all 0.2s;
}

.ai-modal-fullscreen-btn:hover,
.ai-modal-close-btn:hover {
    border-color: #cbd5e1;
    color: #1e293b;
}

.ai-modal-close-btn:hover {
    color: #ef4444;
    border-color: #fecaca;
}

.ai-modal-fullscreen-btn i,
.ai-modal-close-btn i {
    font-size: 1rem;
}

/* 全屏模式样式 */
.ai-modal-content {
    background: white;
    border-radius: 16px;
    width: 80%;
    height: 80vh;
    max-width: 1400px;
    position: relative;
    transition: all 0.3s ease;
}

.ai-modal-content.fullscreen {
    width: 100% !important;
    height: 100vh !important;
    max-width: none !important;
    border-radius: 0;
    margin: 0;
}