/* =============================================================
 * data-agent 独立页面样式（支持浅色/深色双主题）
 *
 * 设计原则：
 *   - 单一主色（蓝 #2563EB），避免紫青撞色
 *   - 浅色：白底 + 细微阴影做层次
 *   - 深色：中性深灰底（slate）+ 同一主色，非紫青撞色
 *   - 内容区 1200px，数据表格/图表更舒展
 *   - 字体：Inter（英）+ PingFang/思源黑体（中）
 *   - 主题切换：html[data-theme="dark"] 覆盖颜色变量
 * ============================================================= */

/* 主题无关变量（圆角 / 阴影） */
:root {
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.12);
}

/* ===================== 浅色主题（默认） ===================== */
:root {
    /* 主色 / 强调 */
    --primary-color: #2563EB;
    --primary-hover: #1D4ED8;
    --primary-light: #3B82F6;
    --primary-bg: #EFF6FF;
    --primary-bg-strong: #DBEAFE;
    --primary-border: #BFDBFE;

    /* 中性色（背景） */
    --bg-page: #F8FAFC;
    --bg-surface: #FFFFFF;
    --bg-muted: #F1F5F9;
    --bg-code: #F8FAFC;
    --bg-overlay: rgba(15, 23, 42, 0.55);

    /* 文字 */
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --text-inverse: #FFFFFF;

    /* 边框 */
    --border-color: #E2E8F0;
    --border-strong: #CBD5E1;

    /* 状态色 */
    --success-color: #059669;
    --success-bg: #ECFDF5;
    --success-border: #A7F3D0;
    --warning-color: #D97706;
    --warning-bg: #FFFBEB;
    --warning-border: #FDE68A;
    --danger-color: #DC2626;
    --danger-bg: #FEF2F2;
    --danger-border: #FECACA;
    --info-color: #2563EB;
    --info-bg: #EFF6FF;

    /* 代码语法（浅色） */
    --code-bg: #F8FAFC;
    --code-text: #0F172A;
    --code-keyword: #9333EA;
    --code-string: #16A34A;
    --code-comment: #64748B;
    --code-number: #EA580C;
}

/* ===================== 深色主题 ===================== */
[data-theme="dark"] {
    --primary-color: #3B82F6;
    --primary-hover: #60A5FA;
    --primary-light: #60A5FA;
    --primary-bg: rgba(59, 130, 246, 0.12);
    --primary-bg-strong: rgba(59, 130, 246, 0.22);
    --primary-border: rgba(59, 130, 246, 0.45);

    --bg-page: #0B1220;
    --bg-surface: #111827;
    --bg-muted: #1E293B;
    --bg-code: #0B1220;
    --bg-overlay: rgba(0, 0, 0, 0.75);

    --text-primary: #F1F5F9;
    --text-secondary: #CBD5E1;
    --text-muted: #64748B;
    --text-inverse: #0B1220;

    --border-color: #1E293B;
    --border-strong: #334155;

    --success-color: #34D399;
    --success-bg: rgba(16, 185, 129, 0.12);
    --success-border: rgba(16, 185, 129, 0.35);
    --warning-color: #FBBF24;
    --warning-bg: rgba(245, 158, 11, 0.12);
    --warning-border: rgba(245, 158, 11, 0.35);
    --danger-color: #F87171;
    --danger-bg: rgba(239, 68, 68, 0.12);
    --danger-border: rgba(239, 68, 68, 0.35);
    --info-color: #60A5FA;
    --info-bg: rgba(59, 130, 246, 0.12);

    --code-bg: #0B1220;
    --code-text: #E2E8F0;
    --code-keyword: #C084FC;
    --code-string: #4ADE80;
    --code-comment: #64748B;
    --code-number: #FB923C;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.55);
}

/* 主题切换图标按钮 */
.da-theme-toggle {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
    font-size: 14px;
}

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

.da-theme-toggle .icon-sun { display: none; }
.da-theme-toggle .icon-moon { display: inline-block; }
[data-theme="dark"] .da-theme-toggle .icon-sun { display: inline-block; }
[data-theme="dark"] .da-theme-toggle .icon-moon { display: none; }

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

html, body {
    height: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
        'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    font-size: 14.5px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* #da-app 布局见文件底部 flex 两栏定义 */

/* ===================== 顶栏 ===================== */
.da-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 16px 0 10px;
    height: 56px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    position: relative;
    z-index: 10;
}

.da-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 侧栏折叠按钮（参考 ChatGPT：纯图标，无边框无背景） */
.da-sidebar-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border: none;
    background: transparent;
    color: var(--text-secondary, #64748b);
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: all .15s;
    padding: 0;
}

.da-sidebar-toggle:hover {
    background: var(--bg-muted, rgba(15, 23, 42, 0.05));
    color: var(--text-primary, #1e293b);
}

.da-sidebar-toggle:active {
    transform: scale(0.92);
}

.da-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: var(--primary-color);
    color: var(--text-inverse);
    font-size: 14px;
}

.da-logo i {
    line-height: 1;
}

.da-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.da-badge {
    padding: 2px 8px;
    font-size: 11.5px;
    font-weight: 500;
    color: var(--primary-hover);
    background: var(--primary-bg);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-xs);
    margin-left: 4px;
}

.da-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.da-back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 34px;
    padding: 0 12px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    transition: all 0.15s;
}

.da-back-link:hover {
    color: var(--text-primary);
    border-color: var(--border-strong);
    background: var(--bg-muted);
}

/* ===================== 顶栏导航 ===================== */
.da-header-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 20px;
}

.da-nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 34px;
    padding: 0 12px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.15s;
}

.da-nav-link i {
    font-size: 13px;
}

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

.da-nav-link.active {
    color: var(--primary-color);
    background: var(--primary-bg);
}

/* ===================== 用户菜单 ===================== */
.da-user-menu {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    height: 36px;
    padding: 0 10px 0 6px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s;
}

.da-user-menu:hover {
    background: var(--bg-muted);
}

.da-user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
}

.da-user-name {
    font-size: 13.5px;
    color: var(--text-primary);
    font-weight: 500;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.da-user-menu .fa-chevron-down {
    font-size: 10px;
    color: var(--text-muted);
    transition: transform 0.2s;
}

.da-user-menu.open .fa-chevron-down {
    transform: rotate(180deg);
}

.da-user-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 240px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: all 0.18s;
    z-index: 100;
}

.da-user-menu.open .da-user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.da-user-info {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 6px;
}

.da-user-info-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.da-user-info-id {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
}

.da-user-info-meta {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-top: 8px;
}

.da-user-info-label {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 20px;
    flex-shrink: 0;
    width: 28px;
}

.da-user-info-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    flex: 1;
    min-width: 0;
}

.da-tag {
    display: inline-flex;
    align-items: center;
    font-size: 11px;
    line-height: 1;
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 500;
    white-space: nowrap;
}

.da-tag-role {
    background: var(--primary-color);
    color: #fff;
}

.da-tag-dept {
    background: var(--primary-bg);
    color: var(--primary-hover);
    border: 1px solid var(--primary-border);
    /* 部门路径较长，独占一行展示完整祖先链 */
    width: 100%;
    flex: 1 1 100%;
    justify-content: flex-start;
    white-space: normal;
    word-break: keep-all;
    line-height: 1.4;
    padding: 5px 8px;
}

.da-tag-empty {
    background: var(--bg-muted);
    color: var(--text-muted);
    font-weight: 400;
}

.da-user-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 8px 10px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 13.5px;
    font-weight: 500;
    border-radius: var(--radius-xs);
    cursor: pointer;
    transition: all 0.15s;
}

.da-user-dropdown-item:hover {
    background: var(--bg-muted);
    color: var(--text-primary);
}

.da-user-dropdown-item i {
    font-size: 13px;
    width: 16px;
    text-align: center;
}

/* ===================== 个人档案弹框（顶栏全局）===================== */
.da-profile-mask {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: da-fade-in 0.18s ease;
}
.da-profile-card {
    width: 440px;
    max-width: calc(100vw - 32px);
    background: var(--bg-surface, #fff);
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 14px;
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.22);
    overflow: hidden;
    animation: da-pop-in 0.22s ease;
}
.da-profile-header {
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.10), rgba(37, 99, 235, 0.02));
    border-bottom: 1px solid var(--border-color, #e2e8f0);
    display: flex;
    align-items: center;
    gap: 14px;
}
.da-profile-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-color, #2563EB);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 600;
    flex-shrink: 0;
}
.da-profile-header-text { flex: 1; min-width: 0; }
.da-profile-header-name {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary, #0F172A);
    margin-bottom: 2px;
}
.da-profile-header-id {
    font-size: 13px;
    color: var(--text-muted, #94A3B8);
}
.da-profile-close {
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-muted, #94A3B8);
    font-size: 16px;
    padding: 6px;
    border-radius: 6px;
}
.da-profile-close:hover { background: var(--bg-muted, #F1F5F9); color: var(--text-primary, #0F172A); }
.da-profile-body { padding: 16px 24px 20px; }
.da-profile-section-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted, #94A3B8);
    margin: 12px 0 8px;
    letter-spacing: 0.04em;
}
.da-profile-grid {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 8px 12px;
    font-size: 14px;
}
.da-profile-grid-label { color: var(--text-muted, #94A3B8); }
.da-profile-grid-value { color: var(--text-primary, #0F172A); word-break: break-all; }
.da-profile-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.da-profile-tag {
    padding: 2px 8px;
    border-radius: 6px;
    background: var(--bg-muted, #F1F5F9);
    color: var(--text-primary, #0F172A);
    font-size: 12px;
}
@keyframes da-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes da-pop-in {
    from { opacity: 0; transform: scale(0.96) translateY(-8px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

/* ===================== 主区 ===================== */
.da-main {
    flex: 1;
    overflow-y: auto;
    padding: 32px 0;
    scroll-behavior: smooth;
}

.da-main::-webkit-scrollbar {
    width: 8px;
}

.da-main::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 4px;
}

.da-main::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

/* 空状态 */
.da-empty {
    max-width: 860px;
    margin: 0 auto;
    padding: 60px 32px;
    text-align: center;
}

.da-empty-greeting {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 36px;
    letter-spacing: -0.02em;
}

.da-suggestions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px;
}

.da-suggestion-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 13.5px;
    line-height: 1.45;
    cursor: pointer;
    text-align: left;
    transition: all 0.18s ease;
    overflow: hidden;
}

.da-suggestion-item::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--suggestion-tone, var(--primary-color));
    opacity: 0.85;
    transition: width 0.18s ease;
}

.da-suggestion-item:hover {
    border-color: var(--suggestion-tone, var(--primary-color));
    background: var(--bg-surface);
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.06);
    transform: translateY(-1px);
}

.da-suggestion-item:hover::before {
    width: 5px;
}

.da-suggestion-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    flex-shrink: 0;
    border-radius: 8px;
    background: color-mix(in srgb, var(--suggestion-tone, var(--primary-color)) 12%, transparent);
    color: var(--suggestion-tone, var(--primary-color));
    font-size: 13px;
    transition: all 0.18s ease;
}

.da-suggestion-item:hover .da-suggestion-icon {
    background: var(--suggestion-tone, var(--primary-color));
    color: #fff;
}

.da-suggestion-text {
    flex: 1;
    min-width: 0;
    color: var(--text-primary);
    font-weight: 500;
}

.da-suggestion-arrow {
    color: var(--text-tertiary, #94a3b8);
    font-size: 11px;
    opacity: 0;
    transform: translateX(-4px);
    transition: all 0.18s ease;
}

.da-suggestion-item:hover .da-suggestion-arrow {
    opacity: 1;
    transform: translateX(0);
    color: var(--suggestion-tone, var(--primary-color));
}

/* 统一色调：主色蓝（与全局一致） */
.da-suggestion-item { --suggestion-tone: var(--primary-color, #2563eb); }

/* ===================== 消息 ===================== */
.da-messages {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

.da-msg {
    display: flex;
    gap: 14px;
    margin-bottom: 28px;
}

.da-avatar {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.da-avatar-user {
    background: var(--bg-muted);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.da-avatar-ai {
    background: var(--primary-color);
    color: var(--text-inverse);
}

.da-bubble-user {
    background: var(--bg-muted);
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14.5px;
    line-height: 1.6;
    max-width: 760px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* 用户消息体（含附件条 + 气泡）：与头像紧贴左侧 */
.da-user-body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

/* 用户消息附件缩略图条（在问题文字上方） */
.da-msg-attachments {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    max-width: 760px;
    justify-content: flex-start;
}

.da-msg-attachment {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    width: 76px;
    cursor: default;
    animation: da-file-card-in 0.22s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.da-msg-attachment.image {
    cursor: zoom-in;
}

.da-msg-attachment-thumb {
    width: 76px;
    height: 76px;
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-muted);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.18s, box-shadow 0.18s;
}

.da-msg-attachment.image .da-msg-attachment-thumb:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.12);
}

.da-msg-attachment-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.da-msg-attachment-thumb > i {
    color: var(--primary-color);
    font-size: 26px;
}

.da-msg-attachment-name {
    font-size: 11px;
    color: var(--text-muted);
    max-width: 76px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.da-assistant-body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ===================== 执行计划 ===================== */
.da-todo-inline {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.da-todo-inline-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 14px;
    background: var(--bg-muted);
    border-bottom: 1px solid var(--border-color);
    font-size: 13.5px;
}

.da-todo-inline-header > i {
    color: var(--primary-color);
}

.da-todo-inline-title {
    font-weight: 600;
    color: var(--text-primary);
}

.da-todo-count {
    padding: 2px 8px;
    font-size: 12px;
    color: var(--text-secondary);
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xs);
    margin-left: auto;
    font-variant-numeric: tabular-nums;
}

.da-todo-inline-body {
    padding: 6px 12px 8px;
}

.da-todo-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 6px;
    font-size: 13.5px;
    color: var(--text-secondary);
    border-left: 2px solid transparent;
    padding-left: 12px;
    margin-left: 2px;
    transition: all 0.2s;
}

.da-todo-item.in_progress {
    color: var(--text-primary);
    border-left-color: var(--warning-color);
    background: var(--warning-bg);
}

.da-todo-item.in_progress > i {
    color: var(--warning-color);
}

.da-todo-item.completed {
    color: var(--text-muted);
    text-decoration: line-through;
    text-decoration-color: var(--success-color);
    text-decoration-thickness: 1.5px;
}

.da-todo-item.completed > i {
    color: var(--success-color);
}

.da-todo-item.pending > i {
    color: var(--text-muted);
}

/* ===================== 时间线 ===================== */
.da-timeline {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding-left: 2px;
}

.da-timeline-item {
    display: flex;
    gap: 14px;
    position: relative;
    padding-bottom: 2px;
}

.da-timeline-item:not(:last-child)::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 16px;
    bottom: 0;
    width: 1px;
    background: var(--border-color);
}

.da-timeline-dot {
    flex-shrink: 0;
    width: 11px;
    height: 11px;
    margin-top: 7px;
    border-radius: 50%;
    border: 2px solid var(--bg-surface);
    box-shadow: 0 0 0 1px var(--border-strong);
    background: var(--text-muted);
    position: relative;
    z-index: 1;
}

.da-timeline-dot.thinking {
    background: var(--info-color);
    box-shadow: 0 0 0 1px var(--primary-border);
}

.da-timeline-dot.todo {
    background: var(--primary-color);
    box-shadow: 0 0 0 1px var(--primary-border);
}

.da-timeline-dot.text {
    background: #0891B2;
    box-shadow: 0 0 0 1px #67E8F9;
}

.da-timeline-dot.running {
    background: var(--warning-color);
    box-shadow: 0 0 0 1px var(--warning-border);
    animation: da-pulse-dot 1.2s ease-in-out infinite;
}

@keyframes da-pulse-dot {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

.da-timeline-dot.completed {
    background: var(--success-color);
    box-shadow: 0 0 0 1px var(--success-border);
}

.da-timeline-dot.failed,
.da-timeline-dot.error {
    background: var(--danger-color);
    box-shadow: 0 0 0 1px var(--danger-border);
}

.da-timeline-body {
    flex: 1;
    min-width: 0;
    padding-bottom: 6px;
}

/* thinking */
.da-thinking {
    background: var(--info-bg);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-md);
    padding: 10px 14px;
}

.da-thinking-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--info-color);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.da-thinking-text {
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.65;
    max-height: 240px;
    overflow-y: auto;
}

.da-thinking-text::-webkit-scrollbar {
    width: 6px;
}

.da-thinking-text::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 3px;
}

.da-thinking-text p {
    margin: 0;
}

/* text（LLM 文字输出卡片，正文产物）
 * 强化视觉：左侧主色竖条 + 细微阴影 + 加大内边距，让正文不再是白板 */
.da-text-item {
    position: relative;
    font-size: 14.5px;
    color: var(--text-primary);
    line-height: 1.75;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--primary-color);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.da-text-item p:first-child {
    margin-top: 0;
}

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

/* 流式输出态：主色高亮边框 + 末尾闪动光标 */
.da-text-item.is-streaming {
    border-color: var(--primary-border);
    box-shadow: var(--shadow-sm), 0 0 0 3px rgba(37, 99, 235, 0.08);
}

/* 光标挂在最后一个子元素末尾，紧跟文字而非另起一行 */
.da-text-item.is-streaming > :last-child::after {
    content: '';
    display: inline-block;
    width: 7px;
    height: 1em;
    margin-left: 4px;
    background: var(--primary-color);
    vertical-align: baseline;
    border-radius: 1px;
    animation: da-cursor-blink 1.06s steps(2) infinite;
}

@keyframes da-cursor-blink {
    0%, 50% { opacity: 1; }
    50.01%, 100% { opacity: 0; }
}

/* timeline item / 卡片首次出现时入场 */
.da-msg {
    animation: da-fade-in 0.25s ease-out both;
}

.da-timeline-item,
.da-chart-card,
.da-report-card,
.da-recommend {
    animation: da-fade-in-up 0.3s ease-out both;
}

@keyframes da-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes da-fade-in-up {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 入场动画尊重「减少动态效果」无障碍偏好 */
@media (prefers-reduced-motion: reduce) {
    .da-msg,
    .da-timeline-item,
    .da-chart-card,
    .da-report-card,
    .da-recommend,
    .da-text-item.is-streaming::after {
        animation: none;
    }
}

/* tool */
.da-tool {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    transition: all 0.15s;
}

.da-tool.completed {
    border-color: var(--success-border);
    background: var(--success-bg);
}

.da-tool.running {
    border-color: var(--warning-border);
    background: var(--warning-bg);
}

.da-tool.failed {
    border-color: var(--danger-border);
    background: var(--danger-bg);
}

.da-tool-icon {
    color: var(--text-muted);
}

.da-tool.completed .da-tool-icon { color: var(--success-color); }
.da-tool.running .da-tool-icon { color: var(--warning-color); }
.da-tool.failed .da-tool-icon { color: var(--danger-color); }

.da-tool-name {
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
    font-size: 12.5px;
}

.da-tool-status {
    display: inline-flex;
    align-items: center;
}

.da-tool.completed .da-tool-status { color: var(--success-color); }
.da-tool.running .da-tool-status { color: var(--warning-color); }
.da-tool.failed .da-tool-status { color: var(--danger-color); }

.da-tool-expand {
    margin-left: auto;
    padding: 3px 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xs);
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.15s;
}

.da-tool-expand:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: var(--primary-bg);
}

.da-tool-detail {
    width: 100%;
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.da-tool-section-label {
    font-size: 11.5px;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 5px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.da-tool-args {
    margin: 0;
    padding: 10px 12px;
    background: var(--bg-code);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    max-height: 240px;
    overflow: auto;
}

.da-tool-args code {
    font-family: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
    font-size: 12.5px;
    color: var(--text-primary);
    white-space: pre;
}

.da-tool-result {
    padding: 10px 12px;
    background: var(--bg-code);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.55;
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
}

/* error */
.da-error-item {
    display: flex;
    gap: 10px;
    padding: 10px 14px;
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    border-radius: var(--radius-md);
    font-size: 13.5px;
}

.da-error-item > i {
    color: var(--danger-color);
    margin-top: 2px;
}

.da-error-msg {
    color: var(--text-primary);
    font-weight: 600;
}

.da-error-detail {
    margin-top: 4px;
    color: var(--text-secondary);
    font-size: 12.5px;
    font-family: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
    word-break: break-all;
}

/* ===================== 卡片通用 ===================== */
.da-chart-card,
.da-report-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.da-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--bg-muted);
    border-bottom: 1px solid var(--border-color);
    font-size: 13.5px;
}

.da-card-header > i {
    color: var(--primary-color);
}

.da-card-title {
    font-weight: 600;
    color: var(--text-primary);
}

.da-card-meta {
    margin-left: auto;
    font-size: 12px;
    color: var(--text-secondary);
    padding: 2px 8px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xs);
}

.da-card-warn {
    margin-left: 8px;
    font-size: 12px;
    color: var(--warning-color);
    padding: 2px 8px;
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    border-radius: var(--radius-xs);
}

/* 图表卡片 */
.da-chart-img {
    display: block;
    width: 100%;
    max-height: 480px;
    object-fit: contain;
    background: #fff;
    cursor: zoom-in;
    border-top: 1px solid var(--border-color);
}

/* 报告卡片 */
.da-report-body {
    padding: 16px 20px;
    font-size: 14.5px;
    line-height: 1.7;
    color: var(--text-primary);
}

/* 加载中 */
.da-loading {
    display: flex;
    gap: 5px;
    padding: 8px 4px;
}

.da-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: da-bounce 1.4s ease-in-out infinite both;
}

.da-dot:nth-child(1) { animation-delay: -0.32s; }
.da-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes da-bounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
}

/* 推荐追问 */
.da-recommend {
    padding: 10px 14px;
    background: var(--bg-surface);
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius-md);
}

.da-recommend-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 600;
}

.da-recommend-items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.da-recommend-item {
    padding: 6px 12px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
}

.da-recommend-item:hover {
    border-color: var(--primary-color);
    background: var(--primary-bg);
    color: var(--primary-hover);
}

/* 操作 */
.da-actions {
    display: flex;
    gap: 4px;
    margin-top: 2px;
    opacity: 0;
    transition: opacity 0.15s;
}

.da-msg-assistant:hover .da-actions {
    opacity: 1;
}

.da-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    color: var(--text-muted);
    font-size: 12px;
    cursor: pointer;
    border-radius: var(--radius-xs);
    transition: all 0.15s;
}

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

/* ===================== 输入区 ===================== */
/* 滚到底部浮动按钮（用户上滑暂停自动跟随时显示） */
.da-scroll-bottom-btn {
    position: fixed;
    right: 40px;
    bottom: 160px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    box-shadow: var(--shadow-md);
    z-index: 50;
    transition: color 0.15s, border-color 0.15s, transform 0.15s;
    animation: da-fade-in 0.2s ease-out both;
}

.da-scroll-bottom-btn:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* 已上传文件卡片（输入框上方，缩略图 + 名称 + 状态） */
.da-file-chips {
    max-width: 1200px;
    margin: 0 auto 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.da-file-card {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    width: 268px;
    padding: 8px;
    background: var(--bg-surface);
    border: 1px solid var(--border-strong);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
    animation: da-file-card-in 0.22s cubic-bezier(0.16, 1, 0.3, 1) both;
    transition: box-shadow 0.18s, border-color 0.18s, transform 0.18s;
}

.da-file-card:hover {
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
    transform: translateY(-1px);
}

.da-file-card.failed {
    border-color: #FCA5A5;
    background: #FEF2F2;
}

@keyframes da-file-card-in {
    from { opacity: 0; transform: translateY(8px) scale(0.96); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* 缩略图区 */
.da-file-thumb {
    position: relative;
    flex: 0 0 56px;
    width: 56px;
    height: 56px;
    border-radius: 8px;
    overflow: hidden;
    background: var(--primary-bg, rgba(37, 99, 235, 0.08));
    display: flex;
    align-items: center;
    justify-content: center;
}

.da-file-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.da-file-thumb > i {
    color: var(--primary-color);
    font-size: 22px;
}

/* 成功角标（贴在缩略图右上角） */
.da-file-check {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 16px;
    height: 16px;
    background: #10B981;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    box-shadow: 0 1px 3px rgba(16, 185, 129, 0.4);
    border: 1.5px solid var(--bg-surface, #fff);
}

.da-file-card.image .da-file-thumb {
    background: #f1f5f9;
}

.da-file-card.image .da-file-thumb > i {
    display: none;
}

/* 上传中遮罩 + spinner */
.da-file-thumb-loading {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.da-file-thumb-failed {
    position: absolute;
    inset: 0;
    background: rgba(239, 68, 68, 0.85);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.da-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: da-spin 0.7s linear infinite;
}

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

/* 卡片信息 */
.da-file-meta {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.da-file-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary, #0f172a);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.da-file-sub {
    line-height: 1.4;
}

.da-file-status {
    font-size: 11.5px;
    color: var(--text-muted);
}

.da-file-status.failed {
    color: #EF4444;
    font-weight: 500;
}

.da-file-status.ready {
    color: var(--primary-color);
}

/* 移除按钮 */
.da-file-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 20px;
    height: 20px;
    border: none;
    background: rgba(15, 23, 42, 0.06);
    color: var(--text-secondary, #475569);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    opacity: 0;
    transition: opacity 0.15s, background 0.15s, color 0.15s;
}

.da-file-card:hover .da-file-remove {
    opacity: 1;
}

.da-file-remove:hover {
    background: #EF4444;
    color: #fff;
}

/* 拖拽高亮 */
.da-input-wrap.dragging {
    border-color: var(--primary-color);
    background: var(--primary-bg);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* 输入区（豆包式：透明 footer + 悬浮输入卡片 + 工具栏内嵌） */
.da-footer {
    padding: 8px 28px 14px;
    background: transparent;
    border-top: none;
}

.da-input-wrap {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--bg-surface);
    border: 1px solid var(--border-strong);
    border-radius: 18px;
    padding: 10px 12px 8px;
    transition: border-color 0.15s, box-shadow 0.15s;
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
}

.da-input-wrap:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 4px 24px rgba(37, 99, 235, 0.18);
}

.da-input-wrap textarea {
    width: 100%;
    padding: 6px 8px 2px;
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    color: var(--text-primary);
    font-size: 14.5px;
    font-family: inherit;
    line-height: 1.55;
    max-height: 200px;
}

.da-input-wrap textarea::placeholder {
    color: var(--text-muted);
}

/* 输入卡片底部工具栏：左工具按钮 + 右发送 */
.da-input-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 4px 0 2px;
}

.da-input-tools-left {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

/* 工具栏小药丸按钮（联网 / 文档 / DeepResearch / PPT） */
.da-tool-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    font-size: 13.5px;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    cursor: pointer;
    user-select: none;
    transition: all .15s;
}

.da-tool-btn i {
    font-size: 13.5px;
    opacity: .85;
}

.da-tool-btn:not(:disabled):hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-bg);
}

.da-tool-btn.active {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-bg);
    font-weight: 600;
}

.da-tool-btn:disabled,
.da-tool-btn.placeholder {
    opacity: .45;
    cursor: not-allowed;
}

.da-tool-btn.placeholder:hover {
    border-color: var(--border-color);
    color: var(--text-secondary);
    background: transparent;
}

[data-theme="dark"] .da-tool-btn.placeholder:hover {
    border-color: #3a3b44;
    color: #94a3b8;
    background: transparent;
}

[data-theme="dark"] .da-file-card {
    background: #1a1b1f;
    border-color: #2c2d33;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .da-file-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] .da-file-card.failed {
    border-color: #7F1D1D;
    background: rgba(127, 29, 29, 0.18);
}

[data-theme="dark"] .da-file-thumb {
    background: rgba(37, 99, 235, 0.16);
}

[data-theme="dark"] .da-file-card.image .da-file-thumb {
    background: #2c2d33;
}

[data-theme="dark"] .da-file-name {
    color: #e5e7eb;
}

[data-theme="dark"] .da-file-remove {
    background: rgba(255, 255, 255, 0.08);
    color: #cbd5e1;
}

.da-tool-btn input[type="checkbox"] {
    display: none;
}

[data-theme="dark"] .da-tool-btn {
    border-color: #3a3b44;
    color: #94a3b8;
}

[data-theme="dark"] .da-tool-btn.active,
[data-theme="dark"] .da-tool-btn:not(:disabled):hover {
    border-color: #60A5FA;
    color: #60A5FA;
    background: rgba(96, 165, 250, 0.12);
}

.da-send-btn {
    width: 34px;
    height: 34px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--primary-color);
    color: var(--text-inverse);
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
    flex-shrink: 0;
}

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

.da-send-btn.stop {
    background: var(--danger-color);
}

.da-send-btn.stop:hover {
    background: #B91C1C;
}

/* 输入区右侧按钮组（语音 + 发送） */
.da-input-tools-right {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.da-voice-btn {
    width: 34px;
    height: 34px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-muted);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}

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

.da-voice-btn.listening {
    background: #EF4444;
    border-color: #EF4444;
    color: #fff;
    animation: daVoicePulse 1.5s ease-in-out infinite;
}

@keyframes daVoicePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
}

/* 输入区里的"新对话"次按钮（图标 + 文字） */
.da-input-new-btn {
    height: 34px;
    padding: 0 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    flex-shrink: 0;
}

.da-input-new-btn:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: var(--primary-bg);
}

.da-footer-hint {
    max-width: 1200px;
    margin: 6px auto 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 11.5px;
    color: var(--text-muted);
    text-align: center;
}

.da-footer-hint i {
    color: var(--text-muted);
    font-size: 11px;
}

/* ===================== 图片预览 ===================== */
.da-image-preview {
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 32px;
    cursor: zoom-out;
}

.da-image-preview img {
    max-width: 100%;
    max-height: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

/* ===================== Toast ===================== */
.da-toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 16px;
    background: var(--text-primary);
    color: var(--text-inverse);
    border-radius: var(--radius-sm);
    font-size: 13px;
    z-index: 1100;
    box-shadow: var(--shadow-md);
}

.da-fade-enter-active,
.da-fade-leave-active {
    transition: opacity 0.2s, transform 0.2s;
}

.da-fade-enter-from,
.da-fade-leave-to {
    opacity: 0;
    transform: translate(-50%, 8px);
}

/* ===================== Markdown 基础 ===================== */
.markdown-body {
    word-wrap: break-word;
    color: var(--text-primary);
}

.markdown-body p {
    margin: 0 0 10px;
}

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

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
    margin: 20px 0 10px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.35;
    letter-spacing: -0.01em;
}

.markdown-body h1 {
    font-size: 22px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.markdown-body h2 {
    font-size: 18px;
}

.markdown-body h3 {
    font-size: 16px;
}

.markdown-body h4 {
    font-size: 14.5px;
}

.markdown-body ul,
.markdown-body ol {
    margin: 6px 0 10px;
    padding-left: 22px;
}

.markdown-body li {
    margin: 3px 0;
    line-height: 1.65;
}

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

.markdown-body a:hover {
    text-decoration: underline;
    color: var(--primary-hover);
}

.markdown-body code {
    padding: 1px 6px;
    background: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xs);
    font-family: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
    font-size: 0.88em;
    color: var(--text-primary);
}

.markdown-body pre {
    margin: 10px 0;
    padding: 12px 14px;
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow-x: auto;
    font-size: 13px;
    line-height: 1.55;
}

.markdown-body pre code {
    padding: 0;
    background: transparent;
    border: none;
    color: var(--text-primary);
}

.markdown-body blockquote {
    margin: 10px 0;
    padding: 8px 14px;
    border-left: 3px solid var(--primary-color);
    background: var(--primary-bg);
    color: var(--text-secondary);
    border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}

.markdown-body table {
    width: 100%;
    margin: 10px 0;
    border-collapse: collapse;
    font-size: 13.5px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

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

.markdown-body table tr:last-child td {
    border-bottom: none;
}

.markdown-body table th {
    background: var(--bg-muted);
    color: var(--text-primary);
    font-weight: 600;
}

.markdown-body table tr:hover td {
    background: var(--bg-muted);
}

.markdown-body img {
    max-width: 100%;
    border-radius: var(--radius-sm);
}

.markdown-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

.markdown-body hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 16px 0;
}

/* ===================== 响应式 ===================== */
@media (max-width: 768px) {
    .da-header {
        padding: 0 16px;
        flex-wrap: wrap;
        gap: 10px;
        height: auto;
    }

    .da-messages,
    .da-input-wrap,
    .da-footer-hint {
        padding-left: 16px;
        padding-right: 16px;
    }

    .da-main {
        padding: 20px 0;
    }

    .da-footer {
        padding: 12px 16px 14px;
    }

    .da-back-link span,
    .da-input-new-btn span {
        display: none;
    }
}

/* ========================================================== */
/* dodo-agentx 扩展：两栏布局（侧栏 + 聊天区） + 工具栏           */
/* ========================================================== */

/* 整体布局：flex 纵向 → header / body / footer */
#da-app {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* body 是横向 flex：sidebar + content */
.da-body {
    flex: 1;
    display: flex;
    min-height: 0;
    overflow: hidden;
}

/* content 是纵向 flex：main + footer */
.da-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    position: relative;
}

/* 侧栏折叠态：见 .da-sidebar 处的 width/padding/opacity 过渡（抽屉动画） */

.da-header { flex-shrink: 0; }
.da-footer { flex-shrink: 0; }

/* 侧栏 */
.da-sidebar {
    width: 280px;
    flex-shrink: 0;
    background: var(--da-sidebar-bg, #f8fafc);
    border-right: 1px solid var(--da-border, #e2e8f0);
    overflow: hidden;
    padding: 16px 14px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
    transition: width 0.28s cubic-bezier(0.4, 0, 0.2, 1),
                padding 0.28s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.2s ease;
}

/* 折叠态：宽度归零、内容透明，配合 transition 形成抽屉收起效果 */
.da-body.sidebar-collapsed .da-sidebar {
    width: 0;
    padding: 16px 0;
    opacity: 0;
    border-right-color: transparent;
}

/* 主区 */
.da-main {
    flex: 1;
    min-width: 0;
    min-height: 0;
    overflow-y: auto;
    -webkit-mask-image: linear-gradient(to bottom, #000 0, #000 calc(100% - 56px), transparent 100%);
    mask-image: linear-gradient(to bottom, #000 0, #000 calc(100% - 56px), transparent 100%);
}

[data-theme="dark"] .da-sidebar {
    --da-sidebar-bg: #1e1f24;
    --da-border: #2d2e36;
}

/* 新对话按钮（侧栏顶部） */
.da-sidebar-new {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #2563EB;
    background: rgba(37, 99, 235, 0.08);
    color: #2563EB;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
}

.da-sidebar-new:hover {
    background: #2563EB;
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* 侧栏分区标题 */
.da-sidebar-section-title {
    font-size: 14px;
    font-weight: 600;
    color: #64748b;
    letter-spacing: .02em;
    padding: 0 4px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.da-sidebar-section-title .da-count {
    background: rgba(37, 99, 235, 0.1);
    color: #2563EB;
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 12px;
}

/* ==================== 通用页面头部（管理类页面复用） ==================== */
.da-page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.da-page-header h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.da-page-header h2 i { color: var(--primary-color); }

/* ==================== 通用按钮 ==================== */
.da-btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    background: #2563EB;
    color: #fff;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
}

.da-btn-primary:hover { background: #1d4ed8; box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3); }
.da-btn-primary:disabled { opacity: .5; cursor: not-allowed; }

.da-btn-ghost {
    padding: 8px 16px;
    border: 1px solid #e2e8f0;
    background: transparent;
    color: #64748b;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all .2s;
}

.da-btn-ghost:hover { border-color: #cbd5e1; color: #334155; }

[data-theme="dark"] .da-btn-ghost { border-color: #3a3b44; color: #94a3b8; }
[data-theme="dark"] .da-btn-ghost:hover { border-color: #4a4b54; color: #e2e8f0; }

/* 历史会话分区：占满侧栏剩余空间，列表内部独立滚动 */
.da-sidebar-section {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.da-sidebar-section .da-sidebar-section-title {
    flex-shrink: 0;
}

/* 历史会话列表 */
.da-conv-list {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-right: 2px;
}

.da-conv-list::-webkit-scrollbar {
    width: 6px;
}

.da-conv-list::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 3px;
}

.da-conv-list::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

/* 加载更多提示 */
.da-conv-more-hint {
    flex-shrink: 0;
    padding: 8px 10px;
    text-align: center;
    font-size: 12px;
    color: #64748b;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.da-conv-more-hint.muted {
    color: #94a3b8;
}

[data-theme="dark"] .da-conv-more-hint { color: #94a3b8; }
[data-theme="dark"] .da-conv-more-hint.muted { color: #64748b; }

.da-conv-item {
    position: relative;
    padding: 8px 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: all .15s;
    border: 1px solid transparent;
}

.da-conv-item:hover {
    background: rgba(37, 99, 235, 0.06);
    border-color: rgba(37, 99, 235, 0.2);
}

.da-conv-item.active {
    background: rgba(37, 99, 235, 0.1);
    border-color: rgba(37, 99, 235, 0.3);
}

[data-theme="dark"] .da-conv-item:hover {
    background: rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .da-conv-item.active {
    background: rgba(59, 130, 246, 0.15);
}

.da-conv-title {
    font-size: 14px;
    font-weight: 500;
    color: #1e293b;
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding-right: 20px;
}

[data-theme="dark"] .da-conv-title { color: #e2e8f0; }

.da-conv-item.active .da-conv-title { color: #2563EB; }
[data-theme="dark"] .da-conv-item.active .da-conv-title { color: #60A5FA; }

.da-conv-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 3px;
    font-size: 11px;
    color: #94a3b8;
    font-variant-numeric: tabular-nums;
}

.da-conv-delete {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 22px;
    height: 22px;
    display: none;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: #94a3b8;
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    transition: all .15s;
}

.da-conv-item:hover .da-conv-delete { display: flex; }

.da-conv-delete:hover {
    color: #DC2626;
    background: rgba(220, 38, 38, 0.1);
}

/* 响应式：小屏隐藏侧栏 */
@media (max-width: 900px) {
    .da-sidebar { display: none; }
}