:root {
    --antdx-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    /* font scale —— 与 antd 5 token 对齐 */
    --antdx-font-size-sm: 12px;
    --antdx-font-size: 14px;
    --antdx-font-size-lg: 16px;
    --antdx-font-size-xl: 20px;
    --antdx-line-height-sm: 1.5;
    --antdx-line-height: 1.5715;
    --antdx-line-height-lg: 1.65;
    --antdx-color-primary: #1677ff;
    --antdx-color-primary-hover: #4096ff;
    --antdx-color-success: #52c41a;
    --antdx-color-warning: #faad14;
    --antdx-color-error: #ff4d4f;
    --antdx-color-info: #1677ff;
    --antdx-text: rgba(0, 0, 0, 0.88);
    --antdx-text-secondary: rgba(0, 0, 0, 0.65);
    --antdx-text-tertiary: rgba(0, 0, 0, 0.45);
    --antdx-border: rgba(5, 5, 5, 0.08);
    --antdx-border-strong: rgba(5, 5, 5, 0.16);
    --antdx-page-bg: #f7f8fa;
    --antdx-component-bg: #ffffff;
    --antdx-muted-bg: #f5f5f5;
    --antdx-elevated-bg: #ffffff;
    --antdx-bubble-bg-start: #f5f5f5;
    --antdx-bubble-bg-end: #1677ff;
    --antdx-bubble-fg-start: rgba(0, 0, 0, 0.88);
    --antdx-bubble-fg-end: #ffffff;
    /* X 专属 token —— 与 @ant-design/x x-provider 对齐 */
    --antdx-color-bg-chat: #f7f8fa;
    --antdx-color-bg-bubble-user: #1677ff;
    --antdx-color-bg-bubble-ai: #f5f5f5;
    --antdx-color-bg-bubble-system: rgba(0, 0, 0, 0.02);
    --antdx-color-border-bubble: rgba(5, 5, 5, 0.08);
    --antdx-color-text-bubble-user: #ffffff;
    --antdx-color-text-bubble-ai: rgba(0, 0, 0, 0.88);
    --antdx-color-text-think: rgba(0, 0, 0, 0.55);
    --antdx-color-bg-think: rgba(22, 119, 255, 0.04);
    --antdx-color-bg-thought-chain: rgba(22, 119, 255, 0.04);
    /* spacing token */
    --antdx-padding-chat: 16px;
    --antdx-padding-bubble: 10px 14px;
    --antdx-padding-xxs: 4px;
    --antdx-padding-xs: 8px;
    --antdx-padding-sm: 12px;
    --antdx-padding: 16px;
    --antdx-padding-lg: 24px;
    --antdx-margin-bubble: 12px;
    --antdx-radius-xs: 6px;
    --antdx-radius-sm: 8px;
    --antdx-radius-md: 12px;
    --antdx-radius-lg: 16px;
    --antdx-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
    --antdx-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    /* motion token —— 与 antd motion 对齐 */
    --antdx-motion-duration-fast: 0.10s;
    --antdx-motion-duration: 0.18s;
    --antdx-motion-duration-slow: 0.30s;
    --antdx-motion-ease-in-out: cubic-bezier(0.645, 0.045, 0.355, 1);
    --antdx-motion-ease-out: cubic-bezier(0.215, 0.61, 0.355, 1);
    --antdx-motion-ease-in: cubic-bezier(0.55, 0.055, 0.675, 0.19);
    --antdx-motion: var(--antdx-motion-duration) var(--antdx-motion-ease-in-out);
}

[data-theme="dark"],
.antdx-provider-dark {
    --antdx-text: rgba(255, 255, 255, 0.88);
    --antdx-text-secondary: rgba(255, 255, 255, 0.65);
    --antdx-text-tertiary: rgba(255, 255, 255, 0.45);
    --antdx-border: rgba(255, 255, 255, 0.10);
    --antdx-border-strong: rgba(255, 255, 255, 0.18);
    --antdx-page-bg: #141414;
    --antdx-component-bg: #1f1f1f;
    --antdx-muted-bg: #262626;
    --antdx-elevated-bg: #242424;
    --antdx-bubble-bg-start: #262626;
    --antdx-bubble-bg-end: #1668dc;
    --antdx-bubble-fg-start: rgba(255, 255, 255, 0.88);
    --antdx-bubble-fg-end: #ffffff;
    --antdx-color-bg-chat: #141414;
    --antdx-color-bg-bubble-user: #1668dc;
    --antdx-color-bg-bubble-ai: #262626;
    --antdx-color-bg-bubble-system: rgba(255, 255, 255, 0.04);
    --antdx-color-border-bubble: rgba(255, 255, 255, 0.10);
    --antdx-color-text-bubble-user: #ffffff;
    --antdx-color-text-bubble-ai: rgba(255, 255, 255, 0.88);
    --antdx-color-text-think: rgba(255, 255, 255, 0.55);
    --antdx-color-bg-think: rgba(22, 119, 255, 0.10);
    --antdx-color-bg-thought-chain: rgba(22, 119, 255, 0.10);
    --antdx-shadow: 0 6px 16px rgba(0, 0, 0, 0.32);
    --antdx-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.24);
}

@media (prefers-reduced-motion: reduce) {
    :root {
        --antdx-motion-duration-fast: 0s;
        --antdx-motion-duration: 0s;
        --antdx-motion-duration-slow: 0s;
    }
}

.antdx-provider,
.antdx-provider * {
    box-sizing: border-box;
}

.antdx-provider {
    color: var(--antdx-text);
    background: var(--antdx-page-bg);
    font-family: var(--antdx-font-family);
}

.antdx-page {
    min-height: 100vh;
    background: var(--antdx-page-bg);
    color: var(--antdx-text);
}

.antdx-shell {
    display: grid;
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
    gap: 16px;
    height: 100vh;
    padding: 16px;
}

.antdx-panel {
    min-width: 0;
    min-height: 0;
    background: var(--antdx-component-bg);
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-lg);
    box-shadow: var(--antdx-shadow-sm);
}

.antdx-scroll {
    overflow: auto;
}

.antdx-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 30px;
    padding: 4px 10px;
    border: 1px solid var(--antdx-border-strong);
    border-radius: var(--antdx-radius-sm);
    color: var(--antdx-text-secondary);
    background: var(--antdx-component-bg);
    font: inherit;
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    transition: color var(--antdx-motion), border-color var(--antdx-motion), background var(--antdx-motion), transform var(--antdx-motion);
}

.antdx-action:hover:not(:disabled) {
    color: var(--antdx-color-primary);
    border-color: var(--antdx-color-primary);
}

.antdx-action:disabled,
.antdx-action-disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

.antdx-action-danger {
    color: var(--antdx-color-error);
    border-color: rgba(255, 77, 79, 0.35);
}

.antdx-action-recording {
    color: #fff;
    background: var(--antdx-color-error);
    border-color: var(--antdx-color-error);
    animation: antdx-recording-pulse 1.4s ease-in-out infinite;
}

@keyframes antdx-recording-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255, 77, 79, 0.55); }
    50%      { box-shadow: 0 0 0 6px rgba(255, 77, 79, 0); }
}

.antdx-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

.antdx-actions-small .antdx-action {
    min-height: 24px;
    padding: 2px 8px;
    font-size: 12px;
}

.antdx-bubble-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 100%;
}

.antdx-bubble {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    width: 100%;
}

.antdx-bubble-end {
    flex-direction: row-reverse;
}

.antdx-bubble-avatar {
    width: 32px;
    height: 32px;
    flex: 0 0 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: #fff;
    background: linear-gradient(135deg, #1677ff, #69b1ff);
    border-radius: 50%;
    box-shadow: var(--antdx-shadow-sm);
}

.antdx-bubble-avatar-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.antdx-bubble-body {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    max-width: min(760px, calc(100% - 44px));
}

.antdx-bubble-end .antdx-bubble-body {
    align-items: flex-end;
}

.antdx-bubble-header,
.antdx-bubble-footer {
    color: var(--antdx-text-tertiary);
    font-size: 12px;
    line-height: 1.4;
}

.antdx-bubble-content {
    padding: var(--antdx-padding-bubble);
    color: var(--antdx-color-text-bubble-ai, var(--antdx-bubble-fg-start));
    background: var(--antdx-color-bg-bubble-ai, var(--antdx-bubble-bg-start));
    border: 1px solid transparent;
    border-radius: var(--antdx-radius-md);
    box-shadow: var(--antdx-shadow-sm);
    line-height: var(--antdx-line-height-lg);
    overflow-wrap: anywhere;
    animation: antdx-bubble-enter var(--antdx-motion-duration) var(--antdx-motion-ease-out) both;
}

.antdx-bubble-end .antdx-bubble-content {
    color: var(--antdx-color-text-bubble-user, var(--antdx-bubble-fg-end));
    background: var(--antdx-color-bg-bubble-user, var(--antdx-bubble-bg-end));
}

@keyframes antdx-bubble-enter {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

.antdx-bubble-borderless .antdx-bubble-content {
    padding-inline: 0;
    background: transparent;
    box-shadow: none;
}

.antdx-bubble-outlined .antdx-bubble-content {
    background: var(--antdx-component-bg);
    border-color: var(--antdx-border-strong);
}

.antdx-bubble-shadow .antdx-bubble-content {
    background: var(--antdx-elevated-bg);
    box-shadow: var(--antdx-shadow);
}

.antdx-bubble-typing {
    display: inline-flex;
    gap: 4px;
    min-width: 34px;
    padding: 5px 0;
}

.antdx-bubble-typing span {
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: currentColor;
    opacity: 0.4;
    animation: antdx-typing 1.2s infinite ease-in-out;
}

.antdx-bubble-typing span:nth-child(2) {
    animation-delay: 0.16s;
}

.antdx-bubble-typing span:nth-child(3) {
    animation-delay: 0.32s;
}

@keyframes antdx-typing {
    0%, 80%, 100% {
        opacity: 0.24;
        transform: scale(0.82);
    }
    40% {
        opacity: 1;
        transform: scale(1);
    }
}

.antdx-welcome {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 24px;
    color: var(--antdx-text);
    background: linear-gradient(180deg, rgba(22, 119, 255, 0.08), rgba(22, 119, 255, 0));
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-lg);
}

.antdx-welcome-compact {
    padding: 16px;
}

.antdx-welcome-icon {
    width: 48px;
    height: 48px;
    flex: 0 0 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: linear-gradient(135deg, #1677ff, #722ed1);
    border-radius: var(--antdx-radius-lg);
    box-shadow: var(--antdx-shadow-sm);
    font-size: 22px;
}

.antdx-welcome-title {
    margin: 0;
    color: var(--antdx-text);
    font-size: 22px;
    font-weight: 650;
    line-height: 1.3;
}

.antdx-welcome-description {
    margin: 6px 0 0;
    color: var(--antdx-text-secondary);
    line-height: 1.7;
}

.antdx-welcome-extra {
    margin-top: 12px;
}

.antdx-prompts {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.antdx-prompts-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.antdx-prompts-header h3,
.antdx-sources-header,
.antdx-folder-title,
.antdx-thought-chain-header {
    margin: 0;
    color: var(--antdx-text);
    font-size: 14px;
    font-weight: 650;
}

.antdx-prompts-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 10px;
}

.antdx-prompts-vertical .antdx-prompts-list {
    display: flex;
    flex-direction: column;
}

.antdx-prompts:not(.antdx-prompts-wrap) .antdx-prompts-list {
    display: flex;
    overflow-x: auto;
}

.antdx-prompt {
    min-width: 0;
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr) auto;
    gap: 10px;
    align-items: flex-start;
    padding: 12px;
    text-align: left;
    color: var(--antdx-text);
    background: var(--antdx-component-bg);
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-md);
    cursor: pointer;
    transition: border-color var(--antdx-motion), box-shadow var(--antdx-motion), transform var(--antdx-motion);
}

.antdx-prompt:hover:not(:disabled) {
    border-color: rgba(22, 119, 255, 0.55);
    box-shadow: 0 8px 18px rgba(22, 119, 255, 0.12);
    transform: translateY(-1px);
}

.antdx-prompt:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.antdx-prompt-icon,
.antdx-suggestion-icon,
.antdx-source-icon,
.antdx-conversation-icon,
.antdx-folder-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--antdx-color-primary);
}

.antdx-prompt-main,
.antdx-suggestion-main,
.antdx-source-main,
.antdx-conversation-main,
.antdx-folder-main {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.antdx-prompt-title,
.antdx-source-title,
.antdx-conversation-title,
.antdx-folder-name {
    color: var(--antdx-text);
    font-weight: 600;
    line-height: 1.4;
}

.antdx-conversation-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.antdx-prompt-description,
.antdx-source-description,
.antdx-conversation-description,
.antdx-folder-description,
.antdx-suggestion-main small {
    color: var(--antdx-text-tertiary);
    font-size: 12px;
    line-height: 1.45;
}

.antdx-prompt-tag,
.antdx-conversation-count,
.antdx-source-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 22px;
    padding: 0 7px;
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.08);
    border-radius: 999px;
    font-size: 12px;
}

.antdx-prompt-children {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.antdx-prompt-children span {
    padding: 2px 7px;
    color: var(--antdx-text-secondary);
    background: var(--antdx-muted-bg);
    border-radius: 999px;
    font-size: 12px;
}

.antdx-conversations {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
    min-height: 0;
    box-sizing: border-box;
    container-type: inline-size;
}

.antdx-conversations-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 12px 12px 8px;
    color: var(--antdx-text);
    font-weight: 650;
}

.antdx-conversations-header small,
.antdx-conversation-time {
    color: var(--antdx-text-tertiary);
    font-size: 12px;
    font-weight: 400;
}

.antdx-conversations-group {
    padding: 10px 12px 4px;
    color: var(--antdx-text-tertiary);
    font-size: 12px;
    font-weight: 650;
    text-transform: uppercase;
}

.antdx-conversation-item {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr) auto;
    gap: 8px;
    align-items: center;
    width: calc(100% - 12px);
    margin: 0 6px;
    padding: 9px 10px;
    text-align: left;
    color: var(--antdx-text-secondary);
    background: transparent;
    border: 0;
    border-radius: var(--antdx-radius-sm);
    cursor: pointer;
}

.antdx-conversation-item:hover:not(:disabled) {
    background: var(--antdx-muted-bg);
}

.antdx-conversation-item-active {
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.10);
}

.antdx-conversation-item:disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

.antdx-sender {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.antdx-sender-header {
    color: var(--antdx-text-secondary);
    font-size: 13px;
}

.antdx-sender-editor {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px;
    background: var(--antdx-component-bg);
    border: 1px solid var(--antdx-border-strong);
    border-radius: var(--antdx-radius-lg);
    box-shadow: var(--antdx-shadow-sm);
    transition: border-color var(--antdx-motion), box-shadow var(--antdx-motion);
}

.antdx-sender-editor:focus-within {
    border-color: rgba(22, 119, 255, 0.7);
    box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.10);
}

.antdx-sender-editor.antdx-attachments-drag-over {
    border-color: rgba(22, 119, 255, 0.62);
    background: color-mix(in srgb, var(--antdx-component-bg) 88%, var(--antdx-color-primary));
    box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.10);
}

.antdx-sender-header,
.antdx-sender-custom-footer,
.antdx-sender-footer {
    transition: max-height var(--antdx-motion-duration) var(--antdx-motion-ease-in-out),
                opacity var(--antdx-motion-duration) var(--antdx-motion-ease-in-out);
}

.antdx-sender-textarea {
    width: 100%;
    min-height: 52px;
    max-height: 260px;
    resize: vertical;
    color: var(--antdx-text);
    background: transparent;
    border: 0;
    outline: 0;
    font: inherit;
    font-size: 14px;
    line-height: 1.7;
}

.antdx-sender-textarea::placeholder {
    color: var(--antdx-text-tertiary);
}

.antdx-sender-footer,
.antdx-sender-tools,
.antdx-sender-submit {
    display: flex;
    align-items: center;
    gap: 8px;
}

.antdx-sender-footer {
    justify-content: space-between;
}

.antdx-sender-attachments-panel {
    position: relative;
    width: 100%;
    min-width: 0;
}

.antdx-sender-attachments-panel .antdx-attachments {
    width: 100%;
}

.antdx-sender-attachments-close {
    position: absolute;
    z-index: 2;
    top: 8px;
    right: 8px;
    width: 26px;
    height: 26px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--antdx-text-tertiary);
    background: color-mix(in srgb, var(--antdx-muted-bg) 72%, var(--antdx-component-bg));
    border: 1px solid color-mix(in srgb, var(--antdx-border-strong) 70%, transparent);
    border-radius: var(--antdx-radius-xs);
    cursor: pointer;
    font: inherit;
    line-height: 1;
    box-shadow: var(--antdx-shadow-sm);
    transition: color var(--antdx-motion), border-color var(--antdx-motion), background var(--antdx-motion);
}

.antdx-sender-attachments-close:hover {
    color: var(--antdx-color-primary);
    background: var(--antdx-component-bg);
    border-color: rgba(22, 119, 255, 0.35);
}

.antdx-sender-file-input,
.antdx-attachments-input {
    display: none;
}

.antdx-sender-send,
.antdx-sender-stop {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 32px;
    padding: 4px 14px;
    color: #fff;
    background: var(--antdx-color-primary);
    border: 0;
    border-radius: var(--antdx-radius-sm);
    font: inherit;
    cursor: pointer;
}

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

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

.antdx-sender-stop {
    color: var(--antdx-color-error);
    background: rgba(255, 77, 79, 0.10);
}

.antdx-attachments {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.antdx-attachments-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--antdx-text-secondary);
    font-size: 13px;
    font-weight: 600;
}

.antdx-attachments-count {
    min-width: 20px;
    padding: 1px 7px;
    text-align: center;
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.08);
    border-radius: 999px;
}

.antdx-attachments-empty,
.antdx-attachments-upload {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 62px;
    padding: 12px;
    color: var(--antdx-text-tertiary);
    background: var(--antdx-muted-bg);
    border: 1px dashed var(--antdx-border-strong);
    border-radius: var(--antdx-radius-md);
    cursor: pointer;
}

.antdx-sender-attachments-panel .antdx-attachments-empty {
    padding-right: 44px;
}

.antdx-attachments-upload {
    min-height: 32px;
    justify-content: flex-start;
    background: transparent;
}

.antdx-attachments-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 8px;
}

.antdx-attachments-compact .antdx-attachments-list {
    display: flex;
    flex-wrap: wrap;
}

.antdx-file-card {
    position: relative;
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    min-width: 210px;
    padding: 8px;
    color: var(--antdx-text);
    background: var(--antdx-component-bg);
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-md);
}

.antdx-file-card-compact {
    min-width: 190px;
}

.antdx-file-card-preview {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.08);
    border-radius: var(--antdx-radius-sm);
    font-size: 20px;
}

.antdx-file-card-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.antdx-file-card-body {
    min-width: 0;
}

.antdx-file-card-name {
    overflow: hidden;
    color: var(--antdx-text);
    font-size: 13px;
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.antdx-file-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    color: var(--antdx-text-tertiary);
    font-size: 12px;
}

.antdx-file-card-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    color: var(--antdx-text-tertiary);
    background: transparent;
    border: 0;
    border-radius: 50%;
    cursor: pointer;
}

.antdx-file-card-remove:hover {
    color: var(--antdx-color-error);
    background: rgba(255, 77, 79, 0.10);
}

.antdx-file-card-progress {
    height: 3px;
    margin-top: 6px;
    overflow: hidden;
    background: var(--antdx-muted-bg);
    border-radius: 999px;
}

.antdx-file-card-progress span {
    display: block;
    height: 100%;
    background: var(--antdx-color-primary);
}

.antdx-file-card-error {
    border-color: rgba(255, 77, 79, 0.45);
}

.antdx-file-card-done .antdx-file-card-preview {
    color: var(--antdx-color-success);
    background: rgba(82, 196, 26, 0.12);
}

.antdx-thought-chain {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.antdx-thought-chain-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}

.antdx-thought-chain-item {
    position: relative;
    display: block;
    padding-bottom: 14px;
}

.antdx-thought-chain-item:not(:last-child)::before {
    position: absolute;
    top: 28px;
    bottom: 0;
    left: 13px;
    width: 1px;
    background: var(--antdx-border-strong);
    content: "";
}

.antdx-thought-chain-dot,
.antdx-think-icon {
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.10);
    border-radius: 50%;
}

.antdx-thought-chain-row {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 10px;
    align-items: start;
    min-width: 0;
}

.antdx-thought-chain-item-success .antdx-thought-chain-dot,
.antdx-think-success .antdx-think-icon {
    color: var(--antdx-color-success);
    background: rgba(82, 196, 26, 0.12);
}

.antdx-thought-chain-item-warning .antdx-thought-chain-dot,
.antdx-think-warning .antdx-think-icon {
    color: var(--antdx-color-warning);
    background: rgba(250, 173, 20, 0.14);
}

.antdx-thought-chain-item-error .antdx-thought-chain-dot,
.antdx-think-error .antdx-think-icon {
    color: var(--antdx-color-error);
    background: rgba(255, 77, 79, 0.12);
}

.antdx-thought-chain-card {
    min-width: 0;
    padding: 10px 12px;
    background: var(--antdx-color-bg-thought-chain, var(--antdx-component-bg));
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-md);
    transition: border-color var(--antdx-motion);
}

.antdx-thought-chain-title {
    color: var(--antdx-text);
    font-weight: 650;
}

.antdx-thought-chain-description,
.antdx-thought-chain-content {
    margin-top: 4px;
    color: var(--antdx-text-secondary);
    font-size: 13px;
    line-height: 1.6;
}

.antdx-think {
    overflow: hidden;
    color: var(--antdx-color-text-think, var(--antdx-text-secondary));
    background: var(--antdx-color-bg-think, var(--antdx-component-bg));
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-md);
}

.antdx-think-header {
    display: grid;
    grid-template-columns: 28px auto minmax(0, 1fr) 20px;
    gap: 10px;
    align-items: center;
    width: 100%;
    padding: 10px 12px;
    text-align: left;
    color: var(--antdx-text);
    background: transparent;
    border: 0;
    cursor: pointer;
}

.antdx-think-title {
    font-weight: 650;
}

.antdx-think-description {
    overflow: hidden;
    color: var(--antdx-text-tertiary);
    font-size: 12px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.antdx-think-arrow {
    color: var(--antdx-text-tertiary);
    transition: transform var(--antdx-motion);
}

.antdx-think-open .antdx-think-arrow {
    transform: rotate(180deg);
}

.antdx-think-content {
    padding: 0 12px 12px 50px;
    color: var(--antdx-text-secondary);
    line-height: 1.65;
}

.antdx-suggestion {
    position: relative;
}

.antdx-suggestion-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 220px;
    padding: 6px;
    background: var(--antdx-elevated-bg);
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-md);
    box-shadow: var(--antdx-shadow);
}

.antdx-suggestion-item {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr) auto;
    gap: 8px;
    align-items: center;
    padding: 8px;
    padding-left: calc(8px + var(--antdx-suggestion-indent, 0px));
    text-align: left;
    color: var(--antdx-text);
    background: transparent;
    border: 0;
    border-radius: var(--antdx-radius-sm);
    cursor: pointer;
}

.antdx-suggestion-item:hover:not(:disabled) {
    background: var(--antdx-muted-bg);
}

.antdx-suggestion-chevron {
    color: var(--antdx-text-tertiary);
    font-size: 12px;
}

.antdx-suggestion-children {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.antdx-sources {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.antdx-sources-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 8px;
}

.antdx-sources-compact .antdx-sources-list {
    display: flex;
    flex-direction: column;
}

@media (max-width: 640px) {
    .antdx-sources-list {
        grid-template-columns: 1fr !important;
    }
}

.antdx-source {
    display: grid;
    grid-template-columns: 24px 24px minmax(0, 1fr);
    gap: 8px;
    align-items: flex-start;
    padding: 10px;
    color: inherit;
    text-decoration: none;
    background: var(--antdx-component-bg);
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-md);
}

.antdx-source:hover {
    border-color: rgba(22, 119, 255, 0.55);
}

.antdx-markdown {
    line-height: 1.65;
}

.antdx-markdown :first-child {
    margin-top: 0;
}

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

.antdx-markdown pre,
.antdx-code pre,
.antdx-mermaid-fallback {
    overflow: auto;
    margin: 0;
    padding: 12px;
    color: #d4d4d4;
    background: #1f1f1f;
    border-radius: 0 0 var(--antdx-radius-md) var(--antdx-radius-md);
    font-size: 13px;
    line-height: 1.55;
}

.antdx-code,
.antdx-mermaid {
    overflow: hidden;
    margin: 0;
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-md);
    background: var(--antdx-component-bg);
}

.antdx-code-header,
.antdx-mermaid-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 10px;
    color: var(--antdx-text-secondary);
    background: var(--antdx-muted-bg);
    border-bottom: 1px solid var(--antdx-border);
    font-size: 12px;
}

.antdx-code-copy {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--antdx-text-secondary);
    background: transparent;
    border: 0;
    cursor: pointer;
}

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

.antdx-code-table td {
    padding: 0;
    vertical-align: top;
}

.antdx-code-ln {
    width: 1%;
    padding-right: 12px !important;
    color: rgba(255, 255, 255, 0.35);
    text-align: right;
    user-select: none;
    font-variant-numeric: tabular-nums;
}

.antdx-code-line {
    white-space: pre;
}

.antdx-code-cursor {
    display: inline-block;
    margin-left: 1px;
    color: var(--antdx-color-primary, #1677ff);
    animation: antdx-code-blink 1s steps(2, start) infinite;
}

@keyframes antdx-code-blink {
    to { opacity: 0; }
}

.antdx-mermaid-canvas {
    overflow: auto;
    padding: 12px;
}

.antdx-mermaid-error {
    margin: 8px 12px 12px;
    padding: 10px 12px;
    color: #cf1322;
    background: #fff1f0;
    border: 1px solid #ffccc7;
    border-radius: var(--antdx-radius-sm);
    font-size: 12px;
}

.antdx-mermaid-error-source {
    margin: 6px 0 0;
    padding: 8px;
    background: rgba(0, 0, 0, 0.04);
    color: var(--antdx-text);
    font-size: 11px;
    white-space: pre-wrap;
}

.antdx-folder {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

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

.antdx-folder-list-child {
    margin-left: 12px;
}

.antdx-folder-item {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 8px;
    align-items: center;
    width: 100%;
    padding: 8px 10px 8px calc(10px + var(--antdx-folder-indent, 0px));
    text-align: left;
    color: var(--antdx-text);
    background: transparent;
    border: 0;
    border-radius: var(--antdx-radius-sm);
    cursor: pointer;
}

.antdx-folder-card {
    padding: 8px;
    background: var(--antdx-component-bg);
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-md);
}

.antdx-folder-item:hover:not(:disabled),
.antdx-folder-item-active {
    background: rgba(22, 119, 255, 0.10);
}

.antdx-folder-item-active .antdx-folder-name {
    color: var(--antdx-color-primary);
}

.antdx-folder-item {
    grid-template-columns: 24px minmax(0, 1fr) auto;
}

.antdx-folder-badge {
    display: inline-flex;
    align-items: center;
    height: 18px;
    padding: 0 6px;
    margin-left: auto;
    font-size: 11px;
    line-height: 1;
    color: var(--antdx-text-secondary);
    background: var(--antdx-muted-bg);
    border-radius: 999px;
}

.antdx-folder-badge-success { color: #fff; background: #52c41a; }
.antdx-folder-badge-warning { color: #fff; background: #faad14; }
.antdx-folder-badge-error   { color: #fff; background: #ff4d4f; }
.antdx-folder-badge-info    { color: #fff; background: #1677ff; }

.antdx-notification {
    position: fixed;
    z-index: 1050;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: min(360px, calc(100vw - 32px));
    pointer-events: none;
}

.antdx-notification-topright {
    top: 16px;
    right: 16px;
}

.antdx-notification-topleft {
    top: 16px;
    left: 16px;
}

.antdx-notification-bottomright {
    right: 16px;
    bottom: 16px;
}

.antdx-notification-bottomleft {
    bottom: 16px;
    left: 16px;
}

.antdx-notification-item {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr) 24px;
    gap: 10px;
    padding: 12px;
    pointer-events: auto;
    background: var(--antdx-elevated-bg);
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-md);
    box-shadow: var(--antdx-shadow);
    animation: antdx-notification-enter var(--antdx-motion-duration-slow) var(--antdx-motion-ease-out) both;
}

@keyframes antdx-notification-enter {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.antdx-notification-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--antdx-color-primary);
    font-size: 18px;
}

.antdx-notification-item-success .antdx-notification-icon {
    color: var(--antdx-color-success);
}

.antdx-notification-item-warning .antdx-notification-icon {
    color: var(--antdx-color-warning);
}

.antdx-notification-item-error .antdx-notification-icon {
    color: var(--antdx-color-error);
}

.antdx-notification-main {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.antdx-notification-title {
    color: var(--antdx-text);
    font-weight: 650;
}

.antdx-notification-description {
    color: var(--antdx-text-secondary);
    font-size: 13px;
    line-height: 1.55;
}

.antdx-notification-close {
    width: 24px;
    height: 24px;
    color: var(--antdx-text-tertiary);
    background: transparent;
    border: 0;
    border-radius: 50%;
    cursor: pointer;
}

.antdx-notification-tag {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    min-height: 20px;
    padding: 0 7px;
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.08);
    border-radius: 999px;
    font-size: 12px;
}

.antdx-bubble-shape-round .antdx-bubble-content {
    border-radius: var(--antdx-radius-lg);
}

.antdx-bubble-shape-corner .antdx-bubble-content {
    border-radius: var(--antdx-radius-md) var(--antdx-radius-md) var(--antdx-radius-xs) var(--antdx-radius-md);
}

.antdx-bubble-status-error .antdx-bubble-content {
    border-color: rgba(255, 77, 79, 0.35);
}

.antdx-bubble-status-processing .antdx-bubble-content,
.antdx-bubble-streaming .antdx-bubble-content {
    border-color: rgba(22, 119, 255, 0.25);
}

.antdx-bubble-extra {
    color: var(--antdx-text-secondary);
    font-size: 13px;
    line-height: 1.65;
}

.antdx-bubble-divider {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 4px 0;
    color: var(--antdx-text-tertiary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0;
}

.antdx-bubble-divider::before,
.antdx-bubble-divider::after {
    flex: 1 1 auto;
    height: 1px;
    background: var(--antdx-border);
    content: "";
}

.antdx-prompt-node {
    min-width: 0;
}

.antdx-prompt-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    align-items: stretch;
}

.antdx-prompt {
    min-height: 100%;
}

.antdx-prompt-expand {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    padding: 0 8px;
    color: var(--antdx-text-tertiary);
    background: var(--antdx-component-bg);
    border: 1px solid var(--antdx-border);
    border-radius: var(--antdx-radius-md);
    cursor: pointer;
}

.antdx-prompt-expand:hover:not(:disabled) {
    color: var(--antdx-color-primary);
    border-color: rgba(22, 119, 255, 0.55);
}

.antdx-prompt-expand:disabled,
.antdx-conversation-item-action:disabled,
.antdx-sender-icon-button:disabled,
.antdx-mermaid-action:disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

.antdx-prompt-children-panel {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 8px;
    padding-left: 16px;
    border-left: 1px solid var(--antdx-border);
}

.antdx-prompt-node-child {
    margin-top: 2px;
}

.antdx-conversations-sort {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 12px 8px;
}

.antdx-conversation-item-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 6px;
    align-items: center;
    width: calc(100% - 12px);
    margin: 0 6px;
}

.antdx-conversation-item-wrap .antdx-conversation-item {
    width: 100%;
    margin: 0;
}

.antdx-conversation-item-editing {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    align-items: center;
}

.antdx-conversation-rename {
    width: 100%;
    min-width: 0;
    min-height: 32px;
    padding: 5px 8px;
    color: var(--antdx-text);
    background: var(--antdx-component-bg);
    border: 1px solid var(--antdx-border-strong);
    border-radius: var(--antdx-radius-sm);
    font: inherit;
}

.antdx-conversation-item-actions {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    justify-content: flex-end;
    white-space: nowrap;
}

.antdx-conversation-item-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    color: var(--antdx-text-tertiary);
    background: transparent;
    border: 0;
    border-radius: 50%;
    cursor: pointer;
}

.antdx-conversation-item-action:hover:not(:disabled) {
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.08);
}

.antdx-conversation-item-action-danger:hover:not(:disabled) {
    color: var(--antdx-color-error);
    background: rgba(255, 77, 79, 0.10);
}

@container (max-width: 320px) {
    .antdx-conversation-item-wrap {
        gap: 4px;
    }

    .antdx-conversation-item-wrap > .antdx-conversation-item-actions {
        flex-direction: column;
        align-items: flex-end;
        justify-content: center;
        gap: 2px;
    }

    .antdx-conversation-item-wrap > .antdx-conversation-item-actions .antdx-conversation-item-action {
        width: 24px;
        height: 24px;
    }
}

.antdx-sender-header {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.antdx-sender-header-content,
.antdx-sender-prefix,
.antdx-sender-suffix {
    min-width: 0;
    flex: 1 1 auto;
}

.antdx-sender-icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    color: var(--antdx-text-tertiary);
    background: transparent;
    border: 0;
    border-radius: 50%;
    cursor: pointer;
}

.antdx-sender-icon-button:hover {
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.08);
}

.antdx-sender-textarea-autosize {
    resize: none;
    overflow: hidden;
}

.antdx-sender-custom-footer {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: space-between;
}

.antdx-sender-footer-collapsed {
    justify-content: flex-end;
}

.antdx-sender-suffix {
    color: var(--antdx-text-secondary);
    font-size: 13px;
}

.antdx-attachments-disabled {
    opacity: 0.65;
}

.antdx-attachments-uploadable .antdx-attachments-empty,
.antdx-attachments-uploadable .antdx-attachments-upload {
    transition: border-color var(--antdx-motion), background var(--antdx-motion), color var(--antdx-motion);
}

.antdx-attachments-drag-over .antdx-attachments-empty,
.antdx-attachments-drag-over .antdx-attachments-upload {
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.08);
    border-color: rgba(22, 119, 255, 0.55);
}

.antdx-markdown-code-highlighter .antdx-code {
    margin: 12px 0;
}

.antdx-mermaid-header {
    align-items: center;
}

.antdx-mermaid-actions {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.antdx-mermaid-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    color: var(--antdx-text-tertiary);
    background: transparent;
    border: 0;
    border-radius: 50%;
    cursor: pointer;
}

.antdx-mermaid-action:hover {
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.08);
}

.antdx-mermaid-action-active {
    color: var(--antdx-color-primary);
    background: rgba(22, 119, 255, 0.12);
}

.antdx-mermaid-code-mode .antdx-code {
    margin: 0;
    border: 0;
    border-radius: 0 0 var(--antdx-radius-md) var(--antdx-radius-md);
}

@media (max-width: 900px) {
    .antdx-shell {
        grid-template-columns: 1fr;
        height: auto;
        min-height: 100vh;
    }

    .antdx-sender-footer {
        align-items: stretch;
        flex-direction: column;
    }

    .antdx-sender-tools,
    .antdx-sender-submit {
        justify-content: space-between;
        width: 100%;
    }
}

/* === Thought chain extensions === */
.antdx-thought-chain-small .antdx-thought-chain-card { padding: 6px 10px; font-size: 12px; }
.antdx-thought-chain-large .antdx-thought-chain-card { padding: 14px 18px; font-size: 14px; }
.antdx-thought-chain-collapsible .antdx-thought-chain-row { cursor: pointer; }
.antdx-thought-chain-toggle { margin-left: 8px; opacity: 0.55; transition: transform var(--antdx-motion); }
.antdx-thought-chain-item-collapsed > .antdx-thought-chain-row .antdx-thought-chain-toggle { transform: rotate(-90deg); }
.antdx-thought-chain-children { padding-left: 24px; margin-top: 4px; border-left: 1px dashed var(--antdx-border); }
.antdx-thought-chain-item-depth-1 > .antdx-thought-chain-row .antdx-thought-chain-dot { transform: scale(0.85); }
.antdx-thought-chain-item-has-children > .antdx-thought-chain-row { font-weight: 500; }

.antdx-streaming-text {
    display: inline;
    white-space: pre-wrap;
    word-break: break-word;
}

.antdx-streaming-text-delta {
    color: inherit;
    animation: antdx-stream-fade var(--antdx-motion-duration) var(--antdx-motion-ease-out) both;
}

.antdx-streaming-text-cursor {
    display: inline-block;
    width: 1px;
    height: 1em;
    margin-left: 2px;
    vertical-align: -0.18em;
    background: currentColor;
    animation: antdx-stream-blink 1s steps(2) infinite;
}

@keyframes antdx-stream-fade {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes antdx-stream-blink {
    50% { opacity: 0; }
}

/* ===== Playground 实战范例 ===== */
.playground { display: flex; gap: 0; min-height: 0; background: var(--antdx-component-bg); border: 1px solid var(--antdx-border); border-radius: 14px; overflow: hidden; }
.playground-logo-mark { display:inline-flex; align-items:center; justify-content:center; width:28px; height:28px; border-radius:8px; background:linear-gradient(135deg,#1677ff,#69b1ff); color:#fff; font-weight:800; font-size:14px; }

/* Ultramodern: 280px sider + chat */
.playground-ultramodern { height: calc(100vh - 220px); min-height: 540px; }
.playground-side { width: 280px; flex-shrink: 0; display: flex; flex-direction: column; gap: 12px; padding: 14px; background: var(--antdx-page-bg); border-right: 1px solid var(--antdx-border); overflow: hidden; }
.playground-logo { display:flex; align-items:center; gap:10px; padding: 4px 6px; }
.playground-logo-text { font-weight: 700; color: var(--antdx-text); }
.playground-new-chat { display:flex; align-items:center; gap:8px; padding: 9px 12px; border:1px dashed var(--antdx-border); border-radius:10px; background:transparent; color: var(--antdx-text); cursor:pointer; }
.playground-new-chat:hover { border-color: var(--antdx-color-primary); color: var(--antdx-color-primary); }
.playground-side-conversations { flex:1; overflow: auto; }
.playground-chat { flex:1; display:flex; flex-direction:column; min-width:0; }
.playground-chat-header { display:flex; align-items:center; gap:8px; padding: 12px 18px; border-bottom: 1px solid var(--antdx-border); color: var(--antdx-text); }
.playground-chat-body { flex:1; overflow:auto; padding: 18px; }
.playground-startpage { height:100%; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:8px; }
.playground-agent-name { font-size: 32px; font-weight: 700; background: linear-gradient(135deg,#1677ff,#9254de); -webkit-background-clip: text; background-clip: text; color: transparent; }
.playground-chat-footer { padding: 12px 18px 16px; border-top: 1px solid var(--antdx-border); }
.playground-sender-footer { display:flex; align-items:center; justify-content:space-between; gap:8px; width:100%; }
.playground-chip { display:inline-flex; align-items:center; gap:6px; padding:5px 10px; border-radius:999px; border:1px solid var(--antdx-border); background:transparent; color: var(--antdx-text-secondary); cursor:pointer; font-size:12px; }
.playground-chip:hover { color: var(--antdx-color-primary); border-color: var(--antdx-color-primary); }
.playground-chip-on { color: var(--antdx-color-primary); border-color: var(--antdx-color-primary); background: rgba(22,119,255,.08); }
.playground-ultra-send { width:32px; height:32px; display:inline-flex; align-items:center; justify-content:center; flex:0 0 32px; color:#fff; background:var(--antdx-color-primary); border:0; border-radius:50%; box-shadow:0 6px 14px rgba(22,119,255,.24); cursor:pointer; transition:background var(--antdx-motion), box-shadow var(--antdx-motion), transform var(--antdx-motion), opacity var(--antdx-motion); }
.playground-ultra-send:hover:not(:disabled) { background:var(--antdx-color-primary-hover); box-shadow:0 8px 18px rgba(22,119,255,.30); transform:translateY(-1px); }
.playground-ultra-send:disabled { color:var(--antdx-text-tertiary); background:var(--antdx-muted-bg); box-shadow:none; cursor:not-allowed; opacity:.82; }

/* Independent: centered welcome page */
.playground-independent { flex-direction: column; padding: 24px clamp(16px, 4vw, 48px) 16px; min-height: 600px; }
.playground-independent-welcome { max-width: 780px; width: 100%; margin: 0 auto; display:flex; flex-direction:column; gap: 20px; }
.playground-independent-chat { max-width: 780px; width: 100%; margin: 0 auto; flex:1; }
.playground-welcome-extra { display:flex; gap:6px; }
.playground-icon-btn { width:32px; height:32px; display:inline-flex; align-items:center; justify-content:center; border:1px solid var(--antdx-border); background:transparent; border-radius:8px; color: var(--antdx-text-secondary); cursor:pointer; }
.playground-icon-btn:hover { color: var(--antdx-color-primary); border-color: var(--antdx-color-primary); }
.playground-section { background: var(--antdx-page-bg); border:1px solid var(--antdx-border); border-radius:12px; padding: 14px 16px; }
.playground-section-header { display:flex; align-items:center; gap:8px; color: var(--antdx-text); margin-bottom: 10px; }
.playground-hot-list { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:6px; }
.playground-hot-list li { display:flex; align-items:center; gap:10px; }
.playground-rank { display:inline-flex; align-items:center; justify-content:center; width:20px; height:20px; border-radius:6px; font-size:12px; font-weight:700; color:#fff; background: var(--antdx-text-tertiary); }
.playground-rank.rank-1 { background:#ff4d4f; }
.playground-rank.rank-2 { background:#fa8c16; }
.playground-rank.rank-3 { background:#fadb14; color:#000; }
.playground-link { background:none; border:0; padding:0; color: var(--antdx-text); cursor:pointer; text-align:left; font:inherit; }
.playground-link:hover { color: var(--antdx-color-primary); }
.playground-guide-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap:10px; }
.playground-guide-card { display:flex; flex-direction:column; align-items:flex-start; gap:6px; padding: 12px; border:1px solid var(--antdx-border); border-radius:10px; background: var(--antdx-component-bg); cursor:pointer; text-align:left; font:inherit; color: var(--antdx-text); }
.playground-guide-card:hover { border-color: var(--antdx-color-primary); transform: translateY(-1px); }
.playground-guide-card h4 { margin: 2px 0; font-size: 14px; }
.playground-guide-card p { margin: 0; color: var(--antdx-text-secondary); font-size: 12px; }
.playground-bottom { max-width: 780px; width: 100%; margin: 12px auto 0; display:flex; flex-direction:column; gap: 10px; }
.playground-prompts-row { display:flex; flex-wrap:wrap; gap: 8px; }
.playground-prompt-chip { display:inline-flex; align-items:center; gap:6px; padding:6px 12px; border-radius:999px; border:1px solid var(--antdx-border); background: var(--antdx-component-bg); color: var(--antdx-text-secondary); cursor:pointer; font:inherit; font-size:12px; }
.playground-prompt-chip:hover { color: var(--antdx-color-primary); border-color: var(--antdx-color-primary); }

/* Copilot: workarea + collapsible drawer */
.playground-copilot { height: calc(100vh - 220px); min-height: 580px; }
.playground-workarea { flex:1; display:flex; flex-direction:column; min-width:0; transition: flex .3s ease; }
.playground-workarea-wide { flex: 1 1 100%; }
.playground-work-header { display:flex; align-items:center; justify-content:space-between; padding: 12px 18px; border-bottom: 1px solid var(--antdx-border); }
.playground-work-title { display:flex; align-items:center; gap:10px; color: var(--antdx-text); }
.playground-copilot-toggle { padding: 6px 14px; border-radius: 999px; border:0; background: linear-gradient(135deg,#1677ff,#9254de); color:#fff; cursor:pointer; font-weight:600; }
.playground-work-body { flex:1; overflow:auto; padding: 24px clamp(16px, 4vw, 48px); max-width: 920px; width: 100%; align-self:center; }
.playground-copilot-panel { width: 400px; flex-shrink: 0; display:flex; flex-direction:column; border-left: 1px solid var(--antdx-border); background: var(--antdx-page-bg); }
.playground-copilot-header { display:flex; align-items:center; justify-content:space-between; padding: 12px 14px; border-bottom: 1px solid var(--antdx-border); }
.playground-copilot-title { font-weight: 700; color: var(--antdx-text); }
.playground-copilot-actions { display:flex; gap:6px; }
.playground-copilot-list { flex:1; overflow:auto; padding: 14px; display:flex; flex-direction:column; gap: 12px; }
.playground-copilot-footer { padding: 10px 14px 14px; border-top: 1px solid var(--antdx-border); display:flex; flex-direction:column; gap: 8px; }

@media (max-width: 900px) {
    .playground-copilot-panel { width: 320px; }
    .playground-side { width: 220px; }
}