/* AI 模块构建器视图样式 */

.builder-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
    min-height: calc(100vh - 80px);
}

/* ============ 侧边栏 ============ */
/* 会话历史 */
.builder-sessions-card {
    flex-shrink: 0;
}

.builder-icon-btn {
    margin-left: auto;
    width: 26px;
    height: 26px;
    border: none;
    border-radius: 7px;
    background: rgba(var(--primary-rgb), 0.12);
    color: var(--primary);
    cursor: pointer;
    font-size: 0.72rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.builder-icon-btn:hover {
    background: rgba(var(--primary-rgb), 0.22);
}

.builder-sessions-list {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    overflow-y: auto;
}

.builder-session-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.6rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
    border: 1px solid transparent;
}

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

.builder-session-item.active {
    background: rgba(var(--primary-rgb), 0.1);
    border-color: rgba(var(--primary-rgb), 0.25);
}

.builder-session-item > i {
    color: var(--text-secondary);
    font-size: 0.72rem;
    flex-shrink: 0;
}

.builder-session-item.active > i {
    color: var(--primary);
}

.builder-session-title {
    flex: 1;
    font-size: 0.8rem;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.builder-session-del {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.7rem;
    padding: 2px;
    border-radius: 4px;
    opacity: 0;
    transition: var(--transition);
}

.builder-session-item:hover .builder-session-del,
.builder-session-item.active .builder-session-del {
    opacity: 0.7;
}

.builder-session-del:hover {
    opacity: 1;
    color: #ef4444;
}

/* 会话历史 */
.builder-files-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow-y: auto;
    padding-right: 4px;
}

/* 旧名兼容 */
.builder-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow-y: auto;
    padding-right: 4px;
}

.builder-config-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.1rem 1.2rem;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
}

.builder-files-card {
    flex-shrink: 0;
}

.builder-config-title {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.85rem;
}

.builder-config-title i {
    color: var(--primary);
}

.builder-files-count {
    margin-left: auto;
    background: rgba(var(--primary-rgb), 0.12);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.1rem 0.55rem;
    border-radius: 999px;
}

.builder-config-body {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.builder-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.builder-field > span {
    font-size: 0.82rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.builder-field input[type="text"],
.builder-field input[type="password"] {
    width: 100%;
    padding: 0.5rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.88rem;
    font-family: "SF Mono", "Fira Code", Consolas, monospace;
    transition:
        border-color 0.2s,
        box-shadow 0.2s;
}

.builder-field input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.12);
}

.builder-key-row {
    position: relative;
    display: flex;
    align-items: center;
}

.builder-key-row input {
    padding-right: 2.2rem;
}

/* 隐藏 Edge/Windows 密码框原生的“显示密码”小眼睛，避免与自定义眼睛重复 */
.builder-key-row input::-ms-reveal,
.builder-key-row input::-ms-clear {
    display: none;
}

.builder-toggle-eye {
    position: absolute;
    right: 0.6rem;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.builder-toggle-eye:hover {
    color: var(--primary);
}

.builder-check {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    cursor: pointer;
    margin-top: 0.15rem;
}

.builder-check input {
    cursor: pointer;
    accent-color: var(--primary);
}

/* 文档状态 */
.builder-docs-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    padding: 0.5rem 0.7rem;
    background: var(--bg);
    border-radius: 8px;
}

.builder-docs-status.ready {
    color: var(--accent);
}

.builder-docs-status.empty {
    color: var(--text-secondary);
    opacity: 0.7;
}

.builder-docs-status i {
    font-size: 0.8rem;
}

.builder-docs-status.ready i {
    color: var(--accent);
}

.builder-docs-btn {
    width: 100%;
    padding: 0.55rem;
    font-size: 0.85rem;
    justify-content: center;
}

.builder-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
    opacity: 0.85;
}

/* 文件清单 */
.builder-files-list {
    flex: 1;
    overflow-y: auto;
    margin: 0.25rem 0 0.75rem;
    min-height: 60px;
}

.builder-empty {
    font-size: 0.8rem;
    color: var(--text-secondary);
    opacity: 0.6;
    text-align: center;
    padding: 1rem 0;
    margin: 0;
}

.builder-file-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.6rem;
    border-radius: 6px;
    font-size: 0.82rem;
    color: var(--text);
    font-family: "SF Mono", "Fira Code", Consolas, monospace;
    transition: background 0.15s;
}

.builder-file-item:hover {
    background: var(--bg);
}

.builder-file-item i {
    color: var(--primary);
    font-size: 0.75rem;
}

.builder-file-item .builder-file-size {
    margin-left: auto;
    color: var(--text-secondary);
    font-size: 0.72rem;
    opacity: 0.7;
}

.builder-download-btn {
    width: 100%;
    padding: 0.6rem;
    font-size: 0.88rem;
    justify-content: center;
}

.builder-download-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none !important;
}

/* “查看全部”按钮 */
.builder-view-all-btn {
    width: 100%;
    border: none;
    background: transparent;
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.45rem 0.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    font-family: inherit;
    border-radius: 8px;
    margin-bottom: 0.4rem;
}

.builder-view-all-btn:hover {
    background: rgba(var(--primary-rgb), 0.08);
}

/* 文件查看模态窗 */
.builder-files-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.builder-files-modal-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-hover);
    width: 100%;
    max-width: 720px;
    height: 80vh;
    max-height: 600px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.builder-files-modal-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.9rem 1.1rem;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.builder-files-modal-title {
    flex: 1;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.builder-files-modal-back,
.builder-files-modal-close {
    border: none;
    background: var(--bg);
    color: var(--text-secondary);
    cursor: pointer;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.builder-files-modal-back:hover,
.builder-files-modal-close:hover {
    background: rgba(var(--primary-rgb), 0.12);
    color: var(--primary);
}

.builder-files-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 0.6rem;
}

/* 模态窗内的文件列表项 */
.builder-modal-file-item {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.6rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
    color: var(--text);
    font-size: 0.86rem;
}

.builder-modal-file-item:hover {
    background: var(--bg);
}

.builder-modal-file-item i {
    color: var(--primary);
    font-size: 0.8rem;
}

.builder-modal-file-item .builder-file-name {
    flex: 1;
    font-family: "SF Mono", "Fira Code", Consolas, monospace;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.builder-modal-file-item .builder-file-size {
    color: var(--text-secondary);
    font-size: 0.74rem;
    opacity: 0.7;
}

/* 文件内容查看 */
.builder-code-view {
    margin: 0;
    background: rgba(var(--dark-bg-rgb), 0.92);
    color: #e2e8f0;
    padding: 1rem 1.1rem;
    border-radius: 10px;
    overflow: auto;
    font-family: "SF Mono", "Fira Code", Consolas, monospace;
    font-size: 0.8rem;
    line-height: 1.55;
    white-space: pre;
    min-height: 100%;
    box-sizing: border-box;
}

/* 确认模态窗 */
.builder-confirm-card {
    max-width: 400px;
    height: auto;
    padding: 1.2rem 1.3rem;
}

.builder-confirm-msg {
    font-size: 0.9rem;
    color: var(--text);
    margin: 0 0 1rem;
    line-height: 1.55;
}

.builder-confirm-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

/* 滚动到顶部/底部按钮 */
.builder-scroll-btn {
    position: absolute;
    right: 12px;
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.builder-scroll-btn.visible {
    opacity: 0.85;
    pointer-events: auto;
}

.builder-scroll-btn:hover {
    opacity: 1;
    color: var(--primary);
    border-color: var(--primary);
}

.builder-scroll-up {
    top: 12px;
}

.builder-scroll-down {
    top: 52px;
}

/* ============ 对话区 ============ */
.builder-chat {
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
    overflow: hidden;
    min-height: 0;
    position: relative;
}

.builder-chat-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--card-bg);
}

.builder-chat-title-wrap {
    min-width: 0;
}

.builder-chat-title-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.builder-chat-header .section-title {
    font-size: 1.25rem;
    margin: 0;
}

.builder-chat-header .section-subtitle {
    font-size: 0.82rem;
    margin: 0.15rem 0 0;
    color: var(--text-secondary);
}

/* 阶段切换胶囊（两段式） */
.builder-phase-toggle {
    display: inline-flex;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 2px;
    gap: 2px;
}

.builder-phase-seg {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.74rem;
    font-weight: 600;
    padding: 0.25rem 0.85rem;
    border-radius: 999px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    white-space: nowrap;
}

.builder-phase-seg:hover:not(.active) {
    color: var(--text);
}

.builder-phase-seg.active[data-phase="plan"] {
    background: rgba(245, 158, 11, 0.16);
    color: #b45309;
}

.builder-phase-seg.active[data-phase="generate"] {
    background: rgba(var(--accent-rgb), 0.18);
    color: var(--accent);
}

/* 设置页内的构建器输入样式 */
.builder-setting-field {
    margin-bottom: 0.85rem;
}

.builder-setting-field > label {
    display: block;
    font-size: 0.82rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.35rem;
}

.builder-setting-input {
    width: 100%;
    padding: 0.5rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.88rem;
    font-family: "SF Mono", "Fira Code", Consolas, monospace;
    transition:
        border-color 0.2s,
        box-shadow 0.2s;
}

.builder-setting-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.12);
}

/* 配置模态窗内容微调 */
#builder-config-modal .builder-files-modal-card {
    max-width: 460px;
    height: auto;
    max-height: 90vh;
}

#builder-config-modal .builder-files-modal-body {
    padding: 1rem 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

#builder-config-modal .builder-setting-field:last-of-type {
    margin-bottom: 0;
}

#builder-config-modal .toggle-setting {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.4rem 0;
}

#builder-config-modal .toggle-setting label {
    font-size: 0.82rem;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
}

#builder-config-modal .setting-description {
    margin-top: 0.5rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
    font-size: 0.78rem;
    line-height: 1.5;
}

#builder-config-modal .setting-description a {
    color: var(--primary);
}

/* 用户消息保留换行，且无头像时右对齐只有气泡 */
.builder-msg-user .builder-msg-content {
    white-space: pre-wrap;
}

.builder-msg-user {
    margin-right: 0;
}

.builder-clear-btn {
    flex-shrink: 0;
    padding: 0.4rem 0.9rem;
    font-size: 0.82rem;
}

.builder-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    scroll-behavior: smooth;
    background-color: var(--bg);
    background-image: url("../img/eris_bg.png");
    background-repeat: repeat-y;
    background-size: 100% auto;
    background-position: top center;
    background-attachment: scroll;
}

/* 系统提示消息（阶段切换等） */
.builder-system-msg {
    align-self: center;
    font-size: 0.78rem;
    color: var(--text-secondary);
    background: var(--bg);
    border: 1px dashed var(--border);
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    opacity: 0.85;
}

/* 消息气泡 */
.builder-msg {
    display: flex;
    gap: 0.75rem;
    max-width: 85%;
    animation: builderMsgIn 0.25s ease-out;
}

@keyframes builderMsgIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.builder-msg-user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.builder-msg-avatar {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
}

.builder-msg-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.builder-msg-content {
    padding: 0.7rem 1rem;
    border-radius: 14px;
    font-size: 0.9rem;
    line-height: 1.6;
    word-break: break-word;
}

.builder-msg-bot .builder-msg-content {
    background: var(--bg);
    color: var(--text);
    border-top-left-radius: 4px;
}

.builder-msg-user .builder-msg-content {
    background: var(--primary);
    color: white;
    border-top-right-radius: 4px;
}

.builder-msg-content p {
    margin: 0 0 0.5rem;
}

.builder-msg-content p:last-child {
    margin-bottom: 0;
}

.builder-msg-content pre {
    background: rgba(var(--dark-bg-rgb), 0.9);
    color: #e2e8f0;
    padding: 0.6rem 0.8rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0.5rem 0;
    font-size: 0.8rem;
}

.builder-msg-content code {
    font-family: "SF Mono", "Fira Code", Consolas, monospace;
    font-size: 0.82em;
}

.builder-msg-content :not(pre) > code {
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary);
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
}

.builder-msg-user .builder-msg-content :not(pre) > code {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.builder-msg-content ul,
.builder-msg-content ol {
    margin: 0.4rem 0 0.4rem 1.2rem;
}

.builder-msg-content a {
    color: var(--primary);
}

/* 进度项 */
.builder-progress {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    margin: 0.3rem 0;
    align-self: flex-start;
    max-width: 85%;
}

.builder-progress-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: "SF Mono", "Fira Code", Consolas, monospace;
    padding: 0.4rem 0.7rem;
    background: var(--bg);
    border-radius: 8px;
    border-left: 3px solid var(--text-secondary);
}

.builder-progress-item i {
    font-size: 0.7rem;
    width: 14px;
    text-align: center;
}

.builder-progress-item.search {
    border-left-color: #f59e0b;
}
.builder-progress-item.search i {
    color: #f59e0b;
}
.builder-progress-item.read {
    border-left-color: var(--accent);
}
.builder-progress-item.read i {
    color: var(--accent);
}
.builder-progress-item.write {
    border-left-color: var(--primary);
}
.builder-progress-item.write i {
    color: var(--primary);
}
.builder-progress-item.done {
    border-left-color: var(--accent);
    color: var(--accent);
    font-weight: 600;
}
.builder-progress-item.done i {
    color: var(--accent);
}

/* 打字指示器 */
.builder-typing {
    display: inline-flex;
    gap: 4px;
    padding: 0.7rem 1rem;
    background: var(--bg);
    border-radius: 14px;
    border-top-left-radius: 4px;
    align-self: flex-start;
}

.builder-typing span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-secondary);
    opacity: 0.5;
    animation: builderTyping 1.2s infinite;
}

.builder-typing span:nth-child(2) {
    animation-delay: 0.2s;
}
.builder-typing span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes builderTyping {
    0%,
    60%,
    100% {
        opacity: 0.3;
        transform: translateY(0);
    }
    30% {
        opacity: 1;
        transform: translateY(-3px);
    }
}

/* 提问表单卡片 */
.builder-question {
    align-self: flex-start;
    max-width: 85%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    border-top-left-radius: 4px;
    padding: 0.9rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    animation: builderMsgIn 0.25s ease-out;
}

.builder-question-block {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.builder-question-block:last-of-type {
    border-bottom: none;
    padding-bottom: 0;
}

.builder-question-text {
    font-size: 0.88rem;
    color: var(--text);
    line-height: 1.5;
}

.builder-question-text p {
    margin: 0;
}

.builder-question-options {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.builder-question-opt {
    text-align: left;
    padding: 0.5rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text);
    font-size: 0.84rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.builder-question-opt:hover:not(:disabled) {
    border-color: var(--primary);
    background: rgba(var(--primary-rgb), 0.06);
}

.builder-question-opt.selected {
    border-color: var(--primary);
    background: rgba(var(--primary-rgb), 0.12);
    color: var(--primary);
    font-weight: 600;
}

.builder-question-opt:disabled {
    cursor: default;
    opacity: 0.6;
}

.builder-question-opt.builder-question-custom {
    color: var(--text-secondary);
    font-style: italic;
}

.builder-question-input-wrap {
    display: flex;
    gap: 0.4rem;
}

.builder-question-input {
    flex: 1;
    padding: 0.5rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text);
    font-size: 0.84rem;
    font-family: inherit;
}

.builder-question-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.12);
}

.builder-question-input:disabled {
    opacity: 0.6;
}

.builder-question-submit {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

.builder-question-submit-all {
    align-self: flex-end;
    padding: 0.55rem 1.3rem;
    font-size: 0.85rem;
}

/* 输入栏 */
.builder-input-bar {
    display: flex;
    gap: 0.6rem;
    padding: 0.9rem 1.5rem;
    border-top: 1px solid var(--border);
    background: var(--card-bg);
}

.builder-input {
    flex: 1;
    resize: none;
    max-height: 140px;
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.9rem;
    line-height: 1.5;
    font-family: inherit;
    overflow: hidden;
    transition:
        border-color 0.2s,
        box-shadow 0.2s;
}

.builder-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.12);
}

.builder-send {
    align-self: flex-end;
    padding: 0.6rem 1.3rem;
    flex-shrink: 0;
}

.builder-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* 发送按钮 + 模式下拉组合 */
.builder-send-wrap {
    position: relative;
    flex-shrink: 0;
    align-self: flex-end;
}

/* 模式标号：嵌入发送按钮内部 */
.builder-send-mode-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    margin-left: 0.55rem;
    padding-left: 0.55rem;
    border-left: 1px solid rgba(255, 255, 255, 0.3);
    font-size: 0.68rem;
    opacity: 0.92;
    cursor: pointer;
    line-height: 1;
}

.builder-send-mode-tag:hover {
    opacity: 1;
}

.builder-send-mode-tag i {
    font-size: 0.62rem;
}

.builder-send-mode-menu {
    position: absolute;
    bottom: calc(100% + 6px);
    right: 0;
    min-width: 170px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow-hover);
    padding: 0.3rem;
    display: none;
    flex-direction: column;
    gap: 0.15rem;
    z-index: 50;
}

.builder-send-mode-menu.open {
    display: flex;
}

.builder-send-mode-opt {
    border: none;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    padding: 0.45rem 0.6rem;
    border-radius: 6px;
    font-size: 0.82rem;
    font-family: inherit;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.15s;
}

.builder-send-mode-opt:hover {
    background: var(--bg);
}

.builder-send-mode-opt i {
    font-size: 0.7rem;
    color: var(--primary);
    width: 14px;
    visibility: hidden;
}

.builder-send-mode-opt.active i {
    visibility: visible;
}

/* ============ 响应式 ============ */
@media (max-width: 900px) {
    .builder-layout {
        grid-template-columns: 1fr;
        height: auto;
        min-height: calc(100vh - 80px);
    }

    .builder-sidebar {
        order: 2;
        max-height: none;
    }

    .builder-layout {
        min-height: auto;
    }

    .builder-chat {
        order: 1;
        min-height: 500px;
        height: 70vh;
    }

    .builder-files-card {
        min-height: auto;
    }

    /* 移动端隐藏发送模式标号 */
    .builder-send-mode-tag {
        display: none;
    }

    /* 标题栏紧凑 */
    .builder-chat-header {
        padding: 0.7rem 0.85rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .builder-chat-title-row {
        gap: 0.4rem;
    }

    .builder-chat-header .section-title {
        font-size: 1.05rem;
    }

    .builder-chat-header .section-subtitle {
        font-size: 0.75rem;
    }

    .builder-phase-seg {
        padding: 0.2rem 0.6rem;
        font-size: 0.7rem;
    }

    .builder-clear-btn {
        padding: 0.3rem 0.7rem;
        font-size: 0.75rem;
    }

    .builder-messages {
        padding: 0.8rem 0.85rem;
    }

    .builder-input-bar {
        padding: 0.6rem 0.85rem;
        gap: 0.45rem;
    }

    .builder-msg {
        max-width: 95%;
    }

    /* 提问卡片不溢出 */
    .builder-question {
        max-width: 100%;
        padding: 0.65rem 0.75rem;
    }

    .builder-question-opt {
        font-size: 0.78rem;
        padding: 0.4rem 0.6rem;
    }
}

@media (max-width: 560px) {
    .builder-layout {
        padding: 0.75rem;
        gap: 0.75rem;
    }

    .builder-chat-header {
        padding: 0.85rem 1rem;
    }

    .builder-messages {
        padding: 0.85rem 1rem;
    }

    .builder-input-bar {
        padding: 0.7rem 1rem;
    }

    .builder-msg {
        max-width: 95%;
    }

    .builder-chat-header .section-title {
        font-size: 1.05rem;
    }
}