/* ============================================
   电商AI助手 — 全局样式
   ============================================ */

:root {
    --sidebar-width: 280px;
    --sidebar-collapsed: 0px;
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --primary-light: #EEF2FF;
    --sidebar-bg: #1E1B3D;
    --sidebar-text: #B4AFD4;
    --sidebar-text-active: #FFFFFF;
    --sidebar-hover: #2D2A50;
    --sidebar-active: #4F46E5;
    --bg: #F8F9FC;
    --card-bg: #FFFFFF;
    --border: #E5E7EB;
    --text: #1F2937;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --danger: #EF4444;
    --success: #10B981;
    --warning: #F59E0B;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,.12);
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* ============================================
   左侧栏 (Sidebar)
   ============================================ */

.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    transition: width var(--transition), min-width var(--transition);
    position: relative;
    z-index: 10;
    border-right: 1px solid rgba(255,255,255,.06);
}

.sidebar.collapsed {
    width: 0;
    min-width: 0;
    overflow: hidden;
    border-right: none;
}

/* Logo */
.sidebar-header {
    display: flex;
    align-items: center;
    padding: 20px 20px 16px;
    gap: 12px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.logo {
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.logo-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--sidebar-text-active);
    flex: 1;
    white-space: nowrap;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--sidebar-text);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
    transition: opacity var(--transition);
}

.sidebar-toggle:hover {
    opacity: 1;
    background: var(--sidebar-hover);
}

/* 菜单 */
.sidebar-menu {
    flex: 1;
    overflow-y: auto;
    padding: 12px 12px 0;
    display: flex;
    flex-direction: column;
}

.sidebar-menu::-webkit-scrollbar {
    width: 4px;
}

.sidebar-menu::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,.15);
    border-radius: 4px;
}

.menu-section {
    margin-bottom: 6px;
}

.menu-section-title {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255,255,255,.35);
    padding: 8px 12px 6px;
}

.menu-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border: none;
    background: transparent;
    color: var(--sidebar-text);
    font-size: 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
}

.menu-item:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-text-active);
}

.menu-item.active {
    background: var(--sidebar-active);
    color: white;
}

.menu-item svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.menu-item.disabled-menu {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

.menu-item.disabled-menu:hover {
    background: transparent;
    color: var(--sidebar-text);
}

.menu-item.active svg {
    opacity: 1;
}

.menu-spacer {
    flex: 0 0 auto;
    height: 12px;
}

/* 历史记录 */
.history-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    transition: background var(--transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-item:hover {
    background: var(--sidebar-hover);
}

.history-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255,255,255,.3);
    flex-shrink: 0;
}

.history-item:hover .history-dot {
    background: var(--primary);
}

.history-item-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 解决 flex 子元素溢出问题 */
.history-item-info {
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.history-item-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
    visibility: hidden;
}

.history-item:hover .history-item-actions {
    visibility: visible;
}

.history-action-btn {
    background: none;
    border: none;
    color: var(--sidebar-text);
    cursor: pointer;
    padding: 2px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
    transition: all var(--transition);
}

.history-action-btn:hover {
    opacity: 1;
    background: rgba(255,255,255,.1);
    color: var(--sidebar-text-active);
}

.history-rename-input {
    flex: 1;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 4px;
    color: var(--sidebar-text-active);
    font-size: 13px;
    padding: 2px 6px;
    outline: none;
    min-width: 0;
}

/* 底部用户区 */
.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255,255,255,.08);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,.1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.avatar.logged-in {
    background: var(--primary);
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 1px;
    overflow: hidden;
}

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

.user-role {
    font-size: 11px;
    color: rgba(255,255,255,.4);
}

.sidebar-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 14px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-login {
    flex: 1;
    background: rgba(255,255,255,.1);
    color: var(--sidebar-text-active);
}

.btn-login:hover {
    background: rgba(255,255,255,.18);
}

.btn-recharge {
    flex: 1;
    background: var(--primary);
    color: white;
    justify-content: center;
}

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

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

.btn-primary {
    width: 100%;
    background: var(--primary);
    color: white;
    font-size: 15px;
    padding: 12px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-top: 8px;
}

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

.btn-block {
    width: 100%;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 13px;
    cursor: pointer;
    padding: 4px 0;
    transition: color var(--transition);
}

.btn-link:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.credits-display {
    font-size: 12px;
    color: rgba(255,255,255,.4);
    text-align: center;
}

.credits-display strong {
    color: var(--warning);
    font-size: 13px;
}

/* ============================================
   中间主内容区 (Main)
   ============================================ */

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg);
    min-width: 0;
    position: relative;
}

/* 工具栏 */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    gap: 12px;
}

.toolbar-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

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

.toolbar-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

.toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

/* 预览区 */
.preview-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.preview-area::-webkit-scrollbar {
    width: 6px;
}

.preview-area::-webkit-scrollbar-thumb {
    background: #D1D5DB;
    border-radius: 3px;
}

/* 欢迎页 */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
    min-height: 100%;
}

.welcome-icon {
    color: var(--text-muted);
    margin-bottom: 20px;
}

.welcome-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.welcome-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 36px;
}

.welcome-screen.hidden {
    display: none;
}

.hidden {
    display: none !important;
}

/* 快捷卡片 */
.quick-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    max-width: 650px;
    width: 100%;
}

.quick-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 22px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
}

.quick-card:hover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.quick-card-icon {
    font-size: 36px;
}

.quick-card-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

/* 消息容器 */
.messages-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.message {
    display: flex;
    width: 100%;
    animation: msgIn 0.3s ease-out;
    align-items: flex-start;
}

/* 默认（助手）：头像在左边，头像右间距 12px */
.message .message-avatar {
    margin-right: 12px;
    flex-shrink: 0;
}

/* 用户消息：内容靠右对齐 */
.message.user {
    justify-content: flex-end;
}

/* 电商主图模式静态提示（替换输入框） */
.chat-mode-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 20px;
    color: #94a3b8;
    font-size: 30px;
    line-height: 1.6;
    user-select: none;
    text-align: center;
}

.chat-mode-hint svg {
    flex-shrink: 0;
    opacity: 0.5;
    width: 20px;
    height: 20px;
}

/* 用户消息：头像固定在右侧，气泡在头像左侧 */
.message.user .message-avatar {
    margin-right: 0;
    margin-left: 12px;
}

.message.user .message-body {
    max-width: calc(100% - 48px);
}

@keyframes msgIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* 电商主图三方案横向排列 */
.message-ecom-row {
    display: flex;
    gap: 8px;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 4px 0;
}

.msg-ecom-image-item {
    flex: 0 0 auto;
    border-radius: 8px;
    overflow: hidden;
    background: #1a1a2e;
    border: 1px solid #2d2d4a;
    cursor: pointer;
    transition: border-color 0.2s;
}

.msg-ecom-image-item:hover {
    border-color: var(--primary);
}

.msg-ecom-image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.msg-ecom-image-failed {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #94a3b8;
    font-size: 12px;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
}

.message.assistant .message-avatar {
    background: var(--primary-light);
    color: var(--primary);
}

.message.user .message-avatar {
    background: #E5E7EB;
    color: var(--text);
}

.message-content {
    max-width: 75%;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
}

.message.assistant .message-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-top-left-radius: 4px;
    box-shadow: var(--shadow);
}

.message.user .message-content {
    background: var(--primary);
    color: white;
    border-top-right-radius: 4px;
    max-width: 100%;
}

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

.msg-action-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    border-radius: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.msg-action-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}

/* 资源过期提醒 */
.msg-expiry-warning {
    display: block;
    margin-top: 6px;
    font-size: 11px;
    color: var(--warning);
    opacity: 0.85;
}


/* 详情页流式生成：实时预览网格 */
.detail-streaming .message-body {
    max-width: 100%;
}

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

.detail-stream-images {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.detail-stream-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: #f8f9fa;
    transition: transform 0.2s, box-shadow 0.2s;
}

.detail-stream-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.detail-stream-label {
    position: absolute;
    top: 6px;
    left: 6px;
    background: rgba(0,0,0,0.65);
    color: #fff;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 4px;
    z-index: 2;
    pointer-events: none;
}

.detail-stream-failed {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff0f0;
    border-color: #ffcccc;
}

.detail-stream-error {
    font-size: 12px;
    color: #e53e3e;
}

/* 生成资源预览（图片/视频嵌入消息中） */
.msg-generated-preview {
    margin-top: 12px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.generated-img {
    width: 100%;
    height: 100%;
    display: block;
    cursor: pointer;
    transition: opacity 0.2s;
    object-fit: cover;
}

.generated-img:hover {
    opacity: 0.9;
}

.generated-video {
    width: 100%;
    max-width: 500px;
    display: block;
    outline: none;
}

/* 拼接图预览（纵向长图，自适应高度） */
.msg-stitched-preview {
    position: relative;
    max-width: 400px;
    width: auto !important;
    height: auto !important;
    display: inline-block;
}

.stitch-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.65);
    color: #fff;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    z-index: 1;
    pointer-events: none;
    backdrop-filter: blur(4px);
}

.generated-stitched-img {
    width: 100%;
    height: auto !important;
    display: block;
    cursor: pointer;
    transition: opacity 0.2s;
    object-fit: contain;
}

.generated-stitched-img:hover {
    opacity: 0.9;
}

/* 生成状态横幅（违规/失败提示） */
.status-banner {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
}
.status-banner.status-violation {
    background: #FEF3C7;
    color: #D97706;
    border: 1px solid #FCD34D;
}
.status-banner.status-failed {
    background: #FEE2E2;
    color: #DC2626;
    border: 1px solid #FECACA;
}
.status-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 4px 0 0 0;
    line-height: 1.5;
}

/* 结果展示区 */
.result-display {
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 12px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    border-top-left-radius: 4px;
    max-width: 75%;
}

.typing-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: typingBounce 1.4s infinite;
}

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

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-6px); }
}

/* 任务处理中指示器 */
.processing-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    border-top-left-radius: 4px;
    max-width: 75%;
}

.processing-spinner {
    animation: spin 1s linear infinite;
    color: var(--primary);
    flex-shrink: 0;
}

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

.processing-text {
    font-size: 14px;
    color: var(--text);
    white-space: nowrap;
}

.processing-timer {
    font-size: 13px;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

/* ============================================
   底部聊天输入区 (Chat Bar)
   ============================================ */

.chat-bar {
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    padding: 24px 48px 16px;
}

.chat-bar-inner {
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* 按钮操作栏：放在输入框下方 */
.chat-bar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.input-options-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    min-width: 0;
}

.input-actions-left,
.input-actions-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.chat-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition);
}

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

/* 画质下拉锚点 */
.dropdown-anchor {
    position: relative;
}

/* 画质 / 比例下拉按钮 */
.chat-option-btn {
    display: flex;
    align-items: baseline;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text-secondary);
    border-radius: 24px;
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.chat-option-btn svg {
    align-self: center;
}

.chat-option-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

/* 画质提示语 */
.quality-hint {
    font-size: 14px;
    color: #f59e0b;
    white-space: nowrap;
    margin-right: 8px;
    line-height: 1;
}
.dropdown-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.chat-option-btn .option-value {
    font-weight: 700;
    color: var(--primary);
}

/* 消耗积分标签 */
.cost-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #92400e;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    border: 1px solid #fcd34d;
    flex-shrink: 0;
}

.dropdown-menu {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 0;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 120px;
    max-height: 320px;
    overflow-y: auto;
    z-index: 20;
    opacity: 0;
    pointer-events: none;
    transform: translateY(6px);
    transition: all var(--transition);
}

.dropdown-menu.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.dropdown-item {
    padding: 10px 18px;
    font-size: 15px;
    color: var(--text);
    cursor: pointer;
    transition: background var(--transition);
    white-space: nowrap;
}

.dropdown-item:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.dropdown-item.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

.model-cost-tag {
    font-size: 11px;
    color: #999;
    margin-left: 6px;
    font-weight: normal;
}

.input-wrapper {
    width: 100%;
    position: relative;
}

.chat-input {
    width: 100%;
    min-height: 100px;
    max-height: 200px;
    padding: 18px 28px;
    border: 1px solid var(--border);
    border-radius: 44px;
    font-size: 20px;
    font-family: inherit;
    line-height: 1.5;
    resize: none;
    outline: none;
    background: var(--bg);
    color: var(--text);
    transition: border-color var(--transition);
}

.chat-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,.1);
}

.chat-input::placeholder {
    color: var(--text-muted);
}

/* 文件缩略图区域 */
.file-thumbnails {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    overflow-x: auto;
    max-width: 280px;
    padding: 2px 0;
}

.file-thumbnails::-webkit-scrollbar {
    height: 3px;
}

.file-thumbnails::-webkit-scrollbar-thumb {
    background: #D1D5DB;
    border-radius: 2px;
}

.file-thumb-item {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    cursor: pointer;
    flex-shrink: 0;
}

.file-thumb-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    color: var(--text-secondary);
    transition: all var(--transition);
    overflow: hidden;
}

.file-thumb-icon.image {
    border-color: #10B981;
    color: #10B981;
    background: #ECFDF5;
}

.file-thumb-icon.video {
    border-color: #8B5CF6;
    color: #8B5CF6;
    background: #F5F3FF;
}

.file-thumb-icon.document {
    border-color: #3B82F6;
    color: #3B82F6;
    background: #EFF6FF;
}

.file-thumb-icon.spreadsheet {
    border-color: #10B981;
    color: #10B981;
    background: #ECFDF5;
}

.file-thumb-item:hover .file-thumb-icon {
    transform: scale(1.1);
    border-color: var(--primary);
}

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

.file-thumb-name {
    font-size: 9px;
    color: var(--text-muted);
    max-width: 46px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
}

.file-thumb-remove {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: none;
    background: var(--danger);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition);
    padding: 0;
}

.file-thumb-item:hover .file-thumb-remove {
    opacity: 1;
}

/* 上传按钮加载动画 */
.chat-action-btn.uploading {
    animation: uploadPulse 1s infinite;
}

@keyframes uploadPulse {
    0%, 100% { color: var(--text-muted); }
    50% { color: var(--primary); }
}

.upload-spinner {
    animation: spin 1s linear infinite;
}

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

/* 消息气泡下方的文件附件图标 */
.message-files {
    display: flex;
    gap: 8px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.msg-file-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    cursor: pointer;
    transition: transform var(--transition);
}

.msg-file-item:hover {
    transform: scale(1.08);
}

.msg-file-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    color: var(--text-secondary);
    overflow: hidden;
}

.msg-file-icon .msg-file-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.msg-file-item.image .msg-file-icon {
    border-color: #10B981;
    color: #10B981;
    background: #ECFDF5;
}

.msg-file-item.video .msg-file-icon {
    border-color: #8B5CF6;
    color: #8B5CF6;
    background: #F5F3FF;
}

.msg-file-item.document .msg-file-icon {
    border-color: #3B82F6;
    color: #3B82F6;
    background: #EFF6FF;
}

.msg-file-item.spreadsheet .msg-file-icon {
    border-color: #10B981;
    color: #10B981;
    background: #ECFDF5;
}

.msg-file-name {
    font-size: 9px;
    color: var(--text-muted);
    max-width: 52px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
}

.chat-send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border: none;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
}

.chat-send-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

.chat-send-btn:active {
    transform: scale(0.95);
}

.chat-hint {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 8px;
}

/* 任务状态指示器 */
.task-status-indicator {
    text-align: center;
    font-size: 12px;
    color: var(--primary);
    padding: 4px 12px;
    margin-bottom: 4px;
    animation: pulse-text 1.5s ease-in-out infinite;
}

@keyframes pulse-text {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ============================================
   弹窗 (Modal)
   ============================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: var(--card-bg);
    border-radius: var(--radius);
    width: 440px;
    max-width: 90vw;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: transform var(--transition);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 0;
}

#rechargeModal .modal-header {
    justify-content: center;
}

#rechargeModal .modal-header h2 {
    text-align: center;
    flex: 1;
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 700;
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg);
    color: var(--text-secondary);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition);
}

.modal-close:hover {
    background: #E5E7EB;
    color: var(--text);
}

.modal-body {
    padding: 20px 24px 24px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.form-group input[type="tel"],
.form-group input[type="text"],
.form-group input[type="password"],
.form-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition);
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,.1);
}

/* 充值相关 */
.balance-info {
    text-align: center;
    padding: 16px;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
}

.balance-info strong {
    font-size: 24px;
    color: var(--primary);
    margin: 0 6px;
}

.recharge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 16px;
}

.recharge-option {
    cursor: pointer;
}

.recharge-option input {
    display: none;
}

.recharge-card {
    padding: 14px 10px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: all var(--transition);
    position: relative;
}

.recharge-option input:checked + .recharge-card {
    border-color: var(--primary);
    background: var(--primary-light);
}

.recharge-option.popular .recharge-card {
    border-color: var(--warning);
}

.recharge-option.popular input:checked + .recharge-card {
    border-color: var(--primary);
    background: var(--primary-light);
}

.recharge-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--warning);
    color: white;
    font-size: 11px;
    padding: 2px 10px;
    border-radius: 10px;
    font-weight: 600;
}

.recharge-amount {
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.recharge-price {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2px;
}

.recharge-bonus {
    font-size: 11px;
    color: var(--success);
}

.payment-methods {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 12px;
}

.pay-icon {
    width: 22px;
    height: 22px;
    border-radius: 4px;
}

/* 兑换码输入 */
.redeem-input-group {
    margin-bottom: 20px;
}

.redeem-input-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.redeem-input-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-family: inherit;
    letter-spacing: 1px;
    outline: none;
    transition: border-color var(--transition);
    text-align: center;
}

.redeem-input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,.1);
}

.redeem-input-group input::placeholder {
    color: #9CA3AF;
    letter-spacing: 0;
}

.pay-text {
    font-size: 12px;
    color: var(--text-muted);
}

/* ============================================
   Toast
   ============================================ */

.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    padding: 12px 24px;
    background: var(--text);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    z-index: 200;
    transition: transform var(--transition);
    box-shadow: var(--shadow-lg);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: #F59E0B; }

/* 手机端能力切换标签栏（默认隐藏，手机端显示） */
.mobile-capability-tabs {
    display: none;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 6px;
    padding: 4px 0;
    flex-shrink: 0;
}

.mobile-capability-tabs::-webkit-scrollbar {
    height: 0;
}

.cap-tab {
    flex-shrink: 0;
    padding: 6px 14px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-secondary);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.cap-tab:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}

.cap-tab.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ============================================
   响应式 — 手机端适配
   ============================================ */

/* 手机端断点：768px 以下 */
@media (max-width: 768px) {

    /* ---------- 侧栏：固定浮层 + 遮罩 ---------- */
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 50;
        width: 280px;
        min-width: 280px;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: none;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0,0,0,.35);
    }

    /* 侧栏遮罩层 */
    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,.45);
        z-index: 49;
        opacity: 0;
        transition: opacity 0.3s;
    }

    .sidebar-overlay.active {
        display: block;
        opacity: 1;
    }

    /* 手机端汉堡菜单按钮 */
    .mobile-menu-btn {
        display: flex !important;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border: none;
        background: transparent;
        color: var(--text-secondary);
        border-radius: var(--radius-sm);
        cursor: pointer;
        flex-shrink: 0;
    }

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

    /* ---------- 工具栏 ---------- */
    .toolbar {
        padding: 8px 12px;
        gap: 8px;
        flex-wrap: wrap;
    }

    .toolbar-btn {
        padding: 6px 10px;
        font-size: 12px;
    }

    .toolbar-btn span {
        display: none; /* 手机端隐藏按钮文字 */
    }

    .toolbar-title {
        font-size: 14px;
        flex: 1;
        text-align: center;
    }

    .toolbar-right {
        gap: 4px;
    }

    #btnNewSession span {
        display: none;
    }

    /* ---------- 预览区域 ---------- */
    .preview-area {
        padding: 12px;
    }

    .messages-container {
        max-width: 100%;
        gap: 12px;
    }

    .welcome-screen {
        padding: 20px 12px;
    }

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

    .welcome-desc {
        font-size: 13px;
        margin-bottom: 24px;
    }

    .quick-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .quick-card {
        padding: 14px 10px;
    }

    .quick-card-text {
        font-size: 12px;
    }

    /* ---------- 消息气泡 ---------- */
    .message-content {
        max-width: 90%;
        font-size: 13px;
        padding: 10px 14px;
    }

    .message-avatar {
        width: 30px;
        height: 30px;
    }

    .message-avatar svg {
        width: 16px;
        height: 16px;
    }

    .msg-generated-preview {
        max-width: 100% !important;
        width: 100% !important;
    }

    .generated-img {
        max-height: 300px;
        object-fit: contain;
    }

    .generated-video {
        max-width: 100%;
    }

    .msg-stitched-preview {
        max-width: 100% !important;
    }

    .message-actions {
        flex-wrap: wrap;
        gap: 6px;
    }

    .msg-action-btn {
        font-size: 11px;
        padding: 3px 7px;
    }

    /* ---------- 聊天输入区 ---------- */
    .chat-bar {
        padding: 10px 12px 8px;
    }

    .chat-bar-inner {
        gap: 8px;
    }

    .chat-input {
        min-height: 60px;
        max-height: 120px;
        padding: 14px 18px;
        border-radius: 24px;
        font-size: 16px;
    }

    .chat-bar-actions {
        gap: 6px;
        flex-wrap: wrap;
    }

    .chat-action-btn {
        width: 38px;
        height: 38px;
    }

    .chat-send-btn {
        width: 42px;
        height: 42px;
    }

    .chat-send-btn svg {
        width: 20px;
        height: 20px;
    }

    /* 输入区选项按钮组：手机端横向滚动 */
    .input-options-area {
        flex: 1 1 100%;
        order: 1;
        justify-content: flex-start;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 2px;
        gap: 4px;
    }

    .input-actions-left {
        gap: 4px;
        flex-shrink: 0;
        flex-wrap: wrap;
    }

    .chat-option-btn {
        padding: 6px 10px;
        font-size: 12px;
        border-radius: 16px;
        flex-shrink: 0;
    }

    /* 画质提示语：手机端允许换行 */
    .quality-hint {
        white-space: normal;
        font-size: 10px;
        margin-right: 4px;
        line-height: 1.3;
        max-width: 140px;
        flex-shrink: 0;
    }

    .dropdown-wrapper {
        flex-shrink: 0;
    }

    .cost-tag {
        font-size: 11px;
        padding: 4px 8px;
        flex-shrink: 0;
    }

    /* 文件缩略图区域 */
    .file-thumbnails {
        max-width: 180px;
        gap: 6px;
    }

    .file-thumb-icon {
        width: 32px;
        height: 32px;
        border-radius: 6px;
    }

    .file-thumb-name {
        font-size: 8px;
        max-width: 36px;
    }

    .chat-hint {
        font-size: 11px;
        margin-top: 4px;
    }

    /* ---------- 弹窗 ---------- */
    .modal {
        width: 92vw !important;
        max-width: 92vw !important;
        max-height: 88vh;
        margin: 0 4vw;
    }

    .modal-header {
        padding: 16px 18px 0;
    }

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

    .modal-body {
        padding: 16px 18px 20px;
    }

    .form-group label {
        font-size: 12px;
    }

    .form-input {
        padding: 8px 12px;
        font-size: 14px;
    }

    .btn-primary {
        font-size: 14px;
        padding: 10px;
    }

    /* 充值弹窗 */
    .recharge-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .recharge-card {
        padding: 10px 8px;
    }

    .recharge-amount {
        font-size: 12px;
    }

    .recharge-price {
        font-size: 14px;
    }

    .recharge-bonus {
        font-size: 10px;
    }

    .recharge-badge {
        font-size: 10px;
        padding: 1px 8px;
        top: -8px;
    }

    .balance-info {
        padding: 12px;
    }

    .balance-info strong {
        font-size: 20px;
    }

    /* ---------- Toast ---------- */
    .toast {
        top: 12px;
        padding: 10px 18px;
        font-size: 13px;
        max-width: 85vw;
        text-align: center;
    }

    /* ---------- 确认弹窗 ---------- */
    #confirmDialog .modal {
        width: 88vw !important;
    }

    /* ---------- 处理中指示器 ---------- */
    .processing-indicator,
    .typing-indicator {
        max-width: 95%;
    }

    .processing-text {
        font-size: 13px;
    }

    .processing-timer {
        font-size: 12px;
    }

    /* ---------- 下拉菜单 ---------- */
    .dropdown-menu {
        min-width: 100px;
        max-height: 240px;
        bottom: calc(100% + 6px);
        left: auto;
        right: 0;
    }

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

    /* ---------- 任务状态指示器 ---------- */
    .task-status-indicator {
        font-size: 11px;
        padding: 2px 10px;
    }

    /* ---------- 手机端能力切换标签栏 ---------- */
    .mobile-capability-tabs {
        display: flex;
    }

    .toolbar-title {
        display: none;
    }

    #detailStyleDropdownWrap .chat-option-btn {
        font-size: 11px;
        padding: 5px 8px;
        flex-shrink: 0;
    }
}

/* 小屏手机 (iPhone SE 等，375px 以下) */
@media (max-width: 400px) {
    .sidebar {
        width: 260px;
        min-width: 260px;
    }

    .welcome-title {
        font-size: 18px;
    }

    .quick-cards {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }

    .recharge-grid {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }

    .chat-input {
        font-size: 15px;
        padding: 12px 14px;
    }

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

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

    .message-content {
        font-size: 12px;
    }
}