/* ===== 全局样式 ===== */
* {
    -webkit-tap-highlight-color: transparent;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background: #f5f5f5;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    display: flex;
    flex-direction: column;
}

/* ===== 顶部栏 ===== */
.chat-title {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.online-count {
    font-size: 13px;
    opacity: 0.85;
}

/* ===== 消息容器 ===== */
.message-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 12px 8px;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
    background: #eceff1;
    /* Android 短信背景色 - 浅灰蓝 */
    background-image: 
        radial-gradient(ellipse at 20% 50%, rgba(207,216,220,0.4) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(207,216,220,0.3) 0%, transparent 50%);
}

.message-container::-webkit-scrollbar {
    width: 4px;
}

.message-container::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.15);
    border-radius: 2px;
}

/* ===== 消息列表 ===== */
.message-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding-bottom: 4px;
}

/* ===== 空状态 ===== */
.empty-hint {
    text-align: center;
    padding: 60px 20px;
    color: #90a4ae;
}

.empty-icon {
    font-size: 56px;
    margin-bottom: 12px;
    opacity: 0.6;
}

.empty-hint p {
    font-size: 15px;
    margin: 0;
}

/* ===== 加载更多按钮 ===== */
.load-more-wrap {
    text-align: center;
    padding: 4px 0 10px;
}

.load-more-btn {
    border-radius: 20px;
    font-size: 13px;
    padding: 4px 18px;
    text-transform: none;
    letter-spacing: 0;
}

/* ===== 时间分隔线 ===== */
.time-divider {
    text-align: center;
    margin: 10px 0 8px;
}

.time-divider span {
    display: inline-block;
    background: rgba(0,0,0,0.08);
    color: #546e7a;
    font-size: 12px;
    padding: 3px 12px;
    border-radius: 12px;
    letter-spacing: 0.3px;
}

/* ===== 消息气泡 - 基础 ===== */
.msg-row {
    display: flex;
    flex-direction: column;
    margin: 2px 4px;
    max-width: 85%;
    animation: msgIn 0.25s ease-out;
}

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

/* 收到的消息 - 左对齐 */
.msg-row.in {
    align-self: flex-start;
    align-items: flex-start;
}

/* 发出的消息 - 右对齐 */
.msg-row.out {
    align-self: flex-end;
    align-items: flex-end;
}

/* 发送者名称 */
.msg-sender {
    font-size: 12px;
    color: #78909c;
    margin-bottom: 2px;
    margin-left: 10px;
    font-weight: 500;
}

.msg-row.out .msg-sender {
    display: none;
}

/* ===== 气泡样式 ===== */
.msg-bubble {
    position: relative;
    padding: 10px 14px;
    border-radius: 18px;
    font-size: 15px;
    line-height: 1.5;
    word-wrap: break-word;
    word-break: break-word;
    max-width: 100%;
    box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

/* 收到的气泡 - 白色（类似 Android SMS 接收） */
.msg-row.in .msg-bubble {
    background: #ffffff;
    color: #212121;
    border-bottom-left-radius: 4px;
}

/* 发出的气泡 - 主题蓝色（类似 Android SMS 发送） */
.msg-row.out .msg-bubble {
    background: #1976D2;
    color: #ffffff;
    border-bottom-right-radius: 4px;
}

/* 连续消息：同一个人连续发送时去掉间距和圆角调整 */
.msg-row.continued .msg-sender {
    display: none;
}

.msg-row.continued {
    margin-top: 0;
}

/* ===== 消息元信息（时间、状态） ===== */
.msg-meta {
    font-size: 11px;
    margin-top: 2px;
    color: #90a4ae;
    padding: 0 10px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.msg-row.out .msg-meta {
    justify-content: flex-end;
}

/* ===== 引用回复样式 ===== */
.msg-quote {
    background: rgba(0,0,0,0.04);
    border-left: 3px solid rgba(0,0,0,0.06);
    padding: 6px 10px;
    margin-bottom: 6px;
    border-radius: 8px;
    font-size: 13px;
    color: #546e7a;
}
.msg-quote-sender { font-weight: 600; font-size: 12px; color: #78909c; margin-bottom: 4px; }
.msg-quote-text { font-size: 13px; color: #455a64; max-height: 48px; overflow: hidden; text-overflow: ellipsis; }

.reply-btn {
    background: transparent;
    border: none;
    color: #1976D2;
    font-size: 12px;
    padding: 4px 6px;
    border-radius: 6px;
    cursor: pointer;
}
.reply-btn:hover { background: rgba(25,118,210,0.06); }

/* 底部输入区的引用预览 */
.reply-preview {
    max-width: 800px;
    margin: 0 auto 8px;
    padding: 8px 12px;
    background: #fff8e1;
    border-left: 4px solid #ffb300;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #5d4037;
}
.reply-preview .rp-text { flex: 1; min-width: 0; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.reply-preview .rp-cancel { background: transparent; border: none; color: #5d4037; cursor: pointer; font-weight: 700; }

/* ===== 图片消息 ===== */
.msg-image-wrap {
    position: relative;
    cursor: pointer;
    border-radius: 12px;
    overflow: hidden;
    max-width: 260px;
    display: block;
}

.msg-image-wrap img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 280px;
    object-fit: cover;
    transition: transform 0.2s;
}

.msg-image-wrap:active img {
    transform: scale(1.03);
}

.msg-row.in .msg-image-wrap {
    border-bottom-left-radius: 4px;
}

.msg-row.out .msg-image-wrap {
    border-bottom-right-radius: 4px;
}

/* ===== 文件消息 ===== */
.msg-file-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px;
    min-width: 180px;
}

.msg-file-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.msg-row.in .msg-file-icon {
    background: #e3f2fd;
}

.msg-row.out .msg-file-icon {
    background: rgba(255,255,255,0.2);
}

.msg-file-info {
    flex: 1;
    min-width: 0;
}

.msg-file-name {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.msg-file-size {
    font-size: 12px;
    margin-top: 2px;
}

.msg-row.in .msg-file-size {
    color: #78909c;
}

.msg-row.out .msg-file-size {
    color: rgba(255,255,255,0.75);
}

.msg-file-download {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 18px;
    flex-shrink: 0;
}

.msg-row.in .msg-file-download {
    color: #1976D2;
    background: #e3f2fd;
}

.msg-row.out .msg-file-download {
    color: #fff;
    background: rgba(255,255,255,0.2);
}

.msg-file-download:active {
    transform: scale(0.92);
}

/* ===== 文本消息中的换行保留 ===== */
.msg-bubble.text {
    white-space: pre-wrap;
}

/* ===== 底部输入栏 ===== */
.input-bar {
    background: #fafafa;
    border-top: 1px solid #e0e0e0;
    padding: 8px 8px;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
    flex-shrink: 0;
    z-index: 10;
}

.input-bar-inner {
    display: flex;
    align-items: center;
    gap: 6px;
    max-width: 800px;
    margin: 0 auto;
}

.attach-btn {
    color: #607d8b !important;
    width: 42px;
    height: 42px;
    flex-shrink: 0;
}

.attach-btn:hover,
.attach-btn:active {
    color: #1976D2 !important;
}

.input-field {
    flex: 1;
    margin: 0;
    padding: 0;
}

.input-field .mdui-textfield-input {
    background: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 24px;
    padding: 8px 16px;
    font-size: 15px;
    height: 42px;
    margin: 0;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-field .mdui-textfield-input:focus {
    border-color: #1976D2;
    box-shadow: 0 0 0 2px rgba(25,118,210,0.15);
    outline: none;
}

/* 隐藏 MDUI 的 label 和底部线 */
.input-field .mdui-textfield-label,
.input-field .mdui-textfield-error {
    display: none;
}

.send-btn {
    width: 42px;
    height: 42px;
    border-radius: 50% !important;
    flex-shrink: 0;
    box-shadow: 0 2px 6px rgba(25,118,210,0.35);
    transition: transform 0.15s, box-shadow 0.15s;
}

.send-btn:active {
    transform: scale(0.9);
}

.send-btn i {
    font-size: 20px;
}

/* ===== 滚动到底部按钮 ===== */
.scroll-bottom-btn {
    position: fixed;
    bottom: 90px;
    right: 16px;
    width: 40px;
    height: 40px;
    background: #ffffff;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.18);
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 20;
    transition: transform 0.2s, opacity 0.2s;
}

.scroll-bottom-btn.show {
    display: flex;
}

.scroll-bottom-btn:active {
    transform: scale(0.9);
}

.scroll-bottom-btn i {
    font-size: 20px;
    color: #546e7a;
}

/* ===== 图片预览 Lightbox ===== */
.lightbox-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.92);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    animation: lightboxFadeIn 0.2s ease;
}

.lightbox-overlay.show {
    display: flex;
}

@keyframes lightboxFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.lightbox-close {
    position: absolute;
    top: 16px;
    right: 20px;
    color: #fff;
    font-size: 36px;
    font-weight: 300;
    cursor: pointer;
    z-index: 10001;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.lightbox-close:hover,
.lightbox-close:active {
    background: rgba(255,255,255,0.15);
}

.lightbox-img {
    max-width: 95vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 4px;
    cursor: default;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
    animation: lightboxImgIn 0.25s ease;
}

@keyframes lightboxImgIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* ===== 剪贴板图片预览弹窗 ===== */
.clipboard-preview-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.65);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    animation: lightboxFadeIn 0.2s ease;
}

.clipboard-preview-overlay.show {
    display: flex;
}

.clipboard-preview-card {
    background: #fff;
    border-radius: 16px;
    padding: 20px;
    max-width: 380px;
    width: 90%;
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    animation: lightboxImgIn 0.25s ease;
}

.clipboard-preview-title {
    font-size: 16px;
    font-weight: 600;
    color: #37474f;
    margin-bottom: 14px;
    text-align: center;
}

.clipboard-preview-card img {
    width: 100%;
    max-height: 280px;
    object-fit: contain;
    border-radius: 10px;
    background: #f5f5f5;
    display: block;
}

.clipboard-preview-actions {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    justify-content: flex-end;
}

.clipboard-cancel-btn {
    background: #eceff1 !important;
    color: #546e7a !important;
    border-radius: 8px;
    text-transform: none;
    font-size: 14px;
    padding: 8px 20px;
    min-width: auto;
}

.clipboard-send-btn {
    border-radius: 8px;
    text-transform: none;
    font-size: 14px;
    padding: 8px 20px;
    min-width: auto;
}

/* ===== 响应式 - 桌面端 ===== */
@media (min-width: 768px) {
    .message-container {
        padding: 16px 10%;
    }
    
    .msg-row {
        max-width: 60%;
    }
    
    .input-bar-inner {
        padding: 0 10%;
    }
    
    .msg-image-wrap {
        max-width: 320px;
    }
    
    .msg-image-wrap img {
        max-height: 360px;
    }
}

@media (min-width: 1200px) {
    .message-container {
        padding: 20px 20%;
    }
    
    .msg-row {
        max-width: 50%;
    }
    
    .input-bar-inner {
        padding: 0 20%;
    }
}

/* ===== 文件拖拽上传高亮 ===== */
body.drag-over .message-container::after {
    content: '释放以发送文件';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(25,118,210,0.9);
    color: #fff;
    font-size: 22px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    pointer-events: none;
}

/* ===== AI 私聊面板 ===== */
.ai-chat-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 9000;
    align-items: center;
    justify-content: center;
    animation: lightboxFadeIn 0.2s ease;
}

.ai-chat-overlay.show {
    display: flex;
}

.ai-chat-panel {
    width: 92%;
    max-width: 480px;
    height: 80vh;
    max-height: 700px;
    background: #fff;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 12px 48px rgba(0,0,0,0.25);
    animation: lightboxImgIn 0.25s ease;
}

.ai-chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: #1976D2;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    flex-shrink: 0;
}

.ai-chat-close {
    background: transparent;
    border: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.15s;
}

.ai-chat-close:hover {
    background: rgba(255,255,255,0.15);
}

.ai-chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    background: #f5f5f5;
    -webkit-overflow-scrolling: touch;
}

.ai-chat-container::-webkit-scrollbar {
    width: 4px;
}

.ai-chat-container::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.12);
    border-radius: 2px;
}

.ai-chat-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ai-chat-welcome {
    text-align: center;
    padding: 40px 20px;
    color: #90a4ae;
}

.ai-chat-welcome-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.ai-chat-welcome p {
    margin: 6px 0;
    font-size: 14px;
}

/* AI 消息气泡 */
.ai-msg-row {
    display: flex;
    flex-direction: column;
    max-width: 85%;
    animation: msgIn 0.25s ease-out;
}

.ai-msg-user {
    align-self: flex-end;
    align-items: flex-end;
}

.ai-msg-ai {
    align-self: flex-start;
    align-items: flex-start;
}

.ai-msg-bubble {
    padding: 10px 14px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.6;
    word-wrap: break-word;
    word-break: break-word;
    max-width: 100%;
}

.ai-msg-user .ai-msg-bubble {
    white-space: pre-wrap;
}

.ai-msg-user .ai-msg-bubble {
    background: #1976D2;
    color: #fff;
    border-bottom-right-radius: 4px;
}

.ai-msg-ai .ai-msg-bubble {
    background: #fff;
    color: #212121;
    border-bottom-left-radius: 4px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

/* AI 气泡内 Markdown 样式 */
.ai-msg-ai .ai-msg-bubble p {
    margin: 0 0 6px;
}
.ai-msg-ai .ai-msg-bubble p:last-child {
    margin-bottom: 0;
}
.ai-msg-ai .ai-msg-bubble h1,
.ai-msg-ai .ai-msg-bubble h2,
.ai-msg-ai .ai-msg-bubble h3 {
    margin: 8px 0 4px;
    font-weight: 600;
    line-height: 1.3;
}
.ai-msg-ai .ai-msg-bubble h1 { font-size: 17px; }
.ai-msg-ai .ai-msg-bubble h2 { font-size: 16px; }
.ai-msg-ai .ai-msg-bubble h3 { font-size: 15px; }
.ai-msg-ai .ai-msg-bubble strong { font-weight: 600; }
.ai-msg-ai .ai-msg-bubble em { font-style: italic; }
.ai-msg-ai .ai-msg-bubble code {
    background: #e8e8e8;
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 13px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    word-break: break-all;
}
.ai-msg-ai .ai-msg-bubble pre {
    background: #f0f0f0;
    border-radius: 8px;
    padding: 10px;
    margin: 8px 0;
    overflow-x: auto;
}
.ai-msg-ai .ai-msg-bubble pre code {
    background: none;
    padding: 0;
    font-size: 13px;
    line-height: 1.5;
    white-space: pre;
}
.ai-msg-ai .ai-msg-bubble ul,
.ai-msg-ai .ai-msg-bubble ol {
    margin: 4px 0;
    padding-left: 20px;
}
.ai-msg-ai .ai-msg-bubble li {
    margin: 2px 0;
}
.ai-msg-ai .ai-msg-bubble a {
    color: #1976D2;
    text-decoration: underline;
}
.ai-msg-ai .ai-msg-bubble a:hover {
    text-decoration: none;
}
.ai-msg-ai .ai-msg-bubble img.ai-md-img {
    max-width: 100%;
    border-radius: 8px;
    margin: 4px 0;
}
.ai-msg-ai .ai-msg-bubble del {
    color: #90a4ae;
    text-decoration: line-through;
}
.ai-msg-ai .ai-msg-bubble br {
    display: block;
    content: '';
    margin: 2px 0;
}

/* AI 气泡内 LaTeX 公式 */
.ai-msg-ai .ai-msg-bubble .ai-latex-block {
    text-align: center;
    padding: 8px 0;
    margin: 6px 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.ai-msg-ai .ai-msg-bubble .ai-latex-inline {
    display: inline;
    padding: 0 2px;
}
.ai-msg-ai .ai-msg-bubble .katex-display {
    margin: 0.5em 0;
}
.ai-msg-ai .ai-msg-bubble .katex {
    font-size: 1.05em;
    line-height: 1.4;
}

.ai-msg-meta {
    font-size: 11px;
    color: #90a4ae;
    margin-top: 2px;
    padding: 0 4px;
}

/* 输入栏 */
.ai-chat-input-bar {
    border-top: 1px solid #e0e0e0;
    padding: 8px 12px;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
    background: #fafafa;
    flex-shrink: 0;
}

.ai-chat-input-inner {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ai-chat-input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid #e0e0e0;
    border-radius: 24px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
    background: #fff;
}

.ai-chat-input:focus {
    border-color: #1976D2;
}

.ai-chat-send-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: #1976D2;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.15s;
}

.ai-chat-send-btn:active {
    transform: scale(0.9);
}

/* AI 打字动画 */
.ai-chat-loading {
    padding: 8px 12px;
    align-self: flex-start;
}

.ai-typing {
    display: flex;
    gap: 4px;
    padding: 10px 14px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

.ai-typing span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #90a4ae;
    animation: aiTyping 1.2s infinite ease-in-out;
}

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

@keyframes aiTyping {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* AI 面板响应式 */
@media (max-width: 600px) {
    .ai-chat-panel {
        width: 100%;
        height: 100%;
        max-width: 100%;
        max-height: 100%;
        border-radius: 0;
    }
}

/* ===== 侧边栏子列表（倒数日 & 待办预览） ===== */
.side-section-header {
    font-weight: 600 !important;
}
.side-section-header .side-arrow {
    font-size: 18px;
    color: #bdbdbd;
    margin-left: auto;
}

.side-sub-list {
    padding: 0 0 4px 0;
}

.side-sub-item {
    display: flex !important;
    align-items: center;
    gap: 8px;
    padding: 7px 16px 7px 52px !important;
    text-decoration: none !important;
    color: #37474f !important;
    font-size: 13px !important;
    transition: background 0.15s;
    cursor: pointer;
    min-height: auto !important;
}
.side-sub-item:hover {
    background: rgba(0,0,0,0.04);
}
.side-sub-item .side-sub-title {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #37474f;
}
.side-sub-item .side-sub-meta {
    font-size: 11px;
    color: #90a4ae;
    flex-shrink: 0;
}

/* 倒数日徽章 */
.side-sub-badge {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
    line-height: 1;
}
.side-sub-badge.cd-today {
    animation: sideBadgePulse 1.5s ease-in-out infinite;
}
@keyframes sideBadgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.12); }
}
.side-sub-badge.cd-past {
    opacity: 0.55;
}

/* 待办勾选标记 */
.side-sub-check {
    font-size: 14px;
    flex-shrink: 0;
    color: #bdbdbd;
}
.side-sub-check.todo-imp {
    font-size: 12px;
    color: #1976D2;
}

/* 空状态 */
.side-sub-empty {
    padding: 6px 16px 10px 52px;
    font-size: 12px;
    color: #b0bec5;
    font-style: italic;
}