/* CSS变量定义 - 亮色主题（默认） */
:root {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #fafafa;
    --bg-hover: #f5f5f5;
    --bg-active: #e8f5e8;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border-color: #e0e0e0;
    --border-light: #f0f0f0;
    --border-lighter: #eeeeee;
    --accent-color: #07c160;
    --accent-hover: #06ad56;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    --input-bg: #ffffff;
    --input-border: #dddddd;
    --input-focus: #07c160;
    --online-status: #07c160;
    --divider: #e0e0e0;
    --banner-bg: #fff3cd;
    --banner-text: #856404;
    --banner-btn: #ffc107;
    --banner-btn-hover: #e0a800;
    --group-announcement-bg: #f0f9ff;
    --group-announcement-border: #e0f2fe;
    --group-announcement-color: #1890ff;
    --error-bg: #ffebee;
    --error-text: #c62828;
    --success-bg: #e8f5e8;
    --success-text: #2e7d32;
    --warning-bg: #fff3cd;
    --warning-text: #856404;
    --modal-overlay: rgba(0, 0, 0, 0.5);
    --modal-bg: #ffffff;
    --scrollbar-track: #f1f1f1;
    --scrollbar-thumb: #c1c1c1;
    --scrollbar-thumb-hover: #a8a8a8;
}

/* 暗色主题变量 */
body.dark-mode {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2d2d2d;
    --bg-hover: #2a2a2a;
    --bg-active: #1b5e20;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-tertiary: #808080;
    --border-color: #3d3d3d;
    --border-light: #2a2a2a;
    --border-lighter: #333333;
    --accent-color: #4caf50;
    --accent-hover: #43a047;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.4);
    --input-bg: #2d2d2d;
    --input-border: #3d3d3d;
    --input-focus: #4caf50;
    --online-status: #4caf50;
    --divider: #3d3d3d;
    --banner-bg: #4a3f00;
    --banner-text: #ffd54f;
    --banner-btn: #ff9800;
    --banner-btn-hover: #f57c00;
    --group-announcement-bg: #0f172a;
    --group-announcement-border: #1e293b;
    --group-announcement-color: #3b82f6;
    --error-bg: #5c2b2b;
    --error-text: #ef9a9a;
    --success-bg: #1b5e20;
    --success-text: #a5d6a7;
    --warning-bg: #4a3f00;
    --warning-text: #ffd54f;
    --modal-overlay: rgba(0, 0, 0, 0.7);
    --modal-bg: #1e1e1e;
    --scrollbar-track: #2d2d2d;
    --scrollbar-thumb: #4d4d4d;
    --scrollbar-thumb-hover: #5d5d5d;
}

/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 登录/注册页面样式 */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #07c160 0%, #00a86b 100%);
}

.login-box {
    background: var(--bg-secondary);
    border-radius: 10px;
    box-shadow: 0 2px 10px var(--shadow-color);
    padding: 30px;
    width: 100%;
    max-width: 400px;
}

.app-title {
    text-align: center;
    color: var(--accent-color);
    font-size: 28px;
    margin-bottom: 20px;
    font-weight: bold;
}

.login-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-lighter);
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    padding: 10px;
    font-size: 16px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: var(--accent-color);
    border-bottom: 2px solid var(--accent-color);
    font-weight: bold;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
}

.input-group input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 1px solid var(--input-border);
    border-radius: 25px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: var(--input-bg);
    color: var(--text-primary);
}

.input-group input:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 2px rgba(7, 193, 96, 0.1);
}

.login-btn {
    width: 100%;
    padding: 12px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* 第三方登录样式 */
.third-party-login {
    margin-top: 30px;
}

.login-divider {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--border-color);
}

.login-divider span {
    padding: 0 15px;
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.third-party-btn {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 25px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 12px;
    background-color: #fff;
    color: var(--text-primary);
}

.third-party-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-hover);
}

.third-party-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px var(--shadow-color);
}

.third-party-btn i {
    font-size: 18px;
}

/* QQ登录按钮 */
.qq-login-btn {
    color: #12B7F5;
    border-color: #12B7F5;
    background-color: #fff;
}

.qq-login-btn:hover {
    background-color: #12B7F5;
    color: #fff;
    border-color: #12B7F5;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(18, 183, 245, 0.3);
}

/* GitHub登录按钮 */
.github-login-btn {
    color: #333;
    border-color: #333;
    background-color: #fff;
}

.github-login-btn:hover {
    background-color: #333;
    color: #fff;
    border-color: #333;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(51, 51, 51, 0.3);
}

/* 微软登录按钮 */
.microsoft-login-btn {
    color: #00A4EF;
    border: 2px solid #00A4EF;
    background-color: linear-gradient(135deg, #F25022 0%, #7FBA00 50%, #00A4EF 100%);
}

.microsoft-login-btn:hover {
    background: linear-gradient(135deg, #F25022 0%, #7FBA00 50%, #00A4EF 100%);
    color: #fff;
    border: 2px solid #00A4EF;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 164, 239, 0.3);
}

/* Steam登录按钮 */
.steam-login-btn {
    color: #1B2838;
    border-color: #1B2838;
    background-color: #fff;
}

.steam-login-btn:hover {
    background-color: #1B2838;
    color: #fff;
    border-color: #1B2838;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(27, 40, 56, 0.3);
}

/* Discord登录按钮 */
.discord-login-btn {
    color: #5865F2;
    border-color: #5865F2;
    background-color: #fff;
}

.discord-login-btn:hover {
    background-color: #5865F2;
    color: #fff;
    border-color: #5865F2;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(88, 101, 242, 0.3);
}

.terms-checkbox {
    margin: 15px 0;
    display: flex;
    align-items: center;
    font-size: 14px;
    color: var(--text-secondary);
}

.terms-checkbox input[type="checkbox"] {
    margin-right: 10px;
    transform: scale(1.2);
}

.terms-checkbox a {
    color: var(--accent-color);
    text-decoration: none;
}

.terms-checkbox a:hover {
    text-decoration: underline;
}

/* 设置项样式 */
.setting-item {
    margin-bottom: 20px;
}

.setting-label {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.setting-description {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: 10px;
}

/* 开关样式 */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.error {
    background: var(--error-bg);
    color: var(--error-text);
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 15px;
    font-size: 14px;
}

.notification.error {
    background: var(--error-bg);
    color: var(--error-text);
}

/* 邮箱绑定提醒横幅样式 */
.email-banner {
    background: var(--banner-bg);
    border-bottom: 1px solid var(--banner-btn);
    padding: 15px 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.banner-content {
    display: flex;
    align-items: center;
    max-width: 1200px;
    width: 100%;
}

.banner-content i {
    font-size: 24px;
    color: var(--banner-text);
    margin-right: 15px;
}

.banner-text {
    flex: 1;
}

.banner-text h4 {
    margin: 0 0 5px 0;
    color: var(--banner-text);
    font-size: 16px;
    font-weight: 600;
}

.banner-text p {
    margin: 0;
    color: var(--banner-text);
    font-size: 14px;
}

.banner-btn {
    background: var(--banner-btn);
    color: var(--banner-text);
    border: none;
    border-radius: 4px;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* 群公告样式 */
.group-announcement {
    padding: 10px;
    background: var(--group-announcement-bg);
    border-bottom: 1px solid var(--group-announcement-border);
    margin: 0 20px;
}

.group-announcement i {
    color: var(--group-announcement-color);
    margin-right: 10px;
    margin-top: 2px;
}

.group-announcement .announcement-title {
    font-weight: bold;
    margin-bottom: 5px;
    color: var(--group-announcement-color);
}

.group-announcement .announcement-time {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 5px;
}

.group-announcement .close-announcement-btn {
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 14px;
    margin-left: 10px;
}

.group-announcement .close-announcement-btn:hover {
    color: var(--text-primary);
}

/* 主聊天界面样式 */
.chat-app {
    display: flex;
    height: 100vh;
    background: var(--bg-secondary);
}

/* 当横幅存在时调整高度 */
.email-banner + .chat-app {
    height: calc(100vh - 70px);
}

/* 左侧边栏样式 */
.sidebar {
    width: 400px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
}

.avatar {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-right: 10px;
}

.username {
    font-weight: bold;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.header-actions, .chat-actions {
    display: flex;
    gap: 10px;
}

.action-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

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

/* 搜索框样式 */
.search-box {
    position: relative;
    padding: 10px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

/* 电脑版标签页样式 */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.tab-btn {
    flex: 1;
    padding: 15px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

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

/* 电脑版分开的聊天列表 */
.chat-lists {
    flex: 1;
    overflow: hidden;
}

.tab-content {
    display: none;
    height: 100%;
    overflow-y: auto;
}

.tab-content.active {
    display: block;
}

/* 手机版合并的聊天列表 */
.mobile-chat-list {
    display: none;
    flex: 1;
    overflow-y: auto;
}

/* 好友和群组列表样式 - 确保在不同设备上都能正确显示 */
.friends-list,
.groups-list,
.friends-list-mobile,
.groups-list-mobile {
    padding: 0;
    margin: 0;
    list-style: none;
}

.friend-item,
.group-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.friend-item:hover,
.group-item:hover {
    background-color: var(--bg-hover);
}

.friend-item.active,
.group-item.active {
    background-color: var(--bg-active);
}

/* 聊天区域 */
.chat-section {
    margin-bottom: 10px;
}

/* 区域标题 */
.section-header {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-lighter);
}

.section-header h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0;
}

/* 好友列表 */
.friends-list {
    padding: 0;
}

/* 群组列表 */
.groups-list {
    padding: 0;
}

.search-box i {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
}

.search-box input {
    width: 100%;
    padding: 10px 15px 10px 40px;
    border: 1px solid var(--input-border);
    border-radius: 20px;
    font-size: 14px;
    background: var(--input-bg);
    color: var(--text-primary);
}

.search-box input:focus {
    outline: none;
    border-color: var(--input-focus);
}

/* 好友列表样式 */
.friends-list {
    flex: 1;
    overflow-y: auto;
}

.friend-item {
    display: flex;
    align-items: center;
    padding: 15px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

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

.friend-item.active {
    background: var(--bg-active);
}

/* 群组列表样式 */
.groups-list {
    flex: 1;
    overflow-y: auto;
}

.group-item {
    display: flex;
    align-items: center;
    padding: 15px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

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

.group-item.active {
    background: var(--bg-active);
}

.group-info {
    flex: 1;
}

.group-name {
    font-weight: bold;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.group-last-message {
    font-size: 13px;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.group-time {
    font-size: 12px;
    color: var(--text-tertiary);
}

.friend-info {
    flex: 1;
}

.friend-name {
    font-weight: bold;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.friend-last-message {
    font-size: 13px;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.friend-time {
    font-size: 12px;
    color: var(--text-tertiary);
}

.online-status {
    width: 10px;
    height: 10px;
    background: var(--online-status);
    border-radius: 50%;
    margin-left: 10px;
    border: 2px solid white;
    box-shadow: 0 0 0 1px var(--border-color);
}

/* 右侧聊天区域样式 */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-tertiary);
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

/* 聊天搜索栏样式 */
.chat-search {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 15px;
}

.chat-search .search-box {
    position: relative;
    margin: 0;
    background: var(--bg-hover);
    border-radius: 20px;
    padding: 5px 15px;
    display: flex;
    align-items: center;
}

.chat-search .search-box i {
    position: static;
    margin-right: 10px;
    color: var(--text-tertiary);
}

.chat-search .search-box input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 8px 0;
    font-size: 14px;
    outline: none;
    color: var(--text-primary);
}

.chat-search .close-search-btn {
    width: 30px;
    height: 30px;
    border: none;
    background: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    transition: all 0.3s ease;
    margin-left: 5px;
}

.chat-search .close-search-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

/* 搜索结果样式 */
.search-results {
    margin-top: 10px;
    max-height: 300px;
    overflow-y: auto;
}

.search-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-light);
    font-size: 14px;
    color: var(--text-secondary);
}

.search-count {
    color: var(--accent-color);
    font-weight: bold;
}

.search-list {
    margin-top: 10px;
}

.search-item {
    padding: 12px;
    border-bottom: 1px solid var(--border-light);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.search-item-content {
    font-size: 14px;
    line-height: 1.4;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.search-item-time {
    font-size: 12px;
    color: var(--text-tertiary);
}

.search-highlight {
    background: #fff9c4;
    color: #ff6f00;
    padding: 0 2px;
    border-radius: 2px;
}

.chat-user-info {
    display: flex;
    align-items: center;
}

/* 聊天内容样式 */
.chat-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: var(--bg-primary);
}

.empty-chat {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-tertiary);
}

.empty-chat i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.message {
    display: flex;
    margin-bottom: 20px;
    align-items: flex-start;
}

.message.sent {
    flex-direction: row-reverse;
}

.message.received {
    flex-direction: row;
}

.message-avatar {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: var(--accent-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    margin: 0 10px;
}

.message-content {
    max-width: 60%;
}

.message-text {
    padding: 12px 16px;
    border-radius: 18px;
    font-size: 14px;
    line-height: 1.4;
    word-wrap: break-word;
    word-break: break-all;
}

.message.sent .message-text {
    background: var(--accent-color);
    color: white;
    border-top-right-radius: 4px;
}

.message.received .message-text {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-top-left-radius: 4px;
}

.message-sender {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    font-weight: 500;
}

.message-time {
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: 5px;
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
}

.message.received .message-time {
    text-align: left;
    justify-content: flex-start;
}

/* 消息状态指示器 */
.message-status {
    display: inline-flex;
    align-items: center;
    font-size: 11px;
}

.message-status i {
    margin-left: 2px;
}

/* 图片消息样式 */
.message-image {
    position: relative;
    max-width: 200px;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
}

.message-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.message-image img:hover {
    opacity: 0.9;
}

.message-image img.expanded {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 90%;
    max-height: 90vh;
    z-index: 9999;
    border-radius: 5px;
    box-shadow: 0 0 20px var(--modal-overlay);
}

/* 发送的图片消息样式 */
.message.sent .message-image {
    background: var(--accent-color);
    padding: 4px;
    border-bottom-right-radius: 4px;
}

/* 接收的图片消息样式 */
.message.received .message-image {
    background: var(--bg-secondary);
    padding: 4px;
    border-bottom-left-radius: 4px;
    box-shadow: 0 1px 2px var(--shadow-color);
}

/* 附件消息样式 */
.message-attachment {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-hover);
    border-radius: 8px;
    gap: 12px;
}

.attachment-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.attachment-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.attachment-name {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-all;
}

.attachment-download {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: var(--accent-color);
    color: white;
    border-radius: 4px;
    text-decoration: none;
    font-size: 13px;
    transition: all 0.3s ease;
}

.attachment-download:hover {
    background: var(--accent-hover);
}

/* 在线状态样式 */
.online-indicator {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 10px;
    height: 10px;
    background: var(--online-status);
    border-radius: 50%;
    border: 2px solid white;
    box-shadow: 0 0 0 1px var(--border-color);
}

.online-status-text {
    font-size: 12px;
    color: var(--online-status);
    margin-left: 8px;
    font-weight: normal;
}

/* 设置菜单样式 */
.settings-menu {
    position: fixed;
    background: var(--bg-secondary);
    border-radius: 5px;
    box-shadow: 0 2px 10px var(--shadow-hover);
    z-index: 9999;
    display: none;
    min-width: 150px;
}

.settings-menu.active {
    display: block;
}

.settings-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.settings-menu li {
    padding: 10px 15px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.settings-menu li:hover {
    background: var(--bg-hover);
}

/* 右键菜单样式 */
.context-menu {
    position: fixed;
    background: var(--bg-secondary);
    border-radius: 5px;
    box-shadow: 0 2px 10px var(--shadow-hover);
    z-index: 9999;
    display: none;
    min-width: 120px;
}

.context-menu.active {
    display: block;
}

.context-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.context-menu li {
    padding: 8px 12px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.context-menu li:hover {
    background: var(--bg-hover);
}

/* 头像上传样式 */
.avatar-upload-container {
    text-align: center;
    margin-bottom: 20px;
}

.avatar-preview {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--bg-hover);
    margin: 0 auto 20px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border-color);
}

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

#choose-avatar-btn {
    margin-top: 10px;
}

/* Emoji选择器样式 */
.emoji-selector {
    position: absolute;
    bottom: 100px;
    left: 20px;
    width: 300px;
    background: var(--bg-secondary);
    border-radius: 10px;
    box-shadow: 0 2px 15px var(--shadow-hover);
    z-index: 1000;
    display: none;
    animation: slideUp 0.3s ease;
}

.emoji-selector.active {
    display: block;
}

.emoji-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    border-bottom: 1px solid var(--border-light);
}

.emoji-header h4 {
    margin: 0;
    color: var(--text-primary);
    font-size: 14px;
}

.close-emoji {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-secondary);
    cursor: pointer;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.close-emoji:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.emoji-categories {
    display: flex;
    padding: 10px;
    border-bottom: 1px solid var(--border-light);
    gap: 5px;
}

.emoji-category {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-hover);
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.emoji-category:hover {
    background: var(--border-color);
}

.emoji-category.active {
    background: var(--accent-color);
    color: white;
}

.emoji-content {
    padding: 10px;
    max-height: 200px;
    overflow-y: auto;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 5px;
}

.emoji-item {
    width: 36px;
    height: 36px;
    border: none;
    background: none;
    border-radius: 6px;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.emoji-item:hover {
    background: var(--bg-hover);
    transform: scale(1.2);
}

/* 聊天输入框样式 */
.chat-input-container {
    background: var(--bg-secondary);
    padding: 15px;
    border-top: 1px solid var(--border-color);
}

.input-tools {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.tool-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.tool-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-hover);
    border-radius: 25px;
    padding: 5px 10px;
}

#message-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 10px;
    font-size: 14px;
    resize: none;
    outline: none;
    color: var(--text-primary);
    min-height: 20px;
    max-height: 120px;
    overflow-y: auto;
    line-height: 1.5;
    font-family: inherit;
}

.send-btn {
    width: 35px;
    height: 35px;
    border: none;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

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

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-overlay);
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--modal-bg);
    border-radius: 10px;
    box-shadow: 0 5px 25px var(--shadow-hover);
    width: 90%;
    max-width: 400px;
    animation: slideUp 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-lighter);
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-tertiary);
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 20px;
    border-top: 1px solid var(--border-lighter);
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-cancel {
    background: var(--bg-hover);
    color: var(--text-secondary);
}

.btn-cancel:hover {
    background: var(--border-color);
}

.btn-primary {
    background: var(--accent-color);
    color: white;
}

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

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

/* @mention功能样式 */
.mention-dropdown {
    position: absolute;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-shadow: 0 2px 8px var(--shadow-hover);
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
    min-width: 200px;
}

.mention-user-item {
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background-color 0.2s ease;
}

.mention-user-item:hover {
    background-color: var(--bg-hover);
}

.mention-user-item.selected {
    background-color: var(--bg-active);
}

.mention-user-item img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    margin-right: 8px;
    object-fit: cover;
}

/* 消息中的@提及样式 */
.mention {
    color: var(--accent-color);
    font-weight: 500;
    cursor: pointer;
}

.mention:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 容器布局 */
    .chat-app-container {
        display: flex;
        flex-direction: column;
        height: 100vh;
    }
    
    .chat-app-container .chat-app {
        flex: 1;
        height: calc(100vh - 48px);
        overflow: visible;
    }
    
    /* 侧边栏样式 - 主页显示所有好友/群聊 */
    .sidebar {
        width: 100%;
        position: absolute;
        z-index: 100;
        height: calc(100vh - 48px);
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 2px 0 10px var(--shadow-color);
        background: var(--bg-secondary);
        overflow: visible;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    /* 侧边栏背景遮罩 */
    .sidebar-backdrop {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--modal-overlay);
        z-index: 99;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .sidebar-backdrop.active {
        opacity: 1;
        visibility: visible;
    }
    
    /* 聊天主区域样式 - 单独的聊天界面 */
    .chat-main {
        width: 100%;
        display: flex;
        flex-direction: column;
        background: var(--bg-secondary);
    }
    
    /* 手机端侧边栏切换按钮 */
    .toggle-sidebar-btn {
        display: flex !important;
        margin-right: 10px;
    }
    
    /* 调整聊天头部布局 */
    .chat-header {
        padding: 10px 12px !important;
        background: var(--bg-tertiary) !important;
        border-bottom: 1px solid var(--border-color) !important;
    }
    
    .chat-user-info {
        flex: 1;
        overflow: hidden;
    }
    
    .chat-user-info .username {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .chat-actions {
        gap: 5px !important;
    }
    
    .chat-actions .action-btn {
        width: 32px !important;
        height: 32px !important;
    }
    
    /* 显示底部导航栏 */
    .bottom-nav {
        display: flex;
    }
    
    /* 当有邮箱横幅时调整高度 */
    .email-banner + .chat-app-container .chat-app {
        height: calc(100vh - 70px - 48px);
    }
    
    .email-banner + .chat-app-container .sidebar {
        height: calc(100vh - 70px - 48px);
    }
    
    /* 手机版显示合并的列表 */
    .mobile-chat-list {
        display: flex !important;
        flex-direction: column;
    }
    
    /* 手机版隐藏标签页和分开的列表 */
    .tabs {
        display: none !important;
    }
    
    .chat-lists {
        display: none !important;
    }
    
    /* 手机版聊天界面优化 - 更像微信 */
    .chat-content {
        flex: 1;
        overflow-y: auto;
        background: var(--bg-primary) !important;
        padding: 12px !important;
    }
    
    .message {
        margin-bottom: 12px !important;
    }
    
    .message-avatar {
        width: 32px !important;
        height: 32px !important;
        margin: 0 6px !important;
    }
    
    .message-content {
        max-width: 75% !important;
    }
    
    .message-text {
        padding: 9px 12px !important;
        font-size: 14px !important;
        border-radius: 18px !important;
    }
    
    .message.sent .message-text {
        background: var(--accent-color) !important;
        color: white !important;
        border-top-right-radius: 4px !important;
    }
    
    .message.received .message-text {
        background: var(--bg-secondary) !important;
        color: var(--text-primary) !important;
        border-top-left-radius: 4px !important;
    }
    
    .message-time {
        font-size: 10px !important;
        margin-top: 3px !important;
        padding: 0 6px !important;
    }
    
    /* 优化聊天输入框 */
    .chat-input-container {
        padding: 8px 10px !important;
        background: var(--bg-secondary) !important;
        border-top: 1px solid var(--border-color) !important;
    }
    
    .input-wrapper {
        background: var(--bg-hover) !important;
        border-radius: 20px !important;
        padding: 3px 6px !important;
    }
    
    #message-input {
        padding: 6px 10px !important;
        font-size: 14px !important;
    }
    
    .send-btn {
        width: 30px !important;
        height: 30px !important;
    }
    
    /* 优化空聊天状态 */
    .empty-chat {
        background: var(--bg-primary) !important;
    }
    
    .empty-chat i {
        font-size: 56px !important;
        margin-bottom: 16px !important;
    }
    
    .empty-chat p {
        font-size: 14px !important;
        color: var(--text-tertiary) !important;
    }
}

/* 桌面端布局优化 */
@media (min-width: 769px) {
    .chat-app {
        display: flex;
        height: 100vh;
    }
    
    .sidebar {
        width: 400px;
        border-right: 1px solid var(--border-color);
        background: var(--bg-secondary);
    }
    
    .chat-main {
        flex: 1;
        background: var(--bg-secondary);
    }
    
    .toggle-sidebar-btn {
        display: none !important;
    }
    
    .bottom-nav {
        display: none;
    }
    
    .chat-app-container {
        height: 100vh;
    }
    
    .chat-app-container .chat-app {
        height: 100vh;
    }
    
    .email-banner + .chat-app-container .chat-app {
        height: calc(100vh - 70px);
    }
    
    .email-banner + .chat-app-container .sidebar {
        height: calc(100vh - 70px);
    }
}

/* 引用消息样式 */
.message-quote {
    margin-bottom: 8px;
    padding: 8px 12px;
    border-left: 3px solid #d9d9d9;
    background: var(--bg-hover);
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.3;
    word-wrap: break-word;
}

.sent .message-quote {
    background: rgba(255, 255, 255, 0.9);
    border-left-color: var(--accent-color);
}

body.dark-mode .sent .message-quote {
    background: rgba(255, 255, 255, 0.1);
}

.quote-header {
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--text-tertiary);
    font-size: 12px;
}

.sent .quote-header {
    color: var(--text-secondary);
}

.quote-content {
    color: var(--text-secondary);
}

.sent .quote-content {
    color: var(--text-primary);
}

/* 触摸反馈效果 - 全局样式 */
button {
    -webkit-tap-highlight-color: transparent;
    transition: transform 0.1s;
}

/* 触摸反馈效果 - 仅在移动设备上生效 */
@media (max-width: 768px) {
    /* 禁用高亮效果 */
    * {
        -webkit-tap-highlight-color: transparent;
    }
    
    /* 手机版显示删除按钮 */
    .friends-list-mobile .friend-actions {
        opacity: 1 !important;
    }
    
    /* 手机版分享窗口优化 */
    .share-link-container {
        flex-direction: column;
        gap: 10px;
    }
    
    .share-link-input {
        border-radius: 4px;
    }
    
    .share-link-container .btn {
        width: 100%;
        padding: 12px;
        border-radius: 4px;
    }
    
    .qrcode-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .qrcode-actions .btn {
        width: 100%;
        padding: 12px;
    }
    
    #qrcode {
        padding: 15px;
    }
    
    #qrcode canvas {
        max-width: 150px;
        max-height: 150px;
    }
    
    .share-tip {
        font-size: 13px;
        line-height: 1.4;
    }
    
    .modal-content {
        max-width: 95% !important;
    }
    
    /* 手机版隐藏二维码操作按钮 */
    #download-qrcode,
    #refresh-qrcode {
        display: none !important;
    }
    
    /* 可交互元素的触摸反馈 */
    button:active,
    .btn:active,
    .nav-item:active,
    .friend-item:active,
    .group-item:active,
    .chat-item:active,
    .message-item:active,
    .message-avatar:active,
    .sidebar-header:active,
    .mobile-menu-btn:active,
    .add-friend-btn:active,
    .send-btn:active,
    .tab-btn:active,
    .login-btn:active,
    .register-btn:active,
    .confirm-add-friend-btn:active,
    .cancel-add-friend-btn:active,
    .close-modal:active,
    .share-link-container .btn:active,
    .qrcode-actions .btn:active {
        transform: scale(0.97);
        opacity: 0.7;
        transition: transform 0.1s, opacity 0.1s;
    }
    
    /* 导航栏按钮的触摸反馈 */
    .nav-item:active {
        transform: scale(0.95);
    }
    
    /* 消息头像的触摸反馈 */
    .message-avatar:active {
        transform: scale(0.95);
    }
}

/* 输入框中的引用样式 */
.quote-input-container {
    margin: 10px 15px;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-tertiary);
    font-size: 14px;
}

.quote-input-container .quote-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.quote-input-container .quote-header span {
    font-weight: 500;
    color: var(--text-secondary);
}

.quote-input-container .close-quote {
    background: none;
    border: none;
    font-size: 16px;
    color: #999;
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.quote-input-container .close-quote:hover {
    color: var(--text-primary);
}

.quote-input-container .quote-content {
    color: var(--text-primary);
    word-wrap: break-word;
    line-height: 1.3;
}

/* 群组成员列表样式 */
.group-member-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    border-bottom: 1px solid #f0f0f0;
}

.group-member-item:hover {
    background: var(--bg-hover);
}

.member-info {
    display: flex;
    align-items: center;
}

.member-info .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    font-size: 16px;
}

.member-info .avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.member-info div {
    display: flex;
    flex-direction: column;
}

.member-info div div:first-child {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.member-info div div:last-child {
    font-size: 12px;
    color: #999;
}

/* 成员操作按钮容器 */
.member-actions {
    display: flex;
    gap: 8px;
}

/* 禁言按钮样式 */
.btn-warning {
    background-color: #faad14;
    color: white;
}

.btn-warning:hover {
    background-color: #d48806;
}

/* 解禁按钮样式 */
.btn-success {
    background-color: var(--accent-color);
    color: white;
}

.btn-success:hover {
    background-color: var(--accent-hover);
}

/* 邀请好友复选框样式 */
.friend-checkbox-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid #f0f0f0;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.friend-checkbox-item:hover {
    background-color: var(--bg-hover);
}

/* 邀请好友复选框 */
.invite-friend-checkbox {
    margin-left: 10px;
    cursor: pointer;
}

/* 邀请好友复选框标签 */
.invite-friend-checkbox + label {
    margin-left: 5px;
    cursor: pointer;
}

/* 好友请求列表样式 */
.friend-request-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    border-bottom: 1px solid #f0f0f0;
}

.friend-request-item:hover {
    background: var(--bg-hover);
}

.request-info {
    display: flex;
    align-items: center;
    flex: 1;
}

.request-info .avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    font-size: 18px;
}

.request-info .avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.request-info div {
    flex: 1;
}

.request-actions {
    display: flex;
    gap: 8px;
}

/* 好友列表项样式 */
.friend-item {
    position: relative;
}

.friend-actions {
    display: flex;
    gap: 5px;
    margin-right: 10px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.friend-item:hover .friend-actions {
    opacity: 1;
}

.delete-friend-btn {
    width: 30px;
    height: 30px;
    border: none;
    background: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    transition: all 0.3s ease;
}

.delete-friend-btn:hover {
    background: var(--error-bg);
    color: var(--error-text);
}

/* 按钮样式 */
.btn-danger {
    background-color: #ff4d4f;
    color: white;
}

.btn-danger:hover {
    background-color: var(--error-text);
    opacity: 0.8;
}

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

/* 好友请求徽章样式 */
#request-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--error-text);
    color: white;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.action-btn {
    position: relative;
}

/* 手机端侧边栏切换按钮 */
.toggle-sidebar-btn {
    display: none;
}

/* 底部导航栏容器 */
.chat-app-container {
    height: 100vh;
}

.chat-app-container .chat-app {
    height: 100vh;
    overflow: hidden;
}

/* 底部导航栏样式 */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    height: 48px;
    justify-content: space-around;
    align-items: center;
    z-index: 999;
    box-shadow: 0 -2px 10px var(--shadow-color);
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    padding: 4px 0;
    color: var(--text-secondary);
    font-size: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-item i {
    font-size: 18px;
    margin-bottom: 2px;
}

.nav-item.active {
    color: var(--accent-color);
}

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

/* 下拉菜单容器 */
.dropdown-menu-container {
    position: relative;
}

/* 下拉菜单 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-secondary);
    border-radius: 8px;
    box-shadow: 0 2px 10px var(--shadow-color);
    min-width: 160px;
    margin-top: 5px;
    z-index: 1000;
    display: none;
    animation: slideDown 0.3s ease;
}

.dropdown-menu.active {
    display: block;
}

/* 下拉菜单列表 */
.dropdown-menu ul {
    list-style: none;
    padding: 8px 0;
    margin: 0;
}

/* 下拉菜单项 */
.dropdown-menu li {
    padding: 10px 16px;
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.dropdown-menu li:hover {
    background-color: var(--bg-hover);
}

/* 下拉菜单项图标 */
.dropdown-menu li i {
    margin-right: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* 下拉菜单项文本 */
.dropdown-menu li span {
    font-size: 14px;
    color: var(--text-primary);
}

/* 分隔线 */
.dropdown-menu li.divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 0;
    padding: 0;
    cursor: default;
}

.dropdown-menu li.divider:hover {
    background: #e8e8e8;
}

/* 动画 */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 分享群组样式 */
.share-group-info {
    padding: 20px 0;
}

.share-group-info h4 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 18px;
}

.share-link-container {
    display: flex;
    margin: 15px 0;
}

.share-link-input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--input-border);
    border-radius: 4px 0 0 4px;
    font-size: 14px;
    color: var(--text-primary);
}

.share-link-input:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 2px rgba(7, 193, 96, 0.1);
}

.share-tip {
    margin-top: 15px;
    font-size: 14px;
    color: #999;
    line-height: 1.5;
}

/* 二维码相关样式 */
.qrcode-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
}

.qrcode-container {
    position: relative;
    margin: 20px 0;
}

#qrcode {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow-color);
}

#qrcode canvas {
    max-width: 200px;
    max-height: 200px;
}

.qrcode-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

body.dark-mode .qrcode-loading {
    background: rgba(0, 0, 0, 0.7);
}

.qrcode-actions {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    justify-content: center;
}

.qrcode-actions .btn {
    flex: 1;
    max-width: 150px;
}

/* 辅助类 */
.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

/* 暗色系切换按钮样式 */
.theme-toggle-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    position: relative;
}

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

.theme-toggle-btn i {
    font-size: 18px;
    transition: all 0.3s ease;
}

/* 暗色系切换按钮 - 太阳图标 */
.theme-toggle-btn .sun-icon {
    display: block;
}

.theme-toggle-btn .moon-icon {
    display: none;
}

/* 暗色系模式下的图标切换 */
body.dark-mode .theme-toggle-btn .sun-icon {
    display: none;
}

body.dark-mode .theme-toggle-btn .moon-icon {
    display: block;
}

/* 暗色系切换按钮动画 */
.theme-toggle-btn:active {
    transform: scale(0.95);
}

/* 主题切换提示 */
.theme-toggle-tooltip {
    position: absolute;
    top: -35px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
}

.theme-toggle-btn:hover .theme-toggle-tooltip {
    opacity: 1;
    visibility: visible;
    top: -40px;
}

/* 暗色系切换按钮在侧边栏中的位置 */
.sidebar-header .theme-toggle-btn {
    margin-left: 5px;
}

/* 暗色系切换按钮在底部导航栏中的位置 */
.bottom-nav .theme-toggle-btn {
    width: 100%;
    height: 100%;
    border-radius: 0;
    flex-direction: column;
    gap: 5px;
}

.bottom-nav .theme-toggle-btn i {
    font-size: 20px;
}

.bottom-nav .theme-toggle-btn .theme-toggle-tooltip {
    display: none;
}