/**
 * 文件级注释：H5 游客页面样式
 * 说明：包含资料页面和聊天页面的所有样式
 * 设计风格：暗色主题，现代简约
 */

/* ========== 基础变量 ========== */
:root {
    /* 主色调 */
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.3);
    
    /* 背景色 */
    --bg-primary: #0c0c1d;
    --bg-secondary: #13132b;
    --bg-tertiary: #1e1e3f;
    --bg-card: #181835;
    --bg-hover: #232350;
    
    /* 文字色 */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* 状态色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* 消息气泡 */
    --bubble-self: linear-gradient(135deg, #6366f1, #8b5cf6);
    --bubble-other: #1e1e3f;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 50%;
    
    /* 安全区域 */
    --safe-area-top: env(safe-area-inset-top);
    --safe-area-bottom: env(safe-area-inset-bottom);
    
    /* 动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
}

/* ========== 基础样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* 添加背景渐变效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50vh;
    background: radial-gradient(ellipse at top, var(--primary-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-color);
}

img {
    max-width: 100%;
    height: auto;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
    transition: all var(--transition-normal);
}

button:active {
    transform: scale(0.96);
}

/* ========== 加载状态 ========== */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    gap: var(--spacing-lg);
}

.loading-spinner {
    width: 56px;
    height: 56px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--primary-color);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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

.loading-container p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* ========== 错误页面 ========== */
.error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    padding: var(--spacing-xl);
    text-align: center;
}

.error-icon {
    font-size: 72px;
    margin-bottom: var(--spacing-lg);
    animation: bounce 1s ease infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.error-container h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.error-container p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.btn-back {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: var(--radius-lg);
    font-weight: 500;
    transition: all var(--transition-normal);
}

.btn-back:hover {
    background: var(--primary-color);
    text-decoration: none;
    box-shadow: 0 8px 24px var(--primary-glow);
}

/* ========== 资料页面 ========== */
.profile-container {
    min-height: 100vh;
    padding-bottom: 100px;
    animation: fadeIn 0.5s ease;
}

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

.profile-header {
    position: relative;
    height: 220px;
    overflow: visible;
}

.header-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark), #7c3aed);
    opacity: 0.9;
    overflow: hidden;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.header-bg::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to top, var(--bg-primary), transparent);
}

.avatar-container {
    position: absolute;
    bottom: -55px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.avatar {
    width: 110px;
    height: 110px;
    border-radius: var(--radius-full);
    border: 4px solid var(--bg-primary);
    object-fit: cover;
    background: var(--bg-tertiary);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.online-indicator {
    position: absolute;
    bottom: 8px;
    right: 8px;
    width: 22px;
    height: 22px;
    border-radius: var(--radius-full);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.online-indicator.online {
    background: var(--success-color);
    box-shadow: 0 0 12px var(--success-color);
}

.online-indicator.offline {
    background: var(--text-muted);
}

.profile-info {
    padding: 70px var(--spacing-lg) var(--spacing-lg);
    text-align: center;
}

.display-name {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.username {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: var(--spacing-md);
}

.bio {
    color: var(--text-secondary);
    font-size: 15px;
    max-width: 320px;
    margin: 0 auto var(--spacing-lg);
    word-break: break-word;
    line-height: 1.6;
}

/* 简介中的链接 */
.bio-link {
    color: var(--primary-light);
    text-decoration: none;
    border-bottom: 1px dashed var(--primary-light);
    transition: all var(--transition-fast);
}

.bio-link:hover {
    color: var(--primary-color);
    border-bottom-style: solid;
}

.status-text {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    font-size: 13px;
    color: var(--text-secondary);
}

.status-text.online {
    color: var(--success-color);
    background: rgba(16, 185, 129, 0.1);
}

.group-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 14px;
}

.stat-value {
    font-weight: 700;
    font-size: 18px;
    color: var(--text-primary);
}

/* ========== 按钮样式 ========== */
.profile-actions {
    padding: 0 var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.btn-primary, .btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 16px;
    font-weight: 600;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-primary);
    box-shadow: 0 8px 24px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px var(--primary-glow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--bg-hover);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--primary-color);
}

.btn-icon {
    font-size: 20px;
}

/* ========== 游客提示 ========== */
.guest-tip {
    margin: var(--spacing-xl) var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--bg-tertiary);
}

.guest-tip p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: var(--spacing-xs) 0;
}

.guest-tip p:first-child {
    color: var(--primary-light);
    font-weight: 500;
}

/* ========== 下载横幅 ========== */
.download-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + var(--safe-area-bottom));
    background: var(--bg-secondary);
    border-top: 1px solid var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.banner-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.banner-logo {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.banner-title {
    font-weight: 700;
    font-size: 16px;
}

.banner-desc {
    font-size: 13px;
    color: var(--text-secondary);
}

.btn-download {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--primary-color);
    color: var(--text-primary);
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 600;
}

.btn-download:hover {
    text-decoration: none;
    background: var(--primary-dark);
}

/* ========== 聊天页面 ========== */
.chat-body {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.chat-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: calc(60px + var(--safe-area-top));
    padding: var(--safe-area-top) var(--spacing-md) 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--bg-tertiary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.chat-header .btn-back {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--text-primary);
    border-radius: var(--radius-full);
    padding: 0;
}

.chat-header .btn-back:hover {
    background: var(--bg-tertiary);
}

.header-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-avatar {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-full);
    object-fit: cover;
    background: var(--bg-tertiary);
    border: 2px solid var(--bg-hover);
}

.header-name {
    font-size: 17px;
    font-weight: 600;
}

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

/* ========== 消息列表 ========== */
.message-list {
    flex: 1;
    overflow-y: auto;
    padding: calc(70px + var(--safe-area-top)) var(--spacing-md) var(--spacing-md);
    padding-bottom: 160px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.load-more {
    text-align: center;
    padding: var(--spacing-md);
}

.load-more button {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    font-size: 14px;
}

.load-more button:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 56px;
    margin-bottom: var(--spacing-md);
    opacity: 0.6;
}

/* ========== 消息气泡 ========== */
.message-item {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 80%;
    animation: slideIn 0.3s ease;
}

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

.message-item.self {
    flex-direction: row-reverse;
    align-self: flex-end;
    padding-right: var(--spacing-sm);
}

.message-item.other {
    align-self: flex-start;
}

.message-avatar {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-full);
    object-fit: cover;
    background: var(--bg-tertiary);
    flex-shrink: 0;
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.message-item.self .message-content {
    align-items: flex-end;
}

.message-sender {
    font-size: 12px;
    color: var(--text-secondary);
    padding: 0 var(--spacing-sm);
}

.message-bubble {
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    word-break: break-word;
    position: relative;
}

.message-item.self .message-bubble {
    background: var(--bubble-self);
    border-bottom-right-radius: var(--spacing-xs);
    box-shadow: 0 4px 16px var(--primary-glow);
}

.message-item.other .message-bubble {
    background: var(--bubble-other);
    border-bottom-left-radius: var(--spacing-xs);
}

.message-text {
    font-size: 15px;
    line-height: 1.5;
    white-space: pre-wrap;
}

/* 消息中的链接 */
.message-link {
    color: inherit;
    text-decoration: underline;
    text-decoration-style: dashed;
    text-underline-offset: 2px;
    transition: all var(--transition-fast);
    word-break: break-all;
}

.message-link:hover {
    text-decoration-style: solid;
    opacity: 0.85;
}

/* 自己发送的消息链接 - 白色调 */
.message-item.self .message-link {
    color: rgba(255, 255, 255, 0.95);
}

/* 对方消息链接 - 主题色 */
.message-item.other .message-link {
    color: var(--primary-light);
}

.message-time {
    font-size: 11px;
    color: var(--text-muted);
    padding: 0 var(--spacing-sm);
}

/* 图片消息 */
.message-image {
    max-width: 260px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.message-image:hover {
    transform: scale(1.02);
}

/* 视频消息 */
.message-video {
    position: relative;
    max-width: 260px;
    cursor: pointer;
}

.message-video img {
    width: 100%;
    border-radius: var(--radius-md);
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 52px;
    height: 52px;
    background: rgba(0, 0, 0, 0.6);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
    backdrop-filter: blur(8px);
    transition: all var(--transition-fast);
}

.message-video:hover .video-play-btn {
    background: var(--primary-color);
    transform: translate(-50%, -50%) scale(1.1);
}

/* 语音消息 */
.message-audio {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 140px;
    padding: var(--spacing-sm);
    cursor: pointer;
}

.audio-icon {
    font-size: 22px;
}

.audio-waveform {
    flex: 1;
    height: 28px;
    display: flex;
    align-items: center;
    gap: 3px;
}

.audio-bar {
    width: 3px;
    background: currentColor;
    border-radius: 2px;
    opacity: 0.6;
    transition: height var(--transition-fast);
}

.message-audio.playing .audio-bar {
    animation: waveform 0.5s ease-in-out infinite alternate;
}

@keyframes waveform {
    from { height: 8px; }
    to { height: 24px; }
}

.audio-duration {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 文件消息 */
.message-file {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    cursor: pointer;
    min-width: 220px;
    transition: background var(--transition-fast);
}

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

.file-icon {
    font-size: 36px;
}

.file-info {
    flex: 1;
    overflow: hidden;
}

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

.file-size {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 位置消息 */
.message-location {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.location-map {
    width: 220px;
    height: 130px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
}

.location-name {
    font-size: 14px;
    font-weight: 500;
}

.location-address {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 联系人消息 */
.message-contact {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    cursor: pointer;
}

.contact-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
}

.contact-name {
    font-size: 15px;
    font-weight: 500;
}

/* 系统消息 */
.message-system {
    text-align: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--text-muted);
    font-size: 13px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    margin: var(--spacing-sm) auto;
}

/* ========== 输入区域 ========== */
.chat-input-area {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, var(--bg-secondary), rgba(19, 19, 43, 0.95));
    border-top: 1px solid var(--bg-tertiary);
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + var(--safe-area-bottom));
    z-index: 100;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

.guest-limit-tip {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(245, 158, 11, 0.05));
    border: 1px solid rgba(245, 158, 11, 0.25);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    font-size: 13px;
}

.guest-limit-tip .tip-icon {
    font-size: 14px;
}

.guest-limit-tip span {
    color: var(--warning-color);
    flex: 1;
}

.guest-limit-tip .download-link {
    color: var(--primary-light);
    font-weight: 600;
    padding: 4px 12px;
    background: rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-md);
    font-size: 12px;
}

.input-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border-radius: 24px;
    padding: 0 16px;
    min-height: 48px;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
}

.input-wrapper:focus-within {
    border-color: var(--primary-color);
    background: var(--bg-card);
    box-shadow: 0 0 0 4px var(--primary-glow);
}

.message-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 16px;
    resize: none;
    max-height: 100px;
    min-height: 24px;
    line-height: 24px;
    padding: 12px 0;
    margin: 0;
}

.message-input::placeholder {
    color: var(--text-muted);
    line-height: 24px;
}

.char-count {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    color: var(--text-muted);
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
}

.input-wrapper:focus-within .char-count {
    opacity: 1;
}

/* 多行时字符计数移到底部 */
.input-wrapper.multiline .char-count {
    top: auto;
    bottom: 8px;
    transform: none;
}

.char-count.warning {
    color: var(--warning-color);
}

.char-count.danger {
    color: var(--danger-color);
}

.btn-send {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 20px var(--primary-glow);
    transition: all var(--transition-normal);
}

.btn-send .send-icon {
    transition: transform var(--transition-fast);
}

.btn-send:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    box-shadow: none;
}

.btn-send:not(:disabled):hover {
    transform: scale(1.08);
    box-shadow: 0 6px 28px var(--primary-glow);
}

.btn-send:not(:disabled):hover .send-icon {
    transform: translateX(2px);
}

.btn-send:not(:disabled):active {
    transform: scale(0.95);
}

/* 功能按钮区 */
.input-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--bg-tertiary);
    margin-top: var(--spacing-md);
}

.action-btns {
    display: flex;
    gap: var(--spacing-xs);
}

.action-btn {
    width: 36px;
    height: 36px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.action-btn:hover {
    background: var(--bg-hover);
    border-color: var(--bg-hover);
    transform: scale(1.1);
}

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

.download-tip {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 6px 12px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: var(--radius-lg);
    font-size: 12px;
    color: var(--primary-light);
    transition: all var(--transition-fast);
}

.download-tip:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.25), rgba(139, 92, 246, 0.2));
    text-decoration: none;
    transform: translateY(-1px);
}

.download-icon {
    font-size: 14px;
}

/* ========== WebSocket 状态 ========== */
.ws-status {
    position: fixed;
    top: calc(70px + var(--safe-area-top));
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    font-size: 13px;
    color: var(--text-secondary);
    z-index: 99;
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.ws-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--warning-color);
    animation: pulse 1.5s infinite;
}

.ws-status.connected .ws-dot {
    background: var(--success-color);
    animation: none;
}

.ws-status.error .ws-dot {
    background: var(--danger-color);
    animation: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

/* ========== Toast 提示 ========== */
.toast {
    position: fixed;
    bottom: 180px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-card);
    color: var(--text-primary);
    border-radius: var(--radius-xl);
    font-size: 14px;
    font-weight: 500;
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 200;
    pointer-events: none;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.error {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
}

.toast.success {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

/* ========== 图片/视频预览 ========== */
.image-viewer, .video-player {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
}

.viewer-overlay, .player-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
}

.viewer-image, .player-video {
    position: relative;
    max-width: 92%;
    max-height: 92%;
    z-index: 1;
    border-radius: var(--radius-md);
}

.viewer-close, .player-close {
    position: absolute;
    top: calc(var(--spacing-lg) + var(--safe-area-top));
    right: var(--spacing-lg);
    width: 44px;
    height: 44px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: var(--radius-full);
    font-size: 24px;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
}

.viewer-close:hover, .player-close:hover {
    background: var(--danger-color);
}

/* ========== 应用介绍页面 ========== */
.app-intro-container {
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: calc(var(--spacing-xl) * 1.25) var(--spacing-xl) calc(var(--spacing-xl) * 1.5);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.app-intro-content {
    width: 100%;
    max-width: 1200px;
    text-align: center;
    animation: slideUp 0.5s ease;
    margin-left: auto;
    margin-right: auto;
}

.app-intro-grid {
    display: grid;
    gap: var(--spacing-xl);
    grid-template-columns: 1fr;
    align-items: stretch;
}

.app-intro-main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.app-intro-header {
    margin-bottom: var(--spacing-xl);
}

.mobile-only {
    display: block;
}

.desktop-only {
    display: none;
}

.app-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-lg);
    /*background: linear-gradient(135deg, var(--primary-color), var(--primary-light));*/
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    /*box-shadow: 0 20px 60px rgba(99, 102, 241, 0.4);*/
    position: relative;
    overflow: hidden;
}

.app-logo::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.app-logo img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    position: relative;
    z-index: 1;
}

.app-logo-placeholder {
    font-size: 64px;
    position: relative;
    z-index: 1;
}

.app-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.app-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.app-features {
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-fast);
}

.feature-item:hover {
    background: var(--bg-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    font-size: 32px;
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
}

.feature-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.feature-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.app-download-section {
    margin-top: var(--spacing-xl);
}

.desktop-download-panel {
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--bg-tertiary);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    align-self: stretch;
}

.desktop-panel-header {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.desktop-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.desktop-title {
    font-size: 24px;
    font-weight: 700;
}

.desktop-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.desktop-download-grid {
    display: grid;
    gap: var(--spacing-md);
}

.desktop-download-card {
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--bg-tertiary);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.desktop-download-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
}

.desktop-download-card.is-recommend {
    border-color: var(--primary-color);
    box-shadow: 0 12px 32px var(--primary-glow);
}

.download-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.download-card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.download-card-header h3 {
    font-size: 18px;
    margin-bottom: 2px;
}

.download-card-header p {
    color: var(--text-secondary);
    font-size: 13px;
}

.download-card-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.btn-download-card {
    width: 100%;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--bg-hover);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.btn-download-card:hover {
    background: var(--bg-hover);
    border-color: var(--primary-color);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.download-recommend {
    margin-left: auto;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
    font-size: 12px;
    font-weight: 600;
    display: none;
}

.desktop-download-card.is-recommend .download-recommend {
    display: inline-flex;
}

.desktop-hint {
    margin-top: var(--spacing-md);
    color: var(--text-muted);
    font-size: 12px;
}

.btn-download-primary {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.btn-download-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(99, 102, 241, 0.5);
}

.btn-download-primary:active {
    transform: translateY(0);
}

.btn-download-primary .btn-icon {
    font-size: 24px;
}

.download-hint {
    margin-top: var(--spacing-lg);
    font-size: 13px;
    color: var(--text-muted);
}

.download-hint code {
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
    color: var(--primary-light);
}

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

/* ========== 响应式适配 ========== */
@media (min-width: 768px) {
    .profile-container {
        max-width: 500px;
        margin: 0 auto;
    }

    .chat-header, .chat-input-area {
        max-width: 800px;
        left: 50%;
        transform: translateX(-50%);
        border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    }
    
    .chat-input-area {
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    .message-list {
        max-width: 800px;
        margin: 0 auto;
    }
    
    .ws-status {
        left: 50%;
        transform: translateX(-50%);
    }
}

@media (min-width: 992px) {
    .app-intro-container {
        padding: var(--spacing-xl) var(--spacing-xl) calc(var(--spacing-xl) * 1.5);
    }

    .app-intro-content {
        text-align: center;
    }

    .app-intro-grid {
        grid-template-columns: 1fr;
        align-items: center;
        column-gap: var(--spacing-xl);
    }

    .app-intro-header {
        text-align: center;
    }

    .app-features {
        display: block;
    }

    .app-download-section {
        max-width: 420px;
        margin-left: auto;
        margin-right: auto;
    }

    .mobile-only {
        display: none;
    }

    .desktop-only {
        display: block;
    }
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

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

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

/* ========== App 唤起提示 ========== */
.app-open-tip {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: fadeIn 0.2s ease;
}

.app-tip-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.app-tip-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--primary-color);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

.app-tip-content span {
    color: var(--text-secondary);
    font-size: 15px;
}