.chat-page-v2 {
    display: flex;
    height: 100%;
}

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    border-right: 1px solid var(--border-light);
}

.chat-header {
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card);
}

.chat-title h2 {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

.chat-title p {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    margin-top: 2px;
}

.chat-header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.stat-label {
    font-size: 11px;
    color: var(--text-tertiary);
}

.stat-value {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--color-primary);
}

.chat-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-4);
    position: relative;
}

.chat-messages {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

/* 滚动到底部按钮 - 用户上滑阅读历史时显示 */
.scroll-to-bottom-btn {
    position: absolute;
    bottom: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary, #6366f1);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    z-index: 50;
}

.scroll-to-bottom-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-bottom-btn:hover {
    background: var(--color-primary-dark, #4f46e5);
    transform: translateY(-2px);
}

.scroll-to-bottom-btn .new-msg-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    border-radius: 9px;
    background: #ef4444;
    color: white;
    font-size: 11px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 5px;
}

.chat-empty-guide {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-12) var(--spacing-6);
    text-align: center;
}

.guide-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-xl);
    background: var(--gradient-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-4);
}

.guide-icon i {
    font-size: 24px;
    color: var(--color-primary);
}

.chat-empty-guide h3 {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.chat-empty-guide > p {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-6);
}

.guide-actions {
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
    justify-content: center;
}

.guide-action {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-full);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: var(--text-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.guide-action:hover {
    border-color: var(--color-primary-200);
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.guide-action i {
    color: var(--color-primary);
}

.guide-quick-ops {
    display: flex;
    gap: var(--spacing-3);
    justify-content: center;
    margin-top: var(--spacing-4);
    flex-wrap: wrap;
}

.guide-quick-op {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    border: 1px dashed var(--color-primary-300);
    border-radius: var(--radius-md);
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex: 1;
    justify-content: center;
    min-width: 140px;
}

.guide-quick-op:hover {
    border-style: solid;
    background: var(--color-primary-100);
    transform: translateY(-1px);
}

.guide-quick-op i {
    font-size: var(--text-base);
}

.message {
    display: flex;
    gap: var(--spacing-3);
    max-width: 85%;
}

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

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.message.assistant .message-avatar {
    background: var(--gradient-subtle);
}

.message.assistant .message-avatar i {
    color: var(--color-primary);
    font-size: 14px;
}

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

.message.user .message-avatar i {
    color: #fff;
    font-size: 14px;
}

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

.message-text {
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    word-break: break-word;
}

.message.assistant .message-text {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    border-top-left-radius: var(--radius-sm);
}

.message.user .message-text {
    background: var(--color-primary);
    color: #fff;
    border-top-right-radius: var(--radius-sm);
}

.message-text.markdown-body h1,
.message-text.markdown-body h2,
.message-text.markdown-body h3 {
    margin: var(--spacing-2) 0 var(--spacing-1);
    font-weight: var(--font-semibold);
}

.message-text.markdown-body h1 { font-size: var(--text-lg); }
.message-text.markdown-body h2 { font-size: var(--text-md); }
.message-text.markdown-body h3 { font-size: var(--text-sm); }

.message-text.markdown-body ul {
    padding-left: var(--spacing-5);
    margin: var(--spacing-1) 0;
}

.message-text.markdown-body li {
    margin-bottom: 2px;
}

.message-text.markdown-body strong {
    font-weight: var(--font-semibold);
    color: var(--color-primary);
}

.message.user .message-text.markdown-body strong {
    color: #fff;
}

.message-suggestions,
.suggestion-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    margin-top: var(--spacing-2);
}

.suggestion-btn {
    padding: var(--spacing-1) var(--spacing-3);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-full);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: var(--text-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.suggestion-btn:hover {
    border-color: var(--color-primary-200);
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 14px;
    background: var(--color-primary);
    margin-left: 2px;
    animation: blink 0.8s infinite;
    vertical-align: text-bottom;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.loading-message .message-text {
    color: var(--text-tertiary);
}

.loading-message .message-text i {
    margin-right: var(--spacing-2);
}

.stream-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    vertical-align: text-bottom;
    margin-left: 2px;
    background: var(--color-primary);
    animation: blink 0.9s infinite;
}

.message-time {
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: var(--spacing-1);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.message:hover .message-time {
    opacity: 1;
}

@media (hover: none) {
    .message-time {
        opacity: 0.7;
    }
}

.retry-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    margin-top: var(--spacing-2);
    border: 1px solid var(--color-error);
    background: transparent;
    color: var(--color-error);
    border-radius: var(--radius-sm);
    font-size: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.retry-btn:hover {
    background: var(--color-error);
    color: #fff;
}

.footer-tip-sync {
    margin: 8px 0 0;
    font-size: 12px;
    color: var(--text-tertiary);
    text-align: center;
}