.chat-container {
    background: #ffffff;
    position: relative;
}

.messages {
    padding-bottom: 2rem;
}

.message {
    opacity: 0;
    transform: translateY(20px);
    animation: messageSlideIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.message:nth-child(even) {
    animation-delay: 0.1s;
}

@keyframes messageSlideIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.user .message-avatar {
    background: var(--primary-color);
    border: 2px solid #ffffff;
    color: var(--text-color);
}

.message.assistant .message-avatar {
    background: var(--success-color);
    border: 2px solid #ffffff;
    color: var(--text-color);
}

.message.system .message-avatar {
    background: var(--warning-color);
    border: 2px solid #ffffff;
    color: var(--text-color);
}

.message-content {
    line-height: 1.6;
}

.message-content p {
    margin-bottom: 0.5rem;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content code {
    background: rgba(0, 0, 0, 0.05);
    padding: 0.3rem 0.6rem;
    border-radius: 12px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.message-content pre {
    background: var(--secondary-color);
    padding: 1.5rem;
    border-radius: 16px;
    overflow-x: auto;
    margin: 1rem 0;
    border-left: 4px solid var(--dark-color);
    box-shadow: var(--soft-shadow);
    border: 1px solid var(--border-color);
}

.message-content pre code {
    background: none;
    padding: 0;
    border: none;
    font-size: 0.85rem;
}

.streaming-text {
    position: relative;
}

.streaming-text::after {
    content: '▋';
    animation: blink 1.2s infinite;
    color: var(--dark-color);
    margin-left: 2px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.role-indicator {
    background: var(--secondary-color);
    color: var(--text-color);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    box-shadow: var(--soft-shadow);
    border: 1px solid var(--border-color);
}

.role-indicator::before {
    content: '👤 ';
    margin-right: 0.5rem;
}

.error-message {
    background: var(--danger-color);
    color: var(--text-color);
    border: 1px solid #f87171;
    box-shadow: var(--shadow);
}

.retry-btn {
    background: var(--primary-color);
    color: var(--text-color);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 20px;
    cursor: pointer;
    margin-top: 0.75rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 500;
    box-shadow: var(--soft-shadow);
    border: 1px solid var(--border-color);
}

.retry-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    color: var(--dark-color);
}

/* 聊天输入区域增强 */
.input-section {
    background: #ffffff;
    border-top: 1px solid var(--border-color);
    position: sticky;
    bottom: 0;
    z-index: 20;
}

.input-section::before {
    content: '';
    position: absolute;
    top: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--pearl-color));
    opacity: 0.8;
}

.chat-input textarea {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: #ffffff;
    color: var(--text-color);
}

.chat-input textarea:focus {
    background: #ffffff;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.send-btn {
    background: var(--primary-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.send-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    color: var(--dark-color);
}

.send-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

.send-btn:active::before {
    width: 120px;
    height: 120px;
}

/* 滚动条样式 */
.chat-container::-webkit-scrollbar {
    width: 10px;
}

.chat-container::-webkit-scrollbar-track {
    background: var(--secondary-color);
    border-radius: 8px;
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 8px;
    border: 2px solid var(--secondary-color);
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

/* 快速回答按钮样式 */
.quick-replies {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    animation: quickRepliesSlideIn 0.3s ease-out forwards;
    opacity: 0;
    transform: translateY(10px);
}

@keyframes quickRepliesSlideIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.quick-reply-btn {
    background: var(--secondary-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 15px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    font-weight: 500;
    box-shadow: var(--soft-shadow);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.quick-reply-btn::after {
    content: "↗";
    font-size: 0.7rem;
    opacity: 0.6;
    margin-left: 0.2rem;
}

.quick-reply-btn:hover {
    background: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
    border-color: var(--dark-color);
}

.quick-reply-btn:hover::after {
    opacity: 1;
    transform: scale(1.1);
}

.quick-reply-btn:active {
    transform: translateY(0);
    background: var(--pearl-color);
}

.quick-reply-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.quick-reply-btn:active::before {
    width: 100px;
    height: 100px;
}