* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.chat-container {
    width: 90%;
    max-width: 450px;
    height: 90vh;
    max-height: 800px;
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* 聊天头部 */
.chat-header {
    background: linear-gradient(135deg, #7c9e6f 0%, #5a7a50 100%);
    color: white;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.header-info h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 2px;
}

.status {
    font-size: 12px;
    opacity: 0.9;
}

/* 消息区域 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: #f5f7fa;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #cbd5e0;
    border-radius: 3px;
}

.message {
    display: flex;
    gap: 10px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #7c9e6f 0%, #5a7a50 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.message-content {
    display: flex;
    flex-direction: column;
    max-width: 70%;
}

.message-text {
    background: white;
    padding: 12px 16px;
    border-radius: 18px;
    border-top-left-radius: 4px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
    line-height: 1.5;
    word-wrap: break-word;
    font-size: 14px;
}

.message-images {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.message-image {
    max-width: 200px;
    max-height: 200px;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
}

.message-image:hover {
    transform: scale(1.05);
}

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

.user-message .message-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

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

.user-message .message-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-top-left-radius: 18px;
    border-top-right-radius: 4px;
}

.bot-message .message-text {
    background: white;
}

/* 输入打字效果 */
.typing-indicator {
    display: flex;
    gap: 10px;
}

.typing-indicator .message-text {
    display: flex;
    gap: 4px;
    align-items: center;
    padding: 12px 16px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #a0aec0;
    animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* 输入区域 */
.chat-input-container {
    background: white;
    padding: 15px 20px;
    border-top: 1px solid #e2e8f0;
}

.image-preview {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 10px;
    max-height: 150px;
    overflow-y: auto;
}

.preview-item {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid #e2e8f0;
}

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

.remove-image {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-image:hover {
    background: rgba(0, 0, 0, 0.8);
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    background: #f7fafc;
    border-radius: 24px;
    padding: 8px 12px;
    border: 2px solid transparent;
    transition: border-color 0.3s;
}

.input-wrapper:focus-within {
    border-color: #7c9e6f;
}

.image-button {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: #718096;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}

.image-button:hover {
    background: rgba(124, 158, 111, 0.1);
    color: #7c9e6f;
}

.image-button:active {
    transform: scale(0.95);
}

#messageInput {
    flex: 1;
    border: none;
    background: transparent;
    outline: none;
    resize: none;
    font-size: 14px;
    line-height: 1.5;
    max-height: 100px;
    overflow-y: auto;
    font-family: inherit;
    padding: 4px 0;
}

#messageInput::-webkit-scrollbar {
    width: 4px;
}

#messageInput::-webkit-scrollbar-thumb {
    background: #cbd5e0;
    border-radius: 2px;
}

.send-button {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #7c9e6f 0%, #5a7a50 100%);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s, box-shadow 0.2s;
    flex-shrink: 0;
}

.send-button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(124, 158, 111, 0.4);
}

.send-button:active {
    transform: scale(0.95);
}

.send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .chat-container {
        width: 100%;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
    }
}