/* 全局样式 */
:root {
    --primary-color: #8B4513;
    --secondary-color: #D2691E;
    --background-color: #F5F5DC;
    --text-color: #333;
    --border-color: #DEB887;
    --hover-color: #A0522D;
}

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

body {
    font-family: "Microsoft YaHei", sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 800px;
    height: 90vh;
}

/* 聊天框样式 */
.chat-box {
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* 聊天头部样式 */
.chat-header {
    background-color: var(--primary-color);
    color: white;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 3px solid var(--border-color);
}

.header-info h2 {
    font-size: 1.5em;
    margin-bottom: 5px;
}

.header-info p {
    font-size: 0.9em;
    opacity: 0.9;
}

/* 聊天消息区域样式 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background-color: #f9f9f9;
}

.message {
    margin-bottom: 15px;
    padding: 12px 15px;
    border-radius: 10px;
    max-width: 80%;
    word-wrap: break-word;
}

.user-message {
    background-color: var(--secondary-color);
    color: white;
    margin-left: auto;
}

.bot-message {
    background-color: #e9ecef;
    margin-right: auto;
}

/* 输入区域样式 */
.chat-input {
    padding: 20px;
    background-color: white;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
}

.chat-input textarea {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    resize: none;
    height: 60px;
    font-family: inherit;
    font-size: 1em;
}

.chat-input textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.chat-input button {
    padding: 0 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s;
    font-size: 1.2em;
}

.chat-input button:hover {
    background-color: var(--hover-color);
}

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 工具类 */
.hidden {
    display: none !important;
}