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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
                 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    overflow: hidden;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 800px;
    margin: 0 auto;
    background: white;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.1);
}

/* 头部样式 */
.chat-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 10;
}

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

.logo-icon {
    width: 32px;
    height: 32px;
    color: white;
}

.chat-header h1 {
    font-size: 20px;
    font-weight: 600;
}

/* 消息区域 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: #f5f7fa;
    scroll-behavior: smooth;
}

.message {
    display: flex;
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease-in;
}

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

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

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

.user-avatar {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.message-content {
    margin-left: 12px;
    max-width: calc(100% - 60px);
}

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

.user-message .message-content {
    margin-left: 0;
    margin-right: 12px;
}

.message-text {
    padding: 12px 16px;
    border-radius: 18px;
    line-height: 1.5;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.bot-message .message-text {
    background: white;
    color: #333;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

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

/* 输入区域 */
.chat-input-wrapper {
    border-top: 1px solid #e5e7eb;
    background: white;
    padding: 12px 20px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom));
}

.chat-input-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.voice-button,
.send-button {
    width: 42px;
    height: 42px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s, box-shadow 0.2s;
    flex-shrink: 0;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

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

.voice-button:hover,
.send-button:hover {
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.voice-button.recording {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    animation: pulse 1.5s infinite;
    transform: scale(1.1);
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.voice-icon,
.send-icon {
    width: 20px;
    height: 20px;
}

.message-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #e5e7eb;
    border-radius: 21px;
    font-size: 15px;
    outline: none;
    transition: border-color 0.2s;
}

.message-input:focus {
    border-color: #667eea;
}

.voice-status {
    margin-top: 8px;
    text-align: center;
    font-size: 13px;
    color: #666;
    min-height: 20px;
}

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-overlay.show {
    display: flex;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 消息加载动画 */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #999;
    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: 0.7;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* 滚动条样式 */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #f1f1f1;
}

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

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .chat-container {
        max-width: 100%;
        border-radius: 0;
    }
    
    .chat-header h1 {
        font-size: 18px;
    }
    
    .message-text {
        font-size: 14px;
    }
}