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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background: #f8f9fa;
    color: #1a1a1a;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

.chat-area {
    background: white;
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

/* 消息块 */
.message-block {
    margin-bottom: 32px;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 14px;
    font-weight: 600;
    color: #666;
}

.icon {
    flex-shrink: 0;
}

/* 用户消息 */
.user-message {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.user-message .message-text {
    background: rgba(0, 0, 0, 0.03);
    padding: 14px 18px;
    border-radius: 16px;
    max-width: 60%;
    font-size: 15px;
    line-height: 1.5;
}

/* AI消息 */
.assistant-message {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

/* 等待动画 */
.generating-placeholder {
    display: flex;
    gap: 4px;
    padding: 12px 0;
    font-size: 15px;
    font-weight: 500;
    color: #999;
}

.generating-placeholder .letter {
    display: inline-block;
    animation: wave 1.6s ease-in-out infinite;
    opacity: 0.4;
}

.generating-placeholder .letter:nth-child(1) { animation-delay: 0s; }
.generating-placeholder .letter:nth-child(2) { animation-delay: 0.1s; }
.generating-placeholder .letter:nth-child(3) { animation-delay: 0.2s; }
.generating-placeholder .letter:nth-child(4) { animation-delay: 0.3s; }
.generating-placeholder .letter:nth-child(5) { animation-delay: 0.4s; }
.generating-placeholder .letter:nth-child(6) { animation-delay: 0.5s; }

@keyframes wave {
    0%, 100% {
        opacity: 0.4;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(-3px);
    }
}

/* 摘要行 */
.summary-line {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 10px 0;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: opacity 0.15s ease;
}

.summary-line:hover {
    opacity: 0.7;
}

.summary-icon {
    flex-shrink: 0;
    color: #999;
    margin-top: 2px;
}

.summary-text {
    font-size: 13px;
    color: #999;
    position: relative;
    display: inline-block;
    line-height: 1.5;
}

/* 文字渐变消失效果 */
.summary-text::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 30px;
    background: linear-gradient(to right, transparent, white);
    pointer-events: none;
}

/* 运行中的闪光效果 */
.shimmer-overlay {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(100, 100, 255, 0.15) 50%,
        transparent 100%
    );
    animation: shimmer 2s infinite;
    pointer-events: none;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.summary-line.completed .shimmer-overlay {
    display: none;
}

/* 摘要行展开时的连接线 */
.summary-line.expanded {
    padding-bottom: 0;
}

.summary-line.expanded .summary-icon {
    position: relative;
}

.summary-line.expanded .summary-icon::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 100%;
    transform: translateX(-50%);
    width: 2px;
    height: 8px;
    background: #e0e0e0;
}

/* 详细视图 */
.detail-view {
    margin-top: 0;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: opacity 0.15s ease, max-height 0.15s ease;
}

.detail-view.show {
    opacity: 1;
    max-height: 2000px;
}

.timeline-container {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

/* 时间线 */
.timeline {
    display: flex;
    flex-direction: column;
    padding-top: 0;
    flex-shrink: 0;
}

.timeline-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0;
    transform: translateY(-5px);
}

/* 第一个时间线项（没有图标，只有竖线） */
.timeline-item-first {
    padding-top: 0;
}

.timeline-item-first .timeline-line {
    margin-top: 0;
}

.timeline-item.instant {
    animation: fadeInInstant 0.1s ease forwards;
}

.timeline-item.animated {
    animation: fadeInDown 0.4s ease forwards;
}

.timeline-icon {
    flex-shrink: 0;
    color: #666;
    background: white;
    border-radius: 50%;
    padding: 2px;
}

.timeline-line {
    width: 2px;
    background: #e0e0e0;
    margin: 4px 0;
    transition: height 0.2s ease;
}

.timeline-item:last-child .timeline-line {
    display: none;
}

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

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

/* 内容区域 */
.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0;
    min-width: 0;
}

.content-item {
    opacity: 0;
    transform: translateX(-5px);
    margin-bottom: 20px;
}

.content-item.instant {
    animation: fadeInInstant 0.1s ease forwards;
}

.content-item.animated {
    animation: fadeInLeft 0.4s ease forwards;
}

@keyframes fadeInLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.content-header {
    font-size: 12px;
    font-weight: 600;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

/* 第一个内容项不显示header */
.content-item[data-step="0"] .content-header {
    display: none;
}

/* 思考类型的内容项不显示header */
.content-item.thinking-type .content-header {
    display: none;
}

.content-body {
    font-size: 14px;
    line-height: 1.6;
    color: #333;
}

/* 思考内容 */
.thinking-content {
    color: #666;
    font-size: 14px;
    line-height: 1.7;
    max-height: 100px;
    overflow: hidden;
    position: relative;
}

.thinking-content-full {
    color: #666;
    font-size: 14px;
    line-height: 1.7;
}

.show-more-btn,
.show-less-btn {
    display: inline-block;
    margin-top: 8px;
    padding: 4px 12px;
    background: transparent;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 12px;
    color: #666;
    cursor: pointer;
    transition: all 0.2s ease;
}

.show-more-btn:hover,
.show-less-btn:hover {
    background: #f5f5f5;
    border-color: #999;
}

/* 工具内容 */
.tool-intent {
    font-weight: 500;
    color: #444;
    margin-bottom: 12px;
}

.tool-result {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 12px;
}

.result-item {
    padding: 8px 0;
    border-bottom: 1px solid #e0e0e0;
}

.result-item:last-child {
    border-bottom: none;
}

.result-title {
    font-weight: 500;
    color: #333;
    margin-bottom: 4px;
}

.result-url {
    font-size: 12px;
    color: #999;
}

/* 命令块 */
.command-block {
    background: #f8f9fa;
    border-radius: 8px;
    overflow: hidden;
}

.command-header {
    background: #e9ecef;
    padding: 8px 12px;
    font-size: 12px;
    color: #666;
}

.command-code {
    padding: 12px;
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 13px;
    color: #333;
    overflow-x: auto;
}

.command-output {
    padding: 12px;
    border-top: 1px solid #e0e0e0;
}

.output-line {
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 12px;
    color: #666;
    line-height: 1.8;
}

/* 最终输出 */
.text-output {
    margin-top: 16px;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.5s ease;
}

.text-output.show {
    opacity: 1;
    transform: translateY(0);
}

.text-content {
    font-size: 15px;
    line-height: 1.7;
    color: #333;
}

.text-content p {
    margin-bottom: 16px;
}

.text-content ol {
    margin-left: 24px;
    margin-bottom: 16px;
}

.text-content li {
    margin-bottom: 12px;
}

.text-content strong {
    font-weight: 600;
    color: #1a1a1a;
}

/* 控制面板 */
.control-panel {
    margin-top: 32px;
    display: flex;
    gap: 12px;
    justify-content: center;
}

.control-btn {
    padding: 10px 20px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.control-btn:hover {
    background: #0056b3;
    transform: translateY(-1px);
}

.control-btn:active {
    transform: translateY(0);
}