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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e0e0e0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: #1890ff;
}

.logo-icon {
    margin-right: 10px;
    font-size: 28px;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* Recording Section */
.recording-section {
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.recording-area {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    min-height: 400px;
    background-color: #fafafa;
    border-radius: 8px;
    padding: 30px;
}

.preview-video {
    max-width: 100%;
    max-height: 400px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    display: none;
}

.preview-video.visible {
    display: block;
}

/* Start Panel */
.start-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.start-btn {
    background-color: #1890ff;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 12px 30px;
    font-size: 18px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.start-btn:hover {
    background-color: #40a9ff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
}

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

.btn-icon {
    font-size: 20px;
}

/* Audio Options */
.audio-options {
    display: flex;
    gap: 25px;
    margin-top: 10px;
}

.audio-option {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    cursor: pointer;
    user-select: none;
}

.audio-option input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* Recording Controls */
.recording-controls {
    display: flex;
    align-items: center;
    gap: 30px;
    margin-top: 20px;
}

.control-btn {
    background-color: #1890ff;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-btn:hover {
    background-color: #40a9ff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
}

.pause-btn {
    background-color: #faad14;
}

.pause-btn:hover {
    background-color: #ffc53d;
}

.stop-btn {
    background-color: #f5222d;
}

.stop-btn:hover {
    background-color: #ff4d4f;
}

.timer {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    min-width: 120px;
    text-align: center;
}

/* Result Panel */
.result-panel {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.result-btn {
    background-color: #1890ff;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.result-btn:hover {
    background-color: #40a9ff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
}

.restart-btn {
    background-color: #f0f0f0;
    color: #333;
}

.restart-btn:hover {
    background-color: #e0e0e0;
}

.download-btn:nth-child(3) {
    background-color: #52c41a;
}

.download-btn:nth-child(3):hover {
    background-color: #73d13d;
}

/* Guide Section */
.guide-section {
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.guide-title {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
}

.guide-container {
    display: flex;
    gap: 30px;
    align-items: flex-start;
}

/* 左侧预览区域 */
.guide-preview {
    flex: 1;
    background-color: #fafafa;
    border-radius: 8px;
    padding: 20px;
    min-height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.preview-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 6px;
    overflow: hidden;
    background-color: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

/* 右侧步骤列表 */
.guide-steps {
    width: 350px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.guide-step-item {
    padding: 15px;
    border-radius: 6px;
    background-color: #fafafa;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid transparent;
}

.guide-step-item:hover {
    background-color: #f0f5ff;
    transform: translateX(2px);
}

.guide-step-item.active {
    background-color: #1890ff;
    color: #fff;
    border-color: #1890ff;
}

.guide-step-item.active .step-title,
.guide-step-item.active .step-desc {
    color: #fff;
}

.step-title {
    font-size: 16px;
    font-weight: 600;
    color: #1890ff;
    margin-bottom: 5px;
    line-height: 1.2;
}

.step-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
    margin: 0;
}

/* Intro Section */
.intro-section {
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.intro-title {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
}

.intro-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

/* Footer */
.footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-text {
    font-size: 14px;
    color: #666;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.footer-link {
    font-size: 12px;
    color: #1890ff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: #40a9ff;
    text-decoration: underline;
}

.link-separator {
    font-size: 12px;
    color: #e0e0e0;
}

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

.data-disclaimer {
    font-size: 14px;
    color: #1890ff;
    margin: 10px 0;
    padding: 8px 12px;
    background-color: #e6f7ff;
    border-radius: 4px;
    border-left: 3px solid #1890ff;
    display: inline-block;
    max-width: 100%;
    line-height: 1.5;
}

/* Hidden Class */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .recording-section,
    .guide-section,
    .intro-section {
        padding: 20px;
    }
    
    .recording-area {
        padding: 20px;
        min-height: 300px;
    }
    
    .audio-options {
        flex-direction: column;
        gap: 15px;
    }
    
    .recording-controls {
        flex-direction: column;
        gap: 15px;
    }
    
    .result-panel {
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }
    
    .result-btn {
        width: 100%;
    }
    
    /* Guide Section Responsive */
    .guide-container {
        flex-direction: column;
        gap: 20px;
    }
    
    .guide-steps {
        width: 100%;
    }
    
    .guide-preview {
        min-height: 200px;
    }
    
    .preview-image {
        max-width: 100%;
    }
}