/* 基础布局样式 */
.section-content {
    padding: 80px 0;
    position: relative;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 视频高光集锦容器 */
.video-highlights-container {
    display: flex;
    align-items: center;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.video-highlights-left {
    flex: 1;
}

.video-highlights-right {
    flex: 1;
}

.video-highlights-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.video-highlights-description {
    font-size: 1.2rem;
    color: #666;
    line-height: 1.6;
    margin-bottom: 30px;
}

.video-highlights-start-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.video-highlights-start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

/* 核心功能图文排版布局 */
.features-showcase {
    display: flex;
    flex-direction: column;
    gap: 80px;
    margin-top: 50px;
}

.feature-showcase-item {
    display: flex;
    align-items: center;
    gap: 60px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.feature-showcase-item:hover {
    background: white;
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.feature-showcase-item.reverse {
    flex-direction: row-reverse;
}

.feature-image {
    flex: 1;
    max-width: 400px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.feature-image-placeholder {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.feature-content {
    flex: 1;
}

.feature-content h3 {
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-content p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.7;
    margin-bottom: 25px;
}

.feature-points {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-points li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 1rem;
    color: #555;
}

.feature-points li::before {
    content: '✓';
    color: #00ff88;
    font-weight: bold;
    font-size: 1.1rem;
}

/* 应用场景展示 */
.scenarios-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 50px;
}

.scenario-item {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.3s ease;
}

.scenario-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.12);
}

.scenario-image {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #4cc9f0, #4361ee);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    font-size: 1.8rem;
    color: white;
}

.scenario-item h4 {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 10px;
}

.scenario-item p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* 技术优势展示布局 */
.tech-advantages-showcase {
    display: flex;
    flex-direction: column;
    gap: 70px;
    margin-top: 50px;
}

.tech-advantage-item {
    display: flex;
    align-items: center;
    gap: 60px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.tech-advantage-item:hover {
    background: white;
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.tech-advantage-item.reverse {
    flex-direction: row-reverse;
}

.tech-advantage-image {
    flex: 1;
    max-width: 350px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-advantage-icon {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.tech-advantage-content {
    flex: 1;
}

.tech-advantage-content h3 {
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tech-advantage-content p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.7;
    margin-bottom: 25px;
}

.tech-advantage-points {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tech-advantage-points li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 1rem;
    color: #555;
    position: relative;
    padding-left: 25px;
}

.tech-advantage-points li::before {
    content: '🔹';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
    font-size: 1.1rem;
}

/* 使用流程步骤 */
.flow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.flow-step {
    text-align: center;
    position: relative;
}

.flow-step::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 50%;
    width: 80%;
    height: 2px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transform: translateX(-50%);
    z-index: 1;
}

.flow-step:last-child::before {
    display: none;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    position: relative;
    z-index: 2;
}

.flow-step h4 {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 10px;
}

.flow-step p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* 问答区域样式 */
.faq-section {
    background: linear-gradient(135deg, #f0f8ff 0%, #e6f2ff 100%);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.faq-question {
    padding: 20px 25px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.05), rgba(76, 201, 240, 0.05));
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.1), rgba(76, 201, 240, 0.1));
}

.faq-question span {
    color: #667eea;
    font-weight: bold;
    margin-right: 10px;
}

.faq-icon {
    font-size: 1rem;
    color: #667eea;
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    background: white;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px 25px;
    max-height: 300px;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer p {
    color: #666;
    line-height: 1.6;
    margin: 0;
    font-size: 1rem;
}

.faq-answer p + p {
    margin-top: 10px;
}

/* 区域背景色设置 */
.value-proposition-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin-bottom: 40px;
}

.video-highlights-container {
    background: linear-gradient(135deg, #fafbff 0%, #f5f7ff 100%);
}

.core-features {
    background: linear-gradient(135deg, #f0f4ff 0%, #e8edff 100%);
}

.application-scenarios {
    background: linear-gradient(135deg, #fff5f5 0%, #fff0f0 100%);
}

.tech-advantages {
    background: linear-gradient(135deg, #f0fff4 0%, #e8ffe8 100%);
}

.usage-flow {
    background: linear-gradient(135deg, #fffaf0 0%, #fff5e6 100%);
}

.faq-section {
    background: linear-gradient(135deg, #f0f8ff 0%, #e6f2ff 100%);
}

footer {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

/* 特色功能卡片样式 */
.feature-highlights {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.feature-card.highlight {
    display: flex;
    align-items: center;
    gap: 20px;
    background: rgba(102, 126, 234, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.1);
    border-radius: 15px;
    padding: 20px;
    transition: all 0.3s ease;
}

.feature-card.highlight:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.15);
}

.feature-card.highlight .feature-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    font-size: 1.5rem;
    color: white;
}

.feature-card.highlight h4 {
    color: #667eea;
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.feature-card.highlight p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

/* 价值主张横幅样式 */
.value-proposition-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 0;
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
}

.value-proposition-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.banner-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.banner-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #fff, #4cc9f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner-description {
    font-size: 1.2rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.feature-highlights-mini {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.feature-badge {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.feature-badge:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 各部分背景色 */
.core-features {
    background: linear-gradient(135deg, #f8f9ff 0%, #eef0ff 100%);
}

.application-scenarios {
    background: white;
}

.tech-advantages {
    background: linear-gradient(135deg, #f0f4ff 0%, #e6ebff 100%);
}

.usage-flow {
    background: white;
}

/* 公共标题样式 */
.section-title {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
    text-align: center;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .video-highlights-container {
        flex-direction: column;
        gap: 40px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scenarios-showcase {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .flow-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .flow-step::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .video-highlights-title {
        font-size: 2.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .scenarios-showcase {
        grid-template-columns: 1fr;
    }
    
    .flow-steps {
        grid-template-columns: 1fr;
    }
    
    .banner-content h2 {
        font-size: 2rem;
    }
    
    .banner-description {
        font-size: 1rem;
    }
    
    .feature-highlights-mini {
        gap: 10px;
    }
    
    .feature-badge {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
}

@media (max-width: 480px) {
    .video-highlights-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .banner-content h2 {
        font-size: 1.8rem;
    }
    
    .feature-highlights-mini {
        flex-direction: column;
        align-items: center;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card-large,
.scenario-item,
.advantage-item,
.flow-step {
    animation: fadeInUp 0.6s ease forwards;
}

.feature-card-large:nth-child(1) { animation-delay: 0.1s; }
.feature-card-large:nth-child(2) { animation-delay: 0.2s; }
.feature-card-large:nth-child(3) { animation-delay: 0.3s; }
.feature-card-large:nth-child(4) { animation-delay: 0.4s; }

.scenario-item:nth-child(1) { animation-delay: 0.1s; }
.scenario-item:nth-child(2) { animation-delay: 0.2s; }
.scenario-item:nth-child(3) { animation-delay: 0.3s; }
.scenario-item:nth-child(4) { animation-delay: 0.4s; }

.advantage-item:nth-child(1) { animation-delay: 0.1s; }
.advantage-item:nth-child(2) { animation-delay: 0.2s; }
.advantage-item:nth-child(3) { animation-delay: 0.3s; }
.advantage-item:nth-child(4) { animation-delay: 0.4s; }

.flow-step:nth-child(1) { animation-delay: 0.1s; }
.flow-step:nth-child(2) { animation-delay: 0.2s; }
.flow-step:nth-child(3) { animation-delay: 0.3s; }
.flow-step:nth-child(4) { animation-delay: 0.4s; }