/* 全局样式 */
:root {
    --primary-color: #2c6fbb;
    --secondary-color: #4a90e2;
    --light-blue: #e8f2ff;
    --dark-blue: #1a4d8c;
    --text-dark: #333;
    --text-light: #666;
    --border-color: #e0e0e0;
    --success-color: #28a745;
    --error-color: #dc3545;
    --warning-color: #ffc107;
    --cta-gradient: linear-gradient(135deg, #D6FB72 0%, #76F9B1 100%);

}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: 
        /* 增强的主背景渐变 - 更高对比度 */
        linear-gradient(135deg, #050505 0%, #0f0f0f 25%, #2a2a2a 50%, #0f0f0f 75%, #050505 100%),
        /* 增强的科技蓝光晕效果 - 更高亮度 */
        radial-gradient(circle at 20% 80%, rgba(0, 168, 255, 0.35) 0%, transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(0, 123, 255, 0.3) 0%, transparent 40%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.2) 0%, transparent 30%),
        radial-gradient(circle at 60% 60%, rgba(0, 168, 255, 0.15) 0%, transparent 35%);
    background-attachment: fixed;
    color: #ffffff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    position: relative;
    overflow-x: hidden;
}

/* 增强的波浪效果容器 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(0, 168, 255, 0.3) 0%, transparent 40%),
        radial-gradient(ellipse at 70% 80%, rgba(0, 123, 255, 0.25) 0%, transparent 40%),
        radial-gradient(ellipse at 20% 70%, rgba(0, 168, 255, 0.2) 0%, transparent 45%),
        radial-gradient(ellipse at 80% 30%, rgba(0, 123, 255, 0.15) 0%, transparent 45%);
    animation: waveAnimation 15s ease-in-out infinite;
    z-index: -1;
}

/* 固定的光点光晕效果 */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 3%),
        radial-gradient(circle at 90% 30%, rgba(255, 255, 255, 0.06) 0%, transparent 3%),
        radial-gradient(circle at 50% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 3%),
        radial-gradient(circle at 20% 70%, rgba(255, 255, 255, 0.07) 0%, transparent 3%),
        radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.04) 0%, transparent 3%),
        radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.06) 0%, transparent 3%),
        /* 新增固定光晕效果 */
        radial-gradient(circle at 15% 60%, rgba(0, 168, 255, 0.08) 0%, transparent 5%),
        radial-gradient(circle at 85% 40%, rgba(0, 123, 255, 0.06) 0%, transparent 5%);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 70%;
    margin: 0 auto;
    padding: 0 30px;
}

/* 功能特性标题样式 */
.features-title {
    color: #ffffff;
    font-size: 2rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
}

.title-section {
    text-align: center;
    margin-bottom: 40px;
}

/* 头部样式 */


.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 步骤部分 */
steps-section {
    margin-top: 60px;
    text-align: center;
}

.steps-title {
    color: #ffffff;
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 40px;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.step-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.step-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #00a8ff, #007bff);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 15px;
}

.step-item h3 {
    color: #ffffff;
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.step-item p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    line-height: 1.5;
}


.icon-wrapper {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 136, 0.1);
    border-radius: 20px;
    border: 2px solid rgba(0, 255, 136, 0.3);
}

.voice-avatars-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    width: 140px;
    margin: 0 auto;
}

.mini-avatar {
    width: 30px;
    height: 30px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.generate-button-wrapper {
    display: flex;
    justify-content: center;
}

.generate-preview-btn {
    background: linear-gradient(45deg, #00ff88, #00e078);
    color: #000;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 255, 136, 0.3);
    display: flex;
    align-items: center;
    gap: 8px;
}

.generate-preview-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 255, 136, 0.4);
}

.generate-icon {
    font-size: 1.1rem;
}

.step-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 15px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.step-description {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.5;
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .steps-comparison-container {
        flex-direction: column;
        gap: 30px;
    }
    
    .step-comparison-item {
        padding: 30px 20px;
    }
    
    .voice-avatars-grid {
        width: 120px;
        grid-template-columns: repeat(4, 1fr);
    }
    
    .mini-avatar {
        width: 25px;
        height: 25px;
        font-size: 10px;
    }
    
    .generate-preview-btn {
        padding: 10px 20px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .comparison-section {
        padding: 60px 0;
    }
    
    .step-title {
        font-size: 1.1rem;
    }
    
    .step-description {
        font-size: 0.9rem;
    }
    
    .icon-wrapper {
        width: 70px;
        height: 70px;
        border-radius: 15px;
    }
}


/* 功能部分 */
.features-section {
    padding: 80px 0;
    background: none;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #00ff88;
    text-align: center;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #ffffff;
}

/* 应用场景部分 */
.use-cases-section {
    padding: 80px 0;
    background: none;
}

.use-cases-grid {
    
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(30%, 1fr));
    gap: 30px;
    margin-bottom: 20px;
  
}

.use-case-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 30px;
    transition: all 0.3s ease;
    border-left: 4px solid #00ff88;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.use-case-card:hover {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px);
}

.use-case-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #00ff88;
    text-align: center;
}

.use-case-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #ffffff;
    text-align: center;
}

.use-case-card p {
    color: rgba(255, 255, 255, 0.8);
}

.section-title {
    font-size: 1.8rem;
    padding-bottom: 30px;
}



/* 响应式设计 */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .vs {
        margin: 30px 0;
    }

    .ai-tts-container {
        flex-direction: column;
        gap: 30px;
        padding: 0 20px;
    }
    
    .ai-tts-title {
        font-size: 2rem;
    }
    
    .voice-role-grid {
        grid-template-columns: 1fr;
    }
    
    .ai-tts-left,
    .ai-tts-right {
        min-width: auto;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .ai-tts-hero {
        padding: 40px 0;
    }
    
    .ai-tts-title {
        font-size: 1.5rem;
    }
    
    .voice-role-card {
        padding: 10px;
    }
    
    .voice-avatar {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

/* 常见问题 (FAQ) 样式 */
.faq-section {
    padding: 80px 0;
    background: none;
    width: 70%;
    margin: 0 auto;
}

.faq-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 50px;
    color: var(--light-color);
}

.faq-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

.faq-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.faq-question {
    padding: 20px 25px;
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.1);
}

.faq-question span {
    color: #00ff88;
    margin-right: 10px;
}

.faq-icon {
    font-size: 1.2rem;
    color: #00ff88;
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.faq-answer p {
    margin-bottom: 15px;
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 25px 25px;
}

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

/* FAQ 响应式设计 */
@media (max-width: 768px) {
    .faq-section {
        padding: 60px 0;
    }
    
    .faq-title {
        font-size: 1.8rem;
    }
    
    .faq-question {
        padding: 15px 20px;
        font-size: 1rem;
    }
    
    .faq-answer {
        padding: 0 20px;
    }
    
    .faq-item.active .faq-answer {
        padding: 0 20px 20px;
    }
}


.cta-section {
    background: var(--cta-gradient);
    padding: 2rem;
    border-radius: 0.5rem;
    text-align: center;
}

.cta-title {
    color: #2D2D33;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.cta-text {
    color: #2D2D33;
    margin-bottom: 1.5rem;
}

.cta-button-dark {
    background: #2D2D33;
    color: white;
    border: none;
    border-radius: 0.5rem;
    padding: 0.75rem 2rem;
    font-size: 1.1rem;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.cta-button-dark:hover {
    background: #1E1E1E;
    transform: translateY(-2px);
}


/* SEO优化内容样式 - 左图右文布局 */
.seo-content {
    padding: 60px 0;
    background: none;
    width: 70%;
    margin: 0 auto;
}
.seo-content h1 {
    font-size: 3rem;
    color: #00a8ff;
    text-align: center;
    margin-bottom: 10px;
    font-weight: 700;
    
    letter-spacing: 10px;
}
.seo-content h2 {
    font-size: 2.2rem;
    color: #00a8ff;
    text-align: center;
    margin-bottom: 40px;
    font-weight: 700;
}

.seo-content h3 {
    font-size: 1.6rem;
    color: #ffffff;
    margin: 30px 0 20px;
    font-weight: 600;
}

.seo-content p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.seo-content ul {
    margin-bottom: 30px;
    padding-left: 20px;
}

.seo-content li {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.seo-content strong {
    color: #00ff88;
}

/* 图文并排布局 */
.seo-image-text {
    display: flex;
    gap: 40px;
    margin: 40px 0;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.seo-image {
    flex: 0 0 400px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.seo-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.seo-image img:hover {
    transform: scale(1.05);
}

.seo-text {
    flex: 1;
    
}

/* 关键词标签样式 */
.keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0 30px;
}

.keyword-tag {
    background: linear-gradient(135deg, #00a8ff, #007bff);
    color: #ffffff;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.keyword-tag:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 168, 255, 0.4);
}

/* 用户评价样式 - 卡片布局 */
.reviews-section {
    background: none;
    width: 70%;
    margin: 0 auto;
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.review-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 30px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.review-card:hover {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transform: translateY(-5px);
}

.review-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    gap: 15px;
}

.review-header img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #00ff88;
}

.review-info {
    flex: 1;
}

.review-author {
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 5px;
}

.review-rating {
    color: #ffd700;
    font-size: 1.1rem;
}

.review-content {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.7;
    font-size: 1rem;
    font-style: italic;
    position: relative;
    padding-left: 20px;
}

.review-content::before {
    content: '"';
    font-size: 3rem;
    color: #00ff88;
    position: absolute;
    left: 0;
    top: -10px;
    opacity: 0.3;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .seo-image-text {
        flex-direction: column;
        text-align: center;
    }
    
    .seo-image {
        flex: none;
        width: 100%;
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .review-grid {
        grid-template-columns: 1fr;
    }
    
    .seo-content h2 {
        font-size: 1.8rem;
    }
    
    .seo-content h3 {
        font-size: 1.4rem;
    }
    
    .review-card {
        padding: 20px;
    }
    
    .seo-image-text {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .seo-image {
        max-width: 300px;
    }
    
    .review-header {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .review-header img {
        width: 50px;
        height: 50px;
    }
}

/* 标题样式 */
.main-title {
    color: #00a8ff;
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 168, 255, 0.3);
}

.subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.2rem;
    margin-bottom: 40px;
    line-height: 1.6;
}

/* 上传区域样式 */
.upload-section {
    background: rgba(255, 255, 255, 0.05);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    padding: 60px 40px;
    margin: 30px 0;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    text-align: center;
}

.upload-section:hover {
    border-color: rgba(0, 168, 255, 0.5);
    background: rgba(255, 255, 255, 0.08);
}

.upload-icon {
    font-size: 4rem;
    color: #00a8ff;
    margin-bottom: 20px;
    opacity: 0.8;
}

.upload-text {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: 25px;
}

/* 上传按钮样式 */
.upload-btn {
    background: linear-gradient(135deg, #00a8ff 0%, #007bff 100%);
    color: #ffffff;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 168, 255, 0.3);
    margin: 10px 0;
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 168, 255, 0.5);
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
}

.upload-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(0, 168, 255, 0.3);
}

/* 文件信息样式 */
.file-info {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin-top: 15px;
    line-height: 1.4;
}