/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 全局变量 */
:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4cc9f0;
    --text-color: #333;
    --light-text: #666;
    --white: #ffffff;
    --light-bg: #f8f9fa;
    --dark-bg: #0d1b2a;
    --border-radius: 12px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* 基础样式 */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    overflow-x: hidden;
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar.scrolled {
    padding: 15px 0;
    box-shadow: var(--box-shadow);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 16px;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* 下载按钮样式 - downlbtnvmmn */
.download-btn.downlbtnvmmn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
    box-shadow: 0 5px 15px rgba(67, 97, 238, 0.3);
}

.download-btn.downlbtnvmmn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
    z-index: -1;
}

.download-btn.downlbtnvmmn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(67, 97, 238, 0.4);
}

.download-btn.downlbtnvmmn:hover::before {
    left: 100%;
}

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

.download-btn.downlbtnvmmn.large {
    padding: 16px 32px;
    font-size: 18px;
}

.download-btn.downlbtnvmmn.platform {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    min-width: 180px;
    justify-content: center;
}

.platform-icon {
    font-size: 24px;
}

.platform-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.platform-name {
    font-weight: 600;
    font-size: 16px;
}

.platform-version {
    font-size: 14px;
    opacity: 0.8;
}

/* 首屏样式 */
.hero {
    padding: 180px 0 120px;
    background: linear-gradient(135deg, #f5f7ff 0%, #eef2ff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 50%;
    height: 120%;
    background: radial-gradient(circle, rgba(67, 97, 238, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.hero-text {
    flex: 1;
}

.hero-text h2 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 18px;
    color: var(--light-text);
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.learn-more {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.learn-more:hover {
    transform: translateX(5px);
}

.hero-stats {
    display: flex;
    gap: 40px;
    padding-top: 20px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-item .number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-item .label {
    font-size: 14px;
    color: var(--light-text);
    margin-top: 5px;
}

.hero-image {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
}

.main-image {
    width: 100%;
    max-width: 600px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transform: perspective(1000px) rotateY(5deg);
    transition: var(--transition);
}

.main-image:hover {
    transform: perspective(1000px) rotateY(0);
}

.decor-circle {
    position: absolute;
    border-radius: 50%;
    z-index: -1;
}

.circle-1 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-color) 0%, transparent 70%);
    top: -50px;
    right: -50px;
    opacity: 0.2;
}

.circle-2 {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
    bottom: -30px;
    left: 50px;
    opacity: 0.2;
}

/* 通用节标题样式 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-color);
}

.section-header p {
    font-size: 16px;
    color: var(--light-text);
    max-width: 700px;
    margin: 0 auto;
}

/* 功能介绍样式 */
.features {
    padding: 120px 0;
    background-color: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-color);
}

.feature-card p {
    font-size: 15px;
    color: var(--light-text);
    line-height: 1.6;
}

/* 产品优势样式 */
.advantages {
    padding: 120px 0;
    background-color: var(--light-bg);
}

.advantage-content {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.advantage-item {
    display: flex;
    align-items: center;
    gap: 50px;
}

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

.advantage-image {
    flex: 1;
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
}

.advantage-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.advantage-text {
    flex: 1;
}

.advantage-text h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-color);
}

.advantage-text p {
    font-size: 16px;
    color: var(--light-text);
    line-height: 1.8;
}

/* 用户评价样式 */
.testimonials {
    padding: 120px 0;
    background-color: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

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

.user-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
}

.user-details h4 {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
    color: var(--text-color);
}

.user-details p {
    font-size: 14px;
    color: var(--light-text);
    margin: 5px 0 0;
}

.testimonial-text {
    font-size: 16px;
    color: var(--light-text);
    line-height: 1.8;
    margin-bottom: 20px;
    font-style: italic;
}

.rating {
    font-size: 20px;
    color: #ffc107;
    font-weight: bold;
}

/* 下载区域样式 */
.download-section {
    padding: 120px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    text-align: center;
}

.download-content h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
}

.download-content p {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

/* 页脚样式 */
.footer {
    background-color: var(--dark-bg);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.footer-logo p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

.footer-links h4,
.footer-contact h4,
.footer-social h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
    font-size: 14px;
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-contact p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 10px;
    line-height: 1.6;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
    font-size: 18px;
}

.social-icon:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-5px);
}

/* FAQ页面样式 */
.faq-hero {
    padding: 150px 0 100px;
    background: linear-gradient(135deg, #f5f7ff 0%, #eef2ff 100%);
    text-align: center;
}

.faq-hero h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-color);
}

.faq-hero p {
    font-size: 18px;
    color: var(--light-text);
    max-width: 800px;
    margin: 0 auto;
}

.faq-content {
    padding: 100px 0;
    background-color: var(--white);
}

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

.faq-item {
    margin-bottom: 20px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.faq-question {
    width: 100%;
    padding: 20px;
    background-color: var(--white);
    border: none;
    text-align: left;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background-color: var(--light-bg);
}

.faq-question::after {
    content: '+';
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-question.active::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer-content {
    padding: 0 20px 20px;
    font-size: 16px;
    color: var(--light-text);
    line-height: 1.8;
}

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

/* 联系我们页面样式 */
.contact-hero {
    padding: 150px 0 100px;
    background: linear-gradient(135deg, #f5f7ff 0%, #eef2ff 100%);
    text-align: center;
}

.contact-hero h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-color);
}

.contact-hero p {
    font-size: 18px;
    color: var(--light-text);
    max-width: 800px;
    margin: 0 auto;
}

.contact-content {
    padding: 100px 0;
    background-color: var(--white);
}

.contact-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
    align-items: flex-start;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-form {
    flex: 2;
    min-width: 300px;
}

.contact-info h2,
.contact-form h2 {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--text-color);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-color);
}

.contact-details p {
    font-size: 16px;
    color: var(--light-text);
    margin: 0;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 10px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }
    
    .hero-text h2 {
        font-size: 36px;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .advantage-item,
    .advantage-item.reverse {
        flex-direction: column;
        text-align: center;
    }
    
    .nav-links {
        display: none;
    }
}

@media (max-width: 768px) {
    .navbar .container {
        flex-wrap: wrap;
        gap: 15px;
        justify-content: center;
    }
    
    .hero {
        padding: 150px 0 100px;
    }
    
    .hero-text h2 {
        font-size: 28px;
    }
    
    .hero-text p {
        font-size: 16px;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn.downlbtnvmmn.platform {
        width: 280px;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero-text h2 {
        font-size: 24px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        gap: 20px;
    }
    
    .stat-item .number {
        font-size: 24px;
    }
    
    .section-header h2 {
        font-size: 24px;
    }
    
    .features,
    .advantages,
    .testimonials,
    .download-section,
    .faq-content,
    .contact-content {
        padding: 80px 0;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .social-icons {
        justify-content: center;
    }
}