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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 标题样式 */
h1, h2, h3 {
    color: #2c3e50;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    font-weight: 600;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* 段落样式 */
p {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background-color: #3498db;
    color: #fff;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background-color: #27ae60;
    color: #fff;
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.3);
}

.btn-secondary:hover {
    background-color: #229954;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(39, 174, 96, 0.4);
}

/* 导航栏样式 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    color: #2c3e50;
    transition: color 0.3s ease;
}

.logo-link:hover {
    color: #3498db;
}

.logo {
    height: 50px;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 30px;
}

.navbar-nav a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 600;
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

.navbar-nav a:hover {
    color: #3498db;
}

/* 英雄区域样式 */
.hero {
    background-color: #eaf2f8;
    padding: 120px 0 80px;
    margin-top: 80px;
}

.hero .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 50px;
}

.hero-content {
    flex: 1;
    animation: fadeInLeft 1s ease;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 15px;
    text-align: left;
    color: #2c3e50;
}

.hero-content h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #3498db;
}

.hero-content .subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #555;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    animation: fadeInRight 1s ease;
}

.hero-logo {
    width: 400px;
}

/* 动画效果 */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 功能介绍样式 */
.intro {
    padding: 80px 0;
    background-color: #fff;
}

.intro-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.intro-content p {
    font-size: 1.2rem;
    margin-bottom: 25px;
    color: #555;
}

/* 关键特性样式 */
.features {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    animation: fadeInUp 0.6s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: #3498db;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.feature-card:nth-child(1) .feature-icon {
    background-color: #f39c12;
}

.feature-card:nth-child(2) .feature-icon {
    background-color: #e74c3c;
}

.feature-card:nth-child(3) .feature-icon {
    background-color: #27ae60;
}

.feature-card:nth-child(4) .feature-icon {
    background-color: #9b59b6;
}

.feature-card:nth-child(5) .feature-icon {
    background-color: #1abc9c;
}

.feature-card:nth-child(6) .feature-icon {
    background-color: #34495e;
}

/* 适合人群样式 */
.use-cases {
    padding: 80px 0;
    background-color: #fff;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.use-case {
    text-align: center;
    padding: 30px;
    background-color: #f8f9fa;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.use-case:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.use-case-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: #3498db;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    margin: 0 auto 20px;
}

.use-case:nth-child(1) .use-case-icon {
    background-color: #3498db;
}

.use-case:nth-child(2) .use-case-icon {
    background-color: #27ae60;
}

.use-case:nth-child(3) .use-case-icon {
    background-color: #e74c3c;
}

/* 使用方法样式 */
.how-it-works {
    padding: 80px 0;
    background-color: #eaf2f8;
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 50px;
}

.step {
    flex: 1;
    min-width: 150px;
    text-align: center;
    background-color: #fff;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #3498db;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 15px;
}

.step-arrow {
    font-size: 2rem;
    color: #3498db;
    margin: 0 10px;
    display: none;
}

@media (min-width: 768px) {
    .step-arrow {
        display: block;
    }
}

/* 隐私保障样式 */
.privacy {
    padding: 80px 0;
    background-color: #fff;
}

.privacy-content {
    display: flex;
    align-items: center;
    gap: 40px;
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.privacy-icon {
    font-size: 4rem;
    color: #3498db;
    flex-shrink: 0;
}

.privacy-text h2 {
    text-align: left;
    margin-bottom: 15px;
}

/* 下载区域样式 */
.download {
    padding: 80px 0;
    background-color: #2c3e50;
    color: #fff;
}

.download h2 {
    color: #fff;
}

.download-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 50px;
    margin-top: 50px;
}

.download-info {
    flex: 1;
}

.download-info p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    color: #ecf0f1;
}

.screenshots {
    flex: 1;
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 20px 0;
}

.screenshot-item {
    flex: 0 0 auto;
    width: 250px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.screenshot-item:hover {
    transform: scale(1.05);
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}

/* 页脚样式 */
.footer {
    background-color: #34495e;
    color: #ecf0f1;
    padding: 40px 0;
    text-align: center;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.disclaimer {
    font-size: 0.9rem;
    margin-bottom: 15px;
    opacity: 0.8;
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 内容说明页面样式 */
.content-page {
    padding: 120px 0 80px;
    background-color: #fff;
}

.content-content {
    max-width: 1000px;
    margin: 0 auto;
}

.content-section {
    margin-bottom: 50px;
    background-color: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.content-item {
    background-color: #fff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    text-align: center;
}

.content-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.content-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #3498db;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    margin: 0 auto 15px;
}

.format-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.format-item {
    background-color: #fff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.format-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.requirements-list {
    list-style: none;
    margin-top: 20px;
}

.requirements-list li {
    padding: 10px 0;
    font-size: 1.1rem;
    color: #555;
}

.requirements-list li i {
    color: #27ae60;
    margin-right: 10px;
}

/* 支持信息页面样式 */
.support-page {
    padding: 120px 0 80px;
    background-color: #fff;
}

.support-content {
    max-width: 1000px;
    margin: 0 auto;
}

.faq-list {
    margin-top: 30px;
}

.faq-item {
    margin-bottom: 20px;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    background-color: #f8f9fa;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background-color: #e9ecef;
}

.faq-question h4 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
}

.faq-question i {
    font-size: 1rem;
    color: #3498db;
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    background-color: #fff;
}

.faq-answer.active {
    padding: 20px;
    max-height: 500px;
}

.troubleshooting-list {
    margin-top: 30px;
}

.troubleshooting-item {
    margin-bottom: 30px;
    padding: 25px;
    background-color: #f8f9fa;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.troubleshooting-item h4 {
    margin-bottom: 15px;
    color: #2c3e50;
    font-size: 1.2rem;
}

.contact-info {
    margin-top: 30px;
    text-align: center;
}

.contact-details {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
}

.contact-item i {
    color: #3498db;
    font-size: 1.3rem;
}

.contact-item a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: #2980b9;
    text-decoration: underline;
}

.terms-content {
    margin-top: 30px;
    text-align: center;
}

.terms-links {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-outline {
    background-color: transparent;
    color: #3498db;
    border: 2px solid #3498db;
}

.btn-outline:hover {
    background-color: #3498db;
    color: #fff;
}

/* 服务条款页面样式 */
.terms-page {
    padding: 120px 0 80px;
    background-color: #fff;
}

.terms-content {
    max-width: 1000px;
    margin: 0 auto;
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: block !important;
    flex-direction: column !important;
    grid-template-columns: none !important;
}

.terms-section {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e0e0e0;
    display: block !important;
}

.terms-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.terms-section h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.terms-section ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.terms-section li {
    margin-bottom: 10px;
    font-size: 1.1rem;
    color: #555;
}

.terms-section strong {
    color: #2c3e50;
    font-weight: 600;
}

/* 隐私政策页面样式 */
.privacy-page {
    padding: 120px 0 80px;
    background-color: #fff;
}

.privacy-content {
    max-width: 1000px;
    margin: 0 auto;
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: block !important;
    flex-direction: column !important;
    grid-template-columns: none !important;
}

.privacy-section {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e0e0e0;
    display: block !important;
}

.privacy-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.privacy-section h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.privacy-section ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.privacy-section li {
    margin-bottom: 10px;
    font-size: 1.1rem;
    color: #555;
}

.privacy-section strong {
    color: #2c3e50;
    font-weight: 600;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content h2 {
        text-align: center;
    }
    
    .download-content {
        flex-direction: column;
        text-align: center;
    }
    
    /* .privacy-content is not a flex container, so removing this rule */
    
    .privacy-text h2 {
        text-align: center;
    }
}

@media (max-width: 768px) {
    h2 {
        font-size: 2rem;
    }
    
    .hero-content h2 {
        font-size: 2.2rem;
    }
    
    .hero-content h3 {
        font-size: 1.5rem;
    }
    
    .navbar-nav {
        gap: 15px;
    }
    
    .navbar-nav a {
        font-size: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
        margin: 10px 0;
    }
    
    .hero-logo {
        width: 200px;
        height: 200px;
    }
}

@media (max-width: 576px) {
    .navbar-brand h1 {
        font-size: 1.5rem;
    }
    
    .logo {
        width: 40px;
        height: 40px;
    }
    
    .navbar-nav {
        display: none;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-content h2 {
        font-size: 1.8rem;
    }
    
    .hero-content h3 {
        font-size: 1.3rem;
    }
    
    .hero-content .subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: 10px 25px;
        font-size: 1rem;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .screenshot-item {
        width: 200px;
    }
}