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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

/* 导航栏 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: #3498db;
}

.navbar-brand img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.navbar-menu {
    display: flex;
    gap: 30px;
}

.navbar-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.navbar-buttons .btn-primary {
    text-decoration: none;
}

/* 按钮样式 */
.btn-primary {
    display: inline-block;
    background-color: #3498db;
    color: #fff;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.btn-secondary {
    display: inline-block;
    background-color: transparent;
    color: #3498db;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid #3498db;
    text-decoration: none;
}

.btn-secondary:hover {
    background-color: #3498db;
    color: #fff;
    transform: translateY(-2px);
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 120px 0 80px;
    margin-top: 70px;
}

.hero .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.hero-content {
    flex: 1;
    max-width: 500px;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

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

.hero-image img {
    width: 300px;
    height: 300px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

/* 功能区域 */
.features {
    padding: 100px 0;
    background-color: #fff;
}

.features h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

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

.feature-item {
    background-color: #f9f9f9;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.feature-item p {
    color: #666;
}

/* 下载区域 */
.download {
    padding: 100px 0;
    background-color: #f5f5f5;
    text-align: center;
}

.download h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #333;
}

.download p {
    font-size: 18px;
    margin-bottom: 10px;
    color: #666;
}

.download .system-info {
    font-size: 16px;
    margin-bottom: 40px;
    color: #3498db;
    font-weight: 500;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    background-color: #fff;
    padding: 15px 30px;
    border-radius: 10px;
    text-decoration: none;
    color: #333;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.download-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.btn-icon {
    font-size: 32px;
}

.btn-text small {
    display: block;
    font-size: 12px;
    color: #666;
}

.btn-text span {
    font-size: 18px;
    font-weight: 500;
}

/* 用户评价 */
.testimonials {
    padding: 100px 0;
    background-color: #fff;
}

.testimonials h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

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

.testimonial-item {
    background-color: #f9f9f9;
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

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

.testimonial-avatar {
    font-size: 48px;
    margin-bottom: 20px;
}

.testimonial-content p {
    margin-bottom: 20px;
    color: #666;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.author-name {
    font-weight: 500;
    color: #333;
}

.author-rating {
    color: #f39c12;
}

/* 常见问题 */
.faq {
    padding: 100px 0;
    background-color: #f5f5f5;
}

.faq h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

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

.faq-item {
    background-color: #fff;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

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

.faq-question:hover {
    background-color: #f9f9f9;
}

.faq-question span {
    font-weight: 500;
    color: #333;
}

.faq-toggle {
    background: none;
    border: none;
    font-size: 24px;
    color: #3498db;
    cursor: pointer;
    transition: transform 0.3s ease;
}

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

.faq-answer {
    padding: 0 20px 20px;
    display: none;
    animation: fadeIn 0.3s ease;
}

.faq-answer p {
    color: #666;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background-color: #fff;
}

.contact h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.contact-content {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

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

.contact-info p {
    margin-bottom: 30px;
    color: #666;
    font-size: 18px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

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

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

.contact-icon {
    font-size: 24px;
    color: #3498db;
}

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

.qrcode-section {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.qrcode-item {
    text-align: center;
    max-width: 200px;
}

.qrcode-item img {
    width: 150px;
    height: 150px;
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.qrcode-item p {
    color: #333;
    font-weight: 500;
    margin: 0;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

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

/* 页脚 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: #fff;
}

.footer-brand img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

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

.footer-links a {
    text-decoration: none;
    color: #ddd;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #3498db;
}

.footer-social {
    display: flex;
    gap: 20px;
}

.footer-social a {
    text-decoration: none;
    color: #ddd;
    transition: color 0.3s ease;
}

.footer-social a:hover {
    color: #3498db;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    color: #aaa;
}

.footer-bottom p {
    margin-bottom: 5px;
}

.footer-bottom p:last-child {
    margin-bottom: 0;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar-menu {
        display: none;
    }

    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .hero-image img {
        width: 250px;
        height: 250px;
    }

    .features h2,
    .download h2,
    .testimonials h2,
    .faq h2,
    .contact h2 {
        font-size: 28px;
    }

    .contact-content {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 28px;
    }

    .hero-content p {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .download-btn {
        width: 200px;
        justify-content: center;
    }
}