/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #2c3e50;
}

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

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 8vh;
    width: 90%;
    margin: auto;
    padding: 10px 0;
}

.logo img {
    height: 50px;
}

.nav-links {
    display: flex;
    justify-content: space-around;
    width: 40%;
}

.nav-links a {
    color: #2c3e50;
    font-weight: 500;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

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

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: #2c3e50;
    margin: 5px;
    transition: all 0.3s ease;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
    margin: 10px;
}

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

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

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

.secondary:hover {
    background-color: rgba(52, 152, 219, 0.1);
    transform: translateY(-2px);
}

/* 英雄区域 */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 100vh;
    padding: 100px 10%;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero-content {
    flex: 1;
    padding-right: 50px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 10px;
    color: #2c3e50;
}

.hero-content h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #3498db;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #7f8c8d;
    max-width: 600px;
}

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

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* 功能区域 */
.features {
    padding: 100px 10%;
    background-color: #fff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.features-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background-color: #fff;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #2c3e50;
}

.feature-card p {
    color: #7f8c8d;
}

/* 下载区域 */
.download {
    padding: 100px 10%;
    background: linear-gradient(135deg, #e0eafc 0%, #cfdef3 100%);
    text-align: center;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.download-description {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 40px;
    color: #34495e;
}

.download-options {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 40px;
}

.download-btn {
    display: flex;
    align-items: center;
    background-color: #2c3e50;
    color: white;
    padding: 15px 30px;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background-color: #1a252f;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.download-btn i {
    font-size: 2rem;
    margin-right: 15px;
}

.download-btn span {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.download-btn small {
    font-size: 0.8rem;
    opacity: 0.8;
}

.qr-code {
    margin-top: 40px;
}

.qr-code img {
    width: 200px;
    height: 200px;
    margin-bottom: 15px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 关于我们 */
.about {
    padding: 100px 10%;
    background-color: #fff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
    flex-grow: 1;
}

.about-text {
    flex: 1;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: #34495e;
}

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

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

.contact-item i {
    font-size: 1.2rem;
    color: #3498db;
    margin-right: 15px;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    border-radius: 15px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

/* 页脚 */
footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 60px 10% 20px;
}

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

.footer-logo img {
    height: 40px;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-column h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #3498db;
}

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

.footer-column ul li a {
    color: #bdc3c7;
    transition: all 0.3s ease;
}

.footer-column ul li a:hover {
    color: #3498db;
}

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

.social-media a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.social-media a:hover {
    background-color: #3498db;
    transform: translateY(-3px);
}

.social-media i {
    font-size: 1.2rem;
}

.footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #95a5a6;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media screen and (max-width: 1024px) {
    .nav-links {
        width: 60%;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 150px;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 50px;
    }
    
    .hero-content p {
        margin: 0 auto 30px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-text {
        margin-bottom: 40px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .footer-links {
        width: 100%;
        justify-content: space-between;
    }
}

@media screen and (max-width: 768px) {
    body {
        overflow-x: hidden;
    }
    
    .nav-links {
        position: absolute;
        right: 0;
        height: 92vh;
        top: 8vh;
        background-color: #fff;
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        box-shadow: -5px 0 10px rgba(0, 0, 0, 0.1);
    }
    
    .nav-links li {
        opacity: 0;
    }
    
    .burger {
        display: block;
    }
    
    .features-container {
        grid-template-columns: 1fr;
    }
    
    .download-options {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 30px;
    }
    
    .features, .download, .about {
        padding: 80px 5%;
    }
}

.nav-active {
    transform: translateX(0%);
}

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

.toggle .line1 {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.toggle .line2 {
    opacity: 0;
}

.toggle .line3 {
    transform: rotate(45deg) translate(-5px, -6px);
}