/* 全局样式 */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #333;
    color: white;
    padding: 20px 0;
}

nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.logo a {
    color: white;
    text-decoration: none;
    font-size: 24px;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 20px;
}

.nav-links a {
    color: white;
    text-decoration: none;
}

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

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

.hero {
    background-image: url('https://via.placeholder.com/1920x1080');
    background-size: cover;
    background-position: center;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

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

.hero-content p {
    font-size: 20px;
    margin-bottom: 40px;
}

.cta-button {
    background-color: #ff6600;
    color: white;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 18px;
}

.advantages,
.features,
.applications {
    padding: 80px 0;
    text-align: center;
}

.advantages h2,
.features h2,
.applications h2 {
    font-size: 36px;
    margin-bottom: 40px;
}

.advantage-cards,
.feature-cards,
.application-cards {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.advantage-card,
.feature-card,
.application-card {
    width: 300px;
    margin: 20px;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.advantage-card img,
.feature-card img,
.application-card img {
    margin-bottom: 20px;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 20px 0;
}

footer ul {
    list-style: none;
    padding: 0;
}

footer ul li {
    display: inline;
    margin: 0 10px;
}

footer ul li a {
    color: white;
    text-decoration: none;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    body {
        overflow-x: hidden;
    }

    .nav-links {
        position: absolute;
        right: 0px;
        height: 92vh;
        top: 8vh;
        background-color: #333;
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
    }

    .nav-links li {
        opacity: 0;
    }

    .burger {
        display: block;
    }
}

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

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

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

.toggle .line2 {
    opacity: 0;
}

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