body {
    font-family: "Microsoft YaHei", Arial, sans-serif;
    padding-top: 70px;
}

.carousel-inner > .item > img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.about-section, .products-section, .advantages-section {
    padding: 80px 0;
}

.about-section {
    background-color: #f8f9fa;
}

.products-section {
    background-color: #ffffff;
}

.advantages-section {
    background-color: #e9ecef;
}

hr.star-light,
hr.star-primary {
    padding: 0;
    border: none;
    border-top: solid 5px;
    text-align: center;
    max-width: 250px;
    margin: 25px auto 30px;
}

hr.star-light {
    border-color: #fff;
}

hr.star-primary {
    border-color: #2c3e50;
}

.advantage-item {
    padding: 20px;
}

.advantage-icon {
    font-size: 48px;
    margin-bottom: 20px;
    color: #007bff;
}

.footer {
    background-color: #2c3e50;
    color: white;
    padding: 50px 0;
}

.footer a {
    color: #fff;
}

.footer a:hover {
    color: #007bff;
    text-decoration: none;
}

.thumbnail {
    border: none;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.thumbnail:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.thumbnail img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-size: 24px;
    font-weight: bold;
}

.navbar-default .navbar-nav > li > a {
    color: #333;
    font-size: 16px;
}

.navbar-default .navbar-nav > li > a:hover {
    color: #007bff;
}

.navbar-default .navbar-nav > .active > a,
.navbar-default .navbar-nav > .active > a:hover,
.navbar-default .navbar-nav > .active > a:focus {
    color: #007bff;
    background-color: #fff;
}