:root {
     --primary-blue: #1a6fc4;
     --secondary-blue: #2c8de0;
     --light-blue: #e6f2ff;
     --dark-blue: #0d4a82;
     --accent-blue: #4da8ff;
     --text-dark: #333;
     --text-light: #f8f9fa;
 }

body {
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: #f9fbfd;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 0.8rem 0;
    transition: all 0.3s;
}

.navbar-brand {
    font-weight: bold;
    color: white !important;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
}

.navbar-brand i {
    margin-right: 8px;
    font-size: 1.8rem;
}

.navbar-nav .nav-link {
    color: rgba(255,255,255,0.85) !important;
    font-weight: 500;
    transition: color 0.3s;
    padding: 0.5rem 1rem;
    margin: 0 3px;
    border-radius: 4px;
}

.navbar-nav .nav-link:hover {
    color: #fff !important;
    background-color: rgba(255,255,255,0.1);
}

.navbar-nav .active > .nav-link {
    color: #fff !important;
    background-color: rgba(255,255,255,0.15);
}

/* 轮播图样式 */
.carousel-item {
    height: 500px;
    background-position: center;
    background-size: cover;
}

.carousel-caption {
    background: linear-gradient(to right, rgba(13, 74, 130, 0.85), rgba(26, 111, 196, 0.7));
    border-radius: 8px;
    padding: 30px;
    bottom: 80px;
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
    left: 10%;
    right: 10%;
}

.carousel-caption h3 {
    font-size: 2.2rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.carousel-caption p {
    font-size: 1.2rem;
    margin-bottom: 0;
}

.carousel-control-prev, .carousel-control-next {
    width: 5%;
    opacity: 0.8;
}

.carousel-indicators li {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.5);
    border: 2px solid transparent;
}

.carousel-indicators .active {
    background-color: white;
    border-color: var(--primary-blue);
}

/* 内容区域样式 */
.content-section {
    padding: 80px 0;
}

.section-title {
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 40px;
    text-align: center;
    font-weight: bold;
    color: var(--dark-blue);
    font-size: 2rem;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-blue), var(--accent-blue));
    border-radius: 2px;
}

.company-logo {
    max-width: 140px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border: 3px solid white;
}

.company-intro {
    background-color: white;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    border-left: 5px solid var(--primary-blue);
}

.company-intro h2 {
    color: var(--primary-blue);
    margin-bottom: 25px;
    font-weight: bold;
}

.company-intro p {
    margin-bottom: 25px;
    text-align: justify;
    font-size: 1.05rem;
}

.highlight {
    font-weight: 600;
    color: var(--dark-blue);
    background-color: var(--light-blue);
    padding: 2px 6px;
    border-radius: 3px;
}

/* 产品特色区域 */
.features {
    background-color: var(--light-blue);
    padding: 80px 0;
}

.feature-card {
    background: white;
    border-radius: 8px;
    padding: 30px 20px;
    text-align: center;
    height: 100%;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 4px solid var(--primary-blue);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 20px;
}

.feature-card h4 {
    color: var(--dark-blue);
    margin-bottom: 15px;
    font-weight: 600;
}

/* 页脚样式 */
.footer {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
    color: white;
    padding: 60px 0 20px;
}

.footer h5 {
    color: white;
    margin-bottom: 20px;
    font-weight: 600;
}

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

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

.footer ul li a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s;
}

.footer ul li a:hover {
    color: white;
    text-decoration: underline;
}

.footer .copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: 30px;
    color: rgba(255,255,255,0.7);
}

.social-icons a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50%;
    text-align: center;
    line-height: 40px;
    margin-right: 10px;
    color: white;
    transition: all 0.3s;
}

.social-icons a:hover {
    background-color: var(--accent-blue);
    transform: translateY(-3px);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .carousel-item {
        height: 400px;
    }

    .carousel-caption {
        bottom: 40px;
        padding: 20px;
        left: 5%;
        right: 5%;
    }

    .carousel-caption h3 {
        font-size: 1.8rem;
    }

    .carousel-caption p {
        font-size: 1rem;
    }

    .content-section {
        padding: 60px 0;
    }

    .company-intro {
        padding: 25px;
    }

    .section-title {
        font-size: 1.8rem;
    }
}

@media (max-width: 576px) {
    .carousel-item {
        height: 300px;
    }

    .carousel-caption {
        bottom: 20px;
        padding: 15px;
    }

    .carousel-caption h3 {
        font-size: 1.5rem;
    }

    .navbar-brand {
        font-size: 1.3rem;
    }

    .content-section {
        padding: 40px 0;
    }

    .company-intro {
        padding: 20px;
    }
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-blue);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 50px;
    font-size: 1.2rem;
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
    cursor: pointer;
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
}

.back-to-top.show {
    opacity: 1;
}

.back-to-top:hover {
    background-color: var(--dark-blue);
    transform: translateY(-3px);
}


.brand-logo {
    height: 35px;
    margin-right: 10px;
    margin-left: 10px;
}