:root {
    --primary-color: #003366; /* Business Blue */
    --secondary-color: #6c757d; /* Grey */
    --accent-color: #0056b3;
    --light-bg: #f8f9fa;
    --text-color: #333;
}

body {
    font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text-color);
    line-height: 1.6;
}

/* Navbar */
.navbar-brand {
    font-weight: bold;
    color: var(--primary-color) !important;
    font-size: 1.5rem;
}

.nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color) !important;
}

/* Hero Carousel */
.carousel-item {
    height: 500px;
    background-color: #ddd;
    position: relative;
}

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

.carousel-caption {
    background: rgba(0, 0, 0, 0.5);
    padding: 20px;
    border-radius: 5px;
}

/* Sections */
.section-padding {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    color: var(--primary-color);
    position: relative;
}

.section-title::after {
    content: "";
    display: block;
    width: 50px;
    height: 3px;
    background: var(--accent-color);
    margin: 15px auto 0;
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    height: 100%;
}

.card:hover {
    transform: translateY(-5px);
}

.card-img-top {
    height: 200px;
    object-fit: cover;
}

/* Timeline (About Us) */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: var(--primary-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
}

.timeline-container {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-container::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    right: -17px;
    background-color: white;
    border: 4px solid var(--accent-color);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.left {
    left: 0;
}

.right {
    left: 50%;
}

.left::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    right: 30px;
    border: medium solid white;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent white;
}

.right::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    left: 30px;
    border: medium solid white;
    border-width: 10px 10px 10px 0;
    border-color: transparent white transparent transparent;
}

.right::after {
    left: -16px;
}

.timeline-content {
    padding: 20px 30px;
    background-color: white;
    position: relative;
    border-radius: 6px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

@media screen and (max-width: 600px) {
    .timeline::after {
        left: 31px;
    }
    .timeline-container {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    .timeline-container::after {
        left: 15px;
    }
    .left::after, .right::after {
        left: 15px;
    }
    .right {
        left: 0%;
    }
}

/* Footer */
footer {
    background-color: #343a40;
    color: white;
    padding: 30px 0;
    text-align: center;
}

footer a {
    color: #adb5bd;
    text-decoration: none;
}

footer a:hover {
    color: white;
}