/* General Body Styles */
body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    margin: 0;
    padding: 0;
    background-color: #f8f9fa;
}

/* Container for responsive design */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
.main-header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1020;
}

.header-top-bar {
    background-color: #007bff;
    color: #fff;
    padding: 8px 0;
    font-size: 0.9em;
}

.header-top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-top-bar .contact-info span {
    margin-right: 20px;
    white-space: nowrap;
}

.header-top-bar .social-links a {
    color: #fff;
    margin-left: 15px;
    transition: color 0.3s ease;
}

.header-top-bar .social-links a:hover {
    color: #e9ecef;
}

.navbar-brand {
    display: flex;
    align-items: center;
}

.navbar-brand .logo-img {
    height: 40px;
    margin-right: 10px;
    vertical-align: middle;
}

.navbar-brand .brand-name {
    font-size: 1.5em;
    font-weight: bold;
    color: #333;
    vertical-align: middle;
}

.navbar-nav .nav-item .nav-link {
    font-weight: 500;
    color: #555;
    padding: 10px 15px;
    transition: color 0.3s ease, background-color 0.3s ease;
}

.navbar-nav .nav-item .nav-link:hover,
.navbar-nav .nav-item.active .nav-link {
    color: #007bff;
    background-color: #f0f8ff;
    border-radius: 5px;
}

.navbar-nav .dropdown-menu {
    border: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.3s ease-out;
}

.navbar-nav .dropdown-item {
    padding: 10px 20px;
    transition: background-color 0.2s ease;
}

.navbar-nav .dropdown-item:hover {
    background-color: #e9ecef;
    color: #007bff;
}

.contact-btn {
    margin-left: 20px;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: bold;
    background-color: #28a745;
    border-color: #28a745;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.contact-btn:hover {
    background-color: #218838;
    border-color: #1e7e34;
}

/* Footer Styles */
.main-footer {
    background-color: #343a40 !important; /* Ensure dark background */
    color: #f8f9fa !important;
    padding-top: 50px;
    padding-bottom: 30px;
    margin-top: 50px;
}

.main-footer h5 {
    color: #fff;
    margin-bottom: 25px;
    font-weight: bold;
    position: relative;
}

.main-footer h5::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 50px;
    height: 3px;
    background-color: #007bff;
}

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

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

.main-footer ul li a,
.main-footer ul li {
    color: #adb5bd;
    text-decoration: none;
    transition: color 0.3s ease;
}

.main-footer ul li a:hover {
    color: #fff;
}

.footer-social-links a {
    color: #adb5bd;
    margin-right: 15px;
    font-size: 1.2em;
    transition: color 0.3s ease;
}

.footer-social-links a:hover {
    color: #fff;
}

.newsletter-form .form-control {
    border-radius: 0.25rem 0 0 0.25rem;
    border: 1px solid #ced4da;
    background-color: #fefefe;
    color: #333;
}

.newsletter-form .btn-primary {
    border-radius: 0 0.25rem 0.25rem 0;
    background-color: #007bff;
    border-color: #007bff;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.newsletter-form .btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

.main-footer .text-white-50 {
    color: rgba(255, 255, 255, 0.65) !important;
}

.main-footer .bg-secondary {
    background-color: #6c757d !important;
}

/* Keyframe Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive adjustments */
@media (max-width: 991.98px) {
    .navbar-collapse {
        background-color: #fff;
        padding: 15px;
        border-top: 1px solid #eee;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }
    .navbar-nav .nav-item {
        margin-bottom: 10px;
    }
    .contact-btn {
        margin-left: 0;
        width: 100%;
        text-align: center;
        margin-top: 10px;
    }
    .header-top-bar .container {
        flex-direction: column;
        align-items: flex-start;
    }
    .header-top-bar .contact-info {
        margin-bottom: 10px;
    }
    .header-top-bar .social-links {
        width: 100%;
        text-align: center;
        margin-top: 10px;
    }
    .header-top-bar .social-links a {
        margin: 0 10px;
    }
    .main-footer h5::after {
        left: 50%;
        transform: translateX(-50%);
    }
}

@media (max-width: 767.98px) {
    .footer-col {
        text-align: center;
    }
    .footer-social-links {
        justify-content: center;
        display: flex;
    }
    .main-footer ul {
        display: inline-block; /* To center the list items */
        text-align: left;
    }
    .newsletter-form .input-group {
        max-width: 300px;
        margin: 0 auto;
    }
    .navbar-brand .brand-name {
        font-size: 1.3em;
    }
    .navbar-brand .logo-img {
        height: 35px;
    }
}
/* 移动端内容区防溢出（系统追加，请勿删除） */
@media (max-width: 768px) {
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}