/* General Body Styles */
body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f7f6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.main-header {
    background-color: #ffffff;
    border-bottom: 1px solid #e0e0e0;
    padding: 15px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    position: relative;
    z-index: 1000;
}

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

.main-header .branding {
    display: flex;
    align-items: center;
}

.main-header .logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #333;
}

.main-header .logo img {
    margin-right: 10px;
}

.main-header .logo h1 {
    font-size: 24px;
    margin: 0;
    color: #0056b3;
}

.main-nav .nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

.main-nav .nav-item {
    margin-left: 25px;
    position: relative;
}

.main-nav .nav-link {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    padding: 10px 0;
    display: block;
    transition: color 0.3s ease;
}

.main-nav .nav-link:hover,
.main-nav .nav-link:focus {
    color: #007bff;
}

.main-nav .dropdown-menu {
    display: none;
    position: absolute;
    background-color: #ffffff;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    min-width: 160px;
    z-index: 1;
    list-style: none;
    padding: 10px 0;
    border-radius: 4px;
    top: 100%;
    left: 0;
}

.main-nav .nav-item.dropdown:hover .dropdown-menu {
    display: block;
}

.main-nav .dropdown-menu li a {
    color: #333;
    padding: 10px 20px;
    text-decoration: none;
    display: block;
    white-space: nowrap;
    transition: background-color 0.3s ease;
}

.main-nav .dropdown-menu li a:hover {
    background-color: #f1f1f1;
    color: #007bff;
}

.main-nav .menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 5px;
}

.search-bar {
    margin-left: 20px;
}

.search-bar form {
    display: flex;
    border: 1px solid #ccc;
    border-radius: 20px;
    overflow: hidden;
}

.search-bar input[type="search"] {
    border: none;
    padding: 8px 15px;
    outline: none;
    flex-grow: 1;
    font-size: 14px;
}

.search-bar button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 8px 15px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s ease;
}

.search-bar button:hover {
    background-color: #0056b3;
}

.announcement-bar {
    background-color: #ffc107;
    color: #333;
    text-align: center;
    padding: 10px 0;
    font-size: 15px;
}

.announcement-bar a {
    color: #0056b3;
    font-weight: bold;
    text-decoration: none;
}

.announcement-bar a:hover {
    text-decoration: underline;
}

.sub-header-info {
    background-color: #e9ecef;
    padding: 20px 0;
    text-align: center;
    color: #495057;
    font-size: 14px;
}

.sub-header-info ul {
    list-style: none;
    padding: 0;
    margin: 10px 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* Footer Styles */
.main-footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 40px 0 20px;
    font-size: 14px;
}

.main-footer .footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.main-footer h3 {
    color: #ffffff;
    font-size: 18px;
    margin-bottom: 15px;
    border-bottom: 2px solid #3498db;
    padding-bottom: 5px;
    display: inline-block;
}

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

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

.main-footer ul li {
    margin-bottom: 8px;
}

.main-footer ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.main-footer ul li a:hover {
    color: #3498db;
    text-decoration: underline;
}

.main-footer address {
    font-style: normal;
    margin-bottom: 10px;
}

.main-footer .newsletter-form {
    display: flex;
    margin-top: 15px;
}

.main-footer .newsletter-form input[type="email"] {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #555;
    border-radius: 4px 0 0 4px;
    outline: none;
    background-color: #34495e;
    color: #ecf0f1;
}

.main-footer .newsletter-form button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.main-footer .newsletter-form button:hover {
    background-color: #2980b9;
}

.main-footer .social-media {
    margin-top: 20px;
    display: flex;
    gap: 15px;
}

.main-footer .social-media a {
    color: #ecf0f1;
    font-size: 20px;
    transition: color 0.3s ease;
}

.main-footer .social-media a:hover {
    color: #3498db;
}

.main-footer .footer-bottom {
    text-align: center;
    border-top: 1px solid #34495e;
    padding-top: 20px;
    margin-top: 20px;
}

.main-footer .footer-bottom p {
    margin: 5px 0;
    color: #bdc3c7;
}

.main-footer .footer-bottom .footer-note {
    font-size: 13px;
    opacity: 0.8;
}

/* Utility Classes & Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.btn-primary {
    background-color: #007bff;
    color: white;
    border: 1px solid #007bff;
}

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

.btn-secondary {
    background-color: #6c757d;
    color: white;
    border: 1px solid #6c757d;
}

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #545b62;
}

/* Responsive Adjustments */
@media (max-width: 992px) {
    .main-nav .nav-list {
        display: none; /* Hide main menu by default on smaller screens */
        flex-direction: column;
        width: 100%;
        background-color: #ffffff;
        position: absolute;
        top: 100%;
        left: 0;
        box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    }

    .main-nav .nav-list.active {
        display: flex; /* Show when active */
    }

    .main-nav .nav-item {
        margin: 0;
        border-bottom: 1px solid #eee;
    }

    .main-nav .nav-link {
        padding: 15px 20px;
    }

    .main-nav .dropdown-menu {
        position: static;
        box-shadow: none;
        border-top: 1px solid #eee;
        padding-left: 20px;
    }

    .main-nav .menu-toggle {
        display: block; /* Show toggle button */
    }

    .main-header .container {
        flex-wrap: nowrap;
    }

    .search-bar {
        order: 3; /* Move search below nav on smaller screens */
        flex-basis: 100%;
        margin-top: 15px;
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .main-footer .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .main-footer h3 {
        border-bottom: none;
        padding-bottom: 0;
        margin-bottom: 10px;
    }

    .main-footer .social-media {
        justify-content: center;
    }
}
/* 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;
  }
}