/* General Body Styles */
body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: #333;
    background-color: #f8f8f8;
}

/* Container for main content */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.main-header {
    background-color: #fff;
    border-bottom: 1px solid #eee;
    padding: 15px 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-header .logo img {
    height: 40px;
    vertical-align: middle;
}

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

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

.main-nav ul li a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    padding: 5px 0;
    display: block;
    transition: color 0.3s ease;
}

.main-nav ul li a:hover,
.main-nav ul li a:focus {
    color: #007bff;
}

.main-nav .has-dropdown > a::after {
    content: ' \25BC'; /* Unicode for a down arrow */
    font-size: 0.7em;
    margin-left: 5px;
}

.main-nav .dropdown-menu {
    display: none;
    position: absolute;
    background-color: #fff;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    min-width: 180px;
    z-index: 1000;
    list-style: none;
    padding: 10px 0;
    margin-top: 10px;
    border-radius: 4px;
}

.main-nav .has-dropdown:hover .dropdown-menu,
.main-nav .has-dropdown:focus-within .dropdown-menu {
    display: block;
}

.main-nav .dropdown-menu li {
    margin: 0;
}

.main-nav .dropdown-menu li a {
    padding: 10px 20px;
    color: #333;
    white-space: nowrap;
}

.main-nav .dropdown-menu li a:hover,
.main-nav .dropdown-menu li a:focus {
    background-color: #f5f5f5;
    color: #007bff;
}

.menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    color: #333;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
}

.header-actions .btn {
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 5px;
    margin-left: 10px;
    font-weight: 500;
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

.header-actions .btn-secondary {
    background-color: #f0f0f0;
    color: #333;
    border: 1px solid #ccc;
}

.header-actions .btn-secondary:hover {
    background-color: #e0e0e0;
}

.search-toggle {
    background: none;
    border: none;
    margin-left: 15px;
    cursor: pointer;
    font-size: 18px;
    color: #555;
    transition: color 0.3s ease;
}

.search-toggle:hover {
    color: #007bff;
}

/* Footer Styles */
.main-footer {
    background-color: #222;
    color: #bbb;
    padding: 40px 0 20px;
    font-size: 0.9em;
}

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

.main-footer h4 {
    color: #fff;
    margin-bottom: 15px;
    font-size: 1.1em;
}

.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,
.main-footer address a {
    color: #bbb;
    text-decoration: none;
    transition: color 0.3s ease;
}

.main-footer ul li a:hover,
.main-footer address a:hover {
    color: #007bff;
}

.main-footer .social-links a {
    color: #fff;
    font-size: 1.5em;
    margin-right: 15px;
    transition: color 0.3s ease;
}

.main-footer .social-links a:hover {
    color: #007bff;
}

.main-footer .footer-bottom {
    border-top: 1px solid #333;
    padding-top: 20px;
    text-align: center;
    color: #888;
}

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

.main-footer .footer-bottom a {
    color: #888;
    text-decoration: none;
}

.main-footer .footer-bottom a:hover {
    color: #007bff;
    text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .main-nav {
        order: 3;
        flex-basis: 100%;
        margin-top: 15px;
    }

    .main-nav .nav-list {
        flex-direction: column;
        display: none; /* Hidden by default for mobile */
        width: 100%;
        background-color: #fff;
        border-top: 1px solid #eee;
        box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    }

    .main-nav .nav-list.is-open {
        display: flex;
    }

    .main-nav ul li {
        margin: 0;
        border-bottom: 1px solid #f5f5f5;
    }

    .main-nav ul li:last-child {
        border-bottom: none;
    }

    .main-nav ul li a {
        padding: 12px 20px;
    }

    .main-nav .dropdown-menu {
        position: static;
        box-shadow: none;
        border-top: 1px solid #eee;
        padding-left: 20px;
        margin-top: 0;
    }

    .menu-toggle {
        display: block; /* Show on mobile */
    }

    .header-actions {
        margin-left: auto;
    }
}
/* 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;
  }
}