/* Basic Reset & Body Styles */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --dark-bg: #343a40;
    --border-color: #dee2e6;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

ul {
    list-style: none;
}

/* Header Styles */
.main-header {
    background-color: #fff;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0,0,0,.05);
}

.header-top-bar {
    background-color: var(--light-bg);
    padding: 8px 0;
    font-size: 0.85em;
    color: #666;
    border-bottom: 1px solid var(--border-color);
}

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

.header-top-bar .top-nav ul {
    display: flex;
    gap: 15px;
}

.header-main-section {
    padding: 15px 0;
}

.logo-and-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.site-logo {
    display: flex;
    align-items: center;
    font-size: 1.8em;
    font-weight: bold;
    color: var(--dark-bg);
}

.site-logo img {
    margin-right: 10px;
    height: 40px; /* Adjusted height for better display */
    width: auto;
}

.primary-nav .nav-links {
    display: flex;
    gap: 25px;
}

.primary-nav .nav-links > li {
    position: relative;
}

.primary-nav .nav-links > li > a {
    display: block;
    padding: 10px 0;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.primary-nav .nav-links > li > a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.submenu {
    display: none;
    position: absolute;
    background-color: #fff;
    box-shadow: 0 4px 8px rgba(0,0,0,.1);
    border: 1px solid var(--border-color);
    padding: 10px 0;
    min-width: 180px;
    z-index: 100;
    left: 0;
    top: 100%;
}

.primary-nav .nav-links > li:hover .submenu {
    display: block;
}

.submenu li a {
    padding: 8px 15px;
    display: block;
    color: var(--text-color);
}

.submenu li a:hover {
    background-color: var(--light-bg);
    color: var(--primary-color);
}

.menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    padding: 5px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.search-form {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.search-form input[type="search"] {
    border: none;
    padding: 8px 12px;
    outline: none;
    flex-grow: 1;
}

.search-form button {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: 8px 12px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.btn {
    padding: 8px 15px;
    border-radius: 4px;
    text-align: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
    border: 1px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
    text-decoration: none;
}

.btn-secondary {
    background-color: #fff;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--light-bg);
    color: #0056b3;
    border-color: #0056b3;
    text-decoration: none;
}

/* Footer Styles */
.main-footer {
    background-color: var(--dark-bg);
    color: #f8f9fa;
    padding: 40px 0 20px;
    font-size: 0.9em;
}

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

.main-footer a:hover {
    color: #fff;
    text-decoration: underline;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-col h3 {
    color: #fff;
    font-size: 1.1em;
    margin-bottom: 15px;
}

.footer-col p, .footer-col address {
    margin-bottom: 10px;
}

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

.social-icons {
    display: flex;
    gap: 15px;
    margin-top: 15px;
    margin-bottom: 20px;
}

.social-icons a {
    color: #fff;
    font-size: 1.5em;
    transition: color 0.3s ease;
}

.social-icons a:hover {
    color: var(--primary-color);
}

.newsletter-signup h4 {
    color: #fff;
    margin-bottom: 10px;
}

.newsletter-signup form {
    display: flex;
}

.newsletter-signup input[type="email"] {
    border: 1px solid #6c757d;
    padding: 8px 12px;
    border-radius: 4px 0 0 4px;
    outline: none;
    flex-grow: 1;
    background-color: #495057;
    color: #fff;
}

.newsletter-signup input[type="email"]::placeholder {
    color: #adb5bd;
}

.newsletter-signup .btn-subscribe {
    background-color: var(--primary-color);
    color: #fff;
    border: 1px solid var(--primary-color);
    padding: 8px 15px;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.newsletter-signup .btn-subscribe:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

.footer-bottom {
    border-top: 1px solid #495057;
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.footer-bottom .copyright {
    margin: 0;
    color: #adb5bd;
}

.footer-legal-nav ul {
    display: flex;
    gap: 20px;
}

/* Responsive adjustments */
@media (max-width: 992px) {
    .primary-nav .nav-links {
        gap: 15px;
    }
    .header-actions {
        gap: 10px;
    }
    .site-logo {
        font-size: 1.5em;
    }
}

@media (max-width: 768px) {
    .header-top-bar .top-bar-content {
        flex-direction: column;
        text-align: center;
        gap: 5px;
    }
    .header-top-bar .top-nav ul {
        justify-content: center;
    }
    .logo-and-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    .primary-nav {
        width: 100%;
    }
    .primary-nav .nav-links {
        flex-direction: column;
        width: 100%;
        display: none; /* Hidden by default for mobile */
        border-top: 1px solid var(--border-color);
        padding-top: 10px;
    }
    .primary-nav .nav-links.active {
        display: flex;
    }
    .primary-nav .nav-links > li {
        width: 100%;
    }
    .primary-nav .nav-links > li > a {
        padding: 10px 15px;
        border-bottom: 1px solid var(--light-bg);
    }
    .submenu {
        position: static;
        box-shadow: none;
        border: none;
        padding: 0 0 0 20px;
        min-width: unset;
        background-color: var(--light-bg);
    }
    .submenu li a {
        padding: 8px 10px;
    }
    .menu-toggle {
        display: block; /* Show on mobile */
        order: 1; /* Place it before logo for better access */
        align-self: flex-end;
    }
    .site-logo {
        order: 2;
        margin-right: auto; /* Push logo to left */
    }
    .header-actions {
        width: 100%;
        justify-content: center;
        order: 3;
        margin-top: 10px;
    }
    .search-form {
        width: 100%;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-col ul {
        padding: 0;
    }
    .footer-col ul li {
        display: inline-block; /* For better mobile presentation of links */
        margin: 0 10px 8px 0;
    }
    .social-icons {
        justify-content: center;
    }
    .newsletter-signup form {
        max-width: 300px;
        margin: 0 auto;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .footer-legal-nav ul {
        flex-direction: column;
        gap: 5px;
    }
}
/* 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;
  }
}