/* Shared CSS for Header and Footer */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --text-color: #333;
    --bg-color: #fff;
    --border-color: #ddd;
}

body {
    margin: 0;
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

/* Header Styles */
.site-header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.site-header .logo img {
    height: 50px;
}

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

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

.main-navigation ul li a {
    text-decoration: none;
    color: var(--text-color);
    padding: 10px 0;
    display: block;
    transition: color 0.3s ease;
}

.main-navigation ul li a:hover,
.main-navigation ul li.current-menu-item a {
    color: var(--primary-color);
}

.main-navigation ul li.menu-item-has-children > a::after {
    content: '▼';
    font-size: 0.7em;
    margin-left: 5px;
}

.main-navigation .sub-menu {
    display: none;
    position: absolute;
    background-color: var(--bg-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    min-width: 180px;
    top: 100%;
    left: 0;
    padding: 10px 0;
    border-radius: 4px;
}

.main-navigation ul li.menu-item-has-children:hover > .sub-menu {
    display: block;
}

.main-navigation .sub-menu li {
    margin: 0;
}

.main-navigation .sub-menu li a {
    padding: 8px 20px;
    white-space: nowrap;
}

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

/* Footer Styles */
.site-footer {
    background-color: #222;
    color: #f8f8f8;
    padding: 40px 0;
    font-size: 0.9em;
}

.site-footer a {
    color: #f8f8f8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.site-footer a:hover {
    color: var(--primary-color);
}

.footer-widgets {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 30px;
}

.footer-widget {
    flex: 1;
    min-width: 200px;
    margin: 0 15px 20px 0;
}

.footer-widget:last-child {
    margin-right: 0;
}

.footer-widget h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.1em;
}

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

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

.social-links {
    display: flex;
    margin-top: 15px;
}

.social-links li {
    margin-right: 15px;
}

.social-links a {
    font-size: 1.2em;
}

.newsletter-form {
    display: flex;
    margin-top: 10px;
}

.newsletter-form input[type="email"] {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #555;
    background-color: #333;
    color: #fff;
    border-radius: 4px 0 0 4px;
}

.newsletter-form button {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    border-radius: 0 4px 4px 0;
    transition: background-color 0.3s ease;
}

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

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

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

/* Responsive Adjustments */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        align-items: flex-start;
    }
    .main-navigation {
        width: 100%;
        margin-top: 15px;
    }
    .main-navigation ul {
        flex-direction: column;
        width: 100%;
        display: none; /* Hidden by default for mobile */
    }
    .main-navigation ul.active {
        display: flex;
    }
    .main-navigation ul li {
        margin-left: 0;
        border-bottom: 1px solid #eee;
    }
    .main-navigation ul li:last-child {
        border-bottom: none;
    }
    .main-navigation .sub-menu {
        position: static;
        box-shadow: none;
        background-color: #f9f9f9;
        padding-left: 20px;
    }
    .menu-toggle {
        display: block; /* Show on mobile */
        align-self: flex-end;
    }
    .header-actions {
        width: 100%;
        text-align: center;
        margin-top: 15px;
    }
    .footer-widgets {
        flex-direction: column;
    }
    .footer-widget {
        margin-right: 0;
        margin-bottom: 30px;
        width: 100%;
    }
}

.button {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

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

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

.button.secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.button.secondary:hover {
    background-color: var(--primary-color);
    color: #fff;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}
/* 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;
  }
}