/* Basic Reset & Typography */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --info-color: #17a2b8;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --text-color: #333;
    --heading-color: #222;
    --bg-color: #fff;
    --border-color: #dee2e6;
    --font-family-sans-serif: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    --font-family-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

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

body {
    font-family: var(--font-family-sans-serif);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    text-decoration: underline;
}

ul {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--heading-color);
    margin-bottom: 0.5em;
    line-height: 1.2;
}

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

.btn {
    display: inline-block;
    font-weight: 400;
    color: #fff;
    text-align: center;
    vertical-align: middle;
    user-select: none;
    background-color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 0.25rem;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

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

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #0069d9;
    border-color: #0062cc;
}

.btn-hero {
    font-size: 1.25rem;
    padding: 1rem 2rem;
    background-color: var(--success-color);
    border-color: var(--success-color);
}

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

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

/* Header Specific Styles */
.site-header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.header-top-bar {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: 8px 0;
    font-size: 0.85rem;
}

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

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

.top-bar-nav a {
    color: var(--light-color);
    opacity: 0.8;
}

.top-bar-nav a:hover {
    opacity: 1;
    text-decoration: none;
}

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

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

.logo img {
    display: block;
    max-height: 50px;
    width: auto;
}

.main-navigation .nav-menu {
    display: flex;
    gap: 25px;
}

.main-navigation .nav-menu > .menu-item {
    position: relative;
}

.main-navigation .nav-menu > .menu-item > a {
    display: block;
    padding: 10px 0;
    color: var(--heading-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.main-navigation .nav-menu > .menu-item > a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.main-navigation .submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    min-width: 180px;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
}

.main-navigation .has-submenu:hover > .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.main-navigation .submenu li a {
    display: block;
    padding: 10px 15px;
    color: var(--text-color);
    white-space: nowrap;
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.search-box {
    position: relative;
    display: flex;
}

.search-box input {
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 0.25rem;
    font-size: 0.9rem;
    min-width: 180px;
}

.search-box button {
    background: none;
    border: none;
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--secondary-color);
}

.search-box button:hover {
    color: var(--primary-color);
}

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

.menu-toggle .icon-bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--heading-color);
    margin: 5px 0;
    transition: all 0.3s ease;
}

.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('/assets/images/hero-bg.jpg') no-repeat center center/cover;
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: #fff;
}

.hero-section p {
    font-size: 1.25rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer Specific Styles */
.site-footer {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: 60px 0 20px;
    font-size: 0.9rem;
}

.footer-widgets {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 40px;
}

.footer-widget {
    flex: 1;
    min-width: 250px;
}

.footer-widget h3 {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
}

.footer-widget h3::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background-color: var(--primary-color);
    margin-top: 10px;
}

.footer-widget p {
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-widget ul {
    margin: 0;
    padding: 0;
}

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

.footer-widget ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
}

.footer-widget ul li a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-widget.contact-info p i {
    margin-right: 8px;
    color: var(--primary-color);
}

.social-media {
    margin-top: 15px;
    display: flex;
    gap: 10px;
}

.social-media a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
    transition: background-color 0.3s ease;
}

.social-media a:hover {
    background-color: var(--primary-color);
    text-decoration: none;
}

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

.newsletter input[type="email"] {
    flex-grow: 1;
    padding: 10px 15px;
    border: none;
    border-radius: 0.25rem 0 0 0.25rem;
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.newsletter input[type="email"]::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.newsletter .btn-subscribe {
    background-color: var(--primary-color);
    border: none;
    border-radius: 0 0.25rem 0.25rem 0;
    padding: 10px 20px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
}

/* Responsive Adjustments */
@media (max-width: 992px) {
    .main-navigation .nav-menu {
        display: none; /* Hide main menu on smaller screens */
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-color);
        border-top: 1px solid var(--border-color);
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        z-index: 99;
    }

    .main-navigation .nav-menu.active {
        display: flex;
    }

    .main-navigation .nav-menu > .menu-item > a {
        padding: 12px 15px;
        border-bottom: 1px solid var(--border-color);
    }

    .main-navigation .submenu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background-color: var(--light-color);
        padding-left: 20px;
        border-top: 1px solid var(--border-color);
    }

    .main-navigation .has-submenu:hover > .submenu {
        display: block; /* Ensure submenu is visible */
    }

    .menu-toggle {
        display: block; /* Show hamburger icon */
    }

    .main-header-content {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }

    .header-actions {
        order: 3; /* Move actions below logo and nav toggle */
        width: 100%;
        justify-content: center;
    }

    .hero-section h1 {
        font-size: 2.5rem;
    }

    .hero-section p {
        font-size: 1rem;
    }

    .footer-widgets {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .header-top-bar .top-bar-content {
        flex-direction: column;
        gap: 5px;
    }

    .header-top-bar .top-bar-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-section {
        padding: 60px 0;
    }
}

/* FontAwesome for icons - assumed linked in global head */
.fas, .fab {
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
}
/* 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;
  }
}