/* Basic Reset & Typography */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --dark-color: #343a40;
    --light-color: #f8f9fa;
    --text-color: #212529;
    --font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

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

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

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

/* Buttons */
.btn {
    display: inline-block;
    background: var(--primary-color);
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-size: 1rem;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    background-color: #0056b3; /* Darken primary color */
    transform: translateY(-2px);
}

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

.btn-secondary {
    background-color: var(--secondary-color);
    margin-left: 10px;
}

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

/* Header Styles */
.main-header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: relative;
    z-index: 1000;
}

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

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

.header-top-bar .top-links a {
    color: var(--light-color);
    text-decoration: none;
    margin-left: 15px;
    transition: color 0.3s ease;
}

.header-top-bar .top-links a:hover {
    color: var(--primary-color);
}

.main-nav {
    padding: 15px 0;
}

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

.main-nav .logo img {
    height: 40px;
    width: auto;
}

.menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    position: relative;
    z-index: 1002;
}

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

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

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

.nav-link {
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    padding: 10px 0;
    display: block;
    transition: color 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
}

.has-dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

.dropdown-menu {
    display: none;
    position: absolute;
    background-color: #fff;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    min-width: 180px;
    z-index: 1001;
    border-radius: 5px;
    overflow: hidden;
    top: calc(100% + 10px); /* Position below the parent link with some gap */
    left: 0;
    padding: 10px 0;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.dropdown-item {
    color: var(--text-color);
    padding: 10px 15px;
    text-decoration: none;
    display: block;
    white-space: nowrap;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.dropdown-item:hover {
    background-color: var(--light-color);
    color: var(--primary-color);
}

.search-box {
    display: flex;
    margin-left: 25px;
}

.search-input {
    border: 1px solid #ccc;
    padding: 8px 12px;
    border-radius: 5px 0 0 5px;
    font-size: 0.9rem;
    outline: none;
    flex-grow: 1;
}

.search-input:focus {
    border-color: var(--primary-color);
}

.search-button {
    background-color: var(--primary-color);
    color: #fff;
    border: 1px solid var(--primary-color);
    padding: 8px 15px;
    border-radius: 0 5px 5px 0;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

/* Hero Section */
.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('/assets/hero-bg.jpg') no-repeat center center/cover;
    color: #fff;
    text-align: center;
    padding: 80px 0;
    margin-bottom: 40px;
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-section p {
    font-size: 1.25rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* Footer Styles */
.main-footer {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: 50px 0 20px;
    font-size: 0.9rem;
}

.main-footer a {
    color: var(--light-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.footer-col h3 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col.company-info .footer-logo img {
    height: 32px;
    margin-bottom: 15px;
}

.footer-col.company-info p {
    margin-bottom: 20px;
}

.social-links a {
    display: inline-block;
    width: 36px;
    height: 36px;
    line-height: 36px;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    margin-right: 10px;
    font-size: 1.1rem;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: #fff;
}

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

.newsletter-form input[type="email"] {
    flex-grow: 1;
    padding: 10px 15px;
    border: none;
    border-radius: 5px 0 0 5px;
    outline: none;
    font-size: 0.9rem;
}

.newsletter-form .btn-subscribe {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 0 5px 5px 0;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.newsletter-privacy-note {
    margin-top: 10px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    margin-top: 30px;
    text-align: center;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

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

.footer-bottom .legal-links a {
    margin: 0 10px;
}

/* Responsive Adjustments */
@media (max-width: 992px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: #fff;
        position: absolute;
        top: 100%;
        left: 0;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        padding: 10px 0;
        border-top: 1px solid #eee;
    }

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

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

    .nav-item:last-child {
        border-bottom: none;
    }

    .nav-link {
        padding: 12px 20px;
    }

    .menu-toggle {
        display: block;
    }

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

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

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

    .hero-section p {
        font-size: 1.1rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-col ul {
        padding-left: 0;
    }

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

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

    .footer-bottom .legal-links {
        margin-top: 10px;
    }

    .dropdown-menu {
        position: static;
        box-shadow: none;
        border-radius: 0;
        padding: 0;
        display: none;
        opacity: 1;
        transform: none;
        pointer-events: all;
        background-color: #f9f9f9;
    }

    .has-dropdown:hover .dropdown-menu {
        display: none; /* Disable hover effect for mobile */
    }

    .nav-item.has-dropdown > .nav-link {
        position: relative;
    }

    .nav-item.has-dropdown > .nav-link::after {
        content: '+';
        position: absolute;
        right: 20px;
        font-size: 1.2em;
        line-height: 1;
        transition: transform 0.3s ease;
    }

    .nav-item.has-dropdown > .nav-link.active::after {
        content: '-';
        transform: rotate(180deg);
    }
}

@media (max-width: 768px) {
    .header-top-bar .container {
        flex-direction: column;
        text-align: center;
    }
    .header-top-bar .top-links {
        margin-top: 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;
  }
}