/* shared.css - Common styles for the entire website */

/* Basic Reset & Typography */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: #007bff;
    text-decoration: none;
    transition: color 0.3s ease, text-decoration 0.3s ease;
}

a:hover {
    color: #0056b3;
    text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
    color: #222;
    margin-bottom: 0.5em;
    font-weight: 500;
}

p {
    margin-bottom: 1em;
}

ul {
    list-style: none;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: #007bff;
    color: #fff;
    border-color: #007bff;
}

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

.btn-secondary {
    background-color: #6c757d;
    color: #fff;
    border-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #545b62;
}

/* Header Styles */
.main-header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.main-header .logo {
    display: flex;
    align-items: center;
}

.main-header .logo img {
    height: 40px;
    margin-right: 10px;
}

.main-header .logo h1 {
    font-size: 24px;
    margin: 0;
    color: #333;
}

.main-nav ul {
    display: flex;
    margin: 0;
    padding: 0;
}

.main-nav ul li {
    position: relative;
    margin-left: 30px;
}

.main-nav ul li a {
    display: block;
    padding: 10px 0;
    color: #555;
    font-weight: 500;
    transition: color 0.3s ease;
}

.main-nav ul li a:hover,
.main-nav ul li a.active {
    color: #007bff;
    text-decoration: none;
}

.main-nav .submenu {
    display: none;
    position: absolute;
    background-color: #fff;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    min-width: 160px;
    z-index: 1;
    padding: 10px 0;
    border-radius: 5px;
    left: 0;
    top: 100%; /* Position below the parent */
    margin-top: 5px; /* Small gap */
}

.main-nav ul li:hover > .submenu {
    display: block;
}

.main-nav .submenu li {
    margin: 0;
}

.main-nav .submenu li a {
    padding: 8px 15px;
    color: #333;
    white-space: nowrap;
}

.main-nav .submenu li a:hover {
    background-color: #f0f0f0;
    color: #007bff;
}

.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 5px;
    color: #333;
}

/* Main Content */
main#content {
    padding: 20px 0;
    min-height: 60vh; /* Ensure content area has some height */
}

/* Footer Styles */
.main-footer {
    background-color: #222;
    color: #f8f9fa;
    padding: 40px 0 20px;
    font-size: 14px;
}

.main-footer a {
    color: #f8f9fa;
    transition: color 0.3s ease;
}

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

.main-footer h3 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 18px;
}

.main-footer p {
    margin-bottom: 10px;
}

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

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

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

.main-footer .footer-col ul li:last-child {
    margin-bottom: 0;
}

.main-footer .social-links a {
    display: inline-block;
    color: #fff;
    font-size: 20px;
    margin-right: 15px;
    transition: color 0.3s ease;
}

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

.main-footer .contact-info p i {
    margin-right: 8px;
    color: #007bff;
}

.main-footer .newsletter-signup {
    margin-top: 20px;
}

.main-footer .newsletter-signup h4 {
    color: #fff;
    margin-bottom: 10px;
    font-size: 16px;
}

.main-footer .newsletter-signup form {
    display: flex;
    gap: 5px;
}

.main-footer .newsletter-signup input[type="email"] {
    padding: 8px 12px;
    border: 1px solid #555;
    border-radius: 5px;
    background-color: #333;
    color: #fff;
    flex-grow: 1;
}

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

.main-footer .newsletter-signup button {
    padding: 8px 15px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.main-footer .newsletter-signup button:hover {
    background-color: #0056b3;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 20px;
    margin-top: 30px;
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 5px;
    color: #bbb;
}

/* Responsive Adjustments */
@media (max-width: 992px) {
    .main-nav {
        display: none; /* Hide navigation on smaller screens by default */
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 70px; /* Adjust based on header height */
        left: 0;
        background-color: #fff;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        padding-bottom: 10px;
    }

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

    .main-nav ul {
        flex-direction: column;
        width: 100%;
    }

    .main-nav ul li {
        margin: 0;
        border-bottom: 1px solid #eee;
        width: 100%;
    }

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

    .main-nav ul li a {
        padding: 15px 20px;
    }

    .main-nav .submenu {
        position: static;
        box-shadow: none;
        padding: 0;
        margin: 0;
        background-color: #f9f9f9;
        border-top: 1px solid #eee;
    }

    .main-nav .submenu li a {
        padding-left: 40px;
    }

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

    .header-actions .btn {
        display: none; /* Hide login/register on small screens, can be moved to mobile menu */
    }

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

    .main-footer .footer-col {
        margin-bottom: 20px;
    }

    .main-footer .newsletter-signup form {
        flex-direction: column;
        gap: 10px;
    }
    .main-footer .newsletter-signup button {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .main-header .logo h1 {
        font-size: 20px;
    }
    .main-header .logo img {
        height: 35px;
    }
}
/* 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;
  }
}