/* Basic Reset & Global Styles */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --accent-color: #28a745;
    --dark-color: #343a40;
    --light-color: #f8f9fa;
    --text-color: #333;
    --border-color: #dee2e6;
    --font-family-primary: 'Arial', sans-serif;
    --font-family-secondary: 'Georgia', serif;
    --box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    --transition-speed: 0.3s;
}

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

body {
    font-family: var(--font-family-primary);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
    -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;
    transition: color var(--transition-speed) ease;
}

a:hover {
    color: darken(var(--primary-color), 10%);
    text-decoration: underline;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button, input[type="submit"] {
    cursor: pointer;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 1rem;
    transition: background-color var(--transition-speed) ease;
}

.button {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    text-align: center;
    text-decoration: none;
    font-weight: bold;
    transition: all var(--transition-speed) ease;
}

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

.primary-button:hover {
    background-color: darken(var(--primary-color), 10%);
    color: white;
    text-decoration: none;
}

.secondary-button {
    background-color: var(--secondary-color);
    color: white;
}

.secondary-button:hover {
    background-color: darken(var(--secondary-color), 10%);
    color: white;
    text-decoration: none;
}

.large-button {
    padding: 15px 30px;
    font-size: 1.1rem;
}

/* Header Specific Styles */
.main-header {
    background-color: white;
    box-shadow: var(--box-shadow);
    padding: 15px 0;
    position: relative;
    z-index: 1000;
}

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

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

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--dark-color);
}

.logo img {
    margin-right: 10px;
}

.brand-name {
    display: none; /* Hide on small screens, show on larger */
}

@media (min-width: 768px) {
    .brand-name {
        display: inline;
    }
}

.main-nav .nav-list {
    display: flex;
    gap: 20px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 10px 0;
    font-weight: bold;
    color: var(--dark-color);
}

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

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    box-shadow: var(--box-shadow);
    min-width: 200px;
    border-radius: 5px;
    padding: 10px 0;
    z-index: 10;
}

.nav-item.dropdown:hover .dropdown-menu {
    display: block;
}

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

.dropdown-menu li a:hover {
    background-color: var(--light-color);
    text-decoration: none;
}

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

.search-box {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    overflow: hidden;
}

.search-input {
    border: none;
    padding: 8px 10px;
    outline: none;
}

.search-button {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 12px;
    border-radius: 0;
}

.search-button:hover {
    background-color: darken(var(--primary-color), 10%);
}

.user-menu {
    display: flex;
    gap: 10px;
}

.login-link, .signup-link {
    padding: 8px 15px;
}

.menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-color);
    padding: 5px;
}

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

/* Hero Section Styles */
.hero-section {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://example.com/hero-bg.jpg') no-repeat center center/cover;
    color: white;
    text-align: center;
    padding: 80px 0;
}

.hero-section h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-family: var(--font-family-secondary);
}

.hero-section p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-button {
    margin-bottom: 20px;
}

.hero-subtext {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.feature-item {
    background-color: rgba(255,255,255,0.1);
    padding: 20px;
    border-radius: 8px;
    width: 280px;
    text-align: left;
    box-shadow: var(--box-shadow);
}

.feature-item h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--accent-color);
}

.feature-item p {
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 0;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.footer-column p {
    margin-bottom: 10px;
    line-height: 1.8;
}

.footer-column ul {
    padding: 0;
}

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

.footer-column ul li a {
    color: white;
    transition: color var(--transition-speed) ease;
}

.footer-column ul li a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

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

.social-links 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: white;
    font-size: 1.1rem;
    transition: background-color var(--transition-speed) ease;
}

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

.contact-info-col p i {
    margin-right: 10px;
    color: var(--accent-color);
}

.newsletter-signup {
    margin-top: 30px;
}

.newsletter-signup h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--accent-color);
}

.newsletter-signup p {
    margin-bottom: 15px;
}

.newsletter-signup form {
    display: flex;
    gap: 10px;
}

.newsletter-signup input[type="email"] {
    flex-grow: 1;
    padding: 10px 15px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 5px;
    background-color: rgba(0,0,0,0.2);
    color: white;
    outline: none;
}

.newsletter-signup input[type="email"]::placeholder {
    color: rgba(255,255,255,0.7);
}

.subscribe-button {
    background-color: var(--accent-color);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
}

.subscribe-button:hover {
    background-color: darken(var(--accent-color), 10%);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    text-align: center;
    margin-top: 30px;
}

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

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

.footer-bottom a:hover {
    color: var(--accent-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .main-header .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .main-nav {
        width: 100%;
        margin-top: 15px;
    }

    .main-nav .nav-list {
        flex-direction: column;
        gap: 0;
    }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-link {
        padding: 12px 15px;
    }

    .dropdown-menu {
        position: static;
        box-shadow: none;
        background-color: var(--light-color);
        border-radius: 0;
        padding: 0 0 0 20px;
    }

    .dropdown-menu li a {
        padding: 8px 0;
    }

    .header-actions {
        width: 100%;
        justify-content: space-between;
        margin-top: 15px;
    }

    .search-box {
        flex-grow: 1;
    }

    .user-menu {
        margin-left: 15px;
    }

    .menu-toggle {
        display: block;
    }

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

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

    .hero-features {
        flex-direction: column;
        align-items: center;
    }

    .feature-item {
        width: 90%;
    }

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

    .footer-column ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }

    .footer-column ul li {
        width: auto;
        margin-bottom: 0;
    }

    .social-links {
        justify-content: center;
    }

    .newsletter-signup form {
        flex-direction: column;
        gap: 15px;
    }

    .newsletter-signup input[type="email"],
    .subscribe-button {
        width: 100%;
    }
}
/* 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;
  }
}