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

:root {
    --primary-color: #2c7a7b;
    --secondary-color: #38b2ac;
    --accent-color: #81e6d9;
    --text-color: #2d3748;
    --light-bg: #f7fafc;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: background-color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    background-color: rgba(255, 255, 255, 0.2);
}

.hero {
    background: linear-gradient(135deg, rgba(44, 122, 123, 0.9), rgba(56, 178, 172, 0.9)),
                url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=周口市文化风景，中国传统文化，历史建筑，自然风光&image_size=landscape_16_9') center/cover;
    color: white;
    padding: 5rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.3rem;
    max-width: 800px;
    margin: 0 auto 2rem;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
    color: var(--primary-color);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-content {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.card-category {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--accent-color);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

.region-grid,
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.region-card,
.category-card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
    cursor: pointer;
}

.region-card:hover,
.category-card:hover {
    transform: translateY(-5px);
}

.region-icon,
.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.detail-container {
    background: var(--white);
    border-radius: 12px;
    padding: 3rem;
    box-shadow: var(--shadow);
    margin-top: 2rem;
}

.detail-header {
    display: flex;
    gap: 3rem;
    margin-bottom: 2rem;
}

.detail-img {
    width: 400px;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
}

.detail-info h1 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.breadcrumb {
    margin: 1rem 0;
    color: #718096;
}

.breadcrumb a {
    color: var(--secondary-color);
    text-decoration: none;
}

.about-content {
    background: var(--white);
    border-radius: 12px;
    padding: 3rem;
    box-shadow: var(--shadow);
}

@media (max-width: 768px) {
    .nav-links {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .detail-header {
        flex-direction: column;
    }
    
    .detail-img {
        width: 100%;
        height: 250px;
    }
}