/* Base Styles */
:root {
    --primary-color: #e63946;
    --secondary-color: #f1faee;
    --text-color: #1d3557;
    --light-color: #a8dadc;
    --dark-color: #457b9d;
    --link-color: #e63946;
    --footer-bg: #1d3557;
    --footer-text: #f1faee;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

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

a:hover {
    color: var(--dark-color);
}

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

ul {
    list-style: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Button Styles */
.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-align: center;
    transition: var(--transition);
}

.btn:hover {
    background-color: var(--dark-color);
    color: white;
    transform: translateY(-2px);
}

/* Header Styles */
header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 15px;
}

header h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
}

header nav ul {
    display: flex;
}

header nav ul li {
    margin-left: 20px;
}

header nav ul li a {
    color: var(--text-color);
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 5px;
}

header nav ul li a:hover,
header nav ul li a.active {
    color: var(--primary-color);
    background-color: var(--secondary-color);
}

/* Hero Section */
.hero {
    margin: 30px 0;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: var(--card-shadow);
}

/* Main Content Sections */
main {
    padding: 40px 0;
}

section {
    margin-bottom: 40px;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 10px;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    width: 60px;
    background-color: var(--primary-color);
}

/* Grid Layouts */
.categories-grid,
.recommendations-grid,
.author-grid,
.item-grid,
.authors-grid,
.works-gallery {
    display: grid;
    gap: 30px;
}

.categories-grid,
.authors-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.recommendations-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.item-grid {
    grid-template-columns: 1fr;
}

.works-gallery {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

/* Card Styles */
.category-card,
.recommendation-card,
.author-card,
.item-card {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.category-card:hover,
.recommendation-card:hover,
.author-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.category-card.large img {
    height: 250px;
}

.category-card h3,
.recommendation-card h3,
.author-card h3,
.item-card h3 {
    padding: 15px 15px 5px;
    font-size: 1.3rem;
    color: var(--primary-color);
}

.category-card p,
.recommendation-card p,
.author-card p {
    padding: 0 15px 15px;
    color: var(--text-color);
}

.category-card .btn,
.author-card .btn {
    margin: 0 15px 15px;
}

/* Item Card Styles */
.item-card {
    display: flex;
    flex-direction: column;
    margin-bottom: 30px;
}

.item-image {
    flex: 1;
}

.item-content {
    padding: 20px;
}

/* Search Bar */
.search-bar {
    display: flex;
    margin-bottom: 20px;
}

.search-bar input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 5px 0 0 5px;
    font-size: 1rem;
}

.search-bar button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 0 5px 5px 0;
    cursor: pointer;
    transition: var(--transition);
}

.search-bar button:hover {
    background-color: var(--dark-color);
}

/* Category Menu */
.category-menu {
    margin-bottom: 30px;
}

.category-menu ul {
    display: flex;
    background-color: var(--secondary-color);
    border-radius: 5px;
    overflow: hidden;
}

.category-menu ul li {
    flex: 1;
}

.category-menu ul li a {
    display: block;
    padding: 15px;
    text-align: center;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

.category-menu ul li a:hover,
.category-menu ul li a.active {
    background-color: var(--primary-color);
    color: white;
}

/* Author Detail Page */
.author-detail {
    background-color: white;
    border-radius: 10px;
    box-shadow: var(--card-shadow);
    padding: 30px;
}

.author-header {
    margin-bottom: 30px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 20px;
}

.author-header h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.author-header .years {
    font-size: 1.2rem;
    color: var(--dark-color);
}

.author-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.author-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: var(--card-shadow);
}

.info-section {
    margin-bottom: 20px;
}

.info-section h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.info-section ul {
    list-style: disc;
    padding-left: 20px;
    margin-bottom: 15px;
}

.info-section p {
    margin-bottom: 15px;
}

.author-works {
    margin-top: 30px;
}

.author-works h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.works-gallery img {
    border-radius: 10px;
    box-shadow: var(--card-shadow);
}

.back-link {
    margin-top: 30px;
    text-align: center;
}

/* Footer Styles */
footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: 30px 0;
    text-align: center;
}

/* Media Queries */
@media (min-width: 768px) {
    .item-card {
        flex-direction: row;
    }
    
    .item-image {
        width: 300px;
    }
    
    .item-content {
        flex: 1;
    }
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    
    header nav {
        margin-top: 15px;
    }
    
    header nav ul {
        justify-content: center;
    }
    
    .author-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    section h2 {
        font-size: 1.5rem;
    }
    
    .category-menu ul {
        flex-direction: column;
    }
    
    .category-menu ul li a {
        border-bottom: 1px solid #ddd;
    }
    
    .category-menu ul li:last-child a {
        border-bottom: none;
    }
}