:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --gray-color: #95a5a6;
}

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

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #f5f7fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 30px;
}

header {
    background-color: var(--dark-color);
    color: white;
    padding: 2rem 0;
    grid-column: 1 / -1;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.logo span {
    color: var(--primary-color);
}

nav ul {
    display: flex;
    list-style: none;
}

nav li {
    margin-left: 1.5rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--primary-color);
}

.search-box {
    margin: 2rem 0;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-box button {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    padding: 0 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: background-color 0.3s;
}

.search-box button:hover {
    background-color: #2980b9;
}

.articles {
    display: grid;
    gap: 2rem;
}

.article-card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.article-image {
    height: 200px;
    background-color: #eee;
    background-size: cover;
    background-position: center;
}

.article-content {
    padding: 1.5rem;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    color: var(--gray-color);
    font-size: 0.9rem;
}

.article-category {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    background-color: var(--light-color);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--dark-color);
}

.article-title {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.article-excerpt {
    color: #666;
    margin-bottom: 1.5rem;
}

.read-more {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.read-more:hover {
    color: #2980b9;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.widget {
    background-color: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.widget-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--light-color);
    color: var(--dark-color);
}

.calendar {
    width: 100%;
    border-collapse: collapse;
}

.calendar th, .calendar td {
    text-align: center;
    padding: 0.5rem;
}

.calendar th {
    background-color: var(--light-color);
    font-weight: normal;
}

.calendar td {
    border: 1px solid #eee;
}

.calendar td.today {
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
}

.calendar td:hover {
    background-color: var(--light-color);
    cursor: pointer;
}

.categories-list {
    list-style: none;
}

.categories-list li {
    margin-bottom: 0.8rem;
}

.categories-list a {
    display: flex;
    justify-content: space-between;
    color: var(--dark-color);
    text-decoration: none;
    transition: color 0.3s;
}

.categories-list a:hover {
    color: var(--primary-color);
}

.category-count {
    background-color: var(--light-color);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
}

footer {
    background-color: var(--dark-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
    grid-column: 1 / -1;
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    nav ul {
        display: none;
    }
}