* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    background-color: #f5f7fa;
    font-family: "Microsoft YaHei", sans-serif;
}
/* 主容器 */
.main-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px;
}
/* 页面标题 */
.idiom-page-title {
    text-align: center;
    margin-bottom: 30px;
    color: #2d3748;
    font-size: 28px;
    font-weight: 600;
    position: relative;
}
.idiom-page-title::after {
    content: "";
    display: block;
    width: 80px;
    height: 3px;
    background-color: #4299e1;
    margin: 10px auto 0;
}

/* 分类导航条 - 更灵活好看 */
.category-section {
    margin-bottom: 30px;
}
.category-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
}
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
}
.category-item {
    background: #fff;
    border-radius: 10px;
    padding: 18px 10px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transition: 0.3s;
    font-size: 14px;
    color: #2d3748;
    text-decoration: none;
}
.category-item:hover {
    background: #4299e1;
    color: #fff;
    transform: translateY(-3px);
}

/* 成语卡片列表 */
.idiom-card-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}
.idiom-card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    padding: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
    text-decoration: none;
}
.idiom-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.idiom-name {
    font-size: 20px;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 8px;
}
.idiom-pinyin {
    color: #718096;
    font-size: 14px;
    margin-bottom: 12px;
}
.idiom-brief {
    color: #4a5568;
    font-size: 13px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.idiom-more {
    display: inline-block;
    margin-top: 15px;
    color: #4299e1;
    font-size: 13px;
    text-decoration: none;
}
.idiom-more:hover {
    text-decoration: underline;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .idiom-page-title {
        font-size: 24px;
    }
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .idiom-card-list {
        grid-template-columns: 1fr;
    }
}