:root {
    --primary-color: #17408B;
    --secondary-color: #C9082A;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-secondary: #666666;
    --border-color: #eaeaea;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --hover-shadow: 0 8px 15px rgba(0, 0, 0, 0.08);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --spacing: 24px;
    --font-primary: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}

/* 暗色主题 */
.dark-theme {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --text-secondary: #aaaaaa;
    --border-color: #333333;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    --hover-shadow: 0 8px 15px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: var(--spacing);
    transition: var(--transition);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
}

/* 头部样式 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: calc(var(--spacing) * 1.5);
    flex-wrap: wrap;
    gap: var(--spacing);
}

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

.logo img {
    height: 50px;
    width: auto;
    border-radius: 10px;
}

.logo h1 {
    font-size: 28px;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.dark-theme .logo h1 {
    color: #4f7dde;
}

.search-box {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.search-box input {
    width: 100%;
    padding: 14px 20px;
    padding-left: 52px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--card-bg);
    color: var(--text-color);
    font-size: 16px;
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(23, 64, 139, 0.15);
}

.search-box i {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 18px;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    font-size: 24px;
    padding: 10px;
    border-radius: 50%;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
}

.theme-toggle:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.dark-theme .theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 分类样式 */
.category {
    margin-bottom: calc(var(--spacing) * 2);
}

.category-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing);
    padding-left: 12px;
    border-left: 5px solid var(--primary-color);
}

.category-header h2 {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

/* 卡片网格 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing);
}

/* 卡片样式 */
.card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: var(--spacing);
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 15px;
    overflow: hidden;
    position: relative;
}

.card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

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

.card:hover::after {
    transform: scaleX(1);
}

.card-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f5f5f5;
    border: 1px solid var(--border-color);
}

.dark-theme .card-icon {
    background-color: #2a2a2a;
    border-color: #444444;
}

.card-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.card-content {
    flex: 1;
    overflow: hidden;
}

.card-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-content p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 页脚样式 */
footer {
    margin-top: calc(var(--spacing) * 3);
    padding-top: var(--spacing);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    :root {
        --spacing: 16px;
    }
    
    header {
        flex-direction: column;
        align-items: flex-start;
    }

    .search-box {
        width: 100%;
    }

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

@media (max-width: 576px) {
    :root {
        --spacing: 12px;
    }
    
    .logo h1 {
        font-size: 24px;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 16px;
    }
}