/* 全局样式 */
:root {
    --primary-color: #007AFF;
    --text-color: #333;
    --bg-color: #fff;
    --card-bg: rgba(255, 255, 255, 0.8);
    --hover-color: #f5f5f5;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* 暗色模式变量 */
[data-theme="dark"] {
    --primary-color: #0A84FF;
    --text-color: #fff;
    --bg-color: #000;
    --card-bg: rgba(30, 30, 30, 0.8);
    --hover-color: #1c1c1e;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* 顶部导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.3s;
}

.theme-toggle:hover {
    background-color: var(--hover-color);
}

/* 主要内容区 */
main {
    max-width: 1200px;
    margin: 80px auto 0;
    padding: 2rem;
    animation: fadeIn 0.5s ease-out;
}

/* 搜索区域 */
.search-section {
    text-align: center;
    margin-bottom: 3rem;
}

.search-section h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    background: linear-gradient(45deg, var(--primary-color), #00C6FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    gap: 1rem;
}

.search-box input {
    flex: 1;
    padding: 1rem;
    border: 2px solid var(--shadow-color);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text-color);
    transition: border-color 0.3s;
}

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

.search-box button {
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    transition: transform 0.3s, background-color 0.3s;
}

.search-box button:hover {
    transform: translateY(-2px);
    background-color: #0056b3;
}

/* 分类区域 */
.section {
    margin-bottom: 4rem;
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-color);
}

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

.category-card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 4px 20px var(--shadow-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform 0.3s, box-shadow 0.3s;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px var(--shadow-color);
}

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.category-card ul {
    list-style: none;
}

.category-card li {
    margin-bottom: 1rem;
    position: relative;
}

.category-card a {
    color: var(--text-color);
    text-decoration: none;
    display: block;
    padding: 0.5rem 0;
    transition: color 0.3s;
}

.category-card a:hover {
    color: var(--primary-color);
}

/* 链接描述框 */
.link-description {
    position: absolute;
    left: 0;
    top: 100%;
    background: var(--card-bg);
    padding: 0.8rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--shadow-color);
    font-size: 0.9rem;
    color: var(--text-color);
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 100;
}

.category-card li:hover .link-description {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 2rem;
    background: var(--card-bg);
    margin-top: 4rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-direction: column;
        gap: 1rem;
    }

    .search-section h1 {
        font-size: 2rem;
    }

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

    .category-card {
        padding: 1.5rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
} 
}