/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
}

/* 导航栏样式 */
/* 导航栏样式 */
.navbar {
    background-color: transparent;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: none;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-left {
    display: flex;
    gap: 2rem;
}

.nav-item {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-item:hover {
    color: #007bff;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
}

.nav-item.active {
    color: #007bff;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
}

/* 添加底线效果 */
.nav-item::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: transparent;
    transition: background 0.3s ease;
}

.nav-item:hover::after {
    background: linear-gradient(90deg, rgba(0, 123, 255, 0.8), rgba(0, 255, 255, 0.8));
}

.nav-item.active::after {
    background: linear-gradient(90deg, rgba(0, 123, 255, 0.8), rgba(0, 255, 255, 0.8));
}

/* 搜索框样式 */
.search-container {
    display: flex;
    align-items: center;
    background-color: #f5f5f5;
    border-radius: 20px;
    padding: 0.5rem;
}

.search-input {
    border: none;
    background: none;
    padding: 0.5rem;
    outline: none;
    width: 200px;
}

.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: #666;
}

/* 资源分类导航 */
.resources-nav {
    background: #fff;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    position: sticky;
    top: 60px;
    z-index: 900;
    backdrop-filter: blur(10px);
}

.resources-nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 2rem;
    position: relative;
}

.resource-nav-item {
    text-decoration: none;
    color: #333;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.resource-nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent,
        var(--glow-spread-color),
        transparent
    );
    transition: 0.5s;
}

.resource-nav-item:hover::before {
    left: 100%;
}

.nav-indicator {
    position: absolute;
    bottom: -5px;
    height: 3px;
    background: var(--glow-color);
    transition: all 0.3s ease;
    box-shadow: 0 0 8px var(--glow-color);
    border-radius: 2px;
}

.resource-nav-item i {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.resource-nav-item:hover {
    background: rgba(0, 123, 255, 0.1);
    transform: translateY(-2px);
}

.resource-nav-item:hover i {
    transform: scale(1.2);
}

.resource-nav-item.active {
    background-color: var(--glow-color);
    color: white;
    box-shadow: 0 0 15px var(--glow-spread-color);
}

.resources-section {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.resources-section.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* 主要内容区域 */
.resources-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.resources-section {
    display: none;
}

.resources-section.active {
    display: block;
}

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

/* 添加科技感变量 */
:root {
    --glow-color: #007bff;
    --glow-spread-color: rgba(0, 123, 255, 0.2);
    --enhanced-glow-color: rgba(0, 123, 255, 0.3);
    --btn-color: rgb(61, 106, 255);
}

/* 资源卡片样式 */
.resource-card {
    background: #fff;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 0 0.5rem var(--glow-spread-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(0, 123, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 1rem var(--glow-color);
    border-color: var(--glow-color);
}

.resource-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent,
        var(--glow-spread-color),
        transparent
    );
    transition: 0.5s;
}

.resource-card:hover::before {
    left: 100%;
}

.resource-card h3 {
    color: #007bff;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.resource-card p {
    color: #666;
    margin-bottom: 1rem;
}

.tag-stack {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tag-stack span {
    background: rgba(0, 123, 255, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.9rem;
    color: var(--glow-color);
    border: 1px solid rgba(0, 123, 255, 0.2);
    transition: all 0.3s ease;
}

.tag-stack span:hover {
    background: rgba(0, 123, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 0 8px var(--glow-spread-color);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #eee;
}

.update-time {
    color: #888;
    font-size: 0.9rem;
}

.visit-link {
    color: var(--glow-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.visit-link:hover {
    color: var(--glow-color);
    background: rgba(0, 123, 255, 0.1);
    border-color: var(--glow-color);
    box-shadow: 0 0 8px var(--glow-spread-color);
}

.visit-link::after {
    content: '→';
    transition: transform 0.3s ease;
}

.visit-link:hover::after {
    transform: translateX(4px);
}

/* 页脚样式 */
.footer {
    background-color: #f8f9fa;
    padding: 1.5rem;
    text-align: center;
    margin-top: 2rem;
    color: #666;
}

/* 项目分类导航样式 */
.projects-nav {
    background-color: #f8f9fa; /* 背景颜色 */
    padding: 10px 0; /* 内边距 */
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); /* 阴影效果 */
    position: relative; /* 使伪元素相对于导航栏定位 */
    overflow: hidden; /* 隐藏溢出部分 */
}

.projects-nav-inner {
    display: flex; /* 使用 flexbox 布局 */
    justify-content: space-around; /* 项目均匀分布 */
    position: relative; /* 使伪元素相对于内部容器定位 */
}

.project-nav-item {
    color: #333; /* 字体颜色 */
    text-decoration: none; /* 去掉下划线 */
    padding: 10px 15px; /* 内边距 */
    border-radius: 5px; /* 圆角 */
    transition: transform 0.3s; /* 变换过渡效果 */
    position: relative; /* 使伪元素相对于导航项定位 */
    background-color: transparent; /* 去掉默认背景颜色 */
}

.project-nav-item:hover {
    transform: translateY(-3px); /* 悬停时向上移动 */
    box-shadow: 0 2px 5px rgba(0, 123, 255, 0.3); /* 添加阴影效果 */
}

/* 添加底线效果 */
.project-nav-item::after {
    content: '';
    position: absolute;
    bottom: -5px; /* 底线位置 */
    left: 0;
    width: 100%;
    height: 2px; /* 底线高度 */
    background: transparent; /* 默认透明 */
    transition: background 0.3s ease; /* 过渡效果 */
}

.project-nav-item:hover::after {
    background: linear-gradient(90deg, rgba(0, 123, 255, 0.8), rgba(0, 255, 255, 0.8)); /* 悬停时的底线渐变 */
}