/* 基础样式和变量 */
:root {
--primary-color: #000079;
--text-color: #333;
--light-text: #fff;
--bg-color: #f5f5f5;
--card-bg: #fff;
--border-color: #ddd;
--hover-color: #0000a0;
--shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
--transition: all 0.3s ease;
}

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

body {
font-family: 'Arial', sans-serif;
line-height: 1.6;
color: var(--text-color);
background-color: var(--bg-color);
}

a {
text-decoration: none;
color: inherit;
}

ul {
list-style: none;
}

.container {
width: 100%;
max-width: 1200px;
margin: 0 auto;
padding: 0 15px;
}

/* 导航栏样式 */
.navbar {
background-color: var(--primary-color);
color: var(--light-text);
position: sticky;
top: 0;
z-index: 1000;
box-shadow: var(--shadow);
display: flex;
justify-content: center;
}

.nav-container {
width: 100%;
max-width: 1200px;
display: flex;
justify-content: space-between;
align-items: center;
padding: 15px;
}

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

.logo:hover {
transform: scale(1.05);
text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.nav-menu {
display: flex;
}

.nav-item {
margin-left: 25px;
position: relative;
}

.nav-link {
padding: 10px 15px;
transition: var(--transition);
position: relative;
display: inline-block;
overflow: hidden;
}

.nav-link::before {
content: '';
position: absolute;
top: 0;
left: -100%;
width: 100%;
height: 100%;
background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
transition: left 0.5s ease;
}

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

.nav-link::after {
content: '';
position: absolute;
bottom: 0;
left: 0;
width: 0;
height: 2px;
background-color: #fff;
transition: width 0.3s ease;
}

.nav-link:hover::after {
width: 100%;
}

.nav-link:hover {
color: #fff;
text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}

.hamburger {
display: none;
cursor: pointer;
font-size: 1.5rem;
}

/* 面包屑导航 */
.breadcrumb {
padding: 15px 0;
margin-bottom: 20px;
font-size: 0.9rem;
}

.breadcrumb a {
color: var(--primary-color);
transition: var(--transition);
}

.breadcrumb a:hover {
color: var(--hover-color);
}

.breadcrumb span {
margin: 0 5px;
}

/* 主要内容区域 */
.main-content {
display: flex;
gap: 30px;
margin-bottom: 40px;
}

.left-column {
flex: 3;
}

.right-column {
flex: 1;
}

/* 标签列表样式 */
.tags-section {
margin-bottom: 30px;
}

.section-title {
font-size: 1.5rem;
margin-bottom: 20px;
color: var(--primary-color);
padding-bottom: 10px;
border-bottom: 2px solid var(--primary-color);
}

.tags-grid {
display: grid;
grid-template-columns: repeat(6, 1fr);
gap: 15px;
}

.tag-item {
background-color: var(--card-bg);
padding: 12px 10px;
text-align: center;
border-radius: 3px;
box-shadow: var(--shadow);
transition: var(--transition);
font-size: 0.9rem;
}

.tag-item:hover {
background-color: var(--primary-color);
color: var(--light-text);
transform: translateY(-3px);
}

/* 文章列表样式 */
.articles-list {
margin-bottom: 40px;
}

.article-item {
display: flex;
background-color: var(--card-bg);
margin-bottom: 20px;
border-radius: 5px;
overflow: hidden;
box-shadow: var(--shadow);
transition: var(--transition);
}

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

.article-thumbnail {
flex: 0 0 200px;
height: 150px;
background-size: cover;
background-position: center;
}

.article-info {
flex: 1;
padding: 15px;
}

.article-title {
font-size: 1.2rem;
margin-bottom: 10px;
white-space: normal;
word-wrap: break-word;
overflow: visible;
text-overflow: ellipsis;
}

.article-title a {
color: var(--text-color);
transition: var(--transition);
}

.article-title a:hover {
color: var(--primary-color);
}

.article-meta {
display: flex;
font-size: 0.9rem;
color: #666;
margin-bottom: 10px;
gap: 20px;
}

.article-meta span {
display: flex;
align-items: center;
}

.author::before {
content: "👤";
margin-right: 5px;
}

.date::before {
content: "📅";
margin-right: 5px;
}

.views::before {
content: "👁";
margin-right: 5px;
}

.article-excerpt {
color: #555;
line-height: 1.5;
display: -webkit-box;
-webkit-line-clamp: 3;
-webkit-box-orient: vertical;
overflow: hidden;
}

/* 侧边栏样式 */
.sidebar-section {
margin-bottom: 30px;
}

.sidebar-list {
background-color: var(--card-bg);
border-radius: 5px;
box-shadow: var(--shadow);
padding: 15px;
}

.sidebar-item {
padding: 10px 0;
border-bottom: 1px solid var(--border-color);
transition: var(--transition);
}

.sidebar-item:last-child {
border-bottom: none;
}

.sidebar-item a {
display: block;
transition: var(--transition);
}

.sidebar-item a:hover {
color: var(--primary-color);
padding-left: 5px;
}

/* 翻页按钮 */
.pagination {
display: flex;
justify-content: center;
margin-top: 30px;
}

.pagination a {
display: inline-block;
padding: 8px 15px;
margin: 0 5px;
background-color: var(--card-bg);
border-radius: 3px;
box-shadow: var(--shadow);
transition: var(--transition);
}

.pagination a:hover, .pagination a.active {
background-color: var(--primary-color);
color: var(--light-text);
}

/* 底部样式 */
footer {
background-color: var(--primary-color);
color: var(--light-text);
text-align: center;
padding: 20px 0;
margin-top: 40px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
.hamburger {
display: block;
}

.nav-menu {
position: fixed;
left: -100%;
top: 70px;
flex-direction: column;
background-color: var(--primary-color);
width: 100%;
text-align: center;
transition: var(--transition);
box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
}

.nav-menu.active {
left: 0;
}

.nav-item {
margin: 15px 0;
}

.tags-grid {
grid-template-columns: repeat(4, 1fr);
}

.copyright {
display: none;
}
}

@media (max-width: 768px) {
.main-content {
flex-direction: column;
}

.article-item {
flex-direction: column;
}

.article-thumbnail {
flex: 0 0 200px;
width: 100%;
}

.article-meta {
flex-direction: column;
gap: 5px;
}
}

@media (max-width: 500px) {
.tags-grid {
grid-template-columns: repeat(2, 1fr);
}
}