/* 基础样式与重置 */
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Microsoft YaHei', sans-serif;
}

:root {
--primary-color: #d32f2f;
--primary-dark: #b71c1c;
--primary-light: #ff6659;
--text-color: #333;
--text-light: #777;
--background: #f9f9f9;
--card-bg: #ffffff;
--border-color: #e0e0e0;
--intro-bg: #f5f5f5;
}

body {
background-color: var(--background);
color: var(--text-color);
line-height: 1.6;
}

a {
text-decoration: none;
color: var(--primary-color);
transition: color 0.3s ease;
}

a:hover {
color: var(--primary-dark);
}

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

/* 导航栏样式 */
header {
background-color: var(--primary-color);
color: white;
padding: 15px 0;
position: sticky;
top: 0;
z-index: 100;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
display: flex;
justify-content: space-between;
align-items: center;
}

.logo {
font-size: 1.5rem;
font-weight: bold;
}

.logo a {
color: white;
}

.nav-menu {
display: flex;
list-style: none;
}

.nav-menu li {
margin-left: 25px;
}

.nav-menu a {
color: white;
font-weight: 500;
}

.nav-menu a:hover {
color: rgba(255, 255, 255, 0.8);
}

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

/* 面包屑导航 */
.breadcrumb {
padding: 15px 0;
font-size: 0.9rem;
color: var(--text-light);
}

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

.breadcrumb span {
margin: 0 5px;
}

/* 主内容区布局 */
.main-content {
display: grid;
grid-template-columns: 3fr 1fr;
gap: 30px;
margin: 30px 0;
}

/* 文章详情区域 */
.article-detail {
background-color: var(--card-bg);
border-radius: 5px;
padding: 20px;
box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

/* 文章头部信息 */
.article-header {
display: grid;
grid-template-columns: 100px 1fr;
gap: 20px;
align-items: center;
margin-bottom: 20px;
}

.article-thumbnail {
width: 100px;
height: 100px;
object-fit: cover;
border-radius: 5px;
}

.article-title-info {
display: flex;
flex-direction: column;
justify-content: center;
}

.article-title {
font-size: 1.8rem;
font-weight: bold;
margin-bottom: 10px;
color: var(--primary-dark);
}

.article-meta {
display: flex;
flex-wrap: wrap;
color: var(--text-light);
font-size: 0.9rem;
}

.meta-item {
display: flex;
align-items: center;
margin-right: 20px;
}

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

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

/* 导读信息 */
.article-intro {
background-color: var(--intro-bg);
padding: 15px;
border-left: 4px solid var(--primary-color);
margin-bottom: 20px;
font-style: italic;
}

/* 文章内容 */
.article-content {
line-height: 1.8;
margin-bottom: 30px;
}

.article-content p {
margin-bottom: 15px;
}

.article-content img {
display: block;
max-width: 100%;
height: auto;
margin: 0 auto;
}

/* 文章导航 */
.article-navigation {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 15px;
}

.nav-item {
padding: 10px;
background-color: var(--intro-bg);
border-radius: 5px;
transition: background-color 0.3s ease;
}

.nav-item:hover {
background-color: rgba(211, 47, 47, 0.1);
}

.nav-label {
font-size: 0.9rem;
color: var(--text-light);
margin-bottom: 5px;
}

.nav-title {
font-weight: 500;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}

/* 侧边栏 */
.sidebar {
display: flex;
flex-direction: column;
gap: 30px;
}

.sidebar-section {
background-color: var(--card-bg);
border-radius: 5px;
padding: 20px;
box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.sidebar-title {
font-size: 1.2rem;
margin-bottom: 15px;
padding-bottom: 10px;
border-bottom: 2px solid var(--primary-light);
color: var(--primary-dark);
}

.sidebar-list {
list-style: none;
}

.sidebar-list li {
padding: 8px 0;
border-bottom: 1px solid var(--border-color);
}

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

.sidebar-list a {
color: var(--text-color);
transition: color 0.3s ease;
}

.sidebar-list a:hover {
color: var(--primary-color);
}

/* 页脚样式 */
footer {
background-color: var(--primary-dark);
color: white;
text-align: center;
padding: 20px 0;
margin-top: 50px;
}

footer a {
color: white;
}

footer a:hover {
color: #ffff00;
}

/* 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: 0.3s;
box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
padding: 20px 0;
}

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

.nav-menu li {
margin: 15px 0;
}
}

@media (max-width: 768px) {
.main-content {
grid-template-columns: 1fr;
}

.article-header {
grid-template-columns: 1fr;
text-align: left; /* 修改为左对齐 */
}

.article-thumbnail {
margin: 0 auto 15px; /* 保持图片居中 */
}

.article-meta {
justify-content: flex-start; /* 修改为左对齐 */
}

.article-navigation {
grid-template-columns: 1fr;
}

/* 移动端优化 - 确保内容不会超出屏幕宽度 */
.article-title {
font-size: 1.5rem;
word-wrap: break-word;
overflow-wrap: break-word;
hyphens: auto;
}

.article-intro, .article-content {
width: 100%;
overflow-wrap: break-word;
word-wrap: break-word;
hyphens: auto;
}

.article-content p, .article-intro p {
word-break: break-word;
overflow-wrap: break-word;
}

.sidebar-section {
width: 100%;
box-sizing: border-box;
}

.sidebar-list a {
display: block;
word-wrap: break-word;
overflow-wrap: break-word;
hyphens: auto;
}

.nav-title {
white-space: normal;
word-wrap: break-word;
overflow-wrap: break-word;
}
}

@media (max-width: 500px) {
.article-meta {
flex-direction: column;
align-items: flex-start; /* 修改为左对齐 */
}

.meta-item {
margin-bottom: 5px;
margin-right: 0;
}

.article-title {
font-size: 1.5rem;
}

/* 更小屏幕的额外优化 */
.article-header, .article-intro, .article-content, .article-navigation, .sidebar-section {
padding-left: 10px;
padding-right: 10px;
}

.article-detail {
padding: 15px 10px;
}

.sidebar-section {
padding: 15px 10px;
}
}