:root {
--primary-color: #F75000;
--text-color: #333;
--light-gray: #f5f5f5;
--border-color: #e0e0e0;
}

* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Helvetica Neue', Arial, sans-serif;
}

body {
color: var(--text-color);
line-height: 1.6;
max-width: 100%;
overflow-x: hidden;
}

a {
text-decoration: none;
color: inherit;
transition: all 0.3s ease;
}

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

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

nav {
display: flex;
justify-content: space-between;
align-items: center;
padding: 15px 0;
}

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

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

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

/* PC端导航栏悬停特效 */
.nav-links a {
padding: 5px 0;
position: relative;
}

.nav-links a::after {
content: '';
position: absolute;
width: 0;
height: 2px;
bottom: 0;
left: 0;
background-color: var(--primary-color);
transition: width 0.3s ease;
}

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

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

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

/* 面包屑导航 */
.breadcrumb {
padding: 15px 0;
font-size: 0.9rem;
color: #666;
}

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

/* 主内容区布局 */
.main-content {
display: flex;
gap: 30px;
margin: 30px 0;
}

.left-column {
flex: 7;
}

.right-column {
flex: 3;
}

/* 文章头部信息 */
.article-header {
display: flex;
margin-bottom: 20px;
align-items: flex-start;
}

.article-thumb {
flex: 0 0 100px;
height: 100px;
border-radius: 5px;
overflow: hidden;
margin-right: 20px;
}

.article-thumb img {
width: 100%;
height: 100%;
object-fit: cover;
}

.article-info {
flex: 1;
}

.article-title {
font-size: 1.8rem;
font-weight: bold;
margin-bottom: 10px;
line-height: 1.3;
}

.article-meta {
display: flex;
gap: 15px;
color: #888;
font-size: 0.9rem;
}

/* 导读区域 */
.article-intro {
background-color: var(--light-gray);
padding: 20px;
border-radius: 5px;
margin-bottom: 20px;
font-style: italic;
border-left: 3px solid var(--primary-color);
}

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

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

.article-content h2, 
.article-content h3 {
margin: 25px 0 15px;
color: var(--primary-color);
}

.article-content img {
max-width: 100%;
height: auto;
border-radius: 5px;
margin: 15px 0;
}

.article-content blockquote {
border-left: 3px solid var(--primary-color);
padding-left: 15px;
margin: 20px 0;
color: #666;
font-style: italic;
}

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

/* 文章导航 */
.article-navigation {
display: flex;
justify-content: space-between;
border-top: 1px solid var(--border-color);
padding-top: 20px;
margin-top: 30px;
}

.nav-previous, 
.nav-next {
flex: 1;
padding: 15px;
border-radius: 5px;
transition: background-color 0.3s ease;
}

.nav-previous {
text-align: left;
margin-right: 10px;
}

.nav-next {
text-align: right;
margin-left: 10px;
}

.nav-previous:hover, 
.nav-next:hover {
background-color: var(--light-gray);
}

.nav-label {
font-size: 0.9rem;
color: #888;
margin-bottom: 5px;
}

.nav-title {
font-weight: 500;
display: -webkit-box;
-webkit-line-clamp: 1;
-webkit-box-orient: vertical;
overflow: hidden;
}

/* 侧边栏文章列表 */
.sidebar-section {
margin-bottom: 30px;
}

.sidebar-title {
font-size: 1.2rem;
margin-bottom: 15px;
padding-bottom: 5px;
border-bottom: 2px solid var(--primary-color);
color: var(--primary-color);
}

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

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

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

.sidebar-list a {
display: block;
transition: color 0.3s ease;
}

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

/* 页脚 */
footer {
background-color: #333;
color: white;
text-align: center;
padding: 20px 0;
margin-top: 50px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
.nav-links {
display: none;
flex-direction: column;
position: absolute;
top: 100%;
left: 0;
right: 0;
background-color: white;
box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
padding: 20px;
}

.nav-links.active {
display: flex;
}

.nav-links li {
margin: 10px 0;
}

.nav-toggle {
display: block;
}

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

.copyright {
display: none;
}
}

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

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

.article-thumb {
width: 100%;
height: auto;
aspect-ratio: 16/9;
margin-right: 0;
margin-bottom: 15px;
}

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

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

.nav-previous, 
.nav-next {
margin: 5px 0;
text-align: left;
}
}

@media (max-width: 500px) {
.article-title {
font-size: 1.3rem;
}
}