/* 顶部导航样式 */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    height: 100px;
    position: sticky;
    top: 0;
    z-index: 1000;}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0 20px;}

.logo {
    height: 100%;
    display: flex;
    align-items: center;}

.logo img {
    height: 80px;}

.nav-main {
    display: flex;}

.nav-item {
    margin: 0 20px;
    font-size: 16px;
    font-weight: 500;
    position: relative;
    padding-bottom: 5px;}

.nav-item a {
    color: var(--black);
    text-decoration: none;
    transition: color 0.3s;
    display: block;
    padding: 10px 5px;}

.nav-item a:hover, .nav-item a.active {
    color: var(--primary-red);
    font-weight: 700;}

.nav-item a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-red);}

.tools {
    display: flex;
    align-items: center;
    gap: 15px;}

.lang-switch {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 18px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;}

.tool-icon {
    width: 34px;
    height: 34px;
    border: 1px solid var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s;}

.tool-icon:hover {
    background-color: var(--primary-blue);
    color: var(--white);}

/* 下拉菜单 */
.dropdown {
    position: relative;}

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    min-width: 200px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;}

.dropdown:hover .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);}

.dropdown-item {
    padding: 12px 15px;
    border-bottom: 1px solid #eee;}

.dropdown-item:hover {
    background: #f9f9f9;
    color: var(--primary-blue);}


@media (max-width: 768px) {
    .header {
        height: auto;
        padding: 15px 0;}
    
    .header-content {
        flex-direction: column;
        gap: 15px;}
    
    .nav-main {
        flex-wrap: wrap;
        justify-content: center;}
    
    .nav-item {
        margin: 0 10px 10px;
        font-size: 14px;}
}:root {
    --primary-red: #c8102e; /* 西安交大红 */
    --primary-blue: #003366; /* 西安交大蓝 */
    --dark-blue: #002147;
    --light-gray: #f5f5f5;
    --dark-gray: #555;
    --white: #ffffff;
    --black: #333333;}
        
.breadcrumb-container {
    background-color: var(--breadcrumb-bg);
    padding: 20px 0;
    position: relative;
    z-index: 50;
    box-shadow: var(--breadcrumb-shadow);}

.breadcrumb {
    display: flex;
    align-items: center;
    background: var(--white);
    border-radius: 8px;
    padding: 12px 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    font-size: 0.95rem;}

.breadcrumb-path {
    display: flex;
    align-items: center;
    flex-wrap: wrap;}

.breadcrumb a {
    color: var(--dark-gray);
    text-decoration: none;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    padding: 4px 8px;
    border-radius: 4px;}

.breadcrumb a:hover {
    color: var(--primary-red);
    background-color: rgba(0, 0, 0, 0.04);}

.breadcrumb i {
    margin: 0 10px;
    color: rgba(0, 0, 0, 0.2);
    font-size: 0.8rem;}

.breadcrumb a i {
    margin-left: -4px;}

.current-category {
    color: var(--primary-red);
    font-weight: 500;
    display: flex;
    align-items: center;
    padding: 4px 8px;}

.current-category i {
    margin-left: -4px;
    margin-right: 8px;
    color: var(--primary-red);}

.breadcrumb-divider {
    color: #ddd;
    margin: 0 8px;}


        
/* 响应式设计 */

@media (max-width: 768px) {
    /* 面包屑导航响应式 */
    .breadcrumb-path {
        flex-wrap: wrap;}
    
    .breadcrumb-divider {
        display: none;}
}

@media (max-width: 480px) {
    .breadcrumb {
        padding: 10px 15px;}
    
    .breadcrumb a, .current-category {
        padding: 4px 6px;
        font-size: 0.85rem;}
    
    .breadcrumb i {
        margin: 0 6px;}
}/* 文章横幅区域 */
.article-banner {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
    padding: 60px 0 40px;
    position: relative;
    overflow: hidden;}

.article-banner .container {
    position: relative;
    z-index: 2;}

.article-header {
    max-width: 850px;
    margin: 0 auto;}

.article-category {
    background: var(--primary-red);
    display: inline-block;
    padding: 6px 18px;
    font-size: 14px;
    margin-bottom: 20px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;}

.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 25px;
    line-height: 1.2;}

.article-excerpt {
    font-size: 1.2rem;
    line-height: 1.6;
    max-width: 700px;
    margin-bottom: 30px;
    opacity: 0.9;}

/* 文章内容区域 */
.article-content {
    padding: 60px 0;
    background: var(--white);}

.content-container {
    max-width: 850px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;}

.content-container p {
    margin-bottom: 1.8rem;}

.content-container h2 {
    color: var(--primary-blue);
    font-size: 1.8rem;
    margin: 3rem 0 1.5rem;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--light-gray);
    position: relative;}

.content-container h2::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 4px;
    background: var(--primary-red);}

.content-container h3 {
    color: var(--dark-blue);
    font-size: 1.4rem;
    margin: 2.5rem 0 1.2rem;}

.content-container blockquote {
    border-left: 4px solid var(--primary-red);
    padding: 15px 25px;
    background: var(--light-gray);
    margin: 2rem 0;
    font-style: italic;
    border-radius: 0 8px 8px 0;}

.content-container img {
    max-width: 100%;
    height: auto;
    margin: 2rem 0;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);}

.image-caption {
    text-align: center;
    font-size: 0.95rem;
    color: var(--dark-gray);
    margin-top: -1.5rem;
    margin-bottom: 2rem;}

/* 分享区域 */
.share-section {
    padding: 30px 0;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
    margin: 40px 0;}

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

.share-title {
    font-size: 1.2rem;
    font-weight: 500;}

.share-buttons {
    display: flex;
    gap: 12px;}

.share-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--white);
    transition: transform 0.3s;}

.share-btn:hover {
    transform: translateY(-3px);}

.share-wechat { background-color: #2aae67;}
.share-weibo { background-color: #e6162d;}
.share-qq { background-color: #12b7f5;}
.share-link { background-color: var(--dark-gray);}

/* 文章导航 */
.article-navigation {
    display: flex;
    justify-content: space-between;
    margin: 50px 0;}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    width: 45%;
    padding: 20px;
    border-radius: 8px;
    background: var(--white);
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    color: var(--black);
    text-decoration: none;}

.nav-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);}

.nav-btn.prev:hover {
    border-left: 4px solid var(--primary-blue);}

.nav-btn.next:hover {
    border-right: 4px solid var(--primary-blue);}

.nav-icon {
    width: 50px;
    height: 50px;
    background: var(--light-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary-red);
    flex-shrink: 0;}

.nav-text {
    flex-grow: 1;}

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

.nav-title {
    font-weight: 500;
    font-size: 1.1rem;
    color: var(--dark-red);}.footer {
    background-color: #f3f3f3;
    color: #333;
    padding: 60px 0 30px;
    position: relative;
    overflow: visible; /* 修复截断问题 */
    border-top: 1px solid #ddd;
    margin-top: auto;
    box-shadow: 0 -5px 15px rgba(0, 0, 0, 0.05);}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;}

.footer-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 40px;}

.footer-info {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
    width: 100%;}

.footer-logo {
    flex: 0 0 180px;}

.footer-logo img {
    height: 100px;
    max-width: 100%;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));}

.footer-contact-container {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
    flex: 1;
    justify-content: space-around;}

.footer-contact-group {
    display: flex;
    flex-direction: column;
    gap: 30px;}

.footer-contact {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 15px;
    border-radius: 12px;
    transition: all 0.3s ease;}

.footer-contact:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    background: white;}

.footer-contact i {
    font-size: 32px;
    color: #0070a5;
    margin-bottom: 12px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-shadow: 0 2px 3px rgba(0, 0, 0, 0.1);}

.footer-contact p {
    font-size: 15px;
    line-height: 1.4;
    color: #555;
    font-weight: 500;}

.wechat-container {
    position: relative;}

.wechat-hover {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    position: relative;
    padding: 15px;
    border-radius: 12px;
    transition: all 0.3s ease;}

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

.wechat-hover i {
    font-size: 32px;
    color: #0070a5;
    transition: all 0.3s;
    margin-bottom: 10px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-shadow: 0 2px 3px rgba(0, 0, 0, 0.1);}

.wechat-hover:hover i {
    color: #09bb07;
    transform: scale(1.1);}

.wechat-hover p {
    font-size: 15px;
    color: #555;
    line-height: 1.4;
    font-weight: 500;}

.qrcode-popup {
    position: absolute;
    top: -180px; /* 向上弹出，避免被截断 */
    left: 50%;
    transform: translateX(-50%);
    background: white;
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    width: 180px;
    text-align: center;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);}

.qrcode-popup:before {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid white;}

.wechat-container:hover .qrcode-popup {
    opacity: 1;
    visibility: visible;
    top: -200px;}

.qrcode-popup img {
    width: 150px;
    height: 150px;
    display: block;
    margin: 0 auto 10px;}

.qrcode-popup p {
    font-size: 14px;
    color: #666;
    margin: 0;
    font-weight: 600;}

.copyright {
    width: 100%;
    text-align: center;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid #ddd;
    font-size: 14px;
    color: #666;}

.copyright p {
    margin: 8px 0;}
        
        .counter {
            display: inline-block;
            background: linear-gradient(to right, #0070a5, #004e7c);
            color: white;
            padding: 3px 12px;
            border-radius: 20px;
            font-weight: bold;
            margin-left: 5px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);}
        
        @media (max-width: 768px) {
            .footer-row {
                flex-direction: column;
                gap: 40px;}
            
            .footer-info {
                flex-direction: column;
                gap: 40px;}
            
            .footer-contact-container {
                flex-direction: column;
                gap: 30px;}
            
            .footer-contact-group {
                flex-direction: row;
                flex-wrap: wrap;
                justify-content: center;
                gap: 20px;}
            
            .qrcode-popup {
                top: auto;
                bottom: 100%;
                left: 50%;
                transform: translateX(-50%);}
            
            .wechat-container:hover .qrcode-popup {
                top: auto;
                bottom: 130%;}
        }