/* ZBlog SEO优化主题 - 主样式表 */
/* 作者：Matrix Agent */

/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333333;
    background-color: #ffffff;
}

a {
    text-decoration: none;
    color: #0066cc;
    transition: color 0.3s ease;
}

a:hover {
    color: #004499;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* ===== 工具类 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    color: #1a1a1a;
    margin-bottom: 15px;
    font-weight: 700;
}

.section-title p {
    font-size: 18px;
    color: #666666;
    max-width: 600px;
    margin: 0 auto;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background-color: #0066cc;
    color: #ffffff;
}

.btn-primary:hover {
    background-color: #0052a3;
    color: #ffffff;
}

.btn-secondary {
    background-color: transparent;
    color: #0066cc;
    border: 2px solid #0066cc;
}

.btn-secondary:hover {
    background-color: #0066cc;
    color: #ffffff;
}

/* ===== 顶部导航 ===== */
.header {
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 50px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: #1a1a1a;
}

.logo-text span {
    color: #0066cc;
}

.nav-menu {
    display: flex;
    gap: 35px;
}

.nav-menu a {
    font-size: 16px;
    color: #333333;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #0066cc;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #0066cc;
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: #333333;
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* ===== 横幅区域 ===== */
.hero {
    background: linear-gradient(135deg, #0066cc 0%, #004499 100%);
    color: #ffffff;
    padding: 180px 0 120px;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.hero-buttons .btn {
    min-width: 180px;
}

.hero-buttons .btn-primary {
    background-color: #ffffff;
    color: #0066cc;
}

.hero-buttons .btn-primary:hover {
    background-color: #f0f0f0;
}

.hero-buttons .btn-secondary {
    border-color: #ffffff;
    color: #ffffff;
}

.hero-buttons .btn-secondary:hover {
    background-color: #ffffff;
    color: #0066cc;
}

/* ===== 服务内容模块 ===== */
.services {
    background-color: #f8f9fa;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: #ffffff;
    border-radius: 10px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background-color: #e6f2ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon svg {
    width: 40px;
    height: 40px;
    fill: #0066cc;
}

.service-card h3 {
    font-size: 22px;
    color: #1a1a1a;
    margin-bottom: 15px;
}

.service-card p {
    color: #666666;
    margin-bottom: 20px;
    line-height: 1.8;
}

.service-card .btn {
    font-size: 14px;
    padding: 10px 25px;
}

/* ===== 服务优势模块 ===== */
.advantages {
    background-color: #ffffff;
}

.advantages-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.advantages-text h3 {
    font-size: 28px;
    color: #1a1a1a;
    margin-bottom: 20px;
}

.advantages-text p {
    color: #666666;
    margin-bottom: 30px;
    line-height: 1.8;
}

.advantage-list {
    margin-bottom: 30px;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
}

.advantage-item svg {
    width: 24px;
    height: 24px;
    fill: #28a745;
    flex-shrink: 0;
    margin-top: 3px;
}

.advantage-item h4 {
    font-size: 18px;
    color: #1a1a1a;
    margin-bottom: 5px;
}

.advantage-item p {
    color: #666666;
    font-size: 14px;
    margin: 0;
}

.advantages-image {
    position: relative;
}

.advantages-image img {
    border-radius: 10px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.advantages-image::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 200px;
    height: 200px;
    background-color: #e6f2ff;
    border-radius: 50%;
    z-index: -1;
}

/* ===== 关于我们模块 ===== */
.about {
    background-color: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: 10px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.about-image::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: -20px;
    width: 200px;
    height: 200px;
    background-color: #0066cc;
    border-radius: 50%;
    opacity: 0.1;
    z-index: -1;
}

.about-text h3 {
    font-size: 28px;
    color: #1a1a1a;
    margin-bottom: 20px;
}

.about-text p {
    color: #666666;
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background-color: #ffffff;
    border-radius: 10px;
}

.stat-item h4 {
    font-size: 36px;
    color: #0066cc;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-item p {
    color: #666666;
    font-size: 14px;
    margin: 0;
}

/* ===== 产品案例模块 ===== */
.cases {
    background-color: #ffffff;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background-color: #ffffff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.case-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.05);
}

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    display: flex;
    align-items: flex-end;
    padding: 20px;
}

.case-card:hover .case-overlay {
    opacity: 1;
}

.case-overlay .btn {
    background-color: #ffffff;
    color: #0066cc;
}

.case-content {
    padding: 25px;
}

.case-content span {
    display: inline-block;
    padding: 5px 12px;
    background-color: #e6f2ff;
    color: #0066cc;
    font-size: 12px;
    border-radius: 3px;
    margin-bottom: 10px;
}

.case-content h3 {
    font-size: 20px;
    color: #1a1a1a;
    margin-bottom: 10px;
}

.case-content p {
    color: #666666;
    font-size: 14px;
    line-height: 1.6;
}

/* ===== 新闻资讯模块 ===== */
.news {
    background-color: #f8f9fa;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.news-card {
    background-color: #ffffff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.news-image {
    height: 200px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-content {
    padding: 25px;
}

.news-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
    font-size: 13px;
    color: #999999;
}

.news-content h3 {
    font-size: 18px;
    color: #1a1a1a;
    margin-bottom: 10px;
    line-height: 1.4;
}

.news-content p {
    color: #666666;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 15px;
}

.news-content .btn {
    font-size: 14px;
    padding: 8px 20px;
}

/* ===== 常见问题模块 ===== */
.faq {
    background-color: #ffffff;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 15px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    background-color: #ffffff;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: #f8f9fa;
}

.faq-question h4 {
    font-size: 16px;
    color: #1a1a1a;
    font-weight: 500;
}

.faq-question svg {
    width: 20px;
    height: 20px;
    fill: #666666;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 25px 20px;
}

.faq-answer p {
    color: #666666;
    line-height: 1.8;
}

/* ===== 客户评价模块 ===== */
.testimonials {
    background-color: #f8f9fa;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background-color: #ffffff;
    border-radius: 10px;
    padding: 35px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 25px;
    font-size: 60px;
    color: #0066cc;
    opacity: 0.2;
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-content {
    position: relative;
    z-index: 1;
}

.testimonial-content p {
    color: #666666;
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 25px;
    font-style: italic;
}

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

.testimonial-author img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.testimonial-author h5 {
    font-size: 16px;
    color: #1a1a1a;
    margin-bottom: 3px;
}

.testimonial-author span {
    font-size: 13px;
    color: #999999;
}

.testimonial-rating {
    margin-bottom: 15px;
    color: #ffc107;
    font-size: 14px;
}

/* ===== 联系我们模块 ===== */
.contact {
    background-color: #ffffff;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 28px;
    color: #1a1a1a;
    margin-bottom: 20px;
}

.contact-info p {
    color: #666666;
    margin-bottom: 30px;
    line-height: 1.8;
}

.contact-details {
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-item svg {
    width: 24px;
    height: 24px;
    fill: #0066cc;
    flex-shrink: 0;
    margin-top: 3px;
}

.contact-item h4 {
    font-size: 16px;
    color: #1a1a1a;
    margin-bottom: 3px;
}

.contact-item p {
    color: #666666;
    font-size: 14px;
    margin: 0;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: #0066cc;
}

.social-links a svg {
    width: 20px;
    height: 20px;
    fill: #666666;
}

.social-links a:hover svg {
    fill: #ffffff;
}

.contact-form {
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 10px;
}

.contact-form h3 {
    font-size: 24px;
    color: #1a1a1a;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    color: #333333;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e0e0e0;
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #0066cc;
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form .btn {
    width: 100%;
}

/* ===== 友情链接模块 ===== */
.friendly-links {
    background-color: #f8f9fa;
    padding: 60px 0;
}

.friendly-links h3 {
    text-align: center;
    font-size: 24px;
    color: #1a1a1a;
    margin-bottom: 30px;
}

.links-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.links-list a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 25px;
    background-color: #ffffff;
    border-radius: 5px;
    color: #666666;
    font-size: 14px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.links-list a:hover {
    background-color: #0066cc;
    color: #ffffff;
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0, 102, 204, 0.2);
}

/* ===== 页脚 ===== */
.footer {
    background-color: #1a1a1a;
    color: #ffffff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    color: #ffffff;
    margin-bottom: 25px;
    position: relative;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: #0066cc;
}

.footer-section p {
    color: #999999;
    font-size: 14px;
    line-height: 1.8;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: #999999;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #0066cc;
}

.footer-bottom {
    border-top: 1px solid #333333;
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: #666666;
    font-size: 14px;
}

.footer-bottom a {
    color: #0066cc;
}

/* ===== 分页样式 ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 5px;
    background-color: #ffffff;
    color: #666666;
    font-size: 14px;
    transition: all 0.3s ease;
    border: 1px solid #e0e0e0;
}

.pagination a:hover,
.pagination .current {
    background-color: #0066cc;
    color: #ffffff;
    border-color: #0066cc;
}

/* ===== 文章详情页 ===== */
.article-header {
    background: linear-gradient(135deg, #0066cc 0%, #004499 100%);
    color: #ffffff;
    padding: 150px 0 60px;
    text-align: center;
}

.article-header h1 {
    font-size: 36px;
    margin-bottom: 20px;
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 30px;
    font-size: 14px;
    opacity: 0.9;
}

.article-content {
    padding: 60px 0;
}

.article-content .container {
    max-width: 800px;
}

.article-content h2 {
    font-size: 28px;
    color: #1a1a1a;
    margin: 40px 0 20px;
}

.article-content h3 {
    font-size: 22px;
    color: #1a1a1a;
    margin: 30px 0 15px;
}

.article-content p {
    color: #666666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
    margin: 20px 0;
    padding-left: 30px;
}

.article-content ul {
    list-style: disc;
}

.article-content ol {
    list-style: decimal;
}

.article-content li {
    color: #666666;
    line-height: 1.8;
    margin-bottom: 10px;
}

/* ===== 面包屑导航 ===== */
.breadcrumb {
    padding: 20px 0;
    background-color: #f8f9fa;
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #666666;
}

.breadcrumb a {
    color: #666666;
}

.breadcrumb a:hover {
    color: #0066cc;
}

.breadcrumb span {
    color: #999999;
}

/* ===== 响应式设计 ===== */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 38px;
    }

    .advantages-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .advantages-image,
    .about-image {
        order: -1;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: #ffffff;
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }

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

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        padding: 150px 0 80px;
    }

    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .section {
        padding: 60px 0;
    }

    .section-title h2 {
        font-size: 28px;
    }

    .cases-grid,
    .news-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .stat-item {
        padding: 15px 10px;
    }

    .stat-item h4 {
        font-size: 24px;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 25px;
    }

    .footer {
        padding: 40px 0 20px;
    }
}

/* ===== 动画效果 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ===== 页面标题样式 ===== */
.page-header {
    background: linear-gradient(135deg, #0066cc 0%, #004499 100%);
    color: #ffffff;
    padding: 150px 0 60px;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 服务详情页 ===== */
.service-detail {
    padding: 60px 0;
}

.service-detail h2 {
    font-size: 28px;
    color: #1a1a1a;
    margin: 40px 0 20px;
}

.service-detail p {
    color: #666666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.service-features {
    margin: 40px 0;
}

.service-feature-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    padding: 25px;
    background-color: #f8f9fa;
    border-radius: 10px;
}

.service-feature-icon {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    background-color: #e6f2ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-feature-icon svg {
    width: 30px;
    height: 30px;
    fill: #0066cc;
}

.service-feature-item h4 {
    font-size: 20px;
    color: #1a1a1a;
    margin-bottom: 10px;
}

.service-feature-item p {
    color: #666666;
    margin: 0;
}

/* ===== 案例详情页 ===== */
.case-detail {
    padding: 60px 0;
}

.case-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.case-gallery img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.case-info-content h2 {
    font-size: 28px;
    color: #1a1a1a;
    margin-bottom: 20px;
}

.case-meta {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 25px;
}

.case-meta-item {
    display: flex;
    gap: 10px;
}

.case-meta-item span:first-child {
    color: #999999;
    min-width: 80px;
}

.case-meta-item span:last-child {
    color: #333333;
}

.case-description {
    color: #666666;
    line-height: 1.8;
}

/* ===== SEO优化特定样式 ===== */
.seo-score {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: linear-gradient(135deg, #0066cc 0%, #004499 100%);
    border-radius: 10px;
    color: #ffffff;
    margin-bottom: 30px;
}

.seo-score-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
}

.seo-score h4 {
    font-size: 20px;
    margin-bottom: 5px;
}

.seo-score p {
    font-size: 14px;
    opacity: 0.9;
    margin: 0;
}

/* ===== 表格样式 ===== */
.table-responsive {
    overflow-x: auto;
    margin: 20px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 15px;
    text-align: left;
    border: 1px solid #e0e0e0;
}

table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #1a1a1a;
}

table td {
    color: #666666;
}

/* ===== 标签样式 ===== */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.tag {
    display: inline-block;
    padding: 5px 15px;
    background-color: #e6f2ff;
    color: #0066cc;
    font-size: 13px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.tag:hover {
    background-color: #0066cc;
    color: #ffffff;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: #0066cc;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 102, 204, 0.3);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    fill: #ffffff;
}

.back-to-top:hover {
    background-color: #0052a3;
    transform: translateY(-3px);
}