/* ====================== 全局变量和基础样式 ====================== */
:root {
    /* 颜色变量 */
    --primary-color: #00a86b; /* 新能源主色调 - 绿色 */
    --secondary-color: #0077b6; /* 辅助色 - 蓝色 */
    --accent-color: #ff6b6b; /* 强调色 - 红色 */
    --dark-color: #2c3e50; /* 深色文本 */
    --light-color: #f8f9fa; /* 浅色背景 */
    --gray-color: #6c757d; /* 灰色 */
    --gradient-primary: linear-gradient(135deg, #00a86b 0%, #0077b6 100%);
    --gradient-secondary: linear-gradient(135deg, #20c997 0%, #007bff 100%);
    
    /* 字体变量 */
    --primary-font: 'Segoe UI', 'Roboto', 'Oxygen', sans-serif;
    --heading-font: 'Playfair Display', 'Georgia', serif;
    
    /* 间距变量 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* 阴影和圆角 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 15px 35px rgba(0, 0, 0, 0.25);
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* 过渡效果 */
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--primary-font);
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
    overflow-x: hidden;
}

/* ====================== 排版样式 ====================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--heading-font);
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    color: var(--dark-color);
}

h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.8rem;
    margin-bottom: 1.2rem;
}

h4 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
    font-size: 1rem;
}

/* 段落首字母放大 */
.article-content p:first-of-type::first-letter {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    float: left;
    margin-right: 10px;
    line-height: 1;
}

/* ====================== 容器样式 ====================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ====================== 导航栏样式 ====================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
}

.logo {
    font-family: var(--heading-font);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    font-size: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    font-size: 1rem;
    padding: 0.5rem 0;
    position: relative;
    transition: var(--transition);
}

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

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

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

/* 汉堡菜单样式 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* 移动端菜单 */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: white;
        width: 100%;
        padding: 2rem;
        transition: var(--transition);
        box-shadow: var(--shadow-md);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

/* ====================== 英雄区域样式 ====================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    overflow: hidden;
}

/* 视频背景样式 */
.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: fill;
    z-index: -1;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 2rem;
}

.hero h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.hero p {
    color: white;
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* ====================== 按钮样式 ====================== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--light-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ====================== CTA Section样式 ====================== */
.cta-section {
    background: var(--gradient-primary);
    color: white;
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
    z-index: 1;
}

.cta-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
}

.cta-section h2 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-section p {
    color: white;
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section .btn-primary {
    background: white;
    color: var(--primary-color);
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.cta-section .btn-primary:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
    margin-left: 1rem;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-dark {
    background: var(--dark-color);
    color: white;
}

.btn-dark:hover {
    background: #1a252f;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ====================== 区块样式 ====================== */
.section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.section-subtitle {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
    color: var(--gray-color);
    font-size: 1.1rem;
}

/* ====================== About 页面样式 ====================== */
/* Our Story Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    line-height: 1.6;
    color: var(--gray-color);
}

.about-image img {
    width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

/* Our Mission Section */
.mission-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.mission-image img {
    width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.mission-text h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.mission-text p {
    margin-bottom: 1.5rem;
    line-height: 1.6;
    color: var(--gray-color);
}

.values-list {
    list-style: none;
    padding: 0;
}

.values-list li {
    margin-bottom: 1rem;
    padding-left: 2.5rem;
    position: relative;
    line-height: 1.6;
    color: var(--gray-color);
}

.values-list i {
    position: absolute;
    left: 0;
    top: 0.3rem;
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* Our Team Section */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.team-member {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.team-member img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1.5rem;
    border: 3px solid var(--primary-color);
}

.team-member h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.team-member .member-title {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 500;
}

.team-member p {
    color: var(--gray-color);
    line-height: 1.6;
}

/* Partners Section */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    align-items: center;
    justify-items: center;
    margin-top: 3rem;
}

.partner img {
    max-width: 100%;
    height: auto;
    opacity: 0.7;
    transition: var(--transition);
}

.partner img:hover {
    opacity: 1;
    transform: scale(1.05);
}

/* ====================== 流程步骤样式 ====================== */
.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.process-step {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

.process-step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.process-step h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.process-step p {
    color: var(--gray-color);
    font-size: 0.95rem;
}

/* ====================== 优势网格样式 ====================== */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.benefit-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.benefit-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.benefit-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.benefit-item p {
    color: var(--gray-color);
    font-size: 0.95rem;
}

/* ====================== 网格布局 ====================== */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* ====================== 服务卡片样式 ====================== */
.service-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

/* Article Sections */
.article-section {
    margin-bottom: 4rem;
}



/* ====================== 文章卡片样式 ====================== */
.article-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

/* ====================== 客户评价样式 ====================== */
.testimonials {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.testimonial {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.testimonial:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.testimonial-content {
    position: relative;
    margin-bottom: 2rem;
}

.testimonial-icon {
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.2;
    position: absolute;
    top: -10px;
    left: -10px;
}

.testimonial-content p {
    font-style: italic;
    color: var(--gray-color);
    line-height: 1.6;
    padding-left: 1.5rem;
}

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

.testimonial-author img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 1.5rem;
    border: 3px solid var(--primary-color);
}

.author-info h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.author-info p {
    font-size: 0.9rem;
    color: var(--gray-color);
    margin: 0;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.article-img-container {
    height: 250px;
    overflow: hidden;
}

.article-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

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

.article-content {
    padding: 1.5rem;
}

.article-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.article-title a {
    color: var(--dark-color);
    text-decoration: none;
    transition: var(--transition);
}

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

.article-summary {
    color: var(--gray-color);
    margin-bottom: 1.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    height: 3.6em;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--gray-color);
}

/* ====================== 案例研究样式 ====================== */
.case-study-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.case-study-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.case-study-img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.case-study-content {
    padding: 2rem;
}

/* ====================== 联系页面样式 ====================== */
/* 联系内容布局 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

/* 联系信息部分 */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.contact-info-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.contact-info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.contact-info-item h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.2rem;
    font-weight: 600;
}

.contact-info-item p {
    margin: 0;
    color: var(--gray-color);
    line-height: 1.6;
}

/* 联系表单样式 */
.contact-form-container {
    background-color: #f8f9fa;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.contact-form-container h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.contact-form {
    width: 100%;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* ====================== 页脚样式 ====================== */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    color: white;
    margin-bottom: 1.5rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: #adb5bd;
    text-decoration: none;
    transition: var(--transition);
}

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

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #adb5bd;
}

/* ====================== 动画效果 ====================== */
.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.delay-100 {
    animation-delay: 0.1s;
}

.delay-200 {
    animation-delay: 0.2s;
}

.delay-300 {
    animation-delay: 0.3s;
}

.delay-400 {
    animation-delay: 0.4s;
}

.delay-500 {
    animation-delay: 0.5s;
}

/* ====================== 返回顶部按钮 ====================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 168, 107, 0.3);
}

/* Pagination */
.pagination-container {
    margin-top: 2rem;
}

.pagination-controls {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.pagination-controls .btn {
    margin: 0 0.25rem;
}

.pagination-ellipsis {
    display: flex;
    align-items: center;
    margin: 0 0.25rem;
    font-size: 1.2rem;
    color: #333;
    font-weight: bold;
}

/* ====================== 导航栏滚动效果 ====================== */
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 0.5rem 0;
}

/* 地图容器 */
.map-container {
    margin: 3rem 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* ====================== FAQ手风琴 ====================== */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.faq-item {
    margin-bottom: 1.5rem;
    border-bottom: 1px solid #e9ecef;
}

.faq-question {
    padding: 1rem 0;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-question i {
    font-size: 0.8rem;
    transition: var(--transition);
}

.faq-question i.rotate {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    color: var(--gray-color);
}

.faq-answer.active {
    max-height: 200px;
    padding-bottom: 1rem;
}

/* ====================== 动画效果 ====================== */
.animate-fade-in {
    opacity: 0;
    transition: opacity 0.6s ease;
}

.animate-fade-in.animated {
    opacity: 1;
}

.animate-fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-fade-in-up.animated {
    opacity: 1;
    transform: translateY(0);
}

.animate-slide-in {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-slide-in.animated {
    opacity: 1;
    transform: translateX(0);
}

/* ====================== 响应式设计 ====================== */
@media (max-width: 992px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    /* 在平板设备上保持两列布局 */
    .grid-2,
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    /* 在手机设备上使用更合适的卡片布局 */
    .grid-2,
    .grid-3 {
        grid-template-columns: repeat(2, minmax(150px, 1fr));
        gap: 1rem;
    }
    
    /* 调整卡片内图片大小 */
    .article-img-container {
        height: 140px;
    }
    .article-card img.article-image {
        height: 140px;
    }
    
    .service-card img {
        height: 70px;
        width: 70px;
    }
    
    /* 调整卡片内边距和文字 */
    .article-content {
        padding: 0.8rem;
    }
    
    .article-title {
        font-size: 1rem;
        line-height: 1.2;
        margin-bottom: 0.4rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    .article-summary {
        font-size: 0.75rem;
        line-height: 1.3;
        margin-bottom: 0.5rem;
        display: none;
    }
    
    /* 调整服务卡片样式 */
    .service-card {
        padding: 1rem;
    }
    
    .service-card h3 {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }
    
    .service-card p {
        font-size: 0.8rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .btn {
        margin-bottom: 1rem;
        display: block;
    }
    
    .btn-secondary {
        margin-left: 0;
    }
    
    .pagination-controls {
        flex-wrap: wrap;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* ====================== 筛选按钮样式 ====================== */
.filter-options {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
    padding: 1rem;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.filter-btn {
    padding: 0.8rem 1.5rem;
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.filter-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.filter-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

/* ====================== 其他实用样式 ====================== */
.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0;
}

.mt-0 {
    margin-top: 0;
}

.pt-0 {
    padding-top: 0;
}

.pb-0 {
    padding-bottom: 0;
}

.bg-light {
    background-color: var(--light-color);
}

.bg-white {
    background-color: white;
}