/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 全局变量定义 */
:root {
    /* 颜色变量 */
    --primary-color: #142ed8;
    --secondary-color: #E53935;
    --liang-blue: #146bd8;
    --dark-blue: #0D47A1;
    --dark-red: #C62828;
    --text-dark: #333333;
    --text-medium: #666666;
    --text-light: #999999;
    --bg-white: #FFFFFF;
    --bg-light: #F5F5F5;
    --border-color: #E0E0E0;

    /* 字体变量 */
    --font-family: 'Microsoft YaHei', Arial, sans-serif;

    /* 间距变量 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 28px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;

    /* 边框圆角 */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;

    /* 动画时长 */
    --transition-fast: 0.3s;
    --transition-normal: 0.5s;
    --transition-slow: 0.8s;
}

/* 基础样式 */
html {
    scroll-behavior: smooth;
}

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

/* 容器样式 */
.container {
    width: 100%;
    max-width: 1430px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 链接样式 */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast) ease;
}

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

/* 导航栏联系方式样式 */
.contact-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-medium);
    font-size: 16px;
}

.contact-info .separator {
    color: var(--border-color);
    font-size: 18px;
}

.contact-mobile {
    color: #ffffff;
}

.contact-mobile .fa-phone {
    padding-right: 5px;
    padding-top: 3px;
}

.contact-phone,
.contact-mobile,
.contact-email {
    display: flex;
    align-items: center;
    gap: 4px;
}

.contact-phone i,
.contact-email i {
    color: var(--primary-color);
}

/* 移动端联系方式样式 */
.mobile-contact-info {
    padding: var(--spacing-md) var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-sm);
}

.mobile-contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: var(--spacing-sm) 0;
    color: var(--text-medium);
    font-size: 14px;
}

.mobile-contact-item i {
    color: var(--primary-color);
    font-size: 16px;
    min-width: 20px;
    text-align: center;
}

/* 响应式布局 */
@media (max-width: 768px) {

    /* 在移动端隐藏PC端联系方式 */
    .navbar .contact-info {
        display: none;
    }

    .navbar .container {
        height: 60px;
    }
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-fast) ease;
    border: none;
    outline: none;
}

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

.btn-zxly {
    margin-top: var(--spacing-md);
}

.btn-primary:hover {
    background-color: #e27575;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(30, 136, 229, 0.3);
}

.btn-secondary {
    background-color: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(30, 136, 229, 0.3);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* 章节通用样式 */
.section-padding {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.section-divider {
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 0 auto var(--spacing-md);
    border-radius: 2px;
}

.section-description {
    font-size: 16px;
    color: var(--text-medium);
    max-width: 700px;
    margin: 0 auto;
}

/* 淡入动画类 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow) ease, transform var(--transition-slow) ease;
}

.fade-in.active {
    opacity: 1;
    transform: translateY(0);
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0);
    transition: background-color var(--transition-normal) ease, padding var(--transition-normal) ease, box-shadow var(--transition-normal) ease;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255);
    padding: var(--spacing-xs) 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    align-items: center;
    height: 80px;
    flex-direction: row;
    justify-content: space-between;
}

.navbar-brand,
.navbar-brand .logo {
    display: flex;
    align-items: center;
}

.navbar-brand a {
    display: inline-block;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
}

.logo-blue {
    color: var(--primary-color);
}

.logo-text {
    color: var(--text-dark);
}

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

.nav-item {
    margin-left: var(--spacing-lg);
}

.nav-link {
    display: inline-block;
    padding: var(--spacing-xs) 0;
    color: #ffffff;
    font-weight: 500;
    position: relative;
}

/* 滚动后导航链接颜色 */
.navbar.scrolled .nav-link,
.navbar.scrolled .contact-mobile {
    color: var(--text-dark);
}

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

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

.nav-link.active {
    color: var(--secondary-color);
    font-weight: 700;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    cursor: pointer;
    font-size: 24px;
    color: var(--text-dark);
}

/* 移动端侧边菜单 */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: var(--bg-white);
    z-index: 1100;
    transition: right var(--transition-normal) ease;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-md);
}

.mobile-menu.open {
    right: 0;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.mobile-close-btn {
    cursor: pointer;
    font-size: 24px;
    color: var(--text-dark);
}

.mobile-menu-items {
    list-style: none;
}

.mobile-nav-item {
    margin-bottom: var(--spacing-md);
}

.mobile-nav-link {
    display: block;
    padding: var(--spacing-sm) 0;
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
}

.mobile-nav-link.active {
    color: var(--primary-color);
}

/* 英雄区样式 */
.hero-carousel {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-carousel-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    transition: transform 0.5s ease;
}

.hero-carousel-item {
    position: relative;
    width: 100%;
    height: 100%;
    flex-shrink: 0;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
}

.hero-carousel-item1 {
    background-image: url('../img/banner1.jpg');
}

.hero-carousel-item2 {
    background-image: url('../img/banner2.jpg');
}

/* 轮播控制按钮 */
.hero-carousel-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    /* padding: 0 20px; */
    z-index: 10;
}

.carousel-btn {
    width: 60px;
    height: 150px;
    border: 2px solid transparent;
    background-color: transparent;
    color: white;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
}

.prev-btn {
    border-radius: 0 15px 15px 0;
}

.next-btn {
    border-radius: 15px 0 0 15px;
}

.hero-carousel:hover .carousel-btn {
    opacity: 1;
}

.carousel-btn:hover {
    background-color: rgb(21 21 21 / 0.3);
    border-color: rgb(78 78 78 / 0);
}

/* 轮播指示器 */
.hero-carousel-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background-color: white;
    width: 16px;
    border-radius: 6px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
}

.hero-content {
    position: relative;
    z-index: 1;
    color: white;
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-content2 {
    text-align: left;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 1s ease forwards 0.2s;
}

.hero-slogan {
    font-size: 35px;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    color: #ffffff;
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 1s ease forwards 0.4s;
}

.hero-jieshao {
    font-size: 18px;
    font-weight: 500;
    margin-top: 55px;
    margin-bottom: 32px;
    color: #ffffff;
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 1s ease forwards 0.4s;
}

.hero-description {
    font-size: 21px;
    font-weight: 700;
    margin-top: 75px;
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 1s ease forwards 0.6s;
}

.hero-description2 {
    color: #e4a61e;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 1s ease forwards 0.8s;
}

.sc-description {
    position: absolute;
    z-index: 1;
    color: white;
    text-align: center;
    width: 100%;
    margin: 0 auto;
    bottom: 100px;
    font-size: 20px;
}

/* 英雄区动画 */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 产品服务样式 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.service-card {
    background-color: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-normal) ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 80px;
    height: 80px;
    background-color: rgba(30, 136, 229, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 32px;
    color: var(--primary-color);
    transition: all var(--transition-fast) ease;
}

.service-card:hover .service-icon {
    background-color: var(--primary-color);
    color: white;
}

.service-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.service-description {
    color: var(--text-medium);
    margin-bottom: var(--spacing-md);
    min-height: 155px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    font-weight: 500;
    color: var(--primary-color);
}

.service-link i {
    margin-left: var(--spacing-xs);
    transition: transform var(--transition-fast) ease;
}

.service-card:hover .service-link i {
    transform: translateX(5px);
}

/* 公司优势样式 */
.advantages {
    background-color: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.advantage-item {
    text-align: center;
}

.advantage-icon {
    width: 100px;
    height: 100px;
    background-color: rgba(30, 136, 229, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 36px;
    color: var(--primary-color);
    transition: all var(--transition-fast) ease;
}

.advantage-item:hover .advantage-icon {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.advantage-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.advantage-description {
    color: var(--text-medium);
}

/* 客户案例样式 */
.cases-slider {
    position: relative;
    overflow: hidden;
    margin: 0 auto;
}

.cases-track {
    display: flex;
    transition: transform var(--transition-normal) ease;
}

.case-item {
    min-width: 100%;
    padding: 0 var(--spacing-md);
}

.case-item>div {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    background-color: #F5F5F5;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.case-item .case-image {
    flex: 0 0 40%;
    height: auto;
    overflow: hidden;
    border-radius: 12px 12px 0 0;
}

.case-item .case-content {
    border-radius: 0 0 12px 12px;
    background-color: #ffffff;
    border-top: 1px solid #e2e2e2;
}

.case-image img {
    width: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow) ease;
}

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

.case-content {
    flex: 1;
    padding: 15px var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.case-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-dark);
}

.case-description {
    color: var(--text-medium);
    margin-bottom: 5px;
    line-height: 1.7;
}

.case-link {
    display: inline-block;
    font-weight: 500;
    color: var(--primary-color);
    transition: color var(--transition-fast) ease;
}

.case-link:hover {
    color: var(--dark-blue);
}

.case-prev,
.case-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background-color: white;
    border: none;
    border-radius: 50%;
    font-size: 16px;
    color: var(--text-dark);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-fast) ease;
    z-index: 10;
}

.case-prev {
    left: 5px;
}

.case-next {
    right: 5px;
}

.case-prev:hover,
.case-next:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.case-indicators {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-lg);
    gap: var(--spacing-xs);
    height: 15px;
}

.case-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border-color);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast) ease;
}

.case-dot.active,
.case-dot:hover {
    background-color: var(--primary-color);
    transform: scale(1.2);
}

/* 新闻动态样式 */
.news {
    background-color: var(--bg-light);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.news-item {
    background-color: var(--bg-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-normal) ease;
}

.news-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

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

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow) ease;
}

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

.news-content {
    padding: var(--spacing-md);
}

.news-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
    color: var(--text-light);
}

.news-date::before {
    content: '📅';
    margin-right: var(--spacing-xs);
}

/* .news-category::before {
    content: '🏷️';
    margin-right: var(--spacing-xs);
} */

.news-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.news-title a {
    color: var(--text-dark);
    transition: color var(--transition-fast) ease;
}

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

.news-excerpt {
    color: var(--text-medium);
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    display: inline-block;
    font-weight: 500;
    color: var(--primary-color);
    transition: color var(--transition-fast) ease;
}

.news-link:hover {
    color: var(--dark-blue);
}

.news-more {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* 联系方式预览样式 */
.contact-preview {
    background-color: var(--primary-color);
    color: white;
}

.contact-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.contact-description {
    font-size: 18px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
}

.contact-item {
    color: #ffffff;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 18px;
}

.contact-item i {
    font-size: 24px;
}

/* 页脚样式 */
.footer {
    background-color: #1a1a1a;
    color: white;
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
}

.footer-top {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
    margin-left: -12px;
    color: white;
    margin-bottom: var(--spacing-xs);
}

.footer-slogan {
    color: var(--secondary-color);
    font-size: 16px;
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: rgba(255, 255, 255);
    font-size: 14px;
}

.footer-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: white;
}

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

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast) ease;
    font-size: 14px;
}

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

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

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact i {
    margin-top: 5px;
    color: #8091ff;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: all var(--transition-fast) ease;
}

.footer-logo-img {
    width: 170px;
    height: auto;
    display: block;
}

.social-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-privacy {
    display: flex;
    gap: var(--spacing-md);
}

.footer-privacy a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast) ease;
}

.footer-privacy a:hover {
    color: white;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 60px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal) ease;
    z-index: 99;
    box-shadow: 0 4px 10px rgba(30, 136, 229, 0.3);
}

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

.back-to-top:hover {
    background-color: var(--dark-blue);
    transform: translateY(-5px);
}

/* 响应式设计 - 平板 (768px-1024px) */
@media (max-width: 1024px) {

    .services-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-top {
        grid-template-columns: repeat(2, 1fr);
    }

    .case-item>div {
        flex-direction: column;
    }

    .case-item>div {
        flex-direction: column;
    }

    .case-image {
        flex: 0 0 auto;
        width: 100%;
        /* height: 250px !important; */
    }
}

/* 响应式设计 - 移动端 (<768px) */
@media (max-width: 767px) {

    /* 导航栏 */
    .navbar-menu {
        display: none;
    }

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

    /* 英雄区 */
    .hero-carousel {
        min-height: 500px;
        background-attachment: scroll;
    }

    .hero-carousel-item {
        background-attachment: scroll;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-slogan {
        font-size: 20px;
    }

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

    .hero-cta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    /* 产品服务 */
    .services-grid,
    .advantages-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }

    /* 客户案例 */
    .case-image {
        /* height: 140px !important; */
    }

    .case-prev,
    .case-next {
        width: 30px;
        height: 30px;
        font-size: 14px;
    }

    /* 联系方式预览 */
    .contact-info {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    /* 页脚 */
    .footer-top {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    /* 返回顶部按钮 */
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
}

/* 特定的响应式调整 */
@media (max-width: 576px) {
    .section-title {
        font-size: 28px;
    }

    .section-padding {
        padding: var(--spacing-lg) 0;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .btn {
        padding: 10px 20px;
        font-size: 15px;
    }
}