/* 全局样式重置和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066ff;
    --secondary-color: #00ccff;
    --accent-color: #36d7b7;
    --dark-color: #1a202c;
    --light-color: #f8f9fa;
    --text-color: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --gray: #f0f2f5;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    overflow-x: hidden;
}

/* 容器样式 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

a:hover {
    color: var(--secondary-color);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.3);
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 102, 255, 0.4);
    color: var(--white);
}

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

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

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.8rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

/* 通用布局类 */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    position: relative;
    display: inline-block;
    margin-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.section-divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 0 auto 20px;
    border-radius: 3px;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
    padding: 20px 0;
}

.navbar.scrolled {
    padding: 15px 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

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

.logo .logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
    max-height: none;
    overflow: visible;
    opacity: 1;
    visibility: visible;
}

.nav-link {
    color: var(--text-color);
    font-weight: 600;
    position: relative;
    padding: 10px 0;
    opacity: 1;
    visibility: visible;
    z-index: 1001;
    font-size: 1rem;
    text-decoration: none;
    display: block;
    line-height: 1.5;
    min-height: 24px;
    white-space: nowrap;
    background: transparent;
    border: none;
    outline: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

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

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

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
    transition: none;
}

/* 消除所有链接和按钮的默认轮廓，提升用户体验 */
a,
button,
input,
textarea {
    outline: none;
}

/* 确保在所有屏幕尺寸下导航菜单正确显示 */
@media (min-width: 769px) {
    .nav-links {
        display: flex !important;
        flex-direction: row;
        max-height: none !important;
        overflow: visible !important;
        opacity: 1 !important;
        visibility: visible !important;
    }
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
}

/* 首页横幅样式 */
.hero {
    position: relative;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 180px 0 120px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(0, 102, 255, 0.1) 0%, transparent 70%);
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-content {
    flex: 1;
    max-width: 500px;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--dark-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 30px;
}

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

.hero-image {
    flex: 1;
    position: relative;
}

.tech-graphic {
    position: relative;
    width: 100%;
    height: 400px;
}

.graphic-element {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0.8;
    animation: float 6s ease-in-out infinite;
}

.graphic-element.element-1 {
    width: 200px;
    height: 200px;
    top: 50px;
    left: 100px;
    background: radial-gradient(circle, var(--primary-color) 0%, var(--secondary-color) 100%);
    box-shadow: 0 0 50px rgba(0, 102, 255, 0.3);
    animation-delay: 0s;
}

.graphic-element.element-2 {
    width: 150px;
    height: 150px;
    top: 150px;
    left: 280px;
    background: radial-gradient(circle, var(--accent-color) 0%, var(--secondary-color) 100%);
    box-shadow: 0 0 40px rgba(54, 215, 183, 0.3);
    animation-delay: 1s;
}

.graphic-element.element-3 {
    width: 100px;
    height: 100px;
    top: 80px;
    left: 400px;
    background: radial-gradient(circle, var(--secondary-color) 0%, var(--primary-color) 100%);
    box-shadow: 0 0 30px rgba(0, 204, 255, 0.3);
    animation-delay: 2s;
}

.graphic-element.element-4 {
    width: 120px;
    height: 120px;
    top: 250px;
    left: 150px;
    background: radial-gradient(circle, var(--primary-color) 0%, var(--accent-color) 100%);
    box-shadow: 0 0 35px rgba(0, 102, 255, 0.2);
    animation-delay: 3s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(10deg);
    }
}

/* 关于我们样式 */
.about {
    padding: 120px 0;
    background-color: var(--white);
}

.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background-color: var(--gray);
    border-radius: 10px;
    transition: var(--transition);
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-text {
    font-size: 1rem;
    color: var(--text-light);
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

/* 产品服务样式 */
.services {
    padding: 120px 0;
    background-color: var(--gray);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background-color: var(--white);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 204, 255, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.service-icon i {
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.service-card:hover .service-icon i {
    color: var(--white);
    transform: scale(1.2);
}

.service-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.service-description {
    color: var(--text-light);
}

/* 技术优势样式 */
.technology {
    padding: 120px 0;
    background-color: var(--white);
}

.tech-advantages {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.tech-item {
    display: flex;
    gap: 20px;
    padding: 30px;
    background-color: var(--gray);
    border-radius: 10px;
    transition: var(--transition);
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    background-color: var(--white);
}

.tech-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.tech-icon i {
    font-size: 1.5rem;
}

.tech-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.tech-stack {
    text-align: center;
}

.tech-stack-title {
    margin-bottom: 30px;
}

.tech-logos {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 20px;
    align-items: center;
}

.tech-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px;
    background-color: var(--gray);
    border-radius: 10px;
    transition: var(--transition);
}

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

.tech-logo i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

/* 客户案例样式 */
.cases {
    padding: 120px 0;
    background-color: var(--dark-color);
    color: var(--white);
}

.cases .section-title,
.cases h3 {
    color: var(--white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.case-card {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-10px);
    background-color: rgba(255, 255, 255, 0.1);
}

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

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

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

.case-info {
    padding: 25px;
}

.case-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.case-description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.case-link {
    color: var(--accent-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

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

.case-link i {
    transition: var(--transition);
}

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

.case-clients {
    text-align: center;
}

.clients-title {
    margin-bottom: 30px;
}

.client-logos {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
}

.client-logo {
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition);
}

.client-logo:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.client-logo i {
    font-size: 2rem;
    color: var(--accent-color);
}

.client-logo span {
    color: var(--white);
    font-weight: 500;
}

/* 团队介绍样式 */
.team {
    padding: 120px 0;
    background-color: var(--white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-member {
    background-color: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.team-member:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.member-image {
    height: 250px;
    overflow: hidden;
}

.member-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.team-member:hover .member-image img {
    transform: scale(1.05);
}

.member-info {
    padding: 25px;
}

.member-name {
    font-size: 1.3rem;
    margin-bottom: 5px;
}

.member-position {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 15px;
}

.member-bio {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 20px;
}

.member-social {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.social-link {
    width: 35px;
    height: 35px;
    background-color: var(--gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    transition: var(--transition);
}

.social-link:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    transform: translateY(-3px);
}

/* 新闻资讯样式 */
.news {
    padding: 120px 0;
    background-color: var(--gray);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.news-card {
    background-color: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

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

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

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

.news-info {
    padding: 25px;
}

.news-date {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.news-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.news-excerpt {
    color: var(--text-light);
    margin-bottom: 20px;
}

.news-link {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

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

.news-link i {
    transition: var(--transition);
}

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

.news-more {
    text-align: center;
}

/* 联系我们样式 */
.contact {
    padding: 120px 0;
    background-color: var(--white);
}

.contact-content {
    display: flex;
    gap: 50px;
}

.contact-info {
    flex: 1;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background-color: var(--gray);
    border-radius: 10px;
    transition: var(--transition);
}

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

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.2rem;
}

.contact-text h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.contact-form {
    flex: 1;
    background-color: var(--gray);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 页脚样式 */
.footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 50px;
    margin-bottom: 60px;
}

.footer-logo .logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--white);
    background: linear-gradient(135deg, var(--white), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    margin-bottom: 20px;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

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

.footer .social-link {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.footer .social-link:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.footer-links h3 {
    color: var(--white);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

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

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-contact h3 {
    color: var(--white);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-contact h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

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

.footer-contact ul li {
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact ul li i {
    color: var(--accent-color);
    margin-top: 5px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright p {
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

.icp-link {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.icp-link:hover {
    color: var(--accent-color);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.3);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 102, 255, 0.4);
}

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

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

.fade-in-up {
    animation: fadeInUp 1s ease forwards;
}

.slide-in-right {
    animation: slideInRight 1s ease forwards;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    html {
        font-size: 15px;
    }
    h1 {
        font-size: 3rem;
    }
    h2 {
        font-size: 2.2rem;
    }
    .services-grid,
    .cases-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .tech-logos {
        grid-template-columns: repeat(4, 1fr);
    }
    .client-logos {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .about-content,
    .contact-content {
        flex-direction: column;
    }
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .tech-advantages {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    .hero-buttons {
        justify-content: center;
    }
    .tech-graphic {
        height: 300px;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 15px 0;
    }
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    }
    .nav-links.active {
        max-height: 400px;
    }
    .nav-links li {
        width: 100%;
        text-align: center;
    }
    .nav-link {
        display: block;
        padding: 15px 0;
    }
    .menu-toggle {
        display: block;
    }
    .services-grid,
    .cases-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    .team-grid {
        grid-template-columns: 1fr;
    }
    .tech-logos {
        grid-template-columns: repeat(2, 1fr);
    }
    .client-logos {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-social {
        justify-content: center;
    }
    .footer-links h3::after,
    .footer-contact h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    .section {
        padding: 80px 0;
    }
    .hero {
        padding: 120px 0 80px;
    }
    h1 {
        font-size: 2.5rem;
    }
    h2 {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    .about-stats {
        grid-template-columns: 1fr;
    }
    .tech-logos,
    .client-logos {
        grid-template-columns: 1fr;
    }
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    .tech-graphic {
        height: 250px;
    }
    .graphic-element.element-1 {
        width: 150px;
        height: 150px;
    }
    .graphic-element.element-2 {
        width: 100px;
        height: 100px;
    }
    .graphic-element.element-3 {
        width: 80px;
        height: 80px;
    }
    .graphic-element.element-4 {
        width: 90px;
        height: 90px;
    }
}

/* 图片懒加载样式 */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lazy-load.loaded {
    opacity: 1;
}

/* 表单提交成功动画 */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.form-submitted {
    animation: pulse 0.5s ease;
}