/* 基础样式重置和变量定义 */
:root {
    --primary-color: #2a7fba;
    --primary-dark: #1e5f8b;
    --secondary-color: #4cb050;
    --accent-color: #ff6d00;
    --text-color: #333;
    --text-light: #666;
    --text-lighter: #999;
    --bg-light: #f9f9f9;
    --bg-dark: #222;
    --white: #fff;
    --black: #000;
    --gray: #e0e0e0;
    --gray-dark: #ccc;
    --font-main: 'Noto Sans SC', sans-serif;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --box-shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 62.5%; /* 1rem = 10px */
}

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

/* 排版和容器 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 8rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 6rem;
}

.section-title {
    font-size: 3.6rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    position: relative;
    display: inline-block;
}

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

.section-subtitle {
    font-size: 1.8rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 1.2rem 2.5rem;
    font-size: 1.6rem;
    font-weight: 500;
    text-align: center;
    border-radius: 5px;
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-hover);
}

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

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-hover);
}

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

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

/* 加载动画 */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--white);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s, visibility 0.5s;
}

.loader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.dna-loader {
    position: relative;
    width: 120px;
    height: 60px;
}

.helix {
    position: absolute;
    width: 10px;
    height: 60px;
    background-color: var(--primary-color);
    border-radius: 5px;
    animation: dna-animate 2.5s infinite ease-in-out;
}

.helix:nth-child(1) {
    left: 0;
    animation-delay: 0s;
}

.helix:nth-child(2) {
    left: 55px;
    animation-delay: 0.2s;
}

.helix:nth-child(3) {
    right: 0;
    animation-delay: 0.4s;
}

@keyframes dna-animate {
    0%, 100% {
        transform: translateY(0) scaleY(1);
    }
    50% {
        transform: translateY(20px) scaleY(0.5);
        background-color: var(--secondary-color);
    }
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    padding: 1rem 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 8rem;
}

.logo img {
    height: auto;
    transition: var(--transition);
}

.header.scrolled .logo img {
    height: 40px;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 1rem;
    z-index: 1001;
}

.hamburger {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-color);
    position: relative;
    transition: var(--transition);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
    left: 0;
    transition: var(--transition);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

.nav-toggle.active .hamburger {
    background-color: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    transform: translateY(-8px) rotate(-45deg);
}

.nav-list {
    display: flex;
    list-style: none;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.6rem;
    padding: 1rem 1.5rem;
    margin: 0 0.5rem;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
    transform: translateX(-50%) scaleX(1);
}

.nav-cta {
    margin-left: 2rem;
}

/* 英雄区域 */
.hero {
    padding-top: 15rem;
    padding-bottom: 10rem;
    background: linear-gradient(135deg, rgba(42, 127, 186, 0.1) 0%, rgba(255, 255, 255, 1) 100%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    padding-right: 5rem;
}

.hero-title {
    font-size: 4.8rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.hero-subtitle {
    font-size: 2rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 2rem;
}

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

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    animation: float 6s ease-in-out infinite;
}

.hero-badge {
    position: absolute;
    top: -15px;
    right: -15px;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(255, 109, 0, 0.3);
    animation: pulse 2s infinite;
}

.hero-scroll {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-light);
    font-size: 1.4rem;
    cursor: pointer;
}

.scroll-icon {
    width: 30px;
    height: 50px;
    border: 2px solid var(--text-light);
    border-radius: 15px;
    margin-top: 1rem;
    position: relative;
}

.scroll-icon::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--primary-color);
    border-radius: 50%;
    animation: scroll-down 2s infinite;
}

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

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes scroll-down {
    0% {
        opacity: 1;
        transform: translateY(0) translateX(-50%);
    }
    100% {
        opacity: 0;
        transform: translateY(20px) translateX(-50%);
    }
}

/* 服务特色 */
.features {
    background-color: var(--bg-light);
}

.features .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-top: -8rem;
    position: relative;
    z-index: 2;
}

.feature-card {
    background-color: var(--white);
    padding: 3rem 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-hover);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(42, 127, 186, 0.1);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 2rem;
    transition: var(--transition);
}

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

.feature-icon i {
    font-size: 2.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.feature-card:hover .feature-icon i {
    color: var(--white);
}

.feature-card h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-light);
    font-size: 1.5rem;
}

/* 检测服务 */
.services {
    background-color: var(--white);
}

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

.service-card {
    background-color: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    padding: 3rem;
    text-align: center;
    border: 1px solid var(--gray);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-hover);
    border-color: var(--primary-color);
}

.service-icon {
    margin-bottom: 2rem;
}

.service-card h3 {
    font-size: 2.2rem;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.service-card ul {
    list-style: none;
    text-align: left;
    margin-bottom: 3rem;
}

.service-card ul li {
    padding: 0.8rem 0;
    color: var(--text-light);
    position: relative;
    padding-left: 2.5rem;
}

.service-card ul li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* 技术平台 */
.technology {
    background-color: var(--bg-light);
}

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

.tech-tab-header {
    display: flex;
    border-bottom: 1px solid var(--gray);
    flex-wrap: wrap;
}

.tech-tab-btn {
    flex: 1;
    min-width: 150px;
    padding: 1.5rem 2rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.6rem;
    font-weight: 500;
    color: var(--text-light);
    transition: var(--transition);
    position: relative;
}

.tech-tab-btn::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    transform: scaleX(0);
    transition: var(--transition);
}

.tech-tab-btn.active {
    color: var(--primary-color);
}

.tech-tab-btn.active::after {
    transform: scaleX(1);
}

.tech-tab-content {
    padding: 4rem;
}

.tech-tab-pane {
    display: none;
}

.tech-tab-pane.active {
    display: flex;
    align-items: center;
    gap: 5rem;
}

.tech-content {
    flex: 1;
}

.tech-content h3 {
    font-size: 2.4rem;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.tech-content p {
    margin-bottom: 2rem;
    color: var(--text-light);
    line-height: 1.8;
}

.tech-specs {
    list-style: none;
    margin-top: 3rem;
}

.tech-specs li {
    margin-bottom: 1rem;
    color: var(--text-light);
}

.tech-specs i {
    color: var(--primary-color);
    margin-right: 1rem;
}

.tech-image {
    flex: 1;
}

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

/* 成功案例 */
.case-studies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin-bottom: 6rem;
}

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

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-hover);
}

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

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.case-content {
    padding: 3rem;
}

.case-category {
    display: inline-block;
    background-color: rgba(42, 127, 186, 0.1);
    color: var(--primary-color);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.case-card h3 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.case-card p {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.case-stats {
    display: flex;
    gap: 3rem;
    margin-top: 2rem;
}

.stat-number {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.stat-label {
    font-size: 1.4rem;
    color: var(--text-light);
}

.partners h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--text-light);
}

.partner-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 4rem;
    align-items: center;
}

.partner-logos img {
    height: 40px;
    width: auto;
    opacity: 0.7;
    transition: var(--transition);
    filter: grayscale(100%);
}

.partner-logos img:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* 关于我们 */
.about .container {
    display: flex;
    align-items: center;
    gap: 5rem;
}

.about-content {
    flex: 1;
}

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

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

.about-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 1.5rem 2rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    box-shadow: var(--box-shadow);
}

.about-badge i {
    font-size: 2.5rem;
    margin-right: 1rem;
}

.about-stats {
    display: flex;
    gap: 3rem;
    margin: 3rem 0;
}

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

.stat-number {
    font-size: 3.6rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.6rem;
    color: var(--text-light);
}

/* 联系我们 */
.contact {
    background-color: var(--bg-light);
}

.contact .container {
    display: flex;
    gap: 5rem;
}

.contact-info {
    flex: 1;
}

.contact-info h2 {
    font-size: 3rem;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: 3rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.info-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-right: 2rem;
    margin-top: 0.5rem;
}

.info-item h4 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.contact-form {
    flex: 1;
    background-color: var(--white);
    padding: 4rem;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.contact-form h3 {
    font-size: 2.4rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.form-group {
    margin-bottom: 2rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1.2rem 1.5rem;
    border: 1px solid var(--gray);
    border-radius: 5px;
    font-family: var(--font-main);
    font-size: 1.6rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(42, 127, 186, 0.2);
}

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

/* 页脚 */
.footer {
    background-color: #f5f5f5;
    color: var(--white);
    padding: 6rem 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-col h4 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 1rem;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-col p {
    color: var(--gray-dark);
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

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

.footer-col ul li {
    margin-bottom: 1rem;
}

.footer-col ul li a {
    color: var(--gray-dark);
    text-decoration: none;
    transition: var(--transition);
    font-size: 1.5rem;
}

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

.social-links {
    display: flex;
    gap: 1.5rem;
    margin-top: 2rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: var(--transition);
}

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

.contact-info {
    color: var(--gray-dark);
    font-size: 1.5rem;
}

.newsletter {
    margin-top: 3rem;
}

.newsletter form {
    display: flex;
}

.newsletter input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 5px 0 0 5px;
    font-family: var(--font-main);
    font-size: 1.4rem;
}

.newsletter button {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 0 1.5rem;
    border-radius: 0 5px 5px 0;
    cursor: pointer;
    transition: var(--transition);
}

.newsletter button:hover {
    background-color: var(--primary-dark);
}

.footer-bottom {
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 1.4rem;
    color: var(--gray-dark);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}

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

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

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 3rem;
    right: 3rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    box-shadow: var(--box-shadow);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

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

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container,
    .about .container,
    .contact .container {
        flex-direction: column;
    }
    
    .hero-content,
    .about-content,
    .contact-info {
        padding-right: 0;
        margin-bottom: 5rem;
        text-align: center;
    }
    
    .hero-actions,
    .about-stats {
        justify-content: center;
    }
    
    .tech-tab-pane.active {
        flex-direction: column;
    }
    
    .tech-content,
    .tech-image {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-list {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: var(--transition);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        z-index: 1000;
    }
    
    .nav-list.active {
        right: 0;
    }
    
    .nav-link {
        margin: 1rem 0;
        font-size: 2rem;
    }
    
    .nav-cta {
        margin: 2rem 0 0;
    }
    
    .hero-title {
        font-size: 3.6rem;
    }
    
    .section-title {
        font-size: 3rem;
    }
    
    .about-stats {
        flex-direction: column;
        gap: 2rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .btn {
        width: 100%;
    }
    
    .features .container {
        grid-template-columns: 1fr;
        margin-top: -12rem;
    }
    
    .case-studies {
        grid-template-columns: 1fr;
    }
    
    .tech-tab-header {
        flex-direction: column;
    }
    
    .tech-tab-btn {
        border-bottom: 1px solid var(--gray);
    }
    
    .tech-tab-btn::after {
        display: none;
    }
    
    .tech-tab-content {
        padding: 2rem;
    }
}


/* 基础变量 */
:root {
    --primary-color: #2a7fba;
    --primary-dark: #1e5f8b;
    --secondary-color: #4cb050;
    --accent-color: #ff6d00;
    --text-color: #333;
    --text-light: #666;
    --text-lighter: #999;
    --bg-light: #f9f9f9;
    --white: #fff;
    --gray: #e0e0e0;
    --gray-dark: #ccc;
    --font-main: 'Noto Sans SC', sans-serif;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --box-shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
}

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

/* 服务部分样式 */
.services-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-color);
    position: relative;
    display: inline-block;
}

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

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* 服务网格布局 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

/* 服务卡片样式 */
.service-card {
    background-color: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    padding: 30px;
    text-align: center;
    border: 1px solid var(--gray);
    position: relative;
    z-index: 1;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(42, 127, 186, 0.1) 0%, rgba(255, 255, 255, 0) 100%);
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-hover);
    border-color: var(--primary-color);
}

.service-card:hover::before {
    opacity: 1;
}

.service-icon {
    margin-bottom: 20px;
}

.service-icon img {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.service-title {
    font-size: 22px;
    margin-bottom: 20px;
    color: var(--text-color);
    position: relative;
    padding-bottom: 10px;
}

.service-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

/* 服务特性列表 */
.service-features {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.feature-item {
    padding: 10px 0;
    color: var(--text-light);
    position: relative;
    padding-left: 30px;
    margin-bottom: 8px;
    transition: var(--transition);
}

.feature-item:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.feature-icon {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary-color);
    font-size: 16px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 服务按钮 */
.service-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 25px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    margin-top: 15px;
    border: none;
    cursor: pointer;
}

.service-btn i {
    margin-left: 8px;
    font-size: 14px;
    transition: var(--transition);
}

.service-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-hover);
}

.service-btn:hover i {
    transform: translateX(3px);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 30px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .services-section {
        padding: 60px 0;
    }
}

@media (max-width: 576px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: 25px;
    }
    
    .section-title {
        font-size: 28px;
    }
}