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

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo-img {
    height: 60px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover,
.nav-link.active {
    color: #2c5aa0;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 语言切换器 */
.language-switcher {
    display: flex;
    gap: 10px;
    margin-left: 20px;
}

.lang-link {
    text-decoration: none;
    color: #666;
    font-size: 14px;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s;
}

.lang-link:hover,
.lang-link.active {
    color: #2c5aa0;
    background: rgba(44, 90, 160, 0.1);
}

/* 页面部分 */
.section {
    display: none;
    min-height: 100vh;
    padding-top: 70px;
}

.section.active {
    display: block;
}

.section-title {
    text-align: center;
    font-size: 36px;
    color: #2c5aa0;
    margin-bottom: 50px;
    padding-top: 50px;
}

/* 首页 */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%);
    z-index: -1;
}

.hero-logo {
    margin-bottom: 30px;
}

.company-logo {
    width: 120px;
    height: 120px;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 20px;
    opacity: 0.9;
}

.hero-description {
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto 40px;
    opacity: 0.8;
}

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

.btn {
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary {
    background: #fff;
    color: #2c5aa0;
}

.btn-primary:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: #fff;
    color: #2c5aa0;
}

.hero-features {
    display: flex;
    gap: 40px;
    margin-top: 50px;
    justify-content: center;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.feature-item img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid white;
}

.feature-item span {
    font-size: 14px;
    font-weight: 500;
}

/* 关于我们 */
.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.intro-with-image {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 40px;
}

.intro-image img {
    width: 100%;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.mission-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    align-items: center;
    margin: 40px 0;
}

.mission-image img {
    width: 100%;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.about-content h3 {
    color: #2c5aa0;
    font-size: 24px;
    margin-bottom: 20px;
    margin-top: 40px;
}

.about-content p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.scope-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 30px 0;
}

.scope-item {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    border-left: 4px solid #2c5aa0;
    text-align: center;
    transition: all 0.3s ease;
}

.scope-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(44, 90, 160, 0.15);
}

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

.scope-icon img {
    width: 80px;
    height: 80px;
    transition: transform 0.3s ease;
}

.scope-item:hover .scope-icon img {
    transform: scale(1.1);
}

.scope-item h4 {
    color: #2c5aa0;
    margin-bottom: 15px;
}

.advantages ul {
    list-style: none;
    padding-left: 0;
}

.advantages li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
}

.advantages li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #2c5aa0;
    font-weight: bold;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.value-item {
    background: #2c5aa0;
    color: white;
    padding: 20px;
    text-align: center;
    border-radius: 10px;
    font-weight: 600;
}/* 服务 */
.
services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background: #fff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.service-image {
    margin-bottom: 20px;
    overflow: hidden;
    border-radius: 10px;
}

.service-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.service-card h3 {
    color: #2c5aa0;
    font-size: 22px;
    margin-bottom: 20px;
}

.service-card p {
    margin-bottom: 20px;
    line-height: 1.7;
}

.service-features h4 {
    color: #333;
    margin: 20px 0 10px;
    font-size: 16px;
}

.service-features ul {
    list-style: none;
    padding-left: 0;
}

.service-features li {
    padding: 5px 0;
    padding-left: 20px;
    position: relative;
}

.service-features li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #2c5aa0;
    font-weight: bold;
}

/* 合作伙伴 */
.partners-intro {
    text-align: center;
    margin-bottom: 50px;
}

.partners-hero-img {
    width: 100%;
    max-width: 800px;
    height: 300px;
    object-fit: cover;
    border-radius: 15px;
    margin-bottom: 20px;
}

.partners-intro p {
    font-size: 18px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.partner-item {
    background: #f8f9fa;
    padding: 40px 20px;
    text-align: center;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    color: #2c5aa0;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

.partner-item:hover {
    background: #2c5aa0;
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(44, 90, 160, 0.2);
}

/* 联系我们 */
.contact-hero {
    text-align: center;
    margin-bottom: 50px;
}

.contact-hero-img {
    width: 100%;
    max-width: 800px;
    height: 300px;
    object-fit: cover;
    border-radius: 15px;
    margin-bottom: 20px;
}

.contact-hero p {
    font-size: 18px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.contact-content {
    max-width: 1200px;
    margin: 50px auto 0;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.contact-item {
    text-align: center;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.contact-icon img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.contact-item h3 {
    color: #2c5aa0;
    margin-bottom: 5px;
    font-size: 18px;
}

.contact-item p {
    font-size: 16px;
    font-weight: 500;
    margin: 0;
}

.contact-item a {
    color: #2c5aa0;
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-map {
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 30px 0;
    margin-top: 50px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.footer-logo-img {
    height: 30px;
    width: auto;
    filter: brightness(0) invert(1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .language-switcher {
        margin-left: 10px;
        gap: 5px;
    }
    
    .lang-link {
        font-size: 12px;
        padding: 3px 6px;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 20px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .intro-with-image,
    .mission-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .scope-grid,
    .services-grid,
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .value-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content h1 {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .service-card,
    .scope-item,
    .contact-item {
        padding: 20px;
    }
    
    .value-grid {
        grid-template-columns: 1fr;
    }
}