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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
}

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

.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #1890ff;
    text-decoration: none;
}

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

.menu > li {
    position: relative;
}

.menu > li > a {
    text-decoration: none;
    color: #333;
    font-size: 15px;
    padding: 10px 0;
    display: block;
}

.menu > li:hover > a {
    color: #1890ff;
}

.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border-radius: 4px;
    min-width: 200px;
    list-style: none;
    z-index: 100;
}

.menu > li:hover > .submenu {
    display: block;
}

.submenu li a {
    display: block;
    padding: 10px 20px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
}

.submenu li a:hover {
    background: #f5f5f5;
    color: #1890ff;
}

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 150px 0 80px;
    text-align: center;
}

.hero-title {
    font-size: 42px;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 18px;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto 50px;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 40px;
}

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

.stat-number {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 16px;
    opacity: 0.9;
}

.section-title {
    font-size: 32px;
    text-align: center;
    margin-bottom: 40px;
    color: #333;
}

.services {
    padding: 80px 0;
    background: #f8f9fa;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s;
}

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

.service-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.service-title {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
}

.service-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

.cases {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-subtitle {
    color: #666;
    font-size: 15px;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

@media (max-width: 768px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.case-card {
    background: #f8f9fa;
    border-radius: 8px;
    overflow: hidden;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-card:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 20px 45px rgba(102, 126, 234, 0.25);
}

.case-image {
    width: 100%;
    padding-bottom: 97.8%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    position: relative;
    overflow: hidden;
}

.case-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #fff;
}

.case-title {
    padding: 15px;
    font-size: 14px;
    color: #333;
    text-align: center;
    line-height: 1.5;
}

.articles {
    padding: 80px 0;
    background: #f8f9fa;
}

.articles-list {
    max-width: 800px;
    margin: 0 auto;
}

.article-item {
    background: #fff;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.article-item:hover {
    transform: translateX(5px);
}

.article-item a {
    text-decoration: none;
    color: inherit;
    display: block;
}

.article-title {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
}

.article-summary {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.about {
    padding: 80px 0;
    background: #fff;
}

.about-subtitle {
    text-align: center;
    font-size: 16px;
    color: #666;
    margin-bottom: 50px;
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.client-item {
    aspect-ratio: 1;
    background: #f0f0f0;
    border-radius: 8px;
}

.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 30px;
    text-align: center;
}

.contact {
    margin-bottom: 40px;
}

.contact-title {
    font-size: 20px;
    margin-bottom: 20px;
}

.qrcode {
    width: 150px;
    height: 150px;
    background: #fff;
    margin: 0 auto;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    overflow: hidden;
}
.qrcode img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.copyright {
    font-size: 14px;
    opacity: 0.7;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        height: auto;
        padding: 8px 0;
    }

    .menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-title {
        font-size: 28px;
    }

    .stats {
        gap: 20px;
    }

    .stat-number {
        font-size: 28px;
    }

    .section-title {
        font-size: 26px;
    }

    .clients-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}