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

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: #333;
    line-height: 1.7;
    background: #fff;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: #fff;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo h1 {
    font-size: 20px;
    color: #1a3a6c;
    font-weight: 600;
}

.logo-en {
    display: block;
    font-size: 11px;
    color: #999;
    letter-spacing: 2px;
    margin-top: 2px;
}

.nav a {
    margin-left: 32px;
    font-size: 15px;
    color: #555;
    transition: color 0.2s;
}

.nav a:hover {
    color: #1a3a6c;
}

/* Banner */
.banner {
    background: linear-gradient(135deg, #1a3a6c 0%, #2c5aa0 100%);
    color: #fff;
    padding: 120px 0;
    text-align: center;
}

.banner-title {
    font-size: 42px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.banner-desc {
    font-size: 18px;
    opacity: 0.9;
    letter-spacing: 1px;
}

/* Section */
.section {
    padding: 80px 0;
}

.section-gray {
    background: #f7f9fc;
}

.section-title {
    text-align: center;
    font-size: 32px;
    color: #1a3a6c;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-line {
    width: 50px;
    height: 3px;
    background: #2c5aa0;
    margin: 0 auto 50px;
}

/* About */
.about-content {
    max-width: 900px;
    margin: 0 auto;
    font-size: 16px;
    color: #555;
}

.about-content p {
    margin-bottom: 18px;
    text-indent: 2em;
}

/* Service */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.service-card {
    background: #fff;
    padding: 36px 28px;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(26, 58, 108, 0.12);
}

.service-card h3 {
    font-size: 18px;
    color: #1a3a6c;
    margin-bottom: 14px;
    font-weight: 600;
}

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

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-item {
    text-align: center;
    padding: 30px 20px;
    border: 1px solid #e8eef5;
    border-radius: 8px;
}

.contact-item h3 {
    font-size: 16px;
    color: #1a3a6c;
    margin-bottom: 12px;
    font-weight: 600;
}

.contact-item p {
    font-size: 14px;
    color: #666;
}

/* Footer */
.footer {
    background: #1a3a6c;
    color: #ccd5e1;
    text-align: center;
    padding: 30px 0;
    font-size: 14px;
}

.footer p {
    margin: 6px 0;
}

.footer a {
    color: #ccd5e1;
    transition: color 0.2s;
}

.footer a:hover {
    color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        height: auto;
        padding: 16px 0;
    }

    .logo h1 {
        font-size: 16px;
        text-align: center;
    }

    .nav {
        margin-top: 12px;
    }

    .nav a {
        margin: 0 10px;
        font-size: 14px;
    }

    .banner {
        padding: 70px 0;
    }

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

    .banner-desc {
        font-size: 14px;
    }

    .section {
        padding: 50px 0;
    }

    .section-title {
        font-size: 24px;
    }
}