body {
    margin: 0;
    font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
    background: #f5f7fa;
    color: #222;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
header {
    background: #223a5e;
    color: #fff;
    box-shadow: 0 2px 8px rgba(34,58,94,0.05);
}
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}
.logo {
    font-size: 1.8rem;
    font-weight: bold;
    letter-spacing: 2px;
}
nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
}
nav a {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.2s;
}
nav a:hover {
    color: #4fc3f7;
}
.banner {
    background: linear-gradient(120deg, #223a5e 60%, #4fc3f7 100%);
    color: #fff;
    padding: 80px 0 60px 0;
    text-align: center;
}
.banner h1 {
    font-size: 2.8rem;
    margin-bottom: 18px;
    letter-spacing: 2px;
}
.banner p {
    font-size: 1.3rem;
    opacity: 0.9;
}
section {
    padding: 60px 0 40px 0;
}
section h2 {
    font-size: 2rem;
    color: #223a5e;
    margin-bottom: 30px;
    text-align: center;
    letter-spacing: 1px;
}
.about p {
    font-size: 1.1rem;
    line-height: 1.8;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}
.advantages .advantage-list {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
}
.advantage-item {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(34,58,94,0.07);
    padding: 30px 24px;
    flex: 1 1 220px;
    max-width: 260px;
    min-width: 200px;
    text-align: center;
}
.advantage-item h3 {
    color: #4fc3f7;
    margin-bottom: 12px;
}
.process ol {
    max-width: 600px;
    margin: 0 auto;
    padding-left: 20px;
    font-size: 1.1rem;
    color: #223a5e;
}
.partners .partner-logos {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
}
.partner-logo {
    background: #e3eaf2;
    border-radius: 8px;
    padding: 24px 36px;
    font-size: 1.1rem;
    color: #223a5e;
    min-width: 100px;
    text-align: center;
    box-shadow: 0 1px 4px rgba(34,58,94,0.04);
}
.contact p {
    text-align: center;
    font-size: 1.1rem;
    margin: 8px 0;
}
footer {
    background: #223a5e;
    color: #fff;
    text-align: center;
    padding: 18px 0;
    font-size: 0.95rem;
    letter-spacing: 1px;
    margin-top: 30px;
}
/* 响应式导航栏汉堡菜单 */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 40px;
    height: 40px;
    cursor: pointer;
    margin-left: 10px;
}
.nav-toggle span {
    height: 4px;
    width: 28px;
    background: #fff;
    margin: 4px 0;
    border-radius: 2px;
    transition: 0.3s;
}
/* 公司资质与荣誉 */
.certs {
    background: #fff;
    padding: 48px 0 32px 0;
    box-shadow: 0 2px 8px rgba(34,58,94,0.04);
    margin-bottom: 24px;
}
.certs-list {
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 18px;
}
.cert-item {
    text-align: center;
    font-size: 1.08rem;
    color: #223a5e;
    font-weight: 500;
    padding: 18px 24px;
    border-radius: 8px;
    background: #f5f7fa;
    box-shadow: 0 1px 4px rgba(34,58,94,0.04);
    min-width: 120px;
}
.cert-item img {
    border-radius: 8px;
    box-shadow: 0 1px 6px rgba(34,58,94,0.08);
    margin-bottom: 8px;
}
.certs-data {
    display: flex;
    gap: 32px;
    justify-content: center;
    color: #4fc3f7;
    font-weight: bold;
    font-size: 1.1rem;
    margin-bottom: 8px;
}
/* 法律合规板块 */
.compliance {
    background: #e3eaf2;
    padding: 36px 0 20px 0;
    text-align: center;
    margin-bottom: 18px;
}
.compliance p {
    max-width: 700px;
    margin: 0 auto;
    color: #223a5e;
    font-size: 1.05rem;
}
/* 团队介绍 */
.team-list {
    display: flex;
    gap: 36px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 18px;
}
.team-member {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(34,58,94,0.07);
    padding: 24px 18px;
    text-align: center;
    min-width: 120px;
    font-size: 1.05rem;
    color: #223a5e;
    font-weight: 500;
}
.team-member img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin-bottom: 10px;
    object-fit: cover;
}
.team-member p {
    font-size: 1rem;
    color: #223a5e;
    margin: 0;
}
/* 客户评价 */
.testimonials {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 24px;
}
.testimonial-item {
    background: #f5f7fa;
    border-left: 4px solid #4fc3f7;
    border-radius: 8px;
    padding: 18px 20px;
    max-width: 320px;
    font-size: 1rem;
    color: #223a5e;
    box-shadow: 0 1px 4px rgba(34,58,94,0.04);
}
.testimonial-item span {
    display: block;
    margin-top: 10px;
    color: #888;
    font-size: 0.95rem;
}
/* 联系方式额外内容 */
.contact-extra {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 18px;
}
.contact-extra p {
    margin: 8px 0 0 0;
    font-size: 0.98rem;
    color: #223a5e;
}
@media (max-width: 900px) {
    .advantages .advantage-list, .partners .partner-logos {
        flex-direction: column;
        align-items: center;
    }
    .nav-container {
        flex-direction: column;
        height: auto;
        gap: 10px;
    }
    .certs-list, .team-list, .testimonials, .contact-extra {
        flex-direction: column;
        align-items: center;
        gap: 18px;
    }
    .certs-data {
        flex-direction: column;
        gap: 8px;
    }
    .certs-list, .team-list {
        flex-direction: column;
        align-items: center;
        gap: 18px;
    }
}
@media (max-width: 600px) {
    .container {
        padding: 0 8px;
    }
    .nav-container {
        flex-direction: row;
        align-items: center;
        gap: 0;
    }
    nav ul {
        position: absolute;
        top: 60px;
        left: 0;
        width: 100vw;
        background: #223a5e;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        display: none;
        box-shadow: 0 4px 16px rgba(34,58,94,0.08);
        z-index: 99;
    }
    nav ul.open {
        display: flex;
    }
    nav ul li {
        width: 100%;
        border-bottom: 1px solid #2e4a74;
    }
    nav ul li:last-child {
        border-bottom: none;
    }
    nav a {
        display: block;
        width: 100%;
        padding: 16px 20px;
        font-size: 1.1rem;
    }
    .nav-toggle {
        display: flex;
    }
    .banner {
        padding: 48px 0 32px 0;
    }
    .banner h1 {
        font-size: 1.3rem;
        margin-bottom: 10px;
    }
    .banner p {
        font-size: 1rem;
    }
    section h2 {
        font-size: 1.2rem;
        margin-bottom: 18px;
    }
    .about p {
        font-size: 1rem;
        padding: 0 2px;
    }
    .advantage-item {
        padding: 12px 4px;
        font-size: 0.98rem;
        min-width: 0;
        max-width: 100%;
    }
    .partner-logo {
        padding: 10px 2px;
        font-size: 1rem;
        min-width: 0;
    }
    .process ol {
        font-size: 1rem;
        padding-left: 10px;
    }
    footer {
        font-size: 0.85rem;
        padding: 10px 0;
    }
    .certs {
        padding: 24px 0 12px 0;
    }
    .certs-list {
        gap: 10px;
    }
    .cert-item {
        padding: 10px 4px;
        font-size: 0.98rem;
        min-width: 0;
    }
    .cert-item img {
        width: 80px;
        height: 54px;
    }
    .certs-data {
        font-size: 0.98rem;
    }
    .team-member {
        width: 100%;
        padding: 12px 4px;
        font-size: 0.98rem;
    }
    .team-member img {
        width: 60px;
        height: 60px;
    }
    .testimonial-item {
        padding: 12px 8px;
        font-size: 0.98rem;
    }
    .contact-extra {
        gap: 8px;
    }
}
/* 动画效果 */
nav ul, .advantage-item, .partner-logo {
    transition: all 0.3s cubic-bezier(.4,2,.6,1);
}