*{
    box-sizing: border-box;
}
a {
    color: inherit;
    text-decoration: none;
    background-color: transparent;
    border: none;
    outline: none;
    cursor: pointer;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    background-color: #ffffff;
    color: #333;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 20px;
}

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

section {
    padding: 50px 0;
}

h1, h2, h3 {
    color: #1a2b4d;
}

h1 {
    font-size: 2.8rem;
}

h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
}

p {
    color: #555;
    line-height: 1.6;
}

/*
 * 头部区域 (Hero Section)
 */
.hero-section {
    height: 572px;
    padding: 135px 0 0;
    position: relative;
    overflow: hidden;
}
.hero-section .title{
    color: #0065BD;
    font-size: 48px;
}
.hero-section .subtitle {
    font-size: 24px;
    color: #606266;
    margin: 20px 0 30px;
}

.btn-primary {
    background-color: #0065BD;
    color: white;
    height: 43px;
    width: 134px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary img {
    width: 18px;
    height: 18px;
}

.btn-primary:hover {
    background-color: #0178df;
}

.features-bar {
    display: flex;
    justify-content: space-around;
    margin-top: 50px;
    background-color: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(3px);
    padding: 20px;
    border-radius: 8px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #606266;
    font-size: 22px;
}

.feature-item img {
    width: 43px;
    height: 43px;
    object-fit: contain;
}

.hero-image {
    width: 100%;
    height: 58px;
    position: fixed;
    top: 0;
    left: 0;
    background-color: rgba(247, 247, 247, 0.6);
    z-index: 99;
    padding: 11px 0;
}
.hero-image img {
    width: 118px;
    height: 36px;
}

.section-title {
    color: #252525;
    font-size: 35px;
}

.section-subtitle {
    color: #606266;
    font-size: 18px;
    margin-top: 10px;
}

/*
 * 核心实力 (Core Strength)
 */
.core-strength {
    background-color: #fff;
}

.strength-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.strength-card {
    background: #ffffff;
    width: 238px;
    height: 302px;
    border: 1px solid #eef2f8;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 0 18px 0 rgba(0,27,123,0.25);
}

.strength-card .card-icon {
    background: linear-gradient( 180deg, rgba(255,255,255,0) 0%, #F3F3F3 100%);
    height: 156px;
}

.strength-card .card-icon img{
    margin-top: 20px;
    width: 151px;
    height: 114px;
    object-fit: contain;
}

.strength-card .card-title {
    color: #252525;
    font-size: 22px;
    font-weight: bold;
    margin-top: 15px;
}

.strength-card .card-text {
    padding: 15px 10px 0;
    font-size: 12px;
    color: #606266;
}

/*
 * 业务需求 (Business Needs)
 */
.business-needs{
    background: #ffffff;
    height: 374px;
    position: relative;
}
.business-needs-bg{
    position: absolute;
    width: 100%;
    height: 316px;
    z-index: 0;
}
.business-needs-bg::after{
    content: "";
    position: absolute;
    width: 100%;
    height: 316px;
    background: rgba(255, 255, 255, 0.4);
    z-index: 1;
}
.business-needs .container {
    position: absolute;
    width: 100%;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-40%);
    z-index: 1;
}
.needs-grid {
    display: flex;
    justify-content: space-around;
    background-color: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(0px);
    border-radius: 8px;
    margin-top: 40px;
}

.need-item {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px 40px;
    color: #252525;
}

.need-item img {
    width: 62px;
    height: 45px;
    object-fit: contain;
    margin-bottom: 10px;
}

/*
 * 产品介绍 (Product Intro)
 */
.product-intro {
    background-color: #fff;
    padding-bottom: 0;
}
.product-tabs{
    margin-top: 30px;
    display: flex;
    justify-content: center;
    gap: 20px;
    height: 100px;
}
.product-tabs .tab{
    width: 120px;
}
.product-tabs .tab img{
    width: 79px;
    height: auto;
    cursor: pointer;
}
.product-tabs .tab.active img{
    width: 82px;
    margin-top: -1px;
}
.product-content {
    width: 714px;
    height: 278px;
    margin: 40px auto 0;
    display: flex;
    align-items: center;
    gap: 50px;
    text-align: left;
    background: #fff;
    padding: 50px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    color: #ffffff;
}

.product-text {
    flex: 1;
}

.product-text .title{
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 10px;
}

.product-text .desc{
    font-size: 9px;
}

.stats {
    display: flex;
    gap: 40px;
    margin: 30px 0;
}

.stats div {
    display: flex;
    flex-direction: column;
}

.stats strong {
    font-size: 14px;
}

.stats span {
    font-size: 10px;
}
.btn-secondary {
    border: 1px solid #ffffff;
    padding: 6px 13px;
    border-radius: 4px;
    font-weight: bold;
    font-size: 13px;
}

/*
 * 全球覆盖 (Global Coverage)
 */
.global-coverage .world-map {
    width: 100%;
    max-width: 900px;
    margin-top: 50px;
}

footer {
    /* background: #F7F7F7;
    text-align: center;
    height: 200px; */
}

@media (min-width: 1440px) {
    .container {
        max-width: 1200px
    }
}

@media (min-width: 2000px) {
    .container {
        max-width: 1560px
    }
    section{
        padding: 80px 0;
    }
    .section-title{
        font-size: 48px;
    }
    .section-subtitle{
        font-size: 24px;
    }
    .hero-image{
        height: 80px;
        padding-top: 15px;
    }
    .hero-image img{
        height: 50px;
        width: 164px;
    }
    .hero-section{
        height: 794px;
        padding-top: 200px;
    }
    .hero-section .title{
        font-size: 58px;
    }
    .hero-section .subtitle{
        margin: 30px auto 45px;
        font-size: 30px;
    }
    .btn-primary {
        height: 60px;
        width: 186px;
        font-size: 22px;
    }
    .btn-primary img{
        width: 24px;
        height: 24px;
    }
    .features-bar{
        margin-top: 80px;
        padding: 27px;
    }
    .feature-item{
        font-size: 30px;
    }
    .feature-item img{
        width: 60px;
        height: 60px;
    }
    .strength-grid{
        margin-top: 80px;
        gap: 50px;
    }
    .strength-card{
        width: 330px;
        height: 419px;
    }
    .strength-card .card-icon{
        height: 217px;
    }
    .strength-card .card-icon img{
        width: 210px;
        height: 158px;
        margin-top: 30px;
    }
    .strength-card .card-title{
        font-size: 30px;
    }
    .strength-card .card-text{
        padding: 22px 22px 0;
        font-size: 16px;
    }

    .business-needs{
        height: 520px;
    }
    .business-needs-bg{
        height: 439px;
    }
    .business-needs-bg::after{
        height: 520px;
    }
    .needs-grid {
        margin-top: 60px;
    }
    .need-item {
        padding: 33px 40px;
        font-size: 24px;
    }
    .need-item img{
        width: 80px;
        height: 70px;
    }
    .product-tabs{
        height: 150px;
        gap: 60px;
        margin-top: 40px;
    }
    .product-tabs .tab.active img{
        width: 116px;
        margin-top: -3px;
    }
    .product-tabs .tab img{
        width: 110px;
    }
    .product-content{
        width: 991px;
        height: 386px;
    }
    .product-text .title{
        font-size: 30px;
    }
    .product-text .desc{
        font-size: 13px;
    }
    .stats strong {
        font-size: 20px;
    }
    .stats span {
        font-size: 14px;
    }
    .btn-secondary {
        font-size: 18px;
        padding: 8px 19px;
    }
    .global-coverage .world-map {
        max-width: 1200px;
        margin-top: 80px;
    }
}