.box1 {
    background-image: url(../img/fb126cf5-8471-408d-94b1-452216041f7e.jpg);
    height: 53vh;
    background-repeat: no-repeat;
    /* 禁止重复 */
    background-size: cover;
    /* 等比铺满，超出裁剪 */
    background-position: center;
    display: flex;
    align-items: center;
    position: relative;
}

.box1::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
}

.box1 h2 {
    color: #ffffff;
    font-size: 44px;
    font-weight: 700;
    z-index: 10;
}

.box1 p {
    color: #ffffff;
    font-size: 22px;
    font-weight: 400;
    margin-top: 9px;
    z-index: 10;
}

.box2 {
    height: 66px;
    background-color: #ffffff;
    line-height: 66px;
    border-bottom: 1px solid #e5e5e5;
}

.box2 .m {
    display: flex;
}

.box2 .m div:nth-child(2) a {
    display: inline-block;
    min-width: 229px;
    font-size: 15px;
    padding: 0px 25px;
    border-right: 1px solid #e5e5e5;
}

.box2 .m div:nth-child(2) a:nth-child(1) {
    display: inline-block;
    min-width: 229px;
    background-color: #005bac;
    color: #ffffff;
}

.box2 .m>div {
    width: 230px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.box2 .m>div a {
    color: #6c757d;
    font-size: 15px;
    font-weight: 400;
}

.box2 .m>div p {
    color: rgb(51, 51, 51);
    font-size: 15px;
    font-weight: 400;
}

.box3 {
    padding: 90px 0;
}

.box3-content {

    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 50px;
}

.box3-item {
    padding: 20px;
    width: calc((100% - 120px) / 5);
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    transition: all 0.3s ease-in-out;
}

.box3-item:hover {
    transform: translateY(-8px);
}

.box3-item img {
    width: 70px;
    height: auto;
}

.box3-item span {
    font-size: 18px;
    font-weight: 400;
}

/* ===== 移动端适配 768px ===== */
@media screen and (max-width: 768px) {
    .box1 {
        height: 30vh;
    }

    .box2 .m>div:nth-child(1) {
        display: none;
    }

    .box2 {
        height: auto;
    }

    .box2 .m {
        margin: 0px;
    }

    .box2 .m .nav {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
    }

    .box2 .m div:nth-child(2) a {
        display: inline-block;
        box-sizing: border-box;
        min-width: 119px;
        font-size: 14px;
        padding: 0px 15px;
        text-align: center;
        border: 1px solid #e5e5e5;
    }

    .box2 .m>div {
        width: 100%;
        display: flex;
        align-items: center;
    }

    .box2 .m div:nth-child(2) a:nth-child(1) {
        display: inline-block;
        box-sizing: border-box;
        min-width: 119px;
        background-color: #005bac;
        color: #ffffff;
    }

    .box3 {
        padding: 30px 0;
    }

    .box3>.m {
        flex-direction: column;
    }

    .box3-left {
        width: 100%;
        margin-top: 0;
        margin-right: 0;
        /* 清除负边距 */
    }

    .box3-left img {
        border-radius: 60px 0 60px 0;
    }

    .box3-right {
        width: 100%;
        padding: 0 0px;
    }

    .box3-right-content {
        padding: 40px 0 0px 0px;
    }

    .box3-right p.f-a {
        font-size: 34px;
    }

    .box3-right-txt p {
        font-size: 16px;
        font-weight: 400;
        color: rgb(85, 85, 85);
        line-height: 32px;
        margin: 28px 0px;
    }

    .box3-right {
        background-color: #ffffff;
    }

    .box3-right-txt {
        margin-top: 120px;
    }

    .box4 .m {
        margin-top: 100px;
        padding: 60px 0px 0px 0px;
    }

    .box4-content {
        display: block;
        width: 100%;
        padding: 64px 48px;
        background-color: rgba(0, 23, 34, 0.9);
        margin-top: 0px;
        border-radius: 100px 0px 100px 0px;
    }

    .box4-left {
        width: 100%;
    }

    .box4-right {
        width: 100%;
    }

    .box3-right-txt .p-big {
        line-height: 28px;

    }

    .box3-item {
        width: 100%;
    }
}