:root {
    --headerBg: #000;
    --mainTitle: linear-gradient(180deg, rgba(236, 169, 64, 1) 0%, rgba(253, 225, 152, 1) 53%, rgba(255, 255, 255, 1) 100%);
    ;
}

body {
    margin: 0;
    box-sizing: border-box;
    font-family: "方正兰亭刊黑_GBK";
    background-color: var(--headerBg);
    background: #eceffb;
}

a {
    text-decoration: none;
}

header {
    /* background-color: var(--headerBg); */
    background: linear-gradient(180deg, #FFF 0%, #fbfcff 0%);
    box-shadow: 0 10px 20px rgba(0, 0, 0, .06);
}

header div {
    display: flex;
    align-items: center;
    text-align: center;
}

header img {
    max-width: 100%;
}

.header-wrap {
    position: relative;
    margin: 0 auto;
    max-width: 1080px;
    display: flex;
}

.header-wrap .header-logo {
    width: 25%;
    padding: 2%;
}

.header-wrap span {
    margin: 2% 0;
    font-size: 2rem;
    padding: 0 2%;
    color: #666;
    border-left: solid 1px rgba(102, 102, 102, .4);
}

.header-wrap .header-btn {
    position: absolute;
    right: 2%;
    height: 100%;
    width: 27%;
}

.header-wrap .header-btn:hover {
    -webkit-filter: brightness(1.2);
    filter: brightness(1.2);
}

.float-icons {
    position: fixed;
    top: 20%;
    right: 1%;
}

.float-icons .float-item {
    display: block;
    margin: 10% 0;
    width: 100px;
    height: 100px;
    background-repeat: no-repeat;
    background-size: contain;
}

.float-icons .btn1 {
    background-image: url(../img/floatBtn-1.png);
}

.float-icons .btn1:hover {
    background-image: url(../img/floatBtn-1_h.png);
}

.float-icons .btn2 {
    background-image: url(../img/floatBtn-2.png);
}

.float-icons .btn2:hover {
    background-image: url(../img/floatBtn-2_h.png);
}

.float-icons .btn3 {
    background-image: url(../img/floatBtn-3.png);
}

.float-icons .btn3:hover {
    background-image: url(../img/floatBtn-3_h.png);
}

.float-icons .btn4 {
    background-image: url(../img/floatBtn-4.png);
}

.float-icons .btn4:hover {
    background-image: url(../img/floatBtn-4_h.png);
}

.float-icons .btn5 {
    background-image: url(../img/floatBtn-5.png);
}

.float-icons .btn5:hover {
    background-image: url(../img/floatBtn-5_h.png);
}

.items-bg {
    /* background: linear-gradient(180deg, rgba(0, 0, 0, 1) 44%, rgba(42, 42, 42, 1) 100%);
    border-top: solid 1px #464646;
    border-bottom: solid 1px #464646; */
}

.item-title {
    display: flex;
    align-items: center;
    justify-content: center;
    /* background: var(--mainTitle); */
    background: linear-gradient(180deg, #00b0ff 50%, #0072ff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-align: center;
    margin-top: 41px;
    font-size: 1.8125rem;
}

.item-title::before {
    content: '';
    background: url(../img/link_L.png) no-repeat right center / contain;
    background-position-x: 100%;
    display: inline-block;
    height: 0.375rem;
    width: 20%;
    margin-right: 10px;
}

.item-title::after {
    content: '';
    background: url(../img/link_R.png) no-repeat left center / contain;
    background-position-x: 0;
    display: inline-block;
    height: 0.375rem;
    width: 20%;
    margin-left: 10px;
}

.item-box {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    max-width: 1080px;
    width: 100%;
    margin: 17px auto;
    margin-bottom: 41px;
    justify-content: flex-start;
    padding: 0;
}

.item {
    box-sizing: border-box;
    background: linear-gradient(180deg, #f6f6f6 0%, #fff 100%);
    box-shadow: 0 4px 8px rgba(151, 164, 171, 0.14);
    width: 23.5%;
    margin: 0.5rem 0.75%;
    height: auto;
    font-size: 1rem;
    border-radius: 1rem;
}

.item:hover {
    /* border: solid 1px #eabb63; */
    text-decoration: none;
    transition: 0.4s;
}

.item span {
    font-size: 0.8rem;
}

.tabUl li .changeVersionButton {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
    padding: 0.5rem 0;
    border-radius: 1rem;
}

.button-title {
    display: flex;
    width: 35%;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    border-radius: 0;
}

.button-title span {
    /* background: var(--mainTitle); */
    background: #333333;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-align: center;
    font-weight: 600;
}

.button-title img {
    display: block;
    margin-bottom: 10%;
}

.button-item {
    width: 60%;
}

.button-item .btn1,
.button-item .btn2 {
    margin: 10px auto;
    width: 80%;
    height: 30%;
    padding: 5px;
    border-radius: 99rem;
    text-align: center;
    transition: all .3s;
}

.button-item .btn1 {
    /* border: solid 1px #eabb63; */
    color: #fff;
    background: linear-gradient(180deg, #336DC1 0%, #074195 100%);
}

.button-item .btn2 {
    /* border: solid 1px #464646; */
    color: #fff;
    background: linear-gradient(180deg, #6ACBFE 0%, #02A8FF 100%);
}

.button-item .btn1:hover {
    /* -webkit-filter: brightness(1.2);
    filter: brightness(1.2);
    color: #000; */
    background: linear-gradient(180deg, #428ED4 0%, #0853B4 100%);
    /* border: solid 1px #eabb63; */
}

.button-item .btn2:hover {
    background: linear-gradient(180deg, #77D6FE 0%, #28C4FE 100%);
}

.tabBox-close {
    z-index: 10;
    position: absolute;
    top: 20px;
    right: 20px;
    cursor: pointer;
}

.tabBox-close img {
    width: 100%;
}

.tabBox-wrap {
    position: absolute;
    top: 0;
    width: 100%;
    height: auto;
    background: rgba(0, 0, 0, .5);
}

.items-img,
.item-img99 {
    display: flex;
    justify-content: center;
    padding: 40px 0;
}

.items-img img,
.item-img99 img {
    max-width: 100%;
}

.item-img99 {
    max-width: 1000px;
    margin: auto;
}

footer {
    background-color: #45b7ff;
}

footer div {
    font-size: 0.875rem;
    font-family: 'Microsoft YaHei UI';
    color: #FFF;
    text-align: center;
    padding: 16px 0;
}

.item-img99 {
    display: none;
}

@media screen and (max-width: 1024px) {
    .float-icons {
        position: fixed;
        top: auto;
        right: auto;
        width: 100dvw;
        height: 100px;
        bottom: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: #f3f5fb;
        box-shadow: 0 -10px 20px rgba(0, 0, 0, .1);
    }

    .float-icons .float-item {
        max-width: 80px;
        max-height: 80px;
        margin: auto 1.5%;
    }

    .item {
        width: 32%;
        margin: 0.5rem 0.5%;
    }

    .tabBox-close {
        width: 1.5rem;
        position: absolute;
        top: 0.5rem;
        right: 0.5rem;
    }
}

@media screen and (max-width: 768px) {
    .header-wrap span {
        font-size: 1.125rem;
    }

    .float-icons {
        height: 85px;
    }

    .float-icons .float-item {
        max-width: 65px;
        max-height: 65px;
        margin: auto 1%;
    }

    .item-title {
        margin-top: 5%;
        font-size: 1.5rem;
    }

    .item {
        width: 30%;
        margin: 0.25rem 0 0.25rem calc(10%/4);
    }

    .tabUl li .changeVersionButton {
        display: flex;
        flex-direction: column;
        padding: 0.125rem 0;
    }

    .button-title,
    .button-item {
        width: 100%;
    }

    .button-title img {
        margin: 5% auto;
        width: 40%;

    }
}