* {
    font-family: 'Noto Sans SC';
}

img,
svg,
video {
    max-width: 100%;
    display: block;
}

/* ----主体内容----- */
/* 标题栏 */
.title-line>h2 {
    font-weight: bold;
    color: #333;
}

.title-line>h5 {
    margin-top: 25px;
    color: #999;
}

/* banner */
.banner {
    background-color: #187dd5;
    min-height: 500px;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.banner-content {
    display: flex;
    align-items: center;
}

.banner-box {
    display: flex;
}

.banner-title {
    border-bottom: 2px solid #ffffff;
    padding: 10px 0;
    margin-bottom: 30px;
}

.banner-title>h1 {
    color: #fff;
    font-size: 50px;
}

.banner-title>span {
    color: #ffffff90;
    font-size: 24px;
}

.banner-item {
    display: flex;
    user-select: none;
    position: relative;
}

.banner-item>div {
    position: relative;
}

.banner-item>div:after {
    display: block;
    content: '';
    width: 0;
    height: 2px;
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    transition: all 0.3s;
}

.banner-item:hover>div:after {
    width: 100%;
    height: 2px;
    background-color: #fff;
    transition: all 0.3s;
}

.banner-item>img {
    width: 26px;
    height: 24px;
    margin-right: 10px;
}

.banner-item>div {
    color: #fff;
    font-weight: bold;
}

.banner-img {
    min-height: 300px;
    max-width: 740px;
    position: relative;
}

.banner-phone {
    position: absolute;
    bottom: -40px;
    left: 0;
    z-index: 2;
}

.banner-computer {
    position: absolute;
    bottom: -102px;
    left: 100px;
    z-index: 1;
}

.banner-block-1 {
    position: absolute;
    width: 300px;
    height: 300px;
    top: 10px;
    left: -40px;
    background-color: #fff;
    border-radius: 50%;
}

.banner-block-2 {
    position: absolute;
    width: 80px;
    height: 80px;
    top: -20px;
    right: 0;
    background-color: #fff;
    border-radius: 50%;
}

/* 三大特点 对应banner */
.banner-characteristics {
    margin-top: 120px;
}

.banner-characteristics-content {
    display: flex;
    align-items: center;
    justify-content: space-around;
}

.banner-characteristics-item {
    border: none !important;
    min-height: 410px;
    padding: 50px 10px;
    cursor: pointer;
    transition: all 0.3s;
}

.banner-characteristics-item:hover {
    transform: scale(1.05);
    backface-visibility: hidden;
    box-shadow: 0 0 16px -4px #e2e2e2;
}

.banner-characteristics-item:not(hover) {
    transform: scale(1);
    backface-visibility: hidden;
    box-shadow: 0 0 16px -4px #efefef;
}

.banner-characteristics-img {
    display: flex;
    justify-content: center;
}

.banner-characteristics-img>img {
    width: 170px;
    height: 140px;
}

.banner-characteristics-body {
    text-align: center;
}

.banner-characteristics-body>h4 {
    font-weight: 600;
}

/* 移动端数据特色 */
.mobile-features {
    margin-top: 120px;
    padding-top: 60px;
    background-color: #187dd509;
}

.mobile-features-content {
    display: flex;
    align-items: center;
    padding: 40px 0;
}

.mobile-features-text {
    margin-right: 20px;
}

.mobile-features-text>li {
    font-size: 24px;
    margin-bottom: 50px;
    position: relative;
}

.mobile-features-text>li::marker {
    color: #187dd5;
}

.mobile-features-text>li::after {
    display: block;
    content: '';
    width: 0;
    height: 2px;
    position: absolute;
    bottom: -10px;
    left: 0;
    transition: all 0.45s;
}

.mobile-features-text>li:hover:after {
    width: 90%;
    background-color: #187dd5;
}

.mobile-features-img {
    position: relative;
}

/* 智慧校园手机端 */
.oa {
    margin-top: 120px;
}

.oa-content {
    position: relative;
}

/* swiper */
.swiper-content {
    display: flex;
    align-items: center;
    justify-content: space-around;
}

.oa-item {
    min-height: 460px !important;
    background-color: #fff;
    box-shadow: 0 0 12px -3px #cdcdcd60;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border-radius: 6px;
    user-select: none;
}

.oa-item>img {
    max-width: 180px;
}

.oa-pagination span {
    width: 28px;
    border-radius: 6px;
}

/* 智慧校园pc端 */
.oa-pc {
    margin-top: 120px;
}

.oa-pc-nav {
    border-bottom: unset !important;
}

.oa-pc-nav-item {
    display: flex;
    justify-content: center;
    user-select: none;
}

.oa-pc-nav-item>.nav-link {
    border: unset !important;
    padding-bottom: 20px;
    margin-bottom: unset !important;
    font-weight: 600;
    font-size: 30px;
}

.oa-pc-nav-item>.nav-link:hover {
    color: #187dd5;
    transform: color .3s;
}

.oa-pc-nav-item>.nav-link:not(hover) {
    color: #555;
    transform: color .3s
}

.oa-pc-nav-item>.active {
    position: relative;
    color: #187dd5 !important;
}

.oa-pc-nav-item>.active::after {
    display: block;
    content: '';
    width: 70%;
    height: 8px;
    background-color: #187dd5;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.oa-pc-item {
    background-color: #f8f9fe;
}

.oa-pc-item-content {
    min-height: 600px;
    display: flex !important;
    align-items: center;
    justify-content: space-around;
}

.oa-pc-text>h2 {
    font-weight: bold;
    margin-bottom: 30px;
}

.oa-pc-text>div {
    position: relative;
    font-size: 21px;
}

.oa-pc-text>div::before {
    content: '';
    position: absolute;
    top: 8px;
    left: -30px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: #d0dffe;
}

.oa-pc-img {
    width: 600px;
    height: 320px;
    position: relative;
}

.oa-pc-img>img {
    width: 100%;
    height: 100%;
}

.oa-pc-block {
    position: absolute;
    color: #fff;
    background-color: #187dd5;
    padding: 3px 16px;
    border-radius: 30px;
    letter-spacing: 3px;
}

.oa-pc-block1 {
    top: -36px;
    left: 5px;
}

.oa-pc-block2 {
    top: -30px;
    right: 55px;
}

.oa-pc-block3 {
    writing-mode: vertical-rl;
    left: -35px;
    bottom: 0;
    padding: 16px 3px;
}

/* 智慧校园说明 */
.oa-pc-description-item {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 100px 0;
}

.oa-pc-description-text>h2 {
    position: relative;
    font-weight: bold;
    color: #187dd5;
    margin-bottom: 40px;
}

.oa-pc-description-text>h2::before {
    content: '';
    position: absolute;
    top: 14px;
    left: -30px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: #187dd5;
}

.oa-pc-description-text>div {
    font-size: 22px;
}

.oa-pc-description-img {
    display: flex;
    justify-content: center;
    position: relative;
}

.oa-pc-description-img1::before {
    content: '';
    position: absolute;
    bottom: -50px;
    width: 100%;
    height: 16px;
    background: linear-gradient(to right, #fff, #187dd590);
}

.oa-pc-description-img2::before {
    content: '';
    position: absolute;
    bottom: -50px;
    width: 100%;
    height: 16px;
    background: linear-gradient(to left, #fff, #187dd590);
}

.class-plate-swiper .swiper-slide {
    display: flex;
    align-items: center;
    flex-direction: column;
}

.class-plate-swiper .swiper-slide>h2 {
    margin-top: 40px;
}

.class-plate-swiper .swiper-img {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 700px;
}

/* 渐显效果 */
.fade-in {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.5s ease-in-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 首部渐显 */
.fade-in-first {
    animation-name: fade-in;
    animation-duration: .6s;
}

@keyframes fade-in {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}