/* 初始化样式 */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


/* 头部样式 */

.header {
    position: relative;
    width: 100%;
    height: 100vh;
    background: linear-gradient(45deg, rgba(186, 216, 254) 0%, rgba(231, 240, 254) 60%, rgba(231, 240, 254) 40%);
    display: flex;
    align-items: center;
    padding: 0 12%;
    overflow: hidden;
}

.logo {
    position: absolute;
    top: 1vh;
    left: 12%;
    width: 14vw;
    height: auto;
    z-index: 1;
}

.logo-container {
    display: none;
}

.logo-pc {
    position: absolute;
    width: 18vw;
    height: auto;
    top: 10px;
}

.toggle-btn {
    display: none;
}

.media-nav {
    display: none;
}

.side-panel {
    display: none;
}

.building-bg {
    position: absolute;
    width: 57%;
    height: auto;
    right: 30px;
    top: 70px;
    z-index: 2;
}

.banner {
    padding-top: 8%;
    width: 100%;
}

.banner-content {
    max-width: 600px;
    z-index: 3;
}

.title {
    position: relative;
    font-family: "Source Han Sans SC";
    color: #333333;
    font-size: 2.6rem;
    line-height: 1.3;
    margin-bottom: 20px;
    z-index: 3;
}

.desc {
    position: relative;
    font-family: "Source Han Serif SC", "Source Han Serif", sans-serif;
    font-size: 1.09rem;
    line-height: 1.6;
    font-weight: 550;
    margin-top: 35px;
    margin-bottom: 45px;
    margin-right: 24%;
    color: rgb(48, 50, 49);
    z-index: 3;
}

.btn-group {
    display: flex;
    gap: 18px;
}

.btn {
    display: inline-flex;
    /* 使文字和图片水平排列 */
    align-items: center;
    padding: 9px 17px;
    font-weight: 420;
    font-size: 13px;
    border: none;
    border-radius: 11px;
    text-decoration: none;
    /* 去掉链接下划线 */
    cursor: pointer;
    transition: background-color 0.3s ease;
}


/* 第一个按钮样式（蓝底白字） */

.btn.blue {
    background-color: rgb(64, 138, 225);
    color: #fff;
    gap: 12px;
}


/* 第二个按钮样式（白底蓝字） */

.btn.white {
    background-color: rgb(255, 255, 255);
    color: rgb(64, 138, 225);
    gap: 12px;
}

.arrow {
    width: 11px;
    height: 11px;
}

.btn:focus {
    outline: none;
}


/* 导航栏样式 */

.nav-container {
    position: relative;
    width: 100%;
    margin: 0 auto;
    padding-top: 36%;
}

.nav {
    position: relative;
    top: 0;
    z-index: 999;
    width: 100%;
    /* 确保导航栏宽度与容器一致 */
}

.nav-list {
    display: flex;
    min-width: 94px;
    justify-content: center;
}

.nav-list li {
    list-style: none;
    flex: 1;
    margin: 0 auto;
}

.nav-list li a {
    padding: 12% 0;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    font-size: small;
    color: #fff;
    transition: background-color 0.3s ease, transform 0.3s ease;
    white-space: nowrap;
    text-align: center;
}


/* 导航项鼠标悬停上浮效果 */

.nav-list li:hover {
    transform: translateY(-3px);
    transition: transform 0.3s ease;
}

.nav-list li a:hover {
    background-color: #4BD0BF;
}

.nav-list li:not(:last-child) {
    margin-right: 4px;
}

.nav-btn-icon {
    display: inline-block;
    width: 15px;
    height: 15px;
    margin: 5px auto;
    margin-bottom: 11px;
    vertical-align: middle;
}


/* 导航栏各部分不同底色 */

.nav-item-home {
    background-color: #408AE1;
}

.nav-item-profile {
    background-color: #3691E4;
}

.nav-item-party {
    background-color: #2B96E6;
}

.nav-item-degree {
    background-color: #219CE9;
}

.nav-item-exam {
    background-color: #15A1EC;
}

.nav-item-training {
    background-color: #15A1EC;
}

.nav-item-teacher {
    background-color: #00ADF1;
}

.nav-item-social {
    background-color: #15A1EC;
}

.nav-item-family {
    background-color: #219CE9;
}

.nav-item-international {
    background-color: #2B96E6;
}

.nav-item-cloud {
    background-color: #3691E4;
}


/* .nav-item-social {
    background-color: #1AB9E1;
}

.nav-item-family {
    background-color: #31C4CE;
}

.nav-item-international {
    background-color: #4BD0BF;
}

.nav-item-cloud {
    background-color: #63DBAD;
} */


/* 导航栏隐藏/显示相关样式 */

.nav-hide {
    opacity: 0;
    transform: translateY(-100%);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.nav-show {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
}


/* 导航栏固定在顶部的样式 */

.nav-fixed {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}


/* 底部容器 */

.footer {
    margin: 0 auto;
    padding-top: 5%;
    padding-left: 12%;
    padding-right: 12%;
    display: flex;
    justify-content: space-between;
    background-color: #00070F;
    color: #fff;
}


/* 左侧联系我们模块 */

.footer-left h2,
.footer-middle h2,
.footer-right h2 {
    font-size: 22px;
    position: relative;
    padding-bottom: 8px;
    margin-bottom: 20px;
}

.footer-left h2::after,
.footer-middle h2::after,
.footer-right h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 30px;
    height: 3px;
    background-color: #007bff;
    /* 蓝色条 */
}

.contact-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.contact-left {
    flex: 1;
    margin-bottom: 20px;
    margin-right: 30px;
}

.contact-right {
    margin-bottom: 20px;
}

.contact-item {
    margin-bottom: 20px;
    line-height: 1.6;
}

.contact-item p {
    margin: 0;
    font-size: small;
    font-weight: 200;
    font-family: 'Microsoft YaHei', sans-serif;
}


/* 中间友情链接模块 */

.footer-middle ul {
    list-style: none;
}

.footer-middle ul li {
    margin-bottom: 8px;
    transition: color 0.3s;
}

.footer-middle ul li a {
    font-family: 'Microsoft YaHei', sans-serif;
    font-size: small;
    font-weight: 200;
    cursor: pointer;
    text-decoration: none;
    color: #ffffff;
}


/* 右侧官方微信模块 */

.qrcode-box {
    display: flex;
    gap: 10px;
}

.qrcode-img {
    width: 80px;
    height: 80px;
}

.qrcode-item p {
    display: block;
    text-align: center;
    margin-top: 5px;
    font-family: 'Microsoft YaHei', sans-serif;
    font-size: small;
    font-weight: 200;
}


/* 底部版权栏 */

.footer-bottom {
    margin: 0 auto;
    padding-left: 12%;
    padding-right: 12%;
    padding-top: 1.2%;
    padding-bottom: 2%;
    background-color: #00070F;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-line-container {
    width: 100%;
    display: flex;
    justify-content: center;
    background-color: #00070F;
}

.footer-line {
    border-top: 1px solid #34393F;
    /* 灰色细线 */
    width: 76%;
}

.logo-bottom {
    width: 14vw;
    height: auto;
}

.copyright {
    font-size: 12px;
    margin: 10px 0;
    color: #ffffff;
}

.copyright-media {
    display: none;
}

@media (max-width: 768px) {
    .copyright-media {
        display: block;
        font-size: 12px;
        text-align: center;
    }
    .copyright {
        display: none;
    }
}

.contact-info-media {
    display: none;
}