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

body {
    font-family: "Microsoft YaHei", sans-serif;
    color: #333; 
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
	display: flex;
	flex-direction: column;
}

.content-height {
	min-height: 400px;
	padding-bottom: 100px !important;
}

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

.main-header {
    background: #fff;
    border-bottom: 1px solid #f0f0f0;
}

.header-flex-container {
    display: flex;
    justify-content: space-between; 
    align-items: center;
	margin: 0 auto;
    max-width: 1200px;
	padding: 10px 20px;
}

.logo {
	z-index: 9999;
}

.logo img {
    height: 60px; 
    display: block;
}

.nav-menu .nav-list {
    list-style: none;
    display: flex;
    gap: 25px; 
}

.nav-menu .nav-list > li {
    position: relative; 
    padding: 15px 0;
    cursor: pointer;
}

.nav-menu .nav-list > li a {
    text-decoration: none;
    color: #002f54;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu .nav-list > li.active a, 
.nav-menu .nav-list > li:hover a {
    color: #ff6737; 
}

.nav-menu .nav-list > li.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: #ff6737;
}

.dropdown-content {
	border-top: 3px solid #ff6737;
    position: absolute;
    top: 100%;               
    left: 0;
    background-color: #fff;
    box-shadow: 0px 8px 16px rgba(0,0,0,0.1);
    z-index: 100;
    list-style: none;
    
    
    display: none;           
    margin-top: -3px;
}

.dropdown:hover .dropdown-content {
    display: block !important; 
}

.dropdown-content li {
	padding: 15px 20px !important;
}

.dropdown-content li a {
    white-space: nowrap;
    font-size: 18px;         
    color: #002f54 !important;
}

.dropdown-content li:hover {
    background-color: #f9f9f9; 
}

.dropdown-content li:hover a {
    color: #ff6737 !important; 
}

.contact-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.contact-info a {
    text-decoration: none;
    color: #002f54;
    font-size: 12px;
}

.email-icon {
    color: #ff6737;
    font-size: 12px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}
.menu-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: #002f54;
    transition: 0.3s;
}

.menu-toggle.is-active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.menu-toggle.is-active .bar:nth-child(2) {
    opacity: 0;
}

.menu-toggle.is-active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

@media (min-width: 993px) {
	.mobile-nav-overlay {
		display: none;
	}
}

@media (max-width: 992px) {
    .nav-menu, .contact-info { display: none !important; } 

    .menu-toggle { display: flex; z-index: 1001; position: relative; }

    .mobile-nav-overlay {
        display: none; 
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: #fff;
        z-index: 1000;
        padding-top: 80px; 
        overflow-y: auto;
    }

    .mobile-nav-overlay.show {
        display: block;
    }

    .mobile-tree {
        list-style: none;
        padding: 0 20px;
    }

    .mobile-tree li {
        border-bottom: 1px solid #f0f0f0;
    }

	.mobile-tree li a {
		display: block;
		padding: 18px 0;
        color: #002f54;
        text-decoration: none;
        font-size: 14px;
	}

    .mobile-tree .menu-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .sub-menu {
        display: none;
        list-style: none;
        background: #f9f9f9;
        padding-left: 20px;
    }

    .sub-menu li { border: none; }
    .sub-menu li a { padding: 12px 0; font-size: 14px; }

    .has-children.open .sub-menu { display: block; }
    
    .arrow {
        width: 10px;
        height: 10px;
        border-right: 2px solid #002f54;
        border-bottom: 2px solid #002f54;
        transform: rotate(45deg);
        transition: 0.3s;
        margin-right: 10px;
    }
    .has-children.open .arrow { transform: rotate(-135deg); }
}

.main-footer {
    width: 100%;
    font-size: 14px;
}

.footer-top {
    background-color: #002f54; 
    padding: 30px 0;
    color: #ffffff;
}

.footer-flex-container {
    display: flex;
    justify-content: space-evenly; 
    align-items: center;
}

.footer-left .footer-qr {
    text-align: center;
}

.footer-left .footer-qr p {
    margin-bottom: 15px;
    color: #a0b3c6;
}

.footer-left .footer-qr img {
    width: 140px;
    height: 140px;
    background: #fff;
}

.footer-right {
    display: flex;
    flex-direction: column;
    gap: 15px;
    text-align: left;
}

.footer-right .info-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: #a0b3c6;
}

.footer-right .info-item a {
    color: #a0b3c6;
    text-decoration: none;
}

.footer-right .info-copyright {
    margin-top: 10px;
    color: #a0b3c6;
}

.footer-bottom {
    background-color: #ffffff;
    padding: 15px 0;
    border-top: 1px solid #f0f0f0;
}

.beian-text {
	width: 100%
    text-align: center; 
    color: #999;
    font-size: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

.beian-text img {
    width: 18px;
    height: 18px;
    margin: 0 5px;
}

.beian-text a {
	color: #999;
	text-decoration: none;
}

@media (max-width: 576px) {
    .footer-flex-container {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }
    
    .footer-right {
        align-items: center;
        text-align: center;
    }
    
    .footer-right .info-item {
        justify-content: center;
    }
}

.content-header {
    width: 100%;
    height: 133px;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 60px;
}

.content-header h2 {
    color: #fff;
    font-size: 50px;
    letter-spacing: 8px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.banner-container {
    position: relative; 
    width: 100%;
    
     
    overflow: hidden; 
}

.background-img {
    width: 100%;
    height: auto;
    display: block; 
}

.slide-in-circle-img {
    position: absolute;
	top: 10%;           
    left: 20%;
    width: 35%;         
    height: auto;
    z-index: 10;      
    animation: slideInFromRight 0.5s ease-out forwards; 
    will-change: transform; 
}

@keyframes slideInFromRight {
    0% {
        transform: translateX(200%);
        opacity: 0; 
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

@media (max-width: 576px) {
    .slide-in-circle-img {
        width: 30%;
        left: 20%;
        top: 15%;
    }
}

.special-courses {
    padding: 50px 20px;
    background-color: #f0f4fa; 
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.section-title {
    text-align: center;
    font-size: 28px;
    margin-bottom: 40px;
    color: #333;
}

.courses-grid {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    gap: 0; 
	flex-wrap: wrap;
}

.course-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 450px; 
	padding: 5px;
	transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.course-card:hover {
	transform: translateY(-10px); 
    box-shadow: 0 20px 40px rgba(0, 74, 124, 0.1);
	cursor: pointer;
}

.course-info {
    flex: 1;
    padding: 30px 20px;
    color: #ffffff;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: flex-start; 
}

.course-info h3 {
    font-size: 18px;
    margin-bottom: 15px;
    font-weight: bold;
    line-height: 1.4;
}

.course-info p {
    font-size: 13px;
    line-height: 1.6;
    text-align: justify; 
    opacity: 0.9;
}

.course-image {
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover; 
    display: block;
}

.bg-orange {
    background-color: #ff6737; 
}

.bg-dark-blue {
    background-color: #002f54; 
}

@media (max-width: 992px) {
    .course-card {
        flex: 0 0 50%; 
    }
}

@media (max-width: 576px) {
    .courses-grid {
        flex-direction: column;
    }
    .course-card {
        margin-bottom: 10px;
    }
}

.team-section {
    padding: 40px 0;
    background-color: #f0f4fa; 
    text-align: center;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.member-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 20px; 
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05); 
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
	min-height: 600px;
}

.member-card:hover {
    transform: translateY(-10px); 
    box-shadow: 0 20px 40px rgba(0, 74, 124, 0.1);
	cursor: pointer;
}

.avatar {
    width: 180px;
    height: 180px;
    border-radius: 50%; 
    overflow: hidden;
    margin-bottom: 25px;
    border: 5px solid #f0f0f0;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-card h3 {
    color: #002f54;
    font-size: 22px;
    margin-bottom: 20px;
}

.member-bio {
    list-style: none;
	width: 100%;
    text-align: left; 
    padding: 0;
}

.member-bio li {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 8px;
    position: relative;
    padding-left: 15px;
}

.member-bio li::before {
    content: "•";
    color: #002f54;
    font-weight: bold;
    position: absolute;
    left: 0;
}

@media (max-width: 992px) {
    .team-grid {
        grid-template-columns: repeat(2, 1fr); 
    }
}

@media (max-width: 576px) {
    .team-grid {
        grid-template-columns: 1fr; 
    }
    .avatar {
        width: 150px;
        height: 150px;
    }
}

.brand-introduction {
    padding-bottom: 60px;
    background-color: #fff;
    text-align: center;
}

.brand-header {
    width: 100%;
    height: 133px; 
    background: url('../imgs/brand-header-bg.jpg') no-repeat center center;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 40px;
}

.brand-header h2 {
    color: #fff;
    font-size: 50px;
    letter-spacing: 4px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.brand-logo {
    margin: 0 auto 40px auto;
}

.brand-logo img {
    max-width: 180px;
    height: auto;
}

.brand-main-img {
    max-width: 600px; 
    margin: 0 auto 40px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}

.brand-main-img img {
    width: 100%;
    display: block;
    border-radius: 4px;
}

.brand-content {
    max-width: 850px;
    margin: 0 auto;
    padding: 0 20px;
}

.brand-content h2 {
	text-align: center;
	margin-bottom: 10px;
}

.brand-content p {
    font-size: 16px;
    color: #333;
    line-height: 2; 
    text-align: justify; 
}

.brand-content strong {
    color: #000;
    font-weight: bold;
}

.brand-content .content-img {
	max-width: 444px; 
	margin: 20px auto; 
	width: 100%;
}

.founders-section {
    background: #fff;
}

.founder-item {
    display: flex;
    gap: 50px;
    margin-bottom: 100px;
    align-items: flex-start;
	max-width: 850px;
}

.founder-photo {
    flex: 0 0 350px; 
}

.founder-photo img {
    width: 100%;
    display: block;
}

.founder-info {
    flex: 1;
}

.founder-title {
    margin-bottom: 20px;
}

.founder-title .name {
    font-size: 48px;
    font-weight: bold;
    color: #000;
    margin-right: 15px;
}

.founder-title .role {
    font-size: 20px;
    color: #333;
    font-weight: bold;
}

.founder-desc {
    font-size: 16px;
    line-height: 1.6;
    color: #444;
    margin-bottom: 25px;
}

.founder-tags {
    list-style: none;
    padding: 0;
    margin-bottom: 20px;
}

.founder-tags li {
    font-size: 24px;
    color: #cc9966; 
    margin-bottom: 5px;
}

.founder-tags.science li {
    font-size: 20px; 
}

.founder-highlight {
    font-size: 26px;
    color: #cc9966;
    margin: 20px 0;
    border-bottom: 1px solid #eee;
    display: inline-block;
    padding-bottom: 5px;
}

.sub-desc, .experience {
    color: #333;
    font-size: 15px;
    line-height: 1.6;
}

@media (max-width: 992px) {
    .founder-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .founder-photo {
        flex: 0 0 auto;
        width: 80%;
        margin-bottom: 30px;
    }
    .founder-title .name {
        display: block;
        margin: 0 0 10px 0;
    }
}

@media (max-width: 576px) {
    .brand-header {
        height: 150px;
    }
    .brand-header h2 {
        font-size: 28px;
    }
    .brand-main-img {
        width: 90%;
    }
    .brand-content p {
        font-size: 14px;
        line-height: 1.8;
    }
}

.mission-section {
    padding-bottom: 80px;
    background-color: #fff;
}

.mission-banner {
    width: 100%;
    height: 133px;
    background: url('../imgs/mission-banner-bg.jpg') no-repeat center center;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 60px;
}

.mission-banner h2 {
    color: #fff;
    font-size: 50px;
    letter-spacing: 8px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.mission-content {
    max-width: 900px;
    margin: 0 auto;
    color: #333;
}

.core-statement {
    margin-bottom: 50px;
}

.core-statement p {
    font-size: 18px;
    line-height: 2;
    margin-bottom: 15px;
}

.mission-group {
    margin-bottom: 40px;
}

.mission-group h3 {
    font-size: 22px;
    color: #002f54; 
    margin-bottom: 20px;
    border-left: 4px solid #ff6b4a; 
    padding-left: 15px;
}

.mission-group ul {
    list-style: none;
    padding: 0;
}

.mission-group li {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    text-align: justify;
}

.mission-group li strong {
    color: #333;
    display: block; 
    margin-bottom: 5px;
    font-size: 17px;
}

@media (max-width: 576px) {
    .mission-banner {
        height: 200px;
    }
    .mission-banner h2 {
        font-size: 30px;
    }
    .mission-group h3 {
        font-size: 20px;
    }
}

.case-study-section {
	background-color: #f7f8fa;
}

.case-study-banner {
    width: 100%;
    height: 133px;
    background: url('../imgs/case-study-banner-bg.jpg') no-repeat center center;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 60px;
}

.case-study-banner h2 {
    color: #fff;
    font-size: 50px;
    letter-spacing: 8px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.case-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap; 
}

.tab-btn {
    padding: 10px 25px;
    border: none;
    background: #f0f0f0;
    cursor: pointer;
    font-size: 16px;
    transition: 0.3s;
}

.tab-btn.active {
    background: #333;
    color: #fff;
}

.case-carousel {
    position: relative;
    overflow: hidden; 
	min-height: 800px;
	background-color: #fff;
	padding: 20px;
}

.case-item {
    display: none; 
    flex-direction: row;
    gap: 30px;
    align-items: flex-start;
	max-width: 850px;
}

.case-item.active {
    display: flex; 
}

.case-item img {
    width: 40%; 
    height: auto;
    object-fit: cover;
}

.case-text {
    flex: 1;
    text-align: justify;
}

.case-text p {
	margin: 0 0 10px 0;
	line-height: 2;
}

.case-layout-wrap {
    overflow: hidden; 
}

.case-layout-wrap .case-image-wrapper {
    float: left; 
    width: 40%;  
    margin-right: 25px; 
    margin-bottom: 15px; 
}

.case-item.case-layout-wrap.active {
    display: block; 
}

.case-layout-wrap .case-image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
}

@media (max-width: 768px) {
    .case-layout-wrap .case-image-wrapper {
        float: none;
        width: 100%;
        margin-right: 0;
    }
}

@media (max-width: 576px) {
    .case-item {
        flex-direction: column; 
    }
    
    
    .case-carousel {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory; 
    }
}

.evaluation-header {
    background: url('../imgs/evaluation-header-bg.jpg') no-repeat center center;
}

.qr-code-section {
    text-align: center;
    margin-bottom: 50px;
}

.qr-wrapper img {
    width: 180px; 
    height: auto;
    margin-bottom: 15px;
}

.qr-wrapper p {
    font-size: 18px;
    color: #333;
    letter-spacing: 1px;
}

.evaluation-intro {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 60px; 
    padding: 0 20px;
}

.evaluation-intro h3 {
    font-size: 26px;
    margin-bottom: 30px;
    color: #ffffff;
    letter-spacing: 2px;
    
    -webkit-text-stroke: 1px #000000;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.intro-content {
    position: relative;
    display: inline-block; 
    max-width: 850px;
}

.intro-content .main-image {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 8px; 
	max-width: 444px;
}

.disclaimer {
    font-size: 24px;
    color: #e36a56; 
    font-weight: bold;
    letter-spacing: 4px; 
    margin-top: 40px;
}

@media (max-width: 768px) {
    .evaluation-intro h3 { font-size: 20px; }
    .disclaimer { font-size: 18px; }
    .tag { 
        font-size: 12px; 
        padding: 6px 12px;
    }
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr); 
    gap: 15px; 
    margin-bottom: 40px;
}

.activity-item {
    position: relative;
    overflow: hidden;
    
    aspect-ratio: 16 / 7; 
}

.activity-item img {
    width: 100%;
    height: 100%;
    object-fit: cover; 
    display: block;
}

.overlay-text {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.5); 
    color: #ffffff;
    font-size: 14px;
    padding: 8px 0;
    text-align: center;
    letter-spacing: 1px;
}

@media (max-width: 576px) {
    .activity-grid {
        grid-template-columns: 1fr; 
        gap: 10px;
    }
}

.text-side { 
	flex: 1; 
	font-size: 18px; 
	line-height: 1.5; 
	color: #333; 
	margin-bottom: 10px;
}

.job-item {
    margin: 20px 0 50px 0;
    padding-bottom: 30px;
    border-bottom: 1px solid #eee;
}

.job-item h3 {
    color: #002f54; 
    font-size: 18px;
    margin-bottom: 20px;
}

.job-item h4 {
    font-size: 16px;
    margin: 15px 0 10px 0;
    color: #333;
}

.job-item ul {
    list-style: none; 
    padding-left: 0;
}

.job-item li {
    font-size: 14px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 5px;
    padding-left: 20px;
    position: relative;
}

.job-item li::before {
    content: "•";
    color: #ff6737; 
    font-weight: bold;
    position: absolute;
    left: 0;
}

.mail-to {
	color: #002f54;
	text-decoration: none;
}