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

body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    color: white;
    overflow-x: hidden;
    background: #000;
}

.video-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

#myVideo {
    position: absolute;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    object-fit: cover;
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
}

.logo a {
    color: white;
    text-decoration: none;
    font-size: 24px;
    font-weight: 600;
}

.nav-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.menu {
    list-style: none;
    display: flex;
    gap: 40px;
}

.menu li a {
    color: white;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.menu li a:hover {
    color: #999;
}

.language-switch {
    display: flex;
    gap: 10px;
}

.language-switch a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.language-switch a.active {
    color: #999;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: white;
    transition: all 0.3s ease;
}

main {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.content {
    padding: 20px;
}

.content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 300;
    opacity: 1;
}

.content p {
    font-size: 24px;
    opacity: 0.8;
    transition: opacity 0.3s ease-in-out;
}

footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    padding: 10px;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    font-size: 12px;
}

@media (max-width: 768px) {
    nav {
        padding: 15px 20px;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-content {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.9);
        padding: 20px;
        flex-direction: column;
        gap: 20px;
        transform: translateY(-100%);
        transition: transform 0.3s ease;
    }

    .nav-content.active {
        transform: translateY(0);
    }

    .menu {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .content h1 {
        font-size: 32px;
    }

    .content p {
        font-size: 18px;
    }
}

.video-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.video-background {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease-in-out, transform 1.5s ease-in-out;
}

.video-background.active {
    opacity: 1;
    visibility: visible;
    transform: scale(1.05);
}

.category-nav {
    position: fixed;
    left: 40px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 998;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.category-dot {
    width: 6px;
    height: 6px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.category-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: all 0.3s ease;
    opacity: 1;
    transform: translateX(0);
    white-space: nowrap;
}

.category-item:hover .category-dot,
.category-item.active .category-dot {
    width: 10px;
    height: 10px;
    background: white;
}

.category-item:hover .category-text {
    color: rgba(255, 255, 255, 0.9);
    transform: translateX(5px);
}

.category-item.active {
    transform: scale(1.1);
}

.category-item.active .category-text {
    color: white;
    font-size: 16px;
    font-weight: 500;
    transform: translateX(5px);
}

@media (max-width: 768px) {
    .category-nav {
        left: 20px;
    }
    
    .category-text {
        font-size: 14px;
    }
}

.content-title,
.content-desc {
    transition: opacity 0.3s ease-in-out;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background-color: rgba(0, 0, 0, 0.9);
    margin: 10% auto;
    padding: 40px;
    width: 80%;
    max-width: 600px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    animation: modalFadeIn 0.3s ease-out;
}

.team-section {
    margin-bottom: 30px;
}

.team-section:last-child {
    margin-bottom: 0;
}

.team-title {
    color: #fff;
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.team-info {
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    line-height: 2;
    margin-bottom: 8px;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-modal {
    position: absolute;
    right: 20px;
    top: 15px;
    color: white;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-modal:hover {
    color: #999;
}

@media (max-width: 768px) {
    .modal-content {
        width: 90%;
        margin: 20% auto;
        padding: 25px;
    }
    
    .team-title {
        font-size: 20px;
        margin-bottom: 12px;
    }
    
    .team-info {
        font-size: 14px;
        line-height: 1.8;
    }

    .team-section {
        margin-bottom: 25px;
    }
}

/* 修改按钮样式 */
.website-btn {
    display: block;
    color: white;
    text-decoration: none;
    padding: 12px 25px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    margin: 30px auto 0;
    font-size: 16px;
    transition: all 0.5s ease;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    width: fit-content;
}

.second-btn {
    margin-top: 15px !important;
}

.website-btn.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.website-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .website-btn {
        font-size: 14px;
        padding: 10px 20px;
    }
    
    .second-btn {
        margin-top: 10px !important;
    }
}

/* 添加到现有的 CSS 文件中 */
.contact-modal {
    max-width: 500px;
    text-align: center;
}

.contact-title {
    color: white;
    font-size: 24px;
    margin-bottom: 30px;
    font-weight: 500;
}

.contact-info {
    text-align: left;
    padding: 0 20px;
}

.contact-info p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    line-height: 2.5;
    margin-bottom: 10px;
}

.contact-info a {
    color: #fff;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.contact-info a:hover {
    opacity: 0.7;
}

@media (max-width: 768px) {
    .contact-title {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .contact-info p {
        font-size: 14px;
        line-height: 2;
    }
}

/* 添加网址导航弹窗样式 */
.nav-modal {
    max-width: 700px;
}

.nav-title {
    color: white;
    font-size: 24px;
    margin-bottom: 30px;
    text-align: center;
    font-weight: 500;
}

.nav-sections {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.nav-section {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 20px;
}

.nav-section:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.nav-section h3 {
    color: rgba(255, 255, 255, 0.9);
    font-size: 18px;
    margin-bottom: 15px;
    font-weight: 500;
}

.nav-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s ease;
    padding: 8px 0;
}

.nav-links a:hover {
    color: white;
    transform: translateX(5px);
}

@media (max-width: 768px) {
    .nav-title {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .nav-section h3 {
        font-size: 16px;
    }

    .nav-links a {
        font-size: 14px;
    }
}

/* 添加下拉菜单样式 */
.nav-dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    min-width: 300px;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    margin-top: 10px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.dropdown-content::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid rgba(0, 0, 0, 0.95);
}

.nav-dropdown:hover .dropdown-content {
    display: block;
    opacity: 1;
    visibility: visible;
}

.dropdown-section {
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.dropdown-section:last-child {
    border-bottom: none;
}

.dropdown-section h3 {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: 10px;
    font-weight: normal;
}

.dropdown-section a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 8px 0;
    font-size: 15px;
    transition: all 0.2s ease;
}

.dropdown-section a:hover {
    color: #fff;
    transform: translateX(5px);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .dropdown-content {
        position: static;
        transform: none;
        min-width: auto;
        background: transparent;
        box-shadow: none;
        margin-top: 0;
        padding: 0 20px;
    }

    .dropdown-content::before {
        display: none;
    }

    .dropdown-section {
        padding: 10px 0;
    }

    .dropdown-section h3 {
        font-size: 13px;
    }

    .dropdown-section a {
        font-size: 14px;
        padding: 6px 0;
    }
}

/* 修改全屏导航样式 */
.fullscreen-nav {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    height: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    z-index: 1001;
    overflow: hidden;
    transition: all 0.3s ease;
}

.fullscreen-nav.active {
    height: 300px;
}

.fullscreen-nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 40px;
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1002;
}

.fullscreen-nav.active .fullscreen-nav-content {
    opacity: 1;
    transform: translateY(0);
}

.nav-grid {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-top: 0;
}

.nav-group {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 8px;
}

.nav-group h3 {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin-bottom: 15px;
    font-weight: normal;
    text-transform: uppercase;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 8px;
}

.nav-group a {
    display: block;
    color: white;
    text-decoration: none;
    font-size: 15px;
    padding: 8px 0;
    transition: all 0.3s ease;
}

.nav-group a:hover {
    color: rgba(255, 255, 255, 0.7);
    transform: translateX(5px);
    padding-left: 5px;
}

.nav-close {
    position: absolute;
    top: 10px;
    right: 20px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-close:hover {
    color: white;
    transform: rotate(90deg);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .fullscreen-nav {
        top: 60px;
    }

    .fullscreen-nav.active {
        height: auto;
        max-height: calc(100vh - 60px);
        padding: 20px 0;
    }

    .fullscreen-nav-content {
        padding: 20px;
    }

    .nav-grid {
        flex-direction: column;
        gap: 15px;
    }

    .nav-group {
        padding: 15px;
    }

    .nav-group h3 {
        font-size: 13px;
        margin-bottom: 10px;
    }

    .nav-group a {
        font-size: 14px;
        padding: 6px 0;
    }
}

/* 修改移动端样式 */
@media (max-width: 768px) {
    /* 航栏调整 */
    nav {
        padding: 15px 20px;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-content {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.9);
        padding: 20px;
        flex-direction: column;
        gap: 20px;
        transform: translateY(-100%);
        transition: transform 0.3s ease;
    }

    .nav-content.active {
        transform: translateY(0);
    }

    /* 左侧分类导航调整 */
    .category-nav {
        left: 10px; /* 减小左侧间距 */
        gap: 25px; /* 减小分类间距 */
    }
    
    .category-text {
        font-size: 12px; /* 减小字体大小 */
    }

    .category-item.active .category-text {
        font-size: 14px;
    }

    .category-dot {
        width: 4px; /* 减小点的大小 */
        height: 4px;
    }

    .category-item:hover .category-dot,
    .category-item.active .category-dot {
        width: 6px;
        height: 6px;
    }

    /* 中间内容区域调整 */
    .content {
        padding: 20px 40px; /* 增加左右内边距 */
    }

    .content h1 {
        font-size: 24px; /* 减小标题字体 */
    }

    .content p {
        font-size: 16px; /* 减小描述文字字体 */
    }

    /* 网址导航调整 */
    .fullscreen-nav {
        top: 60px;
    }

    .fullscreen-nav.active {
        height: auto;
        max-height: calc(100vh - 60px);
    }

    .fullscreen-nav-content {
        padding: 15px;
    }

    .nav-grid {
        flex-direction: column;
        gap: 10px;
    }

    .nav-group {
        padding: 12px;
    }

    /* 底部版权信息调整 */
    footer {
        padding: 15px;
        font-size: 12px;
    }

    /* 访问官网按钮调整 */
    .website-btn {
        font-size: 14px;
        padding: 8px 20px;
        margin-top: 20px;
    }
}

/* 添加超小屏幕的适配 */
@media (max-width: 360px) {
    .category-nav {
        left: 5px;
        gap: 20px;
    }

    .category-text {
        font-size: 11px;
    }

    .content h1 {
        font-size: 20px;
    }

    .content p {
        font-size: 14px;
    }
}

/* 修改导航栏相关样式 */
@media (max-width: 768px) {
    nav {
        padding: 15px 20px;
    }

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

    .nav-content {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: auto;
        background: rgba(0, 0, 0, 0.9);
        padding: 20px;
        flex-direction: column;
        gap: 20px;
        transform: translateY(-150%); /* 改为更大的值确保完全隐藏 */
        transition: transform 0.3s ease;
        z-index: 1000;
    }

    .nav-content.active {
        transform: translateY(0);
        display: flex !important; /* 强制显示 */
    }

    .menu {
        flex-direction: column;
        gap: 20px;
        text-align: center;
        width: 100%;
        display: flex !important; /* 强制显示 */
    }

    .menu li {
        width: 100%;
    }

    .menu li a {
        display: block;
        padding: 10px 0;
        font-size: 16px;
    }

    .language-switch {
        text-align: center;
        width: 100%;
        justify-content: center;
    }
}

/* 添加播放提示层样式 */
.play-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(5px);
}

.play-button {
    padding: 20px 40px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.play-button span {
    color: white;
    font-size: 18px;
}

.play-button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .play-button {
        padding: 15px 30px;
    }
    
    .play-button span {
        font-size: 16px;
    }
}

/* 添加第二个按钮的样式 */
.second-btn {
    margin-top: 15px !important;
}

@media (max-width: 768px) {
    .second-btn {
        margin-top: 10px !important;
    }
}

footer p {
    font-size: 12px; /* 调整字体大小 */
    color: rgba(255, 255, 255, 0.6); /* 调整颜色为更暗的白色 */
    margin: 5px 0; /* 增加上下间距 */
}