/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0073aa;
    --primary-dark: #005a87;
    --secondary-color: #23282d;
    --accent-color: #00a0d2;
    --light-gray: #f1f1f1;
    --medium-gray: #ddd;
    --dark-gray: #666;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

a {
    text-decoration: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 语言切换栏 - 修复下拉菜单位置 */
.language-switcher {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 8px 0;
    font-size: 14px;
    position: relative; /* 添加这个 */
}

.language-switcher .container {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 20px;
}

.language-container {
    min-width: 94px;
    position: relative; /* 新添加的容器，用于定位下拉菜单 */
    display: inline-block;
}

#current-language {
    cursor: pointer;
    padding: 5px 15px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
    position: relative;
    justify-content: center;
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

#current-language:hover {
    background-color: rgba(255, 255, 255, 0.2);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.language-dropdown {
    position: absolute;
    top: 100%; /* 固定在按钮下方 */
    left: 0;
    background-color: var(--white);
    box-shadow: var(--shadow);
    display: none;
    z-index: 1000;
    min-width: 94.73px;
    width: 100%;
    margin-top: 8px; /* 添加一点间距 */
}

.language-dropdown.show {
    display: block; /* 使用JavaScript控制显示 */
}

.lang-btn {
    display: block;
    width: 100%;
    padding: 10px 15px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    color: var(--secondary-color);
    transition: var(--transition);
    border-bottom: 1px solid var(--light-gray);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.lang-btn:last-child {
    border-bottom: none;
}

.lang-btn:hover {
    background-color: var(--light-gray);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.lang-btn.active {
    background-color: var(--primary-color);
    color: var(--white);
}

.country-display {
    display: flex;
    align-items: center;
    gap: 5px;
    min-width: 100px;
    padding: 5px 10px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    justify-content: center;
}

/* 导航栏 */
/* 导航栏 */
.navbar {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 5px;
}

.logo img {
    height: 40px;
    width: auto;
}

.logo h1 {
    color: var(--secondary-color);
    font-size: 30px;
    font-weight: 600;
    line-height: 40px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-menu li {
    margin: 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.nav-link:hover {
    background-color: rgba(0, 115, 170, 0.05);
    color: var(--primary-color);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.nav-link.active {
    color: var(--primary-color);
    background-color: rgba(0, 115, 170, 0.1);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 1px;
}

.nav-link i {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.nav-text {
    display: inline-block;
}

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--secondary-color);
}

/* 响应式设计更新 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
        gap: 10px;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-link {
        padding: 12px 15px;
        justify-content: flex-start;
    }
    
    .nav-link.active::after {
        display: none;
    }
    
    .nav-link.active {
        background-color: rgba(0, 115, 170, 0.15);
    }
    
    .mobile-menu-btn {
        display: block;
    }
}

/* 英雄区域 */
.hero-section {
    padding: 60px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    text-align: center;
}

.hero-section h2 {
    font-size: 48px;
    margin-bottom: 15px;
    font-weight: 700;
    -webkit-filter: drop-shadow(2px 2px 2px rgba(0,0,0,.5));
    filter: drop-shadow(2px 2px 2px rgba(0,0,0,.5));
}

.hero-section p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.download-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.download-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    color: var(--secondary-color);
    transition: var(--transition);
    position: relative;
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.version-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-color);
    color: var(--white);
    padding: 5px 20px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
}

.version-badge.old {
    background-color: var(--dark-gray);
}

.download-card h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.version-info {
    color: var(--dark-gray);
    margin-bottom: 25px;
    font-size: 16px;
}

.download-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
}

.download-btn.primary {
    background-color: var(--primary-color);
    color: var(--white);
    box-shadow: 0 1px 3px #9e9e9e, 0 0 1px #9e9e9e, 0 0 1px #9e9e9e;
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.download-btn.primary:hover {
    background-color: var(--primary-dark);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.download-btn.secondary {
    background-color: var(--light-gray);
    color: var(--secondary-color);
    box-shadow: 0 1px 3px #9e9e9e, 0 0 1px #9e9e9e, 0 0 1px #9e9e9e;
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.download-btn.secondary:hover {
    background-color: var(--medium-gray);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.file-info {
    color: var(--dark-gray);
    font-size: 14px;
    margin-top: 10px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.stat-item {
    box-shadow: 0 1px 3px #ffffff, 0 0 1px #ffffff, 0 0 1px #ffffff;
    background-color: rgba(255, 255, 255, 0.1);
    padding: 25px;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

.stat-item i {
    font-size: 36px;
    margin-bottom: 15px;
    color: #fff;
}

.stat-item h3 {
    font-size: 28px;
    margin-bottom: 5px;
}

.stat-item p {
    font-size: 16px;
    opacity: 0.9;
}

/* 关于我们 */
.about-section {
    padding: 40px 0;
    background-color: var(--white);
}

.about-section h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 40px;
    color: var(--secondary-color);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 18px;
    line-height: 1.8;
    color: var(--dark-gray);
}

.about-image img {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    display: block;
    -webkit-filter: drop-shadow(3px 3px 3px rgba(0,0,0,.5));
    filter: drop-shadow(3px 3px 3px rgba(0,0,0,.5));
}

/* 功能特性 */
.features-section {
    padding: 40px 0;
    background-color: var(--light-gray);
}

.features-section h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: var(--secondary-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.feature-card:hover {
    transform: translateY(-5px);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.feature-card i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.feature-card p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* 安装指南 */
.install-section {
    padding: 40px 0;
    background-color: var(--white);
}

.install-section h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: var(--secondary-color);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.step {
    position: relative;
    padding: 30px 20px;
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.step p {
    color: var(--dark-gray);
}

/* 常见问题 */
.faq-section {
    padding: 40px 0;
    background-color: var(--light-gray);
}

.faq-section h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: var(--secondary-color);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--white);
    margin-bottom: 15px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.faq-question:hover {
    background-color: rgba(0, 115, 170, 0.05);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.faq-question h3 {
    font-size: 18px;
    color: var(--secondary-color);
}

.faq-question i {
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 30px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px 30px 20px;
    max-height: 500px;
}

.faq-answer p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* 联系我们 */
.contact-section {
    padding: 40px 0;
    background-color: var(--white);
}

.contact-section h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.contact-section > p {
    text-align: center;
    color: var(--dark-gray);
    margin-bottom: 50px;
    font-size: 18px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    text-align: center;
}

.contact-item {
    padding: 30px;
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    transition: var(--transition);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.contact-item i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.contact-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.contact-item p {
    color: var(--dark-gray);
}

/* 页脚 */
footer {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    justify-content: center;
    gap: 5px;
    align-items: center;
}

.footer-logo img {
    height: 75px;
    filter: brightness(0) invert(1); /* 使logo变成白色 */
}

.getlogo h3 {
    font-size: 24px;
    margin-bottom: 0px;
}

.getlogo p {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
}

.link-group h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--white);
}

.link-group a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: 10px;
    transition: var(--transition);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.link-group a:hover {
    color: var(--accent-color);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-section h2 {
        font-size: 36px;
    }
    
    .hero-section p {
        font-size: 18px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .features-grid,
    .stats,
    .steps,
    .contact-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .language-switcher .container {
        justify-content: space-between;
    }

    .download-buttons {
        grid-template-columns: 1fr;
    }
    
    .download-options {
        flex-direction: column;
    }
    
    .hero-section h2 {
        font-size: 28px;
    }
    
    .logo h1 {
        font-size: 28px;
    }
}
/* 返回顶部/底部按钮样式 */
.scroll-buttons {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: var(--transition);
}

.scroll-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 12px rgba(0, 115, 170, 0.3);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.scroll-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-btn:hover {
    background-color: var(--primary-dark);
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 115, 170, 0.4);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.scroll-btn:active {
    transform: scale(0.95);
}

.scroll-to-bottom {
    background-color: var(--accent-color);
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

.scroll-to-bottom:hover {
    background-color: #0085b2;
    -webkit-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -o-transition: all .4s ease-in-out;
}

/* 添加呼吸动画效果 */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 115, 170, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 115, 170, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 115, 170, 0);
    }
}

.scroll-btn.pulse {
    animation: pulse 2s infinite;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .scroll-buttons {
        right: 15px;
        bottom: 15px;
    }
    
    .scroll-btn {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .scroll-buttons {
        right: 10px;
        bottom: 10px;
    }
    
    .scroll-btn {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
}