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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

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

/* 头部样式 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

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

.logo h1 {
    font-size: 1.8rem;
    color: #4285f4;
    font-weight: 600;
}

.nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav ul li {
    margin-left: 30px;
}

.nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
    font-size: 1rem;
}

.nav ul li a:hover {
    color: #4285f4;
}

/* 移动端导航菜单 */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #333;
    transition: all 0.3s ease;
}

/* 主要内容区域 */
main {
    margin-top: 80px;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #4285f4, #34a853);
    color: white;
    padding: 40px 0;
    text-align: center;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-text {
    flex: 1;
    text-align: left;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 400px;
}

.banner-img {
    max-width: 100%;
    height: auto;
    max-height: 300px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.hero-content h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 30px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    margin: 0 10px;
}

.btn-primary {
    background-color: #fff;
    color: #4285f4;
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid #fff;
    color: #fff;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* 特点区域 */
.features {
    padding: 40px 0;
    background-color: #f8f9fa;
}

.features h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
    color: #333;
    position: relative;
    padding-bottom: 12px;
}

.features h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #4285f4;
    border-radius: 2px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    padding: 0 15px;
}

.feature-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f7ff;
    border-radius: 12px;
    padding: 12px;
    position: relative;
    overflow: hidden;
}

.feature-icon .icon {
    position: relative;
    width: 100%;
    height: 100%;
    display: block;
}

/* 速度图标 */
.speed-icon .icon:before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid #4285f4;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 2s linear infinite;
}

.speed-icon .icon:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40%;
    height: 40%;
    background: #4285f4;
    border-radius: 50%;
}

/* 安全图标 */
.security-icon .icon:before {
    content: '';
    position: absolute;
    width: 100%;
    height: 60%;
    background: #4285f4;
    border-radius: 8px 8px 0 0;
    bottom: 0;
}

.security-icon .icon:after {
    content: '';
    position: absolute;
    width: 40%;
    height: 40%;
    background: #4285f4;
    border-radius: 50%;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
}

/* 同步图标 */
.sync-icon .icon:before {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background: #4285f4;
    top: 50%;
    transform: translateY(-50%);
}

.sync-icon .icon:after {
    content: '';
    position: absolute;
    width: 30%;
    height: 30%;
    border: 3px solid #4285f4;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* 扩展图标 */
.extension-icon .icon:before {
    content: '';
    position: absolute;
    width: 60%;
    height: 60%;
    background: #4285f4;
    border-radius: 8px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.extension-icon .icon:after {
    content: '';
    position: absolute;
    width: 30%;
    height: 30%;
    background: #4285f4;
    border-radius: 4px;
    top: 20%;
    right: 20%;
}

/* 翻译图标 */
.translate-icon .icon:before {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background: #4285f4;
    top: 30%;
}

.translate-icon .icon:after {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background: #4285f4;
    bottom: 30%;
}

/* 隐私图标 */
.privacy-icon .icon:before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid #4285f4;
    border-radius: 50%;
}

.privacy-icon .icon:after {
    content: '';
    position: absolute;
    width: 40%;
    height: 40%;
    background: #4285f4;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.feature-content {
    flex: 1;
}

.feature-content h3 {
    color: #4285f4;
    margin-bottom: 12px;
    font-size: 1.3rem;
    font-weight: 600;
}

.feature-content p {
    color: #666;
    margin-bottom: 15px;
    line-height: 1.5;
    font-size: 0.95rem;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    color: #555;
    font-size: 0.9rem;
}

.feature-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #34a853;
    font-weight: bold;
}

/* 安装指南 */
.guide {
    padding: 40px 0;
    background-color: #fff;
}

.guide h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
    color: #333;
    position: relative;
    padding-bottom: 12px;
}

.guide h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #4285f4;
    border-radius: 2px;
}

.guide-content {
    max-width: 1200px;
    margin: 0 auto;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.step-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    overflow: hidden;
}

.step-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

.step-header {
    padding: 25px;
    background: linear-gradient(135deg, #4285f4, #34a853);
    color: white;
    position: relative;
    display: flex;
    align-items: center;
    gap: 15px;
}

.step-number {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: bold;
}

.step-icon {
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.step-icon .icon {
    width: 25px;
    height: 25px;
    background: white;
    border-radius: 50%;
    position: relative;
}

.step-header h3 {
    font-size: 1.3rem;
    margin: 0;
    font-weight: 600;
}

.step-body {
    padding: 25px;
}

.step-body p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.5;
}

.step-details {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 20px;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.detail-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.detail-item .label {
    color: #666;
    font-size: 0.9rem;
}

.detail-item .value {
    color: #333;
    font-weight: 500;
    font-size: 0.9rem;
}

.step-tip {
    background: #f0f7ff;
    border-radius: 8px;
    padding: 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.tip-icon {
    font-size: 1.2rem;
}

.tip-text {
    font-size: 0.9rem;
    color: #4285f4;
    line-height: 1.4;
}

.guide-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.guide-features .feature-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.guide-features .feature-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

.guide-features .feature-icon {
    width: 45px;
    height: 45px;
    min-width: 45px;
    background: #f0f7ff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.guide-features .feature-icon .icon {
    width: 22px;
    height: 22px;
    background: #4285f4;
    border-radius: 50%;
}

.guide-features .feature-content h4 {
    color: #333;
    font-size: 1.1rem;
    margin: 0 0 5px;
    font-weight: 600;
}

.guide-features .feature-content p {
    color: #666;
    font-size: 0.9rem;
    margin: 0;
    line-height: 1.4;
}

/* 系统要求 */
.system-requirements {
    margin-top: 60px;
    padding: 40px 0;
    background: #f8f9fa;
    border-radius: 20px;
}

.system-requirements h3 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 1.8rem;
    color: #333;
    position: relative;
    padding-bottom: 15px;
}

.system-requirements h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #4285f4;
    border-radius: 2px;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    padding: 0 15px;
}

.requirement-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.requirement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

.requirement-header {
    padding: 25px;
    text-align: center;
    position: relative;
    color: white;
}

.requirement-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.requirement-icon .icon {
    width: 30px;
    height: 30px;
    background: white;
    border-radius: 50%;
}

.requirement-header h4 {
    font-size: 1.4rem;
    margin: 0;
    font-weight: 600;
}

.requirement-tag {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255,255,255,0.2);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.requirement-content {
    padding: 25px;
}

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

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

.requirement-section h5 {
    color: #4285f4;
    font-size: 1.1rem;
    margin-bottom: 15px;
    font-weight: 600;
    padding-bottom: 8px;
    border-bottom: 2px solid #f0f7ff;
}

.requirement-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.requirement-section ul li {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid #f0f7ff;
}

.requirement-section ul li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.requirement-section ul li .label {
    color: #666;
    font-size: 0.95rem;
}

.requirement-section ul li .value {
    color: #333;
    font-weight: 500;
    font-size: 0.95rem;
}

/* 特定样式 */
.requirement-card.windows .requirement-header {
    background: linear-gradient(135deg, #4285f4, #34a853);
}

.requirement-card.mac .requirement-header {
    background: linear-gradient(135deg, #34a853, #fbbc05);
}

.requirement-card.linux .requirement-header {
    background: linear-gradient(135deg, #fbbc05, #ea4335);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
        padding: 0 15px;
    }

    .hero-content {
        gap: 20px;
    }

    .feature-grid,
    .version-grid,
    .guide-steps,
    .faq-grid {
        gap: 20px;
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-text {
        text-align: center;
    }

    .hero-image {
        order: -1;
        margin-bottom: 20px;
        max-width: 300px;
    }

    .banner-img {
        max-height: 250px;
    }

    .download-buttons {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .btn {
        margin: 8px 0;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 540px;
    }

    .header .container {
        height: auto;
        padding: 15px;
    }

    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: #fff;
        padding: 80px 20px 20px;
        transition: right 0.3s ease;
        box-shadow: -2px 0 5px rgba(0,0,0,0.1);
    }

    .nav.active {
        right: 0;
    }

    .nav ul {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav ul li {
        margin: 0;
        width: 100%;
        padding: 10px 0;
        border-bottom: 1px solid #eee;
    }

    .nav ul li:last-child {
        border-bottom: none;
    }

    .nav ul li a {
        display: block;
        padding: 5px 0;
        font-size: 1.1rem;
    }

    /* 汉堡菜单动画 */
    .menu-toggle.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

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

    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .hero {
        padding: 30px 0;
    }

    .hero-content h2 {
        font-size: 1.8rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .feature-grid,
    .version-grid,
    .guide-steps,
    .faq-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .feature-card,
    .version-card,
    .step-card,
    .faq-card {
        padding: 15px;
    }

    .feature-icon,
    .version-icon,
    .step-icon,
    .faq-icon {
        width: 45px;
        height: 45px;
    }

    .feature-content h3,
    .version-header h3,
    .step-header h3,
    .faq-content h3 {
        font-size: 1.1rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 15px;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 10px;
    }

    .header .container {
        padding: 10px;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .nav {
        width: 100%;
        max-width: none;
    }

    .nav ul li a {
        font-size: 1rem;
    }

    .hero {
        padding: 25px 0;
    }

    .hero-content h2 {
        font-size: 1.6rem;
    }

    .hero-content p {
        font-size: 0.9rem;
    }

    .hero-image {
        max-width: 250px;
    }

    .banner-img {
        max-height: 200px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .feature-card,
    .version-card,
    .step-card,
    .faq-card {
        padding: 12px;
    }

    .feature-icon,
    .version-icon,
    .step-icon,
    .faq-icon {
        width: 40px;
        height: 40px;
    }

    .feature-content h3,
    .version-header h3,
    .step-header h3,
    .faq-content h3 {
        font-size: 1rem;
    }

    .feature-content p,
    .version-content p,
    .step-body p,
    .faq-answer p {
        font-size: 0.85rem;
    }

    .footer {
        padding: 12px 0 6px;
    }

    .footer-content {
        gap: 10px;
    }

    .footer-section h3 {
        font-size: 0.9rem;
    }

    .footer-section p {
        font-size: 0.75rem;
    }
}

/* 打印样式 */
@media print {
    .header,
    .footer,
    .download-buttons,
    .version-btn {
        display: none;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    a {
        text-decoration: none;
        color: #000;
    }

    .feature-card,
    .version-card,
    .step-card,
    .faq-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    padding: 20px 0 10px;
    text-align: center;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 10px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.footer-section h3 {
    color: #fff;
    margin-bottom: 8px;
    font-size: 1rem;
    font-weight: 500;
}

.footer-section p {
    color: #ccc;
    margin: 4px 0;
    font-size: 0.85rem;
    line-height: 1.3;
}

.footer-bottom {
    padding-top: 8px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.75rem;
    color: #999;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .footer {
        padding: 15px 0 8px;
    }

    .footer-content {
        gap: 12px;
        margin-bottom: 8px;
    }

    .footer-section h3 {
        font-size: 0.95rem;
        margin-bottom: 6px;
    }

    .footer-section p {
        font-size: 0.8rem;
        margin: 3px 0;
    }

    .footer-bottom {
        padding-top: 6px;
        font-size: 0.7rem;
    }
}

@media (max-width: 480px) {
    .footer {
        padding: 12px 0 6px;
    }

    .footer-content {
        gap: 10px;
        margin-bottom: 6px;
    }

    .footer-section h3 {
        font-size: 0.9rem;
        margin-bottom: 5px;
    }

    .footer-section p {
        font-size: 0.75rem;
        margin: 2px 0;
    }

    .footer-bottom {
        padding-top: 5px;
        font-size: 0.65rem;
    }
}

/* 版本信息 */
.version-info {
    margin-top: 20px;
    font-size: 0.9rem;
    opacity: 0.9;
}

.version-info p {
    margin: 5px 0;
}

/* 版本介绍 */
.versions {
    padding: 40px 0;
    background-color: #f8f9fa;
}

.versions h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
    color: #333;
    position: relative;
    padding-bottom: 12px;
}

.versions h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #4285f4;
    border-radius: 2px;
}

.version-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    padding: 0 15px;
}

.version-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    overflow: hidden;
}

.version-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

.version-header {
    padding: 25px;
    text-align: center;
    position: relative;
    background: linear-gradient(135deg, #4285f4, #34a853);
    color: white;
}

.version-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.version-icon .icon {
    width: 30px;
    height: 30px;
    background: white;
    border-radius: 50%;
    position: relative;
}

.version-header h3 {
    font-size: 1.5rem;
    margin: 0;
    font-weight: 600;
}

.version-tag {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255,255,255,0.2);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.version-content {
    padding: 25px;
}

.version-info {
    margin-bottom: 20px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid #eee;
}

.info-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.info-item .label {
    color: #666;
    font-size: 0.9rem;
}

.info-item .value {
    color: #333;
    font-weight: 500;
    font-size: 0.9rem;
}

.version-features {
    list-style: none;
    padding: 0;
    margin: 0 0 25px;
}

.version-features li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 12px;
    color: #555;
    font-size: 0.95rem;
}

.version-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #34a853;
    font-weight: bold;
}

.version-btn {
    display: block;
    text-align: center;
    padding: 12px;
    background: #4285f4;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.version-btn:hover {
    background: #3367d6;
    transform: translateY(-2px);
}

/* 版本卡片特定样式 */
.version-card.windows .version-header {
    background: linear-gradient(135deg, #4285f4, #34a853);
}

.version-card.mac .version-header {
    background: linear-gradient(135deg, #34a853, #fbbc05);
}

.version-card.linux .version-header {
    background: linear-gradient(135deg, #fbbc05, #ea4335);
}

/* FAQ部分 */
.faq {
    padding: 40px 0;
    background-color: #f8f9fa;
}

.faq h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
    color: #333;
    position: relative;
    padding-bottom: 12px;
}

.faq h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #4285f4;
    border-radius: 2px;
}

.faq-content {
    max-width: 1200px;
    margin: 0 auto;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    padding: 0 15px;
}

.faq-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    display: flex;
    gap: 20px;
}

.faq-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

.faq-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    background: #f0f7ff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.faq-icon .icon {
    width: 25px;
    height: 25px;
    background: #4285f4;
    border-radius: 50%;
    position: relative;
}

/* 更新图标 */
.update-icon .icon:before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid #4285f4;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 2s linear infinite;
}

/* 书签图标 */
.bookmark-icon .icon:before {
    content: '';
    position: absolute;
    width: 60%;
    height: 80%;
    background: #4285f4;
    border-radius: 4px 4px 0 0;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
}

/* 清除图标 */
.clear-icon .icon:before {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background: #4285f4;
    top: 50%;
    transform: translateY(-50%);
}

.clear-icon .icon:after {
    content: '';
    position: absolute;
    width: 3px;
    height: 100%;
    background: #4285f4;
    left: 50%;
    transform: translateX(-50%);
}

/* 同步图标 */
.sync-icon .icon:before {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background: #4285f4;
    top: 50%;
    transform: translateY(-50%);
}

.sync-icon .icon:after {
    content: '';
    position: absolute;
    width: 30%;
    height: 30%;
    border: 3px solid #4285f4;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* 扩展图标 */
.extension-icon .icon:before {
    content: '';
    position: absolute;
    width: 60%;
    height: 60%;
    background: #4285f4;
    border-radius: 8px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.extension-icon .icon:after {
    content: '';
    position: absolute;
    width: 30%;
    height: 30%;
    background: #4285f4;
    border-radius: 4px;
    top: 20%;
    right: 20%;
}

/* 隐私图标 */
.privacy-icon .icon:before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid #4285f4;
    border-radius: 50%;
}

.privacy-icon .icon:after {
    content: '';
    position: absolute;
    width: 40%;
    height: 40%;
    background: #4285f4;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-content {
    flex: 1;
}

.faq-content h3 {
    color: #4285f4;
    margin-bottom: 15px;
    font-size: 1.2rem;
    font-weight: 600;
}

.faq-answer {
    color: #666;
}

.faq-answer p {
    margin-bottom: 12px;
    line-height: 1.5;
}

.faq-answer ol {
    padding-left: 20px;
    margin-bottom: 15px;
}

.faq-answer ol li {
    margin-bottom: 8px;
    line-height: 1.4;
}

.faq-tip {
    background: #f0f7ff;
    border-radius: 8px;
    padding: 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-top: 15px;
}

.tip-icon {
    font-size: 1.2rem;
}

.tip-text {
    font-size: 0.9rem;
    color: #4285f4;
    line-height: 1.4;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .faq {
        padding: 30px 0;
    }

    .faq h2 {
        font-size: 1.8rem;
        margin-bottom: 25px;
        padding-bottom: 10px;
    }

    .faq-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .faq-card {
        padding: 20px;
    }

    .faq-icon {
        width: 45px;
        height: 45px;
        min-width: 45px;
    }

    .faq-icon .icon {
        width: 22px;
        height: 22px;
    }

    .faq-content h3 {
        font-size: 1.1rem;
    }

    .faq-answer ol {
        padding-left: 15px;
    }

    .faq-answer ol li {
        font-size: 0.9rem;
    }

    .faq-tip {
        padding: 10px;
    }

    .tip-text {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .faq {
        padding: 25px 0;
    }

    .faq h2 {
        font-size: 1.6rem;
        margin-bottom: 20px;
        padding-bottom: 8px;
    }

    .faq-card {
        padding: 15px;
        flex-direction: column;
        align-items: flex-start;
    }

    .faq-icon {
        margin-bottom: 15px;
    }

    .faq-content h3 {
        font-size: 1rem;
    }

    .faq-answer p,
    .faq-answer ol li {
        font-size: 0.85rem;
    }

    .faq-tip {
        padding: 8px;
    }

    .tip-text {
        font-size: 0.8rem;
    }
}

/* 页脚增强 */
.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.footer-section p {
    color: #ccc;
    margin: 10px 0;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        height: auto;
        padding: 20px;
    }

    .nav ul {
        margin-top: 20px;
    }

    .nav ul li {
        margin: 0 15px;
    }

    .hero {
        padding: 30px 0;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-text {
        text-align: center;
    }

    .hero-image {
        order: -1;
        margin-bottom: 20px;
        max-width: 300px;
    }

    .banner-img {
        max-height: 250px;
    }

    .download-buttons {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .btn {
        margin: 10px 0;
    }

    .feature-grid,
    .guide-steps {
        grid-template-columns: 1fr;
    }

    .faq-grid {
        grid-template-columns: 1fr;
    }

    .version-grid,
    .requirements-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .features {
        padding: 30px 0;
    }

    .feature-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }

    .feature-card {
        padding: 20px;
    }

    .feature-icon {
        width: 50px;
        height: 50px;
    }

    .feature-content h3 {
        font-size: 1.2rem;
    }

    .version-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
    }

    .version-header {
        padding: 20px;
    }

    .version-icon {
        width: 50px;
        height: 50px;
    }

    .version-icon .icon {
        width: 25px;
        height: 25px;
    }

    .version-header h3 {
        font-size: 1.3rem;
    }

    .version-content {
        padding: 20px;
    }

    .info-item {
        margin-bottom: 10px;
        padding-bottom: 10px;
    }

    .version-features li {
        margin-bottom: 10px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .nav ul {
        flex-direction: column;
        text-align: center;
    }

    .nav ul li {
        margin: 10px 0;
    }

    .hero {
        padding: 25px 0;
    }

    .hero-content h2 {
        font-size: 1.6rem;
    }

    .hero-content p {
        font-size: 0.9rem;
    }

    .hero-image {
        max-width: 250px;
    }

    .banner-img {
        max-height: 200px;
    }

    .version-info {
        font-size: 0.8rem;
    }

    .faq-item {
        padding: 20px;
    }

    .faq-item h3 {
        font-size: 1.2rem;
    }

    .features h2 {
        font-size: 1.8rem;
        margin-bottom: 25px;
        padding-bottom: 10px;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .feature-card {
        padding: 15px;
    }

    .feature-icon {
        width: 45px;
        height: 45px;
    }

    .feature-content h3 {
        font-size: 1.1rem;
    }

    .feature-list li {
        font-size: 0.85rem;
    }

    .versions {
        padding: 30px 0;
    }

    .versions h2 {
        font-size: 1.8rem;
        margin-bottom: 25px;
        padding-bottom: 10px;
    }

    .version-grid {
        grid-template-columns: 1fr;
    }

    .version-card {
        max-width: 400px;
        margin: 0 auto;
    }
}