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

/* 浅色模式变量 - 优化颜色搭配 */
:root {
    --primary-color: #4a6cf7;
    --secondary-color: #5a6c7d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --light-color: #f8f9fa;
    --dark-color: #2c3e50;
    --text-color: #34495e;
    --background-color: #ffffff;
    --card-background: #f8f9fa;
    --border-color: #e9ecef;
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --transition: all 0.2s ease;
}

/* 深色模式变量 */
[data-theme="dark"] {
    --primary-color: #6b8aff;
    --secondary-color: #adb5bd;
    --success-color: #37b24d;
    --danger-color: #f03e3e;
    --warning-color: #ffd43b;
    --light-color: #343a40;
    --dark-color: #f8f9fa;
    --text-color: #e9ecef;
    --background-color: #121212;
    --card-background: #1e1e1e;
    --border-color: #343a40;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    overflow-x: hidden;
    transition: background-color 0.3s ease;
    /* 启用硬件加速 */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    will-change: background-color;
}

/* 确保所有文本元素在深色模式下有良好的对比度 */
h1, h2, h3, h4, h5, h6 {
    color: var(--dark-color);
}

p, li {
    color: var(--text-color);
}

/* 链接在深色模式下的样式 */
a {
    color: var(--primary-color);
}

/* 确保表单元素在深色模式下有正确的颜色 */
input, select, textarea, button {
    background-color: var(--card-background);
    color: var(--text-color);
    border-color: var(--border-color);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #3a5ce7;
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--background-color);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--primary-color);
  }
  
  [data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: #5a75e0;
  }

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

/* 主题切换按钮样式 */
.theme-toggle {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--card-background);
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--box-shadow);
}

.theme-toggle:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    fill: var(--primary-color);
    transition: var(--transition);
}

.theme-toggle:hover svg {
    fill: white;
}

[data-theme="dark"] .theme-toggle svg {
    fill: var(--primary-color);
}

[data-theme="dark"] .theme-toggle:hover svg {
    fill: white;
}

/* 导航栏样式 */
.navbar {
    background-color: var(--card-background);
    box-shadow: var(--box-shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    will-change: transform, box-shadow;
}

/* 导航栏滚动样式 - 使用CSS类代替JS内联样式 */
.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 20px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary-color);
}

.mobile-menu {
    display: none;
    cursor: pointer;
}

.menu-icon {
    width: 30px;
    height: 3px;
    background-color: var(--text-color);
    position: relative;
    transition: var(--transition);
}

.menu-icon::before,
.menu-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background-color: var(--text-color);
    transition: var(--transition);
}

.menu-icon::before {
    top: -8px;
}

.menu-icon::after {
    bottom: -8px;
}

/* 英雄区域样式 - 优化背景色 */
.hero {
    background: linear-gradient(135deg, #5b7fff 0%, #3a60e6 100%);
    color: white;
    padding: 120px 0 80px;
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.hero-content {
    flex: 1;
    min-width: 300px;
    margin-bottom: 40px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.version-badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.2);
    padding: 5px 15px;
    border-radius: 20px;
    margin-bottom: 30px;
    font-size: 0.9rem;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.download-btn,
.learn-more-btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    font-size: 1rem;
}

.download-btn {
    background-color: var(--success-color);
    color: white;
    border: none;
}

.download-btn:hover {
    background-color: #218838;
    transform: translateY(-2px);
}

.learn-more-btn {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

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

.hero-image {
    flex: 1;
    min-width: 300px;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    /* 移除无限循环动画，使用更轻量级的悬停效果 */
    transition: transform 0.3s ease;
}

.hero-image img:hover {
    transform: translateY(-10px);
}

/* 功能特点样式 */
.features {
    padding: 80px 0;
    background-color: var(--card-background);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--dark-color);
}

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

.feature-card {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
}

.feature-card .icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.feature-card .icon svg {
    width: 40px;
    height: 40px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.feature-card p {
    color: var(--secondary-color);
}

/* 下载区域样式 */
.download-section {
    padding: 80px 0;
    background-color: var(--background-color);
}

.download-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--dark-color);
}

.download-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-bottom: 40px;
}

.download-info p {
    background-color: var(--card-background);
    padding: 10px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    font-weight: 500;
}

.download-button-container {
    text-align: center;
    margin-bottom: 40px;
}

.main-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: var(--primary-color);
    color: white;
    padding: 20px 40px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.main-download-btn:hover {
    background-color: #3a5ce7;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(74, 108, 247, 0.3);
}

.main-download-btn svg {
    width: 24px;
    height: 24px;
}

.download-tips {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    max-width: 600px;
    margin: 0 auto;
}

.download-tips h4 {
    color: var(--warning-color);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.download-tips ul {
    list-style: none;
    padding-left: 0;
}

.download-tips li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.download-tips li::before {
    content: '•';
    color: var(--primary-color);
    font-size: 1.5rem;
    position: absolute;
    left: 0;
    top: -5px;
}

/* 权限说明样式 */
.permissions-section {
    padding: 80px 0;
    background-color: var(--card-background);
}

.permissions-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--dark-color);
}

.permissions-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    margin-bottom: 30px;
}

.permission-item {
    background-color: var(--background-color);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    flex: 1;
    min-width: 250px;
    max-width: 400px;
}

.permission-item h4 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

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

.permission-item li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: var(--secondary-color);
}

.permission-item li::before {
    content: '✓';
    color: var(--success-color);
    position: absolute;
    left: 0;
}

.more-permissions {
    display: block;
    text-align: center;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    margin-top: 20px;
}

.more-permissions:hover {
    text-decoration: underline;
}

/* 常见问题样式 */
.faq-section {
    padding: 80px 0;
    background-color: var(--background-color);
}

.faq-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--dark-color);
}

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

.faq-item {
    margin-bottom: 20px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-question {
    background-color: var(--card-background);
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.faq-question:hover {
    background-color: var(--primary-color);
    color: white;
}

.faq-question svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.faq-answer {
    background-color: var(--card-background);
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

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

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

/* 关于我们样式 */
.about-section {
    padding: 80px 0;
    background-color: var(--card-background);
}

.about-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--dark-color);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 30px;
    color: var(--secondary-color);
}

.about-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.about-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 5px 10px;
    border-radius: 4px;
}

.about-links a:hover {
    background-color: var(--primary-color);
    color: white;
}

/* 页脚样式 */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 50px 0 30px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 30px;
}

.footer-info {
    flex: 1;
    min-width: 200px;
    margin-bottom: 20px;
}

.footer-info p {
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    flex: 2;
    justify-content: center;
    min-width: 300px;
    margin-bottom: 20px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: white;
}

.contact-info {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
}

.contact-info p {
    display: inline-block;
    margin: 0 15px 10px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--card-background);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 10px 0;
    }

    .mobile-menu {
        display: block;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

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

    .features h2,
    .download-section h2,
    .permissions-section h2,
    .faq-section h2,
    .about-section h2 {
        font-size: 2rem;
    }

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

    .footer-links {
        justify-content: center;
    }

    .contact-info p {
        display: block;
        margin: 5px 0;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .download-btn,
    .learn-more-btn {
        width: 100%;
        text-align: center;
    }

    .main-download-btn {
        padding: 15px 30px;
        font-size: 1rem;
    }

    .features h2,
    .download-section h2,
    .permissions-section h2,
    .faq-section h2,
    .about-section h2 {
        font-size: 1.8rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease forwards;
    opacity: 0;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}

.delay-4 {
    animation-delay: 0.8s;
}