:root {
    --dark-blue: #0a1525;
    --accent-red: #e62e2e;
    --text-light: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--dark-blue);
    color: var(--text-light);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 顶部导航栏 */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
}

.logo {
    font-size: 18px;
    font-weight: 500;
}

.nav-right .nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
}

/* 主要内容区域 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
}

.hero-section {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.main-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 特性列表 */
.features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-icon {
    color: var(--text-secondary);
}

.feature-text {
    font-size: 14px;
    color: var(--text-secondary);
}

/* CTA按钮 */
.cta-button {
    display: inline-block;
    background-color: var(--accent-red);
    color: white;
    padding: 12px 40px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: #c42121;
}

/* 帮助文本 */
.help-text {
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
}

.help-icon {
    font-size: 16px;
}

/* 下载区域 */
.download-section {
    margin-top: 60px;
    width: 100%;
    max-width: 600px;
}

.download-row {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.download-item {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    height: 50px;
    transition: transform 0.3s;
}

.download-item:hover {
    transform: translateY(-5px);
}

.download-icon {
    width: 100%;
    height: auto;
    opacity: 0.8;
    transition: opacity 0.3s;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    padding: 10px;
    box-sizing: border-box;
}

.download-icon:hover {
    opacity: 1;
}

/* 推荐链接区域 */
.recommended-sites {
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    width: 100%;
    max-width: 800px;
    text-align: center;
}

.sites-title {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.sites-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
    line-height: 1.8;
}

.site-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.site-link:hover {
    color: var(--text-light);
    text-decoration: underline;
}

.divider {
    color: var(--border-color);
    margin: 0 5px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .top-header {
        padding: 15px 20px;
    }

    .main-title {
        font-size: 36px;
    }

    .hero-description {
        font-size: 16px;
    }

    .features {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .download-row {
        gap: 20px;
    }

    .download-item {
        width: 40px;
        height: 40px;
    }

    .sites-list {
        flex-direction: column;
        align-items: center;
    }

    .divider {
        display: none;
    }
}

/* 添加一些动画效果 */
.main-title, .hero-description, .features, .cta-button, .help-text {
    animation: fadeIn 0.8s ease-out forwards;
}

.hero-description {
    animation-delay: 0.2s;
}

.features {
    animation-delay: 0.4s;
}

.cta-button {
    animation-delay: 0.6s;
}

.help-text {
    animation-delay: 0.8s;
}

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

/* 添加一些微妙的背景效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(30, 60, 114, 0.2), transparent 70%),
                radial-gradient(circle at bottom left, rgba(30, 60, 114, 0.2), transparent 70%);
    z-index: -1;
}