:root {
    --primary-color: #4e54c8;
    --secondary-color: #8f94fb;
    --accent-color: #00d4ff;
    --text-color: #2d3748;
    --light-bg: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.9);
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

/* 超链接去除下划线 */
a {
    text-decoration: none;
}


body {
    background: linear-gradient(135deg, var(--light-bg) 0%, #e2e8f0 100%);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 5%;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%,
            rgba(78, 84, 200, 0.1) 0%,
            transparent 50%),
        radial-gradient(circle at 80% 30%,
            rgba(0, 212, 255, 0.1) 0%,
            transparent 50%);
    z-index: -1;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top,
        var(--light-bg) 0%,
        transparent 100%);
    z-index: -1;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    margin-left: 0;
    transform: none;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, 
        var(--primary-color), 
        var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-right: 1rem;
}

.btn.primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(78, 84, 200, 0.4);
}

.btn.secondary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 功能区域样式 */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

/* 下载区域样式 */
.download {
    padding: 2rem;
    text-align: center;
}

.download-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    max-width: 500px;
    margin: 0 auto;
}

.download-card h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.qr-code {
    width: 200px;
    height: 200px;
    margin: 2rem auto;
    background: #f0f0f0;
    border-radius: 1rem;
}

.download-btn {
    display: block;
    margin: 0 auto;
    width: 200px;
}

.version-info {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 0;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
    }
    
    .hero-content {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        flex: 1;
        width: 100%;
        padding: 0 1rem;
        margin: 0;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
        margin: 0;
    }
    
    .download {
        padding: 1.5rem 1rem;
    }
}

/* 移动端菜单 */
.menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    z-index: 1000;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--primary-color);
    margin: 6px 0;
    transition: all 0.3s ease;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
}

/* 模态窗口响应式 */
@media (max-width: 768px) {
    .modal-content {
        margin: 0;
        border-radius: 0;
        min-height: 100vh;
        padding: 1rem;
    }
    
    .modal-iframe {
        height: calc(100vh - 60px);
    }
    
    .close-modal {
        font-size: 2rem;
        top: 0.5rem;
        right: 0.5rem;
    }
}
.ssl-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 2rem 0;
    width: 100%;
}