:root {
    --primary-color: #4A90E2;
    --secondary-color: #2C3E50;
    --text-color: #333;
    --light-bg: #F5F7FA;
    --white: #FFFFFF;
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

/* 导航栏样式 */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: var(--white);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-img {
    height: 32px;
    width: auto;
    margin-right: 8px;
    vertical-align: middle;
}

.nav-links a {
    margin-left: 2rem;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
}

/* 英雄区域样式 */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, var(--primary-color), #6AB7FF);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white);
    padding: 0 1rem;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* 按钮样式 */
.cta-button, .download-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 30px;
    font-weight: 700;
    transition: transform 0.3s ease;
}

.cta-button:hover, .download-button:hover {
    transform: translateY(-3px);
}

/* 特色功能区域样式 */
.feature-section {
    padding: 5rem 5%;
}

.feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 5rem;
    gap: 2rem;
}

.feature-item.reverse {
    flex-direction: row-reverse;
}

.feature-content {
    flex: 1;
}

.feature-content h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.feature-image {
    flex: 1;
}

.feature-image img {
    width: 100%;
    max-width: 500px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* 浮动下载按钮 */
.floating-download {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
}

.download-button {
    background: var(--primary-color);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: 30px;
    box-shadow: 0 5px 15px rgba(74, 144, 226, 0.3);
}

/* 页脚样式 */
footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 2rem 5%;
    text-align: center;
}

/* 微信引导层样式 */
.wechat-tip {
    visibility: hidden;
    opacity: 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.wechat-tip.show {
    visibility: visible;
    opacity: 1;
}

.wechat-tip-content {
    position: absolute;
    top: 20px;
    right: 20px;
    background: #fff;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    color: #333;
}

.wechat-tip-arrow {
    position: absolute;
    top: -10px;
    right: 20px;
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid #fff;
}

.wechat-tip p {
    margin: 5px 0;
    font-size: 14px;
    line-height: 1.4;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .feature-item, .feature-item.reverse {
        flex-direction: column;
        text-align: center;
    }

    .feature-image img {
        max-width: 100%;
    }

    .nav-links {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }

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

    .feature-content h2 {
        font-size: 1.5rem;
    }
}