/* 全局样式 */
:root {
    --primary-color: #1a73e8;
    --secondary-color: #4285f4;
    --text-color: #333;
    --light-text: #666;
    --background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    --banner-gradient: linear-gradient(135deg, #1a73e8, #4285f4);
}

* {
    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: var(--text-color);
    background: var(--background);
}

/* 导航栏样式 */
.main-nav {
    background: rgba(255, 255, 255, 0.95);
    padding: 1rem 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-color);
}

/* Banner样式 */
.banner {
    position: relative;
    height: 50vh; /* 子页面banner高度 */
    background: var(--banner-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    overflow: hidden;
}

/* 主页banner样式 */
.home-banner {
    height: 100vh; /* 主页banner全屏高度 */
}

#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.banner-content {
    position: relative;
    z-index: 1;
    padding: 2rem;
}

.banner h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.banner p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

/* 下载按钮样式 */
.download-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    text-decoration: none;
    transition: all 0.3s;
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.download-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

/* 特性列表样式 */
.feature-list {
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    background: white;
    border-radius: 16px;
    padding: 3rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    gap: 4rem;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.12);
}

.feature-content {
    flex: 0 0 60%;
    padding-right: 2rem;
}

.feature-content h2 {
    font-size: 2.2rem;
    margin-bottom: 1.2rem;
    color: var(--primary-color);
    font-weight: 600;
}

.feature-content p {
    color: var(--light-text);
    font-size: 1.15rem;
    line-height: 1.8;
    margin: 0;
}

.feature-image {
    flex: 0 0 40%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.feature-image img {
    width: 100%;
    max-width: 200px;
    height: auto;
    border-radius: 12px;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 4px 8px rgba(26, 115, 232, 0.2));
}

.feature-item:hover .feature-image img {
    transform: scale(1.05);
    filter: drop-shadow(0 6px 12px rgba(26, 115, 232, 0.3));
}

/* 响应式设计优化 */
@media (max-width: 1024px) {
    .feature-item {
        padding: 2rem;
        gap: 2rem;
    }

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

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

@media (max-width: 768px) {
    .feature-item {
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
    }

    .feature-content {
        flex: 1;
        padding-right: 0;
        padding-bottom: 1rem;
        text-align: center;
    }

    .feature-image {
        flex: 1;
        width: 100%;
        max-width: 200px;
        margin: 0 auto;
    }

    .feature-image img {
        max-width: 150px;
    }

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

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

/* 页脚样式 */
footer {
    background: #333;
    color: white;
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    margin: 0 0.5rem;
}

.footer-links a:hover {
    text-decoration: underline;
}

.contact-info {
    margin-bottom: 1rem;
    color: #999;
}

.icp a {
    color: #999;
    text-decoration: none;
}

.icp a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-nav {
        padding: 1rem;
    }

    .main-nav ul {
        display: none;
    }

    .banner h1 {
        font-size: 2.5rem;
    }

    .banner p {
        font-size: 1.2rem;
    }

    .feature-item {
        flex-direction: column;
        padding: 1.5rem;
    }

    .feature-content {
        padding-right: 0;
        padding-bottom: 1.5rem;
        text-align: center;
    }

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