/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 全局样式 */
body {
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

h1, h2, h3, h4 {
    text-align: center;
    font-weight: 600;
    margin-bottom: 1rem;
}

h1 {
    font-size: 1.8rem;
}

h2 {
    font-size: 2.2rem;
}

h3 {
    font-size: 1.8rem;
    color: #222;
}

h4 {
    font-size: 1.2rem;
    color: #444;
}

p {
    text-align: left;
    margin-bottom: 1rem;
    color: #666;
}

a {
    text-decoration: none;
    color: #165DFF;
    transition: all 0.3s ease;
}

a:hover {
    color: #0e42c2;
}

/* 页头样式 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 999;
}

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

.header-logo h1 {
    margin: 0;
    font-size: 1.5rem;
    color: #165DFF;
}

/* 汉堡按钮样式 */
.hamburger-btn {
    display: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
}

.hamburger-icon {
    width: 30px;
    height: 30px;
}

/* 导航菜单样式 */
.header-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.header-nav a {
    color: #333;
    padding: 0.5rem 0;
    position: relative;
}

.header-nav a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #165DFF;
    transition: width 0.3s ease;
}

.header-nav a:hover::after {
    width: 100%;
}

/* 英雄区样式 */
.hero {
    background: linear-gradient(135deg, #e8f4ff 0%, #f0f8ff 100%);
    padding: 4rem 0;
    text-align: center;
    margin-bottom: 3rem;
    border-radius: 0 0 20px 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.hero h2 {
    margin-bottom: 1.5rem;
    color: #165DFF;
}

.hero p {
    text-align: center;
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
    color: #555;
}

/* 核心价值区块样式 */
.core-value {
    padding: 3rem 0;
    margin-bottom: 3rem;
}

.value-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.value-item {
    background-color: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.value-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

/* 文章区块样式 */
.article-section {
    padding: 3rem 0;
    background-color: #fff;
    margin-bottom: 3rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.article-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* APP下载区块样式 */
.download-section {
    padding: 3rem 0;
    text-align: center;
    background: linear-gradient(135deg, #165DFF 0%, #4080ff 100%);
    color: #fff;
    border-radius: 12px;
    margin-bottom: 3rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.download-section h3, .download-section p {
    color: #fff;
    text-align: center;
}

.download-btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: #fff;
    color: #165DFF;
    border-radius: 8px;
    font-weight: 600;
    margin-top: 1.5rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.download-btn:hover {
    background-color: #f0f8ff;
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

/* 页尾样式 */
.footer {
    background-color: #222;
    color: #fff;
    padding: 3rem 0 1.5rem;
}

.footer-main {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h4 {
    color: #fff;
    border-bottom: 2px solid #165DFF;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
    text-align: left;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 0.8rem;
}

.footer-col a {
    color: #ccc;
}

.footer-col a:hover {
    color: #165DFF;
}

.qrcode img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 1.5rem 0;
    border-top: 1px solid #444;
    border-bottom: 1px solid #444;
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: #ccc;
}

.footer-links a:hover {
    color: #165DFF;
}

.footer-copyright {
    text-align: center;
    color: #999;
    font-size: 0.9rem;
}

/* 响应式样式 - 移动端（768px以下） */
@media (max-width: 768px) {
    /* 汉堡按钮显示 */
    .hamburger-btn {
        display: flex;
    }

    /* 导航菜单默认隐藏 */
    .header-nav {
        position: fixed;
        top: 0;
        right: 0;
        width: 80%;
        height: 100vh;
        background-color: #fff;
        padding: 3rem 2rem;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 998;
        box-shadow: -2px 0 8px rgba(0,0,0,0.1);
    }

    .header-nav.active {
        transform: translateX(0);
    }

    .header-nav ul {
        flex-direction: column;
        gap: 1.5rem;
    }

    .header-nav li {
        background-color: #f5f7fa;
        padding: 1rem;
        border-radius: 8px;
    }

    /* 核心价值区块适配 */
    .value-list {
        grid-template-columns: 1fr;
    }

    /* 页尾主分类适配 - 一行两个 */
    .footer-main {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 字体适配 */
    h2 {
        font-size: 1.8rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    /* 页尾链接适配 */
    .footer-links {
        flex-wrap: wrap;
        gap: 1rem;
        padding: 1rem 0;
    }

    .footer-links a {
        flex: 1 1 40%;
        text-align: center;
        padding: 0.5rem 0;
    }
}

/* 小屏移动端（480px以下） */
@media (max-width: 480px) {
    .footer-main {
        grid-template-columns: 1fr;
    }

    .hero {
        padding: 2.5rem 0;
    }

    .download-btn {
        width: 90%;
    }
}