* {
    margin: 0;
    padding: 0;
    box-sizing: border-box
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    font-size: 16px
}
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px
}
.site-header {
    background-color: #fff;
    border-bottom: 1px solid #e5e5e5;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05)
}
.header-content {
    display: flex;
    justify-content: flex-start; /* 改为左对齐 */
    align-items: center;
    position: relative;
    gap: 60px; /* 增加 Logo 与导航之间的间距，从而产生向中间挤压的效果 */
}
.site-logo .logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #333
}
.logo-img {
    height: 40px;
    width: auto;
    margin-right: 10px
}
.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: #333
}
.main-navigation .nav-menu {
    display: flex;
    list-style: none;
    gap: 30px; /* 从 30px 增加到 40px */
}
.main-navigation .nav-menu li a {
    text-decoration: none;
    color: #333;
    font-size: 20px; /* 从 16px 放大到 18px */
    font-weight: 500; /* 增加一点字重，看起来更有质感 */
    padding: 15px 0; /* 增加上下点击范围 */
    transition: color 0.3s;
}
.main-navigation .nav-menu li a:hover {
    color: #1880ff
}
.section-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #1a1a1a;
    line-height: 1.3;
    letter-spacing: -0.5px
}
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px)
    }
    to {
        opacity: 1;
        transform: translateY(0)
    }
}
.fade-in {
    animation: fadeIn 0.6s ease-out
}
@media (max-width: 1024px) {
    .container {
        max-width: 960px
    }
    .section-title {
        font-size: 32px
    }
}
@media (max-width: 768px) {
    .container {
        padding: 0 20px
    }
    .header-content {
        flex-direction: column;
        gap: 20px
    }
    .main-navigation .nav-menu {
        flex-direction: column;
        gap: 15px;
        text-align: center
    }
    .blog-section {
        padding: 40px 0
    }
    .blog-list {
        grid-template-columns: 1fr;
        gap: 20px
    }
    .blog-load-more-wrapper {
        margin-top: 30px !important
    }
    .btn {
        padding: 10px 24px;
        font-size: 14px
    }
}
@media (max-width: 480px) {
    .container {
        padding: 0 15px
    }
    .blog-thumbnail {
        height: 180px
    }
    .blog-date {
        padding: 15px 15px 0 15px
    }
    .blog-title {
        padding: 0 15px
    }
    .blog-excerpt {
        padding: 0 15px 15px
    }
    .section-title {
        font-size: 24px
    }
}

/* 网站底部样式 - 优化版 */
.site-footer {
    background: #1a1a1a;
    color: #fff;
    padding: 60px 0 30px;
    font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
    line-height: 1.6;
    clear: both;
    text-align: left;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.footer-top {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
    gap: 40px;
}

.footer-brand {
    flex: 1.2;
    min-width: 280px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 15px;
    letter-spacing: -.5px;
}

.footer-slogan {
    font-size: 14px;
    color: #b0b0b0;
    max-width: 320px;
    margin: 0 0 20px;
    line-height: 1.8;
}

.footer-btn {
    display: inline-block;
    background: #1e88e5;
    color: #fff;
    padding: 10px 24px;
    border-radius: 999px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: .3s;
    box-shadow: 0 4px 14px rgba(30,136,229,.3);
}

.footer-btn:hover {
    background: #1565c0;
    transform: translateY(-1px);
}

.footer-nav-group {
    flex: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 60px;
    justify-content: flex-end;
    min-width: 300px;
}

.footer-column {
    min-width: 120px;
}

.footer-column h4 {
    font-size: 16px;
    color: #fff;
    margin: 0 0 20px;
    font-weight: 600;
}

.footer-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: #999;
    text-decoration: none;
    font-size: 14px;
    transition: .3s;
}

.footer-column a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1);
    padding-top: 30px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    font-size: 13px;
    color: #666;
}

.footer-legal {
    display: flex;
    gap: 25px;
}

.footer-legal a {
    color: #666;
    text-decoration: none;
    transition: .3s;
}

.footer-legal a:hover {
    color: #999;
}

.secure-tag {
    color: #1e88e5;
    font-weight: 500;
}

@media(max-width:768px) {
    .footer-container {
        padding: 0 20px;
    }
    .footer-top {
        flex-direction: column;
        gap: 30px;
    }
    .footer-nav-group {
        justify-content: flex-start;
        gap: 40px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* 1. 布局调整：Logo 居左，导航栏整体居中 */
.header-content {
    display: flex;
    justify-content: flex-start; 
    align-items: center;
    position: relative;
}

.site-logo {
    z-index: 2; /* 确保 Logo 在最上层 */
}

.main-navigation {
    flex-grow: 1; /* 让导航栏占据剩余空间 */
    display: flex;
    justify-content: center; /* 核心：让内部菜单居中 */
}

/* 2. 导航栏样式：放大字体与增加悬停底色框 */
.main-navigation .nav-menu {
    display: flex;
    list-style: none;
    gap: 10px; /* 减小直接间距，留给 padding 使用 */
}

.main-navigation .nav-menu li a {
    text-decoration: none;
    color: #333;
    font-size: 18px; /* 字体放大 */
    font-weight: 500;
    padding: 8px 20px; /* 增加左右内边距，方便承载蓝色底框 */
    border-radius: 8px; /* 圆角底框 */
    transition: all 0.3s ease; /* 平滑过渡 */
}

/* 3. 悬停效果：蓝色底色框 */
.main-navigation .nav-menu li a:hover {
    color: #1880ff;
    background-color: rgba(24, 128, 255, 0.1); /* 浅蓝色半透明底框 */
}