/* Compact Header Styles - 更紧凑的导航栏 */
.site-header {
    background: rgba(6, 12, 28, 0.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(0, 255, 255, 0.28);
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    /* 减少上下内边距 */
    padding: 0.5rem 0;  /* 原来是 1rem 0 */
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.45);
}

.site-header .nav-container {
    max-width: 1400px;  /* 增加最大宽度以提供更多空间 */
    margin: 0 auto;
    /* 适度的左右内边距 */
    padding: 0 1.5rem;  /* 恢复一些padding */
    display: flex;
    align-items: center;
    justify-content: space-between;
    /* 优化元素间距 */
    gap: 1.5rem;  /* 增加logo和菜单之间的间距 */
    flex-wrap: nowrap;
}

.site-header .logo {
    display: inline-flex;
    align-items: center;
}

.site-header .logo-img {
    /* 减小logo高度 */
    height: 32px;  /* 原来是 40px */
    width: auto;
    display: block;
}

.site-header .nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    /* 适度的菜单项间距，避免过度压缩 */
    gap: 0.5rem;  /* 减少间距但保持可读性 */
    padding: 0;
    margin: 0;
    flex-wrap: wrap;  /* 允许换行以防止截断 */
}

.site-header .nav-menu li {
    white-space: nowrap;
    flex-shrink: 0;  /* 防止菜单项被压缩 */
}

.site-header .nav-menu a {
    color: #eef6ff;
    text-decoration: none;
    /* 适当的内边距，确保文字完整显示 */
    padding: 0.35rem 0.6rem;  /* 调整内边距 */
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 600;
    /* 适中的字体大小 */
    font-size: 0.9rem;  /* 稍微减小但保持可读性 */
    letter-spacing: 0;  /* 移除字母间距以节省空间 */
    transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease;
    display: inline-block;
    min-width: fit-content;  /* 确保内容不被截断 */
}

.site-header .nav-menu a:hover,
.site-header .nav-menu a.active {
    color: #00f6ff;
    border-color: rgba(0, 255, 255, 0.45);
    background: rgba(0, 255, 255, 0.14);
    box-shadow: 0 0 18px rgba(0, 255, 255, 0.25);
}

.site-header .menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4px;  /* 原来是 6px */
    /* 减小汉堡菜单按钮尺寸 */
    width: 38px;  /* 原来是 46px */
    height: 38px;  /* 原来是 46px */
    border-radius: 8px;
    border: 1px solid rgba(0, 255, 255, 0.45);
    background: rgba(4, 18, 40, 0.65);
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header .menu-toggle span {
    width: 18px;  /* 原来是 22px */
    height: 2px;
    border-radius: 2px;
    background: #00e1ff;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header .menu-toggle:hover {
    border-color: rgba(0, 255, 255, 0.8);
    box-shadow: 0 0 16px rgba(0, 255, 255, 0.35);
}

.site-header .menu-toggle:focus-visible {
    outline: 2px solid #00ffff;
    outline-offset: 3px;
}

.site-header .menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);  /* 调整为 6px */
}

.site-header .menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.site-header .menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);  /* 调整为 6px */
}

.site-header .nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;  /* 原来是 0.75rem */
    flex-shrink: 0;  /* 防止按钮区域被压缩 */
}

/* 调整按钮在header中的样式 */
.site-header .nav-actions .btn {
    /* 减小按钮尺寸 */
    padding: 0.5rem 1.25rem !important;  /* 覆盖默认按钮样式 */
    font-size: 0.95rem !important;
    min-width: 110px;  /* 原来是 140px */
    text-align: center;
    margin: 0 !important;  /* 移除默认margin */
}

.site-header .nav-actions .btn-secondary {
    border-color: rgba(0, 255, 255, 0.5);
    color: #00ffff;
}

.site-header .nav-actions .btn-secondary:hover {
    background: rgba(0, 255, 255, 0.12);
}

/* 大屏幕优化 - 确保菜单项不被截断 */
@media (min-width: 1200px) {
    .site-header .nav-menu {
        gap: 0.8rem;  /* 大屏幕稍微增加间距 */
    }

    .site-header .nav-menu a {
        padding: 0.4rem 0.8rem;
        font-size: 0.95rem;
    }
}

/* 平板响应式 */
@media (max-width: 1024px) {
    .site-header .nav-menu {
        gap: 0.3rem;  /* 平板稍微减少间距 */
        flex-wrap: nowrap;  /* 平板尽量不换行 */
        overflow-x: auto;  /* 如果需要可以横向滚动 */
    }

    .site-header .nav-menu a {
        padding: 0.3rem 0.5rem;
        font-size: 0.85rem;  /* 平板稍微减小字体 */
    }

    .site-header .nav-actions .btn {
        min-width: 90px;  /* 减小按钮最小宽度 */
        padding: 0.4rem 0.8rem !important;
        font-size: 0.85rem !important;
    }
}

/* 小平板优化 */
@media (max-width: 900px) {
    .site-header .nav-menu {
        display: none;  /* 900px以下隐藏菜单，显示汉堡菜单 */
    }

    .site-header .menu-toggle {
        display: flex;
    }
}

/* 移动端响应式 */
@media (max-width: 768px) {
    .site-header {
        padding: 0.4rem 0;  /* 原来是 0.75rem 0 */
    }

    .site-header .nav-container {
        padding: 0 0.75rem;  /* 原来是 0 1.1rem */
        flex-wrap: wrap;
        gap: 0.5rem;  /* 原来是 0.75rem */
    }

    .site-header .logo-img {
        height: 28px;  /* 原来是 36px */
    }

    .site-header .menu-toggle {
        display: flex;
    }

    .site-header .nav-menu {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0.25rem;
        margin-top: 0.75rem;
        padding-top: 0.75rem;
        border-top: 1px solid rgba(0, 255, 255, 0.2);
    }

    .site-header .nav-menu.active {
        display: flex;
    }

    .site-header .nav-menu li {
        width: 100%;
    }

    .site-header .nav-menu a {
        display: block;
        width: 100%;
        padding: 0.5rem 1rem;  /* 原来是 0.65rem 1rem */
        text-align: center;
        font-size: 0.95rem;
    }

    .site-header .nav-actions {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0.5rem;
        margin-top: 0.75rem;
    }

    .site-header .nav-actions.active {
        display: flex;
    }

    .site-header .nav-actions .btn {
        flex: 1 1 100%;
        width: 100%;
        padding: 0.5rem 1rem !important;  /* 原来是 0.65rem 1rem */
        font-size: 0.95rem !important;
    }
}

/* 超小屏幕优化 */
@media (max-width: 480px) {
    .site-header {
        padding: 0.35rem 0;
    }

    .site-header .nav-container {
        padding: 0 0.5rem;
    }

    .site-header .logo-img {
        height: 26px;
    }

    .site-header .menu-toggle {
        width: 35px;
        height: 35px;
    }

    .site-header .nav-menu a {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }

    .site-header .nav-actions .btn {
        padding: 0.45rem 0.9rem !important;
        font-size: 0.9rem !important;
    }
}

/* 调整hero区域，因为header更紧凑了 */
.hero {
    /* 减少顶部padding以配合更紧凑的header */
    padding: 80px 2rem 2rem;  /* 原来是 120px 2rem 2rem */
}

@media (max-width: 768px) {
    .hero {
        padding: 60px 1rem 1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 50px 0.75rem 0.75rem;
    }
}