header {
    position: fixed;
    z-index: 1000;
    top: 0; // 始终保持在顶部
    left: 0;
    right: 0;
    width: 100%;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    background-color: rgba(0, 0, 0, 0.11);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
    font-family: 'DouyinSans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    transition: transform 0.3s ease;
    height: 60px; // 固定高度
    // 导航容器
    nav {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 1rem;
    }

    // 菜单列表 - 强制横向显示且不换行
    ul {
        list-style: none;
        display: flex;
        flex-direction: row;
        justify-content: center;
        align-items: center;
        flex-wrap: nowrap; // 修改：不允许换行
        gap: 1rem;
        padding: 0.5rem 1rem;
        margin: 0;
        overflow-x: auto; // 添加横向滚动以适应小屏幕
        scrollbar-width: none; // 隐藏滚动条(Firefox)
        -ms-overflow-style: none; // 隐藏滚动条(IE/Edge)

        &::-webkit-scrollbar {
            display: none; // 隐藏滚动条(Chrome/Safari)
        }
    }

    li {
        position: relative;
        padding: 0.3rem 0.5rem; // 减小内边距
        transition: all 0.3s ease;
        flex-shrink: 0; // 防止项目被压缩
    }

    a, button.search-toggle-btn {
        position: relative;
        text-decoration: none;
        color: #e1e1ff;
        font-weight: 500;
        padding: 0.25rem 0;
        display: inline-flex;
        align-items: center;
        font-size: 1.1rem; // 稍微减小字体大小，方便移动端显示
        white-space: nowrap; // 强制文字不换行
        background: none;
        border: none;
        cursor: pointer;

        &::before {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #00ffff, #66ffff);
            transition: width 0.3s ease-in-out;
        }

        &:hover, &.active {
            color: #fff;

            &::before {
                width: 100%;
            }
        }
    }

    .menu-icon {
        width: 22px;
        height: 22px;
        vertical-align: middle;
        margin-right: 8px;
    }

    // 汉堡菜单按钮调整
    .hamburger {
        display: none; // 大屏幕下隐藏
        flex-direction: column;
        justify-content: space-between;
        width: 25px;
        height: 18px;
        position: absolute;
        right: 20px;
        top: 20px;
        cursor: pointer;
        z-index: 100;
        padding: 10px;
        background: none;
        border: none;

        span {
            display: block;
            height: 2px;
            width: 100%;
            background-color: #e1e1ff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        &.active {
            span:nth-child(1) {
                transform: translateY(8px) rotate(45deg);
            }

            span:nth-child(2) {
                opacity: 0;
            }

            span:nth-child(3) {
                transform: translateY(-8px) rotate(-45deg);
            }
        }
    }
}

// 修改响应式设计，保持菜单横向显示
@media (max-width: 768px) {
    header {
        ul {
            flex-direction: column; // 垂直排列菜单项
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background-color: rgba(10, 10, 15, 0.95);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            padding: 4rem 1rem 2rem;
            gap: 1.2rem;
            transform: translateY(-100%);
            transition: transform 0.3s ease;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
            z-index: 5;
            flex-wrap: nowrap; // 确保不换行
            overflow-y: auto; // 添加纵向滚动以适应很多菜单项
            max-height: 80vh; // 限制最大高度
        }

        ul.active {
            transform: translateY(0);
        }

        .hamburger {
            display: flex; // 小屏幕上显示汉堡菜单
            top: 15px; // 位置调整
        }

        li {
            width: 100%; // 每个菜单项占满宽度
            text-align: center;
            padding: 0.5rem 0;
        }

        a, button.search-toggle-btn {
            justify-content: center; // 文字居中
            width: auto; // 宽度自适应内容
            display: inline-flex; // 内联弹性布局
            font-size: 1.1rem; // 保持合适的字体大小
            padding: 0.25rem 1rem; // 添加水平内边距
            white-space: nowrap; // 再次确认文字不换行

            .menu-icon {
                width: 20px;
                height: 20px;
                margin-right: 8px;
            }

            &::before {
                bottom: -3px;
            }
        }
    }
}

// 滚动时隐藏导航
header.scroll-down {
    transform: translateY(-100%);
}

// 搜索结果样式保持不变
#search-results {
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    max-width: 600px;
    background: rgba(0, 0, 0, 0.8);
    border-radius: 5px;
    padding: 1rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
}

.search-result-item {
    margin-bottom: 1rem;
}

.search-result-item a {
    color: #00ffff;
    text-decoration: none;
}

.search-result-item a:hover {
    text-decoration: underline;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.3);  // 增大缩放比例
        opacity: 1;
    }
    100% {
        transform: scale(1);
        opacity: 0.8;
    }
}

@keyframes breathing {
    0% {
        filter: drop-shadow(0 0 3px rgba(66,185,231,0.3));
    }
    50% {
        filter: drop-shadow(0 0 15px rgba(66,185,231,1));  // 增强发光效果
    }
    100% {
        filter: drop-shadow(0 0 3px rgba(66,185,231,0.3));
    }
}