/* 头部样式 */ header { position: fixed; top: 0; left: 0; width: 100%; background-color: #ffffff; color: #fff; padding: 10px; display: flex; justify-content: space-between; align-items: center; z-index: 3000; transition: all 1s ease; /* 过渡效果 */ } /* 按钮的基础样式 */ header .toggle-menu { display: inline-block; font-size: 24px; background: none; border: none; color: rgb(235, 10, 10); cursor: pointer; margin-right: 20px; /* 设置右边距 */ transition: transform 0.3s ease-in-out; /* 平滑过渡效果 */ } /* 悬停效果,按钮背景颜色变化 */ header .toggle-menu:hover { background-color: rgba(235, 10, 10, 0.1); } /* 头部全屏按钮样式(仅大屏幕显示) */ #fullscreen-button { position: absolute; right: 12px; top: 0px; background: none; border: none; cursor: pointer; display: flex; align-items: center; transition: top 0.3s ease,transform 0.3s ease-in-out, padding 0.3s ease-in-out; /* 平滑放大动画 */ transform-origin: center center; /* 确保放大时的中心不变 */ } #fullscreen-button:hover { transform: scale(1.20); /* 悬停时上下左右均匀放大 20% */ } #search-input { height: 20px; width: 500px; display: inline-block; border: 1px solid #ccc; border-radius: 20px; padding: 5px 15px; transition: width 0.3s ease, padding 0.3s ease, top 0.3s ease; /* 加入 top 过渡效果 */ outline: none; background-color: #fff; text-align: center; margin-bottom: 20px; position: fixed; /* 固定定位 */ top: 10px; /* 初始位置距离顶部10px */ left: 50%; transform: translateX(-50%); /* 居中显示 */ z-index: 3000; } /* 鼠标悬停时搜索框展开 */ #search-input:hover, #search-input:focus { width: 600px; padding: 5px 20px; box-shadow: 0 0 5px rgba(0, 0, 0, 0.2); /* 添加阴影效果 */ } #logo_head { font-family: 'Pacifico', cursive; /* 使用本地字体 Pacifico */ margin: 0; padding-left: 10px; text-align: left; font-size: 32px; color: rgb(100, 99, 99); }