/* 主体样式调整 */
body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0;
    padding: 14px; /* 保持紧凑布局 */
    width: 100%;
    min-height: 100vh;
    box-sizing: border-box;
    background-color: #f4f4f4;
    color: #343a40;
    transition: background-color 0.2s ease, color 0.2s ease;
}

body.dark-mode {
    background-color: #242526;
    color: #e4e6eb;
}

.header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 12px; /* 增加标题上方的留白 */
    margin-bottom: 20px;
    width: 100%;
    max-width: 1400px;
    padding: 0 14px;
    box-sizing: border-box;
    position: relative;
}

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

.logo {
    width: 36px;
    height: 36px;
    margin-right: 10px;
    border-radius: 4px;
    transition: transform 0.2s ease;
}

.logo:hover {
    transform: scale(1.1);
}

h1 {
    font-size: 30px;
    font-weight: bold;
    margin: 0;
}

/* 小屏幕特定调整 */
@media (max-width: 300px) {
    .logo {
        width: 32px;
        height: 32px;
    }

    h1 {
        font-size: 26px;
    }
}

/* 搜索栏 */
.search-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    gap: 0; /* 取消子元素间隙 */
    width: 100%;
    max-width: 290px; /* 总宽度减少 50px */
    border: 1px solid #dfe1e5; /* 外边框 */
    border-radius: 50px; /* 圆角胶囊样式 */
    overflow: hidden; /* 防止子元素溢出 */
    background-color: rgba(255, 255, 255, 0.1); /* 调整浅色模式背景透明度 */
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1); /* 添加轻微阴影效果 */
    position: relative; /* 为居中优化定位 */
}

.group-select {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px; /* 缩小下拉框宽度 */
    border: none; /* 移除边框 */
    outline: none; /* 移除高亮 */
    height: 34px;
    /* padding: 0 10px; *//* 全部文字对齐 */
    font-size: 13px;
    cursor: pointer;
    background-color: transparent;
    color: inherit;
    appearance: none; /* 移除默认样式 */
    position: relative;
    text-align: center;
    line-height: 34px; /* 修正“全部”文字垂直居中 */
    padding-left: 5px; /* 微调左侧文字间距，减少空余 */
}

.group-select::after {
    content: "▼"; /* 自定义下箭头 */
    position: absolute;
    right: 10px; /* 贴近文字 */
    font-size: 10px;
    color: inherit;
    pointer-events: none;
}

.group-select option {
    font-size: 14px; /* 下拉选项字体稍微增大 */
    color: #343a40; /* 浅色模式下文字颜色修复 */
}

body.dark-mode .group-select option {
    color: #e4e6eb; /* 深色模式下文字颜色修复 */
    background-color: #3a3b3c; /* 深色模式下背景色一致 */
}

.search-input {
    flex: 1; /* 调整输入框宽度 */
    width: calc(100% - 70px); /* 减去下拉框宽度，保持整体搜索栏居中 */
    max-width: 220px; /* 输入框宽度缩短至 220px */
    border: none;
    outline: none;
    height: 34px;
    padding: 0 10px;
    font-size: 13px;
    background-color: transparent;
    color: inherit;
}

.search-input::placeholder {
    color: rgba(51, 51, 51, 0.6); /* 优化浅色模式占位符颜色 */
}

body.dark-mode .search-input::placeholder {
    color: rgba(228, 230, 235, 0.6); /* 深色模式占位符颜色调整 */
}

body.dark-mode .search-container {
    background-color: rgba(58, 59, 60, 0.9); /* 深色模式背景 */
    border-color: #5f6368;
}

body.dark-mode .group-select,
body.dark-mode .search-input {
    color: #e4e6eb; /* 深色模式字体颜色修复 */
}

body.dark-mode .group-select::after {
    color: #e4e6eb; /* 修复深色模式下箭头颜色 */
}

/* 图标区域 */
#gallery {
    width: 100%;
    max-width: 1400px;
    padding: 0 14px;
    box-sizing: border-box;
}

.icon-group {
    margin-bottom: 30px;
}

.group-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 15px;
    padding-left: 10px;
    border-left: 6px solid #00aeff;
}

.icons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

/* 小屏幕设备 */
@media (max-width: 300px) {
    .icons {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 540px~720px设备（5列图标） */
@media (min-width: 540px) and (max-width: 720px) {
    .icons {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* 平板设备（6~8列图标） */
@media (min-width: 721px) and (max-width: 1024px) {
    .icons {
        grid-template-columns: repeat(6, 1fr);
    }
}

@media (min-width: 1025px) and (max-width: 1200px) {
    .icons {
        grid-template-columns: repeat(8, 1fr);
    }
}

/* 大屏设备（PC端显示12列图标） */
@media (min-width: 1200px) {
    .icons {
        grid-template-columns: repeat(12, 1fr);
    }
}

.icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px;
    border-radius: 8px;
    transition: all 0.2s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.icon img {
    width: 60px;
    height: 60px;
    border-radius: 4px;
    margin-bottom: 6px;
    transition: transform 0.2s ease;
}

.icon:hover {
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2); /* 添加悬停阴影效果 */
    transform: scale(1.1); /* 放大动画保留 */
    background-color: #f1f3f5; /* 添加轻微背景色变化 */
    transition: all 0.3s ease; /* 平滑过渡 */
}

body.dark-mode .icon:hover {
    background-color: #3a3b3c; /* 深色模式下的背景颜色变化 */
}

.icon-name {
    font-size: 11px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: inherit;
}

/* 工具提示 */
.tooltip {
    position: absolute;
    left: 50%;
    top: 40%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 5px 15px;
    border-radius: 4px;
    font-size: 12px;
    text-align: center;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.icon:hover .tooltip {
    opacity: 1;
}

/* 按钮样式 */
.theme-toggle-button,
.back-to-top-button {
    position: fixed;
    z-index: 9999;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background-color: #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 24px;
    line-height: 1;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.theme-toggle-button {
    bottom: 60px;
    right: 20px;
}

.back-to-top-button {
    bottom: 120px;
    right: 20px;
    display: none;
}

.footer {
    margin-top: auto;
    padding: 20px 0;
    width: 100%;
    max-width: 1400px;
    text-align: center;
    font-size: 12px;
    color: rgba(173, 181, 189, 0.7); /* 淡化版权信息颜色 */
    border-top: 1px solid #e9ecef;
}

.footer a {
    color: rgba(173, 181, 189, 0.7); /* 超链接颜色与文字一致 */
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

body.dark-mode .footer {
    border-color: #3a3b3c;
    color: rgba(108, 117, 125, 0.7); /* 深色模式下淡化版权文字 */
}

body.dark-mode .footer a {
    color: rgba(108, 117, 125, 0.7); /* 深色模式下的超链接颜色 */
}