/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    background-color: #f0f2f5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 容器样式 */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    flex: 1;
}

/* 其他原有样式保持不变，仅修改/新增头部居中相关样式 */

/* 头部容器：确保整体在页面中水平+垂直居中，与上下内容保持合理间距 */
.header-wrapper {
    display: flex;
    justify-content: center; /* 水平居中 */
    align-items: center;      /* 垂直居中（内部元素对齐） */
    width: 100%;
    padding: 20px 0;          /* 上下内边距，避免紧贴顶部 */
    margin-bottom: 25px;      /* 与下方布局切换按钮间距 */
}

/* Logo与标题的容器：控制内部元素间距，确保整体紧凑居中 */
.header-container {
    display: flex;
    align-items: center;      /* Logo和标题垂直居中对齐 */
    gap: 12px;                /* Logo与标题的固定间距，避免拥挤 */
    padding: 10px 20px;       /* 内边距，提升点击区域和视觉感 */
    border-radius: 12px;      /* 轻微圆角，增加设计感 */
    background-color: rgba(255, 255, 255, 0.8); /* 半透明背景，突出主体 */
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05); /* 轻微阴影，增强层次感 */
}

/* Logo样式：固定尺寸，确保不拉伸变形 */
.site-logo {
    width: 56px;
    height: 56px;
    object-fit: contain;      /* 保持Logo比例，避免变形 */
}

/* 标题样式：统一字体和颜色，确保视觉突出 */
.site-title h1 {
    font-size: 38px;
    font-weight: 700;
    color: #333;
    letter-spacing: 1.5px;    /* 字间距适中，提升辨识度 */
    margin: 0;                /* 清除默认margin，避免错位 */
    background: linear-gradient(90deg, #4d90fe, #357ae8); /* 蓝色渐变，呼应搜索按钮 */
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;       /* 渐变文字效果 */
}






/* 布局切换控制区 */
.layout-controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.layout-btn {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 8px 15px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
}

.layout-btn.active {
    background-color: #4d90fe;
    color: white;
    border-color: #4d90fe;
}

.layout-btn:hover:not(.active) {
    border-color: #4d90fe;
    color: #4d90fe;
}

/* 搜索框样式 */
.search-box {
    background-color: #ffffff;
    padding: 30px 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin: 0 auto 30px;
    text-align: center;
    width: 100%;
    max-width: 1200px;
}

.search-container {
    display: flex;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}

.search-form {
    flex: 1;
    display: flex;
    width: 100%;
}

.search-form input {
    flex: 1;
    padding: 14px 20px;
    font-size: 16px;
    border: 2px solid #dddddd;
    border-right: none;
    border-radius: 8px 0 0 8px;
    outline: none;
}

.search-form input:focus {
    border-color: #4d90fe;
    box-shadow: 0 0 0 2px rgba(77, 144, 254, 0.2);
}

.search-form button {
    padding: 14px 28px;
    background-color: #4d90fe;
    color: white;
    border: none;
    border-radius: 0 8px 8px 0;
    cursor: pointer;
    font-size: 16px;
}

.search-form button:hover {
    background-color: #357ae8;
}

/* 核心：三种布局样式（修复类名冲突） */
.nav-container {
    width: 100%;
    margin-bottom: 40px;
    transition: all 0.3s ease;
}

/* 1. 网格布局（默认） */
.layout-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

/* 2. 列表布局 */
.layout-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.layout-list .category-card {
    padding: 15px;
}

.layout-list .websites {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 10px 0;
    gap: 10px;
}

.layout-list .website-item {
    flex: 0 0 auto;
}

.layout-list .website-item a {
    white-space: nowrap;
    padding: 10px 15px;
}

/* 3. 紧凑布局 */
.layout-compact {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
}

.layout-compact .category-card {
    padding: 12px;
}

.layout-compact .category-title {
    font-size: 16px;
    margin-bottom: 8px;
    padding-bottom: 5px;
}

.layout-compact .website-item a {
    padding: 8px 10px;
    font-size: 14px;
}

/* 分类卡片样式 */
.category-card {
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    transition: transform 0.3s ease;
}

.category-card:hover {
    transform: translateY(-3px);
}

.category-title {
    color: #333;
    border-bottom: 2px solid #4d90fe;
    padding-bottom: 10px;
    margin-bottom: 15px;
    font-size: 18px;
    display: flex;
    align-items: center;
}

.category-title::before {
    content: "📁";
    margin-right: 8px;
}

.websites {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.website-item {
    flex: 0 0 calc(50% - 5px);
}

.website-item a {
    display: block;
    padding: 12px 15px;
    background-color: #f8f9fa;
    border-radius: 6px;
    color: #333;
    text-decoration: none;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.website-item a:hover {
    background-color: #e9f0ff;
    color: #4d90fe;
}

/* 管理链接 */
.admin-link {
    display: block;
    text-align: center;
    margin-top: 20px;
    color: #4d90fe;
    text-decoration: none;
    padding: 10px;
}

.admin-link:hover {
    text-decoration: underline;
}

/* 版权信息 */
.copyright {
    text-align: center;
    color: #666;
    font-size: 14px;
    padding: 20px 0;
    border-top: 1px solid #ddd;
    margin-top: auto;
}

/* 响应式适配 */
@media (max-width: 1199px) {
    .layout-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}
/* 响应式适配：不同屏幕尺寸下调整大小，保持居中比例 */
@media (max-width: 767px) {
    .header-container {
        gap: 10px;
        padding: 8px 15px;
    }
    .site-logo {
        width: 48px;
        height: 48px;
    }
    .site-title h1 {
        font-size: 30px;
        letter-spacing: 1px;
    }
}

@media (max-width: 575px) {
    .header-container {
        gap: 8px;
        padding: 6px 12px;
    }
    .site-logo {
        width: 40px;
        height: 40px;
    }
    .site-title h1 {
        font-size: 24px;
        letter-spacing: 0.5px;
    }
    .header-wrapper {
        padding: 15px 0;
        margin-bottom: 20px;
    }
}