* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 标题样式 */
h1,
h2,
h3,
h4 {
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    border-bottom: 2px solid #eaecef;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    color: #0066cc;
}

h4 {
    font-size: 1.25rem;
    color: #444;
    margin-top: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

/* 头部样式 */
header {
    background: linear-gradient(135deg, #4b6cb7 0%, #182848 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

header h1 {
    margin-bottom: 0.5rem;
}

/* 导航栏样式 */
nav {
    background-color: #333;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

nav ul {
    display: flex;
    justify-content: center;
    list-style-type: none;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 1rem 0;
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #4b6cb7;
}

/* 主要内容部分 */
.section {
    padding: 4rem 0;
}

.alternate-bg {
    background-color: #f0f5ff;
}

/* 卡片样式 */
.card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    margin-bottom: 2rem;
    transition:
        transform 0.3s,
        box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

/* 网格布局 */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
}

/* 图片容器 */
.img-container {
    margin: 1rem 0;
    text-align: center;
}

.full-width-img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

.caption {
    font-size: 0.9rem;
    color: #666;
    text-align: center;
    margin-top: 0.5rem;
}

/* Fashion MNIST 示例图片 */
.fashion-mnist-examples {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.class-item {
    text-align: center;
}

.class-item .img-container {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    background-color: #f5f5f5;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.class-item .img-container img {
    max-width: 100%;
    max-height: 100%;
}

.class-item p {
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

/* 指标卡片 */
.metrics {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 1.5rem 0;
}

.metric-item {
    flex: 1;
    min-width: 110px;
    text-align: center;
    background-color: #f8f9fa;
    padding: 1.5rem 1rem;
    border-radius: 8px;
    margin: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.metric-value {
    font-size: 2rem;
    font-weight: bold;
    color: #4b6cb7;
    margin-bottom: 0.5rem;
}

.metric-name {
    font-size: 0.9rem;
    color: #666;
}

/* 参数表格 */
.parameters-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.parameters-table th,
.parameters-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

.parameters-table th {
    background-color: #f5f5f5;
    font-weight: 600;
}

.parameters-table tr:hover {
    background-color: #f8f9fa;
}

/* 分析列表 */
.analysis ul,
.findings ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.analysis li,
.findings li {
    margin-bottom: 0.5rem;
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: white;
    padding: 2rem 0;
    text-align: center;
}

footer a {
    color: #99ccff;
    text-decoration: none;
}

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

/* 媒体查询 - 适应小屏幕 */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
    }

    nav ul li {
        margin: 0;
    }

    .grid-container {
        grid-template-columns: 1fr;
    }

    .metrics {
        flex-direction: column;
    }

    .metric-item {
        margin: 0.5rem 0;
    }
}

/* 架构图样式 */
.architecture-diagram {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

/* 移动端导航栏优化 */
@media (max-width: 768px) {
    /* 默认隐藏导航菜单 */
    nav ul {
        display: none;
        flex-direction: column;
        width: 100%;
        padding: 0.5rem 0;
    }

    nav ul.show {
        display: flex;
    }

    nav ul li {
        width: 100%;
        text-align: center;
    }

    nav ul li a {
        padding: 0.75rem 0;
        width: 100%;
        display: block;
    }

    /* 添加汉堡菜单图标 */
    .menu-toggle {
        display: block;
        color: white;
        font-size: 1.5rem;
        cursor: pointer;
        padding: 1rem 0;
        text-align: right;
    }

    /* 调整导航栏布局 */
    nav .container {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    /* 添加网站标题到导航栏 */
    .nav-title {
        color: white;
        font-weight: 600;
        font-size: 1.2rem;
        display: block;
    }

    /* 当菜单打开时的遮罩层 */
    .overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.7);
        z-index: 999;
        display: none;
    }

    .overlay.show {
        display: block;
    }
}

/* 桌面端隐藏菜单按钮和导航标题 */
.menu-toggle,
.nav-title {
    display: none;
}