/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", "微软雅黑", Arial, sans-serif;
}

body {
    color: #333;
    font-size: 14px;
    line-height: 1.7;
    background-color: #f9f9f9;
}

a {
    text-decoration: none;
    color: #333;
}

ul {
    list-style: none;
}

/* 顶部导航 */
.top-header {
    height: 60px;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 999;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0 20px;
}

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

.logo img {
    width: 40px;
    height: 40px;
    margin-right: 10px;
}

.logo span {
    font-size: 16px;
    font-weight: bold;
    color: #000; /* 左上角黑色文字保留 */
}

.top-nav a {
    margin: 0 15px;
    font-size: 14px;
    color: #666;
    transition: color 0.2s;
}

.top-nav a:hover {
    color: #0F4C81; /* 导航hover匹配高级海军蓝 */
}

/* 核心布局 */
.main-container {
    display: flex;
    max-width: 1200px;
    margin: 80px auto 20px;
    background-color: #fff;
    border: 1px solid #eee;
}

/* 左侧导航栏（高级海军蓝风格） */
.left-nav {
    width: 260px;
    background-color: #f5f8fc; /* 浅蓝底搭配深海军蓝，更协调 */
    border-right: 1px solid #e8edf2;
    padding: 20px 0;
}

.nav-title {
    padding: 0 20px 15px;
    border-bottom: 1px solid #e8edf2;
    margin-bottom: 15px;
}

.nav-title h3 {
    font-size: 16px;
    color: #0F4C81; /* 左侧导航标题改为高级海军蓝 */
    margin-bottom: 5px;
}

.nav-title span {
    font-size: 12px;
    color: #999;
}

.nav-list li {
    line-height: 40px;
    padding: 0 20px;
}

.nav-list li a {
    display: block;
    font-size: 14px;
    color: #333;
    transition: all 0.2s;
}

.nav-list li.active {
    background-color: #0F4C81; /* 左侧选中项背景为高级海军蓝 */
}

.nav-list li.active a {
    color: #fff; /* 选中项文字白色，保证可读性 */
    font-weight: bold;
}

.nav-list li:hover:not(.active) {
    background-color: #e8edf2; /*  hover浅灰，搭配高级蓝 */
}

/* 右侧内容区 */
.right-content {
    flex: 1;
    padding: 30px 40px;
}

.content-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.content-header h1 {
    font-size: 28px;
    color: #333;
    margin-bottom: 10px;
}

.update-time {
    font-size: 12px;
    color: #999;
}

/* 内容模块（核心：高级海军蓝配色） */
.content-section {
    margin-bottom: 30px;
}

.section-title {
    font-size: 18px;
    color: #0F4C81; /* 标题文字改为高级海军蓝 */
    font-weight: bold;
    padding-bottom: 10px;
    border-bottom: 2px solid #0F4C81; /* 下划线匹配高级海军蓝 */
    margin-bottom: 20px;
}

.content-body p {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 15px;
    color: #666;
}

/* 架构图 */
.arch-img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto 20px;
    border: 1px solid #eee;
}

/* 列表样式 */
.feature-list, .value-list {
    padding-left: 20px;
}

.feature-list li, .value-list li {
    list-style: disc;
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 8px;
}

/* 页脚 */
.footer {
    max-width: 1200px;
    margin: 0 auto 30px;
    text-align: center;
    padding: 15px 0;
    border-top: 1px solid #eee;
}

.footer-container p {
    font-size: 12px;
    color: #999;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }
    .left-nav {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid #e8edf2;
    }
    .right-content {
        padding: 20px;
    }
    .top-nav {
        display: none;
    }
}
.img-desc {
    text-align: center;
    margin: 5px auto 20px;
    font-size: 14px;
    color: #666;
}