.sidebar {
    position: fixed;
    left: 5px;
    top: 40%;
    transform: translateY(-50%);
    background-color: #fff;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 10px 0;
    border-radius: 0 8px 8px 0;
    transition: all 0.3s ease;
}

.sidebar ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.sidebar li {
    margin: 5px 0;
}

.sidebar a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
    padding: 7px 10px 7px 15px;
    border-radius: 0 5px 5px 0;
    transition: background-color 0.3s;
    display: block;
    white-space: nowrap;
    font-size: 16px;
}

.sidebar a:hover {
    background-color: #f0f0f0;
}

.sidebar a.active {
    background-color: #1a5c9a;
    color: white;
}

.content {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
}

/* 表单和数据组通用样式 */
.data-group {
    margin-bottom: 30px;
    padding: 10px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    background-color: #fff;
}

.form-group {
    margin-bottom: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
}

.nav-buttons-container {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.nav-button-wrapper {
    flex: 1;
    min-width: 200px;
}

/* 默认隐藏移动端顶部栏 */
.mobile-top-nav {
    display: none;
}

/* ================= 移动端适配 (Max 768px) ================= */
@media (max-width: 768px) {

    /* 1. 顶部返回栏 */
    .mobile-top-nav {
        display: flex;
        align-items: center;
        justify-content: center;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 50px;
        background-color: #fff;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        z-index: 1001;
        /* 比底部导航和内容高 */
    }

    .mobile-top-nav .back-btn {
        position: absolute;
        left: 0;
        top: 0;
        height: 50px;
        line-height: 50px;
        padding: 0 15px;
        font-size: 18px;
        color: #333;
        text-decoration: none;
    }

    .mobile-top-nav .nav-title {
        font-size: 17px;
        font-weight: 600;
        color: #2c3e50;
    }

    /* 2. 底部标签栏 (重置PC侧边栏样式) */
    .sidebar {
        display: block !important;
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 60px;
        transform: none !important;
        border-radius: 0;
        padding: 0;
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
        z-index: 1000;
    }

    .sidebar ul {
        flex-direction: row;
        justify-content: space-around;
        align-items: center;
        height: 100%;
    }

    .sidebar li {
        margin: 0;
        flex: 1;
        text-align: center;
    }

    .sidebar a {
        padding: 0;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        height: 100%;
        border-radius: 0;
        background-color: transparent !important;
        color: #999;
    }

    .sidebar a.active {
        color: #1a5c9a;
    }

    /* 隐藏原本的文字换行符 */
    .sidebar a br {
        display: none;
    }

    /* 添加图标 */
    .sidebar a[href*="user_index"]::before {
        content: "🏠";
        font-size: 22px;
        margin-bottom: 2px;
        display: block;
    }

    .sidebar a[href*="basic_health_data"]::before {
        content: "❤️";
        font-size: 22px;
        margin-bottom: 2px;
        display: block;
    }

    .sidebar a[href*="health_assessment"]::before {
        content: "📝";
        font-size: 22px;
        margin-bottom: 2px;
        display: block;
    }

    .sidebar a[href*="health_report"]::before {
        content: "📊";
        font-size: 22px;
        margin-bottom: 2px;
        display: block;
    }

    .sidebar a[href*="myself"]::before {
        content: "👤";
        font-size: 22px;
        margin-bottom: 2px;
        display: block;
    }

    /* 3. 内容区域调整 */
    .container.content {
        margin-top: 60px !important;
        /* 留出顶部空间 */
        margin-bottom: 80px !important;
        /* 留出底部空间 */
        padding: 15px;
        width: auto;
    }

    /* 4. 其他微调 */
    .form-grid {
        grid-template-columns: 1fr;
    }

    /* 表单单列 */
    h1 {
        font-size: 1.5rem;
        margin-top: 0;
    }

    /* 调整标题大小 */
    /* 隐藏PC端的大标题，因为顶部栏已经有了 */
    body>.container>h1 {
        display: none;
    }
}