@media screen and (max-width: 1280px){
    :root { 
    /* 字体大小变量 (Font Size) */
    --ft14: 12px; 
    --ft16: 12px; 
    --ft18: 16px; 
    --ft20: 18px; 
    --ft24: 18px; 
    --ft28: 28px; 
    --ft29: 29px; 
    --ft30: 30px; 
    --ft32: 32px; 
    --ft36: 36px; 
    --ft40: 40px; 
    --ft48: 48px; 
    --ft56: 56px; 
    --ft60: 60px; 
    --ft68: 68px; 
    --ft70: 70px; 
    --ft100: 100px; 

    /* 内边距/间距变量 (Padding/Spacing) */
    --p10: 10px; 
    --p16: 16px; 
    --p20: 20px; 
    --p24: 24px; 
    --p32: 32px; 
    --p40: 40px; 
    --p50: 50px; 
    --p60: 60px; 
    --p64: 64px; 
    --p70: 70px; 
    --p80: 80px; 
    --p100: 100px; 
}
    .logo{
        height: 60px;
    }
}
@media screen and (max-width: 1024px) {
    .mo_nav {
        display: block;
    }

    /* 隐藏原本的 PC 端导航和按钮组 */
    .header .nav, 
    .header .btn {
        display: none; 
    }

    /* 移动端菜单容器样式 */
    .header .nav {
        display: flex; /* 使用 flex 以便控制 */
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        height: 100vh;
        background-color: #fff;
        flex-direction: column;
        padding-top: 100px; /* 避开固定的 header 高度 */
        box-sizing: border-box;
        overflow-y: auto;
        z-index: 90;
        transform: translateX(100%); /* 默认隐藏在右侧 */
        transition: transform 0.3s ease-in-out;
        align-items: flex-start; /* 左对齐 */
    }

    /* 菜单激活显示 */
    .header .nav.active {
        transform: translateX(0);
        display: flex;
    }

    /* 移动端列表样式 */
    .nav > ul {
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        padding: 0 20px;
        height: auto;
    }

    .nav > ul > li {
        width: 100%;
        height: auto;
        border-bottom: 1px solid #eee;
        flex-direction: column;
        align-items: flex-start;
        padding: 15px 0;
    }

    .nav > ul > li > a {
        font-size: 18px;
        font-weight: bold;
        color: var(--text-color);
        text-decoration: none;
        width: 100%;
        display: flex;
        justify-content: space-between;
    }

    /* 移动端二级菜单 (默认隐藏) */
    .nav > ul > li .erji {
        position: static; /* 取消绝对定位，占据文档流 */
        width: 100%;
        height: auto;
        opacity: 1;
        transform: none;
        background-color: #f9f9f9;
        display: none; /* JS 控制显示 */
        padding: 10px 0;
        margin-top: 10px;
        box-shadow: none;
    }

    .nav > ul > li .erji > .max {
        display: flex;
        flex-direction: column;
        padding: 0 15px;
    }
    
    /* 移动端二级菜单左侧列表 */
    .erji > .max .left {
        width: 100%;
        padding: 0;
    }
    
    .erji > .max .left dl {
        display: flex;
        flex-direction: column;
        gap: 10px;
        margin-top: 10px;
    }

    .erji > .max .left dl dd {
        padding: 10px;
        background: #fff;
        border-radius: 4px;
    }
    
    /* 移动端隐藏右侧复杂的 Tab 内容，只显示列表或简化显示 */
    .erji_con {
        display: none; /* 手机端通常不需要那么复杂的右侧图文 */
    }
    
    /* 如果必须显示，改为堆叠布局 */
    .erji_tab {
        display: flex !important; /* 强制显示 active 的 tab */
        flex-direction: column;
        padding: 20px 0;
        border-top: 1px solid #ddd;
    }
    
    .erji_tab .tab_right {
        width: 100%;
        margin-top: 20px;
    }
    
    .tab_btn {
        flex-direction: column;
        gap: 10px;
    }
    
    .tab_btn a {
        width: 100%;
        justify-content: center;
    }
}
@media screen and (max-width: 768px) {
        :root { 
        /* 字体大小变量 (Font Size) */
        --ft14: 12px; 
        --ft16: 10px; 
        --ft18: 16px; 
        --ft20: 16px; 
        --ft24: 18px; 
        --ft28: 20px; 
        --ft29: 29px; 
        --ft30: 30px; 
        --ft32: 32px; 
        --ft36: 30px; 
        --ft40: 34px; 
        --ft48: 30px; 
        --ft56: 56px; 
        --ft60: 30px; 
        --ft68: 68px; 
        --ft70: 70px; 
        --ft100: 100px; 
    
        /* 内边距/间距变量 (Padding/Spacing) */
        --p10: 10px; 
        --p16: 16px; 
        --p20: 20px; 
        --p24: 24px; 
        --p32: 32px; 
        --p40: 40px; 
        --p50: 50px; 
        --p60: 60px; 
        --p64: 64px; 
        --p70: 70px; 
        --p80: 80px; 
        --p100: 100px; 
    }
    .capability_list,.index_capabilities_list,.why_list,.mokuai1_list,.mokuai2_list,.index_industries_list, .industries_list,.jiang_list,.team_list,.part_list,.show4_list {
        grid-template-columns: repeat(2, 1fr);
    }
    .contact .max,.structure_list,.about .max,.wenda_max,.show1,.show2 .show2_logos,.capa3 .max {
        grid-template-columns: repeat(1, 1fr);
    }
    .why_discuss .left {
        padding: 20px;
        border-bottom-left-radius: 0px;
        border-top-left-radius: 15px;
        border-top-right-radius: 15px;
    }
    .why_discuss {
        margin-top: 24px;
        padding: 48px;
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .why_discuss .right {
        width: 100%;
        background-color: rgba(255, 255, 255, 0.3);
        backdrop-filter: blur(4px);
        border-bottom-left-radius: 15px;
        border-bottom-right-radius: 15px;
        border-top-right-radius: 0px;
    }
    .mokuai3_box {
        grid-template-columns: repeat(1, 1fr);
    }
    .zhengshu_list {
        grid-template-columns: repeat(4, 1fr);
    }
    .show1_texing p:nth-child(odd)::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0px;
        width: 30px;
        height: 30px;
    }
    .show1-right-img {
        width: 100%;
    }
    .footer .max {
        display: flex;
        flex-direction: column;
        gap: 100px;
    }
    .footer .max .left {
        margin: 0 auto;
        align-items: center;
    }
    .footer_tuiguang {
        justify-content: center;
    }
    .footer .max .right {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        justify-content: center;
        text-align: center;
        align-items: center;
    }
    .footer_nav {
        padding-top: var(--p24);
        display: flex;
        flex-direction: column;
    }
    .about_sub{
        width: 100%;
    }
    .about_sub *{
        text-wrap-mode: unset!important;
    }
    .structure_sub {
        width: 100%;
    }
    .structure_sub *{
        text-wrap-mode: unset!important;
    }
}
@media screen and (max-width: 480px) {
        :root { 
        /* 字体大小变量 (Font Size) */
        --ft14: 12px; 
        --ft16: 10px; 
        --ft18: 12px; 
        --ft20: 16px; 
        --ft24: 12px; 
        --ft28: 16px; 
        --ft29: 29px; 
        --ft30: 30px; 
        --ft32: 14px; 
        --ft36: 30px; 
        --ft40: 34px; 
        --ft48: 20px; 
        --ft56: 30px; 
        --ft60: 20px; 
        --ft68: 68px; 
        --ft70: 70px; 
        --ft100: 100px; 
    
        /* 内边距/间距变量 (Padding/Spacing) */
        --p10: 10px; 
        --p16: 16px; 
        --p20: 20px; 
        --p24: 10px; 
        --p32: 10px; 
        --p40: 40px; 
        --p50: 50px; 
        --p60: 60px; 
        --p64: 64px; 
        --p70: 70px; 
        --p80: 80px; 
        --p100: 100px; 
    }
    .capability_list,.index_capabilities_list,.why_list,.mokuai1_list,.mokuai2_list,.index_industries_list, .industries_list,.jiang_list,.team_list,.part_list,.show4_list,.indu_show3_logos,.wenda_list {
        grid-template-columns: repeat(1, 1fr);
    }
    .indu_show1_biaoqian {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
    .why_discuss .left {
        padding: 10px;
    }
    .parts_list::after {
        content: "";
        position: relative;
        width: 0%;
        height: 0px;
        top: 35px;
        left: 50%;
        transform: translateX(-50%);
        background-color: rgba(13, 73, 142, 0.3);
    }
    .parts_list {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        align-items: flex-start;
        justify-content: space-between;
        position: relative;
        margin-top: var(--p40);
    }
    .left p span {
        text-wrap-mode: wrap;
    }
    .banner_btn a {
        padding: 10px 14px;
    }
    .banner_box img {
        width: 100%;
        aspect-ratio: 16 / 9;
    }
    .title {
        width: 90%;
        text-align: center;
        color: rgba(17, 24, 39, 1);
        font-size: var(--ft36);
        line-height: var(--ft40);
        font-weight: bold;
        position: relative;
    }
    .mokuai3_btn a {
        font-size: var(--ft20);
    }
    .mokuai3_btn {
        display: flex;
        flex-direction: column;
    }
}