/* =====================================================
 * 武汉云特科技有限公司 - 首页样式 (重构版)
 * 合并自: j_reset.css + j_web.css(首页部分) + aos.css
 *        + j_mobile.css + banner-fade.css + transitions.css
 * 优化:
 *   1. 合并 6 个 CSS 文件
 *   2. 删除 IE hack(filter:alpha / mayfish: expression 等)
 *   3. 删除 -ms-/-moz- 等冗余前缀
 *   4. 删除未使用的内页样式
 *   5. 使用 CSS 变量管理主题色
 *   6. 使用 flexbox 替代 float 布局
 * ===================================================== */

/* ==========  CSS 变量  ========== */
:root {
    --primary: #0483b0;       /* 主色 */
    --primary-dark: #0066cc;
    --dark: #283c55;          /* 导航背景 */
    --dark-deep: #333337;     /* 状态条/底栏 */
    --gray: #3d3c42;          /* 页脚背景 */
    --text: #323131;
    --text-light: #70726f;
    --text-muted: #989898;
    --border: #e9e9e9;
    --bg-light: #fafafa;
    --max-width: 1200px;
    --header-h: 100px;
    --banner-h: 500px;
    --transition: 0.3s ease;
    --transition-slow: 0.6s ease-in-out;
}

/* ==========  Reset (精简)  ========== */
* {
    font-family: Arial, Helvetica, "Microsoft Yahei", sans-serif;
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

html {
    font-size: 62.5%;
    overflow-x: hidden;
}

body {
    font-size: 1.6rem;     /* = 16px */
    color: var(--text);
    background: #fff;
    min-height: 100vh;
    overflow-x: hidden;
}

ul, li { list-style: none; }
a { text-decoration: none; color: inherit; outline: none; }
img { display: block; max-width: 100%; }
h1, h2, h3, h4, h5, h6, strong { font-weight: normal; }
::selection { background: #0aa284; color: #fff; }

input { outline: none; padding: 0 5px; vertical-align: middle; }

/* 通用容器 */
.main_box {
    margin: 0 auto;
    max-width: var(--max-width);
    width: 100%;
    padding: 0 15px;
}

/* ==========  顶部状态条  ========== */
#status {
    background: var(--dark-deep);
    height: 10px;
}

/* ==========  Header  ========== */
#header {
    position: relative;
    height: var(--header-h);
    background: url(/skin/images/head_bg.jpg) center no-repeat;
    background-size: cover;
}

#header .main_box {
    position: relative;
    z-index: 555;
    height: 100%;
}

#logo_area {
    display: flex;
    align-items: center;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 3;
}

#logo_area a img {
    display: block;
    padding-top: 3px;
}

/* ==========  导航  ========== */
#nav {
    position: absolute;
    right: 0;
    top: 0;
    background: var(--dark);
    height: var(--header-h);
}

#nav ul { display: flex; }

#nav li {
    margin: 0 -2px;
    position: relative;
    padding: 0 26px;
}

#nav li .a {
    display: block;
    position: relative;
    text-align: center;
    z-index: 4;
}

#nav li .a strong {
    font-size: 15px;
    color: #f7f7f7;
    line-height: var(--header-h);
    display: block;
    position: relative;
    z-index: 4;
}

#nav li .a span {
    position: absolute;
    inset: 0;
}

#nav li .a i {
    position: absolute;
    bottom: 0;
    left: 0;
    display: block;
    background: var(--primary);
    width: 100%;
    height: 0;
    z-index: 1;
    transition: height var(--transition-slow);
}

#nav li.on i,
#nav li:hover i {height: var(--header-h);width: 180%;          /* 左右加宽，可按需调大 */
  left: 50%;            /* 水平居中 */
  transform: translateX(-50%);}

#nav li.on .a strong,
#nav li:hover .a strong { color: #fff; }

/* 二级下拉 */
#nav .list {
    display: none;
    position: absolute;
    left: 5px;
    top: var(--header-h);
    width: 900px;
    background: rgba(255, 255, 255, 0.95);
    z-index: 9;
}

#nav li.title:hover .list { display: block; }

#nav .list .box {
    display: flex;
    flex-wrap: wrap;
}

#nav .list a {
    margin-left: 13px;
    color: #656565;
    line-height: 50px;
    font-size: 14px;
    transition: color var(--transition);
}

#nav .list a:hover { color: var(--primary); }

.list_box {
    position: absolute;
    left: 0;
    top: var(--header-h);
    z-index: 8;
    height: 0;
    line-height: 50px;
    width: 100%;
    background: rgba(255, 255, 255, 0.8);
    transition: height var(--transition-slow);
}

.list_box.active { height: 50px; }

/* ==========  Banner 淡入淡出  ========== */
#banner {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: var(--banner-h);
}

#banner .bd { position: relative; width: 100%; height: 100%; z-index: 0; }
#banner .bd ul { width: 100%; height: 100%; }
#banner .bd li {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
    z-index: 1;
}
#banner .bd li.active { opacity: 1; z-index: 2; }
#banner .bd li a {
    display: block;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center top;
    background-repeat: no-repeat;
}

/* 4 张轮播背景图(原内联 style 提取) */
#banner .bd li:nth-child(1) a { background-image: url(/skin/banner/b01.jpg); }
#banner .bd li:nth-child(2) a { background-image: url(/skin/banner/b02.jpg); }
#banner .bd li:nth-child(3) a { background-image: url(/skin/banner/b03.jpg); }
#banner .bd li:nth-child(4) a { background-image: url(/skin/banner/b04.jpg); }

#banner .hd {
    position: absolute;
    bottom: 20px;
    width: 100%;
    text-align: center;
    z-index: 3;
}
#banner .hd ul { display: inline-flex; }
#banner .hd li {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    margin: 0 5px;
    cursor: pointer;
    transition: all var(--transition);
}
#banner .hd li.on { background: #fff; width: 15px; height: 15px; }

#banner .prev,
#banner .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 60px;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    text-align: center;
    line-height: 60px;
    font-size: 20px;
    cursor: pointer;
    z-index: 3;
    transition: background var(--transition);
    display: none;
}
#banner:hover .prev,
#banner:hover .next { display: block; }
#banner .prev:hover,
#banner .next:hover { background: rgba(0, 0, 0, 0.6); }
#banner .prev { left: 20px; }
#banner .next { right: 20px; }

/* ==========  通知公告  ========== */
.s_fast_link {
    position: relative;
    background: var(--bg-light);
    overflow: hidden;
    z-index: 3;
    padding: 20px 0;
    height: 72px;
    line-height: 32px;
}

.s_fast_link dl {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 0;
}

.s_fast_link dt {
    flex-shrink: 0;
    font-size: 14px;
    background: url(/skin/images/title_notice.png) 0 center no-repeat;
    width: 167px;
    height: 32px;
}

.s_fast_link dd {
    flex: 1;
    margin-left: 30px;
    height: 32px;
    position: relative;
    overflow: hidden;
}

.s_fast_link .bd { overflow: hidden; }

.s_fast_link .bd ul {
    position: relative;
    transition: transform 0.5s ease-in-out;
}

.s_fast_link .bd li {
    display: flex;
    align-items: center;
    height: 32px;
}

.s_fast_link .bd li .box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    position: relative;
}

.s_fast_link .bd a {
    font-size: 14px;
    color: #2b2b2c;
    padding-left: 15px;
    background: url(/skin/images/icon_notice.png) left center no-repeat;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 20px;
    transition: color var(--transition);
}

.s_fast_link .bd a:hover { color: var(--primary); }

.s_fast_link .bd span {
    color: #bcbcbe;
    font-size: 12px;
    line-height: 30px;
    flex-shrink: 0;
}

/* ==========  F1 新闻区  ========== */
#s_main_box .f1 {
    overflow: hidden;
    border-top: 1px solid var(--border);
    padding-top: 45px;
    padding-bottom: 20px;
}

#s_main_box .f1 .main_box {
    display: flex;
    align-items: flex-start;
    gap: 0;
}

/* 左侧图片新闻轮播 */
#slide_news {
    width: 390px;
    height: 250px;
    overflow: hidden;
    position: relative;
    flex-shrink: 0;
}

#slide_news .bd { position: relative; height: 100%; z-index: 2; }
#slide_news .bd ul { position: relative; width: 100%; height: 100%; overflow: hidden; }
#slide_news .bd li {
    position: absolute;
    inset: 0;
    opacity: 0;
    z-index: 0;
    transition: opacity 0.5s ease-in-out;
}
#slide_news .bd li.active { opacity: 1; z-index: 1; }

#slide_news .bd li a {
    display: block;
    width: 100%;
    height: 100%;
    position: relative;
}

#slide_news .bd ul li h1 {
    color: #fff;
    font-size: 14px;
    text-align: center;
    line-height: 40px;
    height: 40px;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 20px;
    position: absolute;
    left: 0;
    bottom: 0;
    z-index: 99999;
    background: rgba(0, 0, 0, 0.7);
}

#slide_news .bd img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

#slide_news .bnt {
    display: block;
    left: 0;
    width: 26px;
    text-align: center;
    height: 54px;
    line-height: 54px;
    top: 50%;
    z-index: 8;
    margin-top: -27px;
    font-size: 24px;
    font-family: "SimSun";
    color: #fff;
    position: absolute;
    background: rgba(0, 0, 0, 0.5);
    transition: background var(--transition), left var(--transition);
    cursor: pointer;
    opacity: 0;
}
#slide_news .bnt.next {
    left: auto;
    right: 0;
}
#slide_news:hover .bnt { opacity: 1; background: #d83648; }
#slide_news .bnt:hover { background: #d83648; }

/* 中间文字新闻 */
#s_news {
    margin-left: 40px;
    flex: 0 0 485px;
    width: 485px;
}

#s_news .pic_news {
    display: block;
    position: relative;
    padding-bottom: 10px;
    margin-bottom: 10px;
    border-bottom: 1px dotted #bababa;
}

#s_news .pic_news h1 {
    position: relative;
    padding-left: 80px;
}

#s_news .pic_news h1 strong {
    position: absolute;
    left: 0;
    top: 0;
    font-size: 18px;
    color: #1f2a61;
}

#s_news .pic_news h1 a {
    display: block;
    margin: 10px 0 8px;
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color var(--transition);
}

#s_news .pic_news p {
    font-size: 14px;
    color: #ababac;
    line-height: 22px;
    height: 64px;
    overflow: hidden;
}

#s_news .text_news {
    height: 188px;
    overflow: hidden;
}

#s_news .text_news li {
    background: url(/skin/images/icon_dd_hotnews.png) no-repeat left center;
    padding-left: 15px;
    position: relative;
    line-height: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#s_news .text_news a {
    font-size: 14px;
    color: var(--text);
    display: block;
    flex: 1;
    margin-right: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color var(--transition);
}

#s_news .text_news span {
    font-size: 12px;
    color: #bcb9b9;
    flex-shrink: 0;
}

#s_news .text_news a:hover { color: var(--primary); }

/* 右侧广告 */
#s_main_box .f1 .right {
    width: 245px;
    overflow: hidden;
    position: relative;
    flex-shrink: 0;
    margin-left: auto;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

#s_main_box .f1 .right a {
    display: block;
    height: 105px;
    overflow: hidden;
}

#s_main_box .f1 .right img {
    display: block;
    width: 245px;
    height: 105px;
    object-fit: cover;
}

/* ==========  F2 产品展示  ========== */
#s_main_box .f2 {
    height: 1066px;
    margin-top: 40px;
    position: relative;
    overflow: hidden;
    background: url(/skin/images/AboutUs.jpg) center top repeat;
}

#s_main_box .f2 .title {
    padding-top: 70px;
    text-align: center;
}

#s_main_box .f2 .title h1 {
    color: #000;
    font-size: 20px;
    line-height: 17px;
    display: block;
    background: url(/skin/images/bg_title_f2.png) center top no-repeat;
    height: 20px;
    text-align: center;
    margin-bottom: 30px;
}

#s_main_box .f2 .title p {
    margin-bottom: 10px;
    color: #858587;
    font-size: 14px;
    display: block;
}

/* Tab 头 */
#s_tab .hd_box {
    display: flex;
    justify-content: space-between;
    margin: 0 auto;
    margin-top: 40px;
    width: 1040px;
    max-width: 100%;
    overflow: hidden;
}

#s_tab .hd_box .li {
    width: 208px;
    cursor: pointer;
    transition: all var(--transition);
}

#s_tab .hd_box .li h1 {
    margin: auto;
    display: block;
    background: url(/skin/images/bg_number.png) no-repeat;
    width: 150px;
    height: 170px;
    transition: all var(--transition);
}

#s_tab .hd_box .li strong {
    font-size: 14px;
    color: #353535;
    display: block;
    text-align: center;
    padding-top: 90px;
    transition: color var(--transition);
}

#s_tab .hd_box .li1 h1 { background-position: 0 0; }
#s_tab .hd_box .li2 h1 { background-position: -197px 0; }
#s_tab .hd_box .li3 h1 { background-position: -395px 0; }
#s_tab .hd_box .li4 h1 { background-position: -594px 0; }
#s_tab .hd_box .li5 h1 { background-position: -791px 0; }

#s_tab .hd_box .li1.on_box h1 { background-position: 0 -170px; }
#s_tab .hd_box .li2.on_box h1 { background-position: -197px -170px; }
#s_tab .hd_box .li3.on_box h1 { background-position: -395px -170px; }
#s_tab .hd_box .li4.on_box h1 { background-position: -594px -170px; }
#s_tab .hd_box .li5.on_box h1 { background-position: -791px -170px; }

#s_tab .hd_box .li.on_box strong { color: var(--primary); }

/* Tab 内容 */
#s_tab .bd_box {
    margin: 40px auto 0;
    height: 286px;
    overflow: hidden;
    max-width: 1040px;
}

#s_tab .bd_box .content {
    width: 100%;
    margin: 0 auto;
    position: relative;
}

#s_tab .bd_box section {
    display: none;
    position: relative;
}

#s_tab .bd_box section.on { display: block; }

#s_tab .bd_box .bd { overflow: hidden; }
#s_tab .bd_box ul {
    display: flex;
    gap: 32px;
    padding: 10px 0;
    height: 265px;
}

#s_tab .bd_box ul li {
    width: 235px;
    background: var(--dark);
    box-shadow: 0 0 8px #dcdcdc;
    flex-shrink: 0;
}

#s_tab .bd_box ul li a {
    display: block;
    color: #fff;
    transition: all var(--transition);
}

#s_tab .bd_box ul li a:hover { transform: translateY(-5px); }

#s_tab .bd_box ul li .pic_box {
    width: 235px;
    height: 170px;
    background: #fff;
    overflow: hidden;
}

#s_tab .bd_box ul li .pic_box img {
    display: block;
    max-width: 235px;
    width: 100%;
    height: 170px;
    object-fit: contain;
    margin: 0 auto;
}

#s_tab .bd_box ul li .text_box {
    padding: 15px;
    color: #fff;
}

#s_tab .bd_box ul li .text_box h1 {
    margin-bottom: 10px;
    font-size: 14px;
    color: #fff;
    display: block;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#s_tab .bd_box ul li .text_box .p {
    font-size: 12px;
    line-height: 18px;
    height: 36px;
    overflow: hidden;
    color: #a7a8ae;
    display: block;
    text-align: center;
}

#s_tab .bnt {
    display: none;
    position: absolute;
    width: 26px;
    height: 54px;
    line-height: 54px;
    text-align: center;
    top: 50%;
    margin-top: -27px;
    z-index: 8;
    font-size: 24px;
    font-family: "SimSun";
    color: #fff;
    background: #d83648;
    cursor: pointer;
    transition: all var(--transition);
}
#s_tab .bnt.prev { left: 0; }
#s_tab .bnt.next { right: 0; }
#s_tab .bd_box .content:hover .bnt { display: block; }

/* F2 底部图片 */
#s_main_box .f2 .pic {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    text-align: center;
}

#s_main_box .f2 .pic img {
    display: block;
    margin: 0 auto;
    max-width: 100%;
}

/* ==========  F3 高级广告(原网站保留位)  ========== */
#s_link_box {
    background: url(/skin/images/bg_f3.jpg) center top no-repeat;
    height: 142px;
    background-size: cover;
}

/* ==========  F4 技术文章 + 工程案例  ========== */
#s_main_box .f4 {
    padding-top: 50px;
    overflow: hidden;
    display: flex;
    gap: 0;
    max-width: var(--max-width);
    margin: 0 auto;
    padding-left: 15px;
    padding-right: 15px;
}

#s_main_box .f4 .title {
    margin-bottom: 20px;
    position: relative;
}

#s_main_box .f4 .title a {
    color: #3f403f;
    font-size: 16px;
    font-weight: 700;
    transition: color var(--transition);
}

#s_main_box .f4 .title a:hover { color: var(--primary); }

#s_main_box .f4 .title .more {
    display: block;
    position: absolute;
    right: 0;
    top: 0;
    font-weight: 400;
    font-size: 12px;
    color: var(--text-muted);
    transition: color var(--transition);
}

#s_main_box .f4 .title .more:hover { color: var(--primary); }

#s_main_box .f4 .left,
#s_main_box .f4 .right {
    border-left: 3px solid #eaeaea;
    position: relative;
    height: 318px;
    padding-left: 28px;
    width: 50%;
    flex-shrink: 0;
}

#s_main_box .f4 .right { border-left-color: #eaeaea; }

#s_main_box .f4 i.line {
    display: block;
    width: 3px;
    z-index: 9;
    height: 30px;
    background: var(--primary);
    position: absolute;
    left: -3px;
    top: 0;
}

#s_main_box .f4 .content {
    position: relative;
    padding-bottom: 10px;
    margin-bottom: 10px;
    border-bottom: 1px dotted #bababa;
    min-height: 85px;
}

#s_main_box .f4 .pic_box {
    position: absolute;
    left: 0;
    top: 0;
    width: 130px;
    height: 85px;
    overflow: hidden;
}

#s_main_box .f4 .pic_box img {
    display: block;
    width: 130px;
    height: 85px;
    object-fit: cover;
    transition: transform 2s ease-in-out;
}

#s_main_box .f4 .pic_box:hover img { transform: scale(1.1); }

#s_main_box .f4 .text_box {
    margin-left: 150px;
    font-size: 14px;
    color: var(--text-light);
    line-height: 28px;
    transition: color var(--transition);
}

#s_main_box .f4 .text_box:hover { color: var(--primary); }

#s_main_box .f4 .text_news {
    position: absolute;
    top: 150px;
    width: calc(100% - 28px);
    left: 28px;
}

#s_main_box .f4 .text_news li {
    background: url(/skin/images/icon_dd_hotnews.png) no-repeat left center;
    padding-left: 15px;
    position: relative;
    line-height: 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#s_main_box .f4 .text_news a {
    font-size: 14px;
    color: var(--text-light);
    display: block;
    flex: 1;
    margin-right: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color var(--transition);
}

#s_main_box .f4 .text_news span {
    font-size: 12px;
    color: #bcb9b9;
    flex-shrink: 0;
}

#s_main_box .f4 .text_news a:hover { color: var(--primary); }

/* ==========  F5 合作伙伴  ========== */
#s_links {
    margin: 55px 0 45px;
    overflow: hidden;
    max-width: var(--max-width);
    padding: 0 0px;
    margin-left: auto;
    margin-right: auto;
}

#s_links .bd {
    overflow: hidden;
}

#s_links ul {
    display: flex;
    flex-wrap: wrap;
    gap: 22.5px;
    overflow: hidden;
    height: auto;
}

#s_links li {
    border: 1px solid #e8e8e8;
    width: 150px;
    margin-bottom: 22px;
    position: relative;
    height: 80px;
    flex-shrink: 0;
    transition: border-color var(--transition);
}

#s_links li a {
    display: block;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

#s_links li img {
    width: 100%;
    height: 100%;
    position: relative;
    opacity: 0.4;
    -webkit-filter: grayscale(1);
    filter: grayscale(1);
    transition: all var(--transition);
    object-fit: contain;
}

#s_links li a:hover img {
    -webkit-filter: none;
    filter: none;
    opacity: 1;
}

#s_links li:hover {
    border-bottom-color: var(--primary);
}

/* ==========  Footer  ========== */
#footer .up_box {
    background: var(--gray);
    padding: 40px 0;
}

#footer .up_box .main_box {
    display: flex;
    align-items: flex-start;
    position: relative;
}

#footer .up_box .fl {
    flex: 1;
    min-width: 0;
}

/* 三个栏目(关于我们/产品中心/新闻中心)在 PC 端横向排列为 3 列 */
#footer .up_box .fl dl {
    display: flex;
    flex-direction: row;
    gap: 0;
    width: 100%;
}

#footer .up_box .fl dd {
    min-width: 60px;
    padding-left: 10px;
    border-right: 1px solid #545359;
    margin-right: 50px;
    padding-right: 60px;
    background: url(/skin/images/icon_dd_red.png) left 9px no-repeat;
}

#footer .up_box .fl dd h1 {
    font-size: 14px;
    color: #fff;
    line-height: 22px;
    margin-bottom: 10px;
}

#footer .up_box .fl dd a {
    display: block;
    font-size: 12px;
    color: #fff;
    opacity: .4;
    line-height: 24px;
    transition: opacity var(--transition);
}

#footer .up_box .fl dd a:hover { opacity: 1; }

#footer .up_box .md {
    width: 550px;
    flex-shrink: 0;
}

#footer .up_box .md .up { margin-bottom: 15px; }

#footer .up_box .md .p {
    color: #9f9fa0;
    font-size: 14px;
    line-height: 30px;
}

#footer .up_box .md .p strong {
    color: #00bcff;
    font-size: 19px;
}

#footer .up_box .ewm_box {
    position: absolute;
    right: 0;
    top: 0;
    display: flex;
    gap: 38px;
}

#footer .up_box .ewm_box .ewm {
    display: block;
}

#footer .up_box .ewm_box img {
    display: block;
    width: 83px;
    height: 83px;
    margin: 0 auto;
}

#footer .up_box .ewm_box span {
    display: block;
    text-align: center;
    font-size: 12px;
    color: #fff;
    opacity: .3;
    padding-top: 10px;
}

/* 搜索表单(仅 UI) */
.search-form {
    position: absolute;
    right: 0;
    top: 130px;
    display: flex;
    align-items: center;
    width: 200px;
}
.search-form .form-tex {
    flex: 1;
    height: 30px;
    line-height: 30px;
    border: 1px solid #545359;
    background: transparent;
    color: #fff;
    font-size: 12px;
    padding: 0 10px;
    outline: none;
}
.search-form .form-tex::placeholder { color: #888; }
.search-form .btn {
    height: 32px;
    padding: 0 18px;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    border: none;
    cursor: pointer;
    transition: background var(--transition);
}
.search-form .btn:hover { background: #0066cc; }

#footer .un_box {
    line-height: 22px;
    padding: 20px 0 18px;
    background: var(--dark-deep);
    text-align: center;
}

#footer .un_box p {
    color: #a7a4a4;
    opacity: .44;
    font-size: 12px;
}

#footer .un_box p a {
    color: #a7a4a4;
    transition: color var(--transition);
}

#footer .un_box p a:hover { color: #fff; }

/* ==========  移动端菜单  ========== */
.mobile-menu-btn {
    display: none;
    position: absolute;
    right: 15px;
    top: 30px;
    width: 30px;
    height: 30px;
    cursor: pointer;
    z-index: 999;
}

.mobile-menu-btn span {
    display: block;
    width: 30px;
    height: 3px;
    background: var(--primary);
    margin: 6px 0;
    transition: all var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

.mobile-menu-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity var(--transition);
}

.mobile-menu-overlay.active { display: block; opacity: 1; }

/* 二级菜单展开按钮 */
.mobile-dropdown-toggle {
    display: none;
    position: absolute;
    right: 15px;
    top: 15px;
    width: 20px;
    height: 20px;
    z-index: 10;
}

.mobile-dropdown-toggle::before,
.mobile-dropdown-toggle::after {
    content: '';
    position: absolute;
    background: #fff;
    transition: transform var(--transition);
}

.mobile-dropdown-toggle::before {
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    margin-top: -1px;
}

.mobile-dropdown-toggle::after {
    top: 0;
    left: 50%;
    width: 2px;
    height: 100%;
    margin-left: -1px;
}

.mobile-dropdown-toggle.active::after { transform: rotate(90deg); }

/* 通用过渡 */
.fade-transition { transition: opacity var(--transition); }

/* ==========  响应式: 平板  ========== */
@media screen and (max-width: 992px) {
    .main_box { padding: 0 15px; }
    #nav li { padding: 0 15px; }
    #nav .list { width: 700px; }
}

/* ==========  响应式: 移动  ========== */
@media screen and (max-width: 768px) {
    body { overflow-x: hidden; }

    .main_box { padding: 0 15px; }

    #header { height: 80px; background-size: cover; }
    #logo_area { height: 80px; left: 15px; }
    #logo_area a img { max-width: 180px; }

    .mobile-menu-btn { display: block; }

    /* Banner */
    #banner { height: auto; }
    #banner .bd li a { height: 200px; background-size: cover; }
    #banner .hd { bottom: 10px; }
    #banner .prev,
    #banner .next { display: none !important; }

    /* 导航: 抽屉式 */
    #nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--dark);
        transition: right var(--transition);
        overflow-y: auto;
        z-index: 9999;
    }
    #nav.active { right: 0; }
    #nav ul { display: block; padding: 60px 0 0; }
    #nav li {
        display: block;
        width: 100%;
        padding: 0;
        margin: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    #nav li .a strong { line-height: 50px; }
    #nav li .a span { height: 50px; }
    #nav li.on i,
    #nav li:hover i { height: 50px; }
    #nav .list {
        position: relative;
        display: none;
        width: 100%;
        height: auto;
        top: 0;
        left: 0;
        background: rgba(0, 0, 0, 0.2);
    }
    #nav .list .box { display: block; padding: 0 15px; }
    #nav .list a {
        display: block;
        line-height: 40px;
        margin: 0;
        padding: 0 15px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        color: #f7f7f7;
    }
    #nav .list a:hover { background: rgba(4, 131, 176, 0.2); color: #f7f7f7; }
    .mobile-dropdown-toggle { display: block; }
    .list_box { display: none; }

    /* 通知公告 */
    .s_fast_link { height: auto; padding: 10px 0; }
    .s_fast_link dl { flex-direction: column; align-items: flex-start; }
    .s_fast_link dt { width: 100%; margin-bottom: 10px; }
    .s_fast_link dd { margin-left: 0; height: auto; }
    .s_fast_link .bd li .box { width: 100%; }
    .s_fast_link .bd a { width: 70%; }

    /* F1 新闻区 */
    #s_main_box .f1 { padding: 20px 0; }
    #s_main_box .f1 .main_box { flex-direction: column; }
    #slide_news,
    #s_news,
    #s_main_box .f1 .right { width: 100%; margin: 0 0 20px; flex: none; }
    #slide_news .bd li a,
    #slide_news .bd img { width: 100%; height: 250px; }
    #s_news { margin-left: 0; }
    #s_main_box .f1 .right { flex-direction: row; }
    #s_main_box .f1 .right a { flex: 1; }

    /* F2 产品 */
    #s_main_box .f2 { padding: 20px 0; height: auto; }
    #s_main_box .f2 .title h1 { font-size: 24px; }
    #s_tab .hd_box { flex-wrap: wrap; gap: 10px; }
    #s_tab .hd_box .li { width: calc(50% - 5px); margin-bottom: 5px; }
    #s_tab .hd_box .li h1 { width: 100px; height: 110px; background-size: 700px 220px; }
    #s_tab .hd_box .li strong { padding-top: 60px; font-size: 12px; }
    #s_tab .hd_box .li1 h1 { background-position: 0 0; }
    #s_tab .hd_box .li2 h1 { background-position: -150px 0; }
    #s_tab .hd_box .li3 h1 { background-position: -300px 0; }
    #s_tab .hd_box .li4 h1 { background-position: -450px 0; }
    #s_tab .hd_box .li5 h1 { background-position: -600px 0; }
    #s_tab .hd_box .li1.on_box h1 { background-position: 0 -110px; }
    #s_tab .hd_box .li2.on_box h1 { background-position: -150px -110px; }
    #s_tab .hd_box .li3.on_box h1 { background-position: -300px -110px; }
    #s_tab .hd_box .li4.on_box h1 { background-position: -450px -110px; }
    #s_tab .hd_box .li5.on_box h1 { background-position: -600px -110px; }
    #s_tab .bd_box { height: auto; }
    #s_tab .bd_box ul { flex-direction: column; height: auto; gap: 15px; }
    #s_tab .bd_box ul li { width: 100%; }
    #s_tab .bd_box ul li .pic_box,
    #s_tab .bd_box ul li .pic_box img { width: 100%; height: 200px; }
    #s_main_box .f2 .pic { position: relative; }

    /* F4 技术文章 + 工程案例: 移动端改正常流, 解决绝对定位导致的内容重叠 */
    #s_main_box .f4 { flex-direction: column; padding-top: 20px; }
    #s_main_box .f4 .left,
    #s_main_box .f4 .right { width: 100%; height: auto; margin-bottom: 25px; padding-left: 15px; }
    #s_main_box .f4 .content {
        position: static;
        min-height: 0;
        padding-bottom: 12px;
        margin-bottom: 8px;
    }
    #s_main_box .f4 .pic_box {
        position: static;
        width: 100%;
        height: auto;
        margin-bottom: 10px;
    }
    #s_main_box .f4 .pic_box img {
        width: 100%;
        height: 160px;
    }
    #s_main_box .f4 .text_box { margin-left: 0; }
    #s_main_box .f4 .text_news {
        position: static;
        width: 100%;
        left: auto;
        top: auto;
    }

    /* F5 合作伙伴 */
    #s_links ul { gap: 10px; }
    #s_links li { width: calc(33.33% - 10px); margin-bottom: 10px; }

    /* Footer */
    #footer .up_box .main_box { flex-direction: column; }
    #footer .up_box .fl { width: 100%; }
    #footer .up_box .fl dl { flex-direction: column; gap: 15px; }
    #footer .up_box .fl dd { width: 100%; margin-right: 0; margin-bottom: 0; border-right: none; padding-right: 10px; }
    #footer .up_box .md { width: 100%; padding-left: 0; margin-top: 20px; }
    #footer .up_box .ewm_box { position: relative; margin-top: 20px; }
    /* 搜索框: 移动端脱离绝对定位, 回到常规流, 避免遮挡导航 */
    #footer .up_box .search-form { position: relative; top: auto; right: auto; width: 100%; margin-top: 20px; }
    #footer .up_box .search-form .form-tex { flex: 1; }
}

/* 小屏手机 */
@media screen and (max-width: 480px) {
    #logo_area a img { max-width: 150px; }
    .mobile-menu-btn { top: 25px; }
    #banner .bd li a { height: 150px; }
    #s_main_box .f2 .title h1 { font-size: 20px; }
    #s_news .pic_news h1 a { font-size: 16px; }
    #s_news .text_news li { line-height: 28px; }
    #s_news .text_news a { font-size: 13px; }
    #s_links li { width: calc(50% - 10px); }

    /* 内页超窄屏补充 */
    #n_title h1 { font-size: 16px; }
    .tab-menu li { padding: 0 10px; font-size: 13px; }
    .product-gallery .main img { height: 200px; }
    #n_nav li { width: 50%; }
    #n_nav li a strong { padding-left: 10px; font-size: 12px; }
    /* F4 超窄屏图片高度收敛 */
    #s_main_box .f4 .pic_box img { height: 140px; }
}

/* =====================================================
 * 内页通用样式 (about / cplist / canpin / newslist / news / titlelist)
 * 复用首页变量、配色，flex 布局替代 float，去除 IE hack
 * ===================================================== */

/* ===== 内页标题 banner ===== */
.bannerny { width: 100%; height: 250px; overflow: hidden; position: relative; }
.banner_about {
    width: 100%;
    height: 250px;
    background-position: center top;
    background-repeat: no-repeat;
    background-size: cover;
}
.banner_about.about   { background-image: url(/skin/images/banner_1.jpg); }
.banner_about.product { background-image: url(/skin/images/banner_0.jpg); }
.banner_about.news    { background-image: url(/skin/images/banner_3.jpg); }
.banner_about.tech    { background-image: url(/skin/images/banner_5.jpg); }

/* ===== 内容容器 ===== */
#n_main_box { margin-bottom: 60px; }
.n_content { min-height: 400px; padding-top: 40px; display: flex; align-items: flex-start; gap: 0; }

/* ===== 面包屑 / 标题 ===== */
#n_title { background: #f7fafc; border-bottom: 1px solid #d9d9dd; position: relative; padding: 15px 0; }
#n_title h1 { font-size: 22px; color: #d10f17; font-weight: 900; line-height: 48px; font-family: Arial, "Microsoft Yahei", sans-serif; }
#n_title h1 span { font-size: 14px; color: #a5a5a5; padding-left: 6px; font-weight: 900; text-transform: uppercase; }
#position {position: absolute; right: 16%; bottom: 0; line-height: 48px; font-size: 12px; color: #98989a; }
#position a { color: #98989a; transition: color var(--transition); }
#position a:hover { color: var(--primary); }
#position i { color: #98989a; margin: 0 6px; font-style: normal; }
#position em { color: var(--primary); font-style: normal; }

/* ===== 左侧栏 ===== */
#n_left { width: 230px; flex-shrink: 0; padding-top: 20px; }
#n_right { flex: 1; min-width: 0; padding-left: 30px; border-left: 1px solid #e5e7e9; padding-top: 10px; }
.n_right2 { flex: 1; min-width: 0; padding-left: 30px; border-left: 1px solid #e5e7e9; padding-top: 10px; }

/* ===== 左侧导航 ===== */
#n_nav { background: #f7fafc; }
#n_nav li { display: block; }
#n_nav li a { display: block; height: 48px; position: relative; overflow: hidden; border-top: 1px solid #ececed; }
#n_nav li:first-child a { border-top: none; }
#n_nav li a strong {
    position: relative;
    z-index: 9;
    display: block;
    height: 48px;
    line-height: 48px;
    font-size: 14px;
    font-weight: 900;
    color: #535355;
    padding-left: 30px;
    transition: color var(--transition);
}
#n_nav li a i { position: absolute; left: 0; top: 0; display: block; background: var(--primary); height: 48px; width: 0; transition: width var(--transition); }
#n_nav li.on a i,
#n_nav li:hover a i { width: 100%; }
#n_nav li.on a strong,
#n_nav li:hover a strong { color: #fff; }

/* ===== 左侧服务热线图 ===== */
#left_slide { margin-top: 20px; border: 1px solid #e5e7e9; }
#left_slide .bd a { display: block; }
#left_slide .bd img { width: 100%; height: auto; display: block; }
#left_slide .bd h1 { font-size: 14px; color: #535355; text-align: center; line-height: 40px; }

/* ===== 推荐文章 (news 详情左栏) ===== */
#left_hot_news { background: #f7fafc; margin-bottom: 20px; padding: 15px; }
#left_hot_news dt strong { display: block; font-size: 15px; color: var(--primary); margin-bottom: 10px; }
#left_hot_news ul { display: block; }
#left_hot_news li { padding: 6px 0; border-bottom: 1px dashed #e2e2e2; }
#left_hot_news li:last-child { border-bottom: none; }
#left_hot_news li a { display: block; font-size: 13px; color: #666; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: color var(--transition); }
#left_hot_news li a:hover { color: var(--primary); }

/* ===== 文章正文 ===== */
.ar_article { padding-top: 6px; }
.ar_article p { font-size: 14px; line-height: 30px; color: #555; margin-bottom: 18px; text-indent: 2em; }
.ar_article p[align="center"] { text-indent: 0; text-align: center; }
.ar_article img { max-width: 100%; height: auto; margin: 10px auto; display: block; }
.ar_article strong { font-weight: 700; color: #333; }

/* ===== 产品列表页 (cplist) ===== */
#n_school { }
#n_school li { position: relative; display: flex; gap: 20px; align-items: center; padding: 20px 0; border-bottom: 1px solid #f1f1f1; }
#n_school li .pic_box { width: 190px; height: 150px; flex-shrink: 0; border: 5px solid #eae9ed; overflow: hidden; }
#n_school li .pic_box img { width: 100%; height: 100%; object-fit: contain; transition: transform var(--transition); }
#n_school li:hover .pic_box img { transform: scale(1.05); }
#n_school li .text_box { flex: 1; min-width: 0; }
#n_school li .text_box h1 { margin-bottom: 10px; }
#n_school li .text_box h1 a { display: block; font-size: 16px; color: #444; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: color var(--transition); }
#n_school li .text_box h1 a:hover { color: var(--primary); }
#n_school li .text_box p { line-height: 24px; color: #a1a1a2; font-size: 13px; height: 48px; overflow: hidden; }

/* ===== 产品详情页 (canpin) ===== */
/* 图片画廊 */
.product-gallery { display: flex; gap: 20px; margin-bottom: 30px; }
.product-gallery .main { width: 440px; flex-shrink: 0; border: 1px solid #e5e5e5; background: #fff; }
.product-gallery .main img { width: 100%; height: 350px; object-fit: contain; display: block; cursor: pointer; }
.product-gallery .info { flex: 1; min-width: 0; }
.product-gallery .info h1.title { font-size: 22px; color: #333; margin-bottom: 20px; font-weight: 700; }
.product-gallery .info .spec { font-size: 14px; line-height: 34px; color: #666; border-top: 1px dashed #eee; padding-top: 15px; }
.product-gallery .info .spec b { color: #d10f17; }
.product-gallery .thumbs { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }
.product-gallery .thumbs img { width: 70px; height: 70px; object-fit: contain; border: 1px solid #ddd; cursor: pointer; transition: border-color var(--transition); background: #fff; }
.product-gallery .thumbs img:hover,
.product-gallery .thumbs img.on { border-color: var(--primary); }

/* Tab */
.tab-wrapper { margin: 10px 0 30px; }
.tab-menu { display: flex; border-bottom: 2px solid var(--primary); }
.tab-menu li { padding: 0 30px; height: 44px; line-height: 44px; font-size: 16px; color: #555; cursor: pointer; transition: color var(--transition); }
.tab-menu li:hover { color: var(--primary); }
.tab-menu li.active { color: #fff; background: var(--primary); }
.tab-content { padding: 25px 0; }
.tab-content > div { display: none; }
.tab-content > div.active { display: block; }
.tab-content p { font-size: 14px; line-height: 30px; color: #555; margin-bottom: 12px; text-indent: 2em; }
.tab-content img { max-width: 100%; height: auto; display: block; margin: 10px auto; }

/* 相关商品 */
#n_wqhg { margin-top: 25px; overflow: hidden; position: relative; }
#n_wqhg .title { margin-bottom: 18px; padding-bottom: 10px; border-bottom: 1px solid #eee; }
#n_wqhg .title h1 { font-size: 18px; color: var(--primary); font-weight: bold; }
#n_wqhg .title h1 strong { color: #666; font-size: 14px; font-weight: normal; text-transform: uppercase; padding-left: 8px; }
#n_wqhg .bd ul { display: flex; gap: 20px; flex-wrap: wrap; }
#n_wqhg .bd li { width: calc(25% - 15px); }
#n_wqhg .bd li a { display: block; }
#n_wqhg .bd .pic_box { height: 160px; overflow: hidden; border: 7px solid #edecf0; }
#n_wqhg .bd .pic_box img { width: 100%; height: 100%; object-fit: contain; }
#n_wqhg .bd li h1 { color: #4b4c4d; font-size: 14px; text-align: center; line-height: 40px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#n_wqhg .bd li a:hover h1 { color: var(--primary); }

/* 推荐商品 / 相关文章 列表 */
#pro_hot { background: #f8f8f8; padding: 30px 35px; margin-top: 40px; }
#pro_hot .title { position: relative; height: 18px; line-height: 18px; padding-left: 12px; margin-bottom: 20px; border-left: 5px solid var(--primary); }
#pro_hot .title h1 { font-size: 18px; color: #666; font-weight: bold; }
#pro_hot ul { display: flex; flex-wrap: wrap; gap: 10px 30px; }
#pro_hot li { width: calc(33.33% - 20px); }
#pro_hot li a { display: block; font-size: 14px; color: #555; line-height: 30px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: color var(--transition); }
#pro_hot li a:hover { color: var(--primary); }

/* 售后保障 */
#after-sale { margin-top: 60px; }
#after-sale .tit { margin-bottom: 20px; }
#after-sale .tit h2 { font-size: 22px; color: #333; }
#after-sale .tit h2 span { font-size: 14px; color: #a5a5a5; padding-left: 8px; }
#after-sale .after-sale-box { display: flex; border: 1px solid #ccc; border-left: none; }
#after-sale .after-sale-box > div { flex: 1; padding: 30px 18px; border-left: 1px solid #ccc; box-sizing: border-box; text-align: center; transition: background-color var(--transition), color var(--transition); }
#after-sale .after-sale-box > div:hover { background: var(--primary); color: #f0f0f0; }
#after-sale .after-sale-box > div i { display: block; font-size: 22px; font-style: normal; width: 56px; height: 56px; line-height: 56px; border-radius: 50%; background: var(--primary); color: #fff; margin: 0 auto 18px; }
#after-sale .after-sale-box > div:hover i { background: rgba(255, 255, 255, .2); color: #fff; }
#after-sale .after-sale-box > div h3 { font-size: 17px; margin-bottom: 14px; }
#after-sale .after-sale-box > div p { display: none; font-size: 12px; line-height: 20px; text-align: left; text-indent: 2em; }
#after-sale .after-sale-box > div ol { display: none; text-align: left; padding-left: 18px; margin-top: 10px; }
#after-sale .after-sale-box > div ol li { font-size: 13px; line-height: 20px; list-style: decimal; margin-bottom: 6px; }
#after-sale .after-sale-box > div:hover p,
#after-sale .after-sale-box > div:hover ol { display: block; }

/* ===== 新闻列表页 (newslist) ===== */
.newslist_left .top { display: flex; gap: 25px; padding-bottom: 20px; margin-bottom: 20px; border-bottom: 1px solid #eee; }
.newslist_left .top dt { width: 298px; flex-shrink: 0; }
.newslist_left .top dt img { width: 298px; height: 180px; object-fit: cover; }
.newslist_left .top dd { flex: 1; min-width: 0; }
.newslist_left .top dd h4 { margin-bottom: 10px; }
.newslist_left .top dd h4 a { font-size: 18px; color: #333; transition: color var(--transition); }
.newslist_left .top dd h4 a:hover { color: var(--primary); }
.newslist_left .top dd em { display: block; font-size: 12px; color: #999; font-style: normal; margin-bottom: 12px; }
.newslist_left .top dd p { font-size: 13px; line-height: 24px; color: #888; height: 72px; overflow: hidden; }
.newslist_left .top dd .more { display: inline-block; margin-top: 8px; color: var(--primary); font-size: 13px; font-weight: 700; }

dl.dl_list { display: flex; gap: 22px; padding: 18px 0; border-bottom: 1px solid #efefef; }
dl.dl_list dt { width: 55px; flex-shrink: 0; text-align: center; }
dl.dl_list dt b { display: block; font-size: 26px; color: #a9a9a9; font-family: Arial; line-height: 1; }
dl.dl_list dt em { display: block; font-size: 12px; color: #a9a9a9; margin-top: 6px; font-style: normal; }
dl.dl_list dd { flex: 1; min-width: 0; }
dl.dl_list dd h4 { margin-bottom: 8px; }
dl.dl_list dd h4 a { font-size: 16px; color: #444; transition: color var(--transition); }
dl.dl_list dd h4 a:hover { color: var(--primary); }
dl.dl_list dd span { font-size: 12px; color: #999; }
dl.dl_list dd p { font-size: 13px; line-height: 24px; color: #888; margin-top: 6px; max-height: 72px; overflow: hidden; }
dl.dl_list:hover dt b { color: var(--primary); }

/* ===== 新闻详情页 (news) ===== */
#n_article { margin-bottom: 20px; }
#n_article .ar_title { border-bottom: 1px dashed #e5e5e5; padding-bottom: 10px; margin-bottom: 10px; }
#n_article .ar_title h1 { font-size: 18px; font-weight: 700; text-align: center; line-height: 25px; margin-bottom: 10px; color: #565659; }
#n_article .ar_title h2 { font-size: 12px; text-align: center; color: #7f8084; line-height: 30px; }
#n_article .ar_article { padding: 30px 0; min-height: 300px; }
.next_news { border-top: 1px solid #eee; padding: 20px 0; display: flex; flex-wrap: wrap; gap: 10px 30px; }
.next_news a { color: #666; font-size: 14px; transition: color var(--transition); }
.next_news a:hover { color: var(--primary); }
.next_news .go_news { margin-left: auto; color: var(--primary); font-weight: 700; }

/* ===== 技术文章列表页 (titlelist) ===== */
.n_news ul { }
.n_news ul li { padding: 28px 0; border-bottom: 1px solid #efefef; }
.n_news ul li .box { display: flex; gap: 22px; align-items: flex-start; }
.n_news ul li .fl { flex: 1; min-width: 0; }
.n_news ul li .fl .date { width: 56px; float: left; margin-right: 18px; text-align: center; }
.n_news ul li .fl .date strong { display: block; font-size: 26px; color: #a9a9a9; font-family: Arial; line-height: 1; }
.n_news ul li .fl .date span { display: block; font-size: 12px; color: #a9a9a9; margin-top: 6px; }
.n_news ul li .fl a h1 { font-size: 16px; color: #646464; margin-bottom: 10px; display: block; line-height: 24px; transition: color var(--transition); }
.n_news ul li .fl a:hover h1 { color: var(--primary); }
.n_news ul li .fl a p { color: #97979d; line-height: 24px; font-size: 13px; }
.n_news ul li:hover .fl .date strong { color: var(--primary); }
.n_news ul li .fr { width: 215px; flex-shrink: 0; }
.n_news ul li .fr img { width: 215px; height: 140px; object-fit: cover; display: block; }

/* ===== 分页 ===== */
.page { margin: 0 auto; }
.page .box { width: 100%; text-align: right; padding-top: 30px; }
.page a, .page b, .page span { display: inline-block; padding: 0 12px; height: 30px; line-height: 30px; border: 1px solid #dedede; margin: 0 2px; color: #555; font-size: 12px; transition: all var(--transition); }
.page a { text-decoration: none; }
.page a:hover, .page b, .page span { background: var(--primary); color: #fff !important; border-color: var(--primary); }

/* ===== 内页响应式 ===== */
@media screen and (max-width: 768px) {
    .bannerny, .banner_about { height: 160px; }
    .n_content { flex-direction: column; }
    #n_left { width: 100%; padding-top: 0; }
    #n_right, .n_right2 { border-left: none; padding-left: 0; width: 100%; }
    #n_nav { width: 100%; }
    #n_nav > ul { display: flex; flex-wrap: wrap; padding-left: 0; }
    #n_nav li { width: 50%; box-sizing: border-box; }
    #n_nav li a { border-top: none; }
    #n_nav li a strong { padding-left: 15px; font-size: 13px; }
    #left_slide { max-width: 280px; }
    .product-gallery { flex-direction: column; }
    .product-gallery .main { width: 100%; }
    #n_school li { flex-direction: column; align-items: flex-start; }
    #n_school li .pic_box { width: 100%; height: 200px; }
    #n_wqhg .bd li { width: calc(50% - 10px); }
    #after-sale .after-sale-box { flex-direction: column; border-left: 1px solid #ccc; }
    #after-sale .after-sale-box > div { border-left: none; border-top: 1px solid #ccc; }
    #after-sale .after-sale-box > div:first-child { border-top: none; }
    .newslist_left .top { flex-direction: column; }
    .newslist_left .top dt, .newslist_left .top dt img { width: 100%; height: auto; }
    .n_news ul li .box { flex-direction: column; }
    .n_news ul li .fr { width: 100%; }
    .n_news ul li .fr img { width: 100%; height: 200px; }
    .n_news ul li .fl .date { float: none; margin: 0 0 8px; text-align: left; }
    #pro_hot li { width: 100%; }

    /* 标题与面包屑: 改为常规流, 避免绝对定位在窄屏重叠 */
    #n_title { padding: 12px 0; }
    #n_title h1 { font-size: 18px; line-height: 1.4; }
    #position { position: static; line-height: 1.6; text-align: left; margin-top: 4px; }

    /* 产品详情 Tab 菜单: 窄屏防溢出 */
    .tab-menu { flex-wrap: wrap; }
    .tab-menu li { padding: 0 16px; font-size: 14px; }

    /* 产品画廊主图高度收敛 */
    .product-gallery .main img { height: 240px; }

    /* 推荐商品/相关文章 内边距收敛 */
    #pro_hot { padding: 20px; }

    /* 售后保障: 移动端无 hover, 默认展开详情文本 */
    #after-sale .after-sale-box > div p,
    #after-sale .after-sale-box > div ol { display: block; }
    #after-sale .after-sale-box > div:hover { background: transparent; color: inherit; }

    /* 技术文章列表缩略图高度收敛 */
    .n_news ul li .fr img { height: 160px; }
}