/* ============================================================
   homepage26.css — 企业通用商铺模板
   专业 · 品质 · 值得信赖
   ============================================================ */
body{overflow-x:hidden;}.top{display:none;}.m{max-width:var(--max-w);margin:0 auto;padding:0 20px;}.m.im-main-full{width:100%;max-width:100%;margin:0;padding:0;}/* ===== 导航栏 · 环保风格（LOGO 居中） ===== */
.im-nav-wrap{background:#fff;position:absolute;top:0;left:0;right:0;z-index:100;padding:0;transition:all .4s;}.im-nav-top{display:flex;align-items:center;justify-content:center;position:relative;height:80px;}.im-logo{flex:1 1 auto;text-align:center;}.im-logo img{height:85px;max-width:220px;object-fit:contain;}.im-menu-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;position:absolute;left:0;top:50%;transform:translateY(-50%);}.im-menu-toggle span{display:block;width:22px;height:2px;background:var(--c1);border-radius:1px;transition:all .3s;}.im-nav ul{display:flex;justify-content:center;list-style:none;margin:0;padding:0;gap:0;}.im-nav li a{white-space:normal;word-break:break-word;min-height:50px;display:flex;align-items:center;justify-content:center;padding:0 22px;line-height:1.25;color:#1a1a1a;font-size:15px;font-weight:500;transition:all .2s;border-bottom:3px solid transparent;text-align:center;}.im-nav li a:hover{color:var(--c1);background:rgba(255,255,255,.06);border-bottom-color:var(--c1);}.im-nav-on a{color:var(--c1);!important;border-bottom-color:var(--c1)!important;background:rgba(255,255,255,.06);}.im-tel{position:absolute;right:0;top:50%;transform:translateY(-50%);display:flex;align-items:center;gap:8px;color:var(--acc);font-size:15px;font-weight:700;}.im-tel svg{width:18px;height:18px;fill:var(--acc);}.im-nav-scrolled{position:fixed;top:0;left:0;right:0;background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.3);}.im-nav-inner-page{position:relative!important;}/* ===== Banner ===== */
.im-banner-wrap{position:relative;overflow:hidden;}.im-banner img{width:100%;display:block;}.slide-banner{position:relative;overflow:hidden;}.slide-banner a{display:none;}.slide-banner a.on{display:block;}.slide-dots{position:absolute;bottom:20px;left:50%;right:auto;transform:translateX(-50%);display:flex;gap:8px;z-index:5;}.slide-dots span{width:20px;height:6px;border-radius:3px;background:rgba(255,255,255,.4);cursor:pointer;transition:all .3s;}.slide-dots span.on{background:var(--c1);width:36px;}.slide-arrow{position:absolute;top:50%;transform:translateY(-50%);background:transparent;border:none;outline:none;border-radius:0;box-shadow:none;width:40px;height:40px;cursor:pointer;z-index:5;display:flex;align-items:center;justify-content:center;transition:all .3s;}.slide-arrow::before{display:none;}.slide-arrow:hover{background:transparent;transform:translateY(-50%) scale(1.1);}.slide-arrow:hover svg{fill:var(--c1);}.slide-arrow svg{width:24px;height:24px;fill:#fff;filter:drop-shadow(0 1px 3px rgba(0,0,0,.4));}.slide-prev{left:0;border-radius:0 4px 4px 0;}.slide-next{right:0;border-radius:4px 0 0 4px;}/* ===== 通用区块 · 全屏宽度 ===== */
.im-sec{padding:80px 0;width:100vw;position:relative;left:50%;margin-left:-50vw;}.im-sec .m{max-width:var(--max-w);margin:0 auto;padding:0 20px;}.im-head{text-align:center;margin-bottom:48px;}.im-label{display:inline-block;font-size:11px;text-transform:uppercase;letter-spacing:3px;color:var(--c1);font-weight:700;padding:4px 16px;border:2px solid var(--c1);margin-bottom:14px;}.im-head h2{font-size:clamp(24px,3vw,34px);font-weight:800;color:var(--ink);margin:0;letter-spacing:1px;}.im-head-light h2{color:#fff;}.im-head-light .im-label{border-color:rgba(255,255,255,.4);color:rgba(255,255,255,.7);}.im-center{text-align:center;margin-top:36px;}/* 分类标签栏 */
.im-type-bar{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:-20px 0 32px;}.im-type-item{display:inline-block;padding:8px 20px;font-size:13px;color:var(--txt);border:1px solid var(--line);border-radius:20px;text-decoration:none;transition:all .25s;}.im-type-item:hover{color:var(--c1);border-color:var(--c1);}.im-type-on{background:var(--c1);color:#fff;border-color:var(--c1);}.im-type-on:hover{color:#fff;}/* ===== 按钮 ===== */
.im-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;font-size:14px;font-weight:600;border-radius:var(--radius);transition:all .25s;text-decoration:none;border:none;cursor:pointer;letter-spacing:.5px;}.im-btn svg{width:18px;height:18px;fill:currentColor;}.im-btn-primary{background:var(--c1);color:#fff;box-shadow:0 4px 14px rgba(var(--c1rgb),.3);}.im-btn-primary:hover{background:var(--c2);transform:translateY(-2px);box-shadow:0 6px 20px rgba(var(--c1rgb),.4);}.im-btn-outline{background:transparent;color:var(--c1);border:2px solid var(--c1);}.im-btn-outline:hover{background:var(--c1);color:#fff;}.im-btn-white{background:#fff;color:var(--c1);font-weight:700;}.im-btn-white:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,.2);}.im-btn-ghost{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.4);}.im-btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;}/* ===== 关于我们 ===== */
.im-about{background:var(--soft);}.im-about-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}.im-about-text h2{font-size:clamp(24px,3vw,34px);font-weight:800;color:var(--ink);margin:14px 0 20px;letter-spacing:1px;}.im-about-text h2 span{color:var(--c1);margin:0 6px;}.im-about-text p{font-size:15px;color:var(--txt);line-height:1.8;margin:0 0 28px;}.im-about-data{display:flex;gap:32px;margin-bottom:32px;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}.im-data-item{text-align:center;}.im-data-item strong{display:block;font-size:28px;font-weight:800;color:var(--c1);}.im-data-item span{font-size:13px;color:var(--txt2);margin-top:4px;display:block;}.im-about-img{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);}.im-about-img img{width:100%;height:auto;display:block;}/* ===== 核心优势 ===== */
.im-adv-sec{background:#fff;}.im-adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}.im-adv-card{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px 20px;text-align:center;transition:all .3s;position:relative;}.im-adv-card::after{content:'';position:absolute;bottom:0;left:0;right:0;height:3px;background:var(--c1);transform:scaleX(0);transition:transform .3s;}.im-adv-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:var(--c1);}.im-adv-card:hover::after{transform:scaleX(1);}.im-adv-icon{width:60px;height:60px;margin:0 auto 20px;background:var(--c1);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:#fff;transition:all .3s;}.im-adv-icon svg{width:28px;height:28px;fill:#fff;}.im-adv-card:hover .im-adv-icon{background:var(--c2);border-radius:50%;}.im-adv-card h3{font-size:17px;font-weight:700;color:var(--ink);margin:0 0 10px;}.im-adv-card p{font-size:13px;color:var(--txt2);line-height:1.7;margin:0;}/* ===== 产品中心 ===== */
.im-prod-sec{background:var(--soft);}.im-prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}.im-prod-card{display:block;position:relative;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:#fff;transition:all .3s;}.im-prod-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--c1);}.im-prod-img{overflow:hidden;}.im-prod-img img{width:100%;height:auto;display:block;transition:transform .5s;}.im-prod-card:hover .im-prod-img img{transform:scale(1.05);}.im-prod-info{padding:14px 16px;display:flex;justify-content:space-between;align-items:center;}.im-prod-name{font-size:14px;font-weight:600;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}.im-prod-link{font-size:12px;color:var(--c1);font-weight:600;white-space:nowrap;}/* ===== 工程案例 · 深色 ===== */
.im-case-sec{background:var(--deep);}.im-case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;}.im-case-card{display:block;position:relative;overflow:hidden;border-radius:var(--radius-lg);cursor:pointer;}.im-case-card img{width:100%;height:auto;transition:transform .5s;}.im-case-card:hover img{transform:scale(1.06);}.im-case-overlay{position:absolute;bottom:0;left:0;right:0;padding:20px 14px 14px;background:linear-gradient(0,rgba(0,0,0,.75),transparent);transform:translateY(100%);transition:transform .35s;}.im-case-card:hover .im-case-overlay{transform:translateY(0);}.im-case-name{color:#fff;font-size:14px;font-weight:600;}/* ===== CTA ===== */
.im-cta-sec{background:linear-gradient(135deg,var(--c1),var(--c2));padding:56px 0;}.im-cta-inner{text-align:center;}.im-cta-inner h2{color:#fff;font-size:clamp(22px,2.8vw,32px);font-weight:800;margin:0 0 10px;}.im-cta-inner p{color:rgba(255,255,255,.75);font-size:15px;margin:0 0 28px;}.im-cta-btns{display:flex;justify-content:center;gap:16px;}/* ===== 企业动态 ===== */
.im-news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}.im-news-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;transition:all .3s;text-decoration:none;}.im-news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}.im-news-img{overflow:hidden;}.im-news-img img{width:100%;height:auto;transition:transform .5s;}.im-news-card:hover .im-news-img img{transform:scale(1.05);}.im-news-body{padding:18px;flex:1;}.im-news-date{font-size:12px;color:var(--c1);font-weight:600;display:block;margin-bottom:8px;}.im-news-body h3{font-size:15px;font-weight:700;color:var(--ink);margin:0 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}.im-news-body p{font-size:13px;color:var(--txt2);line-height:1.6;margin:0;}/* ===== 页脚 ===== */
.im-footer{background:var(--deep);color:rgba(255,255,255,.5);width:100vw;position:relative;left:50%;margin-left:-50vw;}.im-footer .m{max-width:var(--max-w);margin:0 auto;padding:0 20px;}.im-foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:52px 0 32px;}.im-foot-col h4{color:#fff;font-size:15px;font-weight:700;margin:0 0 20px;padding-bottom:12px;position:relative;letter-spacing:1px;}.im-foot-col h4::after{content:'';position:absolute;left:0;bottom:0;width:28px;height:3px;background:var(--c1);border-radius:2px;}.im-foot-col p{font-size:13px;line-height:1.9;margin:0;}.im-foot-col ul{list-style:none;margin:0;padding:0;}.im-foot-col ul li{margin-bottom:10px;}.im-foot-col ul li a{color:rgba(255,255,255,.45);font-size:13px;transition:color .2s;text-decoration:none;}.im-foot-col ul li a:hover{color:var(--c1);}.im-foot-brand-name{font-size:20px;font-weight:800;color:#fff;margin-bottom:16px;}.im-foot-brand-name img{height:44px;max-width:180px;object-fit:contain;filter:brightness(0) invert(1);}.im-foot-socials{display:flex;gap:10px;margin-top:18px;}.im-foot-socials a{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.7);transition:all .25s;text-decoration:none;}.im-foot-socials a svg{width:18px;height:18px;fill:currentColor;}.im-foot-socials a:hover{background:var(--c1);color:#fff;transform:translateY(-3px);}.im-foot-nav{display:grid;grid-template-columns:1fr 1fr;gap:0 16px;}.im-foot-contact li{display:flex;align-items:flex-start;gap:8px;font-size:13px;line-height:1.6;}.im-foot-contact svg{width:15px;height:15px;fill:var(--c1);flex-shrink:0;margin-top:2px;}.im-foot-links{border-top:1px solid rgba(255,255,255,.06);padding:16px 0;}.im-foot-links .m{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:13px;}.im-foot-links span{color:rgba(255,255,255,.35);}.im-foot-links a{color:rgba(255,255,255,.3);transition:color .2s;text-decoration:none;}.im-foot-links a:hover{color:var(--c1);}.im-foot-bottom{border-top:1px solid rgba(255,255,255,.06);padding:16px 0;font-size:12px;}.im-foot-bottom-in{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;}.im-foot-bottom i{margin:0 8px;opacity:.3;}.im-foot-bottom a{color:rgba(255,255,255,.4);transition:color .2s;text-decoration:none;}.im-foot-bottom a:hover{color:var(--c1);}/* ===== 联系我们 + 在线留言 ===== */
.im-contact-sec{background:var(--soft);}.im-contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:stretch;}.im-contact-info,.im-contact-msg{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:36px;}.im-contact-info h2,.im-contact-msg h2{font-size:24px;font-weight:800;color:var(--ink);margin:8px 0 20px;}.im-contact-list{list-style:none;margin:0;padding:0;}.im-contact-list li{font-size:15px;color:var(--txt);line-height:2.3;}.im-contact-list b{color:var(--ink);font-weight:600;}.im-contact-msg{background:linear-gradient(135deg,rgba(0,0,0,.5),rgba(0,0,0,.7)),linear-gradient(135deg,var(--c1,#1f2f47),var(--c2,#2a3e5c));color:#fff;}.im-contact-msg .im-label{color:rgba(255,255,255,.75);border-color:rgba(255,255,255,.4);}.im-contact-msg h2{color:#fff;}.im-contact-msg p{font-size:15px;line-height:1.9;color:rgba(255,255,255,.85);margin:0 0 28px;}.im-contact-msg .im-btn-primary{background:#fff;color:var(--c1);box-shadow:0 4px 16px rgba(0,0,0,.15);}.im-contact-msg .im-btn-primary:hover{background:var(--soft);}/* ===== 移动端 ===== */
@media screen and (max-width:768px){.im-nav-wrap{background:#fff;position:relative;}.im-nav-top{height:auto;padding:10px 0;position:relative;}.im-logo{flex:none;text-align:left;}.im-logo img{height:65px;}.im-menu-toggle{display:flex;left:auto;right:0;}.im-menu-toggle.on span:nth-child(1){transform:translateY(7px) rotate(45deg);}.im-menu-toggle.on span:nth-child(2){opacity:0;}.im-menu-toggle.on span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}.im-nav{background:#fff;display:none;}.im-nav.open{display:block;position:absolute;top:100%;left:0;right:0;background:#fff;box-shadow:var(--shadow-md);}.im-nav.open ul{flex-direction:column;}.im-nav.open li a{line-height:44px;padding:0 20px;border-bottom:1px solid var(--line);color:#1a1a1a;}.im-tel{display:none;}.im-nav-scrolled{background:#fff;position:relative;box-shadow:none;}.im-sec{padding:48px 0;}.im-about-grid{grid-template-columns:1fr;gap:28px;}.im-about-data{gap:20px;}.im-data-item strong{font-size:22px;}.im-adv-grid{grid-template-columns:1fr 1fr;gap:12px;}.im-adv-card{padding:24px 14px;}.im-prod-grid{grid-template-columns:1fr 1fr;gap:10px;}.im-case-grid{grid-template-columns:1fr 1fr;}.im-cta-btns{flex-direction:column;align-items:center;}.im-cta-btns .im-btn{width:100%;justify-content:center;}.im-news-grid{grid-template-columns:1fr;}.im-contact-grid{grid-template-columns:1fr;}.im-foot-grid{grid-template-columns:1fr;gap:24px;}.im-foot-bottom-in{justify-content:center;text-align:center;}}@media screen and (max-width:480px){.im-adv-grid{grid-template-columns:1fr;}.im-prod-grid{grid-template-columns:1fr 1fr;gap:8px;}.im-case-grid{grid-template-columns:1fr;}}/* ==== 大图沉浸风格 ==== */
:root{--c1:#1e3a8a;--c2:#1e40af;--deep:#0f172a;--deep2:#1e293b;--c1rgb:30,58,138;--c2rgb:30,64,175;--acc:#f59e0b;--acc2:#38bdf8;--ink:#1e293b;--txt:#475569;--txt2:#94a3b8;--bg:#fff;--soft:#f8fafc;--line:#e2e8f0;--radius:0px;--radius-lg:0px;--shadow-sm:0 1px 3px rgba(0,0,0,.08);--shadow-md:0 4px 20px rgba(0,0,0,.08);--shadow-lg:0 10px 40px rgba(0,0,0,.1);--max-w:1440px;--grad:linear-gradient(135deg,#0f172a 0%,#1e40af 50%,#3b82f6 100%);}.im-sec{padding:0;width:100vw;position:relative;left:50%;margin-left:-50vw;}.im-sec .m{max-width:var(--max-w);margin:0 auto;padding:0 20px;}.im-case-grid{grid-template-columns:repeat(2,1fr);gap:0;}.im-case-card:first-child{grid-column:span 2;}.im-case-card{border-radius:0;}.im-case-overlay{transform:none;background:linear-gradient(0,rgba(0,0,0,.85),transparent);padding:40px 20px 20px;}.im-case-name{font-size:17px;}.im-about{padding:80px 0;}.im-about-grid{min-height:520px;align-items:center;}.im-cta-sec{background:linear-gradient(rgba(15,23,42,.88),rgba(15,23,42,.88));min-height:320px;display:flex;align-items:center;}.im-head h2{font-size:clamp(28px,4vw,46px);font-weight:800;}/* ===== 桌面端导航：LOGO 左，栏目菜单右（头部背景统一） ===== */
@media screen and (min-width:769px){.im-nav-wrap .m{display:flex;align-items:center;justify-content:space-between;height:80px;}.im-nav-top{display:flex;align-items:center;justify-content:flex-start;position:static;height:auto;flex:0 1 auto;gap:24px;}.im-logo{flex:none;text-align:left;}.im-tel{position:static;transform:none;right:auto;top:auto;flex:none;}.im-nav{display:flex;align-items:center;justify-content:flex-end;flex:1 1 auto;min-width:0;}.im-nav ul{display:flex;justify-content:flex-end;}}/* ===== 差异化导航：大图沉浸（悬浮毛玻璃胶囊 + 渐变发光下划线 + 滚动收缩） ===== */
@media screen and (min-width:769px){.im-nav-wrap{background:#fff;border-bottom:none;padding:16px 0;transition:padding .3s;}.im-nav-wrap .m{display:flex;align-items:center;justify-content:space-between;height:85px;background:#fff;border-radius:50px;box-shadow:0 10px 40px rgba(0,0,0,.1);padding:0 26px;border:1px solid rgba(0,0,0,.06);transition:height .3s,background .3s;}.im-nav-top{display:flex;align-items:center;height:auto;flex:0 1 auto;gap:0;}.im-logo{flex:none;text-align:left;}.im-tel{position:static;transform:none;margin-left:22px;color:#1a1a1a;}.im-nav{display:flex;align-items:center;justify-content:flex-end;flex:1 1 auto;min-width:0;}.im-nav ul{display:flex;justify-content:flex-end;}.im-nav li a{white-space:normal;word-break:break-word;min-height:85px;display:flex;align-items:center;justify-content:center;position:relative;line-height:1.25;padding:0 20px;border-bottom:none;color:#1a1a1a;font-weight:500;transition:color .25s,line-height .3s;text-align:center;}.im-nav li a::after{content:'';position:absolute;left:50%;bottom:8px;width:0;height:3px;border-radius:3px;background:linear-gradient(90deg,transparent,var(--c1),transparent);transform:translateX(-50%);transition:width .3s;box-shadow:0 0 12px var(--c1);}.im-nav li a:hover{color:var(--c1);}.im-nav li a:hover::after,.im-nav-on a::after{width:34px;}.im-nav-on a{color:var(--c1);}.im-nav-scrolled{background:#fff;padding:10px 0;}.im-nav-scrolled .m{height:56px;background:#fff;}.im-nav-scrolled .im-nav li a{white-space:normal;word-break:break-word;min-height:56px;display:flex;align-items:center;justify-content:center;line-height:1.25;text-align:center;}}