:root{
  --home-primary:#2563eb;          /* 主色（品牌蓝） */
  --home-on-primary:#FFFFFF;       /* 主色上的前景 */
  --header-primary:#2563eb;
  --header-on-primary:#FFFFFF;
  --banner-accent:#2563eb;
  --banner-on-accent:#FFFFFF;
  --news-accent-orange:#FBBF24;    /* 琥珀强调 */
  --cases-title-accent:#FBBF24;
  --footer-bg:#2563eb;
  --footer-fg:#FFFFFF;
}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#333;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%}
a{color:inherit}
.container{margin:0 auto;max-width:1200px;padding:0 20px;box-sizing:border-box}
.yb-newslist{list-style:none;margin:0;padding:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
/* 列表区块空态提示：任一取数列表有内容时自动隐藏 */
.yb-empty{display:block;grid-column:1/-1;margin:0;padding:26px 18px;border:1px dashed rgba(37,99,235,.35);border-radius:12px;background:rgba(255,255,255,.7);color:#7a8a83;font-size:14px;text-align:center}
.yb-newslist:not(:empty) ~ .yb-empty{display:none}
.pc-only{display:flex}
.wap-only{display:none!important}
/* ============================ 顶栏 / 品牌 / 主导航 ============================ */
.site-header-wrap{flex-shrink:0;background:#fff}
.site-header__top{background:#f8f9fa;border-bottom:1px solid rgba(229,231,235,.8);color:#6b7280;font-size:12px;line-height:1.4}
.site-header__top-inner{align-items:center;box-sizing:border-box;display:flex;gap:12px;justify-content:space-between;min-height:36px;padding:8px 20px}
.site-header__top-right{align-items:center;color:#6b7280;display:flex;gap:20px}
.site-header__contact-item{align-items:center;display:inline-flex;font-size:13px;gap:6px;transition:color .3s}
.site-header__contact-item:hover{color:var(--header-primary)}
.site-header__contact-item--link{color:inherit;font-weight:500;text-decoration:none}
.site-header__contact-icon{color:var(--header-primary);height:14px;opacity:.8;width:14px;display:block}
.site-header__brand{background:#fff}
.site-header__brand-inner{align-items:center;display:flex;flex-wrap:wrap;gap:24px;padding:16px 20px}
.site-header__logo{align-items:center;color:var(--header-primary);display:flex;gap:10px;flex-shrink:0;text-decoration:none}
.site-header__logo-mark{align-items:center;display:flex;flex-shrink:0;height:48px;justify-content:flex-start;max-width:220px}
.site-header__logo-img{display:block;height:48px;max-width:100%;object-fit:contain;width:auto}
.site-header__logo-text{color:var(--header-primary);font-size:22px;font-weight:700;letter-spacing:.06em;line-height:1.3}
.site-header__hotline{align-items:center;color:var(--header-primary);display:inline-flex;flex-shrink:0;gap:12px;margin-left:auto;text-decoration:none}
.site-header__hotline-icon{align-items:center;background:color-mix(in srgb,var(--header-primary) 10%,transparent);border-radius:50%;color:var(--header-primary);display:flex;height:40px;justify-content:center;padding:8px;width:40px;box-sizing:border-box}
.site-header__hotline-icon svg{display:block;height:100%;width:100%}
.site-header__hotline-content{display:flex;flex-direction:column}
.site-header__hotline-label{color:#6b7280;font-size:12px;line-height:1;margin-bottom:6px}
.site-header__hotline-num{font-size:22px;font-weight:700;letter-spacing:.02em;line-height:1}
.site-header__nav{background:var(--header-primary);box-shadow:0 4px 12px color-mix(in srgb,var(--header-primary) 20%,transparent);position:relative}
.site-header__nav-inner{align-items:stretch;display:flex;flex-wrap:wrap;gap:4px;justify-content:flex-start;margin:0 auto;max-width:1200px;padding:0 20px;position:relative;box-sizing:border-box}
.site-header__nav-home,.site-header__nav-inner .yb-nav>li>a{border-radius:8px 8px 0 0;color:var(--header-on-primary);display:block;font-size:16px;font-weight:500;margin-top:8px;opacity:.92;padding:16px 30px;position:relative;text-align:center;text-decoration:none;transition:all .3s ease;white-space:nowrap;box-sizing:border-box}
.site-header__nav-inner .yb-nav{display:flex;flex-wrap:wrap;gap:0;margin:0;padding:0;list-style:none}
.site-header__nav-inner .yb-nav>li{position:relative;list-style:none;margin:0}
.site-header__nav-home:hover,.site-header__nav-inner .yb-nav>li>a:hover{background:rgba(255,255,255,.14);opacity:1}
.site-header__nav-home.on,.site-header__nav-inner .yb-nav>li.on>a{background:rgba(255,255,255,.2);color:#fff;font-weight:700;opacity:1}
.site-header__nav-inner .yb-nav__sub{display:none;position:absolute;top:100%;left:0;z-index:30;min-width:170px;margin:0;padding:8px;list-style:none;background:#fff;border:1px solid rgba(229,231,235,.9);border-radius:0 0 12px 12px;box-shadow:0 18px 44px rgba(0,0,0,.14)}
.site-header__nav-inner .yb-nav>li:hover>.yb-nav__sub{display:block}
.site-header__nav-inner .yb-nav__sub li{list-style:none}
.site-header__nav-inner .yb-nav__sub a{display:block;padding:10px 14px;border-radius:8px;color:#374151;font-size:14px;font-weight:500;text-decoration:none;transition:background .2s ease,color .2s ease}
.site-header__nav-inner .yb-nav__sub a:hover{background:color-mix(in srgb,var(--header-primary) 9%,#fff);color:var(--header-primary)}
.site-header__nav-inner .yb-nav__sub .yb-nav__sub{top:0;left:100%}
/* ============================ 首屏 Banner ============================ */
.maxBanner{aspect-ratio:1920/560;left:0;max-height:800px;min-height:400px;right:0;top:0;width:100%;position:relative;overflow:hidden;background:linear-gradient(135deg,#1e40af,#2563eb 55%,#60a5fa);box-sizing:border-box}
.slide-track{position:absolute;inset:0}
.slide-content{position:absolute;inset:0;opacity:0;pointer-events:none;transition:opacity .9s ease}
.slide-track:not(.is-ready) .slide-content:first-child,.slide-content.is-active{opacity:1;pointer-events:auto}
.slide-img{display:block;height:100%;object-fit:cover;object-position:center;width:100%}
.slide-link{position:absolute;inset:0;z-index:2}
.slide-link[href=""],.slide-link[href="#"]{display:none}
/* 左右切换按钮（hover/键盘聚焦有明确反馈） */
.banner-nav{align-items:center;backdrop-filter:blur(6px);background:rgba(17,24,39,.4);border:1px solid rgba(255,255,255,.38);border-radius:999px;color:#fff;cursor:pointer;display:flex;height:46px;justify-content:center;padding:0;position:absolute;top:50%;transform:translateY(-50%);transition:background .25s ease,transform .25s ease,box-shadow .25s ease;width:46px;z-index:12}
.banner-nav:hover{background:rgba(17,24,39,.78);box-shadow:0 12px 30px rgba(0,0,0,.22);transform:translateY(-50%) scale(1.06)}
.banner-nav:active{transform:translateY(-50%) scale(.96)}
.banner-nav:focus-visible{outline:2px solid #fff;outline-offset:3px}
.banner-nav svg{fill:none;height:20px;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:2.2;width:20px}
.banner-nav--prev{left:22px}
.banner-nav--next{right:22px}
.banner-nav.is-hidden{display:none!important}
/* 数量显示（当前/总数） */
.banner-switch{align-items:center;background:rgba(17,24,39,.55);border-radius:999px;bottom:16px;box-shadow:0 16px 36px rgba(0,0,0,.16);color:#fff;display:inline-flex;gap:8px;padding:6px 12px;position:absolute;right:22px;z-index:12}
.banner-switch.is-hidden{display:none!important}
.banner-switch__text{font-size:13px;font-weight:700;letter-spacing:.02em;min-width:40px;text-align:center;font-variant-numeric:tabular-nums}
/* ============================ 产品展示 ============================ */
.product-show{background:#fff;padding:60px 0}
.product-show__title-wrap{align-items:center;display:flex;flex-direction:column;gap:10px;justify-content:center;margin-bottom:48px;text-align:center}
.product-show__title{align-items:center;background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--home-primary) 14%,#fff),transparent);border-radius:999px;box-shadow:0 10px 26px color-mix(in srgb,var(--home-primary) 14%,transparent);color:#111;display:inline-flex;font-size:32px;font-weight:800;justify-content:center;letter-spacing:.06em;margin:0;padding:8px 18px}
.product-show__title-accent{height:14px;position:relative;width:min(240px,62vw)}
.product-show__title-accent:before{background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--home-primary) 55%,#111827),transparent);border-radius:999px;content:"";height:2px;left:0;opacity:.5;position:absolute;right:0;top:50%;transform:translateY(-50%)}
.product-show__title-accent:after{background:var(--home-primary);border-radius:999px;box-shadow:0 0 0 7px color-mix(in srgb,var(--home-primary) 18%,transparent);content:"";height:10px;left:50%;position:absolute;top:50%;transform:translate(-50%,-50%);width:10px}
.product-show__grid{display:grid;gap:20px;grid-template-columns:repeat(4,minmax(0,1fr))}
.product-show__grid .yb-newslist{display:contents}
.product-show__home-card{background:#fff;border:1px solid #e5e5e5;border-radius:6px;box-shadow:0 2px 8px rgba(0,0,0,.04);margin:0;overflow:hidden;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}
.product-show__home-card:hover{border-color:var(--home-primary);box-shadow:0 8px 20px rgba(0,0,0,.08);transform:translateY(-4px)}
.product-show__home-link{color:inherit;display:flex;flex-direction:column;height:100%;text-decoration:none}
.product-show__home-img-wrap{aspect-ratio:1/1;background:#f8f9fa;box-sizing:border-box;overflow:hidden;padding:10px;position:relative;width:100%;display:flex;align-items:center;justify-content:center}
.product-show__home-img{display:block;height:100%;object-fit:contain;transition:transform .4s ease;width:100%}
.product-show__home-card:hover .product-show__home-img{transform:scale(1.05)}
.product-show__home-img-ph{background:linear-gradient(145deg,#e8ebe8,#f5f6f5 50%,#dde3dd);height:100%;min-height:120px;width:100%;color:#8fa69c;display:flex;align-items:center;justify-content:center;font-size:13px}
.product-show__home-name{background:#fff;border-top:1px solid #f0f0f0;color:#333;display:-webkit-box;font-size:15px;font-weight:600;line-clamp:2;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;padding:14px 12px;text-align:center;transition:color .3s ease,background .3s ease;flex:1}
.product-show__home-card:hover .product-show__home-name{background:var(--home-primary);color:var(--home-on-primary,#fff)}
/* ============================ 为什么选择我们 ============================ */
.choose-us{background:linear-gradient(180deg,color-mix(in srgb,var(--home-primary) 6%,#f8fafc) 0,#fff 40%,color-mix(in srgb,var(--news-accent-orange) 5%,#f8fafc)),radial-gradient(1000px 520px at 10% 8%,color-mix(in srgb,var(--home-primary) 16%,transparent) 0,transparent 62%),radial-gradient(1000px 520px at 92% 18%,color-mix(in srgb,var(--news-accent-orange) 14%,transparent) 0,transparent 60%);overflow:hidden;padding:90px 0;position:relative}
.choose-us:before{background-image:radial-gradient(color-mix(in srgb,var(--home-primary) 22%,transparent) 1px,transparent 1px);background-size:20px 20px;content:"";pointer-events:none;position:absolute;inset:0;-webkit-mask-image:radial-gradient(circle at 50% 10%,#000 0,transparent 72%);mask-image:radial-gradient(circle at 50% 10%,#000 0,transparent 72%);opacity:.16}
.choose-us__title-wrap{align-items:center;display:flex;flex-direction:column;gap:10px;justify-content:center;margin-bottom:44px;text-align:center;position:relative;z-index:1}
.choose-us__title{align-items:center;background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--home-primary) 12%,#fff),transparent);border-radius:999px;box-shadow:0 10px 26px color-mix(in srgb,var(--home-primary) 12%,transparent);color:#111827;display:inline-flex;font-size:34px;font-weight:800;justify-content:center;letter-spacing:.06em;margin:0;padding:8px 18px}
.choose-us__title-accent{height:14px;position:relative;width:min(260px,66vw)}
.choose-us__title-accent:before{background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--home-primary) 55%,#111827),transparent);border-radius:999px;content:"";height:2px;left:0;opacity:.5;position:absolute;right:0;top:50%;transform:translateY(-50%)}
.choose-us__title-accent:after{background:var(--home-primary);border-radius:999px;box-shadow:0 0 0 7px color-mix(in srgb,var(--home-primary) 18%,transparent);content:"";height:10px;left:50%;position:absolute;top:50%;transform:translate(-50%,-50%);width:10px}
.choose-us__list{display:flex;flex-direction:column;gap:40px;position:relative;z-index:1}
.choose-us__list:before{content:"";backdrop-filter:blur(6px);background:linear-gradient(180deg,rgba(255,255,255,.86),rgba(255,255,255,.62));border:1px solid rgba(229,231,235,.75);border-radius:26px;box-shadow:0 36px 90px -70px rgba(17,24,39,.55);height:calc(100% + 36px);left:50%;position:absolute;top:-18px;transform:translate(-50%);width:min(1080px,92vw);z-index:-1}
.choose-us__row{align-items:center;background:linear-gradient(180deg,#fff,rgba(255,255,255,.88));border:1px solid rgba(229,231,235,.65);border-radius:20px;box-shadow:0 14px 34px -16px rgba(17,24,39,.18);display:grid;gap:60px;grid-template-columns:1fr 1fr;padding:40px;margin:0;transition:box-shadow .3s ease,border-color .3s ease}
.choose-us__row:hover{border-color:color-mix(in srgb,var(--home-primary) 26%,rgba(229,231,235,.65));box-shadow:0 26px 52px -22px rgba(17,24,39,.28)}
.choose-us__row:hover .choose-us__photo{transform:scale(1.03)}
.choose-us__row--reverse{direction:rtl}
.choose-us__row--reverse .choose-us__media,.choose-us__row--reverse .choose-us__text{direction:ltr}
.choose-us__text{display:flex;flex-direction:column;gap:14px;padding:12px 20px;position:relative}
.choose-us__text:before{background:linear-gradient(180deg,color-mix(in srgb,var(--home-primary) 70%,#fff),color-mix(in srgb,var(--news-accent-orange) 55%,#fff));border-radius:999px;content:"";bottom:12px;left:0;opacity:.9;position:absolute;top:12px;width:4px}
.choose-us__num-wrap{align-items:center;display:flex;gap:16px;margin:0}
.choose-us__num{align-items:center;background:var(--home-primary);border-radius:14px;box-shadow:0 4px 12px color-mix(in srgb,var(--home-primary) 30%,transparent);color:#fff;display:flex;font-family:"Segoe UI",Arial,sans-serif;font-size:24px;font-weight:700;height:52px;justify-content:center;line-height:1;width:52px}
.choose-us__h3{color:#1f2937;font-size:24px;font-weight:700;letter-spacing:.02em;line-height:1.35;margin:0}
.choose-us__desc{background:linear-gradient(90deg,color-mix(in srgb,var(--home-primary) 6%,rgba(255,255,255,.92)) 0,rgba(255,255,255,.85) 55%,rgba(255,255,255,.72));border:1px solid rgba(229,231,235,.7);border-radius:14px;box-shadow:0 10px 22px -18px rgba(17,24,39,.25);color:#4b5563;font-size:16px;line-height:1.9;margin:0;padding:14px 16px;white-space:pre-line}
.choose-us__media{aspect-ratio:16/10;background:#e5e7eb;border-radius:12px;overflow:hidden;position:relative}
.choose-us__photo{display:block;height:100%;object-fit:cover;transition:transform .5s ease;width:100%}
/* ============================ 案例中心 ============================ */
.eng-cases{background:var(--home-primary);overflow:hidden;padding:80px 0;position:relative}
.eng-cases:before{background:repeating-radial-gradient(circle at 18% 30%,rgba(255,255,255,.18) 0,rgba(255,255,255,.18) 1px,transparent 10px,transparent 22px),repeating-radial-gradient(circle at 78% 18%,rgba(255,255,255,.14) 0,rgba(255,255,255,.14) 1px,transparent 12px,transparent 26px),radial-gradient(900px 420px at 50% -10%,rgba(255,255,255,.16) 0,transparent 65%);content:"";inset:-30%;opacity:.22;pointer-events:none;position:absolute;transform:rotate(-6deg)}
.eng-cases__inner{margin:0 auto;max-width:1200px;padding:0 20px;position:relative;z-index:1;box-sizing:border-box}
.eng-cases__head{align-items:center;display:flex;flex-direction:column;gap:10px;justify-content:center;margin-bottom:60px;text-align:center}
.eng-cases__title{background:linear-gradient(90deg,rgba(255,255,255,0),rgba(255,255,255,.12),rgba(255,255,255,0));border:1px solid rgba(255,255,255,.16);border-radius:999px;box-shadow:0 12px 30px rgba(0,0,0,.26);color:#fff;display:inline-flex;font-size:36px;font-weight:800;letter-spacing:.05em;margin:0;padding:8px 18px}
.eng-cases__title-accent{height:14px;position:relative;width:min(260px,66vw)}
.eng-cases__title-accent:before{background:linear-gradient(90deg,transparent,rgba(255,255,255,.95),transparent);border-radius:999px;content:"";height:2px;left:0;opacity:.65;position:absolute;right:0;top:50%;transform:translateY(-50%)}
.eng-cases__title-accent:after{background:#fff;border-radius:999px;box-shadow:0 0 0 7px rgba(255,255,255,.18);content:"";height:10px;left:50%;position:absolute;top:50%;transform:translate(-50%,-50%);width:10px}
.eng-cases__grid{display:grid;gap:20px;grid-template-columns:repeat(4,minmax(0,1fr));align-items:stretch}
.eng-cases__grid .yb-newslist{display:contents}
.eng-cases__card{backdrop-filter:blur(4px);background:rgba(255,255,255,.95);border:1px solid rgba(255,255,255,.22);border-radius:16px;box-shadow:0 14px 34px rgba(0,0,0,.16);display:flex;flex-direction:column;margin:0;overflow:hidden;position:relative;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}
.eng-cases__card:hover{border-color:rgba(255,255,255,.36);box-shadow:0 22px 46px rgba(0,0,0,.24);transform:translateY(-8px)}
.eng-cases__card:hover .eng-cases__img{transform:scale(1.06)}
.eng-cases__card:hover .eng-cases__img-overlay{opacity:.9}
.eng-cases__card-link{display:flex;flex-direction:column;color:inherit;text-decoration:none;height:100%}
.eng-cases__img-wrap{aspect-ratio:16/9;background:#0f172a;overflow:hidden;position:relative}
.eng-cases__img-ph{background:linear-gradient(160deg,#aeb6ae,#7d887e 45%,#4e564f);inset:0;position:absolute;color:rgba(255,255,255,.85);display:flex;align-items:center;justify-content:center;font-size:13px;text-align:center;padding:10px;box-sizing:border-box}
.eng-cases__img-overlay{background:linear-gradient(180deg,rgba(17,24,39,0),rgba(17,24,39,.08) 46%,rgba(17,24,39,.38));inset:0;opacity:.82;pointer-events:none;position:absolute;transition:opacity .35s ease;z-index:1}
.eng-cases__img{display:block;height:100%;object-fit:cover;position:relative;transition:transform .55s ease;width:100%;z-index:2}
.eng-cases__content{display:flex;flex-direction:column;gap:12px;min-height:104px;padding:18px 20px;flex:1}
.eng-cases__content-top{display:flex;flex-direction:column;flex:1}
.eng-cases__name{color:#111827;font-size:16px;font-weight:800;line-height:1.35;margin:0}
.eng-cases__name,.eng-cases__summary{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.eng-cases__summary{color:#6b7280;font-size:13px;line-height:1.6;margin:8px 0 0}
.eng-cases__content-bottom{align-items:center;border-top:1px solid rgba(229,231,235,.8);display:flex;justify-content:space-between;padding-top:8px}
.eng-cases__cta{color:#374151;font-size:13px;font-weight:700;transition:color .3s ease}
.eng-cases__card:hover .eng-cases__cta{color:var(--home-primary)}
.eng-cases__arrow{color:var(--home-primary);font-family:monospace;font-size:18px;font-weight:400;opacity:0;transform:translate(-10px);transition:all .3s ease}
.eng-cases__card:hover .eng-cases__arrow{opacity:1;transform:translate(0)}
/* ============================ 行业动态 ============================ */
.news{background:#f5f6f8;padding:80px 0}
.news__title-wrap{align-items:center;display:flex;flex-direction:column;gap:10px;justify-content:center;margin-bottom:60px;text-align:center}
.news__title{background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--home-primary) 12%,#fff),transparent);border-radius:999px;box-shadow:0 10px 26px color-mix(in srgb,var(--home-primary) 12%,transparent);color:#111827;display:inline-flex;font-size:36px;font-weight:800;letter-spacing:.06em;margin:0;padding:8px 18px}
.news__title-accent{height:14px;position:relative;width:min(260px,66vw)}
.news__title-accent:before{background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--home-primary) 55%,#111827),transparent);border-radius:999px;content:"";height:2px;left:0;opacity:.5;position:absolute;right:0;top:50%;transform:translateY(-50%)}
.news__title-accent:after{background:var(--home-primary);border-radius:999px;box-shadow:0 0 0 7px color-mix(in srgb,var(--home-primary) 18%,transparent);content:"";height:10px;left:50%;position:absolute;top:50%;transform:translate(-50%,-50%);width:10px}
.news__cols{align-items:stretch;display:grid;gap:40px;grid-template-columns:repeat(2,minmax(0,1fr))}
.news__col{background:#fff;border:1px solid rgba(229,231,235,.5);border-radius:16px;box-shadow:0 4px 20px -10px rgba(0,0,0,.05);box-sizing:border-box;display:flex;flex-direction:column;height:100%;padding:32px;min-width:0}
.news__col-head{align-items:center;border-bottom:1px solid #f3f4f6;display:flex;flex-shrink:0;justify-content:space-between;margin-bottom:4px;padding-bottom:16px}
.news__col-head-left{align-items:center;display:flex;gap:12px;min-width:0}
.news__deco{background:var(--home-primary);border-radius:3px;flex-shrink:0;height:24px;width:6px}
.news__col-title{color:#1f2937;font-size:20px;font-weight:700;line-height:1.35;margin:0}
.news__more{align-items:center;color:#6b7280;display:inline-flex;flex-shrink:0;font-size:14px;font-weight:500;gap:6px;text-decoration:none;transition:color .2s ease}
.news__more:hover{color:var(--home-primary)}
.news__more-text{line-height:1}
.news__more-icon{align-items:center;background:#f3f4f6;border-radius:50%;color:#9ca3af;display:inline-flex;height:20px;justify-content:center;transition:all .2s ease;width:20px}
.news__more:hover .news__more-icon{background:var(--home-primary);color:#fff;transform:translate(4px)}
.news__more-svg{display:block;height:10px;width:10px}
.news__col ul.yb-newslist{display:flex;flex:1;flex-direction:column;margin:0;padding:0;min-height:0}
.news__item{align-items:center;border-bottom:1px dashed #e5e7eb;display:flex;font-size:15px;gap:16px;justify-content:space-between;line-height:1.5;padding:16px 0;transition:background .2s ease}
.news__item:last-child{border-bottom:0;padding-bottom:0}
.news__link{align-items:center;color:#374151;display:flex;flex:1;gap:12px;min-width:0;text-decoration:none}
.news__bullet{color:var(--home-primary);flex-shrink:0;font-size:18px;line-height:1;opacity:.8;transition:transform .2s ease}
.news__link:hover{color:var(--home-primary)}
.news__item:hover .news__bullet{opacity:1;transform:translate(4px)}
.news__item-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.news__date{color:#9ca3af;flex-shrink:0;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:14px}
/* ============================ 页脚 ============================ */
.app-footer{box-sizing:border-box;width:100%;background-color:var(--footer-bg,#2563eb);color:var(--footer-fg,#fff)}
.footer-inner{margin:0 auto;max-width:1200px;padding:60px 20px 40px;box-sizing:border-box}
.footer-top{display:flex;flex-wrap:wrap;gap:60px;justify-content:space-between;margin-bottom:40px}
.footer-col{display:flex;flex-direction:column;min-width:0}
.footer-col--brand{flex:0 0 320px}
.footer-col--nav{flex:1;min-width:160px}
.footer-brand{align-items:center;display:flex;gap:14px;margin-bottom:24px}
.footer-brand__mark{background:rgba(255,255,255,.1);border-radius:8px;flex-shrink:0;height:56px;padding:4px;width:56px;box-sizing:border-box}
.footer-brand__logo-img{display:block;height:100%;object-fit:contain;width:100%}
.footer-name__main{color:var(--footer-fg);font-size:22px;font-weight:700;letter-spacing:.02em;line-height:1.25}
.footer-name__sub{color:var(--footer-fg);font-size:12px;letter-spacing:.06em;margin-top:6px;opacity:.7;text-transform:uppercase}
.footer-contact{color:var(--footer-fg);font-size:14px;line-height:1.8;opacity:.85}
.footer-contact p,address,em{font-style:normal}
.footer-contact p{margin:0 0 8px}
.footer-label{flex-shrink:0;opacity:.9}
.footer-tel{color:inherit;font-weight:600;text-decoration:none;transition:opacity .3s}
.footer-tel:hover{opacity:1;text-decoration:underline;text-underline-offset:3px}
.footer-col-title{color:var(--footer-fg);font-size:18px;font-weight:600;margin:0 0 24px;opacity:.9}
.footer-nav-grid .yb-nav{display:grid;gap:16px 24px;grid-template-columns:repeat(2,1fr);margin:0;padding:0;list-style:none}
.footer-nav-grid .yb-nav>li{list-style:none}
.footer-nav-grid .yb-nav a{color:var(--footer-fg);display:inline-block;font-size:14px;opacity:.78;text-decoration:none;transition:opacity .3s,transform .3s}
.footer-nav-grid .yb-nav a:hover{opacity:1;transform:translate(4px)}
.footer-nav-grid .yb-nav__sub{display:none}
.footer-links{align-items:center;display:flex;flex-wrap:wrap;gap:8px 14px;color:var(--footer-fg);font-size:13px;margin:0;opacity:.78}
.footer-links__label{flex-shrink:0;opacity:.9}
.footer-links__list{display:flex;flex-wrap:wrap;gap:6px 18px;list-style:none;margin:0;padding:0}
.footer-links__list:empty{display:none}
.footer-links:has(.footer-links__list:empty){display:none}
.footer-links__list a{color:var(--footer-fg);text-decoration:none;transition:opacity .3s}
.footer-links__list a:hover{text-decoration:underline;text-underline-offset:3px}
.footer-divider{border:0;border-top:1px solid rgba(255,255,255,.15);height:0;margin:32px 0}
.footer-bottom{color:var(--footer-fg);font-size:13px;opacity:.62;text-align:center}
.footer-copyright{align-items:center;display:flex;flex-wrap:wrap;gap:8px 12px;justify-content:center;margin:0}
.footer-icp{color:inherit;text-decoration:none}
.footer-icp:hover{text-decoration:underline;text-underline-offset:3px}
/* ============================ 移动端导航开关 ============================ */
/* 开关是视觉隐藏的原生 checkbox（保持可聚焦）；移动端由它 + :checked 兄弟选择器展开导航抽屉，
   汉堡按钮 PC 端不渲染 —— 桌面顶栏 / 品牌行 / 主导航结构与样式完全不变 */
.site-header__nav-switch{clip:rect(0 0 0 0);clip-path:inset(50%);height:1px;overflow:hidden;position:absolute;white-space:nowrap;width:1px}
.site-header__nav-toggle{display:none}
/* ============================ 响应式 ============================ */
@media(max-width:992px){
  .product-show__grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .eng-cases__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:768px){
  .container{padding:0 15px}
  /* 顶栏整体收起，热线改紧凑保留在品牌行（一键拨号入口不丢） */
  .site-header__top{display:none}
  .site-header__brand-inner{flex-wrap:nowrap;gap:10px;padding:10px 14px}
  .site-header__logo{flex:0 1 auto;min-width:0}
  .site-header__logo-mark{flex-shrink:1;height:40px;max-width:120px;min-width:0}
  .site-header__logo-img{height:40px}
  .site-header__logo-text{font-size:17px;letter-spacing:.02em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .site-header__hotline{gap:8px}
  .site-header__hotline-icon{height:34px;padding:7px;width:34px}
  .site-header__hotline-label{display:none}
  .site-header__hotline-num{font-size:17px}
  /* 汉堡按钮：三横条，展开时变关闭叉号 */
  .site-header__nav-toggle{align-items:center;cursor:pointer;display:flex;flex-direction:column;flex-shrink:0;gap:5px;height:40px;justify-content:center;width:40px}
  .site-header__nav-toggle-bar{background:var(--header-primary);border-radius:2px;display:block;height:2px;transition:transform .25s ease,opacity .2s ease;width:22px}
  .site-header__nav-switch:checked~.site-header__brand .site-header__nav-toggle-bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .site-header__nav-switch:checked~.site-header__brand .site-header__nav-toggle-bar:nth-child(2){opacity:0}
  .site-header__nav-switch:checked~.site-header__brand .site-header__nav-toggle-bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .site-header__nav-switch:focus-visible~.site-header__brand .site-header__nav-toggle{border-radius:8px;outline:2px solid var(--header-primary);outline-offset:2px}
  /* 主导航：默认收起，勾选后展开为纵向抽屉；二级菜单同屏展开，入口不再丢失 */
  .site-header__nav{box-shadow:0 10px 24px rgba(0,0,0,.16);display:none;max-height:calc(100vh - 118px);overflow-y:auto}
  .site-header__nav-switch:checked~.site-header__nav{display:block}
  .site-header__nav-inner{flex-direction:column;flex-wrap:nowrap;gap:0;padding:0}
  .site-header__nav-home,.site-header__nav-inner .yb-nav>li>a{border-bottom:1px solid rgba(255,255,255,.14);border-radius:0;font-size:15px;margin-top:0;opacity:1;padding:14px 16px;text-align:left;white-space:normal}
  .site-header__nav-inner .yb-nav{flex-direction:column;gap:0;width:100%}
  .site-header__nav-inner .yb-nav>li{width:100%}
  .site-header__nav-inner .yb-nav__sub{background:transparent;border:0;border-radius:0;box-shadow:none;display:block;margin:0;min-width:0;padding:0;position:static}
  .site-header__nav-inner .yb-nav__sub li{border-bottom:1px solid rgba(255,255,255,.1);margin:0}
  .site-header__nav-inner .yb-nav__sub a{border-radius:0;color:var(--header-on-primary);font-size:14px;opacity:.86;padding:12px 16px 12px 34px}
  .site-header__nav-inner .yb-nav__sub a:hover{background:rgba(255,255,255,.12);color:var(--header-on-primary);opacity:1}
  /* 首屏：容器高度改为随图片自身比例撑开 —— 宽度完整 + 高度贴合，不再上下留白；
     用 grid 把多张 slide 叠在同一格（淡入淡出过渡保留），行高即图片等比高度
     （同一轮播位请投放同尺寸图；超高竖图仍以 72vh 兜底限高，避免首屏占满整屏） */
  .maxBanner{aspect-ratio:auto;background:linear-gradient(135deg,#1e40af,#2563eb);max-height:none;min-height:auto}
  .slide-track{display:grid;inset:auto;position:relative}
  .slide-track>.slide-content{grid-area:1/1;inset:auto;position:relative}
  .slide-img{height:auto;max-height:72vh;object-fit:contain;width:100%}
  .banner-nav{height:38px;width:38px}
  .banner-nav svg{height:17px;width:17px}
  .banner-nav--prev{left:10px}
  .banner-nav--next{right:10px}
  .banner-switch{bottom:10px;right:10px}
  .product-show{padding:44px 0}
  .product-show__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .product-show__home-name{font-size:13px;padding:10px 8px}
  .product-show__title-wrap,.news__title-wrap{margin-bottom:34px}
  .product-show__title{font-size:26px}
  .product-show__title-accent,.news__title-accent{width:min(220px,70vw)}
  .choose-us{padding:56px 0}
  .choose-us__title{font-size:28px;padding:8px 16px}
  .choose-us__title-accent{width:min(220px,70vw)}
  .choose-us__title-wrap{margin-bottom:30px}
  .choose-us__row,.choose-us__row--reverse{direction:ltr;gap:24px;grid-template-columns:1fr;padding:24px}
  .choose-us__media{order:-1}
  .choose-us__text{gap:12px;padding:0}
  .choose-us__text:before{display:none}
  .choose-us__desc{border-radius:12px;padding:12px}
  .eng-cases{padding:52px 0 58px}
  .eng-cases__inner{padding:0 14px}
  .eng-cases__head{gap:8px;margin-bottom:32px}
  .eng-cases__title{font-size:24px;padding:6px 14px}
  .eng-cases__title-accent{height:12px;width:min(220px,72vw)}
  .eng-cases__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .eng-cases__content{gap:10px;min-height:96px;padding:16px}
  .eng-cases__name{font-size:15px}
  .eng-cases__summary{font-size:12px;margin-top:6px}
  .news{padding:56px 0}
  .news__title{font-size:28px;padding:8px 16px}
  .news__cols{gap:24px;grid-template-columns:minmax(0,1fr)}
  .news__col{border-radius:12px;padding:20px}
  .news__col-head{margin-bottom:2px;padding-bottom:12px}
  .news__col-title{font-size:18px}
  .news__item{font-size:14px;gap:12px;padding:12px 0}
  .news__date{font-size:13px}
  .pc-only{display:none!important}
  .wap-only{display:inline-flex!important}
  .footer-inner{padding:26px 14px 20px}
  .footer-top{flex-direction:column;gap:40px}
  .footer-col--brand{flex:auto}
  .footer-bottom{font-size:12px;opacity:.75}
}

/* ============================ 返回顶部 ============================ */
/* 固定右侧，滚动超过一屏由脚本加 is-show 淡入；主题色跟随 --pd-primary */
.yb-gotop{align-items:center;background:var(--pd-primary,#2563eb);border:0;border-radius:50%;bottom:32px;box-shadow:0 8px 20px rgba(37,99,235,.28);color:#fff;cursor:pointer;display:flex;height:46px;justify-content:center;opacity:0;pointer-events:none;position:fixed;right:24px;transform:translateY(10px);transition:opacity .25s ease,transform .25s ease,background .25s ease;width:46px;z-index:90}
.yb-gotop.is-show{opacity:1;pointer-events:auto;transform:translateY(0)}
.yb-gotop:hover{background:var(--pd-primary-deep,#1e40af)}
.yb-gotop:focus-visible{outline:2px solid rgba(37,99,235,.45);outline-offset:2px}
.yb-gotop svg{height:20px;width:20px}
@media (max-width:768px){
  .yb-gotop{bottom:20px;height:42px;right:14px;width:42px}
}