/* ============================================================
   GEBC 智能锂电池组官方网站 - 全局样式
   设计基调：深蓝(#0d1b2a) + 品牌绿渐变(#0a8f6f → #12c2a4)
   来源：以 index-demo1.html 为基准重构
   ============================================================ */

/* ============ 1. Reset & Design Tokens ============ */
:root{
  --g-dark:#0d1b2a;
  --g-darker:#07101c;
  --g-primary:#0a8f6f;
  --g-accent:#12c2a4;
  --g-text:#1a2233;
  --g-text2:#5a6b7f;
  --g-text3:#9fb3c8;
  --g-border:#e8edf2;
  --g-bg:#f7faf8;
  --g-shadow:0 20px 44px rgba(13,27,42,.1);
  --g-radius:18px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;}
body{
  font-family:'Inter','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  color:#1a2233;background:#fff;line-height:1.65;
}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}
img{max-width:100%;display:block;}
.n_wrap{max-width:1280px;margin:0 auto;padding:0 32px;}

/* ============ 2. 顶部工具条 ============ */
.n_utility{background:#0d1b2a;color:#9fb3c8;font-size:12px;}
.n_utility-inner{
  max-width:1280px;margin:0 auto;padding:8px 32px;
  display:flex;align-items:center;justify-content:flex-end;gap:22px;
}
.n_utility a{color:#9fb3c8;transition:color .25s;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.n_utility a:hover{color:#12c2a4;}
.n_utility svg{width:13px;height:13px;flex-shrink:0;}
.n_utility-sep{width:1px;height:14px;background:#274060;}
.n_utility-iso{display:inline-flex;align-items:center;gap:6px;color:#7f94ab;}
.n_utility-iso .dot{width:6px;height:6px;border-radius:50%;background:#12c2a4;box-shadow:0 0 8px #12c2a4;}

/* ============ 3. 主导航 ============ */
.n_nav{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(13,27,42,.06);
  box-shadow:0 4px 24px rgba(13,27,42,.04);
}
.n_nav-inner{
  max-width:1280px;margin:0 auto;padding:0 32px;
  display:flex;align-items:center;justify-content:space-between;height:72px;
}
.n_logo{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.n_logo-mark{
  width:40px;height:40px;border-radius:9px;
  background:linear-gradient(135deg,#0a8f6f 0%,#12c2a4 100%);
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:19px;
  box-shadow:0 4px 14px rgba(10,143,111,.28);
}
.n_logo-text{display:flex;flex-direction:column;line-height:1.1;}
.n_logo-cn{font-size:16px;font-weight:700;color:#0d1b2a;letter-spacing:.3px;}
.n_logo-en{font-size:9.5px;color:#7d8fa3;letter-spacing:1.4px;text-transform:uppercase;margin-top:3px;}

.n_menu{display:flex;align-items:center;gap:4px;}
.n_item{position:relative;}
.n_link{
  display:inline-flex;align-items:center;gap:6px;
  padding:26px 14px;font-size:14.5px;font-weight:500;color:#33465f;
  transition:color .25s;white-space:nowrap;position:relative;
}
.n_link:hover{color:#0a8f6f;}
.n_link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:18px;height:2px;
  background:linear-gradient(90deg,#0a8f6f,#12c2a4);border-radius:2px;
  transform:scaleX(0);transform-origin:center;transition:transform .3s ease;
}
.n_item.has-drop:hover .n_link,
.n_item.has-drop:focus-within .n_link,
.n_item.active .n_link{color:#0a8f6f;}
.n_item.has-drop:hover .n_link::after,
.n_item.has-drop:focus-within .n_link::after,
.n_item.active .n_link::after{transform:scaleX(1);}
.n_caret{width:10px;height:10px;transition:transform .3s ease;opacity:.6;}
.n_item.has-drop:hover .n_caret,
.n_item.has-drop:focus-within .n_caret{transform:rotate(180deg);opacity:1;}

.n_cta-group{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.n_btn{
  display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:8px;
  font-size:13px;font-weight:600;transition:all .25s;border:1px solid transparent;cursor:pointer;white-space:nowrap;
}
.n_btn-ghost{color:#33465f;border-color:rgba(13,27,42,.14);background:transparent;}
.n_btn-ghost:hover{color:#0a8f6f;border-color:#0a8f6f;background:rgba(10,143,111,.04);}
/* ============ 4. 产品中心下拉（三维 mega 菜单） ============ */
.n_drop{
  position:absolute;top:100%;left:50%;transform:translate(-50%,8px);
  width:900px;background:#fff;border-radius:18px;
  box-shadow:0 24px 60px rgba(13,27,42,.14),0 2px 8px rgba(13,27,42,.06);
  border:1px solid rgba(13,27,42,.05);padding:28px 32px;
  opacity:0;visibility:hidden;transition:all .28s cubic-bezier(.2,.7,.3,1);z-index:200;
}
.n_drop-sm{width:300px;padding:22px 24px;left:0;transform:translate(0,8px);}
.n_item.has-drop:hover .n_drop-sm,
.n_item.has-drop:focus-within .n_drop-sm{transform:translate(0,0);}
.n_drop-sm::before{left:28px;transform:translateX(0) rotate(45deg);}
/* 产品中心双入口下拉（按产品类型 + 按应用场景） */
.n_drop-cat{width:760px;padding:24px 28px;left:0;transform:translate(0,8px);}
.n_item.has-drop:hover .n_drop-cat,
.n_item.has-drop:focus-within .n_drop-cat{transform:translate(0,0);}
.n_drop-cat::before{left:32px;transform:translateX(0) rotate(45deg);}
.n_drop-cat .n_drop-cols{grid-template-columns:1.35fr 1fr;gap:32px;}
/* 产品类型列表：一级名 + 二级标签 */
.n_cat-list{display:flex;flex-direction:column;gap:11px;}
.n_cat-item{border-bottom:1px solid #f0f4f7;padding-bottom:10px;}
.n_cat-item:last-child{border-bottom:none;padding-bottom:0;}
.n_cat-name{font-size:14px;font-weight:700;color:#0d1b2a;display:inline-flex;align-items:center;gap:6px;transition:color .2s;}
.n_cat-name:hover{color:#0a8f6f;}
.n_cat-name::after{content:"›";color:#12c2a4;font-weight:800;}
.n_cat-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px;}
.n_cat-tags a{font-size:11.5px;color:#5a6b7f;background:#f4f8f6;border:1px solid #e8edf2;border-radius:14px;padding:2px 9px;transition:all .2s;}
.n_cat-tags a:hover{color:#0a8f6f;border-color:#0a8f6f;}
.n_cat-pending{font-size:11.5px;color:#9aa8b8;}

.n_drop::before{
  content:"";position:absolute;top:-7px;left:50%;transform:translateX(-50%) rotate(45deg);
  width:14px;height:14px;background:#fff;border-top:1px solid rgba(13,27,42,.05);border-left:1px solid rgba(13,27,42,.05);
}
.n_item.has-drop:hover .n_drop,
.n_item.has-drop:focus-within .n_drop{opacity:1;visibility:visible;transform:translate(-50%,0);}
.n_drop-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;padding-bottom:14px;border-bottom:1px solid #eef2f6;}
.n_drop-title{font-size:15px;font-weight:700;color:#0d1b2a;}
.n_drop-title small{display:block;font-size:10px;font-weight:500;color:#9aa8b8;letter-spacing:1.4px;text-transform:uppercase;margin-top:3px;}
.n_drop-link{font-size:12.5px;color:#0a8f6f;font-weight:600;display:inline-flex;align-items:center;gap:4px;}
.n_drop-link:hover{color:#087a5f;}
.n_drop-link svg{width:12px;height:12px;}
.n_drop-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;}
.n_col-title{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:#0a8f6f;margin-bottom:12px;padding-bottom:8px;border-bottom:1px dashed #e2e9ef;}
.n_col-dot{width:7px;height:7px;border-radius:50%;background:linear-gradient(135deg,#0a8f6f,#12c2a4);}
.n_tree{position:relative;padding-left:12px;}
.n_tree::before{content:"";position:absolute;left:2px;top:4px;bottom:4px;width:2px;background:linear-gradient(180deg,#e2e9ef,#f6f8fa);border-radius:2px;}
.n_tree-group{position:relative;margin-bottom:10px;}
.n_tree-group::before{content:"";position:absolute;left:-10px;top:9px;width:8px;height:2px;background:#d5dfe8;border-radius:2px;}
.n_tree-group > .n_tree-label{font-size:12.5px;font-weight:600;color:#27384d;padding:2px 0;display:block;}
.n_tree-children{padding-left:12px;position:relative;}
.n_tree-children::before{content:"";position:absolute;left:3px;top:2px;bottom:2px;width:1px;background:#ecedf1;}
.n_tree-children li{position:relative;}
.n_tree-children li::before{content:"";position:absolute;left:-9px;top:11px;width:6px;height:1px;background:#e0e6ec;}
.n_tree-children a{display:block;font-size:12.5px;color:#5a6b7f;padding:3px 0;transition:all .2s;position:relative;}
.n_tree-children a:hover{color:#0a8f6f;transform:translateX(2px);}
.n_tree-children a.is-current{color:#0a8f6f;font-weight:600;}
.n_tree-children a.is-current::after{content:"●";position:absolute;right:0;font-size:8px;color:#12c2a4;}
.n_tree-leaf > a{font-size:12.5px;color:#5a6b7f;padding:3px 0;display:block;transition:all .2s;}
.n_tree-leaf > a:hover{color:#0a8f6f;transform:translateX(2px);}

/* ============ 5. Hero ============ */
.n_hero{position:relative;overflow:hidden;color:#fff;background:#07101c;}
.n_hero-bg{position:absolute;inset:0;background:radial-gradient(120% 90% at 80% 10%,rgba(18,194,164,.28) 0%,rgba(10,143,111,.14) 28%,rgba(7,16,28,0) 60%),linear-gradient(135deg,#07101c 0%,#0d1f33 55%,#0a3a2f 100%);}
.n_hero-grid{position:absolute;inset:0;opacity:.16;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:46px 46px;mask-image:radial-gradient(ellipse at 75% 50%,#000 35%,transparent 75%);}
.n_hero-inner{max-width:1280px;margin:0 auto;padding:88px 32px 96px;position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;}
.n_hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:#12c2a4;margin-bottom:18px;}
.n_hero-eyebrow .bar{width:28px;height:2px;background:#12c2a4;border-radius:2px;}
.n_hero h1{font-size:46px;line-height:1.15;font-weight:800;letter-spacing:.3px;}
.n_hero h1 span{background:linear-gradient(90deg,#12c2a4,#7be3c9);-webkit-background-clip:text;background-clip:text;color:transparent;}
.n_hero-sub{margin-top:20px;font-size:16px;color:#c7d4e2;max-width:520px;}
.n_hero-stats{display:flex;gap:34px;margin-top:34px;}
.n_hero-stat .num{font-size:28px;font-weight:800;color:#fff;}
.n_hero-stat .num small{font-size:15px;color:#12c2a4;font-weight:700;}
.n_hero-stat .lbl{font-size:12px;color:#9fb3c8;margin-top:2px;}
.n_hero-cta{display:flex;gap:12px;margin-top:36px;}
.n_hero-cta .n_btn{font-size:14px;padding:12px 22px;border-radius:10px;}
.n_hero-cta .n_btn-ghost{color:#fff;border-color:rgba(255,255,255,.35);}
.n_hero-cta .n_btn-ghost:hover{color:#12c2a4;border-color:#12c2a4;background:rgba(18,194,164,.08);}
.n_hero-visual{position:relative;}
.n_hero-visual img{width:100%;border-radius:22px;box-shadow:0 30px 80px rgba(0,0,0,.45);border:1px solid rgba(255,255,255,.08);}
.n_hero-badge{position:absolute;right:10px;bottom:10px;background:rgba(13,27,42,.86);backdrop-filter:blur(8px);border:1px solid rgba(18,194,164,.35);border-radius:14px;padding:12px 16px;color:#fff;}
.n_hero-badge b{display:block;font-size:13px;color:#12c2a4;font-weight:700;}
.n_hero-badge span{font-size:11px;color:#c7d4e2;}

/* ============ 6. 信任栏 ============ */
.n_trust{background:#f4f8f6;border-bottom:1px solid #e8efea;}
.n_trust-inner{max-width:1280px;margin:0 auto;padding:18px 32px;display:flex;align-items:center;gap:22px;flex-wrap:wrap;justify-content:center;}
.n_trust-lbl{font-size:12px;font-weight:700;color:#7d8fa3;letter-spacing:1.4px;text-transform:uppercase;}
.n_trust-chips{display:flex;gap:10px;flex-wrap:wrap;}
.n_trust-chip{font-size:12.5px;font-weight:600;color:#274d3f;background:#fff;border:1px solid #dbe8e1;border-radius:20px;padding:6px 14px;transition:all .2s;}
.n_trust-chip:hover{color:#0a8f6f;border-color:#0a8f6f;transform:translateY(-1px);}

/* ============ 7. 区块基础 ============ */
.n_section{padding:84px 0;}
.n_section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.n_section-eyebrow{font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:#0a8f6f;}
.n_section-title{font-size:30px;font-weight:800;color:#0d1b2a;margin-top:6px;letter-spacing:.2px;}
.n_section-desc{font-size:14.5px;color:#6b7c8f;max-width:560px;margin-top:8px;}
/* ============ 8. 产品卡片 ============ */
.n_pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.n_pcard{position:relative;background:#fff;border:1px solid #e8edf2;border-radius:18px;overflow:hidden;transition:all .3s;display:flex;flex-direction:column;}
.n_pcard:hover{transform:translateY(-6px);box-shadow:0 20px 44px rgba(13,27,42,.1);border-color:#d5e6df;}
.n_pcard-flag{position:absolute;top:14px;left:14px;font-size:10.5px;font-weight:700;letter-spacing:.5px;color:#fff;background:linear-gradient(135deg,#0a8f6f,#12c2a4);border-radius:20px;padding:4px 11px;z-index:2;box-shadow:0 4px 12px rgba(10,143,111,.3);}
.n_pcard-img{aspect-ratio:4/3;background:#f4f8f6;display:flex;align-items:center;justify-content:center;overflow:hidden;}
.n_pcard-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s;}
.n_pcard:hover .n_pcard-img img{transform:scale(1.04);}
.n_pcard-body{padding:18px 18px 20px;flex:1;display:flex;flex-direction:column;}
.n_pcard-cat{font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#9aa8b8;}
.n_pcard h3{font-size:17px;font-weight:700;color:#0d1b2a;margin:4px 0 8px;}
.n_pcard p{font-size:12.5px;color:#6b7c8f;flex:1;}
.n_pcard-models{font-size:11.5px;color:#33465f;background:#f4f8f6;border-radius:8px;padding:7px 10px;margin-top:12px;font-family:'Roboto Mono',ui-monospace,monospace;}
.n_pcard-link{margin-top:14px;font-size:12.5px;font-weight:600;color:#0a8f6f;display:inline-flex;align-items:center;gap:4px;}
.n_pcard-link:hover{color:#087a5f;}

/* ============ 9. 关于我们 ============ */
.n_about{background:#f7faf8;}
.n_about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.n_about-img{border-radius:22px;overflow:hidden;box-shadow:0 24px 60px rgba(13,27,42,.12);}
.n_about-img img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.n_about h2{font-size:30px;font-weight:800;color:#0d1b2a;}
.n_about h2 span{color:#0a8f6f;}
.n_about p{font-size:14.5px;color:#5a6b7f;margin-top:16px;}
.n_about-certs{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px;}
.n_about-cert{font-size:11.5px;font-weight:600;color:#274d3f;background:#fff;border:1px solid #dbe8e1;border-radius:8px;padding:6px 11px;}
.n_about-stats{display:flex;gap:34px;margin-top:26px;padding-top:22px;border-top:1px solid #e2e9ef;}
.n_about-stat .n{font-size:24px;font-weight:800;color:#0a8f6f;}
.n_about-stat .l{font-size:12px;color:#7d8fa3;margin-top:2px;}

/* ============ 10. 应用领域 ============ */
.n_agrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align: center;}
.n_acard{position:relative;background:#fff;border:1px solid #e8edf2;border-radius:16px;padding:24px 20px;transition:all .3s;overflow:hidden;}
.n_acard::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,#0a8f6f,#12c2a4);opacity:0;transition:opacity .3s;}
.n_acard:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(13,27,42,.09);border-color:#d5e6df;}
.n_acard:hover::before{opacity:1;}
.n_acard-ico{width:96px;height:96px;border-radius:11px;background:#0D3C3C;display:flex;align-items:center;justify-content:center;font-size:42px;margin:auto auto 14px auto;overflow:hidden;}.n_acard-ico img{width:100%;height:100%;object-fit:contain;padding:6px;}
.n_acard h3{font-size:16px;font-weight:700;color:#0d1b2a;}
.n_acard p{font-size:12.5px;color:#6b7c8f;margin-top:6px;}

/* ============ 11. Why GEBC ============ */
.n_why{background:#0d1b2a;color:#fff;}
.n_why .n_section-title{color:#fff;}
.n_why .n_section-eyebrow{color:#12c2a4;}
.n_why .n_section-desc{color:#9fb3c8;}
.n_wgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.n_wcard{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:18px;padding:30px 26px;transition:all .3s;}
.n_wcard:hover{background:rgba(18,194,164,.08);border-color:rgba(18,194,164,.3);transform:translateY(-4px);}
.n_wcard-ico{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,#0a8f6f,#12c2a4);display:flex;align-items:center;justify-content:center;font-size:21px;margin-bottom:16px;}
.n_wcard h3{font-size:17px;font-weight:700;}
/* ============ 12. 新闻 ============ */
.n_ngrid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.n_ncard{background:#fff;border:1px solid #e8edf2;border-radius:16px;overflow:hidden;transition:all .3s;display:flex;flex-direction:column;}
.n_ncard:hover{transform:translateY(-5px);box-shadow:0 18px 40px rgba(13,27,42,.09);}
.n_ncard-img{aspect-ratio:16/10;background:#f4f8f6;overflow:hidden;}
.n_ncard-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s;}
.n_ncard:hover .n_ncard-img img{transform:scale(1.04);}
.n_ncard-body{padding:18px 20px 20px;flex:1;display:flex;flex-direction:column;}
.n_ncard-date{font-size:11.5px;color:#9aa8b8;font-weight:600;}
.n_ncard h3{font-size:15.5px;font-weight:700;color:#0d1b2a;margin:6px 0 8px;line-height:1.45;}
.n_ncard p{font-size:12.5px;color:#6b7c8f;flex:1;}
.n_ncard-link{margin-top:12px;font-size:12.5px;font-weight:600;color:#0a8f6f;}
.n_ncard-link:hover{color:#087a5f;}

/* ============ 13. CTA ============ */
.n_cta{background:linear-gradient(135deg,#0a8f6f,#0d7a8f);color:#fff;text-align:center;padding:64px 32px;border-radius:24px;margin:0 32px;}
.n_cta h2{font-size:26px;font-weight:800;}
.n_cta p{font-size:14.5px;color:#d8f0e8;margin-top:10px;}
.n_cta-btns{display:flex;gap:12px;justify-content:center;margin-top:24px;}
.n_cta-btns .n_btn{font-size:14px;padding:12px 24px;border-radius:10px;}
.n_cta-btns .n_btn-ghost{color:#fff;border-color:rgba(255,255,255,.45);}
.n_cta-btns .n_btn-ghost:hover{color:#0a8f6f;border-color:#fff;background:#fff;}

/* ============ 14. 页脚 ============ */
.n_footer{background:#07101c;color:#9fb3c8;padding:56px 0 24px;margin-top:64px;}
.n_footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.n_footer-brand .n_logo-mark{box-shadow:0 4px 14px rgba(18,194,164,.35);}
.n_footer-brand .n_logo-cn{color:#fff;}
.n_footer p{font-size:12.5px;margin-top:14px;color:#7f94ab;max-width:340px;}
.n_footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;}
.n_footer-col ul li{margin-bottom:8px;}
.n_footer-col a{font-size:13px;color:#9fb3c8;transition:color .2s;}
.n_footer-col a:hover{color:#12c2a4;}
.n_footer-contact li{font-size:12.5px;color:#9fb3c8;margin-bottom:9px;display:flex;align-items:flex-start;gap:8px;}
.n_footer-contact svg{width:14px;height:14px;flex-shrink:0;margin-top:2px;color:#12c2a4;}
/* ============ 15. 内页页面标题区 ============ */
.n-page-hero{background:#0d1b2a;color:#fff;padding:52px 0 46px;position:relative;overflow:hidden;}
.n-page-hero::after{content:"";position:absolute;inset:0;background:radial-gradient(60% 100% at 85% 0%,rgba(18,194,164,.18),transparent 60%);}
.n-page-hero .n_wrap{position:relative;z-index:2;}
.n-page-hero h1{font-size:32px;font-weight:800;letter-spacing:.3px;}
.n-page-hero h1 small{display:block;font-size:11px;font-weight:600;color:#12c2a4;letter-spacing:2px;text-transform:uppercase;margin-top:8px;}
.n-page-hero .n-crumb{display:flex;align-items:center;gap:8px;font-size:12.5px;color:#9fb3c8;margin-top:14px;}
.n-page-hero .n-crumb a{color:#9fb3c8;transition:color .2s;}
.n-page-hero .n-crumb a:hover{color:#12c2a4;}
.n-page-hero .n-crumb .sep{color:#42597a;}

/* ============ 16. 内页主体布局 ============ */
.n-page{max-width:1280px;margin:0 auto;padding:52px 32px 72px;display:grid;grid-template-columns:280px 1fr;gap:44px;align-items:start;}
.n-page-single{max-width:1280px;margin:0 auto;padding:52px 32px 72px;}
.n-sidebar{position:sticky;top:96px;}

/* ---- 侧边栏分类树 ---- */
.n-sbox{background:#fff;border:1px solid #e8edf2;border-radius:16px;overflow:hidden;margin-bottom:20px;}
.n-sbox-head{background:#0d1b2a;color:#fff;padding:16px 20px;display:flex;align-items:center;gap:10px;}
.n-sbox-head h3{font-size:15px;font-weight:700;flex:1;}
.n-sbox-head small{font-size:10px;color:#7f94ab;letter-spacing:1.4px;text-transform:uppercase;}
.n-sbox ul{padding:10px 0;}
.n-sbox li a{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;font-size:13.5px;color:#4a5c72;transition:all .2s;border-left:3px solid transparent;}
.n-sbox li a:hover{color:#0a8f6f;background:#f4f8f6;border-left-color:#0a8f6f;}
.n-sbox li.active > a{color:#0a8f6f;font-weight:600;background:#f4f8f6;border-left-color:#0a8f6f;}
.n-sbox .sub{padding:0 0 6px;}
.n-sbox .sub a{padding-left:38px;font-size:12.5px;color:#7d8fa3;}
.n-sbox .sub .sub a{padding-left:56px;font-size:12px;color:#9aa8b8;}
.n-sbox .sub li.active > a{color:#0a8f6f;font-weight:600;}
.n-sbox .sub .sub li.active > a{color:#0a8f6f;font-weight:600;}

/* ---- 侧边栏联系卡片 ---- */
.n-scontact{background:linear-gradient(135deg,#0d1b2a,#0a3a2f);color:#fff;border-radius:16px;padding:24px 22px;}
.n-scontact h4{font-size:15px;font-weight:700;margin-bottom:6px;}
.n-scontact p{font-size:12px;color:#9fb3c8;margin-bottom:16px;}
.n-scontact li{font-size:12.5px;color:#c7d4e2;margin-bottom:10px;display:flex;align-items:flex-start;gap:8px;}
.n-scontact li b{color:#12c2a4;font-weight:600;}
.n-scontact .n_btn{width:100%;justify-content:center;}

/* ============ 17. 分页 ============ */
.n-pagination{display:flex;gap:8px;justify-content:center;margin-top:36px;flex-wrap:wrap;}
.n-pagination a,.n-pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:38px;padding:0 12px;border-radius:9px;border:1px solid #e2e9ef;font-size:13px;color:#4a5c72;transition:all .2s;}
.n-pagination a:hover{color:#0a8f6f;border-color:#0a8f6f;}
.n-pagination .current{background:linear-gradient(135deg,#0a8f6f,#12c2a4);color:#fff;border-color:transparent;font-weight:600;}

/* ============ 18. 产品详情 ============ */
.n-pd-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;}
.n-pd-gallery .n-pd-main{border:1px solid #e8edf2;border-radius:18px;overflow:hidden;background:#f8fafb;}
.n-pd-gallery .n-pd-main img{width:100%;aspect-ratio:4/3;object-fit:contain;background:#f8fafb;}
.n-pd-thumbs{display:flex;gap:10px;margin-top:12px;}
.n-pd-thumbs a{flex:1;border:2px solid transparent;border-radius:10px;overflow:hidden;transition:all .2s;}
.n-pd-thumbs a.on{border-color:#0a8f6f;}
.n-pd-thumbs img{width:100%;aspect-ratio:1;object-fit:cover;}
.n-pd-info .n-pd-cat{font-size:11px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;color:#0a8f6f;}
.n-pd-info h1{font-size:28px;font-weight:800;color:#0d1b2a;margin:8px 0 12px;}
.n-pd-spec-label{display:inline-block;font-size:11.5px;font-weight:600;color:#274d3f;background:#eaf6f0;border:1px solid #d5e6df;border-radius:20px;padding:4px 12px;margin-bottom:14px;}
.n-pd-desc{font-size:14.5px;color:#5a6b7f;line-height:1.9;}
.n-pd-feats{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px;}
.n-pd-feat{display:flex;align-items:center;gap:8px;font-size:12.5px;color:#33465f;background:#f7faf8;border-radius:9px;padding:9px 12px;}
.n-pd-feat i{font-style:normal;color:#0a8f6f;}
.n-pd-meta{margin-top:22px;padding-top:18px;border-top:1px solid #eef2f6;font-size:12.5px;color:#7d8fa3;line-height:2;}
.n-pd-meta b{color:#33465f;}
.n-pd-cta{display:flex;gap:12px;margin-top:22px;}
.n-pd-cta .n_btn{font-size:14px;padding:12px 24px;border-radius:10px;}
.n-pd-tabs{margin-top:44px;}
.n-pd-tabs .tabs{display:flex;gap:6px;border-bottom:2px solid #eef2f6;margin-bottom:24px;}
.n-pd-tabs .tabs a{padding:10px 20px;font-size:14px;font-weight:600;color:#7d8fa3;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .2s;}
.n-pd-tabs .tabs a.on{color:#0a8f6f;border-bottom-color:#0a8f6f;}
.n-pd-content{font-size:14px;color:#4a5c72;line-height:2;}
.n-pd-content img{max-width:100%;border-radius:8px;}
.n-spec-table{width:100%;border-collapse:collapse;font-size:13.5px;}
.n-spec-table th,.n-spec-table td{border:1px solid #e8edf2;padding:11px 16px;text-align:left;}
.n-spec-table th{background:#f4f8f6;color:#33465f;font-weight:600;width:200px;}
.n-spec-table td{color:#4a5c72;}
.n-pd-nav{display:flex;justify-content:space-between;gap:16px;margin-top:28px;padding-top:20px;border-top:1px solid #eef2f6;font-size:13px;}
.n-pd-nav a{color:#0a8f6f;font-weight:600;max-width:45%;}
.n-pd-nav a:hover{color:#087a5f;}
.n-related{margin-top:56px;}

/* ============ 19. 新闻详情 ============ */
.n-article-title{font-size:26px;font-weight:800;color:#0d1b2a;line-height:1.4;}
.n-article-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:12.5px;color:#9aa8b8;margin:14px 0 24px;padding-bottom:18px;border-bottom:1px solid #eef2f6;}
.n-article-body{font-size:14.5px;color:#4a5c72;line-height:2.1;}
.n-article-body img{max-width:100%;border-radius:10px;margin:12px 0;}
/* ============ 20. 搜索 ============ */
.n-search-form{display:flex;gap:10px;margin-bottom:32px;}
.n-search-form input{flex:1;height:46px;border:1px solid #e2e9ef;border-radius:10px;padding:0 18px;font-size:14px;outline:none;transition:border .2s;}
.n-search-form input:focus{border-color:#0a8f6f;box-shadow:0 0 0 3px rgba(10,143,111,.08);}
.n-search-list li{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid #f0f4f7;}
.n-search-list li .tag{font-size:11px;font-weight:600;color:#fff;background:#0a8f6f;border-radius:6px;padding:3px 9px;flex-shrink:0;}
.n-search-list a{font-size:14.5px;color:#33465f;font-weight:600;transition:color .2s;}
.n-search-list a:hover{color:#0a8f6f;}

/* ============ 21. 表单（在线询价） ============ */
.n-form{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.n-form .full{grid-column:1/-1;}
.n-form .item{display:flex;flex-direction:column;}
.n-form label{font-size:13px;font-weight:600;color:#33465f;margin-bottom:7px;}
.n-form label i{color:#e53e3e;font-style:normal;}
.n-form input,.n-form select,.n-form textarea{height:44px;border:1px solid #e2e9ef;border-radius:9px;padding:0 14px;font-size:14px;font-family:inherit;outline:none;transition:border .2s;background:#fff;color:#33465f;}
.n-form textarea{height:110px;padding:12px 14px;resize:vertical;}
.n-form input:focus,.n-form select:focus,.n-form textarea:focus{border-color:#0a8f6f;box-shadow:0 0 0 3px rgba(10,143,111,.08);}
.n-form .n_btn{padding:12px 34px;font-size:14px;border-radius:10px;}
.n-form .n_btn[disabled]{opacity:.6;cursor:not-allowed;}
.n-form-hint{font-size:12px;color:#9aa8b8;grid-column:1/-1;}

/* ============ 22. 关于页 ============ */
.n-about-grid2{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start;}
.n-about-body{font-size:14.5px;color:#4a5c72;line-height:2.1;}
.n-cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.n-cert-card{background:#fff;border:1px solid #e8edf2;border-radius:14px;overflow:hidden;transition:all .3s;}
.n-cert-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(13,27,42,.09);}
.n-cert-card .img{aspect-ratio:4/3;background:#f4f8f6;overflow:hidden;display:flex;align-items:center;justify-content:center;}
.n-cert-card .img img{width:100%;height:100%;object-fit:contain;padding:8px;}
.n-cert-card p{font-size:12.5px;font-weight:600;color:#33465f;text-align:center;padding:12px 10px;}

/* ============ 23. 错误页 ============ */
.n-404{max-width:640px;margin:0 auto;padding:110px 32px;text-align:center;}
.n-404 .code{font-size:110px;font-weight:800;background:linear-gradient(135deg,#0a8f6f,#12c2a4);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;}
.n-404 h2{font-size:22px;color:#0d1b2a;margin:18px 0 10px;}
.n-404 p{font-size:14px;color:#7d8fa3;margin-bottom:26px;}
.n-404 .n_btn{font-size:14px;padding:12px 28px;border-radius:10px;}

/* ============ 24. 移动端菜单按钮 ============ */
.n-burger{display:none;width:40px;height:40px;border:1px solid #e2e9ef;border-radius:9px;background:#fff;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;}
.n-burger span{display:block;width:18px;height:2px;background:#33465f;position:relative;transition:all .25s;}
.n-burger span::before,.n-burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#33465f;transition:all .25s;}
.n-burger span::before{top:-6px;}
.n-burger span::after{top:6px;}
.n-burger.open span{background:transparent;}
.n-burger.open span::before{top:0;transform:rotate(45deg);}
.n-burger.open span::after{top:0;transform:rotate(-45deg);}
.n-mobile-menu{display:none;position:fixed;inset:0;background:#0d1b2a;z-index:90;padding:90px 28px 40px;overflow-y:auto;flex-direction:column;gap:6px;}
.n-mobile-menu.open{display:flex;}
.n-mobile-menu a{padding:14px 4px;font-size:17px;font-weight:600;color:#c7d4e2;border-bottom:1px solid rgba(255,255,255,.07);}
.n-mobile-menu a:hover{color:#12c2a4;}
.n-mobile-menu .sub{padding-left:18px;}
/* ============ 25. 响应式 ============ */
@media (max-width:1100px){
  .n_hero-inner{grid-template-columns:1fr;gap:40px;}
  .n_hero h1{font-size:38px;}
  .n_pgrid,.n_ngrid{grid-template-columns:repeat(2,1fr);}
  .n_about-grid{grid-template-columns:1fr;gap:34px;}
  .n_footer-grid{grid-template-columns:repeat(2,1fr);}
  .n_drop{width:760px;}
  .n_drop-cat{width:700px;}
  .n_drop-cols{grid-template-columns:repeat(2,1fr);}
  .n-page{grid-template-columns:1fr;}
  .n-sidebar{position:static;}
  .n-pd-grid{grid-template-columns:1fr;}
  .n-cert-grid{grid-template-columns:repeat(3,1fr);}
}
@media (max-width:820px){
  .n_menu{display:none;}
  .n-cta-group .n_btn-ghost{display:none;}
  .n-burger{display:flex;}
  .n_utility-inner{justify-content:center;flex-wrap:wrap;}
  .n_utility-iso{display:none;}
}
@media (max-width:640px){
  .n_utility-inner{padding:8px 16px;gap:14px;font-size:11px;}
  .n_nav-inner{padding:0 16px;height:60px;}
  .n_logo-en{display:none;}
  .n_hero-inner{padding:56px 16px 64px;}
  .n_hero h1{font-size:30px;}
  .n_hero-stats{gap:22px;}
  .n_wrap,.n_trust-inner{padding-left:16px;padding-right:16px;}
  .n_pgrid,.n_agrid,.n_ngrid,.n_wgrid{grid-template-columns:1fr;}
  .n_footer-grid{grid-template-columns:1fr;}
  .n_cta{margin:0 16px;padding:48px 20px;}
  .n_drop{width:calc(100vw - 32px);}
  .n_drop-cols{grid-template-columns:1fr;}
  .n_drop-cat .n_drop-cols{grid-template-columns:1fr;}
  .n-page{padding:36px 16px 56px;}
  .n-form{grid-template-columns:1fr;}
  .n-cert-grid{grid-template-columns:repeat(2,1fr);}
  .n-pd-feats{grid-template-columns:1fr;}
}

/* ============ 26. 辅助：滚动渐显 + 表单提示 ============ */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease;}
.reveal.in{opacity:1;transform:none;}
.n-form-hint.ok{color:#0a8f6f;font-weight:600;background:#eaf6f0;border-radius:8px;padding:10px 14px;}
.n-form-hint.err{color:#e53e3e;font-weight:600;background:#fdecec;border-radius:8px;padding:10px 14px;}
.n-form select option{color:#33465f;}









/* ============ 27. 语言切换入口 ============ */
.n_utility .n_lang{font-weight:600;}
.n_utility .n_lang.on{color:#12c2a4;}


/* ============ 29. 内页基础卡片（全站统一） ============ */
.n-card{background:#fff;border:1px solid #e8edf2;border-radius:18px;padding:28px 30px;box-shadow:0 6px 24px rgba(13,27,42,.04);}
.n-card + .n-card{margin-top:24px;}
.n-card-title{position:relative;font-size:19px;font-weight:800;color:#0d1b2a;line-height:1.45;padding-left:14px;margin-bottom:22px;}
.n-card-title::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:3px;background:linear-gradient(180deg,#0a8f6f,#12c2a4);}

/* ============ 30. 产品分类介绍（分类列表页 · Series Overview） ============ */
.n-cat-head{position:relative;background:#f7faf8;border-radius:16px;padding:24px 26px;margin-bottom:26px;overflow:hidden;}
.n-cat-head::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,#0a8f6f,#12c2a4);}
.n-cat-intro{font-size:18.5px;font-weight:800;color:#0d1b2a;line-height:1.55;letter-spacing:.2px;}
.n-cat-intro::before{content:"Series Overview";display:block;font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:#0a8f6f;margin-bottom:8px;}
.n-cat-label{display:inline-flex;align-items:center;gap:8px;font-size:11px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;color:#7d8fa3;}
.n-cat-label::before{content:"";width:7px;height:7px;border-radius:50%;background:linear-gradient(135deg,#0a8f6f,#12c2a4);flex-shrink:0;}
.n-cat-scenes{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:18px;}
.n-cat-scenes .n_trust-chip{background:#fff;border-color:#d5e6df;font-size:12px;padding:6px 15px;}
.n-cat-scenes .n_trust-chip:hover{background:#0a8f6f;color:#fff;border-color:#0a8f6f;}
.n-cat-feats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:20px;}
.n-cat-feats .n-pd-feat{background:#fff;border:1px solid #e8edf2;border-radius:12px;padding:12px 14px;font-size:13px;line-height:1.55;color:#33465f;align-items:flex-start;gap:10px;transition:all .25s;}
.n-cat-feats .n-pd-feat:hover{border-color:#d5e6df;box-shadow:0 10px 22px rgba(13,27,42,.06);transform:translateY(-2px);}
.n-cat-feats .n-pd-feat i{width:20px;height:20px;flex:0 0 20px;border-radius:6px;background:linear-gradient(135deg,#0a8f6f,#12c2a4);color:#fff;font-size:12px;display:flex;align-items:center;justify-content:center;margin-top:1px;}
.n-cat-desc{font-size:14px;color:#5a6b7f;line-height:1.9;margin-top:20px;padding-top:18px;border-top:1px solid #e4ebe6;}
.n-cat-models{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;}
.n-cat-model{font-size:11.5px;color:#33465f;background:#fff;border:1px solid #dbe8e1;border-radius:8px;padding:5px 11px;font-family:Roboto Mono,ui-monospace,monospace;}

/* 响应式 */
@media (max-width:1100px){.n-cat-feats{grid-template-columns:1fr;}}
@media (max-width:640px){
  .n-card{padding:20px 18px;border-radius:16px;}
  .n-card-title{font-size:17px;margin-bottom:18px;}
  .n-cat-head{padding:20px;border-radius:14px;}
  .n-cat-intro{font-size:16px;}
  .n-cat-feats{margin-top:16px;}
  .n-cat-feats .n-pd-feat{font-size:12.5px;padding:11px 12px;}
}