/* ============================================================
   Nova — 亮色科技企业风 官网主题样式
   Light · Tech · Enterprise   |   v2.0.0
   配色体系：单一蓝色主色 + 同色系中性灰，渐变只在深蓝→亮蓝之间过渡
   ============================================================ */

/* ------------------------------------------------------------
   1. 设计令牌（唯一色彩来源，改这里即可整体换肤）
   ------------------------------------------------------------ */
:root{
  /* 主色：同一色相，仅明度/饱和度递进（大面积铺色用低彩度，按钮用高彩度 --nv-cta） */
  --nv-primary:#4f6ee0;
  --nv-primary-d:#3f5ed6;
  --nv-primary-l:#7288e4;
  --nv-primary-50:#f6f8fd;
  --nv-primary-100:#eef2fc;
  --nv-primary-200:#dbe4fa;
  --nv-cta:#3b5bdb;
  --nv-cta-d:#3050c4;

  /* 辅助色：主色向青色偏移的同族色，仅用于渐变右端与描边 */
  --nv-accent:#5b7ce6;
  --nv-accent-100:#eef3fd;
  --nv-accent-d:#4a68d0;

  /* 渐变：只在小面积元素（按钮）上使用，端色控制在同色相内 */
  --nv-grad:linear-gradient(135deg,var(--nv-cta) 0%,#4a68d0 100%);
  --nv-grad-soft:linear-gradient(135deg,var(--nv-primary-50) 0%,var(--nv-accent-100) 100%);
  --nv-grad-deep:linear-gradient(118deg,#33499f 0%,#3f57b8 52%,#4d68d0 100%);
  --nv-grad-hero:linear-gradient(180deg,#ffffff 0%,#f6f9ff 58%,#eef4ff 100%);

  /* 中性色 */
  --nv-ink:#0d1b30;
  --nv-body:#4a5b73;
  --nv-muted:#7d8ba1;
  --nv-faint:#9aa8bd;
  --nv-bg:#f5f8fd;
  --nv-card:#ffffff;
  --nv-line:#e5ecf7;
  --nv-line-2:#eef3fb;

  /* 语义色 */
  --nv-success:#15a05a;
  --nv-success-bg:#e9f8f0;
  --nv-warning:#e07a12;
  --nv-warning-bg:#fff5e8;
  --nv-danger:#e0483f;
  --nv-danger-bg:#fdeeed;
  --nv-info:#5b7ce6;
  --nv-info-bg:#eff4fd;

  /* 形状与阴影 */
  --nv-shadow-sm:0 1px 2px rgba(13,27,48,.05);
  --nv-shadow:0 8px 24px rgba(13,27,48,.07);
  --nv-shadow-lg:0 16px 40px rgba(13,27,48,.10);
  --nv-shadow-primary:0 10px 24px rgba(79,110,224,.22);
  --nv-radius:14px;
  --nv-radius-lg:20px;
  --nv-radius-sm:10px;
  --nv-max:1200px;
}

/* ------------------------------------------------------------
   2. 基础
   ------------------------------------------------------------ */
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body.nova{
  margin:0;color:var(--nv-body);background:#fff;
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;
}
.nova h1,.nova h2,.nova h3,.nova h4{color:var(--nv-ink);margin:0;line-height:1.28;font-weight:700}
.nova a{text-decoration:none;transition:color .18s ease}
.nova a:not([class]){color:inherit}
.nova img{max-width:100%}
.nova p{margin:0 0 1em}
.nova ::selection{background:var(--nv-primary-200);color:var(--nv-primary-d)}
.nova :focus-visible{outline:2px solid var(--nv-primary);outline-offset:2px}
/* 内联 SVG 图标兜底：即使模板未加尺寸类，也不会被撑成整块黑色图形 */
.nova svg,svg.nv-i{fill:none;stroke:currentColor;width:1em;height:1em;vertical-align:middle}
.nova svg{stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.nv-container{max-width:var(--nv-max);margin:0 auto;padding:0 24px}
.nv-section{padding:84px 0}
.nv-section.nv-tight{padding:52px 0}
.nv-section.nv-flush-top{padding-top:0}
.nv-tac{text-align:center}
/* 标题高亮：用主色，不加渐变（渐变文字在浅底上更容易显"花"） */
.nv-grad-text{color:var(--nv-primary)}

/* ------------------------------------------------------------
   3. 顶部导航
   ------------------------------------------------------------ */
.nv-nav{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.9);
  backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--nv-line-2);transition:box-shadow .2s ease}
.nv-nav.is-stuck{box-shadow:0 6px 20px rgba(13,27,48,.06)}
.nv-nav-inner{display:flex;align-items:center;gap:20px;height:72px}
.nv-brand{display:flex;align-items:center;gap:10px;flex:0 1 auto;min-width:0;overflow:hidden}
.nv-brand img{height:34px;width:auto;max-width:190px;object-fit:contain;object-position:left center;display:block}
.nv-brand b{font-size:16.5px;color:var(--nv-ink);font-weight:700;letter-spacing:.2px;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis;min-width:0}
.nv-menu{display:flex;align-items:center;gap:2px;list-style:none;margin:0 auto;padding:0}
.nv-menu>li{position:relative}
.nv-menu>li>a{display:flex;align-items:center;gap:5px;padding:9px 15px;border-radius:var(--nv-radius-sm);
  color:var(--nv-ink);font-weight:500;font-size:15px;white-space:nowrap}
.nv-menu>li>a:hover{color:var(--nv-primary);background:var(--nv-primary-50)}
.nv-menu>li>a.nv-active{color:var(--nv-primary);background:var(--nv-primary-100);font-weight:600}
.nv-menu .caret{border:4px solid transparent;border-top-color:currentColor;margin-top:6px;opacity:.65}
/* 下拉菜单折叠时必须用 display:none 脱离文档流。
   用 opacity/visibility 隐藏不会移除布局盒子——菜单项一多，绝对定位的
   下拉内容会把文档高度撑爆（线上实测被撑到 6196px，页面底部出现大片空白）。 */
.nv-sub{position:absolute;top:calc(100% + 8px);left:50%;transform:translate(-50%,8px);min-width:196px;
  max-height:min(70vh,520px);overflow-y:auto;
  background:#fff;border:1px solid var(--nv-line);border-radius:12px;box-shadow:var(--nv-shadow-lg);
  padding:8px;list-style:none;margin:0;display:none;opacity:0;
  transition:opacity .18s ease,transform .18s ease}
.nv-menu>li:hover .nv-sub,.nv-menu>li:focus-within .nv-sub{display:block;opacity:1;transform:translate(-50%,0)}
.nv-sub a{display:block;padding:9px 12px;border-radius:8px;color:var(--nv-body);font-size:14px;white-space:nowrap}
.nv-sub a:hover{background:var(--nv-primary-50);color:var(--nv-primary)}
.nv-sub-head{font-size:12px;font-weight:700;color:var(--nv-faint);letter-spacing:1px;padding:10px 12px 4px}
.nv-nav-cta{display:flex;align-items:center;gap:8px;flex:none}
/* 注意：这里用 :not(.nv-btn) 限定，避免高优先级的 .nv-link 颜色规则
   覆盖掉注册/退出按钮的白字，导致按钮文字变成灰蓝看不清 */
.nv-nav-cta .nv-link:not(.nv-btn){color:var(--nv-ink);font-size:15px;font-weight:500;padding:8px 10px;border-radius:var(--nv-radius-sm)}
.nv-nav-cta .nv-link:not(.nv-btn):hover{color:var(--nv-primary);background:var(--nv-primary-50)}
.nv-burger{display:none;border:0;background:none;width:42px;height:42px;border-radius:var(--nv-radius-sm);cursor:pointer;padding:0}
.nv-burger span{display:block;width:20px;height:2px;background:var(--nv-ink);margin:4px auto;border-radius:2px;transition:transform .2s}

/* ------------------------------------------------------------
   4. 按钮
   ------------------------------------------------------------ */
.nv-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;
  border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease;line-height:1.4}
.nv-btn-primary{background:var(--nv-grad);color:#fff;box-shadow:0 6px 16px rgba(59,91,219,.24)}
.nv-btn-primary:hover{transform:translateY(-2px);box-shadow:var(--nv-shadow-primary);color:#fff}
.nv-btn-primary:active{transform:translateY(0)}
.nv-btn-ghost{background:#fff;color:var(--nv-ink);border-color:var(--nv-line)}
.nv-btn-ghost:hover{border-color:var(--nv-primary);color:var(--nv-primary);background:var(--nv-primary-50)}
.nv-btn-light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5)}
.nv-btn-light:hover{background:#fff;color:var(--nv-primary-d);border-color:#fff}
.nv-btn-white{background:#fff;color:var(--nv-primary-d);box-shadow:0 6px 18px rgba(24,38,74,.14)}
.nv-btn-white:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(24,38,74,.2);color:var(--nv-primary-d)}
.nv-btn-lg{padding:15px 34px;font-size:16px;border-radius:14px}
.nv-btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
.nv-btn-block{width:100%}
.nv-btn-group{display:flex;gap:14px;flex-wrap:wrap}
.nv-btn-group.nv-center{justify-content:center}
/* 按钮文字颜色兜底：按钮常写成 <a>，容易被外层链接颜色规则（如顶栏 .nv-link、
   正文 .nova a）刷成灰色，这里用 a.nv-btn-* 提升优先级固定各变体文字色 */
a.nv-btn-primary,a.nv-btn-primary:hover,a.nv-btn-primary:focus,a.nv-btn-primary:active{color:#fff}
a.nv-btn-light,a.nv-btn-light:hover,a.nv-btn-light:focus{color:#fff}
a.nv-btn-white,a.nv-btn-white:hover,a.nv-btn-white:focus{color:var(--nv-primary-d)}
a.nv-btn-ghost,a.nv-btn-ghost:focus{color:var(--nv-ink)}
a.nv-btn-ghost:hover{color:var(--nv-primary)}

/* ------------------------------------------------------------
   5. Hero（居中大标题 + 底部特性导航条）
   ------------------------------------------------------------ */
.nv-hero{position:relative;overflow:hidden;isolation:isolate;
  background:
    radial-gradient(circle at 50% -6%,rgba(79,110,224,.14),transparent 48%),
    linear-gradient(180deg,rgba(255,255,255,.7) 0%,rgba(255,255,255,.16) 52%,rgba(255,255,255,0) 100%),
    #eef3fc}
/* 装饰层必须 z-index:-1 落在内容之下。
   若不加 z-index，绝对定位的伪元素会排在 .nv-hero-inner 之上，
   给整块 Hero 蒙一层白纱——实测 H1 文字色会被从 #0d1b30 冲淡到 #636c7b。 */
.nv-hero::before{content:"";position:absolute;inset:0;z-index:-1;
  background-image:linear-gradient(rgba(79,110,224,.06) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(79,110,224,.06) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(ellipse 62% 58% at 50% 26%,#000 30%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 62% 58% at 50% 26%,#000 30%,transparent 100%)}
.nv-hero-inner{position:relative;text-align:center;padding:84px 0 0}
.nv-hero-badge{display:inline-flex;align-items:center;gap:9px;background:#fff;border:1px solid var(--nv-line);
  border-radius:999px;padding:7px 8px 7px 16px;font-size:13px;color:var(--nv-primary-d);font-weight:600;
  box-shadow:var(--nv-shadow-sm);max-width:100%}
.nv-hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--nv-primary);display:inline-block;flex:none}
.nv-hero-badge .nv-tag{background:var(--nv-primary-100);color:var(--nv-primary-d);font-size:11.5px;
  font-weight:700;border-radius:999px;padding:2px 10px;white-space:nowrap}
.nv-hero h1{font-size:52px;letter-spacing:.5px;margin:22px auto 0;max-width:900px}
/* 轮播切换时标题/描述的淡入（防止文字"硬跳"） */
.nv-hero h1 .nv-swap,.nv-hero p.nv-lead.nv-swap{animation:nvCopyIn .38s ease both}
@keyframes nvCopyIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
/* 标题内的渐变高亮（轮播文案用 <em class="nv-grad-text">） */
.nv-hero h1 em.nv-grad-text{font-style:normal}
.nv-hero p.nv-lead{font-size:17px;color:var(--nv-body);margin:18px auto 0;max-width:660px}
.nv-hero-cta{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:32px}
.nv-hero-meta{display:flex;gap:56px;margin-top:52px;flex-wrap:wrap;justify-content:center}
.nv-hero-meta>div{text-align:left}
.nv-hero-meta b{display:block;font-size:28px;color:var(--nv-ink);font-weight:700;font-variant-numeric:tabular-nums}
.nv-hero-meta b em{font-style:normal;color:var(--nv-primary)}
.nv-hero-meta span{font-size:13px;color:var(--nv-muted)}
/* 底部特性导航条：5 项等分铺满整行，文字始终完整不裁切
   （字号/内边距经过测算：1440 下每格 230px，最长标签「稳定安全可控」约 157px，留有余量） */
.nv-hero-tabs{list-style:none;margin:56px 0 0;padding:0;display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));border-top:1px solid var(--nv-line);background:#fff}
.nv-hero-tabs li{min-width:0;margin:0}
.nv-hero-tabs button{position:relative;display:flex;align-items:center;justify-content:center;gap:8px;width:100%;
  background:none;border:0;border-top:2px solid transparent;cursor:pointer;padding:20px 10px;
  font-size:14.5px;font-weight:500;color:var(--nv-muted);font-family:inherit;white-space:nowrap;
  transition:color .18s ease,background .18s ease}
.nv-hero-tabs button:hover{color:var(--nv-ink);background:#fff}
.nv-hero-tabs li.active button{color:var(--nv-primary);font-weight:700;background:transparent}
.nv-hero-tabs li.active button::before{content:"";position:absolute;left:0;right:0;top:-1px;height:2px;background:var(--nv-primary-200)}
/* 自动轮播进度条：只给当前项加 .is-running，动画时长需与 JS 的 ROTATE_MS 一致 */
.nv-hero-tabs li.is-running button::after{content:"";position:absolute;left:0;top:-1px;height:2px;
  width:0;background:var(--nv-primary);border-radius:2px;animation:nvTabProgress 3s linear forwards}
@keyframes nvTabProgress{from{width:0}to{width:100%}}
.nv-hero-tabs svg{width:18px;height:18px;stroke-linecap:round;stroke-linejoin:round}
/* 屏幕变窄时逐级收紧（隐藏图标 → 缩字号），保证 5 项一行且文字完整 */
@media (max-width:1060px){
  .nv-hero-tabs button{padding:17px 8px;font-size:13.5px;gap:6px}
  .nv-hero-tabs svg{width:16px;height:16px}
}
@media (max-width:900px){
  .nv-hero-tabs button{padding:16px 6px;font-size:12.5px;gap:0}
  .nv-hero-tabs svg{display:none}
}

/* ------------------------------------------------------------
   6. 数据条
   ------------------------------------------------------------ */
.nv-stats{background:#fff;border-bottom:1px solid var(--nv-line-2)}
.nv-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:40px 0}
.nv-stat{text-align:center;position:relative}
.nv-stat+.nv-stat::before{content:"";position:absolute;left:0;top:16%;height:68%;width:1px;background:var(--nv-line)}
.nv-stat b{font-size:34px;color:var(--nv-ink);font-weight:700;font-variant-numeric:tabular-nums}
.nv-stat b em{font-style:normal;color:var(--nv-primary);font-size:.62em;font-weight:700}
.nv-stat span{display:block;font-size:14px;color:var(--nv-muted);margin-top:2px}

/* ------------------------------------------------------------
   7. 区块标题
   ------------------------------------------------------------ */
.nv-head{text-align:center;max-width:680px;margin:0 auto 48px}
.nv-head .nv-kicker{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:2px;
  color:var(--nv-primary);background:var(--nv-primary-100);border-radius:999px;padding:6px 16px;margin-bottom:16px}
.nv-head h2{font-size:36px}
.nv-head p{margin:14px 0 0;color:var(--nv-muted)}

/* ------------------------------------------------------------
   8. 特性卡
   ------------------------------------------------------------ */
.nv-fcards{display:grid;grid-template-columns:repeat(4,1fr) 1.1fr;gap:20px;align-items:stretch}
.nv-fcard{background:#fff;border:1px solid var(--nv-line);border-radius:var(--nv-radius);padding:28px 24px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.nv-fcard:hover{transform:translateY(-4px);box-shadow:var(--nv-shadow);border-color:var(--nv-primary-200)}
.nv-fcard h3{font-size:16.5px;margin-bottom:9px}
.nv-fcard p{font-size:13.5px;color:var(--nv-muted);margin:0;line-height:1.75}
.nv-fcard .nv-fi{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.nv-fcard .nv-fi svg{width:22px;height:22px;stroke-width:1.9}
.nv-fi-1{background:var(--nv-primary-100)}.nv-fi-1 svg{stroke:var(--nv-primary)}
.nv-fi-2{background:var(--nv-accent-100)}.nv-fi-2 svg{stroke:var(--nv-accent-d)}
.nv-fi-3{background:var(--nv-success-bg)}.nv-fi-3 svg{stroke:var(--nv-success)}
.nv-fi-4{background:var(--nv-warning-bg)}.nv-fi-4 svg{stroke:var(--nv-warning)}
.nv-fcard-cta{background:var(--nv-grad-deep);border-color:transparent;color:#fff;
  display:flex;flex-direction:column;justify-content:center;box-shadow:0 14px 30px rgba(58,85,201,.25)}
.nv-fcard-cta h3,.nv-fcard-cta p{color:#fff}
.nv-fcard-cta p{opacity:.88}
/* CTA 卡内的注册按钮：白底深蓝字，保证渐变底上的可读性 */
.nv-fcard-cta .nv-btn{background:#fff;color:var(--nv-primary-d);border-color:#fff;
  box-shadow:0 8px 18px rgba(24,38,74,.18);align-self:flex-start;margin-top:14px}
.nv-fcard-cta .nv-btn:hover{background:#fff;color:var(--nv-primary-d);transform:translateY(-2px);
  box-shadow:0 12px 24px rgba(24,38,74,.24)}
.nv-fcard-cta .nv-hot{display:inline-block;background:rgba(255,255,255,.22);color:#fff;font-size:11px;
  font-weight:700;border-radius:6px;padding:1px 8px;margin-left:6px;vertical-align:2px;letter-spacing:.5px}

/* ------------------------------------------------------------
   9. 产品分组选项卡 + 产品卡
   ------------------------------------------------------------ */
.nv-cat-tabs{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:36px}
.nv-cat-tab{display:inline-flex;align-items:center;gap:9px;background:#fff;border:1px solid var(--nv-line);
  border-radius:999px;cursor:pointer;padding:11px 22px;font-size:14.5px;font-weight:500;color:var(--nv-body);
  font-family:inherit;transition:all .18s ease}
.nv-cat-tab svg{width:17px;height:17px;stroke:var(--nv-faint);stroke-width:1.8;transition:stroke .18s ease}
.nv-cat-tab:hover{border-color:var(--nv-primary-200);color:var(--nv-primary);background:var(--nv-primary-50)}
.nv-cat-tab:hover svg{stroke:var(--nv-primary)}
.nv-cat-tab.active{background:var(--nv-cta);border-color:var(--nv-cta);color:#fff;font-weight:600;
  box-shadow:0 8px 18px rgba(59,91,219,.22)}
.nv-cat-tab.active svg{stroke:#fff}
.nv-group-pane{display:none}
.nv-group-pane.active{display:block;animation:nvFade .24s ease}
@keyframes nvFade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
/* 产品卡按实际数量铺满：1 个=单列居中，2 个=各半，≥3 个=三列 */
.nv-product-grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.nv-product-grid>*{max-width:680px;justify-self:center;width:100%}
.nv-product-grid:has(> :nth-child(2))>*{max-width:640px}
.nv-product-grid:has(> :nth-child(3))>*{max-width:none;justify-self:stretch}
@supports not (selector(:has(*))){
  .nv-product-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .nv-product-grid>*{max-width:none;justify-self:stretch}
}
.nv-product{background:#fff;border:1px solid var(--nv-line);border-radius:var(--nv-radius);padding:26px;
  position:relative;overflow:hidden;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column}
.nv-product::before{content:"";position:absolute;right:-46px;top:-46px;width:132px;height:132px;border-radius:50%;
  background:radial-gradient(circle,rgba(79,110,224,.10),transparent 70%);pointer-events:none}
.nv-product:hover{transform:translateY(-4px);box-shadow:var(--nv-shadow);border-color:var(--nv-primary-200)}
.nv-product h3{font-size:17.5px;margin-bottom:7px;position:relative}
.nv-product .nv-desc{font-size:13.5px;color:var(--nv-muted);margin:0;position:relative;min-height:44px}
.nv-product .nv-tags{display:flex;gap:8px;margin:14px 0;flex-wrap:wrap;position:relative}
.nv-product .nv-tags span{font-size:12px;color:var(--nv-primary-d);background:var(--nv-primary-50);
  border:1px solid var(--nv-primary-100);border-radius:6px;padding:2px 10px}
.nv-product .nv-count{margin:auto 0 16px;position:relative;font-size:13px;color:var(--nv-muted)}
.nv-product .nv-count b{font-size:28px;color:var(--nv-ink);font-weight:800;
  font-variant-numeric:tabular-nums;margin-right:4px;line-height:1}
.nv-product .nv-btn{width:100%;position:relative}

/* 产品区为空时的提示 */
.nv-empty{grid-column:1/-1;text-align:center;padding:52px 24px;border:1px dashed var(--nv-line);
  border-radius:var(--nv-radius);background:#fff;color:var(--nv-muted);font-size:14px}
.nv-empty svg{width:40px;height:40px;stroke:var(--nv-faint);stroke-width:1.5;display:block;margin:0 auto 12px}

/* ------------------------------------------------------------
   10. 公告区
   ------------------------------------------------------------ */
.nv-ann{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:22px;align-items:stretch}
.nv-ann-hero{background:var(--nv-grad-deep);border-radius:var(--nv-radius-lg);padding:40px 38px;color:#fff;
  display:flex;flex-direction:column;justify-content:center;position:relative;overflow:hidden}
.nv-ann-hero::after{content:"";position:absolute;right:-70px;bottom:-90px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.16),transparent 68%)}
.nv-ann-hero .nv-hot{display:inline-block;background:rgba(255,255,255,.2);color:#fff;font-size:12px;font-weight:700;
  border-radius:999px;padding:3px 12px;margin-bottom:16px;align-self:flex-start;letter-spacing:.5px}
.nv-ann-hero time{font-size:13px;opacity:.85}
.nv-ann-hero h3{color:#fff;font-size:22px;margin:10px 0 20px;position:relative;line-height:1.5}
.nv-ann-hero a{color:#fff;font-weight:600;font-size:14px;position:relative;display:inline-flex;align-items:center;gap:6px}
.nv-ann-hero a:hover{opacity:.85}
.nv-ann-list{background:#fff;border:1px solid var(--nv-line);border-radius:var(--nv-radius-lg);
  padding:10px 26px;display:flex;flex-direction:column;justify-content:center}
.nv-ann-item{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0;
  border-bottom:1px dashed var(--nv-line)}
.nv-ann-item:last-child{border-bottom:0}
.nv-ann-item a{color:var(--nv-ink);font-size:14.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  display:flex;align-items:center;gap:10px}
.nv-ann-item a::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--nv-primary-200);flex:none;
  transition:background .18s ease}
.nv-ann-item a:hover{color:var(--nv-primary)}
.nv-ann-item a:hover::before{background:var(--nv-primary)}
.nv-ann-item time{font-size:12.5px;color:var(--nv-muted);flex:none;font-variant-numeric:tabular-nums}

/* ------------------------------------------------------------
   11. 统计四卡
   ------------------------------------------------------------ */
.nv-stat4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.nv-stat4 .nv-s4{background:#fff;border:1px solid var(--nv-line);border-radius:var(--nv-radius);text-align:center;
  padding:32px 20px;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.nv-stat4 .nv-s4:hover{transform:translateY(-4px);box-shadow:var(--nv-shadow);border-color:var(--nv-primary-200)}
.nv-stat4 .nv-s4 b{font-size:36px;color:var(--nv-ink);font-weight:800;font-variant-numeric:tabular-nums;line-height:1.2}
.nv-stat4 .nv-s4 span{display:block;font-size:14px;color:var(--nv-muted);margin-top:4px}
.nv-stat4 .nv-s4:hover b{color:var(--nv-primary)}

/* ------------------------------------------------------------
   12. CTA 横幅
   ------------------------------------------------------------ */
.nv-cta-banner{background:var(--nv-grad-deep);border-radius:var(--nv-radius-lg);padding:60px 40px;text-align:center;
  color:#fff;position:relative;overflow:hidden;isolation:isolate;box-shadow:0 20px 44px rgba(58,85,201,.22)}
.nv-cta-banner::before{content:"";position:absolute;inset:0;z-index:-1;
  background-image:linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:38px 38px;
  mask-image:radial-gradient(ellipse 70% 80% at 50% 50%,#000 20%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 70% 80% at 50% 50%,#000 20%,transparent 100%)}
.nv-cta-banner h2{color:#fff;font-size:32px;margin-bottom:12px}
.nv-cta-banner p{color:rgba(255,255,255,.86);margin:0 auto 30px;max-width:520px}
.nv-cta-banner .nv-btn-group{justify-content:center}

/* ------------------------------------------------------------
   13. 购物车 / 产品列表页（cart/nova，走官网头尾外壳，无会员中心侧栏）
   ------------------------------------------------------------ */
/* --- 页头：面包屑 + 标题 + 右侧购物车按钮 --- */
.nv-cart-hero{padding:40px 0}
.nv-cart-hero-inner{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.nv-cart-hero h1{font-size:34px;margin:6px 0 8px}
.nv-cart-hero p{margin:0;color:var(--nv-muted);font-size:14.5px}
.nv-cart-hero-act{display:flex;align-items:center;gap:14px;flex:none}
.nv-cart-count{font-size:13.5px;color:var(--nv-muted);background:#fff;border:1px solid var(--nv-line);
  border-radius:999px;padding:7px 16px;white-space:nowrap}
.nv-crumbs .nv-sep{color:var(--nv-faint);margin:0 2px}

/* --- 一级分类胶囊页签 --- */
.nv-cart-body{padding:28px 0 72px}
/* 配置页/结算页等内容由 cart 主题模板自带 Bootstrap .row，需要容器约束（.row 有 -12px 负边距） */
.nv-cfg-wrap{padding-top:28px;padding-bottom:64px}
/* 兜底：直接挂在页面根上的 Bootstrap 栅格行，按页面容器对齐。
   cart 主题的自有模板（configureproduct / viewcart / v10 等）原本靠会员中心的
   main-content > container-fluid 居中，换到官网外壳后失去容器约束，会贴边并横向溢出
   （实测 .row 变成 x=-12、宽 1464px）。
   这里把根级 .row 收成与 .nv-container 同宽并居中；列内的 12px 内边距正好充当左右留白，
   因此不需要再补偿 .row 的负边距。
   根作用域的 .row 只会出现在 cart 页面（官网页面零 Bootstrap 依赖），不影响官网。 */
.nova>section>.row,.nova>div>.row,.nova>form>.row{
  max-width:calc(var(--nv-max) - 48px);margin-left:auto;margin-right:auto}
.nv-cart-tabs{display:flex;gap:10px;flex-wrap:wrap;padding-bottom:22px;border-bottom:1px solid var(--nv-line);
  margin-bottom:26px}
.nv-cart-tab{display:inline-flex;align-items:center;gap:9px;background:#fff;border:1px solid var(--nv-line);
  border-radius:999px;cursor:pointer;padding:11px 22px;font-size:14.5px;font-weight:500;color:var(--nv-body);
  font-family:inherit;transition:all .18s ease;white-space:nowrap}
.nv-cart-tab svg{width:17px;height:17px;stroke:var(--nv-faint);stroke-width:1.8;flex:none;transition:stroke .18s ease}
.nv-cart-tab:hover{border-color:var(--nv-primary-200);color:var(--nv-primary);background:var(--nv-primary-50)}
.nv-cart-tab:hover svg{stroke:var(--nv-primary)}
.nv-cart-tab.active{background:var(--nv-cta);border-color:var(--nv-cta);color:#fff;font-weight:600;
  box-shadow:0 8px 18px rgba(59,91,219,.22)}
.nv-cart-tab.active svg{stroke:#fff}
.nv-cart-pane{display:none}
.nv-cart-pane.active{display:block;animation:nvFade .24s ease}

/* --- 左侧分组栏 + 右侧产品区 --- */
.nv-cart-layout{display:grid;grid-template-columns:296px minmax(0,1fr);gap:26px;align-items:start}
.nv-cart-side{background:#fff;border:1px solid var(--nv-line);border-radius:var(--nv-radius);overflow:hidden;
  position:sticky;top:96px}
.nv-cart-side-head{padding:15px 20px;font-size:14px;font-weight:700;color:var(--nv-ink);
  background:var(--nv-primary-50);border-bottom:1px solid var(--nv-line)}
.nv-cart-side-list{list-style:none;margin:0;padding:8px}
.nv-cart-side-list li+li{margin-top:4px}
.nv-cart-side-list a{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 13px;border-radius:var(--nv-radius-sm);color:var(--nv-body);transition:all .16s ease}
.nv-cart-side-list a:hover{background:var(--nv-primary-50);color:var(--nv-primary)}
.nv-cart-side-list li.active a{background:var(--nv-primary-100)}
.nv-cs-main{display:flex;flex-direction:column;gap:3px;min-width:0}
.nv-cs-name{font-size:14px;font-weight:600;color:var(--nv-ink);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nv-cart-side-list li.active .nv-cs-name{color:var(--nv-primary-d)}
.nv-cs-desc{font-size:12px;color:var(--nv-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nv-cs-side{display:flex;align-items:center;gap:6px;flex:none}
.nv-cs-qty,.nv-cs-badge{font-size:11px;font-weight:600;border-radius:5px;padding:2px 7px;white-space:nowrap}
.nv-cs-qty{background:var(--nv-warning-bg);color:var(--nv-warning)}
.nv-cs-badge{background:var(--nv-primary-100);color:var(--nv-primary-d)}
.nv-cart-side-empty{margin:0;padding:34px 20px;text-align:center;font-size:13px;color:var(--nv-faint)}
.nv-cart-side-foot{padding:13px 20px;border-top:1px solid var(--nv-line-2);font-size:12.5px;
  color:var(--nv-muted);display:flex;gap:6px;flex-wrap:wrap}
.nv-cart-side-foot a{color:var(--nv-primary);font-weight:600}

/* --- 二级分组分区 + 产品卡网格 --- */
.nv-cart-main{min-width:0}
/* 只有一个二级分组时，分区标题与左侧已选项重复，隐藏以减少噪音 */
.nv-single-group .nv-cart-sec-head{display:none}
.nv-cart-sec+.nv-cart-sec{margin-top:34px}
.nv-cart-sec-head{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.nv-cart-sec-head h3{font-size:19px;position:relative;padding-left:13px}
.nv-cart-sec-head h3::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:17px;border-radius:4px;background:var(--nv-grad)}
.nv-cart-sec-head>span{font-size:13px;color:var(--nv-muted)}
.nv-pcard-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.nv-pcard{background:#fff;border:1px solid var(--nv-line);border-radius:var(--nv-radius);padding:22px;
  display:flex;flex-direction:column;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.nv-pcard:hover{transform:translateY(-4px);box-shadow:var(--nv-shadow);border-color:var(--nv-primary-200)}
.nv-pcard-out{opacity:.72}
.nv-pcard-out:hover{transform:none;box-shadow:none}
.nv-pcard-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:14px}
.nv-pcard-head h4{margin:0;font-size:16.5px;line-height:1.4}
.nv-pcard-stock{font-size:11.5px;font-weight:600;border-radius:5px;padding:3px 9px;white-space:nowrap;flex:none}
.nv-stock-ok{background:var(--nv-success-bg);color:var(--nv-success)}
.nv-stock-warn{background:var(--nv-warning-bg);color:var(--nv-warning)}
.nv-stock-out{background:var(--nv-danger-bg);color:var(--nv-danger)}
.nv-pcard-spec{flex:1;margin-bottom:16px}
.nv-spec-row{display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:8px 0;border-bottom:1px dashed var(--nv-line-2);font-size:13px}
.nv-spec-row:last-child{border-bottom:0}
.nv-spec-row .nv-k{color:var(--nv-muted);flex:none}
.nv-spec-row .nv-v{color:var(--nv-ink);font-weight:600;text-align:right;word-break:break-word}
.nv-spec-line .nv-v{font-weight:400;color:var(--nv-body);text-align:left}
.nv-pcard-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--nv-line-2)}
.nv-pcard-price{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.nv-pcard-price b{font-size:26px;font-weight:800;color:var(--nv-primary-d);
  font-variant-numeric:tabular-nums;line-height:1}
.nv-pcard-price small{font-size:12.5px;color:var(--nv-muted)}
.nv-pcard-origin,.nv-pcard-trial{flex:1 1 100%;font-size:12px}
.nv-pcard-origin{color:var(--nv-faint);text-decoration:line-through}
.nv-pcard-trial{color:var(--nv-warning);text-decoration:none}
.nv-btn-disabled{background:var(--nv-bg);color:var(--nv-faint);border-color:var(--nv-line);cursor:not-allowed}
.nv-cart-empty{background:#fff;border:1px dashed var(--nv-line);border-radius:var(--nv-radius);
  padding:64px 24px;text-align:center;color:var(--nv-muted)}
.nv-cart-empty svg{width:48px;height:48px;stroke:var(--nv-faint);stroke-width:1.4;display:block;margin:0 auto 14px}
.nv-cart-empty p{margin:0 0 18px}
.nv-cart-empty-tip{display:block;margin-top:-6px;font-size:13px;color:var(--nv-faint)}
.nv-cart-empty-tip a{color:var(--nv-primary)}
.nv-cart-note{display:flex;align-items:center;gap:8px;margin:32px 0 0;padding:14px 18px;font-size:13px;
  color:var(--nv-muted);background:#fff;border:1px solid var(--nv-line);border-radius:var(--nv-radius)}
.nv-cart-note::before{content:"i";flex:none;width:17px;height:17px;border-radius:50%;background:var(--nv-primary-100);
  color:var(--nv-primary-d);font-size:11px;font-weight:700;font-style:italic;display:flex;align-items:center;justify-content:center;line-height:1}
.nv-cart-note a{color:var(--nv-primary)}
@media (max-width:1180px){
  .nv-pcard-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1024px){
  .nv-cart-layout{grid-template-columns:230px minmax(0,1fr);gap:20px}
  .nv-cart-side{position:static}
}
@media (max-width:768px){
  .nv-cart-hero{padding:26px 0}
  .nv-cart-hero h1{font-size:26px}
  .nv-cart-hero-act{width:100%;justify-content:space-between}
  .nv-cart-hero-act .nv-btn{flex:1 1 auto}
  .nv-cart-body{padding:18px 0 48px}
  /* 页签横滑 */
  .nv-cart-tabs{flex-wrap:nowrap;overflow-x:auto;overflow-y:hidden;margin:0 -18px 22px;padding:2px 18px 18px;
    scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .nv-cart-tabs::-webkit-scrollbar{display:none}
  .nv-cart-tab{flex:0 0 auto;scroll-snap-align:start;padding:10px 18px;font-size:13.5px}
  .nv-cart-layout{grid-template-columns:1fr;gap:18px}
  .nv-cart-side-list{display:flex;gap:8px;overflow-x:auto;padding:10px;scrollbar-width:none}
  .nv-cart-side-list::-webkit-scrollbar{display:none}
  .nv-cart-side-list li{flex:0 0 auto}
  .nv-cart-side-list li+li{margin-top:0}
  .nv-cart-side-list a{flex-direction:column;align-items:flex-start;gap:4px;padding:10px 14px;
    border:1px solid var(--nv-line);min-width:150px}
  .nv-cart-side-list li.active a{border-color:var(--nv-primary-200)}
  .nv-pcard-grid{grid-template-columns:1fr}
}

/* ------------------------------------------------------------
   13. 页脚
   ------------------------------------------------------------ */
.nv-footer{background:var(--nv-bg);border-top:1px solid var(--nv-line);padding:64px 0 0;margin-top:8px}
.nv-footer-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr) 1.3fr;gap:36px;padding-bottom:44px}
.nv-footer .nv-brand{margin-bottom:16px}
.nv-footer .nv-brand img{height:32px}
/* 浅色页脚上的 logo 兜底：深色 logo 直接显示，浅色 logo 也能看清 */
.nv-footer .nv-brand img.nv-logo-light{filter:brightness(0) saturate(100%) invert(24%) sepia(92%) saturate(2600%) hue-rotate(224deg) brightness(96%) contrast(98%)}
.nv-footer p.nv-fintro{font-size:13.5px;color:var(--nv-muted);margin:0 0 18px;line-height:1.8;max-width:320px}
.nv-footer h4{font-size:14.5px;margin-bottom:16px;letter-spacing:.3px}
.nv-footer ul{list-style:none;margin:0;padding:0}
.nv-footer ul li{margin:10px 0}
.nv-footer ul a{font-size:13.5px;color:var(--nv-muted)}
.nv-footer ul a:hover{color:var(--nv-primary)}
.nv-fcontact li{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--nv-muted);line-height:1.6}
.nv-fcontact svg{width:16px;height:16px;stroke:var(--nv-primary);stroke-width:1.8;flex:none;margin-top:4px}
.nv-flinks{border-top:1px solid var(--nv-line);padding:18px 0;display:flex;gap:6px;flex-wrap:wrap;align-items:center;
  font-size:13px;color:var(--nv-muted)}
.nv-flinks a{color:var(--nv-muted);margin-right:14px}
.nv-flinks a:hover{color:var(--nv-primary)}
.nv-copyright{border-top:1px solid var(--nv-line);padding:18px 0;text-align:center;font-size:13px;color:var(--nv-muted)}
.nv-copyright a{color:var(--nv-muted)}

/* ------------------------------------------------------------
   14. 内页
   ------------------------------------------------------------ */
.nv-page-hero{background:linear-gradient(180deg,#f6f9ff,#fff);border-bottom:1px solid var(--nv-line-2);padding:64px 0}
.nv-page-hero h1{font-size:34px;margin-bottom:10px}
.nv-page-hero p{margin:0;color:var(--nv-muted);max-width:760px}
.nv-crumbs{font-size:13px;color:var(--nv-muted);margin-bottom:14px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nv-crumbs a{color:var(--nv-primary)}
.nv-crumbs a:hover{color:var(--nv-primary-d)}
.nv-article{max-width:820px;margin:0 auto}
.nv-article-body{margin-top:28px;color:var(--nv-body);font-size:15.5px;line-height:1.9}
.nv-article-body img{height:auto;border-radius:var(--nv-radius-sm)}
.nv-article-body blockquote{margin:20px 0;padding:14px 20px;background:var(--nv-primary-50);
  border-left:3px solid var(--nv-primary);border-radius:0 10px 10px 0;color:var(--nv-body)}
.nv-article-body pre{background:#0d1b30;color:#e6edf8;padding:16px 18px;border-radius:12px;overflow:auto;font-size:13.5px}
.nv-article-body code{background:var(--nv-primary-50);color:var(--nv-primary-d);padding:2px 6px;border-radius:5px;font-size:13.5px}
.nv-list-item{background:#fff;border:1px solid var(--nv-line);border-radius:var(--nv-radius);padding:24px 28px;
  margin-bottom:16px;display:block;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.nv-list-item:hover{transform:translateY(-2px);box-shadow:var(--nv-shadow);border-color:var(--nv-primary-200)}
.nv-list-item h3{font-size:17.5px;margin-bottom:8px;line-height:1.5}
.nv-list-item p{margin:0 0 8px;font-size:13.5px;color:var(--nv-muted)}
.nv-list-item time{font-size:12.5px;color:var(--nv-primary);font-weight:600}
.nv-about{max-width:860px;margin:0 auto}
.nv-about h2{font-size:24px;margin:36px 0 14px;padding-left:14px;position:relative}
.nv-about h2::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:18px;border-radius:4px;background:var(--nv-grad)}
.nv-about h2:first-child{margin-top:0}
.nv-about p{color:var(--nv-body);margin:0 0 14px}
.nv-article-nav{margin-top:44px;display:flex;justify-content:space-between;gap:12px}
.nv-empty-state{text-align:center;padding:64px 24px;color:var(--nv-muted)}
.nv-empty-state svg{width:48px;height:48px;stroke:var(--nv-faint);stroke-width:1.4;display:block;margin:0 auto 14px}
.nv-404-code{font-size:96px;font-weight:800;line-height:1.2;background:var(--nv-grad);
  -webkit-background-clip:text;background-clip:text;color:transparent}

/* ------------------------------------------------------------
   15. 响应式
   ------------------------------------------------------------ */
@media (max-width:1180px){
  .nv-fcards{grid-template-columns:repeat(3,minmax(0,1fr))}
  .nv-fcard-cta{grid-column:span 3}
  .nv-footer-grid{grid-template-columns:1.6fr repeat(2,1fr) 1.3fr;row-gap:32px}
}
@media (max-width:1024px){
  .nv-hero h1{font-size:40px}
  .nv-hero-inner{padding-top:64px}
  .nv-hero-meta{gap:40px;margin-top:40px}
  .nv-hero-tabs{margin-top:44px}
  .nv-brand img{height:30px;max-width:150px}
  .nv-fcards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .nv-fcard-cta{grid-column:span 2}
  .nv-product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .nv-ann{grid-template-columns:1fr}
  .nv-footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .nv-stats-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .nv-stat:nth-child(3)::before{display:none}
  .nv-stat4{grid-template-columns:repeat(2,1fr)}
  .nv-section{padding:72px 0}
}
@media (max-width:768px){
  .nv-container{padding:0 18px;overflow-x:clip}
  .nv-nav-inner{height:64px;gap:10px}
  .nv-brand img{height:28px;max-width:118px}
  .nv-menu{position:fixed;left:0;right:0;top:64px;background:#fff;flex-direction:column;align-items:stretch;
    padding:14px 18px 22px;border-bottom:1px solid var(--nv-line);box-shadow:var(--nv-shadow-lg);display:none;margin:0;gap:2px;
    max-height:calc(100vh - 64px);overflow-y:auto;-webkit-overflow-scrolling:touch}
  .nv-menu.open{display:flex}
  .nv-menu>li>a{padding:12px 14px;border-radius:10px}
  /* 移动端：子菜单默认收起（点击父级展开由 JS 处理），并限制整菜单高度避免长列表刷屏 */
  .nv-sub{position:static;transform:none;display:none;opacity:1;box-shadow:none;border:0;max-height:none;overflow:visible;
    border-left:2px solid var(--nv-line);border-radius:0;margin:2px 0 6px 14px;padding:0 0 0 8px;min-width:0}
  .nv-menu>li:hover .nv-sub,.nv-menu>li:focus-within .nv-sub{transform:none}
  .nv-menu>li.nv-subopen>.nv-sub{display:block}
  .nv-menu>li.has-sub>a .caret{transition:transform .2s ease}
  .nv-menu>li.has-sub.nv-subopen>a .caret{transform:rotate(180deg)}
  .nv-sub a{padding:9px 10px;font-size:13.5px}
  .nv-burger{display:block}
  .nv-nav-cta{gap:6px}
  .nv-nav-cta .nv-link:not(.nv-btn){display:none}
  .nv-nav-cta .nv-btn-sm{padding:8px 14px;font-size:13.5px}
  .nv-hero-inner{padding:44px 0 0}
  .nv-hero h1{font-size:30px;margin-top:16px}
  .nv-hero p.nv-lead{font-size:15.5px}
  .nv-hero-cta{gap:10px}
  .nv-hero-cta .nv-btn{flex:0 1 auto;padding:13px 22px;font-size:15px}
  .nv-hero-meta{gap:20px;margin-top:32px;justify-content:space-between}
  .nv-hero-meta b{font-size:22px}
  /* 特性导航条：窄屏 5 项仍等分一行，11px 下最长标签「稳定安全可控」约 70px，可容纳 */
  .nv-hero-tabs{margin:32px 0 0}
  .nv-hero-tabs button{padding:15px 2px;gap:0;font-size:11px}
  .nv-section{padding:56px 0}
  .nv-section.nv-tight{padding:40px 0}
  .nv-head{margin-bottom:32px}
  .nv-head h2,.nv-cta-banner h2{font-size:25px}
  .nv-product-grid,.nv-fcards{grid-template-columns:1fr}
  .nv-product-grid>*,.nv-fcards>*{max-width:none}
  .nv-fcard-cta{grid-column:span 1}
  .nv-stats-grid{grid-template-columns:repeat(2,1fr);padding:32px 0}
  .nv-stat b{font-size:28px}
  .nv-stat4{grid-template-columns:repeat(2,1fr)}
  .nv-ann-hero{padding:30px 24px}
  .nv-ann-hero h3{font-size:19px}
  .nv-ann-list{padding:8px 20px}
  .nv-cta-banner{padding:44px 22px}
  .nv-cta-banner .nv-btn{flex:1 1 auto}
  .nv-footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .nv-footer{padding-top:48px}
  .nv-footer p.nv-fintro{max-width:none}
  .nv-page-hero{padding:44px 0}
  .nv-page-hero h1{font-size:26px}
}
@media (max-width:400px){
  .nv-hero-meta{gap:18px}
  .nv-stat4{grid-template-columns:1fr}
  /* 小屏再收一档，保证「稳定安全可控」在 360/390 下也不裁切 */
  .nv-hero-tabs button{padding:14px 0;font-size:10.5px;letter-spacing:-.2px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .nova *{transition:none !important;animation:none !important}
  /* 轮播本身已由 JS 关闭，这里让当前项仍有完整的顶部指示条 */
  .nv-hero-tabs li.is-running button::after{width:100%}
}