/* roulang page: index */
:root{
  --ng-primary:#12457F;
  --ng-primary-dark:#0E3765;
  --ng-primary-deep:#0A2C50;
  --ng-primary-light:#2E7BC4;
  --ng-accent:#12B0A2;
  --ng-warn:#E39A2E;
  --ng-bg:#F6F8FB;
  --ng-surface:#FFFFFF;
  --ng-border:#E3E9F1;
  --ng-text:#2B3949;
  --ng-muted:#6C7C90;
  --ng-heading:#0E1D30;
  --ng-dark:#0B1B2E;
  --ng-input:#D8E1EC;
  --ng-radius-card:14px;
  --ng-radius-btn:10px;
  --ng-radius-img:12px;
  --ng-radius-pill:999px;
  --ng-shadow-1:0 1px 2px rgba(16,35,64,.05), 0 8px 22px rgba(16,35,64,.06);
  --ng-shadow-2:0 2px 4px rgba(16,35,64,.06), 0 16px 34px rgba(16,35,64,.10);
  --ng-section:96px;
  --ng-font:"PingFang SC","Noto Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--ng-font);
  font-size:16px;
  line-height:1.85;
  color:var(--ng-text);
  background:var(--ng-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;border:0;}
a{color:var(--ng-primary-light);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--ng-primary);}
button{font-family:inherit;}
input,select,textarea{font-family:inherit;font-size:16px;color:var(--ng-text);}
:focus-visible{outline:2px solid var(--ng-accent);outline-offset:2px;border-radius:4px;}

.ng-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
@media (min-width:1440px){
  .ng-container{max-width:1280px;}
}

/* ---------- 导航 ---------- */
.ng-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--ng-border);
  transition:box-shadow .2s ease;
}
.ng-header.is-scrolled{box-shadow:0 1px 2px rgba(16,35,64,.05), 0 8px 22px rgba(16,35,64,.06);}
.ng-nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:72px;
}
.ng-logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--ng-heading);
  font-weight:700;
  font-size:18px;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.ng-logo:hover{color:var(--ng-heading);}
.ng-logo-mark{
  position:relative;
  width:30px;
  height:30px;
  flex:0 0 30px;
  border:2px solid var(--ng-primary);
  border-radius:9px;
  background:#fff;
}
.ng-logo-mark::before,
.ng-logo-mark::after{
  content:"";
  position:absolute;
  background:var(--ng-accent);
  border-radius:2px;
}
.ng-logo-mark::before{width:12px;height:2px;left:7px;top:9px;}
.ng-logo-mark::after{width:12px;height:2px;left:7px;top:15px;box-shadow:0 6px 0 var(--ng-primary-light);}
.ng-logo-text{display:inline-flex;align-items:baseline;gap:6px;}
.ng-logo-sub{
  font-size:11px;
  font-weight:500;
  color:var(--ng-muted);
  border:1px solid var(--ng-border);
  border-radius:var(--ng-radius-pill);
  padding:1px 7px;
  line-height:1.6;
}
.ng-nav-links{display:flex;align-items:center;gap:34px;}
.ng-nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:72px;
  font-size:15px;
  font-weight:500;
  color:#45566B;
  letter-spacing:0;
}
.ng-nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:22px;
  width:0;
  height:2px;
  background:var(--ng-accent);
  border-radius:2px;
  transform:translateX(-50%);
  transition:width .2s ease;
}
.ng-nav-link:hover{color:var(--ng-primary);}
.ng-nav-link:hover::after{width:18px;}
.ng-nav-link.is-active{color:var(--ng-primary);font-weight:600;}
.ng-nav-link.is-active::after{width:18px;}
.ng-nav-actions{display:flex;align-items:center;gap:14px;}

.ng-nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--ng-border);
  border-radius:10px;
  background:#fff;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  padding:0;
}
.ng-nav-toggle span{
  position:relative;
  display:block;
  width:20px;
  height:2px;
  border-radius:2px;
  background:var(--ng-primary);
  transition:background .18s ease;
}
.ng-nav-toggle span::before,
.ng-nav-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:20px;
  height:2px;
  border-radius:2px;
  background:var(--ng-primary);
  transition:transform .2s ease;
}
.ng-nav-toggle span::before{top:-6px;}
.ng-nav-toggle span::after{top:6px;}

.ng-mobile-panel{
  display:none;
  border-top:1px solid var(--ng-border);
  background:#fff;
}
.ng-mobile-panel.is-open{display:block;}
.ng-mobile-panel a{
  display:flex;
  align-items:center;
  min-height:48px;
  padding:0 24px;
  font-size:15px;
  color:#45566B;
  border-bottom:1px solid var(--ng-border);
  border-left:3px solid transparent;
}
.ng-mobile-panel a.is-active{
  color:var(--ng-primary);
  font-weight:600;
  border-left-color:var(--ng-primary);
}
.ng-mobile-panel a:last-child{border-bottom:0;}
.ng-mobile-cta{padding:16px 24px 22px;}

/* ---------- 按钮 ---------- */
.ng-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 28px;
  border-radius:var(--ng-radius-btn);
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.ng-btn-primary{background:var(--ng-primary);color:#fff;box-shadow:var(--ng-shadow-1);}
.ng-btn-primary:hover{background:var(--ng-primary-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--ng-shadow-2);}
.ng-btn-outline{background:#fff;color:var(--ng-primary);border-color:var(--ng-primary);}
.ng-btn-outline:hover{background:#EEF4FB;color:var(--ng-primary);transform:translateY(-2px);}
.ng-btn-ghost{background:#fff;color:var(--ng-primary);border-color:var(--ng-border);}
.ng-btn-ghost:hover{border-color:var(--ng-primary);background:#F7FAFD;color:var(--ng-primary);}
.ng-btn-sm{height:42px;padding:0 20px;font-size:14px;}
.ng-link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--ng-primary);
}
.ng-link-arrow i{transition:transform .18s ease;font-size:12px;}
.ng-link-arrow:hover i{transform:translateX(4px);}

/* ---------- 通用板块 ---------- */
.ng-section{padding:var(--ng-section) 0;}
.ng-section-alt{background:#fff;border-top:1px solid var(--ng-border);border-bottom:1px solid var(--ng-border);}
.ng-section-head{margin-bottom:44px;max-width:760px;}
.ng-eyebrow{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--ng-accent);
  background:#E8F7F5;
  border-radius:var(--ng-radius-pill);
  padding:5px 14px;
  margin-bottom:18px;
}
.ng-h2{
  font-size:30px;
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.01em;
  color:var(--ng-heading);
}
.ng-section-desc{
  margin-top:14px;
  font-size:16px;
  color:var(--ng-muted);
  max-width:680px;
}
.ng-section-bar{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:44px;
  flex-wrap:wrap;
}

/* ---------- Hero ---------- */
.ng-hero{
  background:#fff;
  border-bottom:1px solid var(--ng-border);
  padding:76px 0 84px;
}
.ng-hero-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.ng-hero h1{
  font-size:44px;
  font-weight:800;
  line-height:1.22;
  letter-spacing:-.01em;
  color:var(--ng-heading);
  margin-bottom:20px;
}
.ng-hero-sub{
  font-size:17px;
  line-height:1.75;
  color:var(--ng-muted);
  margin-bottom:32px;
  max-width:520px;
}
.ng-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px;}
.ng-hero-metrics{
  display:flex;
  flex-wrap:wrap;
  gap:38px;
  padding-top:26px;
  border-top:1px solid var(--ng-border);
}
.ng-hero-metrics li{display:flex;flex-direction:column;gap:2px;}
.ng-hero-metrics strong{
  font-size:24px;
  font-weight:700;
  color:var(--ng-primary);
  letter-spacing:-.01em;
  font-variant-numeric:tabular-nums;
  line-height:1.3;
}
.ng-hero-metrics span{font-size:13px;color:var(--ng-muted);}
.ng-hero-figure{
  position:relative;
  border-radius:var(--ng-radius-img);
  overflow:hidden;
  background:#EDF1F7;
  aspect-ratio:5 / 4;
  box-shadow:var(--ng-shadow-1);
}
.ng-hero-figure img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.ng-hero-figure::after{
  content:"";
  position:absolute;
  inset:0;
  background:rgba(18,69,127,.10);
  pointer-events:none;
}

/* ---------- 指标看板 ---------- */
.ng-metrics-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.ng-metric-card{
  background:#fff;
  border:1px solid var(--ng-border);
  border-radius:var(--ng-radius-card);
  padding:26px 24px 22px;
  box-shadow:var(--ng-shadow-1);
  transition:box-shadow .18s ease,transform .18s ease;
}
.ng-metric-card:hover{transform:translateY(-4px);box-shadow:var(--ng-shadow-2);}
.ng-metric-value{
  display:flex;
  align-items:baseline;
  gap:4px;
  font-size:38px;
  font-weight:700;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--ng-accent);
  font-variant-numeric:tabular-nums;
}
.ng-metric-value small{font-size:14px;font-weight:600;color:var(--ng-muted);}
.ng-metric-label{
  margin-top:10px;
  font-size:14px;
  font-weight:600;
  color:var(--ng-heading);
}
.ng-metric-note{margin-top:6px;font-size:13px;color:var(--ng-muted);line-height:1.7;}
.ng-metric-bar{
  margin-top:18px;
  height:3px;
  border-radius:3px;
  background:#EDF1F7;
  overflow:hidden;
}
.ng-metric-bar i{
  display:block;
  height:100%;
  border-radius:3px;
  background:var(--ng-primary-light);
}
.ng-metric-bar i.is-accent{background:var(--ng-accent);}

/* ---------- 服务矩阵 ---------- */
.ng-services-wide{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  margin-bottom:24px;
}
.ng-services-narrow{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.ng-service-card{
  background:#fff;
  border:1px solid var(--ng-border);
  border-radius:var(--ng-radius-card);
  padding:30px 28px;
  box-shadow:var(--ng-shadow-1);
  display:flex;
  flex-direction:column;
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.ng-service-card:hover{transform:translateY(-4px);box-shadow:var(--ng-shadow-2);border-color:#D3E0EE;}
.ng-service-icon{
  width:48px;
  height:48px;
  border-radius:12px;
  border:1px solid var(--ng-border);
  background:#F7FAFD;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:20px;
  color:var(--ng-primary);
  font-size:19px;
}
.ng-service-card h3{
  font-size:19px;
  font-weight:700;
  color:var(--ng-heading);
  line-height:1.4;
  margin-bottom:10px;
}
.ng-service-card p{
  font-size:15px;
  color:var(--ng-muted);
  line-height:1.8;
  margin-bottom:20px;
  flex:1;
}
.ng-service-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.ng-badge{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  font-weight:600;
  color:var(--ng-primary);
  background:#EAF3FB;
  border-radius:var(--ng-radius-pill);
  padding:4px 12px;
  line-height:1.6;
  white-space:nowrap;
}
.ng-badge-accent{color:#0C7C72;background:#E4F6F4;}

/* ---------- 结果对比 ---------- */
.ng-compare{
  background:#fff;
  border:1px solid var(--ng-border);
  border-radius:var(--ng-radius-card);
  overflow:hidden;
  box-shadow:var(--ng-shadow-1);
}
.ng-compare-head,
.ng-compare-row{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr .9fr;
  align-items:center;
  gap:16px;
  padding:0 28px;
}
.ng-compare-head{
  background:var(--ng-primary);
  color:#fff;
  height:56px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
}
.ng-compare-row{
  height:56px;
  border-bottom:1px solid var(--ng-border);
  font-size:15px;
}
.ng-compare-row:last-child{border-bottom:0;}
.ng-compare-row:nth-child(odd){background:#FAFCFE;}
.ng-compare-row h3{font-size:15px;font-weight:600;color:var(--ng-heading);}
.ng-compare-before{color:var(--ng-muted);}
.ng-compare-after{color:var(--ng-primary);font-weight:600;}
.ng-compare-up{
  display:inline-flex;
  align-items:center;
  gap:5px;
  color:var(--ng-warn);
  font-weight:700;
  font-size:14px;
  font-variant-numeric:tabular-nums;
}
.ng-compare-note{
  margin-top:18px;
  font-size:13px;
  color:var(--ng-muted);
}

/* ---------- 最新信息 ---------- */
.ng-news-grid{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:40px;
  align-items:start;
}
.ng-feature-card{
  display:block;
  background:#fff;
  border:1px solid var(--ng-border);
  border-radius:var(--ng-radius-card);
  overflow:hidden;
  box-shadow:var(--ng-shadow-1);
  transition:box-shadow .18s ease,transform .18s ease;
  color:inherit;
}
.ng-feature-card:hover{transform:translateY(-4px);box-shadow:var(--ng-shadow-2);color:inherit;}
.ng-feature-media{
  aspect-ratio:16 / 10;
  background:#EDF1F7;
  overflow:hidden;
}
.ng-feature-media img{width:100%;height:100%;object-fit:cover;}
.ng-feature-body{padding:24px 24px 26px;}
.ng-feature-body h3{
  margin:12px 0 10px;
  font-size:19px;
  font-weight:700;
  line-height:1.45;
  color:var(--ng-heading);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.ng-feature-body p{
  font-size:14px;
  color:var(--ng-muted);
  line-height:1.8;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:14px;
}
.ng-meta{font-size:13px;color:var(--ng-muted);font-variant-numeric:tabular-nums;}

.ng-timeline{position:relative;padding-left:26px;}
.ng-timeline::before{
  content:"";
  position:absolute;
  left:5px;
  top:8px;
  bottom:8px;
  width:2px;
  background:var(--ng-border);
}
.ng-timeline-item{
  position:relative;
  padding:18px 0 20px;
  border-bottom:1px solid var(--ng-border);
}
.ng-timeline-item:first-child{padding-top:0;}
.ng-timeline-item:last-child{border-bottom:0;padding-bottom:0;}
.ng-timeline-item::before{
  content:"";
  position:absolute;
  left:-26px;
  top:26px;
  width:10px;
  height:10px;
  border-radius:50%;
  background:#fff;
  border:2px solid var(--ng-accent);
}
.ng-timeline-item:first-child::before{top:8px;}
.ng-timeline-item h3{
  font-size:17px;
  font-weight:600;
  color:var(--ng-heading);
  line-height:1.5;
  margin-bottom:8px;
}
.ng-timeline-item h3 a{color:inherit;}
.ng-timeline-item h3 a:hover{color:var(--ng-primary);}
.ng-timeline-item p{
  font-size:14px;
  color:var(--ng-muted);
  line-height:1.8;
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:1;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.ng-timeline-foot{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}

.ng-empty{
  border:1px dashed var(--ng-border);
  border-radius:var(--ng-radius-card);
  background:#fff;
  padding:56px 24px;
  text-align:center;
}
.ng-empty p{font-size:15px;color:var(--ng-muted);margin-bottom:20px;}

/* ---------- FAQ ---------- */
.ng-faq{border-top:1px solid var(--ng-border);}
.ng-faq-item{border-bottom:1px solid var(--ng-border);}
.ng-faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:24px 0 24px 0;
  background:none;
  border:0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--ng-heading);
  cursor:pointer;
  border-left:3px solid transparent;
  padding-left:18px;
  transition:border-color .18s ease,color .18s ease;
}
.ng-faq-q:hover{color:var(--ng-primary);}
.ng-faq-item.is-open .ng-faq-q{border-left-color:var(--ng-accent);}
.ng-faq-icon{
  position:relative;
  flex:0 0 16px;
  width:16px;
  height:16px;
}
.ng-faq-icon::before,
.ng-faq-icon::after{
  content:"";
  position:absolute;
  left:0;
  top:7px;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--ng-primary);
  transition:transform .2s ease;
}
.ng-faq-icon::after{transform:rotate(90deg);}
.ng-faq-item.is-open .ng-faq-icon::after{transform:rotate(0deg);}
.ng-faq-a{
  padding:0 0 26px 21px;
  font-size:15px;
  color:var(--ng-muted);
  line-height:1.9;
  max-width:820px;
}

/* ---------- 表单 ---------- */
.ng-form-grid{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:56px;
  align-items:start;
}
.ng-trust-list{margin-top:24px;}
.ng-trust-list li{
  position:relative;
  padding-left:26px;
  margin-bottom:14px;
  font-size:15px;
  color:var(--ng-muted);
  line-height:1.8;
}
.ng-trust-list li::before{
  content:"";
  position:absolute;
  left:4px;
  top:12px;
  width:8px;
  height:8px;
  border-radius:2px;
  background:var(--ng-primary-light);
}
.ng-form-panel{
  background:#fff;
  border:1px solid var(--ng-border);
  border-radius:var(--ng-radius-card);
  padding:34px 32px 36px;
  box-shadow:var(--ng-shadow-1);
}
.ng-field{margin-bottom:20px;}
.ng-field label{
  display:block;
  font-size:14px;
  font-weight:600;
  color:var(--ng-heading);
  margin-bottom:8px;
}
.ng-field input[type="text"],
.ng-field input[type="tel"],
.ng-field select,
.ng-field textarea{
  width:100%;
  height:48px;
  padding:0 14px;
  border:1px solid var(--ng-input);
  border-radius:var(--ng-radius-btn);
  background:#fff;
  outline:none;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.ng-field textarea{
  height:auto;
  min-height:120px;
  padding:12px 14px;
  line-height:1.7;
  resize:vertical;
}
.ng-field input:focus,
.ng-field select:focus,
.ng-field textarea:focus{
  border-color:var(--ng-primary);
  box-shadow:0 0 0 3px rgba(18,69,127,.12);
}
.ng-two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.ng-check{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:13px;
  color:var(--ng-muted);
  line-height:1.7;
  margin-bottom:24px;
}
.ng-check input{margin-top:4px;width:16px;height:16px;accent-color:var(--ng-primary);}
.ng-form-note{margin-top:14px;font-size:13px;color:var(--ng-muted);}

/* ---------- 底部转化条 ---------- */
.ng-cta-bar{
  background:var(--ng-primary);
  border-radius:var(--ng-radius-card);
  padding:32px 36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.ng-cta-bar h2{
  font-size:22px;
  font-weight:700;
  color:#fff;
  line-height:1.4;
}
.ng-cta-bar p{font-size:14px;color:rgba(255,255,255,.82);margin-top:6px;}
.ng-cta-bar .ng-btn-primary{background:#fff;color:var(--ng-primary);}
.ng-cta-bar .ng-btn-primary:hover{background:#EAF3FB;color:var(--ng-primary);}

/* ---------- 页脚 ---------- */
.ng-footer{
  background:var(--ng-dark);
  color:rgba(255,255,255,.85);
  padding:72px 0 0;
  margin-top:var(--ng-section);
}
.ng-footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:44px;
  padding-bottom:52px;
}
.ng-footer h4{
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:18px;
}
.ng-footer p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.75);}
.ng-footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.ng-footer-brand .ng-logo-mark{border-color:rgba(255,255,255,.6);background:transparent;}
.ng-footer-brand .ng-logo-mark::before{background:var(--ng-accent);}
.ng-footer-brand .ng-logo-mark::after{background:rgba(255,255,255,.75);box-shadow:0 6px 0 rgba(255,255,255,.45);}
.ng-footer-brand span{font-size:17px;font-weight:700;color:#fff;}
.ng-footer-links li{margin-bottom:12px;}
.ng-footer-links a{
  font-size:14px;
  color:rgba(255,255,255,.75);
  display:inline-flex;
  align-items:center;
  min-height:26px;
}
.ng-footer-links a:hover{color:var(--ng-accent);}
.ng-footer-contact li{
  font-size:14px;
  color:rgba(255,255,255,.75);
  margin-bottom:12px;
  line-height:1.8;
}
.ng-footer-contact strong{color:#fff;font-weight:600;}
.ng-footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  :root{--ng-section:72px;}
  .ng-nav-links{display:none;}
  .ng-nav-toggle{display:flex;}
  .ng-nav-actions .ng-btn{display:none;}
  .ng-hero{padding:52px 0 62px;}
  .ng-hero-grid{grid-template-columns:1fr;gap:36px;}
  .ng-hero h1{font-size:34px;}
  .ng-hero-figure{aspect-ratio:16 / 10;}
  .ng-metrics-grid{grid-template-columns:repeat(2,1fr);}
  .ng-services-wide{grid-template-columns:1fr;}
  .ng-services-narrow{grid-template-columns:1fr;}
  .ng-news-grid{grid-template-columns:1fr;gap:32px;}
  .ng-form-grid{grid-template-columns:1fr;gap:36px;}
  .ng-footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .ng-compare-head{display:none;}
  .ng-compare-row{
    grid-template-columns:1fr;
    height:auto;
    padding:20px 22px;
    gap:6px;
    align-items:flex-start;
  }
  .ng-compare-row:nth-child(odd){background:#FAFCFE;}
  .ng-compare-row::before{
    content:"";
    display:none;
  }
  .ng-compare-before::before{content:"接入前：";color:var(--ng-muted);font-weight:600;}
  .ng-compare-after::before{content:"接入后：";color:var(--ng-primary);font-weight:600;}
}
@media (max-width:639px){
  :root{--ng-section:56px;}
  .ng-container{padding:0 18px;}
  .ng-nav-inner{min-height:60px;}
  .ng-logo{font-size:16px;}
  .ng-hero h1{font-size:28px;}
  .ng-hero-sub{font-size:15px;}
  .ng-h2{font-size:22px;}
  .ng-section-desc{font-size:15px;}
  .ng-hero-metrics{gap:24px;}
  .ng-hero-metrics strong{font-size:21px;}
  .ng-metrics-grid{grid-template-columns:1fr;}
  .ng-metric-value{font-size:32px;}
  .ng-btn{height:44px;padding:0 22px;font-size:14px;}
  .ng-form-panel{padding:26px 20px 28px;}
  .ng-two-col{grid-template-columns:1fr;}
  .ng-cta-bar{padding:26px 22px;}
  .ng-cta-bar h2{font-size:19px;}
  .ng-footer{padding-top:56px;}
  .ng-footer-grid{grid-template-columns:1fr;}
  .ng-feature-body h3{font-size:17px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ng-primary:#12457F;
  --ng-primary-dark:#0E3765;
  --ng-primary-light:#2E7BC4;
  --ng-primary-soft:#EAF3FB;
  --ng-accent:#12B0A2;
  --ng-accent-soft:#E6F7F5;
  --ng-warn:#E39A2E;
  --ng-bg:#F6F8FB;
  --ng-surface:#FFFFFF;
  --ng-line:#E3E9F1;
  --ng-line-strong:#D8E1EC;
  --ng-text:#2B3949;
  --ng-muted:#6C7C90;
  --ng-heading:#0E1D30;
  --ng-footer:#0B1B2E;
  --ng-radius-card:14px;
  --ng-radius-btn:10px;
  --ng-radius-img:12px;
  --ng-shadow-1:0 1px 2px rgba(16,35,64,.05), 0 8px 22px rgba(16,35,64,.06);
  --ng-shadow-2:0 2px 4px rgba(16,35,64,.06), 0 16px 34px rgba(16,35,64,.10);
  --ng-space:8px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--ng-bg);
  color:var(--ng-text);
  font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ng-primary-light);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--ng-primary);}
h1,h2,h3,h4{color:var(--ng-heading);line-height:1.25;letter-spacing:-.01em;margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
::selection{background:var(--ng-accent-soft);color:var(--ng-primary);}
:focus-visible{outline:2px solid var(--ng-accent);outline-offset:2px;}

.ng-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
@media (min-width:1440px){
  .ng-container{max-width:1280px;}
}
.ng-num{font-variant-numeric:tabular-nums;}

/* ============ header / nav ============ */
.ng-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--ng-line);
  transition:box-shadow .2s ease;
}
.ng-header.is-scrolled{box-shadow:0 6px 18px rgba(16,35,64,.06);}
.ng-nav-inner{
  display:flex;
  align-items:center;
  gap:32px;
  height:72px;
}
.ng-logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.ng-logo-mark{
  position:relative;
  width:26px;
  height:26px;
  background:var(--ng-primary);
  clip-path:polygon(50% 0%,93% 25%,93% 75%,50% 100%,7% 75%,7% 25%);
}
.ng-logo-mark::after{
  content:"";
  position:absolute;
  inset:7px;
  background:var(--ng-accent);
  clip-path:polygon(50% 0%,93% 25%,93% 75%,50% 100%,7% 75%,7% 25%);
}
.ng-logo-text{
  font-size:19px;
  font-weight:700;
  color:var(--ng-heading);
  letter-spacing:-.01em;
  display:inline-flex;
  align-items:baseline;
  gap:4px;
}
.ng-logo-sub{
  font-size:12px;
  font-weight:500;
  color:var(--ng-muted);
  border:1px solid var(--ng-line-strong);
  border-radius:999px;
  padding:1px 7px;
  line-height:1.5;
}
.ng-nav-links{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:8px;
}
.ng-nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:#45566B;
  padding:6px 0;
  transition:color .18s ease;
}
.ng-nav-link:hover{color:var(--ng-primary);}
.ng-nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-1px;
  width:0;
  height:2px;
  background:var(--ng-accent);
  border-radius:2px;
  transform:translateX(-50%);
  transition:width .2s ease;
}
.ng-nav-link:hover::after{width:18px;}
.ng-nav-link.is-active{color:var(--ng-primary);}
.ng-nav-link.is-active::after{width:18px;}
.ng-nav-cta{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:42px;
  padding:0 22px;
  font-size:14px;
  font-weight:600;
  color:var(--ng-primary);
  border:1px solid var(--ng-primary);
  border-radius:var(--ng-radius-btn);
  background:transparent;
  white-space:nowrap;
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.ng-nav-cta:hover{background:var(--ng-primary-soft);color:var(--ng-primary);transform:translateY(-1px);}
.ng-nav-toggle{
  display:none;
  width:44px;
  height:44px;
  margin-left:auto;
  border:1px solid var(--ng-line-strong);
  border-radius:10px;
  background:#fff;
  cursor:pointer;
  position:relative;
  padding:0;
}
.ng-nav-toggle span,
.ng-nav-toggle span::before,
.ng-nav-toggle span::after{
  position:absolute;
  left:50%;
  width:20px;
  height:2px;
  background:var(--ng-primary);
  border-radius:2px;
  transform:translateX(-50%);
  content:"";
  transition:transform .2s ease,opacity .2s ease;
}
.ng-nav-toggle span{top:50%;margin-top:-1px;}
.ng-nav-toggle span::before{top:-6px;}
.ng-nav-toggle span::after{top:6px;}
.ng-nav-toggle.is-open span{background:transparent;}
.ng-nav-toggle.is-open span::before{transform:translateX(-50%) rotate(45deg);top:0;}
.ng-nav-toggle.is-open span::after{transform:translateX(-50%) rotate(-45deg);top:0;}

@media (max-width:1023px){
  .ng-nav-inner{height:60px;gap:16px;}
  .ng-nav-toggle{display:block;}
  .ng-nav-cta{display:none;}
  .ng-nav-links{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin:0;
    background:#fff;
    border-bottom:1px solid var(--ng-line);
    box-shadow:0 16px 30px rgba(16,35,64,.08);
    max-height:0;
    overflow:hidden;
    transition:max-height .26s ease;
  }
  .ng-nav-links.is-open{max-height:320px;}
  .ng-nav-link{
    height:48px;
    display:flex;
    align-items:center;
    padding:0 24px;
    border-bottom:1px solid var(--ng-line);
    border-left:3px solid transparent;
    font-size:15px;
  }
  .ng-nav-link::after{display:none;}
  .ng-nav-link.is-active{
    border-left-color:var(--ng-primary);
    background:#FAFCFE;
  }
  .ng-logo-text{font-size:17px;}
}

/* ============ breadcrumb ============ */
.ng-crumb{
  padding:22px 0 0;
  font-size:13px;
  color:var(--ng-muted);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.ng-crumb a{color:var(--ng-muted);}
.ng-crumb a:hover{color:var(--ng-primary);}
.ng-crumb .ng-crumb-sep{color:#B5C1D2;}
.ng-crumb .ng-crumb-current{
  color:#45566B;
  max-width:60ch;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

/* ============ article hero ============ */
.ng-article-hero{
  position:relative;
  margin-top:20px;
  padding:44px 0 40px;
  border-radius:var(--ng-radius-card);
  overflow:hidden;
  background-color:#EDF2F8;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  border:1px solid var(--ng-line);
}
.ng-article-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:rgba(246,248,251,.92);
}
.ng-article-hero-inner{position:relative;z-index:1;}
.ng-badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 11px;
  font-size:12px;
  font-weight:600;
  color:var(--ng-primary);
  background:var(--ng-primary-soft);
  border-radius:999px;
  letter-spacing:.01em;
}
.ng-article-h1{
  margin-top:18px;
  font-size:38px;
  font-weight:700;
  max-width:860px;
}
.ng-article-meta{
  margin-top:20px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
  font-size:13px;
  color:var(--ng-muted);
}
.ng-article-meta span{display:inline-flex;align-items:center;gap:6px;}
.ng-article-meta .ng-meta-dot{
  width:4px;height:4px;border-radius:50%;background:#C6D1E0;
}

/* ============ article body ============ */
.ng-article-wrap{
  padding:56px 0 24px;
}
.ng-article-body{
  max-width:760px;
  margin:0 auto;
  background:var(--ng-surface);
  border:1px solid var(--ng-line);
  border-radius:var(--ng-radius-card);
  box-shadow:var(--ng-shadow-1);
  padding:48px 52px 52px;
  font-size:16px;
  line-height:1.9;
  color:var(--ng-text);
}
.ng-article-body > * + *{margin-top:1.4em;}
.ng-article-body p{margin:0;}
.ng-article-body h2{
  font-size:24px;
  font-weight:700;
  margin-top:2em;
  padding-left:14px;
  border-left:3px solid var(--ng-primary);
  line-height:1.4;
}
.ng-article-body h3{
  font-size:19px;
  font-weight:700;
  margin-top:1.8em;
}
.ng-article-body h4{font-size:17px;font-weight:700;margin-top:1.5em;}
.ng-article-body a{color:var(--ng-primary-light);border-bottom:1px solid rgba(46,123,196,.35);}
.ng-article-body a:hover{color:var(--ng-primary);border-bottom-color:var(--ng-primary);}
.ng-article-body strong{color:var(--ng-heading);font-weight:700;}
.ng-article-body ul,
.ng-article-body ol{padding-left:0;}
.ng-article-body ul li,
.ng-article-body ol li{position:relative;padding-left:22px;margin-top:.6em;}
.ng-article-body ul li::before{
  content:"";
  position:absolute;
  left:2px;
  top:.72em;
  width:7px;
  height:7px;
  border-radius:2px;
  background:var(--ng-primary);
}
.ng-article-body ol{counter-reset:ngol;}
.ng-article-body ol li{counter-increment:ngol;}
.ng-article-body ol li::before{
  content:counter(ngol);
  position:absolute;
  left:0;
  top:0;
  width:18px;
  height:18px;
  margin-top:.28em;
  border-radius:5px;
  background:var(--ng-primary-soft);
  color:var(--ng-primary);
  font-size:12px;
  font-weight:700;
  line-height:18px;
  text-align:center;
}
.ng-article-body blockquote{
  margin:1.6em 0;
  padding:16px 20px;
  background:#F2F8F8;
  border-left:3px solid var(--ng-accent);
  border-radius:0 10px 10px 0;
  color:#33505C;
}
.ng-article-body blockquote p{margin:0;}
.ng-article-body img{
  border-radius:var(--ng-radius-img);
  width:100%;
  height:auto;
  margin-top:1.6em;
}
.ng-article-body figure{margin:1.6em 0 0;}
.ng-article-body figcaption{
  margin-top:10px;
  font-size:13px;
  color:var(--ng-muted);
  text-align:center;
}
.ng-article-body table{
  width:100%;
  border-collapse:collapse;
  margin-top:1.6em;
  font-size:15px;
  border:1px solid var(--ng-line);
  border-radius:var(--ng-radius-img);
  overflow:hidden;
}
.ng-article-body thead th{
  background:var(--ng-primary);
  color:#fff;
  font-weight:600;
  text-align:left;
  padding:12px 14px;
  border-right:1px solid rgba(255,255,255,.14);
}
.ng-article-body tbody td{
  padding:12px 14px;
  border-top:1px solid var(--ng-line);
  border-right:1px solid var(--ng-line);
}
.ng-article-body tbody tr:nth-child(even){background:#FAFCFE;}
.ng-article-body pre{
  margin-top:1.6em;
  background:#F2F5F9;
  border:1px solid var(--ng-line);
  border-radius:10px;
  padding:18px 20px;
  overflow-x:auto;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;
  line-height:1.7;
  color:#334252;
}
.ng-article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;
  background:#F2F5F9;
  border-radius:6px;
  padding:2px 6px;
}
.ng-article-body pre code{background:none;padding:0;}
.ng-article-body hr{
  border:0;
  border-top:1px solid var(--ng-line);
  margin:2.2em 0;
}

/* ============ empty state ============ */
.ng-article-empty{
  max-width:760px;
  margin:0 auto;
  padding:64px 32px;
  text-align:center;
  background:var(--ng-surface);
  border:1px dashed var(--ng-line-strong);
  border-radius:var(--ng-radius-card);
}
.ng-article-empty h2{font-size:22px;font-weight:700;}
.ng-article-empty p{margin-top:12px;color:var(--ng-muted);font-size:15px;}
.ng-article-empty .ng-btn{margin-top:26px;}

/* ============ buttons ============ */
.ng-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 28px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--ng-radius-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.ng-btn-primary{
  background:var(--ng-primary);
  color:#fff;
  box-shadow:var(--ng-shadow-1);
}
.ng-btn-primary:hover{
  background:var(--ng-primary-dark);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:var(--ng-shadow-2);
}
.ng-btn-ghost{
  background:transparent;
  color:var(--ng-primary);
  border-color:var(--ng-primary);
}
.ng-btn-ghost:hover{
  background:var(--ng-primary-soft);
  color:var(--ng-primary);
  transform:translateY(-2px);
}
.ng-textlink{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--ng-primary);
}
.ng-textlink .ng-arrow{transition:transform .18s ease;}
.ng-textlink:hover .ng-arrow{transform:translateX(4px);}

/* ============ related ============ */
.ng-related{
  padding:64px 0 0;
  border-top:1px solid var(--ng-line);
  margin-top:56px;
}
.ng-section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.ng-section-head h2{font-size:26px;font-weight:700;}
.ng-section-head p{margin-top:8px;font-size:14px;color:var(--ng-muted);}
.ng-card-grid{
  margin-top:28px;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.ng-card{
  display:flex;
  flex-direction:column;
  background:var(--ng-surface);
  border:1px solid var(--ng-line);
  border-radius:var(--ng-radius-card);
  box-shadow:var(--ng-shadow-1);
  overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease;
}
.ng-card:hover{transform:translateY(-4px);box-shadow:var(--ng-shadow-2);}
.ng-card-media{
  position:relative;
  aspect-ratio:16/10;
  background:#EDF2F8;
  overflow:hidden;
}
.ng-card-media img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.ng-card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.ng-card-meta{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  color:var(--ng-muted);
  margin-bottom:10px;
}
.ng-card-title{
  font-size:18px;
  font-weight:700;
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.ng-card-title a{color:var(--ng-heading);}
.ng-card-title a:hover{color:var(--ng-primary);}
.ng-card-text{
  margin-top:10px;
  font-size:14px;
  color:var(--ng-muted);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.ng-card-foot{
  margin-top:auto;
  padding-top:18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

/* ============ cta strip ============ */
.ng-cta-strip{
  margin-top:72px;
  padding:32px 36px;
  background:var(--ng-surface);
  border:1px solid var(--ng-line);
  border-left:4px solid var(--ng-accent);
  border-radius:var(--ng-radius-card);
  box-shadow:var(--ng-shadow-1);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.ng-cta-strip h3{font-size:20px;font-weight:700;}
.ng-cta-strip p{margin-top:8px;font-size:14px;color:var(--ng-muted);}

/* ============ footer ============ */
.ng-footer{
  margin-top:88px;
  background:var(--ng-footer);
  color:rgba(255,255,255,.85);
  padding:64px 0 0;
  font-size:14px;
}
.ng-footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.ng-footer h4{
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin-bottom:16px;
  letter-spacing:0;
}
.ng-footer p{color:rgba(255,255,255,.72);line-height:1.8;}
.ng-footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:18px;
  font-weight:700;
  margin-bottom:14px;
}
.ng-footer-links li,
.ng-footer-contact li{
  padding:7px 0;
  color:rgba(255,255,255,.78);
}
.ng-footer-links a{color:rgba(255,255,255,.85);}
.ng-footer-links a:hover{color:var(--ng-accent);}
.ng-footer-contact strong{color:#fff;font-variant-numeric:tabular-nums;}
.ng-footer-bottom{
  margin-top:48px;
  padding:20px 0 26px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.6);
}

/* ============ responsive ============ */
@media (max-width:1023px){
  .ng-article-h1{font-size:30px;}
  .ng-article-body{padding:36px 30px 40px;}
  .ng-card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .ng-footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .ng-container{padding:0 18px;}
  .ng-article-hero{padding:32px 0 30px;border-radius:12px;}
  .ng-article-h1{font-size:26px;margin-top:14px;}
  .ng-article-meta{gap:10px;font-size:12px;}
  .ng-crumb{padding-top:16px;}
  .ng-crumb .ng-crumb-current{max-width:32ch;}
  .ng-article-wrap{padding:40px 0 16px;}
  .ng-article-body{padding:28px 20px 32px;font-size:15px;border-radius:12px;}
  .ng-article-body h2{font-size:20px;}
  .ng-article-body h3{font-size:17px;}
  .ng-card-grid{grid-template-columns:1fr;gap:16px;}
  .ng-related{padding-top:48px;margin-top:40px;}
  .ng-section-head h2{font-size:22px;}
  .ng-cta-strip{margin-top:48px;padding:24px 20px;}
  .ng-btn{height:44px;width:100%;}
  .ng-cta-strip .ng-btn{width:auto;padding:0 22px;}
  .ng-footer{padding-top:48px;margin-top:56px;}
  .ng-footer-grid{grid-template-columns:1fr;gap:28px;}
  .ng-footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .ng-article-body{padding:24px 16px 28px;}
  .ng-logo-text{font-size:16px;}
  .ng-logo-sub{display:none;}
  .ng-article-empty{padding:44px 20px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
}

/* roulang page: category2 */
:root{
  --ng-primary:#12457F;
  --ng-primary-light:#2E7BC4;
  --ng-accent:#12B0A2;
  --ng-warn:#E39A2E;
  --ng-bg:#F6F8FB;
  --ng-surface:#FFFFFF;
  --ng-line:#E3E9F1;
  --ng-text:#2B3949;
  --ng-muted:#6C7C90;
  --ng-title:#0E1D30;
  --ng-footer:#0B1B2E;
  --ng-radius-card:14px;
  --ng-radius-btn:10px;
  --ng-radius-img:12px;
  --ng-shadow:0 1px 2px rgba(16,35,64,.05),0 8px 22px rgba(16,35,64,.06);
  --ng-shadow-hover:0 2px 4px rgba(16,35,64,.06),0 16px 34px rgba(16,35,64,.10);
  --ng-space:8px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ng-text);
  background:var(--ng-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ng-title);line-height:1.25;letter-spacing:-.01em;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--ng-accent);outline-offset:2px;border-radius:4px}
#ng-top{scroll-margin-top:90px}

.ng-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.ng-container{max-width:1280px}}
@media (max-width:639px){.ng-container{padding:0 18px}}

/* ============ 顶部导航 ============ */
.ng-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.97);border-bottom:1px solid var(--ng-line);transition:box-shadow .2s ease}
.ng-header.is-scrolled{box-shadow:0 6px 18px rgba(16,35,64,.06)}
.ng-header-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.ng-logo{display:flex;align-items:center;gap:10px}
.ng-logo-mark{position:relative;width:28px;height:28px;flex:0 0 28px;background:var(--ng-primary);clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%)}
.ng-logo-mark::after{content:"";position:absolute;left:50%;top:50%;width:9px;height:9px;transform:translate(-50%,-50%);background:#fff;border-radius:2px}
.ng-logo-text{display:flex;flex-direction:column;line-height:1.15}
.ng-logo-main{font-size:17px;font-weight:700;color:var(--ng-title);letter-spacing:0}
.ng-logo-sub{font-size:11px;color:var(--ng-muted);letter-spacing:.16em}
.ng-nav-links{display:flex;align-items:center;gap:34px}
.ng-nav-link{position:relative;padding:6px 0;font-size:15px;font-weight:500;color:#45566B;transition:color .2s ease}
.ng-nav-link::after{content:"";position:absolute;left:50%;bottom:-4px;width:0;height:2px;background:var(--ng-accent);transform:translateX(-50%);transition:width .22s ease}
.ng-nav-link:hover{color:var(--ng-primary)}
.ng-nav-link:hover::after{width:18px}
.ng-nav-link.is-active{color:var(--ng-primary)}
.ng-nav-link.is-active::after{width:18px}
.ng-nav-cta{display:inline-flex;align-items:center;justify-content:center;height:42px;padding:0 22px;border:1px solid var(--ng-primary);border-radius:999px;color:var(--ng-primary);font-size:14.5px;font-weight:600;transition:background .2s ease,color .2s ease,transform .2s ease}
.ng-nav-cta:hover{background:var(--ng-primary);color:#fff;transform:translateY(-1px)}
.ng-burger{display:none;width:44px;height:44px;border:1px solid var(--ng-line);border-radius:10px;background:#fff;align-items:center;justify-content:center;cursor:pointer}
.ng-burger span{display:block;width:20px;height:2px;background:var(--ng-primary);border-radius:2px;position:relative}
.ng-burger span::before,.ng-burger span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ng-primary);border-radius:2px}
.ng-burger span::before{top:-6px}
.ng-burger span::after{top:6px}

@media (max-width:1023px){
  .ng-header-inner{height:60px}
  .ng-burger{display:inline-flex}
  .ng-nav-cta{display:none}
  .ng-nav-links{position:absolute;top:60px;left:-24px;right:-24px;display:none;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--ng-line);box-shadow:0 14px 30px rgba(16,35,64,.08)}
  .ng-nav-links.is-open{display:flex}
  .ng-nav-link{height:48px;padding:0 24px;display:flex;align-items:center;font-size:15px;border-bottom:1px solid var(--ng-line)}
  .ng-nav-link::after{display:none}
  .ng-nav-link.is-active{box-shadow:inset 3px 0 0 var(--ng-primary)}
}

/* ============ 页头 ============ */
.ng-pagehead{position:relative;overflow:hidden;background:#0F2A4A;padding:64px 0 60px}
.ng-pagehead-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;opacity:.34}
.ng-pagehead-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,27,46,.86),rgba(18,69,127,.72))}
.ng-pagehead .ng-container{position:relative;z-index:2}
.ng-breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:18px}
.ng-breadcrumb a{color:rgba(255,255,255,.82);border-bottom:1px solid transparent;transition:border-color .2s ease,color .2s ease}
.ng-breadcrumb a:hover{color:#fff;border-color:var(--ng-accent)}
.ng-breadcrumb .sep{color:rgba(255,255,255,.36)}
.ng-pagehead h1{color:#fff;font-size:40px;line-height:1.24;font-weight:800;max-width:940px;margin:0 0 16px}
.ng-lead{max-width:760px;font-size:16.5px;line-height:1.8;color:rgba(255,255,255,.86);margin:0 0 24px}
.ng-chiprow{display:flex;flex-wrap:wrap;gap:10px}
.ng-chip{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;border:1px solid rgba(255,255,255,.28);color:rgba(255,255,255,.9);font-size:12.5px}
@media (max-width:1023px){
  .ng-pagehead{padding:48px 0 44px}
  .ng-pagehead h1{font-size:30px}
}
@media (max-width:639px){
  .ng-pagehead h1{font-size:26px}
  .ng-lead{font-size:15px}
}

/* ============ 通用板块 ============ */
.ng-section{padding:96px 0}
.ng-section--tint{background:#fff;border-top:1px solid var(--ng-line);border-bottom:1px solid var(--ng-line)}
.ng-section-head{max-width:720px;margin-bottom:40px}
.ng-section-head h2{font-size:30px;margin-bottom:14px}
.ng-section-head p{color:var(--ng-muted);font-size:15.5px}
.ng-eyebrow{display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.1em;color:var(--ng-primary-light);margin-bottom:12px}
@media (max-width:1023px){
  .ng-section{padding:72px 0}
  .ng-section-head h2{font-size:24px}
}
@media (max-width:639px){
  .ng-section{padding:56px 0}
  .ng-section-head h2{font-size:22px}
}

/* ============ 胶囊标签切换 ============ */
.ng-tabs-wrap{position:relative}
.ng-tabs{display:flex;gap:10px;overflow-x:auto;padding:2px 2px 18px;border-bottom:1px solid var(--ng-line);scrollbar-width:none;-ms-overflow-style:none}
.ng-tabs::-webkit-scrollbar{display:none}
.ng-tab{flex:0 0 auto;height:42px;padding:0 20px;border-radius:999px;border:1px solid var(--ng-line);background:#fff;color:#45566B;font-size:14.5px;font-weight:500;cursor:pointer;transition:border-color .2s ease,color .2s ease,background .2s ease,transform .2s ease}
.ng-tab:hover{border-color:var(--ng-primary-light);color:var(--ng-primary);transform:translateY(-1px)}
.ng-tab.is-active{border-color:var(--ng-primary);color:var(--ng-primary);background:#EAF3FB;font-weight:600}
.ng-tabs-hint{display:none;font-size:12px;color:var(--ng-muted);margin-top:-10px}
@media (max-width:639px){.ng-tabs-hint{display:block}}

.ng-panel{display:none;padding-top:44px}
.ng-panel.is-active{display:block;animation:ngFade .28s ease-out}
@keyframes ngFade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  .ng-panel.is-active{animation:none}
  *{transition-duration:.01ms !important}
}

/* ============ 网格 ============ */
.ng-grid{display:grid;gap:24px}
.ng-grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.ng-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.ng-grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.ng-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center}
@media (max-width:1023px){
  .ng-grid-3,.ng-grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ng-split{grid-template-columns:1fr;gap:28px}
}
@media (max-width:639px){
  .ng-grid-2,.ng-grid-3,.ng-grid-4{grid-template-columns:1fr}
}

/* ============ 图片 ============ */
.ng-figure{position:relative;aspect-ratio:16/10;border-radius:var(--ng-radius-img);overflow:hidden;background:#EDF1F7}
.ng-figure img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.ng-figure--wide{aspect-ratio:16/9}
.ng-figure:hover img{transform:scale(1.02)}
.ng-figure-cap{margin-top:12px;font-size:13px;color:var(--ng-muted);text-align:center}

/* ============ 卡片 ============ */
.ng-card{background:var(--ng-surface);border:1px solid var(--ng-line);border-radius:var(--ng-radius-card);box-shadow:var(--ng-shadow);padding:28px;transition:box-shadow .2s ease,transform .2s ease}
.ng-card:hover{box-shadow:var(--ng-shadow-hover);transform:translateY(-3px)}
.ng-card h3{font-size:19px;margin-bottom:12px}
.ng-card p{font-size:15px;color:var(--ng-muted)}
.ng-card-icon{width:42px;height:42px;border:1.5px solid var(--ng-primary);border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.ng-card-icon svg{width:20px;height:20px;stroke:var(--ng-primary);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

.ng-textlink{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:14.5px;font-weight:600;color:var(--ng-primary)}
.ng-textlink .arrow{transition:transform .2s ease}
.ng-textlink:hover .arrow{transform:translateX(4px)}

/* ============ 要点列表 ============ */
.ng-checklist{margin-top:22px;display:grid;gap:14px}
.ng-checklist li{position:relative;padding-left:22px;font-size:15px;color:var(--ng-text)}
.ng-checklist li::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;background:var(--ng-primary);border-radius:2px}

/* ============ 数据小结 ============ */
.ng-stat{background:#fff;border:1px solid var(--ng-line);border-radius:var(--ng-radius-card);box-shadow:var(--ng-shadow);padding:26px 24px;transition:box-shadow .2s ease,transform .2s ease}
.ng-stat:hover{box-shadow:var(--ng-shadow-hover);transform:translateY(-3px)}
.ng-stat-value{display:flex;align-items:baseline;gap:6px;font-variant-numeric:tabular-nums;color:var(--ng-accent);font-size:36px;font-weight:800;letter-spacing:-.02em;line-height:1.1}
.ng-stat-value small{font-size:14px;font-weight:600;color:var(--ng-muted)}
.ng-stat-label{margin-top:10px;font-size:14.5px;font-weight:600;color:var(--ng-title)}
.ng-stat-desc{margin-top:6px;font-size:13.5px;color:var(--ng-muted)}
.ng-stat-bar{margin-top:18px;height:3px;border-radius:999px;background:#EEF3F9;overflow:hidden}
.ng-stat-bar i{display:block;height:100%;border-radius:999px;background:var(--ng-accent)}

/* ============ 折叠说明 ============ */
.ng-details{border-top:1px solid var(--ng-line)}
.ng-details:last-child{border-bottom:1px solid var(--ng-line)}
.ng-details summary{list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:22px 0;font-size:17px;font-weight:600;color:var(--ng-title);transition:color .2s ease}
.ng-details summary::-webkit-details-marker{display:none}
.ng-details summary::after{content:"+";flex:0 0 auto;font-size:22px;line-height:1;font-weight:400;color:var(--ng-primary-light);transition:transform .22s ease}
.ng-details[open] summary{color:var(--ng-primary)}
.ng-details[open] summary::after{content:"−";transform:rotate(180deg)}
.ng-details-body{padding:0 0 26px;font-size:15px;color:var(--ng-muted);max-width:860px;border-left:3px solid transparent;padding-left:0;transition:padding .2s ease}
.ng-details[open] .ng-details-body{border-left-color:var(--ng-accent);padding-left:16px}

/* ============ FAQ ============ */
.ng-faq{border-top:1px solid var(--ng-line)}
.ng-faq summary{list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:20px 0;font-size:17px;font-weight:600;color:var(--ng-title)}
.ng-faq summary::-webkit-details-marker{display:none}
.ng-faq summary::after{content:"+";flex:0 0 auto;font-size:22px;line-height:1;color:var(--ng-primary-light);transition:transform .22s ease}
.ng-faq[open] summary{color:var(--ng-primary)}
.ng-faq[open] summary::after{content:"−";transform:rotate(180deg)}
.ng-faq-body{padding:0 0 24px;font-size:15px;color:var(--ng-muted);max-width:820px}

/* ============ CTA 与表单 ============ */
.ng-cta{background:var(--ng-primary);border-radius:var(--ng-radius-card);padding:44px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px}
.ng-cta h2{color:#fff;font-size:26px;margin-bottom:10px}
.ng-cta p{color:rgba(255,255,255,.82);font-size:15px;max-width:620px}
.ng-cta-actions{display:flex;flex-wrap:wrap;gap:12px}

.ng-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 28px;border-radius:var(--ng-radius-btn);font-size:15.5px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:background .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease}
.ng-btn--primary{background:var(--ng-primary);color:#fff}
.ng-btn--primary:hover{background:#0E3768;box-shadow:var(--ng-shadow-hover);transform:translateY(-2px)}
.ng-btn--ghost{background:transparent;border-color:var(--ng-primary);color:var(--ng-primary)}
.ng-btn--ghost:hover{background:#EAF3FB;transform:translateY(-2px)}
.ng-btn--light{background:#fff;color:var(--ng-primary)}
.ng-btn--light:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,0,0,.18)}
.ng-btn--outline-light{background:transparent;border-color:rgba(255,255,255,.6);color:#fff}
.ng-btn--outline-light:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
@media (max-width:639px){.ng-btn{height:44px;padding:0 20px;font-size:15px}}

.ng-form{background:#fff;border:1px solid var(--ng-line);border-radius:var(--ng-radius-card);box-shadow:var(--ng-shadow);padding:32px}
.ng-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.ng-field{display:flex;flex-direction:column;gap:8px}
.ng-field--full{grid-column:1/-1}
.ng-field label{font-size:13.5px;font-weight:600;color:var(--ng-title)}
.ng-field input,.ng-field select,.ng-field textarea{height:48px;padding:0 14px;border:1px solid #D8E1EC;border-radius:10px;background:#fff;font-size:15px;transition:border-color .2s ease,box-shadow .2s ease}
.ng-field textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.7;resize:vertical}
.ng-field input:focus,.ng-field select:focus,.ng-field textarea:focus{outline:none;border-color:var(--ng-primary);box-shadow:0 0 0 3px rgba(18,69,127,.12)}
.ng-consent{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--ng-muted)}
.ng-consent input{width:18px;height:18px;margin-top:3px;flex:0 0 18px;accent-color:var(--ng-primary)}
.ng-form-note{font-size:13px;color:var(--ng-muted);margin-top:14px}
@media (max-width:639px){.ng-form{padding:24px 20px}.ng-form-grid{grid-template-columns:1fr}}

.ng-trust{display:grid;gap:18px;margin-top:28px}
.ng-trust li{display:flex;gap:12px;font-size:14.5px;color:var(--ng-muted)}
.ng-trust b{display:block;color:var(--ng-title);font-size:15px;font-weight:600;margin-bottom:2px}
.ng-dot{width:8px;height:8px;flex:0 0 8px;margin-top:9px;border-radius:50%;background:var(--ng-accent)}

/* ============ 页脚 ============ */
.ng-footer{background:var(--ng-footer);color:rgba(255,255,255,.85);padding:72px 0 0;margin-top:96px}
.ng-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:48px}
.ng-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;letter-spacing:0}
.ng-footer p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.72)}
.ng-footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;color:#fff;font-size:16px;font-weight:700}
.ng-footer-brand .ng-logo-mark{background:#fff}
.ng-footer-brand .ng-logo-mark::after{background:var(--ng-footer)}
.ng-footer-links li,.ng-footer-contact li{font-size:14px;line-height:1.6;padding:6px 0}
.ng-footer-links a{border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease}
.ng-footer-links a:hover{color:var(--ng-accent);border-color:var(--ng-accent)}
.ng-footer-contact strong{color:#fff}
.ng-footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.58)}
@media (max-width:1023px){
  .ng-footer{padding-top:56px;margin-top:72px}
  .ng-footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:639px){
  .ng-footer-grid{grid-template-columns:1fr}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --ng-primary:#12457F;
  --ng-primary-600:#0E3A6C;
  --ng-primary-100:#EAF3FB;
  --ng-link:#2E7BC4;
  --ng-accent:#12B0A2;
  --ng-accent-050:#EAF8F7;
  --ng-warn:#E39A2E;
  --ng-bg:#F6F8FB;
  --ng-surface:#FFFFFF;
  --ng-line:#E3E9F1;
  --ng-line-strong:#D8E1EC;
  --ng-text:#2B3949;
  --ng-muted:#6C7C90;
  --ng-heading:#0E1D30;
  --ng-footer:#0B1B2E;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(16,35,64,.05),0 8px 22px rgba(16,35,64,.06);
  --sh-2:0 2px 4px rgba(16,35,64,.06),0 16px 34px rgba(16,35,64,.10);
  --ng-font:"PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--ng-font);
  font-size:16px;
  line-height:1.85;
  color:var(--ng-text);
  background:var(--ng-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;padding:0}
h1,h2,h3,h4{color:var(--ng-heading);font-weight:700;line-height:1.25;letter-spacing:-0.01em}
ul,ol{list-style:none}
img{max-width:100%;display:block;border:0}
a{color:var(--ng-link);text-decoration:none;transition:color .18s ease}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
strong{font-weight:700;color:var(--ng-heading)}
:focus-visible{outline:2px solid var(--ng-accent);outline-offset:2px;border-radius:4px}
.ng-num{font-variant-numeric:tabular-nums}

/* ============ 容器 ============ */
.ng-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.grid-container.ng-container{max-width:1200px;padding-left:24px;padding-right:24px}
@media (min-width:1440px){
  .ng-container{max-width:1280px}
  .grid-container.ng-container{max-width:1280px}
}

/* ============ 顶部导航 ============ */
.ng-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--ng-line);
  transition:box-shadow .2s ease;
}
.ng-header.is-scrolled{box-shadow:0 6px 20px rgba(16,35,64,.07)}
.ng-header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
}
.ng-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--ng-heading);
  font-weight:700;
  font-size:17px;
  letter-spacing:-0.01em;
  white-space:nowrap;
}
.ng-brand:hover{color:var(--ng-primary)}
.ng-logo-mark{
  position:relative;
  display:inline-block;
  flex:0 0 26px;
  width:26px;
  height:26px;
  background:var(--ng-primary);
  clip-path:polygon(50% 0%,100% 25%,100% 75%,50% 100%,0% 75%,0% 25%);
}
.ng-logo-mark::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  width:8px;height:8px;
  margin:-4px 0 0 -4px;
  border-radius:50%;
  background:var(--ng-accent);
}
.ng-brand small{
  display:block;
  font-size:11px;
  font-weight:500;
  line-height:1;
  color:var(--ng-muted);
  letter-spacing:.16em;
  margin-top:2px;
}
.ng-brand-text{display:flex;flex-direction:column;line-height:1.1}
.ng-nav-links{display:flex;align-items:center;gap:8px}
.ng-nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 14px;
  font-size:15px;
  font-weight:500;
  color:#45566B;
  border-radius:8px;
  transition:color .18s ease,background .18s ease;
}
.ng-nav-link:hover{color:var(--ng-primary);background:var(--ng-primary-100)}
.ng-nav-link.is-active{color:var(--ng-primary)}
.ng-nav-link.is-active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-1px;
  width:18px;
  height:2px;
  margin-left:-9px;
  border-radius:2px;
  background:var(--ng-accent);
}
.ng-nav-cta{
  display:inline-flex;
  align-items:center;
  height:42px;
  padding:0 22px;
  font-size:14px;
  font-weight:600;
  color:var(--ng-primary);
  border:1px solid var(--ng-primary);
  border-radius:var(--r-btn);
  background:#fff;
  transition:background .18s ease,color .18s ease,transform .18s ease;
  white-space:nowrap;
}
.ng-nav-cta:hover{background:var(--ng-primary-100);color:var(--ng-primary-600);transform:translateY(-1px)}
.ng-menu-btn{
  display:none;
  width:44px;height:44px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border:1px solid var(--ng-line-strong);
  border-radius:10px;
  background:#fff;
}
.ng-menu-btn span{
  display:block;
  width:20px;height:2px;
  border-radius:2px;
  background:var(--ng-primary);
  transition:transform .2s ease,opacity .2s ease;
}
.ng-menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.ng-menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.ng-menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.ng-mobile-panel{
  display:none;
  border-top:1px solid var(--ng-line);
  background:#fff;
  padding:8px 0 16px;
}
.ng-mobile-panel.is-open{display:block}
.ng-mobile-panel a{
  display:flex;
  align-items:center;
  height:48px;
  padding:0 24px;
  font-size:15px;
  font-weight:500;
  color:#45566B;
  border-bottom:1px solid var(--ng-line);
}
.ng-mobile-panel a:last-child{border-bottom:0}
.ng-mobile-panel a.is-active{
  color:var(--ng-primary);
  border-left:3px solid var(--ng-primary);
  padding-left:21px;
  background:var(--ng-bg);
}

/* ============ 面包屑 ============ */
.ng-breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ng-muted);
  padding:28px 0 0;
}
.ng-breadcrumb a{color:var(--ng-muted)}
.ng-breadcrumb a:hover{color:var(--ng-primary)}
.ng-breadcrumb .sep{color:#C4CEDB}

/* ============ 分类页头图区 ============ */
.ng-cat-hero{padding:24px 0 0}
.ng-cat-hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:48px;
  align-items:center;
  padding:40px 0 8px;
}
.ng-cat-hero h1{
  font-size:40px;
  font-weight:800;
  max-width:640px;
  margin-bottom:18px;
}
.ng-cat-hero h1 em{
  font-style:normal;
  color:var(--ng-primary);
}
.ng-cat-hero-lead{
  font-size:17px;
  line-height:1.8;
  color:var(--ng-muted);
  max-width:600px;
  margin-bottom:24px;
}
.ng-badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.ng-badge{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 14px;
  font-size:12px;
  font-weight:600;
  color:var(--ng-primary);
  background:var(--ng-primary-100);
  border-radius:999px;
  white-space:nowrap;
}
.ng-badge.is-accent{color:#0C7C72;background:var(--ng-accent-050)}
.ng-btn-row{display:flex;flex-wrap:wrap;gap:14px}
.ng-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:48px;
  padding:0 28px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--r-btn);
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.ng-btn-primary{
  color:#fff;
  background:var(--ng-primary);
  box-shadow:var(--sh-1);
}
.ng-btn-primary:hover{background:var(--ng-primary-600);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.ng-btn-outline{
  color:var(--ng-primary);
  background:#fff;
  border:1px solid var(--ng-primary);
}
.ng-btn-outline:hover{background:var(--ng-primary-100);transform:translateY(-2px)}
.ng-link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--ng-primary);
}
.ng-link-more::after{content:"→";transition:transform .18s ease}
.ng-link-more:hover::after{transform:translateX(4px)}
.ng-cat-hero-media{
  position:relative;
  border-radius:var(--r-img);
  overflow:hidden;
  background:#EDF1F6;
  box-shadow:var(--sh-1);
}
.ng-cat-hero-media img{
  width:100%;
  aspect-ratio:16 / 11;
  object-fit:cover;
}
.ng-cat-hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:rgba(18,69,127,.10);
  pointer-events:none;
}

/* ============ 主体两栏 ============ */
.ng-main{padding:64px 0 0}
.ng-layout{
  display:flex;
  align-items:flex-start;
  gap:44px;
}
.ng-toc{flex:0 0 258px;max-width:258px}
.ng-toc-inner{
  position:sticky;
  top:96px;
  border-left:1px solid var(--ng-line);
  padding-left:20px;
}
.ng-toc-title{
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--ng-muted);
  text-transform:uppercase;
  margin-bottom:14px;
}
.ng-toc-list li + li{margin-top:2px}
.ng-toc-list a{
  position:relative;
  display:block;
  padding:8px 0 8px 16px;
  font-size:14px;
  line-height:1.5;
  color:#5A6A7E;
  transition:color .18s ease;
}
.ng-toc-list a::before{
  content:"";
  position:absolute;
  left:-21px;
  top:50%;
  width:7px;height:7px;
  margin-top:-3.5px;
  border-radius:50%;
  background:#D3DCE7;
  transition:background .18s ease,transform .18s ease;
}
.ng-toc-list a:hover{color:var(--ng-primary)}
.ng-toc-list a:hover::before{background:var(--ng-link)}
.ng-toc-list a.is-active{color:var(--ng-primary);font-weight:600}
.ng-toc-list a.is-active::before{background:var(--ng-accent);transform:scale(1.25)}
.ng-toc-note{
  margin-top:24px;
  padding:16px;
  background:#fff;
  border:1px solid var(--ng-line);
  border-radius:var(--r-card);
  font-size:13px;
  line-height:1.7;
  color:var(--ng-muted);
}
.ng-toc-note strong{display:block;font-size:14px;color:var(--ng-heading);margin-bottom:6px}

.ng-body{flex:1 1 auto;min-width:0}

/* ============ 内容区块 ============ */
.ng-block{
  padding:0 0 48px;
  margin-bottom:48px;
  border-bottom:1px solid var(--ng-line);
  scroll-margin-top:104px;
}
.ng-block:last-of-type{border-bottom:0;margin-bottom:0}
.ng-block h2{
  position:relative;
  font-size:26px;
  padding-left:16px;
  margin-bottom:16px;
}
.ng-block h2::before{
  content:"";
  position:absolute;
  left:0;top:6px;bottom:6px;
  width:3px;
  border-radius:3px;
  background:var(--ng-primary);
}
.ng-block > p{
  font-size:16px;
  color:var(--ng-text);
  margin-bottom:16px;
  max-width:760px;
}
.ng-block > p:last-child{margin-bottom:0}

.ng-media-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) 288px;
  gap:32px;
  align-items:start;
  margin-top:24px;
}
.ng-media-row.is-reverse{grid-template-columns:288px minmax(0,1fr)}
.ng-media-img{
  border-radius:var(--r-img);
  overflow:hidden;
  background:#EDF1F6;
  box-shadow:var(--sh-1);
}
.ng-media-img img{
  width:100%;
  aspect-ratio:16 / 10;
  object-fit:cover;
}
.ng-media-text p{font-size:15px;color:var(--ng-text);margin-bottom:14px}
.ng-media-text p:last-child{margin-bottom:0}

.ng-check-list{margin-top:18px;display:grid;gap:12px}
.ng-check-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  color:var(--ng-text);
  line-height:1.7;
}
.ng-check-list li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--ng-primary);
}
.ng-check-list li strong{color:var(--ng-heading)}

.ng-note-box{
  margin-top:22px;
  padding:18px 20px;
  background:var(--ng-accent-050);
  border-left:3px solid var(--ng-accent);
  border-radius:0 var(--r-card) var(--r-card) 0;
  font-size:14px;
  line-height:1.8;
  color:#2C4A48;
  max-width:760px;
}

/* ============ 流程步骤 ============ */
.ng-flow{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
  margin-top:26px;
}
.ng-flow-item{
  position:relative;
  background:#fff;
  border:1px solid var(--ng-line);
  border-radius:var(--r-card);
  padding:22px 20px;
  box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease;
}
.ng-flow-item:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.ng-flow-step{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:32px;height:32px;
  border-radius:50%;
  background:var(--ng-primary-100);
  color:var(--ng-primary);
  font-size:13px;
  font-weight:700;
  margin-bottom:14px;
}
.ng-flow-item h3{font-size:17px;margin-bottom:8px}
.ng-flow-item p{font-size:14px;color:var(--ng-muted);line-height:1.75}

/* ============ 数据小结 ============ */
.ng-stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
  margin-top:26px;
}
.ng-stat{
  background:#fff;
  border:1px solid var(--ng-line);
  border-radius:var(--r-card);
  padding:24px 22px;
  box-shadow:var(--sh-1);
}
.ng-stat-value{
  font-size:34px;
  font-weight:700;
  line-height:1.1;
  color:var(--ng-accent);
  margin-bottom:6px;
}
.ng-stat-value span{font-size:14px;font-weight:600;color:var(--ng-muted);margin-left:4px}
.ng-stat-label{font-size:14px;color:var(--ng-muted);line-height:1.7}
.ng-stat-bar{
  margin-top:16px;
  height:3px;
  border-radius:3px;
  background:#EDF1F6;
  overflow:hidden;
}
.ng-stat-bar i{
  display:block;
  height:100%;
  border-radius:3px;
  background:var(--ng-accent);
}

/* ============ 常见问题 ============ */
.ng-faq-list{margin-top:12px;max-width:820px}
.ng-faq-item{border-bottom:1px solid var(--ng-line)}
.ng-faq-item:first-child{border-top:1px solid var(--ng-line)}
.ng-faq-item summary{
  position:relative;
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 4px 20px 0;
  font-size:17px;
  font-weight:600;
  color:var(--ng-heading);
  cursor:pointer;
  transition:color .18s ease;
}
.ng-faq-item summary::-webkit-details-marker{display:none}
.ng-faq-item summary:hover{color:var(--ng-primary)}
.ng-faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  width:22px;
  text-align:center;
  font-size:20px;
  font-weight:400;
  color:var(--ng-primary);
  transition:transform .2s ease;
}
.ng-faq-item[open] summary{color:var(--ng-primary)}
.ng-faq-item[open] summary::after{content:"−";transform:rotate(180deg)}
.ng-faq-item .ng-faq-a{
  padding:0 40px 22px 0;
  font-size:15px;
  line-height:1.85;
  color:var(--ng-muted);
  border-left:3px solid transparent;
  padding-left:14px;
  margin-left:-14px;
}
.ng-faq-item[open] .ng-faq-a{border-left-color:var(--ng-accent)}

/* ============ 底部转化条 ============ */
.ng-cta{
  margin:56px 0 0;
  padding:48px 0 64px;
  border-top:1px solid var(--ng-line);
}
.ng-cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  background:#fff;
  border:1px solid var(--ng-line);
  border-radius:var(--r-card);
  padding:36px 40px;
  box-shadow:var(--sh-1);
}
.ng-cta h2{font-size:24px;margin-bottom:10px}
.ng-cta p{font-size:15px;color:var(--ng-muted);max-width:640px}
.ng-cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto}

/* ============ 页脚 ============ */
.ng-footer{
  background:var(--ng-footer);
  color:rgba(255,255,255,.85);
  padding:64px 0 0;
  margin-top:0;
}
.ng-footer a{color:rgba(255,255,255,.85)}
.ng-footer a:hover{color:var(--ng-accent)}
.ng-footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:44px;
}
.ng-footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:17px;
  font-weight:700;
  margin-bottom:14px;
}
.ng-footer-brand .ng-logo-mark{background:#fff}
.ng-footer-brand .ng-logo-mark::after{background:var(--ng-accent)}
.ng-footer p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.72);max-width:340px}
.ng-footer h4{
  color:#fff;
  font-size:15px;
  margin-bottom:16px;
  padding-bottom:12px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.ng-footer-links li + li,.ng-footer-contact li + li{margin-top:10px}
.ng-footer-links a,.ng-footer-contact li{font-size:14px;color:rgba(255,255,255,.8)}
.ng-footer-contact strong{color:#fff;font-weight:600}
.ng-footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;
  font-size:13px;
  color:rgba(255,255,255,.62);
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .ng-nav-links,.ng-nav-cta{display:none}
  .ng-menu-btn{display:flex}
  .ng-header-inner{height:60px}
  .ng-cat-hero-grid{grid-template-columns:minmax(0,1fr);gap:28px;padding-top:28px}
  .ng-cat-hero-media{order:2}
  .ng-cat-hero h1{font-size:30px}
  .ng-main{padding-top:44px}
  .ng-layout{flex-direction:column;gap:28px}
  .ng-toc{flex:1 1 auto;max-width:100%;width:100%}
  .ng-toc-inner{
    position:static;
    border-left:0;
    padding-left:0;
  }
  .ng-toc-title{margin-bottom:10px}
  .ng-toc-list{
    display:flex;
    gap:10px;
    overflow-x:auto;
    padding-bottom:6px;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  .ng-toc-list::-webkit-scrollbar{display:none}
  .ng-toc-list li + li{margin-top:0}
  .ng-toc-list a{
    white-space:nowrap;
    padding:8px 16px;
    border:1px solid var(--ng-line);
    border-radius:999px;
    background:#fff;
    font-size:13px;
  }
  .ng-toc-list a::before{display:none}
  .ng-toc-list a.is-active{
    border-color:var(--ng-primary);
    background:var(--ng-primary-100);
    color:var(--ng-primary);
  }
  .ng-toc-note{display:none}
  .ng-media-row,.ng-media-row.is-reverse{grid-template-columns:minmax(0,1fr);gap:20px}
  .ng-media-row.is-reverse .ng-media-img{order:2}
  .ng-flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ng-footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:767px){
  .ng-container,.grid-container.ng-container{padding-left:18px;padding-right:18px}
  .ng-cat-hero h1{font-size:28px}
  .ng-cat-hero-lead{font-size:15px}
  .ng-block h2{font-size:22px}
  .ng-stats{grid-template-columns:minmax(0,1fr)}
  .ng-cta-inner{flex-direction:column;align-items:flex-start;padding:28px 22px;gap:22px}
  .ng-cta h2{font-size:21px}
  .ng-btn{width:100%}
  .ng-cta-actions{width:100%}
  .ng-footer{padding-top:48px}
  .ng-footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .ng-footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:519px){
  .ng-flow{grid-template-columns:minmax(0,1fr)}
  .ng-cat-hero h1{font-size:26px}
  .ng-btn-row{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}