/* roulang page: index */
:root{
  --brand:#1E6FA8;
  --brand-2:#2E8BC0;
  --brand-dark:#155E85;
  --brand-light:#E8F4FB;
  --brand-tint:#F2F9FD;
  --accent:#F97316;
  --teal:#14B8A6;
  --bg:#F5F9FC;
  --surface:#FFFFFF;
  --ink:#102A3A;
  --muted:#5B7285;
  --border:#D9E5EE;
  --radius-xl:22px;
  --radius-lg:18px;
  --radius:16px;
  --radius-sm:12px;
  --shadow-xs:0 2px 8px rgba(16,42,58,.05);
  --shadow-sm:0 6px 18px rgba(16,42,58,.07);
  --shadow:0 8px 24px rgba(16,42,58,.08);
  --shadow-lg:0 16px 36px rgba(16,42,58,.14);
  --ease:200ms ease;
  --container:1220px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.8;color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color var(--ease),background var(--ease),border-color var(--ease),transform var(--ease)}
a:hover{color:var(--brand-dark)}
h1,h2,h3,h4,h5{margin:0;font-weight:800;line-height:1.32;letter-spacing:-.2px;color:var(--ink)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(46,139,192,.45);outline-offset:2px;border-radius:8px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:20px;padding-right:20px}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:1030;padding:12px 0 16px;
  background:linear-gradient(180deg,rgba(245,249,252,.98) 58%,rgba(245,249,252,0));
  backdrop-filter:blur(10px);
}
.nav-shell{
  display:flex;align-items:center;gap:16px;
  background:#fff;border:1px solid var(--border);border-radius:20px;
  box-shadow:var(--shadow-sm);padding:10px 14px;min-height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:12px;color:#fff;font-size:17px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  display:grid;place-items:center;box-shadow:0 6px 14px rgba(30,111,168,.28);
}
.brand-text{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:.2px;white-space:nowrap}
.brand:hover .brand-text{color:var(--brand)}
.nav-desktop{
  display:flex;align-items:center;gap:6px;flex:1;justify-content:center;
  overflow-x:auto;scrollbar-width:none;
}
.nav-desktop::-webkit-scrollbar{display:none}
.nav-chip{
  display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 16px;
  border-radius:12px;font-size:15px;font-weight:500;color:var(--ink);
  background:transparent;border:1px solid transparent;white-space:nowrap;
  transition:all var(--ease);
}
.nav-chip i{font-size:17px;color:var(--brand-2)}
.nav-chip:hover{background:var(--brand-light);color:var(--brand-dark);border-color:#D3E9F6;transform:translateY(-1px)}
.nav-chip.active{background:var(--brand-light);color:var(--brand-dark);border-color:var(--brand);font-weight:700}
.nav-chip.active i{color:var(--brand-dark)}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--border);
  background:#fff;color:var(--brand);font-size:18px;display:grid;place-items:center;
  transition:all var(--ease);
}
.nav-toggle:hover{background:var(--brand-light);border-color:var(--brand)}
.mobile-panel{
  background:#fff;border:1px solid var(--border);border-radius:18px;
  box-shadow:var(--shadow);padding:16px;margin-top:12px;
}
.mobile-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
.mobile-grid .nav-chip{height:48px;justify-content:flex-start;background:var(--brand-tint);border-color:var(--border);font-size:14px;padding:0 12px}
@media (max-width:991.98px){
  .nav-desktop{display:none}
  .nav-cta-desktop{display:none}
  .nav-shell{min-height:60px;padding:8px 12px;border-radius:18px}
  .brand-text{font-size:16px}
}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;font-size:15px;font-weight:600;
  line-height:1;border:1px solid transparent;cursor:pointer;transition:all var(--ease);
  text-align:center;white-space:nowrap;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(30,111,168,.22)}
.btn-brand:hover{background:var(--accent);color:#fff;box-shadow:0 12px 24px rgba(249,115,22,.28);transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--brand-light);color:var(--brand-dark);border-color:var(--brand-dark);transform:translateY(-2px)}
.btn-light-soft{background:var(--brand-light);color:var(--brand-dark);border-color:#CDE6F5}
.btn-light-soft:hover{background:#D9EDF9;color:var(--brand-dark);transform:translateY(-2px)}
.btn-sm{height:42px;padding:0 18px;font-size:14px;border-radius:11px}
.btn-block{width:100%}
.link-more{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:14.5px;color:var(--brand)}
.link-more:hover{color:var(--accent);gap:10px}

/* ============ badges & tags ============ */
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;
  background:var(--brand-light);color:var(--brand-dark);font-size:12.5px;font-weight:700;
  letter-spacing:.2px;line-height:1.5;
}
.badge-teal{background:#E1F7F4;color:#0E8C80}
.badge-orange{background:#FFF1E6;color:#C2540B}
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;
  letter-spacing:1.4px;color:var(--brand);background:var(--brand-light);
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
}

/* ============ sections ============ */
.section{padding:88px 0;position:relative}
.section-alt{background:var(--surface)}
.section-tint{background:linear-gradient(180deg,#FFFFFF 0%,var(--brand-tint) 100%)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px}

/* ============ hero ============ */
.hero{position:relative;padding:52px 0 76px;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-160px;right:-200px;width:660px;height:660px;border-radius:50%;
  border:2px solid rgba(30,111,168,.07);pointer-events:none;
}
.hero::after{
  content:"";position:absolute;top:-30px;right:-80px;width:400px;height:400px;border-radius:50%;
  border:2px dashed rgba(249,115,22,.09);pointer-events:none;
}
.hero .container{position:relative;z-index:1}
.hero-title{font-size:clamp(30px,4.2vw,48px);line-height:1.25;margin-bottom:18px}
.hero-title .hl{color:var(--brand);position:relative}
.hero-sub{font-size:17px;color:var(--muted);max-width:580px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-note{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-top:20px}
.hero-note i{color:var(--teal)}
.hero-visual{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow-lg);border:1px solid var(--border);background:#DCEAF3;
}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-visual::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(140deg,rgba(21,94,133,.42),rgba(30,111,168,.10) 58%,rgba(249,115,22,.14));
}
.hero-float{
  position:absolute;left:18px;bottom:18px;right:18px;z-index:2;
  background:rgba(255,255,255,.94);backdrop-filter:blur(6px);
  border-radius:14px;border:1px solid rgba(255,255,255,.9);
  padding:14px 18px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow);
}
.hero-float .num{font-size:24px;font-weight:800;color:var(--brand);line-height:1}
.hero-float .txt{font-size:13.5px;color:var(--muted);line-height:1.5}

/* ============ trust strip ============ */
.trust-strip{margin-top:44px}
.mini-tile{
  display:flex;align-items:center;gap:12px;height:100%;
  background:#fff;border:1px solid var(--border);border-radius:14px;
  padding:16px 18px;box-shadow:var(--shadow-xs);transition:all var(--ease);
}
.mini-tile:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#C6DEF0}
.mini-tile i{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:var(--brand-light);color:var(--brand);font-size:17px;flex-shrink:0;
}
.mini-tile .t{font-size:15px;font-weight:700;line-height:1.4}
.mini-tile .d{font-size:13px;color:var(--muted);line-height:1.5}

/* ============ cards ============ */
.card-soft{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px;height:100%;transition:all var(--ease);
}
.card-soft:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}

.value-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px dashed var(--border)}
.value-item:last-child{border-bottom:0;padding-bottom:0}
.value-icon{
  width:46px;height:46px;border-radius:14px;flex-shrink:0;display:grid;place-items:center;
  background:var(--brand-light);color:var(--brand);font-size:19px;
}
.value-item h3{font-size:18px;margin-bottom:6px}
.value-item p{color:var(--muted);font-size:15px}

.side-panel{
  background:linear-gradient(160deg,var(--brand) 0%,var(--brand-2) 100%);
  border-radius:var(--radius-lg);padding:30px;color:#fff;height:100%;
  box-shadow:0 18px 38px rgba(21,94,133,.24);position:relative;overflow:hidden;
}
.side-panel::after{
  content:"";position:absolute;right:-70px;bottom:-70px;width:220px;height:220px;
  border-radius:50%;border:24px solid rgba(255,255,255,.07);
}
.side-panel h3{color:#fff;font-size:20px;margin-bottom:14px}
.side-panel p{color:rgba(255,255,255,.86);font-size:14.5px}
.side-list{margin-top:20px;position:relative;z-index:1}
.side-list li{
  display:flex;align-items:flex-start;gap:10px;font-size:14.5px;
  color:rgba(255,255,255,.94);padding:7px 0;
}
.side-list li i{color:#8FE3D9;margin-top:6px;font-size:12px}

/* ============ feature / mini cards ============ */
.feature-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow);height:100%;transition:all var(--ease);
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.feature-media{position:relative;overflow:hidden}
.feature-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 400ms ease}
.feature-card:hover .feature-media img{transform:scale(1.04)}
.feature-media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(16,42,58,0) 45%,rgba(16,42,58,.42));
}
.feature-tag{
  position:absolute;left:16px;top:16px;z-index:2;background:rgba(255,255,255,.94);
  color:var(--brand-dark);font-size:12.5px;font-weight:700;padding:5px 13px;border-radius:999px;
}
.feature-body{padding:26px}
.feature-body h3{font-size:clamp(19px,2.2vw,23px);margin:14px 0 12px}
.feature-body p{color:var(--muted);font-size:15px;margin-bottom:18px}
.meta-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.meta-row .time{font-size:13.5px;color:var(--muted);display:inline-flex;align-items:center;gap:6px}

.stack-cards{display:flex;flex-direction:column;gap:24px;height:100%}
.mini-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);flex:1;display:flex;gap:16px;
  transition:all var(--ease);
}
.mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#C6DEF0}
.mini-card .ic{
  width:46px;height:46px;border-radius:14px;flex-shrink:0;display:grid;place-items:center;
  font-size:19px;background:#E1F7F4;color:#0E8C80;
}
.mini-card .ic.orange{background:#FFF1E6;color:#C2540B}
.mini-card h3{font-size:18px;margin-bottom:8px}
.mini-card p{font-size:14.5px;color:var(--muted);margin-bottom:12px}

/* ============ news list (CMS) ============ */
.news-card{display:flex;flex-direction:column;gap:12px}
.news-card h3{font-size:19px;line-height:1.45}
.news-card h3 a{color:var(--ink)}
.news-card h3 a:hover{color:var(--brand)}
.news-excerpt{
  color:var(--muted);font-size:14.5px;line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px dashed var(--border);padding-top:14px;margin-top:auto;flex-wrap:wrap;
}
.news-meta time{font-size:13.5px;color:var(--muted);display:inline-flex;align-items:center;gap:6px}
.empty-state{
  background:#fff;border:1px dashed #C6DEF0;border-radius:var(--radius);
  padding:56px 24px;text-align:center;box-shadow:var(--shadow-xs);
}
.empty-state i{font-size:38px;color:#A9CBE0;display:block;margin-bottom:14px}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:20px}

/* ============ story ============ */
.story-media{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid var(--border)}
.story-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.story-text h2{font-size:clamp(24px,3vw,34px);margin-bottom:18px}
.story-text p{color:var(--muted);font-size:15.5px;margin-bottom:16px}
.story-points{margin:22px 0 26px}
.story-points li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink);padding:6px 0}
.story-points li i{color:var(--teal);margin-top:7px;font-size:13px}

/* ============ stats & steps ============ */
.stat-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow);height:100%;transition:all var(--ease);
}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.stat-card .figure{font-size:clamp(28px,3.4vw,38px);font-weight:800;color:var(--brand);line-height:1.1}
.stat-card .figure span{font-size:16px;color:var(--muted);font-weight:600;margin-left:4px}
.stat-card .label{font-size:15px;font-weight:700;margin:10px 0 6px}
.stat-card .desc{font-size:14px;color:var(--muted)}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:12px}
.step{
  position:relative;background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow-xs);transition:all var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.step .no{
  width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
  background:var(--accent);color:#fff;font-weight:800;font-size:15px;margin-bottom:14px;
  box-shadow:0 6px 14px rgba(249,115,22,.28);
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--muted)}
.step::after{
  content:"";position:absolute;right:-14px;top:44px;width:28px;height:2px;
  background:linear-gradient(90deg,var(--border),transparent);
}
.steps .step:last-child::after{display:none}

/* ============ faq ============ */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:14px;
  margin-bottom:14px;box-shadow:var(--shadow-xs);overflow:hidden;transition:all var(--ease);
}
.faq-item:hover{border-color:#C6DEF0;box-shadow:var(--shadow-sm)}
.faq-item .accordion-button{
  font-size:17px;font-weight:700;color:var(--ink);background:#fff;
  padding:20px 22px;border-radius:14px;box-shadow:none!important;gap:14px;
}
.faq-item .accordion-button:not(.collapsed){color:var(--brand-dark);background:var(--brand-tint)}
.faq-item .accordion-button::after{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;font-size:13px;
  background-image:none;width:30px;height:30px;border-radius:9px;
  background-color:var(--brand-light);color:var(--brand);
  display:grid;place-items:center;flex-shrink:0;transition:all var(--ease);
}
.faq-item .accordion-button:not(.collapsed)::after{
  content:"\f068";background-color:var(--brand);color:#fff;transform:rotate(0deg);
}
.faq-item .accordion-body{
  padding:4px 22px 22px;color:var(--muted);font-size:14.8px;line-height:1.8;
}

/* ============ cta ============ */
.cta-box{
  background:linear-gradient(135deg,#EAF5FC 0%,#F5FBFD 55%,#FFF6ED 100%);
  border:1px solid #CFE6F4;border-radius:var(--radius-xl);
  padding:52px 44px;box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.cta-box::before{
  content:"";position:absolute;left:-90px;top:-90px;width:280px;height:280px;border-radius:50%;
  border:26px solid rgba(255,255,255,.55);pointer-events:none;
}
.cta-box h2{font-size:clamp(24px,3vw,32px);margin-bottom:14px}
.cta-box p{color:var(--muted);font-size:15.5px;max-width:520px}
.cta-form{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.form-control{
  height:48px;border-radius:12px;border:1px solid var(--border);padding:0 16px;
  font-size:15px;color:var(--ink);background:#fff;transition:all var(--ease);box-shadow:none;
}
.form-control::placeholder{color:#9BB2C1}
.form-control:focus{
  border-color:var(--brand);box-shadow:0 0 0 4px rgba(46,139,192,.16);outline:none;
}
.form-hint{font-size:13px;color:var(--muted);margin-top:12px}
.form-hint.ok{color:#0E8C80}
.form-hint.err{color:#C0392B}

/* ============ footer ============ */
.site-footer{background:#0F2A3C;color:#B9CFDD;padding:72px 0 0;margin-top:0}
.site-footer .brand-text{color:#fff}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:18px;letter-spacing:.3px}
.footer-desc{font-size:14.5px;color:#9FBACB;margin-top:18px;max-width:320px}
.footer-link{display:block;color:#B9CFDD;font-size:14.5px;padding:6px 0;transition:all var(--ease)}
.footer-link:hover{color:#fff;transform:translateX(3px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:52px;padding:22px 0;
  font-size:13.5px;color:#8FA9B9;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
}
.footer-bottom a{color:#9FBACB}
.footer-bottom a:hover{color:#fff}
.footer-form .form-control{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.18);color:#fff}
.footer-form .form-control::placeholder{color:#8FA9B9}
.footer-form .form-control:focus{border-color:var(--brand-2);box-shadow:0 0 0 4px rgba(46,139,192,.25)}

/* ============ responsive ============ */
@media (max-width:1199.98px){
  .section{padding:76px 0}
  .nav-chip{padding:0 13px;font-size:14.5px}
}
@media (max-width:991.98px){
  .section{padding:64px 0}
  .hero{padding:36px 0 56px}
  .section-head{margin-bottom:34px}
  .cta-box{padding:40px 28px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step::after{display:none}
}
@media (max-width:767.98px){
  body{font-size:15.5px}
  .section{padding:52px 0}
  .hero-sub{font-size:16px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .card-soft,.mini-card,.stat-card{padding:20px}
  .feature-body{padding:22px}
  .hero-float{padding:12px 14px;gap:10px}
  .hero-float .num{font-size:20px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:575.98px){
  .section{padding:44px 0}
  .container{padding-left:16px;padding-right:16px}
  .hero-title{font-size:clamp(26px,7.6vw,32px)}
  .section-head h2{font-size:23px}
  .steps{grid-template-columns:1fr}
  .cta-box{padding:32px 20px}
  .mobile-grid{grid-template-columns:1fr}
}

/* roulang page: article */
:root{
  --brand:#1E6FA8;
  --brand-2:#2E8BC0;
  --brand-deep:#155E85;
  --brand-soft:#E8F4FB;
  --accent:#F97316;
  --teal:#14B8A6;
  --bg:#F5F9FC;
  --surface:#FFFFFF;
  --ink:#102A3A;
  --muted:#5B7285;
  --line:#D9E5EE;
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 8px 24px rgba(16,42,58,.08);
  --shadow-hover:0 16px 36px rgba(16,42,58,.14);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,transform .2s ease;}
a:hover{color:var(--brand-deep);}
h1,h2,h3,h4{font-weight:800;line-height:1.3;color:var(--ink);margin:0;}
p{margin:0;}
ul,ol{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(46,139,192,.45);outline-offset:2px;border-radius:8px;}

.container{max-width:1220px;padding-left:20px;padding-right:20px;margin:0 auto;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  padding:14px 0;
  background:linear-gradient(180deg,rgba(245,249,252,.96),rgba(245,249,252,.82));
  backdrop-filter:blur(10px);
}
.nav-shell{
  display:flex;
  align-items:center;
  gap:18px;
  min-height:68px;
  padding:10px 16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow);
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);}
.brand:hover{color:var(--brand-deep);}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-2));
  color:#fff;font-size:18px;
  box-shadow:0 6px 16px rgba(30,111,168,.32);
}
.brand-text{font-size:19px;font-weight:800;letter-spacing:.2px;white-space:nowrap;}
.nav-desktop{display:flex;align-items:center;gap:8px;flex:1 1 auto;overflow-x:auto;scrollbar-width:none;}
.nav-desktop::-webkit-scrollbar{display:none;}
.nav-chip{
  display:inline-flex;align-items:center;gap:8px;
  height:46px;padding:0 15px;
  border-radius:12px;
  border:1px solid transparent;
  color:var(--muted);
  font-size:15px;font-weight:600;white-space:nowrap;
}
.nav-chip i{font-size:15px;color:var(--brand-2);}
.nav-chip:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:#CFE6F5;}
.nav-chip.active{background:var(--brand-soft);color:var(--brand-deep);border-color:var(--brand-2);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  width:46px;height:46px;border-radius:12px;
  border:1px solid var(--line);background:#fff;color:var(--brand-deep);font-size:18px;
  display:inline-flex;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--brand-soft);}
.mobile-panel{
  margin-top:12px;padding:16px;
  background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);
}
.mobile-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px;}
.mobile-grid .nav-chip{width:100%;justify-content:flex-start;background:#F7FBFE;border-color:var(--line);}

/* ---------- Buttons / Badges ---------- */
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--brand);color:#fff;border:1px solid var(--brand);
  border-radius:12px;font-weight:700;font-size:15px;
  padding:11px 20px;transition:all .2s ease;
}
.btn-brand:hover,.btn-brand:focus{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(249,115,22,.28);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:#fff;color:var(--brand);border:1px solid var(--brand);
  border-radius:12px;font-weight:700;font-size:15px;padding:11px 20px;transition:all .2s ease;
}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);transform:translateY(-2px);}
.btn-soft{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--brand-soft);color:var(--brand-deep);border:1px solid #CFE6F5;
  border-radius:12px;font-weight:700;font-size:15px;padding:11px 18px;transition:all .2s ease;
}
.btn-soft:hover{background:#D9EDF9;color:var(--brand-deep);}
.btn-block{width:100%;}
.btn-sm{padding:9px 16px;font-size:14px;}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-deep);
  font-size:12.5px;font-weight:700;line-height:1.7;border:1px solid #CFE6F5;
}
.badge-warm{background:#FFF3E8;color:#B5530F;border-color:#FBD9BD;}
.badge-teal{background:#E7F8F5;color:#0E8477;border-color:#C4EDE7;}

/* ---------- Breadcrumb ---------- */
.crumbs-wrap{background:var(--bg);padding:18px 0 4px;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;padding:0;font-size:13.5px;color:var(--muted);}
.crumbs li{display:inline-flex;align-items:center;gap:8px;}
.crumbs li+li::before{content:">";color:#A9BECE;font-weight:600;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--brand);}
.crumbs .current{color:var(--ink);font-weight:700;max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- Article layout ---------- */
.page-main{padding:26px 0 0;}
.article-hero{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:30px 30px 26px;position:relative;overflow:hidden;
}
.article-hero::after{
  content:"";position:absolute;right:-60px;top:-70px;width:230px;height:230px;border-radius:50%;
  background:radial-gradient(circle,rgba(46,139,192,.14),rgba(46,139,192,0) 68%);
  pointer-events:none;
}
.article-hero .kicker{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px;}
.article-hero h1{
  font-size:clamp(28px,3.6vw,42px);
  font-weight:800;
  letter-spacing:.2px;
  margin-bottom:16px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;font-size:13.5px;color:var(--muted);}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:var(--brand-2);}

.article-shell{margin-top:26px;}
.paper{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:34px 34px 38px;
}
.article-body{font-size:17px;line-height:1.85;color:var(--ink);max-width:820px;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{font-size:clamp(22px,2.4vw,28px);margin:2em 0 .8em;font-weight:800;line-height:1.35;}
.article-body h3{font-size:20px;margin:1.6em 0 .6em;font-weight:700;}
.article-body h4{font-size:17px;margin:1.4em 0 .5em;font-weight:700;}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.2em;}
.article-body li{margin:.45em 0;line-height:1.8;}
.article-body blockquote{
  margin:1.5em 0;padding:16px 22px;background:var(--brand-soft);
  border-left:4px solid var(--brand);border-radius:12px;color:var(--brand-deep);font-size:16px;
}
.article-body img{border-radius:14px;margin:1.5em auto;}
.article-body figure{margin:1.5em 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px;}
.article-body pre{
  background:#0F2637;color:#E6F2FA;border-radius:12px;padding:16px 18px;
  overflow:auto;font-size:14px;line-height:1.7;margin:1.4em 0;
}
.article-body code{font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;background:#EFF6FB;color:var(--brand-deep);padding:2px 6px;border-radius:6px;font-size:14px;}
.article-body pre code{background:transparent;color:inherit;padding:0;}
.article-body a{color:var(--brand);text-decoration:underline;}
.article-body a:hover{color:var(--accent);}
.article-body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.article-body th{background:var(--brand-soft);color:var(--brand-deep);font-weight:700;}
.article-body hr{border:0;border-top:1px dashed var(--line);margin:2em 0;}

.article-foot{
  margin-top:32px;padding-top:22px;border-top:1px dashed var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;justify-content:space-between;
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}

/* ---------- Sidebar ---------- */
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px;margin-bottom:20px;
}
.side-card h3{font-size:17px;margin-bottom:14px;display:flex;align-items:center;gap:9px;}
.side-card h3 i{color:var(--brand-2);font-size:15px;}
.sticky-col{position:sticky;top:104px;}
.toc-list{list-style:none;padding:0;margin:0;counter-reset:toc;}
.toc-list li{margin-bottom:8px;}
.toc-list a{
  display:block;padding:9px 12px;border-radius:10px;color:var(--muted);
  font-size:14.5px;font-weight:600;line-height:1.5;border:1px solid transparent;
}
.toc-list a:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:#CFE6F5;}
.side-links{list-style:none;padding:0;margin:0;}
.side-links li+li{margin-top:8px;}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 14px;border-radius:12px;background:#F7FBFE;border:1px solid var(--line);
  color:var(--ink);font-size:14.5px;font-weight:600;
}
.side-links a:hover{background:var(--brand-soft);border-color:#CFE6F5;color:var(--brand-deep);transform:translateX(3px);}
.side-links i{color:var(--brand-2);font-size:13px;}
.side-note{font-size:13px;color:var(--muted);line-height:1.75;}

/* ---------- Related / CTA ---------- */
.section{padding:64px 0 0;}
.section-head{margin-bottom:26px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--brand-deep);
  background:var(--brand-soft);border:1px solid #CFE6F5;border-radius:999px;padding:5px 13px;margin-bottom:14px;
}
.section-head h2{font-size:clamp(24px,3vw,32px);}
.section-head p{color:var(--muted);margin-top:10px;font-size:15.5px;}

.rel-card{
  height:100%;display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;transition:transform .2s ease,box-shadow .2s ease;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.rel-card .thumb{aspect-ratio:16/9;overflow:hidden;background:#E8F0F6;}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.rel-card:hover .thumb img{transform:scale(1.05);}
.rel-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-card .meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted);}
.rel-card h3{font-size:18px;line-height:1.5;}
.rel-card h3 a{color:var(--ink);}
.rel-card h3 a:hover{color:var(--brand);}
.rel-card p{font-size:14.5px;color:var(--muted);line-height:1.7;}
.rel-card .go{margin-top:auto;font-size:14px;font-weight:700;color:var(--brand);display:inline-flex;align-items:center;gap:7px;}
.rel-card .go:hover{gap:11px;}

.cta-band{
  margin-top:64px;
  background:linear-gradient(135deg,#EAF5FC,#F7FBFE 62%);
  border:1px solid #CFE6F5;border-radius:var(--radius-lg);
  padding:36px;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:auto -80px -120px auto;width:320px;height:320px;border-radius:50%;
  border:26px solid rgba(46,139,192,.08);
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px;}
.cta-band p{color:var(--muted);font-size:15.5px;max-width:62ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}

/* ---------- Empty state ---------- */
.empty-state{
  text-align:center;padding:56px 24px;background:#fff;border:1px dashed var(--line);border-radius:var(--radius);
}
.empty-state .ico{
  width:64px;height:64px;border-radius:18px;margin:0 auto 18px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:24px;
}
.empty-state h3{font-size:20px;margin-bottom:10px;}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:20px;}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:72px;padding:56px 0 26px;
  background:#0F2637;color:#C6D8E4;
}
.site-footer .brand-text{color:#fff;}
.site-footer .brand-mark{background:linear-gradient(140deg,var(--brand-2),var(--teal));box-shadow:none;}
.footer-desc{font-size:14px;line-height:1.8;color:#9FB6C6;margin-top:16px;max-width:40ch;}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:16px;}
.footer-link{display:block;font-size:14px;color:#A9C0D0;padding:6px 0;transition:color .2s ease,transform .2s ease;}
.footer-link:hover{color:#fff;transform:translateX(3px);}
.footer-form .form-control{
  height:46px;border-radius:12px;border:1px solid #2A4356;background:#163243;color:#E6F2FA;font-size:14px;
}
.footer-form .form-control::placeholder{color:#7E97A8;}
.footer-form .form-control:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(46,139,192,.25);background:#163243;color:#fff;}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid #22414F;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#8FA9BA;
}
.footer-bottom a{color:#BBD3E2;}
.footer-bottom a:hover{color:#fff;}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .container{max-width:100%;}
  .nav-chip{font-size:14.5px;padding:0 13px;}
}
@media (max-width:991.98px){
  .nav-desktop,.nav-cta-desktop{display:none;}
  .nav-shell{justify-content:space-between;}
  .sticky-col{position:static;margin-top:24px;}
  .article-body{max-width:100%;}
  .section{padding:52px 0 0;}
}
@media (max-width:767.98px){
  .article-hero{padding:24px 20px;}
  .paper{padding:24px 20px 28px;}
  .article-body{font-size:16px;}
  .cta-band{padding:26px 20px;}
  .site-footer{padding:44px 0 22px;}
  .footer-desc{max-width:100%;}
}
@media (max-width:575.98px){
  .brand-text{font-size:16.5px;}
  .brand-mark{width:36px;height:36px;font-size:16px;}
  .mobile-grid{grid-template-columns:1fr;}
  .article-hero h1{font-size:26px;}
  .crumbs .current{white-space:normal;max-width:100%;}
  .cta-actions .btn-brand,.cta-actions .btn-ghost,.cta-actions .btn-soft{width:100%;}
  .article-foot{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category1 */
:root{
  --brand:#1E6FA8;
  --brand-2:#2E8BC0;
  --brand-deep:#155E85;
  --brand-light:#E8F4FB;
  --accent:#F97316;
  --teal:#14B8A6;
  --bg:#F5F9FC;
  --white:#FFFFFF;
  --ink:#102A3A;
  --muted:#5B7285;
  --line:#D9E5EE;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --sh-sm:0 4px 14px rgba(16,42,58,.06);
  --sh:0 8px 24px rgba(16,42,58,.08);
  --sh-lg:0 16px 36px rgba(16,42,58,.14);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Helvetica Neue",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-deep)}
h1,h2,h3,h4{line-height:1.3;font-weight:800;color:var(--ink);margin:0}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
ul{margin:0 0 14px;padding-left:20px}
li{margin-bottom:8px}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(30,111,168,.35);outline-offset:2px;border-radius:8px}
.container{max-width:1220px;padding-left:20px;padding-right:20px}

/* ============ header / nav ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  padding:14px 0;
  background:linear-gradient(180deg,rgba(245,249,252,.96) 60%,rgba(245,249,252,.72));
  backdrop-filter:blur(8px);
}
.nav-shell{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:70px;
  padding:10px 16px;
  background:rgba(255,255,255,.97);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:0 6px 20px rgba(16,42,58,.07);
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:800;font-size:18px;letter-spacing:.2px;white-space:nowrap}
.brand:hover{color:var(--brand-deep)}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:13px;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);
  color:#fff;font-size:19px;
  box-shadow:0 6px 16px rgba(30,111,168,.28);
}
.brand-text{font-size:18px}
.nav-desktop{display:flex;align-items:center;gap:8px;flex:1;justify-content:center;overflow-x:auto;scrollbar-width:none}
.nav-desktop::-webkit-scrollbar{display:none}
.nav-chip{
  display:inline-flex;align-items:center;gap:8px;
  height:46px;padding:0 16px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  color:var(--muted);
  font-size:15px;font-weight:600;
  white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.nav-chip i{font-size:16px;color:var(--brand-2)}
.nav-chip:hover{background:var(--brand-light);color:var(--brand-deep);transform:translateY(-1px)}
.nav-chip.active{background:var(--brand-light);color:var(--brand-deep);border-color:rgba(30,111,168,.4)}
.nav-chip.active i{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  width:46px;height:46px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:#fff;color:var(--brand-deep);
  font-size:18px;
}
.nav-toggle:hover{background:var(--brand-light)}
.mobile-panel{
  margin-top:12px;padding:16px;
  background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--sh);
}
.mobile-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:14px}
.mobile-grid .nav-chip{height:50px;border:1px solid var(--line);justify-content:flex-start;background:#fff}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;
  border-radius:var(--r-sm);
  font-size:15px;font-weight:700;
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn-sm{height:44px;padding:0 18px;font-size:14px}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(30,111,168,.22)}
.btn-brand:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(30,111,168,.28)}
.btn-brand:active{background:#124E70;transform:translateY(0)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#E0620B;color:#fff;transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:rgba(30,111,168,.45)}
.btn-ghost:hover{background:var(--brand-light);color:var(--brand-deep);border-color:var(--brand)}
.btn-block{width:100%}
.link-more{font-weight:700;font-size:15px;display:inline-flex;align-items:center;gap:6px}
.link-more:hover{color:var(--accent);text-decoration:underline}

/* ============ shared blocks ============ */
.section{padding:76px 0}
.section-tight{padding:56px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--brand-light);color:var(--brand-deep);
  font-size:13px;font-weight:700;letter-spacing:.4px;
}
.eyebrow i{font-size:12px;color:var(--teal)}
.section-head{max-width:760px;margin-bottom:32px}
.section-head h2{font-size:clamp(24px,3vw,34px);margin:14px 0 12px}
.section-head p{color:var(--muted);font-size:16px}
.card-x{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh);
  padding:26px;
  transition:transform .2s ease,box-shadow .2s ease;
  height:100%;
}
.card-x:hover{transform:translateY(-4px);box-shadow:var(--sh-lg)}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  background:var(--brand-light);color:var(--brand-deep);
  font-size:12.5px;font-weight:700;
}
.badge-teal{background:rgba(20,184,166,.12);color:#0E8C80}
.badge-orange{background:rgba(249,115,22,.12);color:#C2560B}
.img-cover{border-radius:var(--r-md);overflow:hidden;background:#E3EDF4}
.img-cover img{width:100%;height:100%;object-fit:cover}
.muted{color:var(--muted)}
.hr-line{height:1px;background:var(--line);border:0;margin:32px 0}

/* ============ hero ============ */
.cat-hero{position:relative;padding:56px 0 64px;overflow:hidden}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at 12% 18%,rgba(30,111,168,.08),transparent 42%),
    radial-gradient(circle at 88% 82%,rgba(20,184,166,.08),transparent 46%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:18px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#A9BCC9}
.crumb .now{color:var(--ink);font-weight:600}
.hero-title{font-size:clamp(30px,4.2vw,48px);margin:14px 0 16px}
.hero-title em{font-style:normal;color:var(--brand);position:relative}
.hero-sub{font-size:17px;color:var(--muted);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-figure{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-lg)}
.hero-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(30,111,168,.30),rgba(21,94,133,.12) 55%,rgba(20,184,166,.18));
}
.hero-caption{
  position:absolute;left:18px;bottom:18px;right:18px;z-index:2;
  background:rgba(255,255,255,.94);
  border-radius:var(--r-md);
  padding:14px 16px;
  font-size:13.5px;color:var(--muted);
  box-shadow:var(--sh-sm);
}
.hero-caption strong{display:block;color:var(--ink);font-size:15px;margin-bottom:2px}

/* ============ trust strip ============ */
.trust-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px}
.trust-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:18px 20px;box-shadow:var(--sh-sm);
  display:flex;align-items:center;gap:14px;
}
.trust-item i{font-size:20px;color:var(--teal)}
.trust-item b{display:block;font-size:16px}
.trust-item span{font-size:13px;color:var(--muted)}

/* ============ anchor bar ============ */
.anchor-bar{
  display:flex;gap:12px;overflow-x:auto;padding:14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-sm);scrollbar-width:thin;
}
.anchor-chip{
  display:inline-flex;align-items:center;gap:9px;flex:0 0 auto;
  padding:11px 18px;border-radius:var(--r-sm);
  background:var(--bg);border:1px solid var(--line);
  color:var(--brand-deep);font-size:14.5px;font-weight:600;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.anchor-chip i{color:var(--brand-2);font-size:14px}
.anchor-chip:hover{background:var(--brand-light);border-color:rgba(30,111,168,.4);transform:translateY(-2px)}

/* ============ content blocks ============ */
.content-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh);padding:34px;
}
.content-card + .content-card{margin-top:26px}
.block-title{display:flex;align-items:flex-start;gap:14px;margin-bottom:18px}
.block-title .idx{
  flex:0 0 44px;width:44px;height:44px;border-radius:13px;
  background:var(--brand-light);color:var(--brand-deep);
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;
}
.block-title h2{font-size:clamp(21px,2.4vw,27px);padding-top:6px}
.body-text{color:#26414F;font-size:16.5px}
.body-text strong{color:var(--brand-deep)}
.note-box{
  margin-top:22px;padding:18px 20px;
  background:var(--brand-light);
  border-left:4px solid var(--brand);
  border-radius:0 var(--r-md) var(--r-md) 0;
  font-size:14.5px;color:#1D4A63;
}
.check-list{list-style:none;padding:0;margin:20px 0 0}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-md);
  background:#FBFDFE;margin-bottom:12px;font-size:15.5px;
}
.check-list i{color:var(--teal);margin-top:5px}
.step-flow{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:22px}
.step-item{
  position:relative;padding:22px 22px 20px 24px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);
}
.step-item::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--brand) 0%,var(--teal) 100%);
}
.step-item h3{font-size:18px;margin-bottom:8px}
.step-item p{font-size:14.5px;color:var(--muted);margin:0}
.step-item .num{
  display:inline-block;font-size:12.5px;font-weight:800;color:var(--accent);
  letter-spacing:1px;margin-bottom:6px;
}
.compare-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:22px}
.compare-col{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh-sm);
}
.compare-col h3{font-size:18px;display:flex;align-items:center;gap:10px;margin-bottom:12px}
.compare-col h3 i{color:var(--brand-2)}
.compare-col ul{padding-left:18px;margin:0;font-size:15px;color:#2C4A59}
.tip-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
.tip-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh-sm);height:100%;
  transition:transform .2s ease,box-shadow .2s ease;
}
.tip-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg)}
.tip-card i{font-size:22px;color:var(--accent);margin-bottom:12px;display:block}
.tip-card h3{font-size:17px;margin-bottom:8px}
.tip-card p{font-size:14.5px;color:var(--muted);margin:0}

/* ============ faq ============ */
.faq-wrap{max-width:920px;margin:0 auto}
.accordion-item{
  border:1px solid var(--line) !important;
  border-radius:var(--r-md) !important;
  background:#fff;
  margin-bottom:14px;
  overflow:hidden;
  box-shadow:var(--sh-sm);
}
.accordion-button{
  font-size:16.5px;font-weight:700;color:var(--ink);
  padding:20px 22px;background:#fff;border-radius:var(--r-md) !important;
}
.accordion-button:not(.collapsed){background:var(--brand-light);color:var(--brand-deep);box-shadow:none}
.accordion-button:focus{box-shadow:none;border-color:transparent;outline:2px solid rgba(30,111,168,.3)}
.accordion-button::after{
  background-image:none;
  content:"\2b";
  font-family:"Font Awesome 6 Free";font-weight:900;
  transform:none;width:auto;height:auto;
  color:var(--brand);font-size:15px;line-height:1;
}
.accordion-button:not(.collapsed)::after{content:"\f068";color:var(--brand-deep)}
.accordion-body{font-size:15px;color:#31505F;line-height:1.8;padding:0 22px 22px}

/* ============ cta ============ */
.cta-band{
  background:linear-gradient(135deg,var(--brand-light) 0%,#F4FAFE 60%,rgba(20,184,166,.10) 100%);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:44px;
  box-shadow:var(--sh-sm);
}
.cta-band h2{font-size:clamp(23px,2.8vw,31px);margin-bottom:12px}
.cta-band p{color:#2C4A59;max-width:640px}
.cta-form{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px;max-width:520px}
.cta-form .form-control{
  flex:1 1 240px;height:48px;border-radius:var(--r-sm);
  border:1px solid var(--line);font-size:15px;padding:0 16px;
}
.cta-form .form-control:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(30,111,168,.14)}
.cta-hint{font-size:13px;color:var(--muted);margin-top:10px}

/* ============ entry cards ============ */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.entry-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh);
  display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg)}
.entry-card .thumb{aspect-ratio:16/9;overflow:hidden;background:#E3EDF4}
.entry-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.entry-card:hover .thumb img{transform:scale(1.05)}
.entry-card .body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.entry-card h3{font-size:19px}
.entry-card p{font-size:14.5px;color:var(--muted);margin:0;flex:1}

/* ============ footer ============ */
.site-footer{
  margin-top:72px;padding:64px 0 28px;
  background:#0F2A3B;color:#C6D6E1;
}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:16px;letter-spacing:.4px}
.site-footer .brand{color:#fff;margin-bottom:16px}
.site-footer .brand-text{color:#fff}
.footer-desc{font-size:14px;color:#9DB4C4;line-height:1.8;max-width:340px}
.footer-link{display:block;color:#9DB4C4;font-size:14px;margin-bottom:10px}
.footer-link:hover{color:#fff}
.footer-form .form-control{
  height:48px;border-radius:var(--r-sm);border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);color:#fff;font-size:15px;padding:0 16px;
}
.footer-form .form-control::placeholder{color:#8AA3B4}
.footer-form .form-control:focus{background:rgba(255,255,255,.1);border-color:var(--brand-2);box-shadow:0 0 0 4px rgba(46,139,192,.2);color:#fff}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:#8AA3B4;
}
.footer-bottom a{color:#C6D6E1}
.footer-bottom a:hover{color:#fff}

/* ============ responsive ============ */
@media (max-width:1199.98px){
  .container{max-width:100%}
  .hero-grid{gap:32px}
}
@media (max-width:991.98px){
  .nav-desktop{display:none}
  .nav-cta-desktop{display:none}
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .hero-figure{order:-1}
  .trust-strip{grid-template-columns:repeat(2,1fr)}
  .step-flow{grid-template-columns:1fr}
  .tip-grid{grid-template-columns:repeat(2,1fr)}
  .entry-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:60px 0}
}
@media (max-width:767.98px){
  body{font-size:15.5px}
  .nav-shell{gap:10px;padding:10px 12px;min-height:64px}
  .brand-text{font-size:16px}
  .content-card{padding:24px}
  .compare-grid{grid-template-columns:1fr}
  .cta-band{padding:28px 22px}
  .tip-grid{grid-template-columns:1fr}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px}
  .hero-actions{gap:10px}
  .hero-actions .btn{width:100%}
  .trust-strip{grid-template-columns:1fr}
  .entry-grid{grid-template-columns:1fr}
  .mobile-grid{grid-template-columns:1fr}
  .section{padding:48px 0}
  .block-title{gap:12px}
  .block-title .idx{flex:0 0 38px;width:38px;height:38px;font-size:15px}
  .anchor-bar{padding:12px}
}

/* roulang page: category2 */
:root{
  --brand:#1E6FA8;
  --brand-2:#2E8BC0;
  --brand-dark:#155E85;
  --brand-light:#E8F4FB;
  --accent:#F97316;
  --teal:#14B8A6;
  --bg:#F5F9FC;
  --surface:#FFFFFF;
  --ink:#102A3A;
  --muted:#5B7285;
  --line:#D9E5EE;
  --radius:18px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow:0 8px 24px rgba(16,42,58,.08);
  --shadow-lg:0 16px 36px rgba(16,42,58,.14);
  --ease:200ms ease;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand-dark)}
button,input{font-family:inherit}
:focus-visible{outline:3px solid rgba(46,139,192,.4);outline-offset:2px}
.container{max-width:1220px;padding-left:20px;padding-right:20px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  padding:12px 0;
  background:rgba(245,249,252,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(217,229,238,.7);
}
.nav-shell{
  display:flex;align-items:center;gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:0 6px 20px rgba(16,42,58,.06);
  padding:10px 16px;
  min-height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;display:inline-flex;align-items:center;justify-content:center;
  font-size:17px;box-shadow:0 6px 14px rgba(30,111,168,.28);
}
.brand-text{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:.2px;white-space:nowrap}
.brand:hover .brand-text{color:var(--brand-dark)}
.nav-desktop{
  display:flex;align-items:center;gap:8px;
  flex:1 1 auto;min-width:0;
  overflow-x:auto;scrollbar-width:none;
}
.nav-desktop::-webkit-scrollbar{display:none}
.nav-chip{
  display:inline-flex;align-items:center;gap:8px;
  height:46px;padding:0 15px;border-radius:var(--radius-sm);
  font-size:14.5px;font-weight:500;color:var(--muted);
  white-space:nowrap;border:1px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease);
}
.nav-chip i{font-size:14px;color:var(--brand-2)}
.nav-chip:hover{background:var(--brand-light);color:var(--brand-dark);transform:translateY(-1px)}
.nav-chip.active{
  background:var(--brand-light);color:var(--brand-dark);font-weight:700;
  border-color:rgba(30,111,168,.3);
}
.nav-chip.active i{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle{
  width:46px;height:46px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:#fff;color:var(--brand-dark);
  font-size:17px;display:inline-flex;align-items:center;justify-content:center;
  transition:background var(--ease),border-color var(--ease);
}
.nav-toggle:hover{background:var(--brand-light);border-color:rgba(30,111,168,.35)}
.mobile-panel{
  margin-top:12px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:16px;
}
.mobile-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
.mobile-grid .nav-chip{height:52px;justify-content:flex-start;background:#F7FBFD;border-color:var(--line)}

/* ---------- 按钮 ---------- */
.btn{border-radius:var(--radius-sm);font-weight:600;transition:all var(--ease);border:1px solid transparent}
.btn-brand{background:var(--brand);color:#fff;padding:11px 20px;font-size:15px}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(21,94,133,.24)}
.btn-brand:active{transform:translateY(0);background:var(--brand-dark)}
.btn-ghost{background:#fff;color:var(--brand);border-color:rgba(30,111,168,.42);padding:11px 20px;font-size:15px}
.btn-ghost:hover{background:var(--brand-light);color:var(--brand-dark);border-color:var(--brand)}
.btn-accent{background:var(--accent);color:#fff;padding:11px 20px;font-size:15px}
.btn-accent:hover{background:#e2650d;color:#fff;transform:translateY(-1px)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{display:block;width:100%;text-align:center}

/* ---------- 通用标签/徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--brand-light);color:var(--brand-dark);
  border-radius:var(--radius-pill);padding:5px 13px;
  font-size:12.5px;font-weight:600;line-height:1.6;
}
.tag-teal{background:rgba(20,184,166,.12);color:#0E8577}
.tag-orange{background:rgba(249,115,22,.12);color:#C2560B}

/* ---------- 顶部横幅 ---------- */
.page-banner{
  position:relative;
  padding:56px 0 64px;
  background-image:linear-gradient(115deg,rgba(232,244,251,.96) 0%,rgba(245,249,252,.88) 55%,rgba(245,249,252,.94) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:22px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#9CB2C2}
.crumb .current{color:var(--ink);font-weight:600}
.page-banner h1{
  font-size:clamp(30px,4.2vw,46px);line-height:1.3;font-weight:800;
  margin:14px 0 16px;letter-spacing:-.5px;
}
.banner-sub{font-size:17px;line-height:1.85;color:var(--muted);max-width:620px;margin-bottom:26px}
.banner-actions{display:flex;flex-wrap:wrap;gap:12px}
.banner-figure{position:relative}
.banner-img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--radius);box-shadow:var(--shadow-lg);border:1px solid #fff;
}
.banner-figure::after{
  content:"";position:absolute;inset:0;border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(30,111,168,.06),rgba(30,111,168,.18));
  pointer-events:none;
}

/* ---------- 板块 ---------- */
.section{padding:76px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:38px}
.section-head h2{
  font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.32;margin:12px 0 12px;letter-spacing:-.3px;
}
.section-head p{color:var(--muted);font-size:16px;margin:0}

/* ---------- 卡片 ---------- */
.card-soft{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px;height:100%;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card-soft:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#C7DAE8}
.card-icon{
  width:46px;height:46px;border-radius:14px;
  background:var(--brand-light);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;font-size:19px;
  margin-bottom:16px;
}
.card-soft h3{font-size:19px;font-weight:700;margin:0 0 10px;line-height:1.45}
.card-soft p{color:var(--muted);font-size:14.5px;line-height:1.8;margin:0 0 12px}
.card-link{font-size:14.5px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.card-link i{font-size:12px;transition:transform var(--ease)}
.card-link:hover i{transform:translateX(3px)}

/* ---------- 目录卡片 ---------- */
.dir-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.dir-card{
  display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:24px 22px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.dir-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(30,111,168,.35)}
.dir-card .dir-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.dir-card .dir-idx{
  font-size:12.5px;font-weight:700;color:var(--brand);background:var(--brand-light);
  border-radius:var(--radius-pill);padding:4px 11px;
}
.dir-card h3{font-size:17.5px;font-weight:700;margin:0 0 8px;color:var(--ink)}
.dir-card p{font-size:14px;color:var(--muted);margin:0;line-height:1.75}

/* ---------- 两栏正文 + 侧栏 ---------- */
.content-article h2{
  font-size:clamp(22px,2.4vw,28px);font-weight:800;line-height:1.35;
  margin:46px 0 16px;scroll-margin-top:110px;
}
.content-article h2:first-child{margin-top:0}
.content-article p{color:#2A4557;font-size:16.5px;line-height:1.85;margin:0 0 16px}
.content-article ul{margin:0 0 18px;padding-left:0;list-style:none}
.content-article ul li{
  position:relative;padding-left:28px;margin-bottom:12px;color:#2A4557;font-size:16px;line-height:1.8;
}
.content-article ul li::before{
  content:"\f111";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;left:6px;top:2px;font-size:7px;color:var(--brand-2);
}
.hl-box{
  background:var(--brand-light);border-left:4px solid var(--brand);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:18px 22px;margin:0 0 22px;color:var(--brand-dark);font-size:15.5px;line-height:1.8;
}
.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:0 0 26px}
.mini-card{
  background:#F8FBFD;border:1px solid var(--line);border-radius:14px;padding:16px 18px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.mini-card:hover{border-color:rgba(30,111,168,.35);box-shadow:var(--shadow)}
.mini-card .mini-k{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px}
.mini-card .mini-v{font-size:17px;font-weight:700;color:var(--brand-dark)}

.sticky-card{
  position:sticky;top:100px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;
}
.sticky-card h3{font-size:18px;font-weight:700;margin:0 0 14px}
.sticky-list{list-style:none;margin:0 0 20px;padding:0}
.sticky-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14.5px;color:var(--muted);line-height:1.75;
  padding:10px 0;border-bottom:1px dashed var(--line);
}
.sticky-list li:last-child{border-bottom:none}
.sticky-list i{color:var(--teal);font-size:13px;margin-top:5px}

/* ---------- 看点卡 ---------- */
.spot-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;height:100%;
  transition:transform var(--ease),box-shadow var(--ease);
}
.spot-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.spot-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.spot-body{padding:22px 24px 24px}
.spot-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.spot-meta .time{font-size:13px;color:var(--muted)}
.spot-body h3{font-size:19px;font-weight:700;line-height:1.45;margin:0 0 10px}
.spot-body p{font-size:14.5px;color:var(--muted);line-height:1.78;margin:0 0 14px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;margin:0 auto}
.accordion-item{
  border:1px solid var(--line);border-radius:14px;overflow:hidden;
  margin-bottom:14px;background:var(--surface);box-shadow:0 4px 14px rgba(16,42,58,.04);
}
.accordion-button{
  font-size:17px;font-weight:700;color:var(--ink);background:var(--surface);
  padding:18px 22px;line-height:1.55;
}
.accordion-button:not(.collapsed){background:var(--brand-light);color:var(--brand-dark);box-shadow:none}
.accordion-button:focus{box-shadow:0 0 0 3px rgba(46,139,192,.22)}
.accordion-button::after{
  background-image:none;content:"\2b";font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:14px;color:var(--brand);width:auto;height:auto;
  display:flex;align-items:center;justify-content:center;
  transition:transform var(--ease);
}
.accordion-button:not(.collapsed)::after{content:"\f068";transform:none}
.accordion-body{padding:2px 22px 22px;font-size:15px;line-height:1.85;color:var(--muted)}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(120deg,#E8F4FB 0%,#F7FBFD 100%);
  border:1px solid var(--line);border-radius:22px;
  padding:48px 44px;box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(24px,3vw,32px);font-weight:800;line-height:1.35;margin:0 0 14px}
.cta-band p{color:var(--muted);font-size:16px;max-width:640px;margin:0 0 26px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-note{font-size:13px;color:var(--muted);margin-top:16px}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#0F2A3D;color:#C6D8E4;padding:64px 0 26px;margin-top:0;
}
.site-footer .brand-text{color:#fff}
.site-footer .brand-mark{background:linear-gradient(135deg,var(--brand-2),var(--teal))}
.footer-desc{font-size:14.5px;line-height:1.85;color:#9FBACB;margin:16px 0 0;max-width:360px}
.site-footer h4{font-size:15.5px;font-weight:700;color:#fff;margin:0 0 18px}
.footer-link{display:block;font-size:14.5px;color:#9FBACB;padding:6px 0;transition:color var(--ease),transform var(--ease)}
.footer-link:hover{color:#fff;transform:translateX(3px)}
.footer-form{margin-top:4px}
.site-footer .form-control{
  height:48px;border-radius:var(--radius-sm);border:1px solid rgba(198,216,228,.28);
  background:rgba(255,255,255,.06);color:#fff;font-size:14.5px;padding:0 14px;
}
.site-footer .form-control::placeholder{color:#87A4B6}
.site-footer .form-control:focus{
  background:rgba(255,255,255,.1);border-color:var(--brand-2);
  box-shadow:0 0 0 3px rgba(46,139,192,.28);color:#fff;
}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(198,216,228,.16);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13.5px;color:#87A4B6;
}
.footer-bottom a{color:#C6D8E4}
.footer-bottom a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .container{max-width:1080px}
  .dir-grid{gap:18px}
}
@media (max-width:991.98px){
  .nav-desktop{display:none}
  .nav-shell{gap:12px}
  .section{padding:60px 0}
  .page-banner{padding:44px 0 52px}
  .sticky-card{position:static;margin-top:34px}
  .dir-grid{grid-template-columns:repeat(2,1fr)}
  .banner-figure{margin-top:8px}
  .cta-band{padding:38px 28px}
}
@media (max-width:767.98px){
  .section{padding:52px 0}
  .mini-grid{grid-template-columns:1fr}
  .banner-sub{font-size:16px}
  .banner-actions .btn{width:100%}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px}
  .nav-shell{padding:8px 12px;min-height:62px;border-radius:16px}
  .brand-text{font-size:15.5px}
  .dir-grid{grid-template-columns:1fr}
  .card-soft,.sticky-card{padding:20px}
  .mobile-grid{grid-template-columns:1fr}
  .cta-band{padding:30px 20px;border-radius:18px}
  .section-head h2{font-size:23px}
}

/* roulang page: category3 */
:root{
  --brand:#1E6FA8;
  --brand-2:#2E8BC0;
  --brand-dark:#155E85;
  --brand-soft:#E8F4FB;
  --orange:#F97316;
  --teal:#14B8A6;
  --bg:#F5F9FC;
  --white:#FFFFFF;
  --ink:#102A3A;
  --muted:#5B7285;
  --line:#D9E5EE;
  --r-xl:22px;
  --r-lg:18px;
  --r-md:12px;
  --shadow:0 8px 24px rgba(16,42,58,.08);
  --shadow-lg:0 16px 36px rgba(16,42,58,.14);
  --sec-pad:88px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-dark);}
button,input{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink);font-weight:800;line-height:1.3;margin:0;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}

.container{max-width:1220px;padding-left:20px;padding-right:20px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(245,249,252,.92);
  backdrop-filter:blur(10px);
  padding-bottom:12px;
}
.nav-shell{
  display:flex;
  align-items:center;
  gap:16px;
  padding:10px 14px;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:0 6px 20px rgba(16,42,58,.06);
  margin-top:14px;
  min-height:72px;
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand-2),var(--brand-dark));
  color:#fff;font-size:18px;
  box-shadow:0 6px 14px rgba(30,111,168,.28);
}
.brand-text{font-size:18px;font-weight:800;color:var(--ink);letter-spacing:.2px;white-space:nowrap;}
.brand:hover .brand-text{color:var(--brand-dark);}
.nav-desktop{
  display:flex;align-items:center;gap:6px;
  margin-left:auto;
  overflow-x:auto;
  scrollbar-width:none;
}
.nav-desktop::-webkit-scrollbar{display:none;}
.nav-chip{
  display:inline-flex;align-items:center;gap:8px;
  height:46px;padding:0 15px;
  border-radius:12px;
  font-size:14px;font-weight:600;
  color:var(--muted);
  background:transparent;
  border:1px solid transparent;
  white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.nav-chip i{font-size:15px;color:var(--brand-2);}
.nav-chip:hover{background:var(--brand-soft);color:var(--brand-dark);}
.nav-chip.active{
  background:var(--brand-soft);
  color:var(--brand-dark);
  border-color:rgba(30,111,168,.32);
}
.nav-chip:focus-visible{outline:3px solid rgba(46,139,192,.35);outline-offset:2px;}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.nav-toggle{
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:var(--white);
  color:var(--brand);font-size:17px;
  display:inline-flex;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--brand-soft);}
.mobile-panel{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:14px;
  margin-top:10px;
  box-shadow:var(--shadow);
}
.mobile-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:12px;}
.mobile-grid .nav-chip{justify-content:flex-start;background:var(--bg);}

/* ============ 按钮 ============ */
.btn{border-radius:var(--r-md);font-weight:600;font-size:15px;padding:11px 22px;border:1px solid transparent;transition:all .2s ease;}
.btn:focus-visible{outline:3px solid rgba(46,139,192,.4);outline-offset:2px;box-shadow:none;}
.btn-brand{background:var(--brand);border-color:var(--brand);color:#fff;}
.btn-brand:hover,.btn-brand:active{background:var(--orange);border-color:var(--orange);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:var(--white);border-color:var(--brand);color:var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand-dark);color:var(--brand-dark);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-block{display:block;width:100%;}

/* ============ 面包屑 ============ */
.crumb-bar{padding:26px 0 0;}
.crumb{font-size:13.5px;color:var(--muted);display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#AFC3D2;}
.crumb .now{color:var(--ink);font-weight:600;}

/* ============ Hero ============ */
.hero{padding:26px 0 0;}
.hero-panel{
  position:relative;
  overflow:hidden;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:40px;
  align-items:center;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  box-shadow:var(--shadow);
  padding:44px;
}
.hero-panel::after{
  content:"";
  position:absolute;right:-120px;bottom:-140px;
  width:420px;height:420px;border-radius:50%;
  border:2px dashed rgba(30,111,168,.09);
  pointer-events:none;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand-soft);color:var(--brand-dark);
  border-radius:999px;padding:6px 14px;font-size:13px;font-weight:600;
  margin-bottom:18px;
}
.hero h1{font-size:clamp(30px,4.2vw,46px);letter-spacing:-.4px;}
.hero-sub{margin-top:16px;font-size:17px;color:var(--muted);max-width:560px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);}
.hero-media img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-lg);}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(30,111,168,.06),rgba(21,94,133,.28));
  border-radius:var(--r-lg);
}
.hero-stat{
  position:absolute;left:16px;bottom:16px;right:16px;
  background:rgba(255,255,255,.94);
  border-radius:14px;padding:12px 16px;
  display:flex;align-items:center;gap:12px;
  font-size:13.5px;color:var(--brand-dark);font-weight:600;
}
.hero-stat i{color:var(--teal);font-size:16px;}

/* ============ 通用板块 ============ */
.section{padding-top:var(--sec-pad);}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:5px 14px;margin-bottom:14px;
}
.section-head h2{font-size:clamp(24px,3vw,34px);}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px;}

.card-soft{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow);
  padding:26px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.card-soft:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}

/* ============ 信任条 ============ */
.trust-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.trust-item{
  background:var(--white);border:1px solid var(--line);border-radius:16px;
  padding:18px 20px;display:flex;align-items:center;gap:14px;
  box-shadow:0 6px 18px rgba(16,42,58,.05);
}
.trust-item i{
  width:42px;height:42px;border-radius:12px;flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:17px;
}
.trust-item strong{display:block;font-size:16px;line-height:1.4;}
.trust-item span{font-size:13px;color:var(--muted);}

/* ============ 锚点导航 ============ */
.anchor-bar{
  display:flex;gap:12px;flex-wrap:wrap;
  background:var(--white);border:1px solid var(--line);
  border-radius:16px;box-shadow:var(--shadow);
  padding:14px;margin-top:28px;
}
.anchor-item{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:14px;font-weight:600;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.anchor-item i{font-size:13px;}
.anchor-item:hover{background:var(--brand);color:#fff;transform:translateY(-2px);}

/* ============ 时间轴 ============ */
.tl{position:relative;padding-top:8px;}
.tl::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;
  transform:translateX(-1px);
  background:linear-gradient(180deg,rgba(30,111,168,.05),rgba(30,111,168,.32) 12%,rgba(20,184,166,.32) 88%,rgba(30,111,168,.05));
}
.tl-item{
  display:grid;
  grid-template-columns:1fr 64px 1fr;
  align-items:center;
  margin-bottom:30px;
}
.tl-item > *{grid-row:1;}
.tl-item:nth-child(odd) .tl-card{grid-column:1;}
.tl-item:nth-child(odd) .tl-node{grid-column:2;}
.tl-item:nth-child(even) .tl-card{grid-column:3;}
.tl-item:nth-child(even) .tl-node{grid-column:2;}
.tl-node{
  width:20px;height:20px;border-radius:50%;margin:0 auto;
  background:var(--brand);
  box-shadow:0 0 0 7px rgba(30,111,168,.12);
  position:relative;z-index:2;
}
.tl-item:nth-child(even) .tl-node{
  background:var(--orange);
  box-shadow:0 0 0 7px rgba(249,115,22,.14);
}
.tl-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow);
  padding:28px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.tl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.tl-tag{
  display:inline-block;
  background:var(--brand-soft);color:var(--brand-dark);
  border-radius:999px;padding:4px 12px;font-size:12.5px;font-weight:700;
  margin-bottom:14px;
}
.tl-item:nth-child(even) .tl-tag{background:#FFF1E7;color:#C2540C;}
.tl-card h3{font-size:21px;margin-bottom:12px;}
.tl-card p{color:var(--muted);font-size:15.5px;}
.tl-list{margin-top:16px;display:grid;gap:10px;}
.tl-list li{display:flex;gap:10px;font-size:15px;color:var(--ink);}
.tl-list li i{color:var(--teal);font-size:14px;margin-top:6px;}
.tl-img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:14px;margin-top:18px;}

/* ============ 提示条 ============ */
.notice-bar{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--white);
  border:1px solid var(--line);
  border-left:5px solid var(--teal);
  border-radius:16px;
  padding:22px 26px;
  box-shadow:var(--shadow);
}
.notice-bar i{color:var(--teal);font-size:20px;margin-top:4px;}
.notice-bar strong{display:block;font-size:16px;margin-bottom:6px;}
.notice-bar p{color:var(--muted);font-size:15px;}

/* ============ FAQ ============ */
.faq-wrap{max-width:920px;}
.accordion-item{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:14px !important;
  margin-bottom:14px;
  overflow:hidden;
  box-shadow:0 4px 14px rgba(16,42,58,.05);
}
.accordion-button{
  font-size:17px;font-weight:700;color:var(--ink);
  background:var(--white);
  padding:20px 24px;
  box-shadow:none !important;
}
.accordion-button:not(.collapsed){background:var(--brand-soft);color:var(--brand-dark);}
.accordion-button::after{
  background-image:none;
  content:"\f067";
  font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:14px;color:var(--brand);
  width:auto;height:auto;transform:none;
}
.accordion-button:not(.collapsed)::after{content:"\f068";color:var(--brand-dark);}
.accordion-body{padding:4px 24px 22px;color:var(--muted);font-size:15px;line-height:1.8;}

/* ============ 订阅 CTA ============ */
.cta-panel{
  background:linear-gradient(135deg,#EAF5FC 0%,#F7FBFE 60%,#EAF7F5 100%);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  padding:52px 44px;
  position:relative;
  overflow:hidden;
  box-shadow:var(--shadow);
}
.cta-panel::before{
  content:"";position:absolute;right:-80px;top:-80px;width:300px;height:300px;
  border-radius:50%;border:2px dashed rgba(30,111,168,.10);
}
.cta-panel h2{font-size:clamp(24px,3vw,32px);}
.cta-panel p{margin-top:14px;color:var(--muted);max-width:620px;}
.cta-form{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px;max-width:560px;}
.cta-form .form-control{
  flex:1 1 240px;height:48px;border-radius:var(--r-md);
  border:1px solid var(--line);font-size:15px;padding:0 16px;background:var(--white);
}
.cta-form .form-control:focus{
  border-color:var(--brand);box-shadow:0 0 0 4px rgba(46,139,192,.16);
}
.form-tip{font-size:13px;color:var(--muted);margin-top:12px;}
.form-tip.is-ok{color:#0E9F6E;}
.form-tip.is-err{color:#DC2626;}

/* ============ 相关入口 ============ */
.entry-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow);
  overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.entry-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:14px;margin:16px;width:calc(100% - 32px);}
.entry-body{padding:6px 22px 24px;}
.entry-body h3{font-size:19px;margin-bottom:10px;}
.entry-body p{color:var(--muted);font-size:14.5px;}
.entry-link{display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:14px;font-weight:600;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:var(--sec-pad);
  padding:64px 0 28px;
  background:var(--white);
  border-top:1px solid var(--line);
}
.site-footer h4{font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-desc{color:var(--muted);font-size:14.5px;margin-top:18px;max-width:340px;}
.footer-link{display:block;color:var(--muted);font-size:14px;padding:6px 0;}
.footer-link:hover{color:var(--brand);}
.footer-form{max-width:320px;}
.footer-form .form-control{
  height:46px;border-radius:var(--r-md);border:1px solid var(--line);
  font-size:14.5px;padding:0 14px;
}
.footer-form .form-control:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(46,139,192,.16);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--brand);}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  :root{--sec-pad:76px;}
  .hero-panel{padding:36px;gap:30px;}
}
@media (max-width:991.98px){
  :root{--sec-pad:64px;}
  .hero-panel{grid-template-columns:1fr;padding:30px;}
  .hero-media{order:-1;}
  .trust-row{grid-template-columns:repeat(2,1fr);}
  .tl::before{left:15px;}
  .tl-item{grid-template-columns:32px 1fr;margin-bottom:22px;}
  .tl-item:nth-child(odd) .tl-card,
  .tl-item:nth-child(even) .tl-card{grid-column:2;}
  .tl-item:nth-child(odd) .tl-node,
  .tl-item:nth-child(even) .tl-node{grid-column:1;}
  .tl-node{width:16px;height:16px;margin-top:34px;}
  .cta-panel{padding:38px 26px;}
}
@media (max-width:767.98px){
  :root{--sec-pad:52px;}
  body{font-size:15.5px;}
  .nav-shell{min-height:64px;padding:10px 12px;gap:10px;}
  .brand-text{font-size:16px;}
  .hero-panel{padding:24px;border-radius:18px;}
  .hero-sub{font-size:15.5px;}
  .hero-cta .btn{width:100%;}
  .trust-row{grid-template-columns:1fr;}
  .tl-card{padding:22px;}
  .tl-card h3{font-size:19px;}
  .cta-form .btn{width:100%;}
  .entry-card img{aspect-ratio:16/9;}
}
@media (max-width:519.98px){
  .container{padding-left:16px;padding-right:16px;}
  .mobile-grid{grid-template-columns:1fr;}
  .anchor-item{font-size:13px;padding:9px 14px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}