/* roulang page: index */
:root{
  --brand-900:#0B2E45;
  --brand-700:#12557A;
  --brand-500:#1C86B8;
  --brand-100:#E4F1F8;
  --ice-200:#CFEAF5;
  --accent-500:#FF7A29;
  --accent-600:#E8671A;
  --bg:#F7FAFC;
  --surface:#FFFFFF;
  --line:#E2EAF0;
  --text:#1D2A38;
  --text-muted:#5B6B7C;
  --radius-lg:14px;
  --radius-sm:10px;
  --radius-img:12px;
  --shadow-1:0 4px 12px rgba(11,46,69,.06);
  --shadow-2:0 12px 32px rgba(11,46,69,.10);
  --nav-h:64px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-bottom:88px;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--brand-500);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-700);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;color:var(--brand-900);}
h1{font-size:44px;}
h2{font-size:32px;}
h3{font-size:20px;font-weight:600;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(28,134,184,.35);outline-offset:2px;border-radius:4px;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--ice{background:var(--brand-100);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head__text{max-width:720px;}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--brand-500);margin-bottom:12px;}
.section-head h2{margin-bottom:10px;}
.section-head p{color:var(--text-muted);font-size:15px;}
.badge{display:inline-block;padding:4px 12px;font-size:13px;font-weight:600;color:var(--brand-700);background:var(--brand-100);border-radius:999px;line-height:1.6;}
.badge--accent{color:#fff;background:var(--accent-500);}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand-500);font-weight:600;font-size:15px;}
.link-arrow i{transition:transform .2s ease;}
.link-arrow:hover i{transform:translateX(4px);}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--radius-sm);font-size:16px;font-weight:600;border:1.5px solid transparent;cursor:pointer;transition:all .2s ease;line-height:1;}
.btn-primary{background:var(--accent-500);color:#fff;}
.btn-primary:hover{background:var(--accent-600);color:#fff;transform:translateY(-2px);}
.btn-ghost{background:transparent;border-color:var(--brand-500);color:var(--brand-500);}
.btn-ghost:hover{background:var(--brand-100);color:var(--brand-700);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-1);padding:24px;transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;}
.card:hover{box-shadow:var(--shadow-2);transform:translateY(-4px);border-color:rgba(28,134,184,.4);}
.media{position:relative;overflow:hidden;border-radius:var(--radius-img);background:var(--brand-100);}
.media img{width:100%;height:100%;object-fit:cover;}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease,height .2s ease;}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--nav-h);}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:var(--brand-900);letter-spacing:.01em;}
.logo:hover{color:var(--brand-700);}
.logo__mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:var(--brand-700);color:#fff;font-size:15px;font-weight:700;}
.logo__text span{color:var(--brand-500);}
.nav-menu{display:flex;align-items:center;gap:4px;}
.nav-menu a{position:relative;display:inline-block;padding:10px 14px;font-size:15px;color:var(--text);border-radius:8px;}
.nav-menu a::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--brand-500);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;}
.nav-menu a:hover{color:var(--brand-700);background:var(--brand-100);}
.nav-menu a.is-active{color:var(--brand-700);font-weight:600;}
.nav-menu a.is-active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-icon{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-sm);border:1px solid var(--line);background:#fff;color:var(--brand-700);cursor:pointer;transition:all .2s ease;}
.nav-icon:hover{border-color:var(--brand-500);background:var(--brand-100);}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--radius-sm);border:1px solid var(--line);background:#fff;color:var(--brand-900);font-size:18px;cursor:pointer;}
.drawer-mask{position:fixed;inset:0;background:rgba(11,46,69,.45);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:80;}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(84vw,340px);background:#fff;z-index:90;padding:24px;transform:translateX(100%);transition:transform .28s ease;display:flex;flex-direction:column;gap:8px;overflow-y:auto;box-shadow:var(--shadow-2);}
.drawer.is-open{transform:translateX(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.drawer__close{width:40px;height:40px;border-radius:var(--radius-sm);border:1px solid var(--line);background:#fff;color:var(--brand-900);font-size:18px;cursor:pointer;}
.drawer nav a{display:block;padding:14px 12px;border-radius:var(--radius-sm);color:var(--text);font-size:16px;border-bottom:1px solid var(--line);}
.drawer nav a:hover{background:var(--brand-100);color:var(--brand-700);}
.drawer nav a.is-active{color:var(--brand-700);font-weight:600;background:var(--brand-100);}
.drawer .btn{margin-top:16px;width:100%;}

/* ---------- hero ---------- */
.hero{padding:calc(var(--nav-h) + 56px) 0 88px;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);}
.hero__title{font-size:44px;margin-bottom:20px;}
.hero__title .hl{color:var(--brand-500);}
.hero__sub{font-size:18px;color:var(--text-muted);max-width:520px;margin-bottom:32px;}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px;}
.trust-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--text-muted);}
.trust-row .dot{width:4px;height:4px;border-radius:50%;background:var(--ice-200);}
.hero__media{position:relative;}
.hero__media .media{aspect-ratio:16/10;border-radius:16px;box-shadow:var(--shadow-2);}
.float-card{position:absolute;right:-8px;bottom:-24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-2);padding:18px 20px;min-width:210px;}
.float-card__label{font-size:13px;color:var(--text-muted);margin-bottom:6px;}
.float-card__value{font-size:26px;font-weight:700;color:var(--brand-700);line-height:1.2;}
.float-card__foot{font-size:13px;color:var(--brand-500);margin-top:6px;}

/* ---------- features ---------- */
.feature-main{display:flex;flex-direction:column;gap:18px;height:100%;}
.feature-main .media{aspect-ratio:16/9;}
.feature-main ul{display:flex;flex-direction:column;gap:10px;margin-top:6px;}
.feature-main li{position:relative;padding-left:20px;font-size:15px;color:var(--text-muted);}
.feature-main li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--brand-500);}
.side-card{display:flex;flex-direction:column;gap:12px;height:100%;}
.num-mark{display:flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:10px;background:var(--brand-100);color:var(--brand-700);font-weight:700;font-size:15px;}
.side-card--alt .num-mark{background:rgba(255,122,41,.12);color:var(--accent-600);}
.side-card h3{margin-top:2px;}
.side-card p{font-size:15px;color:var(--text-muted);}

/* ---------- categories ---------- */
.cat-grid .card{height:100%;display:flex;flex-direction:column;gap:12px;}
.cat-grid .cat-icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;background:var(--brand-100);color:var(--brand-700);font-size:18px;}
.cat-grid .card:nth-child(2n) .cat-icon{background:rgba(255,122,41,.12);color:var(--accent-600);}
.cat-grid p{font-size:15px;color:var(--text-muted);}
.cat-grid .link-arrow{margin-top:auto;}

/* ---------- scenes ---------- */
.scene-row{align-items:center;margin-bottom:64px;}
.scene-row:last-child{margin-bottom:0;}
.scene-row .media{aspect-ratio:4/3;}
.scene-text h2{margin-bottom:16px;}
.scene-text p{color:var(--text-muted);margin-bottom:16px;}
.scene-tag{display:inline-block;font-size:13px;font-weight:600;color:var(--brand-700);background:var(--brand-100);border-radius:999px;padding:4px 12px;margin-bottom:14px;}

/* ---------- news ---------- */
.news-lead{display:flex;gap:24px;align-items:stretch;padding:24px;margin-bottom:24px;}
.news-lead .media{flex:0 0 320px;aspect-ratio:16/10;}
.news-lead__body{display:flex;flex-direction:column;gap:12px;}
.news-lead h3{font-size:22px;}
.news-card{display:flex;flex-direction:column;gap:12px;height:100%;}
.news-card .media{aspect-ratio:16/9;}
.news-card h3{font-size:18px;}
.clamp2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-muted);margin-top:auto;}
.card-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--ice-200);}
.empty-state{text-align:center;padding:64px 24px;background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius-lg);}
.empty-state i{font-size:32px;color:var(--brand-500);}
.empty-state p{margin:16px 0 24px;color:var(--text-muted);}

/* ---------- proof ---------- */
.proof-wrap{position:relative;}
.proof-scroll{display:flex;gap:24px;overflow-x:auto;scroll-behavior:smooth;padding:8px 4px 24px;scrollbar-width:none;}
.proof-scroll::-webkit-scrollbar{display:none;}
.proof-card{flex:0 0 300px;display:flex;flex-direction:column;gap:12px;}
.proof-card .rating{display:flex;gap:4px;color:var(--accent-500);font-size:14px;}
.proof-card p{font-size:15px;color:var(--text-muted);}
.proof-arrows{display:flex;gap:10px;}
.stats-grid{margin-top:24px;}
.stat{padding:28px 24px;border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-1);height:100%;}
.stat--main{background:var(--brand-900);border-color:var(--brand-900);}
.stat--main .stat__num,.stat--main .stat__label{color:#fff;}
.stat--main .stat__desc{color:rgba(255,255,255,.72);}
.stat__num{font-size:34px;font-weight:700;color:var(--brand-700);line-height:1.2;}
.stat__label{font-size:15px;font-weight:600;margin-top:6px;color:var(--brand-900);}
.stat__desc{font-size:14px;color:var(--text-muted);margin-top:8px;}

/* ---------- faq ---------- */
.faq-side p{color:var(--text-muted);font-size:15px;margin-top:12px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-1);overflow:hidden;transition:border-color .2s ease;}
.faq-item.is-open{border-color:rgba(28,134,184,.4);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;background:none;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--brand-900);cursor:pointer;}
.faq-q i{flex:0 0 auto;color:var(--brand-500);transition:transform .2s ease;}
.faq-item.is-open .faq-q i{transform:rotate(45deg);color:var(--accent-500);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;}
.faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--text-muted);}

/* ---------- cta ---------- */
.cta-band{background:var(--brand-100);padding:80px 0;text-align:center;}
.cta-band h2{margin-bottom:14px;}
.cta-band p{color:var(--text-muted);max-width:620px;margin:0 auto 28px;}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.78);padding:72px 0 0;}
.site-footer h3{color:#fff;font-size:16px;margin-bottom:18px;}
.footer-brand .logo{color:#fff;}
.footer-brand .logo__mark{background:var(--brand-500);}
.footer-brand .logo__text span{color:var(--ice-200);}
.footer-brand p{font-size:14px;margin-top:16px;color:rgba(255,255,255,.7);}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{color:rgba(255,255,255,.78);font-size:14px;}
.footer-links a:hover{color:var(--ice-200);}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:14px;}
.footer-contact span i{color:var(--ice-200);margin-right:8px;}
.footer-bottom{margin-top:56px;border-top:1px solid rgba(255,255,255,.15);padding:24px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6);}

/* ---------- sticky bar ---------- */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:70;height:64px;background:#fff;box-shadow:0 -8px 24px rgba(11,46,69,.12);transform:translateY(110%);opacity:0;transition:transform .3s ease,opacity .3s ease;}
.sticky-cta.is-visible{transform:translateY(0);opacity:1;}
.sticky-cta__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px;}
.sticky-cta__text{font-size:14px;color:var(--text-muted);}
.sticky-cta__text strong{color:var(--brand-900);}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}

@media screen and (max-width:1199px){
  .container{padding:0 24px;}
}
@media screen and (max-width:991px){
  h1,.hero__title{font-size:36px;}
  h2{font-size:26px;}
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .nav-menu{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .hero{padding:calc(var(--nav-h) + 36px) 0 64px;}
  .hero__media{margin-top:40px;}
  .float-card{right:12px;bottom:-18px;}
  .scene-row{margin-bottom:48px;}
  .news-lead{flex-direction:column;}
  .news-lead .media{flex:0 0 auto;width:100%;}
}
@media screen and (max-width:767px){
  body{font-size:15px;}
  h1,.hero__title{font-size:28px;}
  h2{font-size:22px;}
  h3{font-size:18px;}
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .hero__actions .btn{width:100%;}
  .float-card{position:static;margin-top:16px;min-width:0;}
  .sticky-cta__text{display:none;}
  .sticky-cta__inner{justify-content:center;}
  .sticky-cta .btn{width:100%;}
  .footer-bottom{flex-direction:column;}
}
@media screen and (max-width:575px){
  .proof-card{flex:0 0 82%;}
  .faq-q{font-size:15px;padding:16px;}
  .stat__num{font-size:28px;}
}

/* roulang page: article */
:root{
  --brand-900:#0B2E45;
  --brand-700:#12557A;
  --brand-500:#1C86B8;
  --brand-100:#E4F1F8;
  --ice-200:#CFEAF5;
  --accent-500:#FF7A29;
  --accent-600:#E8671A;
  --bg:#F7FAFC;
  --surface:#FFFFFF;
  --line:#E2EAF0;
  --text:#1D2A38;
  --text-muted:#5B6B7C;
  --shadow-1:0 4px 12px rgba(11,46,69,.06);
  --shadow-2:0 12px 32px rgba(11,46,69,.10);
  --radius-l:14px;
  --radius-m:12px;
  --radius-s:10px;
  --container:1200px;
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  padding-bottom:64px;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-m)}
a{color:var(--brand-500);text-decoration:none;transition:color 200ms ease,border-color 200ms ease,background 200ms ease}
a:hover{color:var(--brand-700)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(28,134,184,.35);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{margin:0;line-height:1.25;color:var(--brand-900);font-weight:700}
p{margin:0}
ul,ol{margin:0;padding-left:20px}
button{font-family:inherit;cursor:pointer}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%}
.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-margin-x>.cell{padding-left:12px;padding-right:12px}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow 200ms ease,background 200ms ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--nav-h);transition:height 200ms ease}
.site-header.is-scrolled .nav-inner{height:58px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--brand-900);font-weight:700;font-size:19px;letter-spacing:.2px}
.logo:hover{color:var(--brand-900)}
.logo__mark{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-700);color:#fff;font-size:13px;font-weight:700;letter-spacing:.5px;flex:0 0 auto;
}
.logo__text span{color:var(--brand-500)}
.nav-menu{display:flex;align-items:center;gap:26px}
.nav-menu a{
  position:relative;font-size:15px;font-weight:600;color:var(--text-muted);padding:6px 0;
}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand-500);
  transform:scaleX(0);transform-origin:left;transition:transform 200ms ease;
}
.nav-menu a:hover{color:var(--brand-700)}
.nav-menu a:hover::after,.nav-menu a.is-active::after{transform:scaleX(1)}
.nav-menu a.is-active{color:var(--brand-700)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-icon{
  width:40px;height:40px;border-radius:var(--radius-s);border:1px solid var(--line);background:var(--surface);
  color:var(--brand-700);display:inline-flex;align-items:center;justify-content:center;
  transition:background 200ms ease,border-color 200ms ease;
}
.nav-icon:hover{background:var(--brand-100);border-color:rgba(28,134,184,.4)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:var(--radius-s);border:1px solid var(--line);
  background:var(--surface);color:var(--brand-700);
}
.nav-overlay{
  position:fixed;inset:0;background:rgba(11,46,69,.45);opacity:0;visibility:hidden;
  transition:opacity 200ms ease,visibility 200ms ease;z-index:70;
}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-s);font-size:15px;font-weight:600;
  border:1.5px solid transparent;transition:all 200ms ease;white-space:nowrap;
}
.btn-primary{background:var(--accent-500);color:#fff;border-color:var(--accent-500)}
.btn-primary:hover{background:var(--accent-600);border-color:var(--accent-600);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--brand-700);border-color:var(--brand-500)}
.btn-ghost:hover{background:var(--brand-100);color:var(--brand-700)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;color:var(--brand-500)}
.link-more i{transition:transform 200ms ease;font-size:12px}
.link-more:hover i{transform:translateX(4px)}

/* ============ Badge / Breadcrumb ============ */
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-700);font-size:13px;font-weight:600;
}
.breadcrumb{font-size:13px;color:var(--text-muted);display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--brand-500)}
.breadcrumb .sep{color:#B9C7D3}
.breadcrumb .current{color:var(--brand-500);font-weight:700}

/* ============ Article hero ============ */
.site-main{padding-top:40px}
.article-hero{padding:8px 0 32px;border-bottom:1px solid var(--line)}
.article-title{font-size:44px;margin:16px 0 0;letter-spacing:-.2px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:18px;color:var(--text-muted);font-size:13px}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C3D2DD;display:inline-block}
.article-meta time{color:var(--text-muted)}

/* ============ Article layout ============ */
.article-wrap{padding:40px 0 72px}
.article-main{max-width:760px}
.article-lead{
  font-size:18px;color:var(--brand-700);border-left:4px solid var(--brand-500);
  padding:6px 0 6px 18px;line-height:1.8;margin-bottom:28px;
}
.article-body{font-size:16px;line-height:1.9;color:var(--text)}
.article-body h2{
  font-size:32px;margin:40px 0 16px;padding-left:14px;border-left:4px solid var(--brand-500);
}
.article-body h3{font-size:20px;margin:32px 0 12px;color:var(--brand-700)}
.article-body h4{font-size:17px;margin:24px 0 10px;color:var(--brand-700);font-weight:600}
.article-body p{margin:0 0 20px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px}
.article-body li{margin-bottom:10px}
.article-body ul li::marker{color:var(--brand-500)}
.article-body ol li::marker{color:var(--brand-500);font-weight:700}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;background:var(--brand-100);border-left:3px solid var(--accent-500);
  border-radius:0 var(--radius-m) var(--radius-m) 0;color:var(--brand-900);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{margin:24px auto;border-radius:var(--radius-m)}
.article-body a{color:var(--brand-500);border-bottom:1px solid rgba(28,134,184,.35)}
.article-body a:hover{color:var(--brand-700);border-bottom-color:var(--brand-700)}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;border:1px solid var(--line)}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.article-body thead th{background:var(--brand-100);color:var(--brand-900);font-weight:600}
.article-body tbody tr:nth-child(even){background:#FAFCFE}
.article-body code{background:var(--brand-100);padding:2px 6px;border-radius:6px;font-size:14px;color:var(--brand-700)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* inline promo */
.inline-promo{
  margin:40px 0 0;padding:24px;border:1px solid var(--line);border-radius:var(--radius-l);
  background:linear-gradient(0deg,#FFFFFF,#F8FCFE);box-shadow:var(--shadow-1);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.inline-promo h3{font-size:19px;margin-bottom:6px}
.inline-promo p{color:var(--text-muted);font-size:14px;margin:0}

/* back entry */
.back-entry{
  margin-top:36px;padding-top:24px;border-top:1px dashed var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
}

/* empty state */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius-l);background:var(--surface);
  padding:56px 24px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-state i{font-size:32px;color:var(--brand-500)}
.empty-state h2{font-size:22px;margin:16px 0 8px}
.empty-state p{color:var(--text-muted);margin-bottom:20px}

/* ============ Sidebar ============ */
.article-side{max-width:100%}
.side-sticky{position:sticky;top:88px;display:grid;gap:20px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:22px;box-shadow:var(--shadow-1);
}
.side-card h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3 i{color:var(--brand-500);font-size:15px}
.side-list{display:grid;gap:10px}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius-s);
  font-size:14px;font-weight:600;color:var(--text-muted);background:var(--surface);
  transition:all 200ms ease;
}
.side-list a:hover{border-color:rgba(28,134,184,.45);background:var(--brand-100);color:var(--brand-700)}
.side-list a i{font-size:12px;color:var(--brand-500)}
.side-note{font-size:13px;color:var(--text-muted);line-height:1.8}
.side-cta{background:var(--brand-900);border-color:var(--brand-900)}
.side-cta h3{color:#fff}
.side-cta p{color:#B7CEDA;font-size:13px;margin-bottom:16px;line-height:1.8}
.side-fact{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-muted);padding:8px 0;border-bottom:1px dashed var(--line)}
.side-fact:last-child{border-bottom:0}
.side-fact strong{color:var(--brand-700);font-weight:600}

/* ============ Sections ============ */
.section{padding:72px 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.section-head h2{font-size:32px}
.section-head p{color:var(--text-muted);font-size:15px;margin-top:8px}
.card-grid{display:grid;gap:24px;grid-template-columns:repeat(3,minmax(0,1fr))}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);
  overflow:hidden;box-shadow:var(--shadow-1);transition:all 200ms ease;display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(28,134,184,.4)}
.card__media{aspect-ratio:16/9;background:var(--brand-100);overflow:hidden}
.card__media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.card__body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card__body h3{font-size:19px}
.card__body h3 a{color:var(--brand-900)}
.card__body h3 a:hover{color:var(--brand-500)}
.card__body p{font-size:14px;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card__foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between}

/* CTA band */
.cta-band{background:var(--brand-100);border-top:1px solid rgba(28,134,184,.18);border-bottom:1px solid rgba(28,134,184,.18)}
.cta-band__inner{text-align:center;padding:72px 0}
.cta-band__inner h2{font-size:32px;margin-bottom:12px}
.cta-band__inner p{color:var(--text-muted);max-width:640px;margin:0 auto 26px}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ============ Footer ============ */
.site-footer{background:var(--brand-900);color:#C8DAE5;padding:64px 0 0;margin-top:0}
.site-footer h3{color:#fff;font-size:16px;margin-bottom:16px}
.footer-brand p{color:#9FB9C8;font-size:14px;margin-top:14px;max-width:320px}
.site-footer .logo{color:#fff;font-size:18px}
.site-footer .logo:hover{color:#fff}
.footer-links{display:grid;gap:10px}
.footer-links a{color:#C8DAE5;font-size:14px}
.footer-links a:hover{color:var(--ice-200)}
.footer-contact{display:grid;gap:10px;font-size:14px;color:#C8DAE5}
.footer-contact span{display:flex;align-items:center;gap:8px}
.footer-contact i{color:var(--brand-500)}
.footer-bottom{
  margin-top:44px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:#93AFC0;
}

/* ============ Fixed convert bar ============ */
.convert-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:55;background:var(--surface);
  box-shadow:0 -12px 32px rgba(11,46,69,.10);transform:translateY(120%);
  transition:transform 260ms ease;
}
.convert-bar.is-visible{transform:translateY(0)}
.convert-bar__inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.convert-bar__text{font-size:14px;color:var(--text-muted);display:flex;align-items:center;gap:8px}
.convert-bar__text i{color:var(--accent-500)}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .card:hover{transform:none}
}

/* ============ Responsive ============ */
@media (max-width:1199px){
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:991px){
  .nav-menu{
    position:fixed;top:0;right:0;height:100vh;width:300px;max-width:86vw;background:var(--surface);
    flex-direction:column;align-items:flex-start;gap:8px;padding:88px 24px 32px;
    transform:translateX(100%);transition:transform 240ms ease;z-index:80;box-shadow:var(--shadow-2);
    overflow-y:auto;
  }
  body.nav-open .nav-menu{transform:translateX(0)}
  body.nav-open .nav-overlay{opacity:1;visibility:visible}
  .nav-menu a{width:100%;padding:12px 0;border-bottom:1px solid var(--line);font-size:16px}
  .nav-menu a::after{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-right .btn{display:none}
  .article-title{font-size:36px}
  .article-body h2{font-size:26px}
  .side-sticky{position:static}
  .article-side{margin-top:24px}
  .article-main{max-width:100%}
  .section{padding:56px 0}
  .section-head h2{font-size:26px}
  .cta-band__inner{padding:56px 0}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .article-title{font-size:28px}
  .article-body h2{font-size:22px}
  .article-body h3{font-size:18px}
  .site-main{padding-top:24px}
  .card-grid{grid-template-columns:1fr}
  .section{padding:48px 0}
  .section-head h2{font-size:22px}
  .btn{width:100%}
  .btn-sm{width:auto}
  .cta-band__actions .btn{width:100%}
  .convert-bar__inner{height:60px}
  .convert-bar__text{display:none}
  .footer-bottom{flex-direction:column}
  .inline-promo{flex-direction:column;align-items:flex-start}
}
@media (max-width:575px){
  body{font-size:15px}
  .logo{font-size:17px}
  .logo__mark{width:30px;height:30px;font-size:12px}
  .article-meta{gap:10px}
  .article-body{font-size:15px}
}

/* roulang page: category1 */
:root{
  --brand-900:#0B2E45;
  --brand-700:#12557A;
  --brand-500:#1C86B8;
  --brand-100:#E4F1F8;
  --ice-200:#CFEAF5;
  --accent-500:#FF7A29;
  --accent-600:#E8671A;
  --bg:#F7FAFC;
  --surface:#FFFFFF;
  --line:#E2EAF0;
  --text:#1D2A38;
  --text-muted:#5B6B7C;
  --radius-card:14px;
  --radius-sm:10px;
  --radius-img:12px;
  --shadow-1:0 4px 12px rgba(11,46,69,.06);
  --shadow-2:0 12px 32px rgba(11,46,69,.10);
  --container:1200px;
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  padding-bottom:84px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand-500);text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{font-family:inherit;color:var(--text);font-weight:700;line-height:1.25;margin:0 0 14px}
h1{font-size:44px}
h2{font-size:32px;margin-bottom:16px}
h3{font-size:20px;font-weight:600;margin-bottom:10px}
p{margin:0 0 16px}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
input,textarea{font-family:inherit;font-size:15px}
:focus-visible{outline:3px solid rgba(28,134,184,.35);outline-offset:2px}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%}

/* 按钮体系 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;border:1.5px solid transparent;
  transition:all .2s ease;white-space:nowrap;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--accent-500);color:#fff;box-shadow:0 6px 16px rgba(255,122,41,.24)}
.btn-primary:hover,.btn-primary:focus{background:var(--accent-600);color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,122,41,.28)}
.btn-ghost{background:transparent;border-color:var(--brand-500);color:var(--brand-700)}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-500)}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand-500);font-weight:600;font-size:15px;background:none;border:0;padding:0}
.btn-link i{transition:transform .2s ease}
.btn-link:hover i{transform:translateX(4px)}
.btn-block{width:100%}

/* 徽章 */
.badge{display:inline-block;background:var(--brand-100);color:var(--brand-700);font-size:13px;line-height:1;padding:7px 12px;border-radius:999px;font-weight:600}
.badge-accent{background:rgba(255,122,41,.12);color:var(--accent-600)}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--surface);
  border-bottom:1px solid var(--line);transition:box-shadow .2s ease,height .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.nav-inner{display:flex;align-items:center;gap:24px;height:var(--nav-h)}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--brand-900);font-weight:700;font-size:18px;letter-spacing:.2px}
.logo:hover{color:var(--brand-900)}
.logo__mark{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-900);color:#fff;font-size:13px;font-weight:700;letter-spacing:.5px;flex:none;
}
.logo__text{line-height:1}
.logo__text span{color:var(--brand-500)}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:16px;flex:1}
.nav-menu a{
  position:relative;display:inline-block;padding:20px 14px;color:var(--text);font-size:15px;font-weight:500;
}
.nav-menu a:hover{color:var(--brand-700)}
.nav-menu a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:12px;height:2px;background:var(--brand-500);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-menu a.is-active{color:var(--brand-700);font-weight:600}
.nav-menu a.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-icon{
  width:40px;height:40px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--surface);
  color:var(--brand-700);display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease;
}
.nav-icon:hover{border-color:var(--brand-500);color:var(--brand-500);background:var(--brand-100)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:var(--radius-sm);border:1px solid var(--line);
  background:var(--surface);color:var(--brand-900);
}
.nav-overlay{
  position:fixed;inset:0;background:rgba(11,46,69,.45);opacity:0;visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease;z-index:70;
}
.nav-overlay.is-open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:290px;max-width:86vw;background:var(--surface);
  z-index:80;transform:translateX(100%);transition:transform .24s ease;padding:22px 20px;overflow-y:auto;
  box-shadow:-10px 0 30px rgba(11,46,69,.12);
}
.nav-drawer.is-open{transform:translateX(0)}
.nav-drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.nav-drawer__close{width:36px;height:36px;border-radius:var(--radius-sm);border:1px solid var(--line);background:#fff;color:var(--brand-900)}
.nav-drawer a.drawer-link{
  display:block;padding:13px 4px;color:var(--text);font-size:16px;border-bottom:1px solid var(--line);
}
.nav-drawer a.drawer-link.is-active{color:var(--brand-700);font-weight:600}
.nav-drawer .btn{margin-top:18px}

/* 面包屑 */
.crumbs{font-size:13px;color:var(--text-muted);padding:22px 0 0}
.crumbs a{color:var(--text-muted)}
.crumbs a:hover{color:var(--brand-500)}
.crumbs span.sep{margin:0 8px;color:var(--line)}
.crumbs .current{color:var(--brand-500);font-weight:600}

/* Hero */
.cat-hero{background:linear-gradient(180deg,#F2F9FC 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.cat-hero__grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;padding:28px 0 56px}
.cat-hero h1{font-size:40px;margin-bottom:16px}
.cat-hero__lead{color:var(--text-muted);font-size:16px;max-width:620px;margin-bottom:24px}
.cat-hero__actions{display:flex;flex-wrap:wrap;gap:14px}
.cat-hero__media{
  position:relative;border-radius:var(--radius-card);overflow:hidden;background:var(--brand-100);
  aspect-ratio:16 / 10;box-shadow:var(--shadow-2);
}
.cat-hero__media img{width:100%;height:100%;object-fit:cover}
.cat-hero__tag{
  position:absolute;left:16px;bottom:16px;background:rgba(255,255,255,.94);color:var(--brand-700);
  font-size:13px;font-weight:600;padding:8px 14px;border-radius:999px;box-shadow:var(--shadow-1);
}

/* 板块通用 */
.section{padding:72px 0}
.section--tight{padding:56px 0}
.section--ice{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head p{color:var(--text-muted);margin:0}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;max-width:none;gap:20px;flex-wrap:wrap}

/* 卡片 */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-1);height:100%;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(28,134,184,.4)}
.card p{color:var(--text-muted);font-size:15px;margin:0}
.card__icon{
  width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-100);color:var(--brand-500);font-size:18px;margin-bottom:16px;
}
.card__icon--accent{background:rgba(255,122,41,.12);color:var(--accent-500)}
.point-list{margin-top:14px}
.point-list li{position:relative;padding-left:16px;color:var(--text-muted);font-size:15px;line-height:1.8}
.point-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--brand-500);
}
.point-list li + li{margin-top:6px}

/* 图文交替 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split + .split{margin-top:64px}
.split__media{border-radius:var(--radius-img);overflow:hidden;background:var(--brand-100);aspect-ratio:4 / 3;box-shadow:var(--shadow-1)}
.split__media img{width:100%;height:100%;object-fit:cover}
.split__body h2{font-size:28px}
.split__body p{color:var(--text-muted);font-size:15.5px}
.split--reverse .split__media{order:2}
.split--reverse .split__body{order:1}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}

/* 时间线 */
.timeline{position:relative;max-width:880px;margin:0 auto;padding-left:8px}
.timeline::before{content:"";position:absolute;left:19px;top:10px;bottom:10px;width:2px;background:var(--ice-200)}
.tl-item{position:relative;padding:0 0 30px 62px}
.tl-item:last-child{padding-bottom:0}
.tl-item__num{
  position:absolute;left:0;top:0;width:40px;height:40px;border-radius:12px;background:var(--surface);
  border:1.5px solid var(--brand-500);color:var(--brand-700);font-weight:700;font-size:15px;
  display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums;
}
.tl-item h3{margin-bottom:6px}
.tl-item p{color:var(--text-muted);font-size:15px;margin:0}

/* 参数清单 */
.spec-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);padding:10px 24px;
}
.spec-row{
  display:grid;grid-template-columns:180px 1fr;gap:20px;padding:18px 0;border-bottom:1px solid var(--line);
}
.spec-row:last-child{border-bottom:0}
.spec-row dt{color:var(--brand-700);font-weight:600;font-size:15px;font-variant-numeric:tabular-nums}
.spec-row dd{margin:0;color:var(--text-muted);font-size:15px}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-side h2{font-size:30px}
.faq-side p{color:var(--text-muted);font-size:15px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-1);margin-bottom:12px;overflow:hidden}
.faq-trigger{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;
  background:none;border:0;padding:18px 20px;font-size:16px;font-weight:600;color:var(--text);
}
.faq-trigger:hover{color:var(--brand-700)}
.faq-trigger .faq-mark{
  flex:none;width:26px;height:26px;border-radius:8px;background:var(--brand-100);color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;font-size:14px;transition:transform .2s ease,background-color .2s ease,color .2s ease;
}
.faq-item.is-open .faq-mark{transform:rotate(45deg);background:var(--accent-500);color:#fff}
.faq-panel{max-height:0;overflow:hidden;transition:max-height .2s ease}
.faq-panel p{margin:0;padding:0 20px 20px;color:var(--text-muted);font-size:15px;line-height:1.8}

/* CTA 与表单 */
.cta-band{
  position:relative;background:var(--brand-100);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cta-band__bg{
  position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.14;
}
.cta-band__inner{position:relative;display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start;padding:64px 0}
.cta-copy h2{font-size:30px}
.cta-copy p{color:var(--brand-700);font-size:15.5px;margin-bottom:20px}
.cta-points li{display:flex;align-items:flex-start;gap:10px;color:var(--brand-700);font-size:15px;margin-bottom:10px}
.cta-points i{color:var(--accent-500);margin-top:6px}
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-2);padding:28px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field--full{grid-column:1 / -1}
.field label{font-size:14px;font-weight:600;color:var(--text)}
.field input,.field textarea{
  height:48px;border:1px solid var(--line);border-radius:var(--radius-sm);padding:0 14px;color:var(--text);
  background:#fff;transition:border-color .2s ease,box-shadow .2s ease;width:100%;
}
.field textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(28,134,184,.18)}
.form-note{font-size:13px;color:var(--text-muted);margin:14px 0 0}
.form-actions{display:flex;justify-content:flex-end;margin-top:20px}

/* 页脚 */
.site-footer{background:var(--brand-900);color:#CFE0EC;padding:64px 0 0;margin-top:0}
.site-footer h3{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.site-footer .logo{color:#fff;margin-bottom:16px}
.site-footer .logo__mark{background:#fff;color:var(--brand-900)}
.site-footer .logo__text span{color:var(--ice-200)}
.footer-brand p{color:#A9C3D4;font-size:14.5px;max-width:320px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:#CFE0EC;font-size:14.5px}
.footer-links a:hover{color:var(--ice-200)}
.footer-contact{display:flex;flex-direction:column;gap:10px;font-size:14.5px;color:#A9C3D4}
.footer-contact i{width:18px;color:var(--ice-200)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  margin-top:48px;padding:20px 0;border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;color:#8FAFC2;
}

/* 底部固定转化条 */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:50;background:var(--surface);
  box-shadow:0 -8px 24px rgba(11,46,69,.10);border-top:1px solid var(--line);
  transform:translateY(100%);transition:transform .24s ease;
}
.sticky-cta.is-visible{transform:translateY(0)}
.sticky-cta__inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:64px;padding-top:10px;padding-bottom:10px}
.sticky-cta__text{font-size:14.5px;color:var(--brand-900);margin:0}

/* 响应式 */
@media (max-width:1199px){
  h1{font-size:36px}
  h2{font-size:26px}
  .cat-hero h1{font-size:34px}
}
@media (max-width:991px){
  .nav-menu{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-right .nav-icon{display:none}
  .nav-right .btn{display:none}
  .cat-hero__grid{grid-template-columns:1fr;gap:28px;padding-bottom:44px}
  .cat-hero__media{aspect-ratio:16 / 9}
  .split{grid-template-columns:1fr;gap:24px}
  .split--reverse .split__media{order:1}
  .split--reverse .split__body{order:2}
  .faq-wrap{grid-template-columns:1fr;gap:24px}
  .cta-band__inner{grid-template-columns:1fr;gap:28px;padding:48px 0}
  .section{padding:56px 0}
}
@media (max-width:767px){
  body{font-size:15px;padding-bottom:96px}
  h1{font-size:28px}
  h2{font-size:22px}
  h3{font-size:18px}
  .container{padding:0 16px}
  .cat-hero h1{font-size:27px;margin-bottom:12px}
  .split__body h2{font-size:22px}
  .spec-row{grid-template-columns:1fr;gap:6px}
  .form-grid{grid-template-columns:1fr}
  .form-actions{justify-content:stretch}
  .form-actions .btn{width:100%}
  .sticky-cta__inner{flex-direction:column;align-items:stretch;gap:8px;padding:10px 0 12px}
  .sticky-cta__inner .btn{width:100%}
  .sticky-cta__text{font-size:13.5px;line-height:1.6}
}
@media (max-width:575px){
  .section{padding:44px 0}
  .cat-hero__actions{flex-direction:column;align-items:stretch}
  .cat-hero__actions .btn{width:100%}
  .card{padding:20px}
  .form-card{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important}
  .card:hover{transform:none}
  .btn-primary:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --brand-900:#0B2E45;
  --brand-700:#12557A;
  --brand-500:#1C86B8;
  --brand-100:#E4F1F8;
  --ice-200:#CFEAF5;
  --accent-500:#FF7A29;
  --accent-600:#E8671A;
  --bg:#F7FAFC;
  --surface:#FFFFFF;
  --line:#E2EAF0;
  --text:#1D2A38;
  --text-muted:#5B6B7C;
  --r-card:14px;
  --r-sm:10px;
  --shadow-1:0 4px 12px rgba(11,46,69,.06);
  --shadow-2:0 12px 32px rgba(11,46,69,.10);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  padding-bottom:64px;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand-500);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-700);}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;color:var(--brand-900);}
h1{font-size:44px;}
h2{font-size:32px;}
h3{font-size:20px;font-weight:600;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;}
input,textarea,select{font:inherit;color:inherit;}
:focus-visible{outline:3px solid rgba(28,134,184,.35);outline-offset:2px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.grid-y-gap{row-gap:24px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav-inner{display:flex;align-items:center;gap:20px;height:64px;transition:height .2s ease;}
.site-header.is-scrolled .nav-inner{height:58px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none;color:var(--brand-900);font-weight:700;}
.logo__mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand-700);color:#fff;
  display:grid;place-items:center;font-size:12px;letter-spacing:.5px;
}
.logo__text{font-size:17px;line-height:1;}
.logo__text span{color:var(--brand-500);}
.nav-menu{display:flex;align-items:center;gap:2px;margin-left:8px;margin-right:auto;}
.nav-menu a{
  position:relative;display:flex;align-items:center;height:100%;padding:0 12px;
  font-size:15px;color:var(--text-muted);border-radius:8px;transition:color .2s ease;
}
.nav-menu a:hover{color:var(--brand-700);}
.nav-menu a.is-active{color:var(--brand-700);font-weight:600;}
.nav-menu a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;background:var(--brand-500);border-radius:2px;
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-icon{
  width:40px;height:40px;border-radius:var(--r-sm);border:1px solid var(--line);background:#fff;
  color:var(--brand-700);cursor:pointer;display:grid;place-items:center;transition:all .2s ease;
}
.nav-icon:hover{background:var(--brand-100);border-color:rgba(28,134,184,.4);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:#fff;color:var(--brand-700);cursor:pointer;place-items:center;
}
.nav-mask{
  position:fixed;inset:0;background:rgba(11,46,69,.45);opacity:0;visibility:hidden;
  transition:opacity .25s ease;z-index:85;
}
.nav-mask.is-open{opacity:1;visibility:visible;}
body.nav-open{overflow:hidden;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);border:1.5px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--accent-500);color:#fff;box-shadow:0 6px 16px rgba(255,122,41,.22);}
.btn-primary:hover{background:var(--accent-600);color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,122,41,.26);}
.btn-primary:active{transform:translateY(0);}
.btn-secondary{background:#fff;border-color:var(--brand-500);color:var(--brand-700);}
.btn-secondary:hover{background:var(--brand-100);color:var(--brand-700);transform:translateY(-2px);}
.btn-secondary:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;color:var(--brand-500);}
.link-arrow i{transition:transform .2s ease;}
.link-arrow:hover{color:var(--brand-700);}
.link-arrow:hover i{transform:translateX(4px);}

/* ---------- Section basics ---------- */
.section{padding:96px 0;}
.section--surface{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section--ice{background:var(--brand-100);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head p{margin-top:14px;color:var(--text-muted);font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:16px;padding:6px 14px;
  border-radius:999px;background:var(--brand-100);color:var(--brand-700);
  font-size:13px;font-weight:600;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:16px;font-size:13px;color:var(--text-muted);}
.breadcrumb a{color:var(--text-muted);}
.breadcrumb a:hover{color:var(--brand-500);}
.breadcrumb .sep{color:var(--ice-200);}
.breadcrumb .current{color:var(--brand-500);font-weight:700;}

/* ---------- Page hero ---------- */
.page-hero{
  padding:40px 0 64px;
  background:linear-gradient(180deg,#EEF7FC 0%,var(--bg) 100%);
  border-bottom:1px solid var(--line);
}
.page-hero h1{margin-bottom:18px;}
.hero-lead{font-size:17px;line-height:1.85;color:var(--text-muted);margin-bottom:26px;max-width:600px;}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:28px;font-size:13px;color:var(--text-muted);}
.hero-facts span{display:inline-flex;align-items:center;gap:8px;}
.hero-facts i{color:var(--brand-500);}
.hero-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;background:var(--brand-100);
  aspect-ratio:16/11;box-shadow:var(--shadow-1);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-chip{
  position:absolute;left:18px;bottom:18px;display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.92);color:var(--brand-700);
  font-size:13px;font-weight:600;box-shadow:var(--shadow-1);
}

/* ---------- Point cards 2x2 ---------- */
.point-card{
  display:flex;gap:18px;height:100%;padding:28px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.point-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(28,134,184,.4);}
.point-icon{
  flex:0 0 48px;width:48px;height:48px;border-radius:12px;display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-700);font-size:20px;
}
.point-icon--warm{background:#FFF2E8;color:var(--accent-600);}
.point-card h3{margin-bottom:10px;}
.point-card p{color:var(--text-muted);font-size:15px;}

/* ---------- Spec list ---------- */
.spec-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);padding:12px 28px;
}
.spec-row{
  display:grid;grid-template-columns:210px 1fr;gap:20px;padding:18px 0;border-bottom:1px dashed var(--line);
}
.spec-row:last-child{border-bottom:0;}
.spec-row dt{font-weight:600;color:var(--brand-700);}
.spec-row dd{margin:0;color:var(--text-muted);font-size:15px;}
.spec-aside{
  padding:28px;border-radius:var(--r-card);background:var(--surface);
  border:1px solid var(--line);box-shadow:var(--shadow-1);
}
.spec-aside h3{margin-bottom:14px;}
.spec-aside ul{display:flex;flex-direction:column;gap:12px;}
.spec-aside li{display:flex;gap:10px;font-size:15px;color:var(--text-muted);}
.spec-aside li i{color:var(--brand-500);margin-top:5px;}
.spec-aside .link-arrow{margin-top:20px;}

/* ---------- Timeline ---------- */
.timeline{position:relative;max-width:840px;}
.tl-item{position:relative;display:flex;gap:20px;padding-bottom:28px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:19px;top:42px;bottom:0;width:2px;background:var(--ice-200);
}
.tl-item:last-child::before{display:none;}
.tl-num{
  position:relative;z-index:1;flex:0 0 40px;width:40px;height:40px;border-radius:50%;
  display:grid;place-items:center;background:#fff;border:1.5px solid var(--brand-500);
  color:var(--brand-700);font-size:13px;font-weight:700;
}
.tl-item:nth-child(even) .tl-num{border-color:var(--accent-500);color:var(--accent-600);}
.tl-body h3{margin-bottom:8px;}
.tl-body p{color:var(--text-muted);font-size:15px;}

/* ---------- Split blocks ---------- */
.split-media{
  border-radius:12px;overflow:hidden;background:var(--brand-100);
  aspect-ratio:4/3;box-shadow:var(--shadow-1);
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-body h2{margin-bottom:18px;}
.split-body p{color:var(--text-muted);font-size:16px;}
.split-body p + p{margin-top:16px;}
.split-body .link-arrow{margin-top:22px;}

/* ---------- FAQ ---------- */
.faq-intro h2{margin-bottom:16px;}
.faq-intro p{color:var(--text-muted);max-width:340px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow-1);overflow:hidden;transition:border-color .2s ease;
}
.faq-item.is-open{border-color:rgba(28,134,184,.45);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--brand-900);
}
.faq-icon{position:relative;flex:0 0 20px;width:20px;height:20px;transition:transform .2s ease;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand-500);border-radius:2px;transition:background-color .2s ease;}
.faq-icon::before{left:9px;top:2px;width:2px;height:16px;}
.faq-icon::after{left:2px;top:9px;width:16px;height:2px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-item.is-open .faq-icon::before,
.faq-item.is-open .faq-icon::after{background:var(--accent-500);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;}
.faq-a-inner{padding:0 22px 22px;font-size:15px;line-height:1.8;color:var(--text-muted);}

/* ---------- CTA + form ---------- */
.cta-band{padding:88px 0;background:var(--brand-100);}
.cta-band h2{margin-bottom:16px;}
.cta-band > .container > .grid-x > .cell > p{color:var(--text-muted);font-size:16px;}
.cta-points{display:flex;flex-direction:column;gap:10px;margin-top:24px;}
.cta-points li{display:flex;align-items:center;gap:10px;font-size:15px;color:var(--brand-700);}
.cta-points i{color:var(--brand-500);}
.contact-form{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);padding:28px;
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field--full{grid-column:1 / -1;}
.field label{font-size:13px;font-weight:600;color:var(--brand-700);}
.field input,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;
  padding:0 14px;height:48px;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:auto;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:inset 0 0 0 1px var(--brand-500);
}
.field input::placeholder,.field textarea::placeholder{color:#9AA8B6;}
.form-actions{display:flex;justify-content:flex-end;margin-top:20px;}
.form-hint{margin-top:12px;font-size:13px;color:var(--text-muted);text-align:right;}
.form-note{margin-top:12px;font-size:13px;color:var(--accent-600);display:none;}
.form-note.is-visible{display:block;}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand-900);color:#D6E4EE;padding:72px 0 0;}
.site-footer h3{color:#fff;font-size:16px;font-weight:600;margin-bottom:18px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand .logo__text{color:#fff;}
.footer-brand .logo__text span{color:var(--ice-200);}
.footer-brand .logo__mark{background:var(--brand-500);}
.footer-brand p{font-size:14px;line-height:1.8;color:#A8C1D2;max-width:320px;}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{color:#C8DCE9;font-size:14px;}
.footer-links a:hover{color:var(--ice-200);}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:14px;color:#A8C1D2;}
.footer-contact i{color:var(--ice-200);margin-right:8px;}
.footer-bottom{
  margin-top:56px;padding:22px 0;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:#8FA9BC;
}

/* ---------- Sticky bar ---------- */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;height:64px;background:#fff;
  box-shadow:0 -8px 24px rgba(11,46,69,.10);
  display:flex;align-items:center;
  opacity:0;transform:translateY(100%);pointer-events:none;
  transition:opacity .25s ease,transform .25s ease;
}
.sticky-bar.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.sticky-text{font-size:14px;color:var(--text-muted);}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  h1{font-size:36px;}
  h2{font-size:26px;}
  h3{font-size:18px;}
  .section{padding:72px 0;}
  .page-hero{padding:36px 0 56px;}
}
@media (max-width:991px){
  .nav-inner{height:56px;}
  .site-header.is-scrolled .nav-inner{height:56px;}
  .nav-menu{
    position:fixed;top:0;right:0;z-index:90;height:100vh;width:min(320px,86vw);
    display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:6px;margin:0;padding:84px 20px 32px;background:#fff;
    box-shadow:var(--shadow-2);transform:translateX(102%);transition:transform .25s ease;
  }
  .nav-menu a{height:48px;padding:0 10px;font-size:16px;color:var(--text);}
  .nav-menu a.is-active{color:var(--brand-700);background:var(--brand-100);border-radius:var(--r-sm);}
  .nav-menu a.is-active::after{display:none;}
  .nav-menu.is-open{transform:translateX(0);}
  .nav-toggle{display:grid;}
  .nav-right{gap:8px;}
  .hero-media{margin-top:32px;}
  .split-media{margin-bottom:28px;}
  .split--reverse .split-media{margin-top:28px;margin-bottom:0;}
  .faq-intro{margin-bottom:28px;}
  .cta-band{padding:72px 0;}
  .contact-form{margin-top:32px;}
}
@media (max-width:767px){
  body{font-size:15px;padding-bottom:60px;}
  .container{padding:0 16px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  h3{font-size:17px;}
  .section{padding:48px 0;}
  .page-hero{padding:28px 0 44px;}
  .nav-right .btn-sm{display:none;}
  .hero-lead{font-size:16px;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{width:100%;}
  .point-card{padding:22px;}
  .spec-card{padding:8px 20px;}
  .spec-row{grid-template-columns:1fr;gap:6px;}
  .tl-item{gap:14px;}
  .form-grid{grid-template-columns:1fr;}
  .form-actions .btn{width:100%;}
  .form-hint{text-align:left;}
  .site-footer{padding:52px 0 0;}
  .footer-bottom{margin-top:36px;flex-direction:column;}
  .sticky-bar{opacity:1;transform:translateY(0);pointer-events:auto;height:60px;}
  .sticky-text{font-size:13px;}
}
@media (max-width:520px){
  .hero-facts{gap:8px 16px;}
  .sticky-text{max-width:190px;line-height:1.4;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .point-card:hover,.btn:hover{transform:none;}
}

/* roulang page: category3 */
:root{
  --brand-900:#0B2E45;
  --brand-700:#12557A;
  --brand-500:#1C86B8;
  --brand-100:#E4F1F8;
  --ice-200:#CFEAF5;
  --accent-500:#FF7A29;
  --accent-600:#E8671A;
  --bg:#F7FAFC;
  --surface:#FFFFFF;
  --line:#E2EAF0;
  --text:#1D2A38;
  --text-muted:#5B6B7C;
  --radius-card:14px;
  --radius-ctl:10px;
  --radius-img:12px;
  --shadow-1:0 4px 12px rgba(11,46,69,.06);
  --shadow-2:0 12px 32px rgba(11,46,69,.10);
  --container:1200px;
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  padding-bottom:76px;
}
img{max-width:100%;display:block;border-radius:var(--radius-img)}
a{color:var(--brand-500);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;color:var(--brand-900);letter-spacing:.2px}
h1{font-size:44px}
h2{font-size:32px}
h3{font-size:20px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
input,textarea{font-family:inherit;font-size:15px;color:var(--text)}
:focus-visible{outline:3px solid rgba(28,134,184,.35);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section-head{max-width:720px;margin-bottom:40px}
.section-head p{margin-top:14px;color:var(--text-muted);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-700);
  background:var(--brand-100);border-radius:999px;padding:5px 14px;margin-bottom:16px;
}
.eyebrow i{color:var(--brand-500)}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.nav-inner{display:flex;align-items:center;gap:24px;height:var(--nav-h)}
.logo{display:flex;align-items:center;gap:10px;color:var(--brand-900);font-weight:700;flex-shrink:0}
.logo__mark{
  width:36px;height:36px;border-radius:10px;background:var(--brand-700);color:#fff;
  display:grid;place-items:center;font-size:13px;font-weight:700;letter-spacing:.6px;
}
.logo__text{font-size:17px;letter-spacing:.2px}
.logo__text span{color:var(--brand-500);font-size:13px;margin-left:3px;font-weight:600}
.nav-menu{display:flex;align-items:center;gap:2px;flex:1}
.nav-menu a{
  position:relative;display:block;padding:18px 13px;font-size:15px;color:var(--text);
  font-weight:500;transition:color .2s ease;
}
.nav-menu a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:12px;height:2px;
  background:var(--brand-500);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.nav-menu a:hover{color:var(--brand-700)}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-menu a.is-active{color:var(--brand-700);font-weight:700}
.nav-menu a.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-icon{
  width:40px;height:40px;border-radius:var(--radius-ctl);border:1px solid var(--line);
  background:#fff;color:var(--brand-700);display:grid;place-items:center;font-size:15px;
  transition:all .2s ease;
}
.nav-icon:hover{background:var(--brand-100);border-color:var(--ice-200)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:var(--radius-ctl);border:1px solid var(--line);
  background:#fff;color:var(--brand-700);font-size:17px;place-items:center;
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-ctl);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  transition:all .2s ease;white-space:nowrap;
}
.btn-primary{background:var(--accent-500);color:#fff;box-shadow:0 6px 16px rgba(255,122,41,.24)}
.btn-primary:hover{background:var(--accent-600);color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,122,41,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:#fff;border-color:var(--brand-500);color:var(--brand-700)}
.btn-outline:hover{background:var(--brand-100);color:var(--brand-700);transform:translateY(-2px)}
.btn-block{width:100%}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px}
.link-arrow i{transition:transform .2s ease;font-size:13px}
.link-arrow:hover i{transform:translateX(4px)}

/* ============ 抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,46,69,.45);opacity:0;visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease;z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(84vw,340px);background:#fff;z-index:100;
  transform:translateX(100%);transition:transform .24s ease;
  padding:24px 22px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
  box-shadow:-12px 0 32px rgba(11,46,69,.14);
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--brand-700)}
.nav-drawer a{
  display:block;padding:13px 14px;border-radius:10px;color:var(--text);font-size:15px;font-weight:500;
}
.nav-drawer a:hover{background:var(--brand-100);color:var(--brand-700)}
.nav-drawer a.is-active{background:var(--brand-100);color:var(--brand-700);font-weight:700}
.drawer-cta{margin-top:18px}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-muted);margin-bottom:16px;
}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--brand-700)}
.breadcrumb .sep{color:#B4C3D0}
.breadcrumb .current{color:var(--brand-700);font-weight:700}

/* ============ Hero ============ */
.page-hero{
  background:linear-gradient(180deg,#EFF7FC 0%,#F7FAFC 100%);
  border-bottom:1px solid var(--line);
  padding:52px 0 64px;
}
.hero-row{align-items:center}
.hero-copy h1{font-size:44px;max-width:620px}
.hero-copy .lede{
  margin-top:18px;font-size:16px;line-height:1.85;color:var(--text-muted);max-width:600px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-points{
  display:flex;flex-wrap:wrap;gap:20px;margin-top:26px;
  font-size:14px;color:var(--text-muted);
}
.hero-points span{display:inline-flex;align-items:center;gap:7px}
.hero-points i{color:var(--brand-500);font-size:13px}
.hero-media{position:relative}
.hero-media .frame{
  aspect-ratio:16/10;border-radius:var(--radius-card);overflow:hidden;
  background:var(--brand-100);box-shadow:var(--shadow-2);
}
.hero-media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.hero-badge{
  position:absolute;left:18px;bottom:-16px;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:12px 16px;box-shadow:var(--shadow-2);display:flex;align-items:center;gap:12px;
}
.hero-badge i{color:var(--accent-500);font-size:18px}
.hero-badge b{display:block;font-size:14px;color:var(--brand-900)}
.hero-badge small{font-size:12px;color:var(--text-muted)}

/* ============ 要点卡 ============ */
.point-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-1);height:100%;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.point-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(28,134,184,.4)}
.point-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  font-size:18px;margin-bottom:16px;
}
.tone-ice .point-icon{background:var(--brand-100);color:var(--brand-500)}
.tone-amber .point-icon{background:#FFF0E5;color:var(--accent-500)}
.point-card h3{font-size:18px;margin-bottom:10px}
.point-card p{font-size:15px;color:var(--text-muted);line-height:1.8}
.point-card ul{margin-top:12px;display:grid;gap:8px}
.point-card li{
  position:relative;padding-left:16px;font-size:14px;color:var(--text-muted);
}
.point-card li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:2px;background:var(--brand-500);
}

/* ============ 步骤时间线 ============ */
.steps-wrap{max-width:880px;margin:0 auto;position:relative}
.steps-wrap::before{
  content:"";position:absolute;left:23px;top:12px;bottom:12px;width:2px;background:var(--ice-200);border-radius:2px;
}
.step-item{position:relative;padding-left:76px;padding-bottom:34px}
.step-item:last-child{padding-bottom:0}
.step-num{
  position:absolute;left:0;top:0;width:48px;height:48px;border-radius:14px;
  background:var(--brand-100);color:var(--brand-700);display:grid;place-items:center;
  font-size:16px;font-weight:700;border:2px solid #fff;box-shadow:var(--shadow-1);
  font-variant-numeric:tabular-nums;
}
.step-item:nth-child(even) .step-num{background:#FFF0E5;color:var(--accent-600)}
.step-body{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 24px;box-shadow:var(--shadow-1);transition:box-shadow .2s ease,transform .2s ease;
}
.step-body:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.step-body h3{font-size:18px;margin-bottom:8px}
.step-body p{font-size:15px;color:var(--text-muted)}
.step-note{
  margin-top:12px;font-size:13px;color:var(--brand-700);background:var(--brand-100);
  border-radius:8px;padding:8px 12px;display:inline-block;
}

/* ============ 图文交替 ============ */
.split-row{align-items:center}
.split-row + .split-row{margin-top:72px}
.split-media .frame{
  aspect-ratio:4/3;border-radius:var(--radius-img);overflow:hidden;background:var(--brand-100);
  box-shadow:var(--shadow-1);
}
.split-media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.split-copy h2{font-size:30px;margin-bottom:16px}
.split-copy p{color:var(--text-muted);font-size:16px;line-height:1.85}
.split-copy p + p{margin-top:14px}
.split-copy .link-arrow{margin-top:20px}

/* ============ 参数清单 ============ */
.spec-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:14px 24px;box-shadow:var(--shadow-1);
}
.spec-row{
  display:flex;flex-wrap:wrap;gap:8px;padding:16px 0;border-bottom:1px dashed var(--line);
}
.spec-row:last-child{border-bottom:0}
.spec-key{
  width:170px;flex-shrink:0;font-weight:600;color:var(--brand-700);font-size:15px;
  display:flex;align-items:center;gap:8px;
}
.spec-key i{color:var(--brand-500);font-size:14px}
.spec-val{flex:1;min-width:220px;font-size:15px;color:var(--text-muted)}

/* ============ FAQ ============ */
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(28,134,184,.4)}
.faq-item.is-open{box-shadow:var(--shadow-1);border-color:rgba(28,134,184,.45)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;text-align:left;padding:20px 22px;
  font-size:16px;font-weight:600;color:var(--brand-900);
}
.faq-sign{
  width:26px;height:26px;flex-shrink:0;border-radius:8px;background:var(--brand-100);
  color:var(--brand-700);display:grid;place-items:center;font-size:13px;
  transition:transform .2s ease,background .2s ease,color .2s ease;
}
.faq-item.is-open .faq-sign{transform:rotate(45deg);background:var(--accent-500);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-a p{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--text-muted)}

/* ============ CTA + 表单 ============ */
.cta-band{
  background:var(--brand-100);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-copy h2{font-size:32px;margin-bottom:14px}
.cta-copy p{color:var(--text-muted);font-size:16px;line-height:1.85;max-width:520px}
.cta-points{margin-top:22px;display:grid;gap:10px}
.cta-points span{display:flex;align-items:center;gap:9px;font-size:15px;color:var(--text)}
.cta-points i{color:var(--brand-500)}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-2);
}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .hint{font-size:13px;color:var(--text-muted);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--brand-700);margin-bottom:7px}
.field input,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--radius-ctl);
  background:#FBFDFE;padding:0 14px;height:48px;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:110px;padding:12px 14px;resize:vertical}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:inset 0 0 0 1px var(--brand-500);background:#fff;
}
.field.is-error input,.field.is-error textarea{border-color:var(--accent-500)}
.field .err{display:none;font-size:13px;color:var(--accent-600);margin-top:6px}
.field.is-error .err{display:block}
.form-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:8px}
.form-foot small{font-size:13px;color:var(--text-muted)}
.form-ok{
  display:none;margin-top:14px;font-size:14px;color:var(--brand-700);
  background:var(--brand-100);border-radius:10px;padding:10px 14px;
}
.form-ok.is-show{display:block}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-900);color:#C7D8E3;padding:72px 0 0;margin-top:0}
.site-footer h3{
  color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;letter-spacing:.4px;
}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo__text span{color:var(--ice-200)}
.footer-brand .logo__mark{background:var(--brand-500)}
.footer-brand p{font-size:14px;line-height:1.85;color:#9FB6C6;max-width:320px}
.footer-links{display:grid;gap:10px}
.footer-links a{color:#C7D8E3;font-size:14px}
.footer-links a:hover{color:var(--ice-200)}
.footer-contact{display:grid;gap:12px}
.footer-contact span{display:flex;align-items:center;gap:9px;font-size:14px;color:#C7D8E3}
.footer-contact i{color:var(--brand-500);width:16px;text-align:center}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#93ABBB;
}

/* ============ 固定转化条 ============ */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:#fff;box-shadow:0 -8px 24px rgba(11,46,69,.12);
  padding:10px 0;transform:translateY(0);opacity:1;
  transition:opacity .25s ease,transform .25s ease;
}
.sticky-cta.is-hidden{opacity:0;transform:translateY(100%);pointer-events:none}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.sticky-inner p{font-size:14px;color:var(--text);font-weight:500}
.sticky-inner p span{color:var(--text-muted);font-weight:400;margin-left:8px}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  h1{font-size:38px}
  .hero-copy h1{font-size:38px}
  .nav-menu a{padding:18px 9px;font-size:14px}
}
@media (max-width:991px){
  h1{font-size:32px}
  h2{font-size:26px}
  .hero-copy h1{font-size:32px}
  .section{padding:72px 0}
  .section--tight{padding:56px 0}
  .nav-menu{display:none}
  .nav-toggle{display:grid}
  .nav-right .btn-sm{display:none}
  .hero-copy{margin-bottom:36px}
  .split-row + .split-row{margin-top:56px}
  .split-media{margin-bottom:26px}
  .sticky-cta.is-hidden{opacity:1;transform:translateY(0);pointer-events:auto}
}
@media (max-width:767px){
  body{padding-bottom:80px}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .page-hero{padding:36px 0 48px}
  h1{font-size:28px}
  h2{font-size:22px}
  h3{font-size:17px}
  .hero-copy h1{font-size:28px}
  .hero-copy .lede{font-size:15px}
  .split-copy h2{font-size:22px}
  .footer-bottom{margin-top:40px}
  .form-foot{flex-direction:column;align-items:stretch}
  .form-foot .btn{width:100%}
  .spec-key{width:100%}
}
@media (max-width:575px){
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .sticky-inner p{font-size:13px}
  .sticky-inner p span{display:none}
  .sticky-inner .btn{height:42px;padding:0 16px;font-size:14px}
  .step-item{padding-left:64px}
  .step-num{width:42px;height:42px;border-radius:12px;font-size:15px}
  .steps-wrap::before{left:20px}
  .cta-copy h2{font-size:22px}
  .form-card{padding:22px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .point-card:hover,.step-body:hover,.btn:hover{transform:none}
}

/* roulang page: category4 */
:root{
  --brand-900:#0B2E45;
  --brand-700:#12557A;
  --brand-500:#1C86B8;
  --brand-100:#E4F1F8;
  --ice-200:#CFEAF5;
  --accent-500:#FF7A29;
  --accent-600:#E8671A;
  --bg:#F7FAFC;
  --surface:#FFFFFF;
  --line:#E2EAF0;
  --text:#1D2A38;
  --text-muted:#5B6B7C;
  --radius-card:14px;
  --radius-ctrl:10px;
  --radius-img:12px;
  --shadow-1:0 4px 12px rgba(11,46,69,.06);
  --shadow-2:0 12px 32px rgba(11,46,69,.10);
  --container:1200px;
  --nav-h:64px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  padding-bottom:88px;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-500);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--brand-700);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;color:var(--brand-900);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(28,134,184,.35);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--ice{background:var(--brand-100);}
.section--white{background:var(--surface);}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:var(--nav-h);
  transition:min-height .2s ease;
}
.site-header.is-scrolled .nav-inner{min-height:58px;}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--brand-900);
  font-weight:700;
  font-size:17px;
  white-space:nowrap;
}
.logo:hover{color:var(--brand-700);}
.logo__mark{
  width:34px;height:34px;
  border-radius:10px;
  background:var(--brand-700);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  letter-spacing:.5px;
  font-weight:700;
}
.logo__text span{color:var(--brand-500);margin-left:2px;}
.nav-menu{
  display:flex;
  align-items:center;
  gap:26px;
  margin-left:auto;
}
.nav-menu a{
  position:relative;
  color:var(--text);
  font-size:15px;
  font-weight:500;
  padding:6px 0;
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  background:var(--brand-500);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s ease;
}
.nav-menu a:hover{color:var(--brand-700);}
.nav-menu a:hover::after,
.nav-menu a.is-active::after{transform:scaleX(1);}
.nav-menu a.is-active{color:var(--brand-700);font-weight:600;}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-icon{
  width:40px;height:40px;
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:var(--radius-ctrl);
  color:var(--brand-700);
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.nav-icon:hover{border-color:var(--brand-500);color:var(--brand-500);background:var(--brand-100);}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:var(--radius-ctrl);
  color:var(--brand-700);
  cursor:pointer;
}
.nav-mask{
  position:fixed;
  inset:0;
  background:rgba(11,46,69,.45);
  opacity:0;
  visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease;
  z-index:70;
}
.nav-mask.is-open{opacity:1;visibility:visible;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-ctrl);
  border:1.5px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:transform .2s ease,background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
  text-align:center;
}
.btn-primary{
  background:var(--accent-500);
  color:#fff;
  box-shadow:0 6px 16px rgba(255,122,41,.22);
}
.btn-primary:hover{background:var(--accent-600);color:#fff;transform:translateY(-2px);}
.btn-outline{
  background:transparent;
  border-color:var(--brand-500);
  color:var(--brand-700);
}
.btn-outline:hover{background:var(--brand-100);color:var(--brand-700);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand-500);
  font-weight:600;
  font-size:15px;
}
.link-arrow i{transition:transform .2s ease;}
.link-arrow:hover i{transform:translateX(4px);}

/* ============ 面包屑 ============ */
.breadcrumb{
  font-size:13px;
  color:var(--text-muted);
  margin-bottom:16px;
}
.breadcrumb a{color:var(--text-muted);}
.breadcrumb a:hover{color:var(--brand-500);}
.breadcrumb .sep{margin:0 8px;color:#B9C7D3;}
.breadcrumb .current{color:var(--brand-500);font-weight:700;}

/* ============ 分类 Hero ============ */
.cat-hero{
  background:linear-gradient(180deg,var(--brand-100) 0%,rgba(228,241,248,.35) 100%);
  border-bottom:1px solid var(--line);
  padding:40px 0 44px;
}
.cat-hero__grid{align-items:center;}
.cat-hero h1{
  font-size:44px;
  letter-spacing:-.5px;
  margin-bottom:16px;
}
.cat-hero__lead{
  font-size:16px;
  color:var(--text-muted);
  max-width:560px;
  margin-bottom:24px;
}
.cat-hero__actions{display:flex;gap:12px;flex-wrap:wrap;}
.cat-hero__media{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  aspect-ratio:16/10;
  background:var(--ice-200);
  box-shadow:var(--shadow-2);
}
.cat-hero__media img{width:100%;height:100%;object-fit:cover;}
.cat-hero__tag{
  position:absolute;
  left:16px;bottom:16px;
  background:rgba(255,255,255,.94);
  color:var(--brand-700);
  font-size:13px;
  font-weight:600;
  padding:6px 12px;
  border-radius:999px;
  box-shadow:var(--shadow-1);
}

/* ============ 通用板块标题 ============ */
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:40px;
}
.section-head h2{font-size:32px;}
.section-head p{
  color:var(--text-muted);
  font-size:15px;
  margin-top:10px;
  max-width:640px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--brand-700);
  background:var(--brand-100);
  border-radius:999px;
  padding:5px 12px;
  margin-bottom:14px;
}

/* ============ 要点卡 2×2 ============ */
.point-card{
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 24px;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.point-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-2);
  border-color:rgba(28,134,184,.4);
}
.point-card__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.point-card__icon{
  width:44px;height:44px;
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-100);
  color:var(--brand-500);
  font-size:18px;
}
.point-card--accent .point-card__icon{background:rgba(255,122,41,.12);color:var(--accent-500);}
.point-card__no{
  font-size:13px;
  font-weight:700;
  color:var(--brand-500);
  font-variant-numeric:tabular-nums;
}
.point-card h3{font-size:20px;margin-bottom:10px;}
.point-card p{color:var(--text-muted);font-size:15px;}

/* ============ 图文交替 ============ */
.split{align-items:center;}
.split__media{
  border-radius:var(--radius-img);
  overflow:hidden;
  background:var(--brand-100);
  aspect-ratio:4/3;
  box-shadow:var(--shadow-1);
}
.split__media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.split__media:hover img{transform:scale(1.03);}
.split h2{font-size:32px;margin-bottom:16px;}
.split p{color:var(--text-muted);margin-bottom:14px;}
.split__list{margin:18px 0 22px;}
.split__list li{
  position:relative;
  padding-left:20px;
  color:var(--text);
  font-size:15px;
  margin-bottom:10px;
}
.split__list li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--brand-500);
}

/* ============ 编号步骤 / 时间线 ============ */
.steps{
  position:relative;
  padding-left:34px;
}
.steps::before{
  content:"";
  position:absolute;
  left:11px;top:8px;bottom:8px;
  width:2px;
  background:linear-gradient(180deg,var(--brand-500),var(--ice-200));
}
.step{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:22px 24px;
  margin-bottom:20px;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(28,134,184,.4);}
.step::before{
  content:attr(data-step);
  position:absolute;
  left:-34px;top:22px;
  width:24px;height:24px;
  border-radius:8px;
  background:var(--accent-500);
  color:#fff;
  font-size:12px;
  font-weight:700;
  display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:18px;margin-bottom:8px;}
.step p{color:var(--text-muted);font-size:15px;}

/* ============ 对照清单 ============ */
.compare-card{
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 24px;
  box-shadow:var(--shadow-1);
}
.compare-card--muted{background:#FBFDFE;}
.compare-card__head{
  display:flex;align-items:center;gap:10px;
  padding-bottom:14px;
  margin-bottom:16px;
  border-bottom:1px dashed var(--line);
}
.compare-card__head h3{font-size:18px;}
.compare-card__dot{
  width:10px;height:10px;border-radius:3px;background:var(--brand-500);
}
.compare-card--muted .compare-card__dot{background:var(--accent-500);}
.compare-row{
  display:flex;
  gap:14px;
  padding:12px 0;
  border-bottom:1px solid var(--line);
  align-items:flex-start;
}
.compare-row:last-child{border-bottom:0;padding-bottom:0;}
.compare-row__label{
  flex:0 0 96px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-700);
}
.compare-row__text{font-size:15px;color:var(--text-muted);}

/* ============ FAQ ============ */
.faq-side h2{font-size:32px;margin-bottom:14px;}
.faq-side p{color:var(--text-muted);font-size:15px;}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:12px;
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(28,134,184,.35);}
.faq-item.is-open{border-color:rgba(28,134,184,.5);box-shadow:var(--shadow-1);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  background:transparent;
  border:0;
  padding:20px 22px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--brand-900);
  cursor:pointer;
}
.faq-icon{
  position:relative;
  flex:0 0 20px;
  width:20px;height:20px;
  border:1.5px solid var(--brand-500);
  border-radius:6px;
  transition:transform .2s ease,border-color .2s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--brand-500);
  transition:background .2s ease;
}
.faq-icon::before{left:4px;right:4px;top:8.5px;height:1.5px;}
.faq-icon::after{top:4px;bottom:4px;left:8.5px;width:1.5px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:var(--accent-500);}
.faq-item.is-open .faq-icon::before,
.faq-item.is-open .faq-icon::after{background:var(--accent-500);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .2s ease;
}
.faq-a__inner{padding:0 22px 22px;}
.faq-a__inner p{font-size:15px;line-height:1.8;color:var(--text-muted);}

/* ============ CTA + 表单 ============ */
.cta-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:18px;
  padding:44px;
  box-shadow:var(--shadow-2);
}
.cta-panel h2{font-size:32px;margin-bottom:14px;}
.cta-panel > p{color:var(--text-muted);margin-bottom:26px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.form-field{display:flex;flex-direction:column;gap:8px;}
.form-field--full{grid-column:1 / -1;}
.form-field label{font-size:14px;font-weight:600;color:var(--brand-700);}
.form-field input,
.form-field textarea{
  width:100%;
  border:1px solid var(--line);
  border-radius:var(--radius-ctrl);
  background:#FBFDFE;
  padding:0 14px;
  height:48px;
  font-size:15px;
  color:var(--text);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.form-field textarea{height:118px;padding:12px 14px;resize:vertical;line-height:1.7;}
.form-field input:focus,
.form-field textarea:focus{
  outline:none;
  background:#fff;
  border-color:var(--brand-500);
  box-shadow:0 0 0 2px rgba(28,134,184,.18);
}
.form-note{font-size:13px;color:var(--text-muted);}
.form-actions{display:flex;justify-content:flex-end;align-items:center;gap:16px;margin-top:22px;flex-wrap:wrap;}
.form-alert{
  display:none;
  margin-top:16px;
  font-size:14px;
  color:var(--brand-700);
  background:var(--brand-100);
  border-radius:var(--radius-ctrl);
  padding:12px 16px;
}
.form-alert.is-show{display:block;}

/* ============ 侧栏要点条 ============ */
.callout-strip{
  display:flex;
  align-items:center;
  gap:14px;
  background:var(--brand-100);
  border-left:4px solid var(--brand-500);
  border-radius:10px;
  padding:16px 20px;
  color:var(--brand-700);
  font-size:15px;
  font-weight:500;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--brand-900);
  color:#C9DCE8;
  padding:72px 0 0;
  margin-top:0;
}
.site-footer h3{
  color:#fff;
  font-size:16px;
  font-weight:600;
  margin-bottom:18px;
}
.footer-brand p{
  color:#A9C4D6;
  font-size:14px;
  margin-top:16px;
  max-width:320px;
}
.site-footer .logo{color:#fff;font-size:17px;}
.site-footer .logo__mark{background:var(--brand-500);}
.site-footer .logo__text span{color:var(--ice-200);}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{color:#C9DCE8;font-size:14px;}
.footer-links a:hover{color:var(--ice-200);}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:14px;}
.footer-contact span{display:flex;align-items:center;gap:10px;color:#C9DCE8;}
.footer-contact i{color:var(--brand-500);}
.footer-bottom{
  margin-top:56px;
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:#93AFC2;
}

/* ============ 固定转化条 ============ */
.fixed-cta{
  position:fixed;
  left:0;right:0;bottom:0;
  height:64px;
  background:var(--surface);
  box-shadow:0 -12px 32px rgba(11,46,69,.10);
  z-index:80;
  display:flex;
  align-items:center;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
}
.fixed-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.fixed-cta__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.fixed-cta__text{font-size:15px;color:var(--text-muted);}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .cat-hero h1{font-size:36px;}
  .section-head h2,.split h2,.faq-side h2,.cta-panel h2{font-size:26px;}
  .section{padding:72px 0;}
}
@media (max-width:991px){
  .nav-menu{
    position:fixed;
    top:0;right:0;bottom:0;
    width:min(320px,86vw);
    background:var(--surface);
    flex-direction:column;
    align-items:flex-start;
    gap:4px;
    padding:88px 24px 32px;
    transform:translateX(100%);
    transition:transform .25s ease;
    z-index:75;
    box-shadow:var(--shadow-2);
    margin-left:0;
  }
  .nav-menu.is-open{transform:translateX(0);}
  .nav-menu a{
    width:100%;
    padding:14px 0;
    border-bottom:1px solid var(--line);
    font-size:16px;
  }
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .nav-icon{display:none;}
  .cat-hero{padding:32px 0 40px;}
  .cat-hero h1{font-size:30px;}
  .cat-hero__media{margin-top:28px;aspect-ratio:16/9;}
  .section{padding:60px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px;}
  .split__media{margin-bottom:24px;}
  .cta-panel{padding:28px 20px;}
  .form-grid{grid-template-columns:1fr;}
  .fixed-cta{opacity:1;visibility:visible;transform:none;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:575px){
  .container{padding:0 16px;}
  .cat-hero h1{font-size:28px;}
  .section-head h2,.split h2,.faq-side h2,.cta-panel h2{font-size:22px;}
  .cat-hero__actions{flex-direction:column;align-items:stretch;}
  .cat-hero__actions .btn{width:100%;}
  .steps{padding-left:28px;}
  .step{padding:18px 18px;}
  .compare-row{flex-direction:column;gap:4px;}
  .compare-row__label{flex:none;}
  .fixed-cta__text{display:none;}
  .fixed-cta__inner{justify-content:center;}
  .fixed-cta .btn{width:100%;}
  .form-actions .btn{width:100%;}
  .form-actions{justify-content:center;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category5 */
:root{
  --brand-900:#0B2E45;
  --brand-700:#12557A;
  --brand-500:#1C86B8;
  --brand-100:#E4F1F8;
  --ice-200:#CFEAF5;
  --accent-500:#FF7A29;
  --accent-600:#E8671A;
  --bg:#F7FAFC;
  --surface:#FFFFFF;
  --line:#E2EAF0;
  --text:#1D2A38;
  --text-muted:#5B6B7C;
  --radius-card:14px;
  --radius-ctl:10px;
  --radius-img:12px;
  --shadow-1:0 4px 12px rgba(11,46,69,.06);
  --shadow-2:0 12px 32px rgba(11,46,69,.10);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  padding-bottom:88px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-500);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-700);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;color:var(--brand-900);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
input,textarea{font-family:inherit;font-size:15px;}
:focus-visible{outline:3px solid rgba(28,134,184,.35);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section--ice{background:var(--brand-100);}
.section-head{margin-bottom:40px;}
.section-head h2{font-size:32px;}
.section-head p{margin-top:12px;color:var(--text-muted);font-size:15px;max-width:640px;}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--brand-700);background:var(--brand-100);border-radius:999px;padding:4px 12px;margin-bottom:14px;}

/* header */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease;}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--brand-900);font-weight:700;font-size:18px;line-height:1;}
.logo:hover{color:var(--brand-900);}
.logo__mark{width:36px;height:36px;border-radius:10px;background:var(--brand-900);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;letter-spacing:.5px;flex:0 0 36px;}
.logo__text span{color:var(--brand-500);}
.nav-menu{display:flex;align-items:center;gap:22px;font-size:15px;}
.nav-menu a{color:var(--text);font-weight:500;padding:6px 2px;border-bottom:2px solid transparent;transition:color .2s ease,border-color .2s ease;}
.nav-menu a:hover{color:var(--brand-700);}
.nav-menu a.is-active{color:var(--brand-700);border-bottom-color:var(--brand-500);font-weight:600;}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-icon{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--brand-700);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:background .2s ease,border-color .2s ease;}
.nav-icon:hover{background:var(--brand-100);border-color:var(--ice-200);}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--brand-700);cursor:pointer;align-items:center;justify-content:center;}
.nav-mask{position:fixed;inset:0;background:rgba(11,46,69,.45);opacity:0;pointer-events:none;transition:opacity .28s ease;z-index:85;}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:var(--radius-ctl);font-size:16px;font-weight:600;border:1.5px solid transparent;cursor:pointer;transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;}
.btn-primary{background:var(--accent-500);color:#fff;box-shadow:0 8px 20px rgba(255,122,41,.22);}
.btn-primary:hover{background:var(--accent-600);color:#fff;transform:translateY(-2px);}
.btn-secondary{background:transparent;border-color:var(--brand-500);color:var(--brand-700);}
.btn-secondary:hover{background:var(--brand-100);color:var(--brand-700);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand-500);font-weight:600;font-size:15px;}
.link-arrow i{transition:transform .2s ease;}
.link-arrow:hover i{transform:translateX(4px);}

/* hero */
.cat-hero{position:relative;background:linear-gradient(180deg,var(--brand-100) 0%,rgba(228,241,248,0) 100%);padding:56px 0 64px;}
.breadcrumb{font-size:13px;color:var(--text-muted);margin-bottom:16px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.breadcrumb a{color:var(--text-muted);}
.breadcrumb a:hover{color:var(--brand-500);}
.breadcrumb .sep{color:var(--ice-200);}
.breadcrumb .current{color:var(--brand-500);font-weight:600;}
.cat-hero__title{font-size:44px;letter-spacing:-.2px;}
.cat-hero__lead{margin-top:18px;font-size:16px;color:var(--text-muted);max-width:620px;}
.hero-actions{margin-top:28px;display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
.media-frame{position:relative;border-radius:var(--radius-card);overflow:hidden;background:var(--brand-100);}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame--hero{aspect-ratio:16/10;box-shadow:var(--shadow-2);}
.trust-row{margin-top:26px;display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--text-muted);}
.trust-row .dot{width:4px;height:4px;border-radius:50%;background:var(--ice-200);}

/* point cards */
.point-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow-1);height:100%;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;}
.point-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(28,134,184,.4);}
.point-card__top{display:flex;align-items:center;gap:14px;margin-bottom:14px;}
.point-card__idx{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;font-variant-numeric:tabular-nums;background:var(--brand-100);color:var(--brand-700);}
.point-card__idx--accent{background:rgba(255,122,41,.12);color:var(--accent-600);}
.point-card h3{font-size:20px;}
.point-card p{color:var(--text-muted);font-size:15px;}
.point-card ul{margin-top:12px;}
.point-card li{position:relative;padding-left:16px;font-size:15px;color:var(--text-muted);margin-top:8px;}
.point-card li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:2px;background:var(--brand-500);}

/* timeline */
.timeline{position:relative;margin-top:8px;}
.timeline::before{content:"";position:absolute;left:19px;top:12px;bottom:12px;width:2px;background:var(--ice-200);}
.timeline-item{position:relative;padding-left:68px;margin-bottom:26px;}
.timeline-item:last-child{margin-bottom:0;}
.timeline-item__num{position:absolute;left:0;top:0;width:40px;height:40px;border-radius:10px;background:#fff;border:1px solid var(--line);color:var(--brand-500);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;box-shadow:var(--shadow-1);font-variant-numeric:tabular-nums;}
.timeline-item h3{font-size:18px;}
.timeline-item p{color:var(--text-muted);font-size:15px;margin-top:6px;}

/* split */
.split-media{border-radius:var(--radius-img);overflow:hidden;background:var(--brand-100);aspect-ratio:4/3;box-shadow:var(--shadow-1);}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-text h2{font-size:32px;}
.split-text h3{font-size:18px;margin-top:22px;}
.split-text p{margin-top:14px;color:var(--text-muted);font-size:16px;}
.split-text .link-arrow{margin-top:18px;}

/* spec compare */
.spec-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;height:100%;}
.spec-card__head{background:var(--brand-100);padding:18px 24px;font-weight:600;color:var(--brand-700);font-size:15px;}
.spec-row{display:flex;justify-content:space-between;gap:16px;padding:16px 24px;border-bottom:1px solid var(--line);font-size:15px;}
.spec-row:last-child{border-bottom:none;}
.spec-row span:first-child{color:var(--text-muted);}
.spec-row span:last-child{color:var(--brand-900);font-weight:600;text-align:right;}

/* faq */
.faq-list{margin:0;}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;box-shadow:var(--shadow-1);overflow:hidden;}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;background:none;border:0;padding:20px 22px;font-size:16px;font-weight:600;color:var(--brand-900);cursor:pointer;}
.faq-q:hover{color:var(--brand-700);}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 18px;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand-500);border-radius:2px;transition:background .2s ease;}
.faq-icon::before{left:0;top:8px;width:18px;height:2px;}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);transition:transform .2s ease;}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--accent-500);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq-a__inner{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--text-muted);}
.faq-aside h2{font-size:32px;}
.faq-aside p{margin-top:14px;color:var(--text-muted);font-size:15px;}
.faq-aside .btn{margin-top:22px;}

/* cta + form */
.cta-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:32px;}
.cta-panel h2{font-size:26px;}
.cta-panel > p{margin-top:12px;color:var(--text-muted);font-size:15px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px;}
.form-field{display:flex;flex-direction:column;gap:8px;}
.form-field.full{grid-column:1/-1;}
.form-field label{font-size:14px;font-weight:600;color:var(--brand-900);}
.form-field input,.form-field textarea{width:100%;height:48px;border-radius:var(--radius-ctl);border:1px solid var(--line);background:#fff;padding:0 14px;color:var(--text);transition:border-color .2s ease,box-shadow .2s ease;}
.form-field textarea{height:112px;padding:12px 14px;resize:vertical;line-height:1.7;}
.form-field input:focus,.form-field textarea:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 2px rgba(28,134,184,.18);}
.form-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:20px;flex-wrap:wrap;}
.form-note{font-size:13px;color:var(--text-muted);}
.form-tip{font-size:13px;color:var(--accent-600);margin-top:14px;display:none;}
.form-tip.is-visible{display:block;}

/* footer */
.site-footer{background:var(--brand-900);color:#D7E5EE;padding:56px 0 24px;font-size:14px;}
.site-footer h3{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600;}
.site-footer .logo{color:#fff;font-size:17px;margin-bottom:14px;}
.site-footer .logo__mark{background:#fff;color:var(--brand-900);}
.site-footer .logo__text span{color:var(--ice-200);}
.footer-brand p{color:#A9C2D3;max-width:320px;line-height:1.8;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:#C6DCE9;}
.footer-links a:hover{color:var(--ice-200);}
.footer-contact{display:flex;flex-direction:column;gap:10px;color:#C6DCE9;}
.footer-contact i{color:var(--ice-200);margin-right:8px;}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#9DB6C6;font-size:13px;}

/* sticky bar */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:70;background:#fff;box-shadow:0 -8px 24px rgba(11,46,69,.10);transform:translateY(110%);opacity:0;transition:transform .3s ease,opacity .3s ease;}
.sticky-cta.is-visible{transform:none;opacity:1;}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px;}
.sticky-inner p{font-size:15px;color:var(--brand-900);font-weight:600;}
.sticky-inner span{font-size:13px;color:var(--text-muted);}

@media (max-width:1199px){
  .cat-hero__title{font-size:36px;}
  .section-head h2,.split-text h2,.faq-aside h2{font-size:26px;}
}
@media (max-width:991px){
  body{padding-bottom:96px;}
  .section{padding:72px 0;}
  .cat-hero{padding:40px 0 52px;}
  .cat-hero__title{font-size:32px;}
  .media-frame--hero{margin-top:32px;}
  .nav-toggle{display:inline-flex;}
  .nav-menu{position:fixed;top:0;right:0;height:100vh;width:290px;background:#fff;flex-direction:column;align-items:flex-start;gap:4px;padding:84px 24px 32px;transform:translateX(100%);transition:transform .28s ease;z-index:90;box-shadow:var(--shadow-2);overflow-y:auto;}
  .nav-menu.is-open{transform:none;}
  .nav-menu a{width:100%;padding:12px 0;border-bottom:1px solid var(--line);font-size:16px;}
  .nav-menu a.is-active{border-bottom-color:var(--line);}
  .nav-mask.is-open{opacity:1;pointer-events:auto;}
  .nav-icon{display:none;}
  .split-media{margin-bottom:24px;}
  .faq-aside{margin-bottom:32px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .cat-hero__title{font-size:28px;}
  .section{padding:56px 0;}
  .section-head h2,.split-text h2,.faq-aside h2{font-size:22px;}
  .point-card h3{font-size:18px;}
  .cta-panel{padding:24px;}
  .form-grid{grid-template-columns:1fr;}
  .hero-actions .btn,.cta-panel .btn{width:100%;}
  .sticky-cta{transform:none;opacity:1;}
  .sticky-inner span{display:none;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:575px){
  .nav-inner{height:56px;}
  .logo__text{font-size:16px;}
  .cat-hero__title{font-size:26px;}
  .btn{height:46px;font-size:15px;}
  .spec-row{flex-direction:column;gap:4px;}
  .spec-row span:last-child{text-align:left;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}