/* roulang page: index */
:root{
  --brand:#2B5FD9;
  --brand-600:#1F4CB8;
  --brand-050:#EDF3FE;
  --accent:#E8873A;
  --accent-soft:#FDF1E6;
  --ink:#0F1A2E;
  --ink-600:#475467;
  --line:#E4EAF4;
  --surface:#FFFFFF;
  --bg:#F7F9FC;
  --success:#1E9E7A;
  --danger:#D64545;
  --r-card:16px;
  --r-lg:20px;
  --r-img:12px;
  --r-btn:12px;
  --r-input:10px;
  --r-tag:8px;
  --shadow:0 8px 24px rgba(16,24,40,.06);
  --shadow-hover:0 14px 32px rgba(16,24,40,.10);
  --shadow-nav:0 10px 28px rgba(16,24,40,.08);
  --bs-primary:#2B5FD9;
  --bs-primary-rgb:43,95,217;
  --bs-body-color:#475467;
  --bs-body-bg:#F7F9FC;
  --bs-border-color:#E4EAF4;
  --bs-border-radius:12px;
  --bs-link-color:#2B5FD9;
  --bs-link-hover-color:#1F4CB8;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-600);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-600);}
h1,h2,h3,h4{color:var(--ink);font-weight:600;line-height:1.35;margin:0;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section-sm{padding:64px 0;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  padding:22px 16px 6px;
  transition:padding .2s ease-in-out;
  background:linear-gradient(180deg,rgba(247,249,252,.98) 0%,rgba(247,249,252,.86) 70%,rgba(247,249,252,0) 100%);
}
.site-header.is-stuck{padding-top:12px;padding-bottom:8px;}
.nav-shell{
  max-width:1240px;
  margin:0 auto;
  height:72px;
  display:flex;
  align-items:center;
  gap:20px;
  padding:0 18px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:16px;
  box-shadow:var(--shadow-nav);
  transition:height .2s ease-in-out, box-shadow .2s ease-in-out;
}
.site-header.is-stuck .nav-shell{height:60px;box-shadow:0 12px 30px rgba(16,24,40,.10);}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:700;
}
.brand-word{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;}
.brand-sub{display:block;font-size:12px;color:var(--ink-600);font-weight:400;letter-spacing:.02em;}
.nav-list{display:flex;align-items:center;gap:6px;margin-left:12px;flex:1 1 auto;}
.nav-list a{
  display:block;
  padding:8px 14px;
  font-size:15px;
  color:var(--ink-600);
  border-radius:8px;
  transition:background .18s ease,color .18s ease;
}
.nav-list a:hover{background:var(--brand-050);color:var(--brand);}
.nav-list a.active{background:var(--brand-050);color:var(--brand);font-weight:600;}
.nav-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-burger{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  color:var(--ink);
  font-size:20px;
  align-items:center;justify-content:center;
}
.nav-burger:hover{background:var(--brand-050);color:var(--brand);}

/* ---------- buttons ---------- */
.btn-brand{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#fff;
  border:1px solid var(--brand);
  border-radius:var(--r-btn);
  padding:12px 24px;
  font-size:16px;font-weight:600;
  transition:background .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-brand:hover{background:var(--brand-600);border-color:var(--brand-600);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(43,95,217,.22);}
.btn-brand:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;color:var(--brand);
  border:1px solid var(--brand);
  border-radius:var(--r-btn);
  padding:12px 24px;
  font-size:16px;font-weight:600;
  transition:background .18s ease,color .18s ease;
}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-600);}
.btn-line{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;color:var(--ink);
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  padding:12px 24px;
  font-size:16px;font-weight:600;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.btn-line:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-050);}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:var(--r-btn);}
.text-link{color:var(--brand);font-weight:600;}
.text-link:hover{text-decoration:underline;}

/* ---------- tags ---------- */
.tag{
  display:inline-block;
  padding:4px 10px;
  font-size:13px;
  border-radius:var(--r-tag);
  background:var(--brand-050);
  color:var(--brand);
  font-weight:600;
}
.tag-accent{background:var(--accent-soft);color:#B65F19;}
.eyebrow{
  display:inline-block;
  padding:5px 12px;
  font-size:13px;
  font-weight:600;
  color:var(--brand);
  background:var(--brand-050);
  border-radius:var(--r-tag);
  margin-bottom:18px;
}

/* ---------- section head ---------- */
.sec-head{max-width:780px;margin-bottom:44px;}
.sec-head h2{font-size:28px;font-weight:600;letter-spacing:-.01em;margin-bottom:12px;}
.sec-head p{font-size:17px;color:var(--ink-600);}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}

/* ---------- cards ---------- */
.card-soft{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow);
  transition:transform .18s ease,box-shadow .18s ease;
}
.card-soft:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.card-pad{padding:28px;}

/* ---------- hero ---------- */
.hero{padding:44px 0 72px;}
.hero-title{font-size:40px;font-weight:700;letter-spacing:-.01em;line-height:1.28;margin-bottom:20px;}
.hero-lead{font-size:17px;line-height:1.8;color:var(--ink-600);margin-bottom:28px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px;}
.hero-kpis{display:flex;flex-wrap:wrap;gap:28px;padding-top:24px;border-top:1px solid var(--line);}
.hero-kpi strong{
  display:block;
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:22px;
  color:var(--brand);
  font-weight:700;
  line-height:1.2;
}
.hero-kpi span{font-size:14px;color:var(--ink-600);}
.hero-visual{position:relative;padding:6px 6px 6px 0;}
.hero-visual::before{
  content:"";
  position:absolute;
  left:34px;right:-14px;top:44px;bottom:-16px;
  background:var(--brand-050);
  border-radius:var(--r-lg);
  z-index:0;
}
.hero-visual img{
  position:relative;
  z-index:1;
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  border-radius:var(--r-lg);
  box-shadow:0 18px 40px rgba(16,24,40,.12);
}
.hero-badge{
  position:absolute;
  z-index:2;
  left:-8px;
  bottom:26px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:var(--shadow-hover);
  padding:14px 18px;
  display:flex;
  align-items:center;
  gap:10px;
}
.hero-badge i{color:var(--brand);font-size:20px;}
.hero-badge b{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--ink);font-size:18px;}
.hero-badge em{font-style:normal;font-size:13px;color:var(--ink-600);display:block;}

/* ---------- metrics ---------- */
.metric{padding:26px 24px;position:relative;height:100%;}
.metric-num{
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:44px;
  font-weight:700;
  color:var(--brand);
  line-height:1.1;
}
.metric-num small{font-size:18px;margin-left:4px;color:var(--ink-600);font-weight:600;}
.metric-label{font-size:14px;color:var(--ink-600);margin-top:10px;}
.metric-trend{
  position:absolute;top:18px;right:18px;
  font-size:12px;
  padding:3px 9px;
  border-radius:var(--r-tag);
  background:var(--accent-soft);
  color:#B65F19;
  font-weight:600;
}

/* ---------- tiles ---------- */
.tile{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  background:#fff;
  transition:box-shadow .18s ease,transform .18s ease;
}
.tile:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.tile img{width:100%;height:100%;object-fit:cover;display:block;}
.tile-lg img{aspect-ratio:16/10;}
.tile-sm img{aspect-ratio:16/9;}
.tile-body{
  position:absolute;left:0;right:0;bottom:0;
  padding:22px;
  color:#fff;
  background:linear-gradient(to top,rgba(15,26,46,.88) 0%,rgba(15,26,46,.42) 58%,rgba(15,26,46,0) 100%);
}
.tile-body h3{color:#fff;font-size:20px;margin-bottom:6px;}
.tile-body p{font-size:14px;color:rgba(255,255,255,.86);margin:0;}
.tile-arrow{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:12px;font-size:14px;font-weight:600;color:#fff;
}
.tile:hover .tile-arrow{color:#fff;text-decoration:underline;}

/* ---------- matrix ---------- */
.matrix-big{padding:32px;height:100%;display:flex;flex-direction:column;justify-content:space-between;}
.matrix-big h3{font-size:22px;margin-bottom:12px;}
.matrix-side{padding:28px;height:100%;}
.matrix-list li{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);}
.matrix-list li:last-child{border-bottom:0;padding-bottom:0;}
.matrix-idx{
  flex:0 0 26px;height:26px;border-radius:8px;
  background:var(--brand-050);color:var(--brand);
  font-family:var(--mono);font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.matrix-img{border-radius:var(--r-img);aspect-ratio:16/10;object-fit:cover;margin-bottom:16px;}
.matrix-plain{padding:28px;height:100%;background:var(--brand-050);border:1px solid #DDE7FA;border-radius:var(--r-card);}
.matrix-plain h3{font-size:18px;margin-bottom:10px;}
.matrix-plain p{font-size:15px;color:var(--ink-600);}

/* ---------- scenarios ---------- */
.chip-row{display:flex;gap:10px;overflow-x:auto;padding-bottom:14px;margin-bottom:28px;scrollbar-width:thin;}
.chip{
  flex:0 0 auto;
  padding:8px 16px;
  font-size:14px;
  border-radius:var(--r-tag);
  background:var(--brand-050);
  color:var(--brand);
  border:1px solid transparent;
  font-weight:600;
}
.chip:hover{background:var(--brand);color:#fff;}
.scene-card{height:100%;overflow:hidden;padding:0;}
.scene-card img{aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-card) var(--r-card) 0 0;}
.scene-body{padding:22px;}
.scene-body h3{font-size:18px;margin-bottom:8px;}
.scene-body p{font-size:15px;color:var(--ink-600);}

/* ---------- compare ---------- */
.cmp-wrap{border:1px solid var(--line);border-radius:var(--r-card);background:#fff;box-shadow:var(--shadow);padding:32px;}
.cmp-item{padding:22px 0;border-bottom:1px solid var(--line);}
.cmp-item:last-child{border-bottom:0;padding-bottom:0;}
.cmp-item:first-child{padding-top:0;}
.cmp-label{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:14px;}
.cmp-line{display:flex;align-items:center;gap:14px;margin-bottom:10px;}
.cmp-tag{flex:0 0 96px;font-size:13px;color:var(--ink-600);}
.cmp-tag.win{color:var(--brand);font-weight:600;}
.cmp-bar{flex:1 1 auto;height:10px;border-radius:999px;background:#EEF2F8;overflow:hidden;}
.cmp-fill{display:block;height:100%;border-radius:999px;background:#C7D2E4;}
.cmp-fill.win{background:var(--brand);}
.cmp-val{flex:0 0 92px;text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--ink-600);}
.cmp-val.win{color:var(--success);font-weight:700;}
.w-42{width:42%;}
.w-55{width:55%;}
.w-60{width:60%;}
.w-88{width:88%;}
.w-92{width:92%;}
.w-95{width:95%;}
.w-100p{width:100%;}

/* ---------- timeline ---------- */
.tl{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:18px;padding-top:52px;}
.tl::before{content:"";position:absolute;top:16px;left:8%;right:8%;height:2px;background:var(--line);}
.tl-node{position:relative;text-align:center;padding:0 6px;}
.tl-node::before{
  content:"";position:absolute;top:-42px;left:50%;transform:translateX(-50%);
  width:14px;height:14px;border-radius:50%;
  background:var(--brand);border:3px solid #fff;box-shadow:0 0 0 1px var(--line);
}
.tl-node.active::before{background:var(--accent);}
.tl-node h4{font-size:16px;margin-bottom:8px;}
.tl-node p{font-size:14px;color:var(--ink-600);}
.tl-year{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--brand);font-weight:700;display:block;margin-bottom:6px;}

/* ---------- news ---------- */
.news-main{overflow:hidden;padding:0;height:100%;}
.news-main img{aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-card) var(--r-card) 0 0;}
.news-main-body{padding:26px;}
.news-main-body h3{font-size:22px;margin-bottom:12px;}
.news-meta{font-size:13px;color:var(--ink-600);display:flex;gap:14px;margin-top:16px;}
.news-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line);}
.news-item:last-child{border-bottom:0;padding-bottom:0;}
.news-item:first-child{padding-top:0;}
.news-item h4{font-size:16px;margin-bottom:6px;}
.news-item p{font-size:14px;color:var(--ink-600);margin:0;}
.news-idx{font-family:var(--mono);font-size:14px;font-weight:700;color:var(--brand);flex:0 0 28px;}

/* ---------- guarantee ---------- */
.guarantee{background:var(--brand-050);padding:64px 0;}
.gu-item{display:flex;gap:16px;align-items:flex-start;}
.gu-icon{
  flex:0 0 44px;height:44px;border-radius:12px;
  background:#fff;color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:20px;
}
.gu-item h4{font-size:16px;margin-bottom:6px;}
.gu-item p{font-size:14px;color:var(--ink-600);margin:0;}

/* ---------- quick answers ---------- */
.qa-item{border-left:3px solid var(--brand);padding:2px 0 2px 16px;margin-bottom:28px;}
.qa-item:last-child{margin-bottom:0;}
.qa-q{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:6px;}
.qa-a{font-size:15px;color:var(--ink-600);margin:0;line-height:1.75;}

/* ---------- faq ---------- */
.faq-acc{max-width:860px;margin:0 auto;}
.faq-acc .accordion-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:var(--shadow);
}
.faq-acc .accordion-button{
  font-weight:600;
  font-size:16px;
  color:var(--ink);
  background:#fff;
  padding:20px 22px;
  box-shadow:none;
  display:flex;
  align-items:center;
}
.faq-acc .accordion-button:not(.collapsed){color:var(--brand);background:var(--brand-050);}
.faq-acc .accordion-button::after{display:none;}
.faq-acc .accordion-button .chev{
  margin-left:auto;
  font-size:16px;
  color:var(--ink-600);
  transition:transform .2s ease,color .2s ease;
}
.faq-acc .accordion-button:not(.collapsed) .chev{transform:rotate(180deg);color:var(--brand);}
.faq-acc .accordion-body{padding:4px 22px 22px;font-size:15px;color:var(--ink-600);line-height:1.8;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow);padding:26px 24px;}
.step::after{
  content:"";position:absolute;top:46px;right:-12px;width:24px;height:2px;
  background:repeating-linear-gradient(90deg,var(--line) 0 4px,transparent 4px 8px);
}
.step:last-child::after{display:none;}
.step-num{
  width:42px;height:42px;border-radius:999px;
  background:var(--brand-050);color:var(--brand);
  font-family:var(--mono);font-weight:700;font-size:16px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;
}
.step h4{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--ink-600);margin:0;}

/* ---------- reviews ---------- */
.review{padding:26px;height:100%;}
.review-head{display:flex;align-items:center;gap:14px;margin-bottom:16px;}
.avatar{
  width:48px;height:48px;border-radius:50%;
  background:var(--brand-050);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:18px;
}
.review-head b{display:block;font-size:16px;color:var(--ink);}
.review-head span{font-size:13px;color:var(--ink-600);}
.stars{color:var(--accent);font-size:14px;letter-spacing:2px;}
.review p{font-size:15px;color:var(--ink-600);margin:0;}

/* ---------- form ---------- */
.cta-band{background:var(--brand-050);padding:88px 0;}
.form-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-hover);
  padding:36px;
}
.form-side{position:relative;border-radius:var(--r-lg);overflow:hidden;min-height:280px;height:100%;}
.form-side img{width:100%;height:100%;object-fit:cover;opacity:.9;}
.form-label{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:6px;}
.form-label .req{color:var(--accent);margin-left:4px;}
.form-control,.form-select{
  border:1px solid var(--line);
  border-radius:var(--r-input);
  padding:12px 14px;
  font-size:15px;
  color:var(--ink);
  background:#fff;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.form-control:focus,.form-select:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(43,95,217,.10);
}
.alert-bar{
  display:flex;align-items:flex-start;gap:10px;
  border-radius:12px;
  padding:14px 18px;
  font-size:15px;
  margin-bottom:22px;
  border-left:4px solid var(--brand);
  background:var(--brand-050);
  color:var(--ink);
}
.alert-bar.ok{border-left-color:var(--success);background:#EAF7F2;}
.alert-bar.err{border-left-color:var(--danger);background:#FDECEC;}

/* ---------- footer ---------- */
.site-footer{background:#F1F5FB;border-top:1px solid var(--line);padding:64px 0 24px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-title{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:16px;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:var(--ink-600);}
.footer-links a:hover{color:var(--brand);}
.footer-note{color:var(--ink-600);line-height:1.8;margin:0 0 14px;}
.footer-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  color:var(--ink-600);font-size:13px;
}

/* ---------- offcanvas ---------- */
.offcanvas.mobile-menu{
  top:12px;bottom:12px;right:12px;height:auto;
  width:330px;max-width:calc(100% - 24px);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-hover);
}
.mobile-menu .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px;}
.mobile-menu .offcanvas-body{padding:18px 20px;}
.mobile-nav a{
  display:block;
  padding:12px 14px;
  border-radius:10px;
  color:var(--ink-600);
  font-size:15px;
  margin-bottom:4px;
}
.mobile-nav a:hover,.mobile-nav a.active{background:var(--brand-050);color:var(--brand);font-weight:600;}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .hero-title{font-size:36px;}
  .tl{grid-template-columns:repeat(3,1fr);gap:24px;}
  .tl::before{display:none;}
  .tl-node::before{display:none;}
  .tl{padding-top:0;}
}
@media (max-width:991.98px){
  .section{padding:64px 0;}
  .section-sm{padding:48px 0;}
  .nav-list,.nav-cta .btn-brand{display:none;}
  .nav-burger{display:inline-flex;}
  .hero{padding:24px 0 56px;}
  .hero-title{font-size:30px;}
  .hero-visual{padding:0;margin-top:12px;}
  .hero-visual::before{display:none;}
  .hero-badge{position:static;margin-top:16px;display:inline-flex;}
  .metric-num{font-size:36px;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .step::after{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .guarantee,.cta-band{padding:56px 0;}
  .cmp-wrap{padding:24px;}
  .form-card{padding:26px;}
}
@media (max-width:767.98px){
  .container{padding:0 18px;}
  .hero-title{font-size:28px;line-height:1.32;}
  .sec-head h2{font-size:22px;}
  .sec-head p{font-size:16px;}
  .tl{grid-template-columns:1fr;gap:22px;padding-left:22px;border-left:2px solid var(--line);}
  .tl-node{text-align:left;}
  .cmp-line{flex-wrap:wrap;gap:8px;}
  .cmp-tag{flex:0 0 100%;}
  .cmp-val{flex:0 0 auto;text-align:left;}
  .cmp-bar{flex:0 0 100%;}
  .matrix-plain{padding:22px;}
  .card-pad{padding:22px;}
  .metric-num{font-size:32px;}
}
@media (max-width:575.98px){
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-cta .btn-brand,.hero-cta .btn-ghost{width:100%;justify-content:center;}
  .metric{padding:22px 20px;}
  .hero-kpis{gap:18px;}
}

/* roulang page: category1 */
:root{
 --brand:#2B5FD9;
 --brand-600:#1F4CB8;
 --brand-050:#EDF3FE;
 --accent:#E8873A;
 --accent-soft:#FDF1E6;
 --ink:#0F1A2E;
 --ink-600:#475467;
 --line:#E4EAF4;
 --surface:#FFFFFF;
 --bg:#F7F9FC;
 --success:#1E9E7A;
 --danger:#D64545;
 --r-card:16px;
 --r-lg:20px;
 --r-img:12px;
 --r-btn:12px;
 --r-input:10px;
 --r-tag:8px;
 --shadow:0 8px 24px rgba(16,24,40,.06);
 --shadow-hover:0 14px 32px rgba(16,24,40,.10);
 --shadow-nav:0 10px 28px rgba(16,24,40,.08);
 --bs-primary:#2B5FD9;
 --bs-primary-rgb:43,95,217;
 --bs-body-color:#475467;
 --bs-body-bg:#F7F9FC;
 --bs-border-color:#E4EAF4;
 --bs-border-radius:12px;
 --bs-link-color:#2B5FD9;
 --bs-link-hover-color:#1F4CB8;
 --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
 --mono:ui-monospace,"SFMono-Regular",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
 margin:0;
 font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
 font-size:16px;
 line-height:1.75;
 color:var(--ink-600);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-600);}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink);margin:0 0 14px;letter-spacing:-.01em;}
h1{font-size:40px;font-weight:700;line-height:1.28;}
h2{font-size:28px;font-weight:600;line-height:1.4;}
h3{font-size:20px;font-weight:600;line-height:1.5;}
p{margin:0 0 1.2em;}
ul{list-style:none;margin:0;padding:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section-sm{padding:56px 0;}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ---------- 导航 ---------- */
.site-header{
 position:sticky;
 top:0;
 z-index:1030;
 padding:22px 16px 6px;
 transition:padding .2s ease-in-out;
 background:linear-gradient(180deg,rgba(247,249,252,.98) 0%,rgba(247,249,252,.86) 70%,rgba(247,249,252,0) 100%);
}
.site-header.is-stuck{padding-top:12px;padding-bottom:8px;}
.nav-shell{
 max-width:1240px;
 margin:0 auto;
 height:72px;
 display:flex;
 align-items:center;
 gap:20px;
 padding:0 18px;
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:16px;
 box-shadow:var(--shadow-nav);
 transition:height .2s ease-in-out, box-shadow .2s ease-in-out;
}
.site-header.is-stuck .nav-shell{height:60px;box-shadow:0 12px 30px rgba(16,24,40,.10);}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
 width:36px;height:36px;border-radius:10px;
 background:var(--brand);color:#fff;
 display:flex;align-items:center;justify-content:center;
 font-size:18px;font-weight:700;flex:0 0 auto;
}
.brand-word{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;display:block;line-height:1.3;}
.brand-sub{display:block;font-size:12px;color:var(--ink-600);font-weight:400;letter-spacing:.02em;}
.nav-list{display:flex;align-items:center;gap:6px;margin-left:12px;flex:1 1 auto;flex-wrap:wrap;}
.nav-list a{
 display:block;
 padding:8px 14px;
 font-size:15px;
 color:var(--ink-600);
 border-radius:8px;
 transition:background .18s ease,color .18s ease;
}
.nav-list a:hover{background:var(--brand-050);color:var(--brand);}
.nav-list a.active{background:var(--brand-050);color:var(--brand);font-weight:600;}
.nav-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-burger{
 display:none;
 width:42px;height:42px;
 border:1px solid var(--line);
 border-radius:12px;
 background:#fff;
 color:var(--ink);
 font-size:20px;
 align-items:center;justify-content:center;
}
.nav-burger:hover{background:var(--brand-050);color:var(--brand);}
.offcanvas{border-radius:16px;margin:12px;height:calc(100% - 24px);max-width:320px;border:1px solid var(--line);}
.offcanvas-header{border-bottom:1px solid var(--line);}
.m-nav-list{display:flex;flex-direction:column;gap:4px;margin-bottom:20px;}
.m-nav-list a{display:block;padding:12px 14px;border-radius:10px;color:var(--ink);font-size:16px;}
.m-nav-list a:hover{background:var(--brand-050);color:var(--brand);}
.m-nav-list a.active{background:var(--brand-050);color:var(--brand);font-weight:600;}

/* ---------- 按钮 ---------- */
.btn-brand{
 display:inline-flex;align-items:center;gap:8px;
 background:var(--brand);color:#fff;
 border:1px solid var(--brand);
 border-radius:var(--r-btn);
 padding:12px 24px;
 font-size:16px;font-weight:600;
 transition:background .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-brand:hover{background:var(--brand-600);border-color:var(--brand-600);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(43,95,217,.22);}
.btn-brand:active{transform:translateY(0);}
.btn-ghost{
 display:inline-flex;align-items:center;gap:8px;
 background:#fff;color:var(--brand);
 border:1px solid var(--brand);
 border-radius:var(--r-btn);
 padding:12px 24px;
 font-size:16px;font-weight:600;
 transition:background .18s ease,color .18s ease;
}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-600);}
.btn-line{
 display:inline-flex;align-items:center;gap:8px;
 background:#fff;color:var(--ink);
 border:1px solid var(--line);
 border-radius:var(--r-btn);
 padding:12px 24px;
 font-size:16px;font-weight:600;
 transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.btn-line:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-050);}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:var(--r-btn);}
.text-link{color:var(--brand);font-weight:600;}
.text-link:hover{text-decoration:underline;}

/* ---------- 标签 ---------- */
.tag{
 display:inline-block;
 padding:4px 10px;
 font-size:13px;
 border-radius:var(--r-tag);
 background:var(--brand-050);
 color:var(--brand);
 font-weight:600;
}
.tag-accent{background:var(--accent-soft);color:#B65F19;}

/* ---------- 分类页头 ---------- */
.cat-head{background:var(--surface);border-bottom:1px solid var(--line);padding:40px 0 44px;}
.breadcrumb-line{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-600);margin-bottom:18px;}
.breadcrumb-line .sep{color:#B4C0D4;}
.cat-head-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;align-items:end;}
.cat-title{font-size:40px;font-weight:700;line-height:1.28;margin-bottom:16px;}
.cat-title span{color:var(--brand);}
.cat-desc{font-size:17px;line-height:1.8;max-width:640px;margin:0;}
.cat-stats{
 background:var(--brand-050);
 border:1px solid #D7E3FB;
 border-radius:var(--r-card);
 padding:22px 24px;
}
.cat-stats .stat-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;font-size:14px;color:var(--ink-600);}
.cat-stats .stat-row + .stat-row{margin-top:14px;padding-top:14px;border-top:1px dashed #C9DAFA;}
.cat-stats .stat-num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:20px;font-weight:700;color:var(--brand);}
.cat-stats .stat-num.accent{color:var(--accent);}

/* ---------- 筛选条 ---------- */
.filter-bar{
 display:flex;flex-wrap:wrap;align-items:center;gap:14px;
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--r-card);
 box-shadow:var(--shadow);
 padding:16px 20px;
}
.filter-bar .form-control,
.filter-bar .form-select{
 border-radius:var(--r-input);
 border:1px solid var(--line);
 padding:10px 14px;
 font-size:15px;
 color:var(--ink);
 background-color:#fff;
 box-shadow:none;
}
.filter-bar .form-control:focus,
.filter-bar .form-select:focus{
 border-color:var(--brand);
 box-shadow:0 0 0 3px rgba(43,95,217,.14);
}
.filter-search{flex:1 1 260px;min-width:200px;}
.filter-sort{flex:0 1 190px;}
.filter-count{font-size:14px;color:var(--ink-600);}
.view-toggle{display:flex;gap:6px;margin-left:auto;}
.view-toggle button{
 width:42px;height:42px;
 display:inline-flex;align-items:center;justify-content:center;
 border:1px solid var(--line);
 background:#fff;
 border-radius:10px;
 color:var(--ink-600);
 font-size:18px;
 transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.view-toggle button:hover{background:var(--brand-050);color:var(--brand);}
.view-toggle button.is-active{background:var(--brand-050);color:var(--brand);border-color:#C9DAFA;}

/* ---------- 列表主体 ---------- */
.list-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;}
.list-head h2{margin-bottom:6px;}
.list-head p{margin:0;font-size:15px;color:var(--ink-600);}
.grid-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.media-card{
 display:flex;flex-direction:column;
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--r-card);
 box-shadow:var(--shadow);
 overflow:hidden;
 color:inherit;
 transition:transform .18s ease,box-shadow .18s ease;
}
.media-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);color:inherit;}
.media-thumb{aspect-ratio:16/10;overflow:hidden;background:#EEF2F9;}
.media-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.media-card:hover .media-thumb img{transform:scale(1.02);}
.media-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto;gap:10px;}
.media-title{font-size:17px;font-weight:600;line-height:1.5;color:var(--ink);margin:0;}
.media-card:hover .media-title{color:var(--brand);}
.media-sum{
 font-size:14px;line-height:1.7;color:var(--ink-600);margin:0;
 display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.media-meta{
 display:flex;align-items:center;justify-content:space-between;gap:10px;
 margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
 font-size:13px;color:var(--ink-600);
}
.media-meta .date{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em;}
.grid-cards.is-list{grid-template-columns:1fr;gap:16px;}
.grid-cards.is-list .media-card{flex-direction:row;}
.grid-cards.is-list .media-thumb{width:300px;flex:0 0 300px;}
.grid-cards.is-list .media-body{padding:22px 24px;}
.empty-tip{
 display:none;
 padding:26px;
 border:1px dashed #C9DAFA;
 border-radius:var(--r-card);
 background:var(--brand-050);
 color:var(--brand);
 font-size:15px;
 text-align:center;
}
.empty-tip.is-show{display:block;}

/* ---------- 查看更多与分页 ---------- */
.more-wrap{text-align:center;margin-top:34px;}
.pager{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:26px;}
.pager a,.pager span{
 min-width:42px;height:42px;
 display:inline-flex;align-items:center;justify-content:center;
 padding:0 12px;
 border:1px solid var(--line);
 border-radius:8px;
 background:#fff;
 color:var(--ink-600);
 font-size:15px;
 font-family:var(--mono);
 transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.pager a:hover{background:var(--brand-050);color:var(--brand);border-color:#C9DAFA;}
.pager .is-current{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:700;}
.pager .is-ellipsis{border-color:transparent;background:transparent;}

/* ---------- 栏目说明 ---------- */
.prose{max-width:760px;margin:0 auto;}
.prose h2{font-size:26px;margin-bottom:18px;}
.prose h3{font-size:19px;margin:28px 0 12px;}
.prose p{font-size:16px;line-height:1.85;color:var(--ink-600);}

/* ---------- 标签云 ---------- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;}
.tag-cloud a{
 display:inline-block;
 padding:8px 15px;
 border-radius:var(--r-tag);
 background:var(--brand-050);
 color:var(--brand);
 font-size:14px;
 font-weight:600;
 transition:background .18s ease,color .18s ease,transform .18s ease;
}
.tag-cloud a:hover{background:var(--brand);color:#fff;transform:translateY(-1px);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.accordion-item{
 border:1px solid var(--line) !important;
 border-radius:14px !important;
 margin-bottom:12px;
 background:var(--surface);
 box-shadow:var(--shadow);
 overflow:hidden;
}
.accordion-button{
 padding:20px 22px;
 font-size:16px;
 font-weight:600;
 color:var(--ink);
 background:var(--surface);
 box-shadow:none !important;
 border-radius:14px !important;
}
.accordion-button:not(.collapsed){color:var(--brand);background:var(--brand-050);}
.accordion-button::after{transition:transform .2s ease;background-size:1rem;}
.accordion-button:not(.collapsed)::after{transform:rotate(180deg);}
.accordion-body{padding:6px 22px 22px;font-size:15px;line-height:1.8;color:var(--ink-600);}

/* ---------- 转化引导条 ---------- */
.cta-band{
 background:var(--brand-050);
 border:1px solid #D7E3FB;
 border-radius:var(--r-lg);
 padding:40px 44px;
 display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
}
.cta-band h2{font-size:24px;margin-bottom:8px;}
.cta-band p{margin:0;font-size:15px;color:var(--ink-600);max-width:620px;}

/* ---------- 页脚 ---------- */
.site-footer{background:#F1F5FB;border-top:1px solid var(--line);margin-top:88px;padding:64px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-word{font-size:17px;}
.footer-note{font-size:14px;line-height:1.8;color:var(--ink-600);margin-bottom:12px;}
.footer-title{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:14px;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:var(--ink-600);}
.footer-links a:hover{color:var(--brand);}
.footer-bottom{
 margin-top:44px;padding-top:20px;
 border-top:1px solid var(--line);
 display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
 font-size:13px;color:var(--ink-600);
}

/* ---------- 响应式 ---------- */
@media (max-width:1399.98px){
 .grid-cards{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:1199.98px){
 .grid-cards{grid-template-columns:repeat(2,minmax(0,1fr));}
 .cat-head-grid{grid-template-columns:minmax(0,1fr) 280px;gap:28px;}
 .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:991.98px){
 .nav-list{display:none;}
 .nav-burger{display:inline-flex;}
 .section{padding:64px 0;}
 h1,.cat-title{font-size:32px;}
 h2{font-size:24px;}
 .cta-band{padding:32px;}
}
@media (max-width:767.98px){
 .container{padding:0 18px;}
 .site-header{padding:14px 12px 4px;}
 .nav-shell{height:64px;padding:0 14px;gap:12px;}
 .brand-sub{display:none;}
 .cat-head{padding:28px 0 32px;}
 h1,.cat-title{font-size:30px;}
 h2{font-size:22px;}
 .grid-cards{grid-template-columns:1fr;}
 .grid-cards.is-list .media-card{flex-direction:column;}
 .grid-cards.is-list .media-thumb{width:100%;flex:none;}
 .view-toggle{margin-left:0;}
 .filter-sort{flex:1 1 100%;}
 .cta-band{flex-direction:column;align-items:flex-start;}
 .footer-grid{grid-template-columns:1fr;}
 .site-footer{margin-top:64px;padding-top:48px;}
}
@media (max-width:575.98px){
 .cat-head-grid{grid-template-columns:1fr;}
 .pager a,.pager span{min-width:38px;height:38px;}
 .btn-brand,.btn-ghost,.btn-line{width:100%;justify-content:center;}
 .nav-cta .btn-brand{width:auto;}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}