/* roulang page: index */
:root{
  --brand:#F2542D;
  --brand-dark:#D8401C;
  --ink:#12312E;
  --ink-soft:#3C5A56;
  --paper:#FBFAF7;
  --paper-alt:#F1EEE7;
  --line:rgba(18,49,46,.12);
  --line-strong:rgba(18,49,46,.26);
  --yellow:#FFC53D;
  --muted:#6E807D;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(18,49,46,.06);
  --sh-2:0 6px 20px rgba(18,49,46,.08);
  --sh-3:0 18px 40px rgba(18,49,46,.12);
  --sp-1:4px;--sp-2:8px;--sp-3:16px;--sp-4:24px;--sp-5:40px;--sp-6:64px;--sp-7:96px;
  --font-base:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-base);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4{font-weight:800;line-height:1.35;letter-spacing:-.01em;margin:0;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--yellow);outline-offset:2px;}
::selection{background:var(--yellow);color:var(--ink);}

@media (min-width:1200px){.container{max-width:1200px;}}
@media (min-width:1500px){.container{max-width:1320px;}}

.section{padding:var(--sp-7) 0;}
.section-tight{padding:var(--sp-6) 0;}
.section-alt{background:var(--paper-alt);}
.section-ink{background:var(--ink);color:#EFEAE1;}
.section-ink h2,.section-ink h3{color:#fff;}
.grid-lines{
  background-image:linear-gradient(rgba(18,49,46,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(18,49,46,.05) 1px,transparent 1px);
  background-size:34px 34px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--brand);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:3px;background:var(--brand);display:inline-block;border-radius:2px;}
.section-head{max-width:760px;margin-bottom:var(--sp-5);}
.section-head h2{font-size:32px;margin-top:12px;}
.section-head p{margin-top:16px;color:var(--muted);}
.text-muted-ink{color:var(--muted);}

/* ---------- 按钮 ---------- */
.btn-main,.btn-ghost,.btn-ink,.btn-pill-outline{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;border-radius:var(--r-pill);
  padding:13px 26px;border:1.5px solid transparent;
  cursor:pointer;transition:all .18s ease-out;line-height:1.2;
}
.btn-main{background:var(--brand);color:#fff;box-shadow:var(--sh-1);}
.btn-main:hover{background:var(--brand-dark);color:#fff;box-shadow:var(--sh-2);}
.btn-main:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-ink{background:var(--ink);color:#fff;}
.btn-ink:hover{background:#0B221F;color:#fff;box-shadow:var(--sh-2);}
.btn-pill-outline{background:transparent;border-color:rgba(255,255,255,.4);color:#fff;}
.btn-pill-outline:hover{background:#fff;color:var(--ink);border-color:#fff;}
.btn-sm-pill{padding:10px 20px;font-size:14px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--ink);
  border-bottom:1.5px solid transparent;padding-bottom:2px;
}
.link-arrow:hover{color:var(--brand);border-bottom-color:var(--brand);}
.link-arrow::after{content:"→";transition:transform .18s ease;}
.link-arrow:hover::after{transform:translateX(3px);}

.badge-soft{
  display:inline-block;background:var(--yellow);color:var(--ink);
  font-size:12px;font-weight:700;letter-spacing:.04em;
  padding:4px 12px;border-radius:var(--r-pill);
}
.badge-line{
  display:inline-block;font-size:12px;font-weight:600;color:var(--ink-soft);
  border:1px solid var(--line-strong);border-radius:var(--r-pill);padding:3px 11px;
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,250,247,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-2);}
.site-nav{padding:0;min-height:72px;}
.site-nav .container{display:flex;align-items:center;gap:16px;min-height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;padding:0;margin:0;}
.brand-mark{
  width:26px;height:26px;border-radius:8px;border:1.8px solid var(--brand);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 26px;
  background:#fff;
}
.brand-mark svg{width:14px;height:14px;}
.brand-name{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.01em;}
.brand:hover .brand-name{color:var(--brand);}
.channel-nav{gap:6px;margin-left:16px;}
.channel-nav .nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-soft);
  padding:8px 12px;border-radius:8px;
}
.channel-nav .nav-link:hover{color:var(--brand);}
.channel-nav .nav-link.active{color:var(--ink);font-weight:700;}
.channel-nav .nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-2px;height:3px;
  background:var(--brand);border-radius:2px;
}
.nav-side{display:flex;align-items:center;gap:14px;margin-left:auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;width:220px;
  background:#fff;border:1.5px solid var(--line);border-radius:var(--r-pill);
  padding:8px 16px;transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(242,84,45,.14);}
.nav-search svg{width:15px;height:15px;flex:0 0 15px;stroke:var(--muted);}
.nav-search input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--ink);}
.nav-search input::placeholder{color:#9AA9A6;}
.nav-login{font-size:15px;font-weight:600;color:var(--ink-soft);}
.nav-login:hover{color:var(--brand);}
.navbar-toggler{
  border:1.5px solid var(--line-strong);border-radius:10px;padding:8px 10px;margin-left:auto;
}
.navbar-toggler:focus{box-shadow:none;outline:2px solid var(--yellow);}
.toggler-bar{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;}
.toggler-bar+.toggler-bar{margin-top:4px;}
@media (max-width:991.98px){
  .navbar-collapse{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:16px;margin-top:12px;box-shadow:var(--sh-2);
  }
  .channel-nav{margin-left:0;gap:2px;}
  .channel-nav .nav-link{padding:10px 12px;}
  .channel-nav .nav-link.active::after{left:12px;right:auto;width:22px;}
  .nav-side{
    flex-direction:column;align-items:stretch;gap:12px;margin:16px 0 0;
    padding-top:16px;border-top:1px solid var(--line);
  }
  .nav-search{width:100%;}
  .nav-side .btn-main{width:100%;}
  .nav-login{text-align:center;}
}

/* ---------- Hero ---------- */
.hero{padding:var(--sp-6) 0 var(--sp-7);position:relative;overflow:hidden;}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:var(--sp-6);align-items:center;}
.hero h1{font-size:44px;line-height:1.28;margin-top:18px;}
.hero-sub{margin-top:20px;font-size:17px;color:var(--ink-soft);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-metrics{display:flex;flex-wrap:wrap;gap:32px;margin-top:40px;padding-top:26px;border-top:1px solid var(--line);}
.hero-metric .num{font-family:var(--font-num);font-size:28px;font-weight:700;color:var(--brand);line-height:1.1;}
.hero-metric .lbl{font-size:13px;color:var(--muted);margin-top:4px;}
.hero-figure{position:relative;}
.hero-figure img{border-radius:var(--r-img);box-shadow:var(--sh-2);width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
.hero-badge{
  position:absolute;top:-14px;left:-14px;background:var(--yellow);color:var(--ink);
  font-size:12px;font-weight:700;padding:7px 16px;border-radius:var(--r-pill);box-shadow:var(--sh-1);
}
@media (max-width:991.98px){
  .hero-inner{grid-template-columns:1fr;gap:var(--sp-5);}
  .hero h1{font-size:34px;}
  .hero-figure img{aspect-ratio:16/10;}
  .hero-badge{left:12px;top:12px;}
}
@media (max-width:575.98px){
  .hero{padding:var(--sp-5) 0 var(--sp-6);}
  .hero h1{font-size:27px;}
  .hero-metrics{gap:20px;}
  .hero-metric{min-width:88px;}
}

/* ---------- 指标看板 ---------- */
.metric-board{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;}
.metric-cell{padding:28px 24px;border-right:1px solid var(--line);}
.metric-cell:last-child{border-right:0;}
.metric-cell .val{font-family:var(--font-num);font-size:36px;font-weight:700;line-height:1;color:var(--ink);}
.metric-cell .val span{font-size:15px;font-weight:600;color:var(--brand);margin-left:4px;font-family:var(--font-base);}
.metric-cell .name{margin-top:12px;font-size:15px;font-weight:600;}
.metric-cell .desc{margin-top:6px;font-size:13px;color:var(--muted);}
@media (max-width:991.98px){
  .metric-board{grid-template-columns:repeat(2,1fr);}
  .metric-cell:nth-child(2){border-right:0;}
  .metric-cell:nth-child(1),.metric-cell:nth-child(2){border-bottom:1px solid var(--line);}
}
@media (max-width:575.98px){
  .metric-board{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;}
  .metric-cell{flex:0 0 200px;scroll-snap-align:start;border-right:1px solid var(--line);border-bottom:0 !important;}
}

/* ---------- 服务矩阵 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-4);}
.svc-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px 26px 26px;box-shadow:var(--sh-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out;
  display:flex;flex-direction:column;
}
.svc-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand);
  border-radius:var(--r-card) var(--r-card) 0 0;transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;
}
.svc-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.svc-card:hover::before{transform:scaleX(1);}
.svc-icon{
  width:46px;height:46px;border-radius:12px;background:var(--paper-alt);
  display:inline-flex;align-items:center;justify-content:center;margin-bottom:20px;
}
.svc-icon svg{width:22px;height:22px;stroke:var(--brand);fill:none;stroke-width:1.7;}
.svc-card h3{font-size:19px;}
.svc-card p{margin-top:12px;color:var(--muted);font-size:15px;}
.svc-card .svc-foot{margin-top:auto;padding-top:20px;}
@media (max-width:991.98px){.card-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:767.98px){.card-grid{grid-template-columns:1fr;}}

/* ---------- 流程区 ---------- */
.flow-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:var(--sp-6);align-items:center;}
.flow-wrap img{border-radius:var(--r-img);box-shadow:var(--sh-2);width:100%;aspect-ratio:4/3;object-fit:cover;}
.step-list{display:flex;flex-direction:column;gap:var(--sp-4);}
.step-item{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px 24px;box-shadow:var(--sh-1);}
.step-num{
  flex:0 0 40px;height:40px;border-radius:10px;background:var(--ink);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:15px;font-weight:700;
}
.step-item h3{font-size:17px;}
.step-item p{margin-top:8px;font-size:14.5px;color:var(--muted);}
@media (max-width:991.98px){
  .flow-wrap{grid-template-columns:1fr;gap:var(--sp-5);}
}

/* ---------- 内容列表 ---------- */
.list-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:var(--sp-5);}
.list-head h2{font-size:30px;margin-top:12px;}
.post-card{
  display:flex;gap:20px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px;box-shadow:var(--sh-1);height:100%;
  transition:transform .18s ease-out,box-shadow .18s ease-out;
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.post-card .thumb{
  flex:0 0 160px;width:160px;height:100px;border-radius:var(--r-img);overflow:hidden;background:var(--paper-alt);
}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;}
.post-card .body{flex:1;min-width:0;display:flex;flex-direction:column;}
.post-card h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-card p{
  margin-top:10px;font-size:14px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:14px;font-size:12.5px;color:var(--muted);}
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  text-align:center;background:#fff;border:1px dashed var(--line-strong);border-radius:var(--r-card);padding:40px 24px;
}
.empty-state p{color:var(--muted);}
@media (max-width:575.98px){
  .post-card{flex-direction:column;}
  .post-card .thumb{flex:none;width:100%;height:170px;}
}

/* ---------- 对比 ---------- */
.compare{
  display:grid;grid-template-columns:1fr auto 1fr;gap:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
}
.compare-col{padding:34px 30px;}
.compare-col h3{font-size:18px;margin-bottom:20px;}
.compare-col.left h3{color:var(--muted);}
.compare-col.right{background:var(--paper-alt);}
.compare-col.right h3{color:var(--ink);}
.compare li{display:flex;gap:12px;align-items:flex-start;padding:11px 0;font-size:15px;border-bottom:1px dashed var(--line);}
.compare li:last-child{border-bottom:0;}
.compare .mark{flex:0 0 22px;height:22px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;margin-top:3px;}
.compare .mark.no{background:#EFEAE1;color:#8A9794;}
.compare .mark.yes{background:var(--brand);color:#fff;}
.compare-sep{display:flex;align-items:center;justify-content:center;width:1px;background:var(--line);position:relative;}
.compare-vs{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:46px;height:46px;border-radius:50%;background:var(--ink);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;letter-spacing:.06em;
  border:4px solid #fff;
}
@media (max-width:767.98px){
  .compare{grid-template-columns:1fr;}
  .compare-sep{width:auto;height:1px;}
  .compare-vs{width:40px;height:40px;}
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-accordion .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;}
.faq-accordion .accordion-button{
  background:transparent;color:var(--ink);font-size:17px;font-weight:600;line-height:1.6;
  padding:22px 56px 22px 18px;border-radius:0;box-shadow:none;
}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--brand);box-shadow:inset 3px 0 0 var(--brand);background:transparent;
}
.faq-accordion .accordion-button::after{
  content:"+";background-image:none !important;
  width:26px;height:26px;border-radius:8px;background:var(--paper-alt);color:var(--ink);
  display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;line-height:1;
  position:absolute;right:14px;
}
.faq-accordion .accordion-button:not(.collapsed)::after{content:"−";background:var(--brand);color:#fff;}
.faq-accordion .accordion-body{padding:0 56px 26px 18px;color:var(--ink-soft);font-size:15px;}

/* ---------- 表单 ---------- */
.form-panel{
  display:grid;grid-template-columns:.85fr 1.15fr;gap:var(--sp-6);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:var(--sp-5);box-shadow:var(--sh-1);
}
.form-panel h2{font-size:28px;margin-top:14px;}
.form-panel .lead{margin-top:16px;color:var(--muted);font-size:15px;}
.form-panel .tips{margin-top:24px;display:flex;flex-direction:column;gap:12px;}
.form-panel .tips li{display:flex;gap:10px;font-size:14px;color:var(--ink-soft);}
.form-panel .tips li::before{content:"";flex:0 0 6px;width:6px;height:6px;background:var(--brand);border-radius:2px;margin-top:9px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.form-field{display:flex;flex-direction:column;gap:8px;}
.form-field.full{grid-column:1/-1;}
.form-field label{font-size:13.5px;font-weight:600;color:var(--ink-soft);}
.form-control,.form-select{
  border:1.5px solid var(--line-strong);border-radius:var(--r-btn);padding:12px 14px;
  background:#fff;color:var(--ink);transition:border-color .18s ease,box-shadow .18s ease;
}
.form-control::placeholder{color:#A3AFAC;}
.form-control:focus,.form-select:focus{
  border-color:var(--brand);box-shadow:0 0 0 3px rgba(242,84,45,.14);outline:0;
}
textarea.form-control{min-height:110px;resize:vertical;}
.form-note{font-size:13px;color:var(--muted);margin-top:14px;}
.form-done{
  margin-top:16px;background:var(--paper-alt);border-left:3px solid var(--brand);
  padding:12px 16px;border-radius:8px;font-size:14px;color:var(--ink);
}
@media (max-width:991.98px){
  .form-panel{grid-template-columns:1fr;gap:var(--sp-5);padding:var(--sp-4);}
}
@media (max-width:575.98px){
  .form-grid{grid-template-columns:1fr;}
  .form-panel .btn-main{width:100%;}
}

/* ---------- CTA 带 ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  background:var(--brand);color:#fff;border-radius:var(--r-card);padding:40px 40px;
}
.cta-band h2{font-size:26px;color:#fff;}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.9);max-width:640px;font-size:15px;}
.cta-band .btn-white{
  background:#fff;color:var(--ink);border-radius:var(--r-pill);padding:13px 28px;font-weight:700;
  border:1.5px solid #fff;transition:all .18s ease-out;
}
.cta-band .btn-white:hover{background:var(--ink);border-color:var(--ink);color:#fff;}
@media (max-width:767.98px){
  .cta-band{padding:30px 24px;}
  .cta-band .btn-white{width:100%;}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#D9D3C8;padding:var(--sp-6) 0 0;margin-top:0;}
.site-footer h4{font-size:14px;letter-spacing:.1em;color:#fff;margin-bottom:18px;font-weight:700;}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr 1fr 1fr;gap:var(--sp-5);padding-bottom:var(--sp-6);}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{border-color:var(--yellow);background:transparent;}
.footer-brand .brand-name{color:#fff;font-size:16px;}
.footer-brand .brand-mark svg{stroke:var(--yellow);}
.site-footer p{font-size:14px;color:rgba(233,228,218,.72);}
.site-footer ul{display:flex;flex-direction:column;gap:11px;}
.site-footer ul a{color:rgba(233,228,218,.78);font-size:14.5px;}
.site-footer ul a:hover{color:var(--yellow);}
.footer-bottom{
  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:rgba(233,228,218,.6);
}
@media (max-width:991.98px){.footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-5) var(--sp-4);}}
@media (max-width:575.98px){.footer-grid{grid-template-columns:1fr;}}

@media (max-width:991.98px){
  .section{padding:var(--sp-6) 0;}
  .section-head h2,.list-head h2{font-size:26px;}
}
@media (max-width:575.98px){
  body{font-size:15.5px;}
  .section{padding:var(--sp-5) 0 var(--sp-6);}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%;}
  .cta-band h2{font-size:21px;}
}

/* roulang page: category1 */
:root{
  --c-primary:#F2542D;
  --c-primary-dark:#D8401C;
  --c-ink:#12312E;
  --c-ink-soft:#1D4641;
  --c-accent:#FFC53D;
  --c-bg:#FBFAF7;
  --c-alt:#F1EEE7;
  --c-card:#FFFFFF;
  --c-text:#1B2A28;
  --c-muted:#5E6E6B;
  --c-line:rgba(18,49,46,.12);
  --c-line-soft:rgba(18,49,46,.07);
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(18,49,46,.06);
  --sh-2:0 6px 20px rgba(18,49,46,.08);
  --sh-3:0 18px 40px rgba(18,49,46,.12);
  --sp-1:4px; --sp-2:8px; --sp-3:16px; --sp-4:24px;
  --sp-5:40px; --sp-6:64px; --sp-7:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
p{margin:0 0 1.2em;}
h1,h2,h3,h4{margin:0 0 12px;font-weight:800;color:var(--c-ink);letter-spacing:.2px;}
a{color:var(--c-ink);text-decoration:none;transition:color .18s ease-out;}
a:hover{color:var(--c-primary);}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--c-accent);outline-offset:2px;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
ul{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1500px){.container{max-width:1320px;}}
.num{font-variant-numeric:tabular-nums;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,250,247,.96);
  border-bottom:1px solid var(--c-line-soft);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-2);}
.site-nav{padding:0;min-height:72px;}
.site-nav .container{
  display:flex;align-items:center;gap:var(--sp-4);
  min-height:72px;flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:10px;padding:0;margin-right:auto;}
.brand-mark{
  width:24px;height:24px;flex:0 0 24px;display:inline-flex;
  align-items:center;justify-content:center;
  border:1.5px solid var(--c-primary);border-radius:6px;
}
.brand-mark svg{width:16px;height:16px;}
.brand-name{font-size:18px;font-weight:800;color:var(--c-ink);white-space:nowrap;}
.navbar-toggler{
  border:1.5px solid var(--c-line);border-radius:10px;
  padding:8px 10px;background:transparent;
}
.navbar-toggler:focus{box-shadow:none;}
.toggler-bar{display:block;width:20px;height:2px;background:var(--c-ink);margin:4px 0;border-radius:2px;}
.channel-nav{align-items:center;gap:var(--sp-1);}
.channel-nav .nav-link{
  position:relative;color:var(--c-ink);font-weight:500;font-size:15px;
  padding:8px 12px;border-radius:8px;
}
.channel-nav .nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:3px;
  background:transparent;border-radius:3px;transition:background .18s ease-out;
}
.channel-nav .nav-link:hover{color:var(--c-primary);transform:translateY(-1px);}
.channel-nav .nav-link.active{color:var(--c-primary);}
.channel-nav .nav-link.active::after{background:var(--c-primary);}
.nav-side{display:flex;align-items:center;gap:var(--sp-3);margin-left:auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  width:220px;padding:7px 14px;
  background:#fff;border:1.5px solid var(--c-line);border-radius:var(--r-pill);
}
.nav-search svg{width:15px;height:15px;stroke:var(--c-muted);flex:0 0 15px;}
.nav-search input{
  border:0;background:transparent;width:100%;font-size:14px;color:var(--c-text);
  outline:none;font-family:inherit;
}
.nav-search input::placeholder{color:#9AA7A4;}
.nav-login{font-size:15px;font-weight:500;color:var(--c-ink);}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--c-primary);color:#fff;font-weight:600;
  padding:11px 22px;border:0;border-radius:var(--r-btn);
  box-shadow:var(--sh-1);transition:all .18s ease-out;cursor:pointer;
  font-size:15px;font-family:inherit;
}
.btn-main:hover{background:var(--c-primary-dark);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px);}
.btn-main:active{transform:translateY(1px);}
.btn-sm-pill{padding:9px 20px;border-radius:var(--r-pill);font-size:14px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;color:var(--c-ink);font-weight:600;
  padding:10px 22px;border:1.5px solid var(--c-ink);border-radius:var(--r-btn);
  transition:all .18s ease-out;font-size:15px;cursor:pointer;font-family:inherit;
}
.btn-ghost:hover{background:var(--c-ink);color:#fff;}
.btn-ghost-light{border-color:rgba(255,255,255,.55);color:#fff;}
.btn-ghost-light:hover{background:#fff;color:var(--c-ink);}
.btn-pill{border-radius:var(--r-pill);}

/* ============ 通用板块 ============ */
.section{padding:var(--sp-6) 0;}
.section-alt{background:var(--c-alt);}
.section-ink{background:var(--c-ink);color:#E9E6DE;}
.section-ink h2,.section-ink h3{color:#fff;}
.section-head{max-width:760px;margin-bottom:var(--sp-5);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1px;
  color:var(--c-primary);margin-bottom:12px;text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-primary);border-radius:2px;}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.35;margin-bottom:12px;}
.section-head p{color:var(--c-muted);font-size:16px;margin:0;}
.section-ink .section-head p{color:rgba(233,230,222,.78);}
.badge-tag{
  display:inline-flex;align-items:center;
  background:var(--c-accent);color:var(--c-ink);
  font-size:12px;font-weight:700;padding:4px 12px;border-radius:var(--r-pill);
  letter-spacing:.3px;
}
.badge-soft{
  display:inline-flex;align-items:center;
  background:rgba(242,84,45,.1);color:var(--c-primary-dark);
  font-size:12px;font-weight:700;padding:4px 12px;border-radius:var(--r-pill);
}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-weight:700;font-size:14px;color:var(--c-primary-dark);
}
.link-arrow svg{width:14px;height:14px;transition:transform .18s ease-out;}
.link-arrow:hover svg{transform:translateX(3px);}

/* ============ 分类横幅 ============ */
.cat-hero{
  position:relative;min-height:280px;
  display:flex;align-items:center;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-radius:0 0 var(--r-card) var(--r-card);
  overflow:hidden;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(18,49,46,.94) 0%,rgba(18,49,46,.76) 55%,rgba(18,49,46,.52) 100%);
}
.cat-hero .container{position:relative;z-index:2;padding-top:var(--sp-5);padding-bottom:var(--sp-5);}
.breadcrumb-line{
  font-size:13px;color:rgba(255,255,255,.72);margin-bottom:16px;
}
.breadcrumb-line a{color:rgba(255,255,255,.72);}
.breadcrumb-line a:hover{color:var(--c-accent);}
.breadcrumb-line span.sep{margin:0 8px;opacity:.5;}
.cat-hero h1{
  color:#fff;font-size:clamp(26px,4vw,42px);line-height:1.3;
  max-width:820px;margin-bottom:16px;
}
.cat-hero p{
  color:rgba(255,255,255,.84);max-width:660px;font-size:16px;margin-bottom:var(--sp-4);
}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px;}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:var(--sp-5);
  margin-top:var(--sp-5);padding-top:var(--sp-4);
  border-top:1px solid rgba(255,255,255,.16);
}
.hero-metrics div{min-width:110px;}
.hero-metrics .v{font-size:26px;font-weight:800;color:var(--c-accent);line-height:1.2;}
.hero-metrics .k{font-size:13px;color:rgba(255,255,255,.72);}

/* ============ 卡片网格 ============ */
.card-grid{
  display:grid;gap:var(--sp-4);
  grid-template-columns:repeat(3,1fr);
}
.topic-card{
  background:var(--c-card);border:1px solid var(--c-line-soft);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  overflow:hidden;display:flex;flex-direction:column;
  position:relative;transition:transform .18s ease-out,box-shadow .18s ease-out;
}
.topic-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;
}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.topic-card:hover::before{transform:scaleX(1);}
.topic-card .cover{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;}
.topic-card .body{padding:20px;display:flex;flex-direction:column;flex:1;}
.topic-card h3{font-size:18px;line-height:1.5;margin:12px 0 8px;}
.topic-card p{
  color:var(--c-muted);font-size:14px;line-height:1.8;margin:0 0 18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.topic-card .foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;border-top:1px solid var(--c-line-soft);
}
.mini-tag{
  font-size:12px;color:var(--c-muted);background:var(--c-alt);
  padding:3px 10px;border-radius:var(--r-pill);
}

/* ============ 流程 ============ */
.step-grid{display:grid;gap:var(--sp-4);grid-template-columns:repeat(4,1fr);}
.step-card{
  background:#fff;border:1px solid var(--c-line-soft);border-radius:var(--r-card);
  padding:24px 20px;box-shadow:var(--sh-1);
}
.step-num{
  width:40px;height:40px;border-radius:10px;
  background:var(--c-ink);color:#fff;font-weight:800;font-size:17px;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.step-card h3{font-size:17px;margin-bottom:8px;}
.step-card p{color:var(--c-muted);font-size:14.5px;margin:0;}

/* ============ 对比双栏 ============ */
.compare{
  display:grid;grid-template-columns:1fr auto 1fr;gap:var(--sp-4);
  align-items:stretch;
}
.compare-col{
  background:#fff;border:1px solid var(--c-line-soft);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-1);
}
.compare-col h3{font-size:18px;margin-bottom:16px;}
.compare-col.right{border-color:rgba(242,84,45,.35);box-shadow:var(--sh-2);}
.compare-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:15px;color:var(--c-muted);padding:9px 0;
  border-bottom:1px dashed var(--c-line-soft);
}
.compare-list li:last-child{border-bottom:0;}
.compare-list .mark{
  flex:0 0 20px;width:20px;height:20px;border-radius:6px;margin-top:5px;
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;
}
.mark-no{background:rgba(18,49,46,.09);color:var(--c-ink);}
.mark-yes{background:rgba(242,84,45,.12);color:var(--c-primary-dark);}
.vs-circle{
  align-self:center;width:48px;height:48px;border-radius:50%;
  background:var(--c-ink);color:#fff;font-weight:800;font-size:13px;
  display:flex;align-items:center;justify-content:center;letter-spacing:.5px;
}

/* ============ 场景图文 ============ */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:var(--sp-6);align-items:center;}
.split img{box-shadow:var(--sh-2);}
.scene-list li{
  display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--c-line-soft);
}
.scene-list li:last-child{border-bottom:0;}
.scene-list .idx{
  flex:0 0 34px;height:34px;border-radius:9px;background:var(--c-alt);
  color:var(--c-primary-dark);font-weight:800;font-size:14px;
  display:flex;align-items:center;justify-content:center;
}
.scene-list h3{font-size:16px;margin-bottom:4px;}
.scene-list p{font-size:14.5px;color:var(--c-muted);margin:0;}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-wrap .accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--c-line);
}
.faq-wrap .accordion-button{
  background:transparent;box-shadow:none;color:var(--c-ink);
  font-size:17px;font-weight:600;padding:20px 44px 20px 16px;
  border-left:3px solid transparent;border-radius:0;
}
.faq-wrap .accordion-button:not(.collapsed){
  color:var(--c-primary-dark);border-left-color:var(--c-primary);
  background:rgba(242,84,45,.04);
}
.faq-wrap .accordion-button::after{
  background-size:14px;width:14px;height:14px;
  filter:invert(34%) sepia(56%) saturate(2200%) hue-rotate(344deg) brightness(95%) contrast(92%);
}
.faq-wrap .accordion-body{
  padding:0 44px 22px 19px;color:var(--c-muted);font-size:15px;line-height:1.85;
}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--c-ink);border-radius:var(--r-card);
  padding:var(--sp-5) var(--sp-5);color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-5);
  box-shadow:var(--sh-3);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-40px;top:-40px;width:200px;height:200px;
  border:1px solid rgba(255,197,61,.28);border-radius:50%;
}
.cta-band h2{color:#fff;font-size:clamp(20px,2.4vw,26px);margin-bottom:8px;}
.cta-band p{color:rgba(255,255,255,.78);margin:0;font-size:15px;max-width:620px;}
.cta-band .acts{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:2;}
.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-accent);color:var(--c-ink);font-weight:700;
  padding:12px 26px;border-radius:var(--r-pill);border:0;font-size:15px;
  transition:all .18s ease-out;cursor:pointer;font-family:inherit;
}
.btn-accent:hover{background:#FFD66B;color:var(--c-ink);transform:translateY(-1px);box-shadow:var(--sh-2);}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-ink);color:#E9E6DE;padding:var(--sp-6) 0 24px;margin-top:var(--sp-6);}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:var(--sp-5);
  padding-bottom:var(--sp-5);border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{border-color:var(--c-accent);}
.footer-brand .brand-mark svg{stroke:var(--c-accent);}
.footer-brand .brand-name{color:#fff;font-size:17px;font-weight:800;}
.site-footer p{color:rgba(233,230,222,.72);font-size:14.5px;max-width:340px;}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.4px;}
.site-footer li{margin-bottom:10px;}
.site-footer a{color:rgba(233,230,222,.78);font-size:14.5px;}
.site-footer a:hover{color:var(--c-accent);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  padding-top:22px;font-size:13.5px;color:rgba(233,230,222,.6);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .step-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991px){
  .site-nav .container{min-height:auto;padding-top:12px;padding-bottom:12px;}
  .nav-side{width:100%;flex-direction:column;align-items:stretch;gap:12px;margin-top:14px;}
  .nav-search{width:100%;}
  .nav-side .btn-main,.nav-side .btn-sm-pill{width:100%;}
  .nav-login{display:inline-flex;justify-content:center;padding:8px 0;border-top:1px solid var(--c-line-soft);border-bottom:1px solid var(--c-line-soft);}
  .channel-nav{width:100%;align-items:stretch;margin-top:10px;}
  .channel-nav .nav-link{padding:11px 10px;border-bottom:1px solid var(--c-line-soft);border-radius:0;}
  .channel-nav .nav-link::after{display:none;}
  .split{grid-template-columns:1fr;gap:var(--sp-5);}
  .cta-band{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-4);}
}
@media (max-width:767px){
  .card-grid{grid-template-columns:1fr;}
  .compare{grid-template-columns:1fr;}
  .vs-circle{margin:0 auto;}
  .cat-hero{min-height:200px;}
  .hero-metrics{gap:var(--sp-4);overflow-x:auto;flex-wrap:nowrap;padding-bottom:6px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .section{padding:var(--sp-5) 0;}
  .step-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .brand-name{font-size:16px;}
  .cat-hero h1{font-size:24px;}
}

/* roulang page: article */
:root{
  --c-primary:#F2542D;
  --c-primary-dark:#D8401C;
  --c-primary-soft:rgba(242,84,45,.10);
  --c-ink:#12312E;
  --c-ink-soft:rgba(18,49,46,.08);
  --c-accent:#FFC53D;
  --c-bg:#FBFAF7;
  --c-alt:#F1EEE7;
  --c-card:#FFFFFF;
  --c-text:#22322F;
  --c-muted:#6B7B78;
  --c-line:rgba(18,49,46,.10);
  --c-line-strong:rgba(18,49,46,.18);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,49,46,.06);
  --sh-2:0 6px 20px rgba(18,49,46,.08);
  --sh-3:0 18px 40px rgba(18,49,46,.12);
  --sp-1:4px; --sp-2:8px; --sp-3:16px; --sp-4:24px;
  --sp-5:40px; --sp-6:64px; --sp-7:96px;
  --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background-color:var(--c-bg);
  background-image:linear-gradient(rgba(18,49,46,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(18,49,46,.035) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--c-ink);text-decoration:none;transition:color .18s ease-out,background-color .18s ease-out,border-color .18s ease-out}
a:hover{color:var(--c-primary)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.35;color:var(--c-ink)}
p{margin:0 0 1.2em}
button,input,select,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
.container{max-width:1200px;padding-left:20px;padding-right:20px}
@media (min-width:1500px){.container{max-width:1320px}}

/* ============ 通用按钮 / 徽章 ============ */
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--c-primary);color:#fff;font-weight:600;font-size:15px;
  padding:12px 26px;border-radius:var(--r-pill);border:1.5px solid var(--c-primary);
  box-shadow:var(--sh-1);cursor:pointer;
  transition:background-color .18s ease-out,box-shadow .18s ease-out,transform .12s ease-out;
}
.btn-main:hover,.btn-main:focus{background:var(--c-primary-dark);border-color:var(--c-primary-dark);color:#fff;box-shadow:var(--sh-2)}
.btn-main:active{transform:translateY(1px)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--c-ink);font-weight:600;font-size:15px;
  padding:12px 26px;border-radius:var(--r-pill);border:1.5px solid var(--c-ink);cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,transform .12s ease-out;
}
.btn-ghost:hover,.btn-ghost:focus{background:var(--c-ink);color:#fff}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm-pill{padding:9px 20px;font-size:14px}
.btn-block-mobile{width:100%}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:14px;
  color:var(--c-primary);border-bottom:1px solid transparent;
}
.link-arrow:hover{border-bottom-color:var(--c-primary)}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--c-accent);color:var(--c-ink);
  font-size:12px;font-weight:700;letter-spacing:.02em;
  padding:4px 12px;border-radius:var(--r-pill);
}
.badge-outline{
  display:inline-flex;align-items:center;
  border:1px solid var(--c-line-strong);color:var(--c-muted);
  font-size:12px;font-weight:600;padding:3px 11px;border-radius:var(--r-pill);
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(251,250,247,.96);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease-out,background-color .2s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-2);background:rgba(251,250,247,.98)}
.site-nav{min-height:72px;padding:0}
.site-nav .container{display:flex;align-items:center;gap:24px;min-height:72px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:10px;padding:0;margin:0;flex:0 0 auto}
.brand-mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 auto;
  background:var(--c-primary-soft);border:1.5px solid var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:16px;height:16px}
.brand-name{font-size:18px;font-weight:800;color:var(--c-ink);letter-spacing:.01em}
.brand:hover .brand-name{color:var(--c-primary)}
.navbar-toggler{
  border:1.5px solid var(--c-line-strong);border-radius:10px;
  padding:8px 10px;display:inline-flex;flex-direction:column;gap:4px;
  background:transparent;cursor:pointer;
}
.navbar-toggler:focus{box-shadow:none;outline:2px solid var(--c-accent);outline-offset:2px}
.toggler-bar{display:block;width:20px;height:2px;background:var(--c-ink);border-radius:2px}
.channel-nav{display:flex;align-items:center;gap:4px;margin:0 0 0 8px;flex-wrap:wrap}
.channel-nav .nav-item{list-style:none}
.channel-nav .nav-link{
  position:relative;display:block;padding:24px 14px;font-size:15px;font-weight:500;color:var(--c-ink);
  background:transparent;border:0;
}
.channel-nav .nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:16px;height:3px;border-radius:3px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .18s ease-out;
}
.channel-nav .nav-link:hover{color:var(--c-primary)}
.channel-nav .nav-link:hover::after{transform:scaleX(1)}
.channel-nav .nav-link.active{color:var(--c-primary);font-weight:600}
.channel-nav .nav-link.active::after{transform:scaleX(1)}
.nav-side{display:flex;align-items:center;gap:14px;margin-left:auto}
.nav-search{
  display:flex;align-items:center;gap:8px;
  background:#fff;border:1.5px solid var(--c-line);border-radius:var(--r-pill);
  padding:7px 16px;width:220px;transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.nav-search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-soft)}
.nav-search svg{width:16px;height:16px;stroke:var(--c-muted);fill:none;flex:0 0 auto}
.nav-search input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--c-text)}
.nav-search input::placeholder{color:var(--c-muted)}
.nav-login{font-size:14px;font-weight:600;color:var(--c-ink)}
.nav-login:hover{color:var(--c-primary)}

/* ============ 文章头部 ============ */
.page-main{display:block}
.article-hero{
  position:relative;padding:var(--sp-5) 0 var(--sp-4);
  background-color:var(--c-alt);
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--c-line);
}
.article-hero::before{content:"";position:absolute;inset:0;background:rgba(251,250,247,.90)}
.article-hero .container{position:relative;z-index:1}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:var(--sp-3)}
.crumb a{color:var(--c-muted)}
.crumb a:hover{color:var(--c-primary)}
.crumb-sep{color:var(--c-line-strong)}
.crumb-now{color:var(--c-ink);font-weight:600;max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{font-size:34px;font-weight:800;line-height:1.4;max-width:900px;margin-bottom:var(--sp-3)}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13px;color:var(--c-muted);padding-bottom:var(--sp-3);border-bottom:1px solid var(--c-line)}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--c-line-strong)}

/* ============ 布局 ============ */
.layout-section{padding:var(--sp-6) 0 var(--sp-7)}
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:var(--sp-6);align-items:start}
.panel{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:var(--sp-5);
}
.article-body{max-width:760px;margin:0 auto;font-size:16px;line-height:1.85;color:var(--c-text)}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  position:relative;font-size:20px;font-weight:700;margin:2em 0 .8em;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:3px;background:var(--c-primary);
}
.article-body h3{font-size:18px;font-weight:700;margin:1.6em 0 .7em}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:4px}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.5em}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;background:var(--c-primary);border-radius:2px;
}
.article-body ol{counter-reset:item;padding-left:0}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:.5em;counter-increment:item}
.article-body ol li::before{
  content:counter(item);position:absolute;left:0;top:.28em;width:20px;height:20px;border-radius:6px;
  background:var(--c-primary-soft);color:var(--c-primary-dark);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;font-family:var(--font-num);
}
.article-body blockquote{
  margin:1.4em 0;padding:18px 22px;background:var(--c-alt);
  border-left:4px solid var(--c-primary);border-radius:0 var(--r-img) var(--r-img) 0;color:var(--c-ink);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);box-shadow:var(--sh-1);margin:1.2em auto}
.article-body figure{margin:1.4em 0}
.article-body figcaption{font-size:13px;color:var(--c-muted);text-align:center;margin-top:8px}
.article-body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 14px;text-align:left}
.article-body th{background:var(--c-alt);font-weight:700;color:var(--c-ink)}
.article-body a{color:var(--c-primary);border-bottom:1px solid rgba(242,84,45,.35)}
.article-body a:hover{border-bottom-color:var(--c-primary)}
.article-body strong{color:var(--c-ink);font-weight:700}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:2em 0}
.empty-state{text-align:center;padding:var(--sp-6) var(--sp-4)}
.empty-state h2{font-size:22px;margin-bottom:12px}
.empty-state p{color:var(--c-muted);margin-bottom:var(--sp-4)}

/* ============ 侧栏 ============ */
.side-col{display:flex;flex-direction:column;gap:var(--sp-4);position:sticky;top:96px}
.side-card{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:var(--sp-4)}
.side-title{display:flex;align-items:center;justify-content:space-between;font-size:16px;font-weight:700;margin-bottom:var(--sp-3)}
.side-title span.side-kicker{font-size:12px;font-weight:600;color:var(--c-muted)}
.mini-list li + li{border-top:1px solid var(--c-line)}
.mini-list a{display:block;padding:12px 0;font-size:14px;font-weight:600;color:var(--c-ink);line-height:1.6}
.mini-list a:hover{color:var(--c-primary)}
.mini-list .mini-time{display:block;font-size:12px;font-weight:500;color:var(--c-muted);margin-top:4px}
.mini-list li:last-child a{padding-bottom:4px}
.side-thumb{display:flex;gap:12px;padding:12px 0}
.side-thumb img{width:88px;height:62px;object-fit:cover;border-radius:var(--r-img);flex:0 0 auto}
.side-thumb .side-thumb-txt{min-width:0}
.side-thumb .side-thumb-txt strong{display:block;font-size:14px;font-weight:600;color:var(--c-ink);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-thumb .side-thumb-txt em{display:block;font-style:normal;font-size:12px;color:var(--c-muted);margin-top:6px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;font-size:13px;font-weight:600;color:var(--c-ink);
  background:var(--c-alt);border:1px solid var(--c-line);border-radius:var(--r-pill);padding:6px 14px;
}
.chip:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.side-cta{
  background:var(--c-ink);color:#fff;border-radius:var(--r-card);padding:var(--sp-4);
}
.side-cta h3{color:#fff;font-size:17px;margin-bottom:8px}
.side-cta p{color:rgba(255,255,255,.72);font-size:14px;margin-bottom:16px}
.side-cta .btn-main{width:100%}

/* ============ 上下篇 ============ */
.pager-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-4);margin-top:var(--sp-5)}
.pager-card{
  display:block;background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:var(--sp-4);box-shadow:var(--sh-1);transition:transform .18s ease-out,box-shadow .18s ease-out;
}
.pager-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);color:inherit}
.pager-card .pager-label{font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--c-primary);display:block;margin-bottom:8px}
.pager-card strong{display:block;font-size:16px;font-weight:700;color:var(--c-ink);line-height:1.55}
.pager-card p{font-size:13px;color:var(--c-muted);margin:8px 0 0}

/* ============ 相关推荐 ============ */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:var(--sp-4)}
.section-head h2{font-size:24px;font-weight:800}
.section-head p{color:var(--c-muted);font-size:14px;margin:6px 0 0}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-4)}
.post-card{
  display:flex;flex-direction:column;background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .18s ease-out,box-shadow .18s ease-out;
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.post-card .card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--c-alt)}
.post-card .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.post-card:hover .card-media img{transform:scale(1.04)}
.post-card .card-media .badge-soft{position:absolute;left:14px;top:14px}
.post-card .card-body{padding:var(--sp-4);display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.post-card h3{font-size:17px;font-weight:700;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card h3 a{color:var(--c-ink)}
.post-card h3 a:hover{color:var(--c-primary)}
.post-card .card-desc{font-size:14px;color:var(--c-muted);line-height:1.75;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card .card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-muted);padding-top:12px;border-top:1px solid var(--c-line)}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--c-ink);color:#fff;border-radius:var(--r-card);
  padding:var(--sp-6);display:flex;align-items:center;justify-content:space-between;gap:var(--sp-5);
  margin-top:var(--sp-7);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:rgba(255,197,61,.14);
}
.cta-band .cta-txt{position:relative;z-index:1;max-width:620px}
.cta-band h2{color:#fff;font-size:26px;font-weight:800;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.75);margin:0;font-size:15px}
.cta-band .cta-actions{position:relative;z-index:1;display:flex;gap:12px;flex-wrap:wrap}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.cta-band .btn-ghost:hover{background:#fff;color:var(--c-ink);border-color:#fff}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.78);padding:var(--sp-6) 0 var(--sp-4);margin-top:var(--sp-7)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:var(--sp-5)}
.site-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:var(--sp-3)}
.site-footer p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);margin:var(--sp-3) 0 0;max-width:340px}
.site-footer ul li{margin-bottom:10px}
.site-footer ul a{color:rgba(255,255,255,.78);font-size:14px}
.site-footer ul a:hover{color:var(--c-accent)}
.footer-brand{display:inline-flex;align-items:center;gap:10px}
.footer-brand .brand-mark{background:rgba(255,197,61,.14)}
.footer-brand .brand-name{color:#fff;font-size:17px;font-weight:800}
.footer-bottom{
  margin-top:var(--sp-5);padding-top:var(--sp-4);border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .article-wrap{grid-template-columns:minmax(0,1fr) 300px;gap:var(--sp-5)}
  .nav-search{width:180px}
}
@media (max-width:991.98px){
  .site-nav .container{gap:16px}
  .navbar-collapse{
    flex-basis:100%;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--sh-2);padding:var(--sp-3) var(--sp-3) var(--sp-4);margin-bottom:var(--sp-3);
  }
  .channel-nav{flex-direction:column;align-items:stretch;margin:0;gap:0}
  .channel-nav .nav-link{padding:12px 8px;border-bottom:1px solid var(--c-line)}
  .channel-nav .nav-link::after{display:none}
  .channel-nav .nav-link.active{color:var(--c-primary);border-bottom-color:var(--c-primary)}
  .nav-side{flex-direction:column;align-items:stretch;margin:var(--sp-3) 0 0;gap:12px}
  .nav-search{width:100%}
  .nav-login{text-align:center;padding:8px 0}
  .btn-sm-pill{width:100%;padding:12px 20px;font-size:15px}
  .article-wrap{grid-template-columns:minmax(0,1fr)}
  .side-col{position:static}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{flex-direction:column;align-items:flex-start;padding:var(--sp-5)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-4)}
}
@media (max-width:767.98px){
  .article-hero{padding:var(--sp-4) 0 var(--sp-3)}
  .article-title{font-size:26px}
  .crumb-now{max-width:220px}
  .layout-section{padding:var(--sp-5) 0 var(--sp-6)}
  .panel{padding:var(--sp-4)}
  .pager-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .cta-band h2{font-size:22px}
}
@media (max-width:575.98px){
  body{font-size:15.5px}
  .container{padding-left:16px;padding-right:16px}
  .brand-name{font-size:16px}
  .article-title{font-size:23px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-band .cta-actions{width:100%}
  .cta-band .cta-actions .btn-main,.cta-band .cta-actions .btn-ghost{width:100%}
}

/* roulang page: category2 */
:root{
  --ink:#12312E;
  --ink-soft:#1E4844;
  --brand:#F2542D;
  --brand-dark:#D8401C;
  --lemon:#FFC53D;
  --paper:#FBFAF7;
  --paper-alt:#F1EEE7;
  --white:#FFFFFF;
  --text:#1B2A28;
  --muted:#5C6A67;
  --line:rgba(18,49,46,.10);
  --line-strong:rgba(18,49,46,.18);
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,49,46,.06);
  --sh-2:0 6px 20px rgba(18,49,46,.08);
  --sh-3:0 18px 40px rgba(18,49,46,.12);
  --sp-1:4px;
  --sp-2:8px;
  --sp-3:16px;
  --sp-4:24px;
  --sp-5:40px;
  --sp-6:64px;
  --sp-7:96px;
  --ease:180ms ease-out;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;}

body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:.01em;
  overflow-x:hidden;
}

img{max-width:100%;height:auto;display:block;}
a{color:var(--ink);text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease);}
a:hover{color:var(--brand);}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink);font-weight:800;line-height:1.35;margin:0 0 var(--sp-3);letter-spacing:-.01em;}
h1{font-size:34px;}
h2{font-size:26px;}
h3{font-size:18px;font-weight:700;}
p{margin:0 0 1.2em;color:var(--text);}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--lemon);outline-offset:2px;}

.container,
.container-lg{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}

@media (min-width:1500px){
  .container,.container-lg{max-width:1320px;}
}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(251,250,247,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background-color var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-2);background:rgba(251,250,247,.98);}

.site-nav{padding:0;min-height:72px;}
.site-nav .container{
  display:flex;
  align-items:center;
  min-height:72px;
  flex-wrap:wrap;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-right:var(--sp-5);
  padding:0;
  flex:0 0 auto;
}
.brand-mark{
  width:24px;height:24px;
  display:inline-flex;align-items:center;justify-content:center;
  flex:0 0 24px;
}
.brand-mark svg{width:24px;height:24px;display:block;}
.brand-name{
  font-size:17px;
  font-weight:800;
  color:var(--ink);
  letter-spacing:.01em;
  white-space:nowrap;
}
.brand:hover .brand-name{color:var(--brand);}

.navbar-toggler{
  margin-left:auto;
  border:1.5px solid var(--line-strong);
  border-radius:var(--r-btn);
  padding:8px 10px;
  background:var(--white);
  box-shadow:none;
  display:none;
}
.navbar-toggler:focus{box-shadow:none;outline:2px solid var(--lemon);outline-offset:2px;}
.toggler-bar{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;}
.toggler-bar + .toggler-bar{margin-top:4px;}

.channel-nav{
  display:flex;
  align-items:center;
  flex-direction:row;
  margin-right:auto;
}
.channel-nav .nav-item{list-style:none;}
.channel-nav .nav-link{
  position:relative;
  display:inline-block;
  padding:10px 2px;
  margin:0 15px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  white-space:nowrap;
  background:none;
}
.channel-nav .nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:2px;
  height:3px;border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--ease);
}
.channel-nav .nav-link:hover{color:var(--brand);}
.channel-nav .nav-link:hover::after{transform:scaleX(1);}
.channel-nav .nav-link.active{color:var(--ink);font-weight:700;}
.channel-nav .nav-link.active::after{transform:scaleX(1);}

.nav-side{
  display:flex;
  align-items:center;
  gap:var(--sp-3);
  flex:0 0 auto;
}
.nav-search{
  position:relative;
  display:flex;
  align-items:center;
  width:220px;
}
.nav-search svg{
  position:absolute;
  left:14px;
  width:16px;height:16px;
  stroke:var(--muted);
  fill:none;
  pointer-events:none;
}
.nav-search input{
  width:100%;
  height:38px;
  padding:0 14px 0 38px;
  border:1.5px solid var(--line);
  border-radius:var(--r-pill);
  background:var(--white);
  font-size:13.5px;
  color:var(--text);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.nav-search input::placeholder{color:#9AA6A3;}
.nav-search input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(242,84,45,.12);
}
.nav-login{
  font-size:14.5px;
  font-weight:600;
  color:var(--ink);
  white-space:nowrap;
}
.nav-login:hover{color:var(--brand);}

/* ============ Buttons ============ */
.btn-main,.btn-ghost,.btn-light-outline{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-weight:600;
  font-size:15px;
  line-height:1.2;
  padding:12px 26px;
  border-radius:var(--r-pill);
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background-color var(--ease),color var(--ease),box-shadow var(--ease),transform var(--ease),border-color var(--ease);
  text-align:center;
}
.btn-main{background:var(--brand);color:#fff;box-shadow:var(--sh-1);}
.btn-main:hover{background:var(--brand-dark);color:#fff;box-shadow:var(--sh-2);}
.btn-main:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-ghost:active{transform:translateY(1px);}
.btn-light-outline{background:transparent;border-color:rgba(255,255,255,.5);color:#fff;}
.btn-light-outline:hover{background:#fff;color:var(--ink);border-color:#fff;}
.btn-main.btn-sm-pill,.btn-ghost.btn-sm-pill{padding:9px 20px;font-size:14px;}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:var(--lemon);
  color:var(--ink);
  font-size:12.5px;
  font-weight:700;
  padding:4px 12px;
  border-radius:var(--r-pill);
  line-height:1.5;
}
.tag-plain{
  display:inline-flex;
  align-items:center;
  background:rgba(18,49,46,.06);
  color:var(--ink);
  font-size:12.5px;
  font-weight:600;
  padding:4px 12px;
  border-radius:var(--r-pill);
  line-height:1.5;
}
.tag-outline{
  display:inline-flex;
  align-items:center;
  border:1px solid var(--line-strong);
  color:var(--muted);
  font-size:12.5px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  line-height:1.5;
}

/* ============ Banner ============ */
.page-banner{
  position:relative;
  min-height:240px;
  display:flex;
  align-items:center;
  background-image:linear-gradient(rgba(18,49,46,.74),rgba(18,49,46,.74)),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  border-bottom:3px solid var(--brand);
}
.page-banner .banner-inner{
  position:relative;
  z-index:2;
  padding:52px 0 46px;
  max-width:820px;
}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:rgba(255,255,255,.72);
  margin-bottom:var(--sp-4);
}
.crumb a{color:rgba(255,255,255,.82);}
.crumb a:hover{color:var(--lemon);}
.crumb span.sep{color:rgba(255,255,255,.4);}
.crumb .current{color:var(--lemon);}

.banner-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--lemon);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  margin-bottom:14px;
}
.banner-eyebrow::before{
  content:"";
  width:22px;height:3px;background:var(--lemon);border-radius:2px;
}
.page-banner h1{
  color:#fff;
  font-size:34px;
  line-height:1.35;
  margin-bottom:var(--sp-3);
}
.banner-lead{
  color:rgba(255,255,255,.86);
  font-size:16px;
  line-height:1.85;
  max-width:720px;
  margin:0;
}
.banner-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:var(--sp-4);
}
.banner-meta .tag-outline{
  border-color:rgba(255,255,255,.35);
  color:rgba(255,255,255,.88);
  background:rgba(255,255,255,.06);
}

/* ============ Sections ============ */
.section{padding:var(--sp-7) 0;}
.section.tight{padding:var(--sp-6) 0;}
.section-alt{background:var(--paper-alt);}
.section-dark{background:var(--ink);color:rgba(255,255,255,.86);}
.section-dark h2,.section-dark h3{color:#fff;}

.section-head{
  max-width:760px;
  margin-bottom:var(--sp-6);
}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--brand);
  margin-bottom:12px;
}
.section-kicker::before{
  content:"";
  width:22px;height:3px;background:var(--brand);border-radius:2px;
}
.section-title{font-size:26px;margin-bottom:14px;}
.section-desc{color:var(--muted);font-size:15.5px;margin:0;}

/* ============ Steps ============ */
.step-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:var(--sp-4);
}
.step-card{
  position:relative;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:var(--sp-5) var(--sp-4) var(--sp-4);
  box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease);
  overflow:hidden;
}
.step-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--ease);
}
.step-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.step-card:hover::before{transform:scaleX(1);}
.step-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;height:38px;
  border-radius:10px;
  background:var(--ink);
  color:var(--lemon);
  font-size:16px;
  font-weight:800;
  font-family:"SFMono-Regular",Menlo,Consolas,monospace;
  margin-bottom:var(--sp-3);
}
.step-card h3{font-size:17px;margin-bottom:10px;}
.step-card p{font-size:14.5px;color:var(--muted);margin-bottom:14px;line-height:1.8;}
.step-foot{font-size:13px;color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px;}

/* ============ Scene cards ============ */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:var(--sp-4);
}
.scene-card{
  display:flex;
  flex-direction:column;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  height:100%;
}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(242,84,45,.35);}
.scene-media{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--paper-alt);
}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out;}
.scene-card:hover .scene-media img{transform:scale(1.04);}
.scene-media .media-badge{
  position:absolute;
  top:12px;left:12px;
  background:rgba(18,49,46,.82);
  color:var(--lemon);
  font-size:12px;
  font-weight:700;
  padding:4px 10px;
  border-radius:var(--r-pill);
}
.scene-body{
  padding:var(--sp-4);
  display:flex;
  flex-direction:column;
  flex:1 1 auto;
}
.scene-body h3{font-size:17px;margin-bottom:10px;}
.scene-body p{font-size:14.5px;color:var(--muted);margin-bottom:var(--sp-3);line-height:1.8;}
.scene-link{
  margin-top:auto;
  font-size:13.5px;
  font-weight:600;
  color:var(--brand);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.scene-link i{font-size:12px;transition:transform var(--ease);}
.scene-card:hover .scene-link i{transform:translateX(3px);}

/* ============ Compare ============ */
.compare{
  position:relative;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:var(--sp-5);
  align-items:stretch;
}
.compare-panel{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:var(--sp-5);
  box-shadow:var(--sh-1);
}
.compare-panel.bad{background:#FBF7F4;border-color:rgba(242,84,45,.22);}
.compare-panel.good{background:var(--white);border-color:rgba(18,49,46,.22);}
.compare-panel h3{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  padding-bottom:14px;
  margin-bottom:var(--sp-3);
  border-bottom:1px solid var(--line);
}
.compare-panel h3 .dot{
  width:10px;height:10px;border-radius:50%;flex:0 0 10px;
}
.compare-panel.bad h3 .dot{background:var(--brand);}
.compare-panel.good h3 .dot{background:var(--ink);}
.compare-panel ul li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:14.8px;
  color:var(--text);
  padding:11px 0;
  border-bottom:1px dashed var(--line);
}
.compare-panel ul li:last-child{border-bottom:0;padding-bottom:0;}
.compare-panel ul li i{font-size:14px;margin-top:6px;flex:0 0 14px;}
.compare-panel.bad ul li i{color:#C24A26;}
.compare-panel.good ul li i{color:#1F7A5C;}
.vs-badge{
  position:absolute;
  left:50%;top:50%;
  transform:translate(-50%,-50%);
  width:52px;height:52px;
  border-radius:50%;
  background:var(--brand);
  color:#fff;
  font-weight:800;
  font-size:15px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);
  border:4px solid var(--paper);
  letter-spacing:.04em;
}

/* ============ Device split ============ */
.device-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:var(--sp-4);
}
.device-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:var(--sp-5);
  box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease);
}
.device-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.device-head{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:var(--sp-3);
}
.device-icon{
  width:44px;height:44px;
  border-radius:12px;
  background:var(--paper-alt);
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;
  flex:0 0 44px;
}
.device-head h3{margin:0;font-size:17px;}
.device-head span{display:block;font-size:13px;color:var(--muted);font-weight:400;}
.device-card ul li{
  display:flex;
  gap:10px;
  font-size:14.8px;
  color:var(--text);
  padding:9px 0;
}
.device-card ul li i{color:var(--brand);font-size:12px;margin-top:7px;flex:0 0 12px;}

/* ============ Checklist strip ============ */
.check-strip{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  margin-top:var(--sp-5);
}
.check-item{
  background:var(--white);
  padding:var(--sp-4);
}
.check-item .num{
  font-family:"SFMono-Regular",Menlo,Consolas,monospace;
  font-size:13px;
  font-weight:700;
  color:var(--brand);
  letter-spacing:.08em;
  display:block;
  margin-bottom:8px;
}
.check-item h3{font-size:15.5px;margin-bottom:6px;}
.check-item p{font-size:13.5px;color:var(--muted);margin:0;line-height:1.75;}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-acc .accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line);
  border-radius:0;
}
.faq-acc .accordion-item:first-child{border-top:1px solid var(--line);}
.faq-acc .accordion-header{margin:0;}
.faq-acc .accordion-button{
  background:transparent;
  box-shadow:none;
  border:0;
  border-radius:0;
  padding:22px 44px 22px 0;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  line-height:1.6;
  position:relative;
  transition:color var(--ease);
}
.faq-acc .accordion-button::after{
  display:none;
}
.faq-acc .accordion-button::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:3px;height:0;
  background:var(--brand);
  transform:translateY(-50%);
  transition:height var(--ease);
}
.faq-acc .accordion-button .faq-mark{
  position:absolute;
  right:0;top:50%;
  transform:translateY(-50%);
  width:26px;height:26px;
  border-radius:50%;
  border:1.5px solid var(--line-strong);
  color:var(--ink);
  display:flex;align-items:center;justify-content:center;
  font-size:11px;
  transition:background-color var(--ease),border-color var(--ease),color var(--ease);
}
.faq-acc .accordion-button:not(.collapsed){
  color:var(--brand);
  padding-left:18px;
}
.faq-acc .accordion-button:not(.collapsed)::before{height:56%;}
.faq-acc .accordion-button:not(.collapsed) .faq-mark{
  background:var(--brand);
  border-color:var(--brand);
  color:#fff;
}
.faq-acc .accordion-button:focus{box-shadow:none;outline:2px solid var(--lemon);outline-offset:-2px;}
.faq-acc .accordion-button:hover{color:var(--brand);}
.faq-acc .accordion-body{
  padding:0 44px 24px 18px;
  font-size:15px;
  color:var(--muted);
  line-height:1.9;
}

/* ============ CTA band ============ */
.cta-band{
  background:var(--ink);
  border-radius:var(--r-card);
  padding:var(--sp-6) var(--sp-5);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-5);
  flex-wrap:wrap;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:220px;height:220px;
  border-radius:50%;
  background:rgba(255,197,61,.10);
}
.cta-band .cta-text{position:relative;z-index:2;max-width:620px;}
.cta-band h2{color:#fff;font-size:24px;margin-bottom:10px;}
.cta-band p{color:rgba(255,255,255,.76);font-size:15px;margin:0;}
.cta-band .cta-actions{position:relative;z-index:2;display:flex;gap:var(--sp-3);flex-wrap:wrap;}

/* ============ Footer ============ */
.site-footer{
  background:var(--ink);
  color:rgba(255,255,255,.78);
  padding:var(--sp-7) 0 var(--sp-5);
  margin-top:var(--sp-7);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:var(--sp-5);
  padding-bottom:var(--sp-5);
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:var(--sp-3);
}
.footer-brand .brand-mark svg{stroke:var(--lemon);}
.footer-brand .brand-name{color:#fff;}
.site-footer p{color:rgba(255,255,255,.66);font-size:14px;line-height:1.85;margin:0;}
.site-footer h4{
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin:0 0 var(--sp-3);
  letter-spacing:.02em;
}
.site-footer ul li{margin-bottom:11px;}
.site-footer ul li a{
  color:rgba(255,255,255,.74);
  font-size:14px;
}
.site-footer ul li a:hover{color:var(--lemon);}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:var(--sp-3);
  flex-wrap:wrap;
  padding-top:var(--sp-4);
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ============ Responsive ============ */
@media (max-width:1199.98px){
  .channel-nav .nav-link{margin:0 11px;font-size:14.5px;}
  .nav-search{width:180px;}
}

@media (max-width:991.98px){
  .site-nav .container{padding-top:10px;padding-bottom:10px;}
  .navbar-toggler{display:block;}
  .navbar-collapse{
    flex-basis:100%;
    margin-top:12px;
    padding-top:12px;
    border-top:1px solid var(--line);
  }
  .channel-nav{
    flex-direction:column;
    align-items:stretch;
    margin-right:0;
    width:100%;
  }
  .channel-nav .nav-link{
    display:block;
    margin:0;
    padding:12px 0;
    border-bottom:1px solid var(--line);
    font-size:15.5px;
  }
  .channel-nav .nav-link::after{display:none;}
  .channel-nav .nav-link.active{color:var(--brand);}
  .nav-side{
    flex-direction:column;
    align-items:stretch;
    width:100%;
    margin-top:var(--sp-3);
    gap:12px;
  }
  .nav-search{width:100%;}
  .nav-search input{height:42px;}
  .nav-login{
    padding:10px 0;
    text-align:center;
    border:1.5px solid var(--line-strong);
    border-radius:var(--r-btn);
  }
  .nav-side .btn-main{width:100%;}

  .step-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .check-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-5) var(--sp-4);}
  .compare{grid-template-columns:1fr;gap:var(--sp-4);}
  .vs-badge{position:static;transform:none;margin:0 auto;}
  h1{font-size:29px;}
  .page-banner h1{font-size:28px;}
  .section-title{font-size:23px;}
  .section{padding:var(--sp-6) 0;}
}

@media (max-width:767.98px){
  .device-grid{grid-template-columns:1fr;}
  .cta-band{padding:var(--sp-5) var(--sp-4);}
  .cta-band .cta-actions{width:100%;}
  .cta-band .cta-actions .btn-main,
  .cta-band .cta-actions .btn-light-outline{flex:1 1 auto;}
}

@media (max-width:575.98px){
  body{font-size:15.5px;}
  .container{padding-left:16px;padding-right:16px;}
  h1{font-size:25px;}
  .page-banner h1{font-size:23px;}
  .page-banner{min-height:0;}
  .page-banner .banner-inner{padding:38px 0 34px;}
  .banner-lead{font-size:15px;}
  .section{padding:var(--sp-5) 0;}
  .section-title{font-size:21px;}
  .step-grid,
  .scene-grid,
  .check-strip,
  .footer-grid{grid-template-columns:1fr;}
  .step-card{padding:var(--sp-4);}
  .faq-acc .accordion-button{font-size:15.5px;padding:18px 40px 18px 0;}
  .faq-acc .accordion-body{padding:0 12px 20px 16px;font-size:14.5px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .btn-main,.btn-ghost{width:100%;}
  .scene-body{padding:var(--sp-3) var(--sp-3) var(--sp-4);}
}

/* roulang page: category3 */
:root{
  --brand:#F2542D;
  --brand-dark:#D8401C;
  --brand-soft:#FDEDE7;
  --accent:#FFC53D;
  --ink:#12312E;
  --ink-soft:#1D423D;
  --bg:#FBFAF7;
  --bg-alt:#F1EEE7;
  --white:#FFFFFF;
  --text:#22332F;
  --muted:#6C7B77;
  --line:rgba(18,49,46,.14);
  --line-soft:rgba(18,49,46,.08);
  --sp-1:4px;
  --sp-2:8px;
  --sp-3:16px;
  --sp-4:24px;
  --sp-5:40px;
  --sp-6:64px;
  --sp-7:96px;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,49,46,.06);
  --sh-2:0 6px 20px rgba(18,49,46,.08);
  --sh-3:0 18px 40px rgba(18,49,46,.12);
  --header-h:72px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",sans-serif;
  --mono:"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--ink);text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--brand)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:700;line-height:1.35}
h1{font-size:34px;font-weight:800}
h2{font-size:28px;font-weight:800}
h3{font-size:19px;font-weight:700}
h4{font-size:16px;font-weight:700}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
.container{max-width:1200px;padding-left:20px;padding-right:20px;margin:0 auto}
@media (min-width:1500px){.container{max-width:1320px}}

/* ---------- 通用段落 ---------- */
.section{padding:var(--sp-7) 0}
.section.alt{background:var(--bg-alt)}
.section.tight{padding:var(--sp-6) 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--sp-4);margin-bottom:var(--sp-5);flex-wrap:wrap}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--brand);font-weight:700;
  margin-bottom:var(--sp-2);
}
.section-head .eyebrow::before{content:"";width:18px;height:2px;background:var(--brand);display:inline-block}
.section-head h2{max-width:760px}
.section-head p{color:var(--muted);font-size:15px;margin-top:var(--sp-3);max-width:760px}
.link-more{font-size:15px;font-weight:600;white-space:nowrap;border-bottom:1.5px solid var(--ink);padding-bottom:2px}
.link-more:hover{border-color:var(--brand)}

/* ---------- 按钮 ---------- */
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--brand);color:#fff;font-weight:600;font-size:15px;
  padding:12px 26px;border-radius:var(--r-btn);border:1px solid var(--brand);
  box-shadow:var(--sh-1);transition:all .18s ease-out;
}
.btn-main:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px)}
.btn-main:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-pill{border-radius:var(--r-pill)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--ink);font-weight:600;font-size:15px;
  padding:11px 24px;border:1.5px solid var(--ink);border-radius:var(--r-btn);
  transition:all .18s ease-out;
}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-ghost.on-dark{color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost.on-dark:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn-sm-pill{padding:9px 20px;font-size:14px;border-radius:var(--r-pill)}
.badge-tag{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--accent);color:var(--ink);font-size:12px;font-weight:700;
  padding:4px 12px;border-radius:var(--r-pill);letter-spacing:.02em;
}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--brand-soft);color:var(--brand-dark);font-size:12px;font-weight:700;
  padding:4px 12px;border-radius:var(--r-pill);
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,250,247,.96);
  border-bottom:1px solid var(--line-soft);
  transition:box-shadow .2s ease-out,background .2s ease-out;
  backdrop-filter:saturate(140%) blur(0px);
}
.site-header.is-scrolled{box-shadow:var(--sh-2);background:rgba(251,250,247,.96);border-bottom-color:transparent}
.site-nav{padding:0;min-height:var(--header-h)}
.site-nav .container{display:flex;align-items:center;min-height:var(--header-h);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;padding:0;margin-right:var(--sp-5)}
.brand-mark{
  width:24px;height:24px;flex:0 0 24px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1.5px solid var(--brand);border-radius:7px;background:#fff;
}
.brand-mark svg{width:16px;height:16px}
.brand-name{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:.01em}
.channel-nav{flex-direction:row;align-items:center;gap:var(--sp-1);margin:0}
.channel-nav .nav-link{
  position:relative;color:var(--ink-soft);font-size:15px;font-weight:500;
  padding:8px 14px;border-radius:8px;transition:color .18s ease-out;
}
.channel-nav .nav-link:hover{color:var(--brand)}
.channel-nav .nav-link.active{color:var(--brand);font-weight:700}
.channel-nav .nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-22px;height:3px;
  background:var(--brand);border-radius:3px 3px 0 0;
}
.nav-side{display:flex;align-items:center;gap:var(--sp-3);margin-left:auto}
.nav-search{
  display:flex;align-items:center;gap:8px;
  width:220px;background:#fff;border:1.5px solid var(--line);
  border-radius:var(--r-pill);padding:7px 14px;transition:all .18s ease-out;
}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(242,84,45,.12)}
.nav-search svg{width:16px;height:16px;stroke:var(--muted);flex:0 0 16px}
.nav-search input{
  border:0;outline:0;background:transparent;font-size:14px;width:100%;color:var(--text);
}
.nav-search input::placeholder{color:#9AA6A2}
.nav-login{font-size:15px;font-weight:600;color:var(--ink-soft)}
.navbar-toggler{
  border:1.5px solid var(--line);border-radius:10px;padding:8px 10px;margin-left:auto;
  background:#fff;box-shadow:none!important;
  display:none;flex-direction:column;gap:4px;justify-content:center;align-items:center;
}
.navbar-toggler .toggler-bar{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}
@media (max-width:991.98px){
  .navbar-toggler{display:flex}
  .brand{margin-right:var(--sp-3)}
  .channel-nav{flex-direction:column;align-items:stretch;width:100%;margin-top:var(--sp-4);gap:0}
  .channel-nav .nav-link{padding:12px 4px;border-bottom:1px solid var(--line-soft)}
  .channel-nav .nav-link.active::after{display:none}
  .nav-side{flex-direction:column;align-items:stretch;width:100%;margin:var(--sp-4) 0 var(--sp-4);gap:var(--sp-3)}
  .nav-search{width:100%}
  .nav-side .btn-main{width:100%;justify-content:center}
  .nav-login{text-align:center;padding:6px 0}
}

/* ---------- 页面横幅 ---------- */
.page-banner{
  position:relative;
  padding:var(--sp-7) 0 var(--sp-6);
  background-image:linear-gradient(100deg,rgba(18,49,46,.92) 0%,rgba(18,49,46,.78) 55%,rgba(18,49,46,.55) 100%),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  color:#fff;
}
.page-banner .crumbs{font-size:13px;color:rgba(255,255,255,.66);margin-bottom:var(--sp-4)}
.page-banner .crumbs a{color:rgba(255,255,255,.86)}
.page-banner .crumbs a:hover{color:var(--accent)}
.page-banner .crumbs span.sep{margin:0 8px;opacity:.5}
.page-banner h1{color:#fff;max-width:900px;font-size:38px;line-height:1.3}
.page-banner .lead{
  margin-top:var(--sp-4);max-width:720px;
  font-size:16.5px;line-height:1.85;color:rgba(255,255,255,.88);
}
.page-banner .banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:var(--sp-5)}
.page-banner .banner-tag{
  display:inline-flex;align-items:center;gap:7px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);
  color:#fff;font-size:13px;font-weight:600;padding:6px 14px;border-radius:var(--r-pill);
}
.page-banner .banner-tag i{color:var(--accent)}

/* ---------- 快速定位 ---------- */
.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-4)}
.quick-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-card);
  padding:var(--sp-5) var(--sp-4);box-shadow:var(--sh-1);transition:all .18s ease-out;
  position:relative;overflow:hidden;
}
.quick-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.quick-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--line)}
.quick-card:hover::before{transform:scaleX(1)}
.quick-icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-soft);
  display:inline-flex;align-items:center;justify-content:center;margin-bottom:var(--sp-3);
}
.quick-icon svg{width:22px;height:22px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.quick-card h3{margin-bottom:var(--sp-3)}
.quick-card p{color:var(--muted);font-size:15px;line-height:1.8;margin:0}

/* ---------- 问题卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-4)}
.problem-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);transition:all .18s ease-out;
  display:flex;flex-direction:column;height:100%;
}
.problem-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--line)}
.problem-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg-alt)}
.problem-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s ease-out}
.problem-card:hover .problem-thumb img{transform:scale(1.04)}
.problem-thumb .badge-tag{position:absolute;left:12px;top:12px}
.problem-body{padding:var(--sp-4);display:flex;flex-direction:column;flex:1 1 auto}
.problem-body h3{margin-bottom:var(--sp-2);font-size:18px}
.problem-body .desc{
  color:var(--muted);font-size:14.5px;line-height:1.8;margin:0 0 var(--sp-4);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.problem-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line-soft);padding-top:var(--sp-3);
  font-size:13px;color:var(--muted);
}
.problem-foot .arrow{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.problem-card:hover .problem-foot .arrow i{transform:translateX(3px)}
.problem-foot .arrow i{transition:transform .18s ease-out}

/* ---------- 排查流程 ---------- */
.steps-wrap{background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-card);padding:var(--sp-6) var(--sp-5);box-shadow:var(--sh-1)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--sp-4)}
.step{position:relative;padding-right:var(--sp-3)}
.step .num{
  width:36px;height:36px;border-radius:10px;background:var(--ink);color:var(--accent);
  font-family:var(--mono);font-size:15px;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin-bottom:var(--sp-3);
}
.step h3{font-size:17px;margin-bottom:var(--sp-2)}
.step p{color:var(--muted);font-size:14.5px;margin:0}

/* ---------- 对比区 ---------- */
.compare{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);position:relative;
}
.compare-col{padding:var(--sp-5)}
.compare-col.before{background:var(--bg-alt)}
.compare-col.after{background:#fff}
.compare-col h3{display:flex;align-items:center;gap:10px;margin-bottom:var(--sp-4);font-size:18px}
.compare-col h3 .dot{width:10px;height:10px;border-radius:50%;display:inline-block}
.compare-col.before h3 .dot{background:#B4BDB9}
.compare-col.after h3 .dot{background:var(--brand)}
.compare-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px 0;border-bottom:1px dashed var(--line-soft);font-size:15px;
}
.compare-list li:last-child{border-bottom:0}
.compare-list li i{flex:0 0 18px;margin-top:4px;font-size:14px}
.compare-list li i.fa-xmark{color:#A9B4B0}
.compare-list li i.fa-check{color:var(--brand)}
.compare-vs{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:46px;height:46px;border-radius:50%;background:var(--ink);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.04em;
  box-shadow:0 0 0 6px var(--bg);
}

/* ---------- 指标条 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--sp-4)}
.metric{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-card);
  padding:var(--sp-4);box-shadow:var(--sh-1);
}
.metric .value{font-family:var(--mono);font-size:34px;font-weight:700;color:var(--brand);line-height:1.1}
.metric .value small{font-size:14px;color:var(--muted);margin-left:4px;font-family:var(--font)}
.metric .label{font-size:14px;color:var(--muted);margin-top:var(--sp-2);padding-top:var(--sp-3);border-top:1px solid var(--line-soft)}

/* ---------- FAQ ---------- */
.faq-accordion .accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;
}
.faq-accordion .accordion-header{margin:0}
.faq-accordion .accordion-button{
  background:transparent;box-shadow:none;border-radius:0;
  font-size:17px;font-weight:600;color:var(--ink);
  padding:22px 44px 22px 16px;border-left:3px solid transparent;
  transition:color .18s ease-out,border-color .18s ease-out;
}
.faq-accordion .accordion-button:hover{color:var(--brand)}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--brand);background:transparent;border-left-color:var(--brand);
}
.faq-accordion .accordion-button::after{
  background-image:none;width:12px;height:12px;margin-right:8px;
  border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);
  transform:rotate(45deg);transition:transform .22s ease-out,border-color .18s ease-out;
}
.faq-accordion .accordion-button:not(.collapsed)::after{
  transform:rotate(-135deg);border-color:var(--brand);
}
.faq-accordion .accordion-body{
  padding:0 44px var(--sp-4) 19px;color:var(--muted);font-size:15px;line-height:1.9;
}
.faq-accordion .accordion-collapse{border:0}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--ink);color:#fff;border-radius:var(--r-card);
  padding:var(--sp-6) var(--sp-6);
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-5);
  box-shadow:var(--sh-3);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-40px;top:-40px;width:200px;height:200px;
  background:radial-gradient(circle,rgba(255,197,61,.18),transparent 70%);
}
.cta-band h2{color:#fff;font-size:26px;margin-bottom:var(--sp-2)}
.cta-band p{color:rgba(255,255,255,.78);font-size:15px;margin:0;max-width:620px}
.cta-band .cta-actions{display:flex;gap:var(--sp-3);flex-wrap:wrap;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.8);padding:var(--sp-7) 0 var(--sp-4);margin-top:var(--sp-7)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:var(--sp-5)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:var(--sp-3)}
.footer-brand .brand-mark{background:transparent;border-color:var(--accent)}
.footer-brand .brand-mark svg{stroke:var(--accent)}
.footer-brand .brand-name{color:#fff;font-size:17px;font-weight:800}
.site-footer p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);max-width:340px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:var(--sp-3);letter-spacing:.02em}
.site-footer ul li{margin-bottom:10px}
.site-footer ul li a{color:rgba(255,255,255,.78);font-size:14.5px}
.site-footer ul li a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:var(--sp-6);padding-top:var(--sp-4);border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:var(--sp-3);flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.56);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .card-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:991.98px){
  :root{--sp-7:64px;--sp-6:48px}
  h1{font-size:30px}
  .page-banner h1{font-size:30px}
  h2{font-size:24px}
  .quick-grid{grid-template-columns:1fr 1fr}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr 1fr;gap:var(--sp-5)}
  .metrics{grid-template-columns:1fr 1fr}
  .compare{grid-template-columns:1fr}
  .compare-vs{position:relative;left:auto;top:auto;transform:none;margin:0 auto;box-shadow:none}
  .compare-col.before,.compare-col.after{padding:var(--sp-5) var(--sp-4)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-5)}
  .cta-band{flex-direction:column;align-items:flex-start;padding:var(--sp-5) var(--sp-4)}
}
@media (max-width:575.98px){
  :root{--sp-7:48px;--sp-6:40px}
  body{font-size:15.5px}
  h1{font-size:25px}
  .page-banner{padding:var(--sp-6) 0 var(--sp-5)}
  .page-banner h1{font-size:25px}
  .page-banner .lead{font-size:15px}
  h2{font-size:22px}
  .quick-grid{grid-template-columns:1fr}
  .card-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .steps-wrap{padding:var(--sp-5) var(--sp-4)}
  .section-head{margin-bottom:var(--sp-4)}
  .cta-band .cta-actions{width:100%}
  .cta-band .cta-actions .btn-main,.cta-band .cta-actions .btn-ghost{width:100%}
}