/* roulang page: index */
:root{
  --brand-700:#1B3A6B;
  --brand-600:#2D5BA8;
  --brand-200:#C9DAF2;
  --brand-050:#F2F6FC;
  --accent-600:#C4692A;
  --accent-050:#FBF0E6;
  --ink-900:#16202F;
  --ink-600:#55657C;
  --ink-400:#8A97A8;
  --surface:#FFFFFF;
  --bg:#FBFCFE;
  --bg-alt:#F5F8FC;
  --line:#E4E9F1;
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(22,32,47,.05), 0 14px 30px -20px rgba(22,32,47,.20);
  --shadow-hover:0 24px 44px -26px rgba(22,32,47,.28);
  --container:1200px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-latin:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:var(--brand-600);text-decoration:none;transition:color .25s ease;}
a:hover{color:var(--brand-700);}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:0;font-family:var(--font-cn);}
h1{font-size:40px;line-height:1.3;font-weight:700;}
h2{font-size:30px;line-height:1.35;font-weight:650;}
h3{font-size:20px;line-height:1.5;font-weight:600;}
p{margin:0 0 1.2em;}
ul{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:3px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-alt{background:var(--bg-alt);}
.section-head{margin-bottom:48px;max-width:760px;}
.section-head.center{max-width:720px;margin-left:auto;margin-right:auto;text-align:center;}
.section-title{margin-bottom:16px;}
.section-desc{color:var(--ink-600);font-size:16.5px;margin:0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-latin);font-size:12px;font-weight:600;
  letter-spacing:.06em;text-transform:uppercase;
  color:var(--accent-600);background:var(--accent-050);
  border-radius:999px;padding:6px 14px;margin-bottom:20px;
}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--surface);
  border-bottom:1px solid var(--line);transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 22px -18px rgba(22,32,47,.45);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;min-height:76px;gap:24px;}
.logo{
  font-size:19px;font-weight:700;color:var(--brand-700);
  letter-spacing:0;white-space:nowrap;
}
.logo:hover{color:var(--brand-600);}
.main-nav{display:flex;align-items:center;gap:36px;}
.nav-link{
  position:relative;font-size:16px;font-weight:500;color:var(--ink-900);
  padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--brand-600);transition:width .25s ease;
}
.nav-link:hover{color:var(--brand-600);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--brand-700);font-weight:600;}
.nav-link.is-active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:16px;}
.nav-cta{
  font-size:15px;font-weight:600;color:var(--brand-700);
  border:1.5px solid var(--brand-200);border-radius:var(--radius-btn);
  padding:9px 18px;background:var(--surface);
}
.nav-cta:hover{background:var(--brand-050);color:var(--brand-700);}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:var(--surface);
  border-radius:var(--radius-btn);padding:0;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink-900);border-radius:2px;}
.mobile-panel{
  display:none;border-top:1px solid var(--line);background:var(--surface);
  padding:8px 0 20px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel a.m-link{
  display:block;line-height:56px;padding:0 24px;color:var(--ink-900);
  font-size:16px;font-weight:500;border-bottom:1px solid var(--line);
}
.mobile-panel a.m-link:hover{background:var(--bg-alt);color:var(--brand-600);}
.mobile-panel a.m-link.is-active{color:var(--brand-700);font-weight:600;}
.mobile-panel .m-cta{margin:20px 24px 0;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;border-radius:var(--radius-btn);
  padding:15px 26px;min-height:48px;border:1.5px solid transparent;
  cursor:pointer;transition:all .25s ease;text-align:center;
}
.btn-primary{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:var(--surface);color:var(--brand-700);border-color:var(--brand-200);}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-200);}
.btn-text{
  background:transparent;border:0;padding:8px 0;min-height:0;color:var(--brand-600);
  font-size:15px;font-weight:600;
}
.btn-text .arrow{display:inline-block;transition:transform .25s ease;}
.btn-text:hover{color:var(--brand-700);}
.btn-text:hover .arrow{transform:translateX(4px);}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(circle at 88% 12%, rgba(201,218,242,.55), transparent 52%),
    linear-gradient(180deg,#FFFFFF 0%,#F7FAFE 100%);
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(to right, rgba(45,91,168,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(45,91,168,.055) 1px, transparent 1px);
  background-size:56px 56px;
}
.hero-inner{position:relative;padding:88px 0 84px;}
.hero-grid{align-items:center;}
.hero-copy{max-width:640px;}
.hero h1{margin-bottom:20px;}
.hero-sub{font-size:17px;line-height:1.85;color:var(--ink-600);margin-bottom:32px;max-width:560px;}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;}
.point-chip{
  font-size:13px;font-weight:600;color:var(--brand-700);
  background:var(--surface);border:1px solid var(--brand-200);
  border-radius:999px;padding:8px 15px;
}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:4/3.1;object-fit:cover;border-radius:var(--radius-img);
  box-shadow:var(--shadow-card);border:1px solid var(--line);
}
.hero-note{
  position:absolute;left:-18px;bottom:-22px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:16px 20px;max-width:260px;
}
.hero-note .n-label{
  font-family:var(--font-latin);font-size:11px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--accent-600);font-weight:600;
}
.hero-note .n-text{font-size:14px;line-height:1.7;color:var(--ink-600);margin:6px 0 0;}

/* ---------- story ---------- */
.story-grid{align-items:center;}
.story-media img{
  width:100%;aspect-ratio:4/3.2;object-fit:cover;border-radius:var(--radius-img);
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.story-body p{color:var(--ink-600);}
.story-list{margin-top:32px;border-top:1px solid var(--line);}
.story-item{
  display:flex;gap:20px;padding:22px 0;border-bottom:1px solid var(--line);
}
.story-num{
  font-family:var(--font-latin);font-size:15px;font-weight:700;color:var(--accent-600);
  letter-spacing:.06em;min-width:34px;padding-top:3px;
}
.story-item h3{font-size:17px;margin-bottom:6px;}
.story-item p{margin:0;font-size:15.5px;color:var(--ink-600);}

/* ---------- cards ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;height:100%;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--brand-200);}
.card-media{overflow:hidden;}
.card-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;
  transition:transform .35s ease;
}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex:1;}
.badge{
  display:inline-block;font-size:13px;font-weight:600;color:var(--accent-600);
  background:var(--accent-050);border-radius:999px;padding:5px 12px;margin-bottom:14px;
  align-self:flex-start;
}
.card-title{
  font-size:20px;line-height:1.5;font-weight:600;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-text{
  font-size:15.5px;color:var(--ink-600);margin:0 0 18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  gap:12px;font-size:14px;color:var(--ink-400);
}
.card-meta .dot::before{content:"·";color:var(--ink-400);margin-right:8px;}

/* ---------- featured ---------- */
.featured-main .card-media img{aspect-ratio:16/9;}
.featured-main .card-title{font-size:24px;}
.stack-card{display:flex;gap:18px;padding:20px;}
.stack-card .thumb{flex:0 0 118px;}
.stack-card .thumb img{width:118px;aspect-ratio:1/1;object-fit:cover;border-radius:10px;}
.stack-card .body h3{font-size:17px;margin-bottom:8px;line-height:1.5;}
.stack-card .body p{margin:0 0 10px;font-size:14.5px;color:var(--ink-600);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.stack-card .body .meta{font-size:13.5px;color:var(--ink-400);}

/* ---------- news ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;}
.news-grid .news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:26px;height:100%;
  display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.news-grid .news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--brand-200);}
.news-card h3{font-size:18px;line-height:1.55;margin:14px 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card h3 a{color:var(--ink-900);}
.news-card h3 a:hover{color:var(--brand-600);}
.news-card .excerpt{
  font-size:15px;color:var(--ink-600);margin:0 0 20px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);padding-top:16px;font-size:14px;color:var(--ink-400);
}
.news-card .foot .go{color:var(--brand-600);font-weight:600;}
.empty-state{
  border:1px dashed var(--brand-200);background:var(--brand-050);
  border-radius:var(--radius-card);padding:56px 24px;text-align:center;
}
.empty-state .ring{
  width:52px;height:52px;border:1.5px solid var(--brand-200);border-radius:50%;
  margin:0 auto 18px;position:relative;background:var(--surface);
}
.empty-state .ring::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:14px;height:14px;border-radius:3px;background:var(--accent-050);
  border:1.5px solid var(--accent-600);
}
.empty-state p{color:var(--ink-600);margin:0 0 20px;}

/* ---------- stats & quote ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat{padding:32px 24px;border-right:1px solid var(--line);}
.stat:last-child{border-right:0;}
.stat .num{
  font-family:var(--font-latin);font-size:34px;font-weight:700;color:var(--accent-600);
  line-height:1.1;letter-spacing:.01em;
}
.stat .num span{font-size:16px;margin-left:4px;color:var(--ink-600);font-weight:600;}
.stat .label{font-size:14.5px;color:var(--ink-600);margin-top:10px;}
.quote{
  margin-top:56px;background:var(--brand-050);border-left:3px solid var(--brand-600);
  border-radius:0 var(--radius-card) var(--radius-card) 0;padding:28px 32px;
}
.quote p{font-size:17px;color:var(--ink-900);margin:0 0 12px;}
.quote .from{font-size:14px;color:var(--ink-400);margin:0;}

/* ---------- faq ---------- */
.accordion{border:0;background:transparent;}
.accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent;}
.accordion-item:first-child{border-top:1px solid var(--line);}
.accordion-title{
  font-size:17px;font-weight:600;color:var(--ink-900);
  padding:24px 44px 24px 18px;border:0;background:transparent;
  position:relative;line-height:1.6;
}
.accordion-title::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;background:var(--brand-600);border-radius:2px;
  transition:height .25s ease;
}
.accordion-title:hover{color:var(--brand-600);background:transparent;}
.accordion-item.is-active .accordion-title::before{height:26px;}
.accordion-item.is-active .accordion-title{color:var(--brand-700);}
.accordion-content{padding:0 44px 26px 18px;background:transparent;border:0;color:var(--ink-600);}
.accordion-content p{margin:0;font-size:16px;line-height:1.85;color:var(--ink-600);}

/* ---------- cta ---------- */
.cta-wrap{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.cta-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:44px 46px;
}
.cta-grid{align-items:center;}
.cta-card h2{margin-bottom:14px;}
.cta-card p{color:var(--ink-600);margin:0;}
.form-row{display:flex;gap:12px;flex-wrap:wrap;}
.input{
  flex:1 1 220px;min-height:50px;border:1px solid var(--line);border-radius:var(--radius-btn);
  padding:12px 16px;font-size:15.5px;color:var(--ink-900);background:var(--surface);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.input::placeholder{color:var(--ink-400);}
.input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(45,91,168,.12);}
.form-hint{font-size:14px;color:var(--ink-400);margin:14px 0 0;}
.form-note{font-size:14px;color:var(--brand-600);margin:12px 0 0;display:none;}
.form-note.is-on{display:block;}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-700);color:#DCE6F5;padding:72px 0 28px;}
.foot-grid{gap:0;}
.foot-brand{max-width:320px;}
.foot-brand .f-logo{font-size:19px;font-weight:700;color:#fff;display:inline-block;margin-bottom:16px;}
.foot-brand p{font-size:15px;line-height:1.8;color:#B9CBE6;margin:0;}
.foot-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;}
.foot-col ul li{margin-bottom:12px;}
.foot-col ul li a{font-size:15px;color:#B9CBE6;}
.foot-col ul li a:hover{color:#fff;}
.foot-col p{font-size:15px;color:#B9CBE6;margin:0 0 12px;line-height:1.8;}
.foot-sep{border-top:1px solid rgba(255,255,255,.16);margin:52px 0 24px;}
.foot-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;}
.foot-bottom p{font-size:14px;color:#9DB3D4;margin:0;}
.foot-bottom .domain{font-family:var(--font-latin);letter-spacing:.02em;}

/* ---------- responsive ---------- */
@media screen and (max-width:1024px){
  h1{font-size:34px;}
  h2{font-size:26px;}
  .hero-inner{padding:64px 0 60px;}
  .hero-note{left:auto;right:12px;bottom:-18px;max-width:230px;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(2){border-right:0;}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line);}
}
@media screen and (max-width:880px){
  .main-nav,.nav-actions{display:none;}
  .nav-toggle{display:flex;}
  .section{padding:64px 0;}
}
@media screen and (max-width:768px){
  body{font-size:16px;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .hero-inner{padding:48px 0 56px;}
  .hero-sub{font-size:16px;}
  .hero-btns{gap:12px;}
  .hero-btns .btn{flex:1 1 auto;}
  .hero-visual{margin-top:36px;}
  .hero-note{position:static;margin-top:16px;max-width:none;}
  .news-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .cta-card{padding:30px 22px;}
  .stats{grid-template-columns:1fr 1fr;}
  .stat{padding:24px 18px;}
  .stat .num{font-size:28px;}
  .site-footer{padding:56px 0 24px;}
  .foot-brand{margin-bottom:36px;}
  .foot-col{margin-bottom:32px;}
}
@media screen and (max-width:480px){
  h1{font-size:28px;}
  h2{font-size:22px;}
  .hero h1{margin-bottom:16px;}
  .hero-btns{flex-direction:column;align-items:stretch;}
  .hero-btns .btn{width:100%;}
  .stats{grid-template-columns:1fr;}
  .stat{border-right:0;border-bottom:1px solid var(--line);}
  .stat:last-child{border-bottom:0;}
  .stack-card{flex-direction:column;gap:14px;}
  .stack-card .thumb,.stack-card .thumb img{flex:none;width:100%;}
  .stack-card .thumb img{aspect-ratio:16/10;}
  .accordion-title{padding:20px 36px 20px 14px;font-size:16px;}
  .accordion-content{padding:0 36px 22px 14px;}
}

/* roulang page: category1 */
:root{
  --brand-700:#1B3A6B;
  --brand-600:#2D5BA8;
  --brand-200:#C9DAF2;
  --brand-050:#F2F6FC;
  --accent-600:#C4692A;
  --accent-050:#FBF0E6;
  --ink-900:#16202F;
  --ink-600:#55657C;
  --ink-400:#8A97A8;
  --surface:#FFFFFF;
  --bg:#FBFCFE;
  --bg-alt:#F5F8FC;
  --line:#E4E9F1;
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(22,32,47,.05),0 14px 30px -20px rgba(22,32,47,.20);
  --shadow-hover:0 24px 44px -26px rgba(22,32,47,.28);
  --font-cn:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-latin:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .22s ease;}
a:hover{color:var(--brand-700);}
ul,ol,dl,dd{margin:0;padding:0;list-style:none;}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0;font-weight:650;color:var(--ink-900);letter-spacing:0;line-height:1.4;}
button,input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:30px;line-height:1.35;font-weight:650;}
.section-head .sub{margin-top:12px;color:var(--ink-600);font-size:16.5px;line-height:1.8;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-latin);font-size:12px;font-weight:600;
  letter-spacing:.06em;text-transform:uppercase;
  color:var(--accent-600);background:var(--accent-050);
  padding:5px 12px;border-radius:999px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-600);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 24px -18px rgba(22,32,47,.30);}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:76px;gap:24px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900);font-size:19px;font-weight:650;}
.brand:hover{color:var(--brand-700);}
.brand-mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 26px;
  background:var(--brand-600);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:8px;border-radius:3px;
  background:var(--accent-600);
}
.main-nav{display:flex;align-items:center;gap:36px;}
.nav-link{
  position:relative;font-size:16px;font-weight:500;color:var(--ink-600);
  padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.nav-link:hover{color:var(--brand-600);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink-900);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink-900);transition:.22s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:72px 0 64px;
  background:
    linear-gradient(180deg,rgba(242,246,252,.92),rgba(251,252,254,.98)),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(to right,rgba(45,91,168,.06) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(45,91,168,.06) 1px,transparent 1px);
  background-size:44px 44px;
}
.page-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-400);margin-bottom:26px;}
.crumbs a{color:var(--ink-400);}
.crumbs a:hover{color:var(--brand-600);}
.crumbs .sep{color:var(--brand-200);}
.crumbs .current{color:var(--ink-900);}
.page-hero h1{font-size:40px;line-height:1.3;font-weight:700;max-width:900px;}
.page-hero .lede{margin-top:18px;max-width:720px;font-size:17px;line-height:1.85;color:var(--ink-600);}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;
  background:var(--brand-050);border:1px solid var(--brand-200);
  color:var(--brand-700);font-size:13px;font-weight:600;
}
.tag--accent{background:var(--accent-050);border-color:#F0D9C4;color:var(--accent-600);}

/* ---------- layout ---------- */
.layout{padding:80px 0 96px;}
.toc-card{
  position:sticky;top:104px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-card);
}
.toc-title{
  font-family:var(--font-latin);font-size:12px;font-weight:600;letter-spacing:.06em;
  text-transform:uppercase;color:var(--ink-400);margin-bottom:14px;
}
.toc-card ul li + li{border-top:1px solid var(--line);}
.toc-card ul a{
  display:block;padding:12px 0 12px 14px;position:relative;
  font-size:15px;color:var(--ink-600);line-height:1.6;
}
.toc-card ul a::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;background:var(--brand-600);border-radius:2px;transition:height .22s ease;
}
.toc-card ul a:hover{color:var(--brand-700);background:var(--bg-alt);}
.toc-card ul a:hover::before{height:18px;}
.toc-note{
  margin-top:20px;padding-top:18px;border-top:1px solid var(--line);
  font-size:14px;color:var(--ink-400);line-height:1.7;
}

.article-body{max-width:840px;}
.article-body > section + section{margin-top:56px;}
.article-body h2{
  font-size:26px;line-height:1.4;margin-bottom:18px;
  padding-left:16px;border-left:4px solid var(--brand-600);
}
.article-body h3{font-size:20px;font-weight:600;margin:30px 0 12px;}
.article-body p{font-size:17px;line-height:1.9;color:var(--ink-600);}
.article-body p strong{color:var(--ink-900);font-weight:600;}
.article-body ul.dotlist{margin:18px 0 22px;}
.article-body ul.dotlist li{
  position:relative;padding-left:22px;margin-bottom:10px;
  font-size:17px;line-height:1.85;color:var(--ink-600);
}
.article-body ul.dotlist li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:6px;height:6px;background:var(--brand-600);border-radius:1px;
}
.article-body ol.numlist{counter-reset:n;margin:18px 0 22px;}
.article-body ol.numlist li{
  counter-increment:n;position:relative;padding-left:38px;margin-bottom:14px;
  font-size:17px;line-height:1.85;color:var(--ink-600);
}
.article-body ol.numlist li::before{
  content:counter(n,decimal-leading-zero);
  position:absolute;left:0;top:.18em;
  font-family:var(--font-latin);font-size:14px;font-weight:700;
  color:var(--accent-600);letter-spacing:.04em;
}
.figure{margin:28px 0;}
.figure img{border-radius:var(--radius-img);width:100%;object-fit:cover;}
.figure figcaption{margin-top:10px;font-size:14px;line-height:1.7;color:var(--ink-400);}
.quote{
  margin:28px 0;padding:20px 24px;
  background:var(--brand-050);border-left:3px solid var(--brand-600);
  border-radius:0 var(--radius-img) var(--radius-img) 0;
  font-size:17px;line-height:1.85;color:var(--ink-900);
}

/* ---------- spec grid ---------- */
.spec-grid{margin-top:8px;}
.spec-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;height:100%;box-shadow:var(--shadow-card);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.spec-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--brand-200);}
.spec-item dt{
  font-size:13px;font-weight:600;color:var(--accent-600);
  background:var(--accent-050);display:inline-block;padding:4px 12px;border-radius:999px;margin-bottom:14px;
}
.spec-item dd{font-size:16.5px;line-height:1.8;color:var(--ink-600);}
.spec-item dd b{color:var(--ink-900);font-weight:600;}

/* ---------- FAQ ---------- */
.faq-wrap{margin-top:8px;}
.faq-wrap .accordion{
  background:transparent;border:none;margin:0;
  border-top:1px solid var(--line);
}
.faq-wrap .accordion .accordion-item{
  background:transparent;border-bottom:1px solid var(--line);
}
.faq-wrap .accordion .accordion-title{
  position:relative;border:none;background:transparent;
  padding:24px 56px 24px 20px;
  font-size:17px;font-weight:600;color:var(--ink-900);line-height:1.6;
}
.faq-wrap .accordion .accordion-title::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%) scaleY(0);
  width:3px;height:22px;background:var(--brand-600);border-radius:2px;transition:transform .22s ease;
}
.faq-wrap .accordion .accordion-title::after{
  content:"";position:absolute;right:18px;top:50%;
  width:10px;height:10px;border-right:1.5px solid var(--ink-400);border-bottom:1.5px solid var(--ink-400);
  transform:translateY(-70%) rotate(45deg);transition:transform .25s ease;
}
.faq-wrap .accordion .accordion-title:hover{color:var(--brand-600);background:var(--bg-alt);}
.faq-wrap .accordion .accordion-title[aria-expanded="true"]::before{transform:translateY(-50%) scaleY(1);}
.faq-wrap .accordion .accordion-title[aria-expanded="true"]::after{transform:translateY(-30%) rotate(-135deg);}
.faq-wrap .accordion .accordion-content{
  background:transparent;border:none;padding:0 56px 24px 20px;
  color:var(--ink-600);font-size:16.5px;line-height:1.85;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;transition:all .22s ease;
}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:var(--brand-200);color:var(--brand-700);}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-700);}
.btn-link{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--brand-600);
}
.btn-link .arrow{transition:transform .22s ease;}
.btn-link:hover .arrow{transform:translateX(4px);}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-050);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:72px 0;
}
.cta-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:36px;box-shadow:var(--shadow-card);
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-card h2{font-size:24px;line-height:1.45;}
.cta-card p{margin-top:12px;color:var(--ink-600);font-size:16.5px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto;}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-700);color:#DCE6F5;padding:72px 0 28px;}
.site-footer .f-logo{display:inline-block;font-size:19px;font-weight:650;color:#fff;margin-bottom:14px;}
.site-footer .f-logo:hover{color:var(--brand-200);}
.site-footer p{font-size:14.5px;line-height:1.8;color:#B9C9E2;margin:0 0 8px;}
.foot-grid{padding-bottom:44px;}
.foot-col h4{
  font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:0;
}
.foot-col ul li{margin-bottom:10px;}
.foot-col ul a{font-size:14.5px;color:#B9C9E2;}
.foot-col ul a:hover{color:#fff;}
.foot-brand{border-right:1px solid rgba(255,255,255,.12);padding-right:28px;}
.foot-sep{height:1px;background:rgba(255,255,255,.14);}
.foot-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px;padding-top:22px;font-size:14px;color:#9DB2D2;
}
.foot-bottom .domain{font-family:var(--font-latin);letter-spacing:.02em;color:#8FA6C8;margin:0;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .page-hero h1{font-size:34px;}
  .article-body{max-width:none;}
  .toc-card{position:static;margin-bottom:32px;}
  .foot-brand{border-right:none;padding-right:0;}
}
@media (max-width:768px){
  .section{padding:56px 0;}
  .layout{padding:56px 0 64px;}
  .page-hero{padding:52px 0 48px;}
  .page-hero h1{font-size:28px;line-height:1.35;}
  .page-hero .lede{font-size:16px;}
  .section-head h2{font-size:24px;}
  .article-body h2{font-size:22px;}
  .article-body p,.article-body ul.dotlist li,.article-body ol.numlist li{font-size:16.5px;}
  .cta-card{flex-direction:column;align-items:flex-start;padding:28px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--surface);border-bottom:1px solid var(--line);
    padding:8px 24px 20px;
    box-shadow:0 18px 32px -24px rgba(22,32,47,.35);
    display:none;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{
    padding:0;min-height:56px;display:flex;align-items:center;
    border-bottom:1px solid var(--line);font-size:16px;
  }
  .nav-link::after{display:none;}
  .nav-link.is-active{color:var(--brand-600);}
  .main-nav .nav-cta-mobile{
    margin-top:16px;display:flex;align-items:center;justify-content:center;
    min-height:46px;border:1px solid var(--brand-200);border-radius:var(--radius-btn);
    color:var(--brand-700);font-size:15px;font-weight:600;background:var(--brand-050);
  }
  .foot-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:480px){
  .container{padding:0 18px;}
  .brand{font-size:17px;}
  .page-hero h1{font-size:28px;}
  .btn{width:100%;}
  .faq-wrap .accordion .accordion-title{padding:20px 48px 20px 16px;font-size:16px;}
  .faq-wrap .accordion .accordion-content{padding:0 16px 20px 16px;}
}
@media (min-width:769px){
  .nav-cta-mobile{display:none;}
}

/* roulang page: article */
:root{
  --brand-700:#1B3A6B;
  --brand-600:#2D5BA8;
  --brand-200:#C9DAF2;
  --brand-050:#F2F6FC;
  --accent-600:#C4692A;
  --accent-050:#FBF0E6;
  --ink-900:#16202F;
  --ink-600:#55657C;
  --ink-400:#8A97A8;
  --surface:#FFFFFF;
  --bg:#FBFCFE;
  --bg-alt:#F5F8FC;
  --line:#E4E9F1;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-card:0 1px 2px rgba(22,32,47,.05),0 14px 30px -20px rgba(22,32,47,.20);
  --shadow-hover:0 24px 44px -26px rgba(22,32,47,.28);
  --font-cn:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-lat:"Inter",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .22s ease}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:0;color:var(--ink-900);line-height:1.35}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-200);color:var(--brand-700)}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-head{margin-bottom:44px}
.section-head h2{font-size:30px;font-weight:650}
.section-head .sub{margin-top:12px;color:var(--ink-600);max-width:720px}
.eyebrow{font-family:var(--font-lat);font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-600)}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* 栅格间距统一 24px */
.grid-x.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-x.grid-margin-x>.cell{width:calc(100% - 24px);margin-left:12px;margin-right:12px}
@media screen and (min-width:40em){
  .grid-x.grid-margin-x{margin-left:-12px;margin-right:-12px}
  .grid-x.grid-margin-x>.cell{width:calc(100% - 24px);margin-left:12px;margin-right:12px}
}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:60;background:var(--surface);border-bottom:1px solid var(--line);transition:box-shadow .25s ease}
.site-header.is-scrolled{box-shadow:0 10px 30px -24px rgba(22,32,47,.45)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}
.logo{font-size:19px;font-weight:700;color:var(--brand-700);white-space:nowrap}
.logo:hover{color:var(--brand-600)}
.logo .logo-mark{display:inline-block;width:8px;height:8px;border-radius:2px;background:var(--accent-600);margin-right:9px;vertical-align:2px}
.main-nav{display:flex;align-items:center;gap:36px}
.nav-link{position:relative;font-size:16px;font-weight:500;color:var(--ink-900);padding:6px 0;white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand-600);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
.nav-link:hover{color:var(--brand-600)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand-700)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:18px}
.nav-icon{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--line);border-radius:50%;color:var(--ink-600);transition:border-color .22s ease,color .22s ease,background .22s ease}
.nav-icon:hover{border-color:var(--brand-200);color:var(--brand-600);background:var(--brand-050)}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:var(--surface);padding:0;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink-900);margin:4px auto;transition:transform .2s ease,opacity .2s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
.mobile-panel{display:none;border-top:1px solid var(--line);background:var(--surface)}
.mobile-panel.is-open{display:block}
.mobile-panel a{display:block;padding:0 24px;line-height:56px;font-size:16px;color:var(--ink-900);border-bottom:1px solid var(--line)}
.mobile-panel a.is-active{color:var(--brand-600)}
.mobile-panel .panel-cta{padding:20px 24px;border-bottom:0}

/* 按钮体系 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;line-height:1;border:1.5px solid transparent;cursor:pointer;transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease,box-shadow .22s ease}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px)}
.btn-ghost{border-color:var(--brand-200);color:var(--brand-700);background:transparent}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-700)}
.btn-link{display:inline-flex;align-items:center;gap:8px;padding:0;min-height:auto;border:0;background:none;color:var(--brand-600);font-size:15px;font-weight:600;cursor:pointer}
.btn-link .arrow{transition:transform .22s ease}
.btn-link:hover{color:var(--brand-700)}
.btn-link:hover .arrow{transform:translateX(4px)}

/* 徽章与标签 */
.badge{display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;font-size:13px;font-weight:600;background:var(--accent-050);color:var(--accent-600)}
.badge-soft{background:var(--brand-050);color:var(--brand-700)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
.tag{display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:13px;font-weight:600;color:var(--ink-600);transition:border-color .2s ease,color .2s ease}
.tag:hover{border-color:var(--brand-200);color:var(--brand-600)}

/* 文章头部 */
.article-hero{position:relative;overflow:hidden;padding:48px 0 44px;background:linear-gradient(180deg,var(--brand-050) 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.article-hero::after{content:"";position:absolute;inset:0;background-image:url("/assets/images/backpic/back-3.png");background-size:cover;background-position:center;opacity:.06;pointer-events:none}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-400);margin-bottom:22px}
.breadcrumb a{color:var(--ink-400)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .current{color:var(--ink-900)}
.article-title{font-size:40px;font-weight:700;line-height:1.3;max-width:900px}
.article-lede{margin-top:18px;max-width:780px;color:var(--ink-600)}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:26px;font-size:14px;color:var(--ink-400)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.article-meta time{color:var(--ink-400)}

/* 文章布局 */
.article-layout{padding:64px 0 96px}
.article-main{min-width:0}
.article-side{min-width:0}
.article-body{font-size:17px;line-height:1.9;color:var(--ink-900);max-width:840px}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em}
.article-body h2{font-size:24px;font-weight:650;line-height:1.4;margin:2.2em 0 .9em;padding-left:14px;border-left:4px solid var(--brand-600)}
.article-body h3{font-size:20px;font-weight:600;margin:1.7em 0 .6em}
.article-body h4{font-size:17px;font-weight:600;margin:1.4em 0 .5em}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:0}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.55em}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;background:var(--brand-200);border-radius:1px}
.article-body ol{counter-reset:olc}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:.55em;counter-increment:olc}
.article-body ol li::before{content:counter(olc);position:absolute;left:0;top:.28em;width:20px;height:20px;border-radius:6px;background:var(--accent-050);color:var(--accent-600);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}
.article-body blockquote{margin:1.6em 0;padding:20px 24px;background:var(--brand-050);border-left:3px solid var(--brand-600);border-radius:0 var(--r-img) var(--r-img) 0;color:var(--ink-600)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:1.6em 0}
.article-body figure{margin:1.8em 0}
.article-body figcaption{margin-top:10px;font-size:14px;line-height:1.7;color:var(--ink-400);text-align:center}
.article-body a{border-bottom:1px solid var(--brand-200)}
.article-body a:hover{border-bottom-color:var(--brand-600)}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15.5px}
.article-body th,.article-body td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
.article-body th{font-weight:600;color:var(--brand-700);background:var(--brand-050);border-bottom-color:var(--brand-200)}
.article-body code{background:var(--bg-alt);border:1px solid var(--line);border-radius:6px;padding:2px 6px;font-size:14.5px;font-family:var(--font-lat)}
.article-body pre{background:var(--brand-700);color:#EAF1FB;padding:20px;border-radius:var(--r-img);overflow-x:auto;margin:1.6em 0}
.article-body pre code{background:none;border:0;color:inherit;padding:0}
.article-body hr{border:0;height:1px;background:var(--line);margin:2.2em 0}

.article-empty{max-width:640px;margin:0 auto;text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);padding:56px 28px}
.article-empty svg{width:52px;height:52px;stroke:var(--brand-200);margin:0 auto 18px}
.article-empty .empty-title{font-size:20px;font-weight:600;margin-bottom:10px}
.article-empty .empty-text{color:var(--ink-600);margin-bottom:24px}

/* 侧栏 */
.side-sticky{position:sticky;top:96px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);padding:24px;margin-bottom:24px}
.side-card h3{font-size:17px;font-weight:600;margin-bottom:14px}
.side-card p{color:var(--ink-600);font-size:15px}
.side-list{counter-reset:sidec}
.side-list li{position:relative;padding:12px 0 12px 30px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink-600)}
.side-list li:last-child{border-bottom:0;padding-bottom:0}
.side-list li::before{counter-increment:sidec;content:counter(sidec,decimal-leading-zero);position:absolute;left:0;top:13px;font-family:var(--font-lat);font-size:13px;font-weight:700;color:var(--accent-600)}
.side-list a{color:var(--ink-900)}
.side-list a:hover{color:var(--brand-600)}
.side-meta{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:var(--ink-400);padding:10px 0;border-bottom:1px solid var(--line)}
.side-meta:last-of-type{border-bottom:0}
.side-card .btn{width:100%;margin-top:16px}

/* 文末 */
.article-foot{margin-top:56px;max-width:840px}
.foot-block{padding-top:28px;border-top:1px solid var(--line);margin-top:28px}
.foot-block h3{font-size:17px;font-weight:600;margin-bottom:16px}
.back-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

/* 相关推荐 */
.related{padding:56px 0 96px;background:var(--bg-alt);border-top:1px solid var(--line)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);overflow:hidden;height:100%;display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--brand-200)}
.card-media{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--bg-alt)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:20px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{color:var(--ink-600);font-size:15px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:14px;color:var(--ink-400)}
.card-foot .dot-sep{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--line);margin-right:8px;vertical-align:1px}

/* FAQ */
.faq-wrap{max-width:900px}
.accordion{border:0;background:transparent;margin:0}
.accordion .accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
.accordion .accordion-title{position:relative;padding:22px 44px 22px 18px;font-size:17px;font-weight:600;color:var(--ink-900);border:0;background:transparent;transition:color .2s ease}
.accordion .accordion-title::before{content:"";position:absolute;left:0;top:26px;width:3px;height:20px;background:var(--brand-600);transform:scaleY(0);transform-origin:top;transition:transform .25s ease}
.accordion .accordion-item.is-active .accordion-title::before{transform:scaleY(1)}
.accordion .accordion-title:hover{color:var(--brand-600);background:transparent}
.accordion .accordion-title::after{right:16px;color:var(--brand-600)}
.accordion .accordion-content{padding:0 18px 24px;border:0;background:transparent;color:var(--ink-600);line-height:1.85}
.accordion .accordion-content p:last-child{margin-bottom:0}

/* CTA */
.cta-band{padding:0 0 96px}
.cta-card{background:var(--brand-050);border:1px solid var(--brand-200);border-radius:var(--r-card);padding:36px}
.cta-inner{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);padding:32px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.cta-inner h2{font-size:24px;font-weight:650;margin-bottom:8px}
.cta-inner p{color:var(--ink-600)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex-shrink:0}

/* 表单 */
.field-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.field-row input[type="email"]{flex:1 1 260px;min-height:46px;padding:0 16px;border:1px solid var(--line);border-radius:var(--r-btn);background:var(--surface);color:var(--ink-900);transition:border-color .2s ease,box-shadow .2s ease}
.field-row input[type="email"]::placeholder{color:var(--ink-400)}
.field-row input[type="email"]:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(45,91,168,.14)}
.form-hint{margin-top:12px;font-size:14px;color:var(--ink-400)}

/* 页脚 */
.site-footer{background:var(--brand-700);color:#D7E2F3;padding:72px 0 32px;position:relative;overflow:hidden}
.site-footer::before{content:"";position:absolute;inset:0;background-image:url("/assets/images/backpic/back-2.webp");background-size:cover;opacity:.05;pointer-events:none}
.site-footer .container{position:relative;z-index:1}
.foot-grid{padding-bottom:44px}
.foot-brand .f-logo{font-size:19px;font-weight:700;color:#fff;display:inline-block;margin-bottom:16px}
.foot-brand p{color:#B9CAE6;font-size:15px;max-width:340px}
.foot-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.foot-col ul li{margin-bottom:10px}
.foot-col a{color:#B9CAE6;font-size:15px}
.foot-col a:hover{color:#fff}
.foot-col p{color:#B9CAE6;font-size:15px;margin-bottom:8px}
.foot-sep{height:1px;background:rgba(255,255,255,.16)}
.foot-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding-top:24px;font-size:14px;color:#A8BDDD}
.foot-bottom .domain{font-family:var(--font-lat);letter-spacing:.02em;color:#8FA8CE}

/* 响应式 */
@media screen and (max-width:1023px){
  .article-side{margin-top:44px}
  .side-sticky{position:static}
  .section{padding:72px 0}
  .cta-inner{flex-direction:column;align-items:flex-start}
}
@media screen and (max-width:900px){
  .main-nav{display:none}
  .nav-toggle{display:block}
  .nav-actions{display:none}
}
@media screen and (max-width:768px){
  body{font-size:16px}
  .container{padding-left:18px;padding-right:18px}
  .grid-x.grid-margin-x{margin-left:-9px;margin-right:-9px}
  .grid-x.grid-margin-x>.cell{width:calc(100% - 18px);margin-left:9px;margin-right:9px}
  .section{padding:56px 0}
  .article-hero{padding:32px 0 30px}
  .article-title{font-size:28px}
  .article-layout{padding:40px 0 64px}
  .article-body{font-size:17px}
  .article-body h2{font-size:21px}
  .cta-band{padding-bottom:56px}
  .cta-card{padding:22px}
  .cta-inner{padding:24px}
  .related{padding:44px 0 56px}
  .side-card{padding:20px}
  .btn{width:100%}
  .back-row .btn,.cta-actions .btn,.field-row .btn{width:100%}
  .btn-link{width:auto}
}
@media screen and (max-width:480px){
  .header-inner{min-height:64px}
  .logo{font-size:17px}
  .article-title{font-size:26px}
  .card-body{padding:20px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category2 */
:root{
  --brand-700:#1B3A6B;
  --brand-600:#2D5BA8;
  --brand-200:#C9DAF2;
  --brand-050:#F2F6FC;
  --accent-600:#C4692A;
  --accent-050:#FBF0E6;
  --ink-900:#16202F;
  --ink-600:#55657C;
  --ink-400:#8A97A8;
  --surface:#FFFFFF;
  --bg:#FBFCFE;
  --bg-alt:#F5F8FC;
  --line:#E4E9F1;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --sh-card:0 1px 2px rgba(22,32,47,.05),0 14px 30px -20px rgba(22,32,47,.20);
  --sh-hover:0 24px 44px -26px rgba(22,32,47,.28);
  --fc:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --fl:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--fc);
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-900);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block;border:0}
h1,h2,h3,h4{margin:0 0 16px;color:var(--ink-900);letter-spacing:0;font-family:var(--fc)}
h1{font-size:40px;line-height:1.3;font-weight:700}
h2{font-size:30px;line-height:1.35;font-weight:650}
h3{font-size:20px;line-height:1.5;font-weight:600}
h4{font-size:16px;line-height:1.6;font-weight:600}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--brand-600);text-decoration:none;transition:color .25s ease}
a:hover{color:var(--brand-700)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}
button{font-family:inherit}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.grid-x.gutter{margin-left:-12px;margin-right:-12px;row-gap:24px}
.grid-x.gutter > .cell{padding-left:12px;padding-right:12px}
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin:0 0 48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{margin-bottom:14px}
.section-sub{color:var(--ink-600);font-size:16.5px;margin:0}
.eyebrow{
  display:inline-block;
  font-family:var(--fl);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--accent-600);
  font-weight:600;
  margin-bottom:14px;
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:0 26px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  border-radius:var(--r-btn);
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background-color .25s ease,color .25s ease,border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.btn-primary{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:var(--brand-200)}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-200)}
.btn-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--brand-700);
}
.btn-link .arrow{font-family:var(--fl);transition:transform .25s ease}
.btn-link:hover .arrow{transform:translateX(4px)}

/* 徽章与标签 */
.badge{
  display:inline-block;
  padding:4px 12px;
  font-size:13px;
  font-weight:600;
  line-height:1.6;
  border-radius:999px;
  background:var(--accent-050);
  color:var(--accent-600);
}
.tag{
  display:inline-block;
  padding:6px 14px;
  font-size:13px;
  font-weight:600;
  line-height:1.5;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--line);
  color:var(--ink-600);
}

/* 头部导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 26px -22px rgba(22,32,47,.55)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:76px}
.logo{
  font-size:20px;
  font-weight:700;
  color:var(--brand-700);
  white-space:nowrap;
}
.logo:hover{color:var(--brand-600)}
.nav-wrap{display:flex;align-items:center;gap:28px}
.main-nav{display:flex;align-items:center;gap:36px}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 0;
  font-size:16px;
  font-weight:500;
  color:var(--ink-900);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:2px;
  background:var(--brand-600);
  transition:width .25s ease;
}
.nav-link:hover{color:var(--brand-600)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand-700)}
.nav-link.is-active::after{width:100%}
.nav-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border-radius:50%;
  border:1px solid var(--line);
  color:var(--brand-700);
  font-size:15px;
  transition:border-color .25s ease,background-color .25s ease,color .25s ease;
}
.nav-icon:hover{border-color:var(--brand-200);background:var(--brand-050);color:var(--brand-700)}
.nav-toggle{
  display:none;
  width:46px;
  height:46px;
  border:0;
  background:transparent;
  padding:0;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{display:block;width:22px;height:1.5px;background:var(--ink-900);transition:transform .25s ease,opacity .25s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.mobile-panel{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:8px 0 20px;
}
.mobile-panel.is-open{display:block}
.mobile-panel a.m-panel-link{
  display:block;
  padding:0 24px;
  line-height:56px;
  font-size:16px;
  font-weight:500;
  color:var(--ink-900);
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.mobile-panel a.m-panel-link:hover,.mobile-panel a.m-panel-link.is-active{color:var(--brand-600)}
.mobile-panel .m-panel-cta{margin:18px 24px 0;width:calc(100% - 48px)}

/* 面包屑 */
.breadcrumb{
  font-size:14px;
  line-height:1.7;
  color:var(--ink-400);
  margin-bottom:26px;
}
.breadcrumb a{color:var(--ink-400)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{margin:0 8px;color:var(--line)}
.breadcrumb .current{color:var(--ink-900)}

/* 首屏 */
.page-hero{
  position:relative;
  overflow:hidden;
  background:#fff;
  border-bottom:1px solid var(--line);
  padding:64px 0 72px;
}
.hero-texture{
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(135deg,rgba(27,58,107,.06),rgba(251,240,230,.30)),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover,cover;
  background-position:center,center;
  opacity:.85;
}
.hero-texture::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(to right,rgba(27,58,107,.16) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(27,58,107,.16) 1px,transparent 1px);
  background-size:44px 44px;
  opacity:.16;
}
.page-hero .container{position:relative;z-index:2}
.hero-inner{max-width:820px;margin:0 auto;text-align:center}
.hero-inner h1{
  margin-bottom:20px;
  color:var(--brand-700);
}
.hero-sub{
  font-size:18px;
  line-height:1.8;
  color:var(--ink-600);
  margin:0 auto 26px;
  max-width:640px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hero-tags .tag{background:rgba(255,255,255,.86)}

/* 标签页 */
.tabs{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:0 0 40px;
  padding:0;
  border:0;
  background:transparent;
}
.tabs::before,.tabs::after{display:none}
.tabs .tabs-title{float:none;flex:0 0 auto}
.tabs .tabs-title > a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 22px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  border-radius:999px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink-600);
  transition:background-color .25s ease,color .25s ease,border-color .25s ease;
}
.tabs .tabs-title > a:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-200)}
.tabs .tabs-title.is-active > a,
.tabs .tabs-title > a[aria-selected="true"]{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.tabs-content{
  margin:0;
  border:0;
  background:transparent;
  transition:none;
}
.tabs-panel{padding:0;background:transparent}
.tabs-panel[aria-hidden="true"]{display:none}
.tabs-panel.is-active{display:block}

/* 信息卡片 */
.info-card{
  display:flex;
  flex-direction:column;
  height:100%;
  padding:20px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.info-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--sh-hover);
  border-color:var(--brand-200);
}
.card-media{
  display:block;
  overflow:hidden;
  border-radius:var(--r-img);
  background:var(--bg-alt);
  margin-bottom:20px;
}
.card-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .35s ease;
}
.info-card:hover .card-media img{transform:scale(1.03)}
.card-body{display:flex;flex-direction:column;flex:1}
.card-body .badge{align-self:flex-start;margin-bottom:14px}
.card-title{font-size:19px;line-height:1.5;font-weight:600;margin:0 0 12px}
.card-title a{color:var(--ink-900)}
.card-title a:hover{color:var(--brand-600)}
.card-desc{
  font-size:15.5px;
  line-height:1.8;
  color:var(--ink-600);
  margin:0 0 20px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.card-foot .meta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ink-400);
}
.card-foot .meta::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--accent-600);
  display:inline-block;
}
.card-foot .card-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-600);
}
.card-foot .card-link .arrow{font-family:var(--fl);transition:transform .25s ease}
.card-foot .card-link:hover .arrow{transform:translateX(4px)}

/* 流程带 */
.steps{
  position:relative;
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:20px;
  margin-top:8px;
}
.steps::before{
  content:"";
  position:absolute;
  top:19px;
  left:10%;
  right:10%;
  height:1px;
  background:var(--line);
}
.step{position:relative;z-index:1;text-align:center;padding:0 6px}
.step-dot{
  width:38px;
  height:38px;
  margin:0 auto 18px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:#fff;
  border:1px solid var(--brand-200);
  color:var(--accent-600);
  font-family:var(--fl);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:15px;line-height:1.8;color:var(--ink-600);margin:0}

/* 参数要点清单 */
.spec-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 48px;
  border-top:1px solid var(--line);
}
.spec-item{
  padding:26px 0 26px 22px;
  border-bottom:1px solid var(--line);
  position:relative;
}
.spec-item::before{
  content:"";
  position:absolute;
  left:0;
  top:30px;
  width:3px;
  height:18px;
  background:var(--accent-600);
  border-radius:2px;
}
.spec-item h3{
  font-size:17px;
  margin:0 0 8px;
}
.spec-item p{
  font-size:15.5px;
  line-height:1.8;
  color:var(--ink-600);
  margin:0;
}

/* 问答 */
.faq-grid{row-gap:20px}
.faq-item{
  height:100%;
  padding:24px 26px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item:hover{border-color:var(--brand-200);box-shadow:var(--sh-hover)}
.faq-q{
  display:flex;
  gap:12px;
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  color:var(--ink-900);
  margin:0 0 12px;
}
.faq-index{
  flex:0 0 auto;
  font-family:var(--fl);
  font-size:14px;
  font-weight:700;
  color:var(--accent-600);
  line-height:1.9;
}
.faq-a{
  font-size:15.5px;
  line-height:1.85;
  color:var(--ink-600);
  margin:0;
  padding-left:30px;
}

/* CTA */
.cta-band{padding:96px 0}
.cta-card{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  padding:40px 44px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
}
.cta-text h2{font-size:26px;margin-bottom:10px}
.cta-text p{color:var(--ink-600);margin:0;max-width:620px}
.cta-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;flex:0 0 auto}

/* 页脚 */
.site-footer{
  background:var(--brand-700);
  color:rgba(255,255,255,.78);
  padding:72px 0 28px;
  font-size:15px;
}
.site-footer h4{
  color:#fff;
  font-size:16px;
  margin:0 0 18px;
  letter-spacing:0;
}
.site-footer a{color:rgba(255,255,255,.80)}
.site-footer a:hover{color:var(--brand-200)}
.foot-grid{row-gap:36px}
.f-logo{
  display:inline-block;
  font-size:19px;
  font-weight:700;
  color:#fff;
  margin-bottom:14px;
}
.f-logo:hover{color:var(--brand-200)}
.foot-brand p{margin:0;line-height:1.8;max-width:360px}
.foot-col ul li{margin-bottom:10px;line-height:1.7}
.foot-col p{line-height:1.8;margin-bottom:10px}
.foot-sep{height:1px;background:rgba(201,218,242,.22);margin:44px 0 22px}
.foot-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:14px;
  color:rgba(255,255,255,.62);
}
.foot-bottom p{margin:0}
.foot-bottom .domain{font-family:var(--fl);letter-spacing:.03em}

/* Foundation 默认观感覆盖 */
a{color:var(--brand-600)}
a:hover{color:var(--brand-700)}
.reveal{outline:none}
.tabs-title>a:focus{outline:2px solid var(--brand-600);outline-offset:2px}
input[type="text"],input[type="email"]{
  height:46px;
  border-radius:var(--r-btn);
  border:1px solid var(--line);
  box-shadow:none;
  color:var(--ink-900);
  font-size:15px;
}
input[type="text"]:focus,input[type="email"]:focus{
  border-color:var(--brand-600);
  box-shadow:0 0 0 3px rgba(45,91,168,.14);
  outline:none;
}

/* 响应式 */
@media (max-width:1024px){
  .main-nav{gap:24px}
  .nav-link{font-size:15px}
  .section{padding:76px 0}
  .cta-band{padding:76px 0}
  .steps{grid-template-columns:repeat(3,1fr);row-gap:32px}
  .steps::before{display:none}
  .spec-grid{grid-template-columns:1fr;gap:0}
}
@media (max-width:768px){
  body{font-size:16px}
  h1{font-size:28px;line-height:1.35}
  h2{font-size:24px}
  h3{font-size:18px}
  .container{padding:0 18px}
  .section{padding:56px 0}
  .cta-band{padding:56px 0}
  .main-nav{display:none}
  .nav-icon{display:none}
  .nav-toggle{display:flex}
  .header-inner{min-height:64px}
  .logo{font-size:18px;white-space:normal;line-height:1.4}
  .page-hero{padding:36px 0 48px}
  .hero-sub{font-size:16.5px}
  .section-head{margin-bottom:32px}
  .steps{grid-template-columns:1fr;row-gap:0}
  .step{
    text-align:left;
    display:grid;
    grid-template-columns:38px 1fr;
    column-gap:16px;
    padding:0 0 28px;
  }
  .step-dot{margin:0}
  .step-body{padding-top:2px}
  .step h3{margin-bottom:6px}
  .cta-card{flex-direction:column;align-items:flex-start;padding:28px 22px;gap:24px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .tabs .tabs-title > a{padding:0 16px;font-size:14px}
  .faq-a{padding-left:0}
}
@media (max-width:520px){
  .hero-tags{gap:8px}
  .hero-tags .tag{font-size:12.5px;padding:5px 11px}
  .card-desc{-webkit-line-clamp:3}
  .btn{min-height:46px;padding:0 20px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
}