/* roulang page: index */
/* ========== 设计变量 ========== */
:root{
  --brand:#2E6BF0;
  --brand-deep:#1B4FD1;
  --brand-link:#7FA7FF;
  --brand-soft:#EAF1FE;
  --accent:#FF7A33;
  --accent-soft:#FFF0E6;
  --ink:#121A2B;
  --ink-2:#5A6884;
  --line:#E5ECF6;
  --bg:#F6F9FD;
  --surface:#FFFFFF;
  --footer:#101A2E;
  --r-card:18px;
  --r-img:16px;
  --r-btn:12px;
  --r-pill:999px;
  --sh-1:0 2px 4px rgba(18,26,43,.04),0 12px 28px rgba(18,26,43,.06);
  --sh-2:0 18px 40px rgba(18,26,43,.10);
  --c:1200px;
  --c-wide:1320px;
}

/* ========== 基础重置 ========== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-deep)}
button{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:6px;
}

.wrap{width:100%;max-width:var(--c);margin:0 auto;padding:0 24px}
.wrap-wide{max-width:var(--c-wide)}

/* ========== 站点头部 ========== */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(18,26,43,.04);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(18,26,43,.08)}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:72px;transition:height .25s ease;
}
.site-header.is-scrolled .nav-inner{height:64px}

.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:42px;height:42px;border-radius:12px;background:var(--brand);
  color:#fff;display:grid;place-items:center;font-weight:800;font-size:17px;
  letter-spacing:-.5px;flex-shrink:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:17px;font-weight:800;color:var(--ink);white-space:nowrap}
.brand-sub{font-size:12px;font-weight:500;color:var(--ink-2);white-space:nowrap}

.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  position:relative;display:block;padding:10px 14px;
  font-size:15px;font-weight:600;color:var(--ink);border-radius:10px;
}
.nav-links a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--brand);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after,
.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--brand)}

.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink);display:grid;place-items:center;font-size:20px;
  cursor:pointer;transition:all .22s ease;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}

.mobile-nav{padding:8px 24px 24px;border-top:1px solid var(--line);background:#fff}
.mobile-nav .btn-x{width:100%;margin-bottom:14px}
.nav-links-mobile{display:flex;flex-direction:column;gap:4px}
.nav-links-mobile a{
  display:block;padding:13px 14px;border-radius:12px;
  font-size:15px;font-weight:600;color:var(--ink);
}
.nav-links-mobile a:hover{background:var(--brand-soft);color:var(--brand)}
.nav-links-mobile a.active{background:var(--brand-soft);color:var(--brand)}

/* ========== 按钮 ========== */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;line-height:1;padding:14px 24px;
  border-radius:var(--r-btn);border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease;
  text-align:center;white-space:nowrap;
}
.btn-x-solid{
  background:var(--brand);color:#fff;border-radius:var(--r-pill);
  box-shadow:0 6px 16px rgba(46,107,240,.22);
}
.btn-x-solid:hover{
  background:var(--brand-deep);color:#fff;transform:translateY(-2px);
  box-shadow:0 14px 28px rgba(46,107,240,.28);
}
.btn-x-ghost{
  background:#fff;color:var(--ink);border-color:var(--line);
}
.btn-x-ghost:hover{
  background:var(--brand-soft);border-color:var(--brand);color:var(--brand);
  transform:translateY(-2px);
}
.btn-x-lg{padding:16px 32px;font-size:16px}

.arrow-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:auto;
  font-size:14px;font-weight:700;color:var(--brand);
  transition:gap .2s ease,color .2s ease;
}
.arrow-link:hover{gap:11px;color:var(--brand-deep)}

/* ========== 徽章 ========== */
.badge-x{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;line-height:1.6;
  background:var(--brand-soft);color:var(--brand);
}
.badge-x-accent{background:var(--accent-soft);color:#C15115}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-deep);
  font-size:13px;font-weight:700;letter-spacing:.4px;
}

/* ========== 首屏 ========== */
.hero{
  position:relative;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center right;
  background-repeat:no-repeat;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,#FFFFFF 0%,rgba(255,255,255,.95) 34%,rgba(255,255,255,.68) 60%,rgba(255,255,255,.30) 100%);
}
.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,360px);
  gap:56px;align-items:center;
  min-height:600px;padding:80px 0;
}
.hero-copy{max-width:640px}
.hero-copy h1{
  font-size:clamp(30px,4vw,48px);
  font-weight:800;line-height:1.24;letter-spacing:-.5px;
  margin:20px 0 18px;color:var(--ink);
}
.hero-copy .lede{
  font-size:17px;line-height:1.85;color:var(--ink-2);
  max-width:580px;margin-bottom:28px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 26px}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:500;color:var(--ink-2)}
.hero-points i{color:var(--brand);font-size:15px}

.hero-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:26px 24px;justify-self:end;width:100%;
}
.hero-card-title{
  font-size:14px;font-weight:700;color:var(--ink);
  padding-bottom:14px;margin-bottom:16px;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:8px;
}
.hero-card-title i{color:var(--brand)}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;text-align:center}
.metric-num{
  font-size:26px;font-weight:800;color:var(--accent);line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.metric-label{font-size:12px;color:var(--ink-2);margin-top:4px;line-height:1.5}

/* ========== 数据条 ========== */
.stats-bar{background:#fff;border-bottom:1px solid var(--line);padding:34px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{
  text-align:center;padding:0 18px;
  border-left:1px solid var(--line);
}
.stat:first-child{border-left:0}
.stat-num{
  font-size:38px;font-weight:800;line-height:1.1;color:var(--brand);
  font-variant-numeric:tabular-nums;
}
.stat-num em{font-style:normal;font-size:17px;font-weight:700;margin-left:2px;color:var(--ink-2)}
.stat-label{font-size:14px;color:var(--ink-2);margin-top:8px}

/* ========== 板块通用 ========== */
.section{padding:96px 0}
.section-white{background:#fff}
.section-soft{background:var(--brand-soft)}
.section-head{max-width:720px;margin-bottom:52px}
.section-head h2{
  font-size:clamp(26px,2.7vw,34px);font-weight:700;line-height:1.35;
  margin:16px 0 14px;color:var(--ink);
}
.section-head p{font-size:16px;color:var(--ink-2);line-height:1.85}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ========== 玩法介绍 ========== */
.play-row{display:grid;gap:52px;align-items:center;margin-bottom:80px}
.play-row:last-child{margin-bottom:0}
.play-row.a{grid-template-columns:7fr 5fr}
.play-row.b{grid-template-columns:5fr 7fr}
.play-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-img);box-shadow:var(--sh-1);
}
.play-text h3{font-size:22px;font-weight:700;line-height:1.45;margin:14px 0 14px}
.play-text p{font-size:16px;color:var(--ink-2);line-height:1.85;margin-bottom:16px}
.play-list{display:flex;flex-direction:column;gap:10px}
.play-list li{display:flex;align-items:flex-start;gap:9px;font-size:15px;color:var(--ink-2)}
.play-list i{color:var(--brand);font-size:15px;margin-top:6px}
.num-tag{
  display:inline-grid;place-items:center;width:26px;height:26px;border-radius:9px;
  background:var(--accent-soft);color:var(--accent);
  font-size:13px;font-weight:800;flex-shrink:0;
}

/* ========== 内容板块预览（非等高网格） ========== */
.reward-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.rw-7{grid-column:span 7}
.rw-5{grid-column:span 5}
.rw-6{grid-column:span 6}

.rw-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;height:100%;
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.rw-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D6E2F8}
.rw-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.rw-card.tall img{aspect-ratio:16/9}
.rw-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:11px;flex:1}
.rw-body h3{font-size:19px;font-weight:700;line-height:1.5;color:var(--ink)}
.rw-body p{font-size:15px;color:var(--ink-2);line-height:1.8}
@media(min-width:992px){
  .rw-6.offset-lift{margin-top:24px}
}

/* ========== 任务进度 ========== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);margin:10px 0 40px}
.step{position:relative;text-align:center;padding:0 12px}
.step::before{
  content:"";position:absolute;top:16px;left:0;right:0;height:2px;
  background:var(--line);z-index:0;
}
.step:first-child::before{left:50%}
.step:last-child::before{right:50%}
.step-dot{
  position:relative;z-index:1;
  width:32px;height:32px;border-radius:50%;
  display:grid;place-items:center;margin:0 auto 14px;
  background:#fff;border:2px solid var(--line);
  font-size:13px;font-weight:800;color:var(--ink-2);
  font-variant-numeric:tabular-nums;
}
.step.done .step-dot{background:var(--brand);border-color:var(--brand);color:#fff}
.step.active .step-dot{border-color:var(--brand);color:var(--brand);box-shadow:0 0 0 4px var(--brand-soft)}
.step-text h3{font-size:18px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.step-text p{font-size:14px;color:var(--ink-2);line-height:1.75}
.step-head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-bottom:12px;flex-wrap:wrap;
}
.step-head h3{font-size:19px;font-weight:700}
.step-head .percent{font-size:15px;font-weight:800;color:var(--accent)}
.progress-x{height:10px;border-radius:var(--r-pill);background:var(--brand-soft);overflow:hidden}
.progress-x > span{
  display:block;height:100%;width:75%;border-radius:var(--r-pill);
  background:var(--brand);
}

/* ========== 最新信息（CMS） ========== */
.news-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  flex-wrap:wrap;margin-bottom:48px;
}
.news-head .section-head{margin-bottom:0}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D6E2F8}
.news-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:11px;flex:1}
.news-title{
  font-size:17px;font-weight:700;line-height:1.55;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .22s ease;
}
.news-card:hover .news-title{color:var(--brand)}
.news-desc{
  font-size:14px;color:var(--ink-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-2);
}
.news-meta span{display:inline-flex;align-items:center;gap:6px}
.news-meta i{color:var(--brand);font-size:13px}

.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;
}
.empty-icon{
  width:60px;height:60px;border-radius:18px;background:var(--brand-soft);
  color:var(--brand);display:grid;place-items:center;font-size:26px;
  margin:0 auto 18px;
}
.empty-state p{font-size:16px;color:var(--ink-2);margin-bottom:20px}

/* ========== FAQ ========== */
.faq-wrap{max-width:900px;margin:0 auto}
.faq-acc .accordion-item{
  background:#fff;border:0;border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-1);
}
.faq-acc .accordion-header{margin:0}
.faq-acc .accordion-button{
  background:#fff;border:0;border-radius:var(--r-card) !important;
  padding:22px 26px;font-size:16px;font-weight:700;color:var(--ink);
  line-height:1.6;box-shadow:none !important;
}
.faq-acc .accordion-button:not(.collapsed){color:var(--brand)}
.faq-acc .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-4px}
.faq-acc .accordion-button::after{
  content:"";width:9px;height:9px;flex-shrink:0;margin-left:18px;
  border-right:2px solid var(--ink-2);border-bottom:2px solid var(--ink-2);
  transform:rotate(45deg);transition:transform .25s ease,border-color .25s ease;
  background-image:none;
}
.faq-acc .accordion-button:not(.collapsed)::after{
  transform:rotate(-135deg);border-color:var(--brand);
}
.faq-acc .accordion-body{
  position:relative;padding:0 26px 24px 26px;
  font-size:15px;line-height:1.85;color:var(--ink-2);
}
.faq-acc .accordion-body::before{
  content:"";position:absolute;left:8px;top:4px;bottom:28px;width:3px;
  border-radius:3px;background:var(--brand);
}
.faq-acc .accordion-body{padding-left:26px}

/* ========== 底部 CTA ========== */
.cta-band{background:var(--brand-soft);padding:84px 0}
.cta-band .wrap{text-align:center}
.cta-band h2{
  font-size:clamp(24px,2.6vw,32px);font-weight:700;line-height:1.4;
  margin-bottom:14px;color:var(--ink);
}
.cta-band p{font-size:16px;color:var(--ink-2);margin-bottom:30px}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* ========== 页脚 ========== */
.site-footer{background:var(--footer);color:#C7D0E0;padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:44px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{background:var(--brand)}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-sub{color:#8B99B3}
.footer-col p{font-size:14px;line-height:1.85;color:#9AA7BE}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin:0 0 18px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col ul a{font-size:14px;color:#C7D0E0}
.footer-col ul a:hover{color:var(--brand-link)}
.footer-col ul li span{font-size:14px;color:#9AA7BE;line-height:1.8}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 26px;
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8B99B3;
}
.footer-bottom a{color:#8B99B3}
.footer-bottom a:hover{color:var(--brand-link)}

/* ========== 响应式 ========== */
@media (max-width:1199px){
  .hero-inner{grid-template-columns:minmax(0,1fr) minmax(0,320px);gap:40px}
  .play-row{gap:40px}
}
@media (max-width:991px){
  .section{padding:72px 0}
  .hero::before{background:linear-gradient(180deg,#FFFFFF 0%,rgba(255,255,255,.95) 46%,rgba(255,255,255,.86) 100%)}
  .hero-inner{grid-template-columns:1fr;gap:34px;min-height:auto;padding:64px 0}
  .hero-card{justify-self:stretch;max-width:520px}
  .play-row.a,.play-row.b{grid-template-columns:1fr;gap:28px}
  .play-row{margin-bottom:60px}
  .rw-7,.rw-5,.rw-6{grid-column:span 12}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:36px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .stat:nth-child(3){border-left:0}
  .stat{padding:6px 16px}
}
@media (max-width:767px){
  body{font-size:15px}
  .wrap{padding:0 16px}
  .mobile-nav{padding:8px 16px 22px}
  .section{padding:56px 0}
  .section-head{margin-bottom:36px}
  .stats-bar{padding:26px 0}
  .stat-num{font-size:30px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn-x{width:100%}
  .steps{grid-template-columns:1fr;gap:20px;margin-bottom:30px}
  .step{
    text-align:left;padding:0;
    display:grid;grid-template-columns:32px 1fr;gap:14px;align-items:start;
  }
  .step::before{display:none}
  .step-dot{margin:0}
  .news-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .cta-band{padding:60px 0}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn-x{width:100%}
  .hero-points{flex-direction:column;gap:10px}
  .faq-acc .accordion-button{padding:18px 20px;font-size:15px}
  .faq-acc .accordion-body{padding:0 20px 20px 20px;font-size:14.5px}
  .rw-body{padding:20px 20px 22px}
}
@media (max-width:520px){
  .hero-copy h1{font-size:27px}
  .brand-sub{display:none}
  .rw-body h3{font-size:17px}
}

/* roulang page: article */
:root{
  --brand:#2E6BF0;
  --brand-deep:#1B4FD1;
  --brand-soft:#EAF1FE;
  --accent:#FF7A33;
  --accent-soft:#FFF0E6;
  --ink:#121A2B;
  --ink-2:#5A6884;
  --line:#E5ECF6;
  --bg:#F6F9FD;
  --surface:#FFFFFF;
  --footer:#101A2E;
  --radius-card:18px;
  --radius-img:16px;
  --radius-btn:12px;
  --shadow:0 2px 4px rgba(18,26,43,.04),0 12px 28px rgba(18,26,43,.06);
  --shadow-hover:0 18px 40px rgba(18,26,43,.10);
  --ff:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --ff-num:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--ff);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-deep);}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(46,107,240,.18);
  border-radius:var(--radius-btn);
}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;line-height:1.35;}
p{margin:0 0 1.1em;}
ul{margin:0;padding:0;list-style:none;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:72px 0;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(18,26,43,.04);
  transition:box-shadow .25s ease,height .25s ease;
}
.site-header.scrolled{box-shadow:0 6px 20px rgba(18,26,43,.08);}
.header-inner{display:flex;align-items:center;gap:28px;height:72px;transition:height .25s ease;}
.site-header.scrolled .header-inner{height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;letter-spacing:.5px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:16px;font-weight:800;color:var(--ink);}
.brand-sub{font-size:12px;color:var(--ink-2);letter-spacing:.5px;}
nav.d-none{flex:1 1 auto;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{
  position:relative;
  font-size:15px;
  font-weight:600;
  color:var(--ink);
  padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--brand);transition:width .25s ease;
}
.nav-links a:hover::after,.nav-links a.active::after{width:100%;}
.nav-links a:hover,.nav-links a.active{color:var(--brand);}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto;}
.btn-cta{
  display:inline-flex;align-items:center;gap:8px;
  height:44px;padding:0 22px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:15px;font-weight:700;
  border:none;white-space:nowrap;
  box-shadow:0 2px 4px rgba(18,26,43,.04),0 12px 28px rgba(18,26,43,.06);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-cta:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.nav-toggle{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink);font-size:18px;
  display:inline-flex;align-items:center;justify-content:center;
}
.mobile-panel{
  border-top:1px solid var(--line);
  background:var(--surface);
  padding:16px 24px 22px;
  display:none;
}
.mobile-panel.open{display:block;}
.mobile-panel .btn-cta{width:100%;justify-content:center;margin-bottom:14px;}
.mobile-panel ul{display:flex;flex-direction:column;gap:2px;}
.mobile-panel ul a{
  display:block;padding:12px 4px;font-size:15px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mobile-panel ul a:hover{color:var(--brand);}

/* ---------- 面包屑 ---------- */
.crumb-bar{background:var(--surface);border-bottom:1px solid var(--line);}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);padding:14px 0;}
.crumb a{color:var(--brand);font-weight:600;}
.crumb span.sep{color:#B9C4D8;}
.crumb .current{color:var(--ink-2);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- 文章头 ---------- */
.article-head{
  background:linear-gradient(180deg,var(--brand-soft) 0%,rgba(234,241,254,0) 100%);
  padding:40px 0 28px;
}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);
  font-size:13px;font-weight:700;letter-spacing:.3px;
}
.article-head h1{
  font-size:clamp(28px,3.4vw,42px);
  font-weight:800;
  margin:18px 0 16px;
  max-width:900px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:20px;font-size:13px;color:var(--ink-2);}
.meta-row .meta-item{display:inline-flex;align-items:center;gap:7px;}
.meta-row i{color:var(--brand);font-size:13px;}
.lead-text{font-size:16px;color:var(--ink-2);max-width:760px;margin-top:14px;}

/* ---------- 正文布局 ---------- */
.article-layout{padding:44px 0 72px;}
.article-body{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow);
  padding:38px 40px 46px;
  max-width:760px;
  font-size:17px;
  line-height:1.85;
  color:#20293C;
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  font-size:26px;
  font-weight:700;
  margin:2em 0 .7em;
  padding-left:14px;
  border-left:4px solid var(--brand);
  scroll-margin-top:96px;
}
.article-body h3{
  font-size:20px;
  font-weight:700;
  margin:1.8em 0 .6em;
  color:var(--ink);
  scroll-margin-top:96px;
}
.article-body p{margin:0 0 1.2em;}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:0;}
.article-body ul li{
  position:relative;padding-left:22px;margin-bottom:10px;list-style:none;
}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:12px;width:8px;height:8px;
  border-radius:2px;background:var(--brand);
}
.article-body ol{counter-reset:li;padding-left:0;}
.article-body ol li{
  position:relative;padding-left:34px;margin-bottom:10px;list-style:none;counter-increment:li;
}
.article-body ol li::before{
  content:counter(li);
  position:absolute;left:0;top:3px;
  width:22px;height:22px;border-radius:8px;
  background:var(--accent-soft);color:var(--accent);
  font-size:12px;font-weight:800;font-family:var(--ff-num);
  display:flex;align-items:center;justify-content:center;
}
.article-body blockquote{
  margin:1.6em 0;padding:16px 20px;
  border-left:3px solid var(--brand);
  background:var(--brand-soft);
  border-radius:0 12px 12px 0;
  color:#28344B;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  border-radius:var(--radius-img);
  width:100%;
  margin:1.6em 0 .6em;
}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{
  font-size:13px;color:var(--ink-2);text-align:center;margin-top:8px;
}
.article-body table{
  width:100%;border-collapse:separate;border-spacing:0;
  border:1px solid var(--line);border-radius:var(--radius-img);
  overflow:hidden;font-size:15px;margin:1.6em 0;
}
.article-body table th{
  background:var(--brand-soft);color:var(--brand-deep);
  font-weight:700;text-align:left;padding:14px 16px;border:none;
}
.article-body table td{
  padding:13px 16px;border:none;border-top:1px solid var(--line);color:#28344B;
}
.article-body table tr:nth-child(even) td{background:#FAFCFF;}
.table-scroll{overflow-x:auto;}
.article-body a{color:var(--brand);font-weight:600;border-bottom:1px solid rgba(46,107,240,.35);}
.article-body a:hover{color:var(--brand-deep);border-bottom-color:var(--brand-deep);}

/* ---------- 文末标签 / 分享 ---------- */
.article-foot{
  margin-top:34px;padding-top:24px;border-top:1px dashed var(--line);
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;}
.tag-list span{
  display:inline-flex;align-items:center;
  padding:5px 13px;border-radius:999px;
  background:#F2F6FD;color:var(--ink-2);font-size:13px;font-weight:600;
}
.share-list{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-2);}
.share-btn{
  width:38px;height:38px;border-radius:12px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-2);
  display:inline-flex;align-items:center;justify-content:center;
  transition:all .2s ease;
}
.share-btn:hover{background:var(--brand-soft);color:var(--brand);border-color:#CFE0FF;transform:translateY(-2px);}

/* ---------- 侧栏 ---------- */
.side-col{display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow);
  padding:22px 22px 24px;
}
.side-card h3{
  font-size:16px;font-weight:700;margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.side-card h3 i{color:var(--brand);}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:none;overflow:auto;}
.toc-list a{
  display:block;font-size:14px;color:var(--ink-2);font-weight:600;
  padding:8px 10px;border-radius:10px;border-left:2px solid transparent;
  line-height:1.5;
}
.toc-list a:hover{background:var(--brand-soft);color:var(--brand);}
.toc-list a.active{
  background:var(--brand-soft);color:var(--brand);border-left-color:var(--brand);
}
.toc-list a.sub{padding-left:22px;font-weight:500;}
.toc-empty{font-size:13px;color:var(--ink-2);}
.side-mini-cta{
  background:var(--brand-soft);
  border:none;
  text-align:left;
}
.side-mini-cta h3{color:var(--brand-deep);}
.side-mini-cta p{font-size:14px;color:#3B4A66;margin-bottom:16px;}
.btn-solid{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:15px;font-weight:700;border:none;
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-solid:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:999px;
  background:transparent;color:var(--brand);font-size:15px;font-weight:700;
  border:1px solid #C9DBFF;transition:all .2s ease;
}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);transform:translateY(-2px);}
.side-wide{width:100%;}
.reco-list{display:flex;flex-direction:column;gap:14px;}
.reco-item{display:flex;gap:12px;align-items:flex-start;}
.reco-item img{
  width:72px;height:54px;object-fit:cover;border-radius:12px;flex:0 0 auto;
}
.reco-item .t{font-size:14px;font-weight:600;color:var(--ink);line-height:1.5;display:block;}
.reco-item:hover .t{color:var(--brand);}
.reco-item .d{font-size:12px;color:var(--ink-2);margin-top:4px;display:block;}

/* ---------- 相关推荐 ---------- */
.related{padding:8px 0 72px;}
.sec-head{margin-bottom:30px;}
.sec-head h2{font-size:30px;font-weight:700;}
.sec-head p{color:var(--ink-2);font-size:15px;margin-top:8px;}
.card-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease;height:100%;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.news-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--brand-soft);}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.news-card:hover .thumb img{transform:scale(1.04);}
.news-card .body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-card .cat{
  align-self:flex-start;padding:4px 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:700;
}
.news-card h3{font-size:17px;font-weight:600;line-height:1.5;}
.news-card:hover h3{color:var(--brand);}
.news-card p{font-size:14px;color:var(--ink-2);margin:0;}
.news-card .meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-2);display:flex;align-items:center;gap:8px;
}

/* ---------- 返回入口 / CTA ---------- */
.cta-band{
  background:var(--brand-soft);
  border-top:1px solid #DCE8FF;
  border-bottom:1px solid #DCE8FF;
  padding:64px 0;
  text-align:center;
}
.cta-band h2{font-size:30px;margin-bottom:12px;}
.cta-band p{color:#3B4A66;font-size:16px;margin-bottom:26px;}
.back-line{padding:26px 0 0;}

/* ---------- 空态 ---------- */
.empty-state{
  background:var(--surface);border:1px dashed #CFDBEE;border-radius:var(--radius-card);
  padding:60px 28px;text-align:center;box-shadow:var(--shadow);
}
.empty-state .ico{
  width:64px;height:64px;border-radius:18px;background:var(--brand-soft);
  color:var(--brand);display:flex;align-items:center;justify-content:center;
  font-size:26px;margin:0 auto 18px;
}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--ink-2);font-size:15px;margin-bottom:22px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--footer);color:#C7D2E4;margin-top:0;}
.site-footer .wrap{padding-top:64px;padding-bottom:24px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-col p{font-size:14px;line-height:1.85;color:#9FAEC6;margin:0;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul li a,.footer-col ul li span{font-size:14px;color:#9FAEC6;}
.footer-col ul li a:hover{color:var(--brand);}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:var(--brand);}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-sub{color:#8DA0BE;}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#8DA0BE;
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .article-body{padding:32px 28px 38px;}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:28px;}
}
@media (max-width:991.98px){
  .section{padding:56px 0;}
  .card-grid-3{grid-template-columns:repeat(2,1fr);}
  .side-col{position:static !important;margin-top:32px;}
  .article-layout{padding:32px 0 56px;}
}
@media (max-width:767.98px){
  .wrap{padding:0 16px;}
  .article-head{padding:28px 0 22px;}
  .article-body{padding:24px 18px 30px;font-size:16px;border-radius:16px;}
  .article-body h2{font-size:21px;margin-top:1.6em;}
  .article-body h3{font-size:18px;}
  .card-grid-3{grid-template-columns:1fr;gap:18px;}
  .cta-band{padding:48px 0;}
  .cta-band h2{font-size:23px;}
  .sec-head h2{font-size:23px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .meta-row{gap:14px;}
  .crumb .current{white-space:normal;max-width:100%;}
  .btn-solid,.btn-ghost{width:100%;}
}
@media (max-width:519.98px){
  .footer-grid{grid-template-columns:1fr;}
  .brand-sub{display:none;}
}

/* roulang page: category2 */
:root{
  --brand:#2E6BF0;
  --brand-deep:#1B4FD1;
  --brand-soft:#EAF1FE;
  --accent:#FF7A33;
  --accent-soft:#FFF0E6;
  --ink:#121A2B;
  --ink-2:#5A6884;
  --line:#E5ECF6;
  --bg:#F6F9FD;
  --surface:#FFFFFF;
  --footer:#101A2E;
  --radius-card:18px;
  --radius-img:16px;
  --radius-btn:12px;
  --radius-pill:999px;
  --shadow-1:0 2px 4px rgba(18,26,43,.04), 0 12px 28px rgba(18,26,43,.06);
  --shadow-2:0 18px 40px rgba(18,26,43,.10);
  --container:1200px;
  --gutter:24px;
  --font-cn:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"SF Mono",ui-monospace,"JetBrains Mono",Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;}
a:hover{color:var(--brand-deep);}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding-left:0;list-style:none;}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 3px var(--brand-soft);border-radius:6px;}

.wrap{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 var(--gutter);
}
.section{padding:96px 0;}
.section-sm{padding:64px 0;}
.section-white{background:var(--surface);}
.section-soft{background:var(--brand-soft);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--brand);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  padding:6px 14px;
}
.eyebrow.on-soft{background:var(--surface);}
.section-head{margin-bottom:44px;max-width:780px;}
.section-head h2{
  font-size:clamp(26px,2.6vw,34px);
  font-weight:700;
  line-height:1.35;
  letter-spacing:-.01em;
  margin:14px 0 12px;
}
.section-head p{color:var(--ink-2);font-size:16px;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 10px rgba(18,26,43,.04);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(18,26,43,.08);}
.header-inner{
  display:flex;
  align-items:center;
  gap:32px;
  height:72px;
  transition:height .25s ease;
}
.site-header.is-scrolled .header-inner{height:64px;}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
  color:var(--ink);
}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:42px;
  height:42px;
  border-radius:12px;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#fff;
  font-family:var(--font-num);
  font-size:16px;
  font-weight:700;
  letter-spacing:.02em;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:17px;font-weight:800;letter-spacing:-.01em;}
.brand-sub{font-size:12px;color:var(--ink-2);font-weight:500;letter-spacing:.06em;}

.nav-links{
  display:flex;
  align-items:center;
  gap:30px;
  margin:0;
}
.nav-links li{list-style:none;}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  font-weight:600;
  color:var(--ink);
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:2px;
  background:var(--brand);
  border-radius:2px;
  transition:width .25s ease;
}
.nav-links a:hover{color:var(--brand);}
.nav-links a:hover::after{width:100%;}
.nav-links a.active{color:var(--brand);}
.nav-links a.active::after{width:100%;}

.header-actions{
  display:flex;
  align-items:center;
  gap:18px;
  margin-left:auto;
}
.header-link{font-size:14px;font-weight:600;color:var(--ink-2);}
.header-link:hover{color:var(--brand);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:700;
  border-radius:var(--radius-pill);
  padding:12px 24px;
  transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary-cta{
  background:var(--brand);
  color:#fff;
  box-shadow:0 8px 20px rgba(46,107,240,.22);
}
.btn-primary-cta:hover{
  background:var(--brand-deep);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 14px 30px rgba(46,107,240,.30);
}
.btn-outline-cta{
  background:transparent;
  color:var(--brand);
  border:1px solid var(--brand);
}
.btn-outline-cta:hover{
  background:var(--brand-soft);
  color:var(--brand-deep);
  transform:translateY(-2px);
}
.btn-soft-cta{
  background:var(--surface);
  color:var(--brand);
  border:1px solid var(--line);
}
.btn-soft-cta:hover{
  background:var(--brand-soft);
  color:var(--brand-deep);
  border-color:var(--brand);
  transform:translateY(-2px);
}
.btn-lg{padding:15px 32px;font-size:16px;}

.nav-toggle{
  margin-left:auto;
  width:44px;
  height:44px;
  border-radius:var(--radius-btn);
  border:1px solid var(--line);
  background:var(--surface);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:20px;
  color:var(--ink);
}
.nav-toggle:hover{background:var(--brand-soft);color:var(--brand);}
.mobile-panel{
  display:none;
  border-top:1px solid var(--line);
  background:var(--surface);
  padding:18px 0 26px;
}
.mobile-panel.open{display:block;}
.mobile-panel .wrap{display:flex;flex-direction:column;gap:10px;}
.mobile-panel .btn{width:100%;}
.mobile-panel .m-link{
  display:block;
  padding:12px 4px;
  font-size:15px;
  font-weight:600;
  color:var(--ink);
  border-bottom:1px dashed var(--line);
}
.mobile-panel .m-link.active{color:var(--brand);}

/* ============ 页头区 ============ */
.cat-head{
  position:relative;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cat-head::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(46,107,240,.10) 1px,transparent 1px);
  background-size:20px 20px;
  opacity:.5;
  pointer-events:none;
}
.cat-head .wrap{position:relative;z-index:1;}
.breadcrumb-nav{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ink-2);
  padding:26px 0 4px;
}
.breadcrumb-nav a{color:var(--ink-2);font-weight:500;}
.breadcrumb-nav a:hover{color:var(--brand);}
.breadcrumb-nav .sep{color:#B9C4D8;}
.breadcrumb-nav .current{color:var(--ink-2);font-weight:600;}

.head-inner{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr);
  gap:56px;
  align-items:center;
  padding:34px 0 78px;
}
.head-main h1{
  font-size:clamp(30px,4vw,46px);
  font-weight:800;
  line-height:1.24;
  letter-spacing:-.02em;
  margin:18px 0 18px;
}
.head-main .lead{
  font-size:17px;
  color:var(--ink-2);
  max-width:640px;
}
.head-badges{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  font-weight:600;
  color:var(--brand-deep);
  background:var(--brand-soft);
  border-radius:var(--radius-pill);
  padding:6px 14px;
}
.tag.accent{color:#B64A11;background:var(--accent-soft);}
.tag.line{background:var(--surface);border:1px solid var(--line);color:var(--ink-2);}

.head-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:26px 24px 24px;
}
.head-card h2{
  font-size:18px;
  font-weight:700;
  margin-bottom:6px;
}
.head-card .sub{font-size:14px;color:var(--ink-2);margin-bottom:18px;}
.head-steps{display:flex;flex-direction:column;gap:14px;}
.head-steps li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:14px;
  color:var(--ink-2);
  line-height:1.7;
}
.head-steps .num{
  flex-shrink:0;
  width:26px;
  height:26px;
  border-radius:9px;
  background:var(--brand-soft);
  color:var(--brand-deep);
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-top:2px;
}
.head-steps strong{color:var(--ink);font-weight:700;}

/* ============ 数据条 ============ */
.stat-strip{
  background:var(--brand-soft);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0;
}
.stat-item{
  padding:30px 24px;
  border-right:1px solid rgba(46,107,240,.14);
}
.stat-item:last-child{border-right:0;}
.stat-item .k{
  font-family:var(--font-num);
  font-size:clamp(28px,3vw,40px);
  font-weight:800;
  color:var(--brand-deep);
  line-height:1.1;
  letter-spacing:-.02em;
}
.stat-item .t{
  font-size:14px;
  font-weight:700;
  color:var(--ink);
  margin-top:8px;
}
.stat-item .d{font-size:13px;color:var(--ink-2);}

/* ============ 卡片网格 ============ */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.rule-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  height:100%;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.rule-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-2);
  border-color:rgba(46,107,240,.28);
}
.rule-card .thumb{
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--brand-soft);
}
.rule-card .thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.rule-card:hover .thumb img{transform:scale(1.04);}
.rule-card .body{
  padding:22px 22px 24px;
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1;
}
.rule-card h3{
  font-size:18px;
  font-weight:700;
  line-height:1.45;
}
.rule-card p{
  font-size:14.5px;
  color:var(--ink-2);
  line-height:1.75;
}
.rule-card .meta{
  margin-top:auto;
  padding-top:14px;
  border-top:1px dashed var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}
.rule-card .meta .idx{
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  color:var(--ink-2);
  letter-spacing:.06em;
}
.arrow-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:700;
  color:var(--brand);
}
.arrow-link i{transition:transform .25s ease;}
.arrow-link:hover i{transform:translateX(4px);}

/* ============ 规则对照表 ============ */
.table-shell{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.table-scroll{overflow-x:auto;}
.rule-table{
  width:100%;
  min-width:720px;
  border-collapse:collapse;
  margin:0;
  background:var(--surface);
}
.rule-table thead th{
  background:var(--brand-soft);
  color:var(--brand-deep);
  font-size:14px;
  font-weight:700;
  text-align:left;
  padding:18px 22px;
  border:0;
  white-space:nowrap;
}
.rule-table tbody td{
  padding:18px 22px;
  font-size:14.5px;
  color:var(--ink-2);
  border:0;
  border-top:1px solid var(--line);
  line-height:1.7;
  vertical-align:middle;
  height:52px;
}
.rule-table tbody tr:nth-child(even) td{background:#FBFCFE;}
.rule-table tbody tr:hover td{background:var(--brand-soft);}
.rule-table tbody td:first-child{
  color:var(--ink);
  font-weight:700;
  white-space:nowrap;
}
.table-note{
  font-size:13px;
  color:var(--ink-2);
  padding:16px 22px;
  border-top:1px solid var(--line);
  background:var(--surface);
}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-accordion .accordion-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  margin-bottom:12px;
  overflow:hidden;
}
.faq-accordion .accordion-button{
  background:var(--surface);
  color:var(--ink);
  font-size:16px;
  font-weight:700;
  padding:22px 24px;
  border:0;
  box-shadow:none;
  display:flex;
  align-items:center;
  gap:14px;
}
.faq-accordion .accordion-button:not(.collapsed){
  background:var(--surface);
  color:var(--brand-deep);
  box-shadow:none;
}
.faq-accordion .accordion-button:focus{
  box-shadow:0 0 0 3px var(--brand-soft);
  border-color:var(--brand);
  outline:none;
}
.faq-accordion .accordion-button::after{
  content:"\F282";
  font-family:"bootstrap-icons";
  background-image:none;
  width:auto;
  height:auto;
  font-size:14px;
  color:var(--brand);
  transition:transform .25s ease;
  margin-left:auto;
}
.faq-accordion .accordion-button:not(.collapsed)::after{transform:rotate(180deg);}
.faq-accordion .accordion-body{
  position:relative;
  padding:0 24px 24px 24px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-2);
  background:var(--surface);
}
.faq-accordion .accordion-body::before{
  content:"";
  position:absolute;
  left:0;
  top:2px;
  bottom:22px;
  width:3px;
  border-radius:3px;
  background:var(--brand);
}

/* ============ CTA ============ */
.cta-band{
  background:var(--brand-soft);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  text-align:center;
  padding:72px 0;
}
.cta-band h2{
  font-size:clamp(24px,2.4vw,32px);
  font-weight:700;
  line-height:1.4;
  margin-bottom:12px;
}
.cta-band p{
  color:var(--ink-2);
  font-size:16px;
  max-width:640px;
  margin:0 auto 28px;
}
.cta-actions{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  flex-wrap:wrap;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--footer);
  color:#C7D0E1;
  padding:72px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:18px;
}
.footer-brand .brand-mark{
  background:rgba(255,255,255,.10);
  color:#fff;
}
.footer-brand .brand-name{color:#fff;font-size:17px;font-weight:800;}
.footer-brand .brand-sub{color:#94A2BE;font-size:12px;letter-spacing:.06em;}
.footer-col p{
  font-size:14px;
  line-height:1.85;
  color:#9AA8C2;
  max-width:380px;
}
.footer-col h4{
  font-size:15px;
  font-weight:700;
  color:#fff;
  margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col ul li{font-size:14px;color:#9AA8C2;}
.footer-col ul a{color:#9AA8C2;}
.footer-col ul a:hover{color:var(--brand);}
.footer-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.10);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:#8391AC;
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  :root{--gutter:20px;}
  .section{padding:80px 0;}
  .head-inner{gap:36px;padding-bottom:64px;}
  .stat-item{padding:26px 18px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:991.98px){
  .section{padding:64px 0;}
  .head-inner{
    grid-template-columns:1fr;
    gap:28px;
    padding:28px 0 56px;
  }
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-item{border-right:0;border-bottom:1px solid rgba(46,107,240,.14);}
  .stat-item:nth-child(odd){border-right:1px solid rgba(46,107,240,.14);}
  .stat-item:nth-last-child(-n+2){border-bottom:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767.98px){
  :root{--gutter:16px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .card-grid{grid-template-columns:1fr;}
  .head-main h1{font-size:28px;}
  .head-main .lead{font-size:15.5px;}
  .head-card{padding:22px 20px;}
  .stat-grid{grid-template-columns:1fr;}
  .stat-item{border-right:0 !important;border-bottom:1px solid rgba(46,107,240,.14);}
  .stat-item:last-child{border-bottom:0;}
  .cta-actions .btn{width:100%;}
  .cta-band{padding:56px 0;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .rule-table thead th,
  .rule-table tbody td{padding:16px 16px;font-size:14px;}
}
@media (max-width:520px){
  .head-main h1{font-size:25px;line-height:1.3;}
  .brand-name{font-size:15.5px;}
  .brand-sub{font-size:11px;}
  .rule-card .body{padding:18px 18px 20px;}
  .faq-accordion .accordion-button{padding:18px 18px;font-size:15px;}
  .faq-accordion .accordion-body{padding:0 18px 20px 18px;}
}

/* roulang page: category1 */
:root{
  --brand:#2E6BF0;
  --brand-deep:#1B4FD1;
  --brand-soft:#EAF1FE;
  --accent:#FF7A33;
  --accent-soft:#FFF0E6;
  --teal:#12A18A;
  --teal-soft:#E7F6F2;
  --ink:#121A2B;
  --ink-2:#5A6884;
  --line:#E5ECF6;
  --bg:#F6F9FD;
  --surface:#FFFFFF;
  --footer:#101A2E;
  --r-card:18px;
  --r-img:16px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 2px 4px rgba(18,26,43,.04), 0 12px 28px rgba(18,26,43,.06);
  --sh-2:0 18px 40px rgba(18,26,43,.10);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand)}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;box-shadow:0 0 0 3px var(--brand-soft)}
::selection{background:var(--brand-soft);color:var(--brand-deep)}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.wrap-kv{max-width:1320px;margin:0 auto;padding:0 24px}

/* 覆盖 Bootstrap 默认观感 */
.btn{font-weight:600;border-radius:var(--r-input)}
.btn-primary{background:var(--brand);border-color:var(--brand);box-shadow:none}
.btn-primary:hover,.btn-primary:focus{background:var(--brand-deep);border-color:var(--brand-deep)}
.btn-check:focus+.btn-primary,.btn-primary:focus{box-shadow:0 0 0 4px rgba(46,107,240,.18)}
.collapse{transition:height .28s ease}
.table>:not(caption)>*>*{border-bottom-width:1px;border-color:var(--line)}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 4px rgba(18,26,43,.03);
  transition:box-shadow .25s ease,padding .25s ease;
}
.site-header.scrolled{box-shadow:0 6px 20px rgba(18,26,43,.07)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;transition:height .25s ease}
.site-header.scrolled .header-inner{height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:var(--brand);color:#fff;
  display:grid;place-items:center;
  font-weight:800;font-size:14px;letter-spacing:.5px;
}
.brand-name{display:block;font-size:16px;font-weight:800;line-height:1.15;color:var(--ink)}
.brand-sub{display:block;font-size:12px;line-height:1.2;color:var(--ink-2);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{position:relative;display:inline-block;padding:6px 0;font-size:15px;font-weight:600;color:var(--ink)}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--brand);border-radius:2px;transition:width .25s ease;
}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-links a.active{color:var(--brand)}
.header-actions{display:flex;align-items:center;gap:18px}
.btn-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-pill);
  background:var(--brand);color:#fff;
  font-size:15px;font-weight:700;line-height:1;
  box-shadow:0 6px 16px rgba(46,107,240,.22);
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease;
}
.btn-cta:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(27,79,209,.28)}
.btn-cta svg{width:15px;height:15px}
.header-link{font-size:14.5px;font-weight:600;color:var(--ink-2)}
.header-link:hover{color:var(--brand)}
.nav-toggle{
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:var(--surface);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .25s ease,opacity .2s ease}
.nav-toggle.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-panel{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease;
  border-top:1px solid transparent;
}
.mobile-panel.open{max-height:340px;border-top-color:var(--line)}
.mobile-inner{padding:18px 0 24px;display:flex;flex-direction:column;gap:14px}
.mobile-inner .btn-cta{justify-content:center;width:100%;padding:14px 22px}
.mobile-links{display:flex;flex-direction:column}
.mobile-links a{display:block;padding:12px 2px;font-size:15.5px;font-weight:600;border-bottom:1px solid var(--line)}
.mobile-links a.active{color:var(--brand)}

/* 分类页窄幅 KV */
.cat-kv{
  position:relative;
  background-image:linear-gradient(90deg,rgba(255,255,255,.95) 0%,rgba(255,255,255,.80) 42%,rgba(255,255,255,.40) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center right;
  border-bottom:1px solid var(--line);
}
.cat-kv-inner{
  min-height:300px;
  display:flex;flex-direction:column;justify-content:center;
  padding:56px 0;
}
.cat-kv .kv-tag{
  display:inline-flex;align-items:center;gap:8px;
  align-self:flex-start;
  padding:6px 14px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-deep);
  font-size:13px;font-weight:700;letter-spacing:.04em;
  margin-bottom:18px;
}
.cat-kv h1{
  font-size:clamp(28px,3.6vw,44px);
  font-weight:800;line-height:1.25;
  max-width:760px;letter-spacing:-.01em;
}
.cat-kv .kv-desc{
  margin-top:16px;max-width:620px;
  font-size:16.5px;line-height:1.85;color:var(--ink-2);
}
.cat-kv .kv-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-pill);
  border:1.5px solid var(--brand);color:var(--brand);
  font-size:15px;font-weight:700;line-height:1;background:transparent;
  transition:background .2s ease,transform .2s ease,color .2s ease;
}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);transform:translateY(-2px)}

/* 面包屑 */
.crumb-bar{background:var(--surface);border-bottom:1px solid var(--line)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:14px 0;font-size:14px;color:var(--ink-2)}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#B8C4D8}
.crumb .current{color:var(--ink-2)}

/* 指标条 */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  padding:30px 0;border-bottom:1px solid var(--line);
}
.stat-item .stat-num{
  font-family:var(--mono);
  font-size:clamp(28px,3vw,40px);font-weight:800;line-height:1.1;
  color:var(--accent);letter-spacing:-.02em;
}
.stat-item .stat-label{display:block;margin-top:6px;font-size:14px;color:var(--ink-2)}

/* 主区 */
.main-area{padding:56px 0 72px}

/* 目录 */
.toc-card{
  position:sticky;top:92px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:20px;
  box-shadow:var(--sh-1);
}
.toc-title{
  font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--ink-2);text-transform:uppercase;margin-bottom:12px;
}
.toc-list{display:flex;flex-direction:column;gap:4px}
.toc-list a{
  display:flex;align-items:baseline;gap:10px;
  padding:10px 12px;border-radius:12px;
  border-left:3px solid transparent;
  font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.toc-list a .toc-num{font-family:var(--mono);font-size:12px;font-weight:700;color:var(--accent)}
.toc-list a:hover{background:var(--brand-soft);color:var(--brand)}
.toc-list a.active{background:var(--brand-soft);color:var(--brand);border-left-color:var(--brand)}
.toc-note{
  margin-top:16px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13.5px;line-height:1.75;color:var(--ink-2);
}

/* 内容面板 */
.content-stack{display:flex;flex-direction:column;gap:24px}
.panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:32px;
  box-shadow:var(--sh-1);
  scroll-margin-top:96px;
}
.panel-kicker{
  display:inline-block;margin-bottom:10px;
  font-size:13px;font-weight:700;letter-spacing:.1em;
  color:var(--accent);
}
.panel h2{font-size:clamp(22px,2.2vw,30px);font-weight:700;line-height:1.35;letter-spacing:-.01em}
.panel h3{font-size:19px;font-weight:700;line-height:1.4;margin-top:22px}
.panel p{color:var(--ink-2);line-height:1.85}
.panel p+p{margin-top:14px}
.panel-img{
  border-radius:var(--r-img);overflow:hidden;
  aspect-ratio:16/10;background:var(--brand-soft);
}
.panel-img img{width:100%;height:100%;object-fit:cover}
.tick-list{margin-top:18px;display:flex;flex-direction:column;gap:12px}
.tick-list li{position:relative;padding-left:28px;font-size:15.5px;color:var(--ink-2)}
.tick-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:10px;height:10px;border-radius:3px;
  background:var(--brand-soft);border:2px solid var(--brand);
}
.mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:20px}
.mini-item{
  background:var(--bg);border:1px solid var(--line);
  border-radius:14px;padding:16px 18px;
}
.mini-item strong{display:block;font-size:15px;font-weight:700;color:var(--ink)}
.mini-item span{display:block;margin-top:6px;font-size:14px;color:var(--ink-2);line-height:1.7}

/* 编号清单 */
.step-list li{
  display:flex;gap:18px;align-items:flex-start;
  padding:20px 0;border-bottom:1px dashed var(--line);
}
.step-list li:last-child{border-bottom:0;padding-bottom:0}
.step-list li:first-child{padding-top:6px}
.num-badge{
  flex:0 0 38px;height:38px;border-radius:12px;
  background:var(--accent-soft);color:var(--accent);
  font-family:var(--mono);font-size:14px;font-weight:800;
  display:grid;place-items:center;
}
.step-body strong{display:block;font-size:16px;font-weight:700;color:var(--ink)}
.step-body span{display:block;margin-top:6px;font-size:14.5px;color:var(--ink-2);line-height:1.8}

/* 要点卡组 */
.point-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:22px}
.point-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:16px;
  padding:20px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.point-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D8E4FA}
.point-icon{
  width:36px;height:36px;border-radius:12px;
  background:var(--teal-soft);color:var(--teal);
  display:grid;place-items:center;margin-bottom:12px;
}
.point-card h3{font-size:17px;font-weight:700;margin:0}
.point-card p{margin-top:8px;font-size:14.5px;color:var(--ink-2);line-height:1.75}

/* FAQ */
.faq-area{padding:0 0 72px}
.faq-head{max-width:760px;margin-bottom:26px}
.faq-head h2{font-size:clamp(24px,2.4vw,32px);font-weight:700;line-height:1.35}
.faq-head p{margin-top:12px;color:var(--ink-2)}
.faq-wrap{max-width:900px}
.acc-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  margin-bottom:12px;
  overflow:hidden;
  transition:box-shadow .22s ease,border-color .22s ease;
}
.acc-item:hover{box-shadow:var(--sh-1)}
.acc-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;text-align:left;
  font-size:16.5px;font-weight:700;color:var(--ink);line-height:1.5;
}
.acc-btn .chev{
  flex:0 0 22px;width:22px;height:22px;
  display:grid;place-items:center;
  color:var(--brand);transition:transform .28s ease;
}
.acc-btn .chev svg{width:16px;height:16px}
.acc-btn:not(.collapsed) .chev{transform:rotate(180deg)}
.acc-body{
  margin:0 24px 22px;padding:2px 0 2px 16px;
  border-left:3px solid var(--brand);
  font-size:15px;line-height:1.85;color:var(--ink-2);
}

/* CTA 通栏 */
.cta-band{
  background:var(--brand-soft);
  border-top:1px solid #DCE8FD;
  border-bottom:1px solid #DCE8FD;
  padding:72px 0;
}
.cta-inner{max-width:700px;margin:0 auto;text-align:center}
.cta-inner h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.35}
.cta-inner p{margin-top:14px;color:var(--ink-2)}
.cta-inner .btn-cta{margin-top:26px;padding:14px 30px;font-size:16px}

/* 页脚 */
.site-footer{background:var(--footer);color:#C9D3E4;padding:64px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{width:36px;height:36px;background:var(--brand);font-size:13px}
.footer-brand .brand-name{color:#fff;font-size:15.5px;font-weight:800;display:block;line-height:1.15}
.footer-brand .brand-sub{color:#93A3BE;font-size:12px;display:block;line-height:1.2}
.footer-col p{font-size:14px;line-height:1.85;color:#9EACC6}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a,.footer-col ul span{font-size:14px;color:#9EACC6;line-height:1.7}
.footer-col ul a:hover{color:var(--brand)}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13.5px;color:#8394B0;
}

/* 响应式 */
@media (max-width:1199px){
  .nav-links{gap:22px}
  .header-actions{gap:14px}
}
@media (max-width:991px){
  .main-area{padding:40px 0 56px}
  .toc-card{position:static;top:auto;margin-bottom:4px}
  .toc-list{flex-direction:row;flex-wrap:wrap;gap:8px}
  .toc-list a{border-left:0;border:1px solid var(--line);border-radius:var(--r-pill);padding:8px 14px;font-size:14px}
  .toc-list a.active{border-color:var(--brand)}
  .toc-note{display:none}
  .stat-strip{grid-template-columns:repeat(2,1fr);gap:18px 24px}
  .cta-band{padding:56px 0}
  .site-footer{padding:48px 0 22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .wrap{padding:0 16px}
  .wrap-kv{padding:0 16px}
  .cat-kv-inner{min-height:auto;padding:40px 0}
  .cat-kv .kv-actions .btn-cta,.cat-kv .kv-actions .btn-ghost{width:100%;justify-content:center}
  .panel{padding:20px}
  .mini-grid{grid-template-columns:1fr}
  .point-grid{grid-template-columns:1fr}
  .acc-btn{padding:16px 18px;font-size:15.5px}
  .acc-body{margin:0 18px 18px;padding-left:14px}
  .stat-strip{padding:24px 0}
  .stat-item .stat-label{font-size:13.5px}
  .cta-inner .btn-cta{width:100%;justify-content:center}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;gap:6px}
}
@media (max-width:520px){
  .brand-sub{font-size:11px}
  .cat-kv h1{font-size:26px}
  .step-list li{gap:14px}
}