/* roulang page: index */
:root{
  --brand-700:#14479E;
  --brand-600:#1B5FD0;
  --brand-500:#2E75E8;
  --brand-100:#E3EDFB;
  --accent:#F2864A;
  --ink-900:#101828;
  --ink-700:#344054;
  --ink-500:#667085;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E4E9F2;
  --footer:#0E1E3A;
  --r-xl:20px;
  --r-lg:16px;
  --r-sm:10px;
  --sh-1:0 2px 8px rgba(23,43,77,.06);
  --sh-2:0 8px 24px rgba(23,43,77,.08);
  --sh-3:0 14px 32px rgba(23,43,77,.12);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  background:var(--bg);
  color:var(--ink-700);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .22s ease,transform .22s ease,background-color .22s ease;}
a:hover{color:var(--brand-700);}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:-.01em;}
h1{font-size:40px;line-height:1.22;}
h2{font-size:28px;line-height:1.35;}
h3{font-size:20px;line-height:1.5;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media(min-width:1400px){.container{max-width:1240px;}}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:1000;padding:12px 0 0;}
.nav-card{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  background:rgba(255,255,255,.95);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--sh-2);
  padding:10px 14px;
  transition:box-shadow .25s ease,padding .25s ease;
}
.site-header.is-scrolled .nav-card{box-shadow:0 14px 34px rgba(23,43,77,.14);padding:8px 14px;}
.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--ink-900);white-space:nowrap;flex:0 0 auto;}
.brand:hover{color:var(--ink-900);}
.brand-mark{
  width:34px;height:34px;border-radius:11px;
  background:var(--brand-600);
  color:#fff;display:grid;place-items:center;font-size:15px;font-weight:800;letter-spacing:.02em;
}
.brand-sub{font-size:12px;font-weight:600;color:var(--ink-500);letter-spacing:.06em;display:block;line-height:1.2;}
.nav-body{display:flex;align-items:center;justify-content:space-between;gap:16px;flex:1;min-width:0;}
.nav-links{display:flex;align-items:center;gap:8px;flex-wrap:wrap;min-width:0;}
.nav-pill{
  display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 14px;
  border-radius:10px;background:var(--brand-100);color:var(--brand-700);
  font-size:14px;font-weight:600;
  transition:background-color .22s ease,box-shadow .22s ease,transform .22s ease,color .22s ease;
}
.nav-pill:hover{background:#fff;box-shadow:var(--sh-1);color:var(--brand-700);transform:translateY(-1px);}
.nav-pill.active{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(27,95,208,.28);}
.nav-pill.active:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:11px;border:1px solid var(--line);
  background:#fff;color:var(--ink-900);align-items:center;justify-content:center;cursor:pointer;
  transition:box-shadow .22s ease,transform .22s ease;
}
.nav-toggle:hover{box-shadow:var(--sh-1);transform:translateY(-1px);}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  color:var(--ink-500);display:grid;place-items:center;cursor:pointer;
  transition:color .22s ease,border-color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.icon-btn:hover{color:var(--brand-600);border-color:var(--brand-500);box-shadow:var(--sh-1);transform:translateY(-1px);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background-color .22s ease,color .22s ease,box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(27,95,208,.22);}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-secondary{background:#fff;border-color:var(--line);color:var(--brand-600);}
.btn-secondary:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-700);transform:translateY(-2px);}
.btn-light{background:#fff;color:var(--brand-700);box-shadow:0 8px 20px rgba(0,0,0,.14);}
.btn-light:hover{background:#F0F5FF;color:var(--brand-700);transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,0,0,.2);}
.link-more{font-size:14px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px;}
.link-more:hover{color:var(--brand-700);transform:translateX(2px);}

/* ============ 通用板块 ============ */
.section{padding-top:96px;}
main{padding-bottom:8px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px;}
.section-sub{margin-top:8px;font-size:15px;color:var(--ink-500);line-height:1.8;max-width:52em;}
.badge-soft{
  display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:6px;
  background:var(--brand-100);color:var(--brand-700);font-size:13px;font-weight:600;white-space:nowrap;
}

/* ============ 首屏 ============ */
.hero-section{padding-top:28px;}
.hero-card{
  display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);
  box-shadow:var(--sh-2);padding:44px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);border-radius:8px;padding:5px 12px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);}
.hero-copy h1{max-width:16em;}
.hero-sub{margin-top:12px;font-size:17px;line-height:1.75;color:var(--ink-500);max-width:30em;}
.hero-actions{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap;}
.hero-tags{margin-top:20px;font-size:13px;color:var(--ink-500);letter-spacing:.02em;}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:4/3;background:var(--brand-100);}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:40%;
  background:linear-gradient(to top,rgba(27,95,208,.12),rgba(27,95,208,0));
  pointer-events:none;
}

/* ============ 合集目录 ============ */
.catalog-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start;}
.catalog-group{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh-1);}
.catalog-group + .catalog-group{margin-top:24px;}
.catalog-group h3{font-size:16px;font-weight:700;display:flex;align-items:center;gap:10px;margin-bottom:8px;}
.catalog-group h3::before{content:"";width:3px;height:16px;border-radius:2px;background:var(--brand-600);flex:0 0 auto;}
.catalog-list li a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:14px;line-height:2.2;color:var(--ink-700);padding:0 2px;
}
.catalog-list li a::after{content:"›";font-size:16px;color:var(--ink-500);transition:color .22s ease,transform .22s ease;}
.catalog-list li a:hover{color:var(--brand-600);transform:translateX(2px);}
.catalog-list li a:hover::after{color:var(--accent);transform:translateX(2px);}

/* ============ 精选条目 ============ */
.entry-list{display:flex;flex-direction:column;gap:14px;}
.entry-row{
  position:relative;display:flex;align-items:center;gap:20px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px 26px 22px 30px;box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.entry-row::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--accent);}
.entry-row:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:#D5E2F8;}
.entry-num{flex:0 0 auto;min-width:40px;font-size:20px;font-weight:800;color:var(--brand-500);opacity:.55;letter-spacing:.02em;}
.entry-body{flex:1;min-width:0;}
.entry-body h3{font-size:18px;font-weight:600;line-height:1.5;transition:color .22s ease;}
.entry-row:hover .entry-body h3{color:var(--brand-600);}
.entry-body p{
  margin-top:6px;font-size:14px;line-height:1.7;color:var(--ink-500);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.entry-meta{flex:0 0 auto;display:flex;flex-direction:column;align-items:flex-end;gap:8px;}
.entry-date{font-size:13px;color:var(--ink-500);}

/* ============ 最新信息 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:#D5E2F8;}
.news-cover{position:relative;display:block;aspect-ratio:16/10;overflow:hidden;background:var(--brand-100);}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.news-card:hover .news-cover img{transform:scale(1.03);}
.news-cover .badge-soft{position:absolute;top:12px;left:12px;background:rgba(255,255,255,.94);}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;min-width:0;}
.news-body h3{
  font-size:17px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .22s ease;
}
.news-body h3 a{color:inherit;}
.news-card:hover .news-body h3{color:var(--brand-600);}
.news-body > p{
  font-size:14px;line-height:1.7;color:var(--ink-500);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--ink-500);
}
.news-foot a{font-weight:600;font-size:13px;}
.empty-state{
  grid-column:1/-1;border:1px dashed #C7D3E6;border-radius:var(--r-lg);
  background:rgba(255,255,255,.7);padding:48px 24px;text-align:center;
}
.empty-state p{font-size:15px;color:var(--ink-500);margin-bottom:16px;}

/* ============ 相关推荐 ============ */
.compact-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.compact-card{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px 22px;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.compact-card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:#D5E2F8;}
.compact-icon{
  flex:0 0 auto;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-600);
  transition:background-color .22s ease,color .22s ease;
}
.compact-card:hover .compact-icon{background:var(--brand-600);color:#fff;}
.compact-body h3{font-size:16px;font-weight:600;line-height:1.5;transition:color .22s ease;}
.compact-card:hover .compact-body h3{color:var(--brand-600);}
.compact-body p{margin-top:6px;font-size:14px;line-height:1.7;color:var(--ink-500);}

/* ============ FAQ ============ */
.faq-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:6px 24px;}
.faq-wrap .accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent;}
.faq-wrap .accordion-item:last-child{border-bottom:0;}
.faq-wrap .accordion-button{
  position:relative;background:transparent;box-shadow:none;border:0;
  font-size:16px;font-weight:600;color:var(--ink-900);
  padding:20px 8px 20px 18px;line-height:1.6;
  transition:color .22s ease,padding .22s ease;
}
.faq-wrap .accordion-button:not(.collapsed){color:var(--brand-600);background:transparent;box-shadow:none;}
.faq-wrap .accordion-button:focus{box-shadow:none;border:0;}
.faq-wrap .accordion-button::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:2px;background:var(--accent);
  transition:height .25s ease;
}
.faq-wrap .accordion-button:not(.collapsed)::before{height:22px;}
.faq-wrap .accordion-button::after{
  content:"+";background-image:none;width:26px;height:26px;border-radius:8px;
  background-color:var(--brand-100);color:var(--brand-600);
  display:grid;place-items:center;font-size:15px;font-weight:700;
  transform:none;margin-left:auto;flex:0 0 auto;
  transition:background-color .25s ease,color .25s ease,transform .25s ease;
}
.faq-wrap .accordion-button:not(.collapsed)::after{
  content:"−";background-color:var(--brand-600);color:#fff;transform:rotate(180deg);
}
.faq-wrap .accordion-body{
  padding:0 8px 22px 18px;font-size:15px;line-height:1.9;color:var(--ink-700);max-width:60em;
}

/* ============ CTA 条 ============ */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  background:var(--brand-700);border-radius:var(--r-xl);padding:36px 40px;box-shadow:var(--sh-2);
}
.cta-band h2{color:#fff;font-size:24px;}
.cta-band p{color:rgba(255,255,255,.78);font-size:15px;margin-top:8px;max-width:38em;}
.cta-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.share-btn{
  width:44px;height:44px;border-radius:10px;border:1px solid rgba(255,255,255,.34);
  background:rgba(255,255,255,.08);color:#fff;display:grid;place-items:center;cursor:pointer;
  transition:background-color .22s ease,color .22s ease,transform .22s ease,border-color .22s ease;
}
.share-btn:hover{background:#fff;color:var(--brand-700);border-color:#fff;transform:translateY(-2px);}

/* ============ 页脚 ============ */
.site-footer{margin-top:96px;background:var(--footer);color:rgba(255,255,255,.65);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:700;margin-bottom:14px;}
.footer-brand .brand-mark{background:var(--brand-500);}
.footer-about{font-size:14px;line-height:1.9;color:rgba(255,255,255,.65);max-width:26em;}
.footer-col h3{color:rgba(255,255,255,.9);font-size:14px;font-weight:700;margin-bottom:14px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{display:inline-block;color:rgba(255,255,255,.65);font-size:14px;}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .compact-grid{grid-template-columns:1fr;}
}
@media (max-width:991.98px){
  h1{font-size:32px;}
  h2{font-size:24px;}
  .section{padding-top:72px;}
  .hero-card{grid-template-columns:1fr;gap:28px;padding:28px;}
  .hero-media{order:-1;aspect-ratio:16/10;}
  .catalog-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .site-footer{margin-top:72px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .nav-toggle{display:flex;order:1;margin-left:auto;}
  .brand{order:0;}
  .nav-body{
    order:2;display:none;width:100%;flex-direction:column;align-items:stretch;
    gap:12px;padding-top:14px;border-top:1px solid var(--line);
  }
  .nav-body.open{display:flex;}
  .nav-links{display:grid;grid-template-columns:1fr 1fr;gap:8px;width:100%;}
  .nav-pill{justify-content:center;height:44px;}
  .nav-actions{width:100%;justify-content:flex-start;}
}
@media (max-width:767.98px){
  .news-grid{grid-template-columns:1fr;}
  .entry-row{flex-direction:column;align-items:flex-start;gap:12px;padding:20px 20px 20px 24px;}
  .entry-meta{flex-direction:row;align-items:center;gap:12px;}
  .cta-band{padding:28px 24px;flex-direction:column;align-items:flex-start;}
  .faq-wrap{padding:4px 18px;}
}
@media (max-width:575.98px){
  h1{font-size:27px;line-height:1.3;}
  h2{font-size:21px;}
  .container{padding:0 16px;}
  .section{padding-top:48px;}
  .hero-card{padding:20px;}
  .hero-actions .btn{width:100%;}
  .catalog-group{padding:20px;}
  .news-body{padding:18px;}
  .compact-card{padding:18px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .site-footer{margin-top:48px;padding-top:48px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
}

/* roulang page: article */
:root{
  --brand-700:#14479E;
  --brand-600:#1B5FD0;
  --brand-500:#2E75E8;
  --brand-100:#E3EDFB;
  --accent:#F2864A;
  --ink-900:#101828;
  --ink-700:#344054;
  --ink-500:#667085;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E4E9F2;
  --footer:#0E1E3A;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --l1:0 2px 8px rgba(23,43,77,.06);
  --l2:0 8px 24px rgba(23,43,77,.08);
  --l3:0 14px 32px rgba(23,43,77,.12);
  --sec:96px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-700);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .22s ease,background-color .22s ease,box-shadow .22s ease,transform .22s ease}
a:hover{color:var(--brand-700)}
button,input{font-family:inherit}
button{cursor:pointer}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:-.01em;line-height:1.35}
p{margin:0 0 18px}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:1400px){.container{max-width:1240px}}

/* ============ header / nav ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  padding-top:12px;
  padding-bottom:6px;
  background:linear-gradient(180deg,rgba(244,247,252,.96) 60%,rgba(244,247,252,0));
  backdrop-filter:blur(6px);
}
.nav-card{
  display:flex;
  align-items:center;
  gap:18px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--l2);
  padding:12px 18px;
  transition:box-shadow .22s ease,padding .22s ease;
}
.site-header.is-scrolled .nav-card{box-shadow:0 12px 30px rgba(23,43,77,.12);padding:9px 18px}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--ink-900);
  font-weight:700;
  font-size:17px;
  white-space:nowrap;
}
.brand:hover{color:var(--brand-600)}
.brand-mark{
  width:36px;height:36px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;
  background:var(--brand-600);
  color:#fff;
  font-weight:700;
  font-size:17px;
  box-shadow:var(--l1);
  flex:0 0 auto;
}
.brand-sub{
  display:block;
  font-size:11px;
  font-weight:500;
  color:var(--ink-500);
  letter-spacing:.06em;
  line-height:1.2;
}
.nav-toggle{
  display:none;
  margin-left:auto;
  width:42px;height:42px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:var(--surface);
  color:var(--ink-900);
  align-items:center;justify-content:center;
  transition:background-color .22s ease,box-shadow .22s ease;
}
.nav-toggle:hover{background:var(--brand-100);box-shadow:var(--l1)}
.nav-body{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex:1;
  min-width:0;
}
.nav-links{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.nav-pill{
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 14px;
  border-radius:var(--r-sm);
  background:var(--brand-100);
  color:var(--brand-600);
  font-size:14px;
  font-weight:600;
  transition:background-color .22s ease,box-shadow .22s ease,transform .22s ease,color .22s ease;
}
.nav-pill:hover{background:#fff;box-shadow:var(--l1);transform:translateY(-1px);color:var(--brand-700)}
.nav-pill.active{background:var(--brand-600);color:#fff;box-shadow:var(--l1)}
.nav-pill.active:hover{background:var(--brand-700);color:#fff}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* ============ buttons ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  padding:0 20px;
  height:46px;
  line-height:1;
  transition:background-color .22s ease,border-color .22s ease,box-shadow .22s ease,transform .22s ease,color .22s ease;
}
.btn-sm{height:40px;font-size:14px;padding:0 16px}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--l1)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px);box-shadow:var(--l2)}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-700);transform:translateY(-2px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#e0753a;color:#fff;transform:translateY(-2px);box-shadow:var(--l2)}
.icon-btn{
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink-700);
  transition:background-color .22s ease,color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.icon-btn:hover{background:var(--brand-100);color:var(--brand-700);box-shadow:var(--l1);transform:translateY(-2px)}

/* ============ breadcrumb ============ */
.page-top{padding-top:28px}
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ink-500);
}
.crumbs a{color:var(--ink-500)}
.crumbs a:hover{color:var(--brand-600)}
.crumbs .sep{color:#c3cbdb}
.crumbs .current{color:var(--brand-600);font-weight:600}

/* ============ article ============ */
.article-wrap{padding:34px 0 var(--sec)}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 260px;
  gap:32px;
  align-items:start;
}
.article-main{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--l1);
  padding:40px 44px 48px;
}
.article-head .kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--brand-600);
  background:var(--brand-100);
  border-radius:6px;
  padding:4px 10px;
  margin-bottom:14px;
}
.article-head h1{
  font-size:40px;
  line-height:1.25;
  letter-spacing:-.01em;
  margin-bottom:16px;
}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 14px;
  font-size:14px;
  color:var(--ink-500);
  padding-bottom:24px;
  margin-bottom:26px;
  border-bottom:1px solid var(--line);
}
.meta-row .dot{color:#c3cbdb}
.meta-row .tagline{color:var(--brand-600);font-weight:600}
.cover-figure{
  margin:0 0 30px;
  border-radius:var(--r-md);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--brand-100);
  aspect-ratio:16/9;
}
.cover-figure img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.cover-figure:hover img{transform:scale(1.03)}

.prose{max-width:780px;font-size:16px;line-height:1.9;color:var(--ink-700)}
.prose h2{
  font-size:28px;
  line-height:1.4;
  margin:40px 0 16px;
  padding-left:14px;
  position:relative;
}
.prose h2::before{
  content:"";
  position:absolute;left:0;top:8px;bottom:8px;
  width:3px;border-radius:3px;background:var(--brand-600);
}
.prose h3{font-size:20px;line-height:1.5;margin:28px 0 12px}
.prose p{margin:0 0 18px}
.prose a{background-image:linear-gradient(var(--brand-100),var(--brand-100));background-repeat:no-repeat;background-size:0% 6px;background-position:0 92%;transition:background-size .25s ease}
.prose a:hover{background-size:100% 6px;color:var(--brand-700)}
.prose ul,.prose ol{margin:0 0 20px;padding-left:22px;list-style:revert}
.prose li{margin-bottom:8px}
.prose blockquote{
  margin:22px 0;
  padding:18px 22px;
  background:var(--brand-100);
  border-left:4px solid var(--brand-600);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--ink-700);
}
.prose img{border-radius:12px;margin:22px 0}
.prose table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;border:1px solid var(--line);border-radius:var(--r-sm);overflow:hidden}
.prose th,.prose td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.prose th{background:var(--brand-100);color:var(--ink-900);font-weight:700}
.prose tbody tr:nth-child(even){background:#FAFCFF}
.prose code{background:#F1F4FA;border-radius:6px;padding:2px 6px;font-size:14px;color:var(--brand-700)}

.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:34px 0 0}
.tag{
  display:inline-flex;align-items:center;
  height:26px;padding:0 10px;
  font-size:13px;
  border-radius:6px;
  background:var(--brand-100);
  color:var(--brand-600);
  transition:background-color .22s ease,color .22s ease,transform .22s ease;
}
.tag:hover{background:var(--brand-600);color:#fff;transform:translateY(-1px)}

.cta-bar{
  max-width:780px;
  margin:36px 0 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  background:linear-gradient(90deg,var(--brand-100),#F7FAFF);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:20px 22px;
}
.cta-bar strong{display:block;color:var(--ink-900);font-size:17px;font-weight:700}
.cta-bar span{font-size:14px;color:var(--ink-500)}
.cta-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}

.empty-card{
  border:1px dashed #c9d3e4;
  border-radius:var(--r-md);
  background:#FAFCFF;
  padding:42px 24px;
  text-align:center;
}
.empty-card h2{font-size:22px;margin-bottom:10px}
.empty-card p{color:var(--ink-500);margin-bottom:20px}

/* --- related --- */
.related{margin-top:44px}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:20px;
}
.section-head h2{font-size:24px}
.section-head .more{font-size:14px;font-weight:600}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.mini-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--l1);
  padding:20px;
  display:flex;
  flex-direction:column;
  gap:10px;
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--l3);border-color:#d5deee}
.mini-card h3{font-size:17px;line-height:1.55}
.mini-card:hover h3{color:var(--brand-600)}
.mini-meta{font-size:13px;color:var(--ink-500);display:flex;gap:10px;align-items:center}

/* --- sidebar --- */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
.side-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--l1);
  padding:20px;
}
.side-card h3{
  font-size:15px;
  margin-bottom:12px;
  padding-left:10px;
  position:relative;
}
.side-card h3::before{
  content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;border-radius:3px;background:var(--brand-600);
}
.side-list li+li{margin-top:4px}
.side-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:9px 8px;
  border-radius:8px;
  font-size:14px;
  color:var(--ink-700);
  transition:color .22s ease,background-color .22s ease,transform .22s ease;
}
.side-list a:hover{color:var(--brand-600);background:var(--brand-100);transform:translateX(2px)}
.side-list .arrow{color:var(--accent);font-size:12px}

/* ============ footer ============ */
.site-footer{
  margin-top:var(--sec);
  background:var(--footer);
  color:rgba(255,255,255,.65);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:44px;
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  color:#fff;font-weight:700;font-size:17px;margin-bottom:14px;
}
.footer-about{font-size:14px;line-height:1.9;color:rgba(255,255,255,.65);margin:0;max-width:320px}
.footer-col h3{font-size:14px;font-weight:700;color:rgba(255,255,255,.9);margin-bottom:16px}
.footer-col li+li{margin-top:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.65)}
.footer-col a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ============ responsive ============ */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-side{position:static;flex-direction:row;flex-wrap:wrap}
  .article-side .side-card{flex:1 1 260px}
}
@media (max-width:991px){
  :root{--sec:72px}
  .nav-toggle{display:inline-flex}
  .nav-body{
    display:none;
    position:absolute;
    left:20px;right:20px;top:calc(100% + 8px);
    flex-direction:column;
    align-items:stretch;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--l2);
    padding:16px;
    gap:14px;
  }
  .nav-body.open{display:flex}
  .nav-links{flex-direction:column;align-items:stretch;gap:8px}
  .nav-pill{justify-content:flex-start;height:44px}
  .nav-actions{justify-content:space-between}
  .article-head h1{font-size:32px}
  .article-main{padding:32px 26px 36px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  :root{--sec:48px}
  .container{padding:0 16px}
  .nav-body{left:16px;right:16px}
  .article-wrap{padding:24px 0 var(--sec)}
  .article-head h1{font-size:28px}
  .prose h2{font-size:22px}
  .prose h3{font-size:18px}
  .article-main{padding:24px 20px 28px}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .cta-bar{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
  .footer-about{max-width:none}
}

/* roulang page: category2 */
:root{
  --brand-700:#14479E;
  --brand-600:#1B5FD0;
  --brand-500:#2E75E8;
  --brand-100:#E3EDFB;
  --accent:#F2864A;
  --ink-900:#101828;
  --ink-700:#344054;
  --ink-500:#667085;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E4E9F2;
  --footer:#0E1E3A;
  --r-xl:20px;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --l1:0 2px 8px rgba(23,43,77,.06);
  --l2:0 8px 24px rgba(23,43,77,.08);
  --l3:0 14px 32px rgba(23,43,77,.12);
  --t:.22s ease;
  --sec:96px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-700);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color var(--t),background var(--t);}
a:hover{color:var(--brand-700);}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink-900);margin:0;font-weight:700;letter-spacing:-.01em;}
h1{font-size:40px;line-height:1.2;}
h2{font-size:28px;line-height:1.36;}
h3{font-size:20px;line-height:1.5;font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1400px){.container{max-width:1240px;}}
main section{padding:var(--sec) 0;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  padding:12px 0 0;
  background:linear-gradient(180deg,rgba(244,247,252,.96) 60%,rgba(244,247,252,.72));
}
.nav-card{
  display:flex;align-items:center;gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--l2);
  padding:10px 14px;
  transition:box-shadow var(--t),padding var(--t);
}
.site-header.is-scrolled .nav-card{box-shadow:0 14px 32px rgba(23,43,77,.14);padding:8px 14px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink-900);font-weight:700;font-size:17px;white-space:nowrap;}
.brand:hover{color:var(--brand-700);}
.brand-mark{
  width:34px;height:34px;border-radius:var(--r-sm);
  background:var(--brand-600);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;letter-spacing:0;
  box-shadow:0 6px 14px rgba(27,95,208,.28);
}
.brand-sub{
  display:block;font-size:12px;font-weight:500;color:var(--ink-500);
  line-height:1.2;letter-spacing:.04em;
}
.nav-toggle{
  margin-left:auto;display:none;
  width:40px;height:40px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;color:var(--brand-700);
  align-items:center;justify-content:center;cursor:pointer;
  transition:background var(--t),box-shadow var(--t);
}
.nav-toggle:hover{background:var(--brand-100);box-shadow:var(--l1);}
.nav-body{display:flex;align-items:center;justify-content:space-between;gap:16px;flex:1;min-width:0;}
.nav-links{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.nav-pill{
  display:inline-flex;align-items:center;height:40px;padding:0 15px;
  border-radius:var(--r-sm);background:var(--brand-100);
  color:var(--brand-700);font-size:14px;font-weight:600;
  border:1px solid transparent;
  transition:background var(--t),color var(--t),box-shadow var(--t),transform var(--t);
}
.nav-pill:hover{background:#fff;box-shadow:var(--l1);color:var(--brand-700);transform:translateY(-1px);}
.nav-pill.active{background:var(--brand-600);color:#fff;box-shadow:0 8px 18px rgba(27,95,208,.26);}
.nav-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);background:#fff;color:var(--ink-700);
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:background var(--t),color var(--t),box-shadow var(--t);
}
.icon-btn:hover{background:var(--brand-100);color:var(--brand-700);box-shadow:var(--l1);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background var(--t),color var(--t),box-shadow var(--t),transform var(--t),border-color var(--t);
}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 8px 18px rgba(27,95,208,.22);}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px);box-shadow:var(--l2);}
.btn-outline{background:#fff;color:var(--brand-700);border-color:var(--line);}
.btn-outline:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-700);transform:translateY(-2px);box-shadow:var(--l1);}
.btn-ghost{background:var(--brand-100);color:var(--brand-700);}
.btn-ghost:hover{background:#fff;box-shadow:var(--l1);color:var(--brand-700);}

/* ============ 通用板块 ============ */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px;flex-wrap:wrap;}
.section-head p{color:var(--ink-500);font-size:15px;max-width:620px;margin-top:8px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-700);
  background:var(--brand-100);border-radius:6px;
  padding:5px 10px;margin-bottom:14px;
}
.eyebrow::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--accent);}
.link-more{font-size:15px;font-weight:600;color:var(--brand-600);}
.link-more:hover{color:var(--brand-700);}
.text-muted{color:var(--ink-500);font-size:14px;}

/* ============ 面包屑 ============ */
.crumb{padding:22px 0 0;font-size:14px;color:var(--ink-500);}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li+li::before{content:"/";color:var(--line);}
.crumb a{color:var(--ink-500);}
.crumb a:hover{color:var(--brand-600);}
.crumb .current{color:var(--brand-600);font-weight:600;}

/* ============ Hero ============ */
.page-hero{padding:28px 0 var(--sec);}
.hero-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-xl);box-shadow:var(--l2);
  padding:48px;
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.hero-copy h1{margin-bottom:12px;}
.hero-lead{font-size:17px;color:var(--ink-700);max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 22px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:14px;color:var(--ink-500);font-size:14px;}
.hero-tags span{position:relative;padding-left:14px;}
.hero-tags span::before{content:"";position:absolute;left:0;top:50%;width:4px;height:4px;border-radius:50%;background:var(--accent);transform:translateY(-50%);}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:4/3;background:var(--brand-100);}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{
  content:"";position:absolute;inset:auto 0 0 0;height:36%;
  background:linear-gradient(180deg,rgba(27,95,208,0) 0%,rgba(27,95,208,.12) 100%);
  pointer-events:none;
}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;
  margin-top:32px;padding-top:26px;border-top:1px solid var(--line);
}
.hero-stats .num{font-size:26px;font-weight:700;color:var(--brand-700);line-height:1.2;}
.hero-stats .lbl{font-size:14px;color:var(--ink-500);}

/* ============ 步骤总览 ============ */
.step-track{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0;position:relative;}
.step-node{position:relative;padding:0 14px 0 0;}
.step-node::after{
  content:"";position:absolute;top:22px;left:52px;right:0;height:2px;
  background:linear-gradient(90deg,var(--brand-100),var(--brand-500));
}
.step-node:last-child::after{display:none;}
.step-badge{
  width:44px;height:44px;border-radius:50%;
  background:#fff;border:2px solid var(--brand-500);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;position:relative;z-index:1;
  transition:background var(--t),color var(--t),transform var(--t),box-shadow var(--t);
}
.step-node:hover .step-badge{background:var(--brand-600);border-color:var(--brand-600);color:#fff;transform:translateY(-3px);box-shadow:var(--l2);}
.step-node h3{margin:16px 0 6px;font-size:17px;}
.step-node p{font-size:14px;color:var(--ink-500);}

/* ============ 步骤详解 ============ */
.detail-list{display:flex;flex-direction:column;gap:20px;}
.detail-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--l1);padding:28px;
  display:grid;grid-template-columns:96px 1fr;gap:26px;
  transition:box-shadow var(--t),transform var(--t),border-color var(--t);
}
.detail-card:hover{box-shadow:var(--l3);transform:translateY(-3px);border-color:#D6E2F7;}
.detail-index{
  font-size:34px;font-weight:700;color:var(--brand-600);
  line-height:1;letter-spacing:-.02em;position:relative;padding-left:16px;
}
.detail-index::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:2px;background:var(--accent);}
.detail-index em{display:block;font-size:12px;font-style:normal;color:var(--ink-500);font-weight:600;margin-top:10px;letter-spacing:.08em;}
.detail-body h3{margin-bottom:10px;}
.detail-body p{font-size:15px;line-height:1.9;}
.detail-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 22px;margin-top:16px;}
.detail-points li{
  position:relative;padding-left:20px;font-size:14px;color:var(--ink-700);
}
.detail-points li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:2px;
  background:var(--brand-100);border:2px solid var(--brand-500);
}
.detail-note{
  margin-top:16px;background:var(--brand-100);border-left:4px solid var(--brand-600);
  border-radius:0 var(--r-sm) var(--r-sm) 0;padding:12px 16px;font-size:14px;color:var(--brand-700);
}

/* ============ 准备清单（图文） ============ */
.prep-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
.prep-media{border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/11;box-shadow:var(--l2);background:var(--brand-100);}
.prep-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.prep-media:hover img{transform:scale(1.03);}
.prep-list{display:flex;flex-direction:column;gap:14px;margin-top:24px;}
.prep-item{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:16px 18px;box-shadow:var(--l1);
  transition:box-shadow var(--t),transform var(--t),border-color var(--t);
}
.prep-item:hover{box-shadow:var(--l2);transform:translateY(-2px);border-color:#D6E2F7;}
.prep-item i{color:var(--brand-600);font-size:16px;margin-top:6px;}
.prep-item strong{display:block;color:var(--ink-900);font-size:15px;margin-bottom:2px;}
.prep-item span{font-size:14px;color:var(--ink-500);}

/* ============ 要点对照行 ============ */
.compare-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--l2);overflow:hidden;
}
.compare-head,.compare-row{display:grid;grid-template-columns:1.1fr 1.4fr 1.4fr;gap:0;}
.compare-head{background:var(--brand-100);}
.compare-head div{padding:16px 22px;font-size:14px;font-weight:700;color:var(--brand-700);}
.compare-row{border-top:1px solid var(--line);transition:background var(--t);}
.compare-row:hover{background:#FAFCFF;}
.compare-row div{padding:18px 22px;font-size:14.5px;}
.compare-row .col-key{font-weight:600;color:var(--ink-900);}
.compare-row .col-right{color:var(--ink-500);}
.compare-row .col-right i{color:var(--accent);margin-right:6px;font-size:12px;}

/* ============ 相关入口紧凑卡 ============ */
.mini-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.mini-card{
  display:flex;gap:16px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px 22px;box-shadow:var(--l1);color:var(--ink-900);
  transition:box-shadow var(--t),transform var(--t),border-color var(--t);
}
.mini-card:hover{box-shadow:var(--l3);transform:translateY(-3px);border-color:#D6E2F7;color:var(--brand-700);}
.mini-icon{
  width:40px;height:40px;border-radius:var(--r-sm);flex:0 0 40px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-100);color:var(--brand-600);font-size:16px;
}
.mini-card strong{display:block;font-size:16px;margin-bottom:2px;}
.mini-card span{font-size:14px;color:var(--ink-500);}
.mini-card:hover span{color:var(--ink-700);}

/* ============ CTA 条 ============ */
.cta-band{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);
  box-shadow:var(--l2);padding:40px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:24px;margin-bottom:8px;}
.cta-band p{color:var(--ink-500);font-size:15px;max-width:620px;}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.share-btn{
  width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:background var(--t),box-shadow var(--t),transform var(--t);
}
.share-btn:hover{background:var(--brand-100);box-shadow:var(--l1);transform:translateY(-2px);}

/* ============ 页脚 ============ */
.site-footer{background:var(--footer);color:rgba(255,255,255,.65);margin-top:var(--sec);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:14px;}
.footer-about{font-size:14px;line-height:1.85;max-width:320px;}
.footer-col h3{color:rgba(255,255,255,.9);font-size:14px;font-weight:700;margin-bottom:16px;}
.footer-col li+li{margin-top:10px;}
.footer-col a{color:rgba(255,255,255,.65);font-size:14px;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.55);
}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .hero-card{padding:36px;gap:32px;}
}
@media (max-width:991px){
  :root{--sec:72px;}
  .nav-toggle{display:inline-flex;}
  .nav-body{
    display:none;position:absolute;left:20px;right:20px;top:calc(100% + 10px);
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--l3);padding:18px;flex-direction:column;align-items:stretch;gap:16px;
  }
  .nav-card{position:relative;}
  .nav-card.open .nav-body{display:flex;}
  .nav-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;}
  .nav-pill{justify-content:center;}
  .nav-actions{justify-content:space-between;}
  .hero-card{grid-template-columns:1fr;padding:32px;}
  .hero-media{order:-1;}
  .step-track{grid-template-columns:1fr;gap:24px;}
  .step-node{padding:0;}
  .step-node::after{display:none;}
  .prep-grid{grid-template-columns:1fr;gap:32px;}
  .prep-media{aspect-ratio:16/10;}
}
@media (max-width:767px){
  :root{--sec:48px;}
  h1{font-size:30px;}
  h2{font-size:23px;}
  .container{padding:0 16px;}
  .detail-card{grid-template-columns:1fr;gap:16px;padding:22px;}
  .detail-index{font-size:28px;}
  .detail-points{grid-template-columns:1fr;}
  .mini-grid{grid-template-columns:1fr;}
  .compare-head{display:none;}
  .compare-row{grid-template-columns:1fr;gap:0;padding:6px 0;}
  .compare-row div{padding:8px 20px;}
  .compare-row .col-key{background:#F8FBFF;border-radius:var(--r-sm) var(--r-sm) 0 0;padding-top:14px;}
  .cta-band{padding:28px 22px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-about{max-width:none;}
}
@media (max-width:520px){
  h1{font-size:26px;line-height:1.3;}
  .hero-actions .btn{width:100%;}
  .hero-stats{grid-template-columns:1fr;gap:12px;}
  .footer-grid{grid-template-columns:1fr;}
  .nav-links{grid-template-columns:1fr;}
}

/* roulang page: category1 */
:root{
  --brand-700:#14479E;
  --brand-600:#1B5FD0;
  --brand-500:#2E75E8;
  --brand-100:#E3EDFB;
  --accent:#F2864A;
  --ink-900:#101828;
  --ink-700:#344054;
  --ink-500:#667085;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E4E9F2;
  --footer:#0E1E3A;
  --l1:0 2px 8px rgba(23,43,77,.06);
  --l2:0 8px 24px rgba(23,43,77,.08);
  --l3:0 14px 32px rgba(23,43,77,.12);
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .22s ease,background .22s ease;}
a:hover{color:var(--brand-700);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:-.01em;line-height:1.3;}
p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1400px){.container{max-width:1240px;}}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  padding-top:12px;
  transition:padding .22s ease;
}
.site-header.is-scrolled{padding-top:6px;}
.nav-card{
  position:relative;
  display:flex;align-items:center;gap:16px;
  background:var(--surface);
  border-radius:18px;
  box-shadow:var(--l2);
  padding:10px 16px;
  transition:box-shadow .22s ease,padding .22s ease;
}
.site-header.is-scrolled .nav-card{box-shadow:var(--l3);padding:8px 16px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink-900);font-weight:700;font-size:17px;white-space:nowrap;}
.brand:hover{color:var(--brand-600);}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#fff;font-size:17px;font-weight:700;letter-spacing:.02em;
}
.brand-sub{display:block;font-size:11px;font-weight:500;color:var(--ink-500);letter-spacing:.04em;line-height:1.2;}
.nav-toggle{
  display:none;margin-left:auto;
  width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;color:var(--brand-600);align-items:center;justify-content:center;cursor:pointer;
  transition:background .22s ease,box-shadow .22s ease;
}
.nav-toggle:hover{background:var(--brand-100);box-shadow:var(--l1);}
.nav-body{display:flex;align-items:center;gap:16px;margin-left:auto;}
.nav-links{display:flex;align-items:center;gap:8px;}
.nav-pill{
  display:inline-flex;align-items:center;height:40px;padding:0 15px;
  border-radius:var(--r-sm);font-size:14px;font-weight:600;
  color:var(--brand-700);background:var(--brand-100);
  transition:background .22s ease,color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.nav-pill:hover{background:#fff;box-shadow:var(--l1);color:var(--brand-700);transform:translateY(-1px);}
.nav-pill.active{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(27,95,208,.24);}
.nav-pill.active:hover{background:var(--brand-700);}
.nav-actions{display:flex;align-items:center;gap:8px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background .22s ease,color .22s ease,box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px);box-shadow:var(--l2);}
.btn-outline{background:#fff;color:var(--brand-600);border-color:var(--line);}
.btn-outline:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-700);transform:translateY(-2px);}
.icon-btn{
  width:40px;height:40px;flex:0 0 40px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-100);color:var(--brand-700);border:none;cursor:pointer;
  transition:background .22s ease,box-shadow .22s ease,transform .22s ease;
}
.icon-btn:hover{background:#fff;box-shadow:var(--l1);transform:translateY(-1px);}

/* ---------- 面包屑 ---------- */
.crumbs{padding:26px 0 0;font-size:14px;color:var(--ink-500);}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumbs li::after{content:"/";margin-left:8px;color:#C6CFDE;}
.crumbs li:last-child::after{content:"";margin:0;}
.crumbs a{color:var(--ink-500);}
.crumbs a:hover{color:var(--brand-600);}
.crumbs .current{color:var(--brand-600);font-weight:600;}

/* ---------- 通用区块 ---------- */
.section{margin-top:96px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;}
.section-head h2{font-size:28px;}
.section-head .more{font-size:14px;font-weight:600;color:var(--brand-600);background-image:linear-gradient(var(--brand-100),var(--brand-100));background-size:0% 40%;background-position:0 88%;background-repeat:no-repeat;padding-bottom:2px;transition:background-size .22s ease;}
.section-head .more:hover{background-size:100% 40%;}
.section-lead{margin-top:10px;font-size:15px;color:var(--ink-500);max-width:640px;}

/* ---------- Hero ---------- */
.page-hero{margin-top:24px;}
.hero-card{
  background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--l2);
  padding:36px;display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 12px;
  border-radius:6px;background:var(--brand-100);color:var(--brand-700);
  font-size:13px;font-weight:600;letter-spacing:.02em;
}
.hero-copy h1{font-size:40px;line-height:1.2;margin-top:16px;}
.hero-sub{margin-top:12px;font-size:17px;color:var(--ink-500);}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px;}
.hero-tags{margin-top:20px;font-size:14px;color:var(--ink-500);}
.hero-tags span{color:var(--brand-600);font-weight:600;}
.hero-media{position:relative;border-radius:var(--r-md);overflow:hidden;box-shadow:var(--l1);}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-md);}
.hero-media::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:32%;
  background:linear-gradient(to top,rgba(27,95,208,.12),rgba(27,95,208,0));
  pointer-events:none;
}

/* ---------- 目录索引 ---------- */
.dir-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.dir-col{display:grid;gap:24px;align-content:start;}
.dir-group{
  background:var(--surface);border-radius:var(--r-md);box-shadow:var(--l1);
  padding:24px;transition:box-shadow .22s ease,transform .22s ease;
}
.dir-group:hover{box-shadow:var(--l2);transform:translateY(-3px);}
.dir-group h3{
  position:relative;font-size:16px;padding-left:12px;margin-bottom:6px;
}
.dir-group h3::before{
  content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;
  border-radius:2px;background:var(--brand-600);
}
.dir-list{margin-top:10px;}
.dir-list li a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:14px;line-height:2.2;color:var(--ink-700);
  transition:color .22s ease,transform .22s ease;
}
.dir-list li a .arrow{color:#C6CFDE;transition:color .22s ease,transform .22s ease;}
.dir-list li a:hover{color:var(--brand-600);transform:translateX(2px);}
.dir-list li a:hover .arrow{color:var(--accent);transform:translateX(2px);}

/* ---------- 图文卡片 ---------- */
.media-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.media-card{
  background:var(--surface);border-radius:var(--r-md);box-shadow:var(--l1);overflow:hidden;
  display:flex;flex-direction:column;
  transition:box-shadow .22s ease,transform .22s ease;
}
.media-card:hover{box-shadow:var(--l3);transform:translateY(-3px);}
.media-thumb{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--brand-100);}
.media-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.media-card:hover .media-thumb img{transform:scale(1.03);}
.badge{
  display:inline-flex;align-items:center;height:22px;padding:0 8px;
  border-radius:6px;background:var(--brand-100);color:var(--brand-700);
  font-size:12px;font-weight:600;line-height:1;
}
.badge-float{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);box-shadow:var(--l1);}
.media-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.media-body h3{font-size:19px;line-height:1.45;}
.media-card:hover .media-body h3{color:var(--brand-600);}
.media-body p{font-size:14.5px;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.media-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-500);padding-top:12px;border-top:1px solid var(--line);}
.media-meta .link{font-weight:600;color:var(--brand-600);}

/* ---------- 横向条目行 ---------- */
.entry-list{display:grid;gap:16px;}
.entry-row{
  position:relative;display:grid;grid-template-columns:60px 1fr auto;gap:20px;align-items:center;
  background:var(--surface);border-radius:var(--r-md);box-shadow:var(--l1);
  padding:22px 24px 22px 28px;overflow:hidden;
  transition:box-shadow .22s ease,transform .22s ease;
}
.entry-row::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--accent);opacity:.85;
}
.entry-row:hover{box-shadow:var(--l3);transform:translateY(-3px);}
.entry-num{font-size:24px;font-weight:700;color:var(--accent);letter-spacing:-.02em;font-family:Inter,system-ui,sans-serif;}
.entry-title{font-size:18px;font-weight:600;color:var(--ink-900);}
.entry-row:hover .entry-title{color:var(--brand-600);}
.entry-desc{margin-top:6px;font-size:14px;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.entry-side{display:flex;align-items:center;gap:12px;white-space:nowrap;font-size:13px;color:var(--ink-500);}

/* ---------- 优势数据条 ---------- */
.stat-strip{
  background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--l1);
  padding:28px 32px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.stat-item{padding-left:16px;border-left:3px solid var(--brand-100);}
.stat-item strong{display:block;font-size:26px;color:var(--brand-600);font-weight:700;letter-spacing:-.02em;line-height:1.2;}
.stat-item span{display:block;margin-top:6px;font-size:14px;color:var(--ink-500);}

/* ---------- FAQ ---------- */
.faq-wrap{background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--l1);padding:8px 24px;}
.faq-accordion .accordion-item{border:none;border-bottom:1px solid var(--line);background:transparent;}
.faq-accordion .accordion-item:last-child{border-bottom:none;}
.faq-accordion .accordion-button{
  position:relative;background:transparent;box-shadow:none;border:none;
  padding:22px 44px 22px 16px;font-size:17px;font-weight:600;color:var(--ink-900);
  transition:color .22s ease,padding .22s ease;
}
.faq-accordion .accordion-button::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:2px;
  background:var(--accent);opacity:0;transition:opacity .25s ease;
}
.faq-accordion .accordion-button::after{
  content:"";position:absolute;right:18px;top:50%;
  width:9px;height:9px;margin:0;background-image:none;
  border-right:2px solid var(--ink-500);border-bottom:2px solid var(--ink-500);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .25s ease,border-color .25s ease;
}
.faq-accordion .accordion-button:not(.collapsed){color:var(--brand-600);box-shadow:none;background:transparent;}
.faq-accordion .accordion-button:not(.collapsed)::before{opacity:1;}
.faq-accordion .accordion-button:not(.collapsed)::after{border-color:var(--brand-600);transform:translateY(-30%) rotate(-135deg);}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid var(--accent);outline-offset:-2px;}
.faq-accordion .accordion-body{padding:0 44px 24px 16px;font-size:15px;color:var(--ink-700);line-height:1.9;}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--l2);
  padding:32px 36px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  border-left:4px solid var(--brand-600);
}
.cta-band h2{font-size:24px;}
.cta-band p{margin-top:8px;font-size:14.5px;color:var(--ink-500);max-width:560px;}
.cta-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--footer);margin-top:96px;padding:64px 0 0;color:rgba(255,255,255,.65);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:44px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;}
.footer-about{margin-top:16px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.65);max-width:320px;}
.footer-col h3{font-size:14px;font-weight:700;color:rgba(255,255,255,.9);margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.65);transition:color .22s ease,transform .22s ease;display:inline-block;}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .hero-copy h1{font-size:34px;}
  .dir-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:991.98px){
  .nav-toggle{display:inline-flex;}
  .nav-body{
    display:none;position:absolute;left:0;right:0;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:14px;margin:0;
    background:#fff;border-radius:var(--r-md);box-shadow:var(--l3);padding:16px;
  }
  .nav-body.open{display:flex;}
  .nav-links{display:grid;grid-template-columns:1fr 1fr;gap:8px;}
  .nav-pill{justify-content:center;}
  .nav-actions{justify-content:space-between;}
  .hero-card{grid-template-columns:1fr;gap:28px;padding:28px;}
  .hero-media{order:-1;}
  .hero-copy h1{font-size:30px;}
  .section{margin-top:72px;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .cta-band{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767.98px){
  .dir-grid{grid-template-columns:1fr;}
  .media-grid{grid-template-columns:1fr;}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px;}
  .section-head h2{font-size:24px;}
  .entry-row{grid-template-columns:1fr;gap:10px;padding:20px;}
  .entry-side{justify-content:flex-start;}
  .hero-copy h1{font-size:28px;}
}
@media (max-width:575.98px){
  .container{padding:0 16px;}
  .hero-card{padding:20px;gap:20px;}
  .hero-copy h1{font-size:26px;line-height:1.32;}
  .hero-sub{font-size:15px;}
  .section{margin-top:48px;}
  .dir-group{padding:20px;}
  .media-body{padding:18px 20px 20px;}
  .stat-strip{grid-template-columns:1fr;padding:22px;}
  .faq-wrap{padding:4px 16px;}
  .faq-accordion .accordion-button{font-size:15.5px;padding:18px 40px 18px 14px;}
  .faq-accordion .accordion-body{padding:0 24px 20px 14px;}
  .cta-band{padding:24px 20px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category3 */
:root{
  --brand-700:#14479E;
  --brand-600:#1B5FD0;
  --brand-500:#2E75E8;
  --brand-100:#E3EDFB;
  --accent:#F2864A;
  --ink-900:#101828;
  --ink-700:#344054;
  --ink-500:#667085;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E4E9F2;
  --footer:#0E1E3A;
  --l1:0 2px 8px rgba(23,43,77,.06);
  --l2:0 8px 24px rgba(23,43,77,.08);
  --l3:0 14px 32px rgba(23,43,77,.12);
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --r-xs:6px;
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-600);text-decoration:none;transition:color .22s ease,background-size .22s ease}
a:hover{color:var(--brand-700)}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3{color:var(--ink-900);margin:0;font-weight:700;letter-spacing:-.01em}
h1{font-size:40px;line-height:1.2}
h2{font-size:28px;line-height:1.38}
h3{font-size:20px;line-height:1.5}
p{margin:0}
a:focus-visible,button:focus-visible,.nav-pill:focus-visible,.accordion-button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:10px}
.container{width:100%;max-width:1200px;margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px}
@media (min-width:1400px){.container{max-width:1240px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  padding-top:12px;
  background:linear-gradient(to bottom,rgba(244,247,252,.96),rgba(244,247,252,.72));
  backdrop-filter:blur(8px);
}
.nav-card{
  display:flex;align-items:center;gap:18px;
  background:var(--surface);
  border:1px solid rgba(228,233,242,.95);
  border-radius:18px;
  box-shadow:var(--l2);
  padding:12px 18px;
  transition:padding .22s ease,box-shadow .22s ease;
}
.site-header.scrolled .nav-card{padding:8px 18px;box-shadow:0 10px 28px rgba(23,43,77,.12)}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink-900);font-size:18px;font-weight:700;line-height:1.2}
.brand:hover{color:var(--brand-700)}
.brand-mark{
  width:34px;height:34px;flex:none;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#fff;font-size:16px;font-weight:700;letter-spacing:0;
}
.brand-sub{display:block;font-size:11px;font-weight:500;color:var(--ink-500);letter-spacing:.04em;line-height:1.4}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  background:var(--brand-100);color:var(--brand-700);place-items:center;
}
.nav-body{display:flex;align-items:center;gap:16px;flex:1;justify-content:space-between;margin-left:8px}
.nav-links{display:flex;gap:8px;flex-wrap:wrap}
.nav-pill{
  height:40px;display:inline-flex;align-items:center;padding:0 14px;
  border-radius:10px;background:var(--brand-100);color:var(--brand-700);
  font-size:14px;font-weight:600;transition:all .22s ease;
}
.nav-pill:hover{background:#fff;box-shadow:var(--l1);color:var(--brand-700);transform:translateY(-1px)}
.nav-pill.active{background:var(--brand-600);color:#fff;box-shadow:var(--l1)}
.nav-pill.active:hover{background:var(--brand-700);color:#fff}
.nav-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--brand-600);display:grid;place-items:center;
  transition:all .22s ease;
}
.icon-btn:hover{background:var(--brand-100);border-color:var(--brand-500);transform:translateY(-2px);box-shadow:var(--l1);color:var(--brand-700)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:all .22s ease;text-decoration:none;
}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover,.btn-primary:focus{background:var(--brand-700);color:#fff;transform:translateY(-2px);box-shadow:var(--l2)}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:var(--line)}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-700);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}

/* ---------- layout ---------- */
main > section{padding-top:var(--sec)}
.section-tight{padding-top:28px !important}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.sec-head p{margin-top:10px;font-size:15px;color:var(--ink-500);max-width:680px}
.more-link{font-size:14px;font-weight:600;position:relative}
.more-link:hover{color:var(--brand-700)}

/* ---------- breadcrumbs ---------- */
.crumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;color:var(--ink-500);padding-top:26px}
.crumbs a{color:var(--ink-500)}
.crumbs a:hover{color:var(--brand-600)}
.crumbs .sep{color:#c3cbdb}
.crumbs .cur{color:var(--brand-600);font-weight:600}

/* ---------- hero ---------- */
.hero-card{
  background:var(--surface);border:1px solid rgba(228,233,242,.9);
  border-radius:var(--r-lg);box-shadow:var(--l2);
  padding:46px;
  display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center;
}
.hero-copy .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);border-radius:8px;padding:6px 12px;margin-bottom:18px;
}
.hero-copy h1{margin-bottom:14px}
.hero-copy .lead{font-size:17px;line-height:1.75;color:var(--ink-700);max-width:520px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.kw-row{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap;font-size:14px;color:var(--ink-500)}
.kw-row span{display:inline-flex;align-items:center;gap:14px}
.kw-row span::after{content:"·";color:#c3cbdb}
.kw-row span:last-child::after{content:""}
.hero-side{background:var(--brand-100);border:1px solid #d5e3fa;border-radius:var(--r-md);padding:26px}
.hero-side h2{font-size:17px;margin-bottom:6px}
.hero-side .side-note{font-size:13px;color:var(--ink-500);margin-bottom:8px}
.hero-side ol{counter-reset:q}
.hero-side li{
  counter-increment:q;position:relative;padding:15px 0 15px 46px;
  font-size:15px;color:var(--ink-700);border-bottom:1px dashed #cee0f8;line-height:1.7;
}
.hero-side li:last-child{border-bottom:0;padding-bottom:4px}
.hero-side li::before{
  content:counter(q,decimal-leading-zero);position:absolute;left:0;top:15px;
  width:32px;height:32px;border-radius:9px;background:#fff;color:var(--brand-600);
  display:grid;place-items:center;font-size:13px;font-weight:700;box-shadow:var(--l1);
}

/* ---------- qa main ---------- */
.panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--l1);padding:34px;
}
.panel > h3{margin-top:34px}
.panel > h3:first-of-type{margin-top:0}
.panel p{margin-top:12px;font-size:15.5px;line-height:1.9}
.panel .lead-line{font-size:16px;color:var(--ink-700)}
.quote{
  margin-top:26px;padding:18px 22px;border-left:4px solid var(--brand-600);
  background:var(--brand-100);border-radius:0 12px 12px 0;
  font-size:15px;color:var(--ink-700);line-height:1.85;
}
.checklist{margin-top:20px;display:grid;gap:12px}
.checklist li{position:relative;padding-left:32px;font-size:15px;color:var(--ink-700)}
.checklist li::before{
  content:"";position:absolute;left:0;top:5px;width:20px;height:20px;
  border-radius:6px;background:var(--brand-100);border:1px solid #cfe0fa;
}
.checklist li::after{
  content:"";position:absolute;left:6px;top:10px;width:8px;height:4px;
  border-left:2px solid var(--brand-600);border-bottom:2px solid var(--brand-600);
  transform:rotate(-45deg);
}

/* ---------- faq ---------- */
.faq-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--l1);padding:6px 24px 18px;position:sticky;top:104px;
}
.faq-panel .panel-title{
  font-size:17px;font-weight:700;color:var(--ink-900);
  padding:20px 0 14px;border-bottom:1px solid var(--line);
}
.faq-panel .panel-sub{font-size:13px;color:var(--ink-500);padding:12px 0 4px}
.accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
.accordion-item:last-child{border-bottom:0}
.accordion-button{
  position:relative;background:transparent;box-shadow:none;
  padding:16px 34px 16px 14px;font-size:15px;font-weight:600;color:var(--ink-900);
  line-height:1.6;border-radius:0 !important;
}
.accordion-button:not(.collapsed){color:var(--brand-600);background:transparent;box-shadow:none}
.accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:15px;bottom:15px;width:3px;
  border-radius:3px;background:var(--accent);
}
.accordion-button::after{
  content:"";position:absolute;right:8px;top:50%;width:14px;height:14px;
  margin:0;transform:translateY(-50%);
  background-image:linear-gradient(var(--ink-500),var(--ink-500)),linear-gradient(var(--ink-500),var(--ink-500));
  background-size:14px 2px,2px 14px;background-position:center,center;background-repeat:no-repeat;
  transition:background-size .25s ease,background-image .25s ease;
}
.accordion-button:not(.collapsed)::after{
  background-image:linear-gradient(var(--brand-600),var(--brand-600)),linear-gradient(var(--brand-600),var(--brand-600));
  background-size:14px 2px,0 14px;
}
.accordion-button:focus{box-shadow:none;border-color:transparent}
.accordion-body{padding:0 30px 18px 14px;font-size:14.5px;line-height:1.85;color:var(--ink-500)}

/* ---------- tips ---------- */
.tips-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.tip{
  display:flex;gap:14px;padding:20px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--l1);
  transition:all .22s ease;
}
.tip:hover{transform:translateY(-3px);box-shadow:var(--l3);border-color:#cfe0fa}
.tip-icon{
  width:40px;height:40px;flex:none;border-radius:12px;background:var(--brand-100);
  color:var(--brand-600);display:grid;place-items:center;
}
.tip h3{font-size:16px;font-weight:600;margin-bottom:4px}
.tip p{font-size:14px;line-height:1.75;color:var(--ink-500);margin:0}

/* ---------- entry cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.entry-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--l1);
  overflow:hidden;transition:all .22s ease;
}
.entry-card:hover{transform:translateY(-3px);box-shadow:var(--l3)}
.entry-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--brand-100)}
.entry-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.entry-card:hover .entry-thumb img{transform:scale(1.03)}
.entry-thumb .badge{position:absolute;left:14px;top:14px}
.badge{
  display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:var(--r-xs);
  background:var(--brand-100);color:var(--brand-600);font-size:12px;font-weight:600;
}
.entry-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.entry-body h3{font-size:18px;line-height:1.5}
.entry-body p{font-size:14px;line-height:1.75;color:var(--ink-500)}
.entry-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-500);
}
.entry-meta .go{color:var(--brand-600);font-weight:600}
.entry-card:hover .entry-body h3{color:var(--brand-600)}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--l2);padding:34px 36px;
  display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
}
.cta-band h2{font-size:22px;line-height:1.45}
.cta-band p{margin-top:8px;font-size:14.5px;color:var(--ink-500);max-width:620px}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--footer);color:rgba(255,255,255,.65);margin-top:var(--sec);padding:64px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:700;margin-bottom:14px}
.footer-about{font-size:14px;line-height:1.85;color:rgba(255,255,255,.65);max-width:330px}
.footer-col h3{font-size:14px;font-weight:700;color:rgba(255,255,255,.9);margin-bottom:14px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.65)}
.footer-col a:hover{color:#fff}
.footer-bottom{
  margin-top:42px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .nav-pill{padding:0 12px;font-size:13.5px}
  .hero-card{padding:38px;gap:34px}
}
@media (max-width:991.98px){
  :root{--sec:72px}
  h1{font-size:32px}
  h2{font-size:24px}
  .nav-toggle{display:grid;margin-left:auto}
  .nav-card{flex-wrap:wrap;padding:10px 14px}
  .nav-body{display:none;width:100%;flex-direction:column;align-items:stretch;gap:14px;margin:8px 0 4px}
  .nav-body.open{display:flex}
  .nav-links{display:grid;grid-template-columns:1fr 1fr;gap:8px}
  .nav-pill{justify-content:center}
  .nav-actions{display:flex;gap:10px}
  .nav-actions .btn{flex:1}
  .hero-card{grid-template-columns:1fr;padding:30px}
  .faq-panel{position:static;top:auto}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .panel{padding:26px}
  .cta-band{padding:28px}
}
@media (max-width:767.98px){
  :root{--sec:56px}
  h1{font-size:28px;line-height:1.28}
  .crumbs{font-size:13px}
  .tips-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-copy .lead{font-size:16px}
  .kw-row{gap:10px}
}
@media (max-width:575.98px){
  :root{--sec:48px}
  .container{padding-left:16px;padding-right:16px}
  h1{font-size:26px}
  h2{font-size:22px}
  h3{font-size:18px}
  .card-grid{grid-template-columns:1fr}
  .hero-card{padding:24px;border-radius:var(--r-md)}
  .panel{padding:22px;border-radius:var(--r-md)}
  .faq-panel{padding:4px 18px 14px}
  .cta-band{padding:24px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .footer-grid{grid-template-columns:1fr}
  .entry-body{padding:20px}
}