/* roulang page: index */
:root{
  --ink-900:#0B1210;
  --brand-900:#10352D;
  --brand-700:#1F6B57;
  --accent:#C8F751;
  --accent-ink:#12210C;
  --warm:#E5623C;
  --paper:#FBF9F4;
  --surface:#FFFFFF;
  --line:#E3E0D6;
  --ink-500:#5A6663;
  --mist:#DCE6E1;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --container:1240px;
  --r-card:14px;
  --r-sub:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,18,16,.04);
  --sh-2:0 10px 24px rgba(16,53,45,.10);
  --sh-3:0 16px 40px rgba(11,18,16,.16);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sec:clamp(64px,8vw,120px);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,figure,ul,ol,dl{margin:0}
ul,ol{padding:0;list-style:none}
input,textarea,select{font:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--sec) 0}
.section--tight{padding-top:0}
.section-mist{background:var(--mist)}
.section-dark{background:var(--ink-900);color:#fff}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,249,244,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(251,249,244,.97)}
.nav-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:20px;
  min-height:76px;
  transition:min-height .22s var(--ease);
}
.site-header.is-scrolled .nav-inner{min-height:64px}
.nav-side{display:flex;align-items:center;gap:32px}
.nav-side--right{justify-content:flex-end}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ink-900);
  padding:6px 2px;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--brand-900);transition:width .22s var(--ease);
}
.nav-link:hover{color:var(--brand-700)}
.nav-link:hover::after{width:18px}
.nav-link.active{color:var(--brand-900)}
.nav-link.active::after{width:18px}

.logo{display:flex;align-items:center;gap:10px;justify-self:center}
.logo-mark{width:32px;height:32px;flex:0 0 32px}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-main{
  font-family:var(--font-serif);font-size:17px;font-weight:800;
  letter-spacing:.02em;color:var(--brand-900);
}
.logo-sub{
  font-size:11px;letter-spacing:.16em;color:var(--ink-500);
}

.menu-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);
  border-radius:var(--r-sub);align-items:center;justify-content:center;
  background:var(--surface);
}
.menu-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--brand-900);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--brand-900);
  transition:transform .22s var(--ease);
}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.menu-toggle.is-open span{background:transparent}
.menu-toggle.is-open span::before{transform:translateY(6px) rotate(45deg)}
.menu-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg)}

.mobile-panel{
  display:none;
  border-top:1px solid var(--line);
  background:var(--paper);
  padding:8px 24px 24px;
}
.mobile-panel.is-open{display:block}
.mobile-nav a{
  display:block;font-size:18px;line-height:56px;border-bottom:1px solid var(--line);
  color:var(--ink-900);
}
.mobile-nav a.active{color:var(--brand-900);font-weight:600}
.mobile-panel .btn{margin-top:20px;width:100%;justify-content:center}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:500;
  padding:13px 26px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  will-change:transform;
}
.btn-primary{
  background:var(--accent);color:var(--accent-ink);
  border:1px solid var(--accent);border-radius:var(--r-pill);
  box-shadow:var(--sh-1);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-ghost{
  background:transparent;color:var(--brand-900);
  border:1px solid var(--brand-900);border-radius:var(--r-sub);
}
.btn-ghost:hover{transform:translateY(-2px);background:rgba(16,53,45,.06)}
.btn-ghost:active{transform:translateY(0)}
.btn-dark{
  background:var(--brand-900);color:#fff;border:1px solid var(--brand-900);
  border-radius:var(--r-pill);
}
.btn-dark:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.btn-block{width:100%;justify-content:center}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:500;
  color:var(--brand-700);position:relative;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;
  background:var(--brand-700);transition:width .22s var(--ease);
}
.text-link:hover::after{width:100%}
.text-link .arrow{transition:transform .22s var(--ease)}
.text-link:hover .arrow{transform:translateX(4px)}

.tag{
  display:inline-flex;align-items:center;
  background:var(--accent);color:var(--accent-ink);
  font-size:12px;letter-spacing:.08em;font-weight:500;
  padding:4px 10px;border-radius:var(--r-pill);line-height:1.5;
}
.tag-outline{
  background:transparent;color:var(--brand-900);
  border:1px solid var(--line);letter-spacing:.06em;
}
.tag-warm{background:transparent;color:var(--warm);border:1px solid rgba(229,98,60,.4);letter-spacing:.06em}

/* ---------- hero ---------- */
.hero{padding:clamp(48px,6vw,88px) 0 clamp(56px,7vw,96px)}
.hero-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.14em;color:var(--brand-700);
  text-transform:uppercase;margin-bottom:22px;
}
.hero-eyebrow::before{content:"";display:block;width:28px;height:1px;background:var(--brand-700)}
h1{
  font-family:var(--font-serif);font-weight:800;
  font-size:clamp(30px,5vw,60px);line-height:1.12;letter-spacing:-.02em;
  color:var(--ink-900);
}
.hero-lead{
  margin-top:22px;font-size:clamp(16px,1.3vw,18px);line-height:1.8;
  color:var(--ink-500);max-width:640px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-points{
  display:flex;flex-wrap:wrap;gap:0;margin-top:40px;
  border-top:1px solid var(--line);padding-top:22px;
}
.hero-points li{
  font-size:14px;color:var(--ink-500);padding-right:22px;margin-right:22px;
  border-right:1px solid var(--line);
}
.hero-points li:last-child{border-right:0;margin-right:0;padding-right:0}
.hero-points strong{
  display:block;font-family:var(--font-num);font-size:15px;font-weight:600;
  color:var(--brand-900);letter-spacing:.02em;
}
.hero-media{
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  background:var(--surface);box-shadow:var(--sh-1);
}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover}

/* ---------- section head ---------- */
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:clamp(36px,4vw,56px);
}
.section-head h2{
  font-family:var(--font-serif);font-weight:700;
  font-size:clamp(24px,3.2vw,40px);line-height:1.2;letter-spacing:-.02em;
}
.section-head p{margin-top:12px;color:var(--ink-500);font-size:15px;max-width:640px}
.section-kicker{
  display:block;font-size:12px;letter-spacing:.14em;color:var(--brand-700);
  margin-bottom:12px;
}

/* ---------- pain points ---------- */
.pain-list{border-top:1px solid var(--line)}
.pain-item{
  display:grid;grid-template-columns:88px 1fr;gap:24px;
  padding:28px 0;border-bottom:1px solid var(--line);
}
.pain-num{
  font-family:var(--font-num);font-size:15px;font-weight:600;
  color:var(--brand-700);letter-spacing:.06em;padding-top:4px;
}
.pain-body{max-width:720px}
.pain-body h3{font-family:var(--font-serif);font-size:20px;font-weight:700;line-height:1.35}
.pain-body p{margin-top:8px;color:var(--ink-500);font-size:15px}

/* ---------- features ---------- */
.feature{
  display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;
  padding:clamp(32px,4vw,52px) 0;
}
.feature + .feature{border-top:1px solid var(--line)}
.feature--reverse{grid-template-columns:7fr 5fr}
.feature--reverse .feature-media{order:2}
.feature--reverse .feature-body{order:1}
.feature-media{
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  background:var(--surface);box-shadow:var(--sh-1);
}
.feature-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.feature-body h3{
  font-family:var(--font-serif);font-size:clamp(20px,2vw,26px);font-weight:700;line-height:1.35;
  letter-spacing:-.01em;
}
.feature-body p{margin-top:14px;color:var(--ink-500);font-size:16px;max-width:760px}
.feature-body .text-link{margin-top:20px}
.feature-steps{margin-top:18px;display:grid;gap:10px}
.feature-steps li{
  position:relative;padding-left:22px;font-size:15px;color:var(--ink-500);
}
.feature-steps li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;
  border:2px solid var(--brand-700);border-radius:50%;
}

/* ---------- stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat{
  padding:36px 28px;border-left:1px solid var(--line);
}
.stat:first-child{border-left:0;padding-left:0}
.stat-value{
  font-family:var(--font-serif);font-weight:800;
  font-size:clamp(34px,4vw,52px);line-height:1.05;color:var(--brand-900);
  letter-spacing:-.02em;
}
.stat-value span{font-family:var(--font-num);font-size:.6em;margin-left:4px;font-weight:600}
.stat-label{margin-top:12px;font-size:13px;color:var(--ink-500);letter-spacing:.02em}

/* ---------- quotes ---------- */
.quotes{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.quote{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:34px;box-shadow:var(--sh-1);transition:box-shadow .24s var(--ease),transform .24s var(--ease),border-color .24s var(--ease);
}
.quote:nth-child(2){transform:translateY(24px)}
.quote:hover{box-shadow:var(--sh-2);border-color:var(--brand-900);transform:translateY(-3px)}
.quote:nth-child(2):hover{transform:translateY(21px)}
.quote p{
  font-family:var(--font-serif);font-size:clamp(18px,1.6vw,22px);line-height:1.6;
  color:var(--brand-900);letter-spacing:-.01em;
}
.quote-foot{display:flex;align-items:center;gap:12px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line)}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 40px;
  background:var(--mist);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-serif);font-size:16px;font-weight:700;color:var(--brand-900);
}
.quote-foot span{font-size:13px;color:var(--ink-500)}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
  display:flex;flex-direction:column;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--brand-900)}
.news-cover{display:block;overflow:hidden;background:var(--mist)}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .32s var(--ease)}
.news-card:hover .news-cover img{transform:scale(1.03)}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-title{
  font-family:var(--font-serif);font-size:20px;font-weight:700;line-height:1.4;
  letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-title a:hover{color:var(--brand-700)}
.news-desc{
  font-size:14px;color:var(--ink-500);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-date{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-family:var(--font-num);font-size:13px;color:var(--ink-500);letter-spacing:.02em;
}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;background:var(--surface);
}
.empty-state svg{width:48px;height:48px;margin:0 auto 18px}
.empty-state p{color:var(--ink-500);font-size:15px;margin-bottom:20px}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line);max-width:920px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:17px;font-weight:500;color:var(--ink-900);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-700)}
.faq-icon{
  position:relative;width:18px;height:18px;flex:0 0 18px;
  transition:transform .26s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-900);
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-answer{padding:0 0 24px;max-width:760px}
.faq-answer p{font-size:15px;line-height:1.8;color:var(--ink-500)}
.faq-answer p + p{margin-top:10px}
.faq-item[open] .faq-answer{animation:fadeUp .26s var(--ease) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;color:#fff;
  padding:clamp(64px,7vw,96px) 0;text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.cta-band::after{
  content:"";position:absolute;inset:0;background:rgba(11,18,16,.82);
}
.cta-inner{position:relative;z-index:2;max-width:720px;margin:0 auto}
.cta-inner h2{
  font-family:var(--font-serif);font-weight:700;
  font-size:clamp(24px,3.2vw,40px);line-height:1.2;letter-spacing:-.02em;
}
.cta-inner p{margin-top:16px;color:rgba(255,255,255,.72);font-size:16px}
.cta-inner .btn{margin-top:32px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:#fff;padding:clamp(56px,6vw,80px) 0 0}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:56px;border-top:1px solid rgba(255,255,255,.10);padding-top:56px;
}
.footer-brand .logo-mark path,.footer-brand .logo-mark circle{stroke:var(--accent)}
.footer-brand .logo-main{color:#fff}
.footer-brand .logo-sub{color:rgba(255,255,255,.55)}
.footer-desc{margin-top:18px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px}
.footer-col h3{
  font-size:13px;letter-spacing:.14em;color:rgba(255,255,255,.55);
  font-weight:500;margin-bottom:18px;
}
.footer-col li + li{margin-top:10px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.72);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.5)}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  :root{--sec:96px}
  .hero-grid{gap:40px}
}
@media (max-width:1023px){
  :root{--sec:80px}
  .nav-inner{grid-template-columns:1fr auto;min-height:68px}
  .nav-side{display:none}
  .logo{justify-self:start}
  .menu-toggle{display:inline-flex}
  .hero-grid{grid-template-columns:1fr}
  .hero-media{order:2}
  .feature,.feature--reverse{grid-template-columns:1fr;gap:28px}
  .feature--reverse .feature-media{order:0}
  .feature--reverse .feature-body{order:1}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat{border-left:1px solid var(--line);padding-left:28px}
  .stat:nth-child(odd){border-left:0;padding-left:0}
  .stat:nth-child(n+3){border-top:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  :root{--sec:64px}
  .container{padding:0 18px}
  .quotes{grid-template-columns:1fr;gap:20px}
  .quote:nth-child(2){transform:none}
  .quote:nth-child(2):hover{transform:translateY(-3px)}
  .news-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start}
  .hero-points li{border-right:0;margin-right:0;padding-right:0;padding-bottom:10px}
  .hero-points{flex-direction:column;gap:10px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
  .hero-actions .btn{width:100%;justify-content:center}
}
@media (max-width:519px){
  .pain-item{grid-template-columns:56px 1fr;gap:16px}
  .stats{grid-template-columns:1fr}
  .stat{border-left:0;padding-left:0;border-top:1px solid var(--line)}
  .stat:first-child{border-top:0}
  .quote{padding:24px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink-900:#0B1210;
  --brand-900:#10352D;
  --brand-700:#1F6B57;
  --accent:#C8F751;
  --accent-ink:#12210C;
  --warm:#E5623C;
  --paper:#FBF9F4;
  --surface:#FFFFFF;
  --line:#E3E0D6;
  --ink-500:#5A6663;
  --mist:#DCE6E1;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",SimSun,serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Inter","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --r-card:14px;
  --r-pill:999px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(11,18,16,.04);
  --sh-2:0 10px 24px rgba(16,53,45,.10);
  --sh-3:0 16px 40px rgba(11,18,16,.16);
  --ease:cubic-bezier(.22,.61,.36,1);
  --max:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:#1D2422;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{font-family:var(--serif);letter-spacing:-.02em;color:var(--brand-900);}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,249,244,.92);
  border-bottom:1px solid transparent;
  transition:background .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(251,249,244,.95);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom-color:var(--line);
  box-shadow:0 1px 2px rgba(11,18,16,.04);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:76px;transition:height .26s var(--ease);}
.site-header.is-scrolled .header-inner{height:64px;}
.nav-side{display:flex;align-items:center;gap:26px;flex:1 1 0;min-width:0;}
.nav-side--right{justify-content:flex-end;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:#31413C;
  padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--brand-900);border-radius:2px;transition:width .24s var(--ease);
}
.nav-link:hover{color:var(--brand-700);}
.nav-link:hover::after{width:18px;}
.nav-link.active{color:var(--brand-900);}
.nav-link.active::after{width:18px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{width:32px;height:32px;flex:0 0 32px;transition:transform .26s var(--ease);}
.logo:hover .logo-mark{transform:rotate(-6deg);}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-main{font-family:var(--serif);font-size:17px;font-weight:800;letter-spacing:.02em;color:var(--brand-900);}
.logo-sub{font-size:11px;letter-spacing:.16em;color:var(--ink-500);}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  border:1px solid var(--line);background:var(--surface);
}
.menu-toggle span{display:block;width:20px;height:2px;background:var(--brand-900);border-radius:2px;transition:transform .24s var(--ease),opacity .2s var(--ease);}
.menu-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle.is-open span:nth-child(2){opacity:0;}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-panel{
  display:none;border-top:1px solid var(--line);background:var(--paper);
  padding:8px 24px 24px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel a.m-p-link{
  display:block;font-size:18px;line-height:56px;border-bottom:1px solid var(--line);
  color:#243531;font-weight:500;
}
.mobile-panel a.m-p-link.active{color:var(--brand-900);}
.mobile-panel .m-cta{margin-top:20px;display:flex;width:100%;justify-content:center;}

/* ---------- buttons / tags ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);font-size:15px;font-weight:500;
  padding:13px 26px;border:1px solid transparent;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn-primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-ghost{background:transparent;color:var(--brand-900);border-color:var(--brand-900);}
.btn-ghost:hover{background:var(--brand-900);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-soft{background:var(--surface);color:var(--brand-900);border-color:var(--line);}
.btn-soft:hover{border-color:var(--brand-900);transform:translateY(-2px);box-shadow:var(--sh-1);}
.btn:active{transform:translateY(0);}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:500;color:var(--brand-700);
}
.text-link svg{transition:transform .22s var(--ease);}
.text-link:hover{color:var(--brand-900);}
.text-link:hover svg{transform:translateX(4px);}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;letter-spacing:.08em;padding:5px 12px;border-radius:var(--r-pill);
  border:1px solid var(--line);color:var(--ink-500);background:var(--surface);
}
.tag--accent{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);letter-spacing:.04em;font-weight:500;}

/* ---------- breadcrumb ---------- */
.breadcrumb{border-bottom:1px solid var(--line);background:var(--surface);}
.breadcrumb-inner{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);padding:14px 0;flex-wrap:wrap;}
.breadcrumb-inner a{color:var(--ink-500);}
.breadcrumb-inner a:hover{color:var(--brand-700);}
.breadcrumb-inner .sep{color:#B9B5A8;}
.breadcrumb-inner .current{max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- article head ---------- */
.article-head{max-width:760px;margin:0 auto;padding:64px 0 8px;}
.article-head .eyebrow{display:flex;align-items:center;gap:10px;margin-bottom:20px;flex-wrap:wrap;}
.article-head h1{
  font-size:clamp(28px,4vw,40px);line-height:1.24;font-weight:800;color:var(--ink-900);
  letter-spacing:-.02em;margin-bottom:22px;
}
.article-meta{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-500);padding-bottom:26px;border-bottom:1px solid var(--line);
}
.article-meta .dot{width:1px;height:12px;background:var(--line);}
.article-meta .num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- article body ---------- */
.article-body{max-width:720px;margin:0 auto;padding:40px 0 8px;font-size:17px;line-height:1.9;color:#202825;}
.article-body>*:first-child{margin-top:0;}
.article-body p{margin:0 0 1.25em;}
.article-body h2{
  font-size:clamp(22px,2.7vw,30px);line-height:1.3;font-weight:700;
  margin:2.2em 0 .75em;padding-left:16px;position:relative;color:var(--brand-900);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.34em;width:3px;height:20px;
  background:var(--accent);border-radius:2px;
}
.article-body h3{font-size:20px;line-height:1.35;font-weight:700;margin:1.9em 0 .55em;color:var(--ink-900);}
.article-body h4{font-size:17px;font-weight:700;margin:1.6em 0 .5em;color:var(--brand-900);}
.article-body ul,.article-body ol{margin:0 0 1.35em;padding-left:1.35em;}
.article-body ul li{list-style:disc;margin-bottom:.55em;padding-left:.2em;}
.article-body ol li{list-style:decimal;margin-bottom:.55em;padding-left:.2em;}
.article-body li::marker{color:var(--brand-700);}
.article-body a{color:var(--brand-700);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-900);}
.article-body strong{color:var(--ink-900);font-weight:600;}
.article-body blockquote{
  margin:1.7em 0;padding:18px 22px;background:var(--mist);
  border-left:3px solid var(--brand-900);border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:#22302C;font-family:var(--serif);font-size:17px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-card);margin:1.7em auto;box-shadow:var(--sh-1);}
.article-body figure{margin:1.7em 0;}
.article-body figure img{margin:0 auto .6em;}
.article-body figcaption{font-size:13px;color:var(--ink-500);text-align:center;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left;}
.article-body th{background:var(--mist);color:var(--brand-900);font-weight:600;}
.article-body code{
  font-family:var(--mono);font-size:14px;background:#F1EFE7;border-radius:6px;padding:2px 6px;color:#2C3A34;
}

/* ---------- empty state ---------- */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);background:var(--surface);
  padding:56px 28px;text-align:center;
}
.empty-state .empty-icon{
  width:48px;height:48px;margin:0 auto 18px;border-radius:50%;
  border:2px solid var(--accent);display:flex;align-items:center;justify-content:center;
}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--ink-500);font-size:15px;margin-bottom:22px;}

/* ---------- article foot ---------- */
.article-foot{max-width:720px;margin:0 auto;padding:34px 0 0;}
.foot-tags{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-bottom:26px;border-bottom:1px solid var(--line);}
.foot-tags .label{font-size:13px;color:var(--ink-500);letter-spacing:.06em;}
.foot-tags a.tag:hover{border-color:var(--brand-900);color:var(--brand-900);}
.foot-back{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 0 0;flex-wrap:wrap;}

/* ---------- related ---------- */
.related{padding:88px 0 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.2;font-weight:700;}
.section-head p{font-size:14px;color:var(--ink-500);margin-top:8px;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--brand-900);}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--mist);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-media .tag--accent{position:absolute;left:14px;top:14px;}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:20px;line-height:1.4;font-weight:700;color:var(--brand-900);}
.card-body p{font-size:14px;line-height:1.7;color:var(--ink-500);}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-500);padding-top:12px;}
.card-foot .date{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ---------- cta ---------- */
.cta{margin-top:104px;}
.cta-inner{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  padding:96px 32px;text-align:center;
}
.cta-inner::before{content:"";position:absolute;inset:0;background:rgba(11,18,16,.84);}
.cta-content{position:relative;z-index:1;max-width:620px;margin:0 auto;}
.cta-content h2{color:#fff;font-size:clamp(24px,3.2vw,38px);line-height:1.2;margin-bottom:16px;}
.cta-content p{color:rgba(255,255,255,.74);font-size:16px;line-height:1.8;margin-bottom:30px;}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;}
.cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5);}
.cta .btn-ghost:hover{background:#fff;color:var(--brand-900);border-color:#fff;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);margin-top:110px;border-top:1px solid rgba(255,255,255,.10);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:72px 0 48px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand .logo-main{color:#fff;}
.footer-brand .logo-sub{color:rgba(255,255,255,.55);}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:320px;}
.footer-col h3{font-family:var(--sans);font-size:13px;font-weight:600;letter-spacing:.14em;color:#fff;margin-bottom:18px;}
.footer-col ul li{margin-bottom:12px;font-size:14px;}
.footer-col a{color:rgba(255,255,255,.72);}
.footer-col a:hover{color:var(--accent);}
.footer-col span{color:rgba(255,255,255,.66);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:20px 0 26px;border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .32s var(--ease),transform .32s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .article-head{padding-top:56px;}
  .related{padding-top:80px;}
}
@media (max-width:1023px){
  .nav-side{display:none;}
  .menu-toggle{display:inline-flex;}
  .header-inner{height:68px;}
  .site-header.is-scrolled .header-inner{height:62px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;padding:56px 0 36px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{padding:76px 26px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .mobile-panel{padding:8px 18px 22px;}
  .article-head{padding:40px 0 4px;}
  .article-body{font-size:16px;line-height:1.85;padding-top:30px;}
  .breadcrumb-inner .current{max-width:220px;}
  .related{padding-top:64px;}
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .cta{margin-top:72px;}
  .cta-inner{padding:60px 20px;border-radius:12px;}
  .site-footer{margin-top:76px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-bottom{justify-content:flex-start;}
}
@media (max-width:479px){
  .article-head h1{font-size:26px;}
  .btn{padding:12px 20px;font-size:14px;}
  .article-meta{gap:10px;}
  .foot-back{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  .reveal{opacity:1 !important;transform:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --ink-900:#0B1210;
  --brand-900:#10352D;
  --brand-700:#1F6B57;
  --accent:#C8F751;
  --accent-ink:#12210C;
  --warm:#E5623C;
  --paper:#FBF9F4;
  --surface:#FFFFFF;
  --line:#E3E0D6;
  --ink-500:#5A6663;
  --mist:#DCE6E1;

  --radius-card:14px;
  --radius-btn:999px;
  --radius-sm:10px;

  --shadow-card:0 1px 2px rgba(11,18,16,.04);
  --shadow-hover:0 10px 24px rgba(16,53,45,.10);
  --shadow-float:0 16px 40px rgba(11,18,16,.16);

  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1240px;

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
figure{margin:0;}
input{font-family:inherit;}

a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:4px;
}

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

/* ============ HEADER ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(251,249,244,.95);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color 220ms var(--ease),background 220ms var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:24px;
  height:76px;
  transition:height 220ms var(--ease);
}
.site-header.is-scrolled .header-inner{height:64px;}

.nav-side{display:flex;align-items:center;gap:30px;}
.nav-side--left{justify-content:flex-start;}
.nav-side--right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;
  padding:6px 0;
  color:var(--ink-900);
  transition:color 200ms var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:2px;
  background:var(--brand-900);
  transition:width 220ms var(--ease);
}
.nav-link:hover{color:var(--brand-700);}
.nav-link:hover::after{width:18px;}
.nav-link.active{color:var(--brand-900);font-weight:500;}
.nav-link.active::after{width:18px;}

.logo{
  display:flex;
  align-items:center;
  gap:10px;
  justify-self:center;
}
.logo-mark{width:32px;height:32px;flex:0 0 auto;}
.logo-text{display:flex;flex-direction:column;line-height:1.12;}
.logo-main{font-size:17px;font-weight:700;letter-spacing:.02em;color:var(--brand-900);}
.logo-sub{font-size:11px;letter-spacing:.08em;color:var(--ink-500);}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  cursor:pointer;
  transition:border-color 200ms var(--ease),background 200ms var(--ease);
}
.nav-toggle:hover{border-color:var(--brand-900);}
.nav-toggle .bars{position:relative;width:20px;height:14px;display:block;}
.nav-toggle .bars span{
  position:absolute;left:0;right:0;height:2px;background:var(--brand-900);
  transition:transform 220ms var(--ease),opacity 180ms var(--ease),top 220ms var(--ease);
}
.nav-toggle .bars span:nth-child(1){top:0;}
.nav-toggle .bars span:nth-child(2){top:6px;}
.nav-toggle .bars span:nth-child(3){top:12px;}
.nav-toggle.is-open .bars span:nth-child(1){top:6px;transform:rotate(45deg);}
.nav-toggle.is-open .bars span:nth-child(2){opacity:0;}
.nav-toggle.is-open .bars span:nth-child(3){top:6px;transform:rotate(-45deg);}

.mobile-panel{
  display:none;
  border-top:1px solid var(--line);
  background:var(--paper);
  padding:8px 0 24px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel a.m-link{
  display:block;
  font-size:18px;
  line-height:56px;
  border-bottom:1px solid var(--line);
  color:var(--ink-900);
  transition:color 200ms var(--ease),padding-left 200ms var(--ease);
}
.mobile-panel a.m-link:hover{color:var(--brand-700);padding-left:6px;}
.mobile-panel a.m-link.active{color:var(--brand-900);font-weight:500;}
.mobile-panel .m-cta{margin-top:20px;}
.mobile-panel .m-cta .btn{width:100%;justify-content:center;}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--radius-btn);
  padding:12px 24px;
  font-size:15px;
  font-weight:500;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),background 220ms var(--ease),color 220ms var(--ease),border-color 220ms var(--ease);
}
.btn-primary{background:var(--accent);color:var(--accent-ink);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(16,53,45,.18);}
.btn-outline{background:transparent;border-color:var(--brand-900);color:var(--brand-900);border-radius:var(--radius-sm);}
.btn-outline:hover{background:var(--brand-900);color:#fff;transform:translateY(-2px);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--brand-900);border-radius:var(--radius-sm);}
.btn-ghost:hover{border-color:var(--brand-900);transform:translateY(-2px);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-lg{padding:15px 30px;font-size:16px;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ============ GENERIC ============ */
.section{padding:96px 0;}
.section--tight{padding:64px 0;}
.section--mist{background:var(--mist);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.h2{
  font-family:var(--font-serif);
  font-size:clamp(24px,3.2vw,40px);
  line-height:1.2;
  font-weight:700;
  letter-spacing:-.02em;
}
.h3{
  font-family:var(--font-serif);
  font-size:clamp(20px,2vw,24px);
  line-height:1.35;
  font-weight:700;
}
.section-sub{color:var(--ink-500);font-size:16px;max-width:660px;margin-top:14px;line-height:1.8;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--brand-700);
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--accent);display:inline-block;}
.pill{
  display:inline-block;
  font-size:12px;
  letter-spacing:.08em;
  padding:5px 12px;
  border-radius:var(--radius-btn);
  background:var(--accent);
  color:var(--accent-ink);
}
.pill--line{background:transparent;border:1px solid var(--line);color:var(--ink-500);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand-900);font-size:15px;font-weight:500;
  border-bottom:1px solid transparent;
  transition:border-color 220ms var(--ease);
}
.link-arrow svg{transition:transform 220ms var(--ease);}
.link-arrow:hover{border-bottom-color:var(--brand-900);}
.link-arrow:hover svg{transform:translateX(4px);}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-500);
}
.breadcrumb a{transition:color 200ms var(--ease);}
.breadcrumb a:hover{color:var(--brand-700);}
.breadcrumb .sep{color:var(--line);}

.reveal{opacity:0;transform:translateY(16px);transition:opacity 320ms var(--ease),transform 320ms var(--ease);}
.reveal.is-visible{opacity:1;transform:translateY(0);}

/* ============ HERO ============ */
.page-hero{
  padding:48px 0 80px;
  background:linear-gradient(180deg,var(--mist) 0%,rgba(220,230,225,0) 100%);
}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:56px;
  align-items:center;
  margin-top:24px;
}
.page-hero h1{
  font-family:var(--font-serif);
  font-size:clamp(30px,5vw,60px);
  line-height:1.12;
  font-weight:800;
  letter-spacing:-.02em;
  margin:20px 0 0;
}
.hero-lede{
  font-size:17px;
  line-height:1.85;
  color:var(--ink-500);
  max-width:640px;
  margin-top:22px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-facts{
  display:flex;flex-wrap:wrap;align-items:center;gap:20px;
  margin-top:36px;font-size:14px;color:var(--ink-500);
}
.hero-facts span{display:inline-flex;align-items:center;gap:10px;}
.hero-facts span + span{padding-left:20px;border-left:1px solid var(--line);}
.hero-facts b{font-family:var(--font-num);color:var(--brand-900);font-weight:600;}

.hero-figure{
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  background:var(--surface);
}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero-figure figcaption{
  font-size:13px;color:var(--ink-500);
  padding:14px 18px;border-top:1px solid var(--line);
}

/* ============ TIMELINE ============ */
.timeline{position:relative;margin-top:16px;}
.timeline::before{
  content:"";
  position:absolute;
  left:15px;top:10px;bottom:16px;
  width:2px;
  background:var(--line);
}
.timeline-item{
  position:relative;
  padding-left:64px;
  padding-bottom:56px;
}
.timeline-item:last-child{padding-bottom:0;}
.timeline-dot{
  position:absolute;
  left:0;top:2px;
  width:32px;height:32px;
  border-radius:50%;
  background:var(--brand-900);
  color:var(--accent);
  font-family:var(--font-num);
  font-size:12px;
  font-weight:600;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:.02em;
}
.step-title{
  font-family:var(--font-serif);
  font-size:22px;
  line-height:1.4;
  font-weight:700;
  margin-bottom:12px;
}
.step-text{
  font-size:16px;
  line-height:1.85;
  color:var(--ink-500);
  max-width:720px;
}
.step-note{
  margin-top:16px;
  max-width:720px;
  font-size:14px;
  line-height:1.8;
  color:var(--ink-500);
  border-left:3px solid var(--accent);
  padding-left:14px;
}
.step-media{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:32px;
  align-items:start;
}
.step-figure{
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--surface);
  box-shadow:var(--shadow-card);
}
.step-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.step-figure figcaption{font-size:13px;color:var(--ink-500);padding:12px 16px;border-top:1px solid var(--line);}

/* ============ CHECKLIST ============ */
.check-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
  margin-top:8px;
}
.check-item{
  display:flex;
  gap:14px;
  padding:24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.check-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--brand-900);}
.check-mark{
  flex:0 0 auto;
  width:26px;height:26px;
  border-radius:50%;
  background:var(--accent);
  display:flex;align-items:center;justify-content:center;
  margin-top:2px;
}
.check-item h3{font-size:17px;font-weight:500;line-height:1.5;margin-bottom:6px;}
.check-item p{font-size:14px;line-height:1.8;color:var(--ink-500);}

/* ============ COMPARE ============ */
.compare-list{margin-top:8px;border-top:1px solid var(--line);}
.compare-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:0;
  border-bottom:1px solid var(--line);
}
.compare-cell{padding:28px 32px 28px 0;}
.compare-cell + .compare-cell{
  padding-left:32px;
  border-left:1px solid var(--line);
}
.compare-label{
  font-size:14px;
  letter-spacing:.08em;
  margin-bottom:12px;
  display:inline-block;
}
.compare-label--risk{color:var(--warm);}
.compare-label--fix{color:var(--brand-700);}
.compare-cell h3{font-size:18px;font-weight:500;line-height:1.5;margin-bottom:8px;}
.compare-cell p{font-size:15px;line-height:1.8;color:var(--ink-500);}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);margin-top:8px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:24px;
  padding:24px 0;
  text-align:left;
  font-size:17px;
  font-weight:500;
  line-height:1.6;
  cursor:pointer;
  transition:color 200ms var(--ease);
}
.faq-q:hover{color:var(--brand-700);}
.faq-icon{
  position:relative;
  flex:0 0 auto;
  width:20px;height:20px;
  margin-top:4px;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:var(--brand-900);
  transition:transform 260ms var(--ease),opacity 260ms var(--ease);
}
.faq-icon::before{width:14px;height:2px;transform:translate(-50%,-50%);}
.faq-icon::after{width:2px;height:14px;transform:translate(-50%,-50%);}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 260ms var(--ease);
}
.faq-a-inner{
  padding:0 0 26px;
  font-size:15px;
  line-height:1.85;
  color:var(--ink-500);
  max-width:720px;
}

/* ============ CTA BAND ============ */
.cta-band{
  position:relative;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background:rgba(11,18,16,.82);
}
.cta-inner{
  position:relative;
  padding:96px 0;
  text-align:center;
  color:#fff;
}
.cta-inner h2{
  font-family:var(--font-serif);
  font-size:clamp(24px,3.2vw,40px);
  line-height:1.2;
  font-weight:700;
  letter-spacing:-.02em;
}
.cta-inner p{
  margin:18px auto 0;
  max-width:620px;
  font-size:16px;
  line-height:1.85;
  color:rgba(255,255,255,.74);
}
.cta-inner .btn{margin-top:32px;}

/* ============ FOOTER ============ */
.site-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.72);
  padding-top:72px;
  border-top:1px solid rgba(255,255,255,.10);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo-main{color:#fff;}
.footer-brand .logo-sub{color:rgba(255,255,255,.55);}
.footer-desc{
  margin-top:18px;
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.6);
  max-width:340px;
}
.footer-col h3{
  font-family:var(--font-serif);
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin-bottom:18px;
}
.footer-col ul{display:grid;gap:12px;font-size:14px;}
.footer-col a{color:rgba(255,255,255,.72);transition:color 200ms var(--ease);}
.footer-col a:hover{color:var(--accent);}
.footer-col span{color:rgba(255,255,255,.62);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:24px 0 32px;
  border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ============ RESPONSIVE ============ */
@media (max-width:1279px){
  .section{padding:96px 0;}
  .hero-grid{gap:40px;}
}
@media (max-width:1023px){
  .nav-side{display:none;}
  .nav-toggle{display:flex;}
  .header-inner{grid-template-columns:auto 1fr auto;height:70px;}
  .logo{justify-self:center;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-figure{order:2;}
  .step-media{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .section{padding:80px 0;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .section{padding:64px 0;}
  .section--tight{padding:56px 0;}
  .page-hero{padding:36px 0 64px;}
  .hero-lede{font-size:16px;}
  .hero-facts span + span{padding-left:0;border-left:0;}
  .hero-facts{gap:12px;flex-direction:column;align-items:flex-start;}
  .timeline::before{left:13px;}
  .timeline-item{padding-left:52px;padding-bottom:48px;}
  .timeline-dot{width:28px;height:28px;font-size:11px;}
  .check-grid{grid-template-columns:1fr;}
  .compare-row{grid-template-columns:1fr;}
  .compare-cell{padding:24px 0;}
  .compare-cell + .compare-cell{padding-left:0;border-left:0;border-top:1px dashed var(--line);padding-top:24px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;}
  .cta-inner{padding:72px 0;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:36px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:519px){
  h1,.page-hero h1{font-size:30px;}
  .h2,.cta-inner h2{font-size:24px;}
  .step-title{font-size:20px;}
  .faq-q{font-size:16px;}
  .btn{width:100%;}
  .hero-actions .btn{width:100%;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation:none !important;
    transition:none !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --ink-900:#0B1210;
  --brand-900:#10352D;
  --brand-700:#1F6B57;
  --accent:#C8F751;
  --accent-ink:#12210C;
  --warm:#E5623C;
  --paper:#FBF9F4;
  --surface:#FFFFFF;
  --line:#E3E0D6;
  --ink-500:#5A6663;
  --mist:#DCE6E1;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",SimSun,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:Inter,"Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-1:0 1px 2px rgba(11,18,16,.04);
  --shadow-2:0 10px 24px rgba(16,53,45,.10);
  --shadow-3:0 16px 40px rgba(11,18,16,.16);
  --radius-card:14px;
  --radius-input:10px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-900);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:700;letter-spacing:-.02em;line-height:1.2}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
svg{display:block}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:var(--accent);color:var(--accent-ink)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:500;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(16,53,45,.18)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-1)}
.btn-ghost{background:transparent;border-color:var(--brand-900);color:var(--brand-900)}
.btn-ghost:hover{background:var(--brand-900);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-arrow::after{content:"→";font-family:var(--font-num);transition:transform .2s var(--ease);display:inline-block}
.btn-arrow:hover::after{transform:translateX(4px)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;
  padding:6px 12px;border-radius:999px;
  font-size:12px;letter-spacing:.08em;
  background:var(--accent);color:var(--accent-ink);
}
.tag-outline{background:transparent;border:1px solid var(--line);color:var(--ink-500);letter-spacing:.04em}
.tag-warm{background:rgba(229,98,60,.12);color:var(--warm);letter-spacing:.04em}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,249,244,.95);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 20px rgba(11,18,16,.04)}
.header-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:76px;transition:height .24s var(--ease);
}
.site-header.is-scrolled .header-inner{height:64px}
.nav-side{display:flex;align-items:center;gap:28px}
.nav-side--left{justify-self:start}
.nav-side--right{justify-self:end}
.nav-link{
  position:relative;padding:6px 1px;font-size:15px;color:var(--ink-900);
  transition:color .18s var(--ease);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--brand-900);transition:width .22s var(--ease);
}
.nav-link:hover{color:var(--brand-700)}
.nav-link:hover::after{width:18px}
.nav-link.active{color:var(--brand-900);font-weight:500}
.nav-link.active::after{width:18px}
.logo{display:inline-flex;align-items:center;gap:10px;justify-self:center}
.logo-mark{
  width:36px;height:36px;padding:5px;flex:none;
  background:var(--brand-900);border-radius:50%;
  transition:transform .28s var(--ease);
}
.logo:hover .logo-mark{transform:rotate(-8deg)}
.logo-text{display:flex;flex-direction:column;line-height:1.12}
.logo-main{font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:.02em;color:inherit}
.logo-sub{font-size:11px;letter-spacing:.02em;color:var(--ink-500)}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;padding:9px;justify-self:end;border-radius:8px;
}
.nav-toggle span{display:block;height:2px;width:100%;background:var(--brand-900);border-radius:2px;transition:transform .24s var(--ease),opacity .24s var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{
  position:fixed;left:0;right:0;top:64px;bottom:0;z-index:55;
  background:var(--paper);padding:8px 24px 40px;overflow-y:auto;
  display:none;flex-direction:column;
  border-top:1px solid var(--line);
}
.mobile-panel.is-open{display:flex}
.mobile-panel a.m-panel-link{
  display:block;font-size:18px;line-height:56px;
  border-bottom:1px solid var(--line);color:var(--ink-900);
}
.mobile-panel a.m-panel-link.active{color:var(--brand-900);font-weight:500}
.mobile-panel .m-cta{margin-top:28px;width:100%}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:22px 0 0;font-size:13px;color:var(--ink-500);
}
.breadcrumb a:hover{color:var(--brand-700)}
.breadcrumb .sep{color:#C7C3B8}

/* ---------- Hero ---------- */
.page-hero{padding:32px 0 44px}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero-copy h1{font-size:clamp(30px,5vw,52px);line-height:1.14;font-weight:800;max-width:13em}
.hero-lead{margin-top:22px;max-width:640px;font-size:17px;line-height:1.85;color:var(--ink-500)}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-figure{
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  background:var(--surface);box-shadow:var(--shadow-1);
  aspect-ratio:16/10;
}
.hero-figure img{width:100%;height:100%;object-fit:cover}

/* ---------- 检索工具条 ---------- */
.qa-toolbar{padding:8px 0 0}
.search-field{
  display:flex;align-items:center;gap:12px;
  max-width:600px;height:56px;padding:0 20px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-input);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-field:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(200,247,81,.4)}
.search-field svg{flex:none;color:var(--ink-500)}
.search-field input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:15px}
.search-field input::placeholder{color:#9AA5A1}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.chip{
  padding:8px 18px;border-radius:999px;border:1px solid var(--line);
  background:var(--surface);font-size:14px;color:var(--ink-500);
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease),transform .2s var(--ease);
}
.chip:hover{border-color:var(--brand-900);color:var(--brand-900);transform:translateY(-1px)}
.chip.is-active{background:var(--brand-900);border-color:var(--brand-900);color:#fff}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,3.2vw,38px);line-height:1.2}
.section-head p{margin-top:16px;font-size:16px;line-height:1.85;color:var(--ink-500)}

/* ---------- FAQ ---------- */
.faq-columns{display:grid;grid-template-columns:1fr 1fr;gap:0 48px;margin-top:8px}
.faq-col{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;align-items:flex-start;gap:16px;width:100%;
  padding:22px 0;text-align:left;background:none;border:0;
}
.faq-num{
  flex:none;padding-top:5px;
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:13px;font-weight:500;letter-spacing:.04em;color:var(--brand-700);
}
.faq-title{
  flex:1;font-family:var(--font-serif);font-size:18px;font-weight:700;line-height:1.5;
  transition:color .18s var(--ease);
}
.faq-q:hover .faq-title{color:var(--brand-700)}
.faq-icon{position:relative;flex:none;width:22px;height:22px;margin-top:3px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand-900);
  transition:transform .26s var(--ease),opacity .26s var(--ease);
}
.faq-icon::before{left:0;top:10px;width:22px;height:2px}
.faq-icon::after{left:10px;top:0;width:2px;height:22px}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-item.is-open .faq-icon::before{transform:rotate(180deg);background:var(--brand-700)}
.faq-a{overflow:hidden;max-height:0;transition:max-height .26s var(--ease)}
.faq-a-inner{padding:0 0 24px 42px;font-size:15px;line-height:1.85;color:var(--ink-500);max-width:640px}
.faq-empty{
  display:none;margin-top:32px;padding:40px 24px;text-align:center;
  border:1px dashed var(--line);border-radius:var(--radius-card);background:var(--surface);
}
.faq-empty.is-visible{display:block}
.faq-empty svg{margin:0 auto 16px;color:var(--brand-900)}
.faq-empty p{font-size:15px;color:var(--ink-500)}

/* ---------- 快速核对清单 ---------- */
.check-list{border-top:1px solid var(--line);margin-top:4px}
.check-item{
  display:grid;grid-template-columns:72px 1fr;gap:24px;align-items:start;
  padding:28px 0;border-bottom:1px solid var(--line);
}
.check-item .idx{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:15px;font-weight:500;letter-spacing:.06em;color:var(--brand-700);
  padding-top:3px;
}
.check-item h3{font-size:20px;line-height:1.4}
.check-item p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--ink-500);max-width:760px}

/* ---------- 未解决 CTA 条 ---------- */
.unresolved{background:var(--ink-900);color:#fff;padding:56px 0}
.unresolved-inner{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
.unresolved h2{font-size:clamp(22px,2.6vw,30px);color:#fff}
.unresolved p{margin-top:12px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.66);max-width:680px}
.unresolved .btn{flex:none}

/* ---------- 相关分类 ---------- */
.related-list{border-top:1px solid var(--line);margin-top:8px}
.related-item{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 0;border-bottom:1px solid var(--line);
  transition:padding-left .22s var(--ease);
}
.related-item:hover{padding-left:8px}
.related-item .r-title{font-family:var(--font-serif);font-size:20px;font-weight:700}
.related-item .r-desc{margin-top:8px;font-size:14px;color:var(--ink-500);max-width:640px}
.related-item .r-arrow{font-family:var(--font-num);color:var(--brand-700);font-size:18px;transition:transform .22s var(--ease)}
.related-item:hover .r-arrow{transform:translateX(4px)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;padding:72px 0 0;
  background:var(--ink-900);color:rgba(255,255,255,.72);
  border-top:1px solid rgba(255,255,255,.10);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px}
.footer-brand .logo-mark{background:rgba(200,247,81,.12)}
.footer-brand .logo-main{color:#fff}
.footer-brand .logo-sub{color:rgba(255,255,255,.55)}
.footer-desc{margin-top:18px;max-width:320px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.6)}
.footer-col h3{
  margin-bottom:18px;font-family:var(--font-sans);
  font-size:13px;font-weight:500;letter-spacing:.08em;color:#fff;
}
.footer-col li{margin-bottom:12px;font-size:14px;line-height:1.7}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;
  margin-top:56px;padding:22px 0 28px;
  border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:rgba(255,255,255,.45);
}

/* ---------- 移动端 ---------- */
@media (max-width:1279px){
  .section{padding:74px 0}
  .hero-grid{gap:40px}
}
@media (max-width:1023px){
  .header-inner{grid-template-columns:1fr auto;height:64px}
  .site-header.is-scrolled .header-inner{height:64px}
  .nav-side{display:none}
  .nav-toggle{display:flex}
  .logo{justify-self:start}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-figure{order:-1;aspect-ratio:16/9}
  .faq-columns{grid-template-columns:1fr;gap:0}
  .faq-col:last-child{border-top:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .unresolved{padding:48px 0}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:60px 0}
  .page-hero{padding:22px 0 32px}
  .hero-lead{font-size:16px}
  .faq-title{font-size:17px}
  .check-item{grid-template-columns:48px 1fr;gap:16px;padding:22px 0}
  .check-item h3{font-size:18px}
  .related-item .r-title{font-size:18px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .site-footer{padding:56px 0 0;margin-top:64px}
  .unresolved .btn{width:100%}
  .search-field{height:52px}
}
@media (max-width:519px){
  .hero-copy h1{font-size:clamp(26px,8vw,32px)}
  .btn{padding:12px 20px;font-size:14px}
  .faq-a-inner{padding-left:0}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn:hover,.chip:hover,.logo:hover .logo-mark,.related-item:hover{padding-left:0}
  .btn:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --ink-900:#0B1210;
  --brand-900:#10352D;
  --brand-700:#1F6B57;
  --accent:#C8F751;
  --accent-ink:#12210C;
  --warm:#E5623C;
  --paper:#FBF9F4;
  --surface:#FFFFFF;
  --line:#E3E0D6;
  --ink-500:#5A6663;
  --mist:#DCE6E1;
  --radius-card:14px;
  --radius-pill:999px;
  --radius-sm:10px;
  --shadow-card:0 1px 2px rgba(11,18,16,.04);
  --shadow-hover:0 10px 24px rgba(16,53,45,.10);
  --shadow-pop:0 16px 40px rgba(11,18,16,.16);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
  --header-h:76px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:700;letter-spacing:-.02em}
p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,249,244,.95);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 1px 2px rgba(11,18,16,.04)}
.header-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;
  height:var(--header-h);transition:height .22s var(--ease);
}
.site-header.is-scrolled .header-inner{height:64px}
.nav-side{display:flex;align-items:center;gap:28px}
.nav-side--left{justify-content:flex-start}
.nav-side--right{justify-content:flex-end;gap:22px}
.nav-link{
  position:relative;font-size:15px;color:var(--ink-900);padding:6px 0;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--brand-900);transition:width .22s var(--ease);
}
.nav-link:hover{color:var(--brand-700)}
.nav-link:hover::after{width:18px}
.nav-link.active{color:var(--brand-900);font-weight:500}
.nav-link.active::after{width:18px}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:var(--radius-pill);
  background:var(--accent);color:var(--accent-ink);
  font-size:14px;font-weight:600;letter-spacing:.02em;
  box-shadow:var(--shadow-card);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.nav-cta svg{width:15px;height:15px}
.logo{display:flex;align-items:center;gap:10px;justify-self:center}
.logo-mark{width:32px;height:32px;flex:none}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-main{font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:.02em;color:var(--brand-900)}
.logo-sub{font-size:11px;letter-spacing:.14em;color:var(--ink-500)}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-sm);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  background:var(--surface);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand-900);transition:transform .22s var(--ease),opacity .18s var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{
  display:none;border-top:1px solid var(--line);background:var(--paper);
  padding:8px 24px 24px;
}
.mobile-panel.is-open{display:block}
.mobile-panel a{
  display:block;font-size:18px;line-height:56px;border-bottom:1px solid var(--line);
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.mobile-panel a:hover{color:var(--brand-700);padding-left:6px}
.mobile-panel a.active{color:var(--brand-900);font-weight:600}
.mobile-panel .mobile-cta{
  margin-top:20px;text-align:center;border-bottom:0;background:var(--accent);color:var(--accent-ink);
  border-radius:var(--radius-pill);font-weight:600;font-size:16px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);margin-bottom:22px}
.breadcrumb a{transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--brand-700)}
.breadcrumb .sep{opacity:.6}
.breadcrumb .current{color:rgba(255,255,255,.78)}

/* ---------- 页面首屏 ---------- */
.page-hero{
  position:relative;color:#fff;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(11,18,16,.82),rgba(16,53,45,.86)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:rgba(255,255,255,.12);
}
.page-hero .container{position:relative;z-index:2;padding-top:64px;padding-bottom:72px}
.page-hero h1{
  font-size:clamp(30px,5vw,54px);line-height:1.14;font-weight:800;max-width:860px;
  color:#fff;
}
.page-hero .lead{
  margin-top:22px;max-width:720px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.82);
}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:0;margin-top:34px;
  border-top:1px solid rgba(255,255,255,.16);padding-top:22px;max-width:820px;
}
.hero-facts li{
  flex:1 1 180px;padding-right:24px;position:relative;
}
.hero-facts li + li{padding-left:24px;border-left:1px solid rgba(255,255,255,.16)}
.hero-facts strong{display:block;font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--accent);letter-spacing:-.02em}
.hero-facts span{display:block;margin-top:4px;font-size:13px;color:rgba(255,255,255,.68)}

/* ---------- 章节通用 ---------- */
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,3.2vw,38px);line-height:1.22}
.section-head p{margin-top:16px;color:var(--ink-500);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-num);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--brand-700);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent)}

/* ---------- 双栏文档布局 ---------- */
.doc-section{padding:72px 0 96px}
.doc-layout{
  display:grid;grid-template-columns:240px minmax(0,1fr);gap:64px;align-items:start;
}
.doc-toc{
  position:sticky;top:104px;
  border-left:2px solid var(--line);padding-left:18px;
}
.doc-toc h3{
  font-family:var(--font-sans);font-size:13px;letter-spacing:.12em;color:var(--ink-500);
  font-weight:500;margin-bottom:16px;
}
.doc-toc ul{display:flex;flex-direction:column;gap:2px}
.doc-toc a{
  display:block;font-size:13.5px;line-height:1.6;padding:7px 0;color:var(--ink-500);
  border-left:2px solid transparent;margin-left:-20px;padding-left:18px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.doc-toc a:hover{color:var(--brand-700)}
.doc-toc a.active{color:var(--brand-900);border-left-color:var(--brand-900);font-weight:500}
.doc-body{max-width:760px}
.doc-body h2{
  font-size:clamp(22px,2.4vw,30px);line-height:1.3;margin-top:56px;padding-left:16px;position:relative;
  scroll-margin-top:110px;
}
.doc-body h2:first-of-type{margin-top:0}
.doc-body h2::before{
  content:"";position:absolute;left:0;top:8px;width:3px;height:22px;background:var(--accent);border-radius:2px;
}
.doc-body h3{font-size:20px;line-height:1.4;margin-top:32px}
.doc-body p{margin-top:18px;font-size:17px;line-height:1.9;color:#22302C}
.doc-body .muted{color:var(--ink-500);font-size:15px}
.doc-body ul.bullets{margin-top:18px;display:flex;flex-direction:column;gap:12px}
.doc-body ul.bullets li{
  position:relative;padding-left:24px;font-size:16.5px;line-height:1.85;color:#22302C;
}
.doc-body ul.bullets li::before{
  content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:2px;
  background:var(--accent);box-shadow:inset 0 0 0 1px rgba(16,53,45,.25);
}
.doc-figure{margin:34px 0 0}
.doc-figure img{
  width:100%;border-radius:var(--radius-card);border:1px solid var(--line);
  aspect-ratio:16/9;object-fit:cover;
}
.doc-figure figcaption{margin-top:12px;font-size:13px;color:var(--ink-500);text-align:center}
.callout{
  margin-top:28px;padding:22px 24px;border-radius:var(--radius-card);
  background:var(--mist);border-left:3px solid var(--brand-900);
}
.callout strong{font-family:var(--font-serif);font-size:17px;color:var(--brand-900);display:block}
.callout p{margin-top:8px;font-size:15.5px;line-height:1.85;color:#28403A}

/* ---------- 风险/建议对照块 ---------- */
.compare{
  margin-top:30px;display:grid;grid-template-columns:1fr 1fr;
  border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);
  overflow:hidden;
}
.compare-col{padding:26px 26px 30px}
.compare-col + .compare-col{border-left:1px solid var(--line)}
.compare-label{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.1em;
  padding:4px 12px;border-radius:var(--radius-pill);font-weight:600;
}
.compare-label--risk{background:rgba(229,98,60,.12);color:#A63C1D}
.compare-label--safe{background:var(--accent);color:var(--accent-ink)}
.compare-col h4{font-family:var(--font-serif);font-size:18px;line-height:1.4;margin-top:16px}
.compare-col p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--ink-500)}
.compare-col ul{margin-top:14px;display:flex;flex-direction:column;gap:9px}
.compare-col ul li{position:relative;padding-left:16px;font-size:14.5px;line-height:1.7;color:#2C3A36}
.compare-col ul li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--brand-700)}
.compare-col--risk ul li::before{background:var(--warm)}

/* ---------- 编号步骤 ---------- */
.steps{margin-top:26px;position:relative;padding-left:34px}
.steps::before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:var(--line)}
.step{position:relative;padding-bottom:28px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:-34px;top:6px;width:20px;height:20px;border-radius:50%;
  background:var(--surface);border:2px solid var(--brand-900);
}
.step h4{font-family:var(--font-serif);font-size:18px;line-height:1.45}
.step p{margin-top:8px;font-size:15.5px;line-height:1.85;color:#33413D}
.step .tag{
  display:inline-block;margin-top:10px;font-size:12px;letter-spacing:.06em;
  padding:3px 10px;border:1px solid var(--line);border-radius:var(--radius-pill);color:var(--ink-500);
}

/* ---------- 核对清单 ---------- */
.checklist{
  margin-top:26px;border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--surface);overflow:hidden;box-shadow:var(--shadow-card);
}
.checklist li{
  display:flex;gap:14px;align-items:flex-start;padding:18px 24px;
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.checklist li:last-child{border-bottom:0}
.checklist li:hover{background:#FAFAF7}
.checklist .idx{
  font-family:var(--font-num);font-size:13px;color:var(--brand-700);font-weight:600;
  min-width:26px;padding-top:3px;
}
.checklist strong{display:block;font-family:var(--font-serif);font-size:16.5px;line-height:1.5}
.checklist span{display:block;margin-top:4px;font-size:14.5px;color:var(--ink-500);line-height:1.75}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:24px 4px;text-align:left;font-family:var(--font-serif);
  font-size:17.5px;line-height:1.55;color:var(--ink-900);font-weight:700;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand-700)}
.faq-icon{
  flex:none;width:26px;height:26px;margin-top:2px;border-radius:50%;
  border:1px solid var(--line);display:grid;place-items:center;
  transition:transform .26s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand-900);border-radius:1px}
.faq-icon{position:relative}
.faq-icon::before{width:11px;height:2px}
.faq-icon::after{width:2px;height:11px;transition:transform .26s var(--ease),opacity .22s var(--ease)}
.faq-item.is-open .faq-icon{background:var(--accent);border-color:var(--accent)}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .26s var(--ease);
}
.faq-a p{padding:0 60px 26px 4px;font-size:15.5px;line-height:1.85;color:var(--ink-500)}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;color:#fff;text-align:center;
  background-image:linear-gradient(180deg,rgba(11,18,16,.86),rgba(11,18,16,.88)),url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;
  padding:96px 0;
}
.cta-band h2{font-size:clamp(24px,3vw,36px);line-height:1.24;color:#fff;max-width:720px;margin:0 auto}
.cta-band p{margin:18px auto 0;max-width:600px;color:rgba(255,255,255,.78);font-size:16px}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:34px}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 30px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn svg{width:16px;height:16px;transition:transform .2s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn:hover svg{transform:translateX(4px)}
.btn--primary{background:var(--accent);color:var(--accent-ink);box-shadow:var(--shadow-card)}
.btn--primary:hover{box-shadow:var(--shadow-hover)}
.btn--ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.32)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn--outline{background:transparent;color:var(--brand-900);border:1px solid var(--brand-900)}
.btn--outline:hover{background:var(--brand-900);color:#fff}

/* ---------- 相关链接行式列表 ---------- */
.related{padding:72px 0 88px}
.related h2{font-size:clamp(22px,2.6vw,30px)}
.link-list{margin-top:28px;border-top:1px solid var(--line)}
.link-list a{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:20px 6px;border-bottom:1px solid var(--line);
  transition:padding-left .22s var(--ease),color .2s var(--ease);
}
.link-list a:hover{padding-left:14px;color:var(--brand-700)}
.link-list .lk-title{font-family:var(--font-serif);font-size:17px;font-weight:700}
.link-list .lk-desc{display:block;margin-top:5px;font-size:14px;color:var(--ink-500);font-weight:400;font-family:var(--font-sans)}
.link-list .lk-arrow{flex:none;color:var(--ink-500);transition:transform .22s var(--ease),color .2s var(--ease)}
.link-list a:hover .lk-arrow{transform:translateX(4px);color:var(--brand-700)}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);color:rgba(255,255,255,.72);
  border-top:1px solid rgba(255,255,255,.10);
  padding:72px 0 26px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;
  padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.10);
}
.footer-brand .logo{margin-bottom:18px}
.footer-brand .logo-main{color:#fff}
.footer-brand .logo-sub{color:rgba(255,255,255,.55)}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:300px}
.footer-col h3{
  font-family:var(--font-sans);font-size:13px;font-weight:600;letter-spacing:.1em;
  color:rgba(255,255,255,.95);margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a,.footer-col span{font-size:14px;line-height:1.7;color:rgba(255,255,255,.72);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  padding-top:24px;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .section{padding:96px 0}
  .doc-layout{gap:48px}
}
@media (max-width:1023px){
  .header-inner{display:flex;justify-content:space-between;height:64px}
  .nav-side{display:none}
  .nav-toggle{display:inline-flex}
  .logo{justify-self:flex-start}
  .section{padding:80px 0}
  .doc-layout{display:block}
  .doc-toc{
    position:static;border-left:0;padding-left:0;margin-bottom:36px;
    border-bottom:1px solid var(--line);padding-bottom:16px;
  }
  .doc-toc ul{
    flex-direction:row;gap:10px;overflow-x:auto;padding-bottom:6px;
    scrollbar-width:thin;-webkit-overflow-scrolling:touch;
  }
  .doc-toc a{
    white-space:nowrap;margin-left:0;padding:8px 16px;border:1px solid var(--line);
    border-radius:var(--radius-pill);font-size:13px;
  }
  .doc-toc a.active{border-color:var(--brand-900)}
  .doc-body{max-width:none}
  .page-hero .container{padding-top:48px;padding-bottom:56px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:64px 0}
  .doc-section{padding:48px 0 72px}
  .compare{grid-template-columns:1fr}
  .compare-col + .compare-col{border-left:0;border-top:1px solid var(--line)}
  .hero-facts li{flex:1 1 100%;padding:14px 0;border-left:0!important;padding-left:0!important}
  .hero-facts li + li{border-top:1px solid rgba(255,255,255,.16)}
  .cta-band{padding:72px 0}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:34px}
  .faq-a p{padding-right:8px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:479px){
  body{font-size:15.5px}
  .page-hero h1{font-size:clamp(26px,8vw,32px)}
  .btn{padding:13px 22px;font-size:14.5px}
  .doc-body p{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important;
  }
  .btn:hover,.nav-cta:hover{transform:none}
}