/* roulang page: index */
:root{
  --ink:#10201D; --ink-2:#16332E; --ink-3:#2E3B37;
  --body-c:#4A4642; --muted:#7A756E;
  --accent:#C9552E; --accent-soft:#F3E4DC;
  --jade:#7D9A93; --jade-soft:#E8EFEC;
  --paper:#F8F5F0; --card:#FFFFFF; --line:#E6E2DA;
  --shadow-flat:0 1px 2px rgba(16,32,29,.05);
  --shadow-lift:0 12px 28px -18px rgba(16,32,29,.28);
  --r-card:14px; --r-btn:10px; --r-img:18px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--body-c);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:17px;line-height:1.9;-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:'Songti SC','Source Han Serif SC','Noto Serif SC',serif;
  color:var(--ink);margin:0;line-height:1.25;font-weight:600;
}
p{margin:0}
img{max-width:100%;display:block;border-style:none}
a{color:var(--ink-2);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--jade);outline-offset:2px;border-radius:4px}
::selection{background:var(--accent-soft);color:var(--ink)}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
@media(min-width:1024px){.container{padding:0 40px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);box-shadow:var(--shadow-flat);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 10px 26px -20px rgba(16,32,29,.55)}
.nav-wrap{display:flex;align-items:center;height:72px;gap:20px}
@media(max-width:767px){.nav-wrap{height:60px;gap:10px}}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-text{font-size:18px;font-weight:600;color:var(--ink);line-height:1.2}
@media(max-width:767px){.brand-text{font-size:15px;max-width:118px}}
.nav-links{display:none;align-items:center;gap:32px;margin-left:auto;margin-right:auto}
@media(min-width:900px){.nav-links{display:flex}}
.nav-link{position:relative;font-size:15px;color:#3A3F3C;padding:6px 0;white-space:nowrap}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease;
}
.nav-link:hover{color:var(--ink-2)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink-2);font-weight:500}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.nav-search{
  display:none;align-items:center;gap:8px;height:40px;width:228px;
  padding:0 16px;border:1px solid var(--line);background:var(--paper);border-radius:999px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
@media(min-width:1024px){.nav-search{display:flex}}
.nav-search:focus-within{border-color:var(--ink-2);box-shadow:0 0 0 2px var(--jade-soft)}
.nav-search input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14px;color:var(--ink-3);font-family:inherit;
}
.nav-search input::placeholder{color:var(--muted)}
.nav-cta{white-space:nowrap}
.menu-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--line);background:#fff;
  border-radius:10px;cursor:pointer;color:var(--ink-2);
}
@media(min-width:900px){.menu-toggle{display:none}}
.menu-toggle:hover{border-color:var(--accent);color:var(--accent)}

.drawer{
  position:fixed;inset:60px 0 0 0;background:#fff;z-index:55;
  padding:24px 20px 32px;display:flex;flex-direction:column;gap:28px;
  transform:translateY(-8px);opacity:0;visibility:hidden;
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
  overflow-y:auto;
}
.drawer.open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-nav{display:flex;flex-direction:column;gap:6px}
.drawer-nav a{
  font-size:16px;padding:14px 4px;border-bottom:1px solid var(--line);color:var(--ink-3);
}
.drawer-nav a.active{color:var(--accent);font-weight:600}
.drawer-actions{display:flex;gap:12px;margin-top:auto}
.drawer-actions .btn{flex:1}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 16px;
  border:1px solid var(--line);border-radius:999px;background:var(--paper);
}
.drawer-search input{border:0;background:transparent;outline:none;width:100%;font-size:15px;font-family:inherit;color:var(--ink-3)}
body.lock{overflow:hidden}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .15s ease;
}
.btn .arw{display:inline-block;transition:transform .2s ease}
.btn:hover .arw{transform:translateX(4px)}
.btn:active{transform:scale(.98)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn-lg{height:52px;padding:0 32px;font-size:16px}
.btn-primary{background:var(--ink-2);color:#fff}
.btn-primary:hover{background:var(--accent);color:#fff}
.btn-ghost{background:transparent;color:var(--ink-2);border-color:var(--ink-2)}
.btn-ghost:hover{background:rgba(22,51,46,.08);border-color:var(--accent);color:var(--accent)}
.btn-paper{background:var(--paper);color:var(--ink)}
.btn-paper:hover{background:var(--accent);color:#fff}
.btn-outline-light{background:transparent;color:#F8F5F0;border-color:rgba(255,255,255,.35)}
.btn-outline-light:hover{background:rgba(255,255,255,.1);color:#fff}
.link-arrow{color:var(--ink-2);font-size:15px;font-weight:500;display:inline-flex;align-items:center;gap:6px}
.link-arrow .arw{transition:transform .2s ease}
.link-arrow:hover{color:var(--accent)}
.link-arrow:hover .arw{transform:translateX(4px)}

/* ---------- shared bits ---------- */
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:104px 0}}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:48px}
.sec-title{font-size:28px;font-weight:600}
@media(min-width:1024px){.sec-title{font-size:40px}}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.12em;color:var(--jade);
  font-weight:600;margin-bottom:14px;
}
.rule{width:120px;height:1px;background:var(--line);margin:28px 0}
.tag-jade{
  display:inline-block;font-size:13px;color:var(--ink-2);background:var(--jade-soft);
  padding:6px 14px;border-radius:999px;line-height:1.4;
}
.badge{
  display:inline-block;font-size:12px;letter-spacing:.12em;line-height:1.6;
  color:var(--accent);border:1px solid var(--accent);border-radius:4px;
  padding:2px 8px;background:transparent;
}
.badge-jade{color:var(--ink-2);border-color:var(--jade);background:var(--jade-soft)}

/* ---------- hero ---------- */
.hero{
  position:relative;background:var(--paper);overflow:hidden;
  padding:56px 0 72px;
}
@media(min-width:1024px){.hero{padding:72px 0 104px;min-height:560px}}
.hero::before{
  content:"";position:absolute;top:44px;right:6%;width:180px;height:180px;
  border-top:1px solid #EDE7DC;border-right:1px solid #EDE7DC;pointer-events:none;
}
.hero::after{
  content:"";position:absolute;bottom:44px;left:4%;width:140px;height:140px;
  border-bottom:1px solid #EDE7DC;border-left:1px solid #EDE7DC;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr;gap:56px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:6fr 6fr;gap:64px}}
.hero .vlabel{
  display:inline-block;font-size:13px;letter-spacing:.3em;color:var(--jade);
  font-weight:600;margin-bottom:18px;
}
.hero h1{
  font-size:clamp(2.1rem,5.2vw,3.75rem);line-height:1.15;color:var(--ink);
  letter-spacing:-.01em;
}
.hero-sub{margin-top:20px;font-size:17px;color:#4A4642;line-height:1.8;max-width:34em}
@media(min-width:1024px){.hero-sub{font-size:18px}}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.hero-media{position:relative}
.hero-media-frame{
  overflow:hidden;border-radius:var(--r-img);border:1px solid var(--line);
  box-shadow:var(--shadow-flat);background:#fff;
}
.hero-media-frame img{width:100%;height:340px;object-fit:cover;transition:transform .6s ease}
@media(min-width:1024px){.hero-media-frame img{height:440px}}
.hero-media:hover .hero-media-frame img{transform:scale(1.03)}
.hero-float{
  position:absolute;right:14px;bottom:-30px;width:158px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-card);padding:8px;
  box-shadow:var(--shadow-lift);
}
.hero-float img{width:100%;height:104px;object-fit:cover;border-radius:8px}
@media(max-width:639px){.hero-float{display:none}}

/* ---------- prep band ---------- */
.prep-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.prep-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:640px){.prep-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.prep-grid{grid-template-columns:repeat(4,1fr)}}
.prep-item{border-left:2px solid var(--jade-soft);padding:6px 0 6px 18px}
.prep-item h3{font-size:17px;margin-bottom:8px;font-weight:600}
.prep-item p{font-size:15px;color:var(--muted);line-height:1.8}

/* ---------- steps ---------- */
.steps-band{background:#fff}
.steps-grid{display:grid;grid-template-columns:1fr;gap:44px}
@media(min-width:1024px){
  .steps-grid{grid-template-columns:repeat(3,1fr);gap:0}
}
.step{padding:0 0 0 24px;border-left:1px solid var(--line);transition:transform .3s ease}
.steps-grid .step:first-child{border-left:0;padding-left:0}
@media(min-width:1024px){
  .steps-grid .step{padding:0 32px}
  .steps-grid .step:nth-child(1){transform:translateY(0)}
  .steps-grid .step:nth-child(2){transform:translateY(32px)}
  .steps-grid .step:nth-child(3){transform:translateY(64px)}
}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:64px;height:64px;border-radius:50%;border:1px solid var(--ink-2);
  color:var(--ink-2);font-family:'Songti SC',serif;font-size:24px;font-weight:600;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.step:hover .step-num{background:var(--accent);border-color:var(--accent);color:#fff}
.step h3{font-size:20px;margin:22px 0 12px;font-weight:600}
.step p{font-size:16px;color:var(--body-c);line-height:1.9}
.step .step-note{font-size:14px;color:var(--muted);margin-top:12px}

/* ---------- cases ---------- */
.case-row{display:grid;grid-template-columns:1fr;gap:28px;align-items:center}
@media(min-width:1024px){
  .case-row{grid-template-columns:1fr 1fr;gap:56px}
  .case-row.reverse .case-media{order:2}
  .case-row.reverse .case-text{order:1}
}
.case-media{overflow:hidden;border-radius:var(--r-card);border:1px solid var(--line);background:#fff}
.case-media img{width:100%;height:240px;object-fit:cover;transition:transform .6s ease}
@media(min-width:1024px){.case-media img{height:290px}}
.case-media:hover img{transform:scale(1.03)}
.case-text h3{font-size:20px;margin:14px 0 12px}
.case-text p{font-size:16px;color:var(--body-c);line-height:1.9}
.case-result{
  margin-top:18px;padding-left:12px;border-left:2px solid var(--ink-2);
  font-size:15px;color:var(--ink-2);font-weight:500;
}
.case-list{display:flex;flex-direction:column;gap:56px}
@media(min-width:1024px){.case-list{gap:80px}}

/* ---------- cms posts ---------- */
.cms-band{background:#fff}
.post-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:640px){.post-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.post-grid{grid-template-columns:repeat(3,1fr);gap:28px}}
.post-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;box-shadow:var(--shadow-flat);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.post-card:hover{
  transform:translateY(-2px);border-color:rgba(201,85,46,.35);box-shadow:var(--shadow-lift);
}
.post-card .badge{align-self:flex-start}
.post-title{font-size:18px;font-weight:600;margin:14px 0 10px;line-height:1.5}
.post-title a{color:var(--ink)}
.post-title a:hover{color:var(--accent)}
.post-summary{font-size:14px;color:#6B6660;line-height:1.85;flex:1}
.post-meta{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
}
.post-meta a{color:var(--ink-2);font-weight:500}
.post-meta a:hover{color:var(--accent)}
.empty-state{
  padding:64px 24px;text-align:center;border:1px dashed var(--line);
  border-radius:var(--r-card);background:var(--paper);
}
.empty-state p{font-size:14px;color:var(--muted);margin-top:14px}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:1fr;gap:44px}
@media(min-width:1024px){.faq-layout{grid-template-columns:4fr 8fr;gap:64px}}
.faq-aside h2{font-size:28px;margin-bottom:16px}
@media(min-width:1024px){
  .faq-aside{position:sticky;top:96px;align-self:start}
  .faq-aside h2{font-size:36px}
}
.faq-aside p{font-size:16px;color:var(--muted);line-height:1.9}
.faq-aside .btn{margin-top:26px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  border-left:3px solid transparent;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-left-color:var(--accent);box-shadow:var(--shadow-flat)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 22px;font-size:17px;font-weight:500;
  color:var(--ink-3);display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open] summary{color:var(--ink-2)}
.faq-icon{position:relative;flex:0 0 auto;width:16px;height:16px;transition:transform .2s ease}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--accent);border-radius:1px;
}
.faq-icon::before{left:0;top:7px;width:16px;height:1.5px}
.faq-icon::after{left:7px;top:0;width:1.5px;height:16px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-item .faq-a{
  padding:0 22px 22px;font-size:15px;line-height:1.9;color:var(--body-c);
}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;background:var(--ink);color:#F3EFE8;
  padding:64px 0;overflow:hidden;
}
@media(min-width:1024px){.cta-band{padding:96px 0}}
.cta-band::before{
  content:"";position:absolute;top:32px;right:8%;width:160px;height:160px;
  border-top:1px solid rgba(255,255,255,.06);border-right:1px solid rgba(255,255,255,.06);
}
.cta-band h2{color:#F8F5F0;font-size:26px}
@media(min-width:1024px){.cta-band h2{font-size:34px}}
.cta-band p{color:rgba(255,255,255,.72);font-size:16px;margin-top:16px;max-width:34em}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.cta-note{font-size:13px;color:rgba(255,255,255,.6);margin-top:22px}
@media(max-width:767px){
  .cta-band .cta-inner{text-align:center}
  .cta-band p{margin-left:auto;margin-right:auto}
  .cta-actions{justify-content:center}
}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#F3EFE8;padding:64px 0 0}
@media(max-width:767px){.site-footer{padding:48px 0 0}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:repeat(4,1fr)}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand span{font-size:17px;font-weight:600;color:#F8F5F0}
.footer-col h4{font-size:15px;color:#F8F5F0;margin-bottom:18px;font-weight:600}
.footer-col p,.footer-col li{font-size:14px;color:rgba(255,255,255,.66);line-height:2}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col a{color:rgba(255,255,255,.66);display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--accent);transform:translateX(2px)}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6);
}
@media(max-width:767px){.footer-bottom{flex-direction:column}}

/* ---------- back to top ---------- */
.back-top{
  position:fixed;right:20px;bottom:24px;width:40px;height:40px;border-radius:50%;
  background:#fff;border:1px solid var(--line);color:var(--ink-2);cursor:pointer;
  display:flex;align-items:center;justify-content:center;z-index:70;
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s,background-color .2s ease,color .2s ease;
  box-shadow:var(--shadow-flat);
}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:var(--ink-2);color:#fff;border-color:var(--ink-2)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.2,.7,.2,1),transform .48s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --ink:#10201D;
  --ink-2:#16332E;
  --ink-3:#2E3B37;
  --body:#4A4642;
  --muted:#7A756E;
  --accent:#C9552E;
  --accent-soft:#F3E4DC;
  --jade:#7D9A93;
  --jade-soft:#E8EFEC;
  --paper:#F8F5F0;
  --card:#FFFFFF;
  --line:#E6E2DA;
  --r-card:14px;
  --r-btn:10px;
  --r-img:18px;
  --sh-1:0 1px 2px rgba(16,32,29,.05);
  --sh-2:0 12px 28px -18px rgba(16,32,29,.28);
  --serif:'Songti SC','Source Han Serif SC','Noto Serif SC',serif;
  --sans:-apple-system,'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--body);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink-2);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--accent)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:600;letter-spacing:.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
svg{flex:none}
:focus-visible{outline:2px solid var(--jade);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
@media(min-width:1024px){.container{padding:0 40px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 8px 22px -18px rgba(16,32,29,.45)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:60px}
@media(min-width:768px){.header-inner{height:72px;gap:24px}}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-text{
  font-size:15px;font-weight:600;color:var(--ink);line-height:1.2;
  letter-spacing:.01em;
}
@media(min-width:768px){.brand-text{font-size:18px;line-height:1.4;white-space:nowrap}}
.nav-links{display:none;align-items:center;gap:24px}
@media(min-width:768px){.nav-links{display:flex;gap:22px}}
@media(min-width:1024px){.nav-links{gap:32px}}
.nav-link{
  position:relative;
  font-size:15px;color:#3A3F3C;padding:8px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left center;
  transition:transform .18s ease;
}
.nav-link:hover{color:var(--ink-2)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink-2);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:none}
.search-box{
  display:none;align-items:center;gap:8px;height:40px;width:220px;
  padding:0 16px;border-radius:999px;background:var(--paper);
  border:1px solid var(--line);transition:border-color .18s ease,box-shadow .18s ease;
}
.search-box input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14px;color:var(--body);font-family:inherit;
}
.search-box input::placeholder{color:var(--muted)}
.search-box:focus-within{border-color:var(--ink-2);box-shadow:0 0 0 2px rgba(125,154,147,.45)}
@media(min-width:1024px){.search-box{display:flex;width:240px}}
.header-cta{display:none}
@media(min-width:768px){.header-cta{display:inline-flex}}
.menu-toggle{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 10px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-btn);cursor:pointer;
}
@media(min-width:768px){.menu-toggle{display:none}}
.menu-toggle span{display:block;height:1.5px;background:var(--ink-2);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.menu-toggle.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menu-toggle.open span:nth-child(2){opacity:0}
.menu-toggle.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.mobile-drawer{
  display:none;position:fixed;left:0;right:0;top:60px;bottom:0;z-index:49;
  background:#fff;padding:20px;flex-direction:column;gap:6px;overflow-y:auto;
  border-top:1px solid var(--line);
}
.mobile-drawer.open{display:flex}
.mobile-drawer .drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 4px;font-size:16px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.mobile-drawer .drawer-actions{display:flex;gap:12px;margin-top:20px}
.mobile-drawer .drawer-actions .btn{flex:1}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;background:transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .12s ease;
}
.btn:active{transform:scale(.98)}
.btn .arrow{transition:transform .2s ease}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{background:var(--ink-2);color:#fff;border-color:var(--ink-2)}
.btn-primary:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-ghost{border-color:var(--ink-2);color:var(--ink-2)}
.btn-ghost:hover{background:rgba(22,51,46,.1);border-color:var(--accent);color:var(--accent)}
.btn-light{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.btn-light:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-outline-light{border-color:rgba(255,255,255,.35);color:#F3EFE8}
.btn-outline-light:hover{background:rgba(255,255,255,.1);color:#fff}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn-lg{height:52px;padding:0 32px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink-2);
  border-bottom:1px solid transparent;transition:border-color .18s ease,color .18s ease;
}
.text-link:hover{color:var(--accent);border-bottom-color:var(--accent)}
.text-link .arrow{transition:transform .2s ease}
.text-link:hover .arrow{transform:translateX(4px)}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--muted);
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:#C9C3BA}
.breadcrumb .current{color:var(--ink-3)}

/* ---------- article head ---------- */
.article-head{padding:28px 0 0}
@media(min-width:768px){.article-head{padding:36px 0 0}}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  font-size:12px;letter-spacing:.12em;font-weight:500;
  border:1px solid var(--accent);color:var(--accent);border-radius:4px;background:transparent;
}
.badge-jade{border-color:var(--jade);color:var(--ink-2);background:var(--jade-soft)}
.article-title{
  font-family:var(--serif);
  font-size:clamp(1.9rem,4vw,2.6rem);
  line-height:1.25;color:var(--ink);
  margin:18px 0 0;
  word-break:break-word;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:18px;font-size:14px;color:var(--muted);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#CFC9C0}
.rule{height:1px;background:var(--line);border:0;margin:24px 0 0}

.article-shell{padding:36px 0 72px}
@media(min-width:768px){.article-shell{padding:48px 0 96px}}
.article-layout{display:grid;grid-template-columns:1fr;gap:48px}
@media(min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 180px;gap:56px}
  .article-main{max-width:760px;margin:0 auto}
}
.article-main{min-width:0}
.article-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 20px;
}
@media(min-width:768px){.article-card{padding:44px 40px}}

/* ---------- article body ---------- */
.article-body{font-size:17px;line-height:1.95;color:#2E2C29}
@media(max-width:767px){.article-body{font-size:16px}}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.4em}
.article-body h2{
  position:relative;font-family:var(--serif);font-size:24px;line-height:1.4;
  color:var(--ink);margin:2.2em 0 .8em;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.35em;width:3px;height:1.05em;background:var(--accent);
}
.article-body h3{font-size:19px;line-height:1.5;color:var(--ink-2);margin:1.8em 0 .6em}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.5em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:.5em;line-height:1.9}
.article-body li::marker{color:var(--accent)}
.article-body blockquote{
  margin:0 0 1.4em;padding:16px 20px;background:var(--paper);
  border-left:3px solid var(--accent);border-radius:0 8px 8px 0;
  color:var(--body);font-style:normal;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:1.6em auto}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;
  border:1px solid var(--line);
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;line-height:1.7}
.article-body th{background:var(--paper);color:var(--ink-2);font-weight:600}
.article-body a{color:var(--ink-2);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--accent)}
.article-body code{
  font-size:.92em;background:var(--paper);border:1px solid var(--line);
  border-radius:4px;padding:1px 6px;
}
.article-body hr{border:0;height:1px;background:var(--line);margin:2.2em 0}

.article-empty{
  padding:64px 0;text-align:center;color:var(--muted);
  display:flex;flex-direction:column;align-items:center;gap:16px;
}
.article-empty p{font-size:14px}

/* ---------- toc ---------- */
.toc-aside{display:none}
@media(min-width:1280px){
  .toc-aside.show{display:block;position:sticky;top:96px;align-self:start}
}
.toc-title{font-size:13px;letter-spacing:.12em;color:var(--muted);margin-bottom:14px}
.toc-list{display:flex;flex-direction:column;gap:10px;border-left:1px solid var(--line);padding-left:14px}
.toc-list a{
  font-size:13px;line-height:1.6;color:var(--muted);
  border-left:2px solid transparent;margin-left:-16px;padding-left:14px;
}
.toc-list a:hover{color:var(--ink-2);border-left-color:var(--accent)}

/* ---------- article footer ---------- */
.article-foot{margin-top:40px;padding-top:28px;border-top:1px solid var(--line)}
.tags{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  font-size:12px;letter-spacing:.12em;padding:5px 10px;border-radius:4px;
  border:1px solid var(--accent);color:var(--accent);
}
.foot-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ---------- section heads ---------- */
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px}
.section-title{font-family:var(--serif);font-size:28px;line-height:1.3;color:var(--ink)}
@media(min-width:1024px){.section-title{font-size:34px}}
.section-sub{margin-top:10px;font-size:15px;color:var(--muted)}
.section-rule{height:1px;background:var(--line);margin-top:22px}

/* ---------- entry cards ---------- */
.entry-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:32px}
@media(min-width:768px){.entry-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}}
.entry-card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.entry-card:hover{transform:translateY(-2px);border-color:rgba(201,85,46,.35);box-shadow:var(--sh-2)}
.entry-card .thumb{overflow:hidden;aspect-ratio:16/9;background:var(--paper)}
.entry-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.entry-card:hover .thumb img{transform:scale(1.03)}
.entry-card .body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:12px}
.entry-card h3{font-size:19px;line-height:1.45;color:var(--ink)}
.entry-card p{font-size:14px;line-height:1.8;color:var(--body)}
.entry-card .more{font-size:14px;font-weight:600;color:var(--ink-2);display:inline-flex;align-items:center;gap:6px}
.entry-card:hover .more{color:var(--accent)}

/* ---------- cta band ---------- */
.cta-band{position:relative;background:var(--ink);color:#F3EFE8;padding:64px 0;overflow:hidden}
@media(min-width:1024px){.cta-band{padding:96px 0}}
.cta-band::before{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;
  border:1px solid rgba(255,255,255,.06);border-radius:24px;
}
.cta-band::after{
  content:"";position:absolute;left:-60px;bottom:-90px;width:220px;height:220px;
  border:1px solid rgba(255,255,255,.06);border-radius:20px;
}
.cta-inner{position:relative;z-index:1}
.cta-title{font-family:var(--serif);font-size:28px;line-height:1.3;color:#F8F5F0;max-width:16ch}
@media(min-width:1024px){.cta-title{font-size:38px}}
.cta-sub{margin-top:16px;font-size:16px;color:rgba(255,255,255,.72);max-width:30ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.cta-note{margin-top:20px;font-size:13px;color:rgba(255,255,255,.6)}
@media(max-width:767px){
  .cta-inner{text-align:center}
  .cta-title,.cta-sub{margin-left:auto;margin-right:auto}
  .cta-actions{justify-content:center}
}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#F3EFE8;padding:48px 0 0}
@media(min-width:1024px){.site-footer{padding:64px 0 0}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.footer-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:600;color:#F8F5F0;line-height:1.4}
.footer-col p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.68);margin-top:14px;max-width:34ch}
.footer-col h4{font-size:14px;letter-spacing:.12em;color:#F8F5F0;margin-bottom:16px;font-weight:600}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col li a{font-size:14px;color:rgba(255,255,255,.68);display:inline-block;transition:color .18s ease,transform .18s ease}
.footer-col li a:hover{color:var(--accent);transform:translateX(2px)}
.footer-col li p{font-size:14px;color:rgba(255,255,255,.68);margin-top:0}
.footer-bottom{
  margin-top:40px;padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- to top ---------- */
.to-top{
  position:fixed;right:20px;bottom:20px;z-index:60;
  width:40px;height:40px;border-radius:50%;background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  opacity:0;pointer-events:none;transition:opacity .2s ease,box-shadow .2s ease;
  box-shadow:var(--sh-1);
}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{box-shadow:var(--sh-2)}
@media(min-width:1024px){.to-top{right:32px;bottom:32px}}
@media(max-width:767px){.to-top{bottom:16px}}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.2,.7,.2,1),transform .48s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink:#10201D;
  --ink-2:#16332E;
  --ink-3:#2E3B37;
  --body:#4A4642;
  --muted:#7A756E;
  --accent:#C9552E;
  --accent-soft:#F3E4DC;
  --jade:#7D9A93;
  --jade-soft:#E8EFEC;
  --paper:#F8F5F0;
  --card:#FFFFFF;
  --line:#E6E2DA;
  --r-card:14px;
  --r-btn:10px;
  --r-img:18px;
  --r-badge:4px;
  --sh-1:0 1px 2px rgba(16,32,29,.05);
  --sh-2:0 12px 28px -18px rgba(16,32,29,.28);
  --serif:'Songti SC','Source Han Serif SC','Noto Serif SC',serif;
  --ui:-apple-system,'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--ui);font-size:17px;line-height:1.9;color:var(--body);background:var(--paper);-webkit-font-smoothing:antialiased}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:var(--ink-2);text-decoration:none;transition:color .18s ease}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);margin:0;line-height:1.25;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--jade);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}
@media (min-width:1024px){.container{padding:0 40px}}

/* 导航 */
.site-header{position:sticky;top:0;z-index:50;background:#FFFFFF;border-bottom:1px solid var(--line);box-shadow:var(--sh-1);transition:box-shadow .2s ease}
.site-header.is-scrolled{box-shadow:0 8px 20px -14px rgba(16,32,29,.38)}
.nav-wrap{display:flex;align-items:center;gap:20px;height:60px}
@media (min-width:768px){.nav-wrap{height:72px;gap:28px}}
.brand{display:flex;align-items:center;gap:9px;color:var(--ink);font-family:var(--serif);font-size:15px;font-weight:600;white-space:nowrap;letter-spacing:.01em}
@media (min-width:768px){.brand{font-size:17px}}
@media (min-width:1024px){.brand{font-size:18px}}
.brand svg{flex:0 0 auto}
.nav-links{display:none;align-items:center;gap:20px;margin-left:6px}
@media (min-width:768px){.nav-links{display:flex}}
@media (min-width:1024px){.nav-links{gap:32px;margin-left:14px}}
.nav-link{position:relative;font-size:14px;color:#3A3F3C;padding:6px 0;white-space:nowrap}
@media (min-width:1024px){.nav-link{font-size:15px}}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .18s ease}
.nav-link:hover{color:var(--ink-2)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink-2);font-weight:600}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
@media (min-width:1024px){.nav-actions{gap:14px}}
.nav-search{display:none;align-items:center;gap:8px;height:40px;padding:0 16px;border-radius:999px;background:var(--paper);border:1px solid var(--line);width:220px;transition:border-color .18s ease,box-shadow .18s ease}
@media (min-width:1024px){.nav-search{display:flex}}
.nav-search:focus-within{border-color:var(--ink-2);box-shadow:0 0 0 2px var(--jade)}
.nav-search input{border:0;background:transparent;outline:none;font-size:14px;width:100%;color:var(--ink);font-family:var(--ui)}
.nav-search input::placeholder{color:var(--muted)}
.menu-toggle{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:10px;background:none;border:0;cursor:pointer}
.menu-toggle span{display:block;height:1.5px;width:100%;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
@media (min-width:768px){.menu-toggle{display:none}}
.mobile-drawer{position:fixed;left:0;right:0;top:60px;bottom:0;background:#FFFFFF;z-index:49;display:none;flex-direction:column;padding:20px 20px 32px;overflow-y:auto}
.mobile-drawer.open{display:flex}
@media (min-width:768px){.mobile-drawer{display:none !important}}
.mobile-drawer .d-link{display:block;padding:16px 4px;font-size:17px;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-drawer .d-link.active{color:var(--accent);font-weight:600}
.mobile-drawer .d-actions{margin-top:auto;display:grid;gap:12px;padding-top:28px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 28px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .15s ease;white-space:nowrap}
.btn .arw{transition:transform .2s ease}
.btn:hover .arw{transform:translateX(4px)}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--ink-2);color:#FFFFFF}
.btn-primary:hover{background:var(--accent);color:#FFFFFF}
.btn-ghost{background:transparent;border-color:var(--ink-2);color:var(--ink-2)}
.btn-ghost:hover{background:rgba(22,51,46,.1);border-color:var(--accent);color:var(--accent)}
.btn-light{background:var(--paper);color:var(--ink)}
.btn-light:hover{background:var(--accent);color:#FFFFFF}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.35);color:var(--paper)}
.btn-outline-light:hover{background:rgba(255,255,255,.1);color:#FFFFFF}
.btn-lg{height:52px}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
@media (min-width:1024px){.btn-sm{padding:0 22px}}

/* 面包屑 */
.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:18px;line-height:1.7}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{margin:0 8px;color:#C7C1B6}

/* 页头 */
.page-head{background:var(--paper);padding:28px 0 64px;border-bottom:1px solid var(--line)}
@media (min-width:1024px){.page-head{padding:36px 0 88px}}
.page-head-grid{display:grid;gap:32px;align-items:center}
@media (min-width:1024px){.page-head-grid{grid-template-columns:minmax(0,40%) minmax(0,1fr);gap:56px}}
.page-head-media img{width:100%;height:240px;object-fit:cover;border-radius:14px;border:1px solid var(--line);transition:transform .6s cubic-bezier(.2,.7,.2,1)}
@media (min-width:1024px){.page-head-media img{height:300px}}
.page-head-media:hover img{transform:scale(1.03)}
.page-head h1{font-size:clamp(2rem,4.4vw,3rem);line-height:1.2;margin-bottom:16px}
.page-head .lead{font-size:17px;color:var(--body);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.tag-list{list-style:none;display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag-list li{font-size:13px;color:var(--ink-2);background:var(--jade-soft);border-radius:var(--r-badge);padding:6px 12px;letter-spacing:.02em}

/* 板块 */
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:104px 0}}
.section-white{background:#FFFFFF}
.section-head{margin-bottom:36px}
@media (min-width:1024px){.section-head{margin-bottom:48px}}
.section-head h2{font-size:clamp(1.6rem,3vw,2.1rem)}
.section-head p{margin-top:12px;color:var(--muted);font-size:16px;max-width:660px}
.rule{width:120px;height:1px;background:var(--line);margin:26px 0}

/* 对照块 */
.compare-grid{display:grid;gap:20px}
@media (min-width:768px){.compare-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.compare-card{background:#FFFFFF;border:1px solid var(--line);border-radius:12px;padding:24px;transition:border-color .2s ease,transform .2s ease}
.compare-card:hover{border-color:rgba(201,85,46,.35);transform:translateY(-2px)}
.compare-card h3{font-size:18px;margin-bottom:16px;padding-left:12px;border-left:3px solid var(--accent)}
.compare-card ul{list-style:none}
.compare-card li{position:relative;padding-left:22px;font-size:15px;line-height:1.85;color:var(--body);margin-bottom:10px}
.compare-card li:last-child{margin-bottom:0}
.compare-card li::before{content:"";position:absolute;left:0;top:.68em;width:8px;height:8px;border:1.5px solid var(--jade);border-radius:2px}

/* 步骤条 */
.step-bar{display:grid;gap:26px;margin-top:40px}
@media (min-width:768px){.step-bar{grid-template-columns:repeat(3,minmax(0,1fr));gap:0}}
.step-item{position:relative;display:flex;gap:14px;align-items:flex-start}
@media (min-width:768px){.step-item{flex-direction:column;gap:16px;padding-right:48px;align-items:flex-start}}
@media (min-width:768px){.step-item:not(:last-child)::after{content:"";position:absolute;top:20px;left:60px;right:8px;height:1px;background:var(--line)}}
.step-dot{position:relative;z-index:1;flex:0 0 40px;width:40px;height:40px;border-radius:50%;background:var(--accent);color:#FFFFFF;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:600;font-family:var(--ui)}
.step-item h3{font-size:18px;margin-bottom:8px}
.step-item p{font-size:15px;line-height:1.8;color:var(--muted)}

/* 统计 */
.stat-row{display:grid;gap:16px;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:36px}
@media (min-width:768px){.stat-row{grid-template-columns:repeat(3,minmax(0,1fr))}}
.stat{background:#FFFFFF;border:1px solid var(--line);border-radius:12px;padding:20px}
.section-white .stat{background:var(--paper)}
.stat b{display:block;font-family:var(--serif);font-size:32px;color:var(--ink-2);line-height:1.1;margin-bottom:6px}
.stat span{font-size:14px;color:var(--muted);line-height:1.7}

/* 清单 */
.check-list{list-style:none;display:grid;gap:14px}
@media (min-width:768px){.check-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
.check-list li{background:#FFFFFF;border:1px solid var(--line);border-radius:12px;padding:16px 18px;font-size:15px;line-height:1.8;transition:border-color .2s ease,transform .2s ease}
.check-list li:hover{border-color:rgba(201,85,46,.35);transform:translateY(-2px)}
.check-list strong{color:var(--ink);font-weight:600;display:block;margin-bottom:4px;font-size:15px}

/* FAQ */
.faq-list{display:grid;gap:12px}
.faq-item{background:#FFFFFF;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.open{border-color:rgba(201,85,46,.4);box-shadow:inset 3px 0 0 var(--accent)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;background:none;border:0;text-align:left;font-size:17px;font-weight:500;color:var(--ink);cursor:pointer;line-height:1.6;font-family:var(--ui)}
.faq-item.open .faq-q{color:var(--ink-2)}
.faq-icon{position:relative;flex:0 0 16px;width:16px;height:16px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink-2)}
.faq-icon::before{left:0;right:0;top:50%;height:1.5px;transform:translateY(-50%)}
.faq-icon::after{top:0;bottom:0;left:50%;width:1.5px;transform:translateX(-50%);transition:transform .2s ease,opacity .2s ease}
.faq-item.open .faq-icon::after{transform:translateX(-50%) rotate(90deg);opacity:0}
.faq-a{max-height:0;opacity:0;overflow:hidden;transition:max-height .24s ease,opacity .24s ease,padding .24s ease;padding:0 20px}
.faq-item.open .faq-a{max-height:460px;opacity:1;padding:0 20px 20px}
.faq-a p{font-size:15px;line-height:1.9;color:var(--body)}

/* 内链 */
.link-list{list-style:none;border-top:1px solid var(--line)}
.link-list li{border-bottom:1px dashed var(--line)}
.link-item{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 4px;font-size:17px;color:var(--ink);font-weight:500}
.link-item small{display:block;font-size:14px;font-weight:400;color:var(--muted);margin-top:4px}
.link-item:hover{color:var(--accent)}
.link-item .arw{transition:transform .2s ease;color:var(--accent)}
.link-item:hover .arw{transform:translateX(4px)}

/* CTA */
.cta-band{position:relative;background:var(--ink);color:var(--paper);padding:64px 0;overflow:hidden}
@media (min-width:1024px){.cta-band{padding:96px 0}}
.cta-band::before{content:"";position:absolute;inset:22px;border:1px solid rgba(255,255,255,.06);border-radius:16px;pointer-events:none}
.cta-band h2{color:#F8F5F0;font-size:clamp(1.6rem,3vw,2.1rem)}
.cta-band .cta-sub{margin-top:14px;font-size:16px;color:rgba(255,255,255,.72);max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.cta-foot{margin-top:20px;font-size:13px;color:rgba(255,255,255,.6)}
@media (max-width:767px){.cta-band{text-align:center}.cta-band .cta-sub{margin-left:auto;margin-right:auto}.cta-actions{justify-content:center}}

/* 页脚 */
.site-footer{background:var(--ink);color:#F3EFE8;padding-top:48px}
@media (min-width:1024px){.site-footer{padding-top:64px}}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr;padding-bottom:48px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.footer-brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:16px;font-weight:600;color:#F8F5F0;margin-bottom:14px}
.footer-col h4{font-size:15px;color:#F8F5F0;margin-bottom:16px;letter-spacing:.06em;font-weight:600}
.footer-col p{font-size:14px;color:rgba(255,255,255,.72);line-height:1.85;margin-bottom:8px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{display:inline-block;font-size:14px;color:rgba(255,255,255,.72);transition:color .18s ease,transform .18s ease}
.footer-col a:hover{color:var(--accent);transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6)}

/* 返回顶部 */
.to-top{position:fixed;right:20px;bottom:24px;width:40px;height:40px;border-radius:50%;background:#FFFFFF;border:1px solid var(--line);box-shadow:var(--sh-1);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:40;opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease}
.to-top.show{opacity:1;visibility:visible}

.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.2,.7,.2,1),transform .48s cubic-bezier(.2,.7,.2,1)}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .compare-card:hover,.check-list li:hover,.page-head-media:hover img{transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink:#10201D;
  --ink-2:#16332E;
  --ink-3:#2E3B37;
  --body-c:#4A4642;
  --muted:#7A756E;
  --accent:#C9552E;
  --accent-soft:#F3E4DC;
  --jade:#7D9A93;
  --jade-soft:#E8EFEC;
  --paper:#F8F5F0;
  --paper-deep:#F4F1EB;
  --card:#FFFFFF;
  --line:#E6E2DA;
  --r-card:14px;
  --r-btn:10px;
  --r-img:18px;
  --sh-1:0 1px 2px rgba(16,32,29,.05);
  --sh-2:0 12px 28px -18px rgba(16,32,29,.28);
  --serif:'Songti SC','Source Han Serif SC','Noto Serif SC',serif;
  --sans:-apple-system,'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html body{
  margin:0;
  padding:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.9;
  color:var(--body-c);
  background:var(--paper);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
html body p{margin:0 0 14px;line-height:1.9}
html body a{color:var(--ink-2);text-decoration:none;transition:color .2s}
html body img{display:block;max-width:100%;height:auto}
html body ul,html body ol{margin:0;padding:0;list-style:none}
html body h1,html body h2,html body h3,html body h4{margin:0;font-family:var(--serif);font-weight:600;color:var(--ink);line-height:1.3}
html body button{font-family:var(--sans)}
html body input,html body textarea{font-family:var(--sans)}

/* 容器 */
html body .container{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
@media (min-width:768px){html body .container{padding:0 32px}}
@media (min-width:1024px){html body .container{padding:0 40px}}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:50;background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
  transition:box-shadow .24s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 22px -16px rgba(16,32,29,.45)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-icon{flex-shrink:0}
.brand-text{font-size:18px;font-weight:600;color:var(--ink);white-space:nowrap;letter-spacing:.01em}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-link{position:relative;display:inline-block;padding:6px 0;font-size:15px;color:#3A3F3C}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.nav-link:hover{color:var(--ink-2)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink-2);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;height:40px;width:220px;padding:0 16px;
  border:1px solid var(--line);border-radius:999px;background:var(--paper);
  transition:border-color .2s,box-shadow .2s;
}
.search-box:focus-within{border-color:var(--ink-2);box-shadow:0 0 0 2px rgba(125,154,147,.35)}
.search-box input{width:100%;border:0;outline:0;background:transparent;font-size:14px;color:var(--ink-3)}
.search-box input::placeholder{color:var(--muted)}
.search-icon{flex-shrink:0}
.menu-toggle{
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;
  transition:border-color .2s;
}
.menu-toggle:hover{border-color:var(--accent)}
.menu-toggle span{display:block;width:18px;height:1.5px;background:var(--ink-2);transition:transform .2s ease,opacity .2s ease}
.menu-toggle.is-open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.mobile-drawer{
  max-height:0;overflow:hidden;background:#fff;border-top:1px solid transparent;
  transition:max-height .28s ease,border-color .28s ease;
}
.mobile-drawer.is-open{max-height:460px;border-top-color:var(--line)}
.drawer-inner{display:flex;flex-direction:column;gap:16px;padding-top:16px;padding-bottom:24px}
.drawer-link{display:block;padding:12px 0;font-size:16px;color:#3A3F3C;border-bottom:1px solid var(--line)}
.drawer-link.active{color:var(--ink-2);font-weight:600}
.drawer-actions{display:flex;gap:12px;flex-wrap:wrap}
.drawer-actions .btn{flex:1 1 140px}
@media (max-width:1023px){.search-box{display:none}}
@media (max-width:767px){
  .nav-links{display:none}
  .header-actions .btn{display:none}
  .header-inner{height:60px}
  .brand-text{font-size:15px}
  .menu-toggle{display:flex}
}
@media (min-width:768px){.mobile-drawer{display:none}}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;font-family:var(--sans);cursor:pointer;
  transition:background-color .2s,color .2s,border-color .2s,transform .12s;
}
.btn:active{transform:scale(.98)}
.btn:focus-visible{outline:2px solid var(--jade);outline-offset:2px}
.btn-primary{background:var(--ink-2);color:#fff}
.btn-primary:hover{background:var(--accent);color:#fff}
.btn-outline{background:transparent;border-color:var(--ink-2);color:var(--ink-2)}
.btn-outline:hover{background:rgba(22,51,46,.08);border-color:var(--accent);color:var(--accent)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-light{background:var(--paper);color:var(--ink)}
.btn-light:hover{background:var(--accent);color:#fff}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.35);color:var(--paper)}
.btn-outline-light:hover{background:rgba(255,255,255,.1);color:#fff}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn-lg{height:52px;padding:0 30px}
.btn-block{width:100%}
.btn-arrow{transition:transform .2s}
.btn:hover .btn-arrow{transform:translateX(4px)}

/* 面包屑 */
.crumb-bar{background:var(--paper);border-bottom:1px solid var(--line)}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:14px 0;font-size:14px;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}
.crumb-sep{color:#C9C3B9}
.crumb-current{color:var(--ink-3)}

/* 分类页头横幅 */
.cat-banner{position:relative;background:var(--paper-deep);overflow:hidden}
.cat-banner-bg{
  position:absolute;inset:0;pointer-events:none;opacity:.12;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.cat-banner-inner{
  position:relative;z-index:2;min-height:280px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding-top:56px;padding-bottom:56px;
}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:.3em;color:var(--jade);
  margin-bottom:14px;font-weight:500;
}
.cat-title{font-size:clamp(2rem,4.4vw,2.9rem);line-height:1.2;color:var(--ink)}
.cat-sub{margin:16px 0 0;max-width:660px;font-size:17px;color:var(--body-c)}

/* 通用板块 */
.section{padding:96px 0}
.section-alt{background:#fff}
.section-head{max-width:780px;margin-bottom:44px}
.h2{font-size:clamp(1.65rem,3vw,2.5rem)}
.h3{font-size:22px}
.section-lead{margin:12px 0 0;font-size:16px;color:var(--muted)}
@media (max-width:1023px){
  .section{padding:64px 0}
  .section-head{margin-bottom:32px}
}

/* 办理要点 */
.points-layout{display:grid;grid-template-columns:1fr;gap:40px}
@media (min-width:1024px){.points-layout{grid-template-columns:1.35fr 1fr;gap:56px;align-items:start}}
.points-list{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:640px){.points-list{grid-template-columns:1fr 1fr;gap:32px}}
.point-item{padding-left:18px;border-left:3px solid var(--jade-soft);transition:border-color .2s}
.point-item:hover{border-left-color:var(--accent)}
.point-item h3{font-size:19px;margin-bottom:6px}
.point-item p{margin:0;font-size:15px;color:var(--body-c)}
.points-figure{margin:0}
.figure-img{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:#fff}
.figure-img img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .6s ease}
.figure-img:hover img{transform:scale(1.03)}
.points-figure figcaption{margin-top:12px;font-size:13px;color:var(--muted);text-align:center}

/* 时间线与侧卡 */
.timeline-layout{display:grid;grid-template-columns:1fr;gap:40px}
@media (min-width:1024px){.timeline-layout{grid-template-columns:1fr 320px;gap:64px;align-items:start}}
.timeline{position:relative;padding-left:28px}
.timeline::before{content:"";position:absolute;left:5px;top:10px;bottom:10px;width:1px;background:var(--line)}
.tl-item{position:relative;padding-bottom:40px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{
  position:absolute;left:-28px;top:7px;width:11px;height:11px;border-radius:50%;
  background:#fff;border:2px solid var(--accent);
}
.tl-title{font-size:18px;margin-bottom:8px}
.tl-body p{font-size:15px;margin:0 0 6px;color:var(--body-c)}
.tl-body p:last-child{margin-bottom:0;color:var(--muted)}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-1);
}
@media (min-width:1024px){.side-card{position:sticky;top:96px}}
.side-card-title{font-size:18px;margin-bottom:16px}
.side-list{display:flex;flex-direction:column;gap:12px;margin-bottom:22px}
.side-list li{position:relative;padding-left:16px;font-size:15px;color:var(--body-c);line-height:1.8}
.side-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--jade);
}
.side-note{margin:14px 0 0;font-size:13px;color:var(--muted);text-align:center}

/* 账号服务 */
.service-list{display:grid;grid-template-columns:1fr}
.service-item{padding:22px 0;border-top:1px solid var(--line)}
.service-item:first-child{border-top:0;padding-top:0}
@media (min-width:768px){
  .service-list{grid-template-columns:1fr 1fr;column-gap:40px}
}
@media (min-width:1024px){
  .service-list{grid-template-columns:repeat(4,1fr);column-gap:0}
  .service-item{border-top:0;border-left:1px solid var(--line);padding:4px 26px}
  .service-item:first-child{border-left:0;padding-left:0}
}
.service-title{font-size:18px;margin-bottom:8px}
.service-item p{margin:0;font-size:15px;color:var(--body-c)}

/* 常见问题 */
.faq-layout{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:1024px){
  .faq-layout{grid-template-columns:4fr 8fr;gap:64px;align-items:start}
  .faq-aside{position:sticky;top:96px}
}
.faq-aside p{font-size:15px;color:var(--muted);margin:12px 0 24px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;
  transition:border-color .2s,box-shadow .2s;
}
.faq-item.is-open{border-color:rgba(201,85,46,.4);box-shadow:var(--sh-2)}
.faq-q{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  padding:18px 20px;border:0;background:none;text-align:left;cursor:pointer;
  font-size:17px;font-weight:500;color:var(--ink);line-height:1.6;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent);
  transform:scaleY(0);transform-origin:top;transition:transform .24s ease;
}
.faq-item.is-open .faq-q::before{transform:scaleY(1)}
.faq-item.is-open .faq-q{color:var(--ink-2)}
.faq-icon{position:relative;flex-shrink:0;width:14px;height:14px;transition:transform .2s ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink-2)}
.faq-icon::before{left:0;top:6.5px;width:14px;height:1px}
.faq-icon::after{left:6.5px;top:0;width:1px;height:14px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .24s ease,opacity .24s ease}
.faq-item.is-open .faq-a{opacity:1}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.9;color:var(--body-c)}
.faq-a-inner p:last-child{margin-bottom:0}

/* 文字内链 */
.text-links{display:flex;flex-direction:column;max-width:820px}
.text-links a{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 4px;font-size:17px;color:var(--ink-2);
  border-bottom:1px dashed var(--line);transition:color .2s,padding-left .2s;
}
.text-links li:first-child a{border-top:1px dashed var(--line)}
.text-links a:hover{color:var(--accent);padding-left:10px}
.text-links .arrow{transition:transform .2s}
.text-links a:hover .arrow{transform:translateX(4px)}

/* 深色 CTA */
.cta-band{position:relative;background:var(--ink);padding:96px 0;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;left:24px;right:24px;top:24px;bottom:24px;
  border:1px solid rgba(255,255,255,.06);border-radius:20px;pointer-events:none;
}
.cta-inner{position:relative;z-index:2;max-width:720px}
.cta-title{color:#fff;font-size:clamp(1.5rem,2.6vw,2.1rem);margin-bottom:14px}
.cta-sub{color:rgba(255,255,255,.72);font-size:16px;margin:0 0 28px}
.cta-actions{display:flex;gap:16px;flex-wrap:wrap}
.cta-note{margin:24px 0 0;font-size:13px;color:rgba(255,255,255,.55)}
@media (max-width:767px){
  .cta-band{padding:64px 0;text-align:center}
  .cta-actions{justify-content:center}
}

/* 页脚 */
.site-footer{background:var(--ink);color:#F3EFE8;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;font-size:17px;font-weight:600;color:#fff}
.footer-col h4{font-family:var(--sans);font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.68);margin:0 0 8px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{display:inline-block;font-size:14px;color:rgba(255,255,255,.72);transition:color .2s,transform .2s}
.footer-col ul a:hover{color:var(--accent);transform:translateX(2px)}
html body .footer-grid{padding-bottom:48px}
html body .footer-bottom{
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;
  padding-top:20px;padding-bottom:28px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.6);
}
@media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.3fr 1fr 1fr 1fr;gap:40px}}
@media (max-width:767px){.site-footer{padding-top:48px}}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:40;width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);
  box-shadow:var(--sh-1);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s,transform .2s,visibility .2s,border-color .2s;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--accent)}
@media (max-width:767px){.to-top{right:16px;bottom:16px}}

/* 入场 */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .48s cubic-bezier(.2,.7,.2,1),transform .48s cubic-bezier(.2,.7,.2,1);
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
  *,*::before,*::after{transition:none !important;animation:none !important}
}