/* roulang page: index */
:root{
  --ink-900:#12100E;
  --ink-700:#2E2B27;
  --ink-500:#6B665E;
  --ink-300:#A9A399;
  --line:#E3DED4;
  --paper:#F7F5F1;
  --paper-2:#EFEBE3;
  --primary:#C1461E;
  --primary-d:#A63A16;
  --accent:#1F5F4F;
  --font-serif:"Noto Serif SC","Songti SC","SimSun",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --radius-card:4px;
  --radius-btn:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:700;color:var(--ink-900);margin:0;line-height:1.2;letter-spacing:-0.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:var(--primary);color:#fff;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container{padding:0 32px;}}
@media (min-width:1280px){.container{padding:0 48px;}}

.tabnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,241,.92);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),background .24s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px;transition:height .24s var(--ease);}
.site-header.is-scrolled .header-inner{height:64px;}
.brand{display:flex;align-items:baseline;gap:8px;}
.brand-mark{font-family:var(--font-serif);font-weight:700;font-size:20px;letter-spacing:.02em;color:var(--ink-900);}
.brand-sub{font-size:12.5px;letter-spacing:.14em;color:var(--ink-500);}
.nav-desktop{display:none;}
@media (min-width:1024px){
  .nav-desktop{display:flex;align-items:center;gap:6px;}
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:14px;
  letter-spacing:.04em;
  color:var(--ink-700);
  border-radius:999px;
  transition:background .24s var(--ease),color .24s var(--ease);
}
.nav-link:hover{background:var(--paper-2);color:var(--ink-900);}
.nav-link.active{color:var(--ink-900);font-weight:500;}
.nav-link.active::after{
  content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);
  width:18px;height:2px;background:var(--primary);border-radius:2px;
}
.header-cta{
  display:none;
  align-items:center;gap:6px;
  font-size:14px;letter-spacing:.04em;color:var(--ink-900);
  padding:8px 0;
}
@media (min-width:1024px){.header-cta{display:inline-flex;}}
.header-cta span.arrow{transition:transform .24s var(--ease);}
.header-cta:hover{color:var(--primary);}
.header-cta:hover span.arrow{transform:translateX(3px);}
.burger{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:40px;height:40px;padding:0;background:none;border:1px solid var(--line);border-radius:999px;cursor:pointer;
  transition:border-color .24s var(--ease);
}
.burger:hover{border-color:var(--ink-900);}
.burger i{display:block;width:16px;height:1.5px;background:var(--ink-900);margin:0 auto;transition:transform .24s var(--ease),opacity .24s var(--ease);}
.burger.open i:nth-child(1){transform:translateY(3.25px) rotate(45deg);}
.burger.open i:nth-child(2){transform:translateY(-3.25px) rotate(-45deg);}
@media (min-width:1024px){.burger{display:none;}}

.mobile-drawer{
  position:fixed;inset:0;z-index:70;
  background:var(--paper);
  padding:24px 20px 40px;
  transform:translateY(-8px);
  opacity:0;pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
  overflow-y:auto;
}
.mobile-drawer.open{opacity:1;pointer-events:auto;transform:translateY(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:52px;}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);background:none;border-radius:999px;cursor:pointer;color:var(--ink-900);font-size:18px;line-height:1;}
.drawer-nav{margin-top:24px;border-top:1px solid var(--line);}
.drawer-nav a{
  display:flex;align-items:center;gap:10px;
  padding:18px 4px;border-bottom:1px solid var(--line);
  font-size:17px;color:var(--ink-700);
}
.drawer-nav a.active{color:var(--ink-900);font-weight:500;}
.drawer-nav a.active::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--primary);}
.drawer-foot{margin-top:28px;font-size:13px;color:var(--ink-300);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 26px;
  border-radius:var(--radius-btn);
  font-size:15px;letter-spacing:.03em;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-d);transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--ink-900);transform:translateY(-2px);}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.arrow-i{transition:transform .24s var(--ease);}
.btn:hover .arrow-i{transform:translateX(3px);}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.hero-grid-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(to right,rgba(18,16,14,.06) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(18,16,14,.06) 1px,transparent 1px);
  background-size:12px 12px;
  -webkit-mask-image:radial-gradient(circle at 78% 18%,#000 0%,transparent 62%);
  mask-image:radial-gradient(circle at 78% 18%,#000 0%,transparent 62%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1fr;gap:40px;padding:64px 0 56px;}
@media (min-width:1024px){
  .hero-inner{grid-template-columns:7fr 5fr;gap:56px;padding:96px 0 80px;}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;color:var(--ink-500);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--primary);}
h1.hero-title{font-size:clamp(34px,5.4vw,62px);line-height:1.16;margin:20px 0 0;}
.hero-lead{margin-top:22px;font-size:17px;line-height:1.95;color:var(--ink-500);max-width:34em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero-trust{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-top:44px;border-top:1px solid var(--line);padding-top:22px;}
.hero-trust > div{padding:0 16px;border-left:1px solid var(--line);}
.hero-trust > div:first-child{padding-left:0;border-left:none;}
.trust-num{font-family:var(--font-serif);font-size:26px;color:var(--ink-900);}
.trust-label{font-size:12.5px;color:var(--ink-300);letter-spacing:.04em;margin-top:2px;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--radius-card);
  outline:1px solid var(--line);outline-offset:-1px;
}
.hero-media figcaption{
  margin-top:12px;font-size:13px;color:var(--ink-300);letter-spacing:.02em;
}

/* ---------- Section basics ---------- */
.section{padding:56px 0;border-bottom:1px solid var(--line);}
@media (min-width:768px){.section{padding:72px 0;}}
@media (min-width:1024px){.section{padding:100px 0;}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:40px;}
.section-title{font-size:clamp(26px,3.2vw,42px);}
.section-title::before{
  content:"";display:block;width:28px;height:3px;background:var(--primary);margin-bottom:18px;
}
.section-desc{font-size:15.5px;color:var(--ink-500);max-width:38em;}
.text-link{
  position:relative;font-size:14px;letter-spacing:.03em;color:var(--ink-900);
  display:inline-flex;align-items:center;gap:6px;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:-4px;height:1px;width:100%;background:var(--ink-900);
  transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);
}
.text-link:hover::after{transform:scaleX(1);}
.text-link:hover{color:var(--primary);}
.text-link:hover::after{background:var(--primary);}

/* ---------- Capability ---------- */
.cap-grid{display:grid;grid-template-columns:1fr;gap:40px;}
@media (min-width:1024px){.cap-grid{grid-template-columns:5fr 7fr;gap:64px;}}
.cap-aside{position:relative;}
@media (min-width:1024px){.cap-aside{position:sticky;top:110px;align-self:start;}}
.cap-list{border-top:1px solid var(--line);}
.cap-item{
  display:grid;grid-template-columns:auto 1fr;gap:20px;
  padding:26px 0;border-bottom:1px solid var(--line);
}
.cap-num{font-family:var(--font-serif);font-size:15px;color:var(--ink-300);letter-spacing:.06em;padding-top:4px;}
.cap-item h3{font-size:20px;margin-bottom:8px;}
.cap-item p{color:var(--ink-500);font-size:15.5px;max-width:36em;}
.cap-item:hover .cap-num{color:var(--primary);}

/* ---------- Data band ---------- */
.data-band{background:var(--ink-900);color:#EFEBE3;border-bottom:none;}
.data-band .section-title{color:#F7F5F1;}
.data-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;}
@media (min-width:768px){.data-grid{grid-template-columns:repeat(4,minmax(0,1fr));}}
.data-cell{padding:28px 20px;border-top:1px solid rgba(255,255,255,.12);}
@media (min-width:768px){
  .data-cell{border-top:none;border-left:1px solid rgba(255,255,255,.12);padding:8px 24px;}
  .data-cell:first-child{border-left:none;padding-left:0;}
}
.data-num{font-family:var(--font-serif);font-size:clamp(40px,5vw,58px);color:#F7F5F1;line-height:1.1;}
.data-num em{font-style:normal;color:var(--primary);}
.data-label{margin-top:8px;font-size:13.5px;color:rgba(247,245,241,.62);letter-spacing:.04em;}

/* ---------- Timeline ---------- */
.steps{display:grid;grid-template-columns:1fr;gap:0;border-top:1px solid var(--line);}
.step{display:grid;grid-template-columns:auto 1fr;gap:20px;padding:26px 0;border-bottom:1px solid var(--line);}
.step-dot{
  width:8px;height:8px;border-radius:50%;background:var(--ink-300);margin-top:11px;
  box-shadow:0 0 0 6px var(--paper);
}
.step.is-active .step-dot{background:var(--primary);}
.step h3{font-size:19px;margin-bottom:6px;}
.step p{color:var(--ink-500);font-size:15.5px;max-width:38em;}
.step-time{font-size:12.5px;color:var(--ink-300);letter-spacing:.08em;margin-bottom:6px;}

/* ---------- Cards ---------- */
.card{
  display:flex;flex-direction:column;height:100%;
  border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--paper);
  overflow:hidden;
  transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.card:hover{border-color:var(--ink-900);transform:translateY(-2px);box-shadow:0 20px 40px -24px rgba(18,16,14,.35);}
.card-media{position:relative;overflow:hidden;}
.card-media img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .48s ease-out;}
.card:hover .card-media img{transform:scale(1.03);}
.card-badge{
  position:absolute;left:12px;top:12px;
  background:var(--ink-900);color:#F7F5F1;
  font-size:12px;letter-spacing:.06em;padding:5px 12px;border-radius:999px;
}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-meta{font-size:12.5px;color:var(--ink-300);letter-spacing:.04em;}
.card-title{font-size:19px;line-height:1.4;}
.card:hover .card-title{color:var(--primary);}
.card-excerpt{font-size:15px;color:var(--ink-500);line-height:1.85;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13.5px;color:var(--ink-900);display:flex;align-items:center;gap:6px;}
.card:hover .card-foot{color:var(--primary);}

.stagger-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media (min-width:768px){.stagger-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}}
@media (min-width:1024px){.stagger-grid > *:nth-child(2){transform:translateY(48px);}}

/* ---------- CMS news ---------- */
.news-grid{display:grid;grid-template-columns:1fr;gap:28px;}
@media (min-width:1024px){
  .news-grid{grid-template-columns:7fr 5fr;gap:40px;align-items:start;}
}
.news-side{display:grid;grid-template-columns:1fr;gap:24px;}
.news-mini{display:grid;grid-template-columns:112px 1fr;gap:16px;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:border-color .24s var(--ease),transform .24s var(--ease);}
.news-mini:hover{border-color:var(--ink-900);transform:translateY(-2px);}
.news-mini img{width:100%;height:100%;object-fit:cover;min-height:112px;}
.news-mini-body{padding:16px 18px 18px 0;display:flex;flex-direction:column;gap:6px;}
.news-mini h3{font-size:16.5px;line-height:1.45;}
.news-mini:hover h3{color:var(--primary);}
.news-mini .card-meta{font-size:12px;}
.news-mini p{font-size:14px;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.empty-state{
  border:1px solid var(--line);border-radius:var(--radius-card);
  padding:56px 24px;text-align:center;color:var(--ink-500);font-size:15px;
}
.empty-state a{margin-top:14px;display:inline-flex;color:var(--ink-900);border-bottom:1px solid var(--ink-900);}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:none;text-align:left;cursor:pointer;
  display:flex;align-items:center;gap:14px;padding:24px 0;
  font-family:var(--font-serif);font-size:18px;color:var(--ink-900);line-height:1.5;
}
@media (min-width:768px){.faq-q{font-size:19px;}}
.faq-dot{width:8px;height:8px;border-radius:50%;background:var(--ink-300);flex:0 0 auto;transition:background .24s var(--ease);}
.faq-item.open .faq-dot{background:var(--primary);}
.faq-sign{margin-left:auto;font-size:20px;line-height:1;color:var(--ink-300);transition:transform .32s var(--ease),color .24s var(--ease);}
.faq-item.open .faq-sign{transform:rotate(45deg);color:var(--primary);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
.faq-a-inner{padding:0 0 26px 28px;color:var(--ink-500);font-size:16px;line-height:1.9;max-width:52em;}

/* ---------- CTA / Form ---------- */
.cta-band{background:var(--paper-2);border-bottom:none;}
.cta-grid{display:grid;grid-template-columns:1fr;gap:44px;}
@media (min-width:1024px){.cta-grid{grid-template-columns:6fr 6fr;gap:72px;}}
.field{position:relative;margin-top:24px;}
.field label{display:block;font-size:12px;letter-spacing:.1em;color:var(--ink-500);margin-bottom:6px;}
.field input,.field select,.field textarea{
  width:100%;background:transparent;border:none;border-bottom:1px solid var(--line);
  padding:8px 0 10px;font-size:16px;color:var(--ink-900);border-radius:0;
  transition:border-color .24s var(--ease);
}
.field textarea{resize:vertical;min-height:88px;line-height:1.8;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-bottom-color:var(--primary);}
.field::before{
  content:"";position:absolute;left:-12px;top:26px;width:2px;height:22px;background:var(--primary);
  opacity:0;transition:opacity .24s var(--ease);
}
.field:focus-within::before{opacity:1;}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px;}
.chip{
  border:1px solid var(--line);border-radius:999px;padding:7px 16px;font-size:13.5px;color:var(--ink-500);
  cursor:pointer;background:transparent;transition:all .24s var(--ease);
}
.chip:hover{border-color:var(--ink-900);color:var(--ink-900);}
.chip.active{background:var(--ink-900);border-color:var(--ink-900);color:#F7F5F1;}
.form-note{margin-top:18px;font-size:13px;color:var(--ink-300);}
.form-msg{margin-top:14px;font-size:13.5px;color:var(--primary);min-height:20px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink-900);color:#EFEBE3;padding:64px 0 0;}
.footer-top{border-top:1px solid rgba(255,255,255,.12);padding-top:48px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:5fr 3fr 3fr 3fr;gap:40px;}}
.footer-brand{font-family:var(--font-serif);font-size:20px;color:#F7F5F1;letter-spacing:.02em;}
.footer-brand small{display:block;font-family:var(--font-sans);font-size:12.5px;letter-spacing:.14em;color:rgba(247,245,241,.6);margin-top:8px;}
.footer-about{margin-top:16px;font-size:14.5px;color:rgba(247,245,241,.66);line-height:1.9;max-width:30em;}
.footer-col h4{font-family:var(--font-sans);font-size:12px;letter-spacing:.12em;color:rgba(247,245,241,.55);font-weight:500;margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14.5px;color:rgba(247,245,241,.82);transition:color .24s var(--ease);}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(247,245,241,.5);
}
.footer-bottom .tabnum{letter-spacing:.02em;}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
  .card:hover,.card:hover .card-media img,.btn:hover{transform:none;}
}

/* roulang page: article */
:root{
  --ink-900:#12100E;--ink-700:#2E2B27;--ink-500:#6B665E;--ink-300:#A9A399;
  --line:#E3DED4;--paper:#F7F5F1;--paper-2:#EFEBE3;
  --primary:#C1461E;--primary-d:#A63A16;--accent:#1F5F4F;
  --r-card:4px;--r-btn:2px;--r-img:3px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-title:"Noto Serif SC","Songti SC","SimSun",serif;
  --font-body:"Noto Sans SC",-apple-system,"PingFang SC","Microsoft YaHei",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-700);font-family:var(--font-body);font-size:17px;line-height:1.9;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-family:var(--font-title);font-weight:700;color:var(--ink-900);letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.tabnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
@media(min-width:1280px){.container{padding:0 48px}}
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.section-line{border-top:1px solid var(--line)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(247,245,241,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:border-color .3s var(--ease),background .3s var(--ease)}
.site-header.is-scrolled{border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px;transition:height .3s var(--ease)}
.site-header.is-scrolled .header-inner{height:64px}
.brand{display:flex;align-items:baseline;gap:10px;min-width:0}
.brand-mark{font-family:var(--font-title);font-weight:700;font-size:19px;letter-spacing:.06em;color:var(--ink-900);white-space:nowrap}
.brand-sub{font-size:12px;letter-spacing:.14em;color:var(--ink-500);white-space:nowrap}
.nav-desktop{display:none}
@media(min-width:1024px){.nav-desktop{display:flex;align-items:center;gap:4px}}
.nav-link{position:relative;display:inline-block;padding:8px 12px;border-radius:999px;font-size:14px;letter-spacing:.04em;color:var(--ink-700);transition:background .24s var(--ease),color .24s var(--ease);white-space:nowrap}
.nav-link:hover{background:var(--paper-2);color:var(--ink-900)}
.nav-link.active{color:var(--ink-900)}
.nav-link.active::after{content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);width:18px;height:2px;background:var(--primary)}
.header-cta{display:none}
@media(min-width:1024px){
  .header-cta{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--ink-900);padding-bottom:4px;border-bottom:1px solid var(--line);transition:color .24s var(--ease),border-color .24s var(--ease);white-space:nowrap}
  .header-cta:hover{color:var(--primary);border-bottom-color:var(--primary)}
  .header-cta .arrow{display:inline-block;transition:transform .24s var(--ease)}
  .header-cta:hover .arrow{transform:translateX(3px)}
}
.burger{display:flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:0 10px;background:none;border:0;cursor:pointer}
@media(min-width:1024px){.burger{display:none}}
.burger i{display:block;width:22px;height:1.5px;background:var(--ink-900);transition:transform .3s var(--ease)}
.burger.is-open i:first-child{transform:translateY(3.25px) rotate(45deg)}
.burger.is-open i:last-child{transform:translateY(-3.25px) rotate(-45deg)}
.mobile-drawer{position:fixed;left:0;right:0;top:76px;bottom:0;z-index:55;background:var(--paper);border-top:1px solid var(--line);padding:16px 20px 40px;overflow-y:auto;opacity:0;transform:translateY(-8px);pointer-events:none;transition:opacity .28s var(--ease),transform .28s var(--ease)}
.mobile-drawer.is-open{opacity:1;transform:none;pointer-events:auto}
.mobile-drawer a{display:block;padding:15px 0;border-bottom:1px solid var(--line);font-size:16px;color:var(--ink-700)}
.mobile-drawer a:hover{color:var(--primary)}
.mobile-drawer a.active{color:var(--primary);border-left:4px solid var(--primary);padding-left:12px}
@media(min-width:1024px){.mobile-drawer{display:none}}

/* ---------- 通用组件 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border:1px solid var(--ink-900);border-radius:var(--r-btn);background:var(--ink-900);color:var(--paper);font-size:15px;letter-spacing:.02em;cursor:pointer;transition:background .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease),transform .24s var(--ease)}
.btn:hover{background:var(--primary);border-color:var(--primary);color:#FBF9F5}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
.btn-ghost{background:transparent;color:var(--ink-900)}
.btn-ghost:hover{background:var(--paper-2);border-color:var(--ink-900);color:var(--ink-900)}
.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;background:var(--ink-900);color:var(--paper);font-size:12px;letter-spacing:.08em}
.badge-accent{background:transparent;color:var(--accent);border:1px solid rgba(31,95,79,.35);letter-spacing:.1em}
.tag{display:inline-flex;align-items:center;padding:6px 14px;border:1px solid var(--line);border-radius:999px;font-size:13px;color:var(--ink-500);background:var(--paper);transition:.24s var(--ease)}
.tag:hover{border-color:var(--ink-900);color:var(--ink-900)}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 文章页头 ---------- */
.article-hero{position:relative;padding:44px 0 8px;background-color:var(--paper);background-image:linear-gradient(180deg,rgba(247,245,241,.96) 0%,rgba(247,245,241,.92) 60%,rgba(247,245,241,1) 100%),url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center right;border-bottom:1px solid var(--line)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-300);line-height:1.6}
.breadcrumb a{transition:color .24s var(--ease)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .now{color:var(--ink-500);max-width:40ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:24px;font-size:13px;color:var(--ink-300)}
.article-meta .dot{width:4px;height:4px;border-radius:999px;background:var(--line)}
.article-title{margin-top:18px;font-size:clamp(28px,4.4vw,44px);line-height:1.25;max-width:24ch}
.article-lead{margin-top:18px;max-width:66ch;font-size:16px;line-height:1.95;color:var(--ink-500)}
.article-hero-foot{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-top:28px;padding-bottom:28px;font-size:13px;color:var(--ink-300)}

/* ---------- 封面与正文 ---------- */
.article-cover{padding:40px 0 0}
.cover-frame{position:relative;border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;aspect-ratio:16/9;background:var(--paper-2)}
.cover-frame img{width:100%;height:100%;object-fit:cover}
.cover-cap{margin-top:12px;text-align:center;font-size:13px;color:var(--ink-300)}
.article-body{max-width:748px;margin:0 auto;padding:56px 0 8px}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.4em;font-size:17px;line-height:1.95;color:var(--ink-700)}
.article-body h2{position:relative;margin:2.2em 0 .9em;padding-top:.75em;padding-left:18px;border-top:1px solid var(--line);font-size:clamp(22px,3vw,30px);line-height:1.35}
.article-body h2::before{content:"";position:absolute;left:0;top:calc(.75em + 7px);width:3px;height:22px;background:var(--primary)}
.article-body h3{margin:1.8em 0 .6em;font-size:20px;line-height:1.5;color:var(--ink-900)}
.article-body h4{margin:1.6em 0 .5em;font-size:17px;color:var(--ink-900)}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.4em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:.5em 0;line-height:1.9}
.article-body ul li::marker{color:var(--primary)}
.article-body ol li::marker{color:var(--primary);font-variant-numeric:tabular-nums}
.article-body blockquote{margin:1.6em 0;padding:18px 22px;background:var(--paper-2);border-left:2px solid var(--accent);color:var(--ink-700);font-size:16px}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{margin:1.6em auto;border-radius:var(--r-img)}
.article-body a{color:var(--primary);border-bottom:1px solid rgba(193,70,30,.35);transition:border-color .24s var(--ease)}
.article-body a:hover{border-bottom-color:var(--primary)}
.article-body strong{color:var(--ink-900);font-weight:600}
.article-body hr{margin:2.4em 0;border:0;border-top:1px solid var(--line)}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;line-height:1.7}
.article-body th{background:var(--paper-2);color:var(--ink-900);font-weight:600}
.article-body code{padding:2px 6px;background:var(--paper-2);border-radius:2px;font-size:14px}
@media(max-width:640px){
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
}

/* ---------- 文末 ---------- */
.article-foot{max-width:748px;margin:0 auto;padding:8px 0 0}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;padding-top:28px;border-top:1px solid var(--line)}
.back-row{display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;margin-top:36px}
.back-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-700);transition:color .24s var(--ease)}
.back-link:hover{color:var(--primary)}
.back-link .arrow{transition:transform .24s var(--ease)}
.back-link:hover .arrow{transform:translateX(-3px)}
.duo-grid{display:grid;grid-template-columns:1fr;gap:0;margin-top:36px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media(min-width:768px){.duo-grid{grid-template-columns:1fr 1fr}}
.duo-card{display:block;padding:22px 4px;transition:background .24s var(--ease),padding .24s var(--ease)}
.duo-card+.duo-card{border-top:1px solid var(--line)}
@media(min-width:768px){
  .duo-card+.duo-card{border-top:0;border-left:1px solid var(--line);padding-left:24px}
  .duo-card:first-child{padding-right:24px}
  .duo-card:hover{background:var(--paper-2);padding-left:24px;padding-right:24px}
}
.duo-label{font-size:12px;letter-spacing:.12em;color:var(--ink-300)}
.duo-title{margin-top:10px;font-family:var(--font-title);font-size:18px;color:var(--ink-900);line-height:1.5}
.duo-card:hover .duo-title{color:var(--primary)}

/* ---------- 相关推荐 ---------- */
.sec-head{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;margin-bottom:40px}
.sec-head h2{font-size:clamp(24px,3vw,34px);line-height:1.3}
.sec-head p{margin-top:12px;max-width:56ch;font-size:15px;color:var(--ink-500)}
.sec-more{font-size:14px;color:var(--ink-700);border-bottom:1px solid var(--line);padding-bottom:4px;transition:.24s var(--ease)}
.sec-more:hover{color:var(--primary);border-bottom-color:var(--primary)}
.card-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media(min-width:768px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:32px}}
.card{display:flex;flex-direction:column;height:100%;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease)}
.card:hover{transform:translateY(-2px);border-color:var(--ink-900);box-shadow:0 20px 40px -24px rgba(18,16,14,.35)}
.card-media{position:relative;aspect-ratio:3/2;overflow:hidden;background:var(--paper-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .48s ease-out}
.card:hover .card-media img{transform:scale(1.03)}
.card-cat{position:absolute;left:12px;top:12px;padding:4px 10px;border-radius:999px;background:rgba(18,16,14,.9);color:#F7F5F1;font-size:12px;letter-spacing:.06em}
.card-body{display:flex;flex-direction:column;flex:1;gap:10px;padding:20px}
.card-time{font-size:13px;color:var(--ink-300);font-variant-numeric:tabular-nums}
.card-title{font-family:var(--font-title);font-size:19px;line-height:1.5;color:var(--ink-900);transition:color .24s var(--ease)}
.card:hover .card-title{color:var(--primary)}
.card-text{font-size:14px;line-height:1.85;color:var(--ink-500)}
.card-link{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-700)}
.card-link .arrow{transition:transform .24s var(--ease)}
.card:hover .card-link .arrow{transform:translateX(4px);color:var(--primary)}

/* ---------- CTA ---------- */
.cta-block{margin:0;background:var(--ink-900);color:rgba(247,245,241,.78)}
.cta-inner{display:grid;grid-template-columns:1fr;gap:32px;padding:64px 0}
@media(min-width:1024px){.cta-inner{grid-template-columns:7fr 5fr;align-items:center;gap:56px;padding:88px 0}}
.cta-inner h2{color:#F7F5F1;font-size:clamp(26px,3.2vw,40px);line-height:1.3}
.cta-inner p{margin-top:16px;max-width:48ch;font-size:16px;line-height:1.95;color:rgba(247,245,241,.7)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-actions .btn{background:var(--primary);border-color:var(--primary);color:#FBF9F5}
.cta-actions .btn:hover{background:var(--primary-d);border-color:var(--primary-d)}
.cta-actions .btn-line{background:transparent;border-color:rgba(247,245,241,.35);color:#F7F5F1}
.cta-actions .btn-line:hover{background:rgba(247,245,241,.08);border-color:rgba(247,245,241,.6);color:#F7F5F1}
.cta-list{display:flex;flex-direction:column;gap:0;border-top:1px solid rgba(247,245,241,.14)}
.cta-list li{display:flex;align-items:baseline;gap:14px;padding:16px 0;border-bottom:1px solid rgba(247,245,241,.14);font-size:15px;color:rgba(247,245,241,.78)}
.cta-list .idx{font-family:var(--font-title);font-size:15px;color:var(--primary);font-variant-numeric:tabular-nums}

/* ---------- 空态 ---------- */
.empty-state{max-width:748px;margin:0 auto;padding:56px 0;text-align:center}
.empty-state p{margin-top:20px;font-size:16px;color:var(--ink-500)}
.skeleton{display:flex;flex-direction:column;gap:14px;padding:28px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--paper-2)}
.skeleton span{display:block;height:12px;background:#E1DCD1;border-radius:2px}
.skeleton span:nth-child(2){width:78%}
.skeleton span:nth-child(3){width:56%}
.empty-state .btn{margin-top:26px}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(247,245,241,.72)}
.footer-top{padding-top:64px;border-top:1px solid rgba(255,255,255,.12)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}}
.footer-brand{font-family:var(--font-title);font-weight:700;font-size:19px;color:#F7F5F1;letter-spacing:.01em}
.footer-brand small{display:block;margin-top:8px;font-family:var(--font-body);font-weight:400;font-size:12px;letter-spacing:.12em;color:rgba(247,245,241,.5)}
.footer-about{margin-top:18px;max-width:36ch;font-size:14px;line-height:1.9;color:rgba(247,245,241,.6)}
.footer-col h4{margin:0 0 16px;font-family:var(--font-body);font-size:12px;font-weight:500;letter-spacing:.12em;color:rgba(247,245,241,.45)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(247,245,241,.72);transition:color .24s var(--ease)}
.footer-col a:hover{color:#F7F5F1}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-top:48px;padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(247,245,241,.5)}

@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink-900:#12100E;
  --ink-700:#2E2B27;
  --ink-500:#6B665E;
  --ink-300:#A9A399;
  --line:#E3DED4;
  --line-strong:#CFC8BB;
  --paper:#F7F5F1;
  --paper-2:#EFEBE3;
  --white:#FFFFFF;
  --primary:#C1461E;
  --primary-d:#A63A16;
  --accent:#1F5F4F;
  --radius-card:4px;
  --radius-btn:2px;
  --radius-img:3px;
  --shadow-hover:0 20px 40px -24px rgba(18,16,14,.35);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  color:var(--ink-700);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
.tabnum{font-family:var(--mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}
@media (min-width:1280px){.container{padding:0 48px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,241,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .28s var(--ease),background .28s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:76px;transition:height .28s var(--ease)}
.site-header.is-scrolled .header-inner{height:64px}
.brand{display:flex;align-items:baseline;gap:8px;flex-shrink:0}
.brand-mark{font-family:var(--serif);font-weight:700;font-size:19px;letter-spacing:.02em;color:var(--ink-900);line-height:1}
.brand-sub{font-size:12px;letter-spacing:.16em;color:var(--ink-500);line-height:1}
.nav-desktop{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;
  padding:8px 12px;
  font-size:14px;
  letter-spacing:.04em;
  color:var(--ink-700);
  border-radius:999px;
  transition:color .24s var(--ease),background .24s var(--ease);
}
.nav-link:hover{background:var(--paper-2)}
.nav-link.active{color:var(--ink-900)}
.nav-link.active::after{
  content:"";position:absolute;left:50%;bottom:1px;
  transform:translateX(-50%);
  width:18px;height:2px;background:var(--primary);
}
.header-cta{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;letter-spacing:.04em;color:var(--primary);
  padding-bottom:2px;border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),color .24s var(--ease);
  white-space:nowrap;
}
.header-cta:hover{border-bottom-color:var(--primary);color:var(--primary-d)}
.header-cta .arrow{display:inline-block;transition:transform .24s var(--ease)}
.header-cta:hover .arrow{transform:translateX(3px)}
.burger{display:none;width:40px;height:40px;flex-direction:column;justify-content:center;gap:6px;align-items:flex-end}
.burger i{display:block;width:22px;height:1.5px;background:var(--ink-900);transition:transform .28s var(--ease),width .28s var(--ease)}
@media (max-width:1023px){
  .nav-desktop{display:none}
  .header-cta{display:none}
  .burger{display:flex}
}
.mobile-drawer{
  position:fixed;inset:0;z-index:80;
  background:var(--paper);
  transform:translateY(-100%);
  transition:transform .38s var(--ease);
  display:flex;flex-direction:column;
  padding:22px 24px 32px;
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--line)}
.drawer-close{font-size:26px;line-height:1;color:var(--ink-700);padding:4px 8px}
.drawer-nav{display:flex;flex-direction:column;padding-top:14px}
.drawer-link{
  position:relative;
  padding:16px 0 16px 16px;
  font-size:17px;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.drawer-link::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:5px;height:5px;border-radius:50%;background:var(--line-strong)}
.drawer-link.active{color:var(--ink-900)}
.drawer-link.active::before{background:var(--primary);width:4px;height:18px;border-radius:2px}
.drawer-foot{margin-top:auto;padding-top:28px;font-size:13px;color:var(--ink-500);line-height:1.8}

/* ---------- generic ---------- */
.section{padding:72px 0}
@media (min-width:768px){.section{padding:88px 0}}
@media (min-width:1024px){.section{padding:104px 0}}
.section + .section{border-top:1px solid var(--line)}
.section-label{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.16em;color:var(--ink-500);
  margin-bottom:18px;
}
.section-label::before{content:"";width:20px;height:1px;background:var(--primary)}
.section-title{font-family:var(--serif);font-weight:700;font-size:clamp(26px,3.2vw,42px);line-height:1.22;color:var(--ink-900);letter-spacing:-.01em}
.section-lead{margin-top:16px;font-size:16px;color:var(--ink-500);max-width:68ch}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 26px;
  font-size:15px;letter-spacing:.04em;
  border-radius:var(--radius-btn);
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.btn-primary{background:var(--primary);color:#fff;border:1px solid var(--primary)}
.btn-primary:hover{background:var(--primary-d);border-color:var(--primary-d);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink-900);border:1px solid var(--line-strong)}
.btn-ghost:hover{border-color:var(--ink-900);transform:translateY(-1px)}
.btn .arrow{transition:transform .24s var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:56px 0 0}
.hero::before{
  content:"";position:absolute;inset:0 0 auto auto;width:520px;height:520px;
  background-image:linear-gradient(to right,rgba(18,16,14,.06) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(18,16,14,.06) 1px,transparent 1px);
  background-size:12px 12px;
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:center}
.hero-eyebrow{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.tag-pill{
  display:inline-flex;align-items:center;
  padding:5px 12px;
  font-size:12px;letter-spacing:.1em;
  color:var(--ink-700);
  background:var(--paper-2);
  border-radius:999px;
}
.tag-pill.accent{background:rgba(31,95,79,.1);color:var(--accent)}
.hero-title{font-family:var(--serif);font-weight:700;font-size:clamp(32px,4.6vw,56px);line-height:1.16;color:var(--ink-900);letter-spacing:-.01em}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.9;color:var(--ink-500);max-width:34ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-figure{position:relative}
.hero-figure img{width:100%;aspect-ratio:4/5;object-fit:cover;border:1px solid var(--line);border-radius:var(--radius-img)}
.hero-figure figcaption{position:absolute;left:0;bottom:-26px;font-size:12px;color:var(--ink-300);letter-spacing:.06em}
.hero-metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:64px;border-top:1px solid var(--line);
}
.metric{padding:22px 0 4px;border-right:1px solid var(--line);padding-right:18px}
.metric:last-child{border-right:0}
.metric-num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:26px;font-weight:600;color:var(--ink-900);line-height:1.2}
.metric-label{margin-top:6px;font-size:13px;color:var(--ink-500)}
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-figure{max-width:480px}
  .hero-sub{max-width:60ch}
}
@media (max-width:639px){
  .hero{padding-top:36px}
  .hero-metrics{grid-template-columns:repeat(2,1fr);margin-top:44px}
  .metric{padding:16px 14px 14px 0}
  .metric:nth-child(2){border-right:0}
  .metric:nth-child(odd){border-right:1px solid var(--line)}
  .hero-figure figcaption{position:static;margin-top:10px}
}

/* ---------- page head ---------- */
.page-head{padding:36px 0 0}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);letter-spacing:.03em}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--ink-300)}
.page-head-inner{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;padding-bottom:28px;border-bottom:1px solid var(--line)}
.page-head h1{font-family:var(--serif);font-weight:700;font-size:clamp(28px,4vw,46px);line-height:1.2;color:var(--ink-900)}
.page-head .head-note{margin-top:14px;font-size:16px;color:var(--ink-500);max-width:52ch}
.head-count{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--ink-500);letter-spacing:.06em;white-space:nowrap}
.head-count strong{display:block;font-size:34px;font-weight:600;color:var(--ink-900);letter-spacing:0}

/* ---------- entry cards ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}
.entry-card{
  position:relative;
  display:flex;flex-direction:column;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.entry-card:nth-child(3n+2){border-color:var(--line-strong)}
.entry-card:hover{border-color:var(--ink-900);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.entry-media{position:relative;overflow:hidden;aspect-ratio:3/2}
.entry-media img{width:100%;height:100%;object-fit:cover;transition:transform .48s ease-out}
.entry-card:hover .entry-media img{transform:scale(1.03)}
.entry-badge{
  position:absolute;top:12px;left:12px;
  padding:4px 10px;
  font-size:12px;letter-spacing:.06em;
  color:var(--paper);background:var(--ink-900);
  border-radius:999px;
}
.entry-body{display:flex;flex-direction:column;gap:10px;padding:22px 22px 24px}
.entry-meta{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;color:var(--ink-300);letter-spacing:.06em}
.entry-title{font-family:var(--serif);font-size:21px;font-weight:700;line-height:1.35;color:var(--ink-900)}
.entry-text{font-size:15px;color:var(--ink-500);line-height:1.85}
.entry-link{
  margin-top:6px;padding-top:14px;border-top:1px solid var(--line);
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--primary);
}
.entry-link .arrow{transition:transform .24s var(--ease)}
.entry-card:hover .entry-link .arrow{transform:translateX(3px)}
@media (max-width:1023px){
  .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
}
@media (max-width:639px){
  .entry-grid{grid-template-columns:1fr}
  .entry-card:nth-child(3n+2){border-color:var(--line)}
}

/* ---------- split blocks ---------- */
.split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:56px;align-items:start}
.split.reverse{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.sticky-col{position:sticky;top:104px}
.sticky-col figure{margin-top:26px}
.sticky-col img{width:100%;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line);border-radius:var(--radius-img)}
.numbered-list{display:flex;flex-direction:column}
.numbered-item{display:grid;grid-template-columns:64px 1fr;gap:20px;padding:26px 0;border-top:1px solid var(--line)}
.numbered-item:first-child{border-top:0;padding-top:0}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:15px;color:var(--primary);letter-spacing:.08em;padding-top:4px}
.numbered-item h3{font-family:var(--serif);font-size:20px;font-weight:700;color:var(--ink-900);line-height:1.4}
.numbered-item p{margin-top:8px;font-size:15.5px;color:var(--ink-500);line-height:1.85}
@media (max-width:1023px){
  .split,.split.reverse{grid-template-columns:1fr;gap:32px}
  .sticky-col{position:static}
  .sticky-col figure{margin-top:20px}
}

/* ---------- stat band ---------- */
.stat-band{background:var(--ink-900);color:var(--paper);padding:72px 0}
.stat-band .section-label{color:rgba(247,245,241,.6)}
.stat-band .section-label::before{background:var(--primary)}
.stat-band h2{font-family:var(--serif);font-weight:700;font-size:clamp(24px,2.6vw,34px);color:var(--paper);line-height:1.3}
.stat-band p{margin-top:14px;font-size:15.5px;color:rgba(247,245,241,.68);max-width:62ch}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);margin-top:52px;border-top:1px solid rgba(247,245,241,.14)}
.stat-cell{padding:28px 22px 6px 0;border-right:1px solid rgba(247,245,241,.14)}
.stat-cell:last-child{border-right:0}
.stat-num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(34px,4.4vw,56px);font-weight:600;line-height:1.05;color:var(--primary)}
.stat-label{margin-top:12px;font-size:14px;color:rgba(247,245,241,.7)}
@media (max-width:767px){
  .stat-band{padding:56px 0}
  .stat-row{grid-template-columns:repeat(2,1fr);margin-top:36px}
  .stat-cell:nth-child(2n){border-right:0}
  .stat-cell:nth-child(-n+2){border-bottom:1px solid rgba(247,245,241,.14)}
}

/* ---------- steps ---------- */
.steps{display:flex;flex-direction:column;margin-top:44px}
.step{display:grid;grid-template-columns:120px 1fr;gap:28px;padding:26px 0;border-top:1px solid var(--line);position:relative;transition:background .24s var(--ease)}
.step:hover{background:var(--paper-2)}
.step:hover::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary)}
.step-time{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--ink-300);letter-spacing:.08em;padding-top:6px}
.step h3{font-family:var(--serif);font-size:20px;font-weight:700;color:var(--ink-900);line-height:1.4}
.step p{margin-top:8px;font-size:15.5px;color:var(--ink-500);line-height:1.85}
@media (max-width:639px){
  .step{grid-template-columns:1fr;gap:8px}
}

/* ---------- faq ---------- */
.faq-list{margin-top:40px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;gap:14px;
  padding:22px 0;text-align:left;
  font-family:var(--serif);font-size:18px;font-weight:700;line-height:1.5;color:var(--ink-900);
}
.faq-dot{flex-shrink:0;width:8px;height:8px;border-radius:50%;background:var(--ink-300);margin-top:11px;transition:background .24s var(--ease)}
.faq-item.is-open .faq-dot{background:var(--primary)}
.faq-plus{margin-left:auto;flex-shrink:0;position:relative;width:16px;height:16px;margin-top:8px;transition:transform .32s var(--ease)}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--ink-500)}
.faq-plus::before{left:0;top:7px;width:16px;height:1.5px}
.faq-plus::after{left:7px;top:0;width:1.5px;height:16px}
.faq-item.is-open .faq-plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a-inner{padding:0 40px 24px 22px;font-size:16px;line-height:1.9;color:var(--ink-500)}
.faq-item.is-open .faq-a{max-height:420px}

/* ---------- cta + form ---------- */
.cta-band{background:var(--paper-2);border-top:1px solid var(--line)}
.cta-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:56px;align-items:start}
.cta-note{margin-top:18px;font-size:15.5px;color:var(--ink-500);line-height:1.9;max-width:40ch}
.contact-list{margin-top:28px;display:flex;flex-direction:column;gap:12px}
.contact-list li{display:flex;gap:12px;font-size:14.5px;color:var(--ink-500)}
.contact-list li::before{content:"";flex-shrink:0;width:14px;height:1px;background:var(--primary);margin-top:14px}
.field{margin-bottom:26px}
.field label{display:block;font-size:12px;letter-spacing:.12em;font-weight:500;color:var(--ink-500);margin-bottom:6px}
.field input,.field textarea{
  width:100%;padding:10px 0;
  background:transparent;border:0;border-bottom:1px solid var(--line-strong);
  font-size:16px;color:var(--ink-900);
  transition:border-color .24s var(--ease);
  outline:none;
}
.field input:focus,.field textarea:focus{border-bottom-color:var(--primary)}
.field textarea{resize:vertical;min-height:88px;line-height:1.8}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:4px}
.chip{position:relative;display:inline-flex}
.chip input{position:absolute;opacity:0;width:0;height:0}
.chip span{
  display:inline-block;padding:7px 16px;
  font-size:14px;color:var(--ink-500);
  border:1px solid var(--line-strong);border-radius:var(--radius-btn);
  transition:all .24s var(--ease);
}
.chip input:checked + span{background:var(--ink-900);border-color:var(--ink-900);color:var(--paper)}
.chip span:hover{border-color:var(--ink-900);color:var(--ink-900)}
.chip input:focus-visible + span{outline:2px solid var(--primary);outline-offset:2px}
.form-tip{margin-top:16px;font-size:14px;color:var(--primary);opacity:0;transition:opacity .28s var(--ease)}
.form-tip.is-show{opacity:1}
@media (max-width:1023px){.cta-grid{grid-template-columns:1fr;gap:36px}}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(247,245,241,.78);padding:72px 0 32px;margin-top:0}
.footer-top{border-top:1px solid rgba(255,255,255,.12);padding-top:56px}
.footer-grid{display:grid;grid-template-columns:minmax(0,4fr) repeat(3,minmax(0,2fr));gap:40px}
.footer-brand{font-family:var(--serif);font-weight:700;font-size:19px;color:var(--paper);line-height:1.4}
.footer-brand small{display:block;margin-top:8px;font-family:var(--sans);font-weight:400;font-size:12px;letter-spacing:.12em;color:rgba(247,245,241,.5)}
.footer-about{margin-top:18px;font-size:14.5px;line-height:1.9;color:rgba(247,245,241,.6);max-width:38ch}
.footer-col h4{font-size:12px;letter-spacing:.14em;font-weight:500;color:rgba(247,245,241,.5);margin-bottom:18px}
.footer-col li{margin-bottom:12px}
.footer-col a{font-size:14.5px;color:rgba(247,245,241,.78);border-bottom:1px solid transparent;transition:color .24s var(--ease),border-color .24s var(--ease)}
.footer-col a:hover{color:var(--paper);border-bottom-color:var(--primary)}
.footer-bottom{margin-top:56px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(247,245,241,.5)}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:639px){
  .site-footer{padding:56px 0 26px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* roulang page: category2 */
:root{
  --ink-900:#12100E;--ink-700:#2E2B27;--ink-500:#6B665E;--ink-300:#A9A399;
  --line:#E3DED4;--paper:#F7F5F1;--paper-2:#EFEBE3;
  --primary:#C1461E;--primary-d:#A63A16;--accent:#1F5F4F;
  --r-card:4px;--r-btn:2px;--r-img:3px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink-700);font-family:var(--sans);font-size:16.5px;line-height:1.9;font-weight:400;letter-spacing:.005em}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{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(--serif);font-weight:700;color:var(--ink-900);line-height:1.22;letter-spacing:-.01em}
p{margin:0}
::selection{background:var(--primary);color:#fff}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
.tabnum{font-family:var(--mono);font-variant-numeric:tabular-nums}

body .container{width:100%;max-width:1240px;margin-inline:auto;padding-inline:20px}
@media(min-width:768px){body .container{padding-inline:32px}}
@media(min-width:1280px){body .container{padding-inline:48px;max-width:1240px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:70;background:rgba(247,245,241,.9);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .3s var(--ease),background .3s var(--ease)}
.site-header.is-scrolled{border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:76px;transition:height .3s var(--ease)}
.site-header.is-scrolled .header-inner{height:64px}
.brand{display:flex;align-items:baseline;gap:9px;flex-shrink:0}
.brand-mark{font-family:var(--serif);font-size:20px;font-weight:700;letter-spacing:.03em;color:var(--ink-900);line-height:1}
.brand-sub{font-size:11.5px;letter-spacing:.16em;color:var(--ink-500)}
.nav-desktop{display:none;align-items:center;gap:2px}
.nav-link{position:relative;display:inline-block;padding:7px 13px;border-radius:999px;font-size:14px;letter-spacing:.04em;color:var(--ink-700);transition:background .22s var(--ease),color .22s var(--ease)}
.nav-link:hover{background:var(--paper-2);color:var(--ink-900)}
.nav-link.active{color:var(--ink-900);font-weight:500}
.nav-link.active::after{content:"";position:absolute;left:50%;bottom:1px;width:18px;height:2px;background:var(--primary);transform:translateX(-50%)}
.header-cta{display:none;align-items:center;gap:6px;font-size:14px;letter-spacing:.04em;color:var(--ink-900);padding:7px 2px;border-bottom:1px solid var(--line);transition:color .22s var(--ease),border-color .22s var(--ease)}
.header-cta .arrow{display:inline-block;transition:transform .24s var(--ease)}
.header-cta:hover{color:var(--primary);border-color:var(--primary)}
.header-cta:hover .arrow{transform:translateX(3px)}
.burger{display:flex;flex-direction:column;justify-content:center;gap:6px;width:40px;height:40px;padding:0 8px;border:1px solid var(--line);border-radius:var(--r-btn);transition:border-color .22s var(--ease)}
.burger i{display:block;height:1px;background:var(--ink-900);transition:transform .3s var(--ease)}
.burger:hover{border-color:var(--ink-900)}
@media(min-width:1024px){
  .nav-desktop{display:flex}
  .header-cta{display:inline-flex}
  .burger{display:none}
}
.mobile-drawer{position:fixed;inset:76px 0 0;background:var(--paper);z-index:65;transform:translateY(-8px);opacity:0;visibility:hidden;transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;overflow-y:auto;padding:28px 20px 60px;border-top:1px solid var(--line)}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-drawer a{display:block;padding:16px 4px;border-bottom:1px solid var(--line);font-size:17px;font-family:var(--serif);color:var(--ink-900)}
.mobile-drawer a.active{color:var(--primary)}
.mobile-drawer a.active::before{content:"";display:inline-block;width:4px;height:4px;border-radius:50%;background:var(--primary);vertical-align:middle;margin-right:10px}
@media(min-width:1024px){.mobile-drawer{display:none}}

/* ---------- shared ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:11.5px;letter-spacing:.18em;color:var(--ink-500);text-transform:uppercase}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary)}
.section{padding-block:56px;border-top:1px solid var(--line)}
@media(min-width:768px){.section{padding-block:72px}}
@media(min-width:1024px){.section{padding-block:96px}}
.section-head{max-width:760px}
.section-head h2{font-size:clamp(26px,3.2vw,42px);margin-bottom:16px}
.section-head p{color:var(--ink-500);max-width:66ch}
.lead{color:var(--ink-500);max-width:70ch}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:var(--r-btn);font-size:15px;letter-spacing:.04em;border:1px solid transparent;transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease)}
.btn .arrow{transition:transform .24s var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}
.btn-primary{background:var(--ink-900);color:#F7F5F1}
.btn-primary:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-ghost{border-color:var(--line);color:var(--ink-900);background:transparent}
.btn-ghost:hover{border-color:var(--ink-900);background:var(--paper-2);transform:translateY(-2px)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:3px 11px;border-radius:999px;font-size:12px;letter-spacing:.1em;background:var(--ink-900);color:#F2EFE9}
.badge-accent{background:transparent;border:1px solid var(--accent);color:var(--accent)}
.line-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--ink-900);padding-bottom:2px;border-bottom:1px solid var(--line);transition:color .22s var(--ease),border-color .22s var(--ease)}
.line-link:hover{color:var(--primary);border-color:var(--primary)}
[data-reveal]{opacity:1;transform:none}
.js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- hero ---------- */
.cat-hero{position:relative;overflow:hidden;padding-block:44px 48px}
@media(min-width:1024px){.cat-hero{padding-block:72px 88px}}
.cat-hero::after{content:"";position:absolute;top:0;right:0;width:44%;height:78%;pointer-events:none;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:36px 36px;opacity:.5;mask-image:radial-gradient(circle at 85% 15%,#000,transparent 70%);-webkit-mask-image:radial-gradient(circle at 85% 15%,#000,transparent 70%)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-300);margin-bottom:24px}
.crumb a{color:var(--ink-500);transition:color .22s var(--ease)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:var(--line)}
.hero-grid{display:grid;gap:40px;align-items:start;position:relative;z-index:2}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:56px}}
.cat-hero h1{font-size:clamp(34px,5.4vw,64px);margin:18px 0 20px}
.cat-hero .sub{font-size:17px;color:var(--ink-500);max-width:36ch;line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-visual{position:relative}
.hero-visual .frame{border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;aspect-ratio:4/5;background:var(--paper-2)}
.hero-visual .frame img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease-out}
.hero-visual:hover .frame img{transform:scale(1.03)}
.hero-visual .caption{margin-top:12px;font-size:12.5px;color:var(--ink-300)}
.trust-bar{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:40px;padding-top:26px;border-top:1px solid var(--line)}
@media(min-width:768px){.trust-bar{grid-template-columns:repeat(4,1fr)}}
.trust-item .num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:26px;color:var(--ink-900);line-height:1.2}
.trust-item .lbl{font-size:12.5px;letter-spacing:.08em;color:var(--ink-300);margin-top:4px}

/* ---------- timeline ---------- */
.timeline{margin-top:44px;border-top:1px solid var(--line)}
.tl-item{position:relative;display:grid;gap:10px;padding:26px 0 26px 18px;border-bottom:1px solid var(--line);transition:background .24s var(--ease)}
.tl-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary);transform:scaleY(0);transform-origin:top;transition:transform .3s var(--ease)}
.tl-item:hover{background:var(--paper-2)}
.tl-item:hover::before{transform:scaleY(1)}
@media(min-width:768px){
  .tl-item{grid-template-columns:190px 1fr;gap:36px;padding-left:22px}
}
.tl-time{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--ink-300);font-size:14px;letter-spacing:.08em}
.tl-time .tl-num{display:block;font-size:22px;color:var(--ink-900);letter-spacing:.02em}
.tl-time .tl-tag{display:block;margin-top:4px;font-family:var(--sans);font-size:12.5px;letter-spacing:.1em;color:var(--ink-500)}
.tl-body h3{font-size:20px;margin-bottom:10px}
.tl-body p{color:var(--ink-500);max-width:62ch}
.tl-link{margin-top:14px;display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--ink-900);border-bottom:1px solid var(--line);padding-bottom:2px;transition:color .22s var(--ease),border-color .22s var(--ease)}
.tl-link:hover{color:var(--primary);border-color:var(--primary)}

/* ---------- mechanism cards ---------- */
.mech-grid{display:grid;gap:28px;margin-top:44px}
@media(min-width:768px){.mech-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(min-width:1024px){.mech-grid{grid-template-columns:1fr 1fr 1fr}}
.mech-card{border:1px solid var(--line);border-radius:var(--r-card);background:#fff;overflow:hidden;transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease)}
.mech-card:hover{transform:translateY(-2px);border-color:var(--ink-900);box-shadow:0 20px 40px -24px rgba(18,16,14,.35)}
.mech-card .thumb{aspect-ratio:3/2;overflow:hidden;background:var(--paper-2)}
.mech-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease-out}
.mech-card:hover .thumb img{transform:scale(1.03)}
.mech-card .body{padding:22px 22px 26px}
.mech-card h3{font-size:20px;margin:14px 0 10px}
.mech-card p{color:var(--ink-500);font-size:15.5px}
.mech-card .line-link{margin-top:18px}
@media(min-width:768px) and (max-width:1023px){.mech-card:nth-child(even){margin-top:0}}
@media(min-width:1024px){.mech-card:nth-child(2){margin-top:44px}}

/* ---------- dark stats ---------- */
.stats{background:var(--ink-900);color:#EDE9E1;border-top:1px solid var(--ink-900)}
.stats .section{padding-block:56px;border-top:0}
@media(min-width:1024px){.stats .section{padding-block:88px}}
.stats h2{color:#F7F5F1;font-size:clamp(24px,2.6vw,34px);margin-bottom:12px}
.stats .lead{color:rgba(247,245,241,.62)}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px 24px;margin-top:44px}
@media(min-width:1024px){.stat-grid{grid-template-columns:repeat(4,1fr);gap:0}}
@media(min-width:1024px){.stat-cell{padding-inline:28px;border-left:1px solid rgba(247,245,241,.14)}.stat-cell:first-child{border-left:0;padding-left:0}}
.stat-cell .num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(40px,5vw,64px);line-height:1;color:var(--primary);letter-spacing:-.02em}
.stat-cell .lbl{margin-top:12px;font-size:13px;letter-spacing:.1em;color:rgba(247,245,241,.6)}
.stat-note{margin-top:44px;padding-top:24px;border-top:1px solid rgba(247,245,241,.12);font-size:13.5px;color:rgba(247,245,241,.5)}

/* ---------- risk split ---------- */
.split{display:grid;gap:40px;align-items:start}
@media(min-width:1024px){.split{grid-template-columns:5fr 7fr;gap:64px}}
.split-figure{border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;aspect-ratio:4/3;background:var(--paper-2)}
.split-figure img{width:100%;height:100%;object-fit:cover}
.risk-list{margin-top:8px}
.risk-list li{display:grid;grid-template-columns:44px 1fr;gap:16px;padding:22px 0;border-bottom:1px solid var(--line)}
.risk-list li:first-child{padding-top:0}
.risk-list .idx{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--primary);letter-spacing:.08em;padding-top:5px}
.risk-list h3{font-size:19px;margin-bottom:8px}
.risk-list p{color:var(--ink-500);font-size:15.5px;max-width:58ch}

/* ---------- faq ---------- */
.faq{margin-top:36px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;width:100%;text-align:left;padding:22px 0;font-family:var(--serif);font-size:18px;font-weight:600;color:var(--ink-900);line-height:1.5;transition:color .22s var(--ease)}
@media(min-width:768px){.faq-q{font-size:20px}}
.faq-q::before{content:"";flex:0 0 auto;width:8px;height:8px;border-radius:50%;background:var(--ink-300);margin-top:9px;margin-right:6px;transition:background .24s var(--ease)}
.faq-item.is-open .faq-q::before{background:var(--primary)}
.faq-q:hover{color:var(--primary)}
.faq-q .plus{flex:0 0 auto;position:relative;width:16px;height:16px;margin-top:6px}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;background:var(--ink-500);transition:transform .32s var(--ease),background .24s var(--ease)}
.faq-q .plus::before{left:0;top:7.5px;width:16px;height:1px}
.faq-q .plus::after{top:0;left:7.5px;height:16px;width:1px}
.faq-item.is-open .faq-q .plus::after{transform:rotate(90deg);opacity:0}
.faq-item.is-open .faq-q .plus::before{background:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s var(--ease)}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a .inner{padding:0 34px 26px 28px;color:var(--ink-500);font-size:16px}

/* ---------- cta + form ---------- */
.cta-wrap{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-grid{display:grid;gap:36px;padding-block:56px}
@media(min-width:1024px){.cta-grid{grid-template-columns:5fr 7fr;gap:64px;padding-block:88px}}
.form-grid{display:grid;gap:26px}
@media(min-width:768px){.form-grid{grid-template-columns:1fr 1fr}}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:12px;letter-spacing:.12em;color:var(--ink-500);font-weight:500}
.field input,.field textarea{background:transparent;border:0;border-bottom:1px solid var(--line);padding:9px 0;font-size:15.5px;color:var(--ink-900);transition:border-color .24s var(--ease);border-radius:0}
.field textarea{resize:vertical;min-height:96px;line-height:1.8}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-300)}
.field input:focus,.field textarea:focus{outline:none;border-bottom-color:var(--primary)}
.pill-row{display:flex;flex-wrap:wrap;gap:10px}
.pill{position:relative;display:inline-flex;align-items:center;gap:7px;padding:8px 16px;border:1px solid var(--line);border-radius:999px;font-size:13.5px;color:var(--ink-700);cursor:pointer;transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease)}
.pill input{position:absolute;opacity:0;pointer-events:none}
.pill:hover{border-color:var(--ink-900)}
.pill:has(input:checked){background:var(--ink-900);color:#F7F5F1;border-color:var(--ink-900)}
.form-note{font-size:12.5px;color:var(--ink-300);margin-top:4px}
.form-actions{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:center;gap:16px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:#EDE9E1;margin-top:0}
.footer-top{padding-block:52px 28px}
.footer-grid{display:grid;gap:36px;padding-top:36px;border-top:1px solid rgba(247,245,241,.12)}
@media(min-width:768px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:48px}}
.footer-brand{font-family:var(--serif);font-size:20px;font-weight:700;color:#F7F5F1;line-height:1.4}
.footer-brand small{display:block;font-family:var(--sans);font-size:11.5px;letter-spacing:.16em;font-weight:400;color:rgba(247,245,241,.45);margin-top:8px}
.footer-about{margin-top:16px;font-size:14px;color:rgba(247,245,241,.55);max-width:40ch;line-height:1.85}
.footer-col h4{font-family:var(--sans);font-size:12px;letter-spacing:.16em;font-weight:500;color:rgba(247,245,241,.45);margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14.5px;color:rgba(247,245,241,.78);transition:color .22s var(--ease)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;margin-top:40px;padding-top:22px;border-top:1px solid rgba(247,245,241,.12);font-size:13px;color:rgba(247,245,241,.45)}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
  .js [data-reveal]{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --ink-900:#12100E;--ink-700:#2E2B27;--ink-500:#6B665E;--ink-300:#A9A399;
  --line:#E3DED4;--paper:#F7F5F1;--paper-2:#EFEBE3;
  --primary:#C1461E;--primary-d:#A63A16;--accent:#1F5F4F;
  --serif:"Noto Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  --radius-card:4px;--radius-btn:2px;
  --shadow-hover:0 20px 40px -24px rgba(18,16,14,.35);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink-700);
  font-family:var(--sans);font-size:16.5px;line-height:1.9;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink-900);line-height:1.22;letter-spacing:-.01em;margin:0}
p{margin:0 0 1.2em}
ul,ol{margin:0;padding:0;list-style:none}
.tabnum{font-family:var(--mono);font-variant-numeric:tabular-nums}

.container{max-width:1240px !important;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:768px){.container{padding-left:32px;padding-right:32px}}
@media(min-width:1280px){.container{padding-left:48px;padding-right:48px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,241,.94);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),background .24s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:76px;transition:height .24s var(--ease)}
.site-header.is-scrolled .header-inner{height:64px}
.brand{display:flex;align-items:baseline;gap:9px;flex:none}
.brand-mark{font-family:var(--serif);font-weight:700;font-size:19px;letter-spacing:.07em;color:var(--ink-900)}
.brand-sub{font-size:12px;letter-spacing:.14em;color:var(--ink-500)}
.nav-desktop{display:none;align-items:center;gap:2px}
@media(min-width:1024px){.nav-desktop{display:flex}}
.nav-link{
  position:relative;display:inline-block;font-size:13px;letter-spacing:.04em;
  color:var(--ink-700);padding:8px 10px;border-radius:999px;
  transition:background .24s var(--ease),color .24s var(--ease);
  white-space:nowrap;
}
.nav-link:hover{background:var(--paper-2);color:var(--ink-900)}
.nav-link.active{color:var(--ink-900);font-weight:500}
.nav-link.active::after{
  content:"";position:absolute;left:50%;bottom:-1px;width:18px;height:2px;
  background:var(--primary);transform:translateX(-50%);
}
.header-cta{
  display:none;align-items:center;gap:6px;font-size:14px;letter-spacing:.04em;
  color:var(--ink-900);white-space:nowrap;
}
.header-cta .arrow{transition:transform .24s var(--ease);color:var(--primary)}
.header-cta:hover .arrow{transform:translateX(3px)}
.burger{
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  width:40px;height:40px;background:transparent;border:1px solid var(--line);
  border-radius:var(--radius-btn);cursor:pointer;flex:none;
  transition:border-color .24s var(--ease);
}
.burger:hover{border-color:var(--ink-900)}
.burger i{display:block;width:16px;height:1.5px;background:var(--ink-900);transition:transform .3s var(--ease)}
.burger[aria-expanded="true"] i:first-child{transform:translateY(3.75px) rotate(45deg)}
.burger[aria-expanded="true"] i:last-child{transform:translateY(-3.75px) rotate(-45deg)}
@media(min-width:1280px){
  .nav-link{font-size:14px;padding:8px 12px}
  .header-cta{display:inline-flex}
}
@media(min-width:1024px){.burger{display:none}}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;left:0;right:0;top:76px;bottom:0;z-index:55;
  background:var(--paper);padding:25px 20px 40px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;
  border-top:1px solid var(--line);
}
.mobile-drawer.open{opacity:1;visibility:visible;transform:none}
.mobile-drawer a{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 4px;border-bottom:1px solid var(--line);
  font-size:16px;color:var(--ink-700);
}
.mobile-drawer a.current{color:var(--ink-900);font-weight:500}
.mobile-drawer a.current::before{
  content:"";width:4px;height:4px;border-radius:50%;background:var(--primary);margin-right:10px;
}
.mobile-drawer .drawer-cta{
  display:inline-flex;justify-content:center;margin-top:24px;padding:13px 22px;
  background:var(--primary);color:#fff;border-radius:var(--radius-btn);border-bottom:0;
}

/* ---------- hero ---------- */
.cat-hero{position:relative;padding:68px 0 52px;border-bottom:1px solid var(--line);overflow:hidden}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center right;opacity:.22;
}
.cat-hero::after{content:"";position:absolute;inset:0;background:rgba(247,245,241,.74)}
.cat-hero .container{position:relative;z-index:1}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;
  color:var(--primary);text-transform:uppercase;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary)}
.cat-hero h1{
  font-size:clamp(34px,5.4vw,60px);letter-spacing:-.02em;margin-bottom:18px;max-width:22ch;
}
.cat-hero .lede{font-size:17px;color:var(--ink-500);max-width:46ch;margin-bottom:32px}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:0;border-top:1px solid var(--line);padding-top:22px;
}
.metric{padding-right:28px;margin-right:28px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0;margin-right:0;padding-right:0}
.metric b{
  display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:26px;font-weight:600;color:var(--accent);line-height:1.2;
}
.metric span{font-size:13px;color:var(--ink-500);letter-spacing:.04em}
@media(max-width:640px){
  .metric{padding-right:18px;margin-right:18px}
  .metric b{font-size:22px}
}

/* ---------- layout ---------- */
.cat-body{padding:64px 0 80px}
@media(min-width:768px){.cat-body{padding:80px 0 96px}}
.toc-inner{position:sticky;top:100px}
.toc-title{font-size:12px;letter-spacing:.16em;color:var(--ink-300);margin-bottom:14px}
.toc-list{border-left:1px solid var(--line)}
.toc-link{
  display:block;padding:10px 0 10px 16px;margin-left:-1px;
  border-left:2px solid transparent;font-size:14.5px;color:var(--ink-500);
  transition:color .24s var(--ease),border-color .24s var(--ease);
}
.toc-link:hover{color:var(--ink-900)}
.toc-link.active{color:var(--ink-900);font-weight:500;border-left-color:var(--primary)}
.toc-note{
  margin-top:28px;padding:18px;background:var(--paper-2);border-radius:var(--radius-card);
  font-size:13.5px;color:var(--ink-500);line-height:1.8;
}
.toc-note a{color:var(--primary);border-bottom:1px solid rgba(193,70,30,.35)}
@media(max-width:1023px){
  .toc-inner{position:static;margin-bottom:36px}
  .toc-list{display:flex;gap:8px;overflow-x:auto;border-left:0;padding-bottom:6px}
  .toc-link{
    margin-left:0;border-left:0;border-bottom:0;background:var(--paper-2);
    border-radius:999px;padding:8px 14px;white-space:nowrap;font-size:13.5px;
  }
  .toc-link.active{background:var(--ink-900);color:var(--paper);border-left-color:transparent}
  .toc-note{display:none}
}

/* ---------- doc blocks ---------- */
.doc-block{padding-bottom:72px;margin-bottom:72px;border-bottom:1px solid var(--line)}
.doc-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.doc-block h2{
  position:relative;font-size:clamp(26px,3.2vw,38px);padding-left:18px;margin-bottom:20px;
}
.doc-block h2::before{
  content:"";position:absolute;left:0;top:.26em;width:3px;height:1em;background:var(--primary);
}
.doc-block h3{font-size:20px;margin:34px 0 12px}
.doc-block p{color:var(--ink-700);max-width:72ch}
.doc-block p.muted{color:var(--ink-500)}
.doc-block p:last-child{margin-bottom:0}

.device-grid{display:grid;grid-template-columns:1fr;gap:16px;margin:26px 0 8px}
@media(min-width:640px){.device-grid{grid-template-columns:repeat(2,1fr);gap:20px}}
.device-card{
  border:1px solid var(--line);border-radius:var(--radius-card);padding:22px 22px 20px;
  background:#fff;transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.device-card:hover{border-color:var(--ink-900);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.device-card h3{margin:0 0 8px;font-size:18px}
.device-card p{font-size:14.5px;color:var(--ink-500);margin:0}
.device-tag{
  display:inline-block;font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;
  color:var(--accent);border:1px solid var(--line);border-radius:999px;
  padding:2px 10px;margin-bottom:12px;
}

.steps{margin:26px 0 8px;border-top:1px solid var(--line)}
.step{display:flex;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}
.step-num{
  font-family:var(--mono);font-variant-numeric:tabular-nums;flex:none;
  font-size:14px;color:var(--primary);letter-spacing:.08em;padding-top:4px;min-width:28px;
}
.step-body h3{margin:0 0 6px;font-size:17px}
.step-body p{margin:0;font-size:14.5px;color:var(--ink-500)}
.step:hover h3{color:var(--primary)}
.step-body h3{transition:color .24s var(--ease)}

.callout{
  margin:26px 0;padding:20px 22px;background:var(--paper-2);
  border-left:2px solid var(--accent);border-radius:0 var(--radius-card) var(--radius-card) 0;
}
.callout strong{display:block;font-family:var(--serif);font-size:16px;color:var(--ink-900);margin-bottom:6px}
.callout p{margin:0;font-size:14.5px;color:var(--ink-500)}

.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-card);margin:24px 0 8px}
.spec-table{width:100%;border-collapse:collapse;min-width:520px}
.spec-table th,.spec-table td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
.spec-table thead th{
  background:var(--paper-2);font-size:12.5px;letter-spacing:.1em;font-weight:500;
  color:var(--ink-700);
}
.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table td{font-size:15px;color:var(--ink-700)}
.spec-table td:first-child{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--ink-900);white-space:nowrap}
.spec-table tbody tr{transition:background .2s var(--ease)}
.spec-table tbody tr:hover{background:#fff}

.figure{margin:28px 0 8px}
.figure img{width:100%;border-radius:3px;border:1px solid var(--line)}
.figure figcaption{margin-top:10px;font-size:13px;color:var(--ink-300);text-align:center}

.note-list{margin:22px 0 8px;border-top:1px solid var(--line)}
.note-list li{
  display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line);
  font-size:15px;color:var(--ink-700);
}
.note-list li::before{
  content:"";flex:none;width:6px;height:6px;background:var(--primary);
  margin-top:.72em;border-radius:1px;
}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);margin-top:26px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:22px 0;background:none;border:0;cursor:pointer;text-align:left;
  font-family:var(--serif);font-size:18px;color:var(--ink-900);line-height:1.5;
  transition:color .24s var(--ease);
}
.faq-q:hover{color:var(--primary)}
.faq-q-text{display:flex;gap:14px;align-items:flex-start}
.faq-q-text .dot{
  flex:none;width:8px;height:8px;border-radius:50%;background:var(--ink-300);
  margin-top:.6em;transition:background .24s var(--ease);
}
.faq-item.open .dot{background:var(--primary)}
.faq-plus{
  flex:none;font-size:20px;line-height:1;color:var(--ink-300);
  transition:transform .32s var(--ease),color .24s var(--ease);margin-top:2px;
}
.faq-item.open .faq-plus{transform:rotate(45deg);color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s var(--ease)}
.faq-a-inner{padding:0 0 24px 28px;font-size:15.5px;color:var(--ink-500);max-width:70ch}
.faq-a-inner p{margin:0 0 .8em;color:var(--ink-500)}
.faq-a-inner p:last-child{margin-bottom:0}

/* ---------- cta band ---------- */
.cta-band{background:var(--ink-900);color:var(--paper);border-radius:var(--radius-card);padding:44px 26px}
@media(min-width:768px){.cta-band{padding:56px 48px}}
.cta-band h2{color:#fff;font-size:clamp(26px,3.2vw,38px);margin-bottom:16px}
.cta-band p{color:rgba(247,245,241,.72);max-width:56ch;font-size:15.5px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.btn-primary,.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;border-radius:var(--radius-btn);
  font-size:15px;letter-spacing:.04em;padding:13px 26px;
  transition:background .24s var(--ease),transform .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease);
}
.btn-primary{background:var(--primary);color:#fff;border:1px solid var(--primary)}
.btn-primary:hover{background:var(--primary-d);border-color:var(--primary-d);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(247,245,241,.32)}
.btn-ghost:hover{border-color:#fff;transform:translateY(-2px)}
.btn-primary:focus-visible,.btn-ghost:focus-visible,.nav-link:focus-visible,.toc-link:focus-visible,.faq-q:focus-visible{
  outline:2px solid var(--primary);outline-offset:3px;
}
.cta-meta{
  margin-top:26px;padding-top:20px;border-top:1px solid rgba(247,245,241,.14);
  display:flex;flex-wrap:wrap;gap:24px;font-size:13.5px;color:rgba(247,245,241,.6);
}
.cta-meta a{color:#fff;border-bottom:1px solid rgba(247,245,241,.35)}

/* ---------- more links ---------- */
.more-links{margin-top:72px;border-top:1px solid var(--line);padding-top:32px}
.more-links h3{font-size:14px;letter-spacing:.12em;color:var(--ink-300);font-weight:500;margin-bottom:18px;font-family:var(--sans)}
.more-grid{display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:768px){.more-grid{grid-template-columns:repeat(3,1fr)}}
.more-item{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  border:1px solid var(--line);border-radius:var(--radius-card);
  padding:18px 20px;font-size:15px;color:var(--ink-900);background:#fff;
  transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.more-item:hover{border-color:var(--ink-900);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.more-item .arrow{color:var(--primary);transition:transform .24s var(--ease)}
.more-item:hover .arrow{transform:translateX(3px)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(247,245,241,.78);margin-top:96px}
.footer-top{padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}}
.footer-brand{
  font-family:var(--serif);font-size:19px;color:#fff;letter-spacing:.04em;line-height:1.4;
}
.footer-brand small{display:block;font-family:var(--sans);font-size:12px;letter-spacing:.14em;color:rgba(247,245,241,.5);margin-top:8px}
.footer-about{margin-top:18px;font-size:14px;color:rgba(247,245,241,.6);max-width:38ch}
.footer-col h4{
  font-family:var(--sans);font-size:12px;letter-spacing:.14em;font-weight:500;
  color:rgba(247,245,241,.48);margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:rgba(247,245,241,.8);transition:color .2s var(--ease)}
.footer-col ul li a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(247,245,241,.12);padding:22px 0 34px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(247,245,241,.5);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .reveal{opacity:1 !important;transform:none !important}
}

/* roulang page: category4 */
:root{
  --ink-900:#12100E;
  --ink-700:#2E2B27;
  --ink-500:#6B665E;
  --ink-300:#A9A399;
  --line:#E3DED4;
  --paper:#F7F5F1;
  --paper-2:#EFEBE3;
  --primary:#C1461E;
  --primary-d:#A63A16;
  --accent:#1F5F4F;
  --r-card:4px;
  --r-btn:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{
  margin:0;
  font-family:"Noto Serif SC","Songti SC","SimSun",serif;
  font-weight:700;
  color:var(--ink-900);
  line-height:1.22;
  letter-spacing:-.005em;
}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.tabnum{font-variant-numeric:tabular-nums;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
@media(min-width:1024px){.container{padding:0 32px;}}
@media(min-width:1280px){.container{padding:0 48px;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);}
.btn-primary:hover{background:var(--primary-d);border-color:var(--primary-d);transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--ink-900);transform:translateY(-2px);}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,245,241,.88);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .28s var(--ease),background-color .28s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px;}
@media(max-width:1023px){.header-inner{height:64px;}}
.brand{display:flex;align-items:baseline;gap:8px;flex-shrink:0;}
.brand-mark{font-family:"Noto Serif SC","Songti SC",serif;font-weight:700;font-size:19px;letter-spacing:.06em;color:var(--ink-900);}
.brand-sub{font-size:12px;letter-spacing:.16em;color:var(--ink-500);}
.nav-desktop{display:none;align-items:center;gap:4px;}
@media(min-width:1024px){.nav-desktop{display:flex;}}
.nav-link{
  position:relative;font-size:14px;letter-spacing:.04em;color:var(--ink-700);
  padding:6px 12px;border-radius:999px;
  transition:background-color .24s var(--ease),color .24s var(--ease);
  white-space:nowrap;
}
.nav-link:hover{background:var(--paper-2);color:var(--ink-900);}
.nav-link.active{color:var(--ink-900);font-weight:500;}
.nav-link.active::after{
  content:"";position:absolute;left:50%;bottom:-6px;transform:translateX(-50%);
  width:18px;height:2px;background:var(--primary);
}
.header-cta{
  display:none;align-items:center;gap:6px;font-size:14px;color:var(--ink-900);
  letter-spacing:.04em;border-bottom:1px solid var(--line);padding-bottom:2px;
  transition:border-color .24s var(--ease),color .24s var(--ease);
}
.header-cta .arrow{transition:transform .24s var(--ease);}
.header-cta:hover{border-color:var(--primary);color:var(--primary);}
.header-cta:hover .arrow{transform:translateX(3px);}
@media(min-width:1024px){.header-cta{display:inline-flex;}}
.burger{
  display:inline-flex;flex-direction:column;justify-content:center;gap:6px;
  width:40px;height:40px;padding:0 6px;background:none;border:none;cursor:pointer;
}
.burger i{display:block;height:1.5px;background:var(--ink-900);transition:transform .3s var(--ease),opacity .3s var(--ease);}
.burger.is-open i:nth-child(1){transform:translateY(3.75px) rotate(45deg);}
.burger.is-open i:nth-child(2){transform:translateY(-3.75px) rotate(-45deg);}
@media(min-width:1024px){.burger{display:none;}}

/* ---------- 移动抽屉 ---------- */
.mobile-drawer{
  position:fixed;inset:64px 0 0 0;z-index:70;background:var(--paper);
  border-top:1px solid var(--line);
  transform:translateY(-8px);opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;
  overflow-y:auto;
}
.mobile-drawer.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0);}
.drawer-nav{display:flex;flex-direction:column;padding:16px 20px 48px;}
.drawer-link{
  position:relative;padding:16px 0;font-size:17px;color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.drawer-link.active{color:var(--ink-900);font-weight:500;padding-left:16px;}
.drawer-link.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:16px;background:var(--primary);
}
.drawer-cta{margin-top:28px;font-size:15px;color:var(--primary);letter-spacing:.04em;}
@media(min-width:1024px){.mobile-drawer{display:none;}}

/* ---------- 页头 ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:36px 0 64px;}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.16;filter:grayscale(1);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(247,245,241,.74),rgba(247,245,241,.97));
}
.page-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-300);letter-spacing:.03em;}
.crumbs a:hover{color:var(--primary);}
.crumbs .sep{color:var(--line);}
.hero-grid{display:grid;grid-template-columns:1fr;gap:40px;margin-top:36px;align-items:end;}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:48px;}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;color:var(--accent);font-weight:500;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:999px;background:var(--accent);}
.page-hero h1{
  margin-top:18px;font-size:clamp(32px,5vw,60px);letter-spacing:-.01em;
}
.hero-lead{margin-top:20px;max-width:38ch;color:var(--ink-500);font-size:16px;line-height:1.95;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-side{position:relative;}
.hero-side .frame{
  position:relative;border:1px solid var(--line);border-radius:3px;overflow:hidden;
  aspect-ratio:4/5;background:var(--paper-2);
}
.hero-side .frame img{width:100%;height:100%;object-fit:cover;transition:transform .48s ease-out;}
.hero-side .frame:hover img{transform:scale(1.03);}
.stat-strip{
  display:grid;grid-template-columns:repeat(2,1fr);gap:0;margin-top:0;
  border:1px solid var(--line);border-top:none;background:var(--paper);
}
@media(min-width:640px){.stat-strip{grid-template-columns:repeat(4,1fr);}}
.stat-item{padding:18px 16px;border-right:1px solid var(--line);}
.stat-item:last-child{border-right:none;}
@media(max-width:639px){
  .stat-item:nth-child(2n){border-right:none;}
  .stat-item:nth-child(-n+2){border-bottom:1px solid var(--line);}
}
.stat-num{font-size:26px;font-family:"Noto Serif SC",serif;font-weight:700;color:var(--ink-900);line-height:1.1;}
.stat-num.accent{color:var(--primary);}
.stat-label{margin-top:6px;font-size:12px;letter-spacing:.08em;color:var(--ink-500);}

/* ---------- 筛选条 ---------- */
.filter-bar{border-bottom:1px solid var(--line);background:var(--paper);}
.chip-scroll{display:flex;gap:10px;align-items:center;overflow-x:auto;padding:18px 20px;scrollbar-width:none;}
.chip-scroll::-webkit-scrollbar{display:none;}
@media(min-width:1024px){.chip-scroll{padding:18px 32px;}}
@media(min-width:1280px){.chip-scroll{padding:18px 48px;}}
.chip{
  flex:0 0 auto;padding:7px 16px;border:1px solid var(--line);border-radius:999px;
  font-size:13px;letter-spacing:.04em;color:var(--ink-500);background:transparent;cursor:default;
  transition:border-color .24s var(--ease),color .24s var(--ease),background-color .24s var(--ease);
}
.chip:hover{border-color:var(--ink-900);color:var(--ink-900);}
.chip.is-on{background:var(--ink-900);border-color:var(--ink-900);color:var(--paper);}

/* ---------- 图文交错 ---------- */
.report-section{padding:8px 0 0;}
.report-block{
  display:grid;grid-template-columns:1fr;gap:28px;align-items:center;
  padding:56px 0;border-bottom:1px solid var(--line);
}
@media(min-width:1024px){
  .report-block{grid-template-columns:repeat(12,1fr);gap:32px;padding:88px 0;}
  .report-media{grid-column:1 / span 6;}
  .report-body{grid-column:8 / span 5;}
  .report-block.flip .report-media{grid-column:7 / span 6;grid-row:1;}
  .report-block.flip .report-body{grid-column:1 / span 5;grid-row:1;}
}
.report-media{position:relative;border:1px solid var(--line);border-radius:3px;overflow:hidden;background:var(--paper-2);}
.report-media img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .48s ease-out;}
.report-media:hover img{transform:scale(1.03);}
.report-index{
  font-family:"Noto Serif SC",serif;font-weight:700;letter-spacing:.02em;
  font-size:clamp(40px,6vw,72px);line-height:1;color:var(--ink-300);
  font-variant-numeric:tabular-nums;
}
.report-body h2{margin-top:14px;font-size:clamp(22px,2.6vw,32px);}
.report-body p{margin-top:18px;color:var(--ink-500);font-size:16px;line-height:1.95;max-width:38ch;}
.report-list{margin-top:22px;border-top:1px solid var(--line);}
.report-list li{
  display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);
  font-size:14.5px;color:var(--ink-700);
}
.report-list li::before{
  content:"";flex:0 0 auto;width:5px;height:5px;margin-top:11px;background:var(--primary);
}
.link-more{
  display:inline-flex;align-items:center;gap:6px;margin-top:24px;
  font-size:14px;color:var(--ink-900);border-bottom:1px solid var(--line);padding-bottom:3px;
  transition:border-color .24s var(--ease),color .24s var(--ease);
}
.link-more span{transition:transform .24s var(--ease);}
.link-more:hover{border-color:var(--primary);color:var(--primary);}
.link-more:hover span{transform:translateX(3px);}

/* ---------- 自查流程 ---------- */
.selfcheck{background:var(--paper-2);border-bottom:1px solid var(--line);padding:64px 0;}
@media(min-width:1024px){.selfcheck{padding:104px 0;}}
.selfcheck-grid{display:grid;grid-template-columns:1fr;gap:40px;}
@media(min-width:1024px){.selfcheck-grid{grid-template-columns:5fr 7fr;gap:64px;align-items:start;}}
.selfcheck-title h2{font-size:clamp(26px,3.2vw,42px);}
.selfcheck-title p{margin-top:18px;color:var(--ink-500);max-width:32ch;}
.steps{border-top:1px solid var(--line);}
.step{display:grid;grid-template-columns:auto 1fr;gap:20px;padding:24px 0;border-bottom:1px solid var(--line);}
.step-no{
  font-family:"Noto Serif SC",serif;font-weight:700;font-size:22px;color:var(--primary);
  font-variant-numeric:tabular-nums;line-height:1.4;
}
.step h3{font-size:19px;}
.step p{margin-top:10px;color:var(--ink-500);font-size:15px;}

/* ---------- FAQ ---------- */
.faq{padding:64px 0;}
@media(min-width:1024px){.faq{padding:104px 0;}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;}
.section-head h2{font-size:clamp(26px,3.2vw,42px);}
.section-head .desc{margin-top:14px;color:var(--ink-500);max-width:44ch;font-size:15.5px;}
.faq-list{margin-top:48px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:flex-start;gap:14px;text-align:left;
  padding:22px 0;background:none;border:none;cursor:pointer;
  font-family:"Noto Serif SC","Songti SC",serif;font-weight:700;
  font-size:18px;color:var(--ink-900);line-height:1.6;
}
.faq-dot{flex:0 0 auto;width:8px;height:8px;margin-top:12px;border-radius:999px;background:var(--ink-300);transition:background-color .28s var(--ease);}
.faq-item.is-open .faq-dot{background:var(--primary);}
.faq-q .plus{
  margin-left:auto;flex:0 0 auto;position:relative;width:16px;height:16px;margin-top:8px;
  transition:transform .32s var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;background:var(--ink-500);
}
.faq-q .plus::before{left:0;top:7.5px;width:16px;height:1px;}
.faq-q .plus::after{left:7.5px;top:0;width:1px;height:16px;}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg);}
.faq-item.is-open .faq-q .plus::before,.faq-item.is-open .faq-q .plus::after{background:var(--primary);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .32s var(--ease);
}
.faq-a-inner{padding:0 28px 24px 28px;color:var(--ink-500);font-size:16px;line-height:1.9;}

/* ---------- CTA / 表单 ---------- */
.cta{background:var(--ink-900);color:#EDE9E1;padding:64px 0;}
@media(min-width:1024px){.cta{padding:104px 0;}}
.cta-grid{display:grid;grid-template-columns:1fr;gap:44px;}
@media(min-width:1024px){.cta-grid{grid-template-columns:5fr 7fr;gap:72px;align-items:start;}}
.cta h2{color:#F7F5F1;font-size:clamp(26px,3.2vw,40px);}
.cta-lead{margin-top:18px;color:rgba(247,245,241,.68);max-width:34ch;font-size:15.5px;}
.cta-meta{margin-top:32px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);font-size:13.5px;color:rgba(247,245,241,.6);}
.cta-meta a{color:rgba(247,245,241,.86);border-bottom:1px solid rgba(255,255,255,.2);}
.cta-meta a:hover{color:#fff;border-color:var(--primary);}
.form-grid{display:grid;grid-template-columns:1fr;gap:26px;}
@media(min-width:768px){.form-grid.two{grid-template-columns:1fr 1fr;}}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:12px;letter-spacing:.1em;color:rgba(247,245,241,.6);font-weight:500;}
.field input,.field select,.field textarea{
  background:transparent;border:none;border-bottom:1px solid rgba(255,255,255,.2);
  padding:10px 0;color:#F7F5F1;font-size:15.5px;border-radius:0;
  transition:border-color .24s var(--ease);
}
.field textarea{resize:vertical;min-height:96px;line-height:1.8;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-bottom-color:var(--primary);}
.field select option{color:var(--ink-900);}
.field.has-error input,.field.has-error textarea{border-bottom-color:var(--primary);}
.field-error{font-size:12.5px;color:var(--primary);display:none;}
.field.has-error .field-error{display:block;}
.pill-group{display:flex;flex-wrap:wrap;gap:10px;}
.pill{
  padding:7px 16px;border:1px solid rgba(255,255,255,.22);border-radius:999px;
  font-size:13.5px;color:rgba(247,245,241,.78);cursor:pointer;
  transition:border-color .24s var(--ease),color .24s var(--ease),background-color .24s var(--ease);
}
.pill:hover{border-color:rgba(247,245,241,.6);color:#fff;}
.pill.is-on{background:var(--primary);border-color:var(--primary);color:#fff;}
.form-actions{margin-top:8px;display:flex;flex-wrap:wrap;align-items:center;gap:18px;}
.form-note{font-size:13px;color:rgba(247,245,241,.55);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(247,245,241,.72);}
.footer-top{padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:40px;padding-bottom:48px;border-top:1px solid rgba(255,255,255,.12);padding-top:48px;}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;}}
.footer-brand{
  font-family:"Noto Serif SC","Songti SC",serif;font-weight:700;font-size:17px;
  color:#F7F5F1;letter-spacing:.04em;display:flex;flex-direction:column;gap:6px;
}
.footer-brand small{font-family:"Noto Sans SC",sans-serif;font-weight:400;font-size:12px;letter-spacing:.14em;color:rgba(247,245,241,.45);}
.footer-about{margin-top:18px;font-size:14px;line-height:1.9;max-width:32ch;color:rgba(247,245,241,.6);}
.footer-col h4{
  font-family:"Noto Sans SC",sans-serif;font-size:12px;letter-spacing:.12em;font-weight:500;
  color:rgba(247,245,241,.45);margin-bottom:18px;
}
.footer-col li{margin-bottom:12px;}
.footer-col a{font-size:14px;transition:color .24s var(--ease);}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:22px 0 28px;border-top:1px solid rgba(255,255,255,.12);font-size:12.5px;
  color:rgba(247,245,241,.45);letter-spacing:.03em;
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}