/* roulang page: index */
:root{
  --ink-900:#0E1A17;
  --ink-700:#14312B;
  --ink-500:#1F4A41;
  --accent:#D96C2C;
  --bg:#F6F5F1;
  --surface:#FFFFFF;
  --soft:#EFEEE8;
  --line:#E6E4DD;
  --text:#1B211F;
  --text-sub:#5E6864;
  --text-mute:#8C948F;
  --r-pill:999px;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --s1:0 1px 2px rgba(15,26,23,.05);
  --s2:0 10px 30px -14px rgba(15,26,23,.18);
  --s3:0 28px 60px -30px rgba(15,26,23,.28);
  --gutter:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;}
input{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.serif{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;}

/* ---------- 布局 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 48px;}
.container-narrow{max-width:820px;}

/* ---------- 导航 ---------- */
.nav-wrap{position:fixed;top:12px;left:0;right:0;z-index:90;display:flex;justify-content:center;padding:0 16px;}
.nav-pill{
  width:min(1120px,100%);height:64px;
  display:flex;align-items:center;gap:18px;
  padding:0 10px 0 20px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  background:transparent;
  transition:background .28s ease,box-shadow .28s ease,border-color .28s ease,backdrop-filter .28s ease;
}
.nav-wrap.scrolled .nav-pill{
  background:rgba(246,245,241,.74);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-color:var(--line);
  box-shadow:var(--s2);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:17px;color:var(--ink-900);letter-spacing:-.01em;flex-shrink:0;}
.brand-mark{width:26px;height:26px;flex-shrink:0;}
.brand-mark svg{width:100%;height:100%;display:block;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:40px;
  padding:0 14px;border-radius:var(--r-pill);
  font-size:14.5px;color:var(--text-sub);
  transition:color .18s ease,background .18s ease;
}
.nav-links a:hover{color:var(--ink-900);background:rgba(20,49,43,.06);}
.nav-links a.active{color:var(--ink-900);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;bottom:4px;transform:translateX(-50%);
  width:16px;height:2px;border-radius:2px;background:var(--accent);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:6px;height:44px;padding:0 20px;
  border-radius:var(--r-pill);background:var(--ink-700);color:#fff;
  font-size:14.5px;font-weight:600;flex-shrink:0;
  transition:background .18s ease,transform .18s ease;
}
.nav-cta:hover{background:var(--ink-500);}
.nav-burger{
  display:none;width:44px;height:44px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:rgba(255,255,255,.7);
  align-items:center;justify-content:center;flex-shrink:0;
}
.nav-burger span{display:block;width:18px;height:1.6px;background:var(--ink-900);position:relative;}
.nav-burger span::before,.nav-burger span::after{content:"";position:absolute;left:0;width:18px;height:1.6px;background:var(--ink-900);}
.nav-burger span::before{top:-6px;}
.nav-burger span::after{top:6px;}
.mobile-panel{
  display:none;position:fixed;top:84px;left:16px;right:16px;z-index:88;
  background:rgba(246,245,241,.92);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:22px;box-shadow:var(--s3);
  padding:14px;
}
.mobile-panel.open{display:block;}
.mobile-panel a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 14px;border-radius:14px;
  font-size:15px;color:var(--text);
}
.mobile-panel a:hover,.mobile-panel a.active{background:rgba(20,49,43,.07);color:var(--ink-900);}
.mobile-panel .m-cta{margin-top:8px;background:var(--ink-700);color:#fff;font-weight:600;justify-content:center;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:50px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background .2s ease,transform .12s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--ink-700);color:#fff;box-shadow:var(--s2);}
.btn-primary:hover{background:var(--ink-500);}
.btn-primary:active{transform:translateY(1px);}
.btn-primary .btn-arrow{transition:transform .2s ease;}
.btn-primary:hover .btn-arrow{transform:translateX(4px);}
.btn-ghost{background:transparent;color:var(--ink-700);border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--ink-700);background:rgba(20,49,43,.04);}
.link-arrow{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--ink-700);padding:6px 0;
}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:0;height:1.5px;width:0;
  background:var(--accent);transition:width .24s ease;
}
.link-arrow:hover::after{width:100%;}
.link-arrow:hover{color:var(--ink-900);}
.link-arrow .btn-arrow{transition:transform .2s ease;}
.link-arrow:hover .btn-arrow{transform:translateX(4px);}

/* ---------- 标签 ---------- */
.eyebrow{
  display:inline-block;font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--text-mute);font-weight:600;
}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);border:1px solid var(--line);
  background:rgba(20,49,43,.04);color:var(--ink-700);
  font-size:12px;font-weight:600;white-space:nowrap;
}
.tag-accent{border-color:rgba(217,108,44,.35);background:rgba(217,108,44,.09);color:#B6551E;}

/* ---------- 标题层级 ---------- */
.h1{
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  font-size:clamp(34px,5.2vw,62px);font-weight:600;line-height:1.16;
  letter-spacing:-.02em;color:var(--ink-900);
}
.h2{
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  font-size:clamp(26px,3vw,38px);font-weight:600;line-height:1.24;
  letter-spacing:-.015em;color:var(--ink-900);
}
.h3{
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  font-size:21px;font-weight:600;line-height:1.4;color:var(--ink-900);
}
.lead{font-size:17px;color:var(--text-sub);line-height:1.85;}
.body-text{font-size:16px;color:var(--text-sub);line-height:1.85;}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head .eyebrow{margin-bottom:14px;}
.sec-head .h2{margin-bottom:16px;}

/* ---------- Hero ---------- */
main{padding-top:88px;}
.hero{position:relative;padding:72px 0 96px;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(20,49,43,.07) 1px,transparent 1px);
  background-size:26px 26px;
  -webkit-mask-image:radial-gradient(60% 60% at 70% 20%,#000 0%,transparent 75%);
  mask-image:radial-gradient(60% 60% at 70% 20%,#000 0%,transparent 75%);
  pointer-events:none;
}
.hero-grid{
  position:relative;display:grid;grid-template-columns:6fr 5fr;gap:32px;
  align-items:center;
}
.hero-copy .eyebrow{margin-bottom:18px;}
.hero-copy .h1{margin-bottom:22px;max-width:15em;}
.hero-sub{
  font-size:17.5px;line-height:1.8;color:var(--text-sub);
  max-width:30em;margin-bottom:34px;
}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:22px;}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:12px 28px;margin-top:44px;
  padding-top:26px;border-top:1px solid var(--line);
}
.hero-facts li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-sub);}
.hero-facts li b{font-size:19px;color:var(--ink-700);font-weight:600;font-family:"Noto Serif SC","Songti SC",serif;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;border-radius:var(--r-img);
  box-shadow:var(--s3);object-fit:cover;aspect-ratio:4/3;
}
.hero-frame{
  position:absolute;inset:auto -14px -14px auto;
  width:60%;height:56%;border:1px solid rgba(20,49,43,.22);
  border-radius:var(--r-img);z-index:-1;
}

/* ---------- 品牌主张 ---------- */
.claim{padding:56px 0 12px;}
.claim-inner{max-width:820px;}
.claim .h2{font-size:clamp(24px,2.6vw,34px);margin-bottom:22px;}
.claim p{max-width:44em;}

/* ---------- 故事 ---------- */
.story{padding:104px 0 96px;background:var(--surface);}
.story-grid{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center;}
.story-media{position:relative;margin-top:-32px;}
.story-media img{width:100%;border-radius:var(--r-img);box-shadow:var(--s2);aspect-ratio:5/4;object-fit:cover;}
.story-media .story-chip{
  position:absolute;left:-16px;bottom:24px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:14px;box-shadow:var(--s2);padding:14px 18px;
  font-size:13px;color:var(--text-sub);max-width:230px;line-height:1.6;
}
.story-media .story-chip b{display:block;color:var(--ink-900);font-size:15px;margin-bottom:2px;}
.story-text .h2{margin-bottom:20px;}
.story-list{margin-top:28px;display:grid;gap:16px;}
.story-list li{display:flex;gap:12px;font-size:15px;color:var(--text-sub);}
.story-list li span{color:var(--accent);font-weight:700;flex-shrink:0;}

/* ---------- 精选内容 ---------- */
.feature{padding:104px 0;}
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:28px;}
.f-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--s1);
  transition:transform .16s ease-out,box-shadow .16s ease-out,border-color .16s ease-out;
}
.f-card:hover{transform:translateY(-4px);box-shadow:var(--s2);border-color:rgba(20,49,43,.2);}
.f-thumb{overflow:hidden;}
.f-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.f-card:hover .f-thumb img{transform:scale(1.04);}
.f-body{padding:24px 26px 28px;display:flex;flex-direction:column;gap:12px;flex:1;}
.f-card-lg{grid-row:span 2;}
.f-card-lg .f-thumb{aspect-ratio:16/9;}
.f-card-lg .f-body .h3{font-size:26px;line-height:1.3;}
.f-col{display:grid;gap:28px;}
.f-card-sm .f-thumb{aspect-ratio:16/10;}
.f-card-sm .f-body{padding:20px 22px 24px;}
.f-body p{font-size:14.5px;color:var(--text-sub);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.f-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-mute);}
.f-foot .go{color:var(--ink-700);font-weight:600;transition:transform .2s ease;}
.f-card:hover .f-foot .go{transform:translateX(4px);}

/* ---------- 最新信息列表 ---------- */
.latest{padding:104px 0;background:var(--soft);}
.latest-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:20px;margin-bottom:40px;
}
.latest-head .h2{margin-bottom:10px;}
.latest-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;}
.post-row{
  display:grid;grid-template-columns:112px 1fr auto;gap:24px;align-items:center;
  padding:22px 28px;border-bottom:1px solid var(--line);
  transition:background .16s ease;
}
.post-row:last-child{border-bottom:0;}
.post-row:hover{background:rgba(20,49,43,.035);}
.post-date{font-size:13px;color:var(--text-mute);letter-spacing:.02em;}
.post-title{font-size:17px;font-weight:600;color:var(--ink-900);line-height:1.5;margin-bottom:6px;}
.post-row:hover .post-title{color:var(--ink-500);}
.post-excerpt{
  font-size:14px;color:var(--text-sub);line-height:1.65;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{display:flex;align-items:center;gap:16px;}
.post-meta .go{color:var(--ink-700);font-size:16px;transition:transform .2s ease;}
.post-row:hover .post-meta .go{transform:translateX(4px);}
.empty-state{
  padding:64px 28px;text-align:center;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);
}
.empty-state .shape{
  width:96px;height:72px;margin:0 auto 20px;border:1px solid var(--line);
  border-radius:14px;position:relative;
}
.empty-state .shape::before{
  content:"";position:absolute;left:16px;right:16px;top:20px;height:1px;background:var(--line);
}
.empty-state .shape::after{
  content:"";position:absolute;left:16px;right:36px;top:36px;height:1px;background:var(--line);
}
.empty-state p{font-size:15px;color:var(--text-sub);margin-bottom:16px;}

/* ---------- 信任背书 ---------- */
.trust{background:var(--ink-900);color:#fff;padding:100px 0;}
.trust .eyebrow{color:rgba(255,255,255,.5);}
.trust .h2{color:#fff;margin:14px 0 48px;max-width:24em;}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;}
.trust-item{border-top:1px solid rgba(255,255,255,.16);padding-top:22px;}
.trust-num{
  font-family:"Noto Serif SC","Songti SC",serif;
  font-size:clamp(30px,3.4vw,44px);font-weight:600;line-height:1.1;
  color:#fff;margin-bottom:10px;
}
.trust-num em{font-style:normal;color:var(--accent);font-size:.6em;margin-left:4px;}
.trust-item p{font-size:14px;color:rgba(255,255,255,.66);line-height:1.7;}

/* ---------- FAQ ---------- */
.faq{padding:104px 0;}
.faq-grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:18px 4px 18px 0;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--ink-900);line-height:1.5;
}
.faq-q:hover{color:var(--ink-500);}
.faq-icon{position:relative;width:18px;height:18px;flex-shrink:0;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink-700);border-radius:2px;
  transition:transform .22s ease,opacity .22s ease;
}
.faq-icon::before{left:0;top:8px;width:18px;height:1.6px;}
.faq-icon::after{left:8px;top:0;width:1.6px;height:18px;}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .22s ease;
}
.faq-a-inner{
  margin:0 16px 22px 16px;padding-left:16px;
  border-left:2px solid var(--accent);
  font-size:15px;color:var(--text-sub);line-height:1.85;
}
.faq-item.open .faq-a{max-height:340px;}
.faq-side{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--s1);
}
.faq-side .h3{margin-bottom:14px;}
.faq-side ul{display:grid;gap:14px;margin-top:20px;}
.faq-side li{display:flex;gap:10px;font-size:14px;color:var(--text-sub);}
.faq-side li b{color:var(--ink-700);font-family:"Noto Serif SC","Songti SC",serif;}

/* ---------- CTA 表单 ---------- */
.cta-band{background:var(--ink-900);padding:88px 0;}
.cta-inner{max-width:720px;margin:0 auto;text-align:center;}
.cta-inner .h2{color:#fff;margin-bottom:16px;}
.cta-inner p{color:rgba(255,255,255,.68);font-size:16px;margin-bottom:34px;}
.cta-form{display:flex;gap:12px;justify-content:center;}
.cta-form input{
  flex:1;min-width:0;height:50px;padding:0 18px;border-radius:var(--r-input);
  border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.06);
  color:#fff;font-size:15px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cta-form input::placeholder{color:rgba(255,255,255,.42);}
.cta-form input:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(217,108,44,.18);
  background:rgba(255,255,255,.1);
}
.cta-form .btn-primary{background:var(--accent);flex-shrink:0;}
.cta-form .btn-primary:hover{background:#C25E22;}
.cta-note{margin-top:18px;font-size:13px;color:rgba(255,255,255,.42);}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:72px 0 0;border-top:1px solid rgba(255,255,255,.08);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:52px;}
.footer h4{
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(255,255,255,.45);font-weight:600;margin-bottom:18px;
}
.footer .f-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:600;font-size:17px;margin-bottom:16px;}
.footer .f-brand svg{width:24px;height:24px;}
.footer p{font-size:14px;line-height:1.8;}
.footer ul{display:grid;gap:11px;}
.footer ul a{font-size:14px;color:rgba(255,255,255,.72);transition:color .18s ease;}
.footer ul a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0 26px;display:flex;flex-wrap:wrap;gap:10px 24px;
  justify-content:space-between;font-size:12px;color:rgba(255,255,255,.4);
}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(16px);}
.reveal.in{
  opacity:1;transform:none;
  transition:opacity .6s cubic-bezier(.22,.61,.36,1),transform .6s cubic-bezier(.22,.61,.36,1);
}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px;}

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

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .container{padding:0 40px;}
}
@media (max-width:1024px){
  .container{padding:0 28px;}
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero-copy .h1{max-width:none;}
  .hero-visual{order:2;}
  .story-grid{grid-template-columns:1fr;gap:40px;}
  .story-media{margin-top:0;}
  .feature-grid{grid-template-columns:1fr;}
  .f-card-lg{grid-row:auto;}
  .f-col{grid-template-columns:1fr 1fr;}
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:24px;}
  .faq-grid{grid-template-columns:1fr;gap:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-burger{display:inline-flex;}
  .nav-pill{margin-left:auto;}
  .brand{margin-right:auto;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  main{padding-top:80px;}
  .hero{padding:40px 0 64px;}
  .claim{padding:40px 0 8px;}
  .story{padding:64px 0;}
  .feature{padding:64px 0;}
  .latest{padding:64px 0;}
  .trust{padding:64px 0;}
  .faq{padding:64px 0;}
  .cta-band{padding:64px 0;}
  .footer{padding:56px 0 0;}
  .sec-head{margin-bottom:32px;}
  .f-col{grid-template-columns:1fr;}
  .post-row{grid-template-columns:1fr;gap:8px;padding:20px;}
  .post-meta{justify-content:space-between;}
  .post-date{order:-1;}
  .cta-form{flex-direction:column;}
  .cta-form .btn{width:100%;}
  .hero-facts{gap:10px 20px;margin-top:32px;}
  .trust-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .f-card:hover,.post-row:hover{transform:none;}
}
@media (max-width:520px){
  .hero-actions{flex-direction:column;align-items:flex-start;gap:16px;}
  .hero-actions .btn{width:100%;}
  .brand span{font-size:15.5px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}

/* roulang page: article */
:root{
  --ink-900:#0E1A17;
  --ink-700:#14312B;
  --ink-500:#1F4A41;
  --accent:#D96C2C;
  --bg:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E6E4DD;
  --text:#1B211F;
  --text-sub:#5E6864;
  --text-mute:#8C948F;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --r-pill:999px;
  --s1:0 1px 2px rgba(15,26,23,.05);
  --s2:0 10px 30px -14px rgba(15,26,23,.18);
  --s3:0 28px 60px -30px rgba(15,26,23,.28);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:600;letter-spacing:-.02em;margin:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 28px}}
@media(min-width:1024px){.container{padding:0 48px}}

/* ---------- 悬浮胶囊导航 ---------- */
.nav-wrap{
  position:fixed;
  top:14px;
  left:50%;
  transform:translateX(-50%);
  width:min(1120px,92vw);
  z-index:60;
}
.nav-pill{
  height:64px;
  display:flex;
  align-items:center;
  gap:18px;
  padding:0 10px 0 20px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  background:transparent;
  transition:background .3s ease,box-shadow .3s ease,border-color .3s ease,backdrop-filter .3s ease;
}
.nav-wrap.is-scrolled .nav-pill{
  background:rgba(246,245,241,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-color:var(--line);
  box-shadow:var(--s2);
}
.brand{
  display:flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-serif);
  font-weight:600;
  font-size:18px;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-mark{
  width:28px;height:28px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-pill);
  background:var(--surface);
  border:1px solid var(--line);
  flex:none;
}
.brand-mark svg{width:18px;height:18px}
.nav-links{display:none;align-items:center;gap:4px;margin-left:auto}
.nav-links a{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 12px;
  font-size:14.5px;
  color:var(--text-sub);
  border-radius:var(--r-pill);
  transition:color .18s ease,background .18s ease;
}
.nav-links a:hover{color:var(--ink-700);background:rgba(20,49,43,.06)}
.nav-links a.active{color:var(--ink-700);font-weight:600}
.nav-links a.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:4px;
  height:2px;
  border-radius:2px;
  background:var(--accent);
}
.nav-cta{
  display:none;
  align-items:center;
  justify-content:center;
  height:44px;
  padding:0 20px;
  border-radius:var(--r-pill);
  background:var(--ink-700);
  color:#fff;
  font-size:14.5px;
  font-weight:600;
  white-space:nowrap;
  transition:background .18s ease,transform .12s ease;
}
.nav-cta:hover{background:var(--ink-500)}
.nav-cta:active{transform:translateY(1px)}
.nav-burger{
  margin-left:auto;
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--surface);
  cursor:pointer;
}
.nav-burger span{
  display:block;width:16px;height:1.6px;background:var(--ink-700);position:relative;
}
.nav-burger span::before,
.nav-burger span::after{
  content:"";position:absolute;left:0;width:16px;height:1.6px;background:var(--ink-700);
}
.nav-burger span::before{top:-5px}
.nav-burger span::after{top:5px}
.nav-drawer{
  display:none;
  margin-top:10px;
  padding:10px;
  border-radius:22px;
  border:1px solid var(--line);
  background:rgba(246,245,241,.9);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:var(--s2);
}
.nav-drawer.is-open{display:block}
.nav-drawer a{
  display:flex;
  align-items:center;
  min-height:48px;
  padding:0 14px;
  border-radius:var(--r-input);
  font-size:15px;
  color:var(--text-sub);
}
.nav-drawer a.active{color:var(--ink-700);font-weight:600;background:rgba(20,49,43,.06)}
.nav-drawer .drawer-cta{
  margin-top:6px;
  justify-content:center;
  background:var(--ink-700);
  color:#fff;
  font-weight:600;
}
@media(min-width:1024px){
  .nav-links{display:flex}
  .nav-cta{display:inline-flex}
  .nav-burger{display:none}
  .nav-drawer{display:none !important}
}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:104px 0 0}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-mute);
}
.crumb a{color:var(--text-mute);transition:color .18s ease}
.crumb a:hover{color:var(--ink-700)}
.crumb .sep{color:var(--line)}
.crumb .current{color:var(--text)}

/* ---------- 文章头 ---------- */
.article-head{padding:26px 0 0;max-width:760px;margin:0 auto}
.badge{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:var(--r-pill);
  border:1px solid rgba(20,49,43,.22);
  background:rgba(20,49,43,.05);
  color:var(--ink-700);
  font-size:12px;
  letter-spacing:.02em;
}
.article-head h1{
  margin-top:18px;
  font-size:clamp(28px,3.6vw,42px);
  line-height:1.22;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  margin-top:18px;
  padding-bottom:22px;
  border-bottom:1px solid var(--line);
  font-size:14px;
  color:var(--text-mute);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.cover-figure{margin:30px auto 0;max-width:760px}
.cover-frame{
  overflow:hidden;
  border-radius:var(--r-img);
  border:1px solid var(--line);
  background:var(--surface);
}
.cover-frame img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease}
.cover-frame:hover img{transform:scale(1.04)}
.cover-cap{margin-top:10px;font-size:13px;color:var(--text-mute);text-align:center}

/* ---------- 正文排版 ---------- */
.article-body{
  max-width:760px;
  margin:0 auto;
  padding:38px 0 0;
  font-size:17px;
  line-height:1.9;
  color:var(--text);
}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.35;
  margin:2.2em 0 .7em;
  padding-left:14px;
  border-left:3px solid var(--ink-700);
}
.article-body h3{font-size:20px;margin:1.7em 0 .6em}
.article-body h4{font-size:17px;margin:1.4em 0 .5em;color:var(--ink-700)}
.article-body blockquote{
  margin:1.6em 0;
  padding:4px 0 4px 18px;
  border-left:3px solid var(--ink-700);
  color:var(--text-sub);
  background:rgba(20,49,43,.03);
  border-radius:0 10px 10px 0;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.2em}
.article-body ul{list-style:none;padding-left:0}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.55em}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.72em;
  width:10px;height:1.6px;
  background:var(--accent);
}
.article-body ol{list-style:decimal}
.article-body ol li{margin-bottom:.55em;padding-left:.2em}
.article-body ol li::marker{color:var(--ink-700);font-weight:600}
.article-body img{
  border-radius:var(--r-img);
  margin:1.6em auto;
  border:1px solid var(--line);
}
.article-body figure{margin:1.8em 0}
.article-body figcaption{
  margin-top:10px;
  font-size:13px;
  color:var(--text-mute);
  text-align:center;
}
.article-body a{
  color:var(--ink-700);
  border-bottom:1px solid rgba(20,49,43,.3);
  transition:border-color .2s ease,color .2s ease;
}
.article-body a:hover{color:var(--accent);border-color:var(--accent)}
.article-body strong{color:var(--ink-900)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}

/* ---------- 空态 ---------- */
.empty-state{
  max-width:760px;
  margin:0 auto;
  padding:56px 24px;
  border:1px dashed var(--line);
  border-radius:var(--r-card);
  background:var(--surface);
  text-align:center;
}
.empty-state .empty-mark{
  width:64px;height:64px;
  margin:0 auto 18px;
  border:1px solid var(--line);
  border-radius:16px;
  display:flex;align-items:center;justify-content:center;
}
.empty-state .empty-mark svg{width:26px;height:26px}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--text-sub);font-size:15px;margin-bottom:18px}

/* ---------- 按钮 / 文本链 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-pill);
  background:var(--ink-700);
  color:#fff;
  font-size:15px;
  font-weight:600;
  border:1px solid var(--ink-700);
  transition:background .18s ease,transform .12s ease;
}
.btn:hover{background:var(--ink-500);border-color:var(--ink-500)}
.btn:hover .arrow{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn .arrow{transition:transform .18s ease}
.btn-ghost{
  background:transparent;
  color:var(--ink-700);
  border:1px solid rgba(20,49,43,.3);
}
.btn-ghost:hover{background:rgba(20,49,43,.06);border-color:var(--ink-700);color:var(--ink-700)}
.text-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  color:var(--ink-700);
  font-weight:600;
}
.text-link::after{
  content:"";
  position:absolute;
  left:0;bottom:-3px;
  width:0;height:1.5px;
  background:var(--accent);
  transition:width .24s ease;
}
.text-link:hover::after{width:100%}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--ink-700);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 文末动作区 ---------- */
.article-foot{
  max-width:760px;
  margin:0 auto;
  padding:44px 0 0;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.article-foot .note{font-size:14px;color:var(--text-mute)}

/* ---------- CTA 条 ---------- */
.cta-section{padding:96px 0}
.cta-band{
  background:var(--ink-900);
  border-radius:26px;
  padding:56px 28px;
  text-align:center;
  color:#F2F1EC;
}
.cta-band h2{
  font-size:clamp(24px,2.6vw,34px);
  color:#fff;
  line-height:1.3;
}
.cta-band p{
  margin:14px auto 26px;
  max-width:560px;
  color:rgba(242,241,236,.72);
  font-size:15px;
}
.cta-band .btn{background:var(--accent);border-color:var(--accent)}
.cta-band .btn:hover{background:#c25c22;border-color:#c25c22}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink-900);color:rgba(242,241,236,.7);padding:72px 0 26px;margin-top:40px}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.f-brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-serif);font-weight:600;font-size:18px;color:#fff;
  margin-bottom:14px;
}
.f-brand svg{width:22px;height:22px}
.footer p{font-size:14px;line-height:1.8;color:rgba(242,241,236,.62)}
.footer h4{
  font-family:var(--font-sans);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:rgba(242,241,236,.5);
  margin-bottom:16px;
  font-weight:600;
}
.footer li{margin-bottom:11px}
.footer li a{
  font-size:14px;
  color:rgba(242,241,236,.72);
  transition:color .18s ease;
}
.footer li a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid rgba(242,241,236,.12);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px;
  font-size:12px;
  color:rgba(242,241,236,.45);
}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .6s cubic-bezier(.22,.61,.36,1),transform .6s cubic-bezier(.22,.61,.36,1);
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  .cover-frame:hover img{transform:none}
  .btn:hover .arrow{transform:none}
}

/* roulang page: category1 */
:root{
  --ink-900:#0E1A17;
  --ink-700:#14312B;
  --ink-500:#1F4A41;
  --accent:#D96C2C;
  --bg:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E6E4DD;
  --text:#1B211F;
  --text-sub:#5E6864;
  --text-mute:#8C948F;
  --r-pill:999px;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --s1:0 1px 2px rgba(15,26,23,.05);
  --s2:0 10px 30px -14px rgba(15,26,23,.18);
  --s3:0 28px 60px -30px rgba(15,26,23,.28);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:600;letter-spacing:-.02em;color:var(--text)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
svg{display:block}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 48px}

/* ---------- 悬浮胶囊导航 ---------- */
.nav-wrap{
  position:fixed;top:0;left:0;right:0;z-index:90;
  display:flex;justify-content:center;
  padding:16px 0 0;
  color:#FFFFFF;
  pointer-events:none;
  transition:color .24s ease;
}
.nav-wrap.scrolled{color:var(--text)}
.nav-pill{
  pointer-events:auto;
  position:relative;
  width:min(1120px,92vw);
  height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 12px 0 20px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  background:transparent;
  transition:background .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.nav-wrap.scrolled .nav-pill{
  background:rgba(246,245,241,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-color:rgba(230,228,221,.9);
  box-shadow:var(--s2);
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;font-family:var(--font-serif);font-size:18px;font-weight:600;letter-spacing:-.01em}
.brand-mark{
  width:34px;height:34px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;
  background:rgba(255,255,255,.94);
  transition:background .24s ease;
}
.nav-wrap.scrolled .brand-mark{background:rgba(20,49,43,.08)}
.brand-mark svg{width:20px;height:20px}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{
  position:relative;
  display:inline-flex;align-items:center;height:44px;padding:0 12px;
  font-size:15px;color:currentColor;
  transition:color .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:50%;bottom:6px;
  width:0;height:2px;border-radius:2px;background:var(--accent);
  transform:translateX(-50%);
  transition:width .24s ease;
}
.nav-links a:hover::after,.nav-links a.active::after{width:56%}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:42px;padding:0 20px;flex:none;
  border-radius:var(--r-pill);
  background:#FFFFFF;color:var(--ink-700);
  font-size:14px;font-weight:600;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.nav-wrap.scrolled .nav-cta{background:var(--ink-700);color:#FFFFFF}
.nav-wrap.scrolled .nav-cta:hover{background:var(--ink-500)}
.nav-cta:hover{background:var(--ink-500);color:#FFFFFF}
.nav-cta:active{transform:translateY(1px)}
.nav-burger{
  display:none;width:44px;height:44px;flex:none;
  align-items:center;justify-content:center;
  border-radius:var(--r-pill);color:currentColor;
}
.nav-burger span{position:relative;display:block;width:18px;height:1.5px;background:currentColor;border-radius:2px;transition:background .2s ease}
.nav-burger span::before,.nav-burger span::after{content:"";position:absolute;left:0;width:18px;height:1.5px;background:currentColor;border-radius:2px;transition:transform .24s ease}
.nav-burger span::before{top:-6px}
.nav-burger span::after{top:6px}
.nav-wrap.open .nav-burger span{background:transparent}
.nav-wrap.open .nav-burger span::before{transform:translateY(6px) rotate(45deg)}
.nav-wrap.open .nav-burger span::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- 页头区 ---------- */
.page-head{position:relative;background:var(--ink-900);overflow:hidden;padding:152px 0 96px}
.page-head .bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.5;
}
.page-head .veil{position:absolute;inset:0;background:rgba(14,26,23,.74)}
.page-head .container{position:relative;z-index:2;color:#FFFFFF}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.62);margin-bottom:26px}
.crumb a{transition:color .2s ease}
.crumb a:hover{color:#FFFFFF;text-decoration:underline;text-underline-offset:4px}
.crumb .sep{color:rgba(255,255,255,.34)}
.crumb .current{color:#FFFFFF}
.page-head h1{
  color:#FFFFFF;
  font-size:clamp(34px,5.2vw,62px);
  line-height:1.16;
  letter-spacing:-.02em;
  max-width:15em;
}
.page-head .lead{
  margin-top:24px;
  max-width:640px;
  font-size:17px;
  line-height:1.85;
  color:rgba(255,255,255,.76);
}
.head-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px}
.head-tags span{
  display:inline-flex;align-items:center;height:34px;padding:0 18px;
  border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.28);
  font-size:13px;color:rgba(255,255,255,.86);
}

/* ---------- 通用板块 ---------- */
.section{padding:104px 0}
.section-bg{background:var(--bg)}
.section-white{background:var(--surface)}
.section-dark{background:var(--ink-900);color:#FFFFFF}
.sec-label{
  display:block;
  font-family:var(--font-sans);
  font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--text-mute);margin-bottom:18px;font-weight:600;
}
.section-dark .sec-label{color:rgba(255,255,255,.5)}
.sec-head{max-width:720px;margin-bottom:52px}
.sec-head h2{font-size:clamp(26px,3vw,38px);line-height:1.28}
.section-dark .sec-head h2{color:#FFFFFF}
.sec-head p{margin-top:18px;color:var(--text-sub);font-size:16px}
.section-dark .sec-head p{color:rgba(255,255,255,.68)}

/* ---------- 编号要点区 ---------- */
.step-list{border-top:1px solid var(--line)}
.step{
  display:grid;grid-template-columns:104px 1fr;gap:32px;
  padding:36px 0;
  border-bottom:1px solid var(--line);
  transition:background .2s ease;
}
.step:hover{background:rgba(20,49,43,.028)}
.step-no{
  font-family:var(--font-serif);
  font-size:30px;line-height:1;color:var(--ink-700);opacity:.3;
  padding-top:6px;
}
.step h3{font-size:21px;margin-bottom:10px}
.step p{color:var(--text-sub);max-width:760px}
.step .mini{margin-top:14px;font-size:14px;color:var(--text-mute)}

/* ---------- 图文对照区 ---------- */
.split{display:grid;grid-template-columns:5fr 6fr;gap:56px;align-items:center}
.media{
  position:relative;overflow:hidden;
  border-radius:var(--r-img);
  box-shadow:var(--s2);
  background:var(--ink-900);
}
.media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.media:hover img{transform:scale(1.04)}
.check-list li{
  position:relative;
  padding:16px 0 16px 26px;
  border-bottom:1px dashed var(--line);
  color:var(--text-sub);
}
.check-list li:last-child{border-bottom:0}
.check-list li::before{
  content:"";position:absolute;left:0;top:28px;
  width:12px;height:1.5px;background:var(--accent);border-radius:2px;
}
.check-list li strong{color:var(--text);font-weight:600}
.note-card{
  margin-top:32px;padding:26px 28px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--s1);
}
.note-card h3{font-size:18px;margin-bottom:10px}
.note-card p{font-size:15px;color:var(--text-sub)}

/* ---------- 设备区 ---------- */
.dev-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:rgba(255,255,255,.13);
  border:1px solid rgba(255,255,255,.13);
  border-radius:var(--r-card);
  overflow:hidden;
}
.dev-item{background:var(--ink-900);padding:32px 26px;transition:background .2s ease}
.dev-item:hover{background:#132722}
.dev-item .idx{
  font-family:var(--font-serif);font-size:13px;letter-spacing:.16em;
  color:var(--accent);margin-bottom:14px;display:block;
}
.dev-item h3{color:#FFFFFF;font-size:18px;margin-bottom:10px}
.dev-item p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.64)}

/* ---------- 问答手风琴 ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  position:relative;
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 0 26px 18px;
  text-align:left;
  font-family:var(--font-serif);font-size:17px;font-weight:600;
  transition:color .2s ease;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:50%;
  width:2px;height:0;background:var(--accent);
  transform:translateY(-50%);
  transition:height .22s ease;
}
.faq-item.open .faq-q::before{height:26px}
.faq-q:hover{color:var(--ink-500)}
.faq-icon{position:relative;width:18px;height:18px;flex:none}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink-700);
  transition:transform .22s ease,opacity .22s ease;
}
.faq-icon::before{left:0;top:8px;width:18px;height:1.5px;border-radius:2px}
.faq-icon::after{left:8px;top:0;width:1.5px;height:18px;border-radius:2px}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-item.open .faq-a{max-height:420px}
.faq-a p{padding:0 16px 26px;color:var(--text-sub);max-width:780px}

/* ---------- 按钮与链接 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:50px;padding:0 28px;
  border-radius:var(--r-pill);
  background:var(--ink-700);color:#FFFFFF;
  font-size:15px;font-weight:600;
  transition:background .2s ease,transform .2s ease,color .2s ease;
}
.btn:hover{background:var(--ink-500)}
.btn:active{transform:translateY(1px)}
.btn .arw{transition:transform .2s ease}
.btn:hover .arw{transform:translateX(4px)}
.btn-light{background:#FFFFFF;color:var(--ink-700)}
.btn-light:hover{background:#EFEDE7;color:var(--ink-700)}
.text-link{
  position:relative;
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--ink-700);
  min-height:44px;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:6px;
  width:0;height:1.5px;background:var(--accent);
  transition:width .24s ease;
}
.text-link:hover::after{width:100%}
.section-dark .text-link{color:#FFFFFF}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--ink-900);
  border-radius:24px;
  padding:66px 40px;
  text-align:center;
  color:#FFFFFF;
  box-shadow:var(--s3);
}
.cta-band h2{color:#FFFFFF;font-size:clamp(24px,3vw,34px);line-height:1.3}
.cta-band p{margin:16px auto 30px;max-width:540px;color:rgba(255,255,255,.68);font-size:16px}
.cta-actions{display:flex;flex-wrap:wrap;gap:22px;justify-content:center;align-items:center}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:80px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.f-brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-serif);font-size:19px;font-weight:600;color:#FFFFFF;
  margin-bottom:18px;
}
.f-brand svg{width:26px;height:26px}
.footer h4{
  font-family:var(--font-sans);
  font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:rgba(255,255,255,.5);font-weight:600;margin-bottom:18px;
}
.footer p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:330px}
.footer ul li{margin-bottom:12px}
.footer ul a{
  display:inline-block;
  font-size:14px;color:rgba(255,255,255,.72);
  padding:3px 0;
  transition:color .2s ease;
}
.footer ul a:hover{color:#FFFFFF;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;
  margin-top:58px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:12px;color:rgba(255,255,255,.45);
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s cubic-bezier(.22,.61,.36,1),transform .6s cubic-bezier(.22,.61,.36,1)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .container{padding:0 28px}
  .section{padding:88px 0}
  .page-head{padding:140px 0 84px}
  .split{grid-template-columns:1fr;gap:38px}
  .dev-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .step{grid-template-columns:84px 1fr;gap:24px}
}
@media (max-width:900px){
  .nav-links a{padding:0 9px;font-size:14px}
  .brand{font-size:17px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:68px 0}
  .page-head{padding:122px 0 66px}
  .nav-links,.nav-cta{display:none}
  .nav-burger{display:flex}
  .nav-pill{padding:0 8px 0 14px}
  .brand{font-size:16px}
  .nav-wrap.open{color:var(--text)}
  .nav-wrap.open .nav-pill{
    background:rgba(246,245,241,.94);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-color:var(--line);
    box-shadow:var(--s2);
  }
  .nav-wrap.open .brand-mark{background:rgba(20,49,43,.08)}
  .nav-wrap.open .nav-links{
    display:flex;
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;
    padding:10px;
    border-radius:var(--r-card);
    border:1px solid var(--line);
    background:rgba(246,245,241,.95);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    box-shadow:var(--s2);
  }
  .nav-wrap.open .nav-links a{
    color:var(--text);height:48px;padding:0 16px;
    justify-content:flex-start;border-radius:12px;
  }
  .nav-wrap.open .nav-links a:hover{background:rgba(20,49,43,.06)}
  .nav-wrap.open .nav-links a::after{display:none}
  .step{grid-template-columns:1fr;gap:12px;padding:30px 0}
  .step-no{font-size:24px;padding-top:0}
  .dev-grid{grid-template-columns:1fr}
  .cta-band{padding:48px 22px;border-radius:20px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer{padding:60px 0 26px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .page-head h1{font-size:clamp(30px,8.4vw,40px)}
  .page-head .lead{font-size:16px}
  .head-tags span{padding:0 14px;font-size:12px}
  .sec-head{margin-bottom:38px}
  .faq-q{font-size:16px;padding:22px 0 22px 16px}
  .media{border-radius:12px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .media img,.btn,.btn .arw,.step,.dev-item,.faq-a,.faq-icon::before,.faq-icon::after{transition:none}
  .media:hover img{transform:none}
  .step:hover,.dev-item:hover{background:transparent}
}

/* roulang page: category2 */
:root{
  --ink-900:#0E1A17;
  --ink-700:#14312B;
  --ink-500:#1F4A41;
  --accent:#D96C2C;
  --bg:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E6E4DD;
  --text:#1B211F;
  --text-sub:#5E6864;
  --text-mute:#8C948F;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --r-pill:999px;
  --s1:0 1px 2px rgba(15,26,23,.05);
  --s2:0 10px 30px -14px rgba(15,26,23,.18);
  --s3:0 28px 60px -30px rgba(15,26,23,.28);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
}
html h1,html h2,html h3,html h4{
  margin:0;
  font-family:var(--font-serif);
  font-weight:600;
  line-height:1.22;
  letter-spacing:-.01em;
  color:var(--ink-900);
}
html p{margin:0}
html ul,html ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
::selection{background:rgba(217,108,44,.18)}
a:focus-visible,button:focus-visible{outline:2px solid var(--ink-700);outline-offset:3px;border-radius:8px}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:768px){.container{padding-left:28px;padding-right:28px}}
@media(min-width:1280px){.container{padding-left:48px;padding-right:48px}}

/* ---------- 悬浮胶囊导航 ---------- */
.nav-wrap{
  position:fixed;top:14px;left:50%;transform:translateX(-50%);
  width:min(1120px,92vw);z-index:60;
}
.nav-pill{
  position:relative;display:flex;align-items:center;justify-content:space-between;
  height:64px;padding:0 10px 0 20px;border-radius:var(--r-pill);
  background:rgba(246,245,241,.78);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.55);
  box-shadow:var(--s1);
  transition:background .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.nav-wrap.scrolled .nav-pill{
  background:rgba(246,245,241,.94);
  border-color:var(--line);
  box-shadow:var(--s2);
}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-serif);font-weight:600;font-size:17px;color:var(--ink-900)}
.brand-mark{display:flex;width:26px;height:26px}
.brand-mark svg{width:26px;height:26px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{position:relative;padding:8px 2px;font-size:15px;color:var(--text-sub);transition:color .16s ease}
.nav-links a:hover{color:var(--ink-700)}
.nav-links a.active{color:var(--ink-900);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;bottom:-2px;transform:translateX(-50%);
  width:16px;height:2px;border-radius:2px;background:var(--accent);
}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 20px;border-radius:var(--r-pill);
  background:var(--ink-700);color:#fff;font-size:14px;font-weight:600;
  transition:background .16s ease,transform .16s ease;
}
.nav-cta:hover{background:var(--ink-500)}
.nav-cta:active{transform:translateY(1px)}
.nav-burger{
  display:none;width:44px;height:44px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:rgba(255,255,255,.7);
}
.nav-burger span{position:relative;display:block;width:18px;height:1.5px;margin:0 auto;border-radius:2px;background:var(--ink-900)}
.nav-burger span::before,.nav-burger span::after{
  content:"";position:absolute;left:0;width:18px;height:1.5px;border-radius:2px;background:var(--ink-900);
}
.nav-burger span::before{top:-6px}
.nav-burger span::after{top:6px}

@media(max-width:960px){
  .nav-pill{padding-left:16px}
  .nav-links{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    display:none;flex-direction:column;align-items:stretch;gap:4px;padding:10px;
    background:rgba(246,245,241,.95);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border:1px solid var(--line);border-radius:20px;box-shadow:var(--s2);
  }
  .nav-wrap.open .nav-links{display:flex}
  .nav-links a{display:flex;align-items:center;min-height:44px;padding:0 14px;border-radius:12px;font-size:15px}
  .nav-links a:hover{background:rgba(20,49,43,.05)}
  .nav-links a.active{background:rgba(20,49,43,.06)}
  .nav-links a.active::after{display:none}
  .nav-burger{display:flex;align-items:center;justify-content:center}
  .nav-cta{padding:0 14px;font-size:13px}
}
@media(max-width:520px){
  .nav-cta{display:none}
}

/* ---------- 页头 ---------- */
.pagehead{
  position:relative;overflow:hidden;
  padding:158px 0 96px;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat var(--ink-900);
  color:#fff;
}
.pagehead::before{
  content:"";position:absolute;inset:0;
  background:rgba(14,26,23,.78);
}
.pagehead .container{position:relative;z-index:2;max-width:1100px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.6)}
.crumbs a{color:rgba(255,255,255,.82)}
.crumbs a:hover{color:#fff;text-decoration:underline}
.crumbs .cur{color:#fff}
.pagehead h1{
  margin-top:22px;color:#fff;
  font-size:clamp(34px,5.2vw,58px);line-height:1.16;letter-spacing:-.02em;
}
.pagehead .lede{
  margin-top:20px;max-width:660px;
  font-size:clamp(16px,1.7vw,18px);line-height:1.85;color:rgba(255,255,255,.82);
}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px}
.chip{
  font-size:12px;padding:7px 14px;border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.28);color:rgba(255,255,255,.9);
  background:rgba(255,255,255,.06);
}

/* ---------- 板块 ---------- */
.sec{padding:104px 0}
.sec-surface{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:52px}
.kicker{font-size:12px;letter-spacing:.22em;color:var(--text-mute)}
.sec-head h2{font-size:clamp(26px,3vw,38px);margin-top:14px}
.sec-head p{margin-top:18px;color:var(--text-sub)}

/* ---------- 编号要点 ---------- */
.num-list{border-top:1px solid var(--line)}
.num-item{
  display:grid;grid-template-columns:110px 1fr;gap:28px;
  padding:38px 0;border-bottom:1px solid var(--line);
  transition:background .16s ease-out,padding-left .16s ease-out;
}
.num-item:hover{background:rgba(20,49,43,.035);padding-left:12px}
.num{
  font-family:var(--font-serif);font-size:30px;line-height:1;letter-spacing:.02em;
  color:var(--accent);padding-top:2px;
}
.num-body h3{font-size:21px}
.num-body > p{margin-top:14px;max-width:780px;color:var(--text-sub)}
.dot-list{margin-top:18px;display:grid;gap:10px}
.dot-list li{position:relative;padding-left:18px;font-size:15px;color:var(--text-sub)}
.dot-list li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;
  border-radius:2px;background:var(--ink-700);
}

/* ---------- 图文错位双栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-media{
  border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--s2);
}
.split-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  transition:transform .5s cubic-bezier(.22,.61,.36,1);
}
.split-media:hover img{transform:scale(1.04)}
.split-text{padding-top:26px}
.split-text h2{font-size:clamp(26px,3vw,38px)}
.split-text p{margin-top:18px;color:var(--text-sub)}
.check-list{margin-top:24px;display:grid;gap:12px}
.check-list li{display:flex;gap:12px;font-size:15px;color:var(--text-sub)}
.check-list li::before{
  content:"";flex:0 0 8px;height:8px;margin-top:.62em;border-radius:2px;
  background:var(--accent);
}

/* ---------- 行式清单 ---------- */
.table-list{border-top:1px solid var(--line)}
.tl-row{
  display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:baseline;
  padding:22px 12px;border-bottom:1px solid var(--line);
  transition:background .16s ease-out;
}
.tl-row:hover{background:rgba(20,49,43,.035)}
.tl-key{font-family:var(--font-serif);font-size:17px;color:var(--ink-900)}
.tl-val{font-size:15px;color:var(--text-sub)}

/* ---------- 卡片 ---------- */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--s1);
  transition:transform .16s ease-out,box-shadow .16s ease-out,border-color .16s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--s2);border-color:rgba(20,49,43,.2)}
.card-media{overflow:hidden;aspect-ratio:16/10;background:var(--bg)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.22,.61,.36,1)}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{display:flex;flex-direction:column;gap:12px;flex:1;padding:24px}
.tag{
  align-self:flex-start;font-size:12px;padding:5px 12px;border-radius:var(--r-pill);
  border:1px solid rgba(20,49,43,.18);color:var(--ink-700);background:rgba(20,49,43,.05);
}
.card h3{font-size:19px}
.card p{font-size:15px;color:var(--text-sub)}
.link-arrow{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--ink-700);
  background-image:linear-gradient(currentColor,currentColor);
  background-repeat:no-repeat;background-position:0 100%;background-size:0% 1px;
  transition:background-size .24s ease;
}
.link-arrow span{transition:transform .16s ease-out}
.link-arrow:hover{background-size:100% 1px}
.link-arrow:hover span{transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq{max-width:900px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 4px;text-align:left;
  font-family:var(--font-serif);font-size:18px;color:var(--ink-900);
}
.faq-ico{position:relative;flex:0 0 20px;height:20px}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;background:var(--ink-700);border-radius:2px;
  transition:transform .22s ease;
}
.faq-ico::before{left:0;top:9.25px;width:20px;height:1.5px}
.faq-ico::after{top:0;left:9.25px;width:1.5px;height:20px}
.faq-item.open .faq-ico::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-item.open .faq-a{max-height:620px}
.faq-a-inner{
  padding:0 16px 26px 16px;border-left:2px solid var(--accent);
  font-size:15.5px;line-height:1.85;color:var(--text-sub);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;
  transition:background .16s ease,transform .16s ease;
}
.btn .arw{transition:transform .16s ease-out}
.btn:hover .arw{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn-solid{background:var(--ink-700);color:#fff}
.btn-solid:hover{background:var(--ink-500)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#C25F24}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--ink-900);color:#fff;padding:88px 0}
.cta-inner{max-width:720px;text-align:center}
.cta-band h2{color:#fff;font-size:clamp(24px,2.8vw,34px)}
.cta-band p{margin-top:16px;color:rgba(255,255,255,.72)}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:76px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.f-brand{
  display:flex;align-items:center;gap:10px;margin-bottom:16px;
  font-family:var(--font-serif);font-size:17px;font-weight:600;color:#fff;
}
.f-brand svg{width:26px;height:26px}
.footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62)}
.footer h4{
  font-family:var(--font-sans);font-size:12px;font-weight:500;
  letter-spacing:.16em;color:rgba(255,255,255,.5);margin-bottom:16px;
}
.footer ul{display:grid;gap:12px}
.footer ul a{font-size:14px;color:rgba(255,255,255,.72);transition:color .16s ease}
.footer ul a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  font-size:12px;color:rgba(255,255,255,.45);
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.in{
  opacity:1;transform:none;
  transition:opacity .6s cubic-bezier(.22,.61,.36,1),transform .6s cubic-bezier(.22,.61,.36,1);
}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){
  .sec{padding:88px 0}
  .cards-3{grid-template-columns:1fr 1fr}
  .split{gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .pagehead{padding:136px 0 72px}
  .sec{padding:68px 0}
  .split{grid-template-columns:1fr;gap:28px}
  .split-text{padding-top:0}
  .num-item{grid-template-columns:1fr;gap:14px;padding:30px 0}
  .num{font-size:24px}
  .num-item:hover{padding-left:0}
  .tl-row{grid-template-columns:1fr;gap:8px}
  .cards-3{grid-template-columns:1fr}
  .card:hover{transform:none}
  .faq-q{font-size:17px;min-height:44px}
  .cta-band{padding:68px 0}
  .footer{padding:60px 0 24px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
}
@media(max-width:520px){
  .pagehead h1{font-size:32px}
  .chips{gap:8px}
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  .card:hover{transform:none}
  .split-media:hover img,.card:hover .card-media img{transform:none}
  .num-item:hover{padding-left:0}
}

/* roulang page: category3 */
:root{
    --ink-900:#0E1A17;
    --ink-700:#14312B;
    --ink-500:#1F4A41;
    --accent:#D96C2C;
    --bg:#F6F5F1;
    --surface:#FFFFFF;
    --line:#E6E4DD;
    --text:#1B211F;
    --text-sub:#5E6864;
    --text-mute:#8C948F;
    --s1:0 1px 2px rgba(15,26,23,.05);
    --s2:0 10px 30px -14px rgba(15,26,23,.18);
    --s3:0 28px 60px -30px rgba(15,26,23,.28);
    --r-pill:999px;
    --r-card:18px;
    --r-img:14px;
    --r-input:12px;
    --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
    --font-sans:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{
    font-family:var(--font-serif);
    color:var(--ink-900);
    margin:0;
    font-weight:600;
    letter-spacing:-0.01em;
  }
  h1{font-size:clamp(34px,5.2vw,62px);line-height:1.16;letter-spacing:-0.02em;}
  h2{font-size:clamp(26px,3vw,38px);line-height:1.25;}
  h3{font-size:21px;line-height:1.4;}
  p{margin:0;}
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  button{font-family:inherit;cursor:pointer;}
  input{font-family:inherit;}
  ::selection{background:rgba(217,108,44,.2);}
  a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--ink-700);
    outline-offset:3px;
    border-radius:6px;
  }

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 20px;
  }
  @media (min-width:768px){.container{padding:0 28px;}}
  @media (min-width:1024px){.container{padding:0 48px;}}

  .eyebrow{
    display:inline-block;
    font-size:11px;
    letter-spacing:.18em;
    text-transform:uppercase;
    color:var(--text-mute);
    margin-bottom:14px;
  }
  .tag{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:12px;
    line-height:1;
    padding:7px 12px;
    border:1px solid var(--line);
    border-radius:var(--r-pill);
    background:#FBFAF7;
    color:var(--ink-700);
  }

  /* ============ 导航 ============ */
  .nav-wrap{
    position:fixed;
    top:16px;
    left:0;
    right:0;
    z-index:120;
    display:flex;
    justify-content:center;
    padding:0 16px;
  }
  .nav-pill{
    position:relative;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    width:min(1120px,100%);
    height:64px;
    padding:0 12px 0 20px;
    border-radius:var(--r-pill);
    border:1px solid transparent;
    background:transparent;
    transition:background .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .nav-wrap.scrolled .nav-pill{
    background:rgba(246,245,241,.72);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-color:var(--line);
    box-shadow:var(--s2);
  }
  .brand{
    display:flex;
    align-items:center;
    gap:9px;
    font-weight:600;
    font-size:17px;
    color:var(--ink-900);
    letter-spacing:-0.01em;
    white-space:nowrap;
  }
  .brand-mark{
    display:inline-flex;
    width:26px;
    height:26px;
    align-items:center;
    justify-content:center;
  }
  .brand-mark svg{width:24px;height:24px;}
  .nav-links{
    display:flex;
    align-items:center;
    gap:2px;
  }
  .nav-links a{
    position:relative;
    padding:9px 14px;
    font-size:15px;
    color:var(--text-sub);
    border-radius:var(--r-pill);
    transition:color .16s ease,background .16s ease;
  }
  .nav-links a:hover{color:var(--ink-700);background:rgba(20,49,43,.05);}
  .nav-links a.active{color:var(--ink-700);font-weight:600;}
  .nav-links a.active::after{
    content:"";
    position:absolute;
    left:50%;
    bottom:3px;
    transform:translateX(-50%);
    width:16px;
    height:2px;
    border-radius:2px;
    background:var(--accent);
  }
  .nav-cta{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    height:44px;
    padding:0 20px;
    border-radius:var(--r-pill);
    background:var(--ink-700);
    color:#fff;
    font-size:14px;
    font-weight:600;
    white-space:nowrap;
    transition:background .16s ease,transform .16s ease;
  }
  .nav-cta:hover{background:var(--ink-500);}
  .nav-cta:active{transform:scale(.985);}
  .nav-burger{
    display:none;
    width:44px;
    height:44px;
    border:1px solid var(--line);
    border-radius:50%;
    background:rgba(255,255,255,.7);
    position:relative;
  }
  .nav-burger span,
  .nav-burger span::before,
  .nav-burger span::after{
    content:"";
    position:absolute;
    left:50%;
    width:16px;
    height:1.5px;
    background:var(--ink-700);
    border-radius:2px;
    transform:translateX(-50%);
    transition:transform .2s ease,opacity .2s ease;
  }
  .nav-burger span{top:50%;margin-top:-1px;}
  .nav-burger span::before{top:-5px;}
  .nav-burger span::after{top:5px;}
  .nav-pill.open .nav-burger span{background:transparent;}
  .nav-pill.open .nav-burger span::before{transform:translateX(-50%) rotate(45deg);top:0;}
  .nav-pill.open .nav-burger span::after{transform:translateX(-50%) rotate(-45deg);top:0;}

  @media (max-width:900px){
    .nav-links{display:none;}
    .nav-burger{display:block;}
    .nav-pill.open{
      background:rgba(246,245,241,.86);
      -webkit-backdrop-filter:blur(14px);
      backdrop-filter:blur(14px);
      border-color:var(--line);
      box-shadow:var(--s2);
    }
    .nav-pill.open .nav-links{
      display:flex;
      flex-direction:column;
      align-items:stretch;
      gap:4px;
      position:absolute;
      top:72px;
      left:0;
      right:0;
      padding:12px;
      background:rgba(255,255,255,.96);
      -webkit-backdrop-filter:blur(14px);
      backdrop-filter:blur(14px);
      border:1px solid var(--line);
      border-radius:20px;
      box-shadow:var(--s2);
    }
    .nav-pill.open .nav-links a{
      padding:13px 16px;
      border-radius:14px;
      font-size:15px;
    }
    .nav-pill.open .nav-links a.active::after{left:16px;transform:none;bottom:8px;}
  }
  @media (max-width:640px){
    .nav-cta{display:none;}
    .brand{font-size:16px;}
  }

  /* ============ 页头 ============ */
  .page-hero{
    position:relative;
    overflow:hidden;
    padding:156px 0 84px;
    background:linear-gradient(180deg,#F1EFE9 0%,#F6F5F1 100%);
    border-bottom:1px solid var(--line);
  }
  .page-hero-bg{
    position:absolute;
    inset:0;
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;
    background-position:center;
    opacity:.16;
    pointer-events:none;
  }
  .page-hero::after{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(246,245,241,.35) 0%,rgba(246,245,241,.92) 100%);
    pointer-events:none;
  }
  .page-hero .container{position:relative;z-index:2;}
  .breadcrumb{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:8px;
    font-size:14px;
    color:var(--text-mute);
    margin-bottom:26px;
  }
  .breadcrumb a{color:var(--text-mute);transition:color .16s ease;}
  .breadcrumb a:hover{color:var(--ink-700);}
  .breadcrumb .sep{color:#C9C6BD;}
  .breadcrumb .current{color:var(--text);}
  .page-hero h1{max-width:15em;}
  .page-hero .lead{
    margin-top:22px;
    max-width:640px;
    font-size:17px;
    color:var(--text-sub);
  }
  .hero-facts{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:32px;
  }
  .hero-facts span{
    font-size:13px;
    color:var(--text-sub);
    border-left:2px solid var(--accent);
    padding-left:12px;
  }

  /* ============ 区块基础 ============ */
  .section{padding:72px 0;}
  @media (min-width:1024px){.section{padding:112px 0;}}
  .section.alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
  .section.tight{padding:64px 0;}
  .section-head{max-width:720px;margin-bottom:48px;}
  .section-head h2{margin-bottom:16px;}
  .section-head p{color:var(--text-sub);font-size:16px;}

  /* ============ 编号条目 ============ */
  .step-list{border-top:1px solid var(--line);}
  .step-row{
    display:grid;
    grid-template-columns:1fr;
    gap:12px;
    padding:28px 4px;
    border-bottom:1px solid var(--line);
    transition:background .16s ease;
  }
  @media (min-width:768px){
    .step-row{grid-template-columns:96px 1fr;gap:32px;padding:34px 8px;}
  }
  .step-row:hover{background:rgba(20,49,43,.025);}
  .step-num{
    font-size:11px;
    letter-spacing:.18em;
    text-transform:uppercase;
    color:var(--text-mute);
    padding-top:6px;
  }
  .step-body h3{margin-bottom:10px;}
  .step-body p{color:var(--text-sub);max-width:62ch;}

  /* ============ 清单 + 图 ============ */
  .check-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:40px;
    align-items:start;
  }
  @media (min-width:1024px){
    .check-grid{grid-template-columns:0.85fr 1.15fr;gap:64px;}
  }
  .figure{
    border-radius:var(--r-img);
    overflow:hidden;
    border:1px solid var(--line);
    box-shadow:var(--s2);
    background:var(--surface);
  }
  .figure img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform .4s cubic-bezier(.22,.61,.36,1);
  }
  .figure:hover img{transform:scale(1.04);}
  .figure figcaption{
    font-size:13px;
    color:var(--text-mute);
    padding:12px 16px;
    border-top:1px solid var(--line);
    background:var(--surface);
  }
  .check-list{list-style:none;margin:0;padding:0;}
  .check-list li{
    display:grid;
    grid-template-columns:46px 1fr;
    gap:16px;
    padding:20px 0;
    border-bottom:1px solid var(--line);
  }
  .check-list li:first-child{border-top:1px solid var(--line);}
  .check-list .idx{
    font-size:12px;
    color:var(--accent);
    font-weight:600;
    letter-spacing:.06em;
    padding-top:3px;
  }
  .check-list h3{font-size:18px;margin-bottom:6px;}
  .check-list p{color:var(--text-sub);font-size:15px;}

  /* ============ 说明卡（宽窄不一） ============ */
  .card-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:24px;
  }
  @media (min-width:900px){
    .card-grid{grid-template-columns:1.55fr 1fr;gap:32px;}
  }
  .info-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:32px;
    box-shadow:var(--s1);
    transition:transform .16s ease-out,box-shadow .16s ease-out,border-color .16s ease-out;
  }
  @media (min-width:768px){.info-card{padding:40px;}}
  .info-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--s2);
    border-color:rgba(20,49,43,.2);
  }
  .info-card h3{margin:16px 0 12px;}
  .info-card p{color:var(--text-sub);font-size:15px;}
  .info-card ul{
    margin:18px 0 0;
    padding:0;
    list-style:none;
  }
  .info-card li{
    position:relative;
    padding-left:18px;
    font-size:15px;
    color:var(--text-sub);
    margin-bottom:10px;
  }
  .info-card li::before{
    content:"";
    position:absolute;
    left:0;
    top:11px;
    width:8px;
    height:1.5px;
    background:var(--accent);
  }
  .dark-card{
    background:var(--ink-700);
    border-color:var(--ink-700);
    color:#E9EEEC;
  }
  .dark-card h3,.dark-card h2{color:#fff;}
  .dark-card p{color:rgba(233,238,236,.76);}
  .dark-card .tag{background:transparent;border-color:rgba(255,255,255,.28);color:#E9EEEC;}

  /* ============ FAQ ============ */
  .faq-list{
    max-width:860px;
    border-top:1px solid var(--line);
  }
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:22px 4px;
    min-height:44px;
    background:transparent;
    border:0;
    text-align:left;
    font-size:17px;
    font-weight:600;
    font-family:var(--font-serif);
    color:var(--ink-900);
    transition:color .16s ease;
  }
  .faq-q:hover{color:var(--ink-500);}
  .faq-icon{position:relative;width:16px;height:16px;flex:none;}
  .faq-icon::before,.faq-icon::after{
    content:"";
    position:absolute;
    left:50%;
    top:50%;
    background:var(--ink-700);
    border-radius:2px;
    transition:transform .22s ease,opacity .22s ease;
  }
  .faq-icon::before{width:14px;height:1.5px;transform:translate(-50%,-50%);}
  .faq-icon::after{width:1.5px;height:14px;transform:translate(-50%,-50%);}
  .faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .22s ease;
  }
  .faq-a-inner{
    padding:2px 16px 24px 20px;
    border-left:2px solid transparent;
  }
  .faq-item.open .faq-a-inner{border-left-color:var(--accent);}
  .faq-a-inner p{color:var(--text-sub);font-size:15px;}

  /* ============ CTA 条 ============ */
  .cta-band{
    background:var(--ink-900);
    color:#fff;
    padding:72px 0;
  }
  .cta-band .inner{
    max-width:660px;
    margin:0 auto;
    text-align:center;
  }
  .cta-band h2{color:#fff;margin-bottom:16px;}
  .cta-band p{color:rgba(255,255,255,.72);font-size:16px;margin-bottom:32px;}
  .btn-primary{
    display:inline-flex;
    align-items:center;
    gap:10px;
    height:50px;
    padding:0 26px;
    border-radius:var(--r-pill);
    background:var(--accent);
    color:#fff;
    font-size:15px;
    font-weight:600;
    transition:background .16s ease,transform .16s ease;
  }
  .btn-primary svg{transition:transform .16s ease;}
  .btn-primary:hover{background:#C25E23;}
  .btn-primary:hover svg{transform:translateX(4px);}
  .btn-primary:active{transform:scale(.985);}
  .btn-ghost{
    display:inline-flex;
    align-items:center;
    gap:8px;
    height:50px;
    padding:0 24px;
    border-radius:var(--r-pill);
    border:1px solid rgba(255,255,255,.3);
    color:#fff;
    font-size:15px;
    font-weight:600;
    transition:border-color .16s ease,background .16s ease;
  }
  .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);}
  .cta-actions{
    display:flex;
    flex-wrap:wrap;
    gap:14px;
    justify-content:center;
  }
  .link-arrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:15px;
    font-weight:600;
    color:var(--ink-700);
    position:relative;
  }
  .link-arrow::after{
    content:"";
    position:absolute;
    left:0;
    bottom:-3px;
    height:1px;
    width:0;
    background:var(--accent);
    transition:width .24s ease;
  }
  .link-arrow:hover::after{width:100%;}
  .link-arrow:hover svg{transform:translateX(4px);}
  .link-arrow svg{transition:transform .16s ease;}

  /* ============ 页脚 ============ */
  .footer{
    background:var(--ink-900);
    color:rgba(255,255,255,.72);
    padding:72px 0 28px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:40px;
  }
  @media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;}}
  .f-brand{
    display:flex;
    align-items:center;
    gap:10px;
    color:#fff;
    font-weight:600;
    font-size:17px;
    margin-bottom:16px;
  }
  .f-brand svg{width:24px;height:24px;}
  .footer p{font-size:14px;line-height:1.8;max-width:34ch;}
  .footer h4{
    font-family:var(--font-sans);
    font-size:12px;
    letter-spacing:.18em;
    text-transform:uppercase;
    color:rgba(255,255,255,.5);
    margin-bottom:18px;
    font-weight:600;
  }
  .footer ul{list-style:none;margin:0;padding:0;}
  .footer li{margin-bottom:12px;}
  .footer li a{
    font-size:14px;
    color:rgba(255,255,255,.72);
    transition:color .16s ease;
    border-bottom:1px solid transparent;
  }
  .footer li a:hover{color:#fff;border-bottom-color:rgba(255,255,255,.6);}
  .footer-bottom{
    margin-top:56px;
    padding-top:22px;
    border-top:1px solid rgba(255,255,255,.12);
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    justify-content:space-between;
    font-size:12px;
    color:rgba(255,255,255,.42);
  }

  /* ============ 入场动效 ============ */
  .reveal{
    opacity:0;
    transform:translateY(16px);
    transition:opacity .6s cubic-bezier(.22,.61,.36,1),transform .6s cubic-bezier(.22,.61,.36,1);
  }
  .reveal.is-visible{opacity:1;transform:none;}

  @media (max-width:640px){
    .page-hero{padding:132px 0 64px;}
    .section{padding:64px 0;}
    .info-card{padding:26px;}
    .faq-q{font-size:16px;}
    .cta-band{padding:60px 0;}
  }

  @media (prefers-reduced-motion:reduce){
    *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
    .reveal{opacity:1;transform:none;}
    .info-card:hover{transform:none;}
    .figure:hover img{transform:none;}
  }

/* roulang page: category4 */
:root{
  --ink-900:#0E1A17;
  --ink-700:#14312B;
  --ink-500:#1F4A41;
  --accent:#D96C2C;
  --bg:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E6E4DD;
  --text:#1B211F;
  --text-sub:#5E6864;
  --text-mute:#8C948F;
  --s1:0 1px 2px rgba(15,26,23,.05);
  --s2:0 10px 30px -14px rgba(15,26,23,.18);
  --s3:0 28px 60px -30px rgba(15,26,23,.28);
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;font-weight:600;color:var(--text);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s ease;}
img{max-width:100%;display:block;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;}
:focus-visible{outline:2px solid var(--ink-700);outline-offset:3px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 48px;}
.narrow{max-width:960px;}

/* ============ 导航 ============ */
.nav-wrap{position:fixed;top:16px;left:0;right:0;z-index:60;display:flex;justify-content:center;padding:0 20px;}
.nav-pill{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:min(1120px,92vw);min-height:64px;
  padding:8px 10px 8px 20px;
  border:1px solid transparent;border-radius:999px;
  transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.nav-wrap.scrolled .nav-pill{
  background:rgba(246,245,241,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-color:var(--line);
  box-shadow:var(--s2);
}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:16px;font-weight:600;letter-spacing:.01em;color:var(--ink-900);min-height:44px;}
.brand-mark{width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;}
.brand-mark svg{width:26px;height:26px;}
.nav-links{display:flex;align-items:center;gap:2px;}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;min-height:44px;
  padding:0 14px;font-size:14px;color:var(--text-sub);border-radius:999px;
}
.nav-links a:hover{color:var(--ink-700);background:rgba(20,49,43,.05);}
.nav-links a.active{color:var(--ink-900);font-weight:500;}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;bottom:6px;transform:translateX(-50%);
  width:16px;height:2px;border-radius:2px;background:var(--accent);
}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;min-height:44px;
  padding:0 20px;border-radius:999px;background:var(--ink-700);color:#fff;
  font-size:14px;letter-spacing:.02em;transition:background .2s ease,transform .2s ease;
}
.nav-cta:hover{background:var(--ink-500);}
.nav-cta:active{transform:scale(.99);}
.nav-burger{display:none;width:44px;height:44px;border-radius:999px;align-items:center;justify-content:center;border:1px solid var(--line);background:rgba(255,255,255,.6);}
.nav-burger span{position:relative;display:block;width:16px;height:1.5px;background:var(--ink-900);border-radius:2px;}
.nav-burger span::before,.nav-burger span::after{content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink-900);border-radius:2px;}
.nav-burger span::before{top:-5px;}
.nav-burger span::after{top:5px;}

/* ============ 通用板块与标题 ============ */
.section{padding:112px 0;}
.sec-head{max-width:720px;margin-bottom:48px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{display:block;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-mute);margin-bottom:14px;}
.sec-head h2{font-size:clamp(26px,3vw,38px);line-height:1.24;letter-spacing:-.01em;}
.sec-sub{margin-top:16px;color:var(--text-sub);font-size:16px;max-width:640px;}
.sec-head.center .sec-sub{margin-left:auto;margin-right:auto;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  border:1px solid rgba(20,49,43,.18);background:rgba(20,49,43,.05);
  color:var(--ink-700);font-size:12px;letter-spacing:.02em;
}
.btn{
  display:inline-flex;align-items:center;gap:8px;min-height:48px;padding:0 26px;
  border-radius:999px;font-size:15px;transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-solid{background:var(--ink-700);color:#fff;box-shadow:var(--s2);}
.btn-solid:hover{background:var(--ink-500);}
.btn-solid:hover .arrow{transform:translateX(4px);}
.btn-solid:active{transform:scale(.99);}
.btn-ghost{border:1px solid rgba(255,255,255,.28);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.1);}
.arrow{display:inline-block;transition:transform .2s ease;}
.textlink{
  position:relative;display:inline-flex;align-items:center;gap:6px;min-height:44px;
  font-size:15px;color:var(--ink-700);font-weight:500;
}
.textlink::after{
  content:"";position:absolute;left:0;bottom:8px;height:1px;width:0;background:var(--ink-700);
  transition:width .24s ease;
}
.textlink:hover::after{width:100%;}
.textlink:hover .arrow{transform:translateX(4px);}

/* ============ 页头区 ============ */
.page-head{padding:120px 0 80px;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-mute);margin-bottom:32px;}
.crumbs a:hover{color:var(--ink-700);}
.crumbs span.sep{color:var(--line);}
.crumbs .current{color:var(--text);}
.ph-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.page-head h1{
  font-size:clamp(34px,5.2vw,62px);line-height:1.16;letter-spacing:-.02em;font-weight:600;
}
.ph-lead{margin-top:22px;font-size:17px;line-height:1.85;color:var(--text-sub);max-width:560px;}
.ph-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.ph-actions{display:flex;flex-wrap:wrap;align-items:center;gap:28px;margin-top:34px;}
.ph-media{position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--s3);}
.ph-media img{width:100%;height:340px;object-fit:cover;border-radius:var(--r-card);transition:transform .5s ease;}
.ph-media:hover img{transform:scale(1.04);}
.ph-media::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-card);
  border:1px solid rgba(255,255,255,.24);pointer-events:none;
}

/* ============ 要点区（横向四列） ============ */
.points{padding:96px 0 108px;}
.point-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.point-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 24px 26px;box-shadow:var(--s1);
  transition:transform .16s ease-out,box-shadow .16s ease-out,border-color .16s ease-out;
}
.point-card:hover{transform:translateY(-4px);box-shadow:var(--s2);border-color:rgba(20,49,43,.2);}
.p-num{display:block;font-family:"Noto Serif SC",serif;font-size:28px;color:var(--accent);letter-spacing:.02em;line-height:1;}
.point-card h3{font-size:19px;margin-top:18px;line-height:1.4;}
.point-card p{margin-top:12px;font-size:14.5px;color:var(--text-sub);}
.mini-list{margin-top:16px;border-top:1px solid var(--line);padding-top:14px;}
.mini-list li{position:relative;padding-left:14px;font-size:13.5px;color:var(--text-mute);line-height:1.9;}
.mini-list li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:1px;background:var(--text-mute);}

/* ============ 核对顺序清单 ============ */
.checklist{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.step-list{margin-top:8px;}
.step-list li{
  display:grid;grid-template-columns:64px 1fr;gap:24px;align-items:start;
  padding:30px 0;border-bottom:1px solid var(--line);
}
.step-list li:first-child{border-top:1px solid var(--line);}
.step-idx{font-family:"Noto Serif SC",serif;font-size:22px;color:var(--text-mute);line-height:1.6;}
.step-list h3{font-size:20px;}
.step-list p{margin-top:10px;color:var(--text-sub);font-size:15px;max-width:640px;}
.step-note{display:inline-flex;margin-top:14px;}

/* ============ 深色说明区 ============ */
.dark-sec{background:var(--ink-900);color:#fff;padding:112px 0;}
.dark-sec h2{color:#fff;}
.dark-sec .eyebrow{color:rgba(255,255,255,.5);}
.dark-sec .sec-sub{color:rgba(255,255,255,.68);}
.dark-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;align-items:start;}
.dark-lead{
  border-left:2px solid var(--accent);padding-left:22px;
  font-size:19px;line-height:1.8;color:rgba(255,255,255,.9);
}
.dark-card{
  border:1px solid rgba(255,255,255,.14);border-radius:var(--r-card);padding:26px 22px;
  background:rgba(255,255,255,.03);
  transition:border-color .2s ease,background .2s ease;
}
.dark-card:hover{border-color:rgba(217,108,44,.55);background:rgba(255,255,255,.06);}
.dark-card h3{color:#fff;font-size:18px;}
.dark-card p{margin-top:12px;font-size:14.5px;color:rgba(255,255,255,.66);}
.dark-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:64px;padding-top:44px;border-top:1px solid rgba(255,255,255,.12);}
.stat-num{font-family:"Noto Serif SC",serif;font-size:34px;color:var(--accent);line-height:1;}
.stat-txt{margin-top:12px;font-size:14px;color:rgba(255,255,255,.62);}

/* ============ FAQ ============ */
.faq-sec{padding:112px 0 96px;}
.faq-list{max-width:860px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%;
  padding:26px 0;text-align:left;font-family:"Noto Serif SC","Songti SC",serif;
  font-size:19px;font-weight:600;line-height:1.5;color:var(--text);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--ink-700);}
.faq-icon{position:relative;flex:0 0 auto;width:18px;height:18px;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:0;top:8px;width:18px;height:1.5px;background:var(--ink-700);border-radius:2px;
  transition:transform .22s ease,opacity .22s ease;
}
.faq-icon::after{transform:rotate(90deg);}
.faq-item.open .faq-icon::after{transform:rotate(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease;}
.faq-a-inner{padding:0 16px 28px 16px;border-left:2px solid transparent;transition:border-color .22s ease;}
.faq-item.open .faq-a-inner{border-left-color:var(--accent);}
.faq-a-inner p{font-size:15.5px;color:var(--text-sub);line-height:1.9;max-width:700px;}

/* ============ CTA 条 ============ */
.cta-sec{padding:0 0 112px;}
.cta-bar{
  background:var(--ink-900);border-radius:26px;padding:64px 56px;text-align:center;
  box-shadow:var(--s3);
}
.cta-bar h2{color:#fff;font-size:clamp(24px,2.6vw,32px);}
.cta-bar p{margin:18px auto 0;max-width:560px;color:rgba(255,255,255,.68);font-size:15.5px;}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:18px;margin-top:32px;}

/* ============ 页脚 ============ */
.footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:80px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.f-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:600;font-family:"Noto Serif SC","Songti SC",serif;}
.f-brand svg{width:24px;height:24px;}
.footer-grid p{margin-top:18px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:300px;}
.footer h4{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.45);font-family:Inter,sans-serif;font-weight:500;}
.footer ul{margin-top:20px;}
.footer ul li{margin-bottom:12px;}
.footer ul li a{font-size:14px;color:rgba(255,255,255,.72);}
.footer ul li a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  margin-top:64px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  font-size:12px;color:rgba(255,255,255,.42);
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .container{padding:0 28px;}
  .ph-grid{grid-template-columns:1fr;gap:40px;}
  .ph-media img{height:280px;}
  .point-grid{grid-template-columns:repeat(2,1fr);}
  .dark-grid{grid-template-columns:1fr 1fr;}
  .dark-lead{grid-column:1 / -1;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media (max-width:768px){
  .nav-links{
    display:none;position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;padding:12px;
    background:rgba(246,245,241,.94);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border:1px solid var(--line);border-radius:22px;box-shadow:var(--s2);
  }
  .nav-wrap.open .nav-links{display:flex;}
  .nav-links a{padding:0 16px;font-size:15px;}
  .nav-links a.active::after{left:16px;transform:none;}
  .nav-cta{display:none;}
  .nav-burger{display:inline-flex;}
  .section{padding:72px 0;}
  .page-head{padding:104px 0 60px;}
  .points{padding:64px 0 72px;}
  .dark-sec,.faq-sec{padding:72px 0;}
  .point-grid{grid-template-columns:1fr;gap:18px;}
  .point-card:hover{transform:none;}
  .step-list li{grid-template-columns:1fr;gap:10px;padding:26px 0;}
  .dark-grid{grid-template-columns:1fr;gap:20px;}
  .dark-stats{grid-template-columns:1fr;gap:20px;margin-top:44px;padding-top:32px;}
  .cta-sec{padding:0 0 72px;}
  .cta-bar{padding:44px 24px;border-radius:20px;}
  .faq-q{font-size:17px;padding:22px 0;}
  .footer{padding:64px 0 24px;}
}
@media (max-width:520px){
  .container{padding:0 20px;}
  .ph-media img{height:220px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .point-card:hover{transform:none;}
  .ph-media:hover img{transform:none;}
}