/* roulang page: index */
:root{
  --c-ink:#16191D;
  --c-ink-soft:#3A4049;
  --c-cloud:#FAF9F6;
  --c-surface:#FFFFFF;
  --c-line:#E6E3DD;
  --c-accent:#E1542B;
  --c-accent-soft:#FDF0EA;
  --c-jade:#2E6F65;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-badge:999px;
  --sh-1:0 1px 2px rgba(22,25,29,.04);
  --sh-2:0 14px 36px -14px rgba(22,25,29,.16);
  --ease:cubic-bezier(.22,1,.36,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC","SimSun",serif;
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-ink);
  background:var(--c-cloud);
  overflow-x:hidden;
}
img{max-width:100%;display:block;object-fit:cover;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;letter-spacing:-0.02em;line-height:1.18;}
h1,h2{font-family:var(--font-serif);font-weight:700;}
h3,h4{font-weight:600;}
p{margin:0;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container{padding:0 32px;}}
@media (min-width:1280px){.container{padding:0 48px;max-width:1280px;}}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(250,249,246,.94);
  transition:box-shadow .28s var(--ease),border-color .28s var(--ease),background .28s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  border-bottom-color:var(--c-line);
  box-shadow:0 1px 2px rgba(22,25,29,.05);
  backdrop-filter:blur(10px);
}
.nav-bar{
  display:flex;align-items:center;justify-content:space-between;
  height:var(--nav-h);
}
@media (min-width:1024px){.nav-bar{height:76px;}}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{width:34px;height:34px;flex:none;}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text b{font-size:17px;font-weight:700;letter-spacing:-0.01em;}
.brand-text small{font-size:11px;color:var(--c-ink-soft);letter-spacing:.16em;}
.nav-links{display:none;align-items:center;gap:30px;}
@media (min-width:1024px){.nav-links{display:flex;}}
.nav-link{
  position:relative;font-size:15px;color:var(--c-ink-soft);
  padding:6px 0;transition:color .22s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;
  background:var(--c-accent);transform:translateX(-50%);
  transition:width .26s var(--ease);
}
.nav-link:hover{color:var(--c-ink);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{color:var(--c-ink);font-weight:600;}
.nav-link.is-active::after{width:60%;}
.nav-cta{display:none;}
@media (min-width:1024px){.nav-cta{display:inline-flex;}}
.nav-toggle{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 10px;border:1px solid var(--c-line);
  border-radius:var(--r-btn);background:transparent;cursor:pointer;
  transition:border-color .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--c-ink);}
.nav-toggle span{display:block;height:2px;width:100%;background:var(--c-ink);border-radius:2px;}
@media (min-width:1024px){.nav-toggle{display:none;}}

.mobile-menu{
  position:fixed;inset:0;z-index:120;background:rgba(250,249,246,.97);
  display:flex;flex-direction:column;padding:24px 24px 40px;
  transform:translateY(-12px);opacity:0;pointer-events:none;
  transition:opacity .28s var(--ease),transform .28s var(--ease);
}
.mobile-menu.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
.mobile-menu-head{display:flex;align-items:center;justify-content:space-between;}
.mobile-close{
  width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:transparent;cursor:pointer;font-size:22px;line-height:1;
}
.mobile-close:hover{border-color:var(--c-ink);}
.mobile-nav{margin-top:44px;display:flex;flex-direction:column;}
.mobile-nav a{
  font-family:var(--font-serif);font-size:24px;font-weight:700;
  padding:18px 0;border-bottom:1px solid var(--c-line);
  opacity:0;transform:translateY(8px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),color .2s var(--ease);
}
.mobile-menu.is-open .mobile-nav a{opacity:1;transform:translateY(0);}
.mobile-nav a:hover{color:var(--c-accent);}
.mobile-menu-foot{margin-top:auto;padding-top:32px;color:var(--c-ink-soft);font-size:13px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  border:1px solid transparent;transition:all .22s var(--ease);
}
.btn-primary{background:var(--c-ink);color:var(--c-cloud);}
.btn-primary:hover{background:var(--c-accent);transform:translateY(-1px);}
.btn-primary:disabled{opacity:.55;cursor:not-allowed;transform:none;}
.btn-outline{background:transparent;color:var(--c-ink);border-color:var(--c-ink);}
.btn-outline:hover{background:var(--c-ink);color:var(--c-cloud);transform:translateY(-1px);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.45);}
.btn-ghost-light:hover{background:#fff;color:var(--c-ink);border-color:#fff;transform:translateY(-1px);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--c-jade);
  font-weight:600;font-size:15px;position:relative;padding-bottom:2px;
}
.btn-text::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:1px;
  background:var(--c-jade);transition:width .26s var(--ease);
}
.btn-text:hover::after{width:100%;}

/* ---------- Hero ---------- */
.hero{
  position:relative;margin-top:var(--nav-h);
  background:var(--c-ink);color:#fff;overflow:hidden;
  padding:64px 0 0;
}
@media (min-width:1024px){.hero{margin-top:76px;padding:96px 0 0;}}
.hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.32;
}
.hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(22,25,29,.96) 0%,rgba(22,25,29,.82) 46%,rgba(22,25,29,.55) 100%);
}
.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1fr;gap:44px;
}
@media (min-width:1024px){
  .hero-inner{grid-template-columns:minmax(0,6.2fr) minmax(0,5.8fr);gap:56px;align-items:center;}
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;letter-spacing:.12em;color:rgba(255,255,255,.78);
  border:1px solid rgba(255,255,255,.2);border-radius:var(--r-badge);
  padding:7px 16px;margin-bottom:24px;
}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--c-accent);flex:none;}
.hero h1{
  font-size:clamp(34px,5vw,62px);
  font-weight:800;line-height:1.14;letter-spacing:-0.02em;
  color:#fff;
}
.hero h1 em{font-style:normal;color:var(--c-accent);}
.hero-sub{
  margin-top:22px;font-size:17px;line-height:1.8;
  color:rgba(255,255,255,.76);max-width:520px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero-trust{
  display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:34px;
  padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
}
.hero-trust li{
  font-size:13px;color:rgba(255,255,255,.66);
  display:flex;align-items:center;gap:8px;
}
.hero-trust li::before{
  content:"";width:5px;height:5px;border-radius:50%;
  background:var(--c-jade);flex:none;
}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:16/11;border-radius:var(--r-img);
  border:1px solid rgba(255,255,255,.16);
}
.hero-visual-tag{
  position:absolute;left:16px;bottom:16px;
  background:rgba(22,25,29,.82);border:1px solid rgba(255,255,255,.18);
  border-radius:var(--r-badge);padding:8px 16px;
  font-size:12px;letter-spacing:.14em;color:rgba(255,255,255,.86);
}
.hero-stats{
  position:relative;z-index:2;margin-top:64px;
  border-top:1px solid rgba(255,255,255,.14);
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
}
@media (min-width:768px){.hero-stats{grid-template-columns:repeat(4,minmax(0,1fr));}}
.hero-stats > div{
  padding:26px 18px 34px;border-bottom:1px solid rgba(255,255,255,.1);
}
@media (min-width:768px){
  .hero-stats > div{border-bottom:0;border-right:1px solid rgba(255,255,255,.1);}
  .hero-stats > div:last-child{border-right:0;}
}
.hero-stats strong{
  display:block;font-family:var(--font-serif);
  font-size:clamp(28px,3.4vw,42px);font-weight:700;
  color:#fff;line-height:1.1;
}
.hero-stats span{display:block;margin-top:8px;font-size:13px;color:rgba(255,255,255,.6);}

/* ---------- 通用板块 ---------- */
.section{padding:64px 0;}
@media (min-width:768px){.section{padding:96px 0;}}
@media (min-width:1024px){.section{padding:120px 0;}}
.section-head{max-width:760px;}
.section-line{
  display:block;width:36px;height:2px;background:var(--c-accent);
  border-radius:2px;margin-bottom:20px;
}
.section-head h2{
  font-size:clamp(26px,3vw,34px);font-weight:700;color:var(--c-ink);
}
.section-head .section-sub{
  margin-top:16px;font-size:16px;line-height:1.85;color:var(--c-ink-soft);
}
.section-body{margin-top:44px;}
@media (min-width:1024px){.section-body{margin-top:56px;}}
.section--alt{background:var(--c-surface);}
.section--ink{background:var(--c-ink);color:#fff;}

/* ---------- 编号索引列表 ---------- */
.index-list{border-top:1px solid var(--c-line);}
.index-item{
  display:grid;grid-template-columns:auto 1fr auto;
  align-items:center;gap:18px;
  padding:26px 0;border-bottom:1px solid var(--c-line);
  transition:transform .26s var(--ease);
}
@media (min-width:768px){
  .index-item{gap:36px;padding:32px 0;}
}
.index-item:hover{transform:translateX(4px);}
.index-num{
  font-family:var(--font-serif);font-size:clamp(24px,3vw,34px);
  font-weight:700;color:var(--c-accent);line-height:1;
  transition:color .26s var(--ease);min-width:52px;
}
.index-item:hover .index-num{color:var(--c-ink);}
.index-title{font-size:18px;font-weight:600;color:var(--c-ink);}
.index-desc{margin-top:8px;font-size:14px;line-height:1.75;color:var(--c-ink-soft);}
.index-arrow{
  width:34px;height:34px;border-radius:50%;flex:none;
  border:1px solid var(--c-line);display:flex;align-items:center;justify-content:center;
  color:var(--c-ink-soft);font-size:15px;
  transition:all .26s var(--ease);
}
.index-item:hover .index-arrow{
  border-color:var(--c-ink);background:var(--c-ink);color:#fff;
}

/* ---------- 数据条 ---------- */
.stat-row{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  border-top:1px solid var(--c-line);border-left:1px solid var(--c-line);
}
@media (min-width:900px){.stat-row{grid-template-columns:repeat(4,minmax(0,1fr));}}
.stat-cell{
  padding:30px 22px;border-right:1px solid var(--c-line);border-bottom:1px solid var(--c-line);
}
.stat-cell strong{
  display:block;font-family:var(--font-serif);
  font-size:clamp(30px,3.6vw,46px);font-weight:700;color:var(--c-jade);line-height:1.1;
}
.stat-cell span{display:block;margin-top:10px;font-size:13px;color:var(--c-ink-soft);line-height:1.7;}

/* ---------- 图文交错 ---------- */
.split{
  display:grid;grid-template-columns:1fr;gap:30px;align-items:center;
}
@media (min-width:1024px){.split{grid-template-columns:1fr 1fr;gap:64px;}}
.split + .split{margin-top:56px;}
@media (min-width:1024px){.split + .split{margin-top:88px;}}
.split-media img{
  width:100%;aspect-ratio:16/10;border-radius:var(--r-img);
  border:1px solid var(--c-line);
}
@media (min-width:1024px){
  .split--reverse .split-media{order:2;}
}
.split-tag{
  display:inline-block;font-size:12px;letter-spacing:.14em;
  color:var(--c-accent);background:var(--c-accent-soft);
  border-radius:var(--r-badge);padding:6px 14px;margin-bottom:18px;
}
.split-body h3{font-size:clamp(21px,2.3vw,26px);color:var(--c-ink);font-family:var(--font-serif);font-weight:700;}
.split-body p{margin-top:16px;font-size:16px;line-height:1.85;color:var(--c-ink-soft);}
.check-list{margin-top:22px;border-top:1px solid var(--c-line);}
.check-list li{
  padding:13px 0 13px 24px;position:relative;
  font-size:15px;color:var(--c-ink-soft);border-bottom:1px solid var(--c-line);
}
.check-list li::before{
  content:"";position:absolute;left:2px;top:22px;
  width:9px;height:1px;background:var(--c-accent);
}
.split-link{margin-top:24px;display:inline-flex;}

/* ---------- 案例非对称栅格 ---------- */
.case-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media (min-width:900px){
  .case-grid{grid-template-columns:repeat(12,minmax(0,1fr));}
  .case-card--lead{grid-column:span 7;}
  .case-card--side{grid-column:span 5;}
  .case-card--side:last-child{grid-column:span 5 / 13;}
}
.case-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.case-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(22,25,29,.2);}
.case-card img{width:100%;aspect-ratio:16/10;transition:transform .4s var(--ease);}
.case-card:hover img{transform:scale(1.02);}
.case-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.badge{
  align-self:flex-start;font-size:12px;letter-spacing:.08em;
  background:var(--c-accent-soft);color:var(--c-accent);
  border-radius:var(--r-badge);padding:5px 12px;
}
.case-body h3{font-size:18px;color:var(--c-ink);}
.case-body p{font-size:14px;line-height:1.8;color:var(--c-ink-soft);}
.case-meta{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-ink-soft);
}

/* ---------- 最新信息（CMS） ---------- */
.cms-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;padding-bottom:22px;border-bottom:1px solid var(--c-line);
}
.cms-grid{
  display:grid;grid-template-columns:1fr;gap:24px;margin-top:36px;
}
@media (min-width:700px){.cms-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.cms-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.post-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(22,25,29,.2);}
.post-thumb{width:100%;aspect-ratio:16/10;overflow:hidden;background:var(--c-accent-soft);}
.post-thumb img{width:100%;height:100%;transition:transform .4s var(--ease);}
.post-card:hover .post-thumb img{transform:scale(1.02);}
.post-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.post-body h3{
  font-size:17px;line-height:1.6;color:var(--c-ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;overflow-wrap:anywhere;
}
.post-body p{
  font-size:14px;line-height:1.78;color:var(--c-ink-soft);min-height:50px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;overflow-wrap:anywhere;
}
.post-foot{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-ink-soft);
}
.post-foot .arrow{transition:transform .26s var(--ease);}
.post-card:hover .post-foot .arrow{transform:translateX(4px);}
.cms-empty{
  margin-top:36px;padding:72px 24px;text-align:center;
  border:1px dashed var(--c-line);border-radius:var(--r-card);
  background:var(--c-accent-soft);
}
.cms-empty p{font-size:15px;color:var(--c-ink-soft);}
.cms-empty .btn-text{margin-top:16px;}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:1024px){.faq-layout{grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:64px;align-items:start;}}
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);transition:border-color .26s var(--ease);}
.faq-item[open]{border-color:var(--c-ink);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:17px;font-weight:600;color:var(--c-ink);
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--c-accent);}
.faq-icon{
  position:relative;width:20px;height:20px;flex:none;
  transition:transform .3s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:0;
  width:100%;height:1px;background:var(--c-ink-soft);
}
.faq-icon::after{transform:rotate(90deg);}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-item[open] .faq-icon::before,.faq-item[open] .faq-icon::after{background:var(--c-accent);}
.faq-answer{padding:0 0 24px;font-size:15px;line-height:1.9;color:var(--c-ink-soft);max-width:720px;}

/* ---------- 联系 / CTA ---------- */
.contact{background:var(--c-ink);color:#fff;}
.contact-layout{display:grid;grid-template-columns:1fr;gap:36px;}
@media (min-width:1024px){.contact-layout{grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:72px;align-items:start;}}
.contact h2{font-size:clamp(26px,3vw,34px);color:#fff;}
.contact .lead{margin-top:18px;font-size:16px;line-height:1.9;color:rgba(255,255,255,.72);}
.contact-points{margin-top:32px;border-top:1px solid rgba(255,255,255,.14);}
.contact-points li{
  padding:16px 0;border-bottom:1px solid rgba(255,255,255,.12);
  font-size:14px;color:rgba(255,255,255,.78);
  display:flex;align-items:center;gap:12px;
}
.contact-points li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent);flex:none;
}
.form-card{
  background:var(--c-surface);border-radius:var(--r-card);
  padding:28px 24px;color:var(--c-ink);
}
@media (min-width:768px){.form-card{padding:36px 34px;}}
.form-card h3{font-size:20px;color:var(--c-ink);}
.form-card .form-note{margin-top:10px;font-size:13px;color:var(--c-ink-soft);}
.form-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:24px;}
@media (min-width:640px){.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:13px;font-weight:600;color:var(--c-ink-soft);}
.field input,.field textarea{
  width:100%;padding:12px 14px;border-radius:var(--r-btn);
  border:1px solid var(--c-line);background:#fff;
  font-size:15px;line-height:1.6;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.field textarea{resize:vertical;min-height:112px;}
.field input::placeholder,.field textarea::placeholder{color:#A8A49C;}
.field input:hover,.field textarea:hover{border-color:rgba(22,25,29,.35);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--c-ink);
  box-shadow:0 0 0 2px rgba(22,25,29,.14);
}
.form-submit{margin-top:24px;display:flex;flex-wrap:wrap;align-items:center;gap:16px;}
.form-submit .btn{min-width:160px;}
.form-tip{font-size:12px;color:var(--c-ink-soft);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.68);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px;}
@media (min-width:700px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1.2fr;gap:44px;}}
.footer-brand b{display:block;font-size:17px;color:#fff;font-weight:700;}
.footer-brand small{display:block;font-size:11px;letter-spacing:.16em;color:rgba(255,255,255,.5);margin-top:4px;}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.85;max-width:320px;}
.footer-col h4{font-size:14px;color:#fff;font-weight:600;letter-spacing:.04em;margin-bottom:16px;}
.footer-col ul li{margin-bottom:11px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66);position:relative;transition:color .22s var(--ease);}
.footer-col a:hover{color:var(--c-accent);}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.5);}
.footer-bottom a:hover{color:var(--c-accent);}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-in{
  opacity:1;transform:translateY(0);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
  transition-delay:var(--d,0ms);
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
  .reveal.is-in{transition:none;}
  .case-card,.post-card,.index-item,.btn{transition:none;}
  .case-card:hover,.post-card:hover{transform:none;}
  .case-card:hover img,.post-card:hover .post-thumb img{transform:none;}
  .index-item:hover{transform:none;}
}

/* roulang page: article */
:root{
  --c-ink:#16191D;
  --c-ink-soft:#3A4049;
  --c-cloud:#FAF9F6;
  --c-surface:#FFFFFF;
  --c-line:#E6E3DD;
  --c-accent:#E1542B;
  --c-accent-soft:#FDF0EA;
  --c-jade:#2E6F65;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(22,25,29,.04);
  --sh-2:0 14px 36px -14px rgba(22,25,29,.16);
  --ease:cubic-bezier(.22,1,.36,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC",serif;
}

*,*::before,*::after{ box-sizing:border-box; }

html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--c-cloud);
  color:var(--c-ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  overflow-x:hidden;
}

body.menu-open{ overflow:hidden; }

img{ max-width:100%; display:block; }

a{ color:inherit; text-decoration:none; }

button,input,textarea,select{ font:inherit; color:inherit; }

:focus-visible{
  outline:2px solid var(--c-accent);
  outline-offset:3px;
  border-radius:4px;
}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}

@media (min-width:768px){ .container{ padding:0 32px; } }
@media (min-width:1280px){ .container{ padding:0 48px; } }

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(250,249,246,.96);
  border-bottom:1px solid transparent;
  transition:border-color .28s var(--ease), box-shadow .28s var(--ease), background .28s var(--ease);
}

.site-header.is-scrolled{
  border-bottom-color:var(--c-line);
  box-shadow:0 1px 2px rgba(22,25,29,.04);
  backdrop-filter:blur(6px);
  background:rgba(250,249,246,.94);
}

.header-inner{
  min-height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}

@media (min-width:1024px){ .header-inner{ min-height:76px; } }

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}

.brand-mark{ width:34px; height:34px; flex-shrink:0; }

.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text b{ font-size:17px; font-weight:800; letter-spacing:-.02em; }
.brand-text small{ font-size:11px; color:var(--c-ink-soft); letter-spacing:.14em; }

.nav-links{
  display:none;
  align-items:center;
  gap:6px;
}

@media (min-width:1024px){ .nav-links{ display:flex; } }

.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  font-size:15px;
  color:var(--c-ink-soft);
  transition:color .22s var(--ease);
}

.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:8px;
  width:0;
  height:2px;
  background:var(--c-accent);
  transform:translateX(-50%);
  transition:width .28s var(--ease);
}

.nav-link:hover{ color:var(--c-ink); }
.nav-link:hover::after{ width:60%; }

.nav-link.is-active{ color:var(--c-ink); font-weight:600; }
.nav-link.is-active::after{ width:60%; }

.header-actions{ display:flex; align-items:center; gap:10px; }

.menu-toggle{
  width:44px;
  height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--c-line);
  border-radius:var(--r-btn);
  background:var(--c-surface);
  cursor:pointer;
  transition:border-color .22s var(--ease), transform .22s var(--ease);
}

.menu-toggle:hover{ border-color:rgba(22,25,29,.35); }
.menu-toggle:active{ transform:translateY(1px); }

@media (min-width:1024px){ .menu-toggle{ display:none; } }

.menu-bars{ display:block; width:18px; height:2px; background:var(--c-ink); position:relative; }
.menu-bars::before,.menu-bars::after{
  content:""; position:absolute; left:0; width:18px; height:2px; background:var(--c-ink);
  transition:transform .26s var(--ease);
}
.menu-bars::before{ top:-6px; }
.menu-bars::after{ top:6px; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease), transform .24s var(--ease), box-shadow .24s var(--ease);
}

.btn-primary{ background:var(--c-ink); color:var(--c-cloud); box-shadow:var(--sh-1); }
.btn-primary:hover{ background:var(--c-accent); color:#fff; transform:translateY(-1px); box-shadow:var(--sh-2); }
.btn-primary:active{ transform:translateY(0); }
.btn-primary[disabled]{ background:#B9B6B0; color:#F4F3F0; cursor:not-allowed; box-shadow:none; transform:none; }

.btn-ghost{ background:transparent; color:var(--c-ink); border-color:var(--c-ink); }
.btn-ghost:hover{ background:var(--c-ink); color:var(--c-cloud); transform:translateY(-1px); }

.btn-sm{ min-height:40px; padding:0 18px; font-size:14px; }

.btn-text{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:44px;
  color:var(--c-jade);
  font-weight:600;
  position:relative;
}
.btn-text::after{
  content:"";
  position:absolute;
  left:0;
  bottom:10px;
  height:1px;
  width:0;
  background:var(--c-jade);
  transition:width .28s var(--ease);
}
.btn-text:hover::after{ width:100%; }

/* ---------- 移动端菜单 ---------- */
.mobile-menu{
  position:fixed;
  inset:0;
  z-index:70;
  background:rgba(250,249,246,.97);
  padding:88px 24px 40px;
  display:flex;
  flex-direction:column;
  gap:6px;
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
}

.mobile-menu.is-open{ opacity:1; visibility:visible; transform:translateY(0); }

.mobile-menu a{
  font-size:22px;
  font-weight:700;
  letter-spacing:-.01em;
  padding:16px 4px;
  border-bottom:1px solid var(--c-line);
  opacity:0;
  transform:translateY(8px);
  transition:opacity .3s var(--ease), transform .3s var(--ease), color .2s var(--ease);
}

.mobile-menu.is-open a{ opacity:1; transform:translateY(0); }
.mobile-menu.is-open a:nth-child(1){ transition-delay:.04s; }
.mobile-menu.is-open a:nth-child(2){ transition-delay:.08s; }
.mobile-menu.is-open a:nth-child(3){ transition-delay:.12s; }
.mobile-menu.is-open a:nth-child(4){ transition-delay:.16s; }
.mobile-menu a:hover{ color:var(--c-accent); }

.menu-close{
  position:absolute;
  top:20px;
  right:20px;
  width:44px;
  height:44px;
  border:1px solid var(--c-line);
  border-radius:var(--r-btn);
  background:var(--c-surface);
  cursor:pointer;
  font-size:20px;
  line-height:1;
}

/* ---------- 文章头部 ---------- */
.article-hero{
  position:relative;
  background:var(--c-ink);
  color:#fff;
  overflow:hidden;
  padding:52px 0 56px;
}

@media (min-width:768px){ .article-hero{ padding:68px 0 72px; } }

.article-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  opacity:.26;
}

.article-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(120% 90% at 82% 12%, rgba(225,84,43,.14) 0%, rgba(225,84,43,0) 58%);
}

.article-hero .container{ position:relative; z-index:2; }

.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:rgba(255,255,255,.62);
  margin-bottom:24px;
}

.crumbs a{ color:rgba(255,255,255,.78); transition:color .2s var(--ease); }
.crumbs a:hover{ color:#fff; text-decoration:underline; text-underline-offset:4px; }
.crumbs .sep{ color:rgba(255,255,255,.32); }
.crumbs .current{ color:#fff; }

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 14px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  background:var(--c-accent-soft);
  color:var(--c-accent);
  border:1px solid rgba(225,84,43,.22);
}

.badge-jade{
  background:rgba(46,111,101,.1);
  color:var(--c-jade);
  border-color:rgba(46,111,101,.2);
}

.article-hero h1{
  font-family:var(--font-serif);
  font-size:clamp(28px,4vw,44px);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.02em;
  margin:18px 0 0;
  overflow-wrap:anywhere;
  max-width:900px;
}

.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px 24px;
  margin-top:26px;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.16);
  font-size:13.5px;
  color:rgba(255,255,255,.72);
}

.article-meta span{ display:inline-flex; align-items:center; gap:7px; }
.article-meta .dot{ width:5px; height:5px; border-radius:50%; background:var(--c-accent); }

/* ---------- 正文区 ---------- */
.article-section{ padding:48px 0 64px; }

@media (min-width:768px){ .article-section{ padding:64px 0 88px; } }

.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:48px;
}

@media (min-width:1280px){
  .article-layout{ grid-template-columns:minmax(0,1fr) 296px; gap:64px; }
}

.article-main{
  min-width:0;
  max-width:780px;
  margin:0 auto;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:30px 24px 40px;
  box-shadow:var(--sh-1);
}

@media (min-width:768px){ .article-main{ padding:48px 56px 56px; } }

.prose-like{ font-size:17px; line-height:1.9; color:#23272D; overflow-wrap:anywhere; }
@media (min-width:768px){ .prose-like{ font-size:17.5px; } }

.prose-like > *:first-child{ margin-top:0; }

.prose-like p{ margin:0 0 1.4em; }

.prose-like h2{
  position:relative;
  font-family:var(--font-serif);
  font-size:clamp(22px,2.6vw,28px);
  font-weight:700;
  line-height:1.32;
  letter-spacing:-.015em;
  margin:2.4em 0 .8em;
  padding-left:16px;
}

.prose-like h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.3em;
  width:3px;
  height:1.05em;
  background:var(--c-accent);
  border-radius:2px;
}

.prose-like h3{
  font-size:19px;
  font-weight:700;
  line-height:1.45;
  margin:1.6em 0 .6em;
}

.prose-like ul,.prose-like ol{ margin:0 0 1.4em; padding-left:0; list-style:none; }

.prose-like ul li{
  position:relative;
  padding-left:22px;
  margin-bottom:.55em;
}

.prose-like ul li::before{
  content:"—";
  position:absolute;
  left:0;
  color:var(--c-accent);
  font-weight:700;
}

.prose-like ol{ counter-reset:item; }
.prose-like ol li{
  position:relative;
  padding-left:30px;
  margin-bottom:.55em;
  counter-increment:item;
}
.prose-like ol li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;
  left:0;
  top:.1em;
  font-size:13px;
  font-weight:700;
  color:var(--c-jade);
}

.prose-like blockquote{
  margin:1.8em 0;
  padding:18px 22px;
  border-left:3px solid var(--c-accent);
  background:var(--c-accent-soft);
  border-radius:0 var(--r-img) var(--r-img) 0;
  color:var(--c-ink-soft);
  font-size:16.5px;
}

.prose-like blockquote p:last-child{ margin-bottom:0; }

.prose-like img{
  width:100%;
  height:auto;
  border-radius:var(--r-img);
  border:1px solid var(--c-line);
  margin:1.8em 0 .7em;
}

.prose-like a{
  color:var(--c-jade);
  text-decoration:underline;
  text-underline-offset:4px;
  text-decoration-thickness:1px;
  transition:color .2s var(--ease);
}
.prose-like a:hover{ color:var(--c-accent); }

.prose-like table{
  width:100%;
  border-collapse:collapse;
  margin:1.8em 0;
  font-size:15.5px;
}

.prose-like th,.prose-like td{
  border:1px solid var(--c-line);
  padding:11px 14px;
  text-align:left;
  vertical-align:top;
}

.prose-like th{ background:rgba(22,25,29,.04); font-weight:700; }
.prose-like tbody tr:nth-child(even){ background:rgba(22,25,29,.018); }

.prose-like hr{ border:none; border-top:1px solid var(--c-line); margin:2.4em 0; }

/* ---------- 侧栏 ---------- */
.article-aside{ display:none; }

@media (min-width:1280px){ .article-aside{ display:block; } }

.aside-sticky{ position:sticky; top:104px; display:grid; gap:18px; }

.aside-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--sh-1);
}

.aside-card h3{
  font-size:15px;
  font-weight:700;
  margin:0 0 14px;
  padding-bottom:12px;
  border-bottom:1px solid var(--c-line);
}

.aside-card ul{ list-style:none; margin:0; padding:0; display:grid; gap:10px; }

.aside-card ul a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-size:14.5px;
  color:var(--c-ink-soft);
  padding:6px 0;
  transition:color .2s var(--ease), transform .2s var(--ease);
}

.aside-card ul a:hover{ color:var(--c-ink); transform:translateX(3px); }

.aside-note{ font-size:14px; color:var(--c-ink-soft); line-height:1.75; margin:0 0 16px; }

/* ---------- 空态 ---------- */
.empty-state{
  text-align:center;
  padding:64px 20px;
  border:1px dashed var(--c-line);
  border-radius:var(--r-card);
  background:var(--c-accent-soft);
}

.empty-state p{ margin:0 0 14px; font-size:16px; color:var(--c-ink-soft); }

/* ---------- 相关推荐 ---------- */
.related{ padding:0 0 72px; }
@media (min-width:768px){ .related{ padding:0 0 96px; } }

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  padding-bottom:20px;
  border-bottom:1px solid var(--c-line);
  margin-bottom:36px;
}

.section-head h2{
  font-family:var(--font-serif);
  font-size:clamp(24px,3vw,30px);
  font-weight:800;
  letter-spacing:-.02em;
  margin:0;
}

.section-head p{ margin:6px 0 0; font-size:15px; color:var(--c-ink-soft); }

.card-grid{ display:grid; grid-template-columns:1fr; gap:24px; }
@media (min-width:640px){ .card-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (min-width:1024px){ .card-grid{ grid-template-columns:repeat(3,minmax(0,1fr)); } }

.post-card{
  display:flex;
  flex-direction:column;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .26s var(--ease), box-shadow .26s var(--ease), border-color .26s var(--ease);
}

.post-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--sh-2);
  border-color:rgba(22,25,29,.2);
}

.post-card .thumb{ aspect-ratio:16/10; overflow:hidden; background:var(--c-accent-soft); }
.post-card .thumb img{ width:100%; height:100%; object-fit:cover; transition:transform .4s var(--ease); }
.post-card:hover .thumb img{ transform:scale(1.02); }

.post-card .body{ padding:20px 22px 22px; display:flex; flex-direction:column; gap:10px; flex:1; }

.post-card h3{
  font-size:18px;
  font-weight:700;
  line-height:1.5;
  margin:0;
  overflow-wrap:anywhere;
}

.post-card .excerpt{
  font-size:14px;
  line-height:1.75;
  color:var(--c-ink-soft);
  margin:0;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.post-card .foot{
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--c-line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--c-ink-soft);
}

.post-card .foot .arrow{ color:var(--c-accent); font-weight:700; transition:transform .26s var(--ease); }
.post-card:hover .foot .arrow{ transform:translateX(4px); }

.back-row{ margin-top:36px; display:flex; justify-content:center; }

/* ---------- CTA ---------- */
.cta-band{ padding:0 0 72px; }
@media (min-width:768px){ .cta-band{ padding:0 0 96px; } }

.cta-panel{
  position:relative;
  background:var(--c-ink);
  color:#fff;
  border-radius:var(--r-card);
  padding:40px 26px;
  overflow:hidden;
  display:grid;
  gap:26px;
}

@media (min-width:768px){ .cta-panel{ padding:56px 52px; grid-template-columns:minmax(0,1fr) auto; align-items:center; gap:40px; } }

.cta-panel::after{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(90% 120% at 92% 8%, rgba(225,84,43,.22) 0%, rgba(225,84,43,0) 60%);
}

.cta-panel > *{ position:relative; z-index:2; }

.cta-panel h2{
  font-family:var(--font-serif);
  font-size:clamp(22px,2.8vw,30px);
  font-weight:800;
  letter-spacing:-.02em;
  margin:0 0 12px;
}

.cta-panel p{ margin:0; color:rgba(255,255,255,.76); font-size:15.5px; max-width:640px; }

.cta-actions{ display:flex; flex-wrap:wrap; gap:12px; }

.btn-light{ background:var(--c-cloud); color:var(--c-ink); }
.btn-light:hover{ background:var(--c-accent); color:#fff; transform:translateY(-1px); }

.btn-outline-light{ background:transparent; color:#fff; border-color:rgba(255,255,255,.55); }
.btn-outline-light:hover{ background:#fff; color:var(--c-ink); transform:translateY(-1px); }

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-ink);
  color:rgba(255,255,255,.72);
  padding:64px 0 28px;
  border-top:1px solid rgba(255,255,255,.08);
}

.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
}

@media (min-width:640px){ .footer-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (min-width:1024px){ .footer-grid{ grid-template-columns:1.4fr 1fr 1fr 1fr; gap:48px; } }

.footer-brand b{ display:block; color:#fff; font-size:18px; font-weight:800; letter-spacing:-.01em; }
.footer-brand small{ display:block; font-size:12px; letter-spacing:.16em; color:rgba(255,255,255,.5); margin-top:4px; }
.footer-brand p{ margin:14px 0 0; font-size:14px; line-height:1.8; max-width:320px; }

.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin:0 0 16px;
}

.footer-col ul{ list-style:none; margin:0; padding:0; display:grid; gap:10px; }

.footer-col a{
  font-size:14px;
  color:rgba(255,255,255,.7);
  transition:color .2s var(--ease), padding-left .2s var(--ease);
}

.footer-col a:hover{ color:#fff; padding-left:4px; }

.footer-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ---------- 入场动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s var(--ease), transform .5s var(--ease);
}

.reveal.is-visible{ opacity:1; transform:none; }

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

@media (max-width:519px){
  body{ font-size:16px; }
  .article-main{ padding:24px 18px 32px; border-radius:12px; }
  .cta-panel{ padding:32px 20px; }
  .brand-text b{ font-size:16px; }
}

/* roulang page: category1 */
:root{
    --c-ink:#16191D;
    --c-ink-soft:#3A4049;
    --c-cloud:#FAF9F6;
    --c-surface:#FFFFFF;
    --c-line:#E6E3DD;
    --c-accent:#E1542B;
    --c-accent-soft:#FDF0EA;
    --c-jade:#2E6F65;
    --r-card:14px;
    --r-btn:10px;
    --r-img:12px;
    --sh-1:0 1px 2px rgba(22,25,29,.04);
    --sh-2:0 14px 36px -14px rgba(22,25,29,.16);
    --ease:cubic-bezier(.22,1,.36,1);
    --font-ui:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
    --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC",serif;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:var(--font-ui);
    font-size:16px;
    line-height:1.85;
    color:var(--c-ink);
    background:var(--c-cloud);
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;object-fit:cover}
  a{color:inherit}
  button{font-family:inherit}
  h1,h2,h3,h4,p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--c-accent);outline-offset:3px}

  .container{width:100%;max-width:1200px;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{max-width:1280px;padding-left:48px;padding-right:48px}}

  /* ---------- 顶栏 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(250,249,246,.96);
    border-bottom:1px solid transparent;
    transition:border-color .28s var(--ease),box-shadow .28s var(--ease);
  }
  .site-header.is-scrolled{
    border-bottom-color:var(--c-line);
    box-shadow:var(--sh-1);
    backdrop-filter:blur(10px);
  }
  .header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px}
  @media (min-width:1024px){.header-inner{height:76px}}

  .brand{display:flex;align-items:center;gap:10px;text-decoration:none}
  .brand-mark{width:34px;height:34px;flex:0 0 auto}
  .brand-text{display:flex;flex-direction:column;line-height:1.15}
  .brand-text b{font-size:17px;font-weight:700;letter-spacing:-.02em;color:var(--c-ink)}
  .brand-text small{font-size:11px;letter-spacing:.14em;color:var(--c-ink-soft);margin-top:3px}
  @media (min-width:1024px){
    .brand-mark{width:38px;height:38px}
    .brand-text b{font-size:19px}
    .brand-text small{font-size:12px}
  }

  .nav-links{display:none}
  @media (min-width:1024px){
    .nav-links{display:flex;align-items:center;gap:30px}
  }
  .nav-link{
    position:relative;display:inline-block;
    padding:8px 0;font-size:15px;color:var(--c-ink-soft);text-decoration:none;
    transition:color .22s var(--ease);
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;
    background:var(--c-accent);transform:translateX(-50%);
    transition:width .26s var(--ease);
  }
  .nav-link:hover{color:var(--c-ink)}
  .nav-link:hover::after{width:60%}
  .nav-link.is-active{color:var(--c-ink);font-weight:600}
  .nav-link.is-active::after{width:60%}

  .header-actions{display:flex;align-items:center;gap:12px}
  .header-cta{display:none}
  @media (min-width:1024px){.header-cta{display:inline-flex}}

  .nav-toggle{
    display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
    width:44px;height:44px;padding:0 11px;background:transparent;
    border:1px solid rgba(22,25,29,.22);border-radius:var(--r-btn);cursor:pointer;
    transition:border-color .22s var(--ease)
  }
  .nav-toggle:hover{border-color:var(--c-ink)}
  .nav-toggle span{display:block;height:2px;background:var(--c-ink);border-radius:2px}
  @media (min-width:1024px){.nav-toggle{display:none}}

  .mobile-menu{
    position:fixed;inset:0;z-index:80;
    background:rgba(250,249,246,.97);
    padding:88px 24px 40px;
    display:none;overflow-y:auto;
  }
  .mobile-menu.is-open{display:block}
  .mobile-menu .m-link{
    display:block;padding:16px 0;font-size:21px;font-weight:600;letter-spacing:-.01em;
    color:var(--c-ink);text-decoration:none;border-bottom:1px solid var(--c-line);
  }
  .mobile-menu .m-link.is-active{color:var(--c-accent)}
  .mobile-close{
    position:absolute;top:20px;right:20px;width:44px;height:44px;
    display:inline-flex;align-items:center;justify-content:center;
    background:transparent;border:1px solid rgba(22,25,29,.22);border-radius:var(--r-btn);
    font-size:20px;line-height:1;color:var(--c-ink);cursor:pointer;
  }
  .mobile-close:hover{border-color:var(--c-ink)}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 22px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;
    border:1px solid transparent;
    transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
  }
  .btn-primary{background:var(--c-ink);color:#fff}
  .btn-primary:hover{background:var(--c-accent);transform:translateY(-1px)}
  .btn-ghost{background:transparent;color:var(--c-ink);border-color:rgba(22,25,29,.28)}
  .btn-ghost:hover{background:var(--c-ink);color:#fff;border-color:var(--c-ink)}
  .btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none}

  .on-dark .btn-primary{background:var(--c-accent);color:#fff}
  .on-dark .btn-primary:hover{background:#fff;color:var(--c-ink)}
  .on-dark .btn-ghost{color:#fff;border-color:rgba(255,255,255,.4)}
  .on-dark .btn-ghost:hover{background:#fff;color:var(--c-ink);border-color:#fff}

  .link-underline{
    position:relative;display:inline-block;text-decoration:none;
    color:var(--c-jade);font-weight:600;font-size:15px;padding-bottom:2px;
  }
  .link-underline::after{
    content:"";position:absolute;left:0;bottom:0;width:0;height:1px;
    background:var(--c-jade);transition:width .28s var(--ease);
  }
  .link-underline:hover::after{width:100%}

  /* ---------- 首屏 ---------- */
  .page-hero{
    position:relative;color:#fff;background-color:var(--c-ink);
    background-image:linear-gradient(180deg,rgba(22,25,29,.9),rgba(22,25,29,.96)),url('/assets/images/backpic/back-2.webp');
    background-size:cover;background-position:center;
    padding:48px 0 56px;overflow:hidden;
  }
  @media (min-width:768px){.page-hero{padding:64px 0 72px}}
  @media (min-width:1024px){.page-hero{padding:76px 0 84px}}

  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:28px;flex-wrap:wrap}
  .breadcrumb a{color:rgba(255,255,255,.72);text-decoration:none;transition:color .2s var(--ease)}
  .breadcrumb a:hover{color:#fff}
  .breadcrumb .sep{color:rgba(255,255,255,.3)}
  .breadcrumb .current{color:#fff;font-weight:600}

  .hero-grid{display:grid;gap:36px;align-items:end}
  @media (min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:56px}}

  .kicker{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;letter-spacing:.16em;color:var(--c-accent);
    border:1px solid rgba(225,84,43,.5);border-radius:999px;
    padding:5px 14px;margin-bottom:20px;
  }
  .kicker::before{content:"";width:16px;height:1px;background:var(--c-accent)}

  .page-title{
    font-family:var(--font-serif);
    font-size:clamp(30px,4vw,46px);
    font-weight:700;letter-spacing:-.02em;line-height:1.16;
  }
  .hero-lead{
    margin-top:20px;font-size:16px;line-height:1.9;color:rgba(255,255,255,.76);
    max-width:620px;
  }
  @media (min-width:768px){.hero-lead{font-size:17px}}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}

  .hero-figure{border:1px solid rgba(255,255,255,.18);border-radius:var(--r-img);overflow:hidden}
  .hero-figure img{width:100%;aspect-ratio:16/10;height:auto}
  @media (min-width:1024px){.hero-figure img{aspect-ratio:4/3}}

  .hero-foot{
    margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.16);
    display:flex;flex-wrap:wrap;gap:14px 32px;font-size:13px;color:rgba(255,255,255,.62);
  }
  .hero-foot span{display:inline-flex;align-items:center;gap:8px}
  .hero-foot span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--c-accent)}

  /* ---------- 通用板块 ---------- */
  .section{padding:64px 0}
  @media (min-width:768px){.section{padding:88px 0}}
  @media (min-width:1024px){.section{padding:110px 0}}

  .section-head{margin-bottom:40px}
  @media (min-width:768px){.section-head{margin-bottom:52px}}
  .section-title{
    font-family:var(--font-serif);
    font-size:clamp(24px,3vw,32px);
    font-weight:700;letter-spacing:-.02em;line-height:1.25;
  }
  .section-title::before{
    content:"";display:block;width:32px;height:2px;background:var(--c-accent);
    margin-bottom:16px;
  }
  .section-sub{margin-top:14px;font-size:16px;color:var(--c-ink-soft);max-width:720px}

  /* ---------- 索引布局 ---------- */
  .cat-layout{display:grid;gap:36px}
  @media (min-width:1024px){.cat-layout{grid-template-columns:3fr 9fr;gap:56px}}

  .toc{display:none}
  @media (min-width:1024px){
    .toc{display:block;position:sticky;top:104px;align-self:start}
  }
  .toc-title{font-size:13px;letter-spacing:.16em;color:var(--c-ink-soft);margin-bottom:16px}
  .toc-list{display:grid;gap:2px}
  .toc-list a{
    display:block;padding:11px 14px;font-size:15px;color:var(--c-ink-soft);
    text-decoration:none;border-left:2px solid var(--c-line);
    transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease);
  }
  .toc-list a:hover{color:var(--c-ink);border-left-color:var(--c-accent);background:var(--c-accent-soft)}

  .entry-list{border-top:1px solid var(--c-line)}
  .entry-row{
    display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;
    min-height:88px;padding:22px 4px;border-bottom:1px solid var(--c-line);
    text-decoration:none;color:inherit;
    transition:transform .24s var(--ease),background-color .24s var(--ease);
  }
  .entry-row:hover{transform:translateX(4px);background:rgba(255,255,255,.7)}
  .entry-num{
    font-family:var(--font-serif);font-size:22px;font-weight:700;color:var(--c-accent);
    min-width:38px;transition:color .24s var(--ease);
  }
  .entry-row:hover .entry-num{color:var(--c-ink)}
  .entry-body h3{font-size:18px;font-weight:600;letter-spacing:-.01em;color:var(--c-ink)}
  .entry-body p{margin-top:6px;font-size:14px;color:var(--c-ink-soft);line-height:1.7}
  .entry-arrow{
    width:36px;height:36px;flex:0 0 auto;border:1px solid var(--c-line);border-radius:50%;
    display:inline-flex;align-items:center;justify-content:center;
    color:var(--c-ink-soft);font-size:15px;
    transition:border-color .24s var(--ease),color .24s var(--ease),transform .24s var(--ease);
  }
  .entry-row:hover .entry-arrow{border-color:var(--c-accent);color:var(--c-accent);transform:translateX(2px)}
  @media (max-width:520px){
    .entry-row{grid-template-columns:auto 1fr;gap:14px}
    .entry-arrow{display:none}
  }

  /* ---------- 数据条 ---------- */
  .stats-band{border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);background:var(--c-surface)}
  .stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0}
  @media (min-width:1024px){.stats-grid{grid-template-columns:repeat(4,1fr)}}
  .stat{padding:30px 22px;border-right:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
  .stat:nth-child(2n){border-right:none}
  @media (min-width:1024px){
    .stat{border-bottom:none;padding:44px 30px}
    .stat:nth-child(2n){border-right:1px solid var(--c-line)}
    .stat:last-child{border-right:none}
  }
  .stat-num{
    font-family:var(--font-serif);font-size:40px;font-weight:700;line-height:1;
    color:var(--c-jade);letter-spacing:-.02em;
  }
  @media (min-width:768px){.stat-num{font-size:48px}}
  .stat-label{margin-top:12px;font-size:14px;color:var(--c-ink-soft);line-height:1.7}

  /* ---------- 深色说明面板 ---------- */
  .check-panel{
    background:var(--c-ink);color:#fff;border-radius:var(--r-card);
    padding:36px 26px;
  }
  @media (min-width:768px){.check-panel{padding:52px 48px}}
  .check-panel h3{font-family:var(--font-serif);font-size:22px;font-weight:700;letter-spacing:-.01em}
  @media (min-width:768px){.check-panel h3{font-size:26px}}
  .check-panel p.lead{margin-top:14px;font-size:15px;color:rgba(255,255,255,.72);max-width:680px}
  .check-list{display:grid;gap:0;margin-top:32px;border-top:1px solid rgba(255,255,255,.14)}
  @media (min-width:768px){.check-list{grid-template-columns:1fr 1fr;column-gap:40px}}
  .check-list li{
    padding:18px 0 18px 26px;border-bottom:1px solid rgba(255,255,255,.14);
    position:relative;font-size:15px;color:rgba(255,255,255,.84);
  }
  .check-list li::before{
    content:"";position:absolute;left:0;top:26px;width:12px;height:1px;background:var(--c-accent);
  }

  /* ---------- 图文交错 ---------- */
  .split{display:grid;gap:32px;align-items:center}
  @media (min-width:1024px){
    .split{grid-template-columns:6fr 6fr;gap:56px}
    .split.reverse .split-media{order:2}
  }
  .split-media img{
    width:100%;aspect-ratio:16/10;border-radius:var(--r-img);
    border:1px solid var(--c-line);
  }
  .split-body h3{font-family:var(--font-serif);font-size:24px;font-weight:700;letter-spacing:-.01em;line-height:1.35}
  .split-body p{margin-top:16px;font-size:16px;color:var(--c-ink-soft)}
  .point-list{margin-top:22px;display:grid;gap:12px}
  .point-list li{position:relative;padding-left:22px;font-size:15px;color:var(--c-ink-soft)}
  .point-list li::before{
    content:"";position:absolute;left:0;top:11px;width:10px;height:1px;background:var(--c-jade);
  }
  .split-body .link-underline{margin-top:24px}

  /* ---------- FAQ ---------- */
  .faq-layout{display:grid;gap:32px}
  @media (min-width:1024px){.faq-layout{grid-template-columns:4fr 8fr;gap:56px}}
  .faq-list{display:grid;gap:12px}
  .faq-item{
    border:1px solid var(--c-line);border-radius:var(--r-card);background:var(--c-surface);
    transition:border-color .26s var(--ease);
  }
  .faq-item[open]{border-color:var(--c-ink)}
  .faq-item summary{
    list-style:none;cursor:pointer;padding:20px 22px;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    font-size:16px;font-weight:600;color:var(--c-ink);
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::after{
    content:"+";font-size:20px;line-height:1;color:var(--c-accent);
    transition:transform .28s var(--ease);flex:0 0 auto;
  }
  .faq-item[open] summary::after{transform:rotate(45deg)}
  .faq-item .faq-answer{padding:0 22px 22px;font-size:15px;color:var(--c-ink-soft);line-height:1.85}

  /* ---------- CTA ---------- */
  .cta-band{padding:0 0 64px}
  @media (min-width:768px){.cta-band{padding:0 0 96px}}
  .cta-panel{
    background:var(--c-ink);color:#fff;border-radius:var(--r-card);
    padding:40px 26px;display:grid;gap:26px;align-items:center;
  }
  @media (min-width:768px){.cta-panel{padding:56px 48px}}
  @media (min-width:1024px){.cta-panel{grid-template-columns:8fr 4fr;gap:40px}}
  .cta-panel h2{font-family:var(--font-serif);font-size:clamp(22px,2.6vw,30px);font-weight:700;letter-spacing:-.02em;line-height:1.3}
  .cta-panel p{margin-top:14px;font-size:15px;color:rgba(255,255,255,.74);max-width:620px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}
  @media (min-width:1024px){.cta-actions{justify-content:flex-end}}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--c-ink);color:rgba(255,255,255,.7);padding:64px 0 24px}
  .footer-grid{display:grid;gap:36px}
  @media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px}}
  .footer-brand b{display:block;color:#fff;font-size:18px;font-weight:700;letter-spacing:-.01em}
  .footer-brand small{display:block;margin-top:6px;font-size:12px;letter-spacing:.14em;color:rgba(255,255,255,.5)}
  .footer-brand p{margin-top:12px;font-size:14px;line-height:1.85;max-width:320px}
  .footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
  .footer-col ul{display:grid;gap:10px}
  .footer-col a{
    font-size:14px;color:rgba(255,255,255,.7);text-decoration:none;
    transition:color .22s var(--ease);
  }
  .footer-col a:hover{color:#fff}
  .footer-bottom{
    margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
    font-size:13px;color:rgba(255,255,255,.55);
  }

  /* ---------- 入场动画 ---------- */
  .js .reveal{opacity:0;transform:translateY(12px)}
  .js .reveal.is-visible{
    opacity:1;transform:none;
    transition:opacity .5s var(--ease),transform .5s var(--ease);
  }
  .js .reveal.d-1.is-visible{transition-delay:.06s}
  .js .reveal.d-2.is-visible{transition-delay:.12s}
  .js .reveal.d-3.is-visible{transition-delay:.18s}

  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto}
    .js .reveal,.js .reveal.is-visible{opacity:1;transform:none;transition:none}
    .entry-row:hover{transform:none}
    .btn:hover{transform:none}
    *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  }

/* roulang page: category2 */
:root{
    --c-ink:#16191D;
    --c-ink-soft:#3A4049;
    --c-cloud:#FAF9F6;
    --c-surface:#FFFFFF;
    --c-line:#E6E3DD;
    --c-accent:#E1542B;
    --c-accent-soft:#FDF0EA;
    --c-jade:#2E6F65;
    --r-card:14px;
    --r-btn:10px;
    --r-img:12px;
    --shadow-1:0 1px 2px rgba(22,25,29,.04);
    --shadow-2:0 14px 36px -14px rgba(22,25,29,.16);
    --ease:cubic-bezier(.22,1,.36,1);
    --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
    --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC",serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--c-cloud);
    color:var(--c-ink);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;height:auto;}
  a{color:inherit;text-decoration:none;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4{margin:0;letter-spacing:-.02em;line-height:1.2;font-weight:700;}
  p{margin:0;}
  button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
  a:focus-visible,button:focus-visible,summary:focus-visible{
    outline:2px solid var(--c-accent);
    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 32px;} }
  @media (min-width:1280px){ .container{max-width:1280px;padding:0 48px;} }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:46px;
    padding:12px 24px;
    border-radius:var(--r-btn);
    font-size:15px;
    font-weight:600;
    letter-spacing:.01em;
    transition:background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
    border:1px solid transparent;
    white-space:nowrap;
  }
  .btn-primary{
    background:var(--c-ink);
    color:#F7F6F3;
    border-color:var(--c-ink);
  }
  .btn-primary:hover{
    background:var(--c-accent);
    border-color:var(--c-accent);
    transform:translateY(-1px);
  }
  .btn-primary:active{transform:translateY(0);}
  .btn-ghost{
    background:transparent;
    color:var(--c-ink);
    border-color:rgba(22,25,29,.55);
  }
  .btn-ghost:hover{
    background:var(--c-ink);
    color:#F7F6F3;
    border-color:var(--c-ink);
    transform:translateY(-1px);
  }
  .btn-light{
    background:#F7F6F3;
    color:var(--c-ink);
    border-color:#F7F6F3;
  }
  .btn-light:hover{
    background:var(--c-accent);
    border-color:var(--c-accent);
    color:#FFF7F3;
    transform:translateY(-1px);
  }
  .btn-outline-light{
    background:transparent;
    color:#F2F0EC;
    border-color:rgba(242,240,236,.55);
  }
  .btn-outline-light:hover{
    background:#F2F0EC;
    color:var(--c-ink);
    border-color:#F2F0EC;
    transform:translateY(-1px);
  }

  .text-link{
    display:inline-flex;
    align-items:center;
    gap:6px;
    color:var(--c-jade);
    font-weight:600;
    font-size:14.5px;
    position:relative;
    padding-bottom:2px;
  }
  .text-link::after{
    content:"";
    position:absolute;
    left:0;bottom:0;
    width:0;height:1px;
    background:var(--c-jade);
    transition:width .28s var(--ease);
  }
  .text-link:hover::after{width:100%;}
  .text-link svg{transition:transform .28s var(--ease);}
  .text-link:hover svg{transform:translateX(4px);}

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(250,249,246,.94);
    backdrop-filter:saturate(140%) blur(8px);
    border-bottom:1px solid transparent;
    transition:border-color .28s var(--ease),box-shadow .28s var(--ease);
  }
  .site-header.is-scrolled{
    border-bottom-color:var(--c-line);
    box-shadow:0 1px 2px rgba(22,25,29,.04);
  }
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    min-height:64px;
  }
  @media (min-width:1024px){ .header-inner{min-height:76px;} }

  .brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
  .brand-mark{width:36px;height:36px;flex-shrink:0;}
  .brand-text{display:flex;flex-direction:column;line-height:1.1;}
  .brand-text b{font-size:16.5px;font-weight:800;letter-spacing:-.01em;color:var(--c-ink);}
  .brand-text small{font-size:11.5px;color:var(--c-ink-soft);letter-spacing:.14em;margin-top:3px;}

  .nav-links{display:none;align-items:center;gap:6px;}
  @media (min-width:1024px){ .nav-links{display:flex;} }
  .nav-link{
    position:relative;
    display:inline-flex;
    align-items:center;
    min-height:44px;
    padding:6px 14px;
    font-size:15px;
    color:var(--c-ink-soft);
    transition:color .24s var(--ease);
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:50%;bottom:6px;
    width:0;height:2px;
    background:var(--c-accent);
    transform:translateX(-50%);
    transition:width .28s var(--ease);
  }
  .nav-link:hover{color:var(--c-ink);}
  .nav-link:hover::after{width:60%;}
  .nav-link.is-active{color:var(--c-ink);font-weight:600;}
  .nav-link.is-active::after{width:60%;}

  .nav-cta{display:none;}
  @media (min-width:1024px){ .nav-cta{display:inline-flex;padding:10px 20px;min-height:42px;} }

  .nav-toggle{
    display:inline-flex;
    flex-direction:column;
    justify-content:center;
    gap:5px;
    width:46px;height:46px;
    align-items:center;
    border:1px solid var(--c-line);
    border-radius:var(--r-btn);
    background:var(--c-surface);
    transition:border-color .24s var(--ease);
  }
  .nav-toggle:hover{border-color:rgba(22,25,29,.4);}
  .nav-toggle span{display:block;width:18px;height:1.6px;background:var(--c-ink);transition:transform .24s var(--ease);}
  @media (min-width:1024px){ .nav-toggle{display:none;} }

  .mobile-menu{
    position:fixed;
    inset:0;
    z-index:80;
    background:rgba(250,249,246,.97);
    display:flex;
    flex-direction:column;
    justify-content:center;
    padding:84px 28px 40px;
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease);
  }
  .mobile-menu.is-open{opacity:1;visibility:visible;transform:translateY(0);}
  .mobile-nav{display:flex;flex-direction:column;gap:4px;}
  .mobile-nav a{
    font-size:22px;
    font-weight:700;
    padding:14px 0;
    border-bottom:1px solid var(--c-line);
    color:var(--c-ink);
  }
  .mobile-nav a.is-active{color:var(--c-accent);}
  .mobile-cta{margin-top:32px;width:100%;}
  .menu-close{
    position:absolute;
    top:18px;right:20px;
    width:46px;height:46px;
    border:1px solid var(--c-line);
    border-radius:var(--r-btn);
    font-size:22px;
    line-height:1;
    color:var(--c-ink);
    background:var(--c-surface);
  }

  /* ---------- 分类首屏 ---------- */
  .cat-hero{
    position:relative;
    background:var(--c-ink);
    color:#F2F0EC;
    padding:64px 0 72px;
    overflow:hidden;
    isolation:isolate;
  }
  .cat-hero::before{
    content:"";
    position:absolute;
    inset:0;
    background-image:url(/assets/images/backpic/back-2.webp);
    background-size:cover;
    background-position:center right;
    opacity:.24;
    z-index:-2;
  }
  .cat-hero::after{
    content:"";
    position:absolute;
    inset:0;
    background:radial-gradient(58% 52% at 78% 22%, rgba(225,84,43,.06), transparent 70%);
    z-index:-1;
  }
  @media (min-width:768px){ .cat-hero{padding:88px 0 96px;} }
  @media (min-width:1280px){ .cat-hero{padding:104px 0 112px;} }

  .hero-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:40px;
    align-items:center;
  }
  @media (min-width:1024px){
    .hero-grid{grid-template-columns:1.06fr .94fr;gap:56px;}
  }

  .breadcrumb{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:rgba(242,240,236,.66);
    margin-bottom:22px;
  }
  .breadcrumb a{color:rgba(242,240,236,.78);transition:color .24s var(--ease);}
  .breadcrumb a:hover{color:#FFFFFF;}
  .breadcrumb span.sep{color:rgba(242,240,236,.34);}
  .breadcrumb .current{color:#FFFFFF;}

  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:12.5px;
    letter-spacing:.16em;
    color:var(--c-accent-soft);
    background:rgba(225,84,43,.18);
    border:1px solid rgba(225,84,43,.42);
    border-radius:999px;
    padding:5px 14px;
    margin-bottom:22px;
  }

  .cat-hero h1{
    font-family:var(--font-serif);
    font-size:clamp(32px,4vw,48px);
    font-weight:800;
    line-height:1.16;
    color:#FFFFFF;
    max-width:16em;
  }
  .hero-lead{
    margin-top:22px;
    font-size:17px;
    line-height:1.9;
    color:rgba(242,240,236,.82);
    max-width:34em;
  }

  .chip-row{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top:28px;
  }
  .chip{
    display:inline-flex;
    align-items:center;
    height:32px;
    padding:0 14px;
    border-radius:999px;
    font-size:13px;
    color:rgba(242,240,236,.88);
    border:1px solid rgba(242,240,236,.26);
    background:rgba(242,240,236,.05);
  }

  .hero-actions{
    display:flex;
    flex-wrap:wrap;
    gap:14px;
    margin-top:34px;
  }

  .hero-figure{
    position:relative;
    margin:0;
    border:1px solid rgba(242,240,236,.22);
    border-radius:var(--r-img);
    overflow:hidden;
    box-shadow:0 24px 60px -30px rgba(0,0,0,.65);
  }
  .hero-figure img{
    width:100%;
    aspect-ratio:16/10;
    object-fit:cover;
  }
  .hero-figure figcaption{
    position:absolute;
    left:0;right:0;bottom:0;
    padding:14px 18px;
    font-size:12.5px;
    color:rgba(242,240,236,.86);
    background:linear-gradient(to top, rgba(22,25,29,.86), rgba(22,25,29,0));
  }

  /* ---------- 通用板块 ---------- */
  .section{padding:64px 0;}
  @media (min-width:768px){ .section{padding:96px 0;} }
  @media (min-width:1280px){ .section{padding:120px 0;} }
  .section-tight{padding:56px 0;}
  @media (min-width:768px){ .section-tight{padding:72px 0;} }

  .section-head{max-width:760px;margin-bottom:40px;}
  @media (min-width:768px){ .section-head{margin-bottom:52px;} }
  .section-head .kicker{
    display:inline-flex;
    align-items:center;
    gap:10px;
    font-size:13px;
    letter-spacing:.14em;
    color:var(--c-ink-soft);
    margin-bottom:16px;
  }
  .section-head .kicker::before{
    content:"";
    width:26px;
    height:1px;
    background:var(--c-accent);
  }
  .section-head h2{
    font-family:var(--font-serif);
    font-size:clamp(26px,3vw,32px);
    font-weight:800;
    line-height:1.24;
  }
  .section-head p{
    margin-top:18px;
    font-size:16px;
    color:var(--c-ink-soft);
    line-height:1.9;
  }

  /* ---------- 卡片网格 ---------- */
  .card-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:24px;
  }
  @media (min-width:768px){ .card-grid{grid-template-columns:repeat(2,1fr);} }
  @media (min-width:1024px){ .card-grid{grid-template-columns:repeat(3,1fr);} }

  .exp-card{
    display:flex;
    flex-direction:column;
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    overflow:hidden;
    box-shadow:var(--shadow-1);
    transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
  }
  .exp-card:hover{
    transform:translateY(-3px);
    box-shadow:var(--shadow-2);
    border-color:rgba(22,25,29,.22);
  }
  .exp-card .thumb{
    overflow:hidden;
    background:var(--c-cloud);
  }
  .exp-card .thumb img{
    width:100%;
    aspect-ratio:16/10;
    object-fit:cover;
    transition:transform .32s var(--ease);
  }
  .exp-card:hover .thumb img{transform:scale(1.02);}

  .card-body{
    display:flex;
    flex-direction:column;
    gap:14px;
    padding:22px 22px 24px;
    flex:1;
  }
  .badge{
    display:inline-flex;
    align-items:center;
    align-self:flex-start;
    height:26px;
    padding:0 12px;
    border-radius:999px;
    background:var(--c-accent-soft);
    color:var(--c-accent);
    font-size:12.5px;
    font-weight:600;
    letter-spacing:.02em;
  }
  .exp-card h3{
    font-size:19px;
    font-weight:700;
    line-height:1.5;
    overflow-wrap:anywhere;
  }
  .exp-card .desc{
    font-size:14.5px;
    color:var(--c-ink-soft);
    line-height:1.85;
    overflow-wrap:anywhere;
  }
  .exp-card .card-foot{margin-top:auto;padding-top:6px;}

  @media (min-width:1024px){
    .exp-card.is-wide{grid-column:span 2;}
    .exp-card.is-wide{flex-direction:row;align-items:stretch;}
    .exp-card.is-wide .thumb{flex:1 1 52%;}
    .exp-card.is-wide .thumb img{height:100%;aspect-ratio:auto;min-height:320px;}
    .exp-card.is-wide .card-body{flex:1 1 48%;padding:34px 32px;justify-content:center;}
    .exp-card.is-wide h3{font-size:24px;font-family:var(--font-serif);line-height:1.34;}
    .exp-card.is-wide .desc{font-size:15.5px;}
  }

  .mini-cta{
    display:flex;
    flex-direction:column;
    justify-content:center;
    gap:16px;
    padding:30px 26px;
    border-radius:var(--r-card);
    background:var(--c-ink);
    color:#F2F0EC;
    border:1px solid var(--c-ink);
    transition:transform .28s var(--ease),box-shadow .28s var(--ease);
  }
  .mini-cta:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);}
  .mini-cta h3{font-size:19px;line-height:1.5;color:#FFFFFF;}
  .mini-cta p{font-size:14.5px;color:rgba(242,240,236,.76);}
  .mini-cta .text-link{color:#F2F0EC;}
  .mini-cta .text-link::after{background:var(--c-accent);}

  /* ---------- 数据条 ---------- */
  .stat-strip{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    border-top:1px solid var(--c-line);
    border-bottom:1px solid var(--c-line);
    background:var(--c-surface);
  }
  @media (min-width:1024px){ .stat-strip{grid-template-columns:repeat(4,1fr);} }
  .stat{
    padding:30px 20px;
    border-right:1px solid var(--c-line);
    border-bottom:1px solid var(--c-line);
  }
  .stat:nth-child(2n){border-right:none;}
  .stat:nth-child(n+3){border-bottom:none;}
  @media (min-width:1024px){
    .stat{border-bottom:none;}
    .stat:nth-child(2n){border-right:1px solid var(--c-line);}
    .stat:nth-child(4n){border-right:none;}
  }
  .stat .num{
    font-family:var(--font-serif);
    font-size:clamp(30px,4vw,46px);
    font-weight:800;
    color:var(--c-jade);
    line-height:1.1;
    letter-spacing:-.02em;
  }
  .stat .num small{font-size:.46em;font-family:var(--font-sans);font-weight:600;margin-left:4px;}
  .stat .label{
    margin-top:12px;
    font-size:13.5px;
    color:var(--c-ink-soft);
    line-height:1.7;
  }

  /* ---------- 深色叙事 ---------- */
  .dark-panel{
    position:relative;
    background:var(--c-ink);
    color:#F2F0EC;
    border-radius:18px;
    padding:48px 26px;
    overflow:hidden;
  }
  .dark-panel::after{
    content:"";
    position:absolute;
    inset:0;
    background:radial-gradient(46% 60% at 88% 8%, rgba(225,84,43,.06), transparent 72%);
    pointer-events:none;
  }
  @media (min-width:768px){ .dark-panel{padding:64px 48px;} }
  @media (min-width:1280px){ .dark-panel{padding:72px 64px;} }
  .dark-panel h2{
    font-family:var(--font-serif);
    font-size:clamp(24px,2.8vw,30px);
    color:#FFFFFF;
    line-height:1.3;
    max-width:22em;
  }
  .dark-panel .panel-lead{
    margin-top:18px;
    font-size:16px;
    color:rgba(242,240,236,.78);
    max-width:38em;
  }
  .panel-list{
    position:relative;
    z-index:1;
    display:grid;
    gap:0;
    margin-top:36px;
    border-top:1px solid rgba(242,240,236,.16);
  }
  .panel-item{
    display:flex;
    gap:20px;
    align-items:flex-start;
    padding:24px 0;
    border-bottom:1px solid rgba(242,240,236,.16);
    transition:transform .28s var(--ease);
  }
  .panel-item:hover{transform:translateX(4px);}
  .panel-item .idx{
    font-family:var(--font-serif);
    font-size:22px;
    font-weight:800;
    color:var(--c-accent);
    flex:0 0 auto;
    min-width:44px;
    line-height:1.4;
  }
  .panel-item h3{font-size:18px;color:#FFFFFF;}
  .panel-item p{margin-top:8px;font-size:14.5px;color:rgba(242,240,236,.74);line-height:1.85;}
  .panel-figure{
    position:relative;
    z-index:1;
    margin:36px 0 0;
    border:1px solid rgba(242,240,236,.2);
    border-radius:var(--r-img);
    overflow:hidden;
  }
  .panel-figure img{width:100%;aspect-ratio:21/9;object-fit:cover;}
  @media (min-width:1024px){
    .panel-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start;}
    .panel-figure{margin-top:0;}
    .panel-figure img{aspect-ratio:4/3;}
  }

  /* ---------- FAQ ---------- */
  .faq-layout{display:grid;gap:32px;}
  @media (min-width:1024px){ .faq-layout{grid-template-columns:.82fr 1.18fr;gap:56px;} }
  .faq-list{display:flex;flex-direction:column;gap:12px;}
  .faq-item{
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    transition:border-color .24s var(--ease);
    overflow:hidden;
  }
  .faq-item[open]{border-color:rgba(22,25,29,.6);}
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
    padding:18px 20px;
    font-size:16px;
    font-weight:600;
    color:var(--c-ink);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-icon{
    flex:0 0 auto;
    width:24px;height:24px;
    position:relative;
    transition:transform .3s var(--ease);
  }
  .faq-icon::before,.faq-icon::after{
    content:"";
    position:absolute;
    left:50%;top:50%;
    background:var(--c-accent);
    transform:translate(-50%,-50%);
  }
  .faq-icon::before{width:14px;height:1.6px;}
  .faq-icon::after{width:1.6px;height:14px;}
  .faq-item[open] .faq-icon{transform:rotate(45deg);}
  .faq-answer{
    padding:0 20px 20px;
    font-size:15px;
    color:var(--c-ink-soft);
    line-height:1.9;
    border-top:1px solid var(--c-line);
    padding-top:16px;
    margin-top:-1px;
  }

  /* ---------- CTA ---------- */
  .cta-band{
    background:var(--c-ink);
    color:#F2F0EC;
    border-radius:18px;
    padding:44px 26px;
    display:flex;
    flex-direction:column;
    gap:26px;
  }
  @media (min-width:768px){
    .cta-band{padding:56px 48px;flex-direction:row;align-items:center;justify-content:space-between;}
  }
  .cta-band h2{
    font-family:var(--font-serif);
    font-size:clamp(23px,2.6vw,28px);
    color:#FFFFFF;
    line-height:1.32;
    max-width:22em;
  }
  .cta-band p{
    margin-top:14px;
    font-size:15px;
    color:rgba(242,240,236,.76);
    max-width:34em;
  }
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex-shrink:0;}

  /* ---------- 衔接入口 ---------- */
  .back-links{
    display:flex;
    flex-wrap:wrap;
    gap:26px;
    padding-top:34px;
    margin-top:34px;
    border-top:1px solid var(--c-line);
  }

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:var(--c-ink);
    color:rgba(242,240,236,.78);
    padding:64px 0 28px;
    margin-top:0;
  }
  @media (min-width:768px){ .site-footer{padding:80px 0 32px;} }
  .footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:40px;
  }
  @media (min-width:768px){ .footer-grid{grid-template-columns:repeat(2,1fr);gap:44px;} }
  @media (min-width:1024px){ .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;} }
  .footer-brand b{
    display:block;
    font-size:17px;
    color:#FFFFFF;
    font-weight:800;
    letter-spacing:-.01em;
  }
  .footer-brand small{
    display:block;
    margin-top:6px;
    font-size:12px;
    letter-spacing:.14em;
    color:rgba(242,240,236,.6);
  }
  .footer-brand p{
    margin-top:16px;
    font-size:14px;
    line-height:1.9;
    color:rgba(242,240,236,.72);
    max-width:26em;
  }
  .footer-col h4{
    font-size:14px;
    color:#FFFFFF;
    letter-spacing:.06em;
    margin-bottom:16px;
    font-weight:700;
  }
  .footer-col ul{display:flex;flex-direction:column;gap:12px;}
  .footer-col a{
    font-size:14px;
    color:rgba(242,240,236,.74);
    transition:color .24s var(--ease);
  }
  .footer-col a:hover{color:#FFFFFF;}
  .footer-bottom{
    margin-top:48px;
    padding-top:22px;
    border-top:1px solid rgba(242,240,236,.14);
    display:flex;
    flex-wrap:wrap;
    gap:10px 24px;
    justify-content:space-between;
    font-size:13px;
    color:rgba(242,240,236,.6);
  }

  /* ---------- 入场动效 ---------- */
  .reveal{
    opacity:0;
    transform:translateY(12px);
    transition:opacity .5s var(--ease),transform .5s var(--ease);
  }
  .reveal.is-in{opacity:1;transform:none;}

  @media (prefers-reduced-motion: reduce){
    *,*::before,*::after{
      animation-duration:.01ms !important;
      animation-iteration-count:1 !important;
      transition-duration:.01ms !important;
    }
    .reveal{opacity:1;transform:none;}
    .exp-card:hover,.mini-cta:hover{transform:none;}
    .exp-card:hover .thumb img{transform:none;}
  }

/* roulang page: category3 */
:root{
  --c-ink:#16191D;
  --c-ink-soft:#3A4049;
  --c-cloud:#FAF9F6;
  --c-surface:#FFFFFF;
  --c-line:#E6E3DD;
  --c-accent:#E1542B;
  --c-accent-soft:#FDF0EA;
  --c-jade:#2E6F65;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(22,25,29,.04);
  --sh-2:0 14px 36px -14px rgba(22,25,29,.16);
  --ease:cubic-bezier(.22,1,.36,1);
  --container:1200px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC",serif;
}
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  margin:0;
  background:var(--c-cloud);
  color:var(--c-ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  overflow-x:hidden;
}
img{ display:block; max-width:100%; height:auto; }
a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; cursor:pointer; }
input,textarea,select{ font-family:inherit; font-size:16px; }
h1,h2,h3,h4{ margin:0; letter-spacing:-.02em; }
p{ margin:0; }
ul{ margin:0; padding:0; list-style:none; }

.container{
  width:100%;
  max-width:var(--container);
  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{ max-width:1280px; padding-left:48px; padding-right:48px; } }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 22px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  transition:background-color .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease), transform .22s var(--ease), box-shadow .22s var(--ease);
}
.btn-primary{ background:var(--c-ink); color:var(--c-cloud); }
.btn-primary:hover{ background:var(--c-accent); color:#fff; transform:translateY(-1px); box-shadow:var(--sh-2); }
.btn-primary:active{ transform:translateY(0); }
.btn-primary:disabled{ background:#B7B3AC; color:#F3F1ED; cursor:not-allowed; transform:none; box-shadow:none; }
.btn-ghost{ background:transparent; color:var(--c-ink); border-color:rgba(22,25,29,.35); }
.btn-ghost:hover{ background:var(--c-ink); color:var(--c-cloud); border-color:var(--c-ink); transform:translateY(-1px); }
.btn-ghost:active{ transform:translateY(0); }
.btn-pill{ border-radius:var(--r-pill); }
.btn:focus-visible{ outline:2px solid var(--c-accent); outline-offset:3px; }
.link-text{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--c-jade);
  padding-bottom:2px;
}
.link-text::after{
  content:"";
  position:absolute;
  left:0; bottom:0;
  height:1px; width:0;
  background:var(--c-jade);
  transition:width .3s var(--ease);
}
.link-text:hover::after{ width:100%; }
.link-text:focus-visible{ outline:2px solid var(--c-accent); outline-offset:3px; }

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;
  top:0; left:0; right:0;
  z-index:60;
  background:rgba(250,249,246,.94);
  border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--c-line);
  box-shadow:0 1px 0 rgba(22,25,29,.03);
  backdrop-filter:blur(8px);
}
.nav-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:64px;
}
@media (min-width:1024px){ .nav-bar{ min-height:76px; } }
.brand{ display:flex; align-items:center; gap:12px; flex-shrink:0; }
.brand svg{ width:38px; height:38px; flex-shrink:0; }
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text b{ font-size:17px; font-weight:700; letter-spacing:-.02em; color:var(--c-ink); }
.brand-text small{ font-size:11px; letter-spacing:.16em; color:var(--c-ink-soft); }
.nav-links{ display:none; align-items:center; gap:6px; }
@media (min-width:1024px){ .nav-links{ display:flex; } }
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  font-size:15px;
  color:var(--c-ink-soft);
  transition:color .22s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%; bottom:8px;
  height:2px; width:0;
  background:var(--c-accent);
  transform:translateX(-50%);
  transition:width .26s var(--ease);
}
.nav-link:hover{ color:var(--c-ink); }
.nav-link:hover::after{ width:60%; }
.nav-link.is-active{ color:var(--c-ink); font-weight:600; }
.nav-link.is-active::after{ width:60%; }
.nav-link:focus-visible{ outline:2px solid var(--c-accent); outline-offset:2px; border-radius:6px; }
.nav-cta{ display:none; }
@media (min-width:1024px){ .nav-cta{ display:inline-flex; min-height:42px; padding:0 20px; font-size:14px; } }
.nav-toggle{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px; height:44px;
  border:1px solid var(--c-line);
  border-radius:var(--r-btn);
  background:var(--c-surface);
  color:var(--c-ink);
}
.nav-toggle:hover{ border-color:rgba(22,25,29,.4); }
@media (min-width:1024px){ .nav-toggle{ display:none; } }
.nav-toggle span{
  display:block; width:18px; height:1.6px; background:currentColor; border-radius:2px;
  position:relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:""; position:absolute; left:0; width:18px; height:1.6px; background:currentColor; border-radius:2px;
  transition:transform .24s var(--ease);
}
.nav-toggle span::before{ top:-6px; }
.nav-toggle span::after{ top:6px; }
.mobile-menu{
  position:fixed;
  inset:0;
  z-index:80;
  background:rgba(250,249,246,.97);
  display:flex;
  flex-direction:column;
  padding:22px 24px 40px;
  transform:translateY(-8px);
  opacity:0;
  visibility:hidden;
  transition:opacity .24s var(--ease), transform .24s var(--ease), visibility .24s;
}
.mobile-menu.is-open{ opacity:1; visibility:visible; transform:translateY(0); }
.mobile-menu-head{ display:flex; align-items:center; justify-content:space-between; }
.mobile-menu-close{
  width:44px; height:44px;
  border:1px solid var(--c-line);
  border-radius:var(--r-btn);
  background:transparent;
  color:var(--c-ink);
  font-size:20px;
  line-height:1;
}
.mobile-menu-close:hover{ border-color:rgba(22,25,29,.4); }
.mobile-nav{ margin-top:34px; display:flex; flex-direction:column; }
.mobile-nav a{
  font-family:var(--font-serif);
  font-size:24px;
  font-weight:700;
  letter-spacing:-.02em;
  padding:16px 0;
  border-bottom:1px solid var(--c-line);
  color:var(--c-ink);
  opacity:0;
  transform:translateY(10px);
  animation:none;
}
.mobile-menu.is-open .mobile-nav a{
  animation:riseIn .34s var(--ease) forwards;
}
.mobile-menu.is-open .mobile-nav a:nth-child(1){ animation-delay:.04s; }
.mobile-menu.is-open .mobile-nav a:nth-child(2){ animation-delay:.08s; }
.mobile-menu.is-open .mobile-nav a:nth-child(3){ animation-delay:.12s; }
.mobile-menu.is-open .mobile-nav a:nth-child(4){ animation-delay:.16s; }
.mobile-nav a.is-active{ color:var(--c-accent); }
.mobile-menu-foot{ margin-top:auto; padding-top:28px; }
@keyframes riseIn{ to{ opacity:1; transform:translateY(0); } }

/* ---------- 通用板块 ---------- */
main{ padding-top:64px; }
@media (min-width:1024px){ main{ padding-top:76px; } }
.section{ padding-top:64px; padding-bottom:64px; }
@media (min-width:768px){ .section{ padding-top:96px; padding-bottom:96px; } }
@media (min-width:1024px){ .section{ padding-top:120px; padding-bottom:120px; } }
.section-tight{ padding-top:44px; padding-bottom:44px; }
@media (min-width:768px){ .section-tight{ padding-top:60px; padding-bottom:60px; } }
.sec-head{ margin-bottom:40px; }
@media (min-width:768px){ .sec-head{ margin-bottom:52px; } }
.sec-kicker{
  display:inline-flex; align-items:center; gap:8px;
  font-size:13px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--c-ink-soft);
  margin-bottom:14px;
}
.sec-kicker::before{ content:""; width:22px; height:1px; background:var(--c-accent); }
h2.sec-title{
  font-family:var(--font-serif);
  font-size:clamp(24px,3vw,32px);
  font-weight:700;
  line-height:1.22;
}
.sec-sub{ margin-top:14px; max-width:60ch; color:var(--c-ink-soft); font-size:16px; line-height:1.85; }
.rule{ height:1px; background:var(--c-line); border:0; margin:0; }

/* ---------- 首屏 ---------- */
.hero{ position:relative; overflow:hidden; border-bottom:1px solid var(--c-line); }
.hero::before{
  content:"";
  position:absolute; inset:0;
  background:radial-gradient(720px 380px at 82% 12%, rgba(225,84,43,.06), transparent 68%);
  pointer-events:none;
}
.hero-inner{ position:relative; padding:48px 0 40px; }
@media (min-width:768px){ .hero-inner{ padding:68px 0 56px; } }
@media (min-width:1024px){ .hero-inner{ padding:84px 0 64px; } }
.hero-grid{ display:grid; gap:32px; }
@media (min-width:1024px){
  .hero-grid{ grid-template-columns:minmax(0,7fr) minmax(0,5fr); align-items:end; gap:56px; }
}
.hero h1{
  font-family:var(--font-serif);
  font-size:clamp(30px,4vw,48px);
  font-weight:700;
  line-height:1.14;
  margin-bottom:20px;
}
.hero-lead{
  font-size:17px;
  line-height:1.9;
  color:var(--c-ink-soft);
  max-width:56ch;
}
.hero-aside{ display:flex; flex-direction:column; gap:16px; }
.hero-figure{
  border:1px solid var(--c-line);
  border-radius:var(--r-img);
  overflow:hidden;
  background:var(--c-surface);
  box-shadow:var(--sh-1);
}
.hero-figure img{ width:100%; aspect-ratio:16/9; object-fit:cover; }
.hero-figure figcaption{
  padding:12px 16px;
  font-size:13px;
  color:var(--c-ink-soft);
  border-top:1px solid var(--c-line);
}
.hero-crumb{ font-size:13px; color:var(--c-ink-soft); margin-bottom:18px; }
.hero-crumb a:hover{ color:var(--c-ink); }
.hero-crumb span{ margin:0 8px; color:var(--c-line); }
.hero-crumb b{ color:var(--c-ink); font-weight:600; }

/* ---------- 三个关键点小卡 ---------- */
.key-cards{ display:grid; gap:16px; margin-top:44px; }
@media (min-width:768px){ .key-cards{ grid-template-columns:repeat(3,1fr); gap:20px; margin-top:56px; } }
.key-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
  transition:border-color .26s var(--ease), box-shadow .26s var(--ease), transform .26s var(--ease);
}
.key-card:hover{ border-color:rgba(22,25,29,.35); box-shadow:var(--sh-2); transform:translateY(-3px); }
.key-icon{
  width:40px; height:40px;
  display:flex; align-items:center; justify-content:center;
  border:1px solid rgba(225,84,43,.35);
  border-radius:10px;
  background:var(--c-accent-soft);
  color:var(--c-accent);
  margin-bottom:16px;
}
.key-card h3{ font-size:18px; font-weight:700; margin-bottom:8px; }
.key-card p{ font-size:14.5px; line-height:1.85; color:var(--c-ink-soft); }

/* ---------- 时间轴 ---------- */
.tl-wrap{ background:var(--c-ink); color:var(--c-cloud); border-radius:18px; padding:40px 20px 32px; }
@media (min-width:768px){ .tl-wrap{ padding:64px 48px 48px; border-radius:22px; } }
@media (min-width:1024px){ .tl-wrap{ padding:76px 64px 60px; } }
.tl-head{ margin-bottom:34px; }
.tl-head .sec-kicker{ color:rgba(250,249,246,.6); }
.tl-head h2.sec-title{ color:#fff; }
.tl-head .sec-sub{ color:rgba(250,249,246,.66); }
.timeline{ position:relative; padding:6px 0; }
.timeline::before{
  content:"";
  position:absolute;
  top:0; bottom:0;
  left:12px;
  width:1px;
  background:rgba(250,249,246,.16);
}
@media (min-width:1024px){
  .timeline::before{ left:50%; }
}
.tl-item{ position:relative; padding:18px 0 18px 46px; }
@media (min-width:1024px){
  .tl-item{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:56px;
    padding:22px 0;
  }
}
.tl-node{
  position:absolute;
  left:4px; top:32px;
  width:18px; height:18px;
  border-radius:50%;
  background:var(--c-ink);
  border:2px solid var(--c-accent);
  transition:background-color .26s var(--ease);
}
@media (min-width:1024px){
  .tl-node{ left:50%; margin-left:-9px; top:34px; }
}
.tl-item:hover .tl-node{ background:var(--c-accent); }
.tl-card{
  background:rgba(250,249,246,.045);
  border:1px solid rgba(250,249,246,.12);
  border-radius:var(--r-card);
  padding:22px 22px 24px;
  transition:border-color .26s var(--ease), background-color .26s var(--ease), transform .26s var(--ease);
}
.tl-item:hover .tl-card{ border-color:rgba(250,249,246,.3); background:rgba(250,249,246,.075); transform:translateY(-3px); }
.tl-step{
  font-family:var(--font-serif);
  font-size:13px;
  letter-spacing:.18em;
  color:var(--c-accent);
  margin-bottom:10px;
  display:block;
}
.tl-card h3{ font-size:19px; font-weight:700; color:#fff; margin-bottom:10px; }
.tl-card p{ font-size:15px; line-height:1.85; color:rgba(250,249,246,.72); }
.tl-meta{
  margin-top:16px;
  padding-top:14px;
  border-top:1px solid rgba(250,249,246,.12);
  font-size:13px;
  color:rgba(250,249,246,.55);
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
}
.tl-meta b{ color:rgba(250,249,246,.85); font-weight:600; }
@media (min-width:1024px){
  .tl-item .tl-card{ grid-column:1; }
  .tl-item:nth-child(even) .tl-card{ grid-column:2; }
}

/* ---------- 交付现场图卡 ---------- */
.shots{ background:var(--c-surface); border-top:1px solid var(--c-line); border-bottom:1px solid var(--c-line); }
.shots-grid{ display:grid; gap:20px; }
@media (min-width:768px){
  .shots-grid{ grid-template-columns:repeat(6,1fr); gap:24px; }
  .shot-lg{ grid-column:span 6; }
  .shot-sm{ grid-column:span 3; }
}
.shot{
  position:relative;
  border:1px solid var(--c-line);
  border-radius:var(--r-img);
  overflow:hidden;
  background:var(--c-cloud);
  box-shadow:var(--sh-1);
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.shot:hover{ transform:translateY(-3px); box-shadow:var(--sh-2); border-color:rgba(22,25,29,.3); }
.shot img{ width:100%; object-fit:cover; transition:transform .4s var(--ease); }
.shot-lg img{ aspect-ratio:21/9; }
.shot-sm img{ aspect-ratio:16/10; }
.shot:hover img{ transform:scale(1.02); }
.shot-cap{
  padding:16px 18px 18px;
  background:var(--c-surface);
  border-top:1px solid var(--c-line);
}
.shot-cap span{
  display:inline-block;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--c-jade);
  background:rgba(46,111,101,.08);
  border-radius:var(--r-pill);
  padding:3px 10px;
  margin-bottom:10px;
}
.shot-cap h3{ font-size:17px; font-weight:700; margin-bottom:6px; }
.shot-cap p{ font-size:14px; line-height:1.8; color:var(--c-ink-soft); }

/* ---------- 支持数据条 ---------- */
.metrics-bar{
  display:grid;
  grid-template-columns:1fr 1fr;
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  background:var(--c-surface);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
@media (min-width:768px){ .metrics-bar{ grid-template-columns:repeat(4,1fr); } }
.metric{
  padding:26px 20px;
  border-right:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
}
@media (min-width:768px){ .metric{ border-bottom:0; } .metric:last-child{ border-right:0; } }
.metric:nth-child(2n){ border-right:0; }
@media (min-width:768px){ .metric:nth-child(2n){ border-right:1px solid var(--c-line); } .metric:last-child{ border-right:0; } }
.metric b{
  display:block;
  font-family:var(--font-serif);
  font-size:clamp(28px,4vw,44px);
  font-weight:700;
  line-height:1.1;
  color:var(--c-jade);
  letter-spacing:-.02em;
}
.metric small{ display:block; margin-top:10px; font-size:13.5px; line-height:1.7; color:var(--c-ink-soft); }

/* ---------- 支持范围清单 ---------- */
.scope-grid{ display:grid; gap:32px; }
@media (min-width:1024px){ .scope-grid{ grid-template-columns:minmax(0,5fr) minmax(0,7fr); gap:64px; } }
.scope-list{ border-top:1px solid var(--c-line); }
.scope-row{
  display:flex;
  gap:18px;
  padding:22px 4px;
  border-bottom:1px solid var(--c-line);
  transition:transform .26s var(--ease), padding-left .26s var(--ease);
}
.scope-row:hover{ transform:translateX(4px); }
.scope-num{
  font-family:var(--font-serif);
  font-size:22px;
  font-weight:700;
  color:var(--c-accent);
  line-height:1.3;
  flex-shrink:0;
  min-width:36px;
  transition:color .26s var(--ease);
}
.scope-row:hover .scope-num{ color:var(--c-ink); }
.scope-row h3{ font-size:17px; font-weight:700; margin-bottom:6px; }
.scope-row p{ font-size:14.5px; line-height:1.8; color:var(--c-ink-soft); }

/* ---------- FAQ ---------- */
.faq-grid{ display:grid; gap:32px; }
@media (min-width:1024px){ .faq-grid{ grid-template-columns:minmax(0,4fr) minmax(0,8fr); gap:64px; } }
.faq-list{ display:flex; flex-direction:column; gap:12px; }
.faq-item{
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  background:var(--c-surface);
  overflow:hidden;
  transition:border-color .26s var(--ease);
}
.faq-item[open]{ border-color:rgba(22,25,29,.55); }
.faq-item summary{
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 22px;
  min-height:44px;
  font-size:16.5px;
  font-weight:600;
  cursor:pointer;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary:focus-visible{ outline:2px solid var(--c-accent); outline-offset:-2px; }
.faq-arrow{
  flex-shrink:0;
  width:26px; height:26px;
  display:flex; align-items:center; justify-content:center;
  border:1px solid var(--c-line);
  border-radius:50%;
  color:var(--c-ink-soft);
  transition:transform .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
}
.faq-item[open] .faq-arrow{ transform:rotate(45deg); border-color:var(--c-accent); color:var(--c-accent); }
.faq-body{
  padding:0 22px 22px;
  font-size:15.5px;
  line-height:1.9;
  color:var(--c-ink-soft);
}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--c-ink);
  color:var(--c-cloud);
  border-radius:18px;
  padding:40px 24px;
}
@media (min-width:768px){ .cta-band{ padding:56px 48px; border-radius:22px; } }
.cta-inner{ display:grid; gap:28px; }
@media (min-width:1024px){ .cta-inner{ grid-template-columns:minmax(0,7fr) minmax(0,5fr); align-items:center; gap:56px; } }
.cta-band h2{
  font-family:var(--font-serif);
  font-size:clamp(24px,3vw,34px);
  font-weight:700;
  line-height:1.22;
  color:#fff;
  margin-bottom:14px;
}
.cta-band p{ color:rgba(250,249,246,.7); font-size:16px; line-height:1.85; max-width:56ch; }
.cta-actions{ display:flex; flex-wrap:wrap; gap:14px; }
.cta-band .btn-primary{ background:var(--c-cloud); color:var(--c-ink); }
.cta-band .btn-primary:hover{ background:var(--c-accent); color:#fff; }
.cta-band .btn-ghost{ color:var(--c-cloud); border-color:rgba(250,249,246,.4); }
.cta-band .btn-ghost:hover{ background:var(--c-cloud); color:var(--c-ink); border-color:var(--c-cloud); }

/* ---------- 入口链接条 ---------- */
.entry-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:28px 0;
  border-top:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
}
.entry-row p{ font-size:15px; color:var(--c-ink-soft); }
.entry-links{ display:flex; flex-wrap:wrap; gap:28px; }

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-ink);
  color:rgba(250,249,246,.72);
  padding:64px 0 32px;
  margin-top:8px;
}
@media (min-width:768px){ .site-footer{ padding:88px 0 36px; } }
.footer-grid{ display:grid; gap:36px; }
@media (min-width:768px){ .footer-grid{ grid-template-columns:repeat(2,1fr); gap:40px; } }
@media (min-width:1024px){ .footer-grid{ grid-template-columns:1.4fr 1fr 1fr 1fr; gap:48px; } }
.footer-brand b{ display:block; font-size:18px; font-weight:700; color:#fff; letter-spacing:-.01em; }
.footer-brand small{ display:block; margin-top:4px; font-size:11px; letter-spacing:.16em; color:rgba(250,249,246,.5); }
.footer-brand p{ margin-top:16px; font-size:14.5px; line-height:1.85; max-width:34ch; color:rgba(250,249,246,.66); }
.footer-col h4{
  font-size:14px;
  font-weight:600;
  letter-spacing:.08em;
  color:#fff;
  margin-bottom:18px;
}
.footer-col li + li{ margin-top:12px; }
.footer-col a{
  font-size:14.5px;
  color:rgba(250,249,246,.7);
  transition:color .22s var(--ease);
}
.footer-col a:hover{ color:var(--c-accent); }
.footer-col a:focus-visible{ outline:2px solid var(--c-accent); outline-offset:3px; border-radius:4px; }
.footer-bottom{
  margin-top:52px;
  padding-top:24px;
  border-top:1px solid rgba(250,249,246,.14);
  display:flex;
  flex-wrap:wrap;
  gap:12px 28px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(250,249,246,.55);
}

/* ---------- 入场动画 ---------- */
.reveal{ opacity:0; transform:translateY(12px); }
.reveal.is-visible{
  opacity:1;
  transform:translateY(0);
  transition:opacity .6s var(--ease), transform .6s var(--ease);
}
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; transition-duration:.001ms !important; }
  .reveal{ opacity:1 !important; transform:none !important; }
  .shot:hover{ transform:none; }
  .shot:hover img{ transform:none; }
  .key-card:hover{ transform:none; }
  .tl-item:hover .tl-card{ transform:none; }
  html{ scroll-behavior:auto; }
}